JP3508731B2 - Liquid crystal display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device. 2. Description of the Related Art FIG. 3 is a schematic view showing a configuration of an electrode portion and a part of 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 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 wiring and the gate signal wiring. 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 during panel assembly. [0004] In the case of a color panel,
Conventionally, there are three types of signals required for inspection: a red pixel, a green pixel, and a blue pixel.
Since the cycle is green and blue, it is necessary to electrically connect the signal generator terminals to all signal input terminals to display colors such as white, black, red, green, blue, etc. . 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 signal generator terminals used for inspection also increases. Components for electrically connecting the signal generator terminal to 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 to provide a method for simplifying the process of a liquid crystal display device and reducing the cost of the liquid crystal display device. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a plurality of pixel electrodes, a pixel transistor individually connected to the pixel electrodes, and a pixel transistor on an array substrate. An array substrate having a plurality of gate signal wirings and source signal wirings arranged in a lattice so as to drive the pixel electrodes through the counter substrate and a counter substrate having a transparent electrode are bonded with a liquid crystal composition interposed therebetween. A liquid crystal display device is combined, a switching element for switching supply of a display signal for inspection is individually connected to the plurality of source signal wirings, and each switching element is connected via a switching element. A source signal line for collective lighting for supplying a display signal for inspection to the source signal line is provided in common, and the conduction of the switching element and A plurality of collective lighting gate signal lines for inputting a signal for controlling the cutoff are arranged so that different signals are input to each of the adjacent source signal lines. A red pixel collective lighting gate signal wiring for collective lighting of the red pixel, a green pixel collective lighting gate signal wiring for collective lighting of the green pixel, and a blue A blue pixel collective lighting gate signal line for collective lighting of pixels. With the above configuration, the number of terminals of the signal generator is one.
Only the number of display gate signals and the number of auxiliary wirings per pixel are required, which can greatly reduce the cost of components for connecting terminals. Also, because the handling of connection parts is easy,
Throughput can be improved. As a result, the cost of the liquid crystal display device can be reduced. An embodiment 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 sectional configuration diagram of the liquid crystal display device. First, FIG. 2 will be described. 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 pixel electrode group 16, a polyimide alignment film 17, 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 titanium as a source electrode. External drive circuit (not shown) having the same configuration as 18
Array substrate 13 comprising 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 an opposing substrate 14 made of glass. The pixel electrode 16 and the transparent electrode 22 are opposed to each other and bonded with a resin adhesive 25.
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, 2c for 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 combining the 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 method. As described above, according to the present invention, the number of the electrical connection portions of the panel at the time of inspection can be extremely small as compared with the related art.
As a result, connection failure between terminals is less likely to occur, and inspection errors and time loss for connection adjustment can be reduced. In addition, since the number of connection terminals is small, the risk 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 an embodiment of the present invention. FIG. 2 is a cross-sectional view of the embodiment. FIG. 3 shows a configuration of a conventional liquid crystal display device. 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 Collective 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 Transistors 6b, 6e Transistors 6c, 6f for green pixel batch lighting Transistors 7a, 7b, 7c for blue pixel batch lighting Source signal wiring for batch lighting The source signal line 9 pixel portion 10a, 10b a gate signal input terminal 11 common drain electrode 12 pixel transistor

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Claims (1)

(57) Claims 1. A plurality of pixel electrodes, pixel transistors individually connected to the pixel electrodes, and the pixel electrodes are driven via the pixel transistors on an array substrate. An array substrate having a plurality of gate signal wirings and source signal wirings arranged in a grid and a counter substrate having a transparent electrode are bonded together via a liquid crystal composition to constitute a liquid crystal display device, In the plurality of source signal wirings,
Switching elements for switching supply of a display signal for inspection are individually connected, and each switching element has a collective lighting source for supplying a display signal for inspection to the source signal wiring via the switching element. A signal line is commonly arranged, and a collective lighting gate signal line for inputting a signal for controlling conduction and cutoff of the switching element is configured such that different signals are input to adjacent source signal lines. A plurality of the collective lighting gate signal lines are connected to the pixels via the switching elements, and a red pixel collective lighting gate signal line for collective lighting of the red pixels and a green pixel signal line are provided. A green pixel collective lighting gate signal wiring for collective lighting and a blue pixel collective lighting gate signal wiring for collective lighting of the blue pixels are provided. The liquid crystal display device according to claim.