TWI705359B - Connection inspecting apparatus - Google Patents

Abstract

The present invention provides a connection inspection device for confirming the connection state between a touch panel and a flexible substrate electrically connected to an end of the touch panel. The terminals connected to the two X-axis electrode wires are selected from the flexible substrate, and the terminal connected to the Y-axis electrode wires is selected as the connection inspection object. At this time, a pair of X-axis electrode wiring is used as a power supply electrode to provide an AC signal, and a detection signal is detected from a terminal connected to the inspection object on the flexible substrate. The determination of the connection state is performed based on the detection signal.

Description

Connection check device

The present invention relates to an inspection device used in a touch panel or the like, and relates to a connection inspection device that confirms the conduction state between the touch panel and a flexible substrate that is conductively connected to the end of the touch panel.

In recent years, touch panel technology has attracted attention as input terminals used as graphical user interfaces in mobile phones such as smartphones and tablet PCs. This touch panel technology is generally configured to arrange a plurality of electrode wirings in the X-axis direction and the Y-axis direction, and can detect the position coordinates touched by the user.

Generally, in large-scale touch panels used in tablet PCs, as a detection method, electrostatic capacitance is often used to detect position information. In such a touch panel, for wiring arranged in the X-axis direction and the Y-axis direction in the sensor area, lead wires are extended from both ends of the wiring. For example, in the touch panel shown in Patent Document 1, X electrode signal wiring and Y electrode signal wiring arranged in the sensor area are provided, and wiring is extended from the end of each signal wiring.

In addition, in such a touch panel, a connection pad is formed at the end of the wiring extending from the signal wiring. The connection pad serves as a terminal connected to the flexible substrate, which is used for conduction and connection with the motherboard, and the motherboard processing is used to detect the position based on the electrical signals (electrostatic capacitance) from the X electrode signal wiring and the Y electrode signal wiring Coordinate signal. In addition, the same connection pad is also provided on the flexible substrate, and each connection pad is electrically connected. That is, it is configured to transmit the electrical signal detected on the touch panel to the motherboard via the wiring of the flexible substrate. In addition, the flexible substrate is wired so that both ends of the X electrode signal wiring are conductively connected to transmit electrical signals to the motherboard, and the Y electrode signal wiring is electrically connected to both ends of the wiring to transmit electrical signals to the motherboard. .

Generally, regarding the X-Y electrode signal wiring formed on the touch panel, there is known a technique for performing electrical inspections such as conduction/short-circuit of each electrode signal wiring. For example, Patent Document 2 discloses a technique of inspecting the conduction/short-circuit of the X electrode signal wiring and the Y electrode signal wiring. In the inspection method disclosed in Patent Document 2, a contact probe arranged on the surface of a touch panel is used to provide an electrical signal for inspection, and conduction/short-circuit inspection of each electrode signal wiring is performed.

As described above, with regard to the technology for conducting/short-circuit inspection of the electrode signal wiring of the touch panel, the technology described in Patent Document 2 has been invented. However, there has not been an innovative method for inspecting the conduction connection between the touch panel and the flexible substrate. Therefore, even if the inspection of the electrode signal wiring of the touch panel is passed, the continuity and connection between the touch panel and the flexible substrate are poor, even if the electrical signal is supplied from the motherboard, the touch panel may The coordinate position cannot be detected accurately. Therefore, it is desired to innovate an inspection method and a connection inspection device for confirming the conduction connection state between the touch panel and the flexible substrate.

Patent literature

Patent Document 1: JP 2013-033549 A

Patent Document 2: JP 2011-090358 Publication

The present invention is proposed in view of the actual situation, and provides a connection inspection device for inspecting the conduction connection state between a touch panel and a flexible substrate conduction connection to the touch panel.

