The touch screen originated in the United States in the 1960s and was developed by the US military for military use. After more than 50 years of development, touch screens have been widely used, but only after 2000 have they really entered the mature stage.
The touch all-in-one began to be commercialized in 2010. As the tablet PC enters the high-speed growth stage, the proportion of touch-screen all-in-one applications continues to increase. The global and Chinese touch markets have entered the rapid development of product diversification and brand diversification period. Mobile touch devices: Mobile phones, tablets, etc. have become common carriers for information transmission and reading. At the same time, more and more user information is being carried, and people have raised higher requirements for the touch industry.
However, with the increasing application of touch all-in-ones in the industrial field, and with the gradual formation of information security, biometric technology represented by fingerprint recognition has become a new field in the touch industry in recent years.
Industry technology level: process technology level innovation
In the past ten years, the touch screen industry has undergone different types of development such as sonic, infrared, resistive, and capacitive, and has now formed a relatively mature industry posture. OGS (One Glass Solution): rise in recent years a technique ITO conductive film is directly formed on the protective glass sensors, touch function directly above the sensing circuit etching cover glass, thereby reducing the glass substrate layer With one-time bonding, because of its light transmittance and lightness over ordinary GF, production line investment and product yield have certain advantages over embedded touch screens, which has caused widespread concern in the industry. The advantages of OGS are that after the technology is mature, it can save more costs and reduce the thickness and weight of the touch screen. At present, the major manufacturers of OGS have shifted their research and development directions to large and medium-sized screens. In-Cell: The touch sensing circuit is mounted inside the display panel, and the touch sensor function is embedded in the box formed between the TFT array substrate and the color filter film, which can effectively reduce the use of various materials such as optical glue and increase transparency. Lightness while reducing the thickness of the display device. In-cell technology was first applied to iPhone 5 on a large scale, and it was successful. Thanks to this technology, compared with iPhone4S, the thickness of iPhone5 decreased by 18% to 7.6mm, and the weight decreased by 20% to 112g. From 2014 to 2015, a number of panel and mobile phone manufacturers in the mainland of China have made significant inroads into the In-cell field. The flagship products of Huawei and LeTV are also equipped with In-cell touch systems. In-Cell technology will become one of the competitive advantages for touch screen companies to strive for downstream customer resources in the future. On-Cell: the sensing circuit is mounted on the package surface or glass surface on the AMOLED display panel is a color filter glass, embedded in a simple touch screen by forming a transparent electrode pattern between the color filter and the polarizing plate, only the process Compared with the In-cell technology, the difficulty is reduced, and the product yield can be ensured. The effective display area will not be reduced, and the image quality will be improved. With pressure-touch technology, the device can sense the difference in strength between tapping and tapping, and call up different corresponding functions. Compared to ordinary multi-touch technology, pressure-touch increases the detection of force, which is better than ours. The touch screen X and Y coordinates usually used are added with a Z coordinate. 3D Touch: Multi-point three-dimensional touch technology. 3D touch technology is also a brand new screen touch technology. Through the 3D touch technology, not only can the original pressure touch tap and tap touch functions be added, but also a new "re-press" screen. Dimension function. Multi-point three-dimensional touch technology is equivalent to an upgraded version of pressure touch. It mainly adds a new function of "repress" touch, and other aspects are the same as pressure touch. For domestic manufacturers, the current two technologies of pressure touch and three-dimensional multi-touch are still new areas that need to be breakthroughs in the future. In the future, the development of the touch integrated machine industry mainly depends on technological innovation and breakthroughs in new processes.
Industry technology level: breakthrough of new material technology
With the continuous expansion of touch screen applications, ultra-large size, fast response, and precise control have become the latest requirements for touch screens. To this end, major companies speed up the development of various new materials and try to seize the lead. In recent years, the research and development of new flexible transparent conductive materials such as conductive polymers, nano-silver wires, metal grids, carbon nanotubes and graphene have been continuously strengthened, and the industrialization process has accelerated significantly. Strong, and made gratifying breakthroughs in the field of medium and large size touch screen.
Graphene: Compared with traditional ITO, graphene is rich in raw materials, flexible, and the bending limit depends on characteristics such as substrate bending. It has good light transmittance, low light absorption, low resistivity, and good electrical conductivity. Stable chemical properties and strong weather resistance. In 2014, graphene touch screens received widespread attention. A number of leading display panel manufacturers, including LG and Samsung, and many domestic companies have conducted relevant research. It is worth noting that although the supply of upstream graphene materials has made great progress in terms of price and yield, etc., due to the incomplete development of the downstream supply chain, it is still a while before large-scale industrial applications.
Metal grid: The advantage of metal grid on touch products is that it has lower impedance, and its manufacturing cost, flexibility, light transmission and other characteristics are better than ITO materials, and can be applied to large computers and other computers. Size panel. On the other hand, the shortcomings of unstable yield, high technical requirements, and the impact of display with high-resolution displays will also limit the rapid industrialization of metal grid technology. At present, some domestic touch screen all-in-one machine manufacturers and Japanese manufacturers of metal grid capacitive touch screen products have been shipped, mainly for medium-sized products.
Nano-silver wire: Nano-silver wire has the advantages of small curvature radius, low resistance change rate during bending, and surface resistance can be lower than 50 / sq. Therefore, nano-silver wire has more advantages in large-sized products and curved surface display. The wearable device market is gradually emerging, and the industrialization process of nano-silver materials is gradually accelerating. At present, the application of nanotechnology is mainly applied to large-sized touch screen all-in-one devices such as 86-inch touch all-in-one and 98-inch touch all-in-one devices. Small-sized touch devices are still generally suitable for capacitive touch screens.
Development Trend Market Capacity
Various products in the touch industry are the result of further processing in the production of touch screens. Touch screen is currently the most common and effective way to solve the human-computer interaction problem of consumer electronics products, so the market space in the future is still huge.
Broader downstream markets
With the technological upgrade of touch products, the accelerated penetration of information technologies such as the Internet of Things, cloud computing, and big data, the market application areas of downstream intelligent terminal products are also gradually expanding. Touch products are no longer limited to smart phones, tablets and other products. Smart wearable products including watches, smart car terminals, smart home devices, virtual reality (VR) devices, smart medical care, new retail and other fields are beginning to be applied. Smart touch all-in-one technology. The touch industry will enter a new development stage driven by the strong demand of the consumer electronics industry.
Companies in the industry enter the biometric sensor market
Sensor products are in the development stage of the transition from traditional to new application integration systems. With the development of informatization and technology of smart terminal products, biometric sensing technology is gradually emerging. Among them, fingerprint sensing technology is currently more mature and has a wider range of applications. Fingerprint recognition sensors make up for the shortcomings of traditional password recognition, and can better solve security issues such as mobile payments. As the production of touch all-in-one equipment and other products, micro-camera modules, and fingerprint recognition modules all involve technical fields such as photoelectric signal conversion, optical material processing technology, bonding technology, packaging technology, etc .; all need to be in an ultra-clean and dust-free workshop Production is basically the same. Therefore, in recent years, manufacturers of touch all-in-ones have gradually started to involve in the research and development, production and sales of fingerprint identification module products.
Output Value and Forecast of Touch Industry
In the future, with people's increasing emphasis on national security, public safety, and public interest, the application of touch, camera, and fingerprint recognition technologies will not only be limited to smart electronic consumer products, but smart terminal devices such as touch all-in-ones will also be applied to society and life. The various perspectives and fields extend, and in the future, it will be a smarter and more convenient intelligent touch society.