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公开(公告)号：US20150279294A1
公开(公告)日：2015-10-01
申请号：US14432766
申请日：2013-07-26
Applicant: SHARP KABUSHIKI KAISHA
Inventor： Ken Inada , Taketoshi Nakano , Akizumi Fujioka , Asahi Yamato
IPC: G09G3/36
CPC classification number: G09G3/3614 , G09G3/3688 , G09G2320/0247 , G09G2320/0252 , G09G2320/0285 , G09G2320/041 , G09G2320/046 , G09G2320/064 , G09G2320/10 , G09G2320/103 , G09G2330/021 , G09G2330/023 , G09G2330/04 , G09G2340/0435 , G09G2340/16 , G09G2360/16
Abstract: Grayscale values for previous and current frames are different, and therefore, an overshoot voltage, which has a higher absolute value than a signal voltage, are applied to a data signal line. Next, in a second drive frame, normal drive is performed, so that a signal voltage of the same polarity as the overshoot voltage is written to the data signal line. Moreover, in a first drive frame of a third pause drive period, the grayscale values for the previous and current frames are equal, and also greater than or equal to a boundary value, and therefore, undershoot drive is performed. An undershoot voltage, which has a lower absolute value than a signal voltage, is applied to the data signal line. Next, in a second drive frame, normal drive is performed, so that a signal voltage of the same polarity as the undershoot voltage is written to the data signal line.
Abstract translation: 前一帧和当前帧的灰度值不同，因此，具有比信号电压更高的绝对值的过冲电压被施加到数据信号线。 接下来，在第二驱动帧中，执行正常驱动，使得与过冲电压具有相同极性的信号电压被写入数据信号线。 此外，在第三暂停驱动周期的第一驱动帧中，前一帧和当前帧的灰阶值相等，并且也大于或等于边界值，因此执行下冲驱动。 具有比信号电压更低的绝对值的下冲电压被施加到数据信号线。 接下来，在第二驱动帧中，执行正常驱动，使得与下冲电压具有相同极性的信号电压被写入数据信号线。
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公开(公告)号：US09959825B2
公开(公告)日：2018-05-01
申请号：US14780639
申请日：2014-02-21
Applicant: Sharp Kabushiki Kaisha
Inventor： Fumiyuki Kobayashi , Asahi Yamato , Akizumi Fujioka , Ken Inada
CPC classification number: G09G3/3648 , G09G3/2092 , G09G3/3611 , G09G3/3614 , G09G3/3696 , G09G2300/0452 , G09G2310/027 , G09G2320/02 , G09G2320/0252 , G09G2320/046 , G09G2330/021 , G09G2340/16 , G09G2360/16 , G09G2360/18
Abstract: A liquid crystal display device that performs intermittent driving involving a driving period and an idle period includes a gray scale level control unit that generates, from an input image signal, an image signal for display and an image signal for correction. A signal line control unit writes the image signal for correction to the plurality of signal lines before writing the image signal for display during a driving period. An LUT stores a correction gray scale value associated with a gray scale value of at least a current frame. An adding circuit corrects the input image signal based on the correction gray scale value read from the LUT. The subtracting circuit specifies, in a pixel region, a regular image pattern including at least a first pixel and a second pixel and changes an output from the adding circuit for the first image by a predetermined gray scale width.
