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1. 发明专利

JP2004229492A Controller for matrix converter 有权
公开(公告)号：JP2004229492A
公开(公告)日：2004-08-12
申请号：JP2003206040
申请日：2003-08-05
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AYANO HIDEKI , INABA HIROMI , YAMATO IKUO , FUJITA MAKOTO , TOYODA YASUTAKA , OKI SHIGERU , ONUMA NAOTO
IPC分类号： H02M5/27 , H02M5/297
摘要： PROBLEM TO BE SOLVED: To provide a controller for a matrix converter in which the number of PWM outputs from a micro-computer for a switching command is made fewer than eighteen which is the number of switching elements, in the controller for the three-phase output matrix converter. SOLUTION: A first PWM signals which has the number of systems fewer than the number of the switching elements is calculated and outputted by the micro-computer regarding the calculation of an output voltage command value. A circuit which calculates a second PWM signal having the number of the systems same as the number of the switching elements on the basis of the first PWM signal, output current information, and input voltage information is provided outside the micro-computer. COPYRIGHT: (C)2004,JPO&NCIPI

2. 发明专利

JP2001169126A METHOD AND DEVICE FOR REFERRING TO COLOR CONVERSION TABLE 失效
公开(公告)号：JP2001169126A
公开(公告)日：2001-06-22
申请号：JP35111099
申请日：1999-12-10
申请人： HITACHI LTD
发明人： TOYODA YASUTAKA , INUZUKA TATSUKI
IPC分类号： B41J2/525 , G06T1/00 , G09G5/06 , H04N1/46 , H04N1/60
摘要： PROBLEM TO BE SOLVED: To resolve the problem that there are a large number of lattice points where table values do not exist at generation time of a color conversion table which is independent of devices and color conversion of high accuracy in matching with a table quantity is impossible. SOLUTION: A table, where a color space independent of devices is subdivided, is used to rearrange lattice point positions in order to reduce unused areas of lattice points which are caused at the time of mapping the color space in a table of a rectangular parallelepiped, and thus a color conversion table of high accuracy which has more relations between an input signal and an output signal than a normal color conversion table can be generated. A table, which manages lattice point positions of the color conversion table, is used to acquire table values of color conversion table, and color conversion is performed.

3. 发明专利

JP2001054964A IMAGING APPARATUS 失效
公开(公告)号：JP2001054964A
公开(公告)日：2001-02-27
申请号：JP23212699
申请日：1999-08-19
申请人： HITACHI LTD
发明人： TOYODA YASUTAKA , INUZUKA TATSUKI
IPC分类号： B41J11/42
摘要： PROBLEM TO BE SOLVED: To prevent a malfunction caused by the leakage of light and reflected light from another apparatus by arranging a recording medium detector and a reflection characteristic detector to face each other. SOLUTION: After printing paper 20 is extracted from a paper tray 80, the reflective characteristics of the paper 20 are measured by a measurement part 81. A darkroom box is formed by making a box including a light source and a sensor adhere to the paper 20, and a darkroom box is used also between a paper sensing plate 83 and the paper 20. When the paper 20 is not set in the tray 80, the sensor measures the sensing plate 83. Since the plate 83 is processed to absorb light and absorbs light from the light source without reflecting it, the sensor outputs a low value. In this case, the absence of the paper 20 is recognized by a printer driver. When the output of the sensor is high in value, the specification of the paper 20 from measured data and the change of printing are made possible.

4. 发明专利

JP2002247403A IMAGE FORMING DEVICE AND IMAGE FORMING METHOD 失效
公开(公告)号：JP2002247403A
公开(公告)日：2002-08-30
申请号：JP2001045169
申请日：2001-02-21
申请人： HITACHI LTD
发明人： TOYODA YASUTAKA , INUZUKA TATSUKI
IPC分类号： B41J5/30 , B41J2/525 , H04N1/46 , H04N1/60
摘要： PROBLEM TO BE SOLVED: To provide an image forming device that outputs a color image on a recording medium and receives contents information denoting use of purpose and contents of data being a print object to automatically select a color material suitable for the contents. SOLUTION: The image forming device can select a suitable color material for contents of data to be printed out by building up a table data that selects a suitable color material from contents information denoting use of purpose and contents of print data and number of color materials in use and by entering the contents information such as use of purpose and contents of print data.