One aspect of the present invention provides a connection inspection device that performs a connection inspection between a touch panel and a connection substrate. The touch panel has a plurality of X-axis electrode wirings formed in the X-axis direction and a plurality of Y-axis electrodes formed in the Y-axis direction. Axial electrode wiring. The touch panel further has a plurality of X-axis connector wirings extending from both ends of the X-axis electrode wiring and connected to the X-axis connection portion, and a plurality of X-axis connector wirings extending from both ends of the Y-axis electrode wiring. A plurality of Y-axis joints connected to the Y-axis connection portion are wired, and the connection substrate has a first connection portion respectively connected to each X-axis connection portion and a second connection portion respectively connected to each Y-axis connection portion, The connection board further has a plurality of third connection portions, and the plurality of third connection portions have third connection portions that are connected to each other as the first connection portion connected to the same X-axis electrode wiring, and the sum becomes the same Y Phases of the second connecting portions connected by the shaft electrode wiring The third connection part of the connection, the connection inspection device has: a power supply unit which provides an AC signal for checking the connection state of the touch panel and the connection substrate; a detection unit which detects from the inspection object when the power supply unit provides an AC signal Detection signal; a connection unit that connects the upstream side of the power supply unit and the third connection portion connected to the electrode wiring formed in a given direction, and the downstream side of the power supply unit and is formed in the same given direction Connect the third connection portion connected to the other electrode wiring in the same direction, and connect the detection unit to the third connection portion connected to the electrode wiring formed in a direction different from the given direction; and the determination unit, which The goodness of the electrode wiring in the different direction is determined based on the detection result of the detection unit when the connection unit is connected to the detection unit.

In one embodiment, when the number of third connection parts connected to the upstream side of the power supply unit and the third connection part connected to the downstream side of the power supply unit are the same, the detection result is electrical When the output value is substantially the same as zero, the determination unit determines that the first connection part and the X-axis connection part, or the second connection part and the Y-axis connection part that are the inspection object are well connected.

In one embodiment, it is characterized in that when the number of the third connection part connected to the upstream side of the power supply unit and the third connection part connected to the downstream side of the power supply unit are different, the detection As a result, when the electrical output value is affected by the electrical signal supplied from the one with the larger number of the third connection parts connected to the upstream side or the downstream side, the determination unit determines that the first inspection object is A connecting portion and the X-axis connecting portion or the second connecting portion and the Y-axis connecting portion are well connected.

In one embodiment, the connection unit grounds a third connection portion other than the third connection portion electrically connected to the upstream side, the downstream side, and the detection unit.

According to the present invention, for example, the terminals connected to the two X-axis electrode wirings (third connection portions) are selected from the substrate of the inspection object, and the terminals connected to the Y-axis electrode wiring are selected as the connection inspection object. At this time, a pair of X-axis electrode wiring is used as a power supply electrode to provide an AC signal, and a detection signal is detected from a terminal (third connection portion) set as an inspection object. The determination of the connection state is performed based on the detection signal. Thereby, even in a state where the touch panel and the connection substrate (flexible substrate) are connected, the inspection can be performed by selecting the terminal that provides the inspection signal and the terminal to be the inspection target from the terminals provided on the flexible substrate.

Furthermore, since the number of third connection parts connected to the upstream side and the third connection part connected to the downstream side are the same, it can be determined that the connection state is good when the output value of the electric signal detected from the inspection object becomes zero. In addition, when the output value of the detected electrical signal is detected in a manner that is affected by the signal on the upstream or downstream side, the upstream or downstream connection is good, and the downstream or upstream connection is defective .

Furthermore, since the number of third connection parts connected to the upstream side and the third connection part connected to the downstream side are different, the inspection object is affected by the electrical signal of the upstream side or the downstream side that has the larger number. Therefore, if the connection of the inspection object is good, the party with the larger number will be The electrical signal is affected by the way the electrical signal is detected from the detection unit.

Furthermore, by grounding the electrode wiring that is not used as the power supply electrode and the detection electrode, the influence of the AC signal provided for the inspection can be eliminated. As a result, the connection state of the inspection object can be checked more accurately.

1‧‧‧Connection check device

2‧‧‧Power unit

3‧‧‧Detection unit

4‧‧‧Connecting unit

B‧‧‧Connect board

B1‧‧‧First connecting part

B2‧‧‧Second connecting part

B3‧‧‧The third connecting part

TP‧‧‧Touch Panel

x‧‧‧X axis electrode wiring

y‧‧‧Y-axis electrode wiring

Fig. 1 is a schematic explanatory diagram of a touch panel and a connection board.

Fig. 2 is a schematic configuration diagram showing a state where the touch panel to which the connection board is connected and the connection inspection device are connected.

Fig. 3 is a schematic configuration diagram for explaining the principle in the case of using the connection check device.

Fig. 4 is an equivalent circuit created based on the schematic configuration diagram of Fig. 3.

