21st Century New Generation Light Source LED Charm (4): LED Makes LCD TV Thinner

21st Century New Generation Light Source Charm LED (1)

LED charm of the new generation of light source in the 21st century (2): brightness, temperature, energy saving, life
LED charm of the new generation of light source in the 21st century (3): epitaxial wafer growth, lamp bead packaging and lighting applications

In 2005, China produced the world's first 32-inch color LED TV with low-power LED chips as backlight. The revolutionary innovation has sensationalized the world. In the European and American markets and the Japanese market, it was used at that time. High-power LED chips such as 1W are used as backlights. The 32-inch LED is about $1,000. It is reduced to about $200 with a small chip. The low-power LED chip is used as a backlight. The direct benefit is that the cost is greatly reduced. Compared with traditional TV sets, LED TVs have become cheaper, more energy-efficient, and have a long life and low temperature and no electromagnetic radiation. It has entered the homes of ordinary Chinese people more quickly, especially the energy-saving advantages of LED TVs. It has been widely recognized that in 2011, the mainland China market sold about 50 million LCD TVs. If these 50 million units are all replaced with LED backlights, each TV can save about 47 watts of electricity, and watch TV every day for 4 hours. Calculated, about 50 million TVs, the annual electricity savings will be 3.4 billion degrees, equivalent to the Danjiangkou hydropower station's annual power generation.

While enjoying the clear, bright and moving picture of LED TVs, people are surprised to find that high-tech products such as TV, computer and mobile phones are becoming lighter and thinner, and become a fashion. Traditional LCD TV screens need to be cold. The cathode lamp illuminates as a backlight to illuminate the liquid crystal display. It is a direct-type backlight. It is placed directly under the liquid crystal glass, that is, the front and back. It needs a certain amount of light when it is mixed. The distance limits the thickness of the entire LCD TV. When the LED appears, it can now illuminate the LCD screen with the side illumination. From the actual application, the thickness of the entire LCD TV can be made thinner and thinner. .

With the LED side-illuminated backlight technology, the backlight becomes a thin surface that can emit light. It is close to the liquid crystal display to make it bright, which makes it possible to thin the whole electronic products such as TV. The liquid crystal technology turns the point light source into The line source is turned into a uniform surface light source by secondary optics technology. The infinite wisdom of the technicians makes the LED change from a point source to a surface source.