(1) Field of the Invention
The present invention relates to a television device for providing images with appropriate quality in accordance with a viewing environment.
(2) Description of the Related Art
Various functions of the video display device such as a television device have been proposed for adjusting the video image quality in accordance with the viewing environment such as ambient brightness. For example, Japanese Published Unexamined Patent Application No. 4-342373 discloses the television receiver structured to automatically adjust the image quality to the level adapted to the viewing environment based on the illuminance data of the ambient brightness and the distance data with respect to the viewing distance between the receiver and the viewer. Japanese Published Unexamined Patent Application No. 2000-112021 discloses a display device of projection type structured to allow the light detection unit to detect the light flux from the display area, and automatically adjust the light flux projected to the display area based on the output signal from the light detection unit.