Apparatus and method for controlling camera module
AssigneeLx Semicon Co., Ltd.
InventorsSeung Jun Choi, Kyu Ho Kim, Tae Gwan Kim, Su Gyeong Park
Life of this patent
Estimating the term…
Abstract
An embodiment discloses an apparatus for controlling a camera module, including a parameter generation unit configured to generate a parameter entity group, calculate a fitness value of the parameter entity group based on a step response characteristic of an output signal, and generate an offspring entity by applying weight-gain elitism to a parameter entity having the smallest fitness value among parameter entities included in the parameter entity group, and a controller configured to generate a control signal by multiplying an error signal by a parameter.
Claims16
An apparatus for controlling a camera module, comprising:
- a parameter generation unit configured to generate a parameter entity group, calculate a fitness value of the parameter entity group based on a step response characteristic of an output signal, and generate an offspring entity by applying weight-gain elitism to a parameter entity having a smallest fitness value among parameter entities included in the parameter entity group;
- and
- a controller configured to generate a control signal by multiplying an error signal by a parameter,
- wherein the error signal is a difference between the output signal and a reference signal, and
- the weight-gain elitism is a genetic algorithm operation of adding a weight according to the step response characteristic to a parameter having the smallest fitness value,
- wherein the parameter entity group is generated to include the parameter corresponding to the generated offspring entity,
- the step response characteristic comprises a rising time,
- the parameter comprises a proportional parameter, and
- the parameter generation unit additionally calculates a proportional weight based on a difference between the rising time and a target rising time and generates the proportional parameter of the offspring entity by adding the proportional weight to the proportional parameter.
A method of controlling a camera module, comprising:
- generating an output signal in response to a control signal;
- generating an error signal corresponding to a difference between the output signal and a reference signal;
- generating a parameter entity group;
- calculating a fitness value of the parameter entity group based on a step response characteristic of the output signal;
- generating an offspring entity by applying weight-gain elitism to a parameter entity having a smallest fitness value among parameter entities included in the parameter entity group;
- and
- generating the control signal by multiplying the error signal by a parameter,
- wherein the weight-gain elitism is a genetic algorithm operation of adding a weight according to the step response characteristic to a parameter having the smallest fitness value,
- wherein the generating of the parameter entity group comprises:
- generating the parameter corresponding to the generated offspring entity;
- and
- generating the parameter entity group comprising the parameter,
- the step response characteristic comprises a rising time,
- the parameter comprises a proportional parameter, and
- the generating of the offspring entity comprises:
- measuring the rising time of the output signal;
- calculating a proportional weight based on a difference between the measured rising time and a target rising time;
- and
- generating the proportional parameter of the offspring entity by adding the proportional weight to the proportional parameter.
Dependencies are inferred from the claim text.