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AMBIENT LIGHT SENSING DEVICE AND METHOD, AND INTERACTIVE DEVICE USING SAME

  • US 20180136740A1
  • Filed: 12/27/2017
  • Published: 05/17/2018
  • Est. Priority Date: 08/01/2012
  • Status: Active Grant
First Claim
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1. An ambient light sensing device for receiving at least one visible light image sensed by an image sensor installed within a portable electronic device, wherein the image sensor provides both a photo taking or video recording function and an ambient light sensing function, the ambient light sensing device comprising:

  • an image sampling unit, forobtaining the at least one visible light image from the image sensor, wherein each of the at least one visible light image is one undivided image frame when the image sampling unit obtains the at least one visible light image from the image sensor,dividing the visible light image into a plurality of image blocks according to a predetermined arrangement of sizes and locations of the plurality of image blocks, wherein each image block includes a plurality of pixel units and is located at a different location in the visible light image,extracting at least one sample data in each image block, andcomparing the sample data extracted at different time points of the same image block at the same location to generate a comparison data according to a difference between the sample data extracted at different time points; and

    an analyzing unit, for analyzing the comparison data and generating an output analysis signal accordingly, wherein the output analysis signal includes an ambient brightness signal representing a sensing result of ambient light brightness.

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