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1. 发明授权

US08552946B2 Display device, display driver and image display method 有权
标题翻译：显示设备，显示驱动程序和图像显示方法
公开(公告)号：US08552946B2
公开(公告)日：2013-10-08
申请号：US12108583
申请日：2008-04-24
申请人： Yoshiki Kurokawa , Yukari Katayama , Hiroki Awakura , Naoki Takada , Yasuyuki Kudo , Akihito Akai , Goki Toshima , Akihisa Aoyama , Goro Sakamaki
发明人： Yoshiki Kurokawa , Yukari Katayama , Hiroki Awakura , Naoki Takada , Yasuyuki Kudo , Akihito Akai , Goki Toshima , Akihisa Aoyama , Goro Sakamaki
IPC分类号： G09G3/36
CPC分类号： G09G3/3406 , G09G3/3611 , G09G2320/0276 , G09G2320/064 , G09G2320/0646 , G09G2320/0653 , G09G2320/066 , G09G2330/021 , G09G2360/145 , G09G2360/16
摘要： In a display device and a display driver, when a grayscale of a display image is equal to or lower than a specific grayscale value obtained from a histogram of the display image, a display grayscale is extended with a linear function. On the other hand, when a grayscale of a display image is equal to or higher than the specific grayscale value, histogram equalization of a part higher than the specific grayscale value is performed, and the display grayscale is extended with a non-linear function obtained from the histogram equalization.
摘要翻译：在显示装置和显示驱动器中，当显示图像的灰阶等于或低于从显示图像的直方图获得的特定灰度值时，以线性函数扩展显示灰度级。另一方面，当显示图像的灰阶等于或高于特定灰度值时，执行高于特定灰度值的部分的直方图均衡，并且利用获得的非线性函数来扩展显示灰度级从直方图均衡。

2. 发明申请

US20080272999A1 DISPLAY DEVICE, DISPLAY DRIVER AND IMAGE DISPLAY METHOD 有权
标题翻译：显示设备，显示驱动器和图像显示方法
公开(公告)号：US20080272999A1
公开(公告)日：2008-11-06
申请号：US12108583
申请日：2008-04-24
申请人： Yoshiki Kurokawa , Yukari Katayama , Hiroki Awakura , Naoki Takada , Yasuyuki Kudo , Akihito Akai , Goki Toshimi , Akihisa Aoyama , Goro Sakamaki
发明人： Yoshiki Kurokawa , Yukari Katayama , Hiroki Awakura , Naoki Takada , Yasuyuki Kudo , Akihito Akai , Goki Toshimi , Akihisa Aoyama , Goro Sakamaki
IPC分类号： G09G3/36
CPC分类号： G09G3/3406 , G09G3/3611 , G09G2320/0276 , G09G2320/064 , G09G2320/0646 , G09G2320/0653 , G09G2320/066 , G09G2330/021 , G09G2360/145 , G09G2360/16
摘要： In a display device and a display driver, when a grayscale of a display image is equal to or lower than a specific grayscale value obtained from a histogram of the display image, a display grayscale is extended with a linear function. On the other hand, when a grayscale of a display image is equal to or higher than the specific grayscale value, histogram equalization of a part higher than the specific grayscale value is performed, and the display grayscale is extended with a non-linear function obtained from the histogram equalization.
摘要翻译：在显示装置和显示驱动器中，当显示图像的灰阶等于或低于从显示图像的直方图获得的特定灰度值时，以线性函数扩展显示灰度级。另一方面，当显示图像的灰阶等于或高于特定灰度值时，执行高于特定灰度值的部分的直方图均衡，并且利用获得的非线性函数来扩展显示灰度级从直方图均衡。

3. 发明申请

US20080079756A1 DISPLAY DRIVER 审中-公开
标题翻译：显示驱动器
公开(公告)号：US20080079756A1
公开(公告)日：2008-04-03
申请号：US11779673
申请日：2007-07-18
申请人： Akihito Akai , Yasuyuki Kudo , Yoshiki Kurokawa , Goro Sakamaki , Hiroki Awakura , Naoki Takada
发明人： Akihito Akai , Yasuyuki Kudo , Yoshiki Kurokawa , Goro Sakamaki , Hiroki Awakura , Naoki Takada
IPC分类号： G09G5/10
CPC分类号： G09G3/3406 , G09G3/3688 , G09G2320/0261 , G09G2320/0613 , G09G2320/0626 , G09G2320/064 , G09G2320/0646 , G09G2340/145 , G09G2360/16
摘要： A liquid crystal driver of liquid crystal display device in which a plurality of expansion/contraction ratios of display data, for example, two kinds of expansion/contraction ratios can be set in a register is provided. Further, the two kinds of expansion/contraction ratios are applicable respectively in two kinds of areas (still-image and video-image) whose coordinates are previously set in a liquid crystal panel. As a result, it is possible to make the still-image area and the video-image area have different expansion/contraction ratios of pixel value respectively. In this manner, it is possible to make display brightness high only in the video-image area, thereby realizing both lower power consumption and visibility improvement at the same time.
摘要翻译：提供了一种液晶显示装置的液晶驱动器，其中可以在寄存器中设置显示数据的多个扩展/缩小比例，例如两种扩展/缩放比。此外，两种扩张/收缩率分别适用于在液晶面板中预先设定坐标的两种区域（静止图像和视频图像）。结果，可以使静止图像区域和视频图像区域分别具有不同的像素值的扩展/缩小比率。以这种方式，可以仅在视频图像区域中使显示亮度高，从而同时实现较低的功耗和可见度提高。

