JP2006126618A - Display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display apparatus which can perform stable inspection relating to the quality and can suppress decrease in the production yield. <P>SOLUTION: The display apparatus includes an effective display unit comprising a plurality of display pixels, and further includes an inspection wiring 80 where an inspection signal is supplied on inspecting the effective display unit and with a conductive layer 90 disposed in the same layer as the inspection wiring 80 and opposing through a predetermined gap G to the inspection wiring 80. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device, and more particularly, to a display device including an inspection unit for performing an inspection related to quality.

  A display device such as a liquid crystal display device includes an effective display unit configured by matrix display pixels. The effective display section includes a plurality of scanning lines extending along the row direction of the display pixels, a plurality of signal lines extending along the column direction of the display pixels, and in the vicinity of an intersection between the scanning lines and the signal lines. A switching element arranged, a pixel electrode connected to the switching element, and the like are provided. Each of these scanning lines and each signal line is drawn out to the outer peripheral part of the effective display part.

In recent years, with the increase in the number of display pixels, various wirings such as scanning lines and signal lines are arranged so as to be adjacent to each other with a narrow line width and a slight interval in the effective display portion and the outer periphery thereof. For this reason, it is necessary to strictly inspect wiring defects such as a short circuit between wirings and disconnection of each wiring. For example, a method for inspecting a wiring defect by connecting an inspection control circuit to a liquid crystal display device and supplying signals having different phases to adjacent scanning lines has been proposed (for example, Patent Document 1). In addition, a liquid crystal display device having an inspection wiring on the outer peripheral portion of the effective display portion has also been proposed (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 06-160898 JP 2003-157053 A

  The present invention has been made in view of the above-described problems, and its purpose is to enable a stable inspection relating to quality, and a display capable of suppressing a decrease in manufacturing yield. To provide an apparatus.

A display device according to a first aspect of the present invention includes:
An effective display unit composed of a plurality of display pixels;
Inspection wiring to which an inspection signal is supplied when inspecting the effective display portion,
In the same layer as the inspection wiring, a conductive layer disposed to face the inspection wiring at a predetermined interval;
It is provided with.

A display device according to a second aspect of the present invention provides:
An effective display unit composed of a plurality of display pixels;
A wiring connected to the effective display unit and drawn out of the effective display unit;
A test drive wiring connected to the wiring via a switch element and supplied with a test drive signal when the effective display unit is tested;
An inspection control wiring to which an inspection control signal for controlling on / off of the switch element when the effective display portion is inspected is supplied;
In the same layer as the inspection control wiring, a conductive layer disposed so as to face the terminal portion of the inspection control wiring at a predetermined interval;
It is provided with.

  According to the present invention, it is possible to provide a display device that can stably perform quality-related inspections and can suppress a decrease in manufacturing yield.

  A display device according to an embodiment of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, a liquid crystal display device as an example of a display device includes a liquid crystal display panel 1 having a substantially rectangular flat plate shape. The liquid crystal display panel 1 is composed of a pair of substrates, that is, an array substrate 3 and a counter substrate 4, and a liquid crystal layer 5 held as a light modulation layer between the pair of substrates. The liquid crystal display panel 1 includes a rectangular effective display unit 6 for displaying an image. The effective display unit 6 is composed of a plurality of display pixels PX arranged in a matrix.

  The array substrate 3 includes wirings arranged in the effective display section 6, for example, a plurality of scanning lines Y (1, 2, 3,..., M) extending along the row direction of the display pixels PX, and the display pixels PX. A plurality of signal lines X (1, 2, 3,..., N) extending along the column direction are provided. In addition, in the effective display portion 6, the array substrate 3 has a switching element 7 and a switching element 7 arranged for each display pixel PX in the vicinity of the intersection between the scanning lines Y and the signal lines X in addition to these various wirings. The pixel electrode 8 etc. connected to are provided.

