Laser power control circuit and its method

A technology of laser power and control circuit, which is applied in the direction of recording/reproducing and controlling laser output parameters by optical methods, beam source, etc., which can solve the problem of limited control ability of laser power size and low attention to laser power accuracy, etc. problem, to achieve the effect of improving accuracy

Inactive Publication Date: 2006-03-29
MEDIATEK INC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the known technology does not pay much attention to the control of the accuracy of the laser power
In the manufacturing process of the known optical storage device, only a single laser power value corresponding to the continuous laser output is often corrected, so the optical storage device has a very limited ability to control the laser power generated by the laser diode

Method used

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  • Laser power control circuit and its method
  • Laser power control circuit and its method
  • Laser power control circuit and its method

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Embodiment Construction

[0043] Such as figure 1 as shown, figure 1 It is a schematic diagram of the laser power control circuit 100 according to the first embodiment of the present invention. The laser power control circuit 100 is used to control the laser power generated by the laser generator 2 of an optical storage device. The optical storage device utilizes a laser generator 2 to generate laser light. Through the optical components 4, 6, and 8, the laser light generated by the laser generator 2 will be focused on the optical disk 10, and the optical storage device can be accessed. ) or burn CD 10. Such as figure 1 As shown, the laser power control circuit 100 has a system control module 110 , a driving module 120 , a detection module 130 , and a feedback module 140 . The system control module 110 has a microprocessor 112 , a logic control unit 114 , and a memory 116 . The driving module 120 has a write channel control module 122 , an overdrive channel (OD channel) control module 126 , and a ...

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Abstract

The invention is a laser power control circuit, having a system control module, a driving module, and a detecting module, where the system control module determines a first mapping relation between a write channel target value and a laser power value and a second mapping relation between an overdrive channel target value and a laser power value, and stores plural control parameters corresponding to the first and second mapping relations, so as to control the laser power of a laser generator according to these control parameters.

Description

technical field [0001] The invention relates to a laser power control circuit and a method thereof, in particular to a laser power control circuit of an optical drive and a method thereof. Background technique [0002] With the improvement of computing speed of computers and the rise of the Internet, users in various fields have an increasing demand for data storage. Various optical discs, such as digital versatile discs (Digital Versatile Disc, DVD) . Therefore, the optical storage device (optical storage device) corresponding to these discs, such as: digital versatile disc drive (DVD drive), digital versatile disc burner (DVD burner) ... etc., then become one of the standard equipment of calculators. one. [0003] When an optical storage device burns an optical disc, the laser power generated by a laser diode (LD) of the optical storage device will directly affect the recording quality of the optical disc. Among them, the control items of laser power include the stabili...

Claims

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Application Information

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IPC IPC(8): G11B7/00G11B7/125H01S5/06G11B7/1263
Inventor 郭中仁蔡明宪
Owner MEDIATEK INC
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