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Internal prism focus system with a single projection lens. 50 inch fixed screen projector with two projector lenses with three tubes. 60 fL on screen brightness. 72 inch fixed screen projector with two projector lenses with crt three tubes. 30 fL on screen brightness. 50 inch screen projector.
Up to 120″ (3.04 m) [47] Up to 150″ (3.8 m) [48] (152" experimental) [49] Up to 97″ (2.46 m) [50] Maintenance Hazardous to repair or service due to high-voltage, requires skilled convergence calibration and adjustments for geographic location changes. [51] Glass display tube is evacuated and carries risk of implosion if improperly handled.
Experimental, possibly. virtual reality. Depends. on system. Major technologies are CRT, LCD and its derivatives (Quantum dot display, LED backlit LCD, WLCD, OLCD), Plasma, and OLED and its derivatives (Transparent OLED, PMOLED, AMOLED). An emerging technology is Micro LED. Cancelled and now obsolete technologies are SED and FED.
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Rear-projection television. Mid-2000s RPTV with HDTV tuner and YPbPr input as well as DVI (digital) video inputs. Rear-projection television (RPTV) is a type of large-screen television display technology. Until approximately 2006, most of the relatively affordable consumer large screen TVs up to 100 in (250 cm) used rear-projection technology.
A carousel slide projector is a slide projector that uses a rotary tray to store slides, used to project slide photographs and to create slideshows. It was first patented on May 11, 1965, by David E. Hansen of Fairport, New York. Hansen was an industrial designer at the Eastman Kodak Company. [1] A patent for the rotary tray was granted in 1966 ...
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