1, the installation environment requirements:
1) The LED can be installed outdoors, the requirements for the environment are not high, and it is divided into two modes of indoor screen and outdoor screen, the outdoor mode is much more than the indoor brightness, because when the indoor mode, the content displayed on the screen in the sun Under the irradiation of light, it is basically invisible, and the outdoor screen is higher in brightness than the indoor screen, so that the outdoor screen can display the sunlight more clearly, but the power consumption of the corresponding power also increases, because The brightness will increase the power consumption because of the increase in brightness of the LED!
2) The DLP large screen is installed indoors and there is no outdoor screen, and in order to ensure a stable working environment, there are high requirements for air conditioners, etc., and the environment requires good sealing, and there are requirements for dustproof and waterproof.
2. Comparison of display effects:
1) LED screen is divided into single-color, dual-color (can display 3 colors, 2 colors, 1 mixed color), 3 color (full-color screen), LED is the so-called light-emitting diode, LED screen is a diode Display screen, the screen display is similar to the dot matrix word of the previous printer, and is composed of N light-emitting diodes to form a dot matrix. In the dot matrix, some LEDs are off, and some LEDs are off. Differentiate to achieve display effect.
In a single color, only one diode is integrated in each luminous point, and only one light is emitted.
In the case of dual primary colors, each light emitting point integrates two diodes, so that two kinds of light can be emitted. For example, red and green light alone are two kinds of colors, and red and green light together to form a mixed color yellow, which is the third The colors, that is, 2 basic colors, can emit 3 colors of light.
In the three primary colors (full color screen), each point is integrated with three colors, namely red, green and blue, so that a variety of colors can be produced by mixing, that is, full color (various colors).
Since the LED screen is integrated, this leads to a problem that the size of the dot pitch (point-to-point), the size of the integration point (ie, the point where the three LEDs are integrated) determines the fineness and sharpness of the image.
2) DLP is the abbreviation of “Digita lLight Procession”, which means digital light processing, that is to say that this technology first digitally processes the image signal and then projects the light. It is a digital micromirror device (DMD) developed by TI (Texas Instruments) to complete visual digital information display technology. Specifically, DLP projection technology uses digital micromirrors (DMDs) as the primary key processing element to implement digital optical processing. The principle is to pass the cold light source emitted from the UHP bulb through the condenser lens and homogenize the light through the Rod. The processed light passes through a color wheel to divide the light into RGB three colors (or more colors such as RGBW). ), then the color is projected by the lens on the DMD chip, and the final reflection is imaged on the projection screen through the projection lens.
3, LED screen and DLP screen installation space, thermal comparison
LED screen can be installed in a variety of installation methods, such as wall hanging, lifting, bracket installation, for a variety of installation environments can be adapted, the general indoor LED screen thickness can be controlled within 10cm, this is the DLP screen can not be compared;
DLP screen installation is basically a floor stand installation, the general DLP screen space requirements are relatively large, small Japanese Mitsubishi screen, a thickness of 800cm, if you use the former maintenance method is basically 800 thickness on it, in order to To ensure heat dissipation and other requirements (usually air-conditioning under the air supply method, directly into the large-screen base, for the air-conditioning piping, cleanliness have certain requirements), you can leave less than 1m space of 0.5m or more, if the use of post-maintenance space, Then the space will be bigger, and the requirements for air conditioning can be reduced.
4, support for the display format, application of the venue
The LED screen adopts the dot matrix mode. All the fonts are displayed in 1 point and 1 point. This results in a fixed resolution, and the level of the display color (monochrome, bi-color, full-color). The three primary colors) are determined according to the location of the application, as detailed below:
Monochrome screen: mainly used to display text, this screen surface is almost gone, it is being eliminated or faded out of the market, because its color is too single, and in terms of production, price and the bi-color screen is not much difference However, the display effect is not as good as the dual color.
Bi-color screen: mainly used to display text, the advantage of this screen is that you can use red, green, yellow three colors, in the display effect can have a contrast, like the bank's display date with green, business presentation with red , The effect is much better than the single color, does not give a single feeling, the use of dual-color LED screen is more, but most of the release of information-based, like a separate bank, conference slogans, etc., in the market Belongs to the leading product;
Full color screens are now used in more occasions. If they are drawn, they should be classified as non-main products. In the future, one day, technical breakthroughs may be achieved. Full color will become mainstream!
Full-color screen at the supported resolution, similar to a monitor, theoretically all formats can be supported, but still depends on the manufacturers or the software support the format, now the most common text, images, video, animation, etc. format;
Full-color screen is much more expensive than dual-color, and display effect is not as good as DLP screen, but DLP screen is not suitable for outdoor or semi-outdoor state, so its market is still large, like some public places such as square or train station. It is relatively large (usually for commercial use or for large corporations) because its environmental requirements in the outdoor space and the DLP screen are not at a single level;
The DLP screen basically excludes civilian use. Basically, it is used by commercial or state-owned enterprises. Its advantage is that the display effect is realistic. It can be displayed on the computer and can be displayed on the DLP screen. It can also provide hot standby for some high-demand occasions. Like the DLP screen is prone to failure of the light bulb, which is usually a single light bulb working state, such as light bulbs after a problem, another light bulb directly replace the display, display modes diversified, you can achieve a variety of modes to switch, you can display a signal at the same time or Multi-channel signals and signals can also be hot-ready, and their display processing is more professional. In comparison, LED screens are created to fill the DLP market space!
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