JPH02223925A - liquid crystal device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for forming a peripheral circuit for driving a liquid crystal display panel in which a liquid crystal layer is sandwiched between two upper and lower substrates.

[Prior Art] A conventional liquid crystal display panel had a structure as shown in FIG. FIG. 2 shows a partial cross-sectional view of a conventional liquid crystal display panel. Second
In the figure, 2i, 22 is a glass substrate, 23 is an electrode terminal, 24 is an anisotropic conductive film, 25 is a liquid crystal drive part 01.26
Reference numeral 27 indicates a driver tape on which a TO for driving a liquid crystal display is mounted, and 27 indicates a rigid circuit board on which bus lines and the like are formed. The liquid crystal layer 28 is sandwiched between the glass substrates 21 and 22, and the seal portion 29
The liquid crystal layer is enclosed within the glass substrates 21 and 22 to form a liquid crystal panel, and an electrode terminal 25 for driving the liquid crystal extending from the inner surface of the liquid crystal panel is formed at a portion on one side of the substrate extending from the opposing substrate. was. On the other hand, the driver tape 26 on which the liquid crystal drive member C is mounted by Guyang bonding is electrically connected to the electrode terminal 23 at its output end by an anisotropic conductive film 24. Furthermore, the input end of the driver tape: l-1 is soldered to a rigid circuit board on which a bus line and the like are formed.

[Problems to be Solved by the Invention] However, as is clear from FIG. 2, the conventional liquid crystal display panel has many problems.

First, conventional LCD panels require a large number of components to drive the liquid crystal, including the LCD panel, a rigid circuit board that forms a bus line, and multiple driver tapes.
For this reason, the cost of parts is high, and the manufacturing cost is also high as the number of connection points increases.

Furthermore, conventional liquid crystal display panels require a large number of component parts to drive the liquid crystal. and the driver tape, and between the rigid board and the driver tape due to soldering, and the reliability of the total connection decreased accordingly.

Furthermore, conventional LCD panels have large parts such as driver tape and rigid boards attached to the outside of the LCD panel, and the frame size for the active screen of the LCD panel is thick (which reduces the product value). Ta.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve these conventional drawbacks, reduce the number of component parts of a liquid crystal display panel, reduce cost, improve reliability, and reduce frame size.

[Means for Solving the Problems] A liquid crystal display panel according to the present invention has a liquid crystal layer sandwiched between two upper and lower substrates made of glass or resin, in which at least one of the substrates is ,
A conductive wiring pattern of at least two layers is formed by sandwiching a thin film such as an organic thin film or an inorganic thin film, and a part of the thin film is formed with appropriate holes, nine steps of notches, etc., so that the conductive wiring pattern between different layers is vertically conductive. It is characterized in that electrode terminals for directly or indirectly inputting signals for driving the liquid crystal display panel from the outside and peripheral circuits for driving the panel such as bus lines are formed on the substrate.

[Embodiment 7] An embodiment of the present invention will be explained below with reference to the drawings. Fig. 1 shows a sectional view of a main part of an embodiment of the present invention. In FIG. 1, 1. 3 is a glass substrate, 3 is a wiring pattern within the panel, 4 is a sealing part, 5 is a liquid crystal layer, 6 is a color filter layer, 7 is a conductive wiring pattern of the -th layer, 8 is an organic thin film layer, 9
10 indicates a conductive wiring pattern of the second layer, 10 indicates a hole in the organic thin film layer, and 11 indicates a step in the organic thin film layer. The liquid crystal layer 5 is sandwiched between the glass substrates 1.2 and confined by the seal portion 4 to form a liquid crystal spring. The organic thin film layer 8 is of the same quality and can be formed simultaneously with the color filter layer 6. The conductive wiring pattern of the -th layer is made of To, Ni, Or.

