Projection Display Technology And Laser Projector Technology
The development of laser projection
has not been counted as a new term, but it is understandable that it is still a new technology. This new technology has brought a historic turning point to the entire projection industry, and the industry was once trapped in the "laser" frenzy. After the initial exploration of laser technology, laser projection technology has entered the development stage. Through the continuous attack of laser technology, the advantage of laser is better in the projection. Laser projection products have become the main force in the current projection industry.
At present, for the projection market, there are two major mainstream projection display technologies, DLP and LCOS. The former is mainly promoted by Texas Instruments, and the latter has relatively more chip suppliers, such as Epson, Philips, and Intel.
First, Display Technology
1. DLP display technology
DLP is the abbreviation of "Digital Light Processing", which is digital light processing. This technology first processes the image signal digitally and then projects the image through light.
(DLP projection structure diagram)
This technology uses a key component developed by TI, the digital micromirror component, which is the DMD (Digital Micromirror Device) chip.
In 1987, Dr. Larry Hornbeck of Texas Instruments invented the DMD chip, which is the most advanced optical switching device in the world. It contains 2 million micro-microscopes that are regularly hinged to each other. Each microscope is only the size of a hair. One-fifth.
When the DMD chip is coordinated with the digital video or image signal, the light source, and the projection lens, the microscope can project the full digital image onto a screen or other surface to complete the entire projection process.
2. LCOS technology
LCOS technology is a technology that combines semiconductor and liquid crystal display. The micro-circuit controls the voltage to make the liquid crystal twist, and the liquid crystal controls the polarized light to switch the light to realize the display image.
(LCOS display chip)
In 2000, Aurora Systems developed the first LCOS molding products. In the following years, although there were many manufacturers joining the LCOS camp, in recent years, with the withdrawal of the two giants of Philips and Intel, LCOS technology began to fall into a trough.
Second, the Light Source Technology
When the image is converted into a digital signal, we also need a light source to project it, which requires the use of light source technology. At present, there are two major light source technologies, namely LED light source and laser light source, among which LED light source technology is most commonly used.
1. LED light source
LED (Light Emitting Diode), which is a light-emitting diode, is a solid-state semiconductor device that can directly convert electrical energy into visible light. It has the advantages of easy control, rich color and long life, and is very mature in terms of cost, industrialization, safety and industrial chain.
(LED light source projection diagram)
2. Laser source
Laser light sources enter the projection industry, and it can be said that the entire industry is crazy. Its high brightness, long service life and wide color gamut allow the projection market to expand rapidly. At the beginning of the laser light source, it encountered bottlenecks in the red and green light problems. Nowadays, with the laser technology problem being overcome, the laser projection display performance is outstanding, and the products are gradually accepted by users. In addition, it is gradually optimized in terms of details, such as eye protection and humanization, to enhance the user experience. It can be said that the market potential of laser projection is huge and the future is expected.
(Laser light source projection diagram)
In general, whether it is DLP display technology or LCOS technology, LED light source or laser light source, the ultimate goal of projection technology is to give users a better product experience. Through feedback on product application and changes in market demand, it is believed that the projection industry will also develop, explore products that are more suitable for users, and bring the industry to a better stage of development.