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公开(公告)号：US09773462B2
公开(公告)日：2017-09-26
申请号：US14420956
申请日：2013-06-13
Applicant: Sharp Kabushiki Kaisha
Inventor： Ken Inada , Taketoshi Nakano , Akizumi Fujioka , Asahi Yamato
CPC classification number: G09G3/3607 , G09G3/3614 , G09G3/3648 , G09G3/3685 , G09G2310/027 , G09G2310/06 , G09G2310/065 , G09G2320/0242 , G09G2320/0247 , G09G2320/0252 , G09G2320/0285 , G09G2320/041 , G09G2330/023 , G09G2340/16 , G09G2360/12 , G09G2360/16 , G09G2360/18
Abstract: The present invention provides a liquid crystal display device capable of suppressing a decrease in display quality when pause drive is performed in an alternating-voltage drive mode, as well as a method for driving the same.In a first drive frame, overshoot drive is performed using correction values provided by an LUT to apply overshoot voltages whose absolute values are higher than absolute values of signal voltages to data signal lines. Subsequently, in a second drive frame, normal drive is performed to write signal voltages of the same polarity as the overshoot drive voltages to the data signal lines. Thereafter, a pause period in which an image written by normal drive is displayed continues until the start of a drive period in the next pause drive period. As a result, a decrease in luminance immediately after the signal voltages are written during the second drive frame is suppressed significantly, so that the viewer barely recognizes flicker.
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公开(公告)号：US09761187B2
公开(公告)日：2017-09-12
申请号：US14432766
申请日：2013-07-26
Applicant: Sharp Kabushiki Kaisha
Inventor： Ken Inada , Taketoshi Nakano , Akizumi Fujioka , Asahi Yamato
IPC: G09G3/36
CPC classification number: G09G3/3614 , G09G3/3688 , G09G2320/0247 , G09G2320/0252 , G09G2320/0285 , G09G2320/041 , G09G2320/046 , G09G2320/064 , G09G2320/10 , G09G2320/103 , G09G2330/021 , G09G2330/023 , G09G2330/04 , G09G2340/0435 , G09G2340/16 , G09G2360/16
Abstract: Grayscale values for previous and current frames are different, and therefore, an overshoot voltage, which has a higher absolute value than a signal voltage, are applied to a data signal line. Next, in a second drive frame, normal drive is performed, so that a signal voltage of the same polarity as the overshoot voltage is written to the data signal line. Moreover, in a first drive frame of a third pause drive period, the grayscale values for the previous and current frames are equal, and also greater than or equal to a boundary value, and therefore, undershoot drive is performed. An undershoot voltage, which has a lower absolute value than a signal voltage, is applied to the data signal line. Next, in a second drive frame, normal drive is performed, so that a signal voltage of the same polarity as the undershoot voltage is written to the data signal line.
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公开(公告)号：US20150255040A1
公开(公告)日：2015-09-10
申请号：US14428010
申请日：2013-07-26
Applicant: SHARP KABUSHIKI KAISHA
Inventor： Ken Inada , Taketoshi Nakano , Akizumi Fujioka , Kazuki Takahashi
CPC classification number: G09G5/18 , G09G3/3611 , G09G3/3614 , G09G5/02 , G09G2310/0202 , G09G2310/04 , G09G2330/021
Abstract: There is provided a display device capable of suppressing brightness change which can occur at the time of image update in intermission driving. A display control circuit (20) includes a frame memory (101), a coercive refreshing determination section (104), a refreshing circuit (105), and an undershoot circuit (106). The coercive refreshing determination section (104) outputs an active coercive refreshing signal and an active correction instruction signal upon determining that an image is updated. The refreshing circuit (105) receives the active coercive refreshing signal, and then outputs an active output control signal. The frame memory (101) receives the active output control signal, and then outputs an image data. The undershoot circuit (106) performs, if in reception of the active correction instruction signal, a correction by making a subtracting operation to the image data received from the frame memory (101), and then outputs corrected image data.
