Patent ID: 7438420

Claim:
A display apparatus comprising: an image-data input means for receiving, as input, image data derived from an image signal provided to the display apparatus for display thereby; a brightness extraction means for receiving image data from said image-data input means, digitizing brightness data derived from the image data, and outputting the digitized brightness data; a light source; a light source-temperature adjusting means for regulating in accordance with the digitized brightness data the temperature of said light source so as to remain within a predetermined temperature range; a light modulation device disposed to receive light emitted from said light source, and configured to modulate the received light in accordance with the image data to display the image signal; and a light source controlling means for receiving the digitized brightness data from said brightness extraction means, and controlling in accordance with the digitized brightness data electric power inputted to said light source, to adjust the amount of light that enters said light modulation device.