KR940009975A - Track Jumping Control Circuit and Method of Optical Pickup in Optical Disc Player - Google Patents

Abstract

In the optical disc reproducing apparatus, the track jump time increases as the moving speed is limited due to the missing track crossing signal when the optical pickup moves at a high speed.

To this end, in response to the setting of the jump mode, a moving target track from the track at the current position of the optical pickup to the target track is determined, and a high-speed moving range is set and then compared with the moving target track. When the moving target track is larger than the high speed moving range, the fraudulent optical pickup moves at high speed, and the track counting means counts the pseudo track crossing signal, and when the moving target track is within the high moving range, the optical pickup moves at low speed. And the track counting means counts the track crossing detection signal. Next, in response to the input of the track count signal from the track counting means, the moving target track is reduced, and the above steps are repeated until completion of the movement check.

Therefore, during the track jump, the optical pickup is accurately moved at the maximum movable speed.

Description

Track Jumping Control Circuit and Method of Optical Pickup in Optical Disc Player

Since this is an open matter, no full text was included.

2 is a block diagram of a track jump control circuit according to the present invention;

3 is a flowchart of a track jump control function according to the present invention.

Claims (3)

A track crossing detecting means for detecting a level change of a high frequency signal generated by pickup of an optical pickup and generating a track crossing signal in a binarized state; and an optical pickup driving motor for moving the optical pickup on an optical disc by predetermined control. An optical disc reproducing apparatus having a driving device for driving jump, comprising: pseudo track crossing signal generating means for generating a clock signal of a predetermined period corresponding to the maximum movable speed during track jump of the optical pickup and outputting the pseudo signal as a pseudo track crossing signal; An optical disc reproducing apparatus comprising jump driving means for driving an optical pickup drive motor for moving the optical pickup on an optical disc by a predetermined control, the optical disc reproducing apparatus having a predetermined period corresponding to the maximum movable speed at the time of track jump of the optical pickup. Pseudo track crossing signal generating means for generating a clock signal and outputting it as a pseudo track crossing signal; Selection means for selecting outputs of the track crossing detection means and the pseudo track crossing signal generating means by control, and a track counting means for counting a signal selected by the selection means and generating a track count signal upon completion of counting up to a preset value; And determine the moving speed by comparing the number of moving target tracks of the optical pickup with the predetermined high speed moving range while reducing the number of moving target tracks by the track count signal, and controlling the jump driving means to convert the optical pickup to the determined moving speed. A track jump control circuit for optical pickup, comprising: a control means for moving. 2. The apparatus according to claim 1, wherein the control means selects an output of the pseudo track traverse signal generating means while moving the optical pickup at high speed when the moving target track number is larger than the fast moving range. And the selection means controls the selection means to select the output of the track crossing detection means while continuously moving the optical pickup when a target track number is within the high-speed movement range. Generating an optical pickup, a track crossing detecting means for generating a track crossing signal, a jump driving means for driving an optical pickup driving motor, and a clock signal having a predetermined period corresponding to the maximum movable speed during track jumping of the optical pickup; A pseudo track crossing signal generating means for outputting as a pseudo track crossing signal, selection means for selecting outputs of said track crossing detection means and said pseudo track crossing signal generating means by predetermined control, and counting the signal selected by said selecting means A track jump control block for an optical pickup in an optical disc reproducing apparatus having a track count signal for generating a track count signal upon completion of counting up to a preset value, the current position of the optical pickup in response to a lyric of a jump mode. Determining a moving target track from the track to the target track and setting a high-speed moving range; Comparing the track with the high speed moving range, and moving the optical pickup at high speed when the moving target track is larger than the high speed moving range and selecting the track counting means to count the output of the pseudo track crossing signal generating means; And moving the optical pickup at a low speed when the moving target track is within the high-speed moving range and selecting the track counting means to count the output of the track crossing detecting means, from the track counting means. And a process of proceeding to the comparison process until the movement target track is completed by reducing the movement target track in response to the input of the track count signal, and checking the completion of movement to the movement target track. . ※ Note: The disclosure is based on the initial application.