发明授权
US5353133A A display having a standard or reversed schieren microprojector at each
picture element
失效
在每个图像元素处具有标准或反转的schieren微型投影仪的显示器
- 专利标题: A display having a standard or reversed schieren microprojector at each picture element
- 专利标题(中): 在每个图像元素处具有标准或反转的schieren微型投影仪的显示器
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申请号: US182684申请日: 1994-01-18
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公开(公告)号: US5353133A公开(公告)日: 1994-10-04
- 发明人: Jan Bernkopf
- 申请人: Jan Bernkopf
- 申请人地址: PA Pittsburgh
- 专利权人: Magnascreen Corporation
- 当前专利权人: Magnascreen Corporation
- 当前专利权人地址: PA Pittsburgh
- 主分类号: F21V8/00
- IPC分类号: F21V8/00 ; G02B6/28 ; G02B6/34 ; G02B6/42 ; G02F1/1333 ; G02F1/1334 ; G02F1/1335 ; G02F1/13357 ; F16C29/02 ; F21V7/04 ; G02F1/13
摘要:
A flat-panel display system and a display method utilizing microprojection techniques whereby each pixel of the display acts as its own micro-projector. The micro-projector utilizes a reversed Schlieren optical arrangement. A flat fiber-optic illuminator and an illumination method provide collimated light for the display. A layer of light scattering material such as polymer dispersed liquid crystal (PDLC) is interposed between the illuminator and the rear-projection screen of the display. The scattering layer, when in a first state, allows the collimated light to pass through openings in an aperture plate that is part of the microprojection display. In a second state, the scattering layer scatters the collimated light. Side and vertical walls of the aperture plate absorb most of the scattered light resulting in a high contrast ratio for the display. The degree of scattering can be controlled to provide for a gray scale for the display. One manner of control is the use of active matrix components on a substrate of the display.
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