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As we all know, the projector bulb is the same expensive consumable, it has a certain service life, the bulb will age when used for a long time, the replacement of the bulb is a problem that the projector user must consider, this is also the projector LCD TV A major disadvantage. Over the years, major projector manufacturers have been working hard to develop bulbs that use longer time, extend lamp life through various ECO technologies, and even introduce dual-lamp automatic projectors. The ultimate goal is to maximize user replacement. The period of the projector bulb.
The emergence of LED projection technology has opened up a new situation in the development of projectors. Compared to conventional projectors, the biggest advantage of a projector with an LED light source is that there is no need to replace the bulb. At present, the life of traditional LCD and DLP projector bulbs is about 1000 hours to 3,000 hours, while the LED projector has a bulb life of 10,000-20000 hours or longer, and users do not have to worry about the loss of the projector bulb.
Projectors using LED light sources have the following characteristics:
1, the life is too long, almost no need to consider the use of time
LED (Light Emitting Diode), also known as LED, has long been used in display and lighting applications. Its main body is an electroluminescent semiconductor material. A forward voltage is applied across it. The current flows from the anode of the LED to the cathode. The semiconductor crystal emits light of different colors from ultraviolet to infrared. The stronger the current, the stronger the illumination. . The principle of LED illumination is different from traditional UHE and UHP bulbs. It does not generate a lot of heat during the illumination process, so the lifetime can reach more than 10,000 hours.
2, ultra-portable, ultra-quiet, very low heat
Since the LED is a cold light source, it does not generate a large amount of heat like a metal halide lamp, and reduces the complicated optical path structure required by the original light source, so that the requirement for the projector heat dissipation system can be reduced, and the volume can be compared. It turned out to be much smaller. On the small side, LED projectors are generally kept below 1 kg, and some even only about 0.5 kg. This weight is easy to carry and move. And the noise is much smaller.
3, special power saving, almost no need to consider the issue of electricity costs
The LED projector is small in size and low in heat generation. The power consumption of the lighting bulb is much lower than that of the traditional UHP lamp (super lamp), UHE lamp and metal halide lamp, which is about 20 watts of power consumption. Users don't have to worry about power consumption.
4, the price is acceptable
Compared to expensive UHP or UHE sources, LED sources are much cheaper than conventional sources. Not only does the cost of the light source decrease, but the total cost can also be well controlled by saving the heat dissipation system and streamlining the optical path structure. Like the latest version of Optoma's handheld LED projector PK-101, the retail price is only 3,000.
Insufficient brightness of LED projection is fatal
Although LED projectors have various advantages, at present, the shortcomings of LED projectors are also very obvious. In terms of technology, brightness is a limitation for LED light sources to be widely used. At present, the brightness of projectors using LED light sources is generally around 100 lumens, which is not competitive with the brightness of thousands of lumens of conventional projectors. However, LED projections are constantly seeking solutions. Samsung's latest SP-P400 brightness has reached 150 lumens, which is a certain improvement over previous generation LED products. Recently, LED projections seem to have a tendency to break out in silence. Many mainstream projection manufacturers have unveiled their LED projection devices. The most typical representatives are Samsung SP-P400 and Optoma PK-101. Let's introduce These two LED projectors.
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