JPH01302396A - Liquid crystal display - Google Patents

Abstract

PURPOSE:To execute the fine line of the mutual joint part of small-sized liquid crystal display panels in a multiscreen picture by arranging one side, in which a video signal output circuit and a scanning signal output circuit are arranged, so as to be located in the periphery of the multiscreen picture. CONSTITUTION:A video signal output circuit 6 and a scanning signal output circuit 7 are both arranged at one side of a liquid crystal panel part 1, a signal line made parallel to the one side is formed for each individual signal line 5, simultaneously, it is directly coupled to the signal line, and it is connected through an auxiliary signal line 5a vertical to the one side to the video signal output circuit 6 or scanning signal output circuit 7. Namely, for example, when the liquid crystal display is used as the small-sized liquid crystal display panel to compose a multiscreen type liquid crystal display panel 8, the video signal output circuit 6 and scanning signal output circuit 7 can be both prevented from existing in the mutual joint part of the small-sized liquid crystal display panels. Thus, the execution of the fine line of the mutual joint part of the small-sized liquid crystal display panels in the multiscreen picture can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device used mainly as a small liquid crystal display panel constituting a multi-screen liquid crystal display panel.

[Prior Art] A liquid crystal spring part in a liquid crystal display device is formed with a large number of pixel electrodes arranged in a matrix, as well as vertical video signal lines and horizontal scanning signal lines. and,
A video signal output circuit that supplies a video signal to the video signal line and a scanning signal output circuit that supplies a scanning signal to the scan signal line are arranged outside the bulb, but in a conventional liquid crystal display device, this video signal The output circuit and the scanning signal output circuit were respectively arranged on two mutually orthogonal sides of the liquid crystal panel section.

[Problems to be Solved by the Invention] In the conventional liquid crystal display device described above, when used as a small liquid crystal display panel that constitutes a multi-screen type liquid crystal display panel by arranging a plurality of sheets vertically and horizontally, the small liquid crystal display panels do not interact with each other. Since the video signal output circuit or the scanning signal output circuit is located at the joint, this joint becomes thick, and this thick joint formed within the multi-screen screen has been an obstacle to improving image quality.

In order to solve the above problem, the applicant of the present invention first developed a liquid crystal display device having a configuration in which both a video signal output circuit and a scanning signal output circuit are arranged on one side of the liquid crystal panel part, and filed an application. However, in the liquid crystal display device of this prior application, the scanning signal line and the scanning signal output circuit were connected through a scanning signal switching element. Although this configuration allows the joint portion to be made thinner, there is a problem in that the circuit configuration becomes complicated because a switching element is required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to thin the joints between small liquid crystal display panels in a multi-screen screen when used as small liquid crystal display panels constituting a multi-screen liquid crystal display panel. The main object is to obtain a liquid crystal display device which has a simple circuit configuration and is easy to manufacture.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a video signal output circuit that supplies a video signal to a video signal line and a scanning signal output circuit that supplies a scanning signal to a scanning signal line. Either the video signal line or the scanning signal line, which is placed on one side of the LCD panel and parallel to this side, is
It was connected to the video signal output circuit or the scanning signal output circuit via a connection signal line perpendicular to the one side, which was formed for each signal line and directly connected to the signal line.

[For cattle] When using the liquid crystal display device with the above configuration as a small liquid crystal display panel constituting a multi-screen type liquid crystal display panel, one side where the video signal output circuit and the scanning signal output circuit are arranged is By arranging them around the periphery of the screen, it is possible to prevent the video signal output circuit and scanning signal output circuit from coming into contact with the joints between the small LCD panels, and to prevent the video signal output circuit and the scanning signal output circuit from coming into contact with the joints between the small LCD panels in a multi-screen screen. The thinning of the lines is achieved.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

112i, the liquid of the liquid crystal display device 1 according to the embodiment of the present invention;

The circuit configuration of the crystal panel section 1a is shown. The liquid crystal panel section 1a consists of two glass electrode substrates on which various electrodes, etc. are formed, stretched across each other via a spacer and filled with liquid crystal, arranged in a matrix, as shown in the main part in Fig. 2. A large number of pixel electrodes (only three are shown in FIG. 1) 2, a switching element 3 for the pixel electrode, such as a thin film transistor (TPT), provided for each pixel electrode, a large number of video signal lines 4 formed in the vertical direction, A large number of scanning signal lines 5 are provided horizontally.

