| US 7,524,070 B2 | ||
| Projection control system, projector and projection control method | ||
| Hideki Matsuda, Fujimi-machi (Japan); Masanobu Kobayashi, Shiojiri (Japan); and Osamu Wada, Ina (Japan) | ||
| Assigned to Seiko Epson Corporation, Tokyo (Japan) | ||
| Filed on Dec. 29, 2005, as Appl. No. 11/319,269. | ||
| Claims priority of application No. 2005-002311 (JP), filed on Jan. 07, 2005. | ||
| Prior Publication US 2006/0152682 A1, Jul. 13, 2006 | ||
| Int. Cl. G03B 21/14 (2006.01) | ||
| U.S. Cl. 353—70 [353/101; 353/121] | 8 Claims |
| 1. A projection control system, comprising:
a projection angle deriving section which generates projection angle information indicating an angle formed by a projection
target area and projection light projected onto the projection target area;
a projection distance deriving section which generates projection distance information indicating a distance from an aim area
in the projection target area to a projection section which projects the projection light;
a control information generation section which generates direction control information for aligning a projection direction
of the projection light with a normal direction of the projection target area based on the projection angle information, and
generates projection section control information for controlling the projection section so that the projection light is projected
onto the aim area based on the projection distance information;
a driver section which drives a direction adjustment mechanism which adjusts the projection direction of the projection light
based on the direction control information;
a control section which controls the projection section based on the projection section control information;
a sensing section which generates sensing information by sensing an area including the projection target area;
a projection area detection section which detects a projection area in the projection target area based on the sensing information
and generates projection area information indicating information about a position of the projection area; and
a projection target area detection section which detects the projection target area based on the sensing information and generates
projection target area information indicating information about a position of the projection target area,
wherein the projection angle deriving section generates the projection angle information based on the projection area information
and the projection target area information.
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