US 11,750,165 B2
Vibration generating apparatus, operating method thereof, and apparatus including vibration generating apparatus
JunSeok Oh, Paju-si (KR); and MinHo Sohn, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Dec. 10, 2021, as Appl. No. 17/547,553.
Claims priority of application No. 10-2020-0190063 (KR), filed on Dec. 31, 2020.
Prior Publication US 2022/0209733 A1, Jun. 30, 2022
Int. Cl. H04R 3/00 (2006.01); H03G 3/30 (2006.01); H04R 29/00 (2006.01); H04R 1/02 (2006.01); H04R 17/00 (2006.01)
CPC H03G 3/3036 (2013.01) [H04R 1/028 (2013.01); H04R 3/00 (2013.01); H04R 17/00 (2013.01); H04R 29/001 (2013.01); G01K 2217/00 (2013.01); H03G 2201/103 (2013.01); H04R 2430/01 (2013.01); H04R 2499/15 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A vibration generating apparatus, comprising:
a vibration apparatus; and
a vibration driving circuit including a driving signal generator supplying a driving signal to the vibration apparatus,
wherein the driving signal generator is configured to:
adjust a frequency-based gain compensation value based on at least one of a circuit internal temperature value of the vibration driving circuit and a temperature prediction value of the vibration apparatus corresponding to a current value of an nth driving signal,
compensate for a frequency-based gain value based on the adjusted frequency-based gain compensation value,
compensate for an (n+1)th driving signal based on the compensated frequency-based gain value, and
supply the compensated (n+1)th driving signal to the vibration apparatus,
wherein the vibration driving circuit further comprises:
a temperature measurer configured to measure the circuit internal temperature value;
a current measurer configured to measure a current value of the nth driving signal; and
a temperature predictor configured to receive the current value from the current measurer to output the temperature prediction value corresponding to the current value, and
wherein the driving signal generator receives the circuit internal temperature value from the temperature measurer and the temperature prediction value from the temperature predictor and adjusts a frequency-based gain compensation value corresponding to the circuit internal temperature value and the prediction temperature value.