专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US11947201B2 Liquid crystal device, display device, optical modulation module, and control method of liquid crystal device 有权
公开(公告)号：US11947201B2
公开(公告)日：2024-04-02
申请号：US18173910
申请日：2023-02-24
申请人： SEIKO EPSON CORPORATION
发明人： Hiroyuki Hosaka , Akihide Haruyama
IPC分类号： G02F1/1335 , G02F1/01 , G02F1/133 , G02F1/13363 , G02F1/1347
CPC分类号： G02F1/0136 , G02F1/13306 , G02F1/133528 , G02F1/13363 , G02F1/1347
摘要： A liquid crystal device includes a liquid crystal panel including a liquid crystal layer as a first liquid crystal layer, a first polarizing element, a second polarizing element, a first phase difference adjusting element arranged between the first polarizing element and the liquid crystal panel and including a liquid crystal layer as a second liquid crystal layer, a second phase difference adjusting element arranged between the liquid crystal panel and the second polarizing element and including a liquid crystal layer as a third liquid crystal layer, and a first phase difference controlling element driving unit and a second phase difference controlling element driving unit as control units configured to control a value of a voltage applied to the first phase difference adjusting element and the second phase difference adjusting element, based on image data input to the liquid crystal panel.

2. 发明授权

US11595627B2 Liquid crystal projector 有权
公开(公告)号：US11595627B2
公开(公告)日：2023-02-28
申请号：US17012133
申请日：2020-09-04
申请人： SEIKO EPSON CORPORATION
发明人： Hiroyuki Hosaka
IPC分类号： H04N9/31 , G09G3/36
摘要： A liquid crystal projector includes a liquid crystal panel having a pixel circuit that modulates light based on video data corresponding to each of pixels, and a shift device configured to shift the modulated light by the pixel circuit so that a position of a projected pixel on a screen by the modulated light is shifted for each of the pixels, wherein the pixel circuit modulates n pixels of a first group, n being an integer of 2 or more, from among pixels of an image specified by video data in first frame period, and modulates n pixels of a second group in second frame period next to the first frame period, and the n pixels of the first group are different from the n pixels of the second group.

3. 发明授权

US10444574B2 Liquid crystal display and electronic equipment 有权
公开(公告)号：US10444574B2
公开(公告)日：2019-10-15
申请号：US16039816
申请日：2018-07-19
申请人： SEIKO EPSON CORPORATION
发明人： Kazuhisa Mizusako , Hiroyuki Hosaka
IPC分类号： G09G3/36 , G02F1/1343 , G02F1/1335 , G02F1/1362 , G02F1/1337 , G02F1/13363
摘要： A liquid crystal display to suppress a reverse tilt domain that includes pixel electrodes, a first light-shielding film arranged in a first direction along a first side of the pixel electrodes; a second light-shielding film arranged in a second direction along a second side of the pixel electrodes, a correction unit corrects a first input image signal so that a first difference between a first voltage applied to the first pixel electrode and a second voltage applied to a second pixel electrode, and a second difference between the first voltage and a third voltage to be applied to a third pixel electrode are reduced. A width of the first light-shielding film is narrower than a width of the second light-shielding film. The correction unit corrects the first input image signal so that a decreased amount of the first difference is greater than a decreased amount of the second difference.

4. 发明授权

US10250780B2 Video processing method, video processing circuit, liquid crystal display, and electronic apparatus 有权
公开(公告)号：US10250780B2
公开(公告)日：2019-04-02
申请号：US15253857
申请日：2016-08-31
申请人： SEIKO EPSON CORPORATION
发明人： Hiroyuki Hosaka , Taku Kitagawa
IPC分类号： G09G3/36 , H04N5/14
摘要： A video processing circuit detects a risk boundary, which a portion of the boundary between a dark pixel and a bright pixel in an image represented by a video signal Vid-in, and is determined by a tilt azimuth of liquid crystal molecules, from the boundary, and corrects a video signal corresponding to at least one of the dark pixel and the bright pixel which is contiguous to the detected risk boundary in at least one field of a plurality of fields constituting one frame such that a period in which the risk boundary is present in one frame period is shortened.

