Apparatus for and method of controlling output of a laser diode
AssigneeSamsung Electronics Co., Ltd.
InventorJin-Gyo Seo
Life of this patent
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Abstract
An apparatus for and a method of controlling an output of a laser diode in an optical recording/reproducing apparatus. The apparatus includes a sampling circuit sampling a present power value output from the laser diode with a predetermined frequency, an arithmetic unit connected to the sampling circuit, outputting a control power value applied to the laser diode in response to the present power value output from the sampling circuit and a reference power value, and a controller connected to the sampling circuit and the arithmetic unit, generating control signals, which control the operations of the sampling circuit and the arithmetic unit.
Claims47
An apparatus for controlling an output of a laser diode in an optical medium apparatus, comprising:
- a sampling circuit sampling said output of said laser diode at a predetermined frequency and generating a sampled signal;
- and
- an arithmetic unit receiving said sampled signal, generating a control power value applied to the laser diode in response to said sampled signal, and modifying said output of said laser diode in response to said control power value.
An apparatus for controlling an output of a laser diode, comprising:
- a sampling circuit receiving said output of said laser diode, sampling said output of said laser diode, and generating a sampled signal;
- and
- an arithmetic unit connected to said sampling circuit and said laser diode, generating a power value control signal to said laser diode in response to said sampled signal.
An apparatus for controlling an output of a laser diode, comprising:
- a sampling circuit sampling said output at a frequency to generate a sampled signal;
- and
- said laser diode modifying said output in response to said sampled signal.
An apparatus for controlling an output of a laser diode, comprising:
- a detecting unit receiving said output, and generating a first signal having a first frequency in response to said output of said laser diode;
- and
- a sampling circuit connected between said detecting unit and said laser diode, sampling said power level signal at a second frequency to generate a sampled signal, said laser diode modifying the output in response to said sampled signal.
A laser diode controlling apparatus, comprising:
- a laser diode generating an output;
- and
- a controller receiving and controlling said output, said controller and said laser diode being included in one integrated circuit.
A laser diode controlling apparatus, comprising:
- a laser diode mounted in a pickup device and generating an output:
- and
- a controller controlling said output and attached to said pickup device, both said controller and said laser diode being formed in a single body.
A method of controlling an optical output of a laser diode in an optical recording and reproducing apparatus, comprising:
- generating a power level signal in accordance with said optical output;
- sampling said power level signal with a sampling frequency to generate a sampled signal;
- and
- modifying said output in response to said sampled signal.
A method in a laser diode controller, comprising:
- generating an output from a laser diode;
- sampling and holding said output of said laser diode at a predetermined position for a period of time;
- comparing said sampled and held output with a reference poser value;
- and
- controlling said output in accordance with said sampled and held output.
Dependencies are inferred from the claim text.