TW201629733A - Connection inspecting apparatus - Google Patents

Abstract

The present invention provides a connection inspecting apparatus for confirming a connection status between a touch panel and a flexible substrate conductively connected with an end of the touch panel. Terminals connected with two X-axis electrode wiring are selected from the flexible substrate and a terminal connected with Y-axis electrode wiring being also selected to serve as connection inspecting objects. Therefore, the pair of X-axis electrode wiring is used as power supply electrode for providing an alternate signal and an inspecting signal is detected from the terminals of the connection inspecting objects on the flexible substrate. The connection status is determined based on the inspecting signal.

Description

Connection check device

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

In recent years, touch panel technology has attracted attention as an input terminal used as a graphical user interface in mobile phones such as smart phones and tablet PCs. In the touch panel technology, a plurality of electrode wirings are generally disposed in the X-axis direction and the Y-axis direction, and the position coordinates touched by the user can be detected.

Generally, in a large touch panel used in a tablet PC, as a detection method, position information is often detected by electrostatic capacitance. In such a touch panel, lead wires are extended from both ends of the wiring for the wiring arranged in the X-axis direction and the Y-axis direction of the sensor region. For example, in the touch panel disclosed in Patent Document 1, an X electrode signal wiring and a Y electrode signal wiring disposed in the sensor region are provided, and wiring is extended from an end portion of each signal wiring.

Further, such a touch panel has connection pads formed at ends of wirings extending from signal wirings. The connection pad becomes a terminal connected to the flexible substrate for being electrically connected to the motherboard, and the motherboard processing is for detecting the position based on an electrical signal (electrostatic capacitance) from the X electrode signal wiring and the Y electrode signal wiring. The signal of the coordinates. In addition, the same connection pads are also provided on the flexible substrate, and the respective connection pads are electrically connected. That is, it is configured to transmit an electrical signal detected on the touch panel to the motherboard via the wiring of the flexible substrate. Further, the flexible substrate is wired so as to electrically connect both ends of the X electrode signal wiring to the motherboard, and is electrically connected so as to electrically connect both ends of the Y electrode signal wiring to the motherboard. .

In general, regarding the X-Y electrode signal wiring formed on the touch panel, a technique of performing electrical inspection such as conduction/short circuit of each electrode signal wiring is known. For example, Patent Document 2 discloses a technique of inspecting ON/OFF of an X electrode signal wiring and a Y electrode signal wiring. In the inspection method disclosed in Patent Document 2, an electric signal for inspection is provided using a contact probe disposed on the surface of the touch panel, and inspection of conduction/short circuit of each electrode signal wiring is performed.

As described above, the technique described in Patent Document 2 has been invented for the technique of performing the on/off detection of the electrode signal wiring of the touch panel. However, a method of inspecting the conductive connection between the touch panel and the flexible substrate has not been invented. Therefore, even if the inspection of the electrode signal wiring of the touch panel is passed, but the conduction connection between the touch panel and the flexible substrate is poor, the touch panel may be provided even if an electrical signal is supplied from the motherboard. It is also impossible to accurately detect the coordinate position. Thus, it is desired to innovate an inspection method and a connection inspection device that confirm the conduction connection state between the touch panel and the flexible substrate.

Patent literature

Patent Document 1: JP-A-2013-033549

Patent Document 2: JP-A-2011-090358

The present invention has been made in view of such circumstances, and provides a connection inspection device for inspecting a conductive connection state between a touch panel and a flexible substrate electrically connected to the touch panel.

One aspect of the present invention provides a connection inspection device that performs connection inspection of a touch panel having a plurality of X-axis electrode wirings formed in the X-axis direction and a plurality of Ys formed in the Y-axis direction. a shaft electrode wiring, the touch panel further having a plurality of X-axis joint wirings extending from both ends of the X-axis electrode wiring and connected to the X-axis connecting portion, and extending from both ends of the Y-axis electrode wiring a plurality of Y-axis joint wirings connected to the Y-axis connection portion, the connection substrate having a first connection portion respectively connected to each of the X-axis connection portions and a second connection portion respectively connected to each of the Y-axis connection portions, The connection substrate further includes a plurality of third connection portions having a third connection portion that is connected to the first connection portion that is connected to the same X-axis electrode wire, and the same Y The second connection portions of the shaft electrode wiring are connected to each other a connected third connection portion, the connection inspection device having: a power supply unit that provides an alternating current signal for checking a connection state of the touch panel and the connection substrate; and a detection unit that detects from the inspection object when the power supply unit supplies an alternating current signal a detection unit that connects the upstream side of the power supply unit to a third connection portion that is connected to the electrode wiring formed in a given direction, and forms a downstream side of the power supply unit and is formed in the same direction a third connection portion connected to the other electrode wirings in the same direction is connected, the detection unit is connected to a third connection portion connected to the electrode wiring formed in a direction different from the given direction; and a determination unit The determination of the goodness of the electrode wiring in the different direction is performed based on the detection result of the detection unit when the connection unit is connected to the detection unit.

