What is an oled display?
Organic light-emitting diode: Organic light-emitting display, that is, organic light-emitting display, belongs to a new category on mobile phone LCD, and is called "dream display". Organic light emitting diode display technology is different from the traditional liquid crystal display mode. It does not need backlight, and uses very thin organic material coating and glass substrate. These organic materials will emit light when current passes through them. In addition, the organic light-emitting diode display screen can be made lighter and thinner, with a larger viewing angle, and can significantly save electricity.
At present, among the two major technical systems of organic light-emitting diodes, the low-molecular-weight organic light-emitting diode technology is mastered by Japan, and the so-called OEL of polymer PLEDLG mobile phone is this system, and the technology and patents are mastered by British technology company CDT. Compared with PLED products, colorization is still difficult. Low molecular OLEDs are easier to be colored. Not long ago, Samsung released 65,530 color OLEDs for mobile phones.
However, although the OLED with better technology will replace LCD such as TFT in the future, the OLED display technology still has some shortcomings, such as short life and difficult to enlarge the screen. The well-known LED display technology is a display mode that directly uses LEDs as pixels. Color LED display screen is composed of red, green and blue LEDs, which are arranged in dot matrix. LED display screen usually consists of display module, control system and power supply system. The control system controls the LED to turn on and off, so as to emit different colors of light and then image. Because the diameter of LED is large, the pixel spacing of the same color is also large, forming a point spacing.
The organic light-emitting diode drives the organic thin film to emit light through current, and the light it emits can be red, green, blue, white and other monochromatic colors, and can also achieve full-color effect.
Simply put, LED and organic light-emitting diode have different light-emitting principles and different materials, but both of them have self-luminous characteristics and do not need backlight, so they can be called thin display technology. In addition, the flexible OLED display screen can be bent, curled or even folded.
What is an oled screen?
What is an oled screen? Organic light emitting diode (OLED) is a kind of organic light emitting diode, which belongs to the new product of mobile phone OLED and is known as "dream display".
Organic light emitting diode display technology is different from the traditional liquid crystal display mode. It does not need backlight, and uses very thin organic material coating and glass substrate. These organic materials will emit light when current passes through them. In addition, the OLED display screen can be made lighter and thinner, with a larger viewing angle, and can significantly save power consumption.
Chinese name
Organic light emitting display
Foreign name
Organic light emitting diode display
Another name
Organic light emitting display
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Organic light emitting diode for mobile phone
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Principle, process advantages, practical application and development trend of organic light-emitting diodes
abstract
OrganicLightEmittingDisplay, namely organic light emitting display, belongs to a new category of mobile phone LCD and is known as "dream display".
Organic light emitting diodes are also called the third generation display technology. Organic light-emitting diodes are not only thinner, lower in energy consumption, higher in brightness and better in luminous rate, but also can display pure black and can be bent, such as curved screen TVs and mobile phones. Nowadays, international manufacturers are scrambling to strengthen their investment in research and development of organic light-emitting diode technology, which makes organic light-emitting diode technology more widely used in TV, computer, mobile phone, tablet computer and other fields. [ 1]
principle
The display principle of organic light-emitting diode is essentially different from LCD, mainly driven by electric field, and organic semiconductor materials and luminescent materials emit light through carrier injection and recombination. Essentially, ITO glass transparent electrode is used as the anode of the device, and metal electrode is used as the cathode. Electrons are transferred from the cathode to the electron transport layer through the power supply, and holes are injected from the anode to the hole transport layer, and then migrate to the light-emitting layer. When they meet, excitons are generated, which excite luminescent molecules and generate light sources after radiation. Simply put, an OLED screen is made up of millions of "small light bulbs". [2]
process flow
The preparation technology of organic light-emitting diode display technology requires very high technical level, which is divided into pretreatment and post-treatment, among which the pretreatment is mainly lithography and evaporation technology; Post-processing technology is mainly packaging and cutting technology. Although the advanced OLED technology is in the hands of Samsung and LG manufacturers, many domestic manufacturers are constantly strengthening the research on OLED screens, including Huaxing Optoelectronics, BOE and tianma technology. And they are also increasing their investment in OLED, and organic light-emitting diode products have also been applied to products. Although there is a big gap compared with international giants, it has reached the usable level.
The specific process is as follows:
Pretreatment of indium tin oxide substrate, including the increase of ITO surface flatness and ITO work function;
Adding an auxiliary electrode;
Cathode technology;
Packaging technology, including the development of water-absorbing materials, technologies and equipment. [2]
What's the difference between organic light-emitting diode and MiniLED?
There are essential differences between organic light-emitting diodes and mini-LEDs in display principle. Organic light-emitting diodes have the characteristics of self-luminous pixels and do not need backlight. Mini-LED is still a display technology based on LCD, which needs LED backlight module. However, compared with MiniLED products, organic light-emitting diodes have great weaknesses, such as screen burning and life, while MiniLED does not have this problem. MiniLED is very close to organic light-emitting diodes in display performance and has a longer life.
At present, in the field of MiniLED, HKC has launched a high-end MiniLED esports display PG27 1U with a 4K panel and a refresh rate of 144Hz. The configuration is quite high, but the price is quite close to the people.
Thanks to the MiniLED backlight technology, HKCPG27 1U passed the VEDISPLAYHDR 1000 certification, and the peak brightness reached1000 nits. In terms of color representation, the monitor has a wide color gamut coverage of 100% Adobe RGB, 95% DCI-P3 and 100% SRGB, which can meet the needs of various professional work such as retouching, color matching and post-editing.
Hkpg271u also supports a high refresh rate of 144Hz and a fast response time of 1ms, which greatly reduces the smear phenomenon that players see when facing high-speed moving game screens. The display adopts dual HDMI2. 1+ single DP 1.4 display interface configuration, which can satisfy the bloody output of 4K 144Hz game screen.
As can be seen from the product performance data, HKC can play games for entertainment and cut videos for office work, which not only allows you to enjoy games, but also helps you to improve your work. It's worth it
What is an oled display?
Organic light-emitting diode: Organic light-emitting display, that is, organic light-emitting display, belongs to a new category on mobile phone LCD, and is called "dream display". Organic light emitting diode display technology is different from the traditional liquid crystal display mode. It does not need backlight, and uses very thin organic material coating and glass substrate. These organic materials will emit light when current passes through them. In addition, the organic light-emitting diode display screen can be made lighter and thinner, with a larger viewing angle, and can significantly save electricity.
At present, among the two major technical systems of organic light-emitting diodes, the low-molecular-weight organic light-emitting diode technology is mastered by Japan, and the so-called OEL of polymer PLEDLG mobile phone is this system, and the technology and patents are mastered by foreign technology company CDT. Compared with PLED products, colorization is still difficult. Low molecular OLEDs are easier to be colored. Not long ago, Samsung released 65,530 color OLEDs for mobile phones.
However, although the OLED with better technology will replace LCD such as TFT in the future, the OLED display technology still has some shortcomings, such as short life and difficult to enlarge the screen. At present, Samsung mainly uses OLEDs, such as the newly listed SCH-X339, which uses 256-color OLEDs. As for OEL, LG is mainly used in its CU8 1808280, which we have all seen.