What are the advantages of OLED screens over LED screens?

Last Update Time: 2019-07-15 10:38:43


In the current TV market, the frequency of updating is getting faster and faster. This is inseparable from the continuous improvement of people's pursuit of better quality. The willingness to purchase has changed from the initial “can be seen” to the current “enjoyment of watching”. Among them, OLED TV has achieved significant growth in the high-end TV market share, and once again stimulated the desire of consumers to purchase.

Most of the questions about LEDs and OLED screens come from the difference between LED TVs and OLED TVs. There are many differences between the two. LED TV refers to a liquid crystal TV that uses LED as a backlight. LED screens rely on the deflection of liquid crystal molecules to control the light transmitted by the backlight to display images, which are inherently insufficient in terms of color performance, contrast, response speed, and viewing angle.


1. Contrast OLED screen can do infinity

From the perspective of contrast, the LED screen cannot control each pixel. When displaying black, it mainly relies on the deflection of the liquid crystal molecules to shield the backlight. Therefore, when the liquid panel displays a black screen, there will be some light leakage, and the ultimate black field cannot be obtained. OLED technology can turn off independent pixels and zero their brightness. In theory, the contrast of OLED technology can be infinite. In the actual display effect, the video content based on the dark scene is the biggest challenge of LED, and OLED can easily deal with it.


2. LED TV light leakage can not be avoided

It is impossible for OLEDs to leak light under the black field, thereby improving contrast and image quality. Therefore, for those who pursue the ultimate experience and sense of substitution, I am afraid that only OLED TV can meet their needs.


3. Screen structure: OLED can be as thin as paper and fold freely

Compared with the complicated LED screen, OLED display technology eliminates the need of backlight support, so the LCD and backlight module are omitted. The structure is very simple, and the body can naturally reach the ultra-thin, which can be used for traditional LED screens. 1/3 thickness. In the future, OLED TVs are expected to achieve thicknesses below 1mm, which is beyond the reach of LEDs.


OLEDs also have flexible and flexible properties that can be applied not only to televisions, but also to smart devices in the future. Combined with the thin characteristics of OLED, the screen can be made as thin as a piece of paper, and can be bent and folded at will, which is unthinkable in the LED era. At present, LG Display, which has been working on OLEDs, has demonstrated the OLED screen that can be crimped and stored last year. Let us see that OLED is not a concept of “thin”, which is another revolution in the display of product form. .


4. Response speed LED screen working mode is destined to be able to eradicate

The response time of the screen usually refers to the speed at which each pixel of the TV reacts to the input signal, that is, the time required for the pixel to turn from dark to bright or from bright to dark. The shorter the time, the faster the screen response time, and the less likely it is to cause smear.

Due to the "innate difference" in the construction of LEDs and OLEDs, LED screens cannot fundamentally solve the image sticking phenomenon by any means or technology. We want to change the brightness of the pixels in the LED screen, we must make a certain deflection of the liquid crystal molecules; and the liquid crystal molecules from the process of receiving the driver chip to change the state of the process takes a certain time, which is what we often say "response time".

At present, the response time of the best LED TV is about 2ms. Therefore, the image sticking phenomenon of the LCD screen is destined to "cannot be eradicated" and can only be avoided as much as possible. In contrast, OLED TVs, because of the "self-illumination" attribute, can directly control the brightness of the pixel points. Therefore, the response speed of OLED is far superior to that of LED. It is basically impossible for the naked eye to see the phenomenon of image sticking. In the performance of high-speed dynamic picture, OLED has a relatively large advantage.


5. Viewing angle OLED can achieve omnidirectional illumination by nature

The external factor that evaluates the quality of a TV is a broader viewing angle. Ideally, there should be no noticeable changes in brightness, color, and contrast. Each pixel of an OLED can be omnidirectionally illuminated like a light bulb. The LED screen relies on the deflection direction to control the light, which leads to the obvious problem of the viewing angle of the early LCD screen. Later, various improvements such as changing the alignment direction of the liquid crystal are basically solved.


In addition, it is worth noting that because the OLED is self-illuminating, the wavelength is closer to natural light, and the damage to the human eye is less; and the LED screen will inevitably cause blue light damage to the eyes, although the short-term viewing effect is not large, but If you have children aged 1-10 in your home, you need to control the time your child watches TV.

OLED technology brings us more exciting innovations and adds more fun to people's audio-visual life. It is for this reason that OLED technology is becoming the trend of the display era.