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1. 发明专利

JP2010231221A Video display device, and display part driving circuit and video display method used therefor 有权
标题翻译：视频显示设备和显示部件驱动电路及其使用的视频显示方法
公开(公告)号：JP2010231221A
公开(公告)日：2010-10-14
申请号：JP2010106873
申请日：2010-05-07
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AOKI KOJI , HASEGAWA AKIRA , SAKAMOTO HIROFUMI , TAKADA HARUKI , TSURU YASUTAKA
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20 , G09G3/34 , H04N5/66
摘要： PROBLEM TO BE SOLVED: To provide a video display technology with which high contrast is obtained, in a stable manner. SOLUTION: The gain of a luminance signal is varied, by feeding maximum luminance level information and mean luminance level information of a digital luminance signal back to adjust the contrast of a picture; and control is performed to contrast of a video image, on the basis of a mean luminance level detected from a feedback system so as to increase the illuminance of a backlight with which a display part is irradiated, when the mean luminance level is higher than the upper-limit value of a preset reference range and decrease the illuminance of the backlight, when lower than the lower-limit value of the reference range. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：以稳定的方式提供获得高对比度的视频显示技术。解决方案：通过馈送最大亮度电平信息和数字亮度信号的平均亮度电平信息来反映亮度信号的增益，以调整图像的对比度; 基于从反馈系统检测到的平均亮度水平，对视频图像进行对比度的控制，以便当平均亮度水平高于所述平均亮度水平时，增加显示部件照射的背光的照度当低于参考范围的下限值时，预设参考范围的上限值并降低背光的照度。版权所有（C）2011，JPO＆INPIT

