In 2022, the competition between LCD screens and OLED
The development of mobile phone screens seems to be just a war between LCD screens and OLED most of the time. Today, when various mobile phone manufacturers have chosen OLED screens, many mobile phone enthusiasts seem to miss the LCD screen even more. So what are the advantages and disadvantages of LCD and OLED? And, can't LCDs really do screen fingerprints? Today, it will be up to Xiaobian to reveal them for you one by one.
SUMMER
First, the simple science of LCD screen and OLED screen
LCD (Liquid Crystal Display), a liquid crystal display. The structure of LCD is to place the liquid crystal box in two parallel glass substrates, the TFT (thin film transistor) is provided on the lower substrate glass, and the color filter is provided on the upper substrate glass, and the direction of rotation of the liquid crystal molecules is controlled by the signal and voltage change on the TFT, so as to control whether each pixel of polarized light is emitted or not and the display purpose is achieved.
OLED (Organic Light-Emitting Diode), also known as organic laser display, organic light-emitting semiconductors. OLED is a current-type organic light-emitting device, which is a phenomenon of luminescence through the injection and recombination of carriers, and the luminous intensity is proportional to the injected current. Under the action of the electric field, the electrons generated by the anode and the cathode will move, injecting into the hole transport layer and the electron transport layer respectively, and migrating to the light emitting layer. When the two meet in the luminous layer, energy excitons are produced, which excite the luminous molecules to eventually produce visible light.
Second, the advantages and disadvantages of LCD screen and OLED screen are compared
Third, the development of LCD screens and OLED screens
With the advancement of science and technology, LCD and OLED manufacturers are also trying to overcome problems on different types of screens. In terms of screen suppliers, it is reported that Huaxing Optoelectronics has successfully developed an under-screen fingerprint product suitable for LCD panels in 2019, and the world's first LCD screen multi-point fingerprint solution developed by Tianma was officially released in 2020; in terms of mobile phone manufacturers, Redmi President Lu Weibing also revealed in social media that Xiaomi Lab has successfully overcome LCD fingerprint technology. In terms of OLED screen suppliers represented by Samsung, Samsung is also upgrading the screen strength, screen refresh rate and other aspects based on the Samsung AMOLED screen every year, while exploring the screen form of mobile phones including but not limited to folding screens in the future. In terms of mobile phone manufacturers, the under-screen camera technology based on OLED screens and the scroll screen concept products launched by OPPO.
It is worth mentioning that in order to better solve the problems of OLED and LCD screens, screen manufacturers are also trying to explore a new screen form, of which mini-LED is a more ideal screen form: the simple description is by replacing the organic self-light emitting diode in the OLED screen with an inorganic LED bead, so that it can inherit the advantages of OLED and LCD screen at the same time can be better
Circumvent the shortcomings of both. However, because the LED lamp beads of inorganic materials cannot be produced by the process like organic self-light emitting diodes for the time being, but need to be planted one by one, the technology has not really achieved mass production at this stage. Of course, at this stage, there is also mini-LED technology for the transition, by cutting a whole LCD backlight layer, dividing hundreds of areas, thereby improving the contrast of the LCD screen in a certain range. But it can be predicted that with the development of science and technology, the screen of our mobile phones will become more and more suitable for people's daily use in the future.
Produced by the Network Information Department of the Student Union of the Institute of Management and Engineering
Typography | Zhang Miaomiao
Proofreading | Ma Ruoxin
Editor| Cheng Ye
Plumber student assistant
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