发明名称 |
OPTICAL ELEMENT, PLANAR LIGHTING DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE |
摘要 |
PROBLEM TO BE SOLVED: To provide an optical element that improves frontal brightness of a planar lighting device using planar lighting elements having isotropic light emitting characteristics. SOLUTION: A luminance improving film 5 is arranged on a glass substrate 10 of an organic electric field light emitting element 4 with the incident plane 6 closely stuck to the film 5. A plurality of projecting parts 7 is arranged on the opposite side of the incident plane 6 of the brightness improving film 5. A projecting part 7 is a circular truncated cone, and around one arbitrary projecting part 7, 6 pieces of the other projecting parts 7 are arranged so as to come into contact with the former one. The light made incident on the brightness improving film 5 almost vertically to the incident plane 6 is emitted from the top face 9 of the projecting part 7 almost without being refracted. On the other hand, the light made incident on the brightness improving film 5 tilted to the incident plane 6 is refracted so as to get closer to the normal line of the incident plane 6 on the ridge surface 12 of the projecting part 7 and emitted. Thus, the frontal brightness is improved. COPYRIGHT: (C)2004,JPO&NCIPI
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申请公布号 |
JP2004233957(A) |
申请公布日期 |
2004.08.19 |
申请号 |
JP20030164238 |
申请日期 |
2003.06.09 |
申请人 |
TOYOTA INDUSTRIES CORP |
发明人 |
TAKEUCHI NORIHITO;ISOTANI BUNICHI;MITA YASUCHIKA;NIIDA HIDENORI |
分类号 |
G02B5/04;F21V8/00;G02F1/13357;H01L51/50;H05B33/02;(IPC1-7):G02B5/04;G02F1/133;H05B33/14 |
主分类号 |
G02B5/04 |
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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