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LCD is the English abbreviation of Liquid Crystal Display, that is, liquid crystal display. OLED is Organic Light-emitting Diode, which means organic light-emitting diode. It can be seen from this that LCD and OLED are conceptually different at first. What are the specific differences? The following Liancheng Xiaobian will take you to introduce and analyze these differences one by one.

oled screen and lcd screen difference

The light-emitting principle is different:

The light-emitting principle of LCD mainly relies on the backlight layer, which is the part of the Back-light in the figure. This part is usually composed of a large number of LED backlights. It can only display white light. , that is, the liquid crystal in the picture - the ratio of red, green and blue can be adjusted after the layer, which is what we call the liquid crystal layer. This layer can control the degree of opening and closing by changing the voltage, and the light emitted by the opening and closing is large. more, the smaller the opening and closing, the less light is emitted. To adjust the amount of white light to adjust the ratio of red, green and blue, this is the working principle of the LCD screen.

OLED does not need a backlight layer like an LCD screen, nor does it need a liquid crystal layer that controls the amount of light. It can light up as long as it is powered on, so OLED is like a screen with countless combinations of small colored light bulbs.

The black effect is different:

LCD still has a fatal problem at present, that is, the liquid crystal layer cannot be fully closed, so if the LCD displays black, some light will pass through the color layer, so the black of the LCD is actually a gray mixed with white and black, like You take a white light flashlight and shoot a black film, will the light passing through the film become black light? Certainly not, what you see from the film side is actually a gray with greatly diminishing brightness, not pure black.

Different color effects:

Since LCD has a backlight layer, black is not pure black, so the contrast ratio is difficult to be high. OLED black does not emit light, so you can directly close some pixels in the black area. At this time, the black is almost 0, so the theoretical contrast can be said to be infinite. Here I will summarize the color of OLED in one sentence. OLED is oil painting, the color is pure and delicate, and LCD is watercolor stroke, and the color is hazy and light. All in all, the LCD display is more realistic and supports DC dimming for better eye protection, while the OLED color display is better but prone to visual fatigue.

The display principle is different:

LCD displays rely on a backlight to emit light, and then the light is polarized by the liquid crystal to display different colors; OLEDs do not need a backlight, because the pixels of OLEDs themselves emit light.

The degree of black varies:

Because the LCD display needs a backlight, when it displays black, it actually blocks the light through the polarized crystal, but it is impossible to block the light 100%, so the black of the LCD display is more like gray; while the OLED is different, because the OLED display, Without a backlight, each pixel emits light by itself. When it is displayed in black, the pixel does not emit light. Therefore, the OLED screen can display pure black.

The development history is different:

The crystal used in LCD can be traced back to the end of the 19th century. Austrian botanists discovered a liquid crystal. Under the action of an electric field, the arrangement of the liquid crystal molecules will change, and the optical properties of the liquid crystal will also change. Changes are based on this principle. Later, British scientists invented the world's first crystal display; OLED was much later, based on an organic light-emitting diode, which was invented in 1979 by Chinese-American Professor Deng Qingyun.

Is it possible to bend:

LCD screens cannot be bent, while OLED screens can be bent. Therefore, curved mobile phone screens are mostly composed of OLED screens.

Different viewing angles:

The viewing angle of the LCD is relatively small, while the viewing angle of the OLED screen is larger.

Contrast is different:

The contrast ratio of LCD screens is significantly weaker than that of OLEDs, because OLEDs can go from pure black to pure white, while LCD screens can only go from gray to pure white.

Whether it will burn the screen:

The LCD screen basically does not have the problem of screen burn-in, because the LCD is polarized filtering light; and the OLED screen will burn in, because the screen does not change for a long time, the self-illumination of the OLED screen pixels will correspondingly accelerate the aging of a certain pixel. . This kind of aging is generally irreversible and permanent. Therefore, in order to avoid the occurrence of screen burn-in, it is best not to display the same screen for a long time, or when watching TV with a mobile phone, often switch between horizontal screen and short screen, otherwise, TV The logo will be printed on the screen.

Prices vary:

Because of the relatively mature technology of LCD screen, OLED screen is about twice as expensive as LCD screen under the same size.

Well, the above is the introduction of the difference between LCD screen or display and OLED screen or display organized by LCF Xiaobian for everyone. I hope it will be helpful to everyone. At the same time, everyone is welcome to add and correct. lcf is a world-leading provider of LED display applications and solutions, as well as a national-level specialized, special, and new little giant enterprise. The main business covers "smart city", "cultural tourism business performance", "commercial display project", "content technology" four major sections, with the world's leading automated production equipment and modern post-doctoral research laboratory and perfect sales and services team. Friends who want to buy LED display can also contact us, LCF LED display manufacturer, a big country brand, trustworthy!