After years of technological development and product marketization experience, the projector products developed by using microdisplay devices are quite mature in technology. The projection products can be said to have penetrated into many large-screen display fields such as education, business and home entertainment. There are various types of front projectors and rear projectors available. LCD, LCOS, and DLP are the three main microdisplay projection original technologies. In the general civil field, the size ranges from 0.55 inches to 1.3 inches.
The digitalization, networking and multimedia interconnection of projection display technology have been realized. The core components of projection products include light source illumination system, color separation and color processing system, projection lens, image signal processing circuit and micro display device. In terms of display effects, current projection products are fully capable of meeting the needs of users.
Of course, the user's expectation for the product is endless. The user wants to be more compact and portable, and it is better to carry the projection product for the convenience of the application; and hope that the product is more cost-effective, not only the price of the product, the light bulb, etc. The service life of components is also a very important part. After all, the current projection bulbs are expensive. In addition, as the "core" of the projection product, the display effect is of course also required to be guaranteed in the application. These three major performance improvement requirements, although the new product has been greatly improved, but the "bottleneck" is also more and more obvious, because this is closely related to the design of the projection optical path system, in order to obtain a better product, There must be newer and more practical technologies and product applications. The LED light source technology has been well developed and applied, and it can be said that it is one of the most important development directions of projection.
How is the development of LED light source projectors on the market today?
The projection product using LED light source was first unveiled in front of the public. It was at the SID annual meeting held in May 2003. It caused great repercussions with its compact body. However, it was only a concept product. What is really practical is that at the CES show in January 2005, five companies also exhibited LED projectors for LED light sources, and people began to really consider the advantages and weaknesses of LED light source projection products in application. After one year of technology and product development, the LED light source became a prominent highlight at the CES show in January 2006. A large number of LED light source papers were published at the SID seminar in June 2006, marking a new stage of LED development.
As a result of the emphasis, the performance of the LED light source has been improved in the past two years. In terms of core performance, it has better luminosity, greater power, and improved illumination angle and monochromatic luminescence performance, thereby improving unit luminance. And the new product realizes both AC and DC, and improves thermal management.
These developments have made the projection products using LED light sources more excellent in application performance, and the performance improvement has also provided the basis for the market development of the products.
What are the technical advantages of LED light source projectors?
The application of LED light source, in the projector, the most important significance is to open up a new path for the miniaturization of the fuselage. Because the LED light source is small in size and has many display technology advantages, it is more suitable for developing compact projectors and even originals, so that the user's projection is more "contained" and "liberalized".
LEDs are used for projection illumination, which not only increases the lifetime, but also changes the structure of the projector. Since the heat dissipation requirement is reduced and the optical path system is shortened, the heat dissipation and noise are better. At present, the main application of LED light source is integrated with small projection originals and pocket-sized minicomputers. The integrated small projection originals are not made into independent models, which are mainly integrated with micro display devices such as mobile phones, digital cameras and notebook computers. Together, battery-powered, you can project images of about A4 or standard letter size for easy sharing with others. The pocket-sized handheld projector is a complete and independent model. It is small and light, and can be easily picked up by one hand. It is easy to carry and can be placed in a file package. The future development direction is business applications. It can be used for both AC and DC, the projection picture can be larger than 17 inches, and the screen brightness is 15 to 200 lumens. With the development of technology, the display effect is still increasing.
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