LED and LCD TV PPT Document_from_Aditya_Vishwakarma.pptx

It is LCD and LED TV all components and working principle of the Conventional vs modern Television
It is comes in consumer electronics

1. Sources of this Presentation:- YouTube Channels:- Engineering Adda (Contents) Engineering Factory (Visual Presentation) Webpages Wikipedia & some others First I would like to pay my sincere Thanks to:- Vinod Kumar Sharma (T.O. EM NSTI Kanpur) &All Electronics Mechanic Students

2. LCD TV:-

3. Advantages of LCD TV The LCD can be made in large sizes of over 60 inch or 150 cm diagonal. It has excellent contrast. It is very compact, thin, and light compare to CRT displays. It does not affect by the magnetic fields. Due to low power consumption, small heat emitted during operation. It is much thinner than a CRT (cathode ray tube) monitor. Low cost.

4. Disadvantages of LCD TV Required additional light source. Low speed. It needs AC drive. Limited range of temperature for operation. In high temperature environments there is loss of contrast. It is relatively bright but not suitable for very brightly environments. It consumed a lot of electricity which produce a lot of heat. It has individual liquid crystals which cannot complete all block of the backlight. From the viewing angle, the color and contrast not consistent.

5. LED TV:-

6. Advantages of LED TV Sharper Picture More energy efficient Use about 40% less electricity than a standard LCD TVs. LED Backlighting system has no delay or warm up time. Much thinner than a traditional LCD or Plasma TV. Easier to mount on walls or hang from ceilings. LED TV shows contrast Similar to a Plasma TV. Are better than a LCD TVs. Longer life.

7. Disadvantages of LED TV Required additional light source. Limited range of temperature for operation. Little motion blur.

8. Comparison between LCD TV and LED TV Picture Quality Even though some say the picture quality of an LED TV is better, there is no straight answer for which has better picture quality since both TVs use the same kind of screen. For instance, a higher-end LCD TV can have a better quality than a low-end LED TV, but if you look at high-end models of either TV, the picture quality will be comparable. 2 . Colors An LED TV offers more colors, especially ones that use RGB-LED backlighting.

9. Comparison between LCD TV and LED TV 3 . Dynamic contrast RGB Dynamic LEDs show truer blacks and whites and thus get higher dynamic contrast ratio (which is desirable in a TV) than a LCD TV. 4. Slim frame Edge-LED backlighting technique allows an LCD TV to be extremely thin. LED televisions that are only 1 inch thick are also available.

10. Comparison between LCD TV and LED TV 5. Power Consumption LED TVs use energy-efficient light emitting diodes (LED) for backlighting. These consume less power than cold cathode fluorescent lamps (CCFL) used in traditional LCD televisions. Power savings are typically 20-30%. 6. Price On average, LED TVs are priced higher than traditional LCD TVs that use CCFLs for backlighting.

11. The basic composition of LCD / LED TV The composition of LCD/LED TV is generally LCD screen, chassis, motherboard, power board, remote receiving board, keypad, horn, 120Hz transfer board, backlight board (high pressure board) remote control, all connection lines.

12. 1. Motherboard components The mother (main) board component is the core part of signal processing in LCD TV, which is responsible for converting the external input signal into the digital signal recognized by the unified LCD under the action of the system control circuit. Input interfaces generally include: RF(TV TV) radio frequency signal, CVBS(AV) composite VIDEO signal, S-Video (S terminal), YPBPR component VIDEO, VGA(PC computer), HDMI, USB, CI card output interface: Headset, Coaxial(axial), extensible: DVD

13. 1. Motherboard components

14. 2. Power components The power supply module is the power supply, the function is to convert 220V(90V-260V) mains power into a stable DC voltage, used for the whole other circuits (main board, backlit board, high pressure board, etc.) working voltage. Liquid crystal power supply usually has +5V, +12V, +24V voltage output The relationship between the power board and the motherboard is one that is independent and controlled by the motherboard.

15. 2. Power components

16. 3. Key board component The key board assembly generally consists of seven functional keys. The user can operate the LCD TV conveniently through this component

17. 4. Remote receiver BOARD (IR BOARD) The remote receiving board assembly consists of a working indicator light and a remote receiving head. The user can operate the LCD TV conveniently and know the status of the LCD TV by using the remote control.

18. 5. Speaker assembly (speaker) The function of a loudspeaker is to convert electrical signals into sound. The television usually uses a paper basin speaker. The paper basin loudspeaker is composed of: permanent magnet, bracket, centering piece, copper wire voice coil, diaphragm folding ring cone type paper basin. Full-tone speakers (wideband speakers) are generally used on TV sets, with F0=150Hz to 20KHz. Speakers with 8-euro 10W to 8-euro 15W power are generally used.

19. 6. 120Hz transfer plate The function of 120Hz transfer board is to convert the 60Hz signal given by the main board into 120Hz signal.

20. 7. Screen The main purpose of the screen is to display the picture. Other components, LCD, diffusion film, light collector (prism), diffusion plate, light source body, reflective film).

21. 8. Backlight CCFL backlight

22. 8. Backlight LED backlight

23. 8. Backlight LED backlight

24. Backlight LED Tester

25. R G B Dynamic LED Backlighting

26. The End Thank You All