4. 发明申请

US20080129763A1 DISPLAY BRIGHTNESS CONTROL CIRCUIT 有权
标题翻译：显示亮度控制电路
公开(公告)号：US20080129763A1
公开(公告)日：2008-06-05
申请号：US11923970
申请日：2007-10-25
申请人： Hiroki AWAKURA , Akihito Akai , Yoshiki Kurokawa , Naoki Takada , Goro Sakamaki
发明人： Hiroki AWAKURA , Akihito Akai , Yoshiki Kurokawa , Naoki Takada , Goro Sakamaki
IPC分类号： G09G5/10
CPC分类号： G09G3/3406 , G09G3/3233 , G09G2300/0842 , G09G2320/064 , G09G2360/144
摘要： A display brightness control circuit of a liquid crystal display device includes a logarithmic-linear converting circuit for converting an illuminance signal having a logarithmic relationship with incident light into a linear signal. When an output of an external light sensor is a logarithmic signal, the logarithmic signal is converted into a linear signal through the logarithmic-linear converting circuit, and when an output of the external light sensor is a linear signal, the logarithmic-linear converting circuit is not involved. The logarithmic-linear converting circuit corresponds to an exponential circuit which is an inverse function of a logarithm log. Further, when even the same logarithmic output illuminance sensor is different in input-output characteristics, setting of the abovementioned exponential circuit can be changed.
摘要翻译：液晶显示装置的显示亮度控制电路包括对数线性转换电路，用于将具有入射光的对数关系的照度信号转换为线性信号。当外部光传感器的输出是对数信号时，通过对数线性转换电路将对数信号转换成线性信号，并且当外部光传感器的输出是线性信号时，对数线性转换电路不参与对数线性转换电路对应于作为对数日志的反函数的指数电路。此外，即使相同的对数输出照度传感器在输入输出特性上不同，也可以改变上述指数电路的设定。

5. 发明授权

US08059141B2 Display brightness control circuit 有权
标题翻译：显示亮度控制电路
公开(公告)号：US08059141B2
公开(公告)日：2011-11-15
申请号：US11923970
申请日：2007-10-25
申请人： Hiroki Awakura , Akihito Akai , Yoshiki Kurokawa , Naoki Takada , Goro Sakamaki
发明人： Hiroki Awakura , Akihito Akai , Yoshiki Kurokawa , Naoki Takada , Goro Sakamaki
IPC分类号： G09G5/10
CPC分类号： G09G3/3406 , G09G3/3233 , G09G2300/0842 , G09G2320/064 , G09G2360/144
摘要： A display brightness control circuit of a liquid crystal display device includes a logarithmic-linear converting circuit for converting an illuminance signal having a logarithmic relationship with incident light into a linear signal. When an output of an external light sensor is a logarithmic signal, the logarithmic signal is converted into a linear signal through the logarithmic-linear converting circuit, and when an output of the external light sensor is a linear signal, the logarithmic-linear converting circuit is not involved. The logarithmic-linear converting circuit corresponds to an exponential circuit which is an inverse function of a logarithm log. Further, when even the same logarithmic output illuminance sensor is different in input-output characteristics, setting of the abovementioned exponential circuit can be changed.
摘要翻译：液晶显示装置的显示亮度控制电路包括对数线性转换电路，用于将具有入射光的对数关系的照度信号转换为线性信号。当外部光传感器的输出是对数信号时，通过对数线性转换电路将对数信号转换成线性信号，并且当外部光传感器的输出是线性信号时，对数线性转换电路不参与对数线性转换电路对应于作为对数日志的反函数的指数电路。此外，即使相同的对数输出照度传感器在输入输出特性上不同，也可以改变上述指数电路的设定。

