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公开(公告)号：US5621425A
公开(公告)日：1997-04-15
申请号：US172633
申请日：1993-12-21
CPC分类号： G09G3/2011 , G09G3/3625
摘要： The liquid crystal display device is comprised of a matrix panel 1, a common driver 2 and a segment driver 3. A liquid crystal layer is interposed between rows of the scanning electrodes 4 and columns of signal electrodes 5. A frame memory 6 stores an inputted dot data each frame. An orthonormal signal generator 7 generates a set of orthonormal signals to sequentially feed the same in a desired combination pattern to the common driver 2 to concurrently drive a multiple of the scanning electrodes 4 to effect group sequential scanning according to the combination pattern. A dot product computation unit 8 executes dot product computation between a set of the dot data and the set of the orthonormal signals, the result of which is fed to the segment driver 3 to drive the columns of the signal electrodes 5. The group sequential scanning is repeated several times within one cycle to display a picture. The orthonormal signals are horizontally or vertically shifted to improve the quality of the displayed picture. Further, the multiple concurrent line number is optimized to balance the withstand voltage between the common driver 2 and the segment driver 3. Moreover, in the gray shading display by pulse-height modulation, a voltage pulse assigned to a virtual line of the scanning electrode is spread out to improve the gray shaded quality of the displayed picture.
摘要翻译： 液晶显示装置由矩阵面板1，公共驱动器2和片段驱动器3构成。液晶层插入在扫描电极4的行和信号电极5的列之间。帧存储器6存储输入的 点数据每帧。 正交信号发生器7产生一组正交信号，以将期望的组合模式顺序地馈送到公共驱动器2，以同时驱动多个扫描电极4，以根据组合模式进行组顺序扫描。 点积计算单元8在一组点数据和正交信号组之间执行点积计算，其结果被馈送到段驱动器3以驱动信号电极5的列。组顺序扫描 在一个周期内重复多次以显示图片。 正交信号水平或垂直移位，以提高显示图像的质量。 此外，多路并行线路数被优化以平衡公共驱动器2和段驱动器3之间的耐受电压。此外，在通过脉冲高度调制的灰度阴影显示中，分配给扫描电极的虚拟线的电压脉冲 被展开以改善显示图像的灰色阴影质量。
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公开(公告)号：US5912655A
公开(公告)日：1999-06-15
申请号：US395429
申请日：1995-02-28
申请人： Masafumi Hoshino , Shuhei Yamamoto , Hiroyuki Fujita , Hirotomo Oniwa , Kentaro Yagi , Fujio Matsu
发明人： Masafumi Hoshino , Shuhei Yamamoto , Hiroyuki Fujita , Hirotomo Oniwa , Kentaro Yagi , Fujio Matsu
CPC分类号： G09G3/3625 , G09G2330/02
摘要： A display device includes a liquid crystal panel, a controller, a common driver and a segment driver. The common driver is powered by a high power supply voltage and outputs row driving waveforms having predetermined voltage levels, which are relatively high. The segment driver is powered by a low power supply voltage and outputs column driving waveforms having predetermined voltage levels, which are relatively low. By this construction, it is not necessary for both the segment and common drivers to be high withstand voltage integrated circuit devices.
摘要翻译： 显示装置包括液晶面板，控制器，公共驱动器和段驱动器。 公共驱动器由高电源电压供电，并输出具有相对高的预定电压电平的行驱动波形。 段驱动器由低电源电压供电，并且输出具有相对较低的预定电压电平的列驱动波形。 通过这种结构，片段和共同驱动器不需要是高耐压集成电路器件。
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公开(公告)号：US5696524A
公开(公告)日：1997-12-09
申请号：US437500
申请日：1995-05-09
CPC分类号： G09G3/3625 , G09G2310/0208 , G09G3/2014 , G09G3/2018
摘要： A display device includes a vertical driver for applying to row electrodes a set of row signals represented by a set of orthogonal functions supplied by an orthogonal function generator at each selection period by group-sequential scanning within one frame. A dot product processor successively carries out a dot product computation between the set of orthogonal functions and a set of pixel data. A horizontal driver applies to column electrodes column signals having voltage levels determined by the results of the dot product computation at each selection period in synchronization with the group-sequential scanning. A frame memory stores the pixel data for each frame in divided bit form. The dot product processor reads out the set of stored pixel data in divided bit form and executes the dot product computation to produce a column signal component for each respective bit. The horizontal driver arranges a plurality of column signal components corresponding to the respective bits subjected to either pulse modulation or frame-rate modulation within one frame period to produce the column signal that is applied to the column electrodes. A memory controller controls the writing of the pixel data into the frame memory. Bit data subjected to the pulse modulation are written to the frame memory for every frame, while bit data subjected to frame-rate modulation are selectively written to the frame memory only at frames specified by the frame-rate modulation.
