发明名称 |
Memory updating for digital pixel sensors |
摘要 |
An improved technique for updating a memory in digital pixel sensors in which a memory update may be directed to only some of the locations or cells in the memory is disclosed. According to one embodiment, a multiplex scheme is employed, in which a threshold memory identifies the locations within a row of memory that are to be updated. Data are first read out of a row of memory to be updated. The data are copied to a first buffer or other short term storage area within the digital pixel sensor. New data from the sensor portion of the digital pixel sensor to be written to the memory are stored in a second buffer. The contents of the threshold memory are then applied to a select input of a multiplexer, where the contents of the first and second buffers comprise first and second data inputs to the multiplexer. Thus, the output of the multiplexer comprises an updated row of memory in which only those locations that are to be updated have been changed. The output of the multiplexer is preferably written directly back to the memory and a next row of memory may then be updated.
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申请公布号 |
US2001009440(A1) |
申请公布日期 |
2001.07.26 |
申请号 |
US20010801014 |
申请日期 |
2001.03.06 |
申请人 |
YANG DAVID XIAO DONG;DENG ZHONGHAN |
发明人 |
YANG DAVID XIAO DONG;DENG ZHONGHAN |
分类号 |
H04N1/00;H04N5/232;H04N5/235;H04N7/14;(IPC1-7):H04N3/14 |
主分类号 |
H04N1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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