US 12,188,757 B2
Wireless charging device and operation method thereof
Ting-Yang Chang, Hsin-Chu (TW); Shih-Wei Kuo, Hsin-Chu (TW); and Yen-Min Chang, Hsin-Chu (TW)
Assigned to PIXART IMAGING INC., Hsin-Chu (TW)
Filed by PIXART IMAGING INC., Hsin-Chu (TW)
Filed on Sep. 14, 2020, as Appl. No. 17/019,884.
Application 17/019,884 is a continuation of application No. 15/349,923, filed on Nov. 11, 2016, granted, now 10,816,321.
Claims priority of application No. 105117191 (TW), filed on Jun. 1, 2016.
Prior Publication US 2020/0408508 A1, Dec. 31, 2020
Int. Cl. G01C 3/08 (2006.01); G01B 11/04 (2006.01); G01S 17/04 (2020.01); G01S 17/08 (2006.01); G01S 17/88 (2006.01)
CPC G01B 11/043 (2013.01) [G01S 17/04 (2020.01); G01S 17/08 (2013.01); G01S 17/88 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wireless charging device, comprising:
a charging module;
at least one proximity sensor configured to sense a proximity status between the wireless charging device and an object and accordingly provide an estimated distance; and
a central controller coupled between the charging module and the proximity sensor and configured to selectively turn on or turn off the charging module according to the estimated distance;
wherein the central controller turns on the charging module when the estimated distance is equal to or smaller than a first threshold, and the central controller controls the charging module to perform wireless charging on the object when the estimated distance is equal to or smaller than a second threshold;
wherein, when the estimated distance is larger than the first threshold, the central controller is configured to control the charging module to be turned off; wherein, when the estimated distance is equal to or is smaller than the second threshold, the central controller is configured to enable the charging module to perform wireless charging on the object; wherein, when the estimated distance is equal to or is smaller than a third threshold, the central controller is configured to turn on a wireless transmission module of the wireless charging device and enable the wireless charging device to perform data transmission with other electronic devices through the wireless transmission module; wherein the third threshold is greater than the second threshold, and the third threshold is less than the first threshold.