It is made of Ta or the like and is formed on the entire surface by vapor deposition, sputtering, OVD, etc., and then etching. Thereafter, an organic thin film layer is formed on the wiring pattern, which becomes an insulating layer. This organic thin film layer has holes, notches, nine steps, etc. formed as appropriate. Furthermore, another layer of conductive wiring is formed on the organic thin film layer, and the conductive wiring pattern on this organic thin film is a step difference between the conductive wiring pattern of the second layer and the notch or hole in the organic thin film layer. The top and bottom are electrically connected.

As is clear from FIG. 1, in the liquid crystal display panel according to the present invention, the number of components required to drive the liquid crystal is extremely small because the circuit pattern forming the bus line is formed on the liquid crystal display panel. This also eliminates the need for connection between the liquid crystal panel and the rigid substrate, resulting in lower manufacturing costs.

Furthermore, in the liquid crystal display panel according to the present invention, the number of components required to drive the liquid crystal can be significantly reduced because the circuit pattern forming the bus line is formed on the liquid crystal display panel. Since the number of connection points can also be reduced, the overall reliability of the connection can be improved.

Furthermore, in the liquid crystal display panel according to the present invention, the number of components required to drive the liquid crystal is reduced because the circuit pattern forming the bus line is formed on the liquid crystal display panel, and the large components are outside the liquid crystal panel. It is possible to reduce the frame size for the active screen of the liquid crystal panel without causing problems.As mentioned above, the number of layers of the conductive wiring pattern is not only 2 layers (6 or more layers) Also good.

Further, FIG. 3 is a sectional view of a main part of another embodiment of the present invention in which a liquid crystal driving device O is mounted on a glass substrate in a seven-eighths-down manner. The electrode bump 13 of the liquid crystal drive workpiece 012 is connected to an electrode terminal connected to the wiring pattern in the panel and an electrode terminal connected to the input signal terminal, and is used to give a common signal to multiple liquid crystal drive IOs or to send a continuous signal. give.

In some cases, the bus line is wired to intersect with the electrode terminal connecting to the electrode bump 13 of the liquid crystal driving IO through an insulating layer, and the wiring pattern that directly drives the liquid crystal, the bus line, and the input signal line are wired. So to speak, it has a three-dimensional structure.

[Effects of the Invention] As explained above, the present invention provides a circuit pattern for forming a bus line etc. for driving a liquid crystal panel by forming a plurality of layers of conductive wiring patterns on a substrate via a thin film.
Reduce costs, improve reliability, and reduce frame size (
It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts in an embodiment of the present invention. FIG. 2 is a sectional view of main parts in a conventional embodiment. FIG. 3 is a sectional view of main parts in another embodiment of the present invention. 1.2, 21.22...Glass substrate 3.30.
...Panel wiring pattern 4.29...
Seal portion 5.28...Liquid crystal layer 6.62...Color filter layer 7...
.....-th layer conductive wiring pattern 8...
・・・・・・・・・・・・Organic thin film layer 9・・・・・・
......Second layer conductive wiring pattern 10...
...... Hole 11 of organic thin film layer...
......Step part 23 of organic thin film layer...
・・・・Electrode terminal 24・・・・・・・・・Anisotropic conductive film 12.25・・・For liquid crystal drive C 13・・・・・・・・・For liquid crystal drive IO electrode bump 14......Second organic thin film layer 26...Driver tape 27.
・・・・・・・・・・・・Rigid circuit board Figure 1 and above

Claims (1)

[Claims] In a liquid crystal panel in which a liquid crystal layer is sandwiched between two upper and lower substrates made of glass or resin, at least one of the substrates has at least two layers of conductive wiring patterns formed of thin films such as organic thin films or inorganic thin films. Holes, notches, steps, etc. are appropriately formed in a part of the thin film, and conductive wiring patterns between different layers are vertically connected, and signals for driving the liquid crystal display panel are transmitted directly or directly onto the substrate. A liquid crystal display panel characterized by forming together electrode terminals for indirect input from the outside and peripheral circuits for driving the panel such as bus lines.