Abstract translation: 提供了一种能够抑制在间歇性驾驶中图像更新时可能发生的亮度变化的显示装置。 显示控制电路（20）包括帧存储器（101），矫顽刷新判定部（104），刷新电路（105）和下冲电路（106）。 强制刷新确定部分（104）在确定图像被更新时输出主动矫顽刷新信号和主动校正指令信号。 刷新电路（105）接收主动矫顽刷新信号，然后输出有源输出控制信号。 帧存储器（101）接收有源输出控制信号，然后输出图像数据。 如果通过对从帧存储器（101）接收到的图像数据进行减法运算，则下行电路（106）在接收到有效的校正指示信号时进行校正，然后输出校正后的图像数据。
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Patent Agency Ranking
公开(公告)号：US20150205563A1
公开(公告)日：2015-07-23
申请号：US14421189
申请日：2013-08-21
Applicant: Sharp Kabushiki Kaisha
Inventor： Ken Inada , Asahi Yamato
CPC classification number: G06F3/1431 , G06T1/20 , G09G3/003 , G09G3/3648 , G09G2320/103 , G09G2330/02 , G09G2330/022 , H04N13/144 , H04N13/31
Abstract: In first and second display devices (10, 20) both during pause drive (intermittent drive), an instantaneous increase in consumption power is suppressed by means of a configuration to perform control such that the scanning period in one of the two display panels is inserted during the scanning-stopped period in the other display panel, namely during the drive operation (for writing into the pixel circuit) of one of the two display panels, the drive operation (for writing) of the other display panel is not performed. Accordingly, even when a limit value of a current supply capability of a battery is low, the display device can be driven, so that a battery service life is prolonged and the operable time of a portable terminal (100) at the time of driving by the battery is increased.
Abstract translation: 在暂停驱动（间歇驱动）期间的第一和第二显示装置（10,20）中，通过进行控制的结构来抑制消耗功率的瞬间增加，使得两个显示面板之一中的扫描周期被插入 在另一显示面板的扫描停止期间，即在两个显示面板之一的驱动操作（用于写入像素电路）期间，不执行另一显示面板的驱动操作（用于写入）。 因此，即使当电池的电流供应能力的极限值低时，可以驱动显示装置，使得电池使用寿命延长，并且便携式终端（100）在驾驶时的可操作时间由 电池增加。
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公开(公告)号：US09865202B2
公开(公告)日：2018-01-09
申请号：US14779682
申请日：2014-02-24
Applicant: Sharp Kabushiki Kaisha
Inventor： Fumiyuki Kobayashi , Asahi Yamato , Ken Inada
IPC: G09G3/36 , G02F1/1337 , G02F1/1343
CPC classification number: G09G3/3607 , G02F1/133707 , G02F2001/134372 , G02F2203/30 , G09G3/3614 , G09G3/3648 , G09G2300/0434 , G09G2320/0247 , G09G2320/0252 , G09G2320/041 , G09G2340/0435 , G09G2340/16
Abstract: The invention provides a liquid crystal display device capable of preventing a reduction in display quality by suppressing the occurrence of flicker during alternating-voltage drive, as well as a method for driving the same.Overshoot drive is performed during a first frame period, which is shortened to such an extent that a “positive effective area” and a “negative effective area” are approximately equal in size. The duration of the first frame period is set to be greater than or equal to a quarter of one frame period at a refresh rate of 60 Hz but less than one frame period. This renders it possible to make adjustments such that luminance is inhibited from abruptly dropping immediately after a polarity change, and also luminance is prevented from becoming excessively high due to overshoot drive, and therefore, the occurrence of flicker due to flexoelectric polarization during alternating-voltage drive can be suppressed.
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公开(公告)号：US09390686B2
公开(公告)日：2016-07-12
申请号：US14428010
申请日：2013-07-26
Applicant: Sharp Kabushiki Kaisha
Inventor： Ken Inada , Taketoshi Nakano , Akizumi Fujioka , Kazuki Takahashi
CPC classification number: G09G5/18 , G09G3/3611 , G09G3/3614 , G09G5/02 , G09G2310/0202 , G09G2310/04 , G09G2330/021
Abstract: There is provided a display device capable of suppressing brightness change which can occur at the time of image update in intermission driving. A display control circuit (20) includes a frame memory (101), a coercive refreshing determination section (104), a refreshing circuit (105), and an undershoot circuit (106). The coercive refreshing determination section (104) outputs an active coercive refreshing signal and an active correction instruction signal upon determining that an image is updated. The refreshing circuit (105) receives the active coercive refreshing signal, and then outputs an active output control signal. The frame memory (101) receives the active output control signal, and then outputs an image data. The undershoot circuit (106) performs, if in reception of the active correction instruction signal, a correction by making a subtracting operation to the image data received from the frame memory (101), and then outputs corrected image data.