2. 发明专利

JP2006311179A Video display device, video signal processing circuit for use in the same, and method for controlling degree of color saturation of video signal 有权
标题翻译：视频显示装置，用于其中的视频信号处理电路以及用于控制视频信号颜色饱和度的方法
公开(公告)号：JP2006311179A
公开(公告)日：2006-11-09
申请号：JP2005130980
申请日：2005-04-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AOKI KOJI , HASEGAWA AKIRA , OKA NAOYA , ASAOKA RIKIYA , HONDA DAISUKE
IPC分类号： H04N9/68 , G09G5/00 , G09G5/02
CPC分类号： H04N1/6027 , G06T5/009 , G06T5/40
摘要： PROBLEM TO BE SOLVED: To provide image display technology for displaying an image of high picture quality by a video signal of a suitable degree of color saturation.
SOLUTION: Color histogram information is detected from a color difference signal, average luminance level information or luminance histogram information is detected from a luminance signal, the demodulation axis adjustment of the color difference signal is controlled on the basis of the detected color histogram information and the detected average luminance level information or the luminance histogram information, the demodulation axis adjusted signal and the luminance signal are together matrix-transformed, and output as a video signal of a prescribed degree of color saturation and video display is performed by the video signal.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供用于通过适当程度的色彩饱和度的视频信号显示高画质的图像的图像显示技术。解决方案：从色差信号检测颜色直方图信息，从亮度信号检测平均亮度级信息或亮度直方图信息，基于检测到的颜色直方图来控制色差信号的解调轴调整信息和检测到的平均亮度级信息或亮度直方图信息，解调轴调整信号和亮度信号被一起进行矩阵变换，并且作为视频信号输出为规定的色彩饱和度，视频显示由视频执行信号。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2006013735A Image display device 有权
标题翻译：图像显示设备
公开(公告)号：JP2006013735A
公开(公告)日：2006-01-12
申请号：JP2004185794
申请日：2004-06-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKO MASAHIRO , TSURU YASUTAKA , HASEGAWA AKIRA , KIMURA KATSUNOBU , AOKI KOJI
IPC分类号： H04N5/208 , G09G3/20 , G09G3/36 , G09G5/00 , G09G5/36 , H04N5/14 , H04N5/21
CPC分类号： H04N5/208
摘要： PROBLEM TO BE SOLVED: To provide an image quality correction circuit for accurately grasping the characteristics of an input video signal to perform contour correction.
SOLUTION: There are provided a filter circuit 10 for extracting the contour component of an input video signal, a contour component nonlinear processor 13 for varying the amplitude of the contour component extracted by the filter circuit, an adder 14 for adding the output of the contour component nonlinear processor to the input video signal, a histogram detection circuit 11 for detecting the histogram of the contour component extracted by the filter circuit, and a control circuit 12 for controlling the amount of contour enhancement at the contour component nonlinear processor according to results detected by the histogram detection circuit.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供用于精确地掌握输入视频信号的特性以进行轮廓校正的图像质量校正电路。提供一种用于提取输入视频信号的轮廓分量的滤波器电路10，用于改变由滤波器电路提取的轮廓分量的振幅的轮廓分量非线性处理器13，加法器14，用于将输出轮廓分量非线性处理器到输入视频信号的直方图检测电路11，用于检测由滤波器电路提取的轮廓分量的直方图的直方图检测电路11，以及用于控制轮廓分量非线性处理器处的轮廓增强量的控制电路12，由直方图检测电路检测到的结果。版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2005236707A Display device 审中-公开
标题翻译：显示设备
公开(公告)号：JP2005236707A
公开(公告)日：2005-09-02
申请号：JP2004043830
申请日：2004-02-20
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HASEGAWA AKIRA , MATONO TAKAAKI , KUBOTA HIDENAO , SOGABE FUMIO , NAKAGAWA MISAKO
IPC分类号： G09G3/36 , G09G3/20 , G09G5/00 , G09G5/10 , H04N5/66
摘要： PROBLEM TO BE SOLVED: To provide a display device that correctly recognizes a nonimage part, masks the nonimage part with a gray band of a prescribed luminance level and reduces baking even though the nonimage part has attached information, for example, a logo mark of a broadcasting station or the like.
SOLUTION: In this display device for displaying a video image having an effective image part in an aspect ratio different from an aspect ratio of a display screen, an operation for detecting a nonimage part is performed within a prescribed range obtained by avoiding an attached information area displayed in nonimage part areas at almost four corners of the display screen, and when a nonimage part is detected, a mask video image signal is added to an entered image signal.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供正确地识别非图像部分的显示装置，以规定的亮度级的灰度带掩蔽非图像部分，并且即使非图像部分具有附加信息也减少了烘烤，例如标识广播电台等的标记。解决方案：在用于显示具有与显示屏幕的宽高比不同的纵横比的有效图像部分的视频图像的显示装置中，在通过避免一个或多个图像获得的规定范围内执行用于检测非图像部分的操作附加信息区域显示在显示屏幕的几乎四个角落的非图像部分区域中，并且当检测到非图像部分时，将掩模视频信号添加到输入的图像信号。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2004355013A Video display unit 审中-公开
公开(公告)号：JP2004355013A
公开(公告)日：2004-12-16
申请号：JP2004216688
申请日：2004-07-26
申请人： Hitachi Advanced Digital Inc , Hitachi Ltd , 株式会社日立アドバンストデジタル , 株式会社日立製作所
发明人： NAGATA TATSUO , MATONO TAKAAKI , SAKAI TAKESHI , HASEGAWA AKIRA , SUDO KOICHI
IPC分类号： G09G3/36 , G09G3/20 , G09G5/00 , G09G5/18 , G09G5/36 , G09G5/391 , H04N5/66 , H04N7/01
摘要： PROBLEM TO BE SOLVED: To properly and sharply display an image that a video signal of an arbitrary transmission system represents on a display of an arbitrary screen system.
SOLUTION: A PLL (phase locked loop) 3 and a controller 7 of a video signal processor 9 identify the transmission system of a video signal B sent from a terminal 1 with an identification signal C received at a terminal 4. The PLL 3 divides the reference frequency for phase comparison with the video signal B by using a frequency division ratio suitable to the identified transmission system of the video signal B. An optimum sampling frequency is therefore supplied to an A/D converter 2. The controller 7 determines a vertical enlargement rate of a vertical enlarging circuit 5 and a horizontal enlargement rate of a horizontal enlarging circuit 6 according to the sceeen system of the display 8 and the identified transmission system of the video signal B. Consequently, the a vertical enlarging circuit 5 and horizontal enlarging circuit 6 applies vertical enlargement processing and horizontal enlargement processing for canceling the difference in aspect ratio between the display 8 and video signal B to the video signal B.
COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JP2004320632A Video signal processing circuit, video display unit and method 有权
公开(公告)号：JP2004320632A
公开(公告)日：2004-11-11
申请号：JP2003114527
申请日：2003-04-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OYAMA TOSHIAKI , AOKI KOJI , HASEGAWA AKIRA
IPC分类号： G06T5/00 , H04N5/202
CPC分类号： H04N5/202
摘要： PROBLEM TO BE SOLVED: To obtain a video picture with stable and high contrast depending on the brightness of a screen in a video display unit using a fixed pixel device such as PDP and liquid crystal panels or the like. SOLUTION: As a video signal process, a luminance signal gain is controlled as signal processing for video display by a feedback system based on the maximal luminance level information of digital luminance signals and mean luminance level information and subsequently gamma correction is conducted depending on the mean luminance level information. COPYRIGHT: (C)2005,JPO&NCIPI

