Method for manufacturing color filter

Abstract

The main object of the present invention is to provide a method for manufacturing a color filter, capable of having the surface of the pixel part flatly even in the case a pixel part is formed by an ink discharging method, and the thickness of each pixel part evenly. In order to achieve the above-mentioned object, the present invention provides a method for manufacturing a color filter comprising at least a pixel part forming process of forming a pixel part of a plurality of colors in a predetermined pattern by adhering an ink on a transparent substrate by a discharging method, and the convex pixel part is formed in the pixel part forming process, wherein a pixel part flattening process of flattening the convex pixel part is executed after the pixel part forming process.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method for manufacturing a color filter suitable for a color liquid crystal display, capable of obtaining an even pixel part even in the case the pixel part is formed by an discharging method such as an ink jet method. [0003] 2. Description of the Related Art [0004] Recently, accompanied by development of the personal computers, in particular, development of the portable personal computes, demand to liquid crystal displays, particularly color liquid crystal displays tends to be increasing. However, since color liquid crystal displays are expensive, decrease of the cost is highly requested. In particular, decrease of the cost of color filters, which accounts for a large proportion in terms of the cost, is highly requested. [0005] In general, such color filters comprises coloring pattern of the three primary colors of red (R), green (G) and blue (B). A liquid crystal functions as a s...

AI Technical Summary

Benefits of technology

The present invention provides a method for manufacturing a color filter with even pixel parts surface and thickness, and without color unevenness or cell gap unevenness. This is achieved by flattening the convex pixel part after its formation in a pixel part forming process. The method can be used with both a color filter with and without a light shielding part. The flattening process can be executed by applying pressure from above or using a cylinder pressure roll or a plane press. The ink used in the method can be inkjet, and the wettability of the layer can be changed by energy irradiation. The method also allows for the formation of an ink-philic area with a small contact angle with a liquid, which is advantageous in terms of cost. The photocatalyst containing layer used in the method can be titanium oxide, zinc oxide, tin oxide, strontium titanate, tungsten oxide, bismuth oxide, or iron oxide. The binder used in the layer can be organo polysiloxane or a co-hydrolyzed or hydrolyzed condensation product of silicon compounds. The contact angle with a liquid on the layer should be 10 degrees or more without energy irradiation and less than 10 degrees with energy irradiation.

Problems solved by technology

However, since color liquid crystal displays are expensive, decrease of the cost is highly requested.

However, according to the method, since the ink is adhered on the lyophilic area utilizing the wettability difference, the central part of the pixel part is formed inevitably in a convex form.

There is a problem that there is a risk of generating the color unevenness in the pixel part if the pixel part is provided in such a convex form.

Furthermore, a problem of unevenness of the cell gap is also involved.

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