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：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。