公开(公告)号：US07102695B2

公开(公告)日：2006-09-05

申请号：US10440679

申请日：2003-05-19

申请人： Yong-In Han ,  Chang-Yeong Kim ,  Seong-Deok Lee ,  Chang-Won Huh ,  Seok-Joon Park

发明人： Yong-In Han ,  Chang-Yeong Kim ,  Seong-Deok Lee ,  Chang-Won Huh ,  Seok-Joon Park

IPC分类号： H04N5/52 ,  H04N5/57 ,  H04N9/64 ,  G09G5/00 ,  G09G5/02 ,  G09G5/10

CPC分类号： H04N5/57 ,  H04N9/68 ,  H04N21/4318 ,  H04N21/44008

摘要： A method and apparatus for selectively enhancing contrast depending on the level of incoming video signals while preserving colors are provided. An apparatus for enhancing the contrast and brightness of a video signal displayed on a display device includes: a first luminance level transformation circuit that receives luminance and chrominance signals, reduces the level of the luminance signal in response to a first control signal, and outputs the chrominance signals and the luminance signal whose level has been reduced; an image converting circuit that receives the output signals from the first luminance level transformation circuit and converts the received signals into RGB video signals; and a second luminance level transformation circuit that receives the RGB video signals from the image converting circuit, concurrently increases the respective levels of the RGB video signals in response to a second control signal, and outputs the RGB video signals whose levels have been increased. It is desirable that the display device is a color display tube (“CDT”), a thin film transistor liquid crystal display (“TFT-LCD”), or a plasma display panel (“PDP”).

摘要翻译： 提供了一种用于在保留颜色的同时根据输入视频信号的电平有选择地增强对比度的方法和装置。 一种用于增强显示装置上显示的视频信号的对比度和亮度的装置，包括：接收亮度和色度信号的第一亮度级变换电路，响应于第一控制信号降低亮度信号的电平，并输出 色度信号和电平降低的亮度信号; 图像转换电路，接收来自第一亮度级变换电路的输出信号，并将接收的信号转换为RGB视频信号; 以及从图像转换电路接收RGB视频信号的第二亮度电平变换电路，响应于第二控制信号同时增加RGB视频信号的各个电平，并输出其电平已经增加的RGB视频信号。 期望显示装置是彩色显像管（“CDT”），薄膜晶体管液晶显示器（“TFT-LCD”）或等离子体显示面板（“PDP”）。

公开(公告)号：US07400311B2

公开(公告)日：2008-07-15

申请号：US10697207

申请日：2003-10-30

申请人： Seok-joon Park ,  Hwan-sang Roh ,  Yong-joon Jung ,  Kwang-whui Cho ,  Yong-in Han ,  Gwang-sun Lee

发明人： Seok-joon Park ,  Hwan-sang Roh ,  Yong-joon Jung ,  Kwang-whui Cho ,  Yong-in Han ,  Gwang-sun Lee

IPC分类号： G09G3/36

CPC分类号： G09G3/3611 ,  G09G2320/0252 ,  G09G2340/16

摘要： A response time accelerator and method for driving a liquid crystal display (LCD) are provided. According to the response time accelerator for driving an LCD, an acceleration unit reads previous data Pn−1 corresponding to input current data Pn from a frame memory unit that updates and stores one or more frames of previous data Pn−1. The acceleration unit then reads predetermined mapped panel output value TPO, predetermined mapped panel characteristic value TpPn, and flag information corresponding to the previous data Pn−1 and current data Pn from a table memory unit that stores predetermined mapped panel output values TPOs, predetermined mapped panel characteristic values TpPns, and flag information corresponding to the predetermined mapped panel characteristic values TpPns, and decodes the read information. The acceleration unit performs interpolations on the decoded mapped panel output value TPO and mapped panel characteristic value TpPn according to the flag information, and generates liquid crystal panel data PO to be output to a liquid crystal panel and previous data of a next frame pPn to be output to the frame memory unit. Thus, the response time accelerator and method make it possible to improve the response time of the liquid crystal even with respect to image data with extremely large or small gray level value.

摘要翻译： 提供了用于驱动液晶显示器（LCD）的响应时间加速器和方法。 根据用于驱动LCD的响应时间加速器，加速单元从更新并存储先前数据Pn-1的一个或多个帧的帧存储器单元读取与输入当前数据Pn对应的先前数据Pn-1。 然后，加速单元从存储预定的映射面板输出值TPO的表存储器单元读取预定映射面板输出值TPO，预定映射面板特性值TpPn以及与先前数据Pn-1对应的标志信息和当前数据Pn，预定映射 面板特征值TpPns和对应于预定映射面板特征值TpPns的标志信息，并对读取的信息进行解码。 加速单元根据标志信息对解码的映射面板输出值TPO和映射面板特性值TpPn进行内插，并生成要输出到液晶面板的液晶面板数据PO和下一帧pPn的先前数据为 输出到帧存储器单元。 因此，响应时间加速器和方法即使对于具有极大或小的灰度值的图像数据，也可以改善液晶的响应时间。