公开(公告)号：US07847757B2

公开(公告)日：2010-12-07

申请号：US10733304

申请日：2003-12-12

Applicant: Hiroyuki Urakami ,  Hirofumi Honda ,  Takashi Okushima ,  Tetsuya Shigeta ,  Tetsuro Nagakubo

Inventor： Hiroyuki Urakami ,  Hirofumi Honda ,  Takashi Okushima ,  Tetsuya Shigeta ,  Tetsuro Nagakubo

IPC: G09G3/28

CPC classification number: G09G3/2944 ,  G09G3/2037 ,  G09G2320/0271 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2320/066 ,  G09G2360/16

Abstract: Prepared is brightness frequency data that indicates the number of pixels, having the same brightnesses in a brightness distribution for each of the fields represented by an input image signal. Based on the brightness frequency data, the number of subfields for emission at each brightness in a brightness region is adjusted for each of at least two brightness regions. As a result, the greater the frequency indicating the total number of pixels at each of the same brightnesses in a brightness region, the larger the number of subfields allocated to that brightness region. Therefore, satisfactory grayscale representation suitable to human visual characteristics is achieved.

Abstract translation: 准备的是指示由输入图像信号表示的每个场的亮度分布具有相同亮度的像素数的亮度频率数据。 基于亮度频率数据，对于至少两个亮度区域中的每一个调整亮度区域中的每个亮度处的用于发射的子场的数量。 结果，指示亮度区域中每个相同亮度处的像素总数的频率越大，分配给该亮度区域的子场的数量越多。 因此，实现了适合于人类视觉特征的满意的灰度表示。

公开(公告)号：US07317431B2

公开(公告)日：2008-01-08

申请号：US10882152

申请日：2004-07-01

Applicant: Masahiro Suzuki ,  Jun Kamiyamaguchi ,  Tetsuya Shigeta ,  Hirofumi Honda ,  Tetsuro Nagakubo

Inventor： Masahiro Suzuki ,  Jun Kamiyamaguchi ,  Tetsuya Shigeta ,  Hirofumi Honda ,  Tetsuro Nagakubo

IPC: G09G3/28

CPC classification number: G09G3/2803 ,  G09G3/2022 ,  G09G3/204 ,  G09G3/2051 ,  G09G3/2059 ,  G09G3/2077 ,  G09G3/2935 ,  G09G2320/0261

Abstract: A method of grayscale-driving a display panel in accordance with pixel data derived from a video signal. The display panel includes a plurality of display lines, with a plurality of pixel cells serving as pixels being arranged on each display line. A display period of a single field of the video signal is divided into a plurality of subfields. The method includes dividing one subfield into M lower subfields. M is an integer greater than one. M groups of display lines are prepared by sequentially taking every M display lines from the display lines. First to Mth address steps are performed in the M lower subfields respectively and sequentially. Each address step sets the pixel cells belonging to the display lines of the display line group concerned, to a drive mode determined by the pixel data. A first light emission step is performed to cause the pixel cells whose drive mode is a lit mode, to emit light directly before or after the address step concerned. Another subfield is divided into N lower subfields. N is smaller than M. N groups of L continuos address steps are prepared from the first to Mth address steps. L is an integer greater than one. The N groups of L continuous address steps are performed in the N lower subfields respectively and sequentially. A second light emission step is performed to cause the pixel cells whose drive mode is the lit mode, to emit light directly before or after the address step group concerned.

Abstract translation: 根据从视频信号导出的像素数据对显示面板进行灰度驱动的方法。 显示面板包括多个显示线，多个像素单元用作像素，布置在每条显示行上。 视频信号的单个场的显示周期被分成多个子场。 该方法包括将一个子字段划分为M个较低的子字段。 M是大于1的整数。 通过从显示行顺序地取出每个M条显示行来准备M组显示行。 首先到M个地址步骤分别在M个较低的子字段中顺序执行。 每个地址步骤将属于所涉显示行组的显示行的像素单元设置为由像素数据确定的驱动模式。 执行第一发光步骤以使驱动模式为点亮模式的像素单元在所涉及的地址步骤之前或之后直接发光。 另一个子场分为N个下部子场。 N小于M.从第一到第M地址步骤准备N组L个连续地址步骤。 L是大于1的整数。 分别在N个下部子场中依次执行N组L个连续地址步骤。 执行第二发光步骤以使驱动模式为点亮模式的像素单元在所涉及的地址步骤组之前或之后直接发光。

