Multitouch touchless — A new approach with optical proximity sensing
- Resource Type
- Conference
- Authors
- Freidank, Sebastian; Detert, Markus; Hirsch, Soren
- Source
- 2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI) Advances in Sensors and Interfaces (IWASI), 2017 7th IEEE International Workshop on. :145-149 Jun, 2017
- Subject
- Components, Circuits, Devices and Systems
Optical transmitters
Optical receivers
Modulation
Optical reflection
Detectors
Optical detectors
Touchless gesture recognition
Optical proximity sensor
Spread spectrum modulation
- Language
This paper introduces a new approach to detect multiple inputs for touchless human machine interfaces. It is based on optical proximity sensing with visible or infrared light. It is described the principle of modulation, demodulation and system design. In the last part, some applications are presented to use this approach. The approach is based on multiple modulated light sources. The modulation is a form of direct sequence spread spectrum technique. One main advantage of the design is, that only one receiver is needed to detect multiple inputs. This held the system cost low.