Which of the three technologies of touch screen will win?

Which technology will win in cell, On Cell and touch on lens? Now it seems that touch on lens is likely to win in the near future. In addition to Samsung guiding the touch on the lens, TPK in Taiwan Province province of China and Lai Bao Hi-Tech in Shenzhen, China are already preparing to mass-produce the touch screen on the lens. TPK will be in the middle of next year, and Lai Bao may be earlier.

Smartphones and tablets have an endless pursuit of thinness, and touch screens have become the biggest killer of manufacturers. Next-generation touch screen technologies, such as In cell, On Cell and touch on lens, have also become hot spots in the research and development of display related industrial chains. Which technology will win? Now it seems that touch on lens is likely to win in the near future. In addition to Samsung's promotion of touch on lens, TPK in Taiwan Province Province of China and Lai Bao Hi-Tech in Shenzhen, China are already preparing for the mass production of touch on lens touch screens. TPK will be in the middle of next year, and Lai Bao may be earlier.

"Because insel is close to the LCD center, it is easily disturbed, so it is difficult to guarantee the yield of mass production. In addition, the mixed production with CF is also a great challenge to the output. Touch on lens technology, with the increasingly strong anti-interference performance of touch IC, as long as it keeps a distance from the interference source of LCD, the interference of LCD on the sensor will be eliminated, making it easier to achieve mass production. " A senior analyst in the electronics industry explained to Chang Xu, "So, touch on lens can achieve the same thickness and achieve the purpose of being light and short. Especially when the thickness of the cover glass is decreasing. " Moreover, from the current technology, in cell can only use small size, not large size. Touch on lens can do these two things, so it is easier to commercialize on a large scale.

Screen factories in Chinese mainland and Taiwan Province Province will provide Samsung with touch lenses.

At present, one of the touch IC manufacturers whose anti-interference performance can be achieved by touching on the lens is Atmel. "Our maXTouch series touch IC has high signal-to-noise ratio (SNR), supports unshielded touch lens coverage and low-cost charger with noise." Huang Tianhua, senior strategic marketing manager of the company's touch technology business department, said, "The maXTouch series has been used in Samsung's latest generation Galaxy S II phones and tablets such as Galaxy Tab10/,and of course all other major smartphones and tablets."

After confirming that the touch on the lens will become an important trend next year, Atmel will bring consumers a revolutionary and innovative experience on the thin and bright screen-that is, realize the flowing and real stylus writing (active capacitive stylus) on the capacitive screen. It can realize the pen tip of 1mm, the accuracy of 0.25+_, the frame rate of 140Hz, the pressure classification of 256 levels, and the real writing experience. "Even if you press the screen with your palm, it will not affect any writing effect of the pen, just like writing on real paper." Huang Tianhua explained, "Because we have real multi-touch capture and fast microcontroller to achieve effective palm pressure suppression." More importantly, it supports a single-layer ITO sensor, which perfectly combines the general trend of lens touch next year.

The following is an analysis and comparison of three kinds of capacitive screen stylus input pen technologies.

Comparison of three stylus input technologies at present

At present, handwriting input on capacitive screen can be divided into three technologies: inductive pen (EMR), passive capacitance pen and active capacitance pen introduced by Atmel.

Huang Tianhua explained that the sensor pen needs to add a layer of sensor on the touch screen, which not only increases the thickness, but also increases the cost; Of course, industrial design is uglier. Passive capacitive stylus, although the screen thickness remains unchanged and the cost does not increase, only needs a conductive pen, but the nib is larger than 2mm, so the experience is not good. The latest active capacitive stylus does not need inductive sensor and does not increase the screen thickness. The pen tip can reach the accuracy of 1mm and +_0.25, and the frame rate of 140Hz can realize fast writing. At the same time, it has a 256-level stress classification, which can perceive the real writing experience.

How to realize an active capacitive stylus? Therefore, it is necessary to add an MXT100 control chip (maXStylus series) in the pen, and cooperate with Atmel's maXTouch E series controller to realize an approximate real handwriting experience. "Handwritten input is becoming more and more important for smart terminals, especially in Asian countries. Therefore, both Android4.0 and Microsoft's Windows 8 have provided handwriting input support, and MXT100 can support these two OS. " Huang Tianhua said. "Although the existing products using maXTouch E can support active capacitive touch by upgrading, to achieve a perfect experience, it is still necessary to design a new shell. It is expected that there will be terminals supporting active capacitance pen in the first quarter of next year, and now there are samples. "