KR930001361B1 - Optical express search method and apparatus of laser disc - Google Patents

Abstract

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Description

Optical high speed search method and apparatus for laser disk

1 is a block diagram according to the present invention.

2 is a flow chart in accordance with the present invention.

3 is an operation timing diagram of FIG.

* Explanation of symbols for main parts of the drawings

101: keyboard 102: main controller

103: servo motor control unit 104: servo motor driver

105: servo motor 106: encoder

107: Opic 108: Pickup

109: sled error signal generator 110: preamplifier

111: DSP 201: monostable MV (Multy Vibrator)

202 and 211: falling edge detecting means 203: latching means

204: acceleration signal generating means 205: third mux

206: the first mux 207: the second mux

208: signal shaping means 209: inverter means

210: counter 212: brake signal generating means

213: fourth mux 214: comparison means

215: rising edge detecting means 301: first signal generating means

302: second signal generating means 303: amplifying means

The present invention relates to a high-speed search method and apparatus in an audio / video system using a laser disk as a medium, and more particularly, to a high-speed search method and apparatus using an optical encoder and an OPIC (Optical Integrated Circuit).

In general, when performing a high-speed search on a compact disc (hereinafter referred to as "CD"), the pickup is transferred in the radial direction from the CD. Track zero cross (TRACK ZERO CROSS) is a method for accurately reaching the target point. (Hereinafter referred to as "TZC").

This counts the number of tracks transferred by counting the envelope of the low frequency component of the RF (Radio Frequency) that appears when the pickup is transported. However, since the TZC is transported at a higher speed than when the pickup is playing, the track may be missed in a situation where the rotational speed of the CD is hard to change rapidly during the transfer time. That is, the pits formed on the surface of the CD each have a constant length and discretely constitute a spiral track. If the laser beam outputted from the pickup is scanned between the pits on the tracks, the tracks exist. The RF cannot be detected even at the position of

As a result, the TZC may be missed and a large number of tracks may cause significant errors in reaching the target point. This has the disadvantage that the song or video may fail to start at the correct position when searching for the song or video recorded on the CD and playing there.

Therefore, an object of the present invention is to attach an encoder having a linear slit of a certain interval to the pickup, and the optical detection function is attached to the driving peripheral portion of the encoder to optically detect the number of slits of the encoder when the pickup is moved. The present invention provides a device capable of finding an accurate position when searching for a predetermined position of the CD by the pickup by counting the value after detection.

Still another object of the present invention is to move the pickup by moving a slit encoder attached to a pickup and a fixed optical detection opi or an optical detection opi attached to the pickup and a fixed slit encoder and a servo motor to move the pickup. It is to provide a method for accurately controlling the movement of the high speed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram according to the present invention, wherein the pickup 108 reads a signal recorded on the disk by emitting a laser beam to the surface of the disk and then detecting a state of light reflected from the fit of the disk; A preamplifier 110 and a DSP (Digital Signal Processing) 111 for correcting an error detected by the pickup 108 and outputting a tracking position signal TR which is data on a tracking position at that time; Receives a sled error signal generator 109 which detects a tracking error signal from the read signal of the pickup 108 and generates and outputs a sled error signal SE, and receives predetermined motor driving signals MM1 and MM2. A servo motor 105 for moving the pickup 108, an encoder 106 attached to the pickup 108 and having a straight slit, and fixed to a driving periphery of the encoder 106 to the encoder 106. After transmitting the light and receiving the reflected light to the encoder ( The ohmic 107 which generates and outputs first and second ohmic signals Q1 and Q2 which are proportional to the number of slits detected by the reflected light and have a predetermined phase difference (90 °) when the vehicle 106 is traveling; A keyboard 101 having various function keys for driving the pickup 108 and a search key for realizing a function of searching for a predetermined position on the CD, and outputting the corresponding machine language data when the keys are selected; Receives a tracking position signal TR from 111 and detects the position of the pickup 108 and the position of the fitting train tracked by the pickup 108 to search for data when the search key data is input from the keyboard 101. Outputs search signal SH for starting, calculates the position of the fit row at that time, calculates the position of the destination to be searched from there, determines the search direction, and reverses the signal for controlling the pickup 108 in that direction. EXIT (REV) At the same time, after outputting the search ON signal SHIN indicating the start of the search, the break point data RFDT for controlling the speed of the search motor 105 is calculated and output from the search target data, and the predetermined search OFF signal is output. When (SHOF) is input, the main controller 102 resets each control for performing the search to an initial value, and amplifies a sled error signal SE from the sled error signal generator 109 to drive the motor. The signals MM1 and MM2 are supplied to the servomotor 105 and when the search signal SH is input from the main controller 102, the sled error signal SE is grounded and bypassed, thereby providing a first current source. The servo motor is supplied at high speed by selecting IS1 and the second current source IS2 according to the predetermined current source control signals TC1 and TC2 and inverting and amplifying them to supply the motor driving signals MM1 and MM2 to the servo motor 105. Reverse or forward The servo motor driver 104 receives the first and second ohmic signals Q1 and Q2 from the ohmic 107, detects the movement state of the pickup 108, and provides a search-on signal from the main controller 102. The servo motor 105 is controlled so that the pickup 104 travels at high speed by generating and outputting current source control signals TC1 and TC2 to the servo motor driver 104 by receiving the SHON and the break point data RFDT. The servo motor controller 103 which receives the reverse signal REV from the main controller 102 and controls the rotational direction of the servo motor 105 by changing the states of the first and second current source control signals TC1 and TC2. It consists of.

