Author: Lin Fei Source: IT Times
In the 2000 yuan file mid-range smartphones have been widely usedOLED screen,In the field of displays and LCD TVs,Although domestic manufacturers continue to promote cost-effective upgrades in market competition,The price of each OLED and QLEDTV is still a bit expensive。 OLED、QLEDWhat is expensive?What are the advantages of making people excited?
OLED and QLED are very different
OLED and QLED, despite the difference of only one letter in their names, work very differently.
OLED (organic light-emitting semiconductor) display panels use an ultra-thin coating of organic materials attached to a glass substrate or a flexible organic substrate that emits self-light once an electric current is passed, eliminating the need for a backlight like LCD and LED screens.
Since each pixel emits light or closes independently, OLED panels are able to achieve excellent contrast, for example, the pixels in the pure black parts can be completely turned off without generating any light, thus avoiding light leakage caused by the backlight system of LCD panels. While Micro LED TVs can already try to emulate perfect blacks with a large array of backlights that can adjust brightness independently, there is still a chance that slight halos may occur, which does not happen with OLED TVs.
OLED can be divided into two categories: small molecule OLED and polymer OLED (also known as PLED) according to the light-emitting material, and can be divided into active (active drive) according to the drive mode, which is often used in high-resolution products, and passive (passive drive), which is commonly used in smaller size displays.
In addition to contrast, OLED panels also have the advantages of thin and lightweight, high brightness, low power consumption, fast response, high definition, good flexibility and high luminous efficiency.
Despite the "light-emitting diode" in its name, QLED is not actually a true self-emitting technology like OLED, it is actually Samsung's term for promoting its own LCD panel technology called "quantum dot display", which still relies on a backlight.
Quantum are extremely tiny semiconductor nanocrystals that cannot be seen by the naked eye, and when stimulated by light or electricity, quantum dots emit colored light, and the color of the light is determined by the material and size and shape of the quantum dots.
When the quantum dot reinforced film is stimulated by light or electricity, the quantum dots will emit colored light, which can change the color of the light emitted by the light source, and display the color through the light of the dispersed LED light-emitting diode.
Quantum dot display technology is not unique to Samsung, and different manufacturers have different names for the technology. TCL uses the same QLED as Samsung, Hisense uses the technical name ULED, and LG's QNED TV combines quantum dots with NanoCell technology and a mini LED backlight. As for Sony, although it does not directly use the word "quantum dots" in its product naming, the "Triluminos Pro" display technology carried in its high-end TV series includes the application of quantum dot technology.
QLED亮度高寿命长 OLED对比度占优
The maximum brightness of the OLED panel is about 1000nits, which is enough to meet most of the needs. With the support of the backlight system, the brightness of QLED technology has been significantly improved, and some top products can even exceed the peak brightness threshold of 5000nits, which is especially suitable for playing HDR high-definition video and other high-brightness image content.
In terms of color reproduction,OLEDTV can cover a wide color gamut that exceeds the 100%NTSC standard,Rich visual experience。 QLEDThe TV has also successfully achieved a wide color gamut coverage through the use of quantum dot technology, and can even reach greater than 110%NTSC color gamut, which also shows saturated and accurate color performance.
The self-illuminating feature provides a contrast advantage, allowing OLED TVs to deliver extremely deep blacks. And even if the local dimming technology is usedQLEDTV,Due to the reliance on backlight,The black performance is still not as pure and deep as OLEDTV。
In terms of dynamic response speed,OLEDTV has almost no dragging,Especially suitable for playing high-speed action pictures and smooth gaming experience。 In contrast, QLEDs have a slightly slower response time than OLEDs, and slight motion blur may occur.
In addition, OLED TVs have a large viewing angle, and when viewed from different sides, the change in color and brightness remains small, while QLED will have more obvious color and brightness attenuation at a large viewing angle.
In terms of durability,The initial OLEDTV does face a certain risk of pixel burn-in,Especially when the static image is displayed for a long time, it may affect the pixel life,But with the development of technology,This problem has been effectively alleviated。 Compared with OLED, QLED has a theoretically longer service life and is more resistant to long-term static image display due to its use of quantum dot material combined with LCD architecture.
Panel prices remain high
OLEDThe reason why the price of QLEDTVs is higher,The main reason is that the production cost remains high,For examplein the manufacturing process of OLED panels,The yield rate of large-size panels is lower than that of small sizes,Resulting in increased costs,Each pixel needs to emit light independently,Material costs and technical requirements are high。 Although QLED uses quantum dot technology to improve color performance and brightness, high-end QLED TVs also rely on complex nanomaterial fabrication and precise optical design, especially for the application of technologies such as full array local dimming (FALD), which increases the overall cost.
OLED TVs offer near-perfect black performance and ultra-fast response speed, while QLED TVs have excellent performance in brightness, HDR effect and color saturation, both of which use advanced manufacturing processes and technologies to achieve their top picture quality standards, which is one of the reasons why they are expensive.
Of course, high-end TVs not only focus on screen technology, but also include high-end configurations in audio systems, intelligent functions, design processes, etc., so manufacturers usually position OLED and QLED products as flagship levels, so brand image and profit margins will also be considered in pricing strategies.
OLED与QLED选购指南
If you are looking for the ultimate contrast, black performance and fast response time, especially suitable for watching detailed film and television content in dark field, OLED TV may be the first choice. If you value high brightness, a wide color gamut, and long-term stability in large sizes, and your budget allows, QLED TVs may be a better choice.
Or according to the use scenario, OLED TVs work best in home theaters in low-light environments, while QLED will have advantages in rooms with a lot of windows and sunlight.