JPH11316389A - Arrayed substrate and liquid crystal display device, and manufacturing method of liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to improve productivity as much as possible. SOLUTION: This liquid crystal display device is characterized in being provided with a transparent insulating substrate 10; plural scanning lines 12 formed on this insulating substrate; plural signal lines 14 formed on the insulating substrate so as to intersect the scanning lines; pixel electrodes 18 formed at every intersection of the scanning lines and the signal lines; switching elements 16 which are arranged corresponding to each pixel electrode and send out signals from the corresponding signal lines to the pixel electrodes according to voltages of the corresponding scanning lines; a scanning line drive circuit 20 which is formed on the insulating substrate and drives the plural scanning lines; a signal line drive circuit 22 which is formed on the insulating substrate and drives plural signal lines; a 1st terminal group 24 which is formed on the insulating substrate and inputs external signals to the scanning lines; and a 2nd terminal group 26 which is formed on the insulating substrate and external signal to the signal lines.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an active matrix type liquid crystal display device.

[0002]

2. Description of the Related Art In recent years, an active matrix type liquid crystal display device has been used as a flat panel display. Among them, a pixel and a switching element (T) provided in a region serving as a display portion on a transparent substrate (glass substrate) are used because a manufacturing cost can be reduced.
An active matrix type liquid crystal display device integrated with a driving circuit in which an FT element) and a driving circuit for driving a scanning line or a signal line are integrally formed is often used.

FIG. 17 shows a configuration of a conventional active matrix type liquid crystal display device in which a drive circuit is integrally formed. This conventional liquid crystal display device has a structure in which a liquid crystal layer (not shown) is sandwiched between an array substrate 1 and a counter substrate 6 having a counter electrode (not shown) by using a sealing material 7. . The array substrate 1 includes a plurality of scanning lines 12, a plurality of signal lines 14 formed to intersect these scanning lines, a switching element (TFT element) 16 formed at each intersection thereof, and a pixel electrode 18. A display unit 19 having
A scanning line driving circuit 20 for driving the plurality of scanning lines 12 and a signal line driving circuit 22 for driving the signal lines so as to sequentially transmit video signals to the plurality of signal lines are provided.

The TFT elements 16 and the pixel electrodes 18 are formed on the display section 19 of the array substrate 1, while the scanning line drive circuit 20 and the signal line drive circuit 22 are formed outside the display section 19.

The scanning line driving circuit 20 includes a shift register 20
a and a buffer circuit 20b. The signal line driving circuit 22 includes a shift register 22a and a video bus line 22b for transmitting a video signal to the signal line 14.
And turned on / off based on a control signal from the shift register 22a for each signal line.
and a plurality of switch elements 22c for supplying the video signal from b to a corresponding signal line.

[0006]

The integrated liquid crystal display device in which the driving circuit is formed on the glass substrate has advantages such as reduction in size of the liquid crystal display device and cost reduction by saving steps. However, in the inspection process of the liquid crystal display device integrated with the driving circuit, when a display defect such as unevenness occurs on the display screen, the display unit 19 is defective or the scanning line driving circuit 20 or the signal line driving circuit There is a problem that it is difficult to determine whether 22 is defective. If only the integrated drive circuit is defective,
Since the liquid crystal display device also becomes defective, there is a problem that productivity is poor.

The present invention has been made in view of the above circumstances, and a first object is to provide an array substrate capable of improving productivity, a liquid crystal display device using the array substrate, and a method of manufacturing the same. Accordingly, a second object is to provide an array substrate and a liquid crystal display device that can easily determine whether the cause of a defect is on the display unit or on the driving side.

[0008]

According to a first aspect of the present invention, there is provided an array substrate comprising: an insulating substrate; a plurality of scanning lines formed on the insulating substrate; A plurality of signal lines formed so as to intersect, a pixel electrode formed at each intersection of the scanning line and the signal line, and provided corresponding to each pixel electrode, a voltage of a corresponding scanning line is provided. A switching element that transmits a signal from a corresponding signal line to the pixel electrode based on the scanning line driving circuit that is formed on the insulating substrate and drives the plurality of scanning lines; A signal line driving circuit formed to drive the plurality of signal lines; and a first signal line driving circuit formed on the insulating substrate for externally supplying a signal to the scanning line.
And a second group of terminals formed on the insulating substrate for externally supplying a signal to the signal line.

