发明名称 |
BACKLIGHT DEVICE FOR DISPLAY APPARATUS |
摘要 |
A backlight device suitable for illuminating a transmission-type display device, such as a liquid crystal device, is constituted by a reflection member for reflecting light, a transmission member disposed opposite to the reflection member so as to form a space from the reflection member, and a light source disposed to emit light into the space. Light issued from the light source into the space is reflected by the reflection member and transmitted through the transmission member. The transmission member is preferably provided with a reflection layer having apertures having an aperture ratio which increases with an increase in distance from the light source toward a center of the space in a linear function, a hyperbolic function or a function intermediate therebetween of the distance from the light source. Between the transmission member and the display device, a prism sheet and/or a diffusion sheet may be disposed so as to improve the frontal illumination performance.
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申请公布号 |
CA2150340(C) |
申请公布日期 |
1998.12.01 |
申请号 |
CA19952150340 |
申请日期 |
1995.05.26 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
KUREMATSU, KATSUMI;ONITSUKA, YOSHIHIRO;KANDA, TOSHIYUKI |
分类号 |
G02B6/00;F21V5/02;F21V7/00;F21V8/00;F21V11/14;F21V13/14;G02B27/28;G02F1/1335;G02F1/13357;G09F9/00;(IPC1-7):F21V7/12;F21V13/04;F21V13/08;G09F13/12 |
主分类号 |
G02B6/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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