公开(公告)号：US20100079479A1

公开(公告)日：2010-04-01

申请号：US12468345

申请日：2009-05-19

申请人： Yoshiki KUROKAWA ,  Yasuyuki KUDO ,  Hiroyuki NITTA ,  Kazuki HOMMA ,  Junya TAKEDA

发明人： Yoshiki KUROKAWA ,  Yasuyuki KUDO ,  Hiroyuki NITTA ,  Kazuki HOMMA ,  Junya TAKEDA

IPC分类号： G09G5/02 ,  G09G5/10 ,  G09G3/36

CPC分类号： G09G1/002 ,  G09G3/3655 ,  G09G5/04 ,  G09G5/06 ,  G09G2320/0242 ,  G09G2340/145

摘要： A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.

摘要翻译： 本发明的显示驱动电路具有：能够存储初始色域顶点坐标的初始色域 - 顶点坐标存储单元; 能够存储用户目标色域顶点坐标的用户对象色彩 - 顶点坐标存储单元; 饱和扩张系数决定单元，用于基于初始和用户目标色域顶点坐标来确定饱和度数据的扩展系数; 以及用于基于饱和度膨胀系数扩大显示数据的饱和度的扩展单元。 基于初始和用户目标色域顶点坐标来确定饱和度数据的扩展系数，根据扩展系数扩展显示数据的饱和度。 因此，可以对于每个色域或LC显示面板的R，G和B颜色属性中的每一个来控制饱和度的扩大程度。

公开(公告)号：US20090289965A1

公开(公告)日：2009-11-26

申请号：US12467648

申请日：2009-05-18

申请人： Yoshiki KUROKAWA ,  Yukari KATAYAMA ,  Yasuyuki KUDO ,  Akihito AKAI ,  Hiroyuki NITTA ,  Kazuki HOMMA

发明人： Yoshiki KUROKAWA ,  Yukari KATAYAMA ,  Yasuyuki KUDO ,  Akihito AKAI ,  Hiroyuki NITTA ,  Kazuki HOMMA

IPC分类号： G09G3/36 ,  G09G5/10

CPC分类号： G09G3/3406 ,  B60K2370/33 ,  B60K2370/42 ,  G09G3/2092 ,  G09G3/3413 ,  G09G5/363 ,  G09G2320/0238 ,  G09G2320/041 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2320/0673 ,  G09G2360/145

摘要： A liquid crystal driving device is provided, which can reduce the problem of contrast lowering of the liquid crystal display screen due to the decrease of the driving current of LED, by the control which is performed in order to cope with the decrease of the maximum rated current of LED as a light source of the backlight at a high temperature. The liquid crystal driving device includes a liquid crystal driving circuit, a backlight control unit, and display data expansion circuits. The liquid crystal driving circuit generates a liquid crystal driving signal to be supplied to a liquid crystal display panel in response to display data. The backlight control unit reduces driving current of the light emitting diode as a light source of the backlight module to illuminate the liquid crystal display panel, in response to the temperature rise of the liquid crystal display panel. The display data expansion circuit, in response to the temperature rise of the liquid crystal display panel, performs the data expansion of the display data, and compensates the contrast lowering of the liquid crystal display panel due to the dimming of the backlight module with the temperature rise of the liquid crystal display panel.

摘要翻译： 提供一种液晶驱动装置，通过进行控制，可以减少由于LED的驱动电流的降低导致的液晶显示屏的对比度下降的问题，以便应对最大额定值的降低 LED作为高温背光源的电流。 液晶驱动装置包括液晶驱动电路，背光控制单元和显示数据扩展电路。 液晶驱动电路根据显示数据产生供给液晶显示面板的液晶驱动信号。 背光控制单元响应于液晶显示面板的温度升高，降低作为背光模块的光源的发光二极管的驱动电流，以照亮液晶显示面板。 显示数据扩展电路响应于液晶显示面板的温度升高，执行显示数据的数据扩展，并补偿由于背光模块的温度随温度而变暗的液晶显示面板的对比度降低 上升的液晶显示面板。

