发明名称 |
LIGHT GUIDE PLATE, SURFACE LIGHT SOURCE DEVICE AND TRANSMISSION TYPE DISPLAY DEVICE |
摘要 |
PROBLEM TO BE SOLVED: To provide a fine light guide plate capable of sharply improving moire and having high in-plane uniformity of brightness, a surface light source device including the light guide plate and a transmission type display device including the surface light source device.SOLUTION: A plurality of rear side unit optical shapes 133 are mutually adjacently arrayed on a rear surface 13d of a light guide plate 13 in an array direction approximately in parallel with a light guide direction of light. Each of the rear side unit optical shapes 133 is an approximately quadrangular prism shape projected to the rear side and includes a top surface part 133c, a first slope part 133a and a second slope part 133b, an array pitch P1 of the rear side unit optical shape 133 is fixed, and when it is defined that a dimension of the top surface part 133c in the array direction is Wc, a ratio Wc/P1 is gradually reduced in proportion to separation from a light incident surface 13a in the array direction. |
申请公布号 |
JP2014038747(A) |
申请公布日期 |
2014.02.27 |
申请号 |
JP20120179601 |
申请日期 |
2012.08.13 |
申请人 |
DAINIPPON PRINTING CO LTD |
发明人 |
GOTO MASAHIRO;SEKIGUCHI HIROSHI |
分类号 |
F21S2/00;F21Y101/02;G02B5/04;G02F1/13357 |
主分类号 |
F21S2/00 |
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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