We provide a family of Projected Capacitive Touch control boards for small and large size displays
Projected Capacitive Touch (PCT) displays rely on transparent conductive film layers of Indium Tin Oxide (ITO), patterned on a glass panel in the form of a matrix of row and columns of elementary capacitors. The electrostatic field generated by these elementary capacitors near by the surface of the glass can be perturbed by any conductive material approaching it and results in a change of the value of the elementary capacitance. Touch is about detecting precisely the changes of the elementary capacitance in the corresponding row and column position where the conductive layer has been placed. Proper scanning control, sensing the charges transferred from each elementary pixel and processing the resulting electrostatic 2D image is one of the major function of our CoolTouch™ chipset.
Single chip solution
The CTS30x family is dedicated for small and medium size touch displays and uses our single chip touch controllers TSC561x. They include an 8/12-bit analog front end (AFE) block for charge detection and data conversion as well as a high-voltage driving block for scanning sequentially the rows of the capacitive matrix. They support up to 80×45 channels with a high flexibility of configuration enabling capacitive panels ranging between 10” to 21.5”. They also include embedded 8/32-bit processing units, providing an optimized cost performance ratio for simple touch functionality and basic palm rejection at a report rate of 133Hz.
The CTS10x and CTS12x families are dedicated for medium-to-large and large-to-very large size touch displays respectively. They use a multichip solution built around the TC561x and TC5620x controllers with the TS58xx and TD53xx. The TS58xx are standalone 12/16-bit high-precision Analog Front End (AFE) ICs while the TD53xx are high-voltage drive ICs allowing a proprietary scan of the capacitive matrix. When combined together, they support resolutions up to 128×80 channels (X+Y) for TC561x and 256×160 for TC562x with a high flexibility of configuration enabling projected capacitive panels ranging between 20” to 27” and 27” to 84” respectively.
TC561x is a 32-bit capacitive touch controller allowing medium touch performance while the TC562x is a Digital Signal Processor (DSP) allowing high performance touch features such as scan rates up to 200Hz with multiple fingers capabilities (60+) and advanced objects recognition. They are designed to be used with their companion sense and drive ICs where the sense ICs can be configured in cascaded configuration for extended resolution.