As high-end iPhone screen starts using OLED screens, everyone also gradually understands the screens of iPhones. This article will use the simplest language and pictures to tell you what is the difference between OLED screens and LCD screens. . To know the difference between OLED screen and LCD screen, we need to explain from the operating principle. Let’s first understand the operating principle of these two.
The concept of pixels
First of all, you see that your screen is a complete picture. In fact, when you paste it on the side of the screen, you will find that your screen is actually composed of countless small dots, each of which displays its own Color, spell out a complete picture. Because each pixel is relatively small, so your eyes will mistakenly think that this is a complete picture.
Each pixel has 3 sub-pixels-red, green and blue. We know that the three primary colors red, green and blue can modulate a lot of colors. Our screen is to adjust thousands of colors by adjusting the ratio of the three primary colors of RGB colors.
The imaging principle of the screen should be clear to everyone. The screen is composed of countless points, each point is composed of three sub-pixels of red, green, and blue. All the pixels spell out what you see.
LCD screen backlight and OLED self-illumination
The content of this subtitle is the most important part of the whole article. After understanding this part, you will know the difference between OLED and LCD, so please Look closely at each word.
First of all, here is a design drawing of LCD and OLED. This design drawing is a longitudinal sectional view of each sub-pixel.
The light-emitting principle of LCD mainly depends on the backlight layer. This part is usually composed of a large number of LED backlights. It has only one function, which is to display white light. However, white light cannot form an image, so we Add a layer of colored film on this white backlight layer. The white backlight will show the color after penetrating the colored film.
To adjust the ratio of RGB, we add a control valve between the backlight layer and the color film. This is the liquid crystal layer in the picture, which is what we call the liquid crystal layer. We can change the layer by changing the voltage. Control the degree of opening and closing, so that more light is emitted from a large opening and closing. Meanwhile, less light is emitted from a smaller opening and closing, so that we can control the amount of white light which is RGB. This is the working principle of the LCD screen. It looks like a white light flashlight, with a colored plastic film and an opaque board that is rotatable in front.
As for OLED, OLED does not require a backlight layer like an LCD screen or a liquid crystal layer that controls the amount of light output. As long as it is powered on, it can be bright. Thus, OLED is like a screen with countless small color light bulb combinations.
Disadvantage of LCD screen
The LCD still has a fatal problem, that is, the liquid crystal layer cannot be completely closed. If the LCD displays black, some light will pass through the color layer, so the black of the LCD is actually a mixture of white and black gray, like You take a white light flashlight and shoot a black film. Will the light passing through the film become black light? Definitely not, when you look at the film, it is actually gray with a diminishing brightness, not pure black.
OLED is different. When OLED displays black, you can directly turn off the pixels in the black area to achieve almost pure black effect.
In addition, due to the existence of the backlight layer, the backlight of the LCD display is very easy to leak through the gap between the screen and the frame. This is often referred to as light leakage from the display. It is impossible for the LCD to completely avoid light leakage.
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The above information is shared by Fixsome Phone Repair Service KL Malaysia. Fixsome provide instant phone repair services within whole Klang Valley, Kuala Lumpur area with up to 1-year warranty.
