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.