JPS63294527A - Liquid crystal display panel - Google Patents

Abstract

PURPOSE:To obtain a liquid crystal display panel which has a wide angle of field of a projection television and facilitates color adjustment, etc., by forming independent display regions on one substrate and commonly forming the X direction signal wires or Y direction signal wires of these display regions. CONSTITUTION:Plural pieces of the independent display regions 25-27 are formed on one substrate 24 and at least either of the X direction signal wires 4 and Y direction signal wires 3 of plural pieces of the display regions 25-27 are formed common. Projection electrodes 28 and conductive joint layers 29 are formed to the X direction signal wires and Y direction signal wires at the periphery of the liquid crystal display panel. The angle of field of the projection television is extremely widened. Adjustment of the 3 display region regions 25-27 at tone time is also possible.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid crystal display panel used in a projection television or the like.

Conventional technology Traditionally, projection televisions have three colors: red, green, and blue (hereinafter referred to as R).
, G, and B)).
A color image is obtained by projecting the images of each CRT onto a screen and combining them. However, since images obtained on a CRT are projected onto a screen, there is a limit to the ability to obtain high-brightness and high-resolution images. Therefore, in recent years, projection televisions that use liquid crystal display panels instead of CRTs have been proposed. Specifically, JP-A-61-13885, JP-A-60-3291, and JP-A-60-2916.
Issues such as Publications, etc.

An example of a liquid crystal display panel used in a conventional projection television will be described below with reference to the drawings.

FIG. 8(a) is a plan view of a liquid crystal display device using a conventional liquid crystal display panel, and FIG. 8(b) is a plan view of a liquid crystal display device using a conventional liquid crystal display panel.
It is a sectional view taken along the -A' line. In Figures 8(a) and 8(b), parts unnecessary for explanation have been omitted, and there are parts that have been reduced or enlarged in the thickness direction.
The above also applies to the following drawings. In addition, the liquid crystal display panel is composed of at least 100 signal lines in both the X direction and the Y direction, but in the drawing,
The number of direction signal lines is 10 and the number of Y direction signal lines is 15. First, in FIG. 8 (al, l is an X-direction signal line on a glass substrate.

a glass substrate on which a Y-direction signal line and a pixel switching element are formed; 2 a counter electrode substrate on which a counter electrode is formed;
3 is a Y-direction signal line, 4 is an X-direction signal line, 9 is a Y-direction signal line driving IC 110, and an X-direction signal line driving IC 17 is a Y-direction signal line.
A board (hereinafter referred to as the Y-direction board) on which the tC for driving the direction signal line is mounted, and 8 a board on which the IC for the X-direction signal line is mounted (
Hereinafter, it will be referred to as the X-direction substrate. ), 5 is I for Y direction signal line drive
a flexible board for applying the C output signal to the Y-direction signal line (hereinafter referred to as the Y-direction flexible board), 6
is a flexible substrate (hereinafter referred to as the X-direction flexible substrate) for applying the output signal of the X-direction signal line driving IC to the X-direction signal line. In FIG. is a sealing resin for sealing liquid crystal. Hereinafter, items with the same number or symbol have the same configuration, the same content, or similar content. As shown in FIG. 8(a), the X and Y direction signal lines of the liquid crystal display panel formed at minute intervals are drawn out using the X and Y direction flexible substrate, and the X and Y direction signal line driving ICs are connected. This constitutes a liquid crystal display device.

9(al) is an example in which the x and y direction driving ICs are mounted on the wiring board 13 using a packaging technology called glass-on-chip. B
It is a sectional view taken along the ° line. In FIG. 9(a), the wiring board 13
A liquid crystal display panel is constructed by mounting a driving IC thereon.

A projection television using a liquid crystal display device using a conventional liquid crystal display panel will be described below.

FIG. 10 is a block diagram of a conventional projection television. In FIG. 10, 23 is a light source, 14 is a mirror, and 15
is a half mirror; 116, 17, and 18 are liquid crystal display devices using conventional liquid crystal display panels; 19 is a red projection lens; 20 is a green projection lens; 21 is a blue projection lens; 22 is a transmission screen. It is. First, the light from the light source 23 is distributed and made incident on three liquid crystal display devices.

Each liquid crystal display device transmits only light from a desired pixel area,
The transmitted light is projected onto the screen 22 by each projection lens to obtain a color image.

