what is the difference between LED and LCD?
Answers
LED
display contains pn junction semiconductor diodes that pass current in one
direction only. LED and LCD both are
variants of liquid crystal displays.
LEDs are a subset of LCDs.
LCD (liquid crystal display) screen has the actual display and behind it a light source called the backlight. A light diffuser is provided between the two to spread light equally among all diodes on the screen.
Both LCD and LED (light emitting diode) TVs use the same technology, two layers of polarized glass through which the liquid crystal diodes either pass light or block it. LCDs used CCFL type of backlight. But LED TVs use LED backlight source. This is more advanced and so LED has phased out the LCD TV technology. LCD TVs use fluorescent lights and LED TV uses light emitting diodes.
The lights are placed behind the screen in LCD TV. In LED that could be placed either near the corners or behind the screen. So the LED screens can be thinner than LCDs if the lights are placed around the corners or along the edges.
LED TVs are more energy efficient because they provide more energetic and more quantity of light. They provide clear and higher quality picture. The contrast between colors of the neighboring LCDs is better seen in LED TVs. This can be done by use of local dimming technology. The size reduction (thinness) of LED TV is due to the smaller size of LED compared to CCFL tubes that give out fluorescent light.
LED TVs are costlier than LCD TVs. Both displays need to be kept away from water. The LED, LCD displays are used in smart phones, video cameras, TVs and also in domestic lighting, laptops.
Answer:
hi jaahamaaksbsdhzhehsuhsklqqjagwiqmk