JPH06186586A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To reduce a manufacturing cost of a liquid crystal display device and to lower price by prividing auxiliary wirings of gate signal and a sourece signal for the inspection on the outside of the pixel display area of a liquid crystal display pannel. CONSTITUTION:In this device, switching elements 6 are arranged at every element per one picture element at cross-points between auxiliary wirings 5, 7 of the gate signal and the source signal for the inspection arranged on the outside of the pixel display area and display source signal wiring. Thus, at the time of the inspection, terminals needed for connection are only batch lighting gate signal input terminals 2a to 2c for red-color pixels, green-color pixels, blue-color pixels, a batch lighting source signal input terminal 3, a drain common electrode 11, and a gate signal input terminal 10a. In this case, the electric connection is performed by connection of only one point since gate signal input terminals 10a, 10b are short-circuited at the time of inspection. Further, the display of eight colors of white, black, red green, blue, yellow, cyan, and magenta are available by combinations of signal inputs to the batch lighting gate signal wiring.

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,
It is intended to be provided at a particularly low cost.

[0002]

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

A gate signal wiring electrode 10 is formed on the array substrate.
a, 10b and gate signal wirings electrically connected thereto are arranged, and the source signal wiring 4 is arranged so as to intersect with the gate wirings. 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 wiring and the gate signal wiring. The source signal wirings are in the order of blue, green, and red, and all the source signal wirings 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 during panel assembly.

[0004]

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

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 number of signal input terminals increases, the number of signal generator terminals used during inspection also increases. The components for electrically connecting the terminals of the signal generator and the source signal input terminals are very expensive and require careful handling.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to obtain a method of 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 object, the present invention is provided with an auxiliary wiring for a gate signal for inspection and a source signal outside the image display area of a liquid crystal display panel.

[0008]

With the above construction, the number of terminals of the signal generator is only the number of display gate signals per pixel and the number of auxiliary wirings, and the cost of the parts connecting the terminals can be greatly reduced. In addition, since the connecting parts are easy to handle, throughput can be improved. As a result, the cost of the liquid crystal display device can be reduced.

[0009]

EXAMPLES Examples of the present invention will be described below. Figure 1
2 is a schematic diagram showing the configuration of a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a sectional configuration diagram of the liquid crystal display device.

First, FIG. 2 will be described. Switching element group 15 composed of thin film transistors (TFT) using amorphous silicon as a semiconductor and indium-tin oxide (hereinafter ITO)
An image display region 19 and a signal wiring electrode, each of which is composed of a pixel electrode group 16 composed of External drive circuit (not shown) having the same configuration as 18
The array substrate 13 made of the glass substrate 21a having the signal input electrode group 20 from No. 1, the transparent common electrode 22 made of ITO, the black stripe layer 23 made of chromium, and the glass substrate 21b having the polyimide alignment film 17
A spacer 24 made of glass fibers or resin fine particles is provided on the counter substrate 14 made of, and the pixel electrode 16 and the transparent electrode 22 are made to face each other and bonded with a resin adhesive 25.
A liquid crystal display panel filled with 6 was prepared. Here, TN type liquid crystal was used. The operation of the liquid crystal display device of this embodiment is the same as the conventional one.

After completion of the panel, the panel is actually driven to inspect for electrical disconnection and short circuit of wirings constituting the array.
At this time, the terminals required for connection are red pixels as shown in FIG.
Gate signal input terminals 2a, 2b, 2c for collective lighting of green pixels and blue pixels and source signal input terminal 3 for collective lighting,
Drain common electrode 11 and gate signal input terminal 10a
It's 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 combining signal input to the 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 can be very small at the time of inspection as compared with the conventional one. Therefore, poor connection between terminals is less likely to occur,
The time loss due to inspection errors and connection adjustment can be reduced. Moreover, since the number of connecting terminals is small, the risk of damage to the connecting portion is reduced. As a result, it is possible to increase the throughput of the inspection process and reduce the price of the liquid crystal display device.

[Brief description of drawings]

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

FIG. 2 is a sectional view of the same 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 Lead wire 5a Red pixel batch lighting gate signal wiring 5b Green pixel batch lighting gate signal wiring 5c Blue pixel batch lighting gate signal wiring 6a, 6d Red pixel batch lighting transistor 6b, 6e Green pixel batch 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)

[Claims] 1. A gate signal for inspection outside the image display area,
Equipped with auxiliary wiring for source signal, 1 at each intersection of each gate, auxiliary wiring for source signal and source signal wiring for display
A liquid crystal display device comprising one switching element per pixel.