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

In one embodiment, in the case where the number of the third connection portion connected to the upstream side of the power supply unit and the third connection portion connected to the downstream side of the power supply unit are different, the detection is performed. As a result, when the output value of the electric power is affected by an electric signal supplied from a larger number of the third connection portions connected to the upstream side or the downstream side, the determination unit determines that the object is the inspection object. A connection portion and the X-axis connection portion or the second connection portion are well connected to the Y-axis connection portion.

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 invention, for example, terminals (third connection portions) connected to the two X-axis electrode wires are respectively selected from the substrates of the inspection object, and terminals connected to the Y-axis electrode wires are selected as connection inspection targets. At this time, a pair of X-axis electrode wirings are used as power supply electrodes to supply 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 for supplying the inspection signal and the terminal to be inspected from the terminal provided on the flexible substrate.

Further, since the number of the third connection portion connected to the upstream side and the third connection portion connected to the downstream side are the same, it is possible to determine that the connection state is good when the output value of the electrical signal detected from the inspection target becomes zero. Further, in the case where the output value of the detected electric signal is detected by the influence of the signal on the upstream side or the downstream side, the connection on the upstream side or the downstream side is good, and the connection on the downstream side or the upstream side is defective. .

Further, since the number of the third connection portion connected to the upstream side and the third connection portion connected to the downstream side are different, the inspection object is affected by the electric signal of the larger number of the upstream side or the downstream side. Therefore, if the connection of the inspection object is good, it will receive a larger number of parties. The manner in which the electrical signal is affected detects the electrical signal from the detection unit.

Further, by grounding the electrode wiring which is not used as the power supply electrode and the detection electrode, the influence of the AC signal supplied for inspection can be eliminated. Thereby, the connection state of the inspection object can be inspected with higher precision.

1‧‧‧Connection inspection device

2‧‧‧Power unit

3‧‧‧Detection unit

4‧‧‧ Connection unit

B‧‧‧Connecting substrate

B1‧‧‧First Connection

B2‧‧‧Second connection

B3‧‧‧ third connection

TP‧‧‧ touch panel

x‧‧‧X-axis electrode wiring

y‧‧‧Y-axis electrode wiring

1 is a schematic explanatory view of a touch panel and a connection substrate.

2 is a schematic configuration diagram showing a state in which a touch panel to which a connection board is connected is connected to the connection inspection device.

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

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

The best mode for carrying out the invention will be described. First, the touch panel and the connection substrate which are the object to be inspected by the connection inspection device of the present invention will be briefly described. The touch panel TP includes: an X-axis electrode wiring x (reference numerals x1 and x2 in FIG. 1), and a Y-axis electrode wiring y (reference numerals y1 and y2 in FIG. 1) crossing the X-axis electrode wiring x in the orthogonal direction. A plurality of X-axis electrode wirings x and Y-axis electrode wirings y form a sensor region 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 wiring through the X-axis electrode forming the sensor region The x and Y-axis electrode wirings y detect the touch position of the user in the sensor area, thereby functioning as an input terminal. The outline of the touch panel TP is shown in FIG. 1, and two of the X-axis electrode wiring x and the Y-axis electrode wiring y are drawn, respectively. The number of the strips is not particularly limited and depends on the size of the touch panel TP and the design of the manufacturer.

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

The X-axis connection portion and the Y-axis connection portion are electrically connected to a connection substrate B to be described later. As shown in FIG. 1, the X-axis connecting portion and the Y-axis connecting portion are formed side by side on the touch panel TP so as to be easily connected to the connection substrate B. Further, since the X-axis connecting portion is formed to extend from both ends of the X-axis electrode wiring x, two X-axis connecting portions are formed from one X-axis electrode wiring x. Similarly to the Y-axis connecting portion, two Y-axis connecting portions are formed with respect to one Y-axis electrode wiring y. In addition, since the connection substrate B to be 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 at positions not visible in FIG. 1, for example, on the connection substrate B. The back side of the first connecting portion B1.