Problems to be Solved by the Invention However, in a liquid crystal display device using a conventional liquid crystal display panel, a predetermined distance between the liquid crystal display devices, which is indicated by symbol d shown in FIG. 10, is required. The reason why the distance d is required is as follows. In the case of the liquid crystal display panel shown in FIG. is necessary. Also, Figure 9 (
In the case of the liquid crystal display panel a), a substrate area is required to mount the X and Y signal line driving ICs on each of the display panels.

Further, both liquid black display panels require space for fixing parts and position adjustment parts for each display panel.

Therefore, each projection lens must be installed with a certain distance between them.

Therefore, since the angle represented by the symbol θ1 in Fig. 10 is generated,
Conventional projection televisions have a problem in that depending on the angle at which the screen 22 is viewed, the screen may appear reddish or bluish.

In addition, in a projection TV using a conventional liquid crystal display panel, the angle of the three liquid crystal display panels.

It is necessary to adjust the position of each sheet one by one so that there is no color shift or color unevenness on the screen 22. The adjustment work requires many years of experience and a lot of effort and time because there are many adjustment points.

In view of the above-mentioned problems of the present invention, it is an object of the present invention to provide a liquid crystal display panel for a projection television that has a wide viewing angle and allows for very easy adjustment of brown color.

Means for Solving the Problems In order to solve the above problems, the liquid crystal display panel of the present invention has a plurality of independent display areas formed on one substrate, and the X-direction signal and Y-direction signal of the display area. The present invention is a liquid crystal display panel in which at least one of the lines is shared, and a protruding electrode and a conductive bonding layer are formed on an X-direction signal line and a Y-direction open signal line around the liquid crystal display panel.

As described above, the present invention forms a plurality of independent display areas on one substrate, makes at least one of the X-direction signal line and the Y-direction signal line common to the plurality of display areas, and Since protruding electrodes and conductive bonding layers are formed on the X-direction signal lines and Y-direction signal lines around the display panel, the distance between each display area can be made extremely small, and the viewing angle of the projection TV can therefore be reduced. can be made very wide. Additionally, three display areas can be adjusted at once.

EXAMPLE Hereinafter, an example of the liquid crystal display panel of the present invention will be described with reference to the drawings.

FIG. 1(a) is a plan view of a liquid crystal display panel according to a first embodiment of the present invention. Figure 1 (mountain) is C-C' in Figure 1 (a)
FIG. In Figure 1 (a) (b) 2
4 is an array substrate on which switching elements and wiring patterns are formed; 25 is a counter electrode substrate for the first display area;
6 is a counter electrode substrate for the second display area, 27 is a counter electrode substrate for the third display area, and 28 is formed on the X-direction signal line 4 and the Y-direction signal line 3 using plating technology or nail head bonding technology. 29 is a conductive bonding layer formed on the protruding electrode 28 and has a thickness of several μm to several tens of μm.

The conductive bonding layer 29 uses epoxy, phenol, etc. as the main adhesive, and contains Ag, Au, Ni, C, Sn.
It is a mixture of flakes such as OW or a resin that hardens when exposed to ultraviolet rays, and is formed on the protruding electrode 28 by a technique such as transfer. As is clear from FIG. 1(8), three independent display areas are formed on the substrate, the X signal line 4 is shared, and each counter electrode substrate is mounted on each display area. FIG. 2(a) shows a wiring board 3 equipped with a driving IC for a liquid crystal display panel according to the first embodiment of the present invention.
FIG. 2 is a plan view of the device mounted on the LCD panel 0 and assembled into a liquid crystal display device. Glass as the substrate material equipped with the driving IC;
Ceramic, epoxy, etc. are suitable. (in Figure 2) is the second
FIG. 3 is a sectional view taken along line DD' in FIG. Furthermore, as a method for mounting the above-mentioned liquid crystal display panel on the substrate 30 equipped with a driving IC, the conductive bonding layer 29 of the liquid crystal display panel is aligned to face the wiring of the substrate 30 equipped with a driving IC, and then the electrical Connect by heat bonding using an oven, heat column, etc. At this time, the wiring side is made of Au, Ni, ITO.
, Cu, Cr, Ti, etc. are formed in advance. Also, A on the wiring side.
When I is formed, InSn is used as the conductive junction 1i29 to form an alloy connection with Afi.

