JP4585344B2 - Circuit board inspection apparatus and circuit board inspection method - Google Patents

Description

  The present invention relates to a circuit board inspection apparatus and a circuit board inspection method for inspecting a drive circuit board on which electronic components for driving various display panels such as a liquid crystal display panel and an EL display panel are mounted.

  Currently, various types of display panels such as liquid crystal display panels and EL display panels have been developed as display panels used in display devices. FIG. 4 is a top view showing an example of a liquid crystal display device (finished product) constructed using a liquid crystal display panel among these display panels, and a liquid crystal between two substrates 1a and 1b made of glass or silicon. A liquid crystal display panel 1 encapsulating a liquid crystal display panel, a drive circuit board (hereinafter referred to as a circuit board) 2 on which a drive circuit for controlling the display state of the liquid crystal display panel 1 is mounted, and the liquid crystal display panel 1 and the circuit board 2 It is comprised with the heat seal 3 electrically connected.

  The two substrates 1a and 1b constituting the liquid crystal display panel 1 are at least partially offset from each other, and display electrodes (not shown) of the display area 1d are provided at the offset portions (offset portions 1c). The control signal input electrode terminals (electrode terminal patterns) 4 derived from the above are arranged in an array.

  On the other hand, the circuit board 2 is provided with a plurality of electronic component mounting electrode terminals (hereinafter referred to as mounting terminals) 6 for mounting the respective electronic components 5 constituting the drive circuit. Each electronic component 5 is mounted by flip chip bonding or wire bonding. Here, the electronic component 5 is a component such as an LCD driver chip (driving IC), a capacitor, or a transistor in which control data of the liquid crystal display panel 1 is stored. In particular, the LCD driver chip 5 a is flip-chip on the circuit board 2. Bonding is implemented. In addition, a control signal output electrode terminal (electrode terminal pattern) 7 derived from each mounted electronic component 5 is disposed on one end of the circuit board 2 on the liquid crystal display panel 1. Are arranged in an array with a pattern shape corresponding to the electrode terminals 4 for use.

  The heat seal 3 for connecting the liquid crystal display panel 1 and the circuit board 2 is a sheet-like connector member, and one end of the circuit board 2 and the electrode terminal pattern 4 disposed in the offset portion 1 c of the liquid crystal display panel 1. Each is fixed to the electrode terminal pattern 7 disposed in the portion by thermocompression bonding. The state in which the circuit board 2 is connected to the liquid crystal display panel 1 through the heat seal 3 in this way is a state as a finished product of the liquid crystal display device.

  By the way, it is necessary to perform a continuity test on the circuit board 2 on which the drive circuit of the liquid crystal display device is mounted to determine whether or not the operation is normally performed. As a continuity test method, power is supplied to the circuit board 2 in a state in which the liquid crystal display panel 1 that is guaranteed to operate normally is connected to the circuit board 2 via the heat seal 3, that is, in a state where the liquid crystal display device is completed. There is a method in which the liquid crystal display panel 1 is turned on by actually operating the drive circuit mounted thereon, and the quality of the circuit board 2 is determined based on the display state of the liquid crystal display panel 1. In this case, since the liquid crystal display panel 1 has passed a single inspection in advance and is normally operated as a non-defective product, if a normal image is not displayed on the liquid crystal display panel 1 as a result of the inspection, It can be determined that the circuit board 2 is defective.

  However, since the inspection is performed with the liquid crystal display panel 1 connected to the circuit board 2 in the above inspection method, if the circuit board 2 is determined to be defective as a result of the inspection, not only the circuit board 2 is used. The entire liquid crystal display device including the liquid crystal display panel 1 connected thereto must be discarded. It is virtually impossible to disassemble the circuit board 2 and the liquid crystal display panel 1 once connected and return them to the original state. Therefore, a method for inspecting the circuit board 2 that eliminates the loss of the liquid crystal display panel 1 at the time of defect determination by conducting a continuity test on the circuit board 2 alone without connecting the liquid crystal display panel 1 to the circuit board 2 is proposed. Has been.