  The switching element 7 is composed of a thin film transistor (TFT) or the like. The gate electrode 7G of the switching element 7 is electrically connected to the corresponding scanning line Y (or formed integrally with the scanning line). The source electrode 7S of the switching element 7 is electrically connected to the corresponding signal line X (or formed integrally with the signal line). The drain electrode 7D of the switching element 7 is electrically connected to the pixel electrode 8 of the corresponding display pixel PX.

  The counter substrate 4 includes a counter electrode 9 and the like common to all the display pixels PX in the effective display unit 6. The array substrate 3 and the counter substrate 4 are disposed with the pixel electrodes 8 and the counter electrodes 9 of all the display pixels PX facing each other, and a gap is formed between them. The liquid crystal layer 5 is formed of a liquid crystal composition sealed in the gap between the array substrate 3 and the counter substrate 4.

  In a color display type liquid crystal display device, the liquid crystal display panel 1 includes a plurality of types of display pixels, for example, a red pixel that displays red (R), a green pixel that displays green (G), and a blue that displays blue (B). Has pixels. That is, the red pixel includes a red color filter that transmits light having a red main wavelength. The green pixel includes a green color filter that transmits light having a green dominant wavelength. The blue pixel includes a blue color filter that transmits light having a blue main wavelength. These color filters are arranged on the main surface of the array substrate 3 or the counter substrate 4.

  The liquid crystal display panel 1 includes a drive IC chip 11 disposed on an outer peripheral portion 10 located outside the effective display portion 6. In the example shown in FIG. 1, the driving IC chip 11 is disposed on the extending portion 10 </ b> A of the array substrate 3 that extends outward from the end portion 4 </ b> A of the counter substrate 4. Further, the liquid crystal display panel 1 includes a connection pad portion PP to which a flexible wiring board FPC having a drive circuit for supplying a drive signal to the effective display portion 6 can be connected. In the example shown in FIG. 1, the connection pad portion PP is formed on the extending portion 10 </ b> A similarly to the drive IC chip 11.

  The driving IC chip 11 mounted on the liquid crystal display panel 1 includes a signal line driving unit 11X that supplies a driving signal (video signal) to each signal line X of the effective display unit 6, and each scanning line Y of the effective display unit 6. And a scanning line driving unit 11Y for supplying a driving signal (scanning signal). The scanning line drive unit 11Y outputs a drive signal to the odd-numbered scanning lines Y (1, 3, 5,...) And the even-numbered scanning lines Y (2, 4, 6,...). ) Includes a second drive unit 11Y2 that outputs a drive signal. The first drive unit 11Y1 and the second drive unit 11Y2 are respectively disposed on both sides of the signal line drive unit 11X.

  The first drive unit 11Y1 is electrically connected to the odd-numbered scanning lines Y (1, 3, 5,...) Via the odd-numbered wiring group 20 disposed on the one end side 10B of the outer peripheral part 10. The odd-numbered wiring group 20 is configured by wirings W (1, 3, 5,...) Connected to the odd-numbered scanning lines Y (1, 3, 5,...). That is, the drive signal output from the first drive unit 11Y1 is supplied to the corresponding odd-numbered scanning line Y (1, 3, 5,...) Via each wiring W (1, 3, 5,...) The display pixels PX in the odd rows are turned on / off. That is, the switching elements 7 included in each odd-numbered display pixel PX are on / off controlled based on the driving signal supplied from the corresponding scanning line Y.

  The second drive unit 11Y2 is electrically connected to the even-numbered scanning lines Y (2, 4, 6,...) Via the even-numbered wiring group 30 disposed on the other end side 10C of the outer peripheral portion 10. The even-numbered wiring group 30 is configured by wirings W (2, 4, 6,...) Connected to the even-numbered scanning lines Y (2, 4, 6,...). That is, the driving signal output from the second driving unit 11Y2 is supplied to the corresponding even-numbered scanning line Y (2, 4, 6,...) Via each wiring W (2, 4, 6,...) The display pixels PX in even-numbered rows are turned on / off. In other words, the switching elements 7 included in each display pixel PX in the even-numbered row are on / off controlled based on the drive signal supplied from the corresponding scanning line Y.