5. 发明授权

US10121400B2 Video processing circuit, electro-optical device, electronic apparatus, and video processing method 有权
公开(公告)号：US10121400B2
公开(公告)日：2018-11-06
申请号：US15488038
申请日：2017-04-14
申请人： SEIKO EPSON CORPORATION
发明人： Kazuhisa Mizusako , Hiroyuki Hosaka
IPC分类号： G09G3/00 , G02F1/1337 , G02F1/1362 , G02F1/1368 , G09G3/36
摘要： A video processing circuit includes a detecting unit that detects a set of a first pixel and a second pixel adjacent to the first pixel, which is a set of pixels in which a difference between application voltages to the first pixel and the second pixel which are indicated by an input video signal is greater than or equal to a threshold; an acquisition unit that acquires information which specifies a plurality of regions of voltage-brightness characteristics which are voltage-brightness characteristics of the pixel group and in which a voltage region is separated into the plurality of regions in accordance with a slope of the voltage-brightness characteristics; and a replacing unit that replaces the application voltage to the first pixel with a voltage which is in a region other than a first region and is close to a second region.

6. 发明授权

US10109254B2 Video processing circuit, video processing method, electro-optical device, and electronic apparatus 有权
公开(公告)号：US10109254B2
公开(公告)日：2018-10-23
申请号：US15113423
申请日：2015-01-21
申请人： SEIKO EPSON CORPORATION
发明人： Kazuhisa Mizusako , Hiroyuki Hosaka
IPC分类号： G09G3/36 , G02F1/1343 , G02F1/1362 , G02F1/1368
摘要： A video processing circuit detects a boundary between a first pixel to which an application voltage which is a first voltage is applied, and a second pixel to which an application voltage which is a second voltage higher than the first voltage is applied, based on a video signal indicating a video which alternately switches a first video and a second video which is obtained by moving in parallel with the first video for each unit frame, corrects the application voltage such that a fringe electric field occurring at the boundary is decreased, when determining a boundary detected by the boundary detection unit in a kth unit frame does not exist in a (k−2)th unit frame, and the boundary is a boundary which is moved from a (k−1)th unit frame to the kth unit frame, and outputs the corrected video signal such that the liquid crystal panel is driven.

7. 发明授权

US09667931B2 Electro-optic apparatus and control method thereof 有权
公开(公告)号：US09667931B2
公开(公告)日：2017-05-30
申请号：US15099163
申请日：2016-04-14
申请人： SEIKO EPSON CORPORATION
发明人： Takashi Nishimori , Hiroyuki Hosaka
IPC分类号： H04N9/31
CPC分类号： H04N9/3188 , H04N9/312
摘要： A projector includes a liquid crystal panel, an optical path shifting element which is capable of changing the optical path of light emitted from the liquid crystal panel, and an image processing unit. The optical path shifting element performs pixel shift such that light reaches different positions of a display screen in respective first to fourth unit periods acquired by dividing one frame into four parts. The image processing unit includes a conversion unit which converts a high resolution image signal into a low resolution image signal, and generates an output image signal by performing an overdrive process on the low resolution image signal according to a pixel shift state.

8. 发明申请

US20130241914A1 SIGNAL PROCESSING DEVICE, LIQUID CRYSTAL APPARATUS, ELECTRONIC EQUIPMENT, AND SIGNAL PROCESSING METHOD 有权
标题翻译：信号处理装置，液晶装置，电子设备和信号处理方法
公开(公告)号：US20130241914A1
公开(公告)日：2013-09-19
申请号：US13793713
申请日：2013-03-11
申请人： SEIKO EPSON CORPORATION
发明人： Taku Kitagawa , Hiroyuki Hosaka , Hidehito Iisaka
IPC分类号： G09G3/36
CPC分类号： G09G3/3696 , G09G3/3648 , G09G2320/0209 , G09G2340/16 , G09G2360/16
摘要： A signal processing device which is used in a liquid crystal apparatus, includes a detection portion that detects a boundary between a first pixel to which a first voltage lower than a first reference voltage is applied and a second pixel to which a second voltage higher than a second reference voltage is applied on the basis of signals for controlling voltages applied to a plurality of pixels, and a correction portion that corrects the first voltage correlated with the first pixel to a third voltage which is higher than the first voltage and lower than the second voltage correlated with the second pixel.
摘要翻译：一种在液晶装置中使用的信号处理装置，包括：检测部，其检测与施加了比第一基准电压低的第一电压的第一像素与第一像素之间的边界，第二像素的第二电压高于基于用于控制施加到多个像素的电压的信号和将与第一像素相关的第一电压校正为高于第一电压并低于第二像素的第三电压的校正部分来施加第二参考电压电压与第二像素相关。