5. 发明专利

JP2001268384A COLOR SIGNAL PROCESSING APPARATUS 失效
公开(公告)号：JP2001268384A
公开(公告)日：2001-09-28
申请号：JP2000081737
申请日：2000-03-17
申请人： HITACHI LTD
发明人： INUZUKA TATSUKI , TOYODA YASUTAKA
IPC分类号： B41J5/30 , B41J2/525 , G03G15/01 , G06T1/00 , G06T5/00 , H04N1/46 , H04N1/60 , H04N9/00 , H04N9/64
摘要： PROBLEM TO BE SOLVED: To prevent the fluctuation of the reproducibility of a color due to the fluctuation of an environmental condition such as a temperature, humidity, and illumination or a recording medium such as a printing sheet or print ink. SOLUTION: This color signal processing apparatus is provided with an input device or an output device for a color image, a conversion chart for storing a conversion signal, based on ICC profile specifications, a means for measuring the factor of the fluctuation of equipment, a correction chart for storing a correction signal, based on a feedback signal from the measuring means, and a color converting means for converting a color signal, based on the conversion chart and the correction chart.

6. 发明专利

JP2001230923A IMAGE OUTPUT DEVICE AND IMAGE OUTPUT METHOD 失效
公开(公告)号：JP2001230923A
公开(公告)日：2001-08-24
申请号：JP2000041378
申请日：2000-02-15
申请人： HITACHI LTD
发明人： INUZUKA TATSUKI , TOYODA YASUTAKA
IPC分类号： B41J5/30 , B41J29/00 , G06F3/12 , G06T1/00 , H04N1/21 , H04N1/387
摘要： PROBLEM TO BE SOLVED: To take the countermeasures against information leakage and to easily make printed matter and electronic data correspond to each other at high speed by adding a management information, that is hard to be discriminated visually, to the printed matter. SOLUTION: The basic configuration of this device is provided with an image memory for storing image data and a means for applying signal processing for adding the managing information to a signal read out of the image memory. On the basis of the operating timing of the image output device such as a printer, image data are read out from the image memory, by using an address signal prepared by an address generating circuit, and are subjected to a signal processing based on the management information.

7. 发明专利

JP2001014119A IMAGE SIGNAL PROCESSOR 失效
公开(公告)号：JP2001014119A
公开(公告)日：2001-01-19
申请号：JP18836199
申请日：1999-07-02
申请人： HITACHI LTD
发明人： INUZUKA TATSUKI , TOYODA YASUTAKA
IPC分类号： G06F3/12 , B41J29/38 , H04N1/00 , H04N1/32 , H04N1/60 , H04N9/00 , H04N9/67
摘要： PROBLEM TO BE SOLVED: To enable a fast, detailed signal process by determining signal process order and allotment by combining the signal processing capabilities that plural devices have. SOLUTION: The devices connected by a cable or network use a communication controller 102 to inform themselves of their capabilities. Devices A and B have device capability memories 103 stored with their equipment capabilities and the capabilities of connected devices. Here, the device capability of a device, the transmission capability of a communication means, memory capacity, etc., stored in the device capability memory 103 are mutually reported. Then a management device 101 is used to determine the order of the signal process of a signal processor 104 and the allotment of the signal process by making use of information on their device capabilities. The management device 101 of the device A determines the order and allotment of the signal process by using received information and reports the determined order and allotment of the signal process to the device B by using the communication controller 102 to complete preparations.

8. 发明专利

JP2003116018A APPARATUS AND METHOD FOR PROCESSING IMAGE 审中-公开
公开(公告)号：JP2003116018A
公开(公告)日：2003-04-18
申请号：JP2001310355
申请日：2001-10-05
申请人： HITACHI LTD
发明人： TOYODA YASUTAKA , INUZUKA TATSUKI , TSUMURA MAKOTO , UCHIUMI YUKA
IPC分类号： B41J5/30 , G06T1/00 , G09G3/20 , G09G3/36 , G09G5/00 , G09G5/02 , G09G5/06 , H04N1/405 , H04N1/46 , H04N1/60 , H04N9/64
摘要： PROBLEM TO BE SOLVED: To obtain a color correction adapted to a gradation reproducing capability of a device without performing a complicated calculation by using a color correction table having a small memory capacity. SOLUTION: The method for processing an image uses the color correction table obtained by forming the table of the relationship between a discrete input color signal and an output color signal corresponding to the input signal. The method comprises steps of correcting the input color signal by a signal correcting unit 12, and obtaining the discrete input color signal similar to the corrected input color signal by an approximating unit 13. A table referring unit 14 refers to the color correction table, and outputs an output signal (gradation data and switching data) corresponding to