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

The connection substrate 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 connecting portion B3 of B2. The third connection portion B3 is connected to an electrode pad such as a motherboard (not shown). Thereby, 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 connection board B shown in FIG. 1, the first connection portion B1 and the second connection portion B2 are arranged side by side along one side of the substrate, and the third connection portion B3 is arranged side by side along the side opposite to the side, but there is no Special restrictions. The above is the description of the touch panel TP and the connection substrate B to be inspected.

The connection inspection device 1 of the present invention can check the connection state of the touch panel TP and the connection substrate 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 in which the connection inspection device 1 is connected to the touch panel TP and the connection substrate B which are inspection objects.

The power supply unit 2 provides an alternating current signal for checking the connection state of the touch panel TP and the connection substrate B. The power unit 2 can be used to provide Current source for the stream signal. The power supply unit 2 can be configured using two AC power supplies 21 and 22 as shown in FIG. In the embodiment of Fig. 3, two identical AC power sources are connected in series, and their connection portions are grounded. By thus using the two AC power sources 21, 22, it is possible to provide a signal having a voltage having an opposite phase (phase different by 180 degrees) from one terminal and the other terminal of the power source unit 2. In addition, in this specification, for convenience of description, one terminal of the power supply unit 2 is referred to as an upstream side, and the other terminal is referred to as a downstream side.

The detecting unit 3 detects a detection signal from an inspection object as an object of the connection inspection when the power supply unit 2 supplies an alternating current signal for inspection. The detecting unit 3 is electrically connected to one of the third connecting portions B3. In this case, the third connecting portion B3 connected to the detecting unit 3 serves as an inspection target, 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 the Y-axis are inspected. The connection status of the connection.

The detection unit 3 can, for example, use a voltmeter or an ammeter. When detecting the detection signal, the detection unit 3 transmits the detection signal as information (for example, as a detection signal value) to a determination unit or a storage unit, which will be described later. Further, the detecting unit 3 detects a detection signal, and determines whether the connection state between the X-axis connecting portion and the first connecting portion B1 or the connection state between the Y-axis connecting portion and the second connecting portion B2 is good or bad based on the value of the detection signal. The details will be 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 detecting unit 3. The determination result of the determination unit determines the connection state between the X-axis connection portion and the first connection portion B1 or the connection state between the Y-axis connection portion and the second connection portion B2.

A specific determination method performed by the determination unit will be described. The determination method of the 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 to be described later.

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

The principle in which the determination unit can perform the determination as described above will be described. 3 is a schematic configuration diagram for explaining the principle of the case where the connection inspection device is used. In FIG. 3, the power supply unit 2 composed of two AC power supplies 21, 22 supplies an inspection signal to a given X-axis electrode wiring x1, x2, and checks the second connection portion B2 connected to the Y-axis electrode wiring y1. The connection status between. In the state shown in FIG. 3, the power unit 2 is The upstream side is connected to one third connection portion B3, and the downstream side of the power supply unit is connected to one third connection portion B3. Thereby, each of the third connection portions B3 connected to the upstream side and the downstream side is one and the same number. Further, in the embodiment of Fig. 3, the number of electrode wirings connected to the upstream side and the downstream side is one, but it may be two or more.

Although not illustrated in FIG. 3, the power supply unit 2 is controlled by the connection unit 4 such that the upstream side terminal is connected to a given X-axis wiring electrode x (X-axis wiring electrode shown by reference numeral x2 in the drawing), and The connection unit 4 controls the downstream terminal to be connected to an X-axis wiring electrode x (an X-axis wiring electrode indicated by reference numeral x1 in the drawing) other than the predetermined X-axis wiring electrode x. Further, the third connection portion B3 connected to the Y-axis electrode wiring y is connected to the detection unit 3.

In the case where 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 an inspection object, the X-axis electrode wiring x is used for the supply of the inspection signal. The two X-axis electrode wires x connected to the power supply unit 2 are not particularly limited, but preferably have a separation distance that is independent of the influence (interference) of the inspection signal.

Further, it is further preferred that the selected two X-axis electrode wirings have a separation distance equidistant from the center or equidistant from the end of the touch panel TP. This is for the purpose of easily calculating the calculation formula when the determination unit performs the calculation of the determination of whether the determination is good or not. In the case where the connection state between the X-axis connecting portion of the X-axis wiring electrode x and the first connecting portion B1 is an inspection object, the same application is applied to the Y-axis electrode wiring y.

