This set of Video Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Front Projection TV System, Direct View and Rear Projection System”.
1. Which of the following is the type of direct view display system?
a) CRT projector
b) Sony’s SXRD (Silicon X-tal Reflective Display)
c) Micro Display Corporation’s Liquid Fidelity
d)JVC’s D-ILA (Digital Direct Drive Image Light Amplifier)
View Answer
Explanation: In direct (front) view display, one electron beam creates the picture which is seen on the screen. The most common type of direct view display system is the old fashioned tube (CRT) projectors. LCD projector is also a direct view display.
2. In which projection system the image is displayed on the back of the screen through reflection?
a) Direct (Front)
b) Rear
c) Upwards
d) Downwards
View Answer
Explanation: Rear projection system displays an image on the back of the screen through reflection, which audience then view from the front. The image is formed on the screen due to combination of three different images red, green and blue. Depending on the strength of color light, the combination of RGB (Red, green and blue) produces visible spectrum.
3. Which projection TV system is used in movie theatres?
a) Downwards
b) Upwards
c) Rear
d) Front
View Answer
Explanation: In front projection TV system projector and screen are two different objects where the projector projects images on the front of the screen. This system is used in movie theatres. Projector location can be on a table or mounted to a ceiling. A painted wall can also be used as screen surface.
4. Rear and front projection systems do not use tiny CRT or LCD panels for creating pictures.
a) True
b) False
View Answer
Explanation: The above statement is false. Rear and front projection TV systems use tiny CRT or LCD panels for creating pictures. Front projection TV system can be reflective (picture is formed by light rays reflected from device) or transmissive (Picture is formed by passing through device and is magnified by lenses before projection on to screen).
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