Observer tracking directional display and observer tracking illu

Details Observer tracking directional display and observer tracking illu Observer tracking directional display and observer tracking illu

1997-09-25

1999-12-28

Lee, John R.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

2502031, 250204, 2502061, 359458, 359466, 348 51, 348 54, 348 59, G02B 2700, H04N 1300

Patent

active

060084847

ABSTRACT:
Observer tracking is provided in an autostereoscopic 3D display, for instance of the type including an LCD panel 2 behind a parallax barrier. An infrared sensor such as a position sensitive detector is provided on the LCD panel. The parallax barrier extends over the detector so as to form an image of the observer or of a reflective target worn by the observer on the detector. The parallax barrier is moved so as to keep the image at a constant position on the detector. The viewing zone thus track the observer.

REFERENCES:
patent: 5083199 (1992-01-01), Borner
Search Report for Application No. GB 9620261.9; Dated Dec. 12, 1996.
European Search Report for Application No. 97307570.8; Dated Feb. 17, 1998.
H. Imai et al., SPIE, vol. 2653, pp. 49-55, 1996, "Eye-Position Tracking Stereoscopic Display Using Image Shifting Optics" (no month provided).
T. Hattori et al., SPIE, vol. 2177, pp. 143-149, 1994, "Stereoscopic Liquid Crystal Display I (General Description)" (no month provided).

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