Display system with direct color mode

Details Display system with direct color mode Display system with direct color mode

1992-07-13

1993-07-13

Nguyen, Phu K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

395162, 395164, 340703, 340799, G06F 1540, G04G 100

Patent

active

052281205

ABSTRACT:
A display system having a display memory, a palette and a digital-to-analogue converter stage is able to support both an indirect color mode and a direct color mode. In the indirect color mode. pixel data from the display memory is used to access chrominance and/or luminance data from the palette for conversion in the converter stage into analogue values for controlling a display device. In the direct color mode. pixel data in the display memory directly specifies the chrominance and/or luminance data for conversion in the converter stage into analogue values for controlling the display device. In the direct color mode, however, the converter stage is also responsive to data from the palette for producing the analogue values for controlling the display device. The invention permits the provision of direct as well as indirect color modes in a flexible and efficient manner, with the provision of a plurality of formats for the direct color modes being achieved by loading appropriate information into the palette.

REFERENCES:
patent: 4712099 (1987-12-01), Maeda
patent: 4808989 (1989-02-01), Tabata et al.
patent: 4857901 (1989-08-01), Lathrop
patent: 4878178 (1989-10-01), Takakura et al.
patent: 4894789 (1990-01-01), Yee
patent: 4905164 (1990-02-01), Chandler et al.
patent: 4975861 (1990-12-01), Fugimoto

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