CN1729502A - 投影式视频显示器 - Google Patents
投影式视频显示器 Download PDFInfo
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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Abstract
最佳处理部分(21)输入视频信号(RGB)信号,并对视频信号中的1帧视频进行分析。例如,如果在1帧视频的所有点中红色的强度为百分之零,则最佳处理部分(21)将控制信号提供到光源增益调整部分(22),以便使照明设备(1R)的增益为百分之零(最小光量)。光源增益调整部分(22)接收控制信号,并控制到照明设备(1R)的电源。此外,最佳处理部分(22)将驱动指令提供到LCD信号处理部分(23),以便针对液晶显示板(3R)的所有点,使光透射量为百分之零。
Description
技术领域
本发明涉及投影式视频显示器,诸如,液晶投影机等。
背景技术
通常,用于液晶投影机的照明装置等由诸如超高压汞灯、金属卤化物灯、氙灯等灯以及能够使照射光为平行光的抛物面反射器构成。此外,近几年,根据更长的使用寿命以及电能节省等的观点,尝试使用发光二极管(LED)作为光源(见日本专利待审公开NO.H10-186507)。)
然而,现有技术的电能节省是通过固体光源本身的低电能消耗操作特性得到实现的,并且还未实现另外的电能节省照明设备。
发明内容
考虑到前述情况,本发明的目的是提供一种能够通过使用诸如发光二级管等固体光源来实现电能节省的投影式视频显示器。
为了解决上述问题,本发明的投影式视频显示器包括:第一固体光源,发射红色光;第二固体光源,发射绿色光;第三固体光源,发射蓝色光;显示板,用于接收并调制来自所述光源的所述颜色光;装置,用于投影由所述已调制的颜色光形成的全色图像光;光源调整装置,根据视频信号信息,通过控制提供到其上的功率来调整所述固体光源的发射光量;以及装置,用于控制对每个显示板的驱动信号,从而与各个颜色的发射光量的调整相对应。
利用上述结构,根据视频信号,通过控制提供给固体光源的功率来调整固体光源的发射光量,从而存在越暗的视频,消耗越少的电能。此外,不需要具有高冷却能力,除此之外,能够降低用于冷却的电能消耗。
每个固体光源通过设置有多个固体光发射元件形成,且所述光源调整装置可以通过控制从多个固体光发射元件向外发出的光发射的个数来调整每个固体光源的发射光量。或者,其可以如下进行配置:每个固体光源通过设置有多个固体光发射元件形成,且所述光源调整装置通过控制施加到每个固体光发射元件的功率来调整每个固体光源的发射光量。或者,其可以如下进行配置:每个固体光源通过设置多个固体光发射元件形成,所述光源调整装置使每个固体光发射元件执行脉冲光发射,并通过控制脉冲光发射的占空比来调整每个固体光发射元件的发射光量。
可以通过控制向其提供的电能来调整针对各个颜色的所述固体光源的发射光量,从而在其中显示板的等级值最高的状态下,获得1帧视频中各个颜色的最高值。这使电能消耗能够尽可能地降低。
可以对投影式视频显示器进行如下配置:将通过对来自各个光源的各个颜色的光进行组合获得的白颜色光引导到作为所述显示板的单面板全色显示板。或者,可以对投影式视频显示器进行如下配置:将通过对来自各个光源的各个颜色的光进行组合获得的白色光进行分离,并分别将各个颜色的光的每一个引导到作为所述显示板的红色用显示板、绿色用显示板和蓝色用显示板。或者,可以对投影式视频显示器进行如下配置:将各个颜色光的每一个引导到作为各个颜色光的红色用显示板、绿色用显示板和蓝色用显示板。
附图说明
图1是示出了本发明实施例的投影式视频显示器的光学系统和控制系统的描述图;
图2示出了其中三个照明装置存在于一个平面表面中的照明装置;
图2中的部分(a)示出了其中所有LED芯片均接通的状态;
图2的部分(b)示出了其中三个照明装置中的部分LED芯片断开的状态;
图3是示出了图1所示的照明装置之外的红色用照明装置的前视图;
图3中的部分(a)示出了所有LED芯片均接通的状态;
图3中的部分(b)示出了其中LED芯片11的部分断开的状态;
图4是示出了在每个帧周期期间脉冲光发射的占空率的变化状态的描述性图示;
图5是单面板DMD系统的描述图;以及
图6是三面板DMD系统的描述图。
具体实施方式
