Information recording apparatus, information recording method, and computer program
OwnerAkira Shirotainventor
Life of this patent
Estimating the term…
Abstract
An information recording apparatus carries out DC writing on a section B to change a reflectivity from a recording surface to display a visible character or image. Next, the apparatus writes record data on each of sections A to C under a special recording condition. The special recording condition is a recording condition that: makes excellent the recording characteristics of each of the sections A to C after the record data has been recorded, and sets the pulse width of a write signal for writing a shortest mark to be shorter than an optimum pulse width.
Claims19
-16. (canceled)
An information recording apparatus for irradiating a laser beam on an information recording surface of an information storage medium to record information, the information recording apparatus comprising:
- a visible-image forming means that irradiates, as a first write signal, a laser beam on the information recording surface under a first recording condition to form at least one of a visible character and a visible image on the information recording surface;
- and
- a record-data recording means that irradiates, as a second write signal, a laser beam on the information recording surface under a second recording condition to write record data on the information recording surface,
- wherein a first area on which the laser beam is irradiated by the visible-image forming means under the first recording condition and a second area on which the laser beam is irradiated by the record-data recording means under the second recording condition have at least partly an area on which the laser beam under the first recording condition and the laser beam under the second recording condition are overlappedly irradiated, and the area on which the laser beam under the first recording condition and the laser beam under the second recording condition are overlappedly irradiated is an area from which the record data is to be reproduced by irradiating a laser beam on the area.
An information recording method of irradiating a laser beam on an information recording surface of an information storage medium to record information, the information recording method comprising:
- a visible-image forming step that irradiates, as a first write signal, a laser beam on a first area of the information recording surface under a first recording condition to form at least one of a visible character and a visible picture on the first area;
- and
- a record-data recording step that irradiates, after execution of the visible-image forming step, a laser beam, as a second write signal, on a second area of the information recording surface under a second recording condition to write record data on the second area, the second area including the first area,
- wherein the second recording condition is to set a pulse width of the second write signal for writing a predetermined mark to be recorded to be shorter than an optimum pulse width of the second write signal for writing the predetermined mark.
An information recording method of irradiating a laser beam on an information recording surface of an information storage medium to record information, the information recording method comprising:
- a record-data recording step that irradiates, as a third write signal, a laser beam on a third area of the information recording surface under a third recording condition to write record data on the third area;
- a visible-image forming step that irradiates, after execution of the record-data recording step, a laser beam, as a fourth write signal, on at least part of the third area under a fourth recording condition to change a reflectivity of the information recording surface, thus forming at least one of a visible character and a visible picture on the at least part of the third area,
- wherein the third recording condition is to set a pulse width of the third write signal for writing a predetermined mark to be recorded to be longer than an optimum pulse width of the third write signal for writing the predetermined mark.
Dependencies are inferred from the claim text.