What is the difference between LED display and LED backlight display?

Oct 31, 2022, 2:52:19 AM

LED display is a luminous matrix composed of LED beads. However, due to the large diameter of the LED itself, the distance between pixels of the same color is also large, so LED display is usually only suitable for large screen display.


The LED backlight screen replaces the traditional backlight with LED lamp beads. The dot matrix type is mainly used for high-end models of various brands due to its uniform brightness, high contrast, natural color, high resolution and long service life; Although the brightness of the side light type is a little uneven (you may not see it if you don't look carefully), the cost is low, and it is mainly used for low-end models of various brands.


If the LED backlight display is a star created by many businesses, many manufacturers have stolen a concept when promoting their products. It is clearly that the LED backlight display is called LED display for short. In fact, what is the essential difference between LED display and LED backlight display? What is the difference between oled and led displays?

 

LED display


What is an LED display?


LED display manufacturers say that LED display refers to the display that directly uses LED (light emitting diode) as the pixel light emitting element, and the light emitting diode forming the array directly emits red, green and blue light, thus forming a color picture. However, due to the large diameter of the LED itself, the distance between pixels of the same color is also large (that is, we often say dot distance), so LED displays are usually only suitable for large screen display. At present, LED display has been widely used in large squares, commercial advertising, stadiums, information dissemination, news release, securities trading, etc., which can meet the needs of different environments.


LED display screen can display changing numbers, words, graphics and images. The reason why LED has been widely valued and rapidly developed is inseparable from its own advantages. It can be used not only in indoor environment but also in outdoor environment, and has incomparable advantages over projectors, TV walls and LCD screens. Moreover, LED display screen integrates microelectronics technology, computer technology and information processing. With its bright colors, wide dynamic range, high brightness, long life, stable and reliable operation, it has become the most advantageous public display media. The development prospect of LED is extremely broad. At present, LED is developing towards higher brightness, higher weather resistance, higher luminous density, higher luminous uniformity, reliability and full-color.

 

LED backlight display


What is an LED backlight?


We know that the LCD material itself does not emit light, and the light source on the back of the LCD panel is required to provide light support. In the past, this kind of light source has always been based on CCFL cold light tubes. The light emission principle of CCFL cold light tubes is similar to the fluorescent tubes we use daily. However, CCFL cold light tubes are also faced with problems such as uneven brightness, relatively high power consumption and mercury element. In contrast, LED backlights are better in terms of power consumption and environmental protection, brightness uniformity is relatively high and the volume can be made thinner. Therefore, the prospect of LED backlight is very promising by manufacturers. Let's review the basic principle of LCD.


In short, the LED backlight is the traditional CCFL backlight replaced by LED (light emitting diode, usually white). It is divided into dot matrix type (also called straight down type) and side light type. The dot matrix is mainly used for high-end models of various brands due to its uniform brightness, high contrast, natural color, high resolution and long service life; Although the brightness of the side light type is a little uneven (you may not see it if you don't look carefully), the cost is low, and it is mainly used for low-end models of various brands.


The transition of backlight module from CCFL to LED can bring many benefits. It can make the brightness of the display screen more uniform, the product has lower power consumption, and the appearance can be thinner and more fashionable. However, W-LED (white LED) backlight is widely used in the market at present. In fact, this backlight only replaces the luminous components, and the improvement of display effect is very weak or even not. The RGB LED (tri color LED), which has significantly improved the display effect of LCD products, has significantly improved the display effect, but at the same time, the production cost is high, so it is applied to high price LCD TVs.

 


This is a transparent LED display screen from a square in Shenzhen, China. The screen area is huge and the content displayed is very large. Do you lack such publicity? Then contact us immediately!


Advantages of LED display:


Luminous brightness is strong. When the sun shines directly on the screen surface within the visible distance, the display content is clearly visible. Super grayscale control. With 1024-4096 gray level control, the display color is above 16.7M, the color is clear and lifelike, and the stereo sense is strong. Static scanning technology. The static latch scanning mode and high-power drive are adopted to fully ensure the luminous brightness. Automatic brightness adjustment.

 

With automatic brightness adjustment function, you can get the best playback effect in different brightness environments. Fully adopt imported large-scale integrated circuits. The reliability is greatly improved, which is convenient for debugging and maintenance. Work around the clock. It can fully adapt to various harsh outdoor environments, such as anti-corrosion, waterproof, moisture-proof, lightning protection, and seismic, with strong overall performance, high cost performance, and good display performance. Pixel cartridges can be P10mm, P16mm and other specifications. Advanced digital video processing. Distributed scanning technology, modular design, constant current static drive, automatic brightness adjustment. Super bright solid color pixel. The advantages of clear image, no jitter and ghosting, and no distortion can be summarized as: long life, low power consumption, miniaturization, impact resistance, high brightness, low operating voltage, and stable performance.


Advantages of LED backlight


Due to the low power consumption of LED due to the use of single point lighting, and the advantages of long life, short size, light hail and environmental protection, LED has gradually replaced CCFL and is widely used in small and medium size panels and backlights. In the future, LED will gradually move towards the backlight field of large size panels such as LCD displays, laptops, LCD TVs, etc. In addition, as the color saturation of LED can reach nearly 100%, it is far superior to the performance level of CCFL, which is generally 70%~85%. In particular, since LED drive is much faster than CCFL, CCFL drive takes 1s to 2s, while LED only takes 50ns, so LED can be used as backlight by using ColorFilter less technology.


In general, LED display and LED backlight display are two completely different imaging technologies. At present, those square large screens use LED panels, which directly emit light of different colors. But you can also see that the pixel point and the point spacing are large. The current technology cannot be smaller, so it is only used for large screens. However, the long life, low energy consumption, color saturation, and reality are the future development trends. The LED backlight display replaces the original CCFL (cold light source similar to fluorescent lamp) behind the LCD with LED, which does not greatly improve the color, but has many advantages, such as higher and thinner screen brightness, more uniform brightness, lower energy consumption, etc. Therefore, the LED backlight display commonly seen in the market is not actually a replacement of display technology, but a replacement of an original.


Therefore, the LED backlight display commonly seen in the market at present is not actually a replacement of display technology, but a replacement of an original. It is also incorrect to confuse LED backlight with LED. LED backlight is better than ordinary LCD, and LED backlight is better than LED backlight.

whatsapp