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：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：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：US20100302287A1

公开(公告)日：2010-12-02

申请号：US12785982

申请日：2010-05-24

申请人： Yukari KATAYAMA ,  Akihito Akai ,  Yoshiki Kurokawa ,  Yusuke Uchida

发明人： Yukari KATAYAMA ,  Akihito Akai ,  Yoshiki Kurokawa ,  Yusuke Uchida

IPC分类号： G09G5/10 ,  G09G5/00

CPC分类号： G09G3/3648 ,  G09G2310/027 ,  G09G2320/0252 ,  G09G2320/0261 ,  G09G2320/041 ,  G09G2340/16

摘要： Overdrive over multiple frames is made more efficient in a display device drive circuit that drives a display device so slow in response that target brightness is not reached even after overdrive is performed for one frame. When a display gray scale is changed from a first gray scale to a second gray scale, a display driving device varies overdrive driving voltage according to the number of frames since the point of time of the change. This makes it possible to obtain high-speed luminance response. When the number of frames for which an identical image is continuously displayed is known beforehand, the number of frames is set in a display pattern setting register and a function of detecting timing of a change of images is provided. This enables efficient overdrive. At low temperature, further, a display image is updated once for several frames according to temperature information. This enhances the visibility of the image.

摘要翻译： 在显示设备驱动电路中，即使在一帧执行过驱动之后，在显示设备驱动电路中对驱动显示设备如此慢的响应也不会达到目标亮度，因此在多个帧上进行过载。 当显示灰度级从第一灰度级变为第二灰度级时，显示驱动装置根据从改变的时间点开始的帧数来改变过驱动驱动电压。 这使得可以获得高速亮度响应。 当预先知道连续显示相同图像的帧数时，在显示模式设置寄存器中设置帧数，并且提供检测图像改变定时的功能。 这样可以实现高效的超速运行。 此外，在低温下，显示图像根据温度信息更新一次数帧。 这增强了图像的可视性。

公开(公告)号：US20110242112A1

公开(公告)日：2011-10-06

申请号：US12750794

申请日：2010-03-31

申请人： Yukari KATAYAMA ,  Akihito Akai ,  Yoshiki Kurokawa ,  Takashi Shoji

发明人： Yukari KATAYAMA ,  Akihito Akai ,  Yoshiki Kurokawa ,  Takashi Shoji

IPC分类号： G06T1/00 ,  G06T9/00

CPC分类号： G09G5/36 ,  G09G2340/02 ,  G09G2360/18 ,  H04N19/115 ,  H04N19/154 ,  H04N19/17 ,  H04N19/196 ,  H04N19/198

摘要： The display driver includes: a display data compression circuit; a recording circuit; a display data decompression circuit; and an output circuit. Further, the display driver is provided with a compressibility setting circuit. The display data compression circuit has the function of compressing the display data according to a compressibility set by the compressibility setting circuit. With the display driver arranged like this, the power consumption can be reduced by increasing the compressibility for a displayed image such that the image quality is not noticeably deteriorated even with the compressibility increased. Further, for the displayed image such that the image quality is noticeably deteriorated with the compressibility increased, a sufficient image quality after data decompression can be secured by lowering the compressibility.

摘要翻译： 显示驱动器包括：显示数据压缩电路; 记录电路; 显示数据解压缩电路; 和输出电路。 此外，显示驱动器设置有压缩性设定电路。 显示数据压缩电路具有根据由压缩性设定电路设定的压缩率压缩显示数据的功能。 通过这样布置的显示驱动器，可以通过增加显示图像的压缩率来降低功耗，使得即使压缩率增加，图像质量也不会显着劣化。 此外，对于所显示的图像，使得图像质量在可压缩性增加时显着劣化，可以通过降低压缩性来确保数据解压缩之后的足够的图像质量。