US 12,463,469 B2
Transmission unit of wireless optical charging system considering user safety
Jin Yong Ha, Seoul (KR)
Assigned to INDUSTRY-ACADEMIA COOPERATION GROUP OF SEJONG UNIVERSITY, Seoul (KR)
Filed by INDUSTRY-ACADEMIA COOPERATION GROUP OF SEJONG UNIVERSITY, Seoul (KR)
Filed on Dec. 27, 2023, as Appl. No. 18/397,487.
Claims priority of application No. 10-2023-0192518 (KR), filed on Dec. 27, 2023.
Prior Publication US 2025/0219456 A1, Jul. 3, 2025
Int. Cl. H02J 50/30 (2016.01); H02J 50/60 (2016.01); H04B 10/80 (2013.01)
CPC H02J 50/30 (2016.02) [H02J 50/60 (2016.02); H04B 10/807 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A transmission unit of a wireless optical charging system considering user safety, the transmission unit comprising:
a light source having at least one of a semiconductor laser and an optical fiber laser, and configured to generate laser light;
an output device having a diffraction grating and a beam scanner, and configured to output the laser light to an outside;
a reflected light output device having a beam splitter, disposed between the light source and the output device, and configured to output reflected light, wherein the reflected light is a part of the output laser light that is reflected from a reception unit and returned; and
a light generation control device having a photo detector and a laser controller, and configured to control a generation of the laser light from the light source according to a result of determining whether a user is located between the transmission unit and the reception unit based on the output reflected light,
wherein the photo detector is configured to generate a current corresponding to the reflected light,
wherein the laser controller is configured to:
control the generation of the laser light from the light source according to a magnitude of the generated current,
generate a generation signal requesting the light source to generate the laser light when the magnitude of the generated current is equal to or greater than a predetermined threshold value, and
generate a stop signal requesting the light source to stop generating the laser light when the magnitude of the generated current is less than the threshold value, and
wherein the light generation control device further includes:
a current comparison device configured to compare whether the magnitude of the generated current is equal to or greater than the threshold value; and
a light source control device configured to transmit the generation signal to the light source when the laser controller generates the generation signal while the magnitude of the generated current is equal to or greater than the threshold value, and transmit the stop signal in other cases.