JP5963524B2 - LED selection device, LED selection program, and LED selection method - Google Patents

Description

  The present invention relates to an LED selection device, an LED selection program, and an LED selection method for selecting an LED to be mounted on an LED module.

  LEDs have large chromaticity variations compared to conventional light sources such as fluorescent lamps, and lighting fixtures that use LED modules as light sources have different chromaticities for each lot of LEDs. For this reason, even with the same type of lighting fixtures installed in the same space, there is a problem that trouble occurs in the market, such as light that is different from the lighting installed next to it. As a method for solving these problems, there is a technique for aligning combined light of individual LEDs so as to achieve a target chromaticity within an LED module in which a plurality of LEDs are mounted.

Japanese Patent No. 4846055 JP 2008-147563 A

  In recent years, LED lighting fixtures are required to have high efficiency, and in order to realize an LED module for lighting with higher luminous efficiency, it is necessary to light the LED with low wattage in terms of the characteristics of the LED.

  When an LED is lit at a low wattage, the amount of light emitted from one LED is small, and thus it is necessary to mount a large number of LEDs on one substrate in order to ensure the necessary amount of light.

  Moreover, since the light from LED changes with an electric current, it is preferable to light by a constant current circuit. At this time, in order to make the current of the LEDs mounted on one LED module uniform, all the LEDs may be connected in series and lighted with a constant current. However, when the number of LEDs to be connected is large, the voltage for lighting the LED module becomes high when connected in series.

  When the voltage for lighting the LED module becomes high, it is necessary to ensure the withstand voltage of the connector that is electrically connected to the LED module. Also, ensure the distance between the charged parts with different polarities of the wiring pattern formed on the board, and the insulation distance from the wiring pattern to the surface of the non-charged metal part that may be grounded or the non-metallic part that may be touched by people This is a factor that increases the substrate size of the LED module and the size of the housing of the lighting fixture.

  For this reason, in order to keep the voltage of the LED module low to some extent, the voltage and current per LED module can be adjusted if the electrical connection of each LED is connected in combination with series connection and parallel connection.

  However, when LEDs are connected in parallel in the LED module, the forward current flowing through each LED is biased due to variations in the forward voltage characteristics of the LEDs.

  When the variation in the forward voltage in the parallel is large, the bias of the current flowing through each LED is also large, and the load balance to the LED is different, which affects the luminance unevenness and the life characteristics.

  For this reason, in the LED module using series-parallel, there exists a subject that it is necessary to arrange forward voltage to some extent for every parallel circuit.

  In addition, since LED for low wattage has a small LED package size and it is difficult to control the amount of phosphor in manufacturing the LED, the chromaticity variation, which is the conventional problem of LED, becomes even larger, and the LED is more than ever. It is necessary to arrange light colors as modules.

  In addition, when manufacturing an LED module, it is not mounted on a single module board, but in a state where the module board is mounted on a carrier board even when the LED module is connected in the form of multiple sheets or an aluminum board. It becomes. In such cases, an integer number of sheets or carrier boards should be produced. That is, although a plurality of LED modules are mounted on one sheet or carrier board, it is desirable to prevent the LEDs from becoming insufficient during the production of one sheet or carrier board.

  In the prior art, the combined light of the LED module was prepared by combining the light colors of the LEDs, but the high-efficiency LED module using low-wattage LEDs was combined with the combination of the forward voltage and the combination of the substrates in addition to the combination to suppress color variation The manufacturing method of the combination which comprises an LED module by the combination per sheet | seat becomes a subject.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a manufacturing method in which forward voltage in a parallel connection is made uniform in LED modules connected in series and parallel, color variation is reduced, and LED inventory can be reduced.

The LED selection device of this invention is
M parallel connection parts in which M (M is an integer of 2 or more) LEDs are connected in parallel are connected in series to each other, and the mounted LED module to be produced belongs to a combined chromaticity range in which the combined light of the mounted LEDs belongs to a predetermined chromaticity range. In the LED selection device for selecting the LED to be selected from the inventory LEDs,
A combination of LEDs belonging to different chromaticity ranges, wherein a number ratio between the number of LEDs belonging to a specific chromaticity range and the number of LEDs belonging to another chromaticity range is set, and the number ratio The combined light of the plurality of LEDs indicates a combination of different LEDs having a chromaticity belonging to the chromaticity range of the combined light of the production target LED module, and the forward voltage of the LED that should belong to the specific chromaticity range LED that stores LED combination pattern information including a plurality of combination patterns that are combinations of LEDs in which the rank of the size of the LED and the rank of the magnitude of the forward voltage of the LED that should belong to the other chromaticity range are indicated A combination pattern information storage unit;
An LED inventory information storage unit that stores LED inventory information that determines the inventory quantity of LEDs belonging to the forward voltage rank and the chromaticity range from the forward voltage rank and the chromaticity range;
The total number of LEDs mounted on one LED module to be produced, the number M of LEDs in the M parallel connection unit, and the number included in the LED combination pattern information stored in the LED combination pattern information storage unit It is a mounting pattern of LEDs mounted on one of the production target LED modules determined based on the type of ratio and the type of rank of the forward voltage, and the total number of LEDs is the magnitude of the forward voltage A forward voltage that can be expressed by the number ratio indicated by the ranks, and is an LED mounting pattern in which the M parallel connection portions have the same rank of the forward voltage of M LEDs in the M parallel connection portions. A forward voltage reflecting mounting pattern information storage unit for storing forward voltage reflecting mounting pattern information having a plurality of reflecting mounting patterns;
The LED combination is input for each of the forward voltage reflecting mounting patterns of the forward voltage reflecting mounting pattern information stored in the forward voltage reflecting mounting pattern storage unit while inputting the production number information indicating the number of the LED modules to be produced. Stock for producing the production quantity indicated by the inputted production quantity information by referring to the LED combination pattern information stored in the pattern information storage section and the LED inventory information stored in the LED inventory information storage section And an LED selection unit that attempts to select an LED.

  According to the present invention, in an LED module in which a plurality of LEDs are mounted, chromaticity variation is reduced by combining the light colors of the respective LEDs, and a series-parallel configuration is used. An LED module in the input voltage range can be realized. Moreover, an LED module with a high LED utilization rate can be manufactured by selecting an optimal combination from LED inventory information.

