JPH065470B2 - Luminescent display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a light-emitting display body in which a large number of light-emitting display body lamps such as LED lamps can be attached in a dot shape on the upper surface of one display body substrate. Regarding the improvement of the panel.

[Background technology and its problems]

As shown in FIG. 12, the conventional type of light emitting display panel of this type has a lead terminal 101 of an LED lamp 100.
The conductive pattern 1 formed on the back surface of the display substrate 102
No. 03 is attached to form a predetermined light emitting display pattern. Therefore, the LED lamp 10 is provided on the conductive pattern 103 formed on the back surface of the display substrate 102.
The mounting hole 104 for inserting the lead terminal 101 of 0 is provided, and the conductive pattern 1 is provided between the mounting holes 104 adjacent to each other.
A part of 03 is omitted.

However, in such a case, when the leads 101 of the LED lamp 100 are inserted into all the mounting holes 104 along the conductive pattern 103, the LED lamp 100 is directly inserted into the mounting holes 104 of the conductive pattern 103. However, when the LED lamp 100 is not attached, it is necessary to short-circuit a set of mounting holes 104 corresponding to the location with a shorting pin or the like. That is, in the conventional display panel, since the conductive pattern 103 is divided between the mounting holes 104 of the LED lamp 100, LE
Short-circuit pin (not shown) where D lamp 100 is not attached
Since the energizing circuit is not formed unless the circuit is short-circuited due to such reasons, the mounting wiring work is troublesome as described above.

By the way, LEDs have a low forward drop voltage (usually 1 V to
In addition, since the flowing current changes significantly when the supply voltage changes by several mV, the emission brightness also changes significantly. Moreover, even if the same lot product is used,
There are many variations in the electrical characteristics of the ED. For these reasons, when LEDs are individually connected in parallel, the currents that flow individually differ greatly, and the brightness also varies greatly. Therefore, the parallel connection, which has a simple connection structure and is easy to manufacture a substrate, is not suitable for practical use due to the above reasons for this kind of application (in order to avoid this, in general, a current stabilizing resistor is required for each LED. It is customary to provide).

On the other hand, since the forward drop voltage is low, the driving voltage may be low, but if these are connected in parallel, a large current is required (a general LED requires about 20 mA), and the conductive pattern of the substrate It becomes necessary to thicken.

In order to compensate for these drawbacks and to construct a lighting circuit using LEDs economically, a plurality (up to about 1 to 20) is required.
It is extremely advantageous in various points to connect the LEDs in series to supply power.

[Object of the Invention]

The present invention is proposed to achieve the above object,
It is an object of the present invention to provide a light emitting display panel that facilitates wiring work for mounting a light emitting display lamp such as an LED lamp.

[Means for solving problems]

The above-mentioned object is an improvement of a light emitting display panel in which a large number of light emitting display lamps are attached in a dot shape on the upper surface of one display substrate, and the light emitting display lamp has convex portions on its lower surface. The display body substrate has a plurality of conductive patterns formed on the upper surface thereof, and the convex portions of the light-emitting display body lamps are inserted into the portions forming the light emitting portions on the respective conductive patterns. It is characterized in that it has a structure in which it is ruptured when it is pressed.

〔Example〕

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 5 show a first embodiment A of the light emitting display panel of the present invention.

In the figure, 1 is a display substrate, glass epoxy,
A conductive pattern 2 is formed on the surface of paper phenol or the like as a base material.

As shown in FIG. 1, each pattern of the conductive pattern 2 is formed by arranging eight conductive lines 21 in parallel,
Each of the eight conductive lines 21 has a power supply terminal 22 above it.
(For example, the plus side), and the lower parts join each other to form one common line 23 (for example, the minus side). Each of the power supply terminals 22 and 23 has a mounting hole (through hole) 22a, 23a, and the power supply conductive portion is led out to the back surface of the substrate through the through hole. Power is supplied by inserting a power supply pin (not shown). In the illustrated example, the pattern is 8 × 8 × dots, so 8
Eight light emitting portions B are formed on each of the conductive lines 21, but in the case of a 16 × 16 dot pattern, there are 16 conductive lines and 16 light emitting portions on each conductive line.
In addition, the conductive pattern 2 includes eight light emitting portions B (actually,
Only the light emitting parts to which a light source such as an LED lamp is attached can emit light for lighting, but these are referred to as light emitting parts for the sake of convenience), and each light emitting part B has a lead terminal 31 of the LED lamp 3. , 31 for mounting and mounting 5,
One set of 5 is provided. If necessary, a light-reflecting paint or the like is applied to the light-emitting portion B formed by attaching the LED lamp 3 to form a light-reflecting surface.

