LED light source to speed up the popularization of the projector

Digital and network technology, the multimedia Internet has achieved projection display, core products include projection illumination system, dichroic projection lens, image processing system, signal processing circuit, micro display device etc.. In the display effect, the current projection products have been able to meet the needs of users. In recent years, the rapid development of LED light source technology, in the lighting, home appliances, IT products, industry equipment, the use of more and more widely, not only to improve the performance of the product, but also to contribute to energy saving and environmental protection. For the projector, its clarity is not enough, high environmental requirements, into the home has yet to be improved. And now the technology is mature, 3D TV has been on the market, which is not a small impact on the projector market. However, with the application of LED light source on the projector, the popularity of the projector will greatly accelerate the road. With the development of the LED light source technology, the development of the LED projector is also very fast. With the development of the projector technology, the projector will be smaller. Ultra portable projector due to the small size of the people's lives to bring a lot of convenience, welcomed by the people. In this condition, many projector manufacturers have attached great importance to the development of the small size of the projector, and scrambling to produce a kind of ultra portable projector with LED light source. How to develop the LED light projector on the market today? Application of LED light source projection products debut in front of the public, is held in May 2003 at the annual meeting of SID, with its pocket body caused a great response, however, was only a concept product. The real practical significance is the CES show in January 2005, five companies also exhibited a LED light source pocket projector, people began to consider the strengths and weaknesses of LED products in the application of projection light source. And after a year of technology and product development, January 2006 CES exhibition LED light source has become the highlight of June 2006, SID published a paper discussing the amount of LED light source, which marks a new stage in the development of LED. Due to the importance of the results, the performance of LED light source in the past two years to improve, in terms of core performance, it has better luminous efficiency, more power, and improve the light angle and monochromatic light emitting performance, thereby improving the brightness of the unit. And the new products to achieve AC-DC dual-use, and improve thermal management, etc.. These developments enable the use of LED light source projection products in the application performance is more excellent, the performance of the product market development also provides a basis for the development of. What are the advantages of LED light source projector LED light source applications, in the projector, the most important thing is to open up a new way for the fuselage miniaturization. Due to the small size of the LED light source, and has many advantages of display technology, it is more suitable for the development of compact projectors and even the original, so that the user's projection more portable and free". LED is used for projection lighting, which not only increases the life, but also changes the structure of the projector, because of reducing the heat dissipation requirements, and shortening the optical path system, so the heat dissipation and noise have better performance. At present, the main application of LED light source and integrated small projection original and portable minicomputer two projection products, integrated small projection original made independent models, with its main display devices such as mobile phone, digital camera, notebook computer integrated with micro battery, power supply, can the image projection about A4 or standard letter size the picture, easy to share with others. Pocket pocket projector is a complete independent model, compact and lightweight, one hand can easily pick up, easy to carry, can be placed in the package, the future direction of development is business applications. The utility model has the advantages that the utility model can be used for both AC and DC, the projection screen can be larger than 17 inches, and the brightness of the screen is between 15 and 200 lumens. Technical bottlenecks and development direction of LED light source projector light source projector LED overall, after several years of development, now has a certain accumulation of product performance and technology, the new product has also been able to preliminary performance is satisfactory picture. However, LED light source projector is still facing the biggest insurmountable peak, is the problem of insufficient brightness, in the actual application is also difficult to replace the bulb type products. This is also the main reason for the current development of the "difficult period", in the lighting system design of the important beam expansion theory, can be calculated to ensure full use of light energy. When the display element and the lens is decided, the matching LED light source can be selected quickly, and in the design process, the parameter can be confirmed through a compromise adjustment. Projection of the brightness of the product depends directly on the brightness of the LED, the current maximum brightness is still unable to meet the conditions of application, is undoubtedly the largest LED projector development ceiling". However, the luminous efficiency of LED in recent years progress very fast, the luminous efficiency of white LED has reached 20 to 30 lumens of /W, the highest reached 60 lumens /W, optical efficiency gap from the actual requirements of the more and more small projector. At present, LED light source has very good practice in the application of rear projection TV products, such as Samsung, SANYO, Zeiss, EPSON, Akai, JVC and other companies have developed models for display, LCD, LCOS, DLP display elements have been used, rear projection screen up to 55 inches, although there is insufficient brightness, but the application of the overall LED projector technology is worth reference. LED light source will bring more perfect color