Lcd & led tv technologies
-
Upload
mohammad-ali-khan -
Category
Technology
-
view
169 -
download
12
Transcript of Lcd & led tv technologies
LCD & LED TV TechnologiesPresentation on
Department of Computer Science & EngineeringFaculty of Engineering
University of Development Alternative (UODA)
Submitted to
Md. Ashek Al AzizAssistant professor
Dept. of Computer Science & EngineeringFaculty of Engineering
University of Development Alternative (UODA)
Participants
Mohammad Ali KhanID: 011131035
Jakir HossainID:011131036
Sadia AfrinID: 011131016
Jafrin AkterID: 011131039
Contents• What’s Liquid Crystals (LC)• What’s Liquid Crystals Display (LCD)• Different types of LCDs• LCD Display Technology• Advantages & Disadvantages of LCD• Applications of LCD• What’s LED• Type of DRIVING LED• Some Types of LEDs• Advantages & Disadvantages of LED• Applications of LED• Difference Between LCD & LED
Liquid Crystals (LC)
What’s Liquid Crystals Display (LCD)
Different types of LCDs
There are Two type of LCDs available
1.Passive Matrix LCDs 2.Active Matrix LCDs
Active Matrix V/S Passive Matrix LCDs
Passive Matrix LCD Active Matrix LCD
• Allow very high resolution• It isn`t limited to about 50
rows• Each sub-pixel is individually
controlled by an isolated thin-film transistor (TFT).
• More use in Laptop & TV
• Allow high resolution• It is usually limited to about 50
rows• Each sub-pixel is not individually
controlled by an isolated thin-film transistor (TFT).
• Less use in Laptop & TV
LCD Display Technology• Technology Enhancements:
– Better color through corrected CCFLs, LEDs– Improved black levels (compensating films)– Higher contrast (pulsed backlights)– Wider viewing angles (compensating films)– Higher resolution (1920x1080)– Improved LC twist times
Advantages & Disadvantages of LCD
LCD Advantages Brightness Emissions Geometric Distortion Screen Shape
LCD Disadvantages Aspect Ratio Contrast Viewing Angle
Applications of LCD
Thin Film Transistor (TFT) Alpha-numeric displayBack lighting systemsFor brighter displays
Type of DRIVING LED
Two type of DRIVING LED
Analog LED Drive Circuits
Digital LED Drive Circuits
Some Types of LEDs
Bargraph 7-segment Starburst Dot matrix
Advantages & Disadvantages of LED
Advantages• It is very cheap.• Very simple electronic circuits.• It is reliable.• It is efficient• Life span : Around 100,000 hours• Screen size : Up to 90 inches
Disadvantages• Restriction to only 16 hexadecimal figures.• Low quality LEDs may cause pollution to environment.• May result in more e-wastes.
Applications of LED
Smartphone Tablet Pc Ebook Ultrabook/Notebook Video Camera Media Player Portable Game GPS Automotive LED TV Lighting Smart Metering
Difference Between LCD & LED
LED• Power Consumption is
less• Faster response rate
time • Sizes Available 17inches and 70inches. • Color Accuracy is less• Cannot be extremely
slim
LCD• Power Consumption is
more• Slower response rate
time • Sizes Available 15inches to 65 inches • Color Accuracy is more• Can be extremely slim