Driving apparatus, light source driving apparatus, light source apparatus, projection apparatus, and driving method, suitable for driving load in which value of physical quantity as controlled object periodically changes

Patent metadata

Field	Value
Publication number	US-9599885-B2
Application number	US-201514661980-A
Country	US
Kind code	B2
Filing date	Mar 18, 2015
Priority date	Mar 19, 2014
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A driving apparatus drives a load so as to periodically change a physical quantity as a controlled object. The apparatus includes a calculation unit configured to calculate a deviation between the targeted value and a detection value detected by the detection unit, a storage unit configured to store past deviations calculated by the calculation unit, a determination unit configured to determine a manipulative variable corresponding to the physical quantity, by referring to a past deviation before a predetermined period, which has been stored in the storage unit, and a driving unit configured to drive the load, based on the manipulative variable determined by the determination unit.

First claim

What is claimed is:

1. A driving apparatus which drives a load so as to periodically change a physical quantity as a controlled object, the apparatus comprising:
a setting unit configured to set a targeted value of the physical quantity;
a detection unit configured to detect a present value of the physical quantity;
a calculation unit configured to calculate a deviation between the targeted value and a detection value detected by the detection unit;
a storage unit configured to store past deviations calculated by the calculation unit;
a determination unit configured to determine a manipulative variable corresponding to the physical quantity, by referring to a past deviation before a predetermined period, which has been stored in the storage unit; and
a driving unit configured to drive the load, based on the manipulative variable determined by the determination unit,
wherein the storage unit and the determination unit are added to a proportional integral derivative (PID) control system using the setting unit, the detection unit, and the calculation unit.

2. The apparatus according to claim 1 , wherein the storage unit stores a deviation at a timing when the physical quantity changes stepwise.

3. The apparatus according to claim 2 , wherein the storage unit stores a deviation at a timing when the physical quantity increases stepwise.

4. The apparatus according to claim 1 , wherein the determination unit determines the manipulative variable by adjusting a parameter used for calculation.

5. The apparatus according to claim 1 , wherein the load includes a plurality of types of loads, the storage unit stores past deviations for each load, and the determination unit determines a manipulative variable corresponding to the physical quantity for each load.

6. A driving apparatus which drives a load so as to periodically change a physical quantity as a controlled object, the apparatus comprising:
a setting unit configured to set a targeted value of the physical quantity;
a detection unit configured to detect a present value of the physical quantity;
a calculation unit configured to calculate a deviation between the targeted value and a detection value detected by the detection unit;
a storage unit configured to store past deviations calculated by the calculation unit;
a determination unit configured to determine a manipulative variable corresponding to the physical quantity, by referring to a past deviation before a predetermined period, which has been stored in the storage unit; and
a driving unit configured to drive the load, based on the manipulative variable determined by the determination unit,
wherein an interval during which the load is not driven is included in a cycle, and the determination unit determines a manipulative variable corresponding to the physical quantity in the interval during which the load is not driven.

7. The apparatus according to claim 6 , wherein the storage unit stores a deviation at a timing when the physical quantity changes stepwise.

8. The apparatus according to claim 7 , wherein the storage unit stores a deviation at a timing when the physical quantity increases stepwise.

9. The apparatus according to claim 6 , wherein the determination unit determines the manipulative variable by adjusting a parameter used for calculation.

10. The apparatus according to claim 6 , wherein the load includes a plurality of types of loads, the storage unit stores past deviations for each load, and the determination unit determines a manipulative variable corresponding to the physical quantity for each load.

11. A driving apparatus which drives a load so as to periodically change a physical quantity as a controlled object, the apparatus comprising:
a setting unit configured to set a targeted value of the physical quantity;
a detection unit configured to detect a present value of the physical quantity;
a calculation unit configured to calculate a deviation between the targeted value and a detection value detected by the detection unit;
a storage unit configured to store past deviations calculated by the calculation unit;
a determination unit configured to determine a manipulative variable corresponding to the physical quantity, by referring to a past deviation before a predetermined period, which has been stored in the storage unit; and
a driving unit configured to drive the load, based on the manipulative variable determined by the determination unit,
wherein the determination unit determines a manipulative variable corresponding to the physical quantity of each load at a timing that does not overlap determination of a manipulative variable corresponding to the physical quantity of another load.

12. The apparatus according to claim 11 , wherein the storage unit stores a deviation at a timing when the physical quantity changes stepwise.

13. The apparatus according to claim 12 , wherein the storage unit stores a deviation at a timing when the physical quantity increases stepwise.

14. The apparatus according to claim 11 , wherein the determination unit determines the manipulative variable by adjusting a parameter used for calculation.

15. The apparatus according to claim 11 , wherein the load includes a plurality of types of loads, the storage unit stores past deviations for each load, and the determination unit determines a manipulative variable corresponding to the physical quantity for each load.

16. A driving method of driving a load so as to periodically change a physical quantity as a controlled object, the method comprising:
setting a targeted value of the physical quantity;
detecting a present value of the physical quantity;
calculating a deviation between the targeted value and a detection value obtained in the detection;
storing past deviations calculated in the calculation;
determining a manipulative variable corresponding to the physical quantity, by referring to a past deviation before a predetermined period, which has been stored in the storing; and
driving the load, based on the manipulative variable determined in the determination,
wherein the storing and the determining are performed by a proportional integral derivative (PID) control system which performs the setting, the detecting, and the calculating.

17. A driving method of driving a load so as to periodically change a physical quantity as a controlled object, the method comprising:
setting a targeted value of the physical quantity;
detecting a present value of the physical quantity;
calculating a deviation between the targeted value and a detection value obtained in the detection;
storing past deviations calculated in the calculation;
determining a manipulative variable corresponding to the physical quantity, by referring to a past deviation before a predetermined period, which has been stored in the storing; and
driving the load, based on the manipulative variable determined in the determination,
wherein an interval during which the load is not driven is included in a cycle, and the determining determines a manipulative variable corresponding to the physical quantity in the interval during which the load is not driven.

18. A driving method of driving a load so as to periodically change a physical quantity as a controlled object, the method comprising:
setting a targeted value of the physical quantity;
detecting a present value of the physical quantity;
calculating a deviation between the targeted value and a detection value obtained in the detection;
storing past deviations calculated in the calculation;
determining a manipulative va

Assignees

• Casio Computer Co Ltd

Inventors

• Narikawa Tetsuro

Classifications

• H05B47/10

  Controlling the light source · CPC title

• H04N5/74

  Projection arrangements for image reproduction, e.g. using eidophor · CPC title

• G03B21/2053 Primary

  Intensity control of illuminating light (controlled by video signal processing H04N5/74 or H04N9/31) · CPC title

• G03B21/20

  Lamp housings · CPC title

• H04N9/31

  Projection devices for colour picture display {, e.g. using electronic spatial light modulators [ESLM]} · CPC title