  FIG. 5 is a schematic diagram showing a circuit board inspection apparatus for inspecting the continuity of a circuit board, which has been proposed to eliminate the above-described loss of liquid crystal display panel. A driver circuit 12 for driving the liquid crystal display panel 11 is mounted at one end on the vertical scanning side of the display, and an inspection signal is applied to each electrode terminal (not shown) for driving signal input disposed at one end on the horizontal scanning side. On the other hand, an inspection signal generator 15 for outputting an inspection signal is installed on the drive circuit board 14 to be inspected on which all the electronic components constituting the drive circuit are mounted. In addition, a test signal input probe 16 is connected thereto, and a test signal input probe 16 and a test signal output probe 13 connected to the liquid crystal display panel 11 are connected in front. The drive circuit board 14 is arranged, and the respective probes 13 and 16 are actually brought into contact with the respective test signal input / output electrode terminals (not shown) arranged on the drive circuit board 14 to actually make the liquid crystal display panel 11. Is turned on, and the quality of the drive circuit board 14 is determined based on the display state of the liquid crystal display panel 11 at that time. (See Patent Document 1)

  In the above inspection apparatus, since the liquid crystal display panel 11 and the drive circuit board 14 are not connected to each other, the drive circuit board 14 can be inspected as a single unit, and the drive circuit board 14 is discarded when a defect is determined. Thus, at least the disposal loss of the liquid crystal display panel 11 is avoided.

JP 2000-35776 A

  According to the circuit board inspection apparatus that inspects the circuit board as described above, even if the circuit board is determined to be defective, at least the liquid crystal display panel does not have to be discarded. However, even if it is determined that the circuit board is defective, not all electronic components mounted on the circuit board are defective or poorly mounted, and only a small portion of them is defective or defective. Since there is a general case, even if the configuration of the inspection apparatus avoids the loss of the liquid crystal display panel, the loss of the normal electronic components other than the defective components mounted on the circuit board is still inevitable. Along with this, the man-hours for mounting those electronic components are wasted, and this is disadvantageous in terms of productivity.

  In particular, when the LCD driver chip of a liquid crystal display device is mounted on a circuit board, in addition to the large number of electrode terminals of the LCD driver chip, the pitch between the electrodes is narrow, so that conduction is made at that part. Defects are likely to occur. Further, the LCD driver chip is more expensive than other electronic components. Therefore, from the viewpoint of reducing the loss of waste at the time of defect determination, it can be said that it is desirable to conduct the continuity test at the stage where the LCD driver chip is mounted on the circuit board, but an effective inspection device has not yet been devised. is there.

  The present invention has been made in view of the above problems and situations, and even when a circuit board is determined to be defective, a circuit board inspection apparatus for a liquid crystal display device with little loss due to member disposal, It is another object of the present invention to provide a circuit board inspection method.

A circuit board inspection apparatus for inspecting a drive circuit board on which electronic components for driving a display panel are mounted, wherein at least a display panel placement stage for placing and positioning the display panel, and the display panel placement stage A drive circuit board mounting stage for mounting and positioning a drive circuit board on which at least one electronic component is mounted, and a dummy circuit board on which an electronic component other than the electronic component mounted on the drive circuit board is mounted And an electrode terminal of the display panel which is held so as to be movable back and forth with respect to the upper surface of the display panel mounting stage and the upper surface of the drive circuit board mounting stage, and is positioned and positioned on the display panel mounting stage, and the display panel to the electrode terminal of the drive circuit substrate placed positioned on the drive circuit board mounting stage in contact with the driving circuit board A first conductive member for conducting, the drive circuit is connected the dummy circuit board and electrically with the movably held against the upper surface of the substrate mounting stage, on the drive circuit board mounting stage a second conductive member to the electrode terminals of the drive circuit substrate placed positioned against through guide and said driving circuit board and the dummy circuit board, the power to the display panel through the driving circuit board Power supply means for supplying , based on the display state of the display panel when the display panel and the drive circuit board, and the drive circuit board and the dummy circuit board are electrically connected to each other, the drive The circuit board inspection apparatus is configured to determine whether the circuit board is good or bad.

It said first conductive member is a circuit board inspection device which is Zeburago beam.

It said first conductive member is a retractable rod-shaped shaft the circuit board inspection apparatus one end that is held in the the upper surface of the driving circuit board mounting stage against the biasing force of the spring.

