Learn about LED projectors, LED projector principles and basic parameters

In recent years, LED projectors have slowly entered the homes of many users, and more and more people use LED projectors. What is an LED projector? How do you see if the LED projector is suitable for you? Know the information and you know what kind of LED projector is right for you.
The basic principle of LED projector:
LED (Light Emitting Diode), also known as light-emitting diode, has long been used in display and lighting. This kind of bulb has the characteristics of high efficiency and long life, so it can be used on the projector. The life of the projector can reach more than 20,000 hours. The principle of LED illumination is different from the traditional UHE and UHP bulbs. It does not generate a lot of heat during the illumination process. With the increasing popularity of projection devices, the market share of new projectors for LED projectors is increasing in daily life.
Because of its technical characteristics, LEDs are mainly used in pico projectors because of their low power consumption and heat generation. Because LED light sources are used, the projectors can be reduced to the micro projectors we see. For example, Weijie WEJOY series products.
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 the LED projector refers to the physical resolution of the projector's own nuclear light engine, not the resolution that the projector can receive, that is, even if it receives a movie higher than the resolution of the projector itself, the projector can still receive it. Projected, only the projected resolution is the resolution of the product itself, not the resolution of the film.
SVGA: 800x600 economical LED 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
Everyone knows that the projector is sometimes expensive on the bulb. The bulb is a relatively expensive consumable. It has a certain service life. Therefore, when it is used for a long time, it will need to be replaced. The replacement bulb is a projection. Machine users must consider the problem, which is also a relatively large defect of the projector. After all, who wants to buy a product, there is no need to change parts frequently. Every projector manufacturer hopes to extend the life of its own projector bulb, but many limitations make this problem still not an ideal state; but the emergence of LED projection technology has opened the development of projectors. A new situation. Compared with traditional projectors, the biggest advantage of LED projectors with LED light source is that there is no need to replace the bulbs. The life of LED projectors is 10,000-20000 hours or longer. Users don't have to worry about using them when they need them. To replace the bulb, the life of more than 20,000 hours is equivalent to a lifetime without the need to replace the bulb.
Since the LED is a cold light source, it does not generate as much heat as a metal halide lamp when working, and reduces the complicated optical path structure of the original light source, so that the requirement for the projector heat dissipation system can be reduced, and the volume can be made. It is much smaller than the traditional projector, that is, the general LED projector will also be called a micro projector; the general LED projector is kept below 1 kg, and some even only about 0.5 kg, so the volume is very It is easy for us to carry and move, and it can also reduce noise problems.
brightness
The brightness of the LED projector refers to the light output of the LED projector, which is expressed by the luminous flux (the energy that the light source radiates to the surrounding space per unit time to make the human eye feel), and the unit is lumen. For projectors, the higher the lumens, the stronger the brightness. However, since the LED projector's light bulb is relatively expensive, and the power is limited, and at the same time, increasing the power will cause problems for the heat dissipation of the LED projector, so it is costly for the LED projector to increase the brightness.
Contrast
The ratio of black and white in the projected image of the LED projector is the gradient from black to white. The larger the ratio, the more gradients from black to white, and the richer the color.
Projection screen size
It refers to the size of the diagonal of the projected screen. To deliver the required size, the LED projector needs to be mounted at a corresponding distance from the projection screen. At present, mainstream LED projectors can easily deliver large screens of more than 100 inches, and some high-brightness engineering projectors can also deliver images of more than 200 inches.
LED projection distance:
The projection distance of the LED projector is determined by the distance between the projector and the projection surface. The closer the screen is, the smaller the screen will be. The farther away the screen is, the larger the screen will be.
LED projector video output, input interface:
The video input interface of the LED projector refers to the interface that connects the computer display signals, so that the computer video signal is transmitted to the LED projector through the input interface to deliver the image of the computer. Some LED projectors also have a video output interface, through which you can connect to other display devices such as monitors and LCD TVs. If the projector does not have this interface, you can use a VGA splitter to connect the display.
HDMI HD interface for LED projectors
HDMI not only meets 1080P resolution, but also supports digital audio formats such as DVD Audio, supporting eight-channel 96kHz or stereo 192kHz digital audio transmission. HDMI devices feature “plug and play”, and “negotiation” is automatically performed between the source and display device to automatically select the most appropriate video/audio format.
LED projectors have the inherent characteristics of LED projectors, and traditional large projectors also have the advantages of traditional large projectors. They are indispensable so far; LED projectors are constantly improving, constantly improving their own advantages and improving their own shortcomings; and it is the competition between LED projectors and traditional large projectors. Relationships also seem to complement each other, but it is because of this relationship that their future development is worth looking forward to; Guangzhou Weijie will also follow LED projectors.

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