Real-time ultra-high resolution image projection display using l

Details Real-time ultra-high resolution image projection display using l Real-time ultra-high resolution image projection display using l

1984-10-29

1986-09-09

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358236, 358231, 358 60, 350371, H04N 574

Patent

active

046112456

ABSTRACT:
A wide screen display enables a number of viewers the simultaneous viewing f rapidly updated data in real time at video rates. A beam of coherent radiation from a laser is modulated at video rates in an acousto-optic modulator. The modulated beam is fed to an X-scanner that imparts an acousto-optic displacement of the modulated beam in the X-direction. A Y-scanner is aligned to receive the X-scanned modulated beam and imparts an acousto-optic reciprocal displacement of the beam so that the video modulated beam is displaced in both the X- and Y-directions. A liquid crystal light valve is disposed to receive the X and Y displaced modulated beam so that it scans the surface of the light valve to stimulate the photosensor layers within. This causes the impression of a replica voltage pattern on a bi-refringent liquid crystal in the valve. A high intensity lamp projects a high intensity incoherent light beam onto the liquid crystal light valve via a polarizing biprism. Since the bi-refringent liquid crystal has been modulated by the X- and Y-scanned modulated coherent beam, a corresponding image is reflected from the bi-refringent liquid crystal and onto the screen. The acousto-optic modulation X-scan and Y-scan occur at much higher rates and with greater control than conventional arrangements so that the resolution of two about 2,000 lines at a video rate is possible. The real-time display provides a number of viewers with a more realistic image so that responsive decisions and actions may be taken.

REFERENCES:
patent: 3514534 (1970-05-01), Korpel
patent: 3549800 (1970-12-01), Baker
patent: 3703137 (1972-11-01), Anderson et al.
patent: 3713721 (1973-01-01), Watson
patent: 3723651 (1973-03-01), Gorog
patent: 3727001 (1973-04-01), Gottlieb
patent: 3818129 (1974-06-01), Yamamoto
patent: 3894182 (1975-07-01), Yamamoto et al.
patent: 4295159 (1981-10-01), Carollo et al.

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