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Light-emitting diode (LED) has the characteristics of universality, energy saving and durability.Not surprisingly, it is gaining popularity among all kinds of products in today's market.In the lighting market, household appliance market and commercial display market, "LED" appears frequently, which makes many consumers confused.So, what's the difference between these LED applications?This article shows you how to figure this out.

I. LED Backlight

Currently, there are a lot of so-called LED TVS in the market, but in fact, this term is not accurate, it is not direct use of LED lamp bead luminescence imaging, but the LED is placed behind the LCD panel, used only as a source of light, namely "backlight", therefore, the accurate name of this kind of TV should be LED backlight LCD TV.The pixels themselves do not produce or emit light, and their job is to adjust how much light is transmitted by the backlight.In such applications, most leds use a combination of white or several colors to achieve a wider gamut.

In addition to LCD TVS, leds are also used in projectors to replace older bulbs, which act like the LED backlight on the LCD display.The leds, which are used for projectors, are used as high-intensity light sources (typically red, green and blue leds), which are then modulated by a miniature LCD or DMD (digital mirroring device) and projected onto the screen through the lens.In the hybrid light source, LED and laser are used together to bring higher brightness.

To sum up, when used as backlight, leds exist only as optical engines, not as images created directly.

2. LED Lighting

Leds are ideal for building lighting because of their high efficiency, long life, and environmental friendliness.And because the LED chip is very small, it provides designers with more flexible design space. Therefore, in the market, we can not only see the special LED lamp form (such as LED lamp belt), but also see it exists in the familiar form such as light bulb.LED lighting is already common in home and office environments, and of course is optimized for natural white and diffused lighting.

While there are no actual "white" leds, common LED colors such as amber, red, green and blue can be covered with phosphorescent materials to turn them white.When they are used alone, they can also be used as signals or indicators, such as PC power buttons.

3. LED Displays

For large-screen practitioners, there is no greater concern than this type.LED display screens, also known internationally as "direct vision LED", are made up of LED beads that make up the pixels of the display.For specific use, it can be a separate red, green and blue LED display device, which is usually used in outdoor large display.It can also be a combination of red, green and blue (RGB) into a basic module, which is then assembled into numerous modules to form a large LED display wall.

In general, the process of creating an LED is similar in all applications, with the biggest difference being the encapsulation process.Some leds are specially encapsulated to emit more color, more white or brighter light than other leds.

In addition, in North America and Asia, the sound of the technology is usually taken directly from the LED's three syllables, "el-ee-dee".In Europe, it is usually pronounced "lead" (similar to the pronunciation in zed,ted,bed).