From the above, in the first embodiment of the present invention, the thickness of the liquid crystal 11 can be adjusted according to each display area by mounting individual counter electrode substrates on each surface area. Therefore, it is possible to set the optimum thickness of the liquid crystal 11 layer for each R, G, and B color.

A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 3(a) is a plan view of a liquid crystal display panel according to a second embodiment of the present invention. 3) is a sectional view taken along the line EE' in FIG. 3(a). In Figure 3 (a) (b) 3
Reference numeral 1 denotes a counter electrode substrate common to the three display areas.

As is clear from FIG. 3(a), three
Two independent display areas are formed, the X signal line 4 is shared, and a common counter electrode substrate 31 is mounted on the display areas. FIG. 4(a) is a plan view of a liquid crystal display panel according to a second embodiment of the present invention mounted on a wiring board 32 equipped with a driving IC and assembled into a liquid crystal display device.

FIG. 4(b) is a sectional view taken along line FF' in FIG. 4(a).

From the above, in the second embodiment of the present invention, by mounting a common counter electrode substrate in each display area, it is possible to inject the liquid crystal 11 of a plurality of display areas at once or to make the thickness of the liquid crystal the same in each display area. It can be done.

A third embodiment of the present invention will be described below with reference to the drawings.

FIG. 5(a) is a plan view of a liquid crystal display panel according to a third embodiment of the present invention. 5th monkey) is G-G' in Figure 5(a)
FIG. Figure 5(a) (3 in bl)
3 is an array substrate on which switching elements and wiring patterns are formed. As is clear from FIG. 5 (al), three independent display areas are formed on the array substrate 33, and the Y-direction signal vA4 is shared.

Usually, the display area is composed of more signal lines in the Y direction than in the X direction. Therefore, in the third embodiment of the present invention, by making the Y-direction signal line common for each display area, the first... Compared to the second embodiment, a liquid crystal display panel can be manufactured with a very small substrate area, and more liquid crystal display panels can be scattered per substrate during film formation. The unit price of liquid crystal display panels can be reduced.

A projection television using a liquid crystal display device using the liquid crystal display panel of the present invention will be described below.

FIG. 6 is a configuration diagram of a projection television. 6th
In the figure, numeral 34 is a liquid crystal display device using the liquid crystal display panel of the present invention, in which three display areas are formed on a - substrate. First, the light from the light source 23 is distributed and made to enter three display areas.

Each display area transmits only the light of a desired pixel area, and the transmitted light is transmitted to the screen 2 by each projection lens.
It is projected onto 2.

In the embodiment of the present invention, the liquid crystal display device 34 using the liquid crystal display panel of the present invention transmits light and projects the transmitted light onto the screen 22, but the invention is not limited to this. For example, as shown in FIG. It is clear that the light may be reflected on the liquid crystal display device 34 and projected onto the screen 22 as shown in FIG.

Further, in the embodiment of the present invention, three independent display areas are formed on one substrate, but the present invention is not limited to this, and it is clear that a plurality of display areas may be used.

Furthermore, although the embodiments of the present invention are expressed as active matrix type liquid crystal display panels in which switching elements are formed in each picture element, it is clear that the liquid crystal display panel of the present invention may be a simple matrix type display panel or the like. It is.

Furthermore, in the embodiment of the present invention, the protruding electrodes 28 are formed on the signal lines all around the periphery of the liquid crystal display panel, but in order to apply signals to the X and Y signal lines of the liquid crystal display panel,
It is clear that only one end of each Y signal line is required.

In addition, although the protruding electrodes are provided on the liquid crystal display panel side, it is clear that they are not necessary if they are provided on the wiring part of the board equipped with the driving IC. It is clear that it may be provided not only on the electrode but also on the wiring part of the board equipped with the driving IC.

Effects of the Invention As described above, in the liquid crystal display panel of the present invention, independent display areas are formed on one substrate, and the display areas have a common X-direction signal line or Y-direction signal line.
Figure d! It is possible to make the distance between each display area shown in FIG. Therefore, the angle represented by the symbol θ2 in FIG. 6 can be made very small, and therefore the screen color hardly changes depending on the viewing angle as in conventional projection televisions. In addition, since each display area is formed integrally on the substrate,
When adjusting color shifts, two-color unevenness, etc. on the screen, three display areas can be adjusted to nine angle positions at once. In particular, since a liquid crystal display panel is manufactured using LSI manufacturing technology, the distance between each display area and the center position are formed with an accuracy of μm or more. The effects of the adjustment described above are enormous, and the adjustment mechanism of the projection television can be significantly reduced, and the adjustment can be easily made in a short time.

