发明授权
US06417895B1 Image display device 失效
图像显示装置

Image display device
摘要:
The present invention provides an image display device including an LCD, a polarization switching liquid crystal cell, a birefringent plate, and an eyepiece. The LCD displays an image using a plurality of arrayed pixel locations. The polarization switching liquid crystal cell has a plurality of electrodes incorporated therein and switches the direction of polarization in which light emitted from the LCD is polarized. The birefringent plate varies the optical path of light emitted from the polarization switching liquid crystal cell depending on the direction of polarization. The eyepiece magnifies light representing an image displayed on the LCD. The LCD and polarization switching liquid crystal cell are positioned so that the distance L1 from the eyeballs to the virtual image plane of the LCD and the distance L2 from the eyeballs to the virtual image plane of the polarization switching liquid crystal cell will have the relationship of 1/L2−1/L1≧0.4 D or L2≦200 mm. Otherwise, the birefringent plate or the like is coated with an anti-reflective coating. The image display device thus makes unnecessary streaks or flickers indiscernible and displays an easy-to-see image.
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