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Bahirdar University Bahirdar institute of technology Faculty of computing Department of computer science Tesfahunegn Minwuyelet 1

LCD VS CRT VS LED VS PLASMA DISPLAY VS OLED VS LED-BACKLIGHT LCD

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Page 1: LCD VS CRT VS LED VS PLASMA DISPLAY VS OLED VS LED-BACKLIGHT LCD

Bahirdar University Bahirdar institute of technology

Faculty of computing

Department of computer science

Tesfahunegn Minwuyelet

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Page 2: LCD VS CRT VS LED VS PLASMA DISPLAY VS OLED VS LED-BACKLIGHT LCD

Table of Contents1 Cathode Ray Tube (CRT) Displays........................................................................................................1

2 Liquid Crystal Display (LCD).................................................................................................................2

3 Plasma Display Panels..........................................................................................................................2

4 Light-emitting diode (LED) Displays.....................................................................................................3

5 Organic Light-emitting diode (OLED) Displays.....................................................................................4

6 LED-backlight LCD................................................................................................................................5

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Page 3: LCD VS CRT VS LED VS PLASMA DISPLAY VS OLED VS LED-BACKLIGHT LCD

Prepare summary sheet that shows comparison of display devices listed below based on the following comparison criteria:-

a. Maximum possible screen size

b. Screen slimness

c. Brightness

d. Resolution

e. Contrast ratio

f. Power consumption

g. Price

h. Viewing Angle

i. Lifetime

j. Usage

1 Cathode Ray Tube (CRT) Displaysa. Maximum size for direct-view displays is limited to about 40 inches due to

practical and manufacturing restrictions

b. They have a big back and take up space on desk (i.e. they are heavy to pick up

and carry around).

c. It can easily increase the monitor’s brightness by reflecting the light.

d. Higher resolution.

e. The contrast features of the cathode ray tube monitor are considered highly

excellent (i.e. High contrast ratio (over 15,000:1)).

f. Higher power consumption.

g. Lower cost (i.e.The Cathode Ray Tube monitors have lower price rate than the

LCD display or Plasma display).

h. Excellent viewing angle.

i. Long life (a few or several decades, depending on use).

j. CRT are less fit to be installed in outdoor locations, although many were. Even

though CRTs are still popular in the printing and broadcasting industries as well

as in the professional video, photography, and graphics fields due to their greater

color fidelity, contrast and better viewing from off-axis (wider viewing angle).

CRTs also still find adherents in video gaming because of their higher resolution

per initial cost, fast response time, and multiple native resolutions.

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Page 4: LCD VS CRT VS LED VS PLASMA DISPLAY VS OLED VS LED-BACKLIGHT LCD

2 Liquid Crystal Display (LCD)a) Take up about 40% less desk space. LCDs are thin and compact.

b) It is a thin, flat panel used for electronically displaying information such as text,

images, and moving pictures (i.e. completely flat screen).

c) Produces very bright images due to high peak intensity. Very suitable for

environments that are brightly lit.

d) Works best at the native resolution. The native resolution cannot be changed. All

other resolutions require adjusting procedures which can cause considerable

deterioration of the image.

e) The aspect ratio and resolution are fixed (i.e. Lower contrast than CRTs due to a

poor black-level.)

f) Energy efficient. Consume less than 1/3 the power of a comparable CRT.

Consume less electricity than a CRT and produce little heat.

g) Considerably more expensive purchase price than comparable CRTs.(Cheaper

lifetime cost: lasts about 13,000 - 15,000 more hours than a typical CRT).

h) Longer life:-LCDs have a longer useful life than CRTs.

i) Restricted viewing angles. Viewing angles affect the brightness, contrast and

colours shown. Wide angles can lead to contrast and colour reversal.

j) Its uses include computer monitors, televisions, instrument panels, and devices

ranging from aircraft cockpit displays, to every-day consumer devices such as

clocks, calculators, and telephones.