In addition, the servo motor control unit 103 receives the search-on signal (SHON) from the main control unit 102 and outputs a pulse W1 of which the active state width of the pulse is widened, and a monostable MV (Multy Vibrator) 201. And a falling edge detecting means 202 for detecting a falling edge of the pulse W1 widened by the monostable MV 201 and outputting a predetermined pulse W2, and receiving the break point data RFDT. In response to the pulse W2 of the detection means 202, the latch outputs the latch 203 and the first ohmic signal Q1 to the input terminal X0 and the second ohmic signal Q2 to the input terminal X1. Receiving the signal REV and selecting an input signal of the input terminal X1 when the reverse signal REV is active; and selectively outputting an input signal of the input terminal X0 when the reverse signal REV is passive. The first mux 206 and the first ohmic signal Q1 are received at the input terminal Y1 and the second ohmic signal Q2 is received. Receives the reverse signal REV and receives the reverse signal REV and selectively outputs the reverse signal REV by selecting the input signal of the input terminal Y1 when the reverse signal REV is in an active state. When the REV is passive, the second mux 207 selecting the input signal of the input terminal Y0 and the output of the first mux 206 are received as clocks. Signal conversion means 208 for latching and outputting only the rising edge of the second mux 207, inverter means 209 for inverting and outputting the output of the first mux 206, and the signal conversion means 208 Polling edge detection means 211 that detects the falling edge at the output of the output signal and generates a pulse according to the output signal, and receives the output of the signal conversion means 208 as an enable signal. Is active when the output of the inverter means 209 is clocked A counter 210 for counting and outputting the reset edge by receiving the search-off signal SHOP of the falling edge detecting means 211 and comparing the output value of the counter 210 with the output value of the latching means 203. Comparing means 214 for outputting a predetermined pulse (W3) when the same as each other, and rising edge detection means for receiving the output pulse of the comparison means 214 to detect the rising edge and output the detection pulse (W4) at that time ( 215, acceleration signal generating means 204 for generating an acceleration signal by receiving the detection pulse W4 which is the output of the rising edge detection means 215 and the output pulse W2 of the falling edge detection means 202, and outputting it. And a brake signal generating means 212 for generating a brake signal by receiving a search-off signal SHOP output of the falling edge detecting means 211 and a detection pulse W4 of the rising edge detecting means 215; , Brake signal output of the brake signal generating means 212 To the input terminal (W0) receives the acceleration signal output of the acceleration signal generating means 204 to the input terminal (W1) and receives the reverse signal (REV) to the selection signal input terminal (S), the signal of the input terminals (W0, W1) Selects and outputs the signal as the first current source control signal TC1, but selects a signal of the input terminal W1 when the reverse signal REV is in an active state, and selects a signal of the input terminal W0 when the reverse signal is in a passive state. And a third mux 205 for selecting and an acceleration signal output of the acceleration signal generator 204 to the input terminal Z0 and a brake signal output of the brake signal generator 212 to the input terminal Z1. Selected by the reverse signal REV and output as the second current source control signal TC2, when the reverse signal REV is active, the signal of the input terminal Z1 is selected, and when the reverse signal is passive, the input terminal Z0. To choose the signal of It is composed of four mux 213.

