We often hear what people say about LEDs, LCDs, and OLEDs, but can we really distinguish between them? Today, Xiao Bian has arranged the difference between LEC, LCD and OLED TV for everyone. Let's take a look.
LCD and LED:
Working principle LED (Light Emitting Diode), ie, light emitting diode, is a solid state semiconductor light emitting device. It uses a solid semiconductor chip as a light emitting material. When a forward voltage is applied to both ends, carriers in the semiconductor are recombined to cause photons. It emits light. The LED can emit red, yellow, blue, green, cyan, orange, violet, and white light directly.
LED is a light emitting diode, the English abbreviation of light emitting diodes, referred to as LED. It is a display mode that controls the semiconductor light-emitting diodes. Its approximate appearance is composed of a large number of small lamps that are usually red. The display of characters is based on the lighting of the lamp.
The gamut of the color gamut is currently 72% to 92%, and the color gamut of the LED can reach 118%. LEDs have many advantages such as high brightness, wide color gamut, fast response, and independent switching. In other words, if you replace the traditional CCFL with an LED backlight, the implementation of the ultra-wide color gamut will become very easy.
Price Led than lcd with the same size price is basically more than 1 times more expensive.
Advantages and disadvantages
LCD LCD TV advantages:
1. High display quality 2. No electromagnetic radiation 3. Wide range of applications 4. Digital interface 5. Low power consumption
Disadvantages of LCD TVs:
1. The viewing angle of the LCD is relatively small compared to the CRT display.
2, in the display reaction speed, the traditional display due to technical advantages, the reaction speed is very good.
3, LCD response time is relatively long, so the performance in the dynamic image is not ideal.
4. The yield of its manufacture is relatively low.
5, display quality: LCD theoretically only significant 18-bit color (about 262144 colors), but the color depth of the 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 stylish.
3, energy saving and environmental protection, energy consumption 52% lower than the cold cathode backlight, and there is no mercury contamination of the cold cathode tube.
4, long life, reaching nearly 100,000 hours, open 10 hours a day, then you can use 27 years.
5, can reach 100000:1 ultra-high contrast, higher resolution.
LED LCD TV disadvantages:
1. The sense of hierarchy and dynamic performance are unsatisfactory.
2, the depth of the picture is not obvious.
LCD and OLED:
For improving the color effect of the liquid crystal display, the emergence of LED backlight is indeed one of the best ways to solve this problem. However, in addition to LED backlighting, OLEDs appear to have more advantages. Since LEDs are similar to OLEDs, many people believe that LEDs and OLEDs are the same technology. In reality, LEDs and OLEDs 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 drive, electrons and holes are injected into the electron transport layer and hole transport layer from the cathode and the anode, respectively, and then migrate to The luminescent layer, which forms excitons after encountering, excites the luminescent molecule, which emits visible light after irradiation.
The radiation can be observed from the ITO side, and the metal electrode film also serves as a reflective layer. Compared with LCDs, OLEDs have lower cost, fast response response times of microseconds, wide viewing angles, and wide viewing angle widths of over 170 degrees above and below. Moreover, OLEDs can theoretically display infinite colors. , And because there is no effect of the backlight, so when the pixels are displayed in black, you can also achieve a full black screen, there are certain advantages in the contrast.
Compared with the most commonly used LCDs, OLEDs have the advantages of thin panel, high contrast ratio, fast response speed, low power consumption, wide viewing angle, and light weight. The advantages that are particularly worth mentioning are that OLED screens can be bent, folded, and can even be like A piece of paper is hung on the wall and placed in a pocket so that it is embedded in the clothes. When not in use, it is part of the clothes. If necessary, the necessary information can be displayed. Therefore, OLED is recognized as the terminator of LCD destiny, it can also be called the "star of tomorrow" in the field of flat panel display.
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LCD and LED:
Working principle LED (Light Emitting Diode), ie, light emitting diode, is a solid state semiconductor light emitting device. It uses a solid semiconductor chip as a light emitting material. When a forward voltage is applied to both ends, carriers in the semiconductor are recombined to cause photons. It emits light. The LED can emit red, yellow, blue, green, cyan, orange, violet, and white light directly.
LED is a light emitting diode, the English abbreviation of light emitting diodes, referred to as LED. It is a display mode that controls the semiconductor light-emitting diodes. Its approximate appearance is composed of a large number of small lamps that are usually red. The display of characters is based on the lighting of the lamp.
The gamut of the color gamut is currently 72% to 92%, and the color gamut of the LED can reach 118%. LEDs have many advantages such as high brightness, wide color gamut, fast response, and independent switching. In other words, if you replace the traditional CCFL with an LED backlight, the implementation of the ultra-wide color gamut will become very easy.
Price Led than lcd with the same size price is basically more than 1 times more expensive.
Advantages and disadvantages
LCD LCD TV advantages:
1. High display quality 2. No electromagnetic radiation 3. Wide range of applications 4. Digital interface 5. Low power consumption
Disadvantages of LCD TVs:
1. The viewing angle of the LCD is relatively small compared to the CRT display.
2, in the display reaction speed, the traditional display due to technical advantages, the reaction speed is very good.
3, LCD response time is relatively long, so the performance in the dynamic image is not ideal.
4. The yield of its manufacture is relatively low.
5, display quality: LCD theoretically only significant 18-bit color (about 262144 colors), but the color depth of the 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 stylish.
3, energy saving and environmental protection, energy consumption 52% lower than the cold cathode backlight, and there is no mercury contamination of the cold cathode tube.
4, long life, reaching nearly 100,000 hours, open 10 hours a day, then you can use 27 years.
5, can reach 100000:1 ultra-high contrast, higher resolution.
LED LCD TV disadvantages:
1. The sense of hierarchy and dynamic performance are unsatisfactory.
2, the depth of the picture is not obvious.
LCD and OLED:
For improving the color effect of the liquid crystal display, the emergence of LED backlight is indeed one of the best ways to solve this problem. However, in addition to LED backlighting, OLEDs appear to have more advantages. Since LEDs are similar to OLEDs, many people believe that LEDs and OLEDs are the same technology. In reality, LEDs and OLEDs 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 drive, electrons and holes are injected into the electron transport layer and hole transport layer from the cathode and the anode, respectively, and then migrate to The luminescent layer, which forms excitons after encountering, excites the luminescent molecule, which emits visible light after irradiation.
The radiation can be observed from the ITO side, and the metal electrode film also serves as a reflective layer. Compared with LCDs, OLEDs have lower cost, fast response response times of microseconds, wide viewing angles, and wide viewing angle widths of over 170 degrees above and below. Moreover, OLEDs can theoretically display infinite colors. , And because there is no effect of the backlight, so when the pixels are displayed in black, you can also achieve a full black screen, there are certain advantages in the contrast.
Compared with the most commonly used LCDs, OLEDs have the advantages of thin panel, high contrast ratio, fast response speed, low power consumption, wide viewing angle, and light weight. The advantages that are particularly worth mentioning are that OLED screens can be bent, folded, and can even be like A piece of paper is hung on the wall and placed in a pocket so that it is embedded in the clothes. When not in use, it is part of the clothes. If necessary, the necessary information can be displayed. Therefore, OLED is recognized as the terminator of LCD destiny, it can also be called the "star of tomorrow" in the field of flat panel display.
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