How to distinguish OLED and LCD

Analyze the difference between an LCD screen and an oled screen

The screen is an important part of the mobile phone, it is like a human face, showing the user a visual image through the fineness and resolution of the color. At present, the mainstream material of the screen used in mobile phones is to develop mature LCD screens with traditional technology and OLED screens that use the latest technology and popularized in the mobile phone industry. So what is the difference between these two screens?

Here, from several aspects to analyze the difference between OLED and LCD

1. Principle

The principle of illumination of the LCD is mainly the back light layer. This part is usually composed of a large number of LED backlights. It has only one function, which is to display white light, but white light cannot form an image. Therefore, a layer of color is added to the white backlight layer. The film, the white backlight penetrates the colored film to show the color, but also needs to adjust the proportion of red, green and blue, not let the light directly shoot through the red, green and blue, but through the liquid crystal layer, change its The size of the two-pole voltage controls the arrangement of the liquid crystal molecules, so that the light that is emitted and opened is large, and the light that is emitted when the opening and closing is small is small, so that the amount of white light is controlled, so that the red, green, and blue colors can be adjusted. Matching.

The OLED does not require a backlight layer such as an LCD screen, and does not need to control the liquid crystal layer of light output. The OLED can self-illuminate, so the OLED is like a screen with a countless number of small color bulb combinations.

2. Thin and thick

The LCD screen is composed of a backlight layer and liquid crystal, which makes the thickness much thicker than the OLED. OLED screens can be less than 1 mm thick and weigh less. In this respect, OLEDs will be lighter than LCDs, and the phone will feel more textured.

3. Bendability

Due to the presence of the liquid crystal layer and the backlight layer, the LCD screen cannot be bent greatly. The OLED screen itself is a solid state mechanism and has no liquid substance, so it can be fabricated on substrates of different materials, and can be made into a flexible display that can be bent. OLED can be folded almost like an origami. Samsung's curved screen is supported by OLED technology. It should be noted that here is a large bending, desktop curved screen or LCD, you can find that the degree of bending is not large, OLED can be folded in the same way as paper. OLED screens have a wider range of applications than LCD screens.

4. Contrast  

Contrast refers to the ratio of white to black. The higher the contrast, the thicker the picture. The LCD has a backlight layer, and the black color is not pure black. Therefore, the contrast is difficult to be high, and the OLED black does not emit light. Therefore, the black area can be directly turned off. So that it is almost infinitely close to black.

Power consumption

Because of the OLED operates independently, the bright light, the dark dark, the extinguished, But LCD is full of backlight regardless of the color displayed, so the LCD is destined to consume power.

Screen brightness

Because the LCD screen adopts the principle of reflection, it is easy to increase the brightness of the screen by increasing the brightness of the white light of the backlight. But, OLED screens use PWM dimming in their own way. By using the visual residual of the human eye, the brightness and darkness are alternately changed to adjust the brightness, so it is easy to cause interference from external light. Very tired when using Phone.

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