The figure which shows LED module 20 which mounted LED36 light of Embodiment 1 in 6 series 6 parallel. FIG. 3 is a circuit diagram of the LED module 100 according to the first embodiment. 1 is a block diagram of an LED module manufacturing system 19 according to Embodiment 1. FIG. The figure which shows the forward voltage / chromaticity corresponding | compatible table 301 which shows the combination of the forward voltage division and chromaticity division of LED of Embodiment 1. FIG. The figure which shows the LED stock information 82 of Embodiment 1. FIG. FIG. 4 is a diagram illustrating a chromaticity division chromaticity diagram 401 obtained by dividing a LED having a forward voltage Vf of rank K according to the first embodiment. FIG. 5 is a diagram showing a chromaticity division chromaticity diagram 501 obtained by dividing a LED having a forward voltage Vf of rank L according to the first embodiment. FIG. 5 shows an LED combination pattern table 84 according to the first embodiment. FIG. 3 shows a mounting pattern table 701 according to the first embodiment. The figure which shows the combination of the forward voltage rank employable for each mounting pattern of FIG. The figure which shows the forward voltage reflecting mounting pattern table 85 of Embodiment 1. FIG. FIG. 12 is a diagram showing a continuation of the forward voltage reflecting mounting pattern table 85 of FIG. 11. FIG. 6 is a diagram illustrating an operation of the LED selection unit 160 according to the first embodiment. FIG. 3 shows a substrate connected in a sheet form according to the first embodiment. The figure which shows the board | substrate mounted in the carry board.

Embodiment 1 FIG.
With reference to FIGS. 1-15, the LED module manufacturing system 19 and the computer 10 (LED selection apparatus) of Embodiment 1 are demonstrated.

(LED module 20)
First, the LED module 20 targeted by the LED module manufacturing system 19 will be described. FIG. 1 is a diagram showing an LED module 20 in which LEDs are mounted in 6 series and 6 parallel. FIG. 2 is a circuit diagram of the LED module 20. In the following embodiments, a plurality of parallel connection portions in which a plurality of LEDs are connected in parallel are connected in series with each other, and a production target LED module in which the combined light of the mounted LEDs belongs to a predetermined chromaticity range is an object. Further, it is assumed that the number of LEDs in each parallel connection portion is equal to each other. This is because if there are parallel connection portions with different numbers of LEDs, the currents flowing through one LED will be different, so the brightness will be different. The production target LED modules of the following embodiments are N series M parallel LED modules in which M parallel connection parts in which M (M is an integer of 2 or more) LEDs are connected in parallel are connected in series to each other. is there. The LED selection unit 160 of the computer 10 to be described later selects an LED to be mounted on the production target LED module 20 from the inventory LEDs. In the following embodiments, as an example of an LED module in which a plurality of LED parallel circuits are connected in series, a 6-series 6-parallel LED module 20 in which 6 LED parallel circuits each consisting of 6 LEDs are connected in series will be described. To do.

(Assumption of LED selection)
As will be described later, when selecting the LED for manufacturing the LED module 20 shown in FIG. 2 from the inventory, the LED selection unit 160 of the computer 10 selects so as to satisfy the following conditions (1) and (2).
(Condition 1)
The combined light of 36 LEDs constituting 6 series 6 parallels is a target chromaticity range (a range consisting of G13, G14, G18, G19, or a range consisting of G13 ′, G14 ′, G18 ′, G19 ′) described later. Belonging to.
(Condition 2)
The rank of the forward voltage in one parallel circuit is the same. For example, in FIG.
The six LEDs of the first parallel connection circuit all have a forward voltage rank K (described later),
Each of the six LEDs of the second parallel connection circuit has a forward voltage rank L (described later),
Each of the six LEDs of the third parallel connection circuit has a forward voltage rank L (described later),
Similarly,
The six LEDs of the sixth parallel connection circuit all have a forward voltage rank K (described later).
In other words, if the LED forward voltage ranks are two types, K and L,
All six LEDs of the first parallel connection circuit are required to be K or L. The same applies to the other second to sixth parallel connection circuits.

(LED module manufacturing system 19)
FIG. 3 is a diagram illustrating a hardware configuration of the LED module manufacturing apparatus according to the first embodiment. The LED module manufacturing system 19 according to the first embodiment includes a server 8 that manages model production plan information 81, LED inventory information 82, model information 83, and an LED combination pattern table 84, and a color connected to the server 8 via a network. A computer 9 that manages degree sorting coordinates, a computer 10 that is connected to the server 8 via a network and manages combination information, an LED sorter 11 and a taping machine 12 that are connected to the computer 9 via a network, and the computer 10 Are formed of a solder printer 13, a solder inspection machine 14, a self-insertion machine 15, a reflow furnace 16, an electrical inspection machine 17, and an optical inspection machine 18.

(LED sorter 11)
The LED sorter 11 operates under the control of the computer 9, measures the chromaticity and forward voltage when the LED emits light, and sorts them into preset categories based on the measured chromaticity and forward voltage. Here, “selection into preset classifications” means 25 classifications of “classifications” G01 to G25 in the forward voltage K, which will be described later with reference to FIGS. 6 and 7, and 25 of “classifications” G26 to G50 in the forward voltage L. This means sorting into any one of the categories. Hereinafter, “classification” means G01 or the like.

(Taping machine 12)
The taping machine 12 operates under the control of the computer 9 and taps the LEDs sorted into the sections by the LED sorter 11 for each of the sections with different forward voltages, and the number information of each taped LED (source of inventory information). Data) is uploaded to the computer 9. In this way, the LED sorter 11 sorts the LEDs into chromaticity sections with different forward voltages, and the taping machine 12 taps the sorted LEDs into reels divided into chromaticity sections with different forward voltages. There is a possibility that the LED is lost due to an adsorption error or inspection error of the LED between the two operations. For this reason, the upload of the LED inventory information 82 of the server 8 to the database is the number of LEDs that have been finally taped. Note that the number of LEDs is counted in order to clarify the problems that occurred in each operation before the taping of the LEDs to the reel.

(Solder printer 13)
The solder printing machine 13 operates under the control of the computer 10, and solder is applied to the pads provided at the positions of the electrodes of the LEDs mounted on this board on the boards having different shapes, LED arrangements and quantities for each model. Print.

(Solder inspection machine 14)
The solder inspection machine 14 operates under the control of the computer 10, confirms the state of “solder” printed on the board by the solder printer 13, and inspects for any abnormality.