Furthermore, when the liquid crystal display panel is an active matrix type liquid crystal display panel, pixel defects when constructing the liquid crystal display device become a problem. The pixel defects often cannot be detected unless a video signal is applied to the liquid crystal display and the liquid crystal display is operated.

In the case of the liquid crystal display panel of the present invention, the liquid crystal display panel is temporarily mounted on a substrate equipped with a driving IC, and is operated by applying a video signal. If a pixel defect has occurred, the liquid crystal display panel may be removed and another liquid crystal display panel may be installed.

By following the steps above, a completely defect-free liquid crystal display panel can be created by permanently bonding a liquid crystal display panel with no pixel defects to a substrate equipped with a driving IC using an electric oven, a heat column, etc., using heat bonding. It can be made.

Furthermore, since the liquid crystal display panel of the present invention uses a common signal line for a plurality of display areas, the number of connection points to the board equipped with the driving IC is the same as that for connecting liquid crystal display panels each having an independent display area. This has the great effect of significantly reducing the installation time and the cost of forming protruding electrodes, etc., compared to the conventional case.

[Brief explanation of the drawing]

FIG. 1(a) is a plan view of a liquid crystal display panel according to the first embodiment of the present invention, and FIG. 1(b) is a plan view taken along the line CC in FIG.
2(a) is a plan view of a liquid crystal display device using the liquid crystal display panel of the first embodiment of the present invention, and FIG. 2(false) is a sectional view taken along line D-- Cross-sectional view along line D', Figure 3 (
a) is a plan view of a liquid crystal display panel according to a second embodiment of the present invention, FIG. 3 (bl is a cross-sectional view taken along the line E-E' in FIG. FIG. 4(b) is a plan view of a liquid crystal display device using the liquid crystal display panel of the second embodiment of the invention.
is a sectional view taken along line FF' in Figure 4(a), Figure 5(a)
5 is a plan view of a liquid crystal display panel according to a third embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along the line GG' in FIG. Fig. 7 is a block diagram of a projection television using a reflective liquid crystal display panel, and Fig. 8 is a block diagram of a projection television using a reflective liquid crystal display panel.
a) (b) and Fig. 9 (a) (mountain) are a plan view and a cross-sectional view of a liquid crystal display device using a conventional liquid crystal display panel, and Fig. 10 is a plan view and a cross-sectional view of a liquid crystal display device using a conventional liquid crystal display panel. FIG. 2 is a configuration diagram of a projection television. 1...Glass substrate, 2...Counter electrode substrate, 3...Y direction signal line, 4...X direction signal line, 5.6... ...Flexible substrate, 7.
8... Board, 9, 10... Drive IC
, 13... Wiring board, 14... Mirror, 15... Half mirror 116, 17, 18.
...Liquid crystal display device, 19.20.21...
・Projection lens, 22...Screen, 23...Light source, 24...Array substrate, 25, 26.27...Counter electrode substrate, 28
...Protruding electrode, 29 ... Conductive bonding layer, 30 ... Wiring board, 31 ... Counter electrode board, 32 ... Wiring Board, 33...
Array substrate, 34...Liquid crystal display device. Name of agent: Patent attorney Toshio Nakao (1 person) Figure 7 771 - Share distribution board Figure 9 Procedural amendment (method) January 1985 Io mouth 1982 Patent application No. 3゜516 2 Invention Name of liquid crystal display panel 3: Connection with Jf I'I [,'? + Patent application Address: 1 Oaza Kadoma, Kadoma City, Osaka Prefecture
006 Address Name (582) Matsushita Electric Industrial Co., Ltd. Representative Akio Tanii 4 Agent 571 Address 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] (1) A matrix type liquid crystal display panel in which a plurality of independent display areas are formed on one substrate, and at least one of an X-direction signal line and a Y-direction signal line of the plurality of independent display areas is A liquid crystal display panel characterized by the following common features: (2) The X-direction signal line and the Y-direction signal line around the liquid crystal display panel have protruding electrodes, and a conductive bonding layer is formed on the protruding electrodes.
) The liquid crystal display panel described in item 2.