As shown in FIG. 3, when two X-axis electrode wirings x1 and x2 are selected to provide an inspection signal, the Y-axis electrode wiring y1 is affected by the inspection signal from two X-axis electrode wirings x1 and x2 (electrostatic capacitance coupling). . Fig. 4 is an equivalent circuit based on the schematic configuration diagram of Fig. 3. As shown in FIG. 4, the power supply unit 2 is an AC power supply, and an inspection signal having a phase difference of 180 degrees is provided from both ends thereof.

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, the electrostatic capacitance coupling Cx1 is provided. Similarly, the X-axis electrode wiring x2 and the Y-axis electrode wiring y1 also have electrostatic capacitance coupling Cx2. Further, the Y-axis electrode wiring y1 can be considered by dividing the capacitive coupling portion into three resistors (resistor Ry1, resistor Ry2, and resistor Ry3) (refer to FIG. 4). As a feature of the touch panel TP, it is considered that the electrostatic capacitance coupling is substantially the same, and when the two X-axis electrode wirings x are separated by the above-described distance, the resistance Rx1 and the resistance Rx2 can be processed to be substantially equal.

In other words, in the third connection portion B3, when the connection to be inspected is good, the AC signal having a phase difference of 180 degrees is affected, and thus the influence of the AC signals is canceled. Thereby, the detection signal detected at the third connection portion B3 is detected as an output value of substantially zero.

When the connection state between the Y-axis connecting portion of the Y-axis electrode wiring y and the second connecting portion B2 is poor, the above-described equilibrium relationship is collapsed, and the third connecting portion B3 is affected by any one of the inspection signals. Thereby, the detecting unit 3 detects an output value having a given 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.

In the above-described determination method of the determination unit, one electrode wiring (X-axis electrode wiring x) is connected to each of the upstream side and the downstream side of the power supply unit 2, but it is not limited to one, and two or more types can be selected. Multiple. Even when 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 connection state is judged to be good or bad by the same principle as the above-described determination method.

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 from each other will be described. Further, in the above description, the case where the number of electrode wirings connected to the upstream side and the downstream side is the same is described. In this case, the fact that if the connection condition of the inspection article is good, the electrical signal detected from the electrode wiring of the inspection object cancels the electrical signal supplied from each electrode wiring, and the electrical signal detected from the electrode wiring of the inspection object. The output is zero.

In the case where the number of electrode wirings respectively connected to the upstream side and the downstream side is different, the electric 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 good/bad of the connection condition of the inspection object is determined by utilizing the bias of the supplied electrical 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 is affected by the electrical signals supplied from the three electrode wirings connected to the upstream side. ring. In other words, in consideration of the influence of the three electrode wirings on the upstream side and the two electrode wirings on the downstream side, the good electrode wiring is affected by the difference, that is, the one electrode wiring on the upstream side.

The electrode wirings respectively connected to the upstream side of the power supply unit 2 and the power supply unit 2 are connected in parallel. Thereby, the plurality of electrode wirings are respectively connected in series to the power supply unit 2. 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 to a given third connection portion B3. The connection unit 4 can utilize, for example, a switching element. By 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 side terminal of the power supply unit 2, a switching element for connecting to the downstream side terminal of the power supply unit 2, and a switching element for connection with the detecting unit 3. These are at least 3 switching elements. These switching elements are provided three with respect to each of the third connecting portions B3 so that the third connecting portion B3 can be connected and switched with any of the terminals.

In the case shown in FIG. 2, since four third connection portions B3 are provided, three switching elements for the third connection portions B3 are provided, and twelve switching elements are provided as a whole.

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

The connection unit 4 can also connect a ground portion (not shown) and an electrode wiring. The ground portion is connected to a so-called reference potential point, and is connected to the ground portion to become a reference potential. The ground portion may be connected to the two AC power sources described above. Further, it is also possible to set a third connection portion B3 (electrode wiring) connected to the upstream side and the downstream side of the power supply unit 2, and a third connection other than the third connection portion B3 (electrode wiring) connected to the detecting 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.

A control unit (not shown) controls the operations of the power supply unit 2, the detection unit 3, the determination unit, and the connection unit 4. The control unit transmits a signal for facilitating its operation to each unit in order to perform a connection check. Further, the connection inspection device 1 is provided with a storage unit (not shown), and stores information related to the inspection such as an inspection step, an inspection condition, and an inspection result.