In addition, the servo motor driver 104 receives the search signal SH, and the third switching means SW3 for grounding the sled error signal SE, the node n, the first current source IS1, And a first switch means SW1 for receiving the second current source IS2 and the first current source control signal TC1 and transferring the first current source IS1 to the node n, and controlling the second current source. Second switching means SW2 for receiving the signal TC2 and transferring the second current source IS2 to the node n, and receiving the sled error signal SE, non-inverting and amplifying the node n. And amplifying means 303 for inverting and amplifying the signal to generate and output the motor driving signals MM1 and MM2.

The first mux 206, the second mux 207, the signal converting means 208, and the inverter means 209 are combined with each other to receive and output an enable signal and a clock signal. The first signal generating means 301 is defined as a means, and the third mux 205 and the fourth mux 213 are combined to receive a brake signal and an acceleration signal and generate a current source control signal TC1NTC2. It is defined as two signal generation means 302.

FIG. 2 is a flowchart illustrating the operation of the main control unit 102 in the configuration of FIG. 1 according to the present invention, in which the search signal SH is set to be active when the search key data is input, and after calculating a destination, the position there is at the current position. A first step of checking whether the moving direction is in the reverse (outer) direction or the forward (inner) direction when moving, and if the position to be moved in the first process is reversed, a reverse signal REV is set passively, and if the moving position is not reverse, The second process of actively setting the reverse signal REV and the breakpoint, which is a time point for decelerating the search speed after performing the second process, are calculated based on the destination position calculated in the first process, and then the calculated value. The third step of outputting the data as a breakpoint data (RFDT) and the search off signal SHOP is input after the third step is performed. When the value is input, the search set in the first step is performed. A fourth step of terminating and resetting the signal SH is configured.

3 is a timing diagram for the main part of FIG. 1, where REV is a signal for determining the rotational direction of the servo motor, and Q1 and Q2 are used for the slit movement of the encoder 106 output from the ohmic 107. Is a pulse, and (SHON) is a search on signal, and (SHOF) is a search off signal. W1 is an output pulse waveform of the monostable MV 201, W2 is an output pulse waveform of the falling edge detecting means 202, and W3 is a pulse outputted when the comparison means 214 match each other. , W4 is a detection pulse W4 waveform output from the rising edge detection means 215 when a rising edge occurs in the pulse of W3. TC1 and TC2 are waveforms of the first and second current source control signals for controlling the output current of the servo motor controller 103. In addition, I1 and I2 are waveforms of current flowing when the servomotor 105 rotates.

3a and 3b are formed of the waveforms described above, and FIG. 3a is a timing diagram when the reverse signal REV is at the passive level L, and FIG. 3b is an active level at which the reverse signal REV is active. The timing diagram at (H).

Therefore, an embodiment of the present invention based on the above configuration will be described in detail.

First, the principle of the present invention is briefly described.

According to the present invention, when the laser beam is transmitted between the fittings of the tracks when searching the tracks of the disc by using the TZC method, the search of the tracks is impossible and the error occurs during the search. Do not use the method. As described in the configuration of FIG. 1, the encoder 106 and the ohmic 107 are configured together with the pickup 108 so that the opic 107 is fixed and the encoder 107 is fixed when the pickup 108 is transported. The slit of the encoder 106 passes through the light emitting portion of the opic 108 which is fixed accordingly and transferred accordingly. Then, the ohpik 108 detects the number of the slit passing through the light, generates and outputs the pulses Q1 and Q2 accordingly, and then, using the pulses A1 and Q2, the main control unit 102 and the servomotor which are microcomputers. By operating the control unit 103 and the servo motor 105, the servo motor 105 is controlled to control the pickup 108 accurately and at high speed.

The following is a detailed example of realizing the above principle with reference to FIGS. 1 to 3.

In FIG. 1, when the CD starts to be driven, the main control unit 102 performs each block in the table of contents (TOC) area on the CD through the pickup 108, the preamplifier 110, and the digital signal processor (DSP) 111. Read and load information about. When the CD starts to drive in the normal state, the sled error signal generator 109 receives the signal from the pickup 108 and generates and outputs a sled error signal SE. At this time, the servo motor driver 104 has the first current control signal TC1, the second current source control signal TC2, and the search signal SH all low because the CD is normally playing, and thus the sled error signal SH is generated. Only after receiving and amplifying it, the servomotor 105 is driven by the current.