A mask plate 6 is mounted on the upper surface of the display substrate 1 to improve visibility such as enlargement of light emitting dots, prevention of light leakage to an adjacent light emitting portion, and increase in viewing angle. The mask plate may be attached after the LED lamp is incorporated in the display substrate 1. The mask plate 6 is formed by forming through holes 61 corresponding to all the light emitting portions B of the display substrate 1 described above, and an inner peripheral wall surface 61a of the through holes 61 is a light reflecting surface (see FIG. 5). ). It is preferable that the surface of the mask plate 6 is of a black gray system, which has less light reflection.

On the other hand, the LED lamp 3 used in the present invention is provided with a convex portion 9 on the bottom surface thereof, and the LED lamp is provided in the mounting hole 5 (through hole) of the conductive pattern 2 constituting each light emitting portion B of the display substrate 1. When the lead 31 of 3 is inserted,
A part of the conductive pattern 2 is broken by the convex portion 9 provided on the bottom surface of the LED lamp 3, and the LED lamp 3 can be energized. In this case, the mounting connection of the LED lamp 3 to the display body substrate 1 is performed by connecting the conductive pattern 2 to the conductive portions 2a, 2a led out to the back surface of the substrate via the mounting holes 5 to the LED.
This is done by soldering the lead terminals 31, 31 of the lamp.

FIG. 6 is an explanatory diagram showing an example of the display configuration and driving outline of the light emitting display panel of the present invention, in which an LED lamp is incorporated to display a character pattern of “A”,
The lighting control circuit 7 controls the energization of each conductive pattern. The lighting modes are flicker display, column scanning lighting, and simultaneous lighting. r is a current adjusting resistor of the LED. A constant current circuit (not shown) may be used instead of such a resistor, and in this case, there is an advantage that the same circuit is sufficient even if the number of LEDs changes. In the drawing, the LED lamps are connected in series for each row, but it goes without saying that one to several rows may be connected in series and any other appropriate selection may be made. Further, it goes without saying that a plurality of light emitting display panels A of the present invention may be combined to display a certain announcement pattern. In the present invention, as shown in FIG.
Of the conductive patterns 2 formed on the upper surface of the display substrate 1,
A through hole 10 is provided in the substrate 1 of the portion 4 corresponding to the portion where the convex portion 9 of the LED lamp 3 is inserted. The conductive pattern 2 described above is formed on the upper surface thereof.

The display substrate 1 and the LED lamp 3 may be combined as shown in FIG. 3, for example. In this embodiment, there are two sets of LED lamps 3, that is, four lead terminals 3.
1, 31, 32, 32 are provided, and each of the corresponding light emitting portions B of the conductive pattern 2 of the other display substrate 1 is provided with two series of conductive patterns 21a, 21b. Light emitting part B
The portion 4 indicated by the dotted line in the figure shows the conductive pattern 21 when the convex portion 9 formed on the bottom surface of the LED lamp 3 is inserted.
The locations where a and 21b are broken are shown. In this embodiment, the LED lamp 3 incorporates two series of LEDs which are independent of each other as shown in FIG. 3a. The LEDs can be selectively turned on, and three lighting modes are possible, including lighting only one of the series and simultaneous lighting of both series.

Further, as a modification of such an embodiment, as shown in FIG. 4, three series of LEDs are incorporated in the LED lamp 3 (see FIG. 4a), and three series are provided for each light emitting part B of the display substrate 1. The conductive patterns 21a, 21b, and 21c are provided, and if the three primary colors of light are selected as the emission colors of the LEDs by selecting the combination of these 1 series to 3 series of built-in LED lamps, full-color lighting display by the additive color mixing method or 3 It is also possible to display three different patterns.

FIG. 7 to FIG. 11 show another example of the present invention, which is suitable for using an LED lamp (chip type LED) having an electrode portion on the bottom surface.

In the case of this embodiment (the parts corresponding to those of the first embodiment are the same or denoted by reference numerals with dashes), the LED lamp 3 '
Since it does not have the lead terminals 31 to 33 as described above, it is not necessary to provide the mounting holes 5 for inserting the lead terminals 31 to 33 on the display body substrate 1 side as well, and it is shown in FIG. A display substrate 1'provided with such a conductive pattern 2'can be used. A convex portion 9'is formed on the bottom surface of the LED lamp 3'as in the above-mentioned embodiment, and the display substrate 1'is formed.
By pressing it against the conductive pattern 21 'corresponding to the light emitting portion B, the portion is broken to form a lighting circuit of the LED lamp 3'.

To attach the LED lamp 3'to the upper surface of the conductive pattern 21 ', the electrode portion 31' provided on the bottom surface of the LED lamp 3'is directly connected to the conductive pattern 21 'by a conductive paste (silver paste or the like).
Attach it by (impairment).

