Bread Pitt
Member
laser projection TV and tell a lot of people are silly, and even some people think that laser projection is smart and projection, but both it's not that the same thing , How to correctly distinguish projection and laser TV from being fooled by bad business? Let's look at the differences from a technical perspective.
Light source
Laser TV uses a solid-state laser as the light source, and most of the traditional projectors are ultra-high pressure mercury lamps. The life of the laser light source can reach more than 20,000 hours, and the life expectancy is at least 8.5 years based on 8 hours per day. The life span of the ultra-high pressure mercury lamp is generally around 5000 hours, and the life expectancy is approximately 2 years based on the 8 hours of use per day Time around.
Ultra-high pressure mercury lamp for general household projection
Because of the high cost of the laser light source and the large one-time investment, it is a one-time investment that is free of replacement for a long time, and the market price is relatively high. The lamp of the projector needs to be replaced regularly, taking the service life of the laser as a measure. During this period, the maintenance times of traditional ultra-high pressure mercury lamps are about 4-5 times.
Projection technology The
current mainstream projection technology on the market is mainly divided into DLP projection and LCD projection, most people do not understand these two types of projection technology very well.
The principle of LCD projection is to find a liquid crystal panel, the strong light passes through, the lens hits the light on the screen, and the image is still displayed on the liquid crystal panel, just like the ordinary liquid crystal display.
DLP is a lot of small mirrors. Each small mirror controls the angle of light to achieve different strength and weak control. The emitted light hits the curtain through the lens to form a graphic.
Because the principle is different, the ANSI contrast of DLP projection is higher than that of LCD projection, and the picture is much brighter. The graininess of DLP is very small, the picture is seamless, similar to film projection. The LCD projection can clearly see a small square. The larger the picture, the more obvious.
Installation distance
Home projectors have higher space requirements, and a larger projection screen needs to ensure a certain projection distance. In general, you can get a 90-inch screen for more than 3 meters, a 100-inch screen for 3.5 meters or more, and a 120-inch screen for 4.2 meters, while leaving a distance of about half a meter for wiring. "This distance is a bit difficult for families with a small apartment, if you want to see a 100-inch large screen."
Laser TV can solve this problem. The laser TVs currently on the market use the principle of reflective short-focus projection, which can project a 100-inch screen at a distance of half a meter, and Hisense Laser shortens this distance to 30cm. Like a flat-screen TV, the laser projector And the screen can be placed on the TV cabinet, which is more suitable for the needs of small families who pursue large pictures.
Anti-light performance
Traditional projectors require a longer installation distance, and good curtains take into account the comfort of people viewing the vision, most of them use the principle of diffuse reflection to avoid direct reflection of strong projection light, so the anti-light performance is weak.
The laser TV uses the principle of reflective short-throw projection, which shortens the projection distance and has strong light resistance. However, because most laser TVs use a high-brightness laser light source + ultra-short throw projection distance, they will still be affected to a certain extent Light interference.
Hisense 4k laser TV uses a Fresnel passive bionic screen, which can absorb part of the ambient light, improve the performance of the laser TV to resist ambient light interference, and can also be clearly imaged during the day. In this way, have you been able to correctly distinguish the difference between laser TV and projection? Only in this way can you choose the right equipment for you.
Light source
Laser TV uses a solid-state laser as the light source, and most of the traditional projectors are ultra-high pressure mercury lamps. The life of the laser light source can reach more than 20,000 hours, and the life expectancy is at least 8.5 years based on 8 hours per day. The life span of the ultra-high pressure mercury lamp is generally around 5000 hours, and the life expectancy is approximately 2 years based on the 8 hours of use per day Time around.
Ultra-high pressure mercury lamp for general household projection
Because of the high cost of the laser light source and the large one-time investment, it is a one-time investment that is free of replacement for a long time, and the market price is relatively high. The lamp of the projector needs to be replaced regularly, taking the service life of the laser as a measure. During this period, the maintenance times of traditional ultra-high pressure mercury lamps are about 4-5 times.
Projection technology The
current mainstream projection technology on the market is mainly divided into DLP projection and LCD projection, most people do not understand these two types of projection technology very well.
The principle of LCD projection is to find a liquid crystal panel, the strong light passes through, the lens hits the light on the screen, and the image is still displayed on the liquid crystal panel, just like the ordinary liquid crystal display.
DLP is a lot of small mirrors. Each small mirror controls the angle of light to achieve different strength and weak control. The emitted light hits the curtain through the lens to form a graphic.
Because the principle is different, the ANSI contrast of DLP projection is higher than that of LCD projection, and the picture is much brighter. The graininess of DLP is very small, the picture is seamless, similar to film projection. The LCD projection can clearly see a small square. The larger the picture, the more obvious.
The Hisense 4k laser TV uses DLP ultra-short throw reflection imaging. The core optical engine DMD chip is composed of tens of thousands of micro-mirrors, forming a particularly precise "optical switch". The light source reflects directly on the screen through specular reflection to generate a seamless digital image. It can maintain good sharpness at any size, without pixel marks or "screen holes", creating amazing and vivid images.Installation distance
Home projectors have higher space requirements, and a larger projection screen needs to ensure a certain projection distance. In general, you can get a 90-inch screen for more than 3 meters, a 100-inch screen for 3.5 meters or more, and a 120-inch screen for 4.2 meters, while leaving a distance of about half a meter for wiring. "This distance is a bit difficult for families with a small apartment, if you want to see a 100-inch large screen."
Laser TV can solve this problem. The laser TVs currently on the market use the principle of reflective short-focus projection, which can project a 100-inch screen at a distance of half a meter, and Hisense Laser shortens this distance to 30cm. Like a flat-screen TV, the laser projector And the screen can be placed on the TV cabinet, which is more suitable for the needs of small families who pursue large pictures.
Anti-light performance
Traditional projectors require a longer installation distance, and good curtains take into account the comfort of people viewing the vision, most of them use the principle of diffuse reflection to avoid direct reflection of strong projection light, so the anti-light performance is weak.
The laser TV uses the principle of reflective short-throw projection, which shortens the projection distance and has strong light resistance. However, because most laser TVs use a high-brightness laser light source + ultra-short throw projection distance, they will still be affected to a certain extent Light interference.
Hisense 4k laser TV uses a Fresnel passive bionic screen, which can absorb part of the ambient light, improve the performance of the laser TV to resist ambient light interference, and can also be clearly imaged during the day. In this way, have you been able to correctly distinguish the difference between laser TV and projection? Only in this way can you choose the right equipment for you.
