What is laser television?
When it comes to laser television (LASER TV), in fact it is not really a new product. Why? As early as 2005, Sony invested in a huge laser theater with a 500-square-meter giant screen at the Aichi World Expo. In 2006, Mitsubishi launched a prototype of a 40-inch laser TV. In 2007, Sony again launched a high profile 60-inch laser TV prototype in 2007. At the International Consumer Electronics Show in the United States, Sony and Mitsubishi exhibited prototypes of 55-inch and 40-inch laser televisions, respectively. International companies such as German LDT Corporation, Japanese Sony Corporation, Japanese Mitsubishi Corporation, Panasonic, Hitachi, Toshiba, Epson, and South Koreaâ€™s Samsung Corporation have also reported positive news about laser television and laser projection products. By 2008, Mitsubishi officially launched 65-inch, 73-inch laser TVs in the US market, which seems to mark the beginning of the rise of global consumer electronics companies in fourth-generation TV display technology, but in fact it has stopped the pace of the laser show battle. Not fully open.
At that time, laser televisions launched by Mitsubishi and Sony were true laser televisions. The laser TVs developed by Sony mainly use â€œstraight scanâ€ and â€œline scanâ€ methods, while South Koreaâ€™s Samsung uses â€œpoint scanâ€ methods. Japanese Mitsubishi uses DLP rear projection TVs with three primary color laser sources, so they are the moment. TVs are the same, not the laser television products that have emerged in recent years. The two are very different.
So what are the so-called laser television products in recent years? Today's laser television is actually a laser projector. Its hardware structure consists of two major parts. The first is the body itself, and it is also a reflective ultra-short-focus projector product. The reason why it is called laser television is that it uses The laser light source, so the essence of laser television is a laser light source projector using reflective ultra-short focal projection technology; the other part of the hardware is the anti-light curtain, because the curtain material is special, can reflect off the laser projector Other than the light source, it can also display a good picture in a high brightness environment. So it's not like a normal projector, a casual white wall or soft screen.
Laser TV type
With the increasing fierceness of laser TVs and the thirst for consumers for large screens, more and more brands are cramming in. Not only TV manufacturers Hisense, Changhong, TCL, etc. are involved, among which Hisense is the main product. At the same time, domestic brands that have emerged recently have also begun to exert pressure on them, including Guangfeng, MeiLai, China Aviation, Hualu, Nuts, Eloi, etc. And traditional projector brands have also joined in, including Optoma, ViewSonic, etc. Next year or will have more brands added.
However, with the addition of many brands, the types of laser television products have also increased. From the current point of view, the market is mainly divided into three types of products: ALPD laser phosphor, SLPL fluorescent roller and pure blue laser.
The ALPD laser phosphor is a patented technology exclusively developed by Shining Peak. It uses a monochromatic blue laser for imaging by exciting the phosphor powder and projecting it with an ultra-short-focus lens. This so-called laser phosphor solution not only allows the cost to be effectively controlled, but also solves the problem of heat dissipation to some extent. Therefore, this type of product is naturally dominated by light peak laser televisions, which has become one of the main application technologies of laser projectors in the current market.
The SLPL Fluorescent Roller is a revolutionary second-generation laser fluorescence light source technology that has been successfully launched by Melo. Creatively adopting core technologies such as glass fluorescent coating technology, drum-type phosphor technology and full-excitation laser fluorescence technology, the industry has completely solved the concerns of the â€œLPLâ€ laser fluorescent light source technology in terms of brightness, lifetime, and color.
Another pure blue laser technology is based on the Taiwan-based brand, such as the laser television launched by Optoma, which uses the SSI light source technology (laser) design, the light source no longer uses "mercury", no radiation, Energy saving and environmental protection. At the same time, the projector dynamically adjusts the output power of the SSI monochromatic light source according to the screen color requirements. The power consumption is only 1/3 of that of an ordinary light bulb projector, and perfect color performance can be achieved, and a very good dynamic energy-saving effect is achieved.
It is understood that regardless of the type of laser technology, the use of red, green and blue three-color lasers is actually abandoned, and the blue laser emitted from the semiconductor blue laser with a relatively low cost is used to excite high-speed rotating fluorescence. The pink wheels, which form different color light sources, differ only in their internal details.
Laser TV advantage
Size: In terms of size, laser televisions do not have the size limitations of flat-panel televisions. The basic principle is the same as projection. It can easily project 100-inch large screens. In terms of price, starting from 60-inch flat-panel TVs, each large price increases in geometric dimensions. The price of 80-inch flat-panel TVs is already six-digit. And the size of the laser TV is flexible, users can feel their own needs, and the size of the screen can be flexibly adjusted. The LCD TV cannot achieve this function. Therefore, for various living room environments, the fit of laser television is actually better, and the most perfect size and distance can be adjusted according to the needs of users.
High-quality images: The new image reproduction technology makes full use of the advantages of the laser itself. In the way of light propagation, the laser light source is fundamentally different from the traditional incandescent light: ordinary incandescent light is emitted in all directions, and the laser gathers all the light in a parallel light beam. In addition, laser projectors can express a larger range of colors than conventional projectors, providing more sharp images. High-definition laser projectors can be used in some areas where conventional projectors are not suitable.
