公开(公告)号：US20140192093A1

公开(公告)日：2014-07-10

申请号：US14132034

申请日：2013-12-18

申请人： HITACHI MEDIA ELECTRONICS CO., LTD.

发明人： Fumio HARUNA ,  Yuya OGI ,  Tomoki KOBORI ,  Yoshiho SEO ,  Masayuki HATORI ,  Toshio UEDA

IPC分类号： G09G5/10

CPC分类号： G09G5/10 ,  G09G3/025 ,  G09G2320/0271 ,  G09G2320/043 ,  G09G2320/0606 ,  G09G2320/0633 ,  G09G2320/0673 ,  G09G2360/144

摘要： A laser beam display device includes: a dimming setting input unit into which any one of the dimming values of plural dimming steps are input; a first dimming processing unit having plural dimming LUTs that store dimming amounts regarding the respective dimming steps with the corresponding gradation levels as indexes; a second dimming processing unit having one gain LUT that holds gains regarding the respective dimming steps and a multiplier that creates the indexes for the respective diming LUTs by multiplying a video signal by the gains; and a light source drive unit that drives a laser diode on the basis of reference results obtained by referring to the dimming LUTs of the first dimming processing unit. The luminance of the emission beam of the laser diode, which corresponds to the video signal, is dimmed in accordance with a dimming setting input from the dimming setting input unit.

摘要翻译： 激光束显示装置包括：调光设置输入单元，其中输入多个调光步骤的任何一个调光值; 第一调光处理单元，具有多个调光LUT，其以对应的灰度级作为指标存储关于各个调光步骤的调光量; 具有一个增益LUT的第二调光处理单元，该增益LUT保持关于各个调光步骤的增益;乘法器，通过将视频信号乘以增益来创建各个调光LUT的索引; 以及光源驱动单元，其基于通过参考第一调光处理单元的调光LUT获得的参考结果来驱动激光二极管。 对应于视频信号的激光二极管的发射光束的亮度根据来自调光设置输入单元的调光设置输入而变暗。

公开(公告)号：US20140253527A1

公开(公告)日：2014-09-11

申请号：US14155558

申请日：2014-01-15

申请人： Hitachi Media Electronics Co., Ltd.

发明人： Yuya OGI ,  Yoshiho SEO ,  Fumio HARUNA ,  Toshio UEDA ,  Tomoyuki NONAKA

IPC分类号： G09G5/02

CPC分类号： G09G5/02 ,  G09G3/002 ,  G09G3/025 ,  G09G3/2081 ,  G09G2320/0238 ,  G09G2320/0242 ,  G09G2320/0247 ,  G09G2320/041 ,  G09G2320/0666 ,  G09G2320/103 ,  G09G2360/145 ,  G09G2360/16 ,  H04N9/3135

摘要： A laser projection display device includes: a laser light source drive unit; an attribute amount detection unit for detecting the attribute amount of a picture signal; a light sensor for measuring the light amounts of the laser light sources; and a temperature sensor for measuring the temperatures of the laser light sources. The laser projection display device is configured so that the current vs. light amount output characteristics of the laser light sources with a threshold current and current gain as a parameter are corrected in accordance with the load amount of the picture signal per frame if the change of the attribute amount exceeds a predefined amount; the light sources are driven at a predefined timing of the vertical blanking interval; controls the threshold currents and current gains in accordance with the light amounts; and the threshold currents and current gains are corrected on the basis of the measured temperatures.

摘要翻译： 激光投影显示装置包括：激光源驱动单元; 属性量检测单元，用于检测图像信号的属性量; 用于测量激光光源的光量的光传感器; 以及用于测量激光源的温度的温度传感器。 激光投影显示装置被配置为使得以阈值电流和电流增益作为参数的激光光源的电流对光量输出特性根据每帧的图像信号的负载量被校正 属性量超过预定义的数量; 在垂直消隐间隔的预定定时驱动光源; 根据光量控制阈值电流和电流增益; 并且基于测量的温度校正阈值电流和电流增益。

公开(公告)号：US20140285536A1

公开(公告)日：2014-09-25

申请号：US14087126

申请日：2013-11-22

申请人： HITACHI MEDIA ELECTRONICS CO., LTD.

发明人： Fumio HARUNA ,  Tsutomu KUROIWA ,  Yuya OGI

IPC分类号： G09G5/10 ,  G02B26/08

CPC分类号： G09G5/10 ,  G02B26/0816 ,  H04N9/3129 ,  H04N9/3144 ,  H04N9/3182 ,  H04N9/3194

摘要： A change in the white balance caused due to the temperature is reduced in an image display device using MEMS and a laser light source. An image processing unit of the device superposes a signal based on a first measured value of a light quantity at a first temperature on a image signal to be supplied to the laser light source. An amplification factor of the light source drive unit is changed so that a second measured value at a second temperature comes close to the first measured value at the first temperature as a target value based on the second measured value at which the light quantity of light generated at the laser light source is measured at the second temperature different from the first temperature on the signal based on the first measured value.

摘要翻译： 在使用MEMS和激光光源的图像显示装置中，由于温度引起的白平衡的变化减小。 该装置的图像处理单元将基于第一温度的光量的第一测量值的信号叠加在要提供给激光光源的图像信号上。 改变光源驱动单元的放大系数，使得第二温度下的第二测量值基于产生光量的第二测量值在第一温度下接近第一测量值作为目标值 在与基于第一测量值的信号上的第一温度不同的第二温度下测量激光源。