JP3203841B2 - Liquid crystal display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device,
In particular, it is intended to be provided at low cost.

[0002]

2. Description of the Related Art FIG. 3 is a schematic view showing a configuration of an electrode section and a part of a pixel section of a liquid crystal display device, which is an example of a conventional liquid crystal display device.

A gate signal wiring electrode 10 is provided on an array substrate.
a, 10b and gate signal wiring electrically connected thereto are arranged, and the source signal wiring 4 is arranged so as to cross the gate wiring. Source signal wiring electrodes 1 a to 1 g are arranged at the ends of the source signal wiring 4, and are electrically connected to the source signal wiring 4. Source signal wiring 4
A switching element is arranged at the intersection of the gate signal line and the gate signal line. The source signal lines are arranged in the order of blue, green, and red, and all the source signal lines are arranged in this cycle. The drain common electrode 11 is electrically connected to an electrode of a transparent electrode substrate arranged to face the array when assembling the panel.

[0004]

In the case of a color panel,
Conventionally, there are three types of signals required for inspection, for red pixels, green pixels, and blue pixels.
Since the cycle is green and blue, to display colors such as white, black, red, green, blue, etc., it is necessary to electrically connect the signal generator terminals to all signal input terminals respectively .

Therefore, the number of terminals of the signal generator must be the same as the number of signal input terminals of the panel to be inspected. As the panel has more signal input terminals, the number of terminals of the signal generator used at the time of inspection increases. Components for electrically connecting the signal generator terminal and the source signal input terminal are very expensive and require careful handling.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a method for simplifying the process of a liquid crystal display device and reducing the cost of the liquid crystal display device.

[0007]

In order to achieve the above-mentioned object, the present invention provides a counter substrate having a spacer provided on a counter substrate.
The board and the array substrate are opposed to each other and bonded with the adhesive
And apply the liquid crystal composition to the gap formed by the spacer.
Filling to form a liquid crystal display device, in front of the counter substrate
A transparent electrode is provided on the liquid crystal composition side, and the array substrate is provided.
In the image display area on the liquid crystal composition side of
Signal wires, multiple source signal wires, and multiple pixel
A runis group and a plurality of pixel electrodes are provided, and
The source signal is crossed with each of the gate signal lines.
Signal wiring is provided, and the gate signal wiring and the saw
The pixel transistor is disposed at the intersection with the
And the gate electrode of the pixel transistor is connected to the gate signal.
Source electrode of the pixel transistor
Is connected to the source signal line, and the pixel transistor
A drain electrode of the pixel is connected to the pixel electrode;
A liquid crystal display device is provided outside the image display area of the array substrate.
In order to drive and inspect the gate signals,
Connected to a portion of the line extending outside the image display area
A gate signal input terminal,
Connection points where each terminal is short-circuited during inspection are provided.
Extending outside the image display area of the source signal wiring of
Source signal input terminals are connected to
Extending outside the image display area of the source signal wiring.
Source signals for multiple lighting so as to intersect with
A plurality of source signal wirings for collective lighting are provided;
Source signal input terminal for collective lighting so that it is connected to all
A source signal line for batch lighting and the source signal;
Intersects with the portion of the signal wiring that extends outside the image display area
A plurality of switching elements are provided at the intersections, and
The arrangement of the switching element is per one pixel transistor.
One, and the source electrode of the switching element is
Connected to the source signal line for batch lighting
The drain electrode of the device is connected to the image display area of the source signal wiring.
Connected to a part extending out of the area, and
For batch lighting of multiple devices connected to the gate electrode of the switching element
A gate signal line is disposed, and the gate signal for batch lighting is provided.
Source signal input for batch lighting to be connected to each wiring
Terminals are provided, and further, an image display area of the array substrate.
Drain common electrically connected to the transparent electrode
An electrode is provided .

[0008]

According to the above configuration, the number of terminals of the signal generator is only required to be the number of display gate signals and the number of auxiliary wirings per pixel, thereby greatly reducing the cost of components for connecting the terminals. In addition, since the handling of the connecting parts is easy, the throughput can be improved. As a result, the cost of the liquid crystal display device can be reduced.

[0009]

Embodiments of the present invention will be described below. FIG.
FIG. 1 is a schematic diagram showing a configuration of a liquid crystal display device according to one embodiment of the present invention, and FIG. 2 is a cross-sectional configuration diagram of the liquid crystal display device.

