| US 7,514,865 B2 | ||
| Display panel and display device | ||
| Tetsuro Yamazaki, Suwa (Japan); Takashi Takeda, Suwa (Japan); and Masatoshi Yonekubo, Hara-mura (Japan) | ||
| Assigned to Seiko Epson Corporation, Tokyo (Japan) | ||
| Filed on Apr. 26, 2005, as Appl. No. 11/114,113. | ||
| Claims priority of application No. 2004-135941 (JP), filed on Apr. 30, 2004. | ||
| Prior Publication US 2005/0242710 A1, Nov. 03, 2005 | ||
| Int. Cl. H05B 33/12 (2006.01); H05B 33/14 (2006.01) | ||
| U.S. Cl. 313—507 [313/498; 313/504] | 5 Claims |
| 1. A display panel, comprising:
a first optically transparent electrode layer;
a second optically transparent electrode layer;
a variable conductivity layer disposed on the first optically transparent electrode layer, and having an electrical conductivity
that is changed in accordance with a quantity of control light transmitted through the first transparent electrode layer;
a functional layer having, at least, a light emission layer, which is stacked on the variable conductivity layer, and which
is interposed between the variable conductivity layer and the second transparent electrode layer;
a predetermined voltage applied between the first transparent electrode layer and the second transparent electrode layer;
and
the light emission layer emitting light in accordance with the quantity of the control light.
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