Validating a physical touch event in optical touch screens

摘要

A hybrid optical-physical touch screen is provided herein. The touch screen includes: an electronic panel display; one or more optical sensors coupled to the electronic panel display and configured to determine, a spatial location of a physical object on an X-Y plane near the electronic panel display; a plurality of physical touch sensors coupled to the electronic panel display and configured to determine, a physical touch event between the physical object and the electronic panel display; and a processor configured to compare the determined spatial location of the physical object with the determined physical touch event between the physical object and the display at a same time, and determine, based on predefined parameters, whether an intentional physical touch event between the physical object and the electronic panel display has occurred.

主权项

1. A hybrid optical-physical touch screen configured to distinguish between a touch event and other vibrations, comprising:
an electronic panel display; one or more optical sensors located in and coupled to an optical touch plane, parallel to the plane of the electronic panel display but displaced from it, said one or more optical sensors being configured to determine, a spatial location X-Y of a physical object in the optical touch plane; one or more touch sensors coupled to the electronic panel display and configured to determine a physical touch event between the physical object and the electronic panel display; and a processor configured to compare the determined spatial location of the physical object with the determined physical touch event between the physical object and the display at a same time, and determine, based on predefined parameters associated with the spatial location X-Y, whether an intentional physical touch event between the physical object and the electronic panel display has occurred at the spatial location X-Y, wherein the physical touch sensors are configured to measure a mechanical frequency level of the entire electronic panel display, wherein below the predefined level, the level being predefined for the spatial location X-Y, the processor determines a physical touch event, and above a level of detected mechanical frequency of the electronic panel display, the processor determines other vibrations.