(Self-inserting machine 15)
The self-insertion machine 15 operates under the control of the computer 10, and the LEDs that are taped by the taping machine 12 and classified into “category” of each chromaticity range according to the difference in forward voltage are replaced with the model information 83, LED combination pattern of the server 8. By the output of each database of information 84 (also referred to as LED combination pattern table 84), solder is automatically inserted into each printed board by the solder printer 13 so as to obtain a combination that falls within a desired chromaticity range. The LED inventory information 82 for each chromaticity range after the LED is inserted is uploaded to the server 8 via the computer 10. Each information is described below.
As shown in FIG. 3, the computer 10 has the following information, for example.
(1) The “model production plan information 81” is information including the production number, production time, etc. of the model of the LED lighting device that uses the LED as a light source. Each production model also has information on production priority (production priority).
(2) “LED inventory information 82” is the number of LEDs in stock. The “LED inventory information 82” is shown in FIG.
(3) “Model information 83” is information relating to the model of an LED lighting device that uses an LED as a light source. The model information 83 includes a product model number (identification information for identifying the LED module) that identifies an LED module on which a plurality of LEDs are mounted, the number of LED lights (the total number of LEDs) indicating the number of LEDs mounted on the LED module, 6 module configuration information for identifying 6 series, 6 parallel, etc., and information such as target chromaticity indicating the chromaticity range to which the LED module should belong after the LED is mounted regarding the model.
(4) The “LED combination pattern table 84” will be described later with reference to FIG.
(5) The “forward voltage reflecting mounting pattern table 85” will be described later with reference to FIG.

(Reflow furnace 16)
The reflow furnace 16 operates under the control of the computer 10, and the board into which the LED is self-inserted by the self-insertion machine 15 is passed through the inside, and the board is heated and cooled with a prescribed temperature profile. The solder printed by 13 is melted, the electrode of the LED is fixed to the substrate with this solder, and the LED is mounted on the substrate.

(Electrical inspection machine 17)
The electric inspection machine 17 operates under the control of the computer 10 and checks the conduction state of the module board on which the LED is mounted by passing through the reflow furnace 16 and inspects whether the LED is mounted without an electrical problem. . The module substrate that has been determined to be acceptable by the electrical inspection machine 17 proceeds to the inspection process by the optical inspection machine 18. Note that the module board that has been determined to be rejected by the electric inspection machine 17 is not a product, and is discarded if the defective part is corrected or cannot be corrected in the correction process.

(Optical inspection machine 18)
The optical inspection machine 18 operates under the control of the computer 10 and powers on the LED module board that has passed through the electrical inspection machine 17 without any problem, and emits the LED to inspect whether it is within a desired chromaticity range. . The module substrate that has been determined to be acceptable by the optical inspection machine 18 is used in a lighting fixture and shipped as a product. The module substrate that has been determined to be rejected by the optical inspection machine 18 is not a product, and is discarded if the defective portion cannot be corrected or cannot be corrected in the correction process.

(Computer 10)
The computer 10 determines the LED module production possibility rate based on the model production plan information 81, the LED inventory information 82, the model information 83, the LED combination pattern table 84, the forward voltage reflecting mounting pattern table 85, etc. inputted from the server 8. To do. The LED inventory quantity reduced by the LED module production is fed back from the computer 10 to the LED inventory information 82 of the server 8. As shown in FIG. 3, the computer 10 includes a storage unit 150 (production module information storage unit, LED combination pattern information storage unit, LED inventory information storage unit, forward voltage reflecting mounting pattern information storage unit), LED selection unit 160, LED A usage determination unit 170 is provided. The storage unit 150 includes model production plan information 81, LED inventory information 82, model information 83, LED combination pattern table 84 (also referred to as LED combination pattern information), and forward voltage reflecting mounting pattern table 85 (also referred to as forward voltage reflecting mounting pattern information). ) Etc. The LED selection unit 160 inputs production unit information indicating the production number of LED modules to be produced. The LED selection unit 160 refers to the LED combination pattern table 84 (to be described later) and the LED inventory information 82 for each forward voltage reflecting mounting pattern in the forward voltage reflecting mounting pattern table 85 (to be described later). An attempt is made to select a stock LED for producing the production number indicated by the number information.

  The LEDs are preliminarily subjected to electrical inspection and optical inspection by the LED sorter 11 to measure and divide the forward voltage and chromaticity, and are stored as inventory LEDs (managed as LED inventory information 82 described later). In addition, when chromaticity and a forward voltage are divided at the time of purchase, inventory LED is managed based on this division information. The inventory LEDs are managed as LED inventory information 82, which will be described later, and information on the LED inventory quantity for each division category related to LEDs is stored in the storage unit 150 as “LED inventory information 82”. FIG. 4 is a forward voltage / chromaticity correspondence table 301 showing combinations of LED forward voltage sections and chromaticity sections. Here, as shown in FIG. 4, the forward voltage sections are divided into two sections of K and L ( A case will be described in which the chromaticity division is divided into 25 for each of the divided forward voltage divisions. G01 to G25 are chromaticity divisions of forward voltage rank K, and G26 to G50 are chromaticity divisions of forward voltage rank L. Note that G26 to G50 of the forward voltage rank L correspond to G01 to G25 of the forward voltage rank K (detailed in chromaticity diagrams 401 and 402 described later), and therefore, for example, G26 is also referred to as G01 ′. Notation is made easy to understand that G26 (rank L) is the same chromaticity classification as G01 (rank K). FIG. 5 is a diagram showing the LED inventory information 82. The LED inventory information 82 is similar to the forward voltage / chromaticity correspondence table 301 of FIG. 4, and belongs to the forward voltage rank and the LED belonging to the chromaticity range from the forward voltage rank and chromaticity range. This is a configuration in which the number of stocks can be obtained.

  As shown in FIG. 4, the chromaticity division of the forward voltage division K is 25 divisions from G01 to G25, and the chromaticity division of the forward voltage division L is 25 divisions from G26 to G50. 6 and 7 show chromaticity diagrams 401 and 402 in forward voltage sections K and L, respectively. As shown in FIGS. 6 and 7, G01 and G26 (G01 ′) have the same chromaticity range, and similarly G02 and G27,..., G25 and G50 (G25 ′) have the same chromaticity range. Divide like so. That is, Gn and Gn ′ are in the same chromaticity range (n: 01 to 25).

(Target chromaticity range)
Next, the target chromaticity range to which the chromaticity of the combined light of the LED module 20 should belong is determined. As shown in FIG. 6, in the case of the forward voltage section K, a range composed of four chromaticity ranges of G13, G14, G18, and G19 is set as a target chromaticity range of combined light that can be obtained by combining the respective LEDs. In the forward voltage section L, as shown in FIG. 7, G38, G39, G43, and G44 (G13 ′, G14 ′, G18 ′, and G19 ′) are set as the target chromaticity range.

(LED combination pattern table 84)
FIG. 8 shows combinations of LEDs that fall within the target chromaticity range of FIGS. FIG. 8 is an LED combination pattern table 84 (LED combination pattern information) indicating combinations of LEDs that fall within the target chromaticity range of FIGS. 6 and 7. The combination of the LED combination pattern table 84 takes into consideration the optical characteristics of the LED in advance, and also takes into account the specification range of the luminous flux in addition to the classified chromaticity range.

