In the current TV market, the advent of new technology products is getting faster and faster. Whether it is a domestic brand or a joint venture brand, new products are launched at the same time. This is inseparable from the continuous improvement of people’s pursuit of better quality. The willingness to purchase has changed from the initial “just watch” 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 buy.
The difference between the LED screen and the OLED screen is not only a letter difference, but the imaging technology of the two is completely different. After reading this article, I believe that you will have a comprehensive understanding of OLED technology.
LED screens and OLED screens have fundamental differences in the principle of illumination.
The full name of the LED is a light-emitting diode. Like the traditional semiconductor industry, an LED display is a display method that controls a semiconductor light-emitting diode. It is usually composed of a plurality of red light-emitting diodes, and the display is dominated by the light of the light to realize text, graphics, images, and animation.
The OLED emits light by driving the organic film itself. OLED is a congenital surface light source technology, and the light emitted can be red, green, blue, white and other monochromatic colours, thereby achieving the effect of full colour, belonging to a new principle of illumination. That’s why it praised because it has the characteristics of “self-illumination”.
As the source of light in LED is not individual for each pixel that’s why displaying a black colour, 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.
Led vs OLED
LED TV light leak cannot 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 substitution, I am afraid that only OLED TV can meet their needs.
Screen structure OLED can be as thin as paper and fold freely
Compared with the complicated structure of the LED screen, the OLED display technology does not require the support of the backlight, so the liquid crystal and the backlight module are omitted, the structure is very simple, and the body can naturally reach the ultra-thin, and the conventional LED screen can be realized. 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 bendable properties that can be applied not only to televisions but also to the imaginative space of 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 already demonstrated the OLED screen that can be curled up.
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 sluggishness.
Due to the “innate difference” in the construction of LEDs and OLEDs, LED screens cannot fundamentally solve the Image Lag phenomenon by any means or technology. To change the response time of LED, we need 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 response cannot be eliminated to a very great extent. In contrast, OLED TVs, due to the “self-illumination” property, can directly control the brightness of pixels. 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 Lag. In the performance of high-speed dynamic picture, OLED has a relatively large advantage.
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, colour, 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, 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.