Kabushiki Kaisha Toshiba

Toshiba Materials Co., Ltd.

Yukihiro Takenami

Michiyasu Komatsu

Yoshiyuki Fukuda

Minoru Takao

Hisao Yabe

Tsutomu Ishii

Yasuhiro Shirakawa

Hajime Takeuchi

Yasumasa Ooya

Isao Ikeda

Kimiya Miyashita

Katsuhiro Shinosawa

Hiroki Tonai

A backlight unitincludes a plurality of light emitting devicesconstituted with, for example, LED lamps, and an optical sheetdisposed on light emission surfacesides of the light emitting devices. The light emission surface sides of the plural light emitting devices are joined to the optical sheetvia joining layers. The backlight unitsatisfies a condition of n&#x2266;n&#x2266;n, where nis a refractive index of the optical sheet, nis a refractive index of the joining layer, and nis a refractive index of the light emitting device

Backlight and liquid crystal display using same

Wear resistant member for electronic equipment comprises a silicon nitride sintered body that contains conductivity enhancing particles, and has electrical resistivity in the range from 1 to 10 &OHgr;&middot;m. In silicon nitride sintered body, agglomeration of conductivity enhancing particles in which distance between conductivity enhancing particles is less than 1 &mgr;m exists by 30% or less by area ratio per unit area. Wear resistant member is used for a bearing ball or the like, being applied in a rotation actuator of electronic equipment such as a magnetic recorder and optical disk drive. Malfunction of electronic equipment due to static electricity may be cancelled due to electrical resistivity that silicon nitride sintered body has.

Wear resistant member for electronic equipment, and bearing and spindle motor therewith

Wear resistant member for electronic equipment comprises a zirconium oxide sintered body of which specific resistance is in the range from 1 to 10 &OHgr;&middot;m. A conductivity enhancer of which specific resistance is 10 &OHgr;&middot;m or less is compounded to a zirconium oxide sintered body to materialize specific resistance from 1 to 10 &OHgr;&middot;m. For a conductivity enhancer, carbides and nitrides of various kinds of metals can be used. Wear resistant member can be used as a bearing ball, being applied in a rotational driver of electronic equipment such as a magnetic recording device and an optical disk device. Deficiency due to static electricity of electronic equipment is cancelled due to specific resistance that a zirconium oxide sintered body has.

Wear resistant member for electronic equipment and bearing and spindle motor therewith

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Tokyo, Japan

Yukihiro Takenami