Virtual optical touch screen detecting touch distance

摘要

Apparatus and methods are provided for converting a display into a touch display. One or more optical sensors are arranged proximate the display. A processor receives a signal from the optical sensor(s) and, based on the signal, executes instructions for: (i) determining a distance between a pointer device and a surface of the display signal; (ii) determining a position of the pointer device on the surface of the display; (iii) when the distance is less than a threshold detection distance and greater than a threshold touch distance, providing an indication on the display that the position of the pointer device has been determined; and (iv) when the distance is less than the threshold touch distance, taking an action indicative of contact between the pointer device and the surface of the display.

主权项

1. An apparatus for converting a display into a touch display, the apparatus comprising:
at least one optical sensor arranged proximate the display and substantially within a plane defined by a surface of the display, the at least one optical sensor comprising at least one depth sensor and being oriented in a direction parallel to the surface of the display; and a processor configured to receive a signal from the at least one optical sensor, the processor configured to execute instructions for:
(i) determining a first distance between at least one pointer device and a surface of the display, based on the signal;(ii) determining a position of the at least one pointer device on the surface of the display, based on the signal; and(iii) determining that the first distance is less than a threshold touch distance and, in response thereto, taking an action indicative of contact between the at least one pointer device and the surface of the display, wherein the at least one depth sensor comprises a laser projector configured to determine a second distance between the at least one optical sensor and the at least one pointer device, along the surface of the display.