In recent years, the OLED screen is widely spread in the mobile phone industry, this undoubtedly benefit from its biggest advantage, namely no backlighting, electricity can be illuminated, wide Angle, high contrast, low power consumption, fast response and wide color gamut, simple process, etc., can be said to be the market at present the latest display technology, and most high cellphone use OLED screen.
Traditional LCD screens use LED backlight layers, which need to adjust the brightness of the screen by changing the backlight current (when high brightness is required, the current is increased, and when low brightness is required, the current is reduced). This brightness adjustment method is DC dimming, also known as DC dimming. Early Samsung AMOLED screens tried full DC dimming, but due to the manufacturing process, it was difficult to achieve the same electrical properties of each pixel. In low brightness, as the current decreases, the electrical differences of each pixel will be highlighted. Therefore, THE performance of AMOLED using DC dimming mode is poor at low brightness, which forces many AMOLED screen manufacturers and display terminal manufacturers to firmly choose a new dimming scheme, namely PWM dimming. In the PWM dimming scheme, the brightness and color temperature of the screen are not achieved by changing the brightness of pixels, but by changing the luminous time of pixels, which greatly avoids the problem of large electrical difference of pixels highlighted due to reduced current, and greatly improves the display effect of AMOLED under low brightness.
PWM is pulse width modulation. The control of screen brightness is actually based on the visual transient effect of human eyes. The principle is that under the condition that all OLED pixel units maintain high display power, the brightness and darkness can be realized by switching on screen to off screen. Many people doubt that the flicker produced by "on and off" will cause damage to the human eye. In fact, because the human eye receives low-frequency flashing stimulation for a long time, it is easy to produce visual fatigue, which may cause discomfort to the eyes and even the body. The IEEE Society of Engineers points out that not all PWM dimmers cause eye damage. When the flicker frequency exceeds 1250Hz, the impact on the human eye is greatly reduced. Therefore, high-frequency PWM not only has advantages over DC dimming low brightness display effect is not good, but also overcomes the problem of low-frequency PWM dimming easy to cause visual fatigue, which can be called the best power partner of OLED screen.
At present, more and more mainstream manufacturers have chosen to carry high frequency PWM dimming technology to achieve high-end screen configuration, such as Huawei P50 E, Honor new machine Magic4 series, Redmi K50 esports version and so on are using PWM dimming. Redmi K50 e-sports edition is equipped with the current PWM maximum stroboscope 1920Hz high frequency dimming, phase correction of the conventional 480Hz, user experience has been greatly improved. In addition, the Display Mate A+ with 15 screen records is undoubtedly the best proof of China's top-notch screen. This flexible straight screen is produced by TCL Huaxing, making TCL Huaxing the only screen manufacturer in China to pass this certification.
Contrary to the initial impression of domestic screens, they have emerged strongly in recent years and are quickly gaining a foothold in the international market. As one of the leading OLED flexible straight screen suppliers, TCL Huaxing has reached in-depth cooperation with many leading enterprises by virtue of its superior technical strength and product strength. According to the report, THE 1,954 PCT international patents released by TCL Huoxing in 2021 ranked 8th in the list of PCT international patents released by global enterprises in 2021, and 4th in China in 2021, leading the whole industry. At present, TCL Huaxing is developing new concept technologies such as multi-fold screen, sliding screen and transparent screen to ensure its leading position in core technologies. In terms of products, it will develop different platform technologies in different applications to provide customers with more competitive products. In the future, we also look forward to more and more "true fragrance" technology brought to us by Chinese creation.
