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What is the difference between OLED and LCD?

[Advantages of OLED screens]
Thickness: LCD is much thicker than OLED due to the existence of the backlight layer and liquid crystal layer, so OLED screens are very easy to make mobile phones or displays thinner, which has no effect on the display. It is a qualitative leap for mobile phones. The thin screen allows you to insert more components to enhance the experience of other parts
[Flexible degree]
Because of the existence of the liquid crystal layer and the backlight layer, the LCD screen cannot be bent significantly, and the OLED can be folded almost like origami. Samsung's curved screen is supported by OLED technology. It should be noted that the curved screens on desktops are still LCDs. You can find that the degree of curvature is not large. OLEDs can be folded in half like paper.
【color】
Contrast refers to the ratio of white to black. The higher the contrast, the darker the picture. Because LCD has a backlight layer, black is not pure black, so the contrast is difficult to increase. OLED black does not emit light, so you can directly turn off 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 a sentence. OLED is an oil painting with pure and delicate colors, and LCD is a watercolor stroke with hazy and light colors. I think ordinary people can tell the difference between high-end OLED and LCD at a glance.
【Light up alone】
When LCD is turned on, the entire backlight layer is turned on, so LCD is either fully turned on or fully turned off, and each pixel of OLED is independent, so OLED can individually light up certain pixels. This feature can be used to achieve a very convenient Function-Aways on display, after the screen is turned off, a few pixels are lit with low brightness to display time, light up, and notifications, so Samsung phones can know what it is without turning on the screen The app comes with a message, double-clicking the message icon can also light up the screen. This function can greatly reduce the number of times the screen is turned on, which indirectly saves power. Once you get used to it, you will fall in love with this feature.
【Screen response time】
We know that the color of the picture is displayed by the pixels, and it takes time for the pixels to change from color 1 to color 2. This time is called the gray-scale response time. If the gray-scale response time is too long, When you swipe quickly, the pixels are too late to change from color 1 to color 2, which leads to image retention, and there will be smear on the vision, which greatly affects the visual perception. OLED screens hardly have any delay, while LCD screens, even Apple’s Top LCD, the smear or smear.

OLED will have an absolute advantage in performance (display effect). In addition to the advantage of low price, LCD brings damage to the eyes.