  As shown in FIG. 2, the array substrate 3 has an effective display such as a wiring defect in the odd-numbered wiring group 20, a wiring defect in the even-numbered wiring group 30, a wiring defect in the effective display unit 6, and a display quality of the display pixel PX. An inspection unit 40 for performing an inspection related to quality in the unit 6 is provided. The inspection unit 40 includes a signal line inspection unit 41 provided corresponding to the signal line driving unit 11X, a first scanning line inspection unit 42 provided corresponding to the first driving unit 11Y1 of the scanning line driving unit 11Y, A second scanning line inspection unit 43 provided corresponding to the second drive unit 11Y2 and a pad unit 44 for inputting inspection signals to the inspection units 41, 42, 43 are provided.

  The signal line inspection section 41 is provided with a signal line inspection drive wiring 51 connected to each signal line X while being supplied with an inspection drive signal when inspecting the effective display section 6. The signal line inspection unit 41 includes a switch element 61 between each signal line X (1, 2,..., N) and the signal line inspection drive wiring 51. Further, the signal line inspection unit 41 includes an inspection control wiring 55 to which an inspection control signal for controlling on / off of the switch element 61 when the effective display unit 6 is inspected is supplied. That is, the signal line inspection drive wiring 51 and the inspection control wiring 55 function as inspection wirings to which an inspection signal is supplied when the signal line inspection section 41 inspects the effective display section 6.

  The switch element 61 is composed of, for example, a thin film transistor. The gate electrode 61G of each switch element 61 is electrically connected to the inspection control wiring 55. The source electrode 61S of each switch element 61 is electrically connected to the signal line inspection drive wiring 51. Further, the drain electrode 61D of each switch element 61 is electrically connected to the corresponding signal line X.

  The first scanning line inspection unit 42 is supplied with a driving signal for inspection when the effective display unit 6 is inspected, and is connected to each wiring 21 of the odd-numbered wiring group 20, for example, the wirings W1, W3, W5. A first inspection drive wiring 52 is provided. Further, the first scanning line inspection unit 42 includes a switch element 62 between each wiring 21 and the first inspection driving wiring 52. Further, the first scanning line inspection unit 42 includes an inspection control wiring 55 to which an inspection control signal for controlling on / off of the switch element 62 when the effective display unit 6 is inspected is supplied. The inspection control wiring 55 is common to the signal line inspection unit 41. That is, the first inspection drive wiring 52 and the inspection control wiring 55 function as inspection wirings to which an inspection signal is supplied when the effective display unit 6 is inspected in the first scanning line inspection unit 42.

  The switch element 62 is composed of, for example, a thin film transistor. The gate electrode 62G of each switch element 62 is electrically connected to the inspection control wiring 55. The source electrode 62S of each switch element 62 is electrically connected to the first inspection drive wiring 52. Further, the drain electrode 62 </ b> D of each switch element 62 is electrically connected to the corresponding wiring 21.

  The second scanning line inspection unit 43 is supplied with a driving signal for inspection when inspecting the effective display unit 6 and is connected to each wiring 31 of the even-numbered wiring group 30, for example, the wirings W2, W4, W6,. A second inspection drive wiring 53 is provided. The second scanning line inspection unit 43 includes a switch element 63 between each wiring 31 and the second inspection driving wiring 53. Further, the second scanning line inspection unit 43 includes an inspection control wiring 55 to which an inspection control signal for controlling on / off of the switch element 63 is supplied when the effective display unit 6 is inspected. The inspection control wiring 55 is common to the signal line inspection unit 41. That is, the second inspection drive wiring 53 and the inspection control wiring 55 function as inspection wirings to which an inspection signal is supplied when the effective display unit 6 is inspected in the second scanning line inspection unit 43.