公开(公告)号：US20090303264A1

公开(公告)日：2009-12-10

申请号：US12470526

申请日：2009-05-22

申请人： Goki TOSHIMA ,  Yasuyuki KUDO ,  Yoshiki KUROKAWA ,  Akihito AKAI ,  Kazuki HOMMA

发明人： Goki TOSHIMA ,  Yasuyuki KUDO ,  Yoshiki KUROKAWA ,  Akihito AKAI ,  Kazuki HOMMA

IPC分类号： G09G5/10

CPC分类号： G09G3/3648 ,  G09G3/3406 ,  G09G2320/0242 ,  G09G2320/0271 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2330/021 ,  G09G2360/16

摘要： A liquid crystal driving device includes a liquid crystal controller and specific color expansion circuits. The liquid crystal controller generates a liquid crystal drive signal to be supplied to a liquid crystal display panel in response to display data. The specific color expansion circuits generate an image output signal from a low-intensity image input signal corresponding to a specific color by intensifying a gradation using a specified factor. The specific color expansion circuits generate an image output signal from a high-intensity image input signal corresponding to a specific color by intensifying a gradation using another small factor. The image output signal is appropriately intensified by the specific color expansion circuits and is supplied as display data to the liquid crystal controller.

摘要翻译： 液晶驱动装置包括液晶控制器和特定颜色扩展电路。 液晶控制器根据显示数据产生供应给液晶显示面板的液晶驱动信号。 特定颜色扩展电路通过使用规定的因子增强灰度，从与特定颜色相对应的低强度图像输入信号生成图像输出信号。 特定颜色扩展电路通过使用另一小因素强化灰度，从与特定颜色对应的高强度图像输入信号生成图像输出信号。 图像输出信号由特定的色彩扩展电路适当增强，并作为显示数据提供给液晶控制器。

公开(公告)号：US20080316167A1

公开(公告)日：2008-12-25

申请号：US12134726

申请日：2008-06-06

申请人： Yoshiki KUROKAWA ,  Yukari Katayama ,  Yasuyuki Kudo ,  Akihito Akai ,  Goki Toshima ,  Akihisa Aoyama

发明人： Yoshiki KUROKAWA ,  Yukari Katayama ,  Yasuyuki Kudo ,  Akihito Akai ,  Goki Toshima ,  Akihisa Aoyama

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G3/3611 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2330/021 ,  G09G2360/16

摘要： A display driver driving a display panel according to inputted display data comprises: a first circuit changing brightness of a display image by conversion of the display data based on a first reference value and a second reference value, the first reference value being a display data value at a first position in an upper part of a histogram of the inputted display data, and the second reference value being a display data value at a second position in a lower portion of the histogram; a second circuit changing brightness of a illuminating device illuminating the display panel based on the first reference value; and a control circuit performing a processing of making the brightness of the display image high by the first circuit and a processing of making the brightness of the illuminating device low by the second circuit in correlation with the brightness of the display image.

摘要翻译： 根据输入的显示数据驱动显示面板的显示驱动器包括：第一电路，通过基于第一参考值和第二参考值转换显示数据来改变显示图像的亮度，第一参考值是显示数据值 在输入的显示数据的直方图的上部的第一位置处，并且第二参考值是在直方图的下部的第二位置处的显示数据值; 基于第一参考值改变照明显示面板的照明装置的亮度的第二电路; 以及控制电路，执行通过第一电路使显示图像的亮度变高的处理，以及通过与显示图像的亮度相关地将第二电路的照明装置的亮度降低的处理。

公开(公告)号：US20130120480A1

公开(公告)日：2013-05-16

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： G09G5/10

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％。

公开(公告)号：US20080136844A1

公开(公告)日：2008-06-12

申请号：US11943199

申请日：2007-11-20

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： G09G5/10

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％。

公开(公告)号：US20130044146A1

公开(公告)日：2013-02-21

申请号：US13647710

申请日：2012-10-09

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： G09G5/10 ,  G09G5/00

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，并且通过获得的非线性函数来扩展显示灰度级 从直方图均衡。