  For example, as shown in the combination pattern 4 of the row number 4, a combination in which the combined light is within the target chromaticity range even if one G01 in the forward voltage section K and one G25 in the forward voltage section K are combined. Become. Also, the combination of the same chromaticity range can be obtained by combining one G26 (G01 ′) and one G50 (G25 ′) of the forward voltage section L as in combination pattern 3 (row number 3). The combined light of the LED module 20 is in the target chromaticity range. In the LED combination pattern table 84 of FIG. 8, “′” is added to the number of LEDs to indicate that the number of LEDs corresponds to the forward voltage rank L. This notation is also used below.

  Further, in the case of the 1: 2 combination, as shown in the combination pattern 8 (row number 8), one G01 in the forward voltage section K and two G25 in the forward voltage section K are combined, that is, (1 : 2) is a combination in which the combined light falls within the target chromaticity range. Further, the combination of the same chromaticity range can be obtained by combining one G26 (G01 ′) and two G50 (G25 ′) in the forward voltage section L as in the combination pattern 7 (row number 7). That is, even in the combination of (1 ′: 2 ′), the combined light has a target chromaticity range.

  In addition, as in combination patterns 685 (row number 685) to 692 (row number 692), G13, G14, G18, G19 in the forward voltage section K, and G38, G39, G43, G44 (G13 ′) in the forward voltage section L. , G14 ′, G18 ′, G19 ′), a single LED provides a light color in the target chromaticity range.

  In this way, by aligning the forward voltage sections and combining the respective chromaticity sections so that each LED composite light falls within the target chromaticity range, the LED module with less color variation is the same forward voltage section in the parallel circuit. Can be manufactured. However, if only the combinations with the same forward voltage section are used, the LED modules are all in the forward voltage section K, and the LED modules are all in the forward voltage section L, and the LED module has extremely good light emission efficiency. Then, it is divided into only two types of LED modules with extremely low luminous efficiency. Further, when the LED inventory is only in the vicinity of G01 in the forward voltage section K and the forward voltage section L is only in the vicinity of G50, the LED inventory cannot be combined, and the LED inventory increases. In other words, if one LED module 20 is manufactured using only LEDs of the forward voltage section K rank or only LEDs of the forward voltage section L rank, the above-described problem occurs.

  Therefore, there is no problem as a combination of chromaticity. Further, as shown in combination pattern 1 (row number 1) or 2 (row number 2), etc., one forward voltage section K01 and one forward voltage section are set. The forward voltage division is different, such as one G50 for L (ie 1: 1 ′), or one G26 for forward voltage division L and one G25 for forward voltage division K (ie 1 ′: 1) A combination of different chromaticity categories is also adopted.

(Priority of LED combination pattern table 84)
Further, priority may be given to the LED combination pattern table 84 shown in FIG. For example, it is assumed that the row number also serves as “priority”. The smaller the line number, the higher the “priority”, meaning that the user wants to use it from the stock sooner.

  For example, as shown in row numbers 1 to 3 in FIG. 8, the priority of LED combinations with different forward voltage sections is increased. By preferentially mounting LEDs with different forward voltage sections in the LED module in this way, the input voltage of the LED module is averaged, and it becomes possible to produce an LED module that is closer to the standard value of electrical specifications. Become.

(Actual combination method)
Next, an actual combination method will be described. The LED combination pattern table 84 shown in FIG. 8 shows which sections of the chromaticity sections classified by the chromaticity of the LEDs fall within the target chromaticity range when combined at what ratio.

(Mounting pattern table 701)
FIG. 9 shows a mounting pattern table 701. The mounting pattern table 701 is a table showing how the number of LED combination ratios shown in the LED combination pattern table 84 of FIG. . The mounting pattern table 701 has only information on color combinations, but also requires a combination of forward voltage sections for connecting LEDs in series and parallel. That is, in addition to the color combination, it is necessary to consider the forward voltage rank combination.
In the 127 patterns of the mounting pattern table 701 in FIG. 9, the LED module 20 composed of 36 LEDs in total is configured using “(1: 2), (1: 1), single” which is the number ratio of LEDs. When you do it, you can get it mathematically.

  FIG. 10 shows combinations that can be realized by the forward voltage classification in the mounting pattern table 701 of FIG. 9 when the forward voltage classification is two types of the forward voltage classification K and the forward voltage classification L.

(1) In the case of a combination of three total LEDs as a ratio of (1: 2), if the number of forward voltage sections is “n sections”, the number of combinations is n ² .
(2) In the case of a combination of two total LEDs as a ratio of (1: 1),
(N × (n + 1)) / 2
It becomes a combination. This is obtained from n ² _−n C ₂ (minus overcounting).
(3) A single is a combination of the number n of forward voltage divisions.
(4) Therefore, when the forward voltage division is two divisions,
Combination of forward voltage division 2 division = 2 ² × (2 × (2 + 1)) / 2 × 2
= 4 x 3 x 2
= 24 ways.

  Therefore, in the LED module 20 with 36 LEDs, when the chromaticity division is 25 divisions and the forward voltage division is 2 divisions, there are 127 combinations × 24 combinations = 3048 combinations. This is the number of combinations when 24 patterns in the case where the number of forward voltage ranks n = 2 is reflected for each of 127 patterns of the mounting patterns 36-1 to 6-127 in the mounting pattern table 701. . This corresponds to the number of rows from a row “36-1- <1>” to a row “36-127- <24>” of the forward voltage reflecting mounting pattern table 85 described later.

  In the forward voltage reflecting mounting pattern table 85 to be described later, the parallel circuit must be configured with LEDs of the same forward voltage section. For this reason, among the 3048 patterns (each row of the forward voltage reflecting mounting pattern table 85), the one that can be actually selected is a row in which the total of the forward voltage sections is an integral multiple of the number of LEDs of the parallel circuit. Specifically, as shown in FIG. 2, the LED module 20 includes six LEDs in parallel circuits, and therefore, the total of the forward voltage sections K and the total of the forward voltage sections L must be multiples of six.

(Mounting pattern table 85 reflecting forward voltage)
11 and 12 show the forward voltage reflecting mounting pattern table 85. FIG. The forward voltage reflecting mounting pattern table 85 considers the combinations of the 24 forward voltages in FIG. 10 for each of the mounting patterns 36-1 to 36-127 of the mounting pattern table 701 (not reflecting the forward voltage) in FIG. It is a table. That is, the table reflects <1> to <24> in FIG. 10 with respect to the mounting pattern 36-k (k: 1 to 127). That is, the forward voltage reflecting mounting pattern 36-k- <i> (i: 1 to 24). Therefore, the number of rows (number of records) is k × i = 3048.