In this state, when search key data for searching for a predetermined position on the CD is input to the main control unit 102 through the keyboard 101, the main control unit 102 receives the TOC area of the CD received from the DSP 111. After calculating the absolute time of the moment when the search is started, the absolute time of the target point, and the search direction, the number of tracks to be jumped is calculated. The signal SHON, the breakpoint data RFDT which is the deceleration point data, and the reverse signal REV which is the search direction data are output.

At this time, since the detection of the conveyance distance in accordance with the optical encoder 106 in the present invention, the main control unit 102 determines the breakpoint data RFDT from the slit interval of the encoder and the number of tracks to be jumped. In addition, the main controller 102 supplies the search signal SH to the servo motor driver 104 to turn on the third switch SW3 in the servo motor driver 104 to thereby turn on the sled error signal SE. By grounding, the sled error signal SE is blocked from flowing into the servo motor driver 104.

At this time, the servo motor controller 103 receives the search-on signal SHON to widen the pulse width in the monostable MV 201 and the pulse W1 widened in the monostable MV 201 by the falling edge detecting means 202. Outputs a single pulse (W2) according to the falling edge of. At this time, the latch means 203 of the servo motor controller 103 receives the pulse W2 of the falling edge detecting means 202 and latches the break point data RFDT output from the main controller 102 to compare the result. Output to (214). The acceleration signal generating means 204 of the servo motor controller 103 receives the output pulse W2 of the falling edge detecting means 202 and the third mux 205 and the third mux in the second signal generating means 302. The acceleration signal is supplied to the W0 and Z0 input terminals of the four mux 213.

In this case, the third and fourth mux 205 and 213 determine a selection state according to the reverse signal REV. When the reverse signal REV is a passive state, the third mux 205 is connected to the W0 input terminal. When the signal is selected, the fourth mux 213 selects a signal of the Z0 input terminal, and when the reverse signal REV is in an active state, the fourth mux 213 is reversed.

Accordingly, if the destination to be searched by the main controller 102 is the inner circumferential side of the CD, the reverse signal REV becomes a low state, so that the third mux 205 and the fourth mux 213 Select and output the signal of W0 input terminal and Z0 input terminal, respectively.

The second current source control signal TC2 that is the output of the third mux 205 and the second current control signal TC2 that is the output of the fourth mux 213 are switches SW1-1 of the servo motor driver 104. Each of the first current source control signal TC1 is in an active state, so that only the switch SW1 is turned on and the first current source IS1 is inverted and amplified by the amplifier AMP of the amplifying means 303. Therefore, the servo motor 105 rotates in reverse at high speed. And accordingly, the pickup 108 proceeds at high speed in the inner circumferential direction of the CD.

In this case, since the encoder 105 is also interlocked with the pickup 108, in the opic 107, the first and second ohmic signals Q1 and Q2 in which the slits of the encoder 105 are proportional to the same number are shown in FIG. 3a. Outputs with a phase difference of 90 °. The phase of the first and second ohmic signals Q1 and Q2 is the phase of the first ohmic signal Q1 since the traveling direction of the encoder 106 is the inner circumferential direction of the CD. Ahead of phase.

The first and second ohmic signals Q1 and Q2 are input terminals X0 and X1 of the first mux 206 and the second mux 207 of the first signal generating means 301 of the servo motor controller 103. Are supplied to the input terminals X0 and Y1, respectively. In this case, since the reverse signal REV is in the low state, the first and second muxes 206 and 207 select and output the signals of the X0 input terminal and the Y1 input terminal, respectively, and the output of the first mux 206 is a signal again. The input terminal D of the shaping unit 208 is input, and the output of the second mux 206 is input to the clock input terminal of the signal shaping unit 208. At this time, the signal shaping means 208 is the second oak signal (Q2) as shown in the 3a as the rising point of the high section of the first opic signal (90 ° point), so that the signal shaping means (208) Since the first ohmic signal Q1 is latched and output only in the high section, the output signal Q outputs a signal shaped like the EN signal of FIG. 3a.