7. 发明专利

JP2009124744A Video display device 有权
标题翻译：视频显示设备
公开(公告)号：JP2009124744A
公开(公告)日：2009-06-04
申请号：JP2009011514
申请日：2009-01-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OKA NAOYA , HASEGAWA AKIRA , TSURU YASUTAKA , AOKI KOJI , SAKAMOTO HIROFUMI
IPC分类号： H04N9/64 , H04N5/66 , H04N9/12
摘要： PROBLEM TO BE SOLVED: To improve the contrast sensation, by applying gamma correction processing corresponding to the case where there are a plurality of feature regions which number large in the frequency of a detected luminance histogram.
SOLUTION: APL of an input video signal and a luminance histogram calculation result are used to perform gamma correction processing, corresponding to the brightness of the input video signal, and gradation expansion processing is performed on a plurality of and a large number of feature regions in the frequency of the detected luminance histogram detected so that contrast sensation is improved, by applying an optimal processing according to the input video signal.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了改善对比度感觉，通过对与检测到的亮度直方图的频率中具有大数量的多个特征区域的情况相对应的伽马校正处理来应用伽马校正处理。解决方案：输入视频信号和亮度直方图计算结果的APL用于执行与输入视频信号的亮度对应的伽马校正处理，并且对多个和多个检测到的检测到的亮度直方图的频率的特征区域，通过根据输入的视频信号应用最佳处理，从而改善对比度感觉。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JP2009111936A Video-image display device 审中-公开
标题翻译：视频显示设备
公开(公告)号：JP2009111936A
公开(公告)日：2009-05-21
申请号：JP2007284662
申请日：2007-11-01
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ASAOKA RIKIYA , KIMURA KATSUNOBU , HASEGAWA AKIRA
IPC分类号： G09G3/20 , G09G3/36 , G09G5/00 , G09G5/14 , G09G5/391 , H04N5/45 , H04N7/01
摘要： PROBLEM TO BE SOLVED: To provide a technique that allows display of high-image-quality video images even in the case of two-screen display while suppressing an increase in costs. SOLUTION: When a plurality of video-image signals having different frame rates are input and the video images are displayed on one screen, motion-compensation frame rate conversion processing is executed to any one of the video-image signals by a first FRC 105 so that a frame rate of one video-image signal is equal to that of the other video-image signal. Preferably, the motion-compensation frame rate conversion processing is executed to a video-image signal having a lower frame rate so that a frame rate of the video-image signal having a lower frame rate is matched with a frame rate of a video-image signal having a frame rate higher than that of the video-image signal having a lower frame rate. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供即使在双屏显示的情况下也能够显示高图像质量的视频图像的技术，同时抑制成本的增加。解决方案：当输入具有不同帧速率的多个视频图像信号并且将视频图像显示在一个屏幕上时，通过第一个视频图像信号对任何一个视频图像信号执行运动补偿帧速率转换处理 FRC 105，使得一个视频图像信号的帧速率等于另一个视频图像信号的帧速率。优选地，对具有较低帧速率的视频图像信号执行运动补偿帧速率转换处理，使得具有较低帧速率的视频图像信号的帧速率与视频图像的帧速率匹配信号的帧速率高于具有较低帧速率的视频图像信号的帧速率。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2006311167A Video processor and video display apparatus 有权
标题翻译：视频处理器和视频显示设备
公开(公告)号：JP2006311167A
公开(公告)日：2006-11-09
申请号：JP2005130751
申请日：2005-04-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKO MASAHIRO , HASEGAWA AKIRA , OKA NAOYA , ASAOKA RIKIYA
IPC分类号： H04N5/20 , H04N5/202
摘要： PROBLEM TO BE SOLVED: To provide technology with which videos of high picture quality can be displayed by performing suitable gradation correction.
SOLUTION: A video display apparatus is provided with a brightness correction circuit 30 for correcting the brightness of an inputted video signal, a contrast correction circuit 40 for correcting the contrast of the brightness-corrected luminance signal, a gamma correction circuit 50 for performing gamma correction for the contrast-corrected luminance signal, and a control circuit 20. The control circuit 20 controls the brightness correction circuit 30 by using a first luminance histogram indicating the histogram of luminance obtained from luminance signals of the same frame or the same field and controls the gamma correction circuit 50 by using a second luminance histogram generated by changing the first luminance histogram.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供通过执行适当的灰度校正可以显示高图像质量的视频的技术。解决方案：视频显示装置设置有用于校正输入的视频信号的亮度的亮度校正电路30，用于校正亮度校正的亮度信号的对比度的对比度校正电路40，用于对对比度校正的亮度信号进行伽马校正，以及控制电路20.控制电路20通过使用表示从相同帧或相同场的亮度信号获得的亮度的直方图的第一亮度直方图来控制亮度校正电路30 并且通过使用通过改变第一亮度直方图而产生的第二亮度直方图来控制伽马校正电路50。版权所有（C）2007，JPO＆INPIT

