We often hear people say LEDs, LCDs and OLEDs, but can we really distinguish between them? Today, Xiaobian has arranged the difference between LEC, LCD and OLED TV for everyone. Let's take a look.
LED (Light EmitTIng Diode), a semiconductor solid-state light-emitting device, uses a solid semiconductor chip as a light-emitting material. When a forward voltage is applied to both ends, carriers in the semiconductor recombine to cause photon emission. Produce light. The LED can directly emit red, yellow, blue, green, cyan, orange, purple, and white light.
LED is light emitTIng diode, the abbreviation of LED, referred to as LED. It is a way of controlling the display of a semiconductor light-emitting diode. The approximate appearance is that it consists of a number of small lights, usually red, which are displayed by the light on and off.
Color gamutThe color gamut of LCDs is currently 72% to 92%, while the color gamut of LEDs can reach 118%. LED has many advantages such as high brightness, wide color gamut, fast response, and independent switching. In other words, if the LED backlight is replaced by a traditional CCFL, the implementation of the ultra-wide color gamut will become very easy.
priceLed is more than 1 times more expensive than lcd.
Advantages and disadvantagesLCD LCD TV advantages :
1, the display quality is high
2, no electromagnetic radiation
3, a wide range of applications
4, digital interface
5, low power consumption
LCD LCD TV disadvantages :
1. The viewing angle of the LCD is relatively small compared to the CRT display.
2. In the display reaction speed, the traditional display has a very good response speed due to technical advantages.
3, LCD response time is relatively long, so the performance in dynamic images is not ideal.
4. The yield of its manufacture is relatively low.
5, display quality: LCD theoretically can only display 18-bit color (about 262,144 colors), but the color depth of CRT is almost infinite.
6, LCD display is relatively fragile and vulnerable to damage.
LED LCD TV advantages:
1, super wide color gamut, can reach 105% NTSE color gamut, so the color is more vivid.
2, ultra-thin appearance, the thinnest to 1.99 cm, more fashionable.
3, energy saving and environmental protection, energy consumption is 52% lower than cold cathode backlight, and there is no mercury pollution of cold cathode tubes.
4, long life, reaching nearly 100,000 hours, if you open 10 hours a day, you can use 27 years.
5, can achieve 100000:1 ultra-high contrast, higher definition.
LED LCD TV disadvantages:
1, the sense of hierarchy and dynamic performance is not satisfactory.
2. The depth of the picture is not obvious.
LCD and OLED
The emergence of LED backlighting is indeed one of the best ways to solve this problem in terms of improving the color effect of liquid crystal displays. However, in addition to LED backlighting, OLEDs appear to be more advantageous. Since LEDs are similar to OLEDs, many people think that LEDs and OLEDs are the same technology. But in fact, LED and OLED are completely different things.
The working principle of OLED is to use ITO glass transparent electrode and metal electrode as the anode and cathode of the device respectively. Under a certain voltage, electrons and holes are injected from the cathode and the anode to the electron transport layer and the hole transport layer, respectively, and then migrated to the respective layers. The luminescent layer, when met, forms excitons to excite the luminescent molecules, and the latter emits visible light after being irradiated.
Radiation light can be observed from the ITO side, and the metal electrode film also acts as a reflective layer. Compared with LCD, OLED has lower cost and fast response response time of microseconds. It has wide viewing angle characteristics, and the viewing angles of up and down and left and right are over 170 degrees. In addition, since OLED can theoretically display infinite colors. And because there is no backlight effect, when the pixel is displaying black, it can also achieve a full black picture, which has certain advantages in contrast.
Compared with the most popular LCD, OLED has thin panel, high contrast, fast response, low power consumption, wide viewing angle and light weight. Especially worth mentioning is that OLED screen can be bent, folded, or even like A piece of paper hangs on the wall, in the pocket, and even in the clothes, when it is not part of the clothes, when necessary, can display the necessary information. Therefore, OLED is recognized as the terminator of LCD destined, and it can also be called the "star of tomorrow" in the field of flat panel display.
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