The hottest piece of paper is challenging the main

2022-10-14
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This "paper" is challenging the mainstream display

release date: Source: China Electronic News

since this year, electronic paper has not only broken through the black-and-white limit and achieved full-color display, but now it has achieved dynamic video playback. In the future, is it possible for electronic paper to replace LCD as the most widely used and promising new display technology with its own advantages

electronic paper creates new advantages

electronic paper has always been benchmarked against "paper" rather than monitors. However, when the world of electronic paper gradually changes from black and white to color, and when it can play videos stably and smoothly, the traditional LCD is also inevitably challenged

in addition to affecting jaw divergence, McQuay, an analyst at Forrester Research, said that if electronic paper can achieve a leap to color and video display technology, it is expected to replace LCD

now, these two goals have been achieved

since this year, electronic paper has evolved from the original black-and-white, red, black-and-white and yellow to multi-color printed color electronic paper, or even full-color electronic paper. IFLYTEK, Hisense, palm reading ireader and other enterprises have launched color e-readers, and insiders even set 2020 as the "color year" of e-paper. Nowadays, electronic paper has realized dynamic video playback. Recently, South China Normal University and Shenzhen Guohua Photoelectric Technology Co., Ltd. jointly developed a reflective paper-like display that can play full dynamic video and display color images of print quality

once, Li Zhenghao, chairman of e ink technology, an electronic paper R & D and manufacturer, publicly said that the goal of electronic paper is to replace traditional paper, not to compete with LCD, led and other display technologies. However, in a recent interview with China Electronics News, Li Zhenghao's idea has begun to waver. He said: "at present, in addition to the two major technologies of LCD and OLED, we can see that e-paper has begun to occupy a place in the display market, but the current market is still not large enough. It is expected that e-paper will become the third largest technology in the display industry in the future."

launch new challenges to mainstream display

although electronic paper is not as widely used as LCD, led and other display technologies at present, its future development potential should not be underestimated. Insiders believe that electronic paper will take the lead in impacting the LCD market in the field of commercial display by virtue of its own advantages

first of all, based on the bistable principle, the machine cannot judge whether the shutdown signal paper is broken, which is more energy-saving and power-saving than LCD

bistability is to make the black-and-white particles of electronic paper move to a fixed point driven by an electric field, and then stay in place stably without power consumption. In other words, electronic paper only needs to consume a small amount of power when changing the picture, but it does not need to consume power at all when the picture remains stable. Therefore, electronic paper is more energy-saving and friendly to the environment than general display screens

Professor Alex henzen, head of the research and development team of key technologies of color video electrowetting e-paper, said that this kind of e-paper display has several orders of magnitude lower energy consumption than LCD display. In the future, it will be widely used in smart city scenes, including outdoor advertising, traffic information boards, etc., which can further enrich and enhance the application market of commercial display

Zhang Yue, chief of the business planning section of Chongqing BOE Smart Electronic Systems Co., Ltd., believes that in the IOT era, the large number of terminal devices are built with more stringent requirements for low power consumption. Electronic paper is likely to surpass LCD and become the best solution for intelligent display. For example, when electronic paper is applied to bus stop signs, there is no need to dig roads and bury wires, and there is no need to connect mains power. It can be powered and operated only with solar cell energy storage system. Such a convenient and energy-saving way is very helpful to promote the urban vision of green and sustainable development

secondly, based on the reflective principle, electronic paper is more comfortable to watch than LCD

according to Dong min, Deputy Secretary General of China Electronic Video Association, the LCD backlight needs to be continuously lit during the display process. In addition to increasing energy consumption, it is not easy to see the information displayed on the screen in the sun, which is easy to produce visual fatigue. The electronic paper generally adopts the reflection or semi transparent reflection display mode, which does not need a backlight. The information displayed in the sunlight or strong light is clear, and it is closer to the reading effect of the paper, so the vision is not easy to produce fatigue. Dong min explained, "the light source of reflective display technology comes from the environment or external light source. The backlight without continuous energy consumption has low requirements for the environment in addition to reducing energy consumption. Compared with general display technology, which greatly increases the brightness of the backlight in order to remain visible in the sun, the electronic paper of reflective display technology is that the stronger the environmental light source, the better the display effect."

in addition, the changeable appearance of electronic paper may extend its application scenarios to more fields and squeeze the LCD market share

for a long time, LCD has been trying to break through the shackles of morphology, and even hopes to achieve the ideal state of full flexibility, but the effect is not ideal. In contrast, electronic paper is easier to achieve a thin, flexible appearance

now, the world's first flexible full-color electronic paper with OTFT backplane has been published recently. Compared with the conventional glass based TFT backplane, OTFT backplane has better firmness, light and thin characteristics, and is more difficult to break

Dong Min said that after realizing the flexible form, the application scope of full-color electronic paper will be expanded. For example, wearable devices with both light weight and flexibility are a good application choice

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in the final analysis, the market competition between electronic paper and LCD is still a simple technical competition. It has been said that e-paper is still a "transitional technology" at present. Whether in consumer electronics or other fields, e-paper is still in a state of survival in the cracks. In fact, although e-paper has obvious advantages in some aspects, e-paper technology still has some limitations

ceng long, senior analyst of cinno research, said: "First of all, the main problem faced by electronic paper is that the refresh speed is slow, which is generally difficult to achieve within 0.5 seconds, so the sense of time of picture switching is obvious, which is far less smooth than the display effect of LCD screen; second, the phenomenon of black screen or shadow will appear in the process of page turning and refreshing of electronic paper, that is, after using for a period of time, the picture is easy to remain, which is also the key to the difficulty of realizing dynamic video playback before electronic paper; third, electricity Sub paper occasionally distorts when displaying colors and images, which is also the strength of LCD screen; Finally, the color electronic paper technology is still in its infancy and has not been applied in large-scale production. Its cost is much higher than that of black-and-white ink screen. "

Dong min pointed out that the development direction of electronic paper in the future is that the color display experience should catch up with the liquid crystal display, and realize the full flexibility of the extremely wide range of fields touched by the operation of the full-size plastic granulator through material innovation, and continue to optimize the realization of source free ultra-low power consumption through NFC and UHF

"although there are a series of problems in color electronic paper products that limit the popularity of this display technology, with the further maturity of the production process and the gradual decline of the cost, people's understanding and application of color ink screen will be more extensive. In the future, combined with a variety of advantages, accurately positioning the market demand, and driven by suitable application scenarios, it is believed that the color electronic ink screen industry will usher in its own spring." Zhaofeilong, deputy general manager of iFLYTEK reading and writing technology, told

"as a display medium different from LCD, e-paper has great development potential and is not a marginalized chicken rib. Now the LCD field is highly competitive, and the constantly innovative e-paper market is likely to become a new blue ocean." In an interview with China electronic news, Dr. caijuanjuan, chief technology officer of e ink technology, pointed out that it is expected that more resources will be invested in the research and development of e-paper to make the industry more competitive. In the future, e-paper may develop into the third track of the display industry after LCD and led

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