3 Plasma Display Panelsa. Common to large TV displays 30 inches (76 cm) or larger. They can be

produced in fairly large sizes up to 3.8 meters (150 in) diagonally.

b. It is a type of flat panel display(i.e. Plasma displays are thinner than

cathode ray tube (CRT) displays)

c. Brighter than liquid crystal displays (i.e. Plasma displays are bright

(1,000 lux or higher for the module).

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Page 5: LCD VS CRT VS LED VS PLASMA DISPLAY VS OLED VS LED-BACKLIGHT LCD

d. Plasma TVs scale the video image of each incoming signal to the native

resolution of the display panel.

i. ED Resolutions1. 840×4802. 853×480

ii. HD Resolutions1. 1024×1024 (discontinued)2. 1024×7683. 1280×7684. 1366×7685. 1280×10806. 1920×1080

e. Has good contrast ratio.

f. Use more electrical power, on average, than an LCD TV. Power

consumption is 400 watts for a 127 cm (50 in) screen, 200 to 310 watts for

a 127 cm (50 in) display when set to cinema mode and Most screens are

set to "shop" mode by default, which draws at least twice the power

(around 500–700 watts) of a "home" setting of less extreme brightness.

g. Considerably more expensive purchase price than comparable CRTs

h. Wider viewing angles than those of LCD; images do not suffer from

degradation at high angles like LCDs

i. Long life time

j. It may cause a buzzing noise. For those who wish to listen to AM radio, or

are amateur radio operators (hams) or shortwave listeners (SWL), the

radio frequency interference (RFI) from these devices can be irritating or

disabling. Does not work well at high altitudes above 2 km due to pressure

differential between the gases inside the screen and the air pressure at

altitude.

4 Light-emitting diode (LED) Displaysa) Screen size: Up to 90 inches LEDs can be very small (smaller than 2 mm2) and

are easily populated to circuit board.

b) It is a flat panel display

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Page 6: LCD VS CRT VS LED VS PLASMA DISPLAY VS OLED VS LED-BACKLIGHT LCD

c) Has improved brightness.

d) Its contrast ratio is similar to plasma display.

e) Long life time

f) Command a price 20 percent above that of LCD featuring and identical screen

size and specification.

g) Life span : Around 100,000 hours

h) Viewing Angle : The brightness and color on LCD TVs shift noticeably over the

screen and depending on viewing angle

i) Power saving advantage make them attractive prospective for long term use.

j) It can be used as Flash an LED of type (Single LED and Multiple LEDs).and for

Traffic Light by use of LEDs

5 Organic Light-emitting diode (OLED) Displays a) Has max size. Can be made to larger sizes.

b) Thinner, lighter and more flexible.

c) Better impression for higher brightness

d) High resolution, <5μm pixel size.

e) High contrast ratio of 10,000: 1.

f) Consume significantly less energy.

g) Expensive. But sometimes has low cost materials and fabrication method (i.e.

Less Expensive than LCD due to lesser components).

h) Higher viewing angle up to 170 for constant contrast ratio.

i) Lifetime - While red and green OLED films have longer lifetimes (46,000 to

230,000 hours), blue organics currently have much shorter lifetimes (up to around

14,000 hours).

j) Organic Light Emitting Diodes are evolving as the next generation displays

OLED TV, Mobile phones with OLED screens and Roll top Laptop.

6 LED-backlight LCDa) Broad range of screen size.

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Page 7: LCD VS CRT VS LED VS PLASMA DISPLAY VS OLED VS LED-BACKLIGHT LCD

b) It is a flat panel display. Can be extremely slim (some screens are less than 0.5

inch (0.92 cm)) thin in edge-lit panels

c) Has good brightness.

d) Heightened contrast.

e) Has high resolution.

f) High native contrast ratio.

g) Consume significantly less energy.

h) with very good viewing angles 

i) LED-backlit LCDs have longer life than plasma and CCFL LCD TVs

j) The iPhone 5 has an LED-backlit TFT IPS LCD, while the Sony Xperia S is an

example of an LED-backlit TFT TN LCD (also referred as TFT LCD).

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