LED, OLED and QLED are three different display technologies, which have significant differences in light-emitting principles, performance characteristics and application scenarios. The following will elaborate on the differences between these three technologies:
I. LED (Light-emitting Diode)
1. Definition and Principle
* LED is the abbreviation of light-emitting diode, and its basic structure is a chip of electroluminescent semiconductor material. The image of LED display is actually still produced by liquid crystal, but the light-emitting diode is used as the light source, so it is also called LED backlight LCD display.
2. Performance characteristics
* Small size, low power consumption, long life, low cost.
* High brightness, long viewing angle, high refresh rate.
* But the color performance is relatively poor, especially in the place where the LCD screen is folded, the color deviation is more obvious.
3. Application scenarios
* Widely used in TV, display, mobile phone, lighting and other fields.
II. OLED (Organic Light-Emitting Diode)
1. Definition and Principle
* OLED is the abbreviation of organic light-emitting diode. The main difference from LED is that OLED can emit light independently without backlight. OLED consists of multiple transparent organic light-emitting diodes. When current passes through, the organic material emits light to form images or text.
2. Performance characteristics
* High transparency: The transparency can reach more than 80%, which is much higher than traditional LCD screens.
* Flexible and curved design: The flexible design of OLED allows the product to present curved, bent or customized shapes.
* Good contrast: Since OLED can emit light independently, the contrast is higher and the black performance is purer.
* Bright colors: It can present richer colors.
3. Application scenarios
* High-end TVs, smartphones, wearable devices and other fields.
III. QLED (Quantum Dot Light Emitting Diodes)
1. Definition and principle
* QLED is the abbreviation of quantum dot light-emitting diodes, which is an active light-emitting display technology based on the principle of quantum dot electroluminescence. Quantum dots are semiconductor nanocrystals with a size between 1nm and 100nm, which have a "quantum confinement effect" and can emit colored light.
2. Performance characteristics
* Ultra-thin: QLED technology can achieve ultra-thin display devices.
* High color gamut: QLED can theoretically reach 140% NTSC color gamut, which is much higher than OLED and LCD.
* Flexible: Similar to OLED, QLED also has flexible characteristics.
* High contrast: Because it is a self-luminous technology, the contrast is significantly better than traditional LCD display technology.
3. Application scenarios
* Mainly used in high-end TVs, monitors and other fields, it is an important development direction of future display technology.
IV. The difference between QLED and QLED (Note: This part may be a bit misunderstood because QLED is usually not compared with itself)
In fact, this may refer to the further distinction between QLED and other display technologies such as OLED. Compared with OLED, QLED may have advantages in color gamut, lifespan and cost. For example, QLED has a wider color gamut and can present more natural colors; at the same time, due to the better stability of quantum dot materials, QLED may have a longer lifespan; in addition, with the continuous advancement of technology and the increase in production, the cost of QLED is also expected to gradually decrease.
In summary, LED, OLED and QLED have their own advantages in terms of light-emitting principle, performance characteristics and application scenarios. With the continuous development of technology, these display technologies will be applied and promoted in more fields.