In the array substrate thus configured, after inspecting the array substrate, if there is no defective portion, the insulating substrate is cut so as to separate the first and second terminal groups from the pixel portion. Thereby, it can be used as an array substrate of a liquid crystal display device integrated with a driving circuit. Further, when a defect is invented only in the scanning line driver circuit or the signal line driver circuit, the insulating substrate is cut so as to separate these driver circuits from the pixel portion, and the first and second terminal groups are externally connected. If the mounting drive circuit is connected, it can be used as an array substrate of a liquid crystal display device having an external driving circuit. As a result, the number of defective array substrates can be reduced, and the productivity can be greatly improved.

According to a second aspect of the array substrate according to the present invention, there is provided a transparent insulating substrate, a plurality of scanning lines formed on the insulating substrate, and a plurality of scanning lines on the insulating substrate intersecting the scanning lines. A plurality of formed signal lines, a pixel electrode formed at each intersection of the scanning line and the signal line, provided corresponding to each pixel electrode, based on a voltage of a corresponding scanning line, A switching element that sends a signal from the signal line to the pixel electrode to the pixel electrode; and a scanning line driving circuit that is formed on the insulating substrate and drives the plurality of scanning lines.
A signal line driving circuit formed on the insulating substrate to drive the plurality of signal lines; and a scanning line analog formed on the insulating substrate to apply an external signal to each of the plurality of scanning lines. A switch circuit; and a signal line analog switch circuit formed on the insulating substrate for externally supplying a signal to each of the plurality of signal lines.

In the array substrate of the second aspect,
A scanning line driving circuit and a signal line are provided by including a scanning line analog switch circuit for externally supplying a signal to each scanning line and a signal line analog switching circuit for externally supplying a signal to each signal line. The drive circuit and the display unit such as the pixel electrode can be separated and inspected, and it is possible to determine whether the cause of the defect is either.

In a third aspect of the array substrate according to the present invention, in the array substrate according to the first aspect, the array substrate is provided for each of the plurality of scanning lines, and is provided from the scanning line driving circuit based on an external control signal. A plurality of switch elements for turning on / off a drive signal transmitted to the scanning line are further provided.

According to the array substrate of the third aspect, the drive signal transmitted from the scan line drive circuit to the scan line can be turned on / off by a plurality of switch elements based on an external control signal. Become. For this reason, it is possible to perform inspection while separating the driving circuit from the display unit such as the pixel electrode, and it is possible to determine which of the causes of the defect is present.

If a liquid crystal display device is constructed using the array substrate according to the second or third aspect, it is possible to determine whether the cause of the defect is the drive circuit or the display unit.

[0015]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of the first embodiment of the present invention. The first embodiment is an array substrate 1,
The array substrate 1 has a configuration in which a plurality of scanning lines 12 and a plurality of signal lines 14 are arranged on a glass substrate 10 so as to intersect with each other via an insulating film (not shown). At the intersection of each scanning line 12 and each signal line 14, a TFT (Th
in Film Transistor) element 16 and this TFT element 16
And a pixel electrode 18 connected to the pixel electrode 18. In addition,
The gate of the TFT element 16 is connected to the corresponding scanning line 12, one end of the TFT element 16 is connected to the corresponding signal line 14, and the other end is connected to the pixel electrode 18. The TFT element 16 and the pixel electrode 18 constitute a screen display unit 19.

A scanning line driving circuit 20 for driving the scanning lines 12 is provided at one end of each scanning line 12, and a signal for driving the scanning lines 12 is applied to the other end from the outside. Pad 24 is provided.

A signal line drive circuit 22 for driving these signal lines is provided at one end of each signal line 14, and a signal for driving the signal lines 14 is applied to the other end from the outside. Pads 26 are provided.

That is, the scanning line drive circuit 20 and the pad 24, and the signal line drive circuit 22 and the pad 26 are formed on the glass substrate 10 integrally with the screen display unit 19. Further, scribe lines 28 and 30 are provided on the array substrate 1.