The circuit board inspection apparatus includes a pressing member that abuts on the other end of the rod-shaped shaft and applies a pressing force toward one end of the shaft.

The second conductive member is a circuit board inspection device that is a probe .

  The display panel mounting stage is a circuit board inspection apparatus that can move horizontally in a direction perpendicular to the direction facing the driving circuit board mounting stage.

Wherein the upper surface of the drive circuit substrate mounting stage, and the drive circuit are circuit board inspection apparatus for locating pins are provided which fits into positioning holes provided on the substrate.

A circuit board inspection method for inspecting a drive circuit board on which electronic components for driving a display panel are mounted,
A display panel for which normal operation is guaranteed and a drive circuit board on which at least one electronic component is mounted are electrically connected to each other, and an electronic component other than the electronic component mounted on the drive circuit board and the drive circuit board is provided. A circuit board inspection method is provided in which the display panel is brought into a display state by electrically connecting the mounted dummy circuit board to each other, and the quality of the drive circuit board is determined based on the display state of the display panel.

  According to the present invention, since it is possible to perform a continuity test at the stage where some electronic components (for example, LCD driver chip) are mounted on the drive circuit board, the drive circuit board is determined to be defective as a result of the test. Even in such a case, only a part of the mounted electronic parts (however, including the drive circuit board main body) is discarded, and the loss of discarding other components that are not originally defective as defects is eliminated. In addition to this, productivity can be expected to increase.

  FIG. 1 is a view showing an embodiment of a circuit board inspection apparatus according to the present invention, wherein (a) a top view, (b) a front view, and (c) a side view. FIG. 2 is a top view showing a state in which the liquid crystal display panel and the drive circuit board are respectively placed on the liquid crystal display panel placement stage and the drive circuit board placement stage of the circuit inspection apparatus according to the present invention. FIG. 3 is an enlarged front view of a main part showing a state in which zebra rubber is brought into contact with electrode terminals of a drive circuit board. In FIG. 1C, a part of the configuration is omitted for convenience of explanation. Hereinafter, an embodiment of a circuit board inspection apparatus according to the present invention will be described with reference to FIGS. As shown in FIG. 1, a flat base portion 21 is horizontally supported at the bottom of the circuit board inspection apparatus by four leg portions 21a arranged at the four corners on the back surface side, on the front surface side flat surface. A drive circuit board mounting stage 22 for mounting the circuit board 2 to be inspected is installed at approximately the center of the circuit board. A first slide portion 23 having a slide mechanism is installed at a position adjacent to a drive circuit substrate placement stage (hereinafter referred to as a substrate placement stage) 22, and a liquid crystal for placing the liquid crystal display panel 1 on the top thereof. The display panel mounting stage 24 is slidably held.

  Positioning pins 22a for positioning the circuit board 2 are provided on the flat surface of the substrate mounting stage 22, as shown in FIG. 2, and the positioning pins 22a are provided in the circuit board 2 main body in advance. By positioning the circuit board 2 in the positioning hole 2a, the circuit board 2 is positioned during the continuity test. However, the method for positioning the circuit board 2 is not limited to this, and other configurations may be used as long as the circuit board 2 can be reliably positioned.

  As shown in FIG. 2, the liquid crystal display panel placement stage (hereinafter referred to as panel placement stage) 24 is adjacent to the substrate placement stage 22 by an arbitrary slide mechanism of the first slide portion 23 (not shown in FIG. 2). The horizontal movement is possible in a direction (longitudinal direction of the panel placement stage 24) orthogonal to the direction facing the substrate placement stage 22 with a certain interval maintained.

  The slide mechanism included in the first slide part 23 is configured such that the slide operation part 25 protruding from one side end of the first slide part 23 is moved forward and backward in the longitudinal direction of the panel placement stage 24, so that the panel mount is within a predetermined movable range. It is possible to position the mounting stage 24 at an arbitrary position. During the continuity test, the electrode terminal pattern 4 of the liquid crystal display panel 1 placed on the panel placement stage 24 and the electrode terminal of the circuit board 2 placed on the substrate placement stage 22 are operated by operating the slide operation unit 25. Positioning is performed so that the pattern 7 coincides with each other in the horizontal direction.