公开(公告)号：US07142174B2

公开(公告)日：2006-11-28

申请号：US09883448

申请日：2001-06-19

Applicant: Hirofumi Honda ,  Tetsuya Shigeta ,  Tetsuro Nagakubo

Inventor： Hirofumi Honda ,  Tetsuya Shigeta ,  Tetsuro Nagakubo

IPC: G09G3/28

CPC classification number: G09G3/2055 ,  G09G3/2922 ,  G09G3/2932 ,  G09G3/2935 ,  G09G3/294 ,  G09G3/2946 ,  G09G2310/0218

Abstract: A driving method of a plasma display panel capable of executing a dither processing without lowering display quality. When only discharge cells set to a light emission cell state in accordance with input image signals are allowed to emit light a predetermined number of light emissions allotted in accordance with weighting of sub-fields, the number of light emissions to be allotted is rendered different for each discharge cell inside a discharge cell block.

公开(公告)号：US20060007068A1

公开(公告)日：2006-01-12

申请号：US11176471

申请日：2005-07-08

Applicant: Masahiro Suzuki ,  Tetsuya Shigeta

Inventor： Masahiro Suzuki ,  Tetsuya Shigeta

IPC: G09G3/28

CPC classification number: G09G3/2029 ,  G09G3/204 ,  G09G3/2055 ,  G09G3/2803 ,  G09G3/2935 ,  G09G3/2937 ,  G09G2310/0218 ,  G09G2320/0266 ,  G09G2320/0271 ,  G09G2360/16

Abstract: A method of driving a display panel for displaying a quality image reduced of display noise. A first process is executed for making the sub-field different between display lines adjacent in the number of M, in order for causing the state of the pixel cells to transfer from the one state into the other state of on and off modes, in a particular sub-field group having sub-fields in number of M (M: integer of 2 or greater) arranged successive within the frame display period and in a subsequent sub-field group of among sub-field groups subsequent to the particular sub-field group. Within the particular sub-field group, executed is any one of a second process for causing a state of the pixel cells from the one state into the other state only within a predetermined one of the sub-fields of the particular sub-field group and the first process.

公开(公告)号：US20050200571A1

公开(公告)日：2005-09-15

申请号：US11072648

申请日：2005-03-07

Applicant: Akira Gotoda ,  Tetsuya Shigeta ,  Masahiro Suzuki ,  Jun Kamiyamaguchi

Inventor： Akira Gotoda ,  Tetsuya Shigeta ,  Masahiro Suzuki ,  Jun Kamiyamaguchi

IPC: H04N5/66 ,  G09G3/20 ,  G09G3/28 ,  G09G3/288 ,  G09G3/291 ,  G09G3/294 ,  G09G3/298

CPC classification number: G09G3/2007 ,  G09G3/2022 ,  G09G3/288 ,  G09G2320/0223 ,  G09G2320/0233 ,  G09G2320/0261 ,  G09G2320/0271 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2360/16

Abstract: The object is to provide a display device in which high-quality image display that is free from luminance nonuniformity can be obtained with a simplified structure. A magnitude of load corresponding to the light emission state of each pixel cell on a display line is measured for each display line based on a video signal, and correction of the luminance level according to the magnitude of load corresponding to the display line is conducted for the interval of the video signal corresponding to each display line.

Abstract translation: 本发明的目的是提供一种显示装置，其中可以以简化的结构获得不具有亮度不均匀性的高质量图像显示。 对于每个显示行，基于视频信号测量对应于显示线上的每个像素单元的发光状态的负载的大小，并且对与显示行相对应的负载的大小进行亮度级的校正，进行 每个显示行对应的视频信号的间隔。

公开(公告)号：US20050078060A1

公开(公告)日：2005-04-14

申请号：US10625750

申请日：2003-07-24

Applicant: Tetsuya Shigeta ,  Hitoshi Mochizuki ,  Masahiro Suzuki ,  Nobuhiko Saegusa

