source:other news release time:2022-11-17 Hits: Popular:led screen wholesaler
1、 LED backlight
LED backlight refers to the use of LED (light emitting diode) as the backlight of LCD, while LED backlight display is the transition of backlight source of LCD from traditional CCFL cold light tube (similar to fluorescent lamp) to LED (light emitting diode).
The imaging principle of liquid crystal can be simply understood as that the external voltage applied to deflect the liquid crystal molecules will block the transparency of the light emitted by the backlight like a gate, and then cast the light into color filters of different colors to form images.
LED backlight display
The transition of backlight module from CCFL to LED can bring many benefits. It can make the brightness of the display screen more uniform, the product has lower power consumption, and the appearance can be thinner and more fashionable. 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.
The RGB LED (tri color LED), which has significantly improved the display effect of LCD products, has significantly improved the display effect, but at the same time, the production cost is high, so it is applied to high price LCD TVs. At present, the LED display referred to by the business refers to the display product with white LED backlight. The difference between the LED display and the ordinary LCD display is the change of backlight.
2、 LED display
LED display is a combination of microelectronic technology, computer technology and information processing. With its bright colors, wide dynamic range, high brightness, long life, stable and reliable operation, it has become the most advantageous public display media. At present, LED display has been widely used in large squares, commercial advertising, stadiums, information dissemination, news release, securities trading, etc., which can meet the needs of different environments.
LED display is a display mode by controlling semiconductor light-emitting diodes. It is generally composed of many usually red light-emitting diodes. Characters are displayed by turning on and off the lights. Display screen used to display text, graphics, images, animation, market, video, video signals and other information. The OLED display screen is considered as the new application technology of the next generation of flat panel display because it simultaneously has the advantages of self illumination, no backlight, high contrast, thin thickness, wide viewing angle, fast reaction speed, flexible panel, wide temperature range, simple structure and manufacturing process, etc.
3、 OLED display
OLED is the abbreviation of Organic Light Emitting Diode, which is translated as organic light-emitting diode or organic light-emitting display. In fact, this luminous principle was discovered as early as 1936, but it was not until 1987 that Kodak introduced OLED double-layer devices that OLED attracted people's attention as a commercialized and high-performance flat panel display technology. At present, more than 100 research units and enterprises have invested in the research, development and production of OLEDs in the world, including display giants in the current market, such as Samsung, LG, Philips, Sony, etc. On the whole, the industrialization of OLED has begun. Monochrome, multi-color 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 capacity is still low.
Many friends easily associate OLED with LED backlight, which is widely hyped by current manufacturers. In fact, OLED and LED backlight are completely different display technologies. OLED emits light by driving the organic film itself with current. The light can be monochromatic, such as red, green, blue, white, and can also achieve the full color effect. Therefore, OLED is a new luminous principle different from CRT, LED and LCD technology.
The LED display screen is composed of LED dot matrix and LED PC panel. Text, pictures, animations and videos can be displayed by turning on and off the red, blue, white and green LED lights. The contents can be changed at any time. Each component is a display device with modular structure.
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