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AssigneeKoninklijke Philips Electronics N.V.
InventorsCornelius Hezemans, Hendrikus Looijmans
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The invention relates to a tray mechanism consisting of sliding means comprising an electrical tray motor, for moving a tray—provided for containing a disc (for example an optical disc) on which information is recorded—from a projected position, for the placement of the disc or its discharge, to a contained one, for the reproduction of recorded information, or reciprocally, and a drive power source, for supplying an applied voltage to said tray motor. Control means supply different values of the voltage applied to the tray motor according to different mechanical functions controlled by said motor. According to the invention, it is provided, for the tray steering, a motor current feed-forward loop comprising a first direct branch, itself comprising in series a first amplifier of the input voltage applied to the loop, the tray motor and a resistor, and a second branch, itself comprising in series a second amplifier and an adder, which receives on one input the input voltage applied to the loop and on the other one the output of said second amplifier.
A tray mechanism consisting of sliding means comprising an electrical tray motor, for moving a tray—provided for containing a disc on which information is recorded—from a projected position, for the placement of the disc or its discharge, to a contained one, for the reproduction of recorded information, or reciprocally, and a drive power source, for supplying an applied voltage to said tray motor, said sliding means also including control means for supplying different values of the voltage applied to the tray motor according to different mechanical functions controlled by said motor, wherein said sliding means includes, for the tray steering, a motor current feed-forward loop comprising the following elements:
A disc reproducing apparatus comprising an apparatus body, pickup means for picking up recorded information from a disc and a tray mechanism for sliding said disc, with respect to said apparatus body, either to a projected position, for the placement of the disc or its discharge, or to a contained position, for the reproduction of recorded information, said tray mechanism consisting of sliding means comprising an electrical tray motor and a drive power source for supplying an applied voltage to said tray motor, said sliding means also including control means for supplying different values of the voltage applied to the tray motor according to different mechanical functions controlled by said motor at different moments, wherein said sliding means includes, for the tray steering, a motor current feed-forward loop comprising the following elements:
Dependencies are inferred from the claim text.