JPS60249121A - Preparation of color liquid crystal panel - Google Patents

Abstract

PURPOSE:To arrange the position of a color filter pattern and a fine electrode pattern without causing shift of the position with high accuracy and to obtain a color liquid crystal panel having high quality by pasting a white/black liquid crystal and a filter glass having a fine-patterned colored film with an ultraviolet ray setting resin. CONSTITUTION:A laminated glass contg. no bubbles is prepd. by laminating a cell glass 3 of a white/black panel on a filter glass substrate 6 with an ultraviolet ray setting resin having low viscosity dropped on both glass plates. In this state, the white/black panel and the filter glass are pressed to spread the adhesive layer 4 and positioning of the filter glass pattern and fine electrode pattern of the white/black panel is executed while observing with a positioning microscope. Since the adhesive layer is spread to a thin film, no shifting of the position is caused even if the pressure is removed, and the adhesive is hardened by irradiating with ultraviolet rays in this condition. Further, if ultraviolet rays sources are provided to above and below the color liquid crystal panel in order to prevent unevenness of irradiation intensity by the fine film patttern of the collor filter and a metallic thin film of the white/black panel, and if simultaneous irradiation is executed, shift of position is not caused at all. By this method, a color liquid crystal panel having high precision is obtd. securely.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a color liquid crystal panel, and particularly relates to a method for manufacturing a color liquid crystal panel using a thin glass or plastic film with a pattern of fine electrode films. .

[Background of the invention]

Several methods have already been proposed for displaying colors using liquid crystals, and among them, 50μ to 300μ microelectrodes such as transparent conductive films and metal thin films are attached onto filter glass with a microscopic colored film. A color liquid crystal panel has been proposed that has a structure in which thin glass sheets of about 100 mL are installed so that the filter pattern and electrode pattern match. Since the structure of this color liquid crystal channel has electrodes formed on top of the color filter, it does not reduce the steepness of the liquid crystal and enables high time division driving using voltage averaging. Also, 2
Compared to the structure of a color liquid crystal panel in which a colored film of about μ size is formed, the driving voltage can be reduced by about 30% to 40%, and it is also compatible with low power consumption 0MO8 driving ICs. Furthermore, the color LCD panel using thin glass,
Since the color filter layer and liquid crystal layer are completely separated by glass, interaction between the liquid crystal and filter membrane is completely prevented.
A highly reliable color liquid crystal panel can be provided.

In addition to the above-mentioned high time division drive liquid crystal panel, the color liquid crystal panel using this structure also uses TPT in the liquid crystal cell base.
It can also be applied to active matrix panels that integrate nonlinear elements such as , MIM, and diodes. For the above reasons, a color liquid crystal panel using thin glass is a very useful structure for displaying color on a liquid crystal panel, and there is currently a need for a reliable method for manufacturing it.

[Prior art and problems] The method for creating a color liquid crystal panel using thin glass is to first assemble a black and white liquid crystal panel, and then glue the filter glass with a finely colored film on using adhesive. However, it is difficult to attach color filter glass to a black and white panel with good positional accuracy using ordinary adhesives and bonding methods. For example, if a thermosetting epoxy resin is used as an adhesive, strong adhesion can be obtained, but the viscosity of the adhesive decreases before it hardens, so when the black and white LCD panels are aligned and glued together, The filter glass moves and becomes misaligned. The above also occurs when a color liquid crystal panel is assembled using a single color liquid crystal cell glass in which a color filter is laminated to a thin plate glass with a microelectrode film pattern, and these methods are used to reliably produce color liquid crystal panels. That is very difficult.

[Purpose of the invention]

The purpose of the present invention is to improve the drawbacks of the manufacturing method of color liquid crystal panels using thin glass as described above, to arrange color filter patterns and fine electrode patterns with high precision without positional deviation, and to produce high quality color liquid crystal panels. An object of the present invention is to provide a method for manufacturing a liquid crystal panel.

[Embodiments of the invention]

Example 1 FIG. 1 is a schematic cross-sectional view of a color liquid crystal panel.

A filter glass substrate 6 to which a fine colored film 5 is attached is adhered to a black and white panel before liquid crystal injection, which is made up of two liquid crystal cell glasses 1.6 to which a transparent conductive film and a metal thin film are finely adhered, and a sealant 2. They are glued together via layer 4. As an adhesive for the adhesive layer in Figure 1 &'! ,
Using a low viscosity ultraviolet curable resin of 5.0' OCP S or less, drop the ultraviolet curable resin onto both the cell glass 6 and filter glass substrate 60 of the black and white panel and glue them together. can. moreover,
In that state, attach the adhesive layer 4 to the black and white panel and filter glass.
While applying a load of about 5 K and 0.15 Kf/ct, align the filter glass pattern and the fine electrode pattern of the black and white panel using a microscope, and then continue applying pressure for about 10 minutes to tighten the adhesive layer to 10μ. to a certain degree. In this state, the adhesive layer becomes a thin liquid film, so even if the load is removed, positional displacement does not occur, and the adhesive can be directly irradiated with ultraviolet rays to cure the adhesive. In addition, in order to prevent uneven irradiation intensity due to the fine film pattern of the color filter or the thin metal film of the black and white panel, the ultraviolet light sources are installed on both the top and bottom of the color LCD panel, and when UV light is irradiated at the same time, the adhesive begins to harden immediately and the position No discrepancies occur at all. If a color liquid crystal panel is manufactured by the above method, a highly accurate color liquid crystal panel can be reliably manufactured.

