Organic light-emitting diode (organic light-emitting diode) Organic light-emitting diode (organic light-emitting diode), boe 2023 compared to traditional liquid crystal display, organic light-emitting diode can self-light without backlight, and the color is brighter than the liquid crystal display, less power consumption. It sounds like OLeds are very good, and manufacturers only talk about these advantages when they advertise. However, LCDS are still on the market for a reason. Organic light-emitting diodes have several fatal drawbacks, which make it impossible to completely replace liquid crystal displays, or even just a "bridge" in screen history, here's a look at organic light-emitting diode screens.

Introduction - The advantages of organic LED screens

Previously mentioned that OLED has the advantages of different colors more vivid and low power consumption, BOE displays but why China?

One reason OLED screens are superior to LCD screens in this regard is that OLED screens do not require a backlight

The LCD requires a backlit LED as a light source, and the RGB pixels of the LCD do not emit light, so an LED is needed to illuminate the RGB pixels and let the user see the color. However, the pixels of the OLED screen will emit light, oled manufacturer there is no LED backlight, the power consumption will be reduced, the thickness will be thinner, and the black will be darker (the "black" of the LCD is not as black as the "black" of the organic light-emitting diode due to the irradiation of the LED backlight), and because the organic light-emitting diode is made of organic molecules, compared with the rigid semiconductor of the LCD, Organic light-emitting diodes can bend, which makes many manufacturers.

Such as curved screen, fingerprint recognition below the screen.

Introduction - Disadvantages of organic light-emitting diodes

Branding, color decay:

OLED screen will brand, due to the limitation of OLED material, OLED pixels between the service life can be limited, with a long time will produce color decay, branding, such as the following is this only need to use AMOLED screen ASUS Zenfone 3 ZOOM

Several brand areas appear on the screen, such as: QR code, remote LOGO

Flash screen:

A flash screen is a low-frequency flicker on the screen. Although flickering is visually invisible, it is easy to cause visual fatigue due to the dimming mode of organic light-emitting diodes.

Dimming, which refers to the way to adjust the brightness of the screen, comes in two varieties

DC Dimming 2. PWM dimming

pwm dimming technology refers to by adjusting the pulse frequency or pulse width to make the human eye feel that their screen and brightness become dark or bright, the problem is mainly in the continuous flicker, flicker so that part of the community will produce a sense of fatigue, but OLED screens are using PWM dimming, flicker time frequency is mostly around 200HZ; And because PWM dimming is not really brightness, so when the eyes can look directly at the screen, the screen is still displayed with the largest different brightness in China, but the human eye identifies a screen as dark because of blinking.

Dc dimming refers to controlling the brightness of the screen by adjusting the voltage, but it also has disadvantages:

The LED will change different colors due to the change of voltage, so some of our students do not use DC dimming for high-grade LCD screens, but use UHF PWM to adjust the brightness