(Acceptance of each line)
For example, in the case of the LED module 20 with 36 LEDs, there are 12 sets of combinations of chromaticity divisions of (1: 2), and 36 sets of (1: 1) and a single combination are 0 sets, of which (1: 1: When the combination of 2) is (1: 2 ′) = (K: L), among the LEDs constituting 36 lamps, there are 12 forward voltage sections K and 24 L. If the parallel circuit is 6 series 6 parallel, this combination is established because the total number of LEDs in each forward voltage section is an integral multiple of 6 parallels. Further, the case of 9 series and 4 parallels is established because it is an integer multiple of 4 parallels. In the case of 4 series 9 parallel, it is not considered as a combination because it is not an integral multiple of 9 parallel.

In the forward voltage reflecting mounting pattern table 85 of FIG. 11 (including FIG. 12), each record whose “6 parallel combination possibility” is “possible” on the rightmost side of the item name is one LED module to be produced. The total number of LEDs mounted in 20 (referred to as “element A”), the number of 6 LEDs connected in 6 parallel connections (referred to as “element B”), and the number ratio type (referred to as “element C”) included in the LED combination pattern table 84. ) And the type of forward voltage rank (referred to as element D). More specifically, the forward voltage reflecting mounting pattern table 85 of FIGS. 11 and 12 is mathematically determined from the combination relationship of the mounting pattern table 701 of FIG. 9 and the forward voltage rank shown in FIG.
(1) Elements A and C:
Here, the mounting pattern table 701 in FIG. 9 includes a total of 36 LEDs (element A) and “(1: 2), (1: 1), single” which is the type of LED number ratio (element C). Mathematically determined from two pieces of information.
(2) Elements C and D:
In addition, in FIG. 10, there are 24 types (in the case of n = 2), the type of the LED number ratio (element C) “(1: 2), (1: 1), single” and the forward voltage of K rank and L rank. It is mathematically determined from the rank type (element D).
(3) Element B:
Further, 3048 patterns from 36-1- <1> to 36-127- <24> in the forward voltage reflecting mounting pattern table 85 of FIG. 10 are mathematically determined from FIGS. In the record “OK”, the number of K and the number of L in the “total” that is the second item from the right side of the item name are multiples of 6 (element B), which is the number of LEDs in parallel. It needs to be. (4) Therefore, as shown in (1) to (3), the “Yes” record in the forward voltage reflecting mounting pattern table 85 includes a total of 36 LEDs (element A) and 6 parallel connection LEDs. It is determined based on the number of LEDs (element B), the number ratio type (element C) included in the LED combination pattern table 84, and the forward voltage rank type (element D). As described in “(3) Element B:” above, the check regarding the element B (the number M of parallel LEDs) is the last time the forward voltage reflecting mounting pattern table 85 is created. Therefore, as described above, the forward voltage reflecting mounting pattern table 85 for 6 series 6 parallel can be used as a 9 series 4 parallel table.

(Generation of forward voltage reflecting mounting pattern table 85)
The LED selection unit 160 may create the forward voltage reflecting mounting pattern table 85. The LED selection unit 160 includes a total number (36) of LEDs mounted on the LED module 20 to be produced, a number M (6) of LEDs in 6 parallel connection units, and an LED combination pattern table 84. The number ratio type (1: 2, 1: 1, single) included in the stored LED combination pattern information and the forward voltage rank type (rank K, rank L) are input. The LED selection unit 160 includes the total number (36) of input LEDs, the number M (6) of LEDs connected in parallel, the number ratio type (1: 2, 1: 1, single), and the forward voltage. Based on the rank type (rank K, rank L), a plurality of forward voltage reflecting mounting patterns are generated. The LED selection unit 160 stores the generated plurality of voltage reflection mounting patterns in the storage unit 150 as the forward voltage reflection mounting pattern table 85.

When the LED modules of 36 LED lamps are calculated in the combination shown in the forward voltage reflecting mounting pattern table 85 of FIGS. 11 and 12 as a combination when the LED modules are configured in 6 series and 6 parallel, for example, 36-2- <1>
(1: 2 ′) = (K: L) 11 sets,
(1: 1 ′) = (K: L) 1 set,
Single = 1 K
However, the total number of LEDs in each forward voltage segment is 13 in the forward voltage segment K and 23 in the forward voltage segment L, and is not an integer multiple of the parallel circuit 6 in parallel. The outside combination.

  Here, considering the production of an actual LED module, there are few cases in which one LED module is mounted, and it is normal that the substrate is mounted with a plurality of connected sheets.

  For example, in the case of a resin substrate such as a glass epoxy substrate or a paper phenol substrate, an LED is mounted with a plurality of substrates connected as shown in FIG. Manufactured as one LED module. In addition, as shown in FIG. 15, metal substrates such as aluminum substrates and iron substrates have been extracted from the outer shape with a mold, so each substrate is a single substrate. A plurality of boards are mounted and a mounting process is performed for each carrier board.

  For this reason, the LED module must be mounted in units of sheets and units mounted on the carrier board at the same time. Therefore, the combination of LEDs on the LED module is at least the number of sheets and units mounted on the carry board. It is preferable to do.

  Therefore, except for the combinations shown in the forward voltage reflecting mounting pattern table 85 of FIGS. 11 and 12 described so far, the LED combination pattern shown in FIG. 8 is excluded except that the total of each forward voltage section does not become an integral multiple of the parallel circuit. In accordance with the table 84, the LED selection unit 160 of the computer 10 calculates the LED module production possibility rate in comparison with each LED inventory information.

That is, the number of modules that can be produced when the LED selection unit 160 of the computer 10 calculates the “production possible rate” is the number of modules in units of sheets or units mounted on the carrier board. This is for the following reason.
For example, it is assumed that five LED modules are mounted on one sheet. At this time, when it is desired to produce 100 LED modules, whether or not 20 sheets can be produced in terms of sheet unit is defined as a “production possible rate”. The “production possible rate” is calculated in sheet units (or carrier board units) based on the number of LED modules themselves. For example, if 54 LED modules can be produced, 10 sheets of completed sheets are converted in terms of sheets. Then, one unfinished sheet (one missing for completion) appears. This is because the unfinished sheet is not taken out.

(Operation of LED selection unit 160)
The operation of the LED selection unit 160 will be described below with reference to FIG. FIG. 13 is a diagram for explaining the operation of the LED selection unit 160. The LED selection unit 160 inputs production unit information indicating the production number of LED modules to be produced. The number of LED modules produced is the number of modules in units of sheets or units mounted on a carrier board as described above. The LED selection unit 160 refers to the LED combination pattern table 84 and the LED inventory information 82 for each forward voltage reflecting mounting pattern of the forward voltage reflecting mounting pattern table 85, thereby producing the production number (sheet) indicated by the input production number information. Select inventory LED to produce number). A specific example will be described below.