In the embodiment of the present invention, a video signal output circuit 6 that supplies a video signal to the video signal line 4 and a scanning signal output circuit 7 that supplies a scanning signal to the scanning signal line 5 are both connected to the liquid crystal panel section 1a.
It is arranged on one side in the vertical direction (lower side in FIG. 1). The horizontal scanning signal line 5 is directly connected one-to-one to a vertical connection signal line 5a formed for each scanning signal line 5 and connected to the scanning signal output circuit 7. There is. The video signal line 4 is connected to the video signal output circuit 6 in a conventional manner. Note that the circuit of the liquid crystal panel section 1a described above is formed on the glass electrode substrate on the backlight side. Further, each connection between the video signal output circuit 6 and the scanning signal output circuit 7 and the video signal line 4 and the connection signal line 5a is usually made by providing the video signal output circuit 6 and the scanning signal output circuit 7. The edge of the flexible wiring board is overlapped with the edge of the liquid crystal panel 1a side via an anisotropically conductive thermocompression sheet and bonded by thermocompression.

FIG. 3 shows a liquid crystal display device having the above structure used as a small liquid crystal display panel for a multi-screen type liquid crystal display panel, and six panels thereof arranged to form a multi-screen type liquid crystal display panel 8. As shown in the figure, the present invention The upper three panels of the six small LCD panel panels 1, which are the liquid crystal display device of the embodiment, are connected to the lower three panels so that the video signal output circuit 6 and scanning signal output circuit 7 are on the upper side. The sheets are arranged at the bottom to form a multi-screen.

As a result, the video signal output circuit 6 and the scanning signal output circuit 7 no longer exist in the multi-screen screen, so the joint between the small liquid crystal display panels 1 (as indicated by the arrow (a)
) is achieved.

Regarding the circuit configuration of this liquid crystal display device (small liquid crystal display panel), especially regarding the circuit configuration of the scanning signal line,
Original horizontal scanning signal line 5 and connection signal line 5 Et
The circuit is simple and easy to manufacture because the two are simply directly connected.

In the above embodiment, the video signal output circuit and the scanning signal output circuit are arranged on one vertical side of the liquid crystal panel section 1a, but they can also be arranged on one horizontal side. be. In this case, the video signal output circuit and the video signal line are connected via a video signal connection signal line formed in the horizontal direction.

Further, the present invention can also be applied to a device using a two-terminal element such as a thin film diode (TFD) as a switching element for a pixel electrode. In this case, the video signal line and the video signal output circuit are formed on the glass electrode substrate on the display surface side, which faces the glass electrode substrate on the backlight side where the pixel electrodes and the like are provided.

Further, the present invention is not necessarily limited to use in a multi-screen type liquid crystal display panel, but may be used as a single liquid crystal display panel. In this case, since the output circuits are concentrated on one side, it may be advantageous in terms of design regarding the arrangement of other circuits and components outside the panel.

[Effects of the Invention] As explained above, according to the present invention, both the video signal output circuit and the scanning signal output circuit are arranged on one side of the liquid crystal spring portion, and are parallel to this one side. The signal line is connected to the video signal output circuit or the scanning signal output circuit via an auxiliary signal line perpendicular to the one side, which is formed for each individual signal line and directly connected to the signal line. ,j
If this liquid crystal display device is used as a small liquid crystal display panel constituting a multi-screen liquid crystal display panel, it is necessary to ensure that neither a video signal output circuit nor a scanning signal output circuit is present at the joint between the small liquid crystal display panels. As a result, the joints between small liquid crystal display panels in multi-screen screens have been made thinner.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of a liquid crystal panel section of a liquid crystal display device showing an embodiment of the present invention, FIG. 2 is an enlarged view of main parts in FIG. 1, and FIG. FIG. 2 is a front view of a multi-screen liquid crystal display panel configured using a multi-screen liquid crystal display panel. 1...Liquid crystal panel part, 4...Video signal line, 5...
- Scanning signal line, 5a... Connection signal line, 6... Video signal output circuit, 7... Scanning signal output circuit, 8... Multi-screen type liquid crystal display panel.

Claims (1)

[Claims] A video signal output circuit that supplies a video signal to the video signal line and a scanning signal output circuit that supplies a scanning signal to the scanning signal line are both arranged on one side of the liquid crystal panel section and parallel to this one side. Either the video signal line or the scanning signal line connects the video signal via a connection signal line perpendicular to the one side, which is formed for each signal line and directly connected to the signal line. A liquid crystal display device characterized in that it is connected to a signal output circuit or a scanning signal output circuit.