Illuminated surround and method for operating same for video and other displays
First Claim
1. A display apparatus comprising:
- a screen adapted to display an image;
an illuminated surround adjacent at least one edge of the screen;
an ambient light sensor located near the screen; and
a control coupled to the sensor and to the surround, to control a brightness and/or chromaticity of the surround responsive to the sensed ambient light level.
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Accused Products
Abstract
In a video or other screen display apparatus, a surround to the actual screen is provided whose light output is variable in order to compensate for the effect of ambient (room) illumination on apparent contrast and chroma of the displayed image. The relationship between ambient light level and the surround illumination is an inverse power function. This provides the effect of making the viewer perceive that the entire room is brighter than it actually is, resulting in a desirable change in his perception of brightness. Thereby, the chromaticity of the surround is variable to allow a match to the calibrated white point of the video display. The apparatus includes an ambient light sensor whose output signal is provided to a control system driving the illuminated surround.
41 Citations
27 Claims
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1. A display apparatus comprising:
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a screen adapted to display an image; an illuminated surround adjacent at least one edge of the screen; an ambient light sensor located near the screen; and a control coupled to the sensor and to the surround, to control a brightness and/or chromaticity of the surround responsive to the sensed ambient light level. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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4. The apparatus of Claim I, wherein a portion of the surround which is illuminated is spaced apart from the screen.
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14. A method comprising the acts of:
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displaying an image on a screen; providing an illuminated area adjacent at least one edge of the screen; sensing a level of ambient light near the screen; and controlling a brightness or chromaticity of the illuminated area responsive to the sensed ambient light level. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. Apparatus for use with a screen adapted to display an image, the apparatus comprising:
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an illuminated surround adapted to be mounted adjacent to at least three edges of the screen; an ambient light sensor located near the screen; and a control coupled to the sensor and to the surround, to control a brightness or chromaticity of the surround responsive to the sensed ambient light level.
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Specification