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US 8,509,611 B2Granted
Lens controlling device and imaging apparatus using the same
AssigneeRohm Co., Ltd.
InventorsKoji Saito, Akihito Saito
Life of this patent
Estimating the term…
Abstract
A lens controlling device disclosed herein includes: a servo calculation section which calculates a motor current setting value such that a lens position detection signal which is inputted from a photo reflector agrees with a predetermined target lens position setting signal; a motor driver which generates a motor current in accordance with the motor current setting value, and supplies the motor current to a lens drive motor; and a temperature correction calculation section which monitors the motor current setting value to generate the temperature correction signal, and corrects either one of the target lens position setting signal and the lens position detection signal.
Claims15
A lens controlling device, comprising:
- a servo calculation section which calculates a motor current setting value such that a lens position detection signal which is inputted from a photo reflector agrees with a predetermined target lens position setting signal;
- a motor driver which generates a motor current in accordance with the motor current setting value and supplies the motor current to a lens drive motor;
- and
- a temperature correction calculation section which monitors the motor current setting value to generate a temperature correction signal, and corrects either one of the target lens position setting signal and the lens position detection signal.
1 more element
A lens controlling device, comprising:
- a servo calculation section which calculates a motor current setting value such that a lens position detection signal which is inputted from a photo reflector agrees with a predetermined target lens position setting signal;
- a motor driver which generates a motor current in accordance with the motor current setting value and supplies the motor current to a lens drive motor;
- and
- a temperature correction calculation section which monitors the motor current setting value to generate a temperature correction signal, and corrects a drive current of the photo reflector,
- wherein
- the temperature correction calculation section includes an integrator which integrates the motor current setting value, and the temperature correction calculation section generates the temperature correction signal based on an output signal of the integrator.
3 more elements
An imaging apparatus comprising:
- a lens unit;
- a photo reflector which irradiates the lens unit with light, and generates a lens position detection signal in accordance with intensity of reflected light;
- a lens drive motor which drives the lens unit according to a motor current;
- and
- a lens controlling device which generates the motor current and supplies the motor current to the lens drive motor,
- wherein
- the lens controlling device includes:
- a servo calculation section which calculates a motor current setting value such that a lens position detection signal which is inputted from the photo reflector agrees with a predetermined target lens position setting signal;
- a motor driver which generates the motor current in accordance with the motor current setting value and supplies the motor current to the lens drive motor;
- and
- a temperature correction calculation section which monitors the motor current setting value to generate a temperature correction signal, and corrects either one of the target lens position setting signal and the lens position detection signal.
8 more elements
An imaging apparatus, comprising:
- a lens unit;
- a photo reflector which irradiates the lens unit with light and generates a lens position detection signal in accordance with intensity of reflected light;
- a lens drive motor which drives the lens unit according to a motor current;
- and
- a lens controlling device which generates the motor current and supplies the motor current to the lens drive motor,
- wherein
- the lens controlling device includes:
- a servo calculation section which calculates a motor current setting value such that the lens position detection signal which is inputted from the photo reflector agrees with a predetermined target lens position setting signal;
- a motor driver which generates the motor current in accordance with the motor current setting value and supplies the motor current to the lens drive motor;
- and
- a temperature correction calculation section which monitors the motor current setting value to generate a temperature correction signal, and corrects a drive current of the photo reflector;
- and
- wherein
- the temperature correction calculation section includes an integrator which integrates the motor current setting value, and the temperature correction calculation section generates the temperature correction signal based on an output signal of the integrator.
11 more elements
Dependencies are inferred from the claim text.