With the progress and development of science and technology, smart TVs are becoming more and more advanced and intelligent. People’s attention to health has also increased with the advancement of technology. Many TVs are popular in the market with blue eyes as the selling point, and have become a consideration for many families with children. Among them, OLED and LED technology are the most concerned.
When the editor of Beibei Market briefly talked about the working principle of LED and OLED.
LED (Light EmitTIng Diode), which is a 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 recombine causing photon emission Generate light. LED can directly emit red, yellow, blue, green, cyan, orange, purple and white light.
OLED (Organic Light-EmitTIng Diode), literally understood as “organic light-emitting diode”. The biggest difference between it and LCD is that it has the property of “self-luminous”. The components of organic light-emitting semiconductors can “light themselves” and do not need the support of “backlight”.
- The light source of OLED TV and LED TV is different, OLED organic self-lighting, LED itself does not emit light.
- The OLED black is more pure and the color gamut is wider. This black is called the black level.
Because OLED has the characteristics of electroluminescence, each pixel can emit light independently, and the light source can be controlled spontaneously. As long as the lighting mechanism is turned off, it can bring true black.
Therefore, there is no possibility of light leakage in the black field, thereby improving the contrast and image quality performance. Therefore, for gamers pursuing the ultimate experience and sense of substitution, only OLED TVs can meet their needs.
The LCD generally achieves the black expression by shielding the white light, so it is very difficult to display the true black. Strictly speaking, LCD TVs do not bring true black. After all, the better the shielding effect, there will still be some light leakage.
In addition, because OLED is self-luminous and close to natural light, it is less harmful to human eyes. The LED display technology will cause some blue hazards to the eyes, which is not suitable for children to watch for a long time.
- The corresponding time of OLED is faster, more than 4000 times higher than LED.
The faster the corresponding time, the less likely it is to cause smear. When we usually watch sports games, we will inevitably encounter the phenomenon of “after-imaging”, and these after-images will frequently appear on high-speed moving objects. The afterimage phenomenon of the LED screen is “unable to eradicate” and can only be avoided as much as possible.
And OLED, because of the “self-illumination” attribute, can directly control the light and dark changes of pixels without having to deflect liquid crystal molecules like LCD. On the expressive power of high-speed dynamic pictures, OLED has a relatively large advantage.
Since 2013, OLED panel technology has gradually matured. From the beginning of positioning high-end to the current price increasingly close to the people, the advantages of OLED TVs have become more and more obvious. In those years, LCD TVs, which defeated traditional CRTs and continued to dominate the TV market for nearly 20 years, must be due to LED TVs? The answer to this question is not absolute!
OLED luminescent materials are extremely poor in anti-oxidation ability after being energized. They are afraid of water and require vacuum glass encapsulation. Therefore, LTPS TFT substrates are required. Therefore, the cost of OLED large-size TVs is relatively high, and they cannot be popularized on a large scale in a short time.
Not only that, because of the different properties of the luminescent materials, the life of the OLED panel is also an urgent problem to be solved. Usually, only 5,000 hours, which is lower than the LCD life of at least 10,000 hours.