Rear projection TV restoration opportunities for solid state lighting

Mention television, I believe many people have no idea, because everyone has the heart of projection TV is a historical term, in the eyes of public television products are currently only CRT, plasma and LCD products, but the author thinks that the projection TV is not entirely due to historical, technical innovation of solid-state light source, the restoration of absolute RPTV not talk.

Advantages and disadvantages of rear projection TV

When it comes to rear projection TV has the opportunity to go back to the stage of history, we need to do not understand the friends of the advantages of the rear projection tv. First of all, the rear projection TV can be more convenient to experience a larger, more clear screen audio-visual enjoyment. Secondly, the rear projection TV has a mature high brightness and long life. Finally, the rear projection TV meets the requirements of health and environmental protection, and the price is cheap.

Of course, we can not avoid the LCD and plasma advantages, or flawed projection products itself, but the new solid-state light source technology innovation, there may be an all this draw period, because with the same strain of rear projection TV projector products have begun to realize the change, and this change will influence rear projection TV products in the future.

Ultimate picture performance

Advantages and disadvantages of rear projection TV

When it comes to rear projection TV has the opportunity to go back to the stage of history, we need to do not understand the friends of the advantages of the rear projection tv. First of all, the rear projection TV can be more convenient to experience a larger, more clear screen audio-visual enjoyment. Secondly, the rear projection TV has a mature high brightness and long life. Finally, the rear projection TV meets the requirements of health and environmental protection, and the price is cheap.

Of course, we can not avoid the LCD and plasma advantages, or flawed projection products itself, but the new solid-state light source technology innovation, there may be an all this draw period, because with the same strain of rear projection TV projector products have begun to realize the change, and this change will influence rear projection TV products in the future.

Laser TV

The most representative solid state light source is the laser light source, the laser television has the extremely pure color performance, the obvious color depth and the contrast superiority. In addition, the visual angle of laser projection to solve the problems of DLP, the thickness of the body is about 25cm, 120Hz scan, brightness 500nits, but the power consumption is only about 200W, is half of the same size LCD or plasma or 1/3, at the same time, it also can ensure the long time work, does not appear the phenomenon of burning.

The most representative is MITSUBISHI, she has been optimistic about the laser light source and projection TV has been increasing investment in research in this area, as early as 2006, MITSUBISHI unveiled the laser projection TV, and in CES 2008 and CEDIA 2008 exhibition also exhibited its 65 inch laser TV products. In addition, the German company LDT, South Korea's Samsung Corp, Japan's Sony Corp is also actively carried out the research of laser TV, the Sony Corp of Japan developed laser TV mainly uses the "direct scanning" and "scanning", German LDT, South Korea's Samsung Corp is used to "scan".

Our country is suitable for the development of laser rear projection

As early as the end of the last century in 80s, laser display technology has entered the 863 plan of china. In 2002, China has achieved a major breakthrough in the field of technology, launched the all solid state laser display principle prototype, developed in 2003 60 Inch rear projection display laser machine, and then launched 84 Inches and 140 inches large screen laser display prototype.

In addition, China is suitable for the development of LCoS technology, this view has been put forward for many years, after nearly 10 years of efforts, LCoS industry chain has been formed. Nanyang Lida optical company in Nanyang Henan optical group company subordinate and Henan Nanfang Huihuang image information technology Co. Ltd. based on optical design and manufacture, manufacturing technology of large-scale optical thin film with independent intellectual property rights, Chengdu company, Wuhan Yangtze River Crystal Technology Limited production of photoelectric projection lens. Shenzhen OMT company developed LCoS optical engine, Shandong and Dezhou three electric appliance Limited company produces all kinds of power supply equipment...... So far, the optical engine factory, the projection lens factory, the screen factory, the light source factory, the electric control factory, the power plant, the mirror factory, the mold factory, the shell factory are all set up, the construction of the industrial chain is very complete.

Finally, in the laser TV patent, the patent China Intellectual Property Office website for retrieval keyword search, and after screening found more than ten patent technology on Laser TV, in the technical reserves we are not backward.

Cost is the biggest bottleneck

Most manufacturers said the main reason is that the cost of laser display. Wang Zhanguo Chinese Academy of Sciences in an "Chinese electronic newspaper" interview with reporters, said: "the laser semiconductor price of about $20 per watt output power, if the image to achieve the 60 inch screen effect, laser synthesis of white light generally requires 20 watts. "So, the price of the laser should be around $400.

Light source cost problems to be solved

However, the price of $20 per watt is not the current price, but the future of the laser to achieve mass production after the price, the price is still high. Academician Wang Zhanguo told reporters: at present the biggest problem is the cost of laser display problems. When the laser power is large and the lifetime is long, or the wavelength is accurate, the cost is very high. The reason for the high cost is that its yield is not enough, and the yield is not enough