The falling point of the EN signal is a time point at which phases of the first and second ohmic signals Q1 and Q2 are reversed from the initial stages. At this time, the output of the signal shaping means 208 is input to the falling edge detection means 211 and acts as an enable signal of the counter 210. Accordingly, the counter 210 counts up from the moment when the first and second ohmic signals Q1 and Q2 occur, and the count output of the counter 210 is input to the comparison means 214 by the latch means. The comparator 214 is supplied to an input terminal other than the input terminal inputted by 203 so that the comparison means 214 is compared with the break point data inputted by the latch means 203.

At this time, the comparing means 214 compares the break point data RFDT received from the latching means 203 with the count value of the counter 210, and if the value is the same, the pulse W3 for displaying the value is Outputs as shown in W3 of FIG. At this time, the rising edge detecting means 215 receives the output pulse W3 of the comparing means 214 and outputs a pulse, such as W4 of FIG. 3a, at the rising point thereof, thereby outputting the acceleration signal generating means 204. The first current source control signal TC1 is shifted to the passive state as shown by TC1 of FIG. 3A by stopping the signal. At the same time, the output pulse W4 of the rising edge detecting means 215 is supplied to the brake signal generating means 212 so that the brake signal generating means 212 brakes to decelerate the acceleration state of the servomotor 105. When the first current source control signal TC1 becomes passive, the second power source control signal TC2 transitions to the active state as shown by TC2 of FIG. 3a.

In addition, since the first current source control signal TC1 becomes passive, the first switching means SW1 of the servo motor driver 104 is turned off, so that the first current source IS1 is cut off and the second current source control signal is instead. Since the second TC2 is turned on, the second switching means SW2 is turned on to supply the second current source IS2 to the amplifier 303. Therefore, the servo motor 105 stops the acceleration state and starts to decelerate. Accordingly, the widths of the pulses of the first and second ohmic signals Q1 and Q2 of the ohmic 107 also change as Q1 and Q2 of FIG. 3a and after a while, when the servo motor 105 passes the stop point. The two phases of the first and second ohmic signals Q1 and Q2 are shifted together with the last falling point of FIG. 3A. At this point, the output of the signal shaping means 108 transitions to the end of EN of FIG. 3a.

In addition, the falling edge detection means 211 generates a search off signal (SHOF) at the moment when the output of the signal shaping means 208 transitions, and outputs as shown in the SHOF of FIG. 3a, the search off signal (SHOF) ) Is input to the counter 210 as a reset signal to clear the counter 210. In addition, the search-off signal SHOP is supplied to the brake signal generating means 212 to stop the brake signal being output so as to transition the second current source control signal TC2 to the passive state. In addition, when the search off signal SHOP is supplied to the main control unit 102 so that the main control unit 102 transitions the search signal SH to a passive state, the servo motor driver 104 is normally playing. As described above, the servo motor 105 is driven by the sled error signal SE.

The above description is an operation when the reverse signal REV is low, that is, when the destination to be searched by the main control unit is the inner circumferential side on the CD at the search start position. The reverse signal REV will be high, and the operation thereof will be performed according to the timing of FIG. 3b and will be omitted since it can be understood by anyone having ordinary knowledge since the same principle as described above.

Therefore, the flow of FIG. 2 which is the operation flow of FIG. 2 which is the operation flow of the main control part 102 when it operates as mentioned above is demonstrated.

First, when search key data is output from the keyboard 101, the main controller 102 recognizes it in step 201, and activates the search signal SH in step 202 and simultaneously the search on signal. (SHON) Outputs the pulse. In step 203, the DSP 111 loads the value of the TOC area on the CD and calculates a destination to which the pickup 108 will visit based on the value. After calculating the destination in the step (203), the main control unit 102 checks whether the destination is in the outer circumferential direction or the inner circumferential direction from the CD in step (204), and if in the inner circumferential direction (step 205) The reverse signal REV is passively output, and if the outer signal is circumferential, the reverse signal REV is actively output in step 206. After performing steps 205 and 206, the main control unit 102 calculates a break point and outputs the break point data RFDT in step 207, and then the search off signal SHOP. When the search off signal (SHOF) is inputted, the signal set in the active state in step (202) is reset to the passive state to terminate the search.

When operating as described above, the present invention is an advantage that can be accurately searched without error even if the predetermined position on the CD to search at high speed.

