AlSentis® HSS™ Touch Recognition Technology uses touch signatures, instead of pre-determined capacitive set-points, to sense exactly when a touch happens. This approach to sensing touch overcomes variance like no other electric field touch technology, enabling solutions for:
Water Immune Touch Systems – Full functionality in water spray without false-triggering
Glove Touch Systems – No special gloves required
Noise Tolerant Touch Systems – Passes 10V injected line noise
Temperature– Touch feel is not affected by temperature changes
Low Power Touch Systems – ultra-low power capable without compromising performance
New Touch features – enables new construction methods and user-interface experiences
The Problem of Variance
In a typical capacitive touch system, fingers create changes in an e-field that can be measured, and when the change is enough, a threshold is triggered and a touch is recorded. Because these e-fields are incredibly sensitve, variance can cripple a touch system. The problem is really two fold:
- There are variances other than fingers that can trigger touch thresholds.
- Variance can actually make the thresholds appear to MOVE.
There are lots of things that cause variance in a touch system:
The Design - complex textures, contours, surface finishes
Materials Used - Inconsistencies in density, conductivity, thickness, pliability or opacity..
Manufacturing Process - Imperfections in assembly, grinding, bonding, electronics, decorating or packaging.
How it's Used - Wearing gloves, using thick screen proectors or overlays, or having sweaty hands
Where it's Used - Temperature fluxations, radio interferenece, Splashes from water, saline or other fluids, mud, or dirt
Trying to indicate a precise touch using a threshold in a constantly varying e-field is like trying to hit a moving target through a scope that is constantly changing its magnification. False-touches, not working, and inconsistent feel are just some of the hallmarks of variance, but AlSentis® HSS™ Touch Recognition Technology fundamentally ignores capactive variance.
HSS™ Diagnostic Mode serves as an early-warning system for manufacturing inconsistencies that could impair the quality of a touch system. In HSS™ Diagnostic Mode, the chipset will give a Design Variance Index for a variety of touch system configurations which can be used in end-of-line quality testing to verify that the touch integrated product was manufactured within acceptable tolerances.
Proprietary Electrode Designs
Proprietary Hardware Design
Touch Signature Processing
Unique Manufacturing Approaches