Hybrid light source LED technology LED light source
The projector has developed very rapidly in the domestic education industry. The teaching solution of the electronic whiteboard is widely recognized by students and parents, but the service life of the projector bulb makes the school feel very headache, although the current common business projector has 4000. - 5000 hours of lamp life, but if you use 9-10 hours per day, you will have to replace the lamp for only one and a half years. According to Xiaobian, the government will pay for the replacement of teaching equipment for the school every 2-3 years, but for projectors with only one and a half years of lamp life, teachers will control the use time to ensure that before replacing the equipment. Uninterrupted use, but will greatly affect the progress of the teaching, and will affect the quality of the students.
In order to solve the confusion of using projectors in the domestic education industry, major manufacturers have launched a series of projectors with hybrid light sources, which completely solve the problem of the life of projector bulbs. LED+ laser projectors have a service life of up to 20,000 hours, which is an ordinary projection. The machine's 5 times lifespan greatly saves the user the extra cost of the projector. In addition, the LED+laser hybrid light source mainly passes through a blue laser light source, and a part of the blue laser light source is separated by a color wheel to output a green light source, and a red LED light source is used to form three primary colors. The light source does not contain mercury. The elements, and lower power consumption, are therefore more environmentally friendly.
LED light source introduction
LEDs are solid-state semiconductor devices that convert electricity directly into light. The LED light source is actually a semiconductor wafer. One end of the wafer is attached to a bracket. One end is a negative pole and the other end is connected to the positive pole of the power supply. When the current passes through the semiconductor wafer, it will emit light. Simply put, the LED directly puts A device that converts electricity into light.
The most important feature of LED technology is its long service life. When applied to the projector, the long service life of 20,000 hours has shown no pressure. Some manufacturers simply claim a long life of 50,000 hours, even if they use 20 hours a day. It can also be used continuously for 7 years and has the strength to compete with traditional TV in terms of service life.
LED technology not only has the characteristics of long service life, but also has the characteristics of wide color gamut. The traditional LED has a narrow spectral range. It does not have the full spectrum like incandescent lamps. After applying to the projector, it does not need to pass the color wheel. For color separation, the more pure three primary colors of light can achieve a more realistic picture.
Conventional projectors use high-pressure mercury bulbs as light sources, and the bulbs are filled with high-temperature gas during operation. Projectors using traditional light sources are exposed to the danger of reporting lights. LED light sources use packaging technology and are mostly protected by epoxy resin. Both sealing performance and impact resistance are good and are not easily damaged. Use it in a harsh environment for a long time, and don't worry about the damage of the bulb. Due to the high luminous efficiency of LED technology, its energy consumption has also been reduced accordingly, in line with the current trend of green energy conservation.
Laser (laser) light source introduction
Lasers are called lasers in Taiwan and parts of the world. Lasers are electric light sources that use excited particles to emit light under the action of stimulated radiation. The advantages of using laser as the light source of the projector are obvious, including low energy consumption, long life, high contrast, wide color gamut color, small volume, etc. At the same time, using the laser as the light source of the projector also avoids the difficulty of realizing the LED light source. High brightness problems, laser projectors have a good prospect.
If the laser is used as the projector light source, the safety hazard becomes one of the problems. The laser projector has always been characterized by a large luminous flux and a projector with a power of 20W. The luminous flux reaches 5,000 lumens. If there is a good thing, take a lens. It is possible to burn something at a certain distance. To know that some industrial cutting machine laser power is not the same, a 150mw laser can easily burn out the usual plastic film bags at a distance of 1 meter.
LED + laser source advantage analysis
If the LED is the main light source of the projector, the biggest drawback is the bottleneck of the brightness that cannot be improved, which is determined by the characteristics of the LED itself. The addition of the laser is mainly to supplement the weakest blue light source in the LED light source, and to improve the brightness and saturation of the light source as a whole.
The principle of LED+laser hybrid light source is to convert the bright red LED and the blue laser into three colors of green and high-brightness blue LED through the phosphor, and pass the DLP? The chip is projected. After the projector uses a hybrid light source, it can be used without a high-pressure mercury bulb to achieve a high-brightness projection screen. It is environmentally friendly and energy-saving, and the life of the hybrid light source can reach 20,000 hours, which can effectively reduce the user's cost and achieve 5 seconds. Projected to the brightest picture, and can support 0 second shutdown, no need for cooling time.
Advantage analysis:
1. The hybrid light source solves the problem of insufficient LED brightness, and ensures the environmental quality of the mercury-free bulb, creating a bulbless high-brightness projector.
2. LED+ laser hybrid light source has a long service life of 20,000 hours. Compared with the previous high-pressure mercury bulb projector, it has less daily maintenance cost, and the brightness attenuation is not obvious, which can maintain vivid image quality for a long time.
3. The projector with the new light source can achieve the maximum brightness of the projector in the shortest 5 seconds, which can greatly shorten the time for projecting the highlight picture, and also supports 0 second shutdown, no need for cooling time.
4. The traditional projector bulb contains mercury material, which has hidden dangers such as pollution. If the bulb is accidentally broken or discarded, it will cause serious environmental problems and even poison the human body. The bulbless technology of the mixed light source creates a mercury-free environmentally friendly light source. Effectively reduce environmental pollution and create a green and healthy projection environment.
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