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2 March 2019

Difference between LCD and LED

The main difference between the LCD and LED is that display LED consumes less power and is the best for picture quality when compared with the LCD  display, This post gives the main key difference between LCD and LED for a better understanding of this topic.

LCD :
  • LCD stands for liquid crystal display.
  • LCD consumes less power. 
  • LCD can be driven directly from IC chips. Driver circuits are not required.
  • LCD has a moderate brightness level.
  • Comparatively less temperature limit. The temperature range is limited to -20 to 60 degrees Celsius.
  • Due to chemical degradation, the lifetime is 50000 hours.
  • The viewing angle for LCD is 100 degrees.
  • The operating voltage range is 3 to 20 VDC.
  • LCD is less expensive than LED. If you want to compromise a bit with the quality you can go for an LCD.
LED:
  • LED stands for a light-emitting diode.
  • LED consumes more power than LCD.
  • Due to the high power requirement, LEDs require an external interface circuit when driven from ICs.
  • The brightness level is very good for LEDs.
  • Lifetime is around 100000 hours.
  • Commercially available LEDs have an operating temperature range of -40 to 85-degree Celsius
  • LED has a wide viewing angle.
  • Operating voltage range 1.5 V to 5 VDC.
  • If you are going to purchase LED, it's more expensive than LCD but has the quality of picture and better features than LCD.

 A key difference between LCD and LED:

Here we will discuss the main difference between LCD and LED, specifically in reference to TVs based on the technology, picture quality, contrast ratio, resolution, viewing angle, etc.

  • LCD stands for liquid crystal display while LED stands for the light-emitting diode.
  • The cost of the LED is more than LCD.
  • The resolution of LED is much better than that of LCD.
  • The LED is a PN junction diode that emits visible when the forward bias applies across it while in LCD uses liquid filaments that are filled between glass electrodes for the emission of light.
  • The direct current reduces the life span of LCD while LED has no effect on it.
  • The switching time of the LED is less than LCD.
  • The LCD uses mercury which pollutes the environment whereas the LED does not use mercury.
  • LED is a faster response time compared to LCD.
  • The display area of the LED is less compared to the LCD.
  • The LED comes with a wider viewing angle than the LCD.
  • LED display gives good quality than LCD.
  • LED provides better colour accuracy than LCD.
  • The LED consumes more power as compared to the LCD.
  • The LED uses gallium arsenides which when heated emit light whereas LCD uses a liquid crystal which is energized and provides light.
  • LCD is not good to create black areas hence not good have contrast as LED while LED has better contrast and black level as it produces better black areas which gives a better quality image.
  • The LCD uses a cold cathode fluorescent lamp which provides the backlight of the screen whereas the LED uses the P-N junction diodes for displaying the light.
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