The best mode for carrying out the present invention will be described. First, a brief description will be given of the touch panel and the connection board used as the object to be inspected by the connection inspection device of the present invention. The touch panel TP includes: X-axis electrode wiring x (labeled x1 and x2 in FIG. 1), and Y-axis electrode wiring y (labeled y1 and y2 in FIG. 1) intersecting the X-axis electrode wiring x in a right-angle direction , A plurality of X-axis electrode wiring x and Y-axis electrode wiring y form a sensor area of the touch panel TP. The X-axis electrode wiring x and the Y-axis electrode wiring y are formed of, for example, an ITO (Indium Tin Oxide) film or the like.

By using the X-axis electrode wiring that forms the sensor area The x and Y axis electrode wires y are used to detect the user's touch position in the sensor area, thereby functioning as an input terminal. In FIG. 1, the outline of the touch panel TP is shown, and two X-axis electrode wirings x and Y-axis electrode wirings y are drawn respectively. The number of them is not particularly limited, and depends on the size of the touch panel TP and the manufacturer's design.

The touch panel TP is provided with wiring extending from both ends of the X-axis electrode wiring x, and these wirings are connected to the X-axis connection portion. In addition, the touch panel TP is also provided with wiring extending from both ends of the Y-axis electrode wiring y, and these wirings are connected to the Y-axis connection portion. The X-axis connection portion and the Y-axis connection portion are configured to not interfere with the sensor area. In addition, in this embodiment, for example, in FIG. 1, these X-axis connection portions and Y-axis connection portions are arranged in a row along one side of the touch panel TP.

The X-axis connection portion and the Y-axis connection portion are electrically connected to the connection board B described later. The X-axis connection portion and the Y-axis connection portion are formed in parallel on one side of the touch panel TP as shown in FIG. 1 so as to be easily connected to the connection board B. In addition, since the X-axis connection portion is formed by extending from both ends of the X-axis electrode wiring x, two X-axis connection portions are formed from one X-axis electrode wiring x. The same applies to the Y-axis connection portion, and two Y-axis connection portions are formed with respect to one Y-axis electrode wiring y. In addition, since the connection board B described later is placed on the touch panel TP, in FIG. 1, the X-axis connection portion and the Y-axis connection portion are present in positions not visible in FIG. 1, for example, are arranged on the connection board B The back side of the first connecting portion B1.

The connection board B has a plurality of first connection portions B1 electrically connected to the X-axis connection portion formed on the touch panel TP. About this first connection The part B1 forms the same number of first connection parts B1 as the X-axis connection parts. In addition, the connection board B has a plurality of second connection portions B2 electrically connected to the Y-axis connection portion formed on the touch panel TP. Regarding this second connecting portion B2, the same number of second connecting portions B2 as the Y-axis connecting portions are formed. The first connection portion B1 and the second connection portion B2 are formed in the shape of an electrode pad or the like and materials.

The connection board B has a plurality of third connection portions B3. The third connecting portion B3 has a third connecting portion B3 in which two first connecting portions B1 corresponding to the X-axis electrode wiring x are connected in parallel, and two second connecting portions corresponding to the Y-axis electrode wiring y are connected in parallel The third connection part B3 of B2. The third connection portion B3 is connected to an electrode pad of a motherboard or the like not shown. Thus, the third connection portion B3 is electrically connected to the X-axis electrode wiring x or the Y-axis electrode wiring y via the two first connection portions B1 or the second connection portion B2. In the connecting board B shown in FIG. 1, the first connecting portion B1 and the second connecting portion B2 are arranged side by side along one side of the board, and the third connecting portion B3 is arranged side by side along the side facing the side, but there is no Special restrictions. The above is the description of the touch panel TP and the connection board B to be inspected.

The connection inspection device 1 of the present invention can inspect the connection state of the touch panel TP and the connection board B as described above. The connection inspection device 1 has a power supply unit 2, a detection unit 3, a connection unit 4, a determination unit, and a control unit. FIG. 2 shows a state where the connection inspection device 1 is connected to the touch panel TP and the connection board B that are the inspection objects.

The power supply unit 2 provides an AC signal for checking the connection state of the touch panel TP and the connection board B. The power supply unit 2 can be used to provide Current source for streaming signals. The power supply unit 2 can be configured using two AC power supplies 21 and 22 as shown in FIG. 3. In the embodiment of FIG. 3, two identical AC power sources are connected in series, and the connection part is grounded. By using the two AC power supplies 21 and 22 in this way, one terminal and the other terminal of the power supply unit 2 can always provide signals with voltages of opposite phases (phases different by 180 degrees). In addition, in this specification, for convenience of description, one terminal of the power supply unit 2 is referred to as the upstream side, and the other terminal is referred to as the downstream side.

