Tohoku University

Other

Kuraray Co., Ltd.

Sharp Corporation

Foundation for Advancement of International Science

Tadahiro Ohmi

Kiwamu Takehisa

Shigetoshi Sugawa

Yasuyuki Shirai

Yuichiro Yamada

Tokihiko Shinomiya

Toshiaki Sato

Mitsuo Matsumoto

Takashi Ishizumi

Ikuo Onishi

Tokuo Ikari

Etsuo Nakazato

Yuhsaku Ajichi

Kimio Yanagida

A large liquid crystal display () comprises a light guide plate () arranged on the back side of a liquid crystal panel (). The front surface of the light guide plate () is flat, while the back surface thereof is concave. The upper and lower end faces of the light guide plate () respectively facing hot cathode fluorescent lamps () have a convex shape projecting toward the respective lamps. White light from the fluorescent lamps is incident on the upper and lower end faces of the light guide plate directly or by being reflected by reflectors (), and propagates within the light guide plate while being reflected by the front and back surfaces of the light guide plate. At the front surface of the light guide plate, a part of the white light is directed toward the back side of the liquid crystal panel () by a light guide portion ().

Liquid crystal display and light guide plate

As a shape on a cross-section vertical to a longitudinal direction (L) of the hot cathode fluorescent lamp (()), a light source rear side reflecting plane () of a reflector () includes a mound portion (). The mound portion () is defined by two recessed inclining planes and protrudes toward a hot cathode fluorescent lamp (()).

Backlight unit for liquid crystal display

In a pattern writing method for writing a pattern on a substrate by the use of projection patterns output from a mirror device including two-dimensionally arranged micromirrors, exposure is implemented by ON/OFF controlling each micromirror and partly overlapping the projection patterns from the mirror device at least in a one-dimensional direction, thereby accurately controlling the exposure of intermediate amounts of light.

Pattern writing system and pattern writing method

Laser light in a pattern reflected by a two-dimensional array micromirrorthat is controlled on the basis of mask data of a mask pattern data output deviceforms an enlarged pattern. This enlarged pattern is projected in a reduced manner onto a mask substratethrough a reduction-projection optical system, thereby forming a lithography pattern. Since a large number of patterns are written in an instant by the two-dimensional array micromirror, a time required for lithography the entire mask pattern is extremely shortened as compared with a conventional one. As a result, the mask cost can be largely reduced.

Mask making method, mask making device, and mask drawing device

Growing community of inventors

Miyagi, Japan

Kiwamu Takehisa