下文中,将参照图1到6描述根据本发明实施例的投影式视频显示器。
图1是示出了三个面板的投影式视频显示器的光学系统和控制系统的图。此投影式视频显示器具有三个照明装置1R、1G和1B(下文中,当表示未指定各个照明装置时,使用数字“1”)。光源1R发出红色的光,光源1G发出绿色的光,以及光源1B发出蓝色的光。从每个照明装置1发出的光通过凸透镜2引导到液晶显示板3R、3G和3B(下文中,当表示未指定各个液晶板时,使用数字“3”)。每个液晶显示板设置有入射侧偏振片、通过将液晶密封在一对玻璃板之间形成的面板部分(其中,形成点电极和配向膜(alignment film))、以及发射侧偏振片。将通过透过液晶显示板3R、3G和3B得到调制的调制光(各个颜色的图像光)利用二向色棱镜4进行组合,并使其为彩色图像光。利用投影透镜5投影彩色图像光,并将其显示在屏幕上。
照明装置1包括:光源12,其中按照阵列状排列LED芯片11,且将透镜元件14排列在每个LED芯片11的光入射侧上;一对蝇眼透镜13,其对从每个LED芯片11发出的、且由透镜元件14使其平行的光进行积分并引导到液晶板3上。所述一对蝇眼透镜13由一对透镜群13a、13b构成,且每对透镜将从每个LED芯片11发出的光引导到液晶显示板3的整个表面。LED芯片11通过透明树脂形成,并作为以凸形形成透明树脂的结果,形成了透镜元件14。LED芯片11、透镜元件14和透镜群13a中的每个透镜均按照矩形形状形成,此外,矩形的高宽比与液晶显示板3的高宽比一致或近似一致。注意,可以使LED芯片11、透镜元件14和透镜群13a中的每个透镜的高宽比不同于液晶显示板3的高宽比。在此情况下,优选地,通过使用象变透镜,使引导到液晶板3的光通量的高宽比与液晶板3的高宽比一致或近似一致。
最佳处理部分21输入视频信号(RGB信号),并对视频信号中的1帧视频进行分析。具体地,最佳处理部分检测形成1帧视频的各个点的红色强度(红色等级信号)、绿色强度(绿色等级信号)、和蓝色强度(蓝色等级信号)。这里,为了使描述简单化,假设各个颜色的强度大体上处于256等级的范围内,并且此范围处于百分之零和百分之百之间,液晶显示板3的光透射量受100个等级控制,至于照明装置1,在百分之1和百分之百之间的范围内以每百分之一对光量进行调整。
如果在1帧视频的所有点中红色的强度是百分之零,则最佳处理部分21将使照明装置1R的增益为百分之零(最小光量)的控制信号施加到光源增益调整部分22。光源增益调整部分22接收控制信号,并控制要供给照明装置1R的功率(电压)。此外,最佳处理部分21将如针对液晶显示板3R的所有点,将用于使光透射量为百分之零的驱动指令施加到LCD信号处理部分23。LCD信号处理部分23根据该驱动指令来驱动液晶显示板3R的点。
当1帧视频中红色的强度的最高值为百分之五十时,对于其红色的强度值为百分之五十的点,光透射量为百分之百,而对于照明装置1R,发射光量为百分之五十。针对具有除了百分之五十之外的红色的强度值的点,可以根据视频信号,将与使其为百分之五十的、与照明装置1R的发射光量相对应的校正值应用于原始强度的红色。即,根据功率提供控制,可以对针对各个颜色的固体光源的发射光量进行调整,从而在其中显示板的等级值最高的状态下,获得1帧视频中各个颜色的最高值。这样的控制实现了要在照明装置1中消耗的功率的最小量。不必说,本发明并不限于这样的控制,对于其红色的强度值为百分之五十的点,可以执行使光透射量为百分之七十和使照明装置1R的发射光量为百分之七十的控制。同样,在此情况下,针对具有除了百分之五十之外的红色强度值的点,可以根据视频信号,将与使其为百分之七十的、与照明装置1R的发射光量相对应的校正值应用于原始强度的红色。
此外,也可以针对其它颜色执行相似的控制。传统投影式视频显示器按照在显示黑色视频时也以最高光量发射光的方式来接收电源。然而,根据本发明的投影式视频显示器能够向照明装置1提供等于零的功率提供,例如,在显示黑色视频时。结果,能够极大地降低能量消耗。