FIG. 2 will be described first. Switching element group 15 composed of a thin film transistor (TFT) using amorphous silicon as a semiconductor and indium-tin oxide (hereinafter ITO)
Image display area 19 and signal wiring electrodes comprising a signal input electrode group 20 having a two-layer structure of aluminum and chromium as a gate electrode and a two-layer structure of aluminum and chromium as a source electrode. External drive circuit (not shown) having the same configuration as 18
Array substrate 13 composed of a glass substrate 21a having a signal input electrode group 20 from the substrate, a glass substrate 21b having a transparent common electrode 22 composed of ITO, a black stripe layer 23 composed of chromium, and a polyimide alignment film 17
A spacer 24 made of glass fiber or resin fine particles is provided on a counter substrate 14 made of glass, and the pixel electrode 16 and the transparent electrode 22 are attached to each other with a resin adhesive 25 so as to face each other.
A liquid crystal display panel filled with No. 6 was prepared. Here, a TN type liquid crystal was used. The operation of the liquid crystal display device of the present embodiment is the same as that of the related art.

After the completion of the panel, the electrical disconnection and short circuit of the wiring constituting the array are inspected by actually driving the panel.
The terminal required for connection at this time is a red pixel as shown in FIG.
Collective lighting gate signal input terminals 2a, 2b and 2c of green and blue pixels and collective lighting source signal input terminals 3;
Drain common electrode 11 and gate signal input terminal 10a
Only needs to be done. Here, the gate signal input terminals 10a and 10b are short-circuited at the time of inspection, and only one electrical connection is required. By combination of signal input to gate signal wiring for batch lighting,
Eight colors of white, black, red, green, blue, yellow, cyan, and magenta can be displayed. The inspection method itself is the same as the conventional one.

[0012]

As described above, according to the present invention, the number of electrical connection portions of the panel at the time of inspection is very small as compared with the conventional one. Therefore, poor connection between the terminals is less likely to occur,
Inspection errors and time loss for connection adjustment can be reduced. In addition, since the number of connection terminals is small, the danger of breakage of the connection portion is reduced. As a result, it is possible to increase the throughput of the inspection process and reduce the cost of the liquid crystal display device.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a liquid crystal display device according to one embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment.

FIG. 3 is a schematic diagram showing a configuration of a conventional liquid crystal display device.

[Explanation of symbols]

1a, 1b, 1c, 1d, 1e, 1f, 1g Source signal input terminal 2a Red pixel batch lighting gate signal input terminal 2b Green pixel batch lighting gate signal input terminal 2c Blue pixel batch lighting gate signal input terminal 3 Batch lighting Source signal input terminal 4 Leader wiring 5a Red pixel collective lighting gate signal wiring 5b Green pixel collective lighting gate signal wiring 5c Blue pixel collective lighting gate signal wiring 6a, 6d Red pixel collective lighting transistor 6b, 6e Green pixel collective Lighting transistor 6c, 6f Blue pixel batch lighting transistor 7a, 7b, 7c Batch lighting source signal wiring 8 Source signal wiring 9 Pixel section 10a, 10b Gate signal input terminal 11 Drain common electrode 12 Pixel transistor

Claims (1)

(57) [Claims] A spacer provided on an opposing substrate, and
The substrate and the array substrate are opposed to each other and bonded with the adhesive.
The liquid crystal composition is placed in the gap formed by the spacer.
To form a liquid crystal display device, and a transparent electrode is provided on the liquid crystal composition side of the counter substrate.
In the image display area on the liquid crystal composition side of the array substrate.
A plurality of gate signal lines and a plurality of source signal lines
And a plurality of pixel transistor groups and a plurality of pixel electrodes.
Vignetting, and the so as to intersect with the gate signal lines each
Each of the source signal wirings is provided, and the
The pixel transistor is located at the intersection with the source signal line.
And the gate electrode of the pixel transistor is connected to the gate electrode.
Connected to the pixel signal wiring, and
The source electrode is connected to the source signal line, and the pixel
A drain electrode of the transistor is connected to the pixel electrode, and a liquid crystal display is provided outside the image display area of the array substrate.
In order to drive and inspect the display device, a portion of each of the gate signal lines extending outside the image display area is provided.
A gate signal input terminal to be connected is provided, and
Connection points where signal input terminals are short-circuited during inspection are provided.
It is, extended to the outside of the image display region of each of the source signal line
Source signal input terminal so that it is connected to the
Is arranged, the source signal outside extending the portion of the image display region of the wiring
Multiple source signal lines for batch lighting
And a plurality of the collective lighting source signal wirings.
The source signal input terminals for batch lighting are
The source signal line for collective lighting and the source signal line.
Multiple points at the intersection that intersects the part that extends outside the image display area
The switching element is provided, wherein the switching element
Der arrangement of one per one said pixel transistor
And the source electrode of the switching element is turned on at once.
Connected to the source signal line for
The rain electrode is located outside the image display area of the source signal wiring.
Connected to the extended portion, and connected to the gate electrode of the switching element
A plurality of collective lighting gate signal wirings are provided,
Lights all at once to be connected to each lighting gate signal wiring
A gate signal input terminal is provided, and the transparent electrode is provided outside the image display area of the array substrate.
A liquid crystal display device comprising a drain common electrode electrically connected to a pole .