Question

Are MicroLED displays made of self-emissive pixels?

MicroLED, like OLED, has each pixel emitting its own light. The difference is that it uses inorganic materials, such as 1080P with 3 pixels (1080*1920). Or is it simply backlit by individual pixels, with each pixel having its own backlight, and then, like LCD, with 1080P and 1080*1920 backlights, the white backlight is polarized to display the desired color using a polarizer.

Answer 1

Yes.

Micro-LED displays utilize micrometer-sized (typically less than 50µm) inorganic LED devices as light-emitting pixels to achieve an active-matrix display. From a display technology perspective, MicroLED and Organic Light Emitting Diodes (OLEDs) both belong to active-matrix display technologies.

Traditional LEDs and mini LEDs are used as backlights, either white or blue. Then,

white LEDs directly illuminate the liquid crystal layer and color filter layer (ordinary LCD TVs),

or blue LEDs illuminate a quantum dot film to form white light, which then illuminates the liquid crystal layer and color filter layer (QLED TVs), with color also achieved through the color filter layer.

As backlights, a few thousand is considered a large number.

MicroLEDs, on the other hand, have each pixel consisting of three microLEDs of different colors that directly mix and emit light. This means each pixel requires one microLED, totaling 24.88 million microLEDs.

Answer 2

Yes.

Like OLED technology, MicroLED's biggest advantage is its self-emissive pixel-based emission technology. This means each pixel can be divided into units, easily achieving a contrast ratio of millions. MicroLED technology shrinks the LEDs we currently see to less than 100 micrometers in length, only 1% of the original LED, smaller than a grain of sand.

Through mass transfer technology, micrometer-scale RGB three-color MicroLEDs are transferred onto a substrate to form MicroLED displays of various sizes. Because MicroLED chips are so small that they are indistinguishable to the naked eye, the R, G, and B primary color chips can be directly combined into a single pixel, becoming the concept of "one pixel."

There is no need for color filters and liquid crystal layers. This technological characteristic, completely different from the light-emitting structure of traditional LCD displays, will bring a new revolution to the LCD industry.

MicroLED technology is a new type of display technology. Compared to traditional display technologies such as LCD and OLED, it has the following advantages:

Superior display effect: MicroLED displays can achieve higher brightness, higher contrast, and a wider color gamut, all of which contribute to improved display effects. MicroLED displays also offer faster response times and higher refresh rates, meaning they can better display fast-moving images, such as video games or sports events.

Longer lifespan: Because MicroLED displays use LED chips, which typically have a longer lifespan than the fluorescent tubes or OLED chips used in traditional displays, MicroLED displays can boast a longer lifespan.

Lower energy consumption: MicroLED displays use the same light-emitting principle as LED chips, controlling the brightness of each pixel to achieve display, and can selectively turn off certain pixels, thus reducing energy consumption.

Higher stability: The LED chips in MicroLED displays are individually controlled, meaning that if a pixel malfunctions, only that pixel needs to be replaced, rather than the entire display.

Thinner and more flexible: The LED chips in MicroLED displays are extremely small, typically only a few micrometers in size. This means that thinner and lighter displays can be manufactured, and more flexible manufacturing processes can be used, such as flexible and rollable displays.

Besides promising to create a new landscape for the LCD industry, Micro LED has a wide range of applications in the future, including AR/VR devices, automotive screens, and high-resolution wearable products.

Answer 3

Micro LED displays essentially store three colored LEDs (blue, green, and red) within each pixel. By controlling the intensity of these three colors, they are mixed to create all colors of light. Being self-emissive, they do not require an external light source. Furthermore, the small size of Micro LEDs allows for very high resolution. The only drawback is the difficulty in controlling the yield rate during the production of such a large number of LEDs, which is currently the main bottleneck for mass production.