注意,在上述结构中,提供给每个照明装置1(即,LED芯片11)的功率(电压)受光源增益调整部分22控制,然而,可以通过控制用于发射光的LED芯片11的数量来调整每个照明装置1的发射光量。图2示出了其中存在三个照明装置1R、1G和1B的照明装置。图2中的部分(a)示出了其中所有LED芯片11均接通的状态,且图2中的部分(b)示出了其中在照明装置1R、1G和1B中部分LED芯片11断开的状态。图中的黑色示出了断开的LED芯片11。注意,各个颜色的光是重叠的,并从这样的照明装置发射出去,从而可以将光引导到单面板全色显示板。或者可以利用分色镜将光分成各个颜色的光并引导到针对各个颜色的显示板。此外,图3是示出了图1中所示的照明装置1R的前视图。即,照明装置1R按照以下方式形成:将发出红颜色光的LED芯片11以陈列状排列在一个平面表面中。图3中的部分(a)示出了其中所有LED芯片11均接通的状态,而图3中的部分(b)示出了其中部分LED芯片11断开的状态。当断开LED芯片11时,如图2中的部分(b)和图3中的部分(b)所示,可以以散布方式断开LED芯片,但并不总是此情况,也可以从位于边缘侧的LED芯片开始顺序地断开LED芯片。
此外,使LED芯片11执行脉冲光发射,并如图4中所示,可以通过改变每个帧周期期间(1V:垂直周期)脉冲光发射的占空比来控制光量。
此外,示出了使用液晶显示板的结构,但是,本发明并不限于使用液晶显示板,代替地,可以使用其中每个微镜均单独驱动(例如,数字微镜器件:DMD)类型的显示板。在单面板投影式视频显示器的情况下,例如,如图5所示,按照分别面向二向色棱镜4的四个侧面的三个的方式来排列照明装置1R、1G和1B,并从二向色棱镜4的另一侧发射白色光。然后,通过透镜7和曲面镜10将白色光照射到单面板DMD9上。利用投影透镜5投影由单面板DMD9反射的光(全色图像光)。此外,在三面板投影式视频显示器的情况下,例如,如图6中所示,按照分别面向二向色棱镜4的四个侧面的三个的方式来排列照明装置1R、1G和1B,并从二向色棱镜4的另一侧表面发射白颜色光。然后,通过透镜7,将白色光引导到全内反射(TIR)棱镜30。将由全内反射(TIR)棱镜30反射的白色光引导到由三个棱镜形成的分色棱镜31。然后,将各个颜色的光引导到针对各个颜色的的DMD 9R、9G和9B。将从其中反射的光(各个颜色的图像光)再次入射到分色棱镜31上,并在成为全色图像光之后,从分色棱镜31发射出去。从分色棱镜31发出的全色图像光透射过全内反射(TIR)棱镜30,并利用投影透镜5进行投影。
照明装置1的结构并不限于上述结构。例如,代替蝇眼透镜对13,能够使用杆式积分器。此外,固体光源并不限于发光二极管(LED),能够使用激光二极管等。此外,最佳处理部分21可以对输入视频信号执行三级别确定(暗、中等、亮),并且可以在所述三个等级下控制光量和面板的驱动。
如上所述,利用本发明,根据视频信号调整固体光源的发射光量,从而存在越暗的视频退出,则消耗的能量越少。此外,存在以下优点:不需要具有高冷却能力,以及能够降低用于冷却的能量消耗。
Claims (8)
1、一种投影式视频显示器,包括:
第一固体光源,发射红色光;
第二固体光源,发射绿色光;
第三固体光源,发射蓝色光;
显示板,用于接收并调制来自所述光源的所述颜色光;
装置,用于投影由所述已调制的颜色光形成的全色图像光;
光源调整装置,根据视频信号信息,通过控制提供到其的功率来调整所述固体光源的发射光量;以及
装置,用于控制对每个显示板的驱动信号,从而与各个颜色的发射光量的调整相对应。
2、根据权利要求1所述的投影式视频显示器,其特征在于所述每个固体光源通过设置有多个固体光发射元件形成,且所述光源调整装置通过控制从多个固体光发射元件向外发出的光发射个数来控制每个固体光源的发射光量。
3、根据权利要求1所述的投影式视频显示器,其特征在于所述每个固体光源通过设置有多个固体光发射元件形成,且所述光源调整装置通过控制施加到每个固体光发射元件的功率来调整每个固体光源的发射光量。
4、根据权利要求1所述的投影式视频显示器,其特征在于所述每个固体光源通过设置多个固体光发射元件形成,所述光源调整装置使每个固体光发射元件执行脉冲光发射,并通过控制脉冲光发射的占空比来调整每个固体光发射元件的发射光量。
5、根据权利要求1到4之一所述的投影式视频显示器,其特征在于通过控制向其施加的功率来调整针对各个颜色的所述固体光源的发射光量,从而在其中显示板的等级值最大的状态下,获得1帧视频中各个颜色的最高值。
6、根据权利要求1到5之一所述的投影式视频显示器,其特征在于将通过对来自各个光源的各个颜色的光进行组合获得的白颜色光引导到作为所述显示板的单面板全色显示板。