The detection unit 3 detects a detection signal from an inspection object that is an object for connection inspection when the power supply unit 2 provides an AC signal for inspection. The detection unit 3 is electrically connected to a third connecting portion B3. In this case, the third connecting portion B3 connected to the detection unit 3 becomes the inspection object, and the first connecting portion B1 or the second connecting portion B2 connected to the third connecting portion B3 and the X-axis connecting portion or Y-axis are inspected The connection status of the connection part.

The detection unit 3 can be a voltmeter or a current meter, for example. When the detection unit 3 detects a detection signal, it sends the detection signal as information (for example, as a detection signal value) to a determination unit or a storage unit described later. In addition, the detection unit 3 detects the detection signal, and determines whether the connection state of the X-axis connection portion and the first connection portion B1 or the connection state of the Y-axis connection portion and the second connection portion B2 is good or bad based on the value of the detection signal. , The details are described later.

The determination unit (not shown) determines the connection state of the inspection object based on the detection result detected by the detection unit 3. The determination unit and detection The unit 3 is connected to receive the detection signal value detected by the detection unit 3. The determination result of the determination unit determines the connection state of the X-axis connection portion and the first connection portion B1 or the connection state of the Y-axis connection portion and the second connection portion B2.

The specific determination method performed by the determination unit is explained. The determination method of this determination unit differs depending on the connection state of the third connection portion B3 connected to the power supply unit 2 controlled by the connection unit 4 described later.

First, the case where the number of third connection portions B3 connected to the upstream side of the power supply unit 2 through the connection unit 4 and the third connection portions B3 connected to the downstream side of the power supply unit 2 are the same will be described. The determination unit makes a determination based on the output value of the detection signal. If the output value is substantially zero, it is determined as the connection state between the X-axis connecting portion and the first connecting portion B1, or the Y-axis connecting portion and the second connecting portion B2. The connection is good. On the other hand, when the output value of the detection signal shows a predetermined value or more (not substantially zero), the determining unit determines the connection state of the X-axis connecting portion and the first connecting portion B1, or the Y-axis The connection state between the connecting portion and the second connecting portion B2 is poor.

The principle by which the determination unit can perform determination as described above will be explained. Fig. 3 is a schematic configuration diagram for explaining the principle of the case of using the connection check device. In this FIG. 3, the power supply unit 2 composed of two AC power supplies 21 and 22 provides inspection signals to the given X-axis electrode wiring x1 and x2, and inspects the second connection portion B2 connected to the Y-axis electrode wiring y1. The connection status between. In the state shown in Figure 3, the power supply unit 2 The upstream side is connected to one third connection part B3, and the downstream side of the power supply unit is connected to one third connection part B3. Thus, the number of third connecting portions B3 connected to the upstream side and the downstream side is one each, which is the same number. In addition, in the embodiment of FIG. 3, the number of electrode wirings connected to the upstream side and the downstream side is one each, but it may be two or more.

Although not shown in FIG. 3, the power supply unit 2 is controlled by the connection unit 4 so that the upstream terminal is connected to a given X-axis wiring electrode x (the X-axis wiring electrode shown by the reference number x2 in the figure), and, The connected unit 4 is controlled so that the downstream side terminal is connected to the X-axis wiring electrode x (the X-axis wiring electrode indicated by the symbol x1 in the figure) other than the given X-axis wiring electrode x. In addition, the third connection portion B3 to be connected to the Y-axis electrode wiring y is connected to the detection unit 3.

In this manner, when the connection state between the Y-axis connection portion of the Y-axis electrode wiring y and the second connection portion B2 is used as the inspection object, the X-axis electrode wiring x is used for the supply of the inspection signal. Although the two X-axis electrode wires x connected to the power supply unit 2 are not particularly limited, they preferably have a separation distance to the extent that they are not affected by (interference) by the inspection signal.

In addition, it is more preferable that the two selected X-axis electrode wirings have an equal distance from the center or an equal distance from the end of the touch panel TP. This is for the purpose of making it possible to easily process the calculation formula using the design value when the determination unit performs the calculation for determining whether the implementation is good or not. In addition, when the connection state between the X-axis connection portion of the X-axis wiring electrode x and the first connection portion B1 is used as the inspection object, the same application is also applied to the Y-axis electrode wiring y.