  Further, both the panel placement stage 24 and the substrate placement stage 22 are kept in a horizontal state, and the height of the flat surfaces of the liquid crystal display panel 1 and the circuit board is set on each of the placement stages 24 and 22. 2 is set so that the surface of the liquid crystal display panel 1 where the electrode terminals 4 are formed and the surface of the circuit board 2 where the electrode terminals 7 are formed are substantially flush with each other.

  A second slide portion 26 having an arbitrary slide mechanism (elevating mechanism) that can slide in the vertical direction is installed at a position facing the panel placement stage 24 with the substrate placement stage 22 in between, and an upper end portion thereof. Is provided with a probe holder 27 protruding toward the upper side of the substrate mounting stage 22. The probe holder 27 holds a plurality of contact probes (hereinafter referred to as probes) 28 that protrude perpendicularly toward the substrate mounting stage 22 disposed immediately below the probe holder 27. A dummy circuit board 30 of the same type as the circuit board 2 is fixed in an upright state via an L-shaped fixture (stay) 29, and further, a block-like shape is formed at the tip of the probe holder 27 protruding forward. A float mechanism 32 holding a zebra rubber 31 is installed.

  The probe holder 32 can be moved up and down while maintaining the parallel posture with respect to the circuit board 2 by the slide mechanism (elevating mechanism) of the second slide portion 26 described above. The movable range is set so that the tip of 28 is in contact with the mounting terminal 6 for mounting electronic components disposed on the surface of the circuit board 2.

  An electronic component (not shown) other than the electronic component 5 mounted on the circuit board 2 to be inspected is mounted on the dummy circuit board 30, and an electrode terminal similar to the circuit board 2 is mounted on one end thereof. A pattern (not shown) is provided. Connected to the electrode terminal pattern are lead wires (not shown) derived from the probe 28 held by the probe holder 27, whereby each electronic component mounted on the dummy circuit board 30 and each corresponding to it. The probe 28 is electrically connected to each other.

  Note that the circuit board inspection apparatus of the present invention performs continuity inspection before mounting all electronic components on the circuit board 2 to be inspected, and is mounted on the dummy circuit board 30 described above. The electronic component varies depending on the electronic component mounted on the circuit board 2 to be inspected. For example, when it is desired to conduct a continuity test with only the LCD driver chip 5a mounted on the circuit board 2, the electronic components mounted on the dummy circuit board 30 are all other electronic components except the LCD driver chip 5a. .

  The probe 28 electrically connected to the dummy circuit board 30 is held such that the upper end of the probe 28 penetrates into the probe holder 27, and the tip (lower end) is mounted on the dummy circuit board 30. Each electronic component is positioned so as to face each mounting terminal 6 of the circuit board 2 to be originally mounted.

  The float mechanism 32 provided at the tip of the probe holder 27 is held together by two rod-like float shafts 32a penetrating the probe holder 27 main body so as to be movable up and down, and lower ends of the two float shafts 32a. And a coil spring 32b for applying an urging force to the zebra rubber 31. The movement of the coil spring 32b in the horizontal direction is restricted by the float shaft 32a penetrating into the center thereof, and the upper end is fixed to the probe holder 27 and the lower end is fixed to the zebra rubber 31. In a state where no external force is acting (non-inspection state), the zebra rubber 31 is suspended from the lower end of the probe holder 27 (float state) together with the float shaft 32a that holds the zebra rubber 31. Therefore, in this state, the zebra rubber 31 is not in contact with the liquid crystal display panel 1 and the circuit board 2.

  Here, as shown in FIG. 1B, the two float shafts 32a of the above-described float mechanism 32 are directed downward at both ends of the base unit 21 between the panel placement stages 24 on the flat surface. The two clamp parts 33 for pressing are installed facing each other. The clamp portion 33 is for securely bringing the zebra rubber 31 into close contact (contact) with the liquid crystal display panel 1 and the circuit board 2 during a continuity test, and is held rotatably about the rotation shaft 33a. Clamp mechanism comprising a movable portion 33b, an operation lever 33d coupled to the rear end portion of the movable portion 33b via a coupling shaft 33c, and a pressing portion 33e fixed by screwing to the tip end portion of the movable portion 33b. have. Accordingly, when the operation lever 33d is pushed down during the clamping operation, the movable portion 33b is rotated downward (toward the upper surface of the panel mounting stage 24) within a certain movable range around the rotation shaft 33a, and the movable portion 33b. A pressing portion 33e held at the tip presses the upper end portion of the float shaft 32a.

