JPH04178628A - Liquid crystal panel - Google Patents

Abstract

PURPOSE:To allow the simultaneous formation of black stripes and spacers and to shorten the working time by forming the plural parallel black stripes on one substrate and forming the plural parallel black stripes which intersect orthogonally with each other and come into contact with each other on the other substrate. CONSTITUTION:Plural parallel electrodes 2a, 2b consisting of ITO, etc., and having a picture element width are formed respectively on the substrates 1a, 1b consisting of glass, etc., and photosensitive dyed resins 5a, 5b which are in common use as the black stripes and spacers and are dyed black are patterned to a prescribed thickness between the electrodes. These black stripes are superposed on each other in the state of intersecting the stripes orthogonally with each other. Namely, the black stripes of these two substrates segment the respective picture elements. Oriented films 3a, 3b consisting of polyimide, PVA, etc., are formed on the surfaces of the electrodes 2a, 2b and the circumference of the substrates is sealed by a sealing material 6, such as epoxy. A liquid crystal layer 4 is formed therebetween. The black stripes and the spacers are formed of the same means in this way and, therefore, the producing time for the panel is shortened and the cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a liquid crystal panel, and more specifically to a black stripe and spacer for a liquid crystal panel.

[Conventional technology] Conventionally, display liquid crystal panels have been patterned with metal such as chrome to provide black stripes in the gaps between the pixels in order to prevent leakage from the gaps between the pixels. .

Further, in order to regulate the distance (cell gap) between a pair of substrates to a constant value, spacers have been formed by dispersing spacer particles such as glass beads between the substrates.

[Problem to be Solved] Therefore, the black stripe and the spacer are formed by different means, and each requires different work steps, resulting in double effort.

Also, dispersed spacers may come within the pixel,
In this case, the contrast deteriorates and the display quality deteriorates due to poor alignment. Furthermore, it is difficult to uniformly disperse the spacers within the plane, and there is a problem in that uneven cell gaps are likely to occur.

Therefore, an object of the present invention is to form black stripes and spacers at the same time, thereby reducing the working time required for them. An object of the present invention is to provide a liquid crystal panel that can solve the above-mentioned problems.

[Means for Solving the Problems] In order to achieve the above object, the liquid crystal panel of the present invention has a plurality of parallel black stripes formed on one substrate in a liquid crystal panel having pixels in a matrix,
A plurality of parallel black stripes are formed on the other substrate, substantially orthogonal to the black stripes on the one substrate and in contact with L1, and the black stripes on both claw plates define valley pixels and , is equal to the sum of the heights of both black stripes or the desired cell gear knob.

The black stripes are preferably made of a photosensitive dyed resin dyed black or made of a black photosensitive resin.

[Function] The black stripes divide each pixel and block light leakage from the gaps between the pixels, and at the same time serve as spacers that keep the cell gap between both claw plates constant.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

First, the structure of the liquid crystal panel will be explained using FIG. 1. In the figure, the subscript a indicates one substrate side, and the subscript s indicates the other substrate side.

A plurality of parallel electrodes 2a made of ITO or the like each having a pixel width are provided on substrates 1a, lb made of glass or the like.

Between the electrodes, photosensitive dyed resins 5a and 5b dyed black, which also serve as black stripes and spacers, are buttered to a predetermined thickness.

As the photosensitive dyeing resin 5a, for example, CFP8006P
(manufactured by Chisso Co., Ltd.) can be used, and as a black dye, for example, Buta 1900551 (manufactured by Honkayaku Co., Ltd. H-) can be used.

These black stripes are superimposed to be perpendicular to each other, and the black stripes on both claw plates partition each pixel. Alignment films 3a and 3b made of polyimide, PVA, etc. are formed on the electrodes 2a, 2b, and the periphery of the substrate is sealed with a sealing material 6 such as epoxy.
Inside thereof is a liquid crystal layer 4.

Next, a method for manufacturing the above liquid crystal panel will be explained.

First, a plurality of transparent electrodes 2a are formed in parallel on the substrate 1a in alignment with pixel positions. A predetermined gap exists between the transparent electrodes 2a (FIG. 1).

Next, a photosensitive dyed resin 5a is applied onto the transparent electrode 2a by a spin code method or the like to a thickness that is half the cell gap (FIG. 3).

Next, by photolithography, the dyed resin 5a is patterned so that it is located only in the gap between the electrodes (FIG. 4). As a result, the dyed resin 5a on the electrode 2a is removed.

Then, the dyed resin 5a patterned in the gap between the electrodes is dyed with black dye to form black stripes (FIG. 5).

