A brief analysis of the difference between LED backlight, LED display and OLED display

- May 27, 2019-

LED backlight refers to the use of LED (light-emitting diode) as the backlight of the liquid crystal display (LCD), and LED backlight display is just the backlight of the liquid crystal display (LCD) from the traditional CCFL cold light (similar to fluorescent light) to the LED (light-emitting diode). The imaging principle of liquid crystals can be simply understood as that the molecular deflection of liquid crystals caused by external voltage ACTS as a gate to block the transparency of the light emitted by the backlight source, and then the light is projected onto the color filter plates of different colors to form an image.


The transition of the backlight module from CCFL to LED can bring a lot of benefits, such as more uniform brightness of the display screen, lower power consumption of the product, thinner and more fashionable appearance. However, w-led (white LED) backlight is widely used in the market at present. In fact, this backlight only replaces the luminous components, and the improvement of display effect is very weak or even not improved. Rgb-led (three-color LED), which can improve the display effect of liquid crystal products significantly, but at the same time has a high production cost, so it is used in high-priced LCD TVS. At present, the LED display mentioned by businesses refers to the display products with white LED backlight, and the difference between ordinary LCD is the change of backlight source.


LED display is set microelectronics technology, computer technology and information processing in one, with its colorful, wide dynamic range, high brightness, long life, stable and reliable work, become the most advantage of the public display media, at present, the LED display has been widely used in large square, commercial advertising, sports venues, information dissemination, news release, securities trading, etc., can satisfy the needs of different environment.


LED display is a kind of display mode by controlling semiconductor light-emitting diode, which roughly looks like is composed of many usually red light-emitting diodes, depending on the light on and off to display characters. A display screen used to display text, graphics, images, animation, quotes, video, video signals and other information.


OLED display is considered to be the next generation of emerging application technology of plane display because of its excellent characteristics such as self-illumination, no need for backlight, high contrast, thin thickness, wide viewing Angle, quick response, applicable to flexible panel, wide range of application temperature, simple construction and manufacturing process, etc.


OLED stands for organic light-emitting diode (OLED). In fact, this luminescence principle was discovered as early as 1936, but it was not until kodak company launched OLED two-layer device in 1987 that OLED attracted people's attention as a kind of commerciable and excellent flat panel display technology. At present, there are more than 100 research units and enterprises engaged in OLED research and development and production, including the current display giants in the market, such as samsung, LG, philips, SONY and other companies. On the whole, the industrialization of OLED has started, among which monochrome, polychromatic and color devices have reached the level of mass production, and large-size full-color devices are still in the research and development stage, but their productivity is still low.


Many netizens tend to associate OLED with LED backlight, which is much hyped by manufacturers. In fact, OLED and LED backlight are totally different display technologies. OLED light-emitting diodes (oleds) emit light in red, green, blue and white monochrome or full-color by driving the organic film itself with an electric current. So OLED is a different CRT,LED and LCD technology of a new luminous principle.


LED display is composed of LED dot matrix and LEDPC panel, through the red, blue, white, green LED light off to display text, pictures, animation, video, content can be changed at any time, each component is a modular structure of the display device. Traditional LED display is usually composed of display module, control system and power supply system. The display module is composed of a lattice composed of LED lights and is responsible for luminous display. The control system can make the screen display text, picture, video and other contents by controlling the light and off of the corresponding area. Monochrome and two-color screen are mainly used to play text. Full-color LED screen can not only play text, picture, animation, but also play video and other formats.


At present, it is widely used in every corner of the world for its wide audience, simple operation, long service life, energy saving and environmental protection. In general, LED display, LED backlight and OLED are three totally different imaging technologies.