  The zebra rubber 31 held at the lower end of the float shaft 32a is a kind of connector member in which an insulating rubber 31a and a conductive rubber 31b are laminated at equal intervals as shown in FIG. In the present embodiment, zebra rubber having a minimum insulating rubber / conductive rubber interval with respect to the width and interval of the electrode terminal pattern 7 disposed on the circuit board 2 is used. For the interval of 0.2 mm, the width and interval of the conductive rubber 31b of the zebra rubber 31 are set to 0.05 mm. Thereby, at the time of the continuity test, two or more conductive rubbers 31b always come into contact with the circuit board 2 and the electrode terminal patterns 4 and 7 of the liquid crystal display panel 1, and at least the zebra rubber 31 against the electrode terminal patterns 4 and 7 Conduction can be reliably achieved without strict position adjustment in the longitudinal direction (stacking direction of the insulating rubber 31a and the conductive rubber 31b).

  While the configuration of the circuit board inspection apparatus of the present invention has been described above, a circuit board inspection method using the inspection apparatus will be described below. In the following description, it is assumed that the circuit board on which only the LCD driver chip is mounted is an object to be inspected, and that the circuit board is inspected for the purpose of determining the mounting state of the LCD driver chip.

  First, the liquid crystal display panel 1 that is guaranteed to operate normally is positioned and fixed on the panel placement stage 24, and then the slide mechanism (elevating mechanism) of the second slide portion 26 is driven to retract the probe holder 27 upward. The circuit board 2 to be inspected is placed on the substrate placement stage 22. At this time, as shown in FIG. 2, the positioning hole 2a provided in the circuit board 2 is fitted to the positioning pins 22a on the flat surface of the substrate mounting stage 22 so that the circuit board 2 is reliably positioned.

  Next, the slide operation part 25 of the first slide part 23 is moved back and forth in the longitudinal direction of the panel placement stage 24 so that the electrode terminal pattern 4 of the liquid crystal display panel 1 and the electrode terminal pattern 7 of the circuit board 2 are placed on the panel. The stage 24 is positioned so as to coincide with each other in the longitudinal direction.

  When the positioning of the liquid crystal display panel 1 and the circuit board 2 is completed as described above, the slide mechanism of the second slide portion 26 is driven to lower the probe holder 27, and the tips of the plurality of probes 28 held there are moved. The circuit board 2 placed on the board placement stage 22 is brought into contact with each mounting terminal 6. Since the probe 28 is electrically connected to the electronic component mounted on the dummy circuit board 30 fixed to the upper part of the probe holder 27, when the probe 28 contacts the mounting terminal 6 of the circuit board 2 as described above. Thus, these electronic components are temporarily mounted on the circuit board 2.

  Further, as the probe holder 27 is lowered, the float mechanism 32 installed at the tip of the probe holder 27 is also lowered at the same time, and the zebra rubber 31 held at the lower ends thereof is the electrode terminal patterns 4 of the liquid crystal display panel 1 and the circuit board 2. , 7 in a bridging state. As a result, the liquid crystal display panel 1 and the circuit board 2 are electrically connected to each other via the zebra rubber 31. At this time, the zebra rubber 31 is pressed against the liquid crystal display panel 1 and the circuit board 2 because the urging force (extension force) of the coil spring 33b which is compressed as the probe holder 27 descends is applied to the zebra rubber 31 from above. Thus, reliable conduction between the electrode terminal patterns 4 and 7 is achieved.