Inventor： Tetsuya Shigeta ,  Hitoshi Mochizuki ,  Masahiro Suzuki ,  Nobuhiko Saegusa

IPC: G09G3/20 ,  G09G3/292 ,  G09G3/293 ,  G09G3/294 ,  G09G3/28

CPC classification number: G09G3/2935 ,  G09G3/2022 ,  G09G3/204 ,  G09G3/2055 ,  G09G3/2059 ,  G09G3/2077 ,  G09G3/2927 ,  G09G3/2932 ,  G09G3/2937 ,  G09G3/2944 ,  G09G2310/0224 ,  G09G2320/0247 ,  G09G2320/0271 ,  G09G2320/0276 ,  G09G2320/0626 ,  G09G2360/02 ,  G09G2360/16

Abstract: The object of the invention is to provide a method for driving a plasma display panel that provides an improved expression of levels of halftone as well as an improved display quality. In N sub-fields constituting a display period of one field, when a pixel data writing step for setting discharge cells to either one of non-light-emitting cells or light-emitting cells in response to pixel data and a light-emission sustaining step for allowing only the aforementioned light-emitting cells to emit light only during a light-emission period corresponding to weights assigned to the sub-fields respectively are executed, the light-emission period in the light-emission sustaining step of the respective sub-fields is changed field by field or frame by frame. According to another aspect, the invention allows for carrying out selectively a first drive pattern or a second drive pattern. The first drive pattern is carried out by alternating, field by field (frame by frame) in response to the type of input video signals, first and second light-emission drive sequences which have mutually different ratios of the number of times of light-emissions in the light-emission sustaining step during one field (one frame). The second drive pattern is carried out by alternating, field by field (frame by frame) in response to the type of input video signals, third and fourth light-emission drive sequences which have mutually different ratios of the number of times of light-emissions in the aforementioned light-emission sustaining step.

公开(公告)号：US20050001929A1

公开(公告)日：2005-01-06

申请号：US10878517

申请日：2004-06-29

Applicant: Kazunori Ochial ,  Hiroshi Ando ,  Tetsuya Shigeta ,  Tetsuro Nagakubo

Inventor： Kazunori Ochial ,  Hiroshi Ando ,  Tetsuya Shigeta ,  Tetsuro Nagakubo

IPC: H04N7/01 ,  H04N11/20

CPC classification number: H04N7/012 ,  H04N7/0112

Abstract: A video signal converting apparatus and method for improving display quality of video signals from both film source and video source. It is discriminated whether the input video signal is an interlaced video signal or not, and it is discriminated whether the input video signal is a video signal from a film source based on a film. If the input video signal is discriminated as interlaced video signals, the input video signal is converted, for outputting, to the progressive video signals by a converting method in accordance with a discrimination result regarding whether the input video signal is a video signal from the film source or not. The converted progressive video signal is converted, for outputting, to a video signal having a high frame rate in accordance with the discrimination result regarding whether the converted progressive video signal is a video signal from the film source or not. If the input video signal is not discriminated as an interlaced video signal, the input video signal is converted to a video signal having a high frame rate in accordance with a discrimination result regarding whether the input video signal is a video signal from the film source or not.

Abstract translation: 一种用于提高来自电影源和视频源的视频信号的显示质量的视频信号转换装置和方法。 鉴别输入视频信号是否是隔行扫描视频信号，并且基于电影来区分输入视频信号是否是来自胶片源的视频信号。 如果输入视频信号被鉴别为隔行视频信号，则根据关于输入视频信号是否是来自该影片的视频信号的鉴别结果，通过转换方法将输入视频信号转换成逐行视频信号 来源与否 根据关于转换的逐行视频信号是否是来自电影源的视频信号的判别结果，转换的逐行视频信号被转换以输出到具有高帧速率的视频信号。 如果输入视频信号未被鉴别为隔行扫描视频信号，则根据关于输入视频信号是否是来自胶片源的视频信号的鉴别结果，将输入视频信号转换为具有高帧率的视频信号，或者 不。

公开(公告)号：US06798393B2

公开(公告)日：2004-09-28

申请号：US09894834

申请日：2001-06-29

Applicant: Hirofumi Honda ,  Tetsuya Shigeta ,  Tetsuro Nagakubo

Inventor： Hirofumi Honda ,  Tetsuya Shigeta ,  Tetsuro Nagakubo

IPC: G09G328

CPC classification number: G09G3/2022 ,  G09G3/293 ,  G09G3/2948 ,  G09G2320/0271 ,  G09G2320/0626 ,  G09G2360/16

Abstract: A plasma display device capable of providing high luminance display. In each subfield, a non-selected line on which all the discharge cells are not subjected to selective discharge is detected, and pixel data writing scanning is performed only to display lines excluding such non-selected lines.

