×

OPTICAL TOUCH SENSING DEVICE AND TOUCH SIGNAL DETERMINATION METHOD THEREOF

  • US 20160085373A1
  • Filed: 12/31/2014
  • Published: 03/24/2016
  • Est. Priority Date: 09/18/2014
  • Status: Active Grant
First Claim
Patent Images

1. An optical touch sensing device, comprising:

  • a light source module, disposed on a touch surface and providing a detecting light to the touch surface;

    at least one image capturing element, capturing an optical touch data along the touch surface based on the detecting light; and

    a processing unit, coupled to the at least one image capturing element to receive the optical touch data, recognizing the optical touch data according a recognition threshold to obtain a plurality of touch signals and a plurality of touch coordinates and a plurality of covering parameters corresponding to the touch signals, and comparing whether an objecting spacing between the touch coordinates is smaller than or equal to a palm spacing,wherein when the object spacing between the touch signals is smaller than or equal to the palm spacing, the processing unit compares the covering parameters corresponding to the touch signals to select a largest covering parameter among the covering parameters and determines whether to ignore the touch signal corresponding to the largest covering parameter according to a relationship between the largest covering parameter and an area threshold.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×