Temperature compensating method of laser power in optical disk storage apparatus

Abstract

The invention discloses a temperature compensation method for laser power in an optical disk storage device, which is characterized in that no matter how the temperature changes, the temperature can be compensated so that the laser power output by the laser diode remains constant. According to the present invention, the current temperature when the laser diode is working is detected, and at the detected current temperature, the linear equation of the output laser power voltage of the laser diode in response to the input current is obtained. The input current corresponding to the required laser power voltage can be calculated by the obtained linear equation and supplied to the laser diode. Therefore, regardless of temperature changes, the laser power required by the laser diode can be output, so that the precise input current can be determined.

Description

technical field [0001] The invention relates to a method for temperature compensation of laser power in an optical disk storage device. In particular, the present invention relates to a method of temperature compensation of laser power in an optical disc storage device because an input current applied to a diode can be compensated corresponding to a temperature change, and thus can be used in an optical disc, such as for recording and reproducing by laser Compact disc (CD) or digital versatile disc (DVD) with predetermined information, output constant laser power,. Background technique [0002] The optical disc storage device equipped with a driving laser diode at the optical pickup outputs laser light. Laser light output from a laser diode is irradiated onto the surface of an optical disc, such as a CD or DVD servo, for recording or reproducing predetermined data. [0003] In the case where data is recorded on an optical disc through an optical disc storage device, a lase...

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Problems solved by technology

[0006] Another disadvantage is that if the laser power cannot be kept constant even during the reproduction of predetermined data stored in the optical disc, then the reproduction signal level of the data is changed, which cannot make the optical disc reproduce stable data.

However, there is a problem in that if the surrounding temperature of the laser diode changes, it cannot be processed, and as a result, the input capable of outputting the laser power required by the laser diode cannot be precisely set in response to the changed surrounding temperature. electric current

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