| 摘要 |
An additive display is driven from a digital source, such as a frame memory, to produce red and blue luminances that exceed the respective white point luminances of the display, thus producing saturated colors including red and blue and accordingly extending the gamut of the display system. The signals input to the frame memory are initially processed by a circuit, such as a color matrix, that is capable of corrections exceeding the white point of the image source. The processed signals are then encoded with more "headroom" for exceeding the respective white points of red and blue color values than for green color values. In one embodiment, the full red and blue bit resolution is bit-shifted and stored in the frame memory, with the red and blue white points stored as lesser code values than the green white point. The display drive signals produced from the encoded color values are then equalized for a common white point signal value before being applied to the additive display, such as a color CRT monitor.
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