LCD is a common liquid crystal display. LED refers to a diode, especially a light-emitting diode that emits light. Liquid crystal display Since the liquid crystal itself does not emit light, it is necessary to use a backlight to illuminate the picture. The latest light source currently used is the LCD light source, so the LED is applied to the LCD. LEDs have advantages over traditional light sources.

: (1) High light efficiency: The spectrum is almost entirely concentrated on the visible light frequency, and the efficiency can reach 80%-90%. The incandescent efficiency of incandescent lamps with similar luminous efficacy is only 10%-20%. (2) High light quality: Since there is no ultraviolet and infrared rays in the spectrum, there is no heat and no radiation, which is a typical green illumination source. (3) Low energy consumption: The single-unit power is generally 0.05-1w, which can be tailored to meet different needs through clustering, with little waste. With it as a light source, the power consumption at the same brightness is only 1/8-10 of that of an ordinary incandescent lamp. (4) Long life: The standard lifetime of luminous flux attenuation to 70% is 100,000 hours. A semiconductor lamp can be used for 50 years under normal conditions. Even a long-lived person can use up to 2 lights in his lifetime. (5) Reliable and durable: there are no easily damaged parts such as tungsten wire and glass bulb, the abnormal scrap rate is very small, and the maintenance cost is extremely low. (6) Flexible application: small size, can be packaged in a plane, easy to develop into a light, thin and short product, and can be made into specific application products in various forms such as points, lines and surfaces. (7) Safety: The unit working voltage is roughly between 1.5-5v, and the working current is between 20-70mA. (8) Green and environmental protection: Waste can be recycled, no pollution, and does not contain mercury components like fluorescent lamps. (9) Short response time: adapt to frequent switching and high frequency operation.

Compared with LCD displays, LED displays have advantages in terms of brightness, power consumption, viewing angle and refresh rate. The power consumption ratio of LED to LCD is about 10:1, and the higher refresh rate enables LEDs to perform better in video, providing a viewing angle of up to 160° and displaying various text, digital, and color images. And animation information, you can also play TV, video, VCD, DVD and other color video signals, multiple screens can also be broadcast online. The single element of the organic LED display has a reaction speed of 1000 times that of the LCD screen. It can also be taken under strong light and is suitable for low temperatures of minus 40 degrees. LED technology can be used to produce displays that are thinner, brighter, and clearer than LCDs, and have broad application prospects.

Another angle says:

A completely different concept, LED is a kind of LED, LED is a liquid crystal display, the difference between the two is too much. But the dot matrix of LED can also form a display, suitable for outdoor large screen display, low resolution