Abstract translation: 提供了一种能够抑制在间歇性驾驶中图像更新时可能发生的亮度变化的显示装置。 显示控制电路（20）包括帧存储器（101），矫顽刷新判定部（104），刷新电路（105）和下冲电路（106）。 强制刷新确定部分（104）在确定图像被更新时输出主动矫顽刷新信号和主动校正指令信号。 刷新电路（105）接收主动矫顽刷新信号，然后输出有源输出控制信号。 帧存储器（101）接收有源输出控制信号，然后输出图像数据。 如果通过对从帧存储器（101）接收的图像数据进行减法运算，则下行电路（106）在接收到有效的校正指示信号时进行校正，然后输出校正后的图像数据。
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公开(公告)号：US09966024B2
公开(公告)日：2018-05-08
申请号：US14421171
申请日：2013-08-22
Applicant: Sharp Kabushiki Kaisha
Inventor： Ken Inada , Taketoshi Nakano , Asahi Yamato , Akizumi Fujioka
IPC: G09G5/10 , G09G3/36 , G02F1/1368
CPC classification number: G09G3/3614 , G02F1/1368 , G09G3/3648 , G09G3/3696 , G09G2320/0247 , G09G2320/0271 , G09G2330/021 , G09G2340/0435
Abstract: The occurrence of flicker is effectively suppressed particularly in a liquid crystal display device that performs low-frequency driving.Provided are a gradation-to-voltage value conversion table for converting a gradation to a voltage value, a correction value map for storing a correction value, and a voltage value-to-gradation conversion table for converting a voltage value to a gradation. A gradation of an input image signal is converted to a first voltage value, using the gradation-to-voltage value conversion table. The correction value specified in accordance with a location of a pixel to be processed is added to or subtracted from the first voltage value so that a second voltage value is obtained. The second voltage value is converted to an output gradation, using the voltage value-to-gradation conversion table. A driving video signal is applied to a source bus line, based on the output gradation.
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公开(公告)号：US09767742B2
公开(公告)日：2017-09-19
申请号：US15207583
申请日：2016-07-12
Applicant: Sharp Kabushiki Kaisha
Inventor： Shinji Nakagawa , Hidekazu Miyata , Hiroyuki Furukawa , Kazuyoshi Yoshiyama , Yasuhiro Yoshida , Toshihiro Yanagi , Taketoshi Nakano , Asahi Yamato , Ken Inada
IPC: G09G5/02 , G09G3/36 , G09G3/20 , G02F1/1335
CPC classification number: G09G3/3607 , G02F1/133514 , G02F2201/52 , G09G3/2003 , G09G5/02 , G09G2300/0452 , G09G2320/0242 , G09G2340/0457 , G09G2360/16
Abstract: There is provided an image display device, in which a pixel includes sub-pixels of four or more colors that include a color in addition to the three primary colors, and which can display a high-quality image in which false colors or artifacts are suppressed. The image display device includes a pixel area in which a plurality of pixels P are arranged in a matrix shape, and each of the pixels P includes m (m is an integer which is equal to or greater than 4) sub-pixels SP. When it is assumed that the colors of the m sub-pixels SP included in one pixel are C1, C2, . . . , and Cm, the m sub-pixels SP which are sequentially arrayed from an arbitrary position include all of the colors of C1, C2, . . . , and Cm in both the vertical direction and the horizontal direction in the pixel area.
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