10. 发明专利

JP2006311162A Video processor 有权
标题翻译：视频处理器
公开(公告)号：JP2006311162A
公开(公告)日：2006-11-09
申请号：JP2005130737
申请日：2005-04-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OKA NAOYA , NAKO MASAHIRO , HASEGAWA AKIRA , ASAOKA RIKIYA , HONDA DAISUKE
IPC分类号： H04N5/16 , G09G5/00
CPC分类号： H04N5/20
摘要： PROBLEM TO BE SOLVED: To provide a video processor capable of performing black extension processing more favorably and displaying high-quality video images.
SOLUTION: This video processor is provided with a luminance feature detection unit (4) for detecting a frequency in each of a plurality of luminance regions at least not higher than predetermined luminance by using an inputted video signal, a black extension processing portion (6) for performing black extension processing concerning luminance signals not higher than the predetermined luminance level of the video signal, and a microcomputer (5) which controls the quantity of the black extension of the black extension processing portion by using the frequency in each of the plurality of luminance regions detected by the detection unit.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供能够更有利地执行黑色扩展处理并且显示高质量视频图像的视频处理器。解决方案：该视频处理器设置有亮度特征检测单元（4），用于通过使用输入的视频信号来检测至少不高于预定亮度的多个亮度区域中的每一个中的频率，黑色扩展处理部分（6），用于对不高于视频信号的预定亮度级的亮度信号执行黑色扩展处理;以及微计算机（5），其通过使用每个中的频率来控制黑色扩展处理部分的黑色扩展量由检测单元检测的多个亮度区域。版权所有（C）2007，JPO＆INPIT

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