发明授权
- 专利标题: Raster scan digital display system
- 专利标题(中): 光栅扫描数字显示系统
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申请号: US723130申请日: 1985-04-15
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公开(公告)号: US4672368A公开(公告)日: 1987-06-09
- 发明人: Donald W. Williams
- 申请人: Donald W. Williams
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: G09G5/36
- IPC分类号: G09G5/36 ; G09G5/00 ; G09G5/06 ; G09G5/395 ; G09G1/16
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.
公开/授权文献
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