Display system with luminance calculation
First Claim
Patent Images
1. A display system comprising:
- image displaying means for displaying a predetermined image on a screen by a raster scan;
image data generating means or generating predetermined image data to be displayed by said image displaying means;
storing means fore storing information representative of said predetermined image data generated by said image data generating means; and
image designating means for supplying said information stored in said storing means to said image displaying means in synchronism with said raster scan, said image designating means including luminance calculating means for calculating a value of luminance in accordance with contents of said information stored in said storing means and luminance controlling means for controlling luminance of said screen of said image displaying means in response to said calculated luminance value;
wherein said luminance calculating means adds luminance data to a sum of previous luminance data each time information for a pixel of said screen is read from said storing means, thereby calculating luminance of the screen for one image to be displayed by said image displaying means.
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Abstract
A display system calculates the value of luminance of a screen of a display unit for each display frame and dynamically controls the luminance of the display screen on the basis of the calculated luminance value while taking the surrounding brightness, thereby providing a display appearance easiest to see.
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Citations
11 Claims
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1. A display system comprising:
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image displaying means for displaying a predetermined image on a screen by a raster scan; image data generating means or generating predetermined image data to be displayed by said image displaying means; storing means fore storing information representative of said predetermined image data generated by said image data generating means; and image designating means for supplying said information stored in said storing means to said image displaying means in synchronism with said raster scan, said image designating means including luminance calculating means for calculating a value of luminance in accordance with contents of said information stored in said storing means and luminance controlling means for controlling luminance of said screen of said image displaying means in response to said calculated luminance value; wherein said luminance calculating means adds luminance data to a sum of previous luminance data each time information for a pixel of said screen is read from said storing means, thereby calculating luminance of the screen for one image to be displayed by said image displaying means. - View Dependent Claims (2, 3, 4, 5)
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4. A display system according to claim 1, wherein said luminance controlling means includes a reference table which indicates a control condition of luminance of an image to be displayed.
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5. A display system according to claim 4, wherein said luminance controlling means detects the brightness of an interior of a room in which said image displaying means is placed, and establishes a luminance control condition on the basis of the value of the detected brightness.
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6. A display system comprising:
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image displaying means for displaying a predetermined image on a screen by a raster scan; image data generating means for generating predetermined image data to be displayed by said image displaying means; storing means for storing information representative of said predetermined image data generated by said image data generating means; and image designating means for supplying said information stored in said storing means to said image displaying means in synchronism with said raster scan, said image designating means including luminance calculating means for calculating a value of luminance in accordance with contents of said information stored in said storing means and luminance controlling means for controlling luminance of said screen of said image displaying means in response to said calculated luminance value; wherein said luminance calculating means divides the screen of said image displaying means into a character region and a figure region, designated foreground and background colors of each of said character and figure regions, and determines the luminance of the display screen in accordance with an equation of (luminance of display screen)=(number of characters to be displayed)×
(luminance of foreground color of characters+luminance of background color of characters)+(luminance of background color of figure region). - View Dependent Claims (7)
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8. A display system comprising;
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a display unit for displaying display data; a display processor for generating display data to be displayed on a screen of said display unit; storing means for storing the display data to be displayed on the screen of said display unit; means for reading the display stored in said storing means in synchronism with a raster scan of said display unit to display the display data on the screen of said display unit; means for calculating a value of luminance of said display data stored in said storing means and displayed on the screen of said display unit; and means for dynamically controlling the luminance of the display screen on the basis of the value of luminance determined by said calculating means; wherein said means for calculating adds luminance doa to a sum of previous luminance doa each time display data displayed on said screen is read from said storing means by said means for reading, thereby calculating luminance of said screen for one image to be displayed by said display unit. - View Dependent Claims (9, 10, 11)
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Specification