Patent ID: 6717626
Filing Date: 2004-04-06
Classification: H04N

Abstract:
A rear projection television set, comprising:a cabinet having an opening in a front panel thereof communicating with a cavity therein; a set of projection tubes in the cavity for projecting images towards the opening, each projection tube configured for emitting substantially single color images of one of red, green, and blue light; a screen assembly mounted across the opening for viewing the images from outside the cabinet, the screen assembly comprising a protection panel having a spectral transmittance that peaks at wavelengths of substantially red, green, and blue light, and that is reduced substantially at wavelengths between red and green light and between green and blue light, wherein the protection panel is removable from the cabinet; a user interface for selecting one of an unshielded and a shielded mode indicating whether the protection panel is removed or mounted to the cabinet, respectively; and control circuitry coupled to the interface for adjusting current levels of the set of projection tubes in response to the selected mode to provide a predetermined color temperature of an image visible from outside the cabinet through the screen assembly.