Abstract: In a device for controlling an operation of an anti-collision switch, the anti-collision switch is provided in a support close to a guide frame that is provided at at least one of both lateral sides of a table frame, to prevent collision of the table frame that is supported on the table support to be capable of moving in a lengthwise direction. The device includes a first lever coupled to the table support so that at least a portion of the first lever moves in a vertical direction according to deformation of the guide frame, and a second lever pressing the anti-collision switch in a normal state and, when a vertical movement of the first lever deviates from a preset height, being moved up by the first lever to remove pressing of the anti-collision switch and operate the anti-collision switch.

Abstract: In a device for controlling an operation of an anti-collision switch, the anti-collision switch is provided in a support close to a guide frame that is provided at at least one of both lateral sides of a table frame, to prevent collision of the table frame that is supported on the table support to be capable of moving in a lengthwise direction. The device includes a first lever coupled to the table support so that at least a portion of the first lever moves in a vertical direction according to deformation of the guide frame, and a second lever pressing the anti-collision switch in a normal state and, when a vertical movement of the first lever deviates from a preset height, being moved up by the first lever to remove pressing of the anti-collision switch and operate the anti-collision switch.

Abstract: In a device for controlling an operation of an anti-collision switch, the anti-collision switch is provided in a support close to a guide frame that is provided at at least one of both lateral sides of a table frame, to prevent collision of the table frame that is supported on the table support to be capable of moving in a lengthwise direction. The device includes a first lever coupled to the table support so that at least a portion of the first lever moves in a vertical direction according to deformation of the guide frame, and a second lever pressing the anti-collision switch in a normal state and, when a vertical movement of the first lever deviates from a preset height, being moved up by the first lever to remove pressing of the anti-collision switch and operate the anti-collision switch.

Abstract: In a device for controlling an operation of an anti-collision switch, the anti-collision switch is provided in a support close to a guide frame that is provided at at least one of both lateral sides of a table frame, to prevent collision of the table frame that is supported on the table support to be capable of moving in a lengthwise direction. The device includes a first lever coupled to the table support so that at least a portion of the first lever moves in a vertical direction according to deformation of the guide frame, and a second lever pressing the anti-collision switch in a normal state and, when a vertical movement of the first lever deviates from a preset height, being moved up by the first lever to remove pressing of the anti-collision switch and operate the anti-collision switch.

Abstract: A method of and apparatus for recording data on an optical recording medium form a mark or a space by using a recording waveform having an erase pattern containing a multi-pulse. The method and the apparatus prevent distortion of the mark or the space and improve a mark shape such that a recording/reproducing characteristic of the optical recording medium is improved.

Abstract: An optical recording medium is provided, the optical recording medium including a plurality of zones respectively corresponding to width data of first and/or last pulses of an adaptive write pulse waveform stored in a grouping table, the grouping table being configured to group a magnitude of a present mark of input data and magnitudes of leading and/or trailing spaces of the present mark into a short pulse group, a middle pulse group, and a long pulse group using grouping pointers, store data configured to calculate a width of a write pulse, an adaptive write pulse being generated in response to the calculated width, generate the adaptive write pulse waveform by varying a position of a rising edge of a first pulse of a mark to be written according to the magnitudes of the present mark and the leading space, the adaptive write pulse waveform being generated without regard for the trailing space of the present mark being written using the adaptive write pulse waveform, the adaptive write pulse being configured

Abstract: An optical recording medium is provided, the optical recording medium including a plurality of zones configured to store data corresponding to an adaptive write pulse, the adaptive write pulse including a first pulse, a last pulse, and a multi-pulse train, the adaptive write pulse being different for each of the plurality of zones, the plurality of zones being reflected by a grouping table, the grouping table being configured to generate an adaptive write pulse waveform by varying a position of a rising edge of a first pulse of a mark to be written according to a length of the mark to be written and a leading space, the adaptive write pulse waveform being generated without regard for a trailing space of a present mark being written using the adaptive write pulse waveform, the adaptive write pulse being configured to correspond to the adaptive write pulse waveform, and store rising edge data of the first pulse of the adaptive write pulse waveform varying according to corresponding stored values of lengths of m

Abstract: An apparatus configured to write input data on an optical recording medium using a write pulse waveform including a first pulse, a last pulse and a multi-pulse train is provided.

Abstract: An apparatus configured to write input data on an optical recording medium using a write pulse waveform, the write pulse waveform including a first pulse, a last pulse and a multi-pulse train, is provided.

Abstract: An apparatus configured to write input data on an optical recording medium using a write pulse waveform, the write pulse waveform including a first pulse, a last pulse and a multi-pulse train, is provided.

