Color/mono switched display
First Claim
Patent Images
1. A color sequential display system operable in a monochrome mode comprising:
- a) a video signal source which generates a composite video signal containing a luminance signal Ys and primary color signals Rs, Bs, and Gs3;
b) a light source adapted to flash light of each of the primary colors R, B, or G or a white light W;
c) a display optically coupled to the light source, said display having an array for displaying (i) an image of the Rs, Bs, and Gs, signals in succession at a rate of 150–
240 Hz in a color sequential mode or (ii) displaying an image of the luminance signal Ys in succession at a rate of 50–
60 Hz in a monochrome mode; and
d) a control for the light sources which, in the color sequential mode, flashes light of each of the primary colors in synchronism with the respective image display of the Rs, Bs &
Gs signals and in the monochrome mode, flashes the white light or light of all of the primary colors simultaneously in synchronism with the display of the luminance signal Ys.
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Abstract
A color sequential display operative in one of two alternate modes. The first mode is a color sequential mode in which primary color images are displayed in successive frames while respective background light sources are simultaneously flashed on the display. The second mode is a monochrome mode in which the luminance Y signal is displayed in successive frames along with flashes of background white light.
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Citations
10 Claims
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1. A color sequential display system operable in a monochrome mode comprising:
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a) a video signal source which generates a composite video signal containing a luminance signal Ys and primary color signals Rs, Bs, and Gs3; b) a light source adapted to flash light of each of the primary colors R, B, or G or a white light W; c) a display optically coupled to the light source, said display having an array for displaying (i) an image of the Rs, Bs, and Gs, signals in succession at a rate of 150–
240 Hz in a color sequential mode or (ii) displaying an image of the luminance signal Ys in succession at a rate of 50–
60 Hz in a monochrome mode; andd) a control for the light sources which, in the color sequential mode, flashes light of each of the primary colors in synchronism with the respective image display of the Rs, Bs &
Gs signals and in the monochrome mode, flashes the white light or light of all of the primary colors simultaneously in synchronism with the display of the luminance signal Ys. - View Dependent Claims (2, 3, 4)
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5. A method of operatmg a color sequential display system in a monochrome mode comprising:
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a) receiving a composite video signal containing a luminance signal Ys and primary color signals Rs, Bs, and Gs; b) generating light of each of the primary colors R. B, or G and a white light W; c) displaying (i) an image of the Rs, Bs and Gs signals in succession at a rate of N cycles per second in a color sequential mode or (ii) displaying an image of the luminance signal Ys in succession at a rate of M cycles per second in a monochrome mode; and d) in the color sequential mode flashing light of each of the primary colors in synchronism with the respective image display of the Rs, Bs &
Gs signals and in the monochrome mode, flashing the white light or light of all of the primary colors simultaneously in synchronism with the display of the luminance signal Ys. - View Dependent Claims (6, 7)
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8. A color sequential display system operable in a monochrome mode comprising:
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a) an interface for receiving a composite video signal containing a luminance signal Ys and primary color signals Rs, Bs, and Gs; b) a light source coupled to the display and optically adapted to generate light of each of the primary colors R, B, or G and a white light W; c) said display having an array for displaying (i) an image of the Rs, Bs, and Gs signals in succession at a rate of N cycles per second in a color sequential mode or (ii) displaying an image of the luminance signal Ys in succession at a rate of M cycles per second in a monochrome mode; and d) a control for the light sources which, in the color sequential mode, flashes light of each of the primary colors in synchronism with the respective image display of the Rs, Bs &
Gs signals and in the monochrome mode, flashes of the white light or light of all of the primary colors simultaneously in synchronism with die display of the lumunance signal Ys. - View Dependent Claims (9, 10)
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Specification