Alps Electric Co., Ltd.

Toshiyuki Teshirogi

Tatsuya Moriike

Hideharu Watanabe

Katsutoshi Uwami

A full-color liquid crystal display which is simple in construction and low in costs, also providing high quality of display performance. The liquid crystal display has a color filter substrate, an opposing substrate, and a liquid crystal charged between both the substrates. The color filter substrate includes a transparent substrate. A transparent electrode is mounted on one surface of the transparent substrate. A color filter is electro-deposited on the transparent electrode. A light-shielding film is formed in clearances provided for the color filter. An inorganic dielectric film is mounted on the surfaces of the color filter and the light-shielding film. A transparent electrode film is deposited on the dielectric film. On the other hand, the opposing substrate is constructed of a transparent substrate and a transparent electrode adhering to one surface of the substrate. As the liquid crystal, a nematic liquid crystal whose molecular longer axis is progressively twisted at 90.degree. between the transparent electrode films provided for the color filter substrate and the opposing substrate, respectively, is charged.

Liquid crystal display having an SiO.sub.2 flattening layer

A color filter is manufactured in the steps described below. 1 A plurality of transparent electrodes which extend in a straight line at fixed pitch intervals are formed on one surface of a transparent board: 2 color filters of a plurality of colors are stacked on transparent electrodes in a predetermined sequence: 3 a high energy beam is scanned at fixed pitch intervals in a direction intersecting at right angles to the extension direction of the transparent electrodes in order to selectively remove the transparent electrodes and the color filters, or only the color filters: 4 a black resist is coated onto that surface of the transparent board where the transparent electrodes are formed, light for exposing the black resist is irradiated from the back of the transparent board, and the black resist layer coated onto an area other than the color filter formation portion is exposed: 5 the exposed transparent board is developed to selectively remove the unexposed black resist coated on the color filters, and thus a light-shielding film is formed around the color filter. In this case, when the unexposed black resist is removed by using laser light with a short wavelength of 380 nm or less as the high energy beam, removal at the same width is made possible regardless of the color of the color filters, and processing quality is improved.

Method of manufacturing color filters

A liquid crystal display element having a liquid crystal cell formed by bonding a pair of transparent substrates, and a polarizing plate disposed at least outside of the transparent substrate of display surface comprising a Cr.sub.2 O.sub.3 thin film formed 300 to 1000 Angstroms thick on the outer surface of the transparent substrate of the display surface. Thus, the liquid crystal display element can effectively prevent a dazzlement due to the reflection of an external light on the surface of a transparent substrate of display surface side.

Growing community of inventors

Fukushima-ken, Japan

Toshiyuki Teshirogi