| US 7,480,090 B2 | ||
| Optical deflecting device, optical deflecting device array, method for driving the optical deflecting device and image projection display apparatus using the device | ||
| Seiichi Katoh, Sendai (Japan); Takeshi Nanjyo, Takarazuka (Japan); and Koichi Ohtaka, Shibata-gun (Japan) | ||
| Assigned to Ricoh Company, Ltd., Tokyo (Japan) | ||
| Filed on Oct. 19, 2006, as Appl. No. 11/582,995. | ||
| Claims priority of application No. 2005-305746 (JP), filed on Oct. 20, 2005; and application No. 2006-273232 (JP), filed on Oct. 04, 2006. | ||
| Prior Publication US 2007/0091416 A1, Apr. 26, 2007 | ||
| Int. Cl. G02B 26/00 (2006.01); G02B 26/08 (2006.01) | ||
| U.S. Cl. 359—290 [359/198] | 6 Claims |
| 2. An optical deflecting device comprising:
a plate member including a light reflective area and a conductor layer, the plate member rotating with substantially the middle
portion thereof made a fulcrum to change an inclination direction thereof and thereby a reflection direction of a light flux
incident to the light reflective area being changed; and
a first electrode group and a second electrode group arranged so as to oppose the conductor layer of the plate member, respectively,
and to sandwich a position corresponding to a position of the fulcrum of the plate member, each electrode group including
a control electrode controlling starting of the plate member and a drive electrode driving the plate member,
wherein the control electrodes of the first electrode group and the second electrode group are respectively arranged in positions
opposing corners of the plate member.
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