With more and more mobile phones using OLED screen, we begin to understand the screen of mobile phone gradually. This article will use the simplest language and pictures to tell you the difference between OLED screen and LCD screen. To know the difference between the OLED screen and LCD screen, we need to explain the operation principle, so let’s first understand the operation principle of these two screens.

First of all, you can see that your LCD screen is a complete picture, but in fact, if you stick it on the edge of the screen, you will find that your screen is actually composed of countless small dots, each of which displays its own color and makes a complete picture. Because each pixel is relatively small, your eyes will mistakenly think that this is a complete picture. Each pixel has three subpixels – red, green and blue. We know that the three primary colors, red, green and blue, can be modulated into many colors. Our LCD screen or OLED touch screen can adjust the proportion of the three primary colors to call out thousands of colors. The principle of screen imaging must be clear to you – the screen is composed of countless dots, each of which is composed of three sub-pixels of red, green and blue. Each pixel displays the color by adjusting the color ratio of red, green and blue sub-pixel. Finally, all the pixels spell out the picture you see.

The luminous principle of LCD mainly depends on the backlight layer, which is the back light part in the above figure. This part is usually composed of a large number of LED backlights. It has only one function, that is, to display white light, but white light can not form an image. Therefore, we add a layer of colored film on the white backlight layer, and the white backlight can display color after penetrating the colored film But we need to adjust the ratio of red, green and blue. We can’t let the light go through the red, green and blue directly. So we add a control valve between the backlight layer and the color film, which is liquid in the picture The crystal layer, which is what we call the liquid crystal layer, can control the opening and closing degree by changing the voltage. In this way, the larger the opening and closing is, the more light will be emitted, and the smaller the opening and closing will be, the less light will be emitted. In this way, we can control the amount of white light and adjust the ratio of red, green and blue. This is how the LCD screen works. What it looks like in particular is that you hold a white flashlight, put an opaque board that can be rotated in front of you, and then put a colored plastic film in front of it. For OLED, OLED does not need a backlight layer like LCD screen, nor does it need a liquid crystal layer to control the amount of light. As long as it is powered on, it can light up. Therefore, OLED is like a screen with numerous small color light bulbs.

At present, there is a fatal problem with LCD, that is, the liquid crystal layer can not be completely closed, so if the LCD displays black, some light will pass through the color layer, so the black of LCD is actually the gray mixed with white and black. Just like you shoot a black film with a white flashlight, will the light passing through the film become black light? Certainly not. You can see from the other side of the film that it’s actually gray, which is decreasing in brightness, rather than pure black. OLED is different. When OLED displays black, pixels in black area can be closed directly to achieve the effect of almost pure black. In addition, due to the existence of backlight layer, the backlight of LCD display is very easy to leak out from the gap between the screen and the frame, which is often said that the display leakage, LCD can not completely avoid the phenomenon of light leakage, only the severity. OLED product on szmaclight.com is versatile. 

In general, OLEC display has the following features:

The screen is composed of pixels, and each pixel is composed of three sub-pixels: red, green and blue

The screen displays color by adjusting the ratio of red, green and blue of sub-pixel

LCD imaging principle is to rely on white backlight through the color film color

The principle of OLED imaging is self illumination, so each pixel can work independently

LCD inorganic materials, OLED organic materials, so OLED life is not as good as LCD

OLED is an organic material, and the pixels work independently, so it will burn the screen

The essence of burning screen is uneven screen aging

OLED color is much better than LCD, OLED is oil painting, LCD is watercolor strokes

OLED screen has almost no drags and fast response

The OLED screen adopts PWM dimming. The stroboscopic light under low brightness will make some people feel uncomfortable

OLED pixel density in the same resolution is not as good as LCD

OLEDs are more power efficient, thinner, and can be bent significantly than LCD screens.