公开(公告)号：US20100295872A1

公开(公告)日：2010-11-25

申请号：US12780915

申请日：2010-05-16

申请人： Yusuke UCHIDA ,  Yukari KATAYAMA ,  Akihito AKAI ,  Yoshiki KUROKAWA

发明人： Yusuke UCHIDA ,  Yukari KATAYAMA ,  Akihito AKAI ,  Yoshiki KUROKAWA

IPC分类号： G09G5/00 ,  G09G3/36 ,  G06T9/00

CPC分类号： G09G3/3611 ,  G09G2320/0252 ,  G09G2320/0261 ,  G09G2340/16 ,  G09G2354/00

摘要： The present invention is directed to improve efficiency in use of a memory for storing display data which is used for an overdrive process. A display driver for driving a display device compresses image display data, stores the compressed data into a memory, and generates a preceding frame by decompressing the data read from the memory. A setting unit divides a display screen of the display device into, for example, a first region as a center part and a second region as a peripheral part. An overdrive computing unit generates overdrive display data in response to a present-time frame and the preceding frame, compresses the image display data in the first and second regions at first and second data compression ratios of small and large values, respectively, and stores the compressed data into the memory. By saving the space of the memory, the picture quality in the first region is improved.

摘要翻译： 本发明旨在提高用于存储用于过驱动过程的显示数据的存储器的使用效率。 用于驱动显示装置的显示驱动器压缩图像显示数据，将压缩数据存储到存储器中，并且通过解压缩从存储器读取的数据来生成前一帧。 设置单元将显示设备的显示屏划分为例如作为中心部分的第一区域和作为周边部分的第二区域。 过驱动计算单元响应于当前帧和前一帧产生过驱动显示数据，分别以小值和大值的第一和第二数据压缩比压缩第一和第二区域中的图像显示数据，并存储 将数据压缩到内存中。 通过节省存储器的空间，改善了第一区域中的图像质量。

公开(公告)号：US20100082298A1

公开(公告)日：2010-04-01

申请号：US12566257

申请日：2009-09-24

申请人： Yoshiki KUROKAWA

发明人： Yoshiki KUROKAWA

IPC分类号： G01M15/10

CPC分类号： F02D41/222 ,  F01N2550/00 ,  F01N2560/08 ,  F02D41/0055 ,  F02D41/1448 ,  F02D2200/703 ,  F02M26/05 ,  F02M26/47 ,  F02M26/49 ,  Y02T10/40

摘要： A failure diagnosis apparatus for an exhaust pressure sensor for detecting the exhaust pressure in an exhaust gas recirculation passage which connects an exhaust passage and an intake passage of an internal combustion engine. A first preliminary determination that the exhaust pressure sensor is normal, is made when the engine is in a predetermined low load operating condition and a difference between the detected exhaust pressure and the atmospheric pressure is equal to or less than a first determination threshold value. A second preliminary determination that the exhaust pressure sensor is normal, is made when the engine is in a predetermined high load operating condition and the difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure is equal to or greater than a second determination threshold value. A final determination that the exhaust pressure sensor is normal, is made when both of the first and second preliminary determinations are made.

摘要翻译： 一种用于检测连接内燃机的排气通道和进气通道的排气再循环通道中的排气压力的排气压力传感器故障诊断装置。 当发动机处于预定的低负荷运行状态并且检测到的排气压力和大气压力之间的差值等于或小于第一确定阈值时，进行排气压力传感器正常的第一初步判定。 当发动机处于预定的高负荷运行状态并且由排气压力传感器检测到的排气压力与大气压之间的差异等于或大于第二个时，进行排气压力传感器正常的第二初步判定 确定阈值。 排气压力传感器正常的最终确定是在进行第一和第二初步测定时进行的。