(1) It is assumed that the LED selection unit 160 inputs “20 sheets” (for 100 LED modules) as production unit information.
(2) The LED selection unit 160 calculates the production rate for each of the records in which “6 parallel combination availability” on the rightmost side of the item name is “possible” in the forward voltage reflecting mounting pattern table 85.
(3) For example, the LED selection unit 160 calculates the production possibility rate in order from the top with respect to the row of “OK” in the forward voltage reflecting mounting pattern table 85.

(A1. Record in the 26th line of the forward voltage reflecting mounting pattern table 85)
As a specific example, description will be made with a record (36-2- <2>) on the 26th line of the forward voltage reflecting mounting pattern table 85.
(1) Since the record in the 26th line is “OK”, the LED selection unit 160 sets this record as a calculation target of the production rate.
(2) The LED selection unit 160 starts from the record on the 26th line.
For one LED module,
(A) (1: 2 combination) is (1: 2 ′) 11 sets (33 LEDs),
(B) (1: 1 combination) is a set of (1: 1 ′) (2 LEDs),
(C) (single) is a set of (1 ') (one LED)
Recognize that
The production unit information is 20 sheets (100 LED modules) as described above. Therefore, in order to produce 20 sheets, the LED selection unit 160
(A) (1: 2 ') 11 groups x 100 units = 1100 groups (3300 LEDs),
(B) (1: 1 ′) 1 set × 100 units = 100 sets (200 LEDs),
(C) (single) (1 ') is 1 set x 100 units = 100 sets (100 LEDs),
Recognize that is necessary.

(A2.1100 (1: 2 ') search)
(1) First, the LED selection unit 160 refers to the LED combination pattern table 84 and the LED inventory information 82 as follows, and extracts 1100 sets (1: 2 ′). (1: 2 ′) means “forward voltage L” as described above, and (1: 2 ′) means “the number of LEDs of forward voltage K: the number of LEDs of forward voltage L”. ] = (1: 2). Further, (1 ′: 2) means “the number of LEDs of the forward voltage L: the number of LEDs of the forward voltage K” = (1: 2). The LED selection unit 160 searches the (1: 2 ′) record in order from the upper row (record) in the LED combination pattern table 84 (FIG. 13). By searching in order from the upper row (record), that is, by searching in order of priority, as described above, it is possible to select from the LEDs that are desired to be used quickly.
(2) Line number 5.
In the LED combination pattern table 84, first, since the row number = 5 is (1: 2 ′), the LED selection unit 160 has the content of the row number = 5 from the LED inventory information 82 (G01: G25 ′). The LED inventory information 82 is searched to see if 1100 sets = (1: 2 ′) exist in the LED inventory information 82. That is, the LED inventory information 82 is searched for whether there are 1100 LEDs belonging to G01, 2200 LEDs belonging to G25 ′ (G50), and the LED inventory information 82. If it exists, the corresponding number of LEDs are selected from the LED inventory information 82, and the search for 1100 sets of (1: 2 ′) ends. In the check of each record of the forward voltage reflecting mounting pattern table 85, when an LED is selected from the LED inventory information 82, the selected number of LEDs is subtracted from the LED inventory information 82.
(3) Line number 9.
If only 1000 sets out of the required 1100 sets can be selected with respect to the set of row number 5, the LED selection unit 160 then sets (G01, G24 ′) = (1: 2 ′) of row number 9 Move on to check. That is, the remaining (100 sets) of (1: 2 ′) is searched from (G01, G24 ′) = (1: 2 ′) of line number 9. When the LED selection unit 160 starts the check of (G01, G24 ′) = (1: 2 ′) of the row number 9, the LED selection information 160 in the LED stock information 82 in a state where the LED selected by the check of the row number 5 is subtracted. On the other hand, it is searched whether 100 sets of (G01, G24 ′) = (1: 2 ′) can be selected. When 100 sets can be selected, the corresponding LED is subtracted from the LED inventory information 82, and the search for 1100 sets of (1: 2 ′) is completed. When 100 sets could not be selected, for example, when only 90 sets could be selected, the LED selection unit 160 then selects the set of (G01, G20 ′) = (1: 2 ′) in row number 13. The remaining 10 sets are searched. Similarly, until 1100 sets of (1: 2 ′) can be selected, selection of inventory LEDs is attempted with respect to (1: 2 ′) rows (records) of the LED combination pattern table 84.

(A3.100 sets of (1: 1 ′) search)
The LED selection unit 160 performs 100 sets of (1: 1 ′) searches as described above (A2.1100 sets of (1: 2 ′) searches). That is, since (1: 1 ′), “the number of LEDs of the forward voltage K: the number of LEDs of the forward voltage L” = (1: 1).
(1) First, the LED selection unit 160 searches the LED combination pattern table 84 for the (1: 1 ′) record (or (1 ′: 1) record) in order from the upper row (record).
(2) Line number 1.
In the LED combination pattern table 84, since the row number = 1 is (1: 1 ′), the LED selection unit 160 has the content of the row number = 1 from the LED inventory information 82, (G01: G25 ′) = The LED inventory information 82 is searched for whether 100 sets of (1: 1 ′) exist in the LED inventory information 82. That is, the LED inventory information 82 is searched to determine whether there are 100 LEDs belonging to G01 and 100 LEDs belonging to G25 ′ (G50) in the LED inventory information 82. If it exists, the corresponding number of LEDs are selected from the LED inventory information 82, and the search for 100 sets of (1: 1 ′) is completed. In the check of each record, when the LED is selected from the LED stock information 82, the number of the selected LEDs is subtracted from the LED stock information 82 as described above.
(3) Line number 2.
If only 90 sets out of the required 100 sets can be selected with respect to the set of row number 1, then the LED selection unit 160 sets (G01 ′, G25) = (1 ′: 1) of row number 2 Move on to check. That is, the remaining 10 sets of (1: 1 ′) are searched from (G01 ′, G25) = (1 ′: 1) in row number 2. When the LED selection unit 160 starts the check of row number 2, the LED selection information 160 in the state where the LED selected by the check of row number 1 is subtracted is (G01 ′, G25) = (1 ′: 1). ) Is searched for whether 10 sets can be selected. When 10 sets can be selected, the corresponding LED is subtracted from the LED inventory information 82, and the search of 10 sets of (1: 1 ′) is completed. When 10 sets cannot be selected, the LED selection unit 160 proceeds to search for another (1: 1 ′) or (1 ′: 1) record until the required number of 100 sets is reached or all The selection of the inventory LED is attempted until the search for the record of (1: 1 ′) or (1 ′: 1) is completed.