Long life and low maintenance costs: The laser light source has a cold light source and its lifetime is more than 10 times that of traditional TV light sources. It has been proved that it can reach 50,000 hours, but it can theoretically exceed 100,000 hours. Laser display products are environmentally friendly and energy-saving. Power consumption is only 1/3 of that of traditional TVs. It is in line with the national policy of energy saving and emission reduction. In addition, laser light sources do not use heavy metal materials that pose a threat to the environment. They are environmentally friendly light sources. Moreover, because it uses reflected light, it will not be glare at close range, and it is almost an eye-viewing mode of observation, which is comfortable and natural and does not hurt the eyes.
The use of accustomed to television: the laser light source does not require a warm-up time, you can do electricity, that is, light, and do not have to wait for heat dissipation after power off, so the use of laser light source projector products can be opened that is bright, that is, close Off, this brings great convenience to the user's use.
High 3D brightness: The laser source itself is polarized light, which is the most suitable light source for expressing 3D effects. The combination of the two is also very easy, and there is no obstacle in fusion. It can be said that in the field of 3D display, laser television has unparalleled advantages, and 3D technology is also one of the main development directions of laser television.
Display chip no difference
Of course, apart from the advantages of laser light sources, laser TVs also need a display chip as a projector. It is not a TV after all. At present, most products use the familiar DLP technology. Yes, many projectors also claim to be DLP chips, which is currently the mainstream technology used in reflective display devices. There is a need for simple science under what is a DLP.
The so-called DLP is Digital Light Processing, and the Chinese name is "Digital Light Processing." Its core is a chip named DMD (Digital Micromirror Device) digital micromirror device, whose task is to generate pixels. If the resolution of the projector is 1920Ã—1080, the internal DMD chip has 1920Ã—1080 tiny, flip-able micromirror units corresponding to the pixels of the image signal. When the pixel needs to emit light, the micromirror flips and reflects the light onto the lens so that you can see the color. If the pixel does not need to emit light, the micromirror flips in the opposite direction so that the light does not reflect on the lens, so the pixel on the curtain will appear black. DLP technology uses this mechanism to separate light of R, G, and B colors into pixels, which are then projected on the screen through the lens.
Therefore, users do not need to filter too much when selecting a laser television. The principle of display technology is the same. However, here is to say that with the 4K chip market, laser 4K TV products have also emerged, such as Hisense and Kwong Fung, have launched their own 4K laser television products, the price is naturally more expensive than 1080P models, painting Quality display is not the same.
Light curtains differ
After introducing the host of the laser television, the hardware as another part is the anti-light curtain, which also needs to be explained. At present, the market is mainly divided into metal hard screen and Fresnel passive bionic screen (based mainly on Hisense), both are also different, and the market mainly with metal hard screen with the main.
The metal hard curtain consists of honeycomb arrays of tightly packed metal molecules on the outer coating of the resin plate. The interference light waves incident from the periphery oscillate, attenuate and be absorbed when passing through the array. This feature enables the projection screen to have ultra-high contrast and ultra-high contrast. Strong resistance to ambient light interference, darker black, brighter colors, even in a brightly lit room, even outdoors in direct sunlight, can eliminate the traditional image of the mist of the blurred projection screen, providing bright, clear Through the perfect image effect, the effective imaging point distance is ultra-fine, which is 1/50- 1/30 of the ordinary screen, which makes the display fineness increased by tens of times, the image is clear and delicate, sharp and incomparable. Especially in the display of dynamic video or pictures, the strong sense of depth and depth makes the images vivid and vivid, especially suitable for movies, 3D animation and game display.
Fresnel's passive bionic screen has equidistant teeth on one side of the lens. Through these ridges, the band pass (reflection or refraction) of the specified spectral range can be achieved. The Fresnel lens is followed by a reflective layer that uses the lens angle to refract the light emitted by the host to make it parallel to the eye. Similarly, the lens and reflective layer reflect external interference light, so that it does not enter the viewer's eyes, play a role in gain. Therefore, it has anti-ambient light and high gain, so it can be normally viewed under daylight conditions without turning off the curtains.
Laser TV is also a "smart TV"
In fact, laser televisions can also become "smart laser televisions" because most current laser television products have built-in intelligent systems, adding a "box" function, which is a good solution to the lack of "content" pain points in previous projectors, allowing users to experience One-step big screen products are also one of the factors that are popular.
When it comes to the "content" of laser televisions, the difference between each brand is still very large. Therefore, when purchasing a laser TV product, it is necessary to carefully understand it, which will have different experience effects on the ease of use you bring after purchase. Of course, if you like to connect to other sources, it may not be one of the key reference factors.
For example, Hisense Laser TV has joined the Internet TV function of Hisense Smart TV. It uses the VIDAA intelligent control system and has 15,000+ movies, 150,000+ episodes, 73000+ episodes, animation, animation, and documentaries. The cumulative video duration exceeds 1 million+ hours, and the rich content resources make laser television truly a never-ending private cinema.
Optoma's laser TVs have joined the Aliyun OS intelligent system, which has built-in massive video and audio entertainment resources. It can recommend the latest content and catch up with the fresh trends. At the same time, the built-in powerful movie and TV dramas, movie theaters, and popular TV dramas are new for the first time. Moreover, it also brings new shopping experience in Ali. The TV interface is more intimate and shopping is free to do whatever it wants. In addition, parent-child interaction content has been added, and a number of preschool education video resources have been built, which can become a new paradise for parents and children.
Visible, laser television and smart TV products are almost the same, one-click to open to watch, without the need for a traditional projector, you need to connect to the source before you can watch. For users, when purchasing, you need to know where you need to choose. The "content" between different brands is different. When choosing, you need to understand clearly so that you can find the products that suit you and bring you a more enjoyable big-screen entertainment experience.