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1. 发明公开

EP0704835A3 Error diffusion filter for DMD display 失效
标题翻译：用于DMD显示误差扩散过滤器
公开(公告)号：EP0704835A3
公开(公告)日：1996-05-22
申请号：EP95114890.7
申请日：1995-09-21
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Doherty, Donald B. , Pettitt, Gregory , Markandey, Vishal
IPC分类号： G09G3/34
CPC分类号： G09G3/346 , G09G3/2007 , G09G3/2022 , G09G3/2059 , G09G2330/10 , H04N5/7441
摘要： A DMD display system includes an inverse gamma look-up-table (50) for converting raster scanned, gamma corrected video data of 8 bits to 12 bits inverse gamma data with 8 most significant bits (msb) and 4 least significant bits (lsb). The 8 msb are coupled to the micromirror of the DMD display (10) and the four lsb are delayed and halved such that one half of the lsb is added to the next pixel in the horizontal scan and one-half of the lsb is added to the next vertical pixel one line length delayed due to degamma. For each input intensity in, the output intensity in will be displayed on the DMD device. If the degamma was perfect and there was no lack of bits, the value displayed in the DMD would be some other value N1. We compute the difference between N and N1 and distribute this difference (error) among the neighboring pixels. The error can be distributed among the neighbors in various ways. One implementation is shown in Fig. 4. A further advantage of the present invention is that the defect compensation can be performed as part of this algorithm. For this, the DMD coordinates of defective pixels need to be known and the error diffusion needs to be modified to account for the fact that at those locations the pixel displays either bright (stuck ON), dark (stuck OFF) or neutral (flat pixel).

2. 发明授权

EP0704835B1 Error diffusion filter for DMD display 失效
标题翻译：用于DMD显示误差扩散过滤器
公开(公告)号：EP0704835B1
公开(公告)日：2005-02-09
申请号：EP95114890.7
申请日：1995-09-21
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Doherty, Donald B. , Pettitt, Gregory , Markandey, Vishal
IPC分类号： G09G3/34
CPC分类号： G09G3/346 , G09G3/2007 , G09G3/2022 , G09G3/2059 , G09G2330/10 , H04N5/7441

3. 发明公开

EP0704835A2 Error diffusion filter for DMD display 失效
标题翻译：用于DMD显示的误差扩散滤波器
公开(公告)号：EP0704835A2
公开(公告)日：1996-04-03
申请号：EP95114890.7
申请日：1995-09-21
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Doherty, Donald B. , Pettitt, Gregory , Markandey, Vishal
IPC分类号： G09G3/34
CPC分类号： G09G3/346 , G09G3/2007 , G09G3/2022 , G09G3/2059 , G09G2330/10 , H04N5/7441
摘要： A DMD display system includes an inverse gamma look-up-table (50) for converting raster scanned, gamma corrected video data of 8 bits to 12 bits inverse gamma data with 8 most significant bits (msb) and 4 least significant bits (lsb). The 8 msb are coupled to the micromirror of the DMD display (10) and the four lsb are delayed and halved such that one half of the lsb is added to the next pixel in the horizontal scan and one-half of the lsb is added to the next vertical pixel one line length delayed due to degamma. For each input intensity in, the output intensity in will be displayed on the DMD device. If the degamma was perfect and there was no lack of bits, the value displayed in the DMD would be some other value N1. We compute the difference between N and N1 and distribute this difference (error) among the neighboring pixels. The error can be distributed among the neighbors in various ways. One implementation is shown in Fig. 4. A further advantage of the present invention is that the defect compensation can be performed as part of this algorithm. For this, the DMD coordinates of defective pixels need to be known and the error diffusion needs to be modified to account for the fact that at those locations the pixel displays either bright (stuck ON), dark (stuck OFF) or neutral (flat pixel).
摘要翻译： DMD显示系统包括反向伽马查找表（50），用于将具有8个最高有效位（msb）和4个最低有效位（lsb）的8位伽马校正视频数据转换为12位反伽马数据，。 8msb耦合到DMD显示器（10）的微镜，并且四个lsb被延迟和减半，使得lsb的一半被添加到水平扫描中的下一个像素，并且lsb的一半被添加到下一个垂直像素由于degamma而延迟一行的长度。对于每个输入强度，输出强度将显示在DMD设备上。如果去伽玛是完美的并且没有缺位，则DMD中显示的值将是其他值N1。我们计算N和N1之间的差值，并在相邻像素之间分配这个差值（误差）。错误可以以各种方式在邻居之间分配。图4中示出了一种实现方式。本发明的另一个优点是缺陷补偿可以作为该算法的一部分来执行。为此，需要知道有缺陷像素的DMD坐标，并且需要修改误差扩散以说明在这些位置像素显示明亮（卡住ON），暗（卡住OFF）或中性（平坦像素）。

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