Claims (8)

The pickup 108 reads out the signal recorded on the disk by emitting a laser beam onto the surface of the disk and then detects the state of light reflected from the disk's fit, and the signal detected by the pickup 108 is in error. The tracking error signal is detected from the preamplifier 110 and the DSP 111 and the signal read out from the pickup 108 and then used to output the tracking position signal TR, which is data on the tracking position at that time. A laser including a sled error signal generator 109 for generating and outputting a sled error signal SE, and a servo motor 105 for receiving the predetermined motor driving signals MM1 and MM2 to move the pickup 108. In the high-speed search apparatus of a disc, an encoder 106 attached to the pickup 108 and having a straight slit, and fixed to a driving periphery of the encoder 106, transmits light to the encoder 106, and then reflects reflected light. The encoder 106 receives the light. The pick-up 107 which generates and outputs the first and second ohmic signals Q1 and Q2 which are proportional to the number of slits of the encoder 106 detected when driving and have a predetermined phase difference (90 °) from each other, and the pickup A keyboard 101 having various function keys for driving 108 and a search key for realizing a function of searching for a predetermined position on a CD, and outputting corresponding machine language data when the keys are selected; Receives a tracking position signal TR from 111 and detects the position of the pickup 108 and the position of the fit row tracked by the pickup 108 to search for the search key data from the keyboard 101. Outputs a search signal (SH) for starting and calculates the position of the fit column at that time and calculates the position of the destination to be searched from there to determine the search direction and then controls the pickup 108 in that direction. Output reverse signal (REV) At the same time, after outputting a search ON signal SHIN indicating a search start, the breakpoint data RFDT for controlling the speed of the servomotor 105 is calculated and output from the searched destination data. When the SHOF is input, the main controller 102 resets each control for performing the search to an initial value, and amplifies the sled error signal SE from the sled error signal generator 109 to drive the motor. The signal is supplied to the servo motor 105 as the signals MM1 and MM2. When the search signal SH is input from the main controller 102, the sled error signal SE is grounded and bypassed. The servo motor is supplied by selecting the current source IS1 and the second current source IS2 according to the predetermined current source control signals TC1 and TC2 and inverting and amplifying them to supply the motor driving signals MM1 and MM2 to the servo motor 105. When rotating in reverse or forward direction at high speed Receives first and second error signals Q1 and Q2 from the servo motor driver 104 and the ohmic 107, detects the movement state of the pickup 108, and searches for the search from the main controller 102. The servo motor 105 is driven to generate the current source control signals TC1 and TC2 to the servo motor driver 104 by receiving the signal SHON and the break point data RFDT. A servo motor control unit for controlling the rotation direction of the servo motor 105 by controlling and changing a state of the first and second current source control signals TC1 and TC2 by receiving a reverse signal REV from the main controller 102. An optical high-speed search device for a laser disk, characterized by comprising (103). The monostable MV 201 according to claim 1, wherein the servo motor control unit 103 receives the search-on signal SHON and outputs a pulse W1 in which the active state width of the pulse is widened. Polling edge detection means 202 for detecting the falling edge of the pulse (W1) widened in 201 and outputs a predetermined pulse (W2) and receiving the break point data (REDF) of the falling edge detection means (202) The first ohmic signal when the reverse signal REV is in a passive state by receiving the latch 203 and the reverse signal REV, the first ohmic signal Q1, and the second ohmic signal Q2 that are output in response to a pulse. First signal generating means 301 for outputting an enable signal in an active state and generating and outputting the same count clock as that of the first ohmic signal Q1 in a period where Q1 is earlier than the second ohmic signal Q2. And, receiving the enable signal of the first signal generating means 301 by generating a predetermined pulse of the falling edge of the Polling edge detection means 211 for outputting the off signal (SHOF), the enable signal receiving and enabling the count up according to the count clock and outputs the counter 210 is cleared by receiving the search off signal (SHOF) ), A comparison means 214 for outputting a predetermined pulse W3 when the output value of the counter 210 is compared with the output value of the latching means 203, and an output pulse of the comparison means 214. The rising edge detecting means 215 for receiving the rising edge and outputting the detection pulse W4 at that time, and the output detecting pulse W4 and the falling edge detecting means 202 of the rising edge detecting means 215. Acceleration signal generating means 204 for generating an acceleration signal by receiving an output pulse W2 of the output signal, and outputting a search-off signal SHOP of the falling edge detecting means 211 and the rising edge detecting means 215. Generates brake signal by receiving detection pulse (W4) The brake signal generating means 212 and the acceleration signal, the brake signal, and the reverse signal REV, and receive the acceleration signal when the reverse signal REV is in a passive state. When the brake signal is a first current source control signal TC1 and the reverse signal REV is in an active state, the acceleration signal is a first current source control signal TC1 and the brake signal is a second current source control signal ( And a second signal generating means (302) for outputting as TC2). 