In the array substrate thus configured, the quality of the scanning line driving circuit 20 and the signal line driving circuit 22 is finally inspected. If no defect is found in the scanning line driving circuit 20 and the signal line driving circuit 22, the array substrate 1 is moved to the opposite substrate 40 as shown in FIG.
Then, the liquid crystal layer 42 is sealed between these substrates. Note that reference numeral 3 shown in FIG.
Reference numeral 8 denotes a pixel electrode and a drive wiring. Thereafter, the external drive circuit pads 24 and 26 are cut off from the screen display 19 by cutting along the scribe line 28. At this time, the scanning lines 12 and the signal lines 14 may be short-circuited by scribing as shown in FIG. Therefore, the scanning lines 12 and the signal lines 14 near the screen display unit 19 as viewed from the scribe line 28 are cut using, for example, a YAG laser having a wavelength of 1.06 μm. This cut area is indicated by reference numeral 36 in FIG. Thus, the pad portions 24 and 26 are separated from the screen display portion 19 without short-circuiting the scanning lines 12 and the signal lines 14. In this case, the screen display unit 19 is driven by the scanning line driving circuit 20 and the signal line driving circuit 22.

If a defect is found in the scanning line drive circuit 20 and the signal line drive circuit 22 in the above-described array substrate inspection step, the array substrate 1 is bonded to the opposing substrate and the liquid crystal layer is sealed. By cutting along the scribe line 30, the scanning line driving circuit 20 and the signal line driving circuit 22 are separated from the screen display unit 19. At this time, the scanning lines 12 and the signal lines near the screen display section 19 viewed from the scribe line 30 are cut using a YAG laser having a wavelength of 1.06 μm, for example, as described above. Then, as shown in FIG.
An external scanning line driving circuit 52 is connected via a pe-automated bonding (48), and a TAB is connected to the pad 26.
49, an external signal line drive circuit 54 is connected via
The liquid crystal display device is driven by applying a drive signal from outside.

As described above, the array substrate of the present embodiment can be used as a substrate having a built-in drive circuit when the scan line drive circuit 20 and the signal line drive circuit 22 operate normally. . When the screen display section 19 is normal and the scanning line driving circuit 20 and the signal line driving circuit 32 are defective, the external driving circuit and the pads 24 and 26 are connected via TAB. Thus, the array substrate can be used as a product, and the productivity can be improved.

In the above-described embodiment, in order to prevent a short circuit due to scribing from occurring on the scanning line and the signal line, for example, a YAG laser having a wavelength of 1.06 μm is used to scan the scanning line and the signal near the scribe line. Although the line is cut, a YAG laser having a wavelength of 0.532 μm may be used. It should be noted that the YAG laser is small and can obtain a stable high-output beam.

In the array substrate of the present embodiment, the pads 24 and 26 are directly connected to the scanning line driving circuit 20 and the signal line driving circuit 22 via the scanning lines 12 and the signal lines 14, respectively. At 24 and 26, by measuring signals, the operation status of the scanning line driving circuit 20, the signal line driving circuit 22, the operation stop portion of the driving circuits 20 and 22, the short-circuiting of the scanning line 12 and the signal line 14, the disconnection, etc. Can be easily inspected.

Next, the configuration of the second embodiment of the present invention is shown in FIG. The second embodiment is an array substrate, and this array substrate 1 is provided with a switching circuit 23 between the pad 24 and the scanning line 12 in the array substrate of the first embodiment shown in FIG. In addition, a switching circuit 25 is provided between the pad 26 and the signal line 14.

The switching circuit 23 is a circuit for distributing a signal sent from the outside via the pad 24 to a plurality of scanning lines 12. The switching circuit 25 is a circuit for distributing a signal sent from the outside via the pad 26 to the plurality of signal lines 14. In the array substrate 1 of the first embodiment shown in FIG. 1, one pad 24 is provided for one scanning line 12 and one pad 24 is provided.
The configuration is such that one pad 26 is provided for the main signal line 14. On the other hand, in the second embodiment, one pad 24 is provided for a plurality of scanning lines 12.
And one pad 26 is provided for a plurality of signal lines.

With this configuration, the pitch between the pads 24 and 26 can be increased, and the production efficiency can be improved.

It goes without saying that the second embodiment has the same effect as the first embodiment.

