Optical disc recording apparatus

Claim 2

A recording/reproducing apparatus of an optical disc (1) for recording an information signal onto information tracks formed on said optical disc and reproducing the information signal recorded on the optical disc, comprising: a) disc driving means (19, 20) for rotating said optical disc (1) at a period T; b) an optical head (16) held on a carriage (27) and having a laser diode (5), an optical lens (10), optical converting devices (14, 15), and an actuator (9) of the optical lens, said optical head (16) irradiating a laser beam emitted from said laser diode (5) onto the optical disc (1) and converting the laser beam reflected by the optical disc into an electrical signal by a photoelectric converting device; c) laser driving means (23), electrically connected to said laser diode (5) of said optical head (16), for supplying a recording current or a reproduced current of the information signal to the laser diode; d) RF signal detecting means (36), connected to said optical head (16), for detecting the presence or absence of the electrical signal derived by said optical head; e) designating means (24) for setting the operating condition of said recording/reproducing apparatus into either a recording mode or a reproducing mode, said designating means being able to designate a plurality of N track sections on which the information signal is to be recorded when the recording mode is selected; f) optical head moving means (28, 29) for moving the optical head (1) in the radius direction of said disc and for moving the optical head (1) onto the first track section among said plurality of track sections selected by said designating means; g) system control means (25) having at least jump pulse generating/stopping means (258), said jump pulse generating/stopping means (258) generating a plurality of pulse signals of a period T 1 which is shorter than a rotational period T of the optical disc (1) when the recording mode is selected by said designating means (24); h) tracking control means (34) which receives the electrical signal derived by the optical head and the pulse signals from said jump pulse generating/stopping means (258) and is connected to said actuator (9) of the optical head (1), said tracking control means (34) supplying a current to said actuator (9), moving the position of said optical lens (10), positioning the laser beam onto the information track by the electrical signal obtained by said optical head, and sequentially moving the position of the optical lens in a stepwise manner from the first track section to the track section adjacent to said first track section by the jump pulse; and i) recording/reproducing control means (26), connected to said system control means (25) and said laser driving means (23), for allowing a reproduced current to be supplied to said laser diode (5) from the laser driving means while said jump pulse generating/ stopping means (258) in the system control means is generating the pulse signals of the period T 1 .

Claim 3

A recording/reproducing apparatus according to claim 1, wherein said jump pulse generating/stopping means stops the generation of the pulse signals after it has generated the (N 0 -1) pulse signals.

Claim 4

A recording/reproducing apparatus according to claim 1, wherein said jump pulse generating/stopping means stops the generation of the pulse signals when said RF signal detecting means (36) detects the electrical signal obtained by said optical head (16).

Claim 5

A recording/reproducing apparatus according to claim 1, wherein the number of pulse signals which are generated by said jump pulse generating/stopping means (258) is (N 0 -1).

Claim 6

A recording/reproducing apparatus according to claim 1, wherein said RF signal detecting means has a first detecting circuit of a high response speed and a second detecting circuit of a low response speed.