(A4.100 sets of (1 ′) search)
Similarly to the above, the LED selection unit 160 performs 100 sets of (1 ′) search (that is, 100 LEDs each having one forward voltage L).
(1) As shown in FIG. 8, “single” appears from the row number 685 in the LED combination pattern table 84. The LED selection unit 160 searches the LED combination pattern table 84 for the record (1 ′) in order from the upper row (record).
(2) Line number 685.
In the LED combination pattern table 84, since the line number = 685 is (1 ′), the LED selection unit 160 has the content of the line number = 685 from the LED inventory information 82, (G13 ′) = (1 ′). The LED inventory information 82 is searched for whether 100 sets exist in the LED inventory information 82. That is, the LED inventory information 82 is searched for whether there are 100 LEDs belonging to G13 ′ in the LED inventory information 82. If it exists, the corresponding number of LEDs are selected from the LED inventory information 82, and the search for 100 sets of (1 ′) is completed.
(3) Line number 687.
If only 90 sets out of the required 100 sets can be selected with respect to the set of the row number 685, the LED selection unit 160 then proceeds to check the set of (G14 ′) = (1 ′) in the row number 687. To do. That is, the remaining 10 sets (10) of (1 ′) are searched from (G14 ′) of line number 687. When the LED selection unit 160 starts checking the row number 687, whether or not ten LEDs belonging to G14 ′ can be selected with respect to the LED inventory information 82 in a state where the LEDs selected by the previous check are subtracted. Explore. When 10 can be selected, the corresponding LED is subtracted from the LED inventory information 82, and the search of 10 sets of (1 ′) is completed. When 10 sets cannot be selected, the LED selection unit 160 proceeds to search for another (1 ′) record, and ends the search for all (1 ′) records until the required number of 100 sets is reached. Try to select a stock LED.

(A5. Production rate of row 26 of forward voltage reflecting mounting pattern table 85)
Since row 26 is 36-2- <2>, (α, β, γ) in FIG. 9 is a record corresponding to (11, 1, 1).
Therefore,
(1: 2 ') = required number of sets 1100,
(1: 1 ′) = required number of sets 100,
(1 ′) = required number of sets 100,
Against
(1: 2 ′) = 900 required sets,
(1: 1 ′) = required number of sets 100,
(1 ′) = required number of sets 100,
Suppose that
In this case, since the LED selection unit 160 has (1: 2 ′) = necessary number of 900 sets is insufficient with respect to the required number of 1100 sets,
In (α, β, γ) = (11, 1, 1),
Α = 11 corresponding to (1: 2 ′) is adopted,
Integer 81 is calculated from 900/11 = 81.8,
It is calculated that 81 LED modules can be produced.
Furthermore, since it is a sheet unit, the LED selection unit 160
81 units / 5 units = 16.2 = 16 sheets can be produced. On the other hand, the LED selection unit 160 inputs “20 sheets” (for 100 LED modules) as production unit information. Therefore, the LED selection unit 160
(16 sheets / 20 sheets) × 100% = 80%
And the production possibility rate of the record in the row 26 of the forward voltage reflecting mounting pattern table 85 is calculated as “80%”.

(B. Production rate of each bank)
The LED selection unit 160 executes the processing described in the above A1 to A5 for the “possible” rows in the forward voltage reflecting mounting pattern table 85, and performs sheet unit (or carrier board unit) in each row. Calculate “Production rate” based on It should be noted that when calculating the possible production rate of the “OK” row and proceeding to the processing of the next “OK” row, the LED selection unit 160 uses the LED inventory information 82 to calculate the possible production rate. It returns to the initial state (that is, the actual current stock state) immediately before execution. This is natural because the producible rate is calculated under the condition of the same LED inventory information 82 for each “OK” row of the forward voltage reflecting mounting pattern table 85. Then, the calculated “producible production rate” of each row is stored in the storage device, and output processing such as display or printing is performed on an output device such as a display device or a printing device as necessary (when an output request is made). Execute. The line with the highest production rate may be output, or the top multiple lines with the highest production rate may be output. It doesn't matter.

  By producing the LED module with the combination with the highest production rate by the above processing, in the LED module in which a plurality of LEDs are mounted, it is possible to reduce the chromaticity variation and realize an LED module in an appropriate input voltage range, It is possible to manufacture an LED module with a high LED utilization rate that can select an optimal combination from LED inventory information.

  In the first embodiment, the computer 10 (LED selection device) has been described. However, the operation of the LED selection device can be grasped as an LED selection method or an LED selection program.

  DESCRIPTION OF SYMBOLS 1 LED, 2 board | substrates, 3 connectors, 4 margins connected in sheet form, 5-1 slit between board | substrates, 5-2 perforation which connects between board | substrates, 6 carrier board, 7 wiring pattern, 8 server, 9 computer DESCRIPTION OF SYMBOLS 10 Computer, 11 LED sorter, 12 Taping machine, 13 Solder printer, 14 Solder inspection machine, 15 Self-insertion machine, 16 Reflow furnace, 17 Electrical inspection machine, 18 Optical inspection machine, 19 LED module manufacturing system, 20 LED Module, 82 LED inventory information, 84 LED combination pattern table, 85 forward voltage reflecting mounting pattern table, 150 storage unit, 160 LED selection unit, 170 LED usage determination unit, 301 forward voltage / chromaticity correspondence table, 401,501 chromaticity FIG. 701: mounting pattern table.

Claims (7)

