20-01-2011, 02:18 PM
Surface conduction.pptx (Size: 1.74 MB / Downloads: 69)
COLLEGE OF ENGINEERING THALASSERY
INTRODUCTION
DISPLAY TECHNOLOGY TRENDS
H.D.T.V.
F.E.D.
S.E.D.
VARIOUS DISPLAY TECHNOLOGIES: AN OVERVIEW
CATHODE RAY TUBE ( CRT )
Earliest displays
A specialized vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface
Later RGB color model for displays in color monitors
Display width is limited
Affected by external fields
Bulky , high power consumption and heat production
LIQUID CRYSTAL DISPLAY ( LCD )
Displays thinner than ( CRT ) technology.
LCD’s consume much less power
Work on the principle of blocking light rather than emitting it.
LCD has a grid of conductors with pixels located at each intersection in the grid.
A current is sent across two conductors on the grid to control the light for any pixel .
Slow response time
Less viewable angle
Difficulty in producing dark and grey colors
PLASMA DISPLAY