Example 2 The method described in Example 1 makes it relatively easy to assemble a black and white panel using a substrate of thin glass with a fine electrode pattern if the thickness is about 300 μm. If it is less than that, the glass will easily break and it will be difficult to assemble the panel. FIG. 2 is a schematic cross-sectional view of a color liquid crystal cell glass, in which a thin liquid crystal cell glass 6 to which a fine electrode film 7 is attached is glued together via an adhesive layer 4 on a filter glass substrate to which a fine colored film 5 is attached. ing. The adhesive used is the low-viscosity ultraviolet curable resin described in Example 1, and ultraviolet rays are simultaneously irradiated from both the upper and lower sides of the aligned and bonded color liquid crystal cell glasses to effect curing and bonding. Note that the adhesive layer is usually 10
As shown in Figure 4, if the thickness is sufficiently thin to approximately μ, the adhesive will protrude, so make the filter glass substrate and thin plate glass larger than the specified color liquid crystal cell glass in advance, and after curing and bonding, the adhesive layer will be attached to the IC. A thin cutting grindstone that rotates at high speed, used for cutting, etc., is used to cut grooves into the desired size of color liquid crystal cell glass. Assembling a color liquid crystal panel using the color liquid crystal cell glass produced as described above can be done as easily as assembling a monochrome liquid crystal panel. Note that this method can reliably produce a color liquid crystal panel even if the thin plate glass with a fine electrode pattern has a structure of 200 μm or less.

Example 3 In the case of Example 2, when the thin glass with a microelectrode pattern is very thin with a thickness of 50μ or less, or when the size of the thin glass is 6 inches square or more, patterning the microelectrodes on the thin glass. That means 1.1 m
It is difficult to handle because it is difficult to handle compared to ordinary plate glass with a thickness of about 1.5 m. FIG. 3 shows a sheet of cell glass 6 on which an electrode film 7 such as a transparent conductive film or a metal thin film is attached to the entire surface of the filter glass substrate on which a fine colored film 5 is adhered, via an adhesive layer 4. FIG. 2 is a schematic cross-sectional view of a glass substrate of FIG. In this case, there was no need to align and glue them together, so a thermosetting epoxy resin with strong adhesive strength was used. This is also because when bonded glass substrates are finely patterned by etching to produce color liquid crystal cell glass, they are less likely to be attacked by etching liquid. As described in Example 2, a color liquid crystal panel can be easily assembled using the color liquid crystal cell glass on which a finely patterned electrode film is formed by etching as described above. Therefore, it is possible to reliably manufacture color liquid crystal panels using fairly thin glass.

〔Effect of the invention〕

As described above, if a color liquid crystal panel using thin glass is produced using the method of the present invention, color liquid crystal panels using all types of thin glass can be manufactured relatively easily and accurately and reliably. I can do it. In the above embodiments, glass substrates were used as examples of liquid crystal cell glasses and filter glass substrates, but the present invention can also be applied to plastic film substrates.

[Brief explanation of drawings]

1 to 4 are schematic sectional views explaining the present invention in detail. 1...Liquid crystal cell glass, 2...Sealant, 6
... Thin liquid crystal cell glass with fine pattern electrodes, 4 ... Adhesive layer, 5 ... Fine colored film, 6
...Filter glass substrate, 7... Electrode film. Patent Applicant Citizen Watch Co., Ltd. Figure 1 Figure 3 Figure 4 Procedural Amendment 1. Indication of the case 1982 Patent Application No. 105589 2, Name of the invention Method for manufacturing color liquid crystal panels 3, Person making the amendment What is the case? Patent applicant address 2-1-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Telephone (03) )
342-1231 spontaneous 1G-

Claims (3)

[Claims] (1) In the manufacturing process of a color liquid crystal panel using thin glass with a fine electrode pattern, a black and white liquid crystal panel before liquid crystal injection and a filter glass with a fine patterned colored film are glued together using ultraviolet curing resin. A method for manufacturing liquid crystal panels. (2) In the manufacturing process of color liquid crystal panels using thin glass with a microelectrode film pattern, a single color liquid crystal cell is produced by laminating a filter glass with a microscopic colored film onto a liquid crystal cell glass with a microelectrode film using ultraviolet curing resin. A method for manufacturing a color liquid crystal panel, which comprises assembling the color liquid crystal panel using glass. (3) In the manufacturing process of a color liquid crystal panel using thin glass with a microelectrode film pattern, thin glass with a transparent conductive film and thin metal film coated on the entire surface and filter glass with a microscopic colored film are laminated with thermosetting resin. A method for manufacturing a color liquid crystal panel, which comprises assembling a color liquid crystal panel using color liquid crystal cell glass in which fine electrodes are formed by etching a single glass substrate.