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    Projection-type liquid crystal display device
    1.
    发明授权
    Projection-type liquid crystal display device 失效
    投影式液晶显示装置

    公开(公告)号：US6072458A

    公开(公告)日：2000-06-06

    申请号：US842400

    申请日：1997-04-24

    申请人： Katsumi Asakawa ,  Hiroaki Ishitani ,  Kozo Ishida ,  Kouhei Tamano ,  Shigeharu Yoshikawa ,  Hiroaki Sugiura

    发明人： Katsumi Asakawa ,  Hiroaki Ishitani ,  Kozo Ishida ,  Kouhei Tamano ,  Shigeharu Yoshikawa ,  Hiroaki Sugiura

    IPC分类号： G02F1/13 ,  G02F1/133 ,  G09F9/00 ,  G09G3/36 ,  H04N5/74 ,  H04N9/31 ,  G09G5/00

    CPC分类号： H04N9/3105 ,  G09G3/36 ,  H04N9/3144 ,  G09G2320/041 ,  G09G3/3607 ,  G09G3/3655

    摘要： A projection-type liquid crystal display device having a light source for emitting a luminous flux; a liquid crystal light valve for modulating the luminous flux emitted by the light source means; a liquid crystal drive circuit for applying the common voltage to the common electrode and the video signal to the source electrode; a projection lens for projecting the luminous flux modulated by the liquid crystal light valve onto a screen; a liquid crystal temperature detector for detecting temperature in the vicinity of the liquid crystal light valve; and a controller. The controller controls the common voltage and/or the source voltage on the basis of values detected by the liquid crystal temperature detector in such a way that fluctuation in the light transmittance of the liquid crystal light valve means is reduced.

    摘要翻译： 一种具有用于发射光通量的光源的投影型液晶显示装置; 用于调制由光源装置发射的光束的液晶光阀; 用于将公共电压施加到所述源电极的液晶驱动电路和所述视频信号; 投影透镜，用于将由液晶光阀调制的光束投影到屏幕上; 用于检测液晶光阀附近的温度的液晶温度检测器; 和控制器。 控制器基于由液晶温度检测器检测的值以使液晶光阀装置的透光率的波动减小的方式控制公共电压和/或源极电压。

    Projection-type liquid crystal display apparatus
    2.
    发明授权
    Projection-type liquid crystal display apparatus 失效
    投影式液晶显示装置

    公开(公告)号：US6072459A

    公开(公告)日：2000-06-06

    申请号：US959232

    申请日：1997-10-28

    申请人： Katsumi Asakawa ,  Hiroaki Ishitani ,  Kouhei Tamano ,  Shigeharu Yoshikawa ,  Akihisa Miyata

    发明人： Katsumi Asakawa ,  Hiroaki Ishitani ,  Kouhei Tamano ,  Shigeharu Yoshikawa ,  Akihisa Miyata

    IPC分类号： G03B33/12 ,  G02F1/13 ,  G02F1/133 ,  G03B21/16 ,  G09F9/00 ,  H04N5/74 ,  H04N9/31 ,  G09G3/18

    CPC分类号： G02F1/133382 ,  G03B21/16 ,  H04N9/3105 ,  H04N9/312 ,  H04N9/3144

    摘要： A projection-type liquid crystal display apparatus that prevents deterioration of a projected image occurring attributable to lowering of the temperature of a liquid crystal panel, the difference in the temperature between the liquid crystal panels and temperature inclination in the liquid crystal panel. A projection-type liquid crystal display apparatus having a light source 1, liquid crystal panels 12, 13 and 14 for modulating a light beam emitted by the light source 1, a projection lens 21 for projecting the modulated light beam onto a screen 28, temperature detectors 25, 26 and 27 for detecting the temperatures of portions adjacent to the liquid crystal panels 12, 13 and 14, heater elements 18, 19 and 20 disposed adjacent to image forming surfaces of the liquid crystal panels 12, 13 and 14 and on a light path of a light beam emitted from the light source 1, a drive circuit 40 for operating the heater elements 18, 19 and 20 and a control unit 35 for controlling the heat generating performance of the heater elements 18, 19 and 20 in accordance with values detected by the temperature detectors 25, 26 and 27.

    摘要翻译： 一种投影型液晶显示装置，其防止由于液晶面板的温度降低而引起的投射图像的劣化，液晶面板之间的温度差异和液晶面板中的温度倾斜。 具有用于调制由光源1发射的光束的光源1，液晶面板12,13和14的投射型液晶显示装置，用于将调制光束投射到屏幕28上的投影透镜21，温度 用于检测与液晶面板12,13和14相邻的部分的温度的检测器25,26和27，与液晶面板12,13和14的图像形成表面相邻设置的加热器元件18,19和20，以及 从光源1发射的光束的光路，用于操作加热器元件18,19和20的驱动电路40以及用于控制加热器元件18,19和20的发热性能的控制单元35，根据 由温度检测器25,26和27检测的值。