As shown in Figure 3, if two X-axis electrode wirings x1 and x2 are selected to provide inspection signals, the Y-axis electrode wiring y1 will be affected by the inspection signals from the two X-axis electrode wirings x1 and x2 (electrostatic capacitance coupling) . Fig. 4 is an equivalent circuit created based on the schematic configuration diagram of Fig. 3. As shown in this FIG. 4, the power supply unit 2 is an AC power supply, and the inspection signals whose phases are different by 180 degrees are supplied from both ends.

In addition, in FIG. 4, since the X-axis electrode wiring x1 and the Y-axis electrode wiring y1 are electrically connected by electrostatic capacitance coupling, there is an electrostatic capacitance coupling Cx1. Similarly, the X-axis electrode wiring x2 and the Y-axis electrode wiring y1 also have electrostatic capacitance coupling Cx2. In addition, the Y-axis electrode wiring y1 can be considered as being divided into three resistors (resistance Ry1, resistance Ry2, and resistance Ry3) from the electrostatic capacitance coupling portion (refer to FIG. 4). As a feature of the touch panel TP, it can be considered that the electrostatic capacitance coupling is substantially the same, and if the two X-axis electrode wires x are separated by the above-mentioned distance, the resistance Rx1 and the resistance Rx2 can be handled so that the resistance Rx1 and the resistance Rx2 are substantially equal.

That is, in the third connection portion B3, if the connection as the inspection target is good, it is affected by the AC signals whose phases are different by 180 degrees, and therefore the effects of the AC signals are cancelled out. As a result, the detection signal detected at the third connection portion B3 is detected as an output value of substantially zero.

If the connection state between the Y-axis connection portion of the Y-axis electrode wiring y and the second connection portion B2 is poor, the above-mentioned balanced relationship is collapsed, and the third connection portion B3 is affected by any inspection signal. Thus, the detection unit 3 detects an output value having a given numerical value (positive or negative). therefore, The determination unit determines whether the connection state is good or not based on the detection value detected by the detection unit 3.

Regarding the determination method of the above determination unit, it is explained that one electrode wiring (X-axis electrode wiring x) is connected to the upstream and downstream sides of the power supply unit 2, but it is not limited to one, and two or more can be selected. Of multiple. Even in the case where a plurality of electrode wirings are selected, when the number of electrode wirings connected to the upstream side and the downstream side is the same, the determination of the connection state is good or bad based on the same principle as the determination method described above.

Next, a case where the electrode wirings connected to the upstream side of the power supply unit 2 and the downstream side of the power supply unit 2 are different will be described. In addition, in the above description, the case where the number of electrode wirings respectively connected to the upstream side and the downstream side is the same is described. In this case, the following facts are used: if the connection condition of the inspection object is good, the electrical signal detected from the electrode wiring of the inspection object will cancel the electrical signal supplied from each electrode wiring. The output is zero.

When the number of electrode wirings respectively connected to the upstream side and the downstream side is different, the electrical signal supplied to the electrode wiring of the inspection object is biased toward the upstream side or the downstream side (+ electrode side or-electrode side). The goodness/badness of the connection condition of the inspection object is determined by using the bias of the supplied electric signal.

For example, when three electrode wirings are connected to the upstream side and two electrode wirings are connected to the downstream side, the electrode wiring of the inspection object will be affected by electrical signals supplied from the three electrode wirings connected to the upstream side. ring. That is, when considering the influence of the three electrode wirings on the upstream side and the two electrode wirings on the downstream side, a good electrode wiring is affected by the difference, that is, one electrode wiring on the upstream side.

The electrode wiring connected to the upstream side of the power supply unit 2 and the power supply unit 2 are connected in parallel. Thus, the plurality of electrode wirings are connected in series with the power supply unit 2 respectively. The same applies to the electrode wiring connected to the downstream side.

The connection unit 4 can electrically connect the power supply unit 2 and the detection unit 3 with a given third connection portion B3. The connection unit 4 can use a switching element, for example. With this switching element, electrical conduction/non-conduction (ON/OFF: ON/OFF) can be switched. In the case shown in FIG. 2, there are a switching element for connecting to the upstream terminal of the power supply unit 2, a switching element for connecting to the downstream terminal of the power supply unit 2, and a switching element for connecting to the detection unit 3. These are at least 3 switching elements. Three of these switching elements are provided for each of the third connecting portions B3 so that the third connecting portion B3 can be connected and switched with any terminal.

