LED projector introduction
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.
With the increasing popularity of projection devices, the market share of new projectors for LED projectors is increasing in daily life. Here is a brief introduction to some of the conceptual knowledge of the projector.
LED projector resolution
The resolution of the LED projector is expressed by multiplying the number of horizontal pixels in the picture by the number of vertical pixels. The resolution of an LED projector does not refer to the resolution of the signals that the LED projector can receive, but to the physical resolution of their core light engine ( LED chip , LCD panel, LCOS panel, etc.). Although the projector can usually receive signals of multiple resolutions, when the signal resolution is higher than the projector's physical resolution, the picture details will be significantly lost. Common resolutions and representations are as follows:
SVGA: 800x600 economical projector common resolution
XGA: Resolution for 1024x768 mainstream business and educational projectors
SXGA+: 1400x1050 resolution for high-end projectors for high-end professional applications such as images
480p: Resolution for 852x480 low-end home projectors
720p: Resolution for 1280x720 or 1280x768 mid-range home projectors
1080p: resolution for 1920x1080 or 1920x1200 high-end home projectors
LED light source
As we all know, LED projector bulbs are the same expensive consumables, which have a certain service life. When the battery is used for a long time, the bulb will age. Replacing the bulb is a problem that the projector user must consider. A major disadvantage of television.
Over the years, major projector manufacturers have been working hard to develop bulbs that have been used for a longer period of time. The emergence of LED projection technology has opened up a new situation in the development of projectors. Compared with traditional projectors, the biggest advantage of LED projectors with LED light source is that they do not need to change the bulb frequently. The life of the bulb is 10,000-20000 hours or longer, and the user does not need to worry about the loss of the projector bulb.
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. 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.
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