Image sensing system, and auto clean machine

Abstract

An image sensing system, comprising: a distance determining device, configured to determine whether a distance between an object and an electronic device comprising the image sensing system is larger than a distance threshold or not; and an image sensor, comprising at least one image sensing unit, wherein the image sensor senses images with a first frame rate when the distance is smaller than the distance threshold and senses the images with a second frame rate when the distance is larger than the distance threshold, wherein the first frame rate is different from the second frame rate.

What is claimed is: 
     
         1 . An image sensing system, comprising:
 a distance determining device, configured to determine whether a distance between an object and an electronic device comprising the image sensing system is larger than a distance threshold or not; and   an image sensor, comprising at least one image sensing unit, wherein the image sensor senses images with a first frame rate when the distance is smaller than the distance threshold and senses the images with a second frame rate when the distance is larger than the distance threshold, wherein the first frame rate is different from the second frame rate.   
     
     
         2 . The image sensing system of  claim 1 , wherein the distance determining device comprises a light source, the image sensor, and a control circuit, wherein the control circuit determines whether the distance is larger than the distance threshold or not according at least one image which is generated according to light from the light source and sensed by the image sensor. 
     
     
         3 . The image sensing system of  claim 2 , wherein the light source is a line light source, wherein the control circuit determines whether the distance is larger than the distance threshold or not according a shape formed by the light. 
     
     
         4 . The image sensing system of  claim 3 , wherein the light source is above the image sensor. 
     
     
         5 . The image sensing system of  claim 3 , wherein the light source is below the image sensor. 
     
     
         6 . An auto clean machine, comprising:
 a distance determining device, configured to determine whether a distance between an object and an electronic device comprising the image sensing system is larger than a distance threshold or not; and   an image sensor, comprising at least one image sensing unit, wherein the image sensor senses images with a first frame rate when the distance is smaller than the distance threshold and senses the images with a second frame rate when the distance is larger than the distance threshold, wherein the first frame rate is different from the second frame rate; and   a control circuit, configured to calculate a location of the auto clean machine according to the images.   
     
     
         7 . The auto clean machine of  claim 6 , wherein the distance determining device comprises a light source, the image sensor, and the control circuit, wherein the control circuit determines whether the distance is larger than the distance threshold or not according at least one image which is generated according to light from the light source and sensed by the image sensor. 
     
     
         8 . The auto clean machine of  claim 7 , wherein the light source is a line light source, wherein the control circuit determines whether the distance is larger than the distance threshold or not according a shape formed by the light. 
     
     
         9 . The auto clean machine of  claim 8 , wherein the light source is above the image sensor. 
     
     
         10 . The auto clean machine of  claim 8 , wherein the light source is below the image sensor.