Abstract: A light source that emits light, wherein, in coordinates in a CIE 1931 chromaticity diagram, the light has a color purity included in a region of 2 to 50 in a region surrounded by a line segment WB and a line segment WG that connect coordinates W (0.33, 0.33) indicating an achromatic color with coordinates B (0.091, 0.133) of 480 nm and coordinates G (0.373, 0.624) of 560 nm on a spectral locus, and the spectral locus, and has an area occupied by a continuous spectral wavelength in a wavelength region of 480 to 540 nm, of 15% or more relative to an area of an overall spectral wavelength of the light source at 380 to 780 nm.

Abstract: A light source that emits light, wherein, in coordinates in a CIE 1931 chromaticity diagram, the light has a color purity included in a region of 2 to 50 in a region surrounded by a line segment WB and a line segment WG that connect coordinates W (0.33, 0.33) indicating an achromatic color with coordinates B (0.091, 0.133) of 480 nm and coordinates G (0.373, 0.624) of 560 nm on a spectral locus, and the spectral locus, and has an area occupied by a continuous spectral wavelength in a wavelength region of 480 to 540 nm, of 15% or more relative to an area of an overall spectral wavelength of the light source at 380 to 780 nm.

Abstract: An optical disc apparatus comprising an optical disc drive for recording on and/or playing back an optical disc; a storage part for storing information; and a save control part for accumulating and saving error information in the storage part, the error information including information that indicates specific error contents in a case in which an error has been generated in the optical disc drive.

Abstract: An optical disc apparatus comprising an optical disc drive for recording on and/or playing back an optical disc; a storage part for storing information; and a save control part for accumulating and saving error information in the storage part, the error information including information that indicates specific error contents in a case in which an error has been generated in the optical disc drive.

Abstract: An optical disk apparatus includes an I/O port that connects to a port of a drive apparatus, and a storage unit that prestores manufacturing information in correspondence with device drivers. The optical disk apparatus further includes a controller that transmits a command indicating to return manufacturing information, to the drive apparatus via the I/O port. When manufacturing information is returned from the drive apparatus via the I/O port, the controller extracts a device driver corresponding to the returned manufacturing information from the device drivers in the storage unit. The controller then controls a reading operation or a recording operation of the drive apparatus on the optical disk, based on the extracted device driver.

Abstract: When device information is transmitted from a DVD recorder to a server, the server transmits selectable function information that is selectable in the DVD recorder side to the DVD recorder. If a reproducing function for MP3, for example, is selected from the selectable function information, the DVD recorder transmits information of reproducing function for MP3 to the server. The server transmits amount billed for the reproducing function for MP3 and the like to the DVD recorder. A user makes the DVD recorder transmit a password when the user approves the amount billed. If the server judges that the password is correct, the server transmits a firmware related to the reproducing function for MP3 to the DVD recorder, then the DVD recorder rewrites an existing firmware that is stored in a flash memory to a firmware on which the firmware related to reproducing function for MP3 is added.

Abstract: When device information is transmitted from a DVD recorder to a server, the server transmits selectable function information that is selectable in the DVD recorder side to the DVD recorder. If a reproducing function for MP3, for example, is selected from the selectable function information, the DVD recorder transmits information of reproducing function for MP3 to the server. The server transmits amount billed for the reproducing function for MP3 and the like to the DVD recorder. A user makes the DVD recorder transmit a password when the user approves the amount billed. If the server judges that the password is correct, the server transmits a firmware related to the reproducing function for MP3 to the DVD recorder, then the DVD recorder rewrites an existing firmware that is stored in a flash memory to a firmware on which the firmware related to reproducing function for MP3 is added.

Abstract: An optical disc recording and reproducing apparatus includes: an error occurrence deciding unit that decides whether or not a record error occurred during recording operation on an optical disc; an error information storing unit that stores record error information in a memory when the record error occurred; and an error information recording unit that reads out the record error information from the memory and records the record error information in a predetermined area on the optical disc when the recording operation is finished if a record error occurred during the recording operation.

Abstract: An optical disk apparatus includes an I/O port that connects to a port of a drive apparatus, and a storage unit that prestores manufacturing information in correspondence with device drivers. The optical disk apparatus further includes a controller that transmits a command indicating to return manufacturing information, to the drive apparatus via the I/O port. When manufacturing information is returned from the drive apparatus via the I/O port, the controller extracts a device driver corresponding to the returned manufacturing information from the device drivers in the storage unit. The controller then controls a reading operation or a recording operation of the drive apparatus on the optical disk, based on the extracted device driver.

Abstract: A photocatalyst and a manufacturing method therefore, in which the adhesion to a support is increased and a baking step is simplified. The photocatalyst comprises the support and a metallic oxide layer provided on the support by applying and baking a colloidal solution including at least a metallic oxide precursor on the support, wherein the metallic oxide layer includes a high density metallic oxide layer of a less porous structure and a low density metallic oxide layer of a more porous structure.

Abstract: A photocatalyst and a manufacturing method therefore, in which the adhesion to a support is increased and a baking step is simplified. The photocatalyst comprises the support and a metallic oxide layer provided on the support by applying and baking a colloidal solution including at least a metallic oxide precursor on the support, wherein the metallic oxide layer includes a high density metallic oxide layer of a less porous structure and a low density metallic oxide layer of a more porous structure.

Abstract: This invention relates to a photocatalyst and a manufacturing method therefore, in which the adhesion to a support is increased and a baking step is simplified. The photocatalyst comprises the support and a metallic oxide layer provided on the support by applying and baking a colloidal solution including at least a metallic oxide precursor on the support, wherein the metallic oxide layer includes a high density metallic oxide layer of a less porous structure and a low density metallic oxide layer of a more porous structure.

Abstract: This invention relates to a photocatalyst and a manufacturing method therefore, in which the adhesion to a support is increased and a baking step is simplified. The photocatalyst comprises the support and a metallic oxide layer provided on the support by applying and baking a colloidal solution including at least a metallic oxide precursor on the support, wherein the metallic oxide layer includes a high density metallic oxide layer of a less porous structure and a low density metallic oxide layer of a more porous structure.