FIGS. 8 to 10 are views for explaining this other example corresponding to FIGS. 2 to 4, and FIG. 11 is a view showing a mounting procedure of the light emitting display lamp in this embodiment. is there. The parts corresponding to those in the first embodiment are designated by the same reference numerals with a dash, and the description thereof will be omitted.

As described above, the present invention is a combination of a light emitting display lamp having a convex portion on the bottom surface thereof and a display body substrate configured to attach the light emitting display lamp in a dot shape. Particularly, when the above-mentioned light emitting display lamp is attached to the display substrate, the corresponding portion of the conductive pattern formed on the upper surface of the display substrate is broken by the convex portion of the light emitting display lamp, and the light emitting display lamp is attached. The light emitting display lamp can be energized and turned on. Therefore, it is said that the light emitting display lamp and the display substrate are included in the present invention as long as they embody the above-described inventive idea even if they are embodied in various modifications including the conductive pattern. There is no end.

For example, as an example thereof, a cut line may be formed in a portion of the convex portion of the light emitting display lamp of the display substrate to be inserted,
It may be formed by making the thickness of the substrate at that portion thinner than at other portions.

〔The invention's effect〕

As described above, the present invention is a combination of a light-emitting display lamp having a convex portion on the bottom surface thereof and a display-body substrate on which a large number of the light-emitting display bodies can be attached in a dot shape. , In particular, when the light-emitting display lamp is attached to the conductive pattern formed on the upper surface of the display substrate, a part of the conductive pattern at the corresponding portion is broken, and the attached light-emitting display is turned on. Because it is configured to be possible,
There is no need to short-circuit the non-attached portions of the light-emitting display lamps with short-circuit pins one by one like the conventional light-emitting display panel (in the present invention, it can be left as it is), and the installation wiring work. Will be even easier.

In addition, the light emitting display lamp has a structure capable of conducting multiple lines,
In the case where each light emitting part formed on the display substrate is provided with a plurality of series of conductive patterns, the light emitting color of each light emitting part can be freely changed, and multiple lighting display can be performed. There is an advantage that can be increased.

Further, in this embodiment, one LED lamp is provided for one light emitting unit.
It is needless to say that although a plurality of light-emitting elements are provided, one having a higher brightness or one having a larger light emitting portion may be provided.

[Brief description of drawings]

1 to 5 are views showing a first embodiment of the present invention, and FIG. 1 is a view showing a display substrate of a light emitting display panel,
2 to 4 are views showing the relationship between the light emitting display lamp and the conductive pattern of the light emitting portion of the display substrate, FIGS. 2a to 4a.
FIG. 5 is an electric circuit diagram of the light emitting display lamp shown in FIGS. 2 to 4, FIG. 5 is a diagram showing an outline of mounting the light emitting display lamp, and FIG. 6 is lighting of the light emitting display panel of the present invention. It is a control example figure. 7 to 11 are views showing a second embodiment of the present invention, FIG. 7 is a view showing a display body substrate of a light emitting display panel, and FIGS. 8 to 10 are light emitting display bodies. The figure which shows the relationship between the lamp and the conductive pattern of the light-emitting part of a display substrate, FIGS. 8a-10a are the electric circuit diagrams of the light-emitting display lamp shown in FIGS. 8-10, and FIG. It is a figure which shows the attachment point of a display body lamp. FIG. 12 is an explanatory diagram of a conventional light emitting display panel. (Explanation of Codes) A ... Light-emitting display panel of the present invention B ... Light-emitting portion 1, 1 '... Display substrate 2, 21a-21c, 2', 21'a-21'c.・ ・
Conductive pattern 3, 3 '... Luminescent indicator lamp 31-33 ... Lead terminal 31'-33' ... Electrode portion 9, 9 '... Convex portion 4 ... Breakable portion 5. ..Luminescent indicator lamp mounting holes 6 ... Mask plate 61 ... Through holes

Claims (3)

[Claims] 1. A light emitting display panel in which a large number of light emitting display lamps are mounted in a dot shape on the upper surface of one display body substrate, and the light emitting display lamp has a convex portion on its lower surface. The display substrate is provided with a plurality of conductive patterns on the upper surface thereof, and the convex portion of the light-emitting display lamp is inserted into the portion forming the light emitting portion on each conductive pattern. A light-emitting display panel, characterized in that it has a structure that breaks when exposed to light. 2. The light emitting display lamp has a structure in which a lead is inserted into a mounting hole formed in a conductive pattern formed on an upper surface of the display substrate on a lower surface thereof. The light emitting display panel according to claim 1. 3. The light-emitting display lamp has a structure in which an electrode portion joined to a conductive pattern formed on the upper surface of the display substrate is provided on the lower surface of the light-emitting display lamp. The light emitting display panel according to item 1.