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

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

In order to shorten the inspection time, it is also possible to first select the electrode wiring (axial electrode wiring) in one direction for power supply, sequentially perform the inspection of the electrode wiring in the other direction, and then, after the inspection of the electrode wiring in the other direction, the other The electrode wiring in one direction is selected for power supply, and the electrode wiring in one direction is sequentially inspected as an inspection object. Further, 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. Further, similarly to the wiring electrode connected to the ground portion, the control unit is electrically connected to the ground portion by using a switching element (not shown).

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

Next, the inspection method will be described using the connection inspection device 1. First, the touch panel TP to which the connection substrate B is connected is prepared to be inspected. In this case, the connection unit 4 connected to the third connection portion B3 is prepared corresponding to the number of the third connection portions B3 of the connection substrate B.

Next, the connection inspection device 1 and the connection substrate B are electrically connected. In this case, a case will be described in which one electrode wiring is connected to the upstream side and the downstream side. First, the X-axis electrode wiring x is an electric power supply electrode, and the Y-axis electrode wiring y for inspecting the connection state of the Y-axis connection portion and the second connection portion B2 is selected as an inspection target. At this time, the third connection portion to be connected to the first connection portion B1 connected to the X-axis electrode wiring x1 B3 is connected to the upstream terminal of the power supply unit 2. Further, 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 perform a given inspection, an inspection signal is supplied from the power supply unit 2. And, the detecting unit 3 performs detection of the detection signal. At this time, the detecting unit 3 transmits the detection result to the determination unit.

The determination unit determines the good/bad of the connection state based on the detection result. At this time, since the number of the third connection 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 or equal to (not substantially zero), it is determined that the connection state is defective.

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

After the connection inspection of the X-axis electrode wiring x and the Y-axis electrode wiring y is completed in the above-described order, the connection inspection is completed.

Further, when the number of the third connection portions B3 connected to the upstream side and the downstream side is different, if the connection state is good, a large number of electrode wirings which are strongly connected to the upstream side or the downstream side are detected. The electrical signal affected.

1‧‧‧Connection inspection device

2‧‧‧Power unit

3‧‧‧Detection unit

4‧‧‧ Connection unit

B‧‧‧Connecting substrate

B1‧‧‧First Connection

B2‧‧‧Second connection

B3‧‧‧ third connection

TP‧‧‧ touch panel

x‧‧‧X-axis electrode wiring

y‧‧‧Y-axis electrode wiring

Claims (4)

A connection inspection device for performing connection inspection of a touch panel having 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 touch panel The panel further has a plurality of X-axis joint wirings extending from both ends of the X-axis electrode wiring and connected to the X-axis connecting portion, and extending from both ends of the Y-axis electrode wiring and connected to the Y-axis connecting portion a plurality of Y-axis joint wirings, the connection substrate having a first connection portion respectively connected to each of the X-axis connection portions, and a second connection portion respectively connected to each of the Y-axis connection portions, the connection substrate further having a plurality of third connection portions having a third connection portion connected to the first connection portion that is connected to the same X-axis electrode wire, and a connection to the same Y-axis electrode line a third connecting portion of the second connecting portion connected to each other, the connection checking device having: a power supply unit that provides an alternating current signal for checking a connection state of the touch panel and the connecting substrate; and a detecting unit at the The source unit detects the detection signal from the inspection object when the AC signal is supplied; the connection unit connects the upstream side of the power supply unit to the third connection portion connected to the electrode wiring formed in the predetermined direction, and connects the power supply unit The downstream side is connected to a third connection portion formed by other electrode wirings formed in the same direction as the predetermined direction, and the inspection is performed. The measuring unit is connected to a third connecting portion connected to the electrode wiring formed in a direction different from the predetermined direction; and a determining unit that detects the detecting unit when connected to the detecting unit through the connecting unit As a result, the determination of the goodness of the electrode wiring in the different direction is performed. According to the connection inspection device of the first aspect of the invention, in the case where the third connection portion connected to the upstream side of the power supply unit and the third connection portion connected to the downstream side of the power supply unit are the same number, When the detection result is that the electric output value is substantially the same as zero, the determination unit determines that the first connection portion to be the inspection object is connected to the X-axis connection portion, or the second connection portion is connected to the Y-axis. The connection is good. The connection inspection device according to the first aspect of the invention, wherein the number of the third connection portion connected to the upstream side of the power supply unit and the third connection portion connected to the downstream side of the power supply unit are different When the detection result is that the output value of the electric power is affected by an electric signal supplied from a larger number of the third connection portions connected to the upstream side or the downstream side, the determination unit determines that the electric power is to be inspected. The first connecting portion of the article and the X-axis connecting portion or the second connecting portion are well connected to the Y-axis connecting portion. 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.