  The switch element 63 is composed of, for example, a thin film transistor. The gate electrode 63G of each switch element 63 is electrically connected to the inspection control wiring 55. The source electrode 63S of each switch element 63 is electrically connected to the second inspection drive wiring 53. Further, the drain electrode 63 </ b> D of each switch element 63 is electrically connected to the corresponding wiring 31.

  The pad portion 44 has an input pad 71 that enables input of an inspection drive signal at one end portion of the signal line inspection drive wiring 51, and an inspection drive signal input at one end portion of the first inspection drive wiring 52. An input pad 72 to be enabled, an input pad 73 to enable input of an inspection drive signal to one end portion of the second inspection drive wiring 53, and an inspection control signal to one end portion of the inspection control wiring 55 An input pad 75 that enables input is provided.

  The drive signal input from the input pad 71 is an inspection signal written to the pixel electrode 8 of each display pixel PX in the inspection stage. The drive signals input from the input pads 72 and 73 are inspection signals for controlling on / off of the switching elements 7 of the display pixels PX in the inspection stage. The control signals input from the input pad 75 are, in the inspection stage, the switch element 61 of the signal line inspection unit 41, the switch element 62 of the first scanning line inspection unit 42, and the switch element 63 of the second scanning line inspection unit 43. This is an inspection signal for controlling ON / OFF of the signal.

  Each signal line X (1, 2,... N), each wiring 21 of the odd-numbered wiring group 20 and each wiring 31 of the even-numbered wiring group 30 can be connected to the driving IC chip 11 in the middle. The connection pad PD is provided.

  In the display device having the above-described configuration, electric charges charged during the manufacturing process are likely to accumulate in a wiring having a relatively large installation area. In particular, a common potential is supplied to all display pixels PX to the signal line inspection drive wiring 51, the first inspection drive wiring 52, the second inspection drive wiring 53, the inspection control wiring 55, or the counter electrode 9. Inspection wiring such as common wiring (not shown) has a wide line width and a long wiring length, so that the installation area is large and charges are easily charged. The charged electric charge tends to concentrate on the terminal end portion and the bent portion of the wiring, and causes electrostatic discharge between other adjacent conductive layers (wiring, electrodes, etc.). Such electrostatic discharge may cause a short circuit between adjacent wirings that should be kept in an insulated state or disconnection of the adjacent wirings.

  For example, as shown in FIG. 3, in the switch element 63 positioned near the terminal end of the inspection control wiring 55, the semiconductor layer 63SC is electrically connected to the source electrode 63S and the drain electrode 63D. In such a configuration, when the inspection control wiring 55 is charged, the charge is likely to be concentrated on the gate electrode 63G of the switch element 63 corresponding to the terminal portion, and between the gate electrode 63G and the source electrode 63S or between the gate electrode 63S. There is a possibility of causing a short circuit between 63G and the drain electrode 63D.

  In addition, as shown in FIG. 4, when the common wiring COM is charged, the charge is likely to concentrate on the bent portion BD, and a short circuit is caused between the wiring WX to which another potential is supplied and the bent portion BD. May cause. Further, when the scale of the discharge is large, there is a possibility that the adjacent wiring WX may be disconnected. Such a wiring defect such as a short circuit or disconnection causes a pixel defect in the completed liquid crystal display panel, thereby reducing the manufacturing yield.

  Therefore, in the display device according to this embodiment, as shown in FIGS. 5A and 5B, the display device is disposed in the same layer as the inspection wiring 80 so as to face the inspection wiring 80 with a predetermined interval. A conductive layer 90 is provided.

  Since the conductive layer 90 is disposed in the same layer as the inspection wiring 80, it can be formed in the same process using the same material as the inspection wiring 80. This eliminates the need for a separate step of forming the conductive layer 90, and does not cause an increase in manufacturing cost or a significant deterioration in manufacturing yield.

