LED light source is still the main technology of miniature projection

Digitimes revealed that since the miniaturized projectors were introduced into mass production in the second half of 2008, two major technologies such as Digital Light Process (DLP) developed by Liquid Crystal Silicon (LCoS) and Texas Instruments (TI) have become miniature projections. The mainstream of technology. Currently, two kinds of miniature projection technologies use LEDs as light sources. Due to the high mass production of LEDs, more and more manufacturers have the ability to mass-produce and the cost has continued to decline. Among them, LCoS micro projection technology can use white LEDs with color filters, which can effectively reduce the cost of micro projectors and increase the penetration rate.

In 2010, with the gradual recovery of the consumer electronics market, terminal manufacturers and consumers will tighten their technical requirements for pico projectors. Therefore, there will be three major trends in the development of the pico projector's image quality, including the improvement of brightness, resolution, and color performance.

In order to improve the brightness, LED manufacturers are improving LED luminous efficiency year by year; White LED with color filters has the advantage of reducing costs, but it will inevitably affect the color performance, so LCoS micro-projector terminal manufacturers have adopted RGB LED light sources. As for the resolution, although it is theoretically determined by the panel side, if the luminance does not reach a certain standard and the panel resolution is high, it is difficult to have a corresponding display effect.

In addition to LEDs, lasers have the potential to become light sources for pico projectors. Although many kinds of emerging micro-projection technologies use laser light sources, only the 2-dimensional scanning MEMS micro-projection technology developed by Microvision alone has been introduced into mass production in early 2010. Although the laser light source has the advantage of good collimation and does not require manual focusing, it will cause speckle phenomenon and affect the image quality. Although it cannot be solved, it still requires a great deal of work. In addition, due to the introduction of green lasers into mass production soon, and only the American company Corning can mass-produce, the price is high. Therefore, micro-projectors using laser as the light source must be popularized, and it may take more than two years.