Abstract: Provided are: a main memory 14 that stores image data, a peripheral region 44 being set to a certain value; and a CPU 12 that performs tonal steps conversion processing on the image data. The CPU 12 includes: a plurality of cores 16 that have a parallel processing function due to a plurality of threads 18 and that execute the tonal steps conversion processing in parallel; and a data cache memory 22 and program cache memory 20 that are provided corresponding to each of the plurality of threads 18. The core 16 specifies a region smaller than a size of the data cache memory 22, of the image data as an operand region 48, and causes the image data corresponding to said operand region 48 to be acquired from the main memory 14 into the data cache memory 22 and executes the tonal steps conversion processing on said operand region 48 without distinction of a central region 42 and the peripheral region 44.

Abstract: Provided are: a main memory 14 that stores image data, a peripheral region 44 being set to a certain value; and a CPU 12 that performs tonal steps conversion processing on the image data. The CPU 12 includes: a plurality of cores 16 that have a parallel processing function due to a plurality of threads 18 and that execute the tonal steps conversion processing in parallel; and a data cache memory 22 and program cache memory 20 that are provided corresponding to each of the plurality of threads 18. The core 16 specifies a region smaller than a size of the data cache memory 22, of the image data as an operand region 48, and causes the image data corresponding to said operand region 48 to be acquired from the main memory 14 into the data cache memory 22 and executes the tonal steps conversion processing on said operand region 48 without distinction of a central region 42 and the peripheral region 44.

Abstract: A print head control device 4 in an ink jet printer IJP includes a print head drive board 42c3, a PCIe, and an image processing computer 42c. The print head drive board 42c3 is configured by a circuit between the PCIe and the print head drive board 42c3,the circuit having an interface function and a print head drive function integrated therein. This circuit includes an FPGA configured to perform a rearrangement processing such that assigned page data is matched to alignment of print heads 50. Further, a device driver 42c7 which is control software for the print head drive board 42c3 performs an internal transfer processing of the assigned page data to the print head drive board 42c3.

Abstract: A print head control device 4 in an ink jet printer IJP includes a print head drive board 42c3, a PCIe, and an image processing computer 42c. The print head drive board 42c3 is configured by a circuit between the PCIe and the print head drive board 42c3, the circuit having an interface function and a print head drive function integrated therein. This circuit includes an FPGA configured to perform a rearrangement processing such that assigned page data is matched to alignment of print heads 50. Further, a device driver 42c7 which is control software for the print head drive board 42c3 performs an internal transfer processing of the assigned page data to the print head drive board 42c3.

Abstract: The lighting apparatus according to the present invention is a lighting apparatus which lights by emitting light through solid-state light-emitting devices using an AC power source, the lighting apparatus including an AC to DC conversion unit which converts AC from the power source into DC, and a power source device which includes a rectangular main single-side mounting board, on which a part of the AC to DC conversion unit is mounted, and a rectangular first single-side mounting sub-board, on which a remaining part of the AC to DC conversion unit is mounted, the power source device being shaped like a chopstick box laid out such that the long, rectangular mounting surface of the main single-side mounting board and the rectangular first single-side mounting sub-board face each other along a length-wise direction.

Abstract: A lighting apparatus according to the present invention includes: a voltage supply unit which supplies voltage; and a plurality of solid state light emitting devices which emit light using the voltage supplied by the voltage supply unit. The plurality of solid state light emitting devices are series-connected, the voltage supplied by the voltage supply unit is applied to the plurality of solid state light emitting devices which are series-connected, and the voltage supplied is set to a voltage such that a current flowing through each of the plurality of solid state light emitting devices is equal to or less than 1/N of the maximum rated current, where N is a number equal to or greater than 2.

Abstract: A lighting apparatus according to the present invention includes: a plurality of solid state light emitting devices; a holding unit which holds the plurality of solid state light emitting devices; a casing inside which the holding unit is disposed; a first terminal and a second terminal disposed at a longitudinal end of the casing; a third terminal and a fourth terminal disposed at the other longitudinal end of the casing; a first rectification unit which converts alternating current power, supplied from an external source to the first terminal and the third terminal, into direct current power, and to supply the direct current power to the plurality of solid state light emitting devices; and a second rectification unit which converts alternating current power, supplied from the external source to the second terminal and the fourth terminal, into direct current power, and to supply the direct current power to the plurality of solid state light emitting devices.