Xixin can be tired of the advantages of the old LED-backlit display
Since the second half of the year, LED-backlit displays have become the focus of attention in the industry. Brands have launched new products. Even if there are no new products, they can't wait to announce new plans. From time to time, the media and consumers have gathered their eyes. On the LED-backlit display, everyone has a certain understanding of these products. During this time, we also recommended some LED models to be replaced! LED backlight LCD you have to choose sooner or later, users also show a strong interest, and for LED backlight display what features, we can simply analyze.
The main cost of the liquid crystal display is the liquid crystal panel and the backlight. As we all know, the liquid crystal panel itself cannot be illuminated, which requires all the LCDs to have backlight illumination. The backlight of the liquid crystal display has been mainly CCFL backlight ( Cold cathode fluorescent lamps), most of the products on the market today are such designs, and why the appearance of LED backlights will cause a wave of waves, which is because there are obvious differences between the two backlights, LED backlight The advantages are highlighted and have provided sufficient support for future product technology updates.
There is an essential difference between the LED backlight and the CCFL. The CCFL backlight is a cold cathode lamp in which a Ne+Ar mixed gas containing a trace amount of mercury vapor (a few mg) is enclosed in a glass tube, and the phosphor is coated on the inner wall of the glass. When a high-voltage high-frequency electric field is applied between the two electrodes, the mercury vapor is excited in the electric field to generate an emission luminescence effect, and ultraviolet light having a wavelength of 253.7 nm is emitted, and the phosphor atoms of the inner wall are promoted by ultraviolet excitation. Its energy level emits visible light when the atom returns to the original low energy level (this visible wavelength is determined by the characteristics of the phosphor material). The LED backlight is a blue LED covered with phosphor. The phosphor is excited by a part of blue light to emit yellow light, and the spectrum of the combination of blue light and yellow light is white light. We don't need to have a deep understanding of what these working principles do, but we need to understand briefly what the impact of the two on the product.
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