The array substrate according to the first and second embodiments includes a scanning line driving circuit 20 and a signal line driving circuit 22.
If is not defective, it can be used as an array substrate of a drive circuit integrated type active matrix type liquid crystal display device.

In general, an array substrate constituting an active matrix type liquid crystal display device integrated with a driving circuit includes an X driver 62 and a Y driver 63 for outputting electric signals for driving liquid crystal in a display area 61, as shown in FIG. , A pad section 66 for inputting a signal for driving these drivers 62 and 64 into the device, and a wiring 67 for connecting these.

Although not shown in FIG. 6, the array substrate 60 and the counter substrate are adhered to each other by a seal around the display area, and a liquid crystal layer (not shown) is held between the pair of substrates. A polarizing plate (not shown) large enough to cover the display area 61 is attached to each side of the array substrate 60 and the counter substrate facing the liquid crystal layer. Light (not shown) passes through the polarizing plate bonded to the side of the array substrate 60 facing the liquid crystal layer, the liquid crystal layer, and the polarizing plate bonded to the side of the counter substrate facing the liquid crystal layer. With this configuration, characters and images in the display area are visually recognized.

In recent years, there has been a strong demand for a liquid crystal display device having a large screen. In particular, it is desired that the liquid crystal display device has a large display screen size while having the same outer diameter size as that of the conventional liquid crystal display device.

For this purpose, the distance between the display area and the driver must be reduced. In this case, light is emitted from the backlight to the driver portion, and this light causes a current leak between the source electrode and the drain electrode constituting the driver portion, which causes a problem that the display screen quality is remarkably deteriorated.

However, in order to solve this problem, a method of preventing the irradiation of light to the driver section with a new member such as a light shielding tape, for example, leads to an increase in members and man-hours, leading to a reduction in production efficiency.

A liquid crystal display device which maintains the quality of the display screen without reducing the production efficiency will be described with reference to FIG.

FIG. 7 shows the configuration of the third embodiment of the present invention. The third embodiment relates to an active matrix type liquid crystal display device integrated with a drive circuit, in which an array substrate 60, a counter substrate (not shown) provided to face the array substrate, and A liquid crystal layer (not shown) sandwiched between the substrates. The array substrate 60
As shown in FIG. 7, an X driver 62 for outputting an electric signal for driving the liquid crystal in the display area 61 and a Y driver 64
And a pad section 66 for inputting a signal for driving these drivers 62 and 64 into the apparatus, and a wiring 67 connecting these. And array substrate 6
The polarizing plate 70 is attached to the side facing the liquid crystal layer of No. 0. As shown in FIG.
2, 64, so that the amount of light emitted from the backlight to the drivers 62, 64 is reduced to the same extent as the display area 61 formed by the same process as the driver. It is possible to prevent current leakage due to light of the part.

FIG. 7 shows an example of a liquid crystal display device in which both the X-side and the Y-side drive circuits are integrated, but only one side has an integrated drive circuit, and the other has a drive circuit outside the substrate. T
In a liquid crystal display device in which a signal for driving liquid crystal is output to a display electrode by AB or the like, a similar structure can be used as long as the polarizing plate can cover the driver portion on the array substrate from the side facing the liquid crystal layer. The effect can be obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.

The fourth embodiment is an active matrix type liquid crystal display device integrated with a driving circuit, and the configuration of a matrix array substrate 1 of this liquid crystal display device is shown in FIG. The matrix array substrate 1 has a plurality of, for example, 768 parallel scanning lines 12 and a plurality of, for example, 1024 × 3 signal lines 14 formed on an insulating substrate (not shown) having a thickness of 0.7 mm. It has a configuration arranged so as to be substantially orthogonal via a not shown (not shown). For the scanning lines 12 and the signal lines 14, a low-resistance metal material such as Al, an Al alloy, or MoW is used, and a stacked structure of these metal materials is also used.

The scanning line driving circuit 2 is connected to one end of the scanning line 12.
0 is formed, and a scanning line analog switch circuit 80 is formed at the other end. A signal line drive circuit 22 is formed at one end of the signal line 14, and a signal line analog switch circuit 90 is formed at the other end.

