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公开(公告)号：US08259237B2
公开(公告)日：2012-09-04
申请号：US12491790
申请日：2009-06-25
申请人： Ken Nishioka , Atsuya Hirano , Kenji Nagashima , Manabu Murayama
发明人： Ken Nishioka , Atsuya Hirano , Kenji Nagashima , Manabu Murayama
IPC分类号： H04N5/64
CPC分类号： G09G3/02 , G09G2320/0233 , H04N9/3129
摘要： A detection surface of an optical detector is divided into regions C, E, F, G, and H. The optical detector outputs detection signals corresponding to the amounts of light incident on the respective regions. A position detection controller calculates an image projection position based on timing at which a laser beam is incident on region C. A laser control circuit adjusts the intensity of the laser beam emitted by a laser based on laser beam intensities detected in regions E to H arranged around region C.
摘要翻译： 光检测器的检测面被分为区域C，E，F，G和H.光检测器输出与入射在各个区域上的光量对应的检测信号。 位置检测控制器基于激光束入射到区域C的定时来计算图像投影位置。激光控制电路基于在区域E至H中检测到的激光束强度来调整由激光发射的激光束的强度 周边地区C.
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公开(公告)号：US20100002152A1
公开(公告)日：2010-01-07
申请号：US12491790
申请日：2009-06-25
申请人： Ken Nishioka , Atsuya Hirano , Kenji Nagashima , Manabu Murayama
发明人： Ken Nishioka , Atsuya Hirano , Kenji Nagashima , Manabu Murayama
IPC分类号： H04N5/64
CPC分类号： G09G3/02 , G09G2320/0233 , H04N9/3129
摘要： A detection surface of an optical detector is divided into regions C, E, F, G, and H. The optical detector outputs detection signals corresponding to the amounts of light incident on the respective regions. A position detection controller calculates an image projection position based on timing at which a laser beam is incident on region C. A laser control circuit adjusts the intensity of the laser beam emitted by a laser based on laser beam intensities detected in regions E to H arranged around region C.
摘要翻译： 光检测器的检测面被分为区域C，E，F，G和H.光检测器输出与入射在各个区域上的光量对应的检测信号。 位置检测控制器基于激光束入射到区域C的定时来计算图像投影位置。激光控制电路基于在区域E至H中检测到的激光束强度来调整由激光发射的激光束的强度 周边地区C.
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3.发明申请公开(公告)号：US20100265278A1
公开(公告)日：2010-10-21
申请号：US12762716
申请日：2010-04-19
IPC分类号： G09G5/10
CPC分类号： H04N9/3135 , H01S5/042 , H04N9/3155 , H04N9/3182
摘要： An image display apparatus wherein reduction in contrast or resolution is prevented is provided. A laser projector as an embodiment of the image display apparatus includes a memory storing a threshold value predetermined for changing a driving mode of a laser light source, a calculator for calculating an optical power level for projecting an image, a driving-mode selector selecting a mode for driving the laser light source, a driving controller for sending a signal to the laser light source in accordance with a selected driving mode, and a laser emitter. The laser projector operates at least at a bias current value Ib or more. In this case, when the optical power level is lower than or equal to a predetermined threshold value TH, the laser projector emits pulsed light. When the optical power level based on a video signal exceeds threshold value TH, the laser projector changes the driving mode of laser light emission from pulsed light emission to DC light emission, to supply a current higher than or equal to bias current value Ib to each laser light source.
摘要翻译： 提供了防止对比度或分辨率降低的图像显示装置。 作为图像显示装置的实施例的激光投影仪包括存储预定用于改变激光光源的驱动模式的阈值的存储器，用于计算用于投影图像的光功率电平的计算器，驱动模式选择器选择 用于驱动激光源的模式，用于根据选择的驱动模式向激光光源发送信号的驱动控制器和激光发射器。 激光投影仪至少工作在偏置电流值Ib或更大。 在这种情况下，当光功率水平低于或等于预定阈值TH时，激光投影仪发射脉冲光。 当基于视频信号的光功率电平超过阈值TH时，激光投影仪将激光发射的驱动模式从脉冲发光改变为DC发光，以将电流高于或等于偏置电流值Ib提供给每个 激光光源。
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公开(公告)号：US07953132B2
公开(公告)日：2011-05-31
申请号：US12555256
申请日：2009-09-08
IPC分类号： H01S3/00
CPC分类号： H01S5/042 , H01S5/0428 , H04N9/3129 , H04N9/3155
摘要： A laser driver circuit comprising a current supply circuit for supplying a laser diode with a current is provided. The current supply circuit comprises a voltage-to-current converter circuit, a current output line for outputting the current generated by the voltage-to-current converter circuit, a current supply line connected to the laser diode, a ground line connected to the ground, and a current path switch for selectively connecting either the current supply line or the ground line to the current output line. The laser driver circuit further comprises a current output prevention circuit for preventing the voltage-to-current converter circuit from generating the current by disconnecting the voltage input line using a voltage input switch so that the voltage is not input to the voltage-to-current converter circuit, when the current output line and the ground line are connected by the current path switch.