9. 发明申请

US20130194249A1 VIDEO PROCESSING CIRCUIT, VIDEO PROCESSING METHOD, LIQUID CRYSTAL DISPLAY DEVICE, AND ELECTRONIC APPARATUS 有权
标题翻译：视频处理电路，视频处理方法，液晶显示装置和电子装置
公开(公告)号：US20130194249A1
公开(公告)日：2013-08-01
申请号：US13748513
申请日：2013-01-23
申请人： Seiko Epson Corporation
发明人： Taku Kitagawa , Hiroyuki Hosaka
IPC分类号： G09G3/36
CPC分类号： G09G3/3696 , G09G3/3614 , G09G3/3648 , G09G2320/0261 , G09G2340/0435 , G09G2360/16
摘要： A video processing circuit includes a boundary detection unit which detects a boundary between a first pixel in which an application voltage which is designated by a video signal Vid-in is lower than a first voltage and a second pixel which exceeds a second voltage in which the application voltage is higher than the first voltage in a normally black mode; and a correction unit which corrects a video signal in which an application voltage to a liquid crystal element corresponding to the first pixel which comes into contact with a boundary detected by the boundary detection unit is designated to be a video signal in which a correction voltage which is higher than the application voltage is designated in a part of period of one frame period, and a correction voltage which is lower than the application voltage is designated in other periods of the one frame period.
摘要翻译：视频处理电路包括边界检测单元，其检测其中由视频信号Vid-in指定的施加电压低于第一电压的第一像素与超过第一电压的第二像素之间的边界，其中，在常黑模式下，施加电压高于第一电压; 以及校正单元，其校正其中对与由边界检测单元检测到的边界接触的第一像素的液晶元件的施加电压指定为视频信号的视频信号，其中校正电压高于在一帧周期的一部分周期中指定的施加电压，并且在一个帧周期的其他周期中指定低于施加电压的校正电压。

10. 发明申请

US20130169703A1 DRIVER UNIT FOR ELECTRO-OPTICAL DEVICE, ELECTRO-OPTICAL DEVICE, ELECTRONIC EQUIPMENT, AND METHOD FOR DRIVING ELECTRO-OPTICAL DEVICE 有权
标题翻译：用于电光器件的驱动单元，电光器件，电子设备和用于驱动电光器件的方法
公开(公告)号：US20130169703A1
公开(公告)日：2013-07-04
申请号：US13726898
申请日：2012-12-26
申请人： Seiko Epson Corporation
发明人： Kazuhisa Mizusako , Hiroyuki Hosaka
IPC分类号： G09G5/10
CPC分类号： G09G5/10 , G09G3/2022 , G09G3/3614 , G09G3/3648 , G09G2320/0252 , G09G2340/16
摘要： A liquid crystal display device is configured so that one frame is divided into two fields and a pixel of a liquid crystal panel is driven. The liquid crystal display device performs overdrive when a gray-scale level to be supplied to the pixel is different between a previous frame and a current frame. The liquid crystal display writes a voltage corresponding to the gray-scale level of the pixel with a positive voltage in a first field, and writes a voltage corresponding to the gray-scale level to be supplied to the pixel with a negative voltage in a second field. When performing overdrive, the liquid crystal display device performs overdrive in both of the first field and the second field. Also, when performing overdrive, the liquid crystal display device corrects the gray-scale level to be supplied to the pixel.
摘要翻译：液晶显示装置被配置为使得一个帧被分成两个场并且驱动液晶面板的像素。当要提供给像素的灰度级别在前一帧和当前帧之间时，液晶显示装置执行过驱动。液晶显示器在第一场中以正电压将与像素的灰度级相对应的电压写入与第二场中具有负电压的要提供给像素的灰度级相对应的电压领域。当执行过驱动时，液晶显示装置在第一场和第二场中都执行过驱动。此外，当执行过驱动时，液晶显示装置校正要提供给像素的灰度级。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式