7、根据权利要求1到5之一所述的投影式视频显示器,其特征在于将通过对来自各个光源的各个颜色的光进行组合获得的白色光进行分离,并分别将各个颜色的光的每一个引导到作为所述显示板的红色用显示板、绿色用显示板和蓝色用显示板。
8、根据权利要求1到5之一所述的投影式视频显示器,其特征在于将各个颜色的光的每一个引导到作为各个颜色的光的红色用显示板、绿色用显示板和蓝色用显示板。
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2003
- 2003-12-25 CN CNB200380107244XA patent/CN100424547C/zh not_active Expired - Fee Related
- 2003-12-25 KR KR1020057011937A patent/KR100816971B1/ko not_active IP Right Cessation
- 2003-12-25 US US10/540,544 patent/US7270425B2/en not_active Expired - Fee Related
- 2003-12-25 WO PCT/JP2003/016835 patent/WO2004059608A1/ja active Application Filing
- 2003-12-25 JP JP2004562950A patent/JP4245563B2/ja not_active Expired - Fee Related
- 2003-12-25 EP EP03782910A patent/EP1577872A4/en not_active Withdrawn
Cited By (8)
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CN102239445A (zh) * | 2008-12-05 | 2011-11-09 | 三洋电机株式会社 | 照明装置及投射型影像显示装置 |
CN103391412A (zh) * | 2013-07-23 | 2013-11-13 | 华东师范大学 | 一种光源亮度自适应调节的图像显示方法及装置 |
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CN107129931A (zh) * | 2017-06-27 | 2017-09-05 | 中国计量科学研究院 | 生物分子光学检测器计量标准装置及使用方法 |
CN107129931B (zh) * | 2017-06-27 | 2023-04-18 | 中国计量科学研究院 | 生物分子光学检测器计量标准装置及使用方法 |
CN111352287A (zh) * | 2018-12-24 | 2020-06-30 | 深圳光峰科技股份有限公司 | 光源系统及投影设备 |
CN112596332A (zh) * | 2020-12-23 | 2021-04-02 | 广景视睿科技(深圳)有限公司 | 一种投影系统及投影仪 |
CN112596332B (zh) * | 2020-12-23 | 2022-03-11 | 广景视睿科技(深圳)有限公司 | 一种投影系统及投影仪 |
Also Published As
Publication number | Publication date |
---|---|
WO2004059608A1 (ja) | 2004-07-15 |
US20060050245A1 (en) | 2006-03-09 |
EP1577872A4 (en) | 2008-11-26 |
KR100816971B1 (ko) | 2008-03-26 |
KR20050088218A (ko) | 2005-09-02 |
JP4245563B2 (ja) | 2009-03-25 |
CN100424547C (zh) | 2008-10-08 |
JPWO2004059608A1 (ja) | 2006-04-27 |
EP1577872A1 (en) | 2005-09-21 |
US7270425B2 (en) | 2007-09-18 |
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