  Next, the operation levers 33d of the two clamp portions 33 are respectively pressed down, and the pressing portions 33e of the clamp portions 33 are brought into contact with the upper ends of the two float shafts 32a of the float mechanism 32 in the float state. The abutting force (pressing force) of the pressing portion 33e acts on the zebra rubber 31 at the lower end portion thereof via the float shaft 32a, whereby the zebra rubber 31 is applied to the liquid crystal display panel 1 and the electrode terminal patterns 4 and 7 of the circuit board 2. The pressure contact force is increased, and conduction between the electrode terminal patterns 4 and 7 is further ensured.

  Finally, in this state, power is supplied to the liquid crystal display panel 1 through the circuit board 2 and the liquid crystal display panel 1 is turned on to actually light the liquid crystal display panel 1. As a result, if the display state of the liquid crystal display panel 1 is abnormal (display failure, non-lighting, etc.), it is determined that the mounting state of the LCD driver chip 5a is defective and the circuit board becomes defective. The display state can be confirmed by visual recognition or automatic recognition using an imaging device or the like.

  Although the circuit board 2 determined to be defective is discarded, only the LCD driver chip 5a is mounted on the circuit board 2 and the other electronic components are mounted on the dummy circuit board 30. Only the circuit board 2 main body and the LCD driver chip 5a mounted thereon are discarded. Therefore, the liquid crystal display panel 1 and many other normal electronic components are not discarded together with the circuit board 2.

  When moving to the next inspection after completion of the inspection, first, the clamping operation of the clamp portion 33 is released and the lowered probe holder 27 is retracted upward, and the circuit board 2 that has been inspected is removed from the substrate mounting stage 22. Subsequently, the new circuit board 2 is positioned and fixed on the substrate mounting stage 22 as in the previous inspection. At this time, since the circuit board 2 and the liquid crystal display panel 1 are secured to each other by the positioning positions of the positioning pins 22a of the substrate mounting stage 22 and the positioning positions of the panel mounting stage 24 at the previous inspection, respectively. Even if the circuit board 2 is replaced for each inspection, the electrode terminal patterns 4 and 7 always match. Therefore, it is not necessary to perform positioning again for each inspection, and the inspection can be performed efficiently.

  The circuit board inspection apparatus according to the present invention and the circuit board inspection method using the circuit board inspection apparatus have been described above. However, the electronic component mounted on the circuit board 2 to be inspected is not necessarily the LCD driver chip 5a described in the above embodiment. However, the present invention is not limited to this, and it is possible to perform a continuity test on circuit boards at any mounting stage on which other electronic components are mounted. That is, in that case, a circuit board at a stage where a desired electronic component is mounted may be set as an object to be inspected, and the electronic components other than the electronic component mounted thereon may be mounted on the dummy circuit board 30 in advance.

  In this embodiment, the probe holder 27 holds the probe 28 and the zebra rubber 31 together, but each may be held by separate holding members. Further, in this embodiment, the zebra rubber 31 and the probe 28 are used as means for conducting / non-conducting the liquid crystal display panel 1 and the circuit board 2 and between the circuit board 2 and the dummy circuit board 30, respectively. Other means may be used as long as the state can be switched. As for the slide mechanism of the first slide part and the second slide part, any means may be used as long as a predetermined slide operation can be obtained without departing from the gist of the present invention.

  The present invention is an apparatus for inspecting a circuit board having a circuit board as an object to be inspected, and a liquid crystal display panel can be obtained by previously installing a circuit board that ensures normal operation on a circuit board mounting stage. Can be used as an inspection apparatus for a liquid crystal display panel.

  In this specification, the display panel is described as a liquid crystal display panel. However, the present invention is not limited to this, and the liquid crystal display panel can be replaced with an EL display panel or the like.