M parallel connection parts in which M (M is an integer of 2 or more) LEDs are connected in parallel are connected in series to each other, and the mounted LED module to be produced belongs to a combined chromaticity range in which the combined light of the mounted LEDs belongs to a predetermined chromaticity range. In the LED selection device for selecting the LED to be selected from the inventory LEDs,
A combination of LEDs belonging to different chromaticity ranges, wherein a number ratio between the number of LEDs belonging to a specific chromaticity range and the number of LEDs belonging to another chromaticity range is set, and the number ratio The combined light of the plurality of LEDs indicates a combination of different LEDs having a chromaticity belonging to the chromaticity range of the combined light of the production target LED module, and the forward voltage of the LED that should belong to the specific chromaticity range LED that stores LED combination pattern information including a plurality of combination patterns that are combinations of LEDs in which the rank of the size of the LED and the rank of the magnitude of the forward voltage of the LED that should belong to the other chromaticity range are indicated A combination pattern information storage unit;
An LED inventory information storage unit that stores LED inventory information that determines the inventory quantity of LEDs belonging to the forward voltage rank and the chromaticity range from the forward voltage rank and the chromaticity range;
The total number of LEDs mounted on one LED module to be produced, the number M of LEDs in the M parallel connection unit, and the number included in the LED combination pattern information stored in the LED combination pattern information storage unit It is a mounting pattern of LEDs mounted on one of the production target LED modules determined based on the type of ratio and the type of rank of the forward voltage, and the total number of LEDs is the magnitude of the forward voltage A forward voltage that can be expressed by the number ratio indicated by the ranks, and is an LED mounting pattern in which the M parallel connection portions have the same rank of the forward voltage of M LEDs in the M parallel connection portions. A forward voltage reflecting mounting pattern information storage unit for storing forward voltage reflecting mounting pattern information having a plurality of reflecting mounting patterns;
For each of the forward voltage reflecting mounting patterns of the forward voltage reflecting mounting pattern information stored in the forward voltage reflecting mounting pattern information storage unit, the number of pieces of production information indicating the number of production of the production target LED modules is input. By referring to the LED combination pattern information stored in the combination pattern information storage unit and the LED inventory information stored in the LED inventory information storage unit, the production number indicated by the input production number information is produced. An LED selection device comprising: an LED selection unit that attempts to select a stock LED. The LED selector is
Production that can be produced with the forward voltage reflecting mounting pattern for the input production quantity information for each of the forward voltage reflecting mounting patterns of the forward voltage reflecting mounting pattern information when attempting to select an inventory LED The LED selection device according to claim 1, wherein a production rate indicating the number of units is calculated. The LED combination pattern information stored in the LED combination pattern information storage unit is:
Priority has been given to each set together the pattern of the plurality of sets combined pattern,
The LED selector is
3. The LED selection device according to claim 1, wherein selection of an inventory LED is attempted according to the priority. The production target LED module is:
At the time of production, a plurality of the production target LED modules are combined and produced in a module production unit state forming one unit,
The LED selector is
The LED selection device according to any one of claims 1 to 3, wherein a predetermined integer number of production units of the module production unit is input as the production unit information. The LED selector is
The total number of LEDs mounted on one LED module to be produced, the number M of LEDs in the M parallel connection unit, and the number included in the LED combination pattern information stored in the LED combination pattern information storage unit The ratio type and the forward voltage rank type are input, and a plurality of the input LED total number, the number M, the number ratio type, and the forward voltage rank type are selected based on the plurality of the forward voltage rank types. The forward voltage reflecting mounting pattern is generated, and the plurality of generated forward voltage reflecting mounting patterns are stored in the forward voltage reflecting mounting pattern information storage unit as the forward voltage reflecting mounting pattern information. The LED selection device according to any one of 4. M parallel connection parts in which M (M is an integer of 2 or more) LEDs are connected in parallel are connected in series to each other, and the mounted LED module to be produced belongs to a combined chromaticity range in which the combined light of the mounted LEDs belongs to a predetermined chromaticity range. An LED selection device which is a computer for selecting an LED to be selected from inventory LEDs;
A combination of LEDs belonging to different chromaticity ranges, wherein a number ratio between the number of LEDs belonging to a specific chromaticity range and the number of LEDs belonging to another chromaticity range is set, and the number ratio The combined light of the plurality of LEDs indicates a combination of different LEDs having a chromaticity belonging to the chromaticity range of the combined light of the production target LED module, and the forward voltage of the LED that should belong to the specific chromaticity range LED that stores LED combination pattern information including a plurality of combination patterns that are combinations of LEDs in which the rank of the size of the LED and the rank of the magnitude of the forward voltage of the LED that should belong to the other chromaticity range are indicated Combination pattern information storage unit,
An LED inventory information storage unit that stores LED inventory information that determines the inventory quantity of LEDs that belong to the forward voltage rank and belong to the chromaticity range from the forward voltage rank and chromaticity range;
The total number of LEDs mounted on one LED module to be produced, the number M of LEDs in the M parallel connection unit, and the number included in the LED combination pattern information stored in the LED combination pattern information storage unit It is a mounting pattern of LEDs mounted on one of the production target LED modules determined based on the type of ratio and the type of rank of the forward voltage, and the total number of LEDs is the magnitude of the forward voltage A forward voltage that can be expressed by the number ratio indicated by the ranks, and is an LED mounting pattern in which the M parallel connection portions have the same rank of the forward voltage of M LEDs in the M parallel connection portions. A forward voltage reflecting mounting pattern information storage unit for storing forward voltage reflecting mounting pattern information having a plurality of reflecting mounting patterns;
For each of the forward voltage reflecting mounting patterns of the forward voltage reflecting mounting pattern information stored in the forward voltage reflecting mounting pattern information storage unit, the number of pieces of production information indicating the number of production of the production target LED modules is input. By referring to the LED combination pattern information stored in the combination pattern information storage unit and the LED inventory information stored in the LED inventory information storage unit, the production number indicated by the input production number information is produced. LED selection section that tries to select stock LEDs,
LED selection program to function as M parallel connection parts in which M (M is an integer of 2 or more) LEDs are connected in parallel are connected in series to each other, and the mounted LED module to be produced belongs to a combined chromaticity range in which the combined light of the mounted LEDs belongs to a predetermined chromaticity range. LED selection method performed by an LED selection device that selects an LED to be selected from inventory LEDs,
LED combination pattern information storage unit
A combination of LEDs belonging to different chromaticity ranges, wherein a number ratio between the number of LEDs belonging to a specific chromaticity range and the number of LEDs belonging to another chromaticity range is set, and the number ratio The combined light of the plurality of LEDs indicates a combination of different LEDs having a chromaticity belonging to the chromaticity range of the combined light of the production target LED module, and the forward voltage of the LED that should belong to the specific chromaticity range LED combination pattern information including a plurality of combination patterns which are combinations of LEDs in which the rank of the size of the LED and the rank of the magnitude of the forward voltage of the LED to belong to the other chromaticity range are indicated;
LED inventory information storage unit
Stores LED inventory information for determining the inventory quantity of LEDs belonging to the forward voltage rank and belonging to the chromaticity range from the forward voltage rank and chromaticity range;
The forward voltage reflecting mounting pattern information storage unit
The total number of LEDs mounted on one LED module to be produced, the number M of LEDs in the M parallel connection unit, and the number included in the LED combination pattern information stored in the LED combination pattern information storage unit It is a mounting pattern of LEDs mounted on one of the production target LED modules determined based on the type of ratio and the type of rank of the forward voltage, and the total number of LEDs is the magnitude of the forward voltage A forward voltage that can be expressed by the number ratio indicated by the ranks, and is an LED mounting pattern in which the M parallel connection portions have the same rank of the forward voltage of M LEDs in the M parallel connection portions. Store forward voltage reflection mounting pattern information having a plurality of reflection mounting patterns,
LED selection part
For each of the forward voltage reflecting mounting patterns of the forward voltage reflecting mounting pattern information stored in the forward voltage reflecting mounting pattern information storage unit, the number of pieces of production information indicating the number of production of the production target LED modules is input. By referring to the LED combination pattern information stored in the combination pattern information storage unit and the LED inventory information stored in the LED inventory information storage unit, the production number indicated by the input production number information is produced. An LED selection method characterized by attempting to select a stock LED.

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