What Is The Difference Between LED and LCD

Posted on August 8, 2020.

What is the difference between LED and LCD is the question we often hear dealing with the use of monitor either for computer or for television. LED and LCD come with the different acronym. They are a bit confusing their hardly similar words. They are coming up again and again when it comes for you to choose a television or a computer monitor.

Perhaps, you have been familiar with the two terms but you haven’t understood what the difference between the two. Now I am sure that you are wondering about LED and LCD used in the screen. Both LED and LCD use LCD technology to support backlighting. Old LCD TV screen used Cold Cathode Fluorescent Lamps (CCFLs) to support backlighting; meanwhile, LED TV screen makes use an array of smaller Light-Emitting Diodes (LED) to illuminate the screen.

To know more about it, here’s how it works.


In spite of the different acronym distinguishing LED from LCD, however, an LED screen is just a specific type of LCD screen. Both types of the screen use LCD to support backlighting which is displayed on the screen. These panels are generally consisting of two sheets of polarizing substance with a liquid crystal solution. It works when an electric current passes through the liquid, the crystal align the light to pass through the liquid too.

What is the difference between LED and LCD lies on the three different forms of illumination used in LCD screen. Those are CCFL backlighting, Full-array LED backlighting and LED edge lighting.

CCFL backlighting is cheaper that the other forms of illumination used in the inside of the TV behind the LCD display. All the pictures will have such similar brightness level as a result of the lights illumination towards the crystal evenly. This aspect much influences the picture quality.

Full-array backlighting tends to swaps the outdated CCFLs for LEDs. It is placed in the back of LCD screen. This can create better pictures than CCLFs LCD TV.

Edge lighting is another form of LCD screen illumination. It edge-lits TVs with LEDs along the edges of the screen. This is good for pictures brightness capability so that the pictures quality is getting enhanced.

Local Dimming

Local dimming is a feature of LED LCD screen in which the LED light source behind the LCD is dimmed and illuminated to match based on the picture demands. LCD is not able to completely prevent light from passing through in the darkness of the scenes so that it dims the light source to create impressive contrast in the picture. On the other hand, LED is intended to have been dark. This is where the difference of LED and LCD lay.


As confusing as LED and LCD, OLED and QLED also come with the aim of confusing you too. It sounds funny, however, you need to know about the two. You will find OLED displays on high-end TVs in place of LEDs, but it means that LEDs is still with their own premium technology.

On the other hand, QLED is a premium tier of LED LCD derived from Samsung. Its feature can update illumination technology over the regular LED LCD. That’s why QLED is more efficient.


Overall, LED and LCD which has quite similar sounding differ only a little bit in the way they are supporting the backlight. What is the difference between LED and LCD is not uncommon question to find out the answer. It is necessary to know both of them only when you are going to own a television or a computer monitor.

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