In the vicinity of the intersection of the scanning line 12 and the signal line 14, a TFT element 16 as a switching element for controlling the ON / OFF state of the pixel, a pixel electrode 18 connected to the TFT element 16, and a parallel connection to the pixel electrode 18 Are formed for each pixel. A compound semiconductor such as amorphous silicon or polysilicon is used for a semiconductor layer of the TFT element 16, and a compound such as ITO is used for a pixel electrode.

It should be noted that the TFT element 16, the pixel electrode 18 and the auxiliary capacitance 15 constitute a screen display unit 19.

As shown in FIG. 9, the scanning line analog switch circuit 80 includes a TFT element 8 provided for each scanning line 12.
2, a control signal supply line 84 to which a control signal for controlling ON / OFF of these TFT elements 82 is supplied, and an external lead-out line 86. In the TFT element 82, the drain is connected to the corresponding scanning line 12, the gate is connected to the control signal supply line 84, and the source is connected to a wiring 86 drawn out.

The signal line analog switch circuit 90 includes:
As shown in FIG. 10, a TFT provided for each signal line 14 is provided.
An element 92, a control signal supply line 94 to which a control signal for controlling ON / OFF of the TFT element 92 is supplied, and an external lead-out line 96 are provided. TFT element 92
Has a drain connected to the corresponding signal line 14, a gate connected to the control signal supply line 94, and a source connected to a wiring 96 led out.

Next, the operation of the scanning line analog switch circuit 80 and the signal line analog switch circuit 90 according to this embodiment will be described.

First, by inputting a potential sufficiently higher than the potential of the scanning line 12 to the control signal supply line 84,
The TFT element 82 is turned on, and the scanning line 12 is electrically connected to the wiring 86 extended to the outside. Wiring 86
By inputting a potential at which the TFT element 16 of the screen display unit 19 is turned on to all the TFT elements 16
Can be turned on. At the same time, by inputting a potential sufficiently higher than the potential of the signal line 14 to the control signal supply line 94, the TFT element 92 is turned on, and the signal line 14 and the wiring 96 led out are electrically connected. Connected. By inputting an arbitrary potential to the wiring 96, the pixel electrode 18 is set to an arbitrary potential, and an image can be displayed without passing through the driving circuits 20 and 22.

During normal driving, the control signal supply line 84
By inputting a potential lower than the potential of the scanning line 12 to the TFT, the TFT element 82 is turned off, and the driving by the scanning line driving circuit 20 becomes possible. At the same time, by inputting a potential lower than the signal line potential to the control signal supply line 94, the TF
The T element 92 is turned off, and driving by the signal line driving circuit 22 becomes possible.

As described above, according to the present embodiment, in the liquid crystal display device integrated with the drive circuit, a predetermined potential is input to the control signal supply lines 84 and 94 and one signal line 14 is externally supplied. And an electric potential is supplied to the scanning line 12 to enable image display. As a result, a driving potential and a driving signal supply source specific to the screen size and the number of pixels of the liquid crystal display device are not required, so that a development cost can be reduced and a low-cost liquid crystal display device can be provided. Further, all the scanning lines 12 and all the signal lines 14 can be connected to the outside without passing through the scanning line driving circuit 20 and the signal line driving circuit 22. It is possible to determine the defect of the display 22 and the defect of the screen display unit 19, and it is possible to provide a higher-performance liquid crystal display device. Since all the scanning lines 12 and the signal lines 14 of the screen display unit 19 are electrically connected to one wiring 86 and one wiring 96, the potential can be set arbitrarily. DC voltage and the like can be easily applied. By applying an excessive stress such as the application of a direct current, it is possible to find a defect associated with a long-term continuous operation or an intermittent operation in an initial state. Also, the scanning lines 12 and the signal lines 1 are
4 can be compensated for, and a liquid crystal display device with a high yield can be realized.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The fifth embodiment relates to an active matrix type liquid crystal display device integrated with a driving circuit,
The configuration is shown in FIG.

