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1.发明申请LIGHT EMITTING DEVICE FOR IMAGE DISPLAY, DISPLAY DEVICE AND TELEVISION RECEIVER 审中-公开用于图像显示，显示设备和电视接收器的发光装置公开(公告)号：US20110181793A1
公开(公告)日：2011-07-28
申请号：US12737949
申请日：2009-08-11
CPC分类号： G09G3/342 , G09G2320/064 , G09G2330/021 , G09G2360/16
摘要： A light emitting device for image display includes an LED current setting circuit and an LED voltage setting circuit. In at least one embodiment, the LED current setting circuit generates a current control signal to vary an element current flowing in the LED element depending on an image display mode. The LED voltage setting circuit generates a voltage control signal to vary driving voltage driving the LED element depending on the image display mode. The light emitting device further includes a voltage generation circuit that generates the driving voltage according to the voltage control signal and the driving voltage to the LED element.
摘要翻译： 用于图像显示的发光装置包括LED电流设定电路和LED电压设定电路。 在至少一个实施例中，LED电流设置电路根据图像显示模式产生电流控制信号以改变在LED元件中流动的元件电流。 LED电压设定电路产生电压控制信号，以根据图像显示模式改变驱动LED元件的驱动电压。 发光装置还包括电压产生电路，其根据电压控制信号和对LED元件的驱动电压产生驱动电压。
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公开(公告)号：US20150009249A1
公开(公告)日：2015-01-08
申请号：US14382068
申请日：2012-09-06
申请人： Yohei Kudo , Kohji Iwasaki
发明人： Yohei Kudo , Kohji Iwasaki
CPC分类号： G09G3/3406 , G02F1/133603 , G02F2001/133601 , G02F2203/30 , G06T5/008 , G09G3/3426 , G09G3/36 , G09G2320/062 , G09G2320/0646 , G09G2320/066 , G09G2330/021 , G09G2340/125 , G09G2360/16 , H04N5/202 , H04N5/57 , H04N5/66 , H04N5/7408 , H04N21/4436
摘要： Provided is a video display device wherein a light emission luminance control is performed in accordance with a video signal corresponding to each of a plurality of divisional areas of a backlight. In the video display device: while power limiting control is being performed, the contrast can be improved and further the feeling of brightness for a high-luminance video can be increased; and even when an OSD image is displayed, display quality can be prevented from being degraded. A backlight control portion of the video display device defines a first luminance of LED for each divisional areas according to a first feature amount for a video indicated by a video signal after synthesizing of an OSD signal to be displayed in a display area corresponding to the divisional area, and controls the LED light emission by uniformly multiplying the first luminance by constant scale factor in a range where a total value of the LED drive current is equal to or less than a predetermined allowable current value. An OSD output portion (2) determines and outputs the OSD signal by use of gray scale data that is associated with a second feature amount of the video indicated by an input video signal to be displayed in a display area of the OSD image (or by an input video signal to be displayed in a display area corresponding to the divisional area including the display area of the OSD image).
摘要翻译： 提供了一种视频显示装置，其中根据与背光的多个分割区域中的每一个相对应的视频信号执行发光亮度控制。 在视频显示装置中：当进行功率限制控制时，能够提高对比度，进一步提高高亮度视频的亮度感; 并且即使当显示OSD图像时，也可以防止显示质量下降。 视频显示装置的背光控制部分根据视频信号指示的视频的第一特征量，针对每个分区区域的LED定义第一亮度，合成要显示在与分区对应的显示区域中的OSD信号 并且通过在LED驱动电流的总值等于或小于预定的容许电流值的范围内将第一亮度均匀地乘以恒定比例因子来控制LED发光。 OSD输出部分（2）通过使用与由输入视频信号指示的视频的第二特征量相关联的灰度数据来确定并输出OSD信号，以显示在OSD图像的显示区域中（或由 要显示在与包括OSD图像的显示区域的分区相对应的显示区域中的输入视频信号）。
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公开(公告)号：US08797253B2
公开(公告)日：2014-08-05
申请号：US13382857
申请日：2010-07-06
申请人： Kohji Iwasaki , Motoyuki Oniki
发明人： Kohji Iwasaki , Motoyuki Oniki
IPC分类号： G09G3/36
CPC分类号： G09G3/3406 , G02F2001/133613 , G09G2320/0633 , G09G2320/064
摘要： In an LCD device, picture quality luminance is controlled through the combination of pulse-width modulation (PWM) system and current value control system, reducing the electrical power consumption associated with turning on an LED. In the LED backlight, the light emitting luminance of the LED is controlled by both PWM and also by current value control, which selects the value of the current supplied to the LED from a plurality of set values. At least one of the plurality of set values is a predetermined current value at which duty reaches a maximum value at the maximum luminance value used in a specified picture quality mode of the picture quality modes established in the liquid crystal display device. In the aforementioned specified picture quality mode, the greatest luminance value to be used is smaller than at least the greatest luminance value used in other specified picture quality modes.
摘要翻译： 在LCD装置中，通过脉冲宽度调制（PWM）系统和电流值控制系统的组合来控制图像质量亮度，从而降低与打开LED相关的电力消耗。 在LED背光源中，LED的发光亮度由PWM和电流值控制来控制，电流值控制从多个设定值中选择提供给LED的电流值。 多个设定值中的至少一个是在液晶显示装置中建立的图像质量模式的指定图像质量模式中使用的最大亮度值下的占空比达到最大值的预定电流值。 在上述指定的图像质量模式中，要使用的最大亮度值至少小于其他指定图像质量模式中使用的最大亮度值。
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公开(公告)号：US20120105515A1
公开(公告)日：2012-05-03
申请号：US13382857
申请日：2010-07-06
申请人： Kohji Iwasaki , Motoyuki Oniki
发明人： Kohji Iwasaki , Motoyuki Oniki
CPC分类号： G09G3/3406 , G02F2001/133613 , G09G2320/0633 , G09G2320/064
摘要： In an LCD device, picture quality luminance is controlled through the combination of pulse-width modulation (PWM) system and current value control system, reducing the electrical power consumption associated with turning on an LED. In the LED backlight, the light emitting luminance of the LED is controlled by both PWM and also by current value control, which selects the value of the current supplied to the LED from a plurality of set values. At least one of the plurality of set values is a predetermined current value at which duty reaches a maximum value at the maximum luminance value used in a specified picture quality mode of the picture quality modes established in the liquid crystal display device. In the aforementioned specified picture quality mode, the greatest luminance value to be used is smaller than at least the greatest luminance value used in other specified picture quality modes.
摘要翻译： 在LCD装置中，通过脉冲宽度调制（PWM）系统和电流值控制系统的组合来控制图像质量亮度，从而降低与打开LED相关的电力消耗。 在LED背光源中，LED的发光亮度由PWM和电流值控制来控制，电流值控制从多个设定值中选择提供给LED的电流值。 多个设定值中的至少一个是在液晶显示装置中建立的图像质量模式的指定图像质量模式中使用的最大亮度值下的占空比达到最大值的预定电流值。 在上述指定的图像质量模式中，要使用的最大亮度值至少小于其他指定图像质量模式中使用的最大亮度值。
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