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Some people do not easily distinguish between LED backlights, LED displays, and OLED displays. In fact, LED backlighting refers to the use of LEDs (light-emitting diodes) as the backlight for liquid crystal displays, while LED-backlit displays are merely the backlights for LCD monitors from traditional CCFLs. Cold light tubes (like fluorescent lamps) go over to LEDs (light emitting diodes). The imaging principle of liquid crystals can be simply understood as follows: externally applying a voltage to deflect the liquid crystal molecules blocks the transparency of the light emitted by the backlight as a gate, and then projects the light into color filters of different colors to form an image.
Backlight module transition from CCFL to LED can bring many benefits, can make the display screen brightness more uniform, the product power consumption is lower, the appearance can be more light and thin fashion. However, W-LED (white LED) backlights are commonly used in the market. In fact, such backlights merely replace the light-emitting components, but the display effect is very weak or not even improved. The RGB-LED (tricolor LED), which has a significant improvement in the display effect of LCD products, has a significant improvement in the display effect, but at the same time, it has a higher production cost and is therefore applied to high-priced LCD TVs. At present, the LED display referred to by the merchant refers to a display product using a white LED backlight, and the difference from the ordinary liquid crystal display is the change of the backlight source.
LED display is a set of microelectronics, computer technology, information processing in one, with its colorful, dynamic range, high brightness, long life, stable and reliable, etc., has become the most dominant public display media, currently, LED The display screen has been widely used in large squares, commercial advertisements, sports venues, information dissemination, press releases, securities transactions, etc., and can meet the needs of different environments.
The LED display is a display mode that controls the semiconductor light-emitting diodes. Its approximate appearance is composed of a plurality of light-emitting diodes that are usually red, and the characters are displayed by the blinking of the light. Used to display text, graphics, images, animation, quotes, video, video signals and other information display screen.
The OLED display has the characteristics of self-luminescence, no backlight source, high contrast, thin thickness, wide viewing angle, fast response speed, flexible panel, wide operating temperature range, and simple structure and process. It is considered as the emerging application technology of the next-generation flat panel display.
OLED is the abbreviation of English Organic Light-Emitting Diode, translated as organic light emitting diode or organic light emitting display. In fact, this light-emitting principle was discovered as early as 1936, but it was not until 1987 that Kodak introduced an OLED double-layer device. OLEDs have attracted attention as a flat panel display technology that can be commercialized and has excellent performance. At present, there are more than 100 research institutions and companies in the world investing in OLED R&D and production, including display giants such as Samsung, LG, Philips, and Sony. On the whole, the industrialization of OLED has already begun. Monochromatic, multicolor and color devices have reached the level of mass production. Large-size full-color devices are still in the research and development stage, but the production capacity is still low.
Many netizens easily associate OLEDs with current LED backlights that are more popular with manufacturers. In fact, OLEDs and LED backlights are completely different display technologies. The OLED emits light by driving the organic thin film itself, and the emitted light may be monochromatic light such as red, green, blue, or white, which can also achieve full-color effects. So OLED is a new light-emitting principle that is different from CRT, LED and LCD technology.
The LED display is composed of LED dot matrix and LED PC panel. Texts, pictures, animations and videos are displayed through the flashing of red, blue, white and green LED lights. The contents can be replaced at any time. All components are modularized. Structured display device. Traditional LED display usually consists of display module, control system and power supply system. The display module is composed of a dot matrix composed of LED lights and is responsible for light-emitting display. The control system can display text, pictures, videos, etc. on the screen by controlling the on-off of corresponding areas. Monochrome and two-color screens are mainly used to play texts. Color LED display can not only play text, pictures, animation, but also can play video and other formats.
At present, the advantages of its wide audience, simple operation, long service life, and energy saving and environmental protection are widely used in all corners of the world today. In general, LED displays, LED backlights, and OLEDs are three completely different imaging technologies. 