2. The servo motor driver (104) according to claim 1, wherein the servo motor (104) receives the search signal (SH) and grounds the sled error signal (SE), the third switching means (SW3), the node (n), and the first current source ( A first switch means SW1 for receiving IS1, a second current source IS2, a first current source control signal TC2, and transferring the first current source IS1 to the node n, and the second Second switching means SW2 for receiving the current source control signal TC2 and delivering the second current source TS2 to the node n, and receiving the sled error signal SE, non-inverting and amplifying as necessary. And an amplifying means (303) for receiving the signal of the node (n) and inverting and amplifying the motor driving signals (MM1, MM2) as necessary to generate and output the motor driving signals (MM1, MM2). 3. The reverse signal REV of claim 2, wherein the first signal generation means 301 receives the first ohmic signal Q1 as the input terminal X0 and the second ohmic signal Q2 as the input terminal X1. A first mux 206 for selecting an input signal of the input terminal X1 when the active state is selected, and selecting an input signal of the input terminal X0 when the reverse signal REV is a passive state; Q1) is received at the input terminal Y1 and the second ohmic signal Q2 is received at the input terminal Y0 and selectively outputted by the reverse signal REV, when the reverse signal REV is in the active state. A second mux 207 for selecting an input signal and selecting an input signal of the input terminal Y0 when the reverse signal REV is in a passive state, and outputting the output of the first mux 206. A signal converting means 208 that receives the output of the 2 mux 207 as a clock and latches only the rising edge of the second mux 207 and outputs it; An optical high-speed search device for a laser disk, comprising: an inverter means (209) for inverting and outputting the output of the first mux (206). The method of claim 2, wherein the second signal generating means 302 receives the brake signal output of the brake signal generating means 212 to the input terminal W0 and receives the acceleration signal output of the acceleration signal generating means 204 to the input terminal W1. Receives the reverse signal REV to the selection signal input terminal S, selects the signals of the input terminals W0 and W1, and outputs the signals as the first current source control signal TC1 when the reverse signal REV is in an active state. A third mux 205 for selecting a signal of the input terminal W1 and selecting a signal of the input terminal W0 when the reverse signal REV is in a passive state, and an acceleration signal of the acceleration signal generating means 204; Receives an output to the input terminal 20 and receives the brake signal output of the brake generating means 212 to the input terminal (Z1) to be selected by the reverse signal (REV) and output as a second current source control signal (TC2), the reverse signal When (REV) is active, the signal of the input terminal (Z1) And selecting said reverse signal is fetched sheave temporary fourth optical high speed search device of a laser disk, characterized in that consists of mux 213 to select the signal of the input terminal (Z0). 4. The optical high-speed search apparatus for a laser disk according to claim 3, wherein the amplifying means (303) comprises an inverted differential amplifier (AMP) having a feedback resistor (R1) and a signal resistor (R2). The optical high-speed search apparatus of claim 1, wherein the opic (107) is fixed to the pickup (108) and the encoder (106) is installed around the driving of the opic (107). In the optical high-speed search method of a laser disk, when the search key data is input, the search signal (SH) is set to be active, and after calculating a destination, the forward (inner) direction is reversed when its position moves to the current position. A first process of checking whether the direction is reverse, and a second process of setting a reverse signal REV as passive if the position to be moved in the first process is reverse, and actively setting the reverse signal REV if the moving position is not reverse. And a third process of calculating a breakpoint, which is a time point of decelerating the search speed after performing the second process, based on the destination position calculated in the first process, and outputting the calculated value as breakpoint data (RFDT). After checking that the search off signal SHOP is input after performing the third process, if the value is input, the search signal SH set in the first process is reset and then terminated. Method characterized in that it consists of a fourth step.

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