摘要翻译： 显示装置包括垂直驱动器，用于在一个帧内通过组顺序扫描在每个选择周期向行电极施加一组由正交函数发生器提供的正交函数表示的行信号。 点积处理器依次在正交函数集合和一组像素数据之间执行点积计算。 横向驱动器适用于具有由组顺序扫描同步的每个选择周期的点积计算结果确定的电压电平的列电极列信号。 帧存储器以分割位形式存储每帧的像素数据。 点积处理器以分割位形式读出存储的像素数据集，并执行点积计算，以产生每个相应位的列信号分量。 水平驱动器在一个帧周期内配置对应于经过脉冲调制或帧速率调制的各个比特的多个列信号分量，以产生施加到列电极的列信号。 存储器控制器控制将像素数据写入帧存储器。 经过脉冲调制的位数据被写入每帧的帧存储器，而经帧速率调制的位数据仅在由帧速率调制指定的帧中选择性地写入帧存储器。
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公开(公告)号：US5619224A
公开(公告)日：1997-04-08
申请号：US366419
申请日：1994-12-27
申请人： Masafumi Hoshino , Shuhei Yamamoto , Hiroyuki Fujita , Hirotomo Oniwa , Teruo Ebihara , Fujio Matsu
发明人： Masafumi Hoshino , Shuhei Yamamoto , Hiroyuki Fujita , Hirotomo Oniwa , Teruo Ebihara , Fujio Matsu
CPC分类号： G09G3/3625 , G09G2310/0208 , G09G3/2014
摘要： In order to prevent signal distortion using a multiple line selection driving technique when using pulse width modulation to achieve a half-tone display in a liquid crystal display panel, respective bits of column signals are arranged in a descending pulse width order and a voltage generating circuit is used to lower level differences in adjacent bits. An orthonormal function generating circuit generates a plurality of row signals to drive a group of row electrodes through a vertical driver. A dot product computation circuit computes a dot product of the orthonormal functions and pixel display data to generate a column signal in the above manner. A horizontal driver applies the column signal to a group of column electrodes. Pixel data is stored in a frame memory, each datum being represented by a series of bits corresponding to a gray scale. The dot product computation circuit divides the pixel data into the respective bits, and individually carries out the dot product computation for each bit. The horizontal driver arranges the column signal components in order of descending pulse width. A voltage level circuit lowers the voltage level between the column components to reduce distortion caused by the high switching speed between the components and the low response time of the liquid crystal material.
摘要翻译： 为了在使用脉冲宽度调制来实现液晶显示面板中的半色调显示时，为了防止使用多行选择驱动技术的信号失真，列信号的各个位按照下降的脉冲宽度顺序排列，电压产生电路 用于降低相邻位的电平差。 正交函数发生电路产生多个行信号以通过垂直驱动器驱动一组行电极。 点积计算电路以上述方式计算正交函数和像素显示数据的积积以产生列信号。 水平驱动器将列信号施加到一组列电极。 像素数据存储在帧存储器中，每个数据由对应于灰度级的一系列位表示。 点积计算电路将像素数据分割成各个位，并且分别对每个位执行点积计算。 水平驱动器按照下降脉冲宽度的顺序排列列信号分量。 电压电平电路降低列组件之间的电压电平，以减少由组件之间的高切换速度引起的失真和液晶材料的低响应时间。
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