Laser tv principle laser always emits light of a certain wavelength and color. Red, green and blue colors can be produced by installing a special crystal or light guide in front of the laser, and then converting the laser into the desired color through so-called focusing in these materials. During screening, red, green and blue data are sent to the modem inside the laser unit, and the video data is converted into optical information through amplitude modulation. The light of red, green and blue components is combined into a single laser beam, and the laser beam containing all image information is sent to the projection head through the optical cable and finally projected on the screen.
The advantages and disadvantages of laser tv are 1, and the advantages of laser tv (1) are bright colors.
Laser tv has bright colors and high brightness, so the host can be placed flexibly. Laser tv can first adapt to all TV standards, that is, PAL system, NC system, SECAM and other HDTV signal systems, and now it has supported 4K display resolution.
(2) Convenient home installation
Compared with LCD TVs of the same size, laser tv is more compact, with lower power consumption and lower cost performance, which can meet the needs of family living rooms.
(3) Long service life
Its room temperature life can generally reach 25,000 hours, which is greatly improved compared with the traditional projector's bulb life of 3,000 hours, and meets the needs of TV service life.
(4) Safety eye protection
The red, green and blue visible laser beams in laser tv are projected onto the screen after passing through beam expanding and shaping equipment, and the luminous image seen by human eyes is soft light, which will not cause harm to human eyes. Laser tv is usually equipped with eye protection device, which can automatically reduce the brightness when the human eye is close to the laser beam, further avoiding the harm to the human eye.
(5) Comfortable viewing
Laser tv's image is the light reflected by the host computer in the laser tv from the laser tv screen, which conforms to the principle that the human eye sees everything in the world, and is comfortable and natural, and does not hurt the eyes. According to the evaluation of relevant institutions, laser tv products are completely in line with the theoretical visual requirements and are harmless to the naked eye. The screen has no electromagnetic radiation, and the eye protection is healthy and comfortable. Compared with watching LCD TV, the comfort is improved by 20%.
(6) Anti-ambient light
Laser tv comes standard with an anti-environmental light curtain, which eliminates the influence of ambient light on images, thus making laser tv and LCD TV have the same usage scene and further enhancing the experience effect.
2. laser tv's shortcomings (1) The core components need to be broken through.
Laser is the most expensive and core component in laser display system. More use of semiconductor materials, how to reduce costs will be an urgent problem to be solved in the industrialization of laser tv. On the other hand, due to the influence of volume and technology, domestic semiconductor light source technology needs to be further improved.
(2) The industrialization competition is fierce
In the case of LCD TV, the industrialization scale of laser tv is still unable to compete with LCD or LED, and it is still difficult to reduce the cost on a large scale.
(3) Ultrathin is still a challenge.
Because laser tv adopts transmission type, although the screen is very thin, the laser transmitter still has a certain thickness, and the larger the screen size, the greater the thickness, which cannot be as ultra-thin as LED LCD TV. Although laser tv can easily have the same size as an LCD TV, laser tv can't save space like a flat-panel TV because of laser tv's innate imaging principle. Laser tv must have an external projection device, which needs to be placed in front of the panel. The principle is similar to that of a projector, so laser tv may not be a good choice for users who want to save space.
(4) Brightness and viewing angle are not as good as LCD TV.
Compared with ordinary projection curtain, it can effectively resist the interference of ambient light. Of course, no matter how good the projection screen effect is, there is no way to achieve the effect of LCD TV with its own backlight, and the influence of ambient light on it will be more obvious. Therefore, the problem of low brightness in laser tv has not been effectively solved. In addition, in terms of viewing angle, due to the special reflection principle of the panel, the viewing angle of laser tv can't achieve super wide-angle viewing angle like LCD TV, and the brightness will obviously decrease when it exceeds 120 degrees.
Laser tv screen brightness still needs technical breakthrough. Although the screen size is large, the display effect is difficult to guarantee, so the brightness technology has become a foundation for laser tv to challenge LCD. At present, the brightness of laser tv is basically 3000 lumens, and the development of laser light source technology is still a long way from the industry expectation.
The difference between laser tv and organic light-emitting diodes Theoretically, laser has good monochromaticity and can restore more realistic colors. The NTSC color gamut can reach up to 1 10%, which is superior to the OLED screen. At the same time, laser tv also has ultra-low power consumption, and its life span is much longer than that of ordinary projection and TV.
Compared with OLED and quantum dot TV, the biggest advantage of laser projection TV is TV panel. Mijia laser projection TV was released today. If you put the screen image of 150 inch on the TV screen, the cost is not generally high. Moreover, although the price of TV panels is decreasing, it is still a big burden in investment. From the perspective of gender comparison, laser projection TV is more popular.
However, OLED TV is not completely without advantages. Organic light-emitting diodes are self-luminous, which can display purer black, with almost no light leakage problem and better response speed. Laser tv is a projection after all. If the screen is the same size, the display effect of the screen is still slightly weak.
Laser tv: 1 How to choose? Look at the brightness. Compared with the traditional bulb light source, laser has great advantages. First of all, the brightness of laser is generally high. Laser tv generally uses laser diode as the basic light-emitting element. In order to obtain higher brightness, it is necessary to increase the number of diodes, but this will also lead to an increase in volume and energy consumption.
2, look at the color color is also a big standard to measure laser tv. As we all know, laser tv's color performance is better than that of projectors using light bulbs as light sources. The main reason is that the color of the laser light source is purer.
Two-color laser tv performs better. It uses red and blue laser light source, in which blue laser is used with green phosphor color wheel, and the projected color effect is better than monochrome laser tv. Although the development of red laser technology has made progress, and the cost has also dropped significantly, the price of two-color laser tv is still high, generally around 70,000 yuan.
The disadvantage of monochromatic laser tv is that the development of green laser is not very mature, the photoelectric conversion efficiency is still relatively low, and the cost is also high, so the price of three-color laser is estimated to be above100000 yuan after listing.
3. Look at the resolution. Resolution is an inseparable index to measure the products in the display industry. Laser tv's products are mainly large screens, so the requirements for resolution are naturally higher. At present, 4K has become the mainstream of the mid-to-high-end big-screen market, but the price is definitely higher, while the laser tv products with a market price of about 10,000 yuan are still at the level of 1080P.
4. Look at the intelligent system. Intelligent system is an important index to measure a laser tv. A good intelligent system can bring more convenience and better experience to users. In the past, projection products needed to be used with TV boxes, which was inconvenient and the quality of TV boxes could not be guaranteed. Nowadays, it has become the general trend to configure intelligent systems in laser tv, and the requirements for intelligent systems are getting higher and higher.