摘要翻译： 提供了一种包括用于向激光二极管提供电流的电流供应电路的激光驱动器电路。 电流供应电路包括电压 - 电流转换器电路，用于输出由电压 - 电流转换器电路产生的电流的电流输出线，连接到激光二极管的电流线，连接到地的接地线 以及用于选择性地将电流供给线或接地线连接到电流输出线的电流路径开关。 激光驱动器电路还包括电流输出防止电路，用于通过使用电压输入开关断开电压输入线来防止电压 - 电流转换器电路产生电流，使得电压未被输入到电压 - 电流 转换器电路，当电流输出线和接地线由电流路径开关连接时。
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公开(公告)号：US20100061413A1
公开(公告)日：2010-03-11
申请号：US12555256
申请日：2009-09-08
IPC分类号： H01S3/00
CPC分类号： H01S5/042 , H01S5/0428 , H04N9/3129 , H04N9/3155
摘要： A laser driver circuit comprising a current supply circuit for supplying a laser diode with a current is provided. The current supply circuit comprises a voltage-to-current converter circuit, a current output line for outputting the current generated by the voltage-to-current converter circuit, a current supply line connected to the laser diode, a ground line connected to the ground, and a current path switch for selectively connecting either the current supply line or the ground line to the current output line. The laser driver circuit further comprises a current output prevention circuit for preventing the voltage-to-current converter circuit from generating the current by disconnecting the voltage input line using a voltage input switch so that the voltage is not input to the voltage-to-current converter circuit, when the current output line and the ground line are connected by the current path switch.
摘要翻译： 提供了一种包括用于向激光二极管提供电流的电流供应电路的激光驱动器电路。 电流供应电路包括电压 - 电流转换器电路，用于输出由电压 - 电流转换器电路产生的电流的电流输出线，连接到激光二极管的电流线，连接到地的接地线 以及用于选择性地将电流供给线或接地线连接到电流输出线的电流路径开关。 激光驱动器电路还包括电流输出防止电路，用于通过使用电压输入开关断开电压输入线来防止电压 - 电流转换器电路产生电流，使得电压未被输入到电压 - 电流 转换器电路，当电流输出线和接地线由电流路径开关连接时。
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公开(公告)号：US09791711B2
公开(公告)日：2017-10-17
申请号：US13811476
申请日：2011-07-11
CPC分类号： G02B27/48 , G03B21/2033 , G03B33/06 , G03B33/12 , G09G3/02 , G09G2360/145 , H01S5/005 , H01S5/4093 , H04N9/3129 , H04N9/3167
摘要： To prevent effectively the flickering of an image due to the switching of a polarization direction while reducing speckle noise. A polarization switching unit is provided in an optical path of laser light to a projection surface A and periodically switches a polarization direction of the laser light emitted therefrom between p and S polarization. A laser control unit controls laser light sources in synchronization with the switching by the polarization switching unit and determines a driving current corresponding to a grayscale to be displayed on the basis of driving current characteristics for P polarization when the polarization direction of the laser light is the P polarization. In addition, the laser control unit determines the driving current corresponding to the grayscale to be displayed on the basis of the driving current characteristics for P polarization when the polarization direction of the laser light is the S polarization.
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公开(公告)号：US20130120714A1
公开(公告)日：2013-05-16
申请号：US13811476
申请日：2011-07-11
IPC分类号： G02B27/48
CPC分类号： G02B27/48 , G03B21/2033 , G03B33/06 , G03B33/12 , G09G3/02 , G09G2360/145 , H01S5/005 , H01S5/4093 , H04N9/3129 , H04N9/3167
摘要： To prevent effectively the flickering of an image due to the switching of a polarization direction while reducing speckle noise. A polarization switching unit is provided in an optical path of laser light to a projection surface A and periodically switches a polarization direction of the laser light emitted therefrom between p and S polarization. A laser control unit controls laser light sources in synchronization with the switching by the polarization switching unit and determines a driving current corresponding to a grayscale to be displayed on the basis of driving current characteristics for P polarization when the polarization direction of the laser light is the P polarization. In addition, the laser control unit determines the driving current corresponding to the grayscale to be displayed on the basis of the driving current characteristics for P polarization when the polarization direction of the laser light is the S polarization.