Abstract: An optical recording medium is provided, the optical recording medium including a plurality of zones respectively corresponding to width data of first and/or last pulses of an adaptive write pulse waveform stored in a grouping table, the grouping table being configured to group a magnitude of a present mark of input data and magnitudes of leading and/or trailing spaces of the present mark into a short pulse group, a middle pulse group, and a long pulse group using grouping pointers, store data configured to calculate a width of a write pulse, an adaptive write pulse being generated in response to the calculated width, generate the adaptive write pulse waveform by varying a position of a rising edge of a first pulse of a mark to be written according to the magnitudes of the present mark and the leading space, the adaptive write pulse waveform being generated without regard for the trailing space of the present mark being written using the adaptive write pulse waveform, the adaptive write pulse being configured

Abstract: An apparatus configured to write input data on an optical recording medium using a write pulse waveform including a first pulse, a last pulse and a multi-pulse train is provided.

Abstract: An optical recording medium is provided, the optical recording medium including a plurality of zones configured to store data corresponding to an adaptive write pulse, the adaptive write pulse including a first pulse, a last pulse, and a multi-pulse train, the adaptive write pulse being different for each of the plurality of zones, the plurality of zones being reflected by a grouping table, the grouping table being configured to generate an adaptive write pulse waveform by varying a position of a rising edge of a first pulse of a mark to be written according to a length of the mark to be written and a leading space, the adaptive write pulse waveform being generated without regard for a trailing space of a present mark being written using the adaptive write pulse waveform, the adaptive write pulse being configured to correspond to the adaptive write pulse waveform, and store rising edge data of the first pulse of the adaptive write pulse waveform varying according to corresponding stored values of lengths of m

Abstract: An adaptive writing method of a high-density optical recording apparatus and a circuit thereof. The circuit includes a discriminator for discriminating a magnitude of a present mark of input NRZI data and magnitudes of leading and/or trailing spaces of the input NRZI data, a generator for controlling the waveform of a write pulse in accordance with the magnitude of the present mark of the input NRZI data and the magnitudes of the leading and/or trailing spaces of the input NRZI data to generate an adaptive write pulse, and a driver for driving a light source by converting the adaptive write pulse into a current signal in accordance with driving power levels for respective channels of the adaptive write pulse. The widths of the first and/or last pulses of the write pulse waveform are varied in accordance with the magnitude of the present mark of input NRZI data and the magnitude of the leading and/or trailing spaces, thereby minimizing jitter to enhance system reliability and performance.

Abstract: An adaptive writing method of a high-density optical recording apparatus and a circuit thereof. The circuit includes a discriminator for discriminating a magnitude of a present mark of input NRZI data and magnitudes of leading and/or trailing spaces of the input NRZI data, a generator for controlling the waveform of a write pulse in accordance with the magnitude of the present mark of the input NRZI data and the magnitudes of the leading and/or trailing spaces of the input NRZI data to generate an adaptive write pulse, and a driver for driving a light source by converting the adaptive write pulse into a current signal in accordance with driving power levels for respective channels of the adaptive write pulse. The widths of the first and/or last pulses of the write pulse waveform are varied in accordance with the magnitude of the present mark of input NRZI data and the magnitude of the leading and/or trailing spaces, thereby minimizing jitter to enhance system reliability and performance.

Abstract: A method and apparatus to record data on an optical recording medium include generating a recording waveform having an erase pattern comprising a predetermined pulse having a high level which is higher than an erase power level and having a low level which is lower than the erase power level.

Abstract: A method and apparatus to record data on an optical recording medium include generating a recording waveform having an erase pattern comprising a multi-pulse having a high level which is higher than an erase power level and a low level which is lower than the erase power level. A power level of a leading one of the multi-pulse of the erase pattern and a power level between an end of the erase pattern and a start point of a leading pulse of a recording pattern are controlled to be the low level and the high level, respectively, the high level and the high level, respectively, the high level and the low level, respectively, or the low level and the low level, respectively.

Abstract: A method of and apparatus for recording data on an optical recording medium form a mark or a space by using a recording waveform having an erase pattern containing a multi-pulse. The method and the apparatus prevent distortion of the mark or the space and improve a mark shape such that a recording/reproducing characteristic of the optical recording medium is improved.

Abstract: A method of and apparatus for recording data on an optical recording medium form a mark or a space by using a recording waveform having an erase pattern containing a multi-pulse. The method and the apparatus prevent distortion of the mark or the space and improve a mark shape such that a recording/reproducing characteristic of the optical recording medium is improved.

Abstract: An information storage medium and a method and apparatus recording data to the information storage medium, the information storage medium having a write pattern for recording data, the write pattern including at least one pulse and a number of the at least one pulse being determined depending on a length of a recording mark. This makes it possible to record data using a write pattern having an optimal number of pulses, thereby preventing degradation in jitter characteristics due to residual heat or heat build-up caused by the use of unnecessary pulses even during high speed recording.