  The conductive layer 90 induces the discharge of electric charges concentrated on the inspection wiring 80, and even if a discharge occurs (or even if a short circuit or a disconnection occurs as a result of the discharge), the completed liquid crystal display It is a conductive layer that has no effect on the panel. For example, the conductive layer 90 may be a conductive member disposed in an island shape (that is, in an electrically floating state) facing the inspection wiring 80, and supplies a predetermined signal (or a predetermined voltage). For example, the wiring may be used. When the conductive layer 90 is a wiring, it is desirable to use a wiring that does not receive a signal that contributes to display in the completed liquid crystal display panel as the conductive layer 90. That is, for the wiring used as the conductive layer 90, no signal is input after the flexible wiring board FPC is mounted, or the signal fixed with the switch elements 61, 62, 63 provided in the inspection unit 40 turned off. It is desirable that the wiring is input. By using such a wiring or island-shaped conductive member as the conductive layer 90, even if the wiring is short-circuited with the inspection wiring 80, the display quality is not affected at all in the completed liquid crystal display panel. In addition, when the conductive layer 90 is a wiring, a signal that contributes to display is input if it can be suppressed to a small-scale discharge that releases the charge of the inspection wiring 80 without causing a short circuit or disconnection. A wiring may be used as the conductive layer 90.

  Further, the predetermined gap G between the inspection wiring 80 and the conductive layer 90 is a distance capable of inducing discharge and is desirably as small as possible, but they are short-circuited (the gap is set to zero). Since the resistance becomes too small and the energy of electrostatic breakdown cannot be consumed, a distance is required so that both are electrically insulated.

  The pattern combination when the facing portion 80A of the inspection wiring 80 and the facing portion 90A of the conductive layer 90 face each other is not limited to the combination of the rectangular facing portions as shown in FIG. 5A. . That is, the facing portion 80A of the inspection wiring 80 facing the conductive layer 90 and the facing portion 90A of the conductive layer 90 facing the inspection wiring 80 may be rectangular as shown in FIG. 5A. However, it is desirable to have a shape that tends to concentrate charges (that is, a sharp shape).

  For example, it is desirable that the facing portion 80 </ b> A of the inspection wiring 80 has a protruding corner portion protruding toward the conductive layer 90. Similarly, it is desirable that the facing portion 90 </ b> A of the conductive layer 90 has a protruding corner portion protruding toward the inspection wiring 80. In the example shown in FIG. 6A, a configuration in which the facing portions 80A and 90A have triangular projecting angle portions (that is, a single apex angle T) is illustrated. Further, in the example shown in FIG. 6B, a configuration in which the facing portions 80A and 90A have sawtooth-shaped projecting angle portions (that is, a plurality of apex angles T) formed of continuous triangles is illustrated. As shown in FIGS. 6A and 6B, when the facing portion has a projecting angle portion, the predetermined interval G is the distance between the tip of the projecting angle portion (that is, the apex angle T) and the facing portion facing this. Corresponding to

  As shown in FIG. 7A, when the inspection wiring 80 and the conductive layer 90 are faced to each other, one opposing portion is rectangular and the other opposing portion is a triangular protrusion. There may be. Further, as shown in FIG. 7B, when the inspection wiring 80 and the conductive layer 90 are faced to each other, one opposing portion is rectangular and the other opposing portion is a sawtooth-shaped protrusion. It may be a combination. Further, as shown in FIG. 7C, when the inspection wiring 80 and the conductive layer 90 face each other, one opposing portion is triangular and the other opposing portion is a triangular projecting angle portion. Although it may be a combination, it is more desirable that the apex angle T of one opposing portion opposes the apex angle T of the other opposing portion at the shortest distance. Furthermore, as shown in FIG. 7D, when the inspection wiring 80 and the conductive layer 90 face each other, one opposing portion has a sawtooth shape and the other opposing portion has a sawtooth-shaped projecting angle portion. However, it is more desirable that the apex angle T of one opposing portion is opposed to the apex angle T of the other opposing portion at the shortest distance.

