A disc player circuit
A player and circuit technology, applied to instruments, optical recording/reproduction, data recording, etc., can solve the problems of laser damage and deterioration
Active Publication Date: 2015-08-19
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
When the CD player suddenly loses power, it often occurs that the laser is damaged or deteriorated
Method used
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Embodiment Construction
[0012] Specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0013] Such as figure 1 As shown, the optical disc player circuit of an embodiment includes a laser, a control chip and a laser drive unit, the laser drive unit is used to drive the laser, the control chip has a current control signal output terminal and a control port, and the laser The drive unit has a current control signal input terminal and a laser enable terminal, and the current control signal output terminal and control port of the control chip are respectively connected to the current control signal input terminal and the laser enable terminal of the laser drive unit.
[0014] When the control port outputs a high level, the laser drive unit starts to work after the laser enable terminal has a high level. After the control chip is decoded, it will output a corresponding current signal control value to the current level at the c...
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The invention discloses a compact disk player circuit which comprises a laser, a controlling chip, a laser driving unit, a first resistor, a third resistor, a fourth resistor, a sixth resistor, a first triode, a second triode, a diode and a capacitor. A current size controlling signal output end and a controlling port of the controlling chip are respectively connected with a current size controlling signal input end of the laser driving unit and an enable terminal of the laser, a base of the first triode is connected with a second power supply through the first resistor, a emitter of the first triode is connected with the ground, a collector of the first triode is connected with the ground through the fourth resistor, a positive pole of the diode is connected with a first power supply, a negative pole of the diode is connected with a collector of the first triode through the third resistor, a negative pole of the diode is connected with the ground through the capacitor, the collector of the first triode is connected with the base of the second triode through the sixth resistor, and the collector of the second triode and the emitter of the second triode are respectively connected with the enable terminal of the laser driving unit and the ground.
Description
technical field [0001] The invention relates to the field of optical disc players, in particular to a circuit of the optical disc player. Background technique [0002] In the servo system of the existing optical disc player, there is a laser driving unit on the optical head assembly of the movement. The laser driving unit is used to control and drive the laser to emit light. The laser driving unit has a laser enabling terminal. When the laser enable terminal is high level, the laser drive unit outputs current to the laser, and the laser emits light; when the laser enable terminal is low level, the laser drive unit does not output current to the laser, and the laser cannot emit light. When the CD player suddenly loses power, it is often the case that the laser is damaged or deteriorated. Contents of the invention [0003] After research, it is found that when the system is powered off, the control chip current control signal output terminal and the control port are not con...
Claims
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IPC IPC(8): G11B7/1263
Inventor 陈爱平
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD