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公开(公告)号：US08067725B2
公开(公告)日：2011-11-29
申请号：US12485614
申请日：2009-06-16
申请人： Ken Nishioka , Atsuya Hirano , Seiji Takemoto , Atsuhiko Chikaoka
发明人： Ken Nishioka , Atsuya Hirano , Seiji Takemoto , Atsuhiko Chikaoka
IPC分类号： G01D1/20
CPC分类号： H04N9/3164 , H04N9/3129
摘要： A deviation of an optic axis of a laser projector is detected, and the deviation is corrected. Laser projector's CPU executes: commanding a laser beam source of one color, out of laser beam sources of three colors, to emit a laser beam; shutting off the laser when sensing that the laser beam is received in a light-receiving region; applying a laser of a color to be detected as to the presence or absence of a deviation of the axis until its reception in the light-receiving region is sensed; keeping time starting when light reception in the light-receiving region is sensed and ending when light reception in a light-receiving region adjacent thereto is sensed; calculating a relative time difference of each of the colors with respect to a reference color; and correcting a light emission timing of the laser beam source of each of the color, based on the calculated time.
摘要翻译： 检测到激光投影仪的光轴的偏差，并且校正偏差。 激光投影机的CPU执行：从三种颜色的激光束源中指定一种颜色的激光束源，以发射激光束; 当感测到在光接收区域中接收到激光束时，关闭激光器; 对要检测的颜色的激光施加到轴的偏移的存在或不存在，直到感测到在光接收区域中的接收为止; 在感光区域中的光接收被感测时开始保持时间，并且当感测到与其相邻的光接收区域中的光接收时结束; 计算每个颜色相对于参考颜色的相对时间差; 以及基于所计算的时间来校正每种颜色的激光束源的发光定时。
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2.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：US20090128716A1
公开(公告)日：2009-05-21
申请号：US12263959
申请日：2008-11-03
申请人： Kenji Nagashima , Atsuhiko Chikaoka , Seiji Takemoto , Hiroki Matsubara , Atsuya Hirano , Hiroshi Nishigaki
发明人： Kenji Nagashima , Atsuhiko Chikaoka , Seiji Takemoto , Hiroki Matsubara , Atsuya Hirano , Hiroshi Nishigaki
IPC分类号： H04N5/74
CPC分类号： G06F3/04845 , G06F3/0423 , H04N9/3129
摘要： A projector includes: a laser beam generator configured to emit a laser beam according to an image signal; a beam splitter configured to split the laser beam into a first laser beam toward the first projection plane and a second laser beam toward the second projection plane; a scanning unit, disposed between the laser beam generator and the beam splitter, configured to scan the laser beam from the laser beam generator toward the beam splitter; a light receiver configured to receive reflected light of the first laser beam; a computation portion configured to compute positional information indicating a position of an obstacle located in an optical path of the first laser beam based on a light receiving result by the light receiver; and a display control portion configured to change the image signal so that a pointer is displayed in the image based on the positional information.
摘要翻译： 投影仪包括：激光束发生器，被配置为根据图像信号发射激光束; 分束器，其被配置为将激光束分裂成朝向第一投影平面的第一激光束，以及朝向第二投影平面的第二激光束; 设置在所述激光束发生器和所述分束器之间的扫描单元，被配置为将来自所述激光束发生器的激光束扫描到所述分束器; 被配置为接收第一激光束的反射光的光接收器; 计算部，被配置为基于所述光接收器的光接收结果计算表示位于所述第一激光束的光路中的障碍物的位置的位置信息; 以及显示控制部，被配置为基于所述位置信息来改变所述图像信号，使得指示体被显示在所述图像中。
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4.发明授权Dual-projection projector and method for projecting images on a plurality of planes 有权双投影投影仪和用于在多个平面上投影图像的方法公开(公告)号：US08123361B2
公开(公告)日：2012-02-28
申请号：US12263959
申请日：2008-11-03
申请人： Kenji Nagashima , Atsuhiko Chikaoka , Seiji Takemoto , Hiroki Matsubara , Atsuya Hirano , Hiroshi Nishigaki
发明人： Kenji Nagashima , Atsuhiko Chikaoka , Seiji Takemoto , Hiroki Matsubara , Atsuya Hirano , Hiroshi Nishigaki
IPC分类号： G03B21/26
CPC分类号： G06F3/04845 , G06F3/0423 , H04N9/3129
摘要： A projector includes: a laser beam generator configured to emit a laser beam according to an image signal; a beam splitter configured to split the laser beam into a first laser beam toward the first projection plane and a second laser beam toward the second projection plane; a scanning unit, disposed between the laser beam generator and the beam splitter, configured to scan the laser beam from the laser beam generator toward the beam splitter; a light receiver configured to receive reflected light of the first laser beam; a computation portion configured to compute positional information indicating a position of an obstacle located in an optical path of the first laser beam based on a light receiving result by the light receiver; and a display control portion configured to change the image signal so that a pointer is displayed in the image based on the positional information.
摘要翻译： 投影仪包括：激光束发生器，被配置为根据图像信号发射激光束; 分束器，其被配置为将激光束分裂成朝向第一投影平面的第一激光束，以及朝向第二投影平面的第二激光束; 设置在所述激光束发生器和所述分束器之间的扫描单元，被配置为将来自所述激光束发生器的激光束扫描到所述分束器; 被配置为接收第一激光束的反射光的光接收器; 计算部，被配置为基于所述光接收器的光接收结果计算表示位于所述第一激光束的光路中的障碍物的位置的位置信息; 以及显示控制部，被配置为基于所述位置信息来改变所述图像信号，使得指示体被显示在所述图像中。
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5.发明授权Image display apparatus, image display method, and recording medium having image display program stored therein 失效图像显示装置，图像显示方法和存储有图像显示程序的记录介质公开(公告)号：US08408720B2
公开(公告)日：2013-04-02
申请号：US12757669
申请日：2010-04-09
CPC分类号： G06F3/0425 , G06F1/1639 , H04N9/3129 , H04N9/3147 , H04N9/3194
摘要： A projector divides and projects a single image onto two different projection surfaces and performs virtual user interface through one projection surface. The projector projects a VUI screen image on a desk and projects a main projected screen image on a wall. The projector includes a light receiving element, which is installed at a position that receives light emitted to the desk (the projection surface of the VUI screen image) and reflected (or scattered) by an object in the vicinity of the desk. The projector calculates a position of the object based on a light detection timing of the light-receiving element and a scanning position of light at each time and changes a projected image based on the calculated position. The projector displays a designated region of the VUI screen image to be brightened.
摘要翻译： 投影机将单个图像分割并投影到两个不同的投影面上，并通过一个投影面进行虚拟用户界面。 投影机在桌面上投影VUI屏幕图像，并将主投影屏幕图像投影到墙上。 该投影仪包括光接收元件，该光接收元件安装在接收到桌面的光（VUI屏幕图像的投影面）的位置，并被桌子附近的物体反射（或分散）。 投影仪基于光接收元件的光检测定时和每次的光扫描位置来计算物体的位置，并基于计算出的位置改变投影图像。 投影仪显示要亮起的VUI屏幕图像的指定区域。
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6.发明授权Driving a laser scanning section using a basic period of a pulse signal based on a period of a resonance frequency and accumulated period errors to produce a correction period quantity 失效使用基于谐振频率的周期的脉冲信号的基本周期和累积的周期误差来驱动激光扫描部分，以产生校正周期数量公开(公告)号：US08368006B2
公开(公告)日：2013-02-05
申请号：US12782796
申请日：2010-05-19
CPC分类号： G02B26/101 , G02B26/127
摘要： A laser projector can generate a pulse signal capable of being generated according to the resolution of the clock signal, the pulse signal having a basic period and a basic pulse width each infinitely approximated to the characteristics of the resonance frequency. Moreover, because the laser projector can generate a pulse signal capable of correcting the errors led to be included in the approximated pulse signal, the laser projector can drive the scanning section with a horizontal vibration width corresponding to the resonance frequency, and can suitably display a projected image on a projection plane.
摘要翻译： 激光投影仪可以产生能够根据时钟信号的分辨率产生的脉冲信号，脉冲信号具有基本周期和基本脉冲宽度，每个基本脉冲宽度无限接近谐振频率的特性。 此外，由于激光投影仪能够产生能够校正导致包含在近似脉冲信号中的误差的脉冲信号，所以激光投影仪可以以对应于共振频率的水平振动宽度驱动扫描部，并且可以适当地显示 投影图像在投影平面上。
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公开(公告)号：US08057052B2
公开(公告)日：2011-11-15
申请号：US12424149
申请日：2009-04-15
CPC分类号： G03B21/00 , G02B26/0841 , G09G3/025 , G09G2330/026 , G09G2330/04 , H04N9/3129 , H04N9/3155
摘要： Disclosed in a laser projector to display an image by projecting a laser beam from a laser light source to a projection screen including an electromagnetic driven scan mirror to scan the laser beam from the laser light source, a detection unit to detect a back EMF which is generated by a drive of the electromagnetic driven scan mirror at a time of start-up of the laser projector, a first determination unit to determine whether a value of the back EMF which is detected by the detection unit exceeded a predetermined threshold or not and a light source control unit to start a lighting of the laser light source when the value of the back EMF is determined as exceeding the predetermined threshold by the determination unit.
摘要翻译： 公开在激光投影仪中，通过将激光束的激光束投射到包括电磁驱动扫描镜的投影屏幕来扫描来自激光光源的激光束来显示图像，检测单元检测反激电动势 在激光投影仪启动时通过电磁驱动扫描镜的驱动而产生的第一确定单元，用于确定检测单元检测到的反电动势的值是否超过预定阈值;以及 光源控制单元，当所述反电动势的值被所述确定单元确定为超过所述预定阈值时，开始所述激光源的点亮。
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公开(公告)号：US07959303B2
公开(公告)日：2011-06-14
申请号：US12393792
申请日：2009-02-26
IPC分类号： B41J2/435
CPC分类号： H04N9/3155 , H04N5/7458 , H04N9/3129
摘要： When a position detector detects that the position of a spot on a projection plane designates a non-projection region, the level of a driving signal of a laser is corrected. Specifically, the correlation between the quantity of laser light detected by a light-receiving portion and the level of the driving signal of the laser in accordance with prescribed data is detected. Then, the characteristic value of the laser indicated by the detected correlation is compared with the characteristic value at room temperature stored beforehand to indicate the correlation between the quantity of light emitted by the laser at room temperature and the level of the driving signal. Then, based on the comparison result, the level of the driving signal of the laser in accordance with image data is corrected.
摘要翻译： 当位置检测器检测到投影平面上的点的位置指定非投影区域时，校正激光器的驱动信号的电平。 具体地，检测由光接收部分检测的激光量与根据规定数据的激光器的驱动信号的电平之间的相关性。 然后，将由检测到的相关性表示的激光的特征值与预先存储的室温下的特性值进行比较，以指示在室温下由激光器发射的光量与驱动信号的电平之间的相关性。 然后，根据比较结果，校正与图像数据对应的激光的驱动信号的电平。
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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：US20090262314A1
公开(公告)日：2009-10-22
申请号：US12424149
申请日：2009-04-15
IPC分类号： G03B21/28
CPC分类号： G03B21/00 , G02B26/0841 , G09G3/025 , G09G2330/026 , G09G2330/04 , H04N9/3129 , H04N9/3155
摘要： Disclosed in a laser projector to display an image by projecting a laser beam from a laser light source to a projection screen including an electromagnetic driven scan mirror to scan the laser beam from the laser light source, a detection unit to detect a back EMF which is generated by a drive of the electromagnetic driven scan mirror at a time of start-up of the laser projector, a first determination unit to determine whether a value of the back EMF which is detected by the detection unit exceeded a predetermined threshold or not and a light source control unit to start a lighting of the laser light source when the value of the back EMF is determined as exceeding the predetermined threshold by the determination unit.
摘要翻译： 公开在激光投影仪中，通过将激光束的激光束投射到包括电磁驱动扫描镜的投影屏幕来扫描来自激光光源的激光束来显示图像，检测单元检测反激电动势 在激光投影仪启动时通过电磁驱动扫描镜的驱动而产生的第一确定单元，用于确定检测单元检测到的反电动势的值是否超过预定阈值;以及 光源控制单元，当所述反电动势的值被所述确定单元确定为超过所述预定阈值时，开始所述激光源的点亮。
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