  With such a configuration, the charge accumulated on the inspection wiring 80 can be released by discharging with the conductive layer 90. As a result, it is possible to prevent undesired discharges between other conductive layers adjacent to the inspection wiring 80 and undesired short-circuits and disconnections due to the discharges.

  Therefore, in the inspection stage in which the inspection relating to the quality in the effective display unit 6 before mounting the flexible wiring board FPC and the driving IC chip 11 is performed, the wiring unit is stably inspected for wiring defects using the inspection unit 40. In addition, it is possible to prevent occurrence of defects in the completed liquid crystal display panel, and to suppress a decrease in manufacturing yield.

(Example)
In this embodiment, a configuration example for inducing discharge at the terminal end of the inspection control wiring 55 will be described. As shown in FIGS. 8A and 8B, in the same layer as the inspection control wiring 55 integrated with the gate electrode 63G of the switch element 63, the end portion 55E of the inspection control wiring 55 is a conductive layer with a predetermined interval. It is arranged so as to face 90. The terminal portion 55 </ b> E facing the conductive layer 90 of the inspection control wiring 55 has a protruding corner portion protruding toward the conductive layer 90. Further, the facing portion 90 </ b> A of the conductive layer 90 that faces the inspection control wiring 55 has a protruding portion that protrudes toward the inspection control wiring 55.

  With such a configuration, the charges concentrated on the terminal end portion 55E of the inspection control wiring 55 can be released by discharging with the conductive layer 90. As a result, it is possible to prevent an undesired discharge near the terminal end of the inspection control wiring 55 and an undesired short circuit or disconnection due to the discharge.

  As described above, according to the display device according to the present embodiment, in the array substrate including the inspection unit, the inspection wiring has the conductive layer disposed so as to face the portion where charges are likely to concentrate. It becomes possible to induce discharge. As a result, it is possible to prevent the concentration of electric charges that increase the discharge scale on the inspection wiring. For this reason, it becomes possible to suppress the occurrence of an undesired discharge with another conductive layer close to the inspection wiring and the occurrence of a wiring defect due to this discharge.

  For this reason, in the inspection stage before mounting a drive IC chip, a flexible wiring board, etc., it becomes possible to carry out the inspection relating to the quality of the effective display section stably using the inspection section. Therefore, it is possible to prevent the wiring failure from flowing out to the subsequent process. In addition, it is possible to prevent the occurrence of defects in the completed liquid crystal display panel. As a result, it is possible to suppress a decrease in manufacturing yield.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the gist of the invention in the stage of implementation. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

  For example, in the above embodiment, the liquid crystal display panel configured to supply the scanning signal from both sides of the liquid crystal display panel has been described. However, the number of wirings for supplying the scanning signal is different between the first driving unit and the second driving unit. Alternatively, the layout may be such that the scanning signal is supplied to each scanning line only from one side by a single scanning line driving unit without the first driving unit or the second driving unit, and conversely the scanning line driving unit. However, the configuration may further include a third drive unit and a fourth drive unit.

  The display device of the present invention is not limited to the liquid crystal display device described above, and may be another display device such as an organic electroluminescence display device using a self-luminous element as a display element.