摘要翻译： 为了有效地防止由于偏振方向的切换而导致的图像的闪烁，同时减少散斑噪声。 在激光的光路中将偏振切换单元设置到投影面A，并且在p和S偏振之间周期性地切换从其发射的激光的偏振方向。 激光控制单元与偏振切换单元的切换同步地控制激光光源，并根据激光的偏振方向为P偏振时的P偏振的驱动电流特性，确定与要显示的灰度对应的驱动电流 P极化。 此外，当激光的偏振方向为S偏振时，激光控制单元基于用于P偏振的驱动电流特性来确定与要显示的灰度对应的驱动电流。
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公开(公告)号：US09069184B2
公开(公告)日：2015-06-30
申请号：US13635554
申请日：2011-03-07
CPC分类号： G02B27/48 , G02B26/10 , G09G3/002 , G09G3/02 , G09G2320/0233
摘要： Disclosed is a display device capable of inhibiting a projected picture from occurrence of brightness unevenness while reducing speckle noise. The display device (100) includes a control portion (15) continuously supplying current to a laser beam generation portion (12, 13, 14) nonstop for a period longer than a first period thereby controlling the laser beam generation portion to output the laser beam and controlling the laser beam generation portion to stop the output of the laser beam at least once in a second period scanning one image forming element (1, 2).
摘要翻译： 公开了能够抑制投影图像发生亮度不均匀性同时减少斑点噪声的显示装置。 显示装置（100）包括控制部分（15），其连续地向激光束产生部分（12,13,14）供电，持续时间长于第一周期，从而控制激光束产生部分输出激光束 以及在扫描一个图像形成元件（1,2）的第二周期中控制激光束产生部分至少停止激光束的输出。
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公开(公告)号：US20130010211A1
公开(公告)日：2013-01-10
申请号：US13635554
申请日：2011-03-07
CPC分类号： G02B27/48 , G02B26/10 , G09G3/002 , G09G3/02 , G09G2320/0233
摘要： Disclosed is a display device capable of inhibiting a projected picture from occurrence of brightness unevenness while reducing speckle noise. The display device (100) includes a control portion (15) continuously supplying current to a laser beam generation portion (12, 13, 14) nonstop for a period longer than a first period thereby controlling the laser beam generation portion to output the laser beam and controlling the laser beam generation portion to stop the output of the laser beam at least once in a second period scanning one image forming element (1, 2).
摘要翻译： 公开了能够抑制投影图像发生亮度不均匀性同时减少斑点噪声的显示装置。 显示装置（100）包括控制部分（15），其连续地向激光束产生部分（12,13,14）供电，持续时间长于第一周期，从而控制激光束产生部分输出激光束 以及在扫描一个图像形成元件（1,2）的第二周期中控制激光束产生部分至少停止激光束的输出。
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公开(公告)号：US20090189923A1
公开(公告)日：2009-07-30
申请号：US12358634
申请日：2009-01-23
CPC分类号： H04N5/74 , H04N9/3132
摘要： Disclosed is a laser projector to display an image having a predetermined number of gradations by a combination of n division gradations, each being set with a maximum luminance, comprising: a storage section to store a luminance value of each of the gradations, and division signals being associated with each other, each of the division signals corresponding to an intensity of each of the division gradations, and the division gradations being combined with each other to represent the luminance value; a determination section to determine the division signal of each of the division gradations corresponding to the luminance value of each pixel which constitutes the image; and a signal output section to divide a display period of the each pixel into n intervals, and to sequentially output the division signal of each of the division gradations to a light source in a predetermined order, in each of the intervals.
摘要翻译： 公开了一种激光投影机，其通过n个分级灰度的组合来显示具有预定数量的灰度的图像，每个分割灰度被设置为最大亮度，包括：存储部分，用于存储每个灰度的亮度值，以及除法信号 彼此相关联，每个分割信号对应于每个分割灰度的强度，并且分割灰度彼此组合以表示亮度值; 确定部分，用于确定与构成图像的每个像素的亮度值相对应的每个分割灰度的分割信号; 以及信号输出部分，用于将每个像素的显示周期划分为n个间隔，并且在每个间隔中以预定顺序顺序地将每个分割灰度的分割信号输出到光源。
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