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SuperC-Touch Introduction

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SuperC-Touch Introduction


 

l   Perturbation Resonance

   SuperC Touch’s “Perturbation Resonance” technology enables to magnify capacitive sensing signals but keep the noise unchanged. By way of this method, the ratio of signal over noise (S/N ratio) can be significantly increased, and sensing a signal with a magnitude as small as aF is feasible. It now can be used to overcome ambient noise in capacitive sensing, increase the signal penetration thickness of cover in fingerprint sensing, and significantly increase the height of hovering in self-capacitive touch. Patents regarding the core circuit of this technology have been granted in six areas in the world, including Taiwan, China, United States, Japan, Korea, and European Unit.

 

 

 

l   Off-Chip Capacitance Fingerprint Sensing Technology

    Off-Chip herein stands for a type of fingerprint sensing technology in that the sensor is independently separated from control IC. The sensor electrodes and circuits are manufactured on glass/plastic substrates via display TFT/Array processes, and the sensed signals are transmitted through traces on COF to control IC, which differentiates itself from the current capacitive fingerprint technology that is manufactured on wafers. The advantages of off-chip fingerprint sensing technology encompasses large scale and low cost (one-third of the cost of the current technology), that can challenge and replace the current technology in the market. In addition, off-chip sensor on plastic substrate is bendable, and is good to be used for card market. However, one challenge of making an off-chip fingerprint sensor is that the sensed signals have to pass through long traces before arriving at control IC. The area of a trace line is at least over one thousand times of the area of a sensing pad so that large ambient noises would add on the sensed signals, lowering the sensing and identification capability. The SuperC Touch’s core technology “Perturbation Resonance” has the feature of significantly magnifying the signal and still keeping the noise of the same level. That is the critical technology to overcome this challenge. Therefore, off-chip fingerprint sensor using SuperC Touch’s sensing technology still have superior sensing and identification capability compared to the commercial capacitive ones.

 

 

 

l   In-Cell Touch

  SuperC Touch’s in-cell touch technology is centered on metal mesh. The advantages of in-cell metal mesh encompass low resistivity, lower background capacitance due to smaller capacitance area, simple process, no decrease of transparency and other optical issues if placed on non-displayed area. SuperC Touch’s in-cell technology is applicable in large-scale screen, and new generation displays including LTPS, aSi, narrow border or borderless displays, and flexible displays (AMOLED). For flexible displays, the distance between sensor and cathode may be less than 10um, and that generates a very large background capacitance, decreasing the touch sensitivity. On the other hand, in-cell LCD requires time sharing to solve background noise and capacitance issue, and that may lead to the decrease of display resolution. SuperC Touch now can provide solutions for all the corresponding issues, and has strong patent portfolio in in-cell touch. The number of relevant patents is over 120. In structural design, it comprises of a variety of self and mutual structure for OLED and LCD, including narrow border and high accuracy design. In sensing, it also comprises of solutions for large capacitance and noise issues without time sharing, and hovering. Even at a capacitance of 1nF the touch performance is still superior.

 

 

 

l   3D Touch

  SuperC Touch’s 3D Touch technology is a kind of 2-in-1 solution that integrates touch and 3D touch into one. By an innovative sensing method, SuperC Touch successfully solves the past issue in that touch area and touch force signals are indistinguishable sensed in a single sensor, and the 3D touch sensor has to be moved to the back of display. SuperC Touch’s 3D touch integrates these two panels. It is a solution with cost advantage.

 

 

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