In the case shown in FIG. 2, since four third connecting portions B3 are provided, three switching elements corresponding to the third connecting portions B3 are provided, and as a whole, 12 switching elements are provided.

Even in the case of connecting a plurality of electrode wirings, the connection unit 4 can provide a plurality of conduction states by simultaneously controlling the on/off of the switching elements that electrically connect the respective electrode wirings. Therefore, it is possible to cope with the case where a plurality of electrode wirings connected to the upstream side and the downstream side are set (the same number or different numbers).

The connection unit 4 can also connect an unillustrated ground portion and electrode wiring. The ground portion is connected to a so-called reference potential point, and when connected to the ground portion, it becomes the reference potential. It is also possible to connect the ground portion to the above-mentioned two AC power sources. In addition, it can also be set as a third connection other than the third connection portion B3 (electrode wiring) connected to the upstream and downstream sides of the power supply unit 2 and the third connection portion B3 (electrode wiring) connected to the detection unit 3 The portion B3 (electrode wiring) is connected to the ground portion. Since the electrode wiring that is not used as the power supply electrode and the detection electrode is grounded, the detection capability of the detection electrode is improved.

The control unit (not shown) controls the operation of the power supply unit 2, the detection unit 3, the determination unit, and the connection unit 4. In order to perform the connection check, the control unit sends a signal to each unit to promote its operation. In addition, a storage unit (not shown) is provided in the connection inspection device 1 to store inspection-related information such as inspection procedures, inspection conditions, and inspection results.

When the control unit actually performs the inspection, first, in order to select two electrode wirings (for example, the X-axis electrode wiring x) that provide the inspection signal, it sends a signal to the connection unit 4 to connect the upstream terminal of the power supply unit 2 and Downstream terminal. Next, the control unit sends a signal to the connection unit 4 in order to select the electrode wiring (Y-axis electrode wiring y in this case) to be the inspection object to connect a given Y-axis electrode wiring y to the detection unit 3. Then, the control unit sends a signal to the detection unit 3 in order to detect the detection signal.

Next, the control unit transmits to the determination unit a signal that facilitates reception of the detection signal of the detection unit 3 and execution of the determination. Control sheet The element sends a signal to the connection unit 4 in order for the judgment unit to perform the judgment and perform the next inspection, so as to select the next inspection object. In this case, the switching element to which the detection unit 3 is connected is turned off, and the new Y-axis electrode wiring y is connected to the detection unit 3 by turning on the switching element.

In order to shorten the inspection time, the electrode wiring in one direction (axial electrode wiring) can be selected for power supply first, and the electrode wiring in the other direction can be inspected in sequence. Then, after the electrode wiring in the other direction is inspected, another The electrode wiring in one direction is selected as the power supply, and the electrode wiring in one direction is used as the inspection object to perform the inspection sequentially. In addition, as described above, when a plurality of wiring electrodes are selected as the power supply wiring, the control unit is operated to turn on the respective switching elements of the connection unit 4. In addition, the wiring electrode connected to the ground portion is also electrically connected to the ground portion by the control unit using a switching element not shown.

The above is the description of the structure and inspection principle of the connection inspection device.

Next, the inspection method will be explained using the connection inspection device 1. First, the touch panel TP to which the connection board B is connected as an inspection target is prepared. In this case, the connection unit 4 connected to the third connection portion B3 is prepared corresponding to the number of the third connection portion B3 of the connection board B.

Next, the connection inspection device 1 and the connection board B are electrically connected. In this case, a case where each electrode wiring connected to the upstream side and the downstream side is one is described. First, the X-axis electrode wiring x is set as a power supply electrode, and the Y-axis electrode wiring y for inspecting the connection state between the Y-axis connection portion and the second connection portion B2 is selected as the inspection target. At this time, the third connection part connected to the first connection part B1 connected to the X-axis electrode wiring x1 B3 is connected to the upstream terminal of the power supply unit 2. In addition, the third connection portion B3 connected to the first connection portion B1 connected to the X-axis electrode wiring x2 is connected to the downstream terminal of the power supply unit 2. Then, the third connection portion B3 connected to the second connection portion B2 connected to the Y-axis electrode wiring y to be inspected is connected to the detection unit 3.