  That is, the gist of the present invention is that a display panel, a drive circuit board at a predetermined mounting stage on which a drive circuit for driving the display panel is mounted, and an electronic component other than the electronic component mounted on the drive circuit board are mounted. The dummy circuit board is arranged separately from each other, and the display panel is turned on by making them mutually conductive, and the quality of the drive circuit board is determined based on the display state of the display panel at that time, The specific configuration can take other various forms.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Example of the circuit board inspection apparatus by this invention, (a) Top view, (b) Front view, (c) Side view The top view which shows the state which each mounted the liquid crystal display panel and the drive circuit board | substrate on the liquid crystal display panel mounting stage and drive circuit board | substrate mounting stage of the circuit inspection apparatus which concerns on this invention The principal part enlarged front view which shows the state which made the zebra rubber contact the electrode terminal of a drive circuit board Top view showing an example of a liquid crystal display (finished product) Schematic diagram showing a circuit board inspection device for inspecting continuity of a circuit board as a single unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 1a Panel board | substrate 1b Panel board | substrate 1c Offset part 1d Display area 2 Drive circuit board 2a Positioning hole 3 Heat seal 4 Electrode terminal pattern 5 Electronic component 5a LCD driver chip 6 Electrode component mounting electrode terminal (mounting terminal)
DESCRIPTION OF SYMBOLS 7 Electrode terminal pattern 11 Liquid crystal display panel 12 Driver circuit 13 Inspection signal output probe 14 Electronic component 15 Drive circuit board 16 Inspection signal generator 17 Inspection signal input probe 21 Base part 21a Leg part 22 Drive circuit board mounting stage 22a Positioning Pin 23 First slide part 24 Liquid crystal display panel mounting stage 25 Slide operation part 26 Second slide part 27 Probe holder 28 Contact probe 29 Stay 30 Dummy circuit board 31 Zebra rubber 31a Insulating rubber 31b Conductive rubber 32 Float mechanism 32a Float shaft 32b Coil spring 33 Clamp part 33a Rotating shaft 33b Movable part 33c Connection shaft 33d Operation lever 33e Press part

Claims (8)

A circuit board inspection apparatus for inspecting a drive circuit board on which electronic components for driving a display panel are mounted,
at least,
A display panel mounting stage for mounting and positioning the display panel;
A driving circuit board mounting stage that is mounted on the display panel mounting stage and mounts and positions the driving circuit board on which at least one electronic component is mounted;
A dummy circuit board on which electronic parts other than the electronic parts mounted on the drive circuit board are mounted ;
The display panel is movably held against the upper surfaces of the driving circuit board mounting stage of the mounting stage, the display panel placed placed on the stage positioning has been electrode terminals and the drive circuit of the display panel A first conductive member that contacts the electrode terminal of the drive circuit board placed and positioned on the substrate placement stage to electrically connect the display panel and the drive circuit board ;
The dummy circuit board and is electrically connected to the driving circuit electrodes of the driving circuit substrate placed positioned on the substrate mounting stage while being movably held against the upper surface of the driving circuit board mounting stage a second conductive member that abuts the terminal to pass through guide and said driving circuit board and the dummy circuit board,
Power supply means for supplying power to the display panel via the drive circuit board ,
The quality of the drive circuit board is determined based on the display state of the display panel at the time when the display panel and the drive circuit board and the drive circuit board and the dummy circuit board are electrically connected to each other. A circuit board inspection apparatus characterized by that. Said first conductive member is a circuit board inspection apparatus according to claim 1, characterized in that the Zeburago beam. Said first conductive member, according to claim 1 or, characterized that you have been retained to one end of the drive circuits axis of retractable rod-like with respect to the upper surface of the substrate mounting stage against the biasing force of the spring 2. The circuit board inspection apparatus according to 2. Circuit board inspection apparatus according to claim 3, characterized in that a pressing member for applying a pressing force toward the one end of the shaft abuts against the other end of the rod-shaped shaft. The circuit board inspection apparatus according to claim 1, wherein the second conductive member is a probe. 6. The circuit board according to claim 1, wherein the display panel mounting stage is horizontally movable in a direction orthogonal to a direction facing the driving circuit board mounting stage. Inspection device. 7. A positioning pin that fits into a positioning hole provided in the driving circuit board is provided on the upper surface of the driving circuit board mounting stage. Circuit board inspection equipment. A circuit board inspection method for inspecting a drive circuit board on which electronic components for driving a display panel are mounted,
A display panel for which normal operation is guaranteed and a drive circuit board on which at least one electronic component is mounted are electrically connected to each other, and an electronic component other than the electronic component mounted on the drive circuit board and the drive circuit board is provided. A circuit board inspection method comprising: bringing a display panel into a display state by electrically connecting a mounted dummy circuit board to each other; and determining whether the drive circuit board is good or bad based on a display state of the display panel.

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