利用像素移动技术提高液晶光阀投影图像分辨率

为了提高薄膜场效应晶体管液晶显示器(TFT-LCD,以下简称液晶光阀)投影图像的分辨率,提出了一种利用压电陶瓷驱动的平台拖动液晶光阀做X、y方向上的精确移动,实现液晶光阀像素移动的方法.介绍了液晶光阀硬件结构的特点,基于这些特点提出了利用像素移动技术提高投影图像分辨率的原理.根据计算得出X、Y方向精确位移运动的精度要求为10 nm量级,进而选择了实现这样高精度运动的机械结构.提出了3种检测试验结果的方案,绘制了整体试验方案的结构框图.最后,搭建试验平台验证了试验原理的正确性和有效性.采用像素移动技术后,利用液晶光阀投影得到的图像的分辨率在X、Y方向上分别提高到原来的2倍,总像素个数为原来的4倍,突破了星模拟器的分辨率完全受限于显示器件分辨率的状况.

Enhancement of resolution for projective image of TFT-LCD by pixel-multiplexing

To improve the resolution of projective image of a Thin Film Transistor-Liquid Crystal Display(TFT-LCD),a method was proposed by using a piezo-stage to drive the TFT-LCD movement in X and Y directions to implement the pixel-multiplexing of the TFT-LCD.The hardware configuration of the TFT-LCD was introduced,and the principle of improving the resolution of projective image by the pixel-multiplexing was presented.On the basis of accuracy demand of displacement movement to be 10 nm,the moving mechanism that can achieve a higher precision was chosen.Furthermore,three kinds of test schemes were proposed to prove the obtained results,and a experimental platform was constructed to verify the correction and efficiency of test principle.Experimental results show that the image resolution projected by the TFT-LCD has been doubled in X and Y directions,respectively,and total pixels are four times that of traditional imaging method.Proposed method changes the situation that the resolution of a star simulator is limited by that of the display device.