Why should we choose LCD screen?

What is the difference between LCD and OLED? Why is everyone using OLED?

To know the difference between the two, you first need to understand how LCDs and organic light-emitting diodes work. Simply put, LCDs require a light source, while organic light-emitting diodes are self-luminous.

The basic principle of the work of the LCD to be slightly more complex problem a little, a cell phone LCD screen, the outermost layer is the cover glass, below is the screen liquid crystal layer, the bottom is the LED backlight. LED backlight has only one important role of their own,Round LCD that is, to emit white light, so that the light through the screen liquid crystal layer, through the internal control system to control the size of the voltage range of the liquid crystal layer to regulate the ratio of the three primary colors to display a A variety of different patterns. This may also be a little complex relationship, we can play a is such an analogy, holding as a flashlight without shining, the middle of an opaque plate equivalent to the liquid crystal layer, in front of a piece of colorful plastic packaging film, opaque plate keeps covering off the plastic film does not need to be irradiated, it can fully display the data we want the color.

This principle brings a fatal flaw to LCDs that never display true black, because the LED backlight is always on, no matter what color it displays, and when it displays black, the phone's screen appears gray,UNB video wall and the presence of the backlight causes light to leak from the gap between the screen and the frame, a phenomenon known as light leakage.

In contrast, an organic light-emitting diode works in a much simpler way. It requires neither a backlight nor a liquid crystal layer, and it lights up as soon as it is energized. Organic light-emitting diode screens are like countless small three-color light bulbs that light up wherever they want.Industrial LCD The simple structure allows for a thinner screen, and also allows the organic light emitting diode screen to emit a solid black color because each pixel is individually controllable, so it is simply turned off, which is black. When displaying other colors, it can be brighter and brighter than an LCD screen.

In this sense, OLED has many advantages, so why would anyone choose LCD?

Because OLED screens also have flaws.

OLED each pixel self-illumination is both its advantages and disadvantages. Each pixel for independent, will also develop to cause each pixel's work to learn the length of time is not the same, the aging severity is not the same, which directly caused the phenomenon of screen burning, is through the uneven aging of the screen problems caused by the residual image will have been studying the display.

However, screen burn-in is not the reason why LCD lovers dislike OLED. As long as the brightness is not stimulated to the maximum and do not display the same thing for a long time, the screen burning rate is relatively low. The real reason is the PWM dimming of OLED displays.

To adjust the brightness of an LCD screen, you simply control the voltage to adjust the brightness of the backlight. But low voltage organic light-emitting diode will appear jelly effect, low voltage this road does not work. PWM dimming can be regarded as organic light-emitting diode to save the country's curve, the brightness is unchanged. By changing the time to light up the screen to control the screen brightness. For example, if we adjust the brightness of the organic light-emitting diode screen to 80%, its brightness will not really drop to 80%, but in a certain period of time, the screen will be open 80% of the time, 20% of the time off. This is not noticeable at high brightness, but at low brightness, the screen, which can be seen clearly by the naked eye, will flicker because it is off for too long. Therefore, there is also a claim that organic light-emitting diode screens harm the eyes.

Then each has its own advantages and disadvantages. By definition, LCD and organic light-emitting diode should be two styles of situation. Why are more and more cell phone manufacturers using organic light-emitting diode screens?

Due to the popularity of screen fingerprint technology. Liquid crystal displays cannot be thin due to their working principle, and screen fingerprint technology has a great limitation on the thickness of the screen. When the major manufacturers have adopted screen fingerprint technology, LCD monitors are gradually being used in low-end models, combined with traditional capacitive fingerprint identification technology.

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