6. 发明申请

US20110242139A1 DISPLAY DRIVER 审中-公开
标题翻译：显示驱动器
公开(公告)号：US20110242139A1
公开(公告)日：2011-10-06
申请号：US12750781
申请日：2010-03-31
申请人： Goki Toshima , Yasuyuki Kudo , Yoshiki Kurokawa , Akihito Akai
发明人： Goki Toshima , Yasuyuki Kudo , Yoshiki Kurokawa , Akihito Akai
IPC分类号： G09G5/10
CPC分类号： G09G3/3406 , G09G2320/0646 , G09G2330/021 , G09G2340/02
摘要： The display driver achieves the balance between the image quality and power-cutting ratio by controlling the backlight dimming ratio to keep the image quality after backlight dimming constant. The display driver uses e.g. MSE (Mean Square Error) as an index of image quality. The reference gradation control unit controls the data decompression and backlight dimming ratios, thereby to keep the image quality after backlight dimming constant. Assuming display data decompression, and backlight dimming, the error calculating unit calculates a decrease of luminance for an input displayed image as MSE based on the decompression and dimming ratios of a preceding frame, in advance. In the case of MSE over a predetermined value, the decompression unit and light-adjustment control unit decrease the decompression and dimming ratios to below those of the preceding frame, respectively. In the case of MSE below the value, the ratios are lowered to below those of the preceding frame.
摘要翻译：显示驱动器通过控制背光调光比来实现图像质量和功率切换比之间的平衡，以在背光调光之后保持图像质量恒定。显示驱动器使用例如 MSE（均方误差）作为图像质量的指标。参考灰度控制单元控制数据解压缩和背光调光比，从而在背光调光恒定后保持图像质量。假设显示数据解压缩和背光调光，误差计算单元预先基于前一帧的解压缩和调光比来计算输入显示图像的亮度的降低为MSE。在MSE超过预定值的情况下，解压缩单元和调光控制单元分别将解压缩和调光比降低到前一帧以下。在MSE低于该值的情况下，比率降低到低于前一帧的比率。

7. 发明申请

US20090015532A1 DISPLAY DEVICE AND DRIVING CIRCUIT THEREOF 失效
标题翻译：显示设备及其驱动电路
公开(公告)号：US20090015532A1
公开(公告)日：2009-01-15
申请号：US12170518
申请日：2008-07-10
申请人： Yukari Katayama , Yoshiki Kurokawa , Akihito Akai , Goro Sakamaki
发明人： Yukari Katayama , Yoshiki Kurokawa , Akihito Akai , Goro Sakamaki
IPC分类号： G09G3/36
CPC分类号： G09G3/3611 , G09G3/3406 , G09G3/3688 , G09G3/3696 , G09G2310/027 , G09G2320/0252 , G09G2320/0271 , G09G2320/041 , G09G2320/0646 , G09G2320/0673 , G09G2340/16 , G09G2360/18
摘要： In a display device such as a liquid crystal display, a processing for compressing a range of display data (grayscale) to a low grayscale side (a grayscale range where response is fast) except for a high grayscale side (a grayscale range where response is slow) at a predetermined compression ratio to conduct display according to response characteristic of transition between grayscales and a temperature state and a processing for increasing a light amount of a backlight to compensate for luminance change due to the compression are performed, for example, in a liquid crystal panel of TN liquid crystal. Thereby, response can be made fast even at a low temperature time.
摘要翻译：在诸如液晶显示器的显示装置中，除了高灰阶侧（响应为灰度等级的灰度级范围）之外，将显示数据（灰度级）的范围压缩到低灰度级（响应快的灰度范围）慢），以根据灰阶和温度状态之间的转变的响应特性进行显示，并且例如在一个例如在一个例子中执行用于增加背光的光量以补偿由于压缩引起的亮度变化的处理 TN液晶液晶面板。因此即使在低温时也可以做出快速响应。

8. 发明授权

US08325128B2 Display device and driving circuit thereof 失效
标题翻译：显示装置及其驱动电路
公开(公告)号：US08325128B2
公开(公告)日：2012-12-04
申请号：US12170518
申请日：2008-07-10
申请人： Yukari Katayama , Yoshiki Kurokawa , Akihito Akai , Goro Sakamaki
发明人： Yukari Katayama , Yoshiki Kurokawa , Akihito Akai , Goro Sakamaki
IPC分类号： G09G3/36
CPC分类号： G09G3/3611 , G09G3/3406 , G09G3/3688 , G09G3/3696 , G09G2310/027 , G09G2320/0252 , G09G2320/0271 , G09G2320/041 , G09G2320/0646 , G09G2320/0673 , G09G2340/16 , G09G2360/18
摘要： In a display device such as a liquid crystal display, a processing for compressing a range of display data (grayscale) to a low grayscale side (a grayscale range where response is fast) except for a high grayscale side (a grayscale range where response is slow) at a predetermined compression ratio to conduct display according to response characteristic of transition between grayscales and a temperature state and a processing for increasing a light amount of a backlight to compensate for luminance change due to the compression are performed, for example, in a liquid crystal panel of TN liquid crystal. Thereby, response can be made fast even at a low temperature time.
摘要翻译：在诸如液晶显示器的显示装置中，除了高灰阶侧（响应为灰度等级的灰度级范围）之外，将显示数据（灰度级）的范围压缩到低灰度级（响应快的灰度范围）慢），以根据灰阶和温度状态之间的转变的响应特性进行显示，并且例如在一个例如在一个例子中执行用于增加背光的光量以补偿由于压缩引起的亮度变化的处理 TN液晶液晶面板。因此即使在低温时也可以做出快速响应。

