With the increasing popularity of projection equipment, in daily life, the new LED projector projector market share is growing. Here is to you a brief introduction to some of the conceptual knowledge of projector.

The LED is also called the light emitting diode, this technique begun long ago used in display and lighting fields. It is the main body of a piece of electroluminescent semiconductor materials, where it ends with positive voltage, current LED from the anode to the cathode, a semiconductor crystal emitted from the ultraviolet to the infrared light with different colors, the strong current, emitting more strong. LED luminous principle is different from traditional UHE, UHP bulb, it glows process does not generate a lot of heat, so the service life can reach more than 10000 hours.

LED projector resolution

LED projector resolution that is used in the picture pixel number multiplied by the number of pixels horizontal vertical. The resolution is not a LED LED projector projector can receive the signal resolution, but that their core light engine ( LED chip, LCD panel, LCOS board ) physical resolution. Although the projector can often receive multiple resolution signal, but when the signal resolution is higher than the physical resolution projector, screen will appear obvious loss of detail. The common resolution and representation methods are as follows:

SVGA: 800x600 economic type projector common resolution

XGA: 1024x768 mainstream business and education projector adopted resolution

SXGA + : 1400x1050 face image and other high-end professional application of high-grade projector employing the resolution

480p: 852x480 low-end home projector adopted resolution

720p: 1280x720 or 1280x768 profile home projector adopted resolution

1080p: 1920x1080 or 1920x1200 high-end home projector employing the resolution

LED light source

LED projector bulb is the same as the more expensive consumables, it has the certain service life, when used for a long time the bulb will be aging, lamp replacement is projector users must take into account, it is also compared to LCD TV projection of a big disadvantage.

Over the years, each big projector manufacturers, is committed to continuous research and development to use longer bulb, LED projection technology, opened a new development situation of projector. Compared with the traditional projector, using LED light source LED projector is the biggest advantage of does not need frequent replacement of light bulbs, the bulbs in the life of 10000-20000 hours or even longer, the user completely without worrying about the problem of loss of projector.

Because LED is a cold light source, in the work not as metal halide lamps produce a large amount of heat, and simplifies the original source of the complex demands of the light path structure, which can reduce the requirement of cooling system for projector, the volume can be much smaller than the original.

Aspect since childhood, LED projectors are generally maintained at 1 kg, some even only 0.5 kilograms, such that the weight of portable and mobile use. And the noise is small.

LED projector performance

Short focus

Short focus projection lens, as the name suggests is a shorter focal length LED projector. Short focus projection of what are the advantages? Short anxious projector LED biggest advantage is equal to the size of the picture needed for projection distance is shorter. This type of LED projector in the projected image is no longer needed a larger space, thus widely by small and medium enterprises, education market users, for home users, short focal LED projector is also important, especially some relatively small households living room.

Short focal LED projector with wide-angle or fish-eye lens, the lens production process and costs are often higher than the normal lens, high cost factor is not conducive to the short anxious projector popular main reason.

Brightness

LED LED projector projector brightness of light output, the luminous flux ( light source in the unit time within the surrounding space radiation out so that the human eye to produce a sensory energy ) to express, is a unit of lumen. For a number of lumens projector, the high brightness stronger.

But due to the LED projector bulbs are more expensive, and the power is limited, and constantly increase the power and will to LED projector radiation problem, so the LED projector for improving brightness need to pay a high price.

Contrast

LED projector for projecting an image of black and white ratio, namely from black to white gradient layers. The ratio is higher, from black to white gradient hierarchy is more and more rich, color performance.

Uniformity

It is the brightness and related concepts, cast picture middle brightness and surround luminance ratio, generally defined as the 100% intermediate. LED projector for projecting the image onto the screen brightness is not completely uniform, some local brightness will be higher, some local brightness will be lower. Of course, the projector brightness distribution more uniform.

LED projector projection

Some users will install LED projector projection screen to running back, so you can avoid the positive on the collision, shelter and other issues, but the projection screen to choose through the back curtain, it is better for the projector separately prepared an anechoic chamber, it can obtain better projection effect.

Projection screen size

Refers to a picture diagonal size. To put out the required size, need to be installed on the LED projector and projection screen corresponding to the distance. The current mainstream LED projector can be easily put out 100 inch above the large screen, high brightness project projector can also put out 200 inch above the picture.

Projection distance

Refers to the LED projector lens and screen between the horizontal distance.

Horizontal scanning frequency ( frequency )

Also called the line frequency, LED projector has a horizontal scan frequency range. If from computer image source input signals to the horizontal scanning frequency beyond this range, LED projector will not launch, usually displayed" NOSIGNAL". If your computer display configuration is higher, it is recommended that you do not buy the lower end of the horizontal scan frequency poor projector, or will not be projected ideal image effect, or even impossible to use.

LED projector video input, output interface

LED projector video input interface means connected computer display signal interface, let the computer video signal through an input interface to the LED projector and then put a computer image. Part of the LED projector also has a video output interface, the interface can be connected with the display, LCD TV and other display equipment. As the projector without this interface, to connect the display, you can use the VGA distributor to achieve.

Vertical scan frequency ( refresh rate )

Also called the frame or image on the display refresh rate. If the input from a computer signal vertical scanning frequency beyond the scope of the projector will not put. In scope, to computer vertical scanning frequency set to a high value, the projection effect is good.

The information above is from Shenzhen LCM, LCD, LCD screen, LCD display module manufacturers -- Xingyuhe electronic collection.