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    • 37. 发明授权
    • Projection display device, and speckle reduction element
    • 投影显示装置和散斑元件
    • US07997737B2
    • 2011-08-16
    • US12295072
    • 2007-04-05
    • Tatsuo ItohTetsuro MizushimaKazuhisa Yamamoto
    • Tatsuo ItohTetsuro MizushimaKazuhisa Yamamoto
    • G03B21/14G02F1/29
    • H04N9/3161G02B27/48G02F2203/12G03B21/005H04N9/3152
    • A projection display device enhances reliability and reduces speckle noise. A blue laser, a red laser, and a green laser emit blue laser light, red laser light, and green laser light, respectively. A spatial light modulation element modulates the blue laser light emitted from the blue laser, the red laser light emitted from the red laser, and the green laser light emitted from the green laser. A projection lens projects the laser light modulated by the spatial light modulation element onto a screen. First and second light diffusing elements are arranged on an optical axis between the blue laser, the red laser, and the green laser, and the spatial light modulation element to change the degree of diffusion of the blue laser light, the red laser light, and the green laser light temporally and electrically.
    • 投影显示装置增强可靠性并减少斑点噪声。 蓝色激光,红色激光和绿色激光分别发出蓝色激光,红色激光和绿色激光。 空间光调制元件调制从蓝色激光发射的蓝色激光,从红色激光发射的红色激光以及从绿色激光发出的绿色激光。 投影透镜将由空间光调制元件调制的激光投影到屏幕上。 第一和第二光漫射元件布置在蓝色激光器,红色激光器和绿色激光器之间的光轴上,以及空间光调制元件,以改变蓝色激光,红色激光和 绿色激光时间和电气。