JP2576468B2 - Liquid crystal display - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display having a color filter used for a liquid crystal color image display cell in combination with a substrate using a liquid crystal driving element.

[Prior Art] A conventional color filter having a light-shielding portion is one in which the light-shielding portion is formed only on an image display portion (FIG. 5 22) for lighting images and characters. This means that, for example, when viewing a display using a backlight, the backlight transmits through a transparent electrode (ITO or the like) directly driving the liquid crystal on the opposite substrate regardless of the lighting state, thereby lowering the display contrast. It was to prevent that.

Therefore, in the conventional liquid crystal display, as shown in FIG. 4, a gap 20 is formed between the lighting and the product that stores the display, which is called parting, and light leaking from the gap degrades the display quality when the panel is lit. For this reason, light is shielded by printing the gap 20 using black ink.

[Problems to be Solved by the Invention] For this reason, the printing process has entered the cell manufacturing process, which has been a factor of reducing the cleanliness in the factory. In addition, the number of steps required for manufacturing the panel is increased, which is a factor of high cost. An object of the present invention is to provide a high-quality color filter that can easily solve such conventional problems.

[Means for Solving the Problem] The liquid crystal display of the present invention comprises liquid crystal sandwiched between a pair of substrates having electrodes on opposing inner surfaces of the substrates, and the pair of substrates are formed on the inner surfaces of the substrates. In a liquid crystal display body having an image display portion formed in a region surrounded by a seal portion where the seal is formed, the liquid crystal display body being surrounded by the seal portion, and being inside the seal portion, A light-shielding film is formed on the inner surface of the substrate in a region surrounding the entire periphery of the image display unit.

In addition, liquid crystal is sandwiched between a pair of substrates having electrodes on the inner surfaces of the opposing substrates, and the pair of substrates is bonded by a seal formed on the inner surface of the substrate, and is surrounded by a seal portion on which the seal is formed. A liquid crystal display body having an image display section having a plurality of pixels in an area to be surrounded, wherein the area is surrounded by the seal section, is inside the seal section, and surrounds the entire periphery of the image display section. And a light shielding film is formed on an inner surface of the substrate in a region between the adjacent pixels.

Further, the light-shielding film is formed of a metal thin film.

Further, the light-shielding film is formed of a resin.

Example FIG. 1 is a front view of a liquid crystal display of the present invention. The entire periphery of the image display unit 1 is not a light-shielding portion, but the light-shielding portion is removed from an adhesive portion called a seal portion 3 necessary for assembling with the counter substrate. This is effective for avoiding a decrease in the adhesion strength of the seal portion 3 due to the presence of the dye substrate, in a case where the light shielding portion is formed by dyeing a dye substrate called a dyeing method when forming the light shielding portion. Because there is.

FIG. 4 shows the configuration of a liquid crystal display. In FIG. 4, a color filter 14 is provided on one surface of the transparent substrate 8.
Are formed separately from red (R), green (G), and blue (B). The pixel electrode 2 is formed on the TFT substrate facing the transparent substrate 8. When viewed from above the transparent substrate, the display pixels are arranged in a matrix. A light-shielding film is formed around the display pixels, that is, around the color filter and the non-image display portion. Therefore, the present invention has a configuration in which a light-shielding portion is removed from a portion where the transparent substrate 8 and the TFT substrate 7 are joined by a sealing material as shown in FIG.

Next, FIG. 2 shows an application example of the present embodiment. FIG. 2 is a view in which all areas other than the image display section 1 are shielded from light. That is, a light-shielding portion that shields the periphery of the pixel on the substrate is formed, and at the same time, a light-shielding portion is formed around the image display portion or a portion where no image is displayed.

Next, another application example of the present embodiment is shown in FIG. As shown in FIG. 3, the periphery of the image display unit 1 is a light-shielding portion except for the light-shielding portion by the width of the dicing line portion 6, and
It is cut along the dicing line portion 6 as shown in FIG. Here, dicing line 6
When the transparent substrate on which the image display unit 1 and the light-shielding portion are formed is cut out from the manufacturing substrate 5 from which a large number of pieces have been formed, the metal film forming the light-shielding portion by rotary cutting of a dicing blade This is to prevent the nickel (chromium, chromium, etc.) or the staining substrate from coming off during dicing.

Further, the structure of the light-shielding portion can be described by a metal thin film, a dyeing method, and a printing method.

There are two methods using a metal thin film. First, a chromium dioxide film is formed by vapor deposition or sputtering. Next, a nickel film is formed by a plating method.

In the case of dyeing, there is a method of forming a dye substrate such as gelatin with a black dye, or a method of laminating a layer dyed with a red dye and a layer dyed with a blue dye on a dye substrate.

In the printing method, the black ink can be formed by printing on a light-shielded portion.

As described above, in any of the methods, the same effects can be obtained in the present invention. Although the light-shielding portion shown in this embodiment is formed directly on one surface of the transparent substrate, the present invention is not limited to this, and may be on a color filter or a transparent conductive film.

[Effects of the Invention] According to the present invention, a light-shielding film is formed on the inner surface of the substrate in a region that is surrounded by and inside the seal portion and that surrounds the entire periphery of the image display portion. Thereby, the adhesion strength of the seal portion can be improved.
Further, since there is no increase in the number of members interposed between the seal and the substrate, a more precise substrate interval can be obtained.

Therefore, with high display quality and strength and accuracy,
A liquid crystal display is obtained.

In addition, by forming a light-shielding film between adjacent pixels, light leakage in a display region can be prevented, and contrast can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a liquid crystal display showing one embodiment of the present invention. FIG. 2 is a front view of a liquid crystal display showing an application of the present embodiment. FIG. FIG. 4 shows a structure of a liquid crystal display. FIG. 5 shows a display of a conventional liquid crystal display. 1... Image display 2... Shield 3. … Seal part 4… Light-shielding part excluding the seal part 5… Manufacturing substrate 6… Dicing line part 7… TFT substrate 8… Transparent substrate 9… Seal 10… Liquid crystal 11… Polarizing plate 12… Pixel electrode 13 Source line 14 Color filter 15 Protective film 16 Transparent conductive film 17 Light-shielding part 18 Non-image display part 19 Opening of case 20 Image display part and case Clearance between the openings of the color filter 21 ... The outer shape of the color filter 22 ... Image display

Claims (4)

(57) [Claims] 1. A liquid crystal is sandwiched between a pair of substrates having electrodes on opposing inner surfaces of a substrate, wherein the pair of substrates are bonded by a seal formed on the inner surface of the substrate, and the seal is formed by the seal. A liquid crystal display body having an image display portion formed in a region surrounded by the portion, wherein the liquid crystal display body is surrounded by the seal portion, is inside the seal portion, and surrounds the entire periphery of the image display portion. A liquid crystal display comprising a light-shielding film formed on an inner surface of a substrate. 2. A liquid crystal is sandwiched between a pair of substrates having electrodes on opposing inner surfaces of a substrate, wherein the pair of substrates are bonded by a seal formed on the inner surface of the substrate, and the seal is formed. In a liquid crystal display formed by forming an image display section having a plurality of pixels in a region surrounded by the section, the liquid crystal display section is surrounded by the seal section, is inside the seal section, and has an entire periphery of the image display section. A light-shielding film formed on the inner surface of the substrate in a region surrounding the pixel and in a region between the adjacent pixels. 3. The liquid crystal display according to claim 1, wherein said light shielding film is formed of a metal thin film. 4. The liquid crystal display according to claim 1, wherein said light shielding film is formed of a resin.