Graphic display device
First Claim
1. Graphic display device comprising a combination directed beam and frame-scanning color screen, the display being obtained by the filling in of colored zones delimited by boundaries, the device comprising a microprocessor which successively computes for each frame line, the intersection points of the frame line with the boundaries of the colored zones, said microprocessor including first means for coloring a given frame line, and second means for simultaneously computing the intersection points of said boundaries with a frame line following said given frame line and wherein said boundaries of the colored zones are drawn on the screen by directed-beam scanning.
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Abstract
The invention relates to a graphic display device. The main object of the invention is a screen display device using a combination of directed-beam scanning for drawings of patterns and frame-scanning display for surface coloring. The device of the invention comprises a microprocessor which makes real-time calculations, for each line displayed, of the starting and finishing abscissae of the various colors to be used. Real-time computing by the microprocessor makes it possible to use video memories instead of the habitually used page memories and to replace a very bulky and expensive graphic processor with a fast microporocessor. The invention can be applied chiefly to the display of three-dimensional perspective views on color screens.
22 Citations
12 Claims
- 1. Graphic display device comprising a combination directed beam and frame-scanning color screen, the display being obtained by the filling in of colored zones delimited by boundaries, the device comprising a microprocessor which successively computes for each frame line, the intersection points of the frame line with the boundaries of the colored zones, said microprocessor including first means for coloring a given frame line, and second means for simultaneously computing the intersection points of said boundaries with a frame line following said given frame line and wherein said boundaries of the colored zones are drawn on the screen by directed-beam scanning.
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6. Device according to claim one wherein the said device is a device for the display of three-dimensional perspective views.
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7. Device according to claim one comprising a video processor which as a color-range memory in which are stored the intensities of primary colors needed to obtain desired colors associated with an interface comprising a digital-to-analog converter associated with each primary color generator.
- 10. Method for screen display, by frame scanning, of colored zones delimited by boundaries displayed by directed-beam scanning, wherein a microprocessor stores, in a RAM, data relating to the frame scanning, the said microprocessor computing, in real time, the abscissa of all of the intersection points of each frame line with the boundaries of the colored zones during frame scanning of the immediately preceding frame line.
Specification