The liquid crystal display of this embodiment is similar to that of FIG.
In the conventional liquid crystal display device shown in FIG.
And a plurality of switch elements 32 composed of, for example, TFT elements
And a wiring 33 for sending a control signal for turning on / off the switch element 32.
The switch element 32 is connected to each scanning line 12 and the scanning line driving circuit 20.
And provided between them. The pad 24 is provided for each scanning line 12.
Is provided at an end opposite to the scanning line driving circuit 20,
The pad 26 is provided at an end of each signal line 14 opposite to the signal line drive circuit 22. These switch elements 32 and pads 24 and 26 are formed on the array substrate 1. Therefore, the array substrate 1 of the liquid crystal display device of the fifth embodiment is different from the array substrate of the first embodiment shown in FIG. 1 in that the switching element is provided between each scanning line 12 and the scanning line driving circuit 20. 32 and a wiring 33. Further, in the fifth embodiment, the switch element 32 and the pads 24 and 26 are formed in a region of the array substrate 1 surrounded by a sealing material.

In the liquid crystal display device of the fifth embodiment, when inspecting the array substrate before bonding the opposing substrate 6, the operation of the scanning line driving circuit 20 is confirmed by turning off the switch element 32, The operation of the signal line drive circuit 22 is confirmed by turning off the switch element 22c. Also, when inspecting the display section 19, the switch element 32 and the switch element 22c are turned off, and the display section 19 is externally driven via the pads 24 and 26. As a result, in the present embodiment, it is possible to separately inspect the driving circuits 20 and 22 and the display unit 19, and determine whether the cause of the defect is on the driving circuit side or on the display unit 19 side. It can be easily determined.

In the liquid crystal display of the fifth embodiment, one TFT is used as the switch element 32.
Although the device is constituted by the elements, any device having a function of turning on / off between the scanning line driving circuit 20 and each scanning line 12 may be used. For example, as shown in FIG.
A transfer gate composed of 2a and n-type transistor 32b may be used. In this case, a gate signal is supplied to the transistor 32a from the wiring 33a,
A gate signal is supplied to the transistor 32b from the wiring 33b. The gate signal supplied through the wiring 33b is a signal obtained by inverting the gate signal supplied through the wiring 33a. With the configuration shown in FIG. 12, the on-resistance of the switch element 32 can be further suppressed.

The buffer circuit 20b, which is a component of the scanning line driving circuit, generally comprises two stages of inverter gates 21a and 21b as shown in FIG. Therefore, the switch element 32 may have a configuration in which a p-type transistor 32a and an n-type transistor 32b are provided in series with the last-stage inverter gate 21b.

Next, a sixth embodiment of the present invention will be described with reference to FIG. The sixth embodiment relates to an active matrix type liquid crystal display device integrated with a drive circuit, and the structure is shown in FIG.

The liquid crystal display device according to the sixth embodiment comprises:
In the liquid crystal display device according to the fifth embodiment shown in FIG. 11, pads 24 and 26 are formed in a region where the sealing material 7 is applied, and are covered with the sealing material 7. With such a configuration, it is possible to prevent the pads 24 and 26 from directly contacting the liquid crystal layer, and it is possible to prevent poor image quality from occurring. As in the fifth embodiment, it is possible to easily determine whether the cause of the defect is on the drive circuits 20 and 22 side or on the display unit 19 side.

Next, a seventh embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The seventh embodiment is an active matrix type liquid crystal display device integrated with a driving circuit, and the configuration is shown in FIG.

The liquid crystal display device of the seventh embodiment differs from the liquid crystal display device of the fifth embodiment shown in FIG.
The pad 24 and the pad 26 are formed in a region facing the counter substrate 6 outside the region surrounded by the sealant 7. With this configuration, since a material having a high dielectric constant, such as a liquid crystal layer (not shown) or the sealing material 7, does not cover the upper portions of the pads 24 and 26, the parasitic capacitance generated between the pads and the counter electrode Can be reduced, and the blunting of the potential pulse supplied from the driving circuits 20 and 22 to the signal line 14 or the scanning line 14 can be suppressed. As a result, it is possible to obtain good image quality without insufficient writing to the pixel electrode 18 and poor holding of the pixel transistor 16.