After the power supply unit 2 and the detection unit 3 are respectively connected through the connection unit 4 in order to be able to perform a given inspection, an inspection signal is provided from the power supply unit 2. And, the detection unit 3 performs detection of the detection signal. At this time, the detection unit 3 sends the detection result to the determination unit.

The determination unit determines whether the connection state is good or bad based on the detection result. At this time, since the number of third connecting portions B3 connected to the upstream side and the downstream side is the same, if the output value of the detection result is substantially equal to zero, it is determined that the connection state is good. On the other hand, if the output value of the detection result is more than a predetermined value (not substantially zero), it is determined that the connection state is bad.

If the determination is completed, the connection of the detection unit 3 is changed through the connection unit 4 when the inspection is continued. The connection state of the connection to the Y-axis electrode wiring y is sequentially checked by the connection unit 4. After the inspection of the connection state to the Y-axis electrode wiring y is completed, the inspection of the connection state to the X-axis electrode wiring x is performed next. At this time, the Y-axis electrode wiring y is connected to the power supply unit 2 through the connection unit 4 for power supply.

After the connection inspections of the X-axis electrode wiring x and the Y-axis electrode wiring y are all completed in the above-mentioned procedure, the connection inspection is completed.

In addition, in the case where the number of the third connection portions B3 connected to the upstream side and the downstream side is different, if the connection status is good, it will be detected that it is strongly affected by the larger number of electrode wirings connected to the upstream side or the downstream side. Affected electrical signals.

1‧‧‧Connection check device

2‧‧‧Power unit

3‧‧‧Detection unit

4‧‧‧Connecting unit

B‧‧‧Connect board

B1‧‧‧First connecting part

B2‧‧‧Second connecting part

B3‧‧‧The third connecting part

TP‧‧‧Touch Panel

x‧‧‧X axis electrode wiring

y‧‧‧Y-axis electrode wiring

Claims (4)

A connection inspection device for inspecting the connection between a touch panel and a connecting substrate. The touch panel has a plurality of X-axis electrode wirings formed in the X-axis direction and a plurality of Y-axis electrode wirings formed in the Y-axis direction. The panel also has a plurality of X-axis connector wirings respectively extending from both ends of the X-axis electrode wiring and connected to the X-axis connection portion, and respectively extending from both ends of the Y-axis electrode wiring and connected to the Y-axis connection portion The connection board has a first connection portion connected to each of the X-axis connection portions and a second connection portion connected to each of the Y-axis connection portions, and the connection board also has A plurality of third connection parts, the plurality of third connection parts are connected to the first connection part connected to the same X-axis electrode wiring, and connected to the same Y-axis electrode wiring The third connection part of the second connection part that is connected to each other, the connection inspection device has: a power supply unit that provides an AC signal for checking the connection state of the touch panel and the connection substrate; a detection unit that provides AC in the power supply unit When a signal is detected, a detection signal is detected from the inspection object; a connection unit that connects the upstream side of the power supply unit and the third connection portion that connects the electrode wiring formed in a predetermined direction, and the downstream side of the power supply unit and Is connected to the third connection portion connected to the other electrode wiring formed in the same direction as the predetermined direction, and the inspection The measuring unit is connected to a third connecting portion connected to an electrode wiring formed in a direction different from the predetermined direction; and a determination unit based on the detection of the detection unit when connected to the detection unit through the connection unit As a result, the goodness of the electrode wiring in the different direction is judged. The connection inspection device according to the first item of the scope of patent application, wherein the third connection part connected to the upstream side of the power supply unit and the third connection part connected to the downstream side of the power supply unit are the same number Next, when the detection result is that the electrical output value is substantially the same as zero, the determination unit determines that the first connection part and the X-axis connection part, or the second connection part and the Y The shaft connection is well connected. The connection inspection device according to claim 1, wherein the number of the third connection part connected to the upstream side of the power supply unit and the number of the third connection part connected to the downstream side of the power supply unit are different In this case, when the detection result is that the electrical output value is affected by the electrical signal supplied from the one with the larger number of the third connection parts connected to the upstream side or the downstream side, the determination unit determines The first connection part and the X-axis connection part, or the second connection part and the Y-axis connection part, which are the inspection object, are well connected. The connection inspection device according to claim 1, wherein the connection unit grounds a third connection portion other than the third connection portion electrically connected to the upstream side, the downstream side, and the detection unit.

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