Source: Tiger Says Chip
Original Author: Tiger Says Chip
This article provides a clear and understandable introduction to the concepts and applications of LCD, LED, Mini LED, and Micro LED.1. LCD (Liquid Crystal Display)LCD, or Liquid Crystal Display, can be imagined as a complex “curtain system”. In this system, the backlight acts like sunlight, and the liquid crystal layer functions like curtains. When an electric current passes through the liquid crystals, they rotate to control the amount of light that passes through, thereby regulating the brightness and color of each pixel on the screen. Since it requires an external light source (backlight), it is akin to curtains that cannot emit light on their own but can only adjust the sunlight that comes through. The main challenge of LCDs is their relatively low contrast, as some light still leaks in even when the curtains are closed.2. LED (Light Emitting Diode) BacklightWhen discussing LED in display technology, we typically refer to LED backlit LCDs, which means it uses LEDs as the backlight source to illuminate the liquid crystal layer. Compared to traditional fluorescent backlights, LEDs can provide a more uniform and efficient light source, and they allow for finer control of localized bright areas, enhancing the display’s contrast and color range.3. Mini LED BacklightMini LED technology can be seen as an evolution of LED technology. If the LED backlight system uses a set of larger lights to illuminate the entire window, Mini LED uses hundreds or thousands of small bulbs to achieve the same effect, with each small bulb being individually controllable for brightness. This means that in dark scenes, some bulbs can be completely turned off, resulting in deeper blacks and higher contrast. The high local dimming capability of Mini LED makes it excel in displaying deep blacks and high-contrast scenes.4. Micro LEDMicro LED is a revolutionary display technology that can be imagined as each pane of window glass being able to emit light on its own, without needing sunlight or curtains. Each Micro LED element is a tiny light-emitting diode that can independently control color and brightness. This means Micro LED displays can offer very high contrast, excellent color performance, and extremely low power consumption. Additionally, Micro LED does not require a backlight layer, allowing devices to be thinner and lighter. However, due to the complexity of production technology, this technology is still in the research and gradual commercialization stage.5. ApplicationsLCD: Widely used in screens for televisions, monitors, and portable devices due to lower costs and mature technology.LED Backlit LCD: Offers better brightness and color than standard LCDs, commonly found in high-end televisions and monitors.Mini LED Backlight: Suitable for high-end televisions and professional monitors that require high contrast and high dynamic range (HDR) performance.Micro LED: Due to its superior performance, it is very suitable for future high-end wearable devices, smartwatches, and virtual reality devices (AR/VR).Each technology has its unique advantages and limitations, and the choice of the most suitable technology depends on specific application needs and budget.
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The reproduced content only represents the author’s views
It does not represent the position of the Institute of Semiconductors, Chinese Academy of Sciences
Editor: Silence
Responsible Editor: Muxin
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