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US4672368A Raster scan digital display system 失效
光栅扫描数字显示系统

Raster scan digital display system
摘要:
A raster scan digital display system of the type in which consecutive locations in a buffer store are accessed to provide a picture element data stream, has means to increase the number of bits in each picture element data group. Each applied buffer store address is compared with a preselected address. When equality is detected, the value of the extra picture element bits is set, and a new preselected address is generated. The value of the extra picture element bits remains constant until equality between the new preselected address and an applied buffer store address is detected, when the extra bit value is changed and a new preselected address is provided.
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