Brief Principles of laser projection technology and development status. .
Maybe you also from the innovation of China's CCTV has recently "column to see reports on laser TV, we are familiar with the existing LCD, plasma, OLED display technology, as well as upcoming mature SED etc..
Technology, the laser projection imaging technology we know even less. Curiosity has always driven me to understand these new things, so there was this article. As the knowledge-level constraints and no real access to opportunity, and I only. .
Some can be done but only.
First, China's only 84 inches of the laser television prices up 700,000 yuan. .
Manufacturers and basic principle:.
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CCTV mentioned laser TV, is served in the month of November in the year 2005 Shanghai international industry fair exhibit 84-inch laser TV, it comes from the Chinese Academy of Sciences of Changchun new industry optoelectronic technology co., Ltd. Changchun.
Optical display device manufacturers are not producing, but production of laser emission device in 2003 after the company has been able to produce much lower than international market prices of the red, green solid-state lasers. In the same year, Changchun Optoelectronics. .
The world's first implementation of a blue laser with industrialization, the three colours of the laser, in accordance with the principle of the three primary colors visible spectrum synthesis, developed the world's first laser TV.
Present. .
The annual production of low-power all-solid-state laser reaches 6 million units (including Blu-ray laser with an annual output of up to 2 million units), and similar products in the international market share of 30% of the production of the like product in the world biggest manufacturers. Since.
Chinese-made laser to enter the international market, so that green laser from the past two thousand U.S. dollars to less than 400 U.S. dollars, Blu-ray laser from the past 10 thousand U.S. dollars to less than 1,000. .
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We know that two characteristics of laser light is frequency of single, parallel and not divergent transmission path, so do not need the lens to focus. Laser tube was originally produced by monochromatic laser beam, through the special lens or light guide. .
Be modulated into red, green, and blue, in accordance with the video signal for three of the luminance and scan information control, and then through synthesis device is projected onto the screen.
Synthesis of laser projectors. .
The principle and the TV image. Laser beam from top to bottom, from left to right "fire." Horizontal deflection (line scan) show header a faceted rotating mirror, vertical deflection (frame) over a skew.
Mirror. Work processes and CRT's electron beam scans the screen somewhat similar, but the electron beam is deflected by the magnetic field is scanned, the laser will rely on a prism. .
Why is it called "laser" TV.
Logically speaking, this should be called the laser projection is more appropriate, and that the company had earlier produced a 60-inch laser projector, I think is called a television, one size is not too large, and second, the scanning process was similar to CRT TV Xiang Guan, third world it could get. .
What are the benefits?.
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There is no lens, there will be no deformation, ordinary projector requires us to put in the position of the screen, while the laser projector do not have this problem, even if the "show headers" in the corner, a projection screen.
And no deformation. And even bizarre projection geometry, such as an arch screen, and even a round screen, laser projection does not produce anywhere ambiguous phenomenon. .
In addition, laser color purity is high, so the colors in the image displayed on a very lifelike, purportedly exceeded standard NTSC color gamut of 100 per cent. Anyone remember the LED-backlit LCD TV, the alleged 105 per cent of it, I don't know, haven't seen anyway.
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Laser projection of the light-emitting efficiency is very high, the traditional projection bulbs for halogen bulb, only 2-3% of the energy is converted to light, the other becomes the heat, but also more afraid of vibration. Therefore, laser projection, electricity consumption is smaller.
Will not produce heat. It is the general life at room temperature up to 10 million hours of high temperature aging test projected life of up to 1 million hours at room temperature, so it is a long, high-reliability products ordered. .
2 Kodak's GEMS and SONY for GxL.
Germany LDT Company, Korea's Samsung Corporation are developing laser projection technology, but it certainly is not what success, Kodak made the GEMS, SONY's GxL blockbuster in the Expo, and they still talk about them. .
The original cited technology online reported that during the month of June 2004, Kodak use MEMS (micro-motor system) developed a new type of laser projection TV component and "SID 2004" exhibition for the first time. Can be used as a front projection and rear-projection TV image components.
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Kodak will be the development of components is called "Electro-Mechanical GEMS (Grating.
System, gate motor system). "Formed in silicon can be electronically controlled so that the linear grating diffraction of light occurs, while in the control of laser light to scan, then the image projected onto the screen. Pixel size..
36 μ m, vertically 1080 pixels. This will display the 1080 lines of the image. The company already has a CCD sensor manufacturing technology, this would have applied the sensor manufacturing technology. Optical efficiency.
After a 60% response time of 50ns, contrast ratio of 2000:1. .
Kodak is not a laser device of GEMS, which is used to control the formation of image of a laser beam, personally think that this is better than laser technology requirements, not low, as for domestic that laser TV is that I do not know.
Expo this year, SONY projection display can be 50 meters wide and 10 meters high image of the Laser Dream Theater system did become an overnight success, and this is now we can understand in detail examples of the laser projector products. .
The system diagram.
The system system consists of three GxL HDCAM video projector and three composition, that is, one can display 20x10 meters GxL large image, the number of inches it together. . Hook three strands 4. .#$%^&。 . I am not the first. .
The system diagram.
The system system consists of three GxL HDCAM video projector and three composition, that is, one can display 20x10 meters GxL large image, the number of inches it together. . Hook three strands 4. .#$%^&。 . I am not the first. .
GxL renderings.
GxL display devices. .
Monochrome work schematic symbol GxL.
Schematic diagram of monochrome GxL components work. .
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SONY's GxL looks almost Kodak GEMS is used to control the laser scanning imaging. The picture shows the monochromatic light road work on the schematic. GxL component also is MEMS (Micro..
Electro Mechanical Systems。.
) Process made of (SONY CCD can create the oh), a number of articles on the surface of metal wire, under the control of the reflected laser signal different degrees, thus achieving a brightness control, by rotating the prism reflection. .
Complete the scanning process. Three-way color laser hybrid form a color image.
3 Laser TV's ultimate ability - holographic three-dimensional imaging. .
Holography is the use of optical interference and diffraction, specific light emitted in the form of interference fringes on record, and then by diffraction method to make it reappear, yet the original objects, real 3-d image. Due to the record all information objects (amplitude and phase), and therefore called holography or Holograph.
Coherent laser light source as the best in achieving the three-dimensional holographic display area come in handy. I do not know at home to see three-dimensional image floating in the air how many years, but think about all that excited. .
In addition, I also hope that China's laser TV can have a good development, despite the fact that after reading this article, we know parts display controller technology for laser imaging how important and relevant industry capacity in China probably do not know how many years behind, just hope not to degenerate into an export base of cheap components.