Claim 7

A recording/reproducing apparatus of an optical disc (1) for recording an information signal onto information tracks formed on said optical disc and reproducing the information signal recorded on the optical disc, comprising: a) disc driving means (19, 20) for rotating said optical disc (1) at a period T; b) an optical head (16) held on a carriage (27) and having a laser diode (5), an optical lens (10), optical converting devices (14, 15), and an actuator (9) of the optical lens, said optical head (16) irradiating a laser beam emitted from said laser diode (5) onto the optical disc (1) and converting the laser beam reflected by the optical disc into an electrical signal by a photoelectric converting device; c) laser driving means (23), electrically connected to said laser diode (5) of said optical head (16), for supplying a recording current or a reproduced current of the information signal to the laser diode; d) RF signal detecting means (36), connected to said optical head (16), for detecting the presence or absence of the electrical signal derived by said optical head; e) designating means (24) for setting the operating condition of said recording/reproducing apparatus into either a recording mode or a reproducing mode, said designating means being able to designate a plurality of No track sections on which the information signal is to be recorded when the recording mode is selected; f) optical head moving means (28, 29) for moving the optical head (1) in the radius direction of said disc and for moving the optical head (1) onto the first track section among said plurality of track sections selected by said designating means; g) system control means (25) having at least jump pulse generating/stopping means (258), said jump pulse generating/stopping means (258) generating a plurality of pulse signals of a period T, which is shorter than a rotational period T of the optical disc (1) when the recording mode is selected by said designating means (24) and stopping the generation of the pulse signals when the RF signal detecting means (36) detects the electrical signal obtained by said optical head (16); h) tracking control means (34) which receives the electrical signal derived by the optical head and the pulse signals from said jump pulse generating/stopping means (258) and is connected to said actuator (9) of the optical head (1), said tracking control means (34) supplying a current to said actuator (9), moving the position of said optical lens (10), positioning the laser beam onto the information track by the electrical signal obtained by said optical head, and sequentially moving the position of the optical lens in a stepwise manner from the first track section to the track section adjacent to said first track section by the jump pulse; i) recording/reproducing control means (26), connected to said system control means (25) and said laser driving means (23), for allowing a reproduced current to be supplied to said laser diode (5) from the laser driving means while said jump pulse generating/stopping means (258) in the system control means is generating the pulse signals of the period T 1 ; j) an address demodulator (35) to which the electrical signal obtained by the optical head is supplied and which demodulates an address signal of the track section from said electrical signal and supplies said address signal to said system control means (25); and k) a display circuit (50), connected to the system control means, for displaying the address signal or error signal supplied to the system control means from said address demodulator (35).

Claim 8

A recording/reproducing apparatus of an optical disc (1) for recording an information signal onto information tracks formed on said optical disc and reproducing the information signal recorded on the optical disc, comprising: a) disc driving means (19, 20) for rotating said optical disc (1) at a period T; b) an optical head (16) held on a carriage (27) and having a laser diode (5), an optical lens (10), optical converting devices (14, 15), and an actuator (9) of the optical lens, said optical head (16) irradiating a laser beam emitted from said laser diode (5) onto the optical disc (1) and converting the laser beam reflected by the optical disc into an electrical signal by a photoelectric converting device; c) laser driving means (23), electrically connected to said laser diode (5) of said optical head (16), for supplying a recording current or a reproduced current of the information signal to the laser diode; d) RF signal detecting means (36), connected to said optical head (16), for detecting the presence or absence of the electrical signal derived by said optical head; e) designating means (24) for setting the operating condition of said recording/reproducing apparatus into either a recording mode or a reproducing mode, said designating means being able to designate a plurality of No track sections on which the information signal is to be recorded when the recording mode is selected; f) optical head moving means (28, 29) for moving the optical head (1) in the radius direction of said disc and for moving the optical head (1) onto the first track section among said plurality of track sections selected by said designating means; g) system control means (25) having at least jump pulse generating/stopping means (258), said jump pulse generating/stopping means (258) generating a plurality of pulse signals of a period T, which is shorter than a rotational period T of the optical disc (1) when the recording mode is selected by said designating means (24) and stopping the generation of the pulse signals when the RF signal detecting means (36) detects the electrical signal obtained by said optical head (16); h) tracking control means (34) which receives the electrical signal derived by the optical head and the pulse signals from said jump pulse generating/stopping means (258) and is connected to said actuator (9) of the optical head (1), said tracking control means (34) supplying a current to said actuator (9), moving the position of said optical lens (10), positioning the laser beam onto the information track by the electrical signal obtained by said optical head, and sequentially moving the position of the optical lens in a stepwise manner from the first track section to the track section adjacent to said first track section by the jump pulse; i) recording/reproducing control means (26), connected to said system control means (25) and said laser driving means (23), for allowing a reproduced current to be supplied to said laser diode (5) from the laser driving means while said jump pulse generating/stopping means (258) in the system control means is generating the pulse signals of the period T 1 ; j) an address demodulator (35) to which the electrical signal obtained by the optical head is supplied and which demodulates an address signal of the track section from said electrical signal and supplies said address signal to said system control means (25); and k) a display circuit (50), connected to the system control means, for displaying the address signal or error signal supplied to the system control means from said address demodulator (35).