Next, the configuration of the eighth embodiment of the present invention will be described with reference to FIG. The eighth embodiment is an active matrix type liquid crystal display device integrated with a driving circuit, and the configuration is shown in FIG. The liquid crystal display device according to the eighth embodiment is different from the liquid crystal display device according to the fifth embodiment shown in FIG. 11 in that the pads 24 and 26 are arranged in a region outside the sealing material 7 and not facing the counter substrate 6. The configuration is as follows. In this way, a signal can be supplied from the outside to the pads 24 and 26 not only in the array substrate 1 but also in a cell state where liquid crystal is injected between the array substrate 1 and the opposing substrate 6. Since the input signal voltage can be freely changed, the image quality in the display unit 19 can be evaluated separately from the operation characteristics of the drive circuits 20 and 22. When the display unit 19 and the driving circuits 20 and 22 have been evaluated and the panel is driven as a real panel, the pads remaining on the array substrate 1 may be cut off at lines 34 and 36 shown in FIG. By doing so, it is possible to obtain a good display without the pad being in electrical contact with components outside the liquid crystal display device.

As described above, in the liquid crystal display devices of the fifth to eighth embodiments, the pad 24 is provided on one end of the scanning line 12 or the signal line 14 opposite to the drive circuit connection side.
26, the scanning line 12 or the signal line 1
4 can be input from the pads 24 and 26 without passing through the driving circuits 20 and 22, so that the inspection of the display unit 19 and the inspection of the driving circuits 20 and 22 can be easily cut off. A liquid crystal display device can be obtained. This leads to an improvement in productivity, for example, during the production of the liquid crystal display device, for example, the driving circuit and the display unit can be inspected simultaneously, and a detailed inspection can be performed for each, so that a highly reliable liquid crystal display device can be provided. . In addition, at the time of product development, since each evaluation can be performed independently, development efficiency is significantly improved.

[0060]

As described above, according to the present invention, the productivity can be improved.

Further, according to the present invention, it is possible to easily determine whether the cause of the defect is in the display section or on the driving side.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an array substrate according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a liquid crystal display device configured using the array substrate shown in FIG.

FIG. 3 is an explanatory diagram of a processing method for preventing a short circuit from occurring in a scanning line and a signal line after a scribing process.

FIG. 4 is a liquid crystal display device showing a configuration in a case where an external driving circuit is connected using the array substrate of the first embodiment shown in FIG. 1;

FIG. 5 is a plan view showing a configuration of an array substrate according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram showing a general configuration of an array substrate of a liquid crystal display device integrated with a driving circuit.

FIG. 7 is a configuration diagram illustrating a configuration of a liquid crystal display device according to a third embodiment of the present invention.

FIG. 8 is a diagram illustrating a configuration of an array substrate according to a liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 9 is a circuit diagram showing a configuration of a scanning line analog switch circuit according to a fourth embodiment.

FIG. 10 is a circuit diagram showing a configuration of a signal line analog switch circuit according to a fifth embodiment.

FIG. 11 is a configuration diagram showing a configuration of a liquid crystal display device according to a fifth embodiment of the present invention.

FIG. 12 is a circuit diagram showing a configuration of a specific example of a switch element according to a fifth embodiment.

FIG. 13 is a circuit diagram showing a configuration of another specific example of the switch element according to the fifth embodiment.

FIG. 14 is a diagram illustrating a configuration of a liquid crystal display device according to a sixth embodiment of the present invention.

FIG. 15 is a diagram illustrating a configuration of a liquid crystal display device according to a seventh embodiment of the present invention.

FIG. 16 is a diagram illustrating a configuration of a liquid crystal display device according to an eighth embodiment of the present invention.

FIG. 17 is a diagram illustrating a configuration of a conventional active matrix liquid crystal display device integrated with a driving circuit.

[Explanation of symbols]

 Reference Signs List 1 array substrate 6 counter substrate 7 sealing material 10 glass substrate 12 scanning line 14 signal line 16 TFT element 18 pixel electrode 19 screen display unit 20 scanning line driving circuit 22 signal line driving circuit 24 pad 26 pad 28 scribe line 30 scribe line 32 switch element

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoshi Ejiri 1-9-2, Haramachi, Fukaya-shi, Saitama Pref. Toshiba Fukaya Electronics Factory Co., Ltd. (72) Inventor Tetsuo Morita 1-Haracho, Fukaya-shi, Saitama 9-2 Toshiba Fukaya Electronics Factory

Claims (14)

