• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The deck operating state monitoring circuit of the optical disc reproducing apparatus of the present invention includes a pull-up resistor connected between a power supply voltage and a node, a plurality of resistors and a supervisory switch connected in parallel between the node and the ground and having different resistance values. And a microcomputer for monitoring the voltage value applied to both ends of the serial connection circuit, recognizing the on / off state of the winding switch of each monitoring location, and determining the mechanism operation state according to the recognized result.
    公开号:KR19990014979A
    申请号:KR1019970036829
    申请日:1997-08-01
    公开日:1999-03-05
    发明作者:서정범
    申请人:윤종용；삼성전자 주식회사；
    IPC主号:
    专利说明:

    Deck Operation Status Monitoring Circuit of Optical Disc Playback Equipment
    BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc reproducing apparatus, and more particularly to a monitoring circuit that can save the number of ports of a microcomputer in a circuit for monitoring a deck operation state of an optical disc.
    In general, an optical disc reproducing apparatus such as a CDP installs a switch that is turned on / off in conjunction with the mechanism of the deck mechanism in order to monitor the operation state of the deck mechanism, and monitors the on / off operation state of each switch by the microcomputer. Configured to control operation.
    For example, as shown in Fig. 1, the monitoring point is the limit switch 12 of the optical pickup, the up switch 14 and the down switch 16 of the pickup transport unit, the close switch 18 and the open switch of the tray. In the case of a plurality of places such as (20), the input port of the microcomputer 10 is allocated one by one in correspondence with each monitoring location, so that the microcomputer port has been used a lot.
    Since many ports of the microcomputer are used to monitor the operation state of the mechanism mechanism, the designer has a lot of trouble in allocating the ports in order to realize more various functions within the limited number of ports of the microcomputer.
    SUMMARY OF THE INVENTION An object of the present invention is to provide a deck operating state monitoring circuit of an optical disc reproducing apparatus capable of monitoring a plurality of mechanical operating states with one microcomputer port in order to solve such problems of the prior art.
    In order to achieve the above object, the present invention provides a plurality of series connection circuits comprising a pull-up resistor connected between a power supply voltage and a node, a resistor and a supervisory switch connected in parallel with each other between the node and ground, and having different resistance values. And a microcomputer for monitoring the voltage values applied to both ends of the serial connection circuit, recognizing the on / off state of the winding switch of each monitoring location, and determining the mechanism operation state according to the recognized result.
    1 is a circuit diagram showing the configuration of a deck operation state monitoring circuit of a conventional optical disc reproducing apparatus.
    Fig. 2 is a circuit diagram showing the configuration of the deck operation state monitoring circuit of the optical disc reproducing apparatus according to the present invention.
    Hereinafter, with reference to the accompanying drawings will be described in more detail the present invention.
    2 shows the configuration of the deck operation state monitoring circuit of the optical disc reproducing apparatus according to the present invention. Referring to FIG. 2, the circuit of the present invention is connected to the pull-up resistor 32 connected between the power supply voltage Vcc and the node 30 and the node 30 and the ground in parallel to each other, and has different resistance values. Recognizing the on / off state of the winding switch of each monitoring site by monitoring the voltage value applied to the plurality of series connection circuits 38 including the resistor 34 and the supervisory switch 36 having the And the microcomputer 40 for determining the operating state of the instrument in accordance with the recognized result.
    Here, each resistor 34 has a different resistance value. Each supervisory switch is a limit switch of a pickup transport, an up switch and a down switch of a pickup transport section, a close switch and an open switch of a tray.
    The microcomputer 40 determines the on / off state of each switch, for example, by determining the voltage value as shown in Table 1 below. Here, the magnitude of the resistance value is assumed to be R1R2R3R4R5.
    Resistance combinationSwitch onMechanical operating stateControl operation R1Limit switchPickup Inner Circle Arrival StatusPickup Motor Stop R2Down switchPickup transfer unit down stateTilt motor forward stop R3UpswitchPickup Transfer DepartmentTilt motor reverse stop R4Close switchTray closed stateTray motor reverse stop R5Open switchTray open stateTray Motor Forward Stop R1R2R5 / R1 + R2 + R5Limit, down, open switchTray open with disk unloadedTray Close Motion Monitoring R3R4 / R3 + R4Up, Close switchPlay statusPlayback control
    As shown in Table 1, the microcomputer 40 determines the on state of the supervisory switch by recognizing a difference in voltage values according to a combination of resistance values connected to the node 30 according to the on state of the supervisory switch 36. .
    As described above, in the present invention, a plurality of switches may be connected to one input port of the microcomputer in parallel, and the port use of the microcomputer may be reduced by judging the on state of the switch based on the difference in resistance values of the resistors connected in series to each switch. have.
    This reduction in port usage has the advantage of facilitating the work of microcomputer design and adding new functions.
    权利要求:
    Claims (1)
    [1" claim-type="Currently amended] A pullup resistor connected between the supply voltage and the node;
    A plurality of series connection circuits connected in parallel to each other between the node and the ground and configured of a resistor and a supervisory switch having different resistance values; And
    And a microcomputer for monitoring the voltage values applied to both ends of the serial connection circuit, recognizing the on / off state of the winding switch of each monitoring location, and determining the mechanism operation state according to the recognized result. Deck operation status monitoring circuit.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-08-01|Application filed by 윤종용, 삼성전자 주식회사
    1997-08-01|Priority to KR1019970036829A
    1999-03-05|Publication of KR19990014979A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970036829A|KR19990014979A|1997-08-01|1997-08-01|Deck Operation Status Monitoring Circuit of Optical Disc Playback Equipment|
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