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Comparison of the advantages and disadvantages of LCD and OLED results

Viewed 67 times6-12-2023 03:48 PM

1. OLED lower power consumption

As long as the LCD screen is turned on, the entire screen is fully lit, it will always consume power. Only open the organic light emitting diode (OLED) screen to display a pure white screen,Round LCD the power consumption will be higher than the LCD, but the organic light emitting diode (OLED) screen of each pixel is independent of the control of the brightness and switch, you can reduce the brightness or even turn off the brightness. Therefore, unless you stay in the white screen for a long time, OLED will last longer.

2. OLED has higher contrast ratio.

Contrast refers to the brightness difference between black and white images on a screen. The higher the quality of contrast, the more vivid the picture, the more colorful.

If the LCD is to display pure black, the ideal state is that the liquid crystal molecules are completely closed, completely blocking the emitted backlight, but the deflection of the liquid crystal molecules can not be completely closed.UNB video wall So when displaying black, there will be a small amount of white light, so what you see on the screen is not pure black, but a gray with a sharp drop in brightness. This characteristic determines the LCD can not display the true meaning of pure black.

OLED itself does not have a backlight, and each pixel is independently controlled, so you can directly cut off the power supply to display the black pixels, so there is no light source, realizing the true meaning of pure black.Industrial LCD As a result, OLED screens have a higher contrast ratio.

3. OLED has a faster response time, which gives it an advantage in dynamic display.

When displaying a dynamic screen, it means that each pixel needs to switch colors quickly, and the color switching needs to be done in a certain amount of time, which is managed by what we call the screen response time.

If the response time is too long, a dynamic image will be displayed. When a pixel does not have time to change its color, the last image does not disappear completely. When the next image is displayed, the remaining image will appear on the screen.

The color switching of an LCD screen is accomplished by controlling the deflection of the liquid crystal molecules. Therefore, the deflection speed of the liquid crystal layer directly determines the gray-scale response time of the LCD display, and the deflection of the liquid crystal layer is related to temperature. The lower the temperature, the slower the deflection speed, resulting in low temperature LCD screen appears very obvious drag phenomenon.

OLED screens do not have a liquid crystal layer and are naturally not limited by the temperature of the liquid crystal layer. However, the OLED screen is not no response time, OLED screen in color between switching colors, the response time is very short, almost no drag phenomenon, but the OLED screen from pure black switch to pure white, or from pure white switch to pure black, need to spend time will be much longer than the other colors, but the OLED in the black and white color switching time is also shorter than the majority of the LCD time.

Therefore, the organic light-emitting diode has an inherent advantage in displaying dynamic images on the screen.

4. OLEDs can be thinner and easier to fold

OLED screens do not have a backlight or LCD layer, so they are easy to make thin and can be bent like paper. Being able to bend means it's easy to create a curved screen that significantly improves the texture of the phone itself.

In addition to the backlight and LCD layers, the LCD screen has a number of polarizing plates in the middle of the screen, making it much thicker than an organic light-emitting diode (LED). The backlight and LCD layers are hard substrates that can only be bent very slightly, and can only be seen on large panels such as desktop monitors.

5. OLED has a shorter lifespan.

LCD is used to emit light backlight layer, liquid crystal layer is only responsible for deflection to control the amount of light, the filter layer is only responsible for changing the color of the light, does not participate in the emission of light, the voltage is used to not participate in the emission of light liquid crystal layer.

The screen voltage of the OLED is directly added to the self-light emitting diode (SLD), resulting in frequent electron migration in the OLED's light emitting layer. In addition, the light-emitting layer itself is organic, compared to inorganic material is very easy to aging, so organic + frequent electron migration + self-lighting directly lead to organic light-emitting diode screen life is obviously shorter than the LCD screen.

6. LCD has the disadvantage of light leakage

Since the LCD screen has a backlight layer, and the screen panel will eventually be installed on the phone or monitor, the backlight layer of the backlight is easy to leak in the screen frame connections. When displaying a pure black screen, a large area of the border will appear halo phenomenon, which is known as leakage.

7. OLED is prone to burn-in phenomenon

LCD screen backlight is a whole piece, all the pixels will be aging together. each pixel on the OLED screen will emit its own light, which means that different areas of the screen will be aging at different rates according to the use of the situation.

For example, if area A has been blue for a long time, the blue pixels will age faster. The next time a solid color is displayed, the blue of the place will be slightly darker, resulting in a residual image, as if the screen was burned on the screen, this phenomenon is known as screen burning. This phenomenon is called screen burn-in. It is not the physical burn-in of the screen, but the uneven aging of the pixels that causes the color difference of the screen.

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LCD screen and LED screen: features, advantages and disadvantages comparison and application scenarios

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