JP-7857207-B2 - Drive unit and drive method

Inventors

• 坂元 亮太
• 横堀 匠

Assignees

• 旭化成エレクトロニクス株式会社

Dates

Publication Date

20260512

Application Date

20221104

Priority Date

20220120

Claims (13)

1. A calculation unit that calculates the amount of drive of the optical element based on the detection position of the optical element and the target position of the optical element, A correction unit receives the drive amount, the detection position, and the target position as inputs, generates a corrected drive amount by correcting the drive amount based on the drive amount, a parameter corresponding to the tilt of the optical element, and either the detection position or the target position, and outputs the drive amount and the corrected drive amount. A first drive unit provides a first drive force corresponding to either the drive amount or the corrected drive amount to a first drive source among a plurality of drive sources for moving the optical element in a predetermined direction. A second drive unit that provides a second drive force corresponding to the other of the aforementioned drive amount and the aforementioned corrected drive amount to a second drive source among the plurality of drive sources, A drive device equipped with the following features.
2. The drive device according to claim 1, wherein the correction unit corrects the drive amount based on a function of the detected position.
3. If we define the predetermined first coefficient as "coefficient 1" and the predetermined second coefficient as "coefficient 2", The correction unit corrects the drive current corresponding to the drive amount calculated by the calculation unit using the formula "Corrected drive current = drive current × coefficient 1 + drive current × detection position × coefficient 2". The drive device according to claim 2.
4. The drive device according to claim 1, wherein the correction unit corrects the drive amount using a predefined correction table based on the detection position and the drive amount.
5. The drive device according to claim 1, wherein the correction unit corrects the drive amount based on a function of the target position.
6. If we define the predetermined first coefficient as "coefficient 1" and the predetermined second coefficient as "coefficient 2", The correction unit corrects the drive current corresponding to the drive amount calculated by the calculation unit using the formula "Corrected drive current = drive current × coefficient 1 + drive current × target position × coefficient 2". The drive device according to claim 5.
7. The drive device according to claim 1, wherein the correction unit corrects the drive amount using a predefined correction table based on the target position and the drive amount.
8. The drive device according to any one of claims 1 to 7, wherein the correction unit is configured to be switchable between using either the detection position or the target position for correcting the drive amount.
9. The drive device according to claim 8, wherein the correction unit has a switching unit that switches between correction using either the detection position or the target position, and correction without using the detection position or the target position, depending on the characteristics of the first drive source and the second drive source.
10. The correction unit selects which of the plurality of drive sources to use as a reference for correcting the drive amount based on a parameter corresponding to the tilt of the optical element, according to any one of claims 1 to 7.
11. The drive device according to claim 10, wherein the parameter corresponding to the tilt indicates the tilt of the optical element detected when the maximum current is applied to each of the plurality of drive sources.
12. The drive device according to any one of claims 1 to 7, wherein the calculation unit calculates the drive amount by feedback control using the detected position and the target position.
13. A driving method for driving a plurality of drive sources, including a first drive source and a second drive source, Detecting the tilt of an optical element, To generate parameters corresponding to the tilt of the optical element, The system detects the position of the optical element and outputs the detected position. The amount of drive of the optical element is calculated based on the detection position of the optical element and the target position of the optical element. A corrected drive amount is generated by correcting the drive amount based on the drive amount, a parameter corresponding to the tilt of the optical element, and either the detection position or the target position. Based on a parameter corresponding to the tilt of the optical element, select which of the first and second drive sources to drive with a driving force corresponding to the corrected drive amount, A drive method equipped with

Description

This invention relates to a drive device and a drive method. Patent Document 1 states that "the controller applies a predetermined offset force to the driving force generated by one drive source, and controls the driving force of the other drive source to compensate for the imbalance in driving force caused by the offset force." [Prior art documents] [Patent Documents] [Patent Document 1] Japanese Unexamined Patent Publication No. 2018-045484 In a first embodiment of the present invention, a drive device is provided. The drive device may include a calculation unit that calculates the drive amount of the optical element based on the detection position of the optical element and the target position of the optical element. The drive device may also include a correction unit that receives the drive amount, the detection position, and the target position as input, generates a corrected drive amount by correcting the drive amount based on the drive amount, a parameter corresponding to the tilt of the optical element, and either the detection position or the target position, and outputs the drive amount and the corrected drive amount. The drive device may also include a first drive unit that provides a first drive force corresponding to either the drive amount or the corrected drive amount to a first drive source among a plurality of drive sources for moving the optical element in a predetermined direction. The drive device may also include a second drive unit that provides a second drive force corresponding to either the drive amount or the corrected drive amount to a second drive source among the plurality of drive sources. The correction unit described above may correct the drive amount based on a function of the detected position. If a predetermined first coefficient is designated as "Coefficient 1" and a predetermined second coefficient as "Coefficient 2," the correction unit may correct the drive current corresponding to the drive amount calculated by the calculation unit using the formula "Corrected drive current = Drive current × Coefficient 1 + Drive current × Detection position × Coefficient 2." The correction unit described above may correct the drive amount using a predefined correction table based on the detection position and the drive amount. The above correction unit may correct the drive amount based on a function of the target position. If a predetermined first coefficient is designated as "Coefficient 1" and a predetermined second coefficient as "Coefficient 2," the correction unit may correct the drive current corresponding to the drive amount calculated by the calculation unit using the formula "Corrected drive current = Drive current × Coefficient 1 + Drive current × Target position × Coefficient 2." The correction unit described above may correct the drive amount using a predefined correction table based on the target position and the drive amount. The correction unit described above may be configured to allow switching between using either the detection position or the target position for correcting the drive amount. The correction unit described above may include a switching unit that switches between correction using either the detection position or the target position, and correction without using either the detection position or the target position, depending on the characteristics of the first and second drive sources. The correction unit may select which of the multiple drive sources to use as a reference for correcting the drive amount based on a parameter corresponding to the tilt of the optical element. The parameters corresponding to the above tilt may represent the tilt of the optical element detected when the maximum current is applied to each of the multiple drive sources. The above calculation unit may calculate the drive amount using feedback control based on the detected position and the target position. A second embodiment of the present invention provides a driving method. This driving method may involve driving a plurality of drive sources, including a first drive source and a second drive source. The driving method may include detecting the tilt of an optical element. The driving method may also include generating parameters corresponding to the tilt of the optical element. The driving method may also include detecting the position of the optical element and outputting the detected position. The driving method may also include calculating a drive amount for the optical element based on the detected position and the target position of the optical element. The driving method may also include generating a corrected drive amount by correcting the drive amount based on the drive amount, parameters corresponding to the tilt of the optical element, and either the detected position or the target position. The driving method may also include selecting which of the first drive source and the second drive source to drive with a drive force corresponding to the corrected drive amoun