FIG. 1 schematically shows a configuration of a liquid crystal display panel of a liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a diagram schematically showing the configuration of the inspection unit of the liquid crystal display panel shown in FIG. FIG. 3 is a diagram for explaining the occurrence of a short circuit due to the discharge at the switch element located near the terminal end of the inspection control wiring. FIG. 4 is a diagram for explaining the occurrence of disconnection due to the discharge near the bent portion of the common wiring. FIG. 5A is a plan view schematically showing an arrangement example of the inspection wiring and the conductive layer opposed to the inspection wiring. FIG. 5B is a cross-sectional view schematically showing a cross-sectional structure when the inspection wiring and the conductive layer shown in FIG. 5A are cut along the A-A ′ line. FIG. 6A is a plan view schematically showing a shape example of opposing portions of the inspection wiring and the conductive layer. FIG. 6B is a plan view schematically showing an example of the shape of the opposing portion of the inspection wiring and the conductive layer. FIG. 7A is a plan view showing a pattern combination example when the inspection wiring and the conductive layer face each other. FIG. 7B is a plan view showing a pattern combination example when the inspection wiring and the conductive layer face each other. FIG. 7C is a plan view showing a pattern combination example when the inspection wiring and the conductive layer face each other. FIG. 7D is a plan view showing a pattern combination example when the inspection wiring and the conductive layer face each other. FIG. 8A is a plan view schematically illustrating an arrangement of the inspection control wiring and the conductive layer facing the inspection control wiring according to the embodiment. 8B is a cross-sectional view schematically showing a cross-sectional structure when the inspection control wiring and the conductive layer shown in FIG. 8A are cut along a B-B ′ line.

Explanation of symbols

  PX ... display pixel, FPC ... flexible wiring board, PP ... connection pad part, 1 ... liquid crystal display panel, 3 ... array substrate, 6 ... effective display part, 10 ... outer peripheral part, 10A ... extension part, 11 ... driving IC chip , 20 ... odd number wiring group, 21 ... wiring, 30 ... even number wiring group, 31 ... wiring, 40 ... inspection section, 41 ... signal line inspection section, 42 ... first scanning line inspection section, 43 ... second scanning line Inspection part 44 ... Pad part 51 ... Signal line inspection drive wiring 52 ... First inspection drive wiring 53 ... Second inspection drive wiring 55 ... Inspection control wiring 61 ... Switch element 61G ... Gate Electrode 62 ... Switch element 62G ... Gate electrode 63 ... Switch element 63G ... Gate electrode

Claims (12)

An effective display unit composed of a plurality of display pixels;
Inspection wiring to which an inspection signal is supplied when inspecting the effective display portion,
In the same layer as the inspection wiring, a conductive layer disposed to face the inspection wiring at a predetermined interval;
A display device comprising:   2. The display device according to claim 1, wherein a facing portion of the conductive layer facing the inspection wiring has a projecting angle portion protruding toward the inspection wiring.   2. The display device according to claim 1, wherein a facing portion of the inspection wiring facing the conductive layer has a projecting angle portion protruding toward the conductive layer.   The display device according to claim 1, wherein the inspection wiring is a wiring for supplying a common potential to a plurality of display pixels in the effective display portion. An effective display unit composed of a plurality of display pixels;
A wiring connected to the effective display unit and drawn out of the effective display unit;
A test drive wiring connected to the wiring via a switch element and supplied with a test drive signal when the effective display unit is tested;
An inspection control wiring to which an inspection control signal for controlling on / off of the switch element when the effective display portion is inspected is supplied;
In the same layer as the inspection control wiring, a conductive layer disposed so as to face the terminal portion of the inspection control wiring at a predetermined interval;
A display device comprising:   The display device according to claim 5, wherein a facing portion of the conductive layer facing the inspection control wiring has a projecting corner portion protruding toward the inspection control wiring.   The display device according to claim 5, wherein a terminal portion of the inspection control wiring facing the conductive layer has a projecting angle portion protruding toward the conductive layer.   The display device according to claim 5, wherein the wiring is at least one of a scanning line and a signal line.   The display device according to claim 5, wherein the switch element is a thin film transistor, and a gate electrode of the switch element is connected to the control wiring for inspection.   The display device according to claim 1, wherein the conductive layer is a conductive member arranged in an island shape.   The display device according to claim 1, wherein the conductive layer is a wiring capable of supplying a signal.   The display device according to claim 1, wherein the effective display unit is provided in a liquid crystal display panel configured by holding a liquid crystal layer between a pair of substrates.

Images