Title:
有機エレクトロルミネッセンス表示素子
Document Type and Number:
Japanese Patent JP4053260
Kind Code:
B2
Abstract:
In a luminous display element, a retro-reflector is provided on the back side of an organic EL layer which includes an emission layer whose state changes between an emission state and a non-emission state. The retro-reflector includes a corner cube array, and reflects incident light in the same direction as an incident direction. A unit structure of the corner cube array is a form of a triangular pyramid which is made up of rectangular equilateral triangles having three faces, and a light shielding process is performed on the periphery of a base angle of the rectangular equilateral triangle. Thus, it is possible to prevent an image from being reflected, so that it is possible to provide the luminous display element whose contrast ratio and the utilization efficiency of emission are high.
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Inventors:
Kiyoshi Minoura
Shun Ueki
Tomikawa Masahiko
Shun Ueki
Tomikawa Masahiko
Application Number:
JP2001228581A
Publication Date:
February 27, 2008
Filing Date:
July 27, 2001
Export Citation:
Assignee:
Sharp Corporation
International Classes:
H05B33/24; G09F9/30; H01J1/70; H01L27/32; H01L51/50; H01L51/52; H05B33/00; H05B33/10; H05B33/12; H05B33/14; H05B33/22
Domestic Patent References:
| JP11175007A | ||||
| JP10282489A | ||||
| JP2000019490A | ||||
| JP10189237A | ||||
| JP11354275A | ||||
| JP2001524687A | ||||
| JP2002502985A | ||||
| JP2001524220A | ||||
| JP2001522060A |
Foreign References:
| WO1999027396A1 | ||||
| WO1999040462A1 | ||||
| WO1998047026A1 | ||||
| WO1999023516A1 |
Attorney, Agent or Firm:
Kenzo Hara International Patent Office