发明授权
- 专利标题: Image display device
- 专利标题(中): 图像显示装置
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申请号: US09370660申请日: 1999-08-06
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公开(公告)号: US06417895B1公开(公告)日: 2002-07-09
- 发明人: Seiichiro Tabata , Kazuya Yamanaka , Kazunari Hanano
- 申请人: Seiichiro Tabata , Kazuya Yamanaka , Kazunari Hanano
- 优先权: JP10-224921 19980807
- 主分类号: G02F11333
- IPC分类号: G02F11333
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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