Advancements in LED backlight: MINI-LED, and Micro-LED

By Sean Wong

With the increasing popularity of MINI LED backlight technology in the market, various brand display manufacturers have also made efforts to MINI LED displays this year. Faced with MINI LED display screen products ranging from 10000 to 3000 yuan on the market, consumers always have the question: How much difference will products at different prices have? To what extent will MINI LED backlight technology enhance the viewing experience?

Today, we will use this article to discuss MINI LED backlight technology in detail and help you solve some doubts about this technology.

1. The birth and principle of  MINI LED

The birth and principle of  MINI LED are influenced by many factors like price, and OLED screens have influence on MINI LED.The display devices we use in daily life, such as mobile phones, televisions, and monitors, still rely mainly on LCD screens. The fundamental reason why LCD screens can display images is the presence of a light source. Its light source is the backlight layer.

Because the backlight layer is a module composing of many LED beads that can emit white light. Therefore, the number of LED beads will have a crucial impact on the maximum brightness and uniformity of the screen. When the number of light beads in traditional LED backlight modules cannot meet everyone’s requirements for image quality and industry applications, it will inevitably be replaced by new backlight technology, and MINI LED backlight technology has emerged.

Schematic diagram of MINI LCD structure

From the name MINI LED, we can see that the implementation principle of this technology is to reduce the size of LED beads, so that the panel can accommodate more beads while maintaining the same area, thereby achieving high brightness display impact. With the progress of backlight technology, the standard size of MINI LED crystal is gradually reduced from 100 μ m to 200 μ m to 50 μ m to 200 μ m, making the screen brightness jump from hundreds of nits to thousands of nits.

The increase in the number of lamp beads has also given rise to Local dimming technology. It refers to dividing the entire backlight source into multiple independent control areas. LED chips control the brightness of individual area light beads to achieve higher contrast. In addition, due to the fact that MINI LED backlight panels mostly adopt a straight down backlight design, local dimming technology can also effectively improve the long-standing light leakage problem of LCD screens.

2. The application of MINI LED

The application of MINI LED in various industries can be mainly divided into two methods: direct display and backlighting based on the application scenarios of MINI LED.

The direct display adopts RGB three primary color LED module, making MINI LED use light beads as pixels directly to complete the screen display, just like OLED. However, this method has something difficult to do with the immaturity and high cost of small-scale screen technology. At present, the commercial and professional display fields use it. It will take some time for it to be popular in the civilian field.

Therefore, the application of MINI LED in the backlight field has naturally become the focus of attention for various panel manufacturers. Since the birth of the MINI LED concept, many panel manufacturers at home and abroad, including Samsung, LG, TCL and BOE Technology, have actively developed this technology, and have realized a comprehensive layout in the display fields of television, display, mobile phones and so on.

3. MINI LED backlight is the earliest and most mature technology in the television field

Due to its high brightness, high contrast, and other characteristics that enhance image quality. TVs with MINI LED backlight technology have achieved excellent market performance once launched.

However, in the field of mobile phones, which using MINI LED as the backlight. It has a disadvantage in image performance compared to OLED screens. In addition, mobile phone users generally have short product replacement cycles and are unable to fully utilize their good durability. This results in certain limitations in the application of MINI LED backlight technology on mobile phone screens.

In recent years, with the miniaturization of LED beads, the application scenarios of MINI LED backlight have gradually shifted. It transforms from televisions suitable for long-distance viewing to display fields more suitable for close range viewing. Moreover, a highly representative product launch out every year. After several years of technological precipitation. MINI LED display screens have officially experienced a comprehensive explosive growth. This year, the number of new products and market sales grows gradually.

FAQ: What do you think of the development prospects of MINI LED?

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