Method for driving laser diode used for recording data on optical disk

Abstract

The invention provides a device and method for driving a laser diode to record data. According to this method, prestored variables corresponding to each manufacturer and each recording pit of the optical disc are checked. A primary pulse and a secondary pulse having a specified width are generated based on a variable tested. The sub pulse is generated a predetermined time before the main pulse is generated. Once the main pulse and the sub pulse are received, a driving signal for driving the LD to record data is generated. Therefore, the recording operation can be performed using a drive signal that does not have the overpower required by the conventional mode 1 (such as Orange 1), and can use less calculation in the same time as the recording cycle of the conventional mode 2 (such as Orange 2) and time to form recording pits of ideal time / size, thereby improving the recording quality.

Description

technical field [0001] The present invention relates to an optical recording device and method, and more particularly, to a device and method for driving a laser diode (LD) to record data on an optical disc. Background technique [0002] Orange Book, which describes various recording discs such as recordable CD (CD-R) discs, uses two recording methods to record arbitrary data on CD-R discs. These two methods are Mode 1 (also known as Orange 1) and Mode 2 (also known as Orange 2), which are described in detail below. Mode 1 (ie, Orange 1) is defined as a recording method in which recording is performed with overpower in consideration of the medium characteristics of the CD-R disc. When the LD of the optical pickup device is driven in a predetermined recording period, due to the characteristics of the LD, a predetermined delay time occurs at the rising edge of the signal, so a recording pit of an ideal size cannot be formed within an ideal time. Mode 1 applies overpower for ...

AI Technical Summary

Problems solved by technology

However, Mode 1 has the disadvantage that it must establish many variables to generate an LD drive signal with overpower

However, Mode 2 has the disadvantage that a predetermined delay time occurs in the rising time of the signal due to the LD characteristic, and therefore, the method cannot correctly form the initial recording pit, which leads to a decrease in the recording mark quality.

This degradation in recording mark quality is more severe at high-speed recording

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