The difference between LCD screen and LED screen
Blaze Display Technology Co., Ltd. | Updated: Nov 27, 2018
There are obvious differences in display technology between LCD screens and LED screens. LCD screens use the physical properties of liquid crystals to display images, while LED screens use light-emitting diodes as display units. These differences make the two screens different in terms of display effect, power consumption and reliability.
A: Main differences:
1. Display principle
LCD screens utilize the physical properties of liquid crystals to display images. When a voltage is applied, the liquid crystal molecules align in a straight line, making it impossible for light to pass through; when the voltage is removed, the liquid crystal molecules spread out, allowing light to pass through. In this way, the image can be displayed under the illumination of the backlight.
LED screens use light-emitting diodes as display units. Each light-emitting diode is responsible for generating light at a pixel, and an image is formed by controlling the on/off state of the diode.
2. Color expression
Because the LCD screen uses backlighting, the colors tend to be more realistic and natural, and the color gamut range is also relatively wide. However, since the liquid crystal layer itself does not emit light, it needs to rely on a backlight, which results in less deep blacks and lower contrast.
The color performance of the LED screen is more vivid and the contrast is higher. This is because each pixel of the LED screen can be controlled independently, making blacks purer and colors more vivid. However, the color gamut range of LED screens is relatively narrow.
3. Brightness
The brightness of LCD screens is usually low, usually around 300cd/m². This is mainly because the liquid crystal layer itself does not emit light and can only rely on backlight.
The brightness of LED screens is relatively high, reaching more than 1000cd/m². This is because each pixel of the LED screen can be controlled independently, and the brightness of the light-emitting diodes can be adjusted.
B. Application scenarios
LCD screens and LED screens each have their own advantages, so their application scenarios are also different.
1. Due to its natural and true color performance and low power consumption, LCD screens are suitable for applications with high color requirements, such as televisions, computer monitors, etc. In addition, because the price of LCD screens is relatively low, they are also suitable for use in price-sensitive occasions, such as mobile phones, tablets, etc.
2. Because of its high brightness and high contrast, LED screens are suitable for use in situations that require long-distance viewing, such as outdoor billboards and station signs, as well as situations that require high definition and high contrast, such as high-definition TVs, commercial displays, etc. .
C. Maintenance
The maintenance methods of LCD screens and LED screens are also different.
1. LCD screen
Cleaning the LCD screen is relatively simple, just wipe it gently with a dry cloth. But be careful not to scratch the screen surface with hard objects to avoid scratches. Additionally, if you are using a touch screen, you can use touch screen cleaner or a damp cloth to clean the screen surface and fingerprints.
2. LED screen
Cleaning the LED screen is similar to the LCD screen. It is also wiped gently with a dry cloth. But be careful not to scratch the screen surface with hard objects to avoid damage. In addition, the brightness of the LED screen can be adjusted through software and can be adjusted according to different usage environments.
LCD screens and LED screens each have their own advantages and disadvantages, and have different applicability in different application scenarios. When choosing, you need to choose based on actual needs. At the same time, correct maintenance methods can also extend the service life of the screen. Whether it is LCD or LED, they are powerful assistants in our lives, helping us better enjoy the convenience and fun brought by digital life.