9. 发明授权

US08754841B2 Display driver 有权
标题翻译：显示驱动程序
公开(公告)号：US08754841B2
公开(公告)日：2014-06-17
申请号：US13734144
申请日：2013-01-04
申请人： Naoki Takada , Yasuyuki Kudo , Yoshiki Kurokawa , Goro Sakamaki
发明人： Naoki Takada , Yasuyuki Kudo , Yoshiki Kurokawa , Goro Sakamaki
IPC分类号： G09G3/34 , G02F1/13357
CPC分类号： G09G3/3413 , G09G3/3406 , G09G5/10 , G09G2320/064 , G09G2320/0646 , G09G2320/0653 , G09G2330/021 , G09G2360/144 , G09G2360/16
摘要： In a display driver, a first backlight control unit using a histogram and a second backlight control unit using an optical sensor can be used in combination. The display driver includes a PWM generating unit setting a control signal value consisting of a product of a luminance rate of X % and a luminance rate of Y % as a luminance rate of a control signal for controlling a backlight with respect to maximum backlight luminance when a luminance rate of a control signal obtained by first backlight control with respect to the maximum backlight luminance is X % and a luminance rate of a control signal obtained by second backlight control with respect to the maximum backlight luminance is Y %.
摘要翻译：在显示驱动器中，可以组合使用使用直方图的第一背光控制单元和使用光学传感器的第二背光控制单元。显示驱动器包括PWM生成单元，其将由X％的亮度率和Y％的亮度率的乘积构成的控制信号值作为用于控制背光源的控制信号的亮度率相对于最大背光亮度而设置，通过相对于最大背光亮度的第一背光控制获得的控制信号的亮度率为X％，并且通过相对于最大背光亮度的第二背光控制获得的控制信号的亮度率为Y％。

10. 发明申请

US20110242120A1 DISPLAY APPARATUS AND DRIVIING DEVICE FOR DISPLAYING 审中-公开
标题翻译：用于显示的显示装置和驱动装置
公开(公告)号：US20110242120A1
公开(公告)日：2011-10-06
申请号：US12750773
申请日：2010-03-31
申请人： Akihito AKAI , Yoshiki Kurokawa , Goki Toshima
发明人： Akihito AKAI , Yoshiki Kurokawa , Goki Toshima
IPC分类号： G06F13/00
CPC分类号： G09G3/3406 , G09G2320/0646 , G09G2360/16
摘要： The display unit can reduce the electric power consumed by the process of calculating an adjustment coefficient for display data, as typified by gradient control, and it can be readily adapted even to a display panel with a higher resolution. The display unit includes: a plurality of driving units arrayed in parallel and each operable to output a drive signal to a display panel; a plurality of first calculation units, and a plurality of display RAMs, each paired with one first calculation unit, the pairs of the first calculation units and display RAMs laid out along a direction of the parallel array of the driving units; and a second calculation unit which distributes display data supplied from outside to the display RAMs, receives display data from the display RAMs in parallel to analyze a histogram of tone distribution of pixel data corresponding to one screen, and calculates the adjustment coefficient based on a result of the analysis. In the display unit, the adjustment coefficient thus calculated is sent back to the first calculation units. The first calculation unit performs a calculation using display data read from the corresponding display RAM and the adjustment coefficient thereby to create drive data for the display panel.
摘要翻译：显示单元可以通过梯度控制代表的计算显示数据的调整系数的处理来减少消耗的电力，并且可以容易地适应于具有更高分辨率的显示面板。显示单元包括：并行排列的多个驱动单元，每个驱动单元可操作以将驱动信号输出到显示面板; 多个第一计算单元和多个显示RAM，每个显示RAM与一个第一计算单元配对，沿着驱动单元的并行阵列的方向布置的第一计算单元和显示RAM对; 以及第二计算单元，其将从外部提供的显示数据分配到显示RAM，并行地从显示RAM接收显示数据，以分析与一个屏幕相对应的像素数据的色调分布的直方图，并且基于结果计算调整系数的分析。在显示单元中，将如此计算的调整系数发送回第一计算单元。第一计算单元使用从对应的显示RAM读取的显示数据和调整系数进行计算，从而创建显示面板的驱动数据。

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