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1. 发明授权

US5905540A Projection-type display apparatus 失效
公开(公告)号：US5905540A
公开(公告)日：1999-05-18
申请号：US708139
申请日：1996-08-27
申请人： Kiyoshi Miyashita , Satoshi Hirashima , Keijiro Naito , Mamoru Kobayashi
发明人： Kiyoshi Miyashita , Satoshi Hirashima , Keijiro Naito , Mamoru Kobayashi
IPC分类号： H04N3/14 , H04N5/74 , H04N9/31 , H04N9/69 , H04N5/202
CPC分类号： H04N9/312 , H04N9/3105 , H04N9/3141 , H04N9/3144 , H04N9/317 , H04N9/3182 , H04N9/69 , H04N2005/745
摘要： A projection-type video display in which the entire input video signal is first digitally corrected through digital gamma correction. Then, a subset of the corrected video signal is corrected again through analogue correction techniques. In particular this portion of the digitally corrected video signal corresponds to the subject where slopes of applied voltage-transmissivity characteristic curve (V-T curve) of liquid crystal changes relatively rapidly. The result is a more accurate gamma correction which is also less expensive than conventional, purely digital gamma correction systems. Another feature is the inclusion of three liquid crystal light valves, each having have a plurality of pixels arranged in the matrix and identical shift registers in such a way that pixels of one scanning line are driven selectively and sequentially from the same horizontal direction according to a given set of video signals, a memory where at least video signals for pixels of one scanning line are written and stored, a first drive controller for outputting video signals of one scanning line from memory in the order in which the video signals were written and supplying the video signals to pixels of a scanning line in at least one of light valves, and a second drive controller for outputting video signals of one scanning line from memory in a reverse order in which video signals were written thereto for supplying another light valve. Also disclosed is recognition unit for recognizing different types of input video signal format systems and a write controller for controlling the way of writing input video signals of each scanning line into pixels of horizontal scanning lines in the light valves based on different type of input video signal format system.

2. 发明授权

US6115084A Projection-type display apparatus 有权
标题翻译：投影型显示装置
公开(公告)号：US6115084A
公开(公告)日：2000-09-05
申请号：US287910
申请日：1999-04-07
申请人： Kiyoshi Miyashita , Satoshi Hirashima , Keijiro Naito , Mamoru Kobayashi
发明人： Kiyoshi Miyashita , Satoshi Hirashima , Keijiro Naito , Mamoru Kobayashi
IPC分类号： H04N3/14 , H04N5/74 , H04N9/31 , H04N9/69
CPC分类号： H04N9/312 , H04N9/3105 , H04N9/3141 , H04N9/3144 , H04N9/317 , H04N9/3182 , H04N9/69 , H04N2005/745
摘要： A projection-type video display in which the entire input video signal is first digitally corrected through digital gamma correction. Then, a subset of the corrected video signal is corrected again through analogue correction techniques. In particular this portion of the digitally corrected video signal corresponds to the subject where slopes of applied voltage-transmissivity characteristic curve (V-T curve) of liquid crystal changes relatively rapidly. The result is a more accurate gamma correction which is also less expensive than conventional, purely digital gamma correction systems. Another feature is the inclusion of three liquid crystal light valves, each having have a plurality of pixels arranged in the matrix and identical shift registers in such a way that pixels of one scanning line are driven selectively and sequentially from the same horizontal direction according to a given set of video signals, a memory where at least video signals for pixels of one scanning line are written and stored, a first drive controller for outputting video signals of one scanning line from memory in the order in which the video signals were written and supplying the video signals to pixels of a scanning line in at least one of light valves, and a second drive controller for outputting video signals of one scanning line from memory in a reverse order in which video signals were written thereto for supplying another light valve. Also disclosed is recognition unit for recognizing different types of input video signal format systems and a write controller for controlling the way of writing input video signals of each scanning line into pixels of horizontal scanning lines in the light valves based on different type of input video signal format system.
摘要翻译：投影型视频显示器，其中整个输入视频信号通过数字伽马校正被首先数字校正。然后，通过模拟校正技术再次校正经校正的视频信号的子集。特别地，数字校正视频信号的这一部分对应于液晶的施加的电压 - 透射率特性曲线（V-T曲线）的斜率相对快速地变化的对象。结果是更准确的伽马校正，其也比常规的纯数字伽马校正系统便宜。另一个特征是包括三个液晶光阀，每个液晶光阀具有排列在矩阵中的多个像素和相同的移位寄存器，使得一个扫描线的像素根据相同的水平方向选择性地和顺序地被驱动给定的一组视频信号，至少存储一个扫描线的像素的视频信号的存储器，用于以写入和供给视频信号的顺序从存储器输出一条扫描线的视频信号的第一驱动控制器视频信号到光阀中的至少一个中的扫描线的像素;以及第二驱动控制器，用于以与写入视频信号的方式相反的顺序从存储器输出一条扫描线的视频信号，以提供另一个光阀。还公开了用于识别不同类型的输入视频信号格式系统的识别单元和用于基于不同类型的输入视频信号来控制将每条扫描线的输入视频信号写入水平扫描线的像素的方式的写入控制器格式系统。

3. 发明授权

US5936678A Video signal processing device, information processing system, and video signal processing method 失效
标题翻译：视频信号处理装置，信息处理系统和视频信号处理方法
公开(公告)号：US5936678A
公开(公告)日：1999-08-10
申请号：US661856
申请日：1996-06-11
申请人： Satoshi Hirashima
发明人： Satoshi Hirashima
IPC分类号： H04N5/46 , G09G3/20 , G09G5/00 , G09G5/18 , H04L7/033 , H04N5/14 , H04N9/31 , H04N5/04 , H03L7/00
CPC分类号： G09G5/008 , G09G5/005 , H04N5/142 , G09G2320/0276 , G09G5/006 , H04L7/0337
摘要： An A/D converter samples an analog video signal, having a frequency corresponding to various types of image supply apparatus, and converts the signal into a digital signal. A sampling clock signal supply circuit supplies a sampling clock signal to the A/D converter, and comprises an edge detection circuit for adjusting the phase of the sampling clock signal. The edge detection circuit subjects the video signal and a delayed video signal to subtraction processing to generate edge pulses. A processor selects a sampling clock signal of a desired phase based on edge information determined by these edge pulses. The present device can also adjust a threshold voltage that is input to the comparator, and the phase of the sampling clock signal based on a digital signal, and supply a dedicated video signal for phase adjustment from a personal computer.
摘要翻译： A / D转换器对具有对应于各种类型的图像提供装置的频率的模拟视频信号进行采样，并将该信号转换为数字信号。采样时钟信号供给电路将采样时钟信号提供给A / D转换器，并且包括用于调整采样时钟信号的相位的边沿检测电路。边缘检测电路使视频信号和延迟视频信号进行减法处理以产生边缘脉冲。处理器基于由这些边缘脉冲确定的边缘信息来选择期望相位的采样时钟信号。本装置还可以调整输入到比较器的阈值电压和基于数字信号的采样时钟信号的相位，并从个人计算机提供用于相位调整的专用视频信号。

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