Abstract translation: 能够提供高亮度显示的等离子体显示装置。 在每个子场中，检测所有放电单元未经受选择性放电的非选择线，并且仅对除了这些未选择线之外的线进行像素数据写入扫描。

公开(公告)号：US06465970B2

公开(公告)日：2002-10-15

申请号：US09863757

申请日：2001-05-24

Applicant: Tetsuro Nagakubo ,  Tetsuya Shigeta ,  Hirofumi Honda

Inventor： Tetsuro Nagakubo ,  Tetsuya Shigeta ,  Hirofumi Honda

IPC: G09G310

CPC classification number: G09G3/2022 ,  G09G3/2927 ,  G09G2310/066 ,  G09G2320/0228 ,  G09G2320/0238 ,  G09G2340/16 ,  G09G2360/16

Abstract: A plasma display device which improves the contrast of an image displayed. The plasma display device includes a plurality of row electrodes formed in pairs corresponding to each display line, a plurality of column electrodes arranged to cross the row electrodes to form a discharge cell corresponding to one pixel at each intersection with a pair of said row electrodes, and a driving controller for controlling driving of the row and column electrodes. A gradation display of input pixel data is performed by dividing one field display period into a plurality of subfields. The driving controller, when one field of input pixel data is displayed, changes the number of reset discharges for initializing all discharge cells in accordance with an average luminance value of input pixel data in the preceding field.

Abstract translation: 一种提高显示图像的对比度的等离子体显示装置。 等离子体显示装置包括与每条显示线对成对成对的多个行电极，多个列电极布置成与行电极交叉，以形成对应于与一对所述行电极在每个交叉处的一个像素的放电单元， 以及用于控制行和列电极的驱动的驱动控制器。 通过将一个场显示周期划分为多个子场来执行输入像素数据的灰度显示。 当显示输入像素数据的一个场时，驱动控制器根据前一场中的输入像素数据的平均亮度值改变用于初始化所有放电单元的复位放电次数。

公开(公告)号：US5659226A

公开(公告)日：1997-08-19

申请号：US423949

申请日：1995-04-19

Applicant: Tetsuya Shigeta

Inventor： Tetsuya Shigeta

IPC: G09G3/288 ,  G09G3/291 ,  G09G3/292 ,  G09G3/294 ,  G09G3/298 ,  H01J11/12 ,  H01J11/22 ,  H01J11/24 ,  H01J11/26 ,  H01J11/28 ,  H01J11/32 ,  H01J11/34 ,  H01J11/36 ,  H01J11/38 ,  H01J11/42 ,  H01J17/49 ,  G09G3/10

CPC classification number: H01J11/12 ,  G09G3/293 ,  G09G2300/0452 ,  H01J2211/245

Abstract: A plasma display apparatus is adapted to the increase in fineness of the display. Column electrodes extend in parallel in the vertical direction. Light emission layers are made of fluorescent material films of R, G, and B and extend in parallel along the column electrodes and in which light emission colors of the adjacent layers are different. Row electrodes Xi extend in the horizontal direction and form pixel cells PU at positions near the intersecting portions with the column electrodes. Among the pixel cells, two cells which are neighboring in the horizontal direction are arranged so as to deviate from each other in the vertical direction.

Abstract translation: 等离子体显示装置适用于显示器细度的提高。 列电极在垂直方向上平行延伸。 发光层由R，G和B的荧光材料膜制成，沿着列电极平行延伸，相邻层的发光颜色不同。 行电极Xi在水平方向上延伸，并且在与列电极的交叉部分附近的位置处形成像素单元PU。 在像素单元中，在水平方向上相邻的两个单元被布置成在垂直方向上彼此偏离。