Thereafter, a liquid crystal alignment film is applied and an alignment treatment such as rubbing is performed (FIG. 6).

The other substrate 1b is also manufactured by the same method as described above (FIG. 7). Note that the photosensitive dyeing resin 5b is also applied to the other substrate 1b to a thickness that is half the desired cell gap.

Then, one substrate 1a and the other substrate 1b (FIG. 7)
so that the electrodes are perpendicular to each other, and both dyed resins 5a,...
5b are in contact with each other, and the outer periphery of the panel is sealed with a sealing material 6, leaving the liquid crystal injection lower part (FIG. 8).

After injecting the liquid crystal 4 from the liquid crystal injection lower, the liquid crystal injection 1]7 is cooled to complete the display liquid crystal panel shown in the first figure.

In the above examples, the black stripes were obtained by dyeing the photosensitive dyed resin black, or the black stripes were obtained by dyeing the photosensitive dyed resin black.
For example, a photosensitive resin in which a black dye or pigment is dispersed from the beginning may be used, and in the second case, dyeing J2 is not necessary.

Furthermore, in the above embodiment, the height of the dyed resin on each substrate was set to half the cell gap, but the height of the dyed resin on one board was set to a predetermined height, and the height of the dyed resin on the other board was set to the desired height. The height may be determined by subtracting the height of the dyed resin on one substrate from the cell gap.

Further, although the above embodiment is a simple matrix type liquid crystal panel, various other types of electrode patterns may be considered.

For example, one substrate side may have a plurality of parallel band-shaped electrodes passing through a plurality of pixels having a pixel width as described above, and the other substrate side may have rectangular segment electrodes that are independent for each pixel. In this case, the black stripes on the other board are formed in the form of a mesh, or in this case (also in this case, a plurality of black stripes on one board side) orthogonal to the black stripes on the other board. It has a plurality of black stripes on the other substrate side and is within the scope of the present invention.

Furthermore, the present invention can be implemented in various other embodiments, such as printing the 14-marking mark on the outer periphery of one substrate by a method such as slurry 2 printing, and then bonding the two substrates together.

The present invention is particularly effective in liquid crystal panels for color display and liquid crystal panels using ferroelectric liquid crystals with narrow substrate spacing.

[Effects] According to the present invention, the black stripe and the spacer are formed by the same means, so that the manufacturing time of the panel can be reduced and the cost can be reduced.

Furthermore, since the spacers are not present within the operating range of the liquid crystal, the contrast is increased, display quality is improved, and unevenness in the C1 cell gap can be prevented because the spacers are uniformly present within the panel surface.

The black stripe can block light from the tip leakage, 2]'J
Trust or soil.

Furthermore, when manufacturing a ferroelectric liquid crystal panel, conventional methods of dispersing spacer particles cause alignment defects due to the influence of the spacers, but in the present invention, there is no spacer within the pixel, so there is no concern about alignment defects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a liquid crystal panel according to an embodiment of the present invention, FIGS. 2 to 8 are explanatory diagrams showing manufacturing steps for manufacturing the liquid crystal panel of FIG. Figure 6 is an explanatory diagram showing the first step of manufacturing one of the substrates, and Figures 2 (a) and (b)
3 is a front view and a plan view of a state in which electrodes are formed on a substrate, respectively, FIG. 3 is a front view of a state in which photosensitive dyed resin is applied, and FIG. 4 is a state in which patterning is made between the electrodes of photosensitive dyed resin. The front view, FIGS. 5(a) and 5(b) are respectively a front view and a plan view of a state in which the photosensitive dyed resin is dyed black,
Figure 6 is a front view of the state in which the alignment film has been applied, Figure 7 is a front view of the other substrate manufactured in steps 1 and 2 in the same manner as in section 2, and Figure 8 is a plane view of one substrate and the other substrate bonded together. It is a diagram. a... One substrate, b... Other substrate, a... Black stripe on one substrate, b... Black stripe on the other substrate. Applicant Seikosha Co., Ltd.

Claims (3)

[Claims] (1) In a liquid crystal panel having pixels in a matrix, a plurality of parallel black stripes are formed on one substrate, and a plurality of parallel black stripes are formed on the other substrate, substantially perpendicular to the black stripes on the one substrate and mutually A plurality of abutting parallel black stripes are formed, the black stripes on both substrates partition each of the pixels, and the sum of the heights of the black stripes is equal to a desired cell gap. LCD panel. (2) The liquid crystal panel according to claim 1, wherein the black stripe is formed by dyeing a photosensitive dyed resin black. (3) The liquid crystal panel according to claim 1, wherein the black stripe is made of a black photosensitive resin.