LCD: Various LCD screens: Backlight source lighting + LCD color display, the backlight source now uses LED lights
QD-LCD: Quantum Dot TVs: Generally, the screen of LCD TVs is illuminated by blue light from LED backlights, which is converted into red, green, and blue colors through phosphors, ultimately forming white light, which is then displayed on the LCD, resulting in color display. QD-LCD uses quantum dots instead of phosphors, allowing better color gamut and brightness when blue light from LEDs hits the quantum dot film, producing better red and green light, which together with blue light is displayed on the LCD, resulting in better display effects for QD-LCD screens.
Mini-LED: Soon to be commercialized?: This is an enhancement technology for existing LCD display technology, using smaller LED lights as backlight sources. Therefore, it can control the image more precisely. Currently, edge-lit backlight designs only need dozens of high-brightness LEDs, while miniLED requires tens of thousands of small LEDs.
LED: Self-luminous and color display after powered, the light-emitting materials are GaAs(Gallium Arsenide), GaP(Gallium Phosphide), GaAsP(Gallium Arsenide Phosphide), etc.
MicroLED: Apple is very interested in this technology and plans to commercialize it: MicroLEDs are very small light-emitting diodes, with LED units smaller than 100 microns. Each LED contains red, green, and blue subpixels. MicroLED technology uses inorganic materials to achieve the light-emitting effect. LEDs can only be made into large screens outside sports venues, and clearly, their resolution is insufficient for televisions, while MicroLED can be made small enough, down to the size suitable for televisions, watches, and other screens. In early January this year, Samsung Electronics launched the world’s first 146-inch modular “The Wall” television, which uses MicroLED screens, and is said to be available for sale in August.
OLED: Commercialized: Self-luminous and color display after powered, the light-emitting and color display materials are organic molecular polymers.
QLED: Concept stage: Self-luminous and color display after powered, the light-emitting material is quantum dots, which are inorganic semiconductor nanocrystals, usually composed of zinc, cadmium, selenium, and sulfur atoms.
1. LCD (Liquid Crystal Display) consists of placing liquid crystals between two parallel glass sheets, with many vertical and horizontal fine wires between the two sheets, controlling the orientation of rod-like crystal molecules by whether electricity is applied, refracting light to create images.
LCDs do not emit light by themselves, requiring a backlight source. They are made by bonding a TFT substrate and a CF (color film) substrate, filled with liquid crystals.
Through the electric field provided by the TFT substrate, the angle of rotation of the liquid crystals is controlled, thus regulating the transmittance of the liquid crystals. The color film is printed with RGB color blocks, and the light from the backlight passes through the transparent TFT substrate, through the liquid crystal molecules, and then through the CF substrate.
2. What does LED mean?
LED = Light Emitting Diode, a solid-state semiconductor device that can convert electrical energy into visible light, which can directly convert electricity into light. LED applications can be divided into two main categories: one is LED displays; the other is LED single-tube applications, including backlight LEDs, infrared LEDs, etc..
LED displays are composed of arranged light-emitting diodes. They use low-voltage scanning drive, characterized by low power consumption, long service life, low cost, high brightness, few failures, wide viewing angles, and long visible distances.
3. OLED is Organic Light Emitting Diode, a self-luminous device, which does not require a backlight source, as it emits light and displays colors by itself, effectively replacing LCDs.
4. Mini-LED:
Mini-LED refers to sub-millimeter light-emitting diodes (Mini LED). Mini LED technology transforms the side-lit backlight source of dozens of LED beads, into thousands or tens of thousands of direct-lit backlight sources.
5. QD-LCD:
Quantum dots are inorganic semiconductor nanocrystals, usually composed of zinc, cadmium, selenium, and sulfur atoms.
QD-LCD technology is an improvement on LCD display technology, essentially still an LCD display technology under backlight sources.
6. Micro-LED:
Micro-LED is a small version of outdoor LED billboards, integrating individual LED lights onto semiconductor chips, forming high-density micro-sized LED arrays.
Due to the self-luminous nature of Micro LED technology, its advantages include low power consumption, high brightness, ultra-high resolution and color saturation, fast response speed, low power consumption, long lifespan, and high efficiency.
In production technology, Micro LED Display combines the characteristics of both TFT-LCD and LED technologies.
OLED technology encompasses various key technologies, including TFT technology, colorization technology, organic film formation technology, and device packaging technology.
In summary, the development trend of OLED technology is to solve the current technical issues faced by industrialization and to overcome the bottlenecks that align with product development.
Source: AIOT Big Data
Disclaimer: This article is an excerpt or reprint from the internet, copyright belongs to the original author, and the content reflects the author’s personal views, not representing this public account’s agreement with their views or responsibility for their authenticity.