[Claims] A transparent insulating substrate; a plurality of scanning lines formed on the insulating substrate; a plurality of signal lines formed on the insulating substrate so as to intersect with the scanning lines; A pixel electrode formed at each intersection of the scanning line and the signal line; and a pixel electrode provided corresponding to each pixel electrode, and outputting a signal from the corresponding signal line based on a voltage of the corresponding scanning line. A scanning line drive circuit formed on the insulating substrate to drive the plurality of scanning lines; and a signal formed on the insulating substrate to drive the plurality of signal lines. A line drive circuit, a first group of terminals formed on the insulating substrate for externally applying a signal to the scanning line, and a first terminal group formed on the insulating substrate for externally applying a signal to the signal line And a second terminal group. Array substrate. 2. A first switching circuit provided between the scanning line and the first terminal group for distributing the signal from the outside to the scanning line by switching a connection, and 2. The array according to claim 1, further comprising: a second switching circuit provided between the first terminal group and the second terminal group, the second switching circuit distributing the external signal to the signal line by switching a connection. substrate. 3. The step of inspecting the array substrate according to claim 1 or 2, further comprising the steps of: adhering the array substrate to a counter substrate when there is no defective portion in the array substrate; Cutting the insulating substrate so as to separate the second terminal group from the pixel portion. A method for manufacturing a liquid crystal display device, comprising: 4. A method according to claim 1, further comprising the step of:
4. The method according to claim 3, further comprising: attaching a polarizing plate covering the scanning line driving circuit and the signal line driving circuit. 5. The step of inspecting an array substrate according to claim 1 or 2, further comprising: after bonding the array substrate to a counter substrate when only the scanning line driving circuit or the signal line driving circuit is defective. Cutting the insulating substrate so as to separate the scanning line driving circuit and the signal line driving circuit from a pixel portion. 6. The method according to claim 3, further comprising, after cutting the insulating substrate, irradiating a portion near the cut of the scanning line and the signal line with laser light.
The manufacturing method of the liquid crystal display device according to the above. 7. A transparent insulating substrate, a plurality of scanning lines formed on the insulating substrate, a plurality of signal lines formed on the insulating substrate so as to intersect with the scanning lines, A pixel electrode formed at each intersection of the scanning line and the signal line; and a pixel electrode provided corresponding to each pixel electrode, and outputting a signal from the corresponding signal line based on a voltage of the corresponding scanning line. A scanning line drive circuit formed on the insulating substrate to drive the plurality of scanning lines; and a signal formed on the insulating substrate to drive the plurality of signal lines. A line drive circuit; a scan line analog switch circuit formed on the insulating substrate for externally applying a signal to each of the plurality of scan lines; and each of the plurality of signal lines formed on the insulating substrate Signal from outside Array substrate comprising: the signal line analog switch circuit, the. 8. A plurality of switches each of which is provided for each scanning line and has one end connected to the corresponding scanning line and which is turned on / off based on an external first control signal. A first element connected to the other end of each of the plurality of switch elements and connected to the outside.
Wherein the signal line analog switch circuit is provided for each signal line, and has one end connected to the corresponding signal line, the signal line analog switch circuit being turned on / off based on a second control signal from the outside. 2. The array substrate according to claim 1, further comprising: a switch element, and one second wiring that is connected to the other end of each of the plurality of switch elements and that is drawn to the outside. 3. 9. An array substrate according to claim 7, wherein:
A counter substrate having a counter electrode, a liquid crystal layer sandwiched between the array substrate and the counter substrate using a sealing material,
A liquid crystal display device comprising: 10. A plurality of switch elements provided for each of the plurality of scanning lines and for turning on / off a driving signal transmitted from the scanning line driving circuit to the scanning line based on an external control signal. 3. The method according to claim 1, wherein
An array substrate as described in the above. 11. An array substrate according to claim 10, comprising: a counter substrate having a counter electrode; and a liquid crystal layer sandwiched between the array substrate and the counter substrate using a sealing material. Characteristic liquid crystal display device. 12. The liquid crystal display device according to claim 11, wherein said first and second terminal groups are formed in a region where a liquid crystal layer surrounded by said sealing material is sandwiched. 13. The liquid crystal display device according to claim 11, wherein said first and second terminal groups are formed in a region where said sealing material is applied. 14. The liquid crystal display device according to claim 11, wherein said first and second terminal groups are formed outside a region surrounded by said sealing material.