Vibration generating apparatus, operating method thereof, and apparatus including vibration generating apparatus
A vibration generating apparatus comprises a vibration apparatus and a vibration driving circuit including a driving signal generator configured to supply 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 n th 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.
1. A vibration generating apparatus, comprising:
a vibration apparatus; and
a vibration driving circuit configured to supply a driving signal to the vibration apparatus through a line,
wherein the vibration driving circuit comprises:
an amplifier configured to be connected to the vibration apparatus through the line;
at least one temperature sensor disposed at adjacent to the amplifier and configured to output a first temperature value corresponding to a temperature value of an adjacent region of the amplifier; and
a current measurer configured to measure a current value of an nth driving signal flowing in the line;
a temperature predictor configured to receive the current value from the current measurer to output a second temperature value corresponding to the current value; and
a driving signal generator configured to compensate for an (n+1) th driving signal based on at least one or more of the first temperature value and the second temperature value,
wherein the amplifier is configured to amplify the compensated (n+1) th driving signal and supply the amplified driving signal to the vibration apparatus.
2. The vibration generating apparatus of claim 1 , wherein the at least one temperature sensor is disposed within the vibration driving circuit to be spaced apart from the vibration apparatus.
3. The vibration generating apparatus of claim 2 , wherein the at least one temperature sensor is configured to measure a temperature value of at least one or more region adjacent to the amplifier.
4. The vibration generating apparatus of claim 2 , wherein the driving signal generator is configured to:
adjust a frequency-based gain compensation value based on at least one or more of the first temperature value and the second temperature value,
compensate for a frequency-based gain value based on the adjusted frequency-based gain compensation value,
compensate for the (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.
5. The vibration generating apparatus of claim 4 , wherein the vibration driving circuit comprises a temperature measurer configured to measure a circuit internal temperature value, and
wherein the driving signal generator receives the first temperature value from the at least one temperature sensor and adjusts the frequency-based gain compensation value corresponding to the first temperature value.
6. The vibration generating apparatus of claim 5 , wherein the driving signal generator is configured to adjust the frequency-based gain compensation value corresponding to the first temperature value with reference to a first temperature-compensation table including a compensation value corresponding to each circuit internal temperature value.
7. The vibration generating apparatus of claim 4 , wherein the driving signal generator is configured to receive the second temperature value from the temperature predictor and adjust a frequency-based gain compensation value corresponding to the second temperature value.
8. The vibration generating apparatus of claim 7 , wherein the driving signal generator is configured to adjust the frequency-based gain compensation value corresponding to the second temperature value with reference to a second temperature-compensation table including a compensation value corresponding to each prediction temperature value.
9. The vibration generating apparatus of claim 4 , wherein the driving signal generator is configured to adjust the frequency-based gain compensation value corresponding to the first temperature value and the second temperature value with reference to a temperature-compensation table including a compensation value corresponding to each circuit internal temperature value and each prediction temperature value.
10. The vibration generating apparatus of claim 1 , wherein the temperature predictor is configured to output the second temperature value corresponding to a driving signal current value with reference to a current-temperature table including a temperature prediction value corresponding to each driving signal current value.
11. The vibration generating apparatus of claim 1 , wherein at least one current sensor of the current measurer is connected to a portion, which is adjacent to the vibration apparatus, of the line between the vibration driving circuit and the vibration apparatus.
12. The vibration generating apparatus of claim 1 , wherein the vibration apparatus comprises one or more of a piezoelectric element and a film-type vibration apparatus.
13. The vibration generating apparatus of claim 1 , wherein the vibration apparatus includes a vibration portion, and
wherein the vibration portion includes a plurality of first portions including an inorganic material and a plurality of second portions between the plurality of first portions, the second portion including an organic material.
14. The vibration generating apparatus of claim 13 , the vibration apparatus further comprises:
a first electrode layer disposed at a first surface of the vibration portion; and
a second electrode layer disposed at a second surface different from the first surface of the vibration portion.
15. The vibration generating apparatus of claim 13 , wherein the first portion has a piezoelectric characteristic, and
wherein the second portion has a ductile characteristic.
16. An apparatus, comprising:
a vibration member; and
a vibration generating apparatus vibrating the vibration member and comprising a vibration apparatus, and a vibration driving circuit configured to supply a driving signal to the vibration apparatus through a line,
wherein the vibration driving circuit comprises:
an amplifier configured to be connected to the vibration apparatus through the line;
at least one temperature sensor disposed at adjacent to the amplifier and configured to output a first temperature value corresponding to a temperature value of an adjacent region of the amplifier;
a current measurer configured to measure a current value of an n th driving signal flowing in the line;
a temperature predictor configured to receive the current value from the current measurer to output a second temperature value corresponding to the current value; and
a driving signal generator configured to compensate for an (n+1) th driving signal based on at least one or more of the first temperature value and the second temperature value, and
wherein the amplifier is configured to amplify the compensated (n+1) th driving signal and supply the amplified driving signal to the vibration apparatus.
17. The apparatus of claim 16 , wherein the at least one temperature sensor is disposed within the vibration driving circuit to be spaced apart from the vibration apparatus.
18. The apparatus of claim 16 , wherein the driving signal generator is configured to:
adjust a frequency-based gain compensation value based on at least one or more of the first temperature value and the second temperature value;
compensate for a frequency-based gain value based on the adjusted frequency-based gain compensation value;
compensate for the (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.
19. The apparatus of claim 16 , further comprising one or more of a connection member and a plate disposed between the vibration member and the vibration generating apparatus.
20. The apparatus of claim 16 , wherein the vibration member includes a plate, and
wherein the plate includes one of a metal and a single nonmetal or a composite nonmetal of one or more of wood, plastic, glass, cloth, paper, and leather.
21. The apparatus of claim 16 , wherein the vibration member comprises a display panel including a plurality of pixels configured to display an image, or comprises one non-display panel of a light emitting diode lighting panel, an organic light emitting lighting panel, and an inorganic light emitting lighting panel.
22. The apparatus of claim 16 , wherein the vibration member comprises a display panel including a plurality of pixels configured to display an image, or comprises one or more of a vehicle interior material, a vehicle glass window, a building ceiling, a building interior material, a building glass window, an aircraft interior material, and an aircraft glass window.
23. The apparatus of claim 16 , wherein the vibration apparatus comprises one or more of a piezoelectric element and a film-type vibration apparatus.
24. The apparatus of claim 16 , wherein the vibration apparatus includes a vibration portion, and
wherein the vibration portion includes:
a plurality of first portions including an inorganic material; and
a plurality of second portions between the plurality of first portions, the second portion including an organic material.
25. The apparatus of claim 24 , wherein the vibration apparatus further comprises:
a first electrode layer disposed at a first surface of the vibration portion; and
a second electrode layer disposed at a second surface of the vibration portion, the second surface of the vibration portion being different from the first surface of the vibration portion.
26. The apparatus of claim 24 , wherein:
each of the plurality of first portions has a piezoelectric characteristic; and
each of the plurality of second portions has a ductile characteristic.