Controlling method for a sensing system

Abstract

A controlling method for a sensing system includes the following step. Whether a specific function is started is determined according to the amount of pixels of a total pattern acquired by sensing a first object. In an embodiment of the present invention, the step of determining whether the specific function is started according to the amount of pixels of the total pattern is the step of determining whether the specific function is started according to the amount of pixels of the total pattern and the length of time to successively acquire the total pattern. Accordingly, it is more convenient for a user to use the sensing system having the said controlling method.

What is claimed is: 
     
         1 . A controlling method for a sensing system, comprising:
 capturing a first image and a second image above a panel from different locations;   extracting a first sub-pattern and a second sub-pattern respectively from the first image and the second image, wherein the first sub-pattern and the second sub-pattern are corresponding to an object above the panel; and   starting an erasing function when a size of a total pattern is greater than or equal to a first predetermined value, wherein the total pattern includes the first sub-pattern and the second sub-pattern.   
     
     
         2 . The controlling method for a sensing system as in  claim 1 , wherein the sensing system comprises the panel, a first image sensor and a second image sensor, the first image sensor and the second image sensor are disposed at the panel, a sensing range of the first image sensor and a sensing range of the second image sensor cover an area of the panel, and the step of starting the erasing function is determined according to an amount of pixels of the total pattern and a length of time to successively acquire the total pattern and comprises:
 (a) the first image sensor and the second image sensor simultaneously sensing the area respectively for acquiring the first image and the second image, wherein the first image comprises the first sub-pattern, the second image comprises the second sub-pattern, the first sub-pattern and the second sub-pattern correspond to the object, and the total pattern is comprised of the first sub-pattern and the second sub-pattern;   (b) determining whether the amount of pixels of the total pattern is greater than or equal to the first predetermined value;   (c) determining whether the length of time to successively acquire the total pattern is greater than or equal to a second predetermined value, if the amount of pixels of the total pattern is greater than or equal to the first predetermined value; and   (d) starting the erasing function if the length of time to successively acquire the total pattern is greater than or equal to the second predetermined value.   
     
     
         3 . The controlling method for a sensing system as in  claim 2  further comprising:
 (c 1 ) calculating and outputting a first coordinate of the object and returning to the Step (a) if the amount of pixels of the total pattern is smaller than the first predetermined value. 
 
     
     
         4 . The controlling method for a sensing system as in  claim 2 , further comprising:
 (d 1 ) calculating and outputting a first coordinate of the object and returning to the Step (a) if the length of time to successively acquire the total pattern is smaller than the second predetermined value.   
     
     
         5 . The controlling method for a sensing system as in  claim 2 , wherein the first image sensor has a plurality of first sensing pixels adapted for sensing the area, the second image sensor has a plurality of second sensing pixels adapted for sensing the area, and the amount of pixels of the total pattern is a sum of an amount of the first sensing pixels corresponding to the first sub-pattern and an amount of the second sensing pixels corresponding to the second sub-pattern. 
     
     
         6 . The controlling method for a sensing system as in  claim 1 , wherein the sensing system comprises the panel, an image sensor, and a reflective mirror element, the image sensor is disposed at the panel, the reflective mirror element is disposed at the panel and mirrors a first area of the panel for forming a second area, a sensing range of the image sensor covers the first area and the second area, and the step of starting the erasing function is determined according to an amount of pixels of the total pattern and a length of time to successively acquire the total pattern and comprises:
 (a) the image sensor sensing the first area and the second area for acquiring a first image, wherein the first image comprises a first sub-pattern and a second sub-pattern, the first sub-pattern and the second sub-pattern correspond to the first object, and the total pattern is comprised of the first sub-pattern and the second sub-pattern;   (b) determining whether the amount of pixels of the total pattern is greater than or equal to the first predetermined value;   (c) determining whether the length of time to successively acquire the total pattern is greater than or equal to a second predetermined value, if the amount of pixels of the total pattern is greater than or equal to the first predetermined value; and   (d) starting the erasing function if the length of time to successively acquire the total pattern is greater than or equal to the second predetermined value.   
     
     
         7 . The controlling method for a sensing system as in  claim 6 , further comprising:
 (c 1 ) calculating and outputting a first coordinate of the object and returning to the Step (a) if the amount of pixels of the total pattern is smaller than the first predetermined value.   
     
     
         8 . The controlling method for a sensing system as in  claim 6 , further comprising:
 (d 1 ) calculating and outputting a first coordinate of the first object and returning to the Step (a) if the length of time to successively acquire the total pattern is smaller than the second predetermined value.   
     
     
         9 . The controlling method for a sensing system as in  claim 6 , wherein the image sensor has a plurality of sensing pixels adapted for sensing the first area and the second area, and the amount of pixels of the total pattern is a sum of an amount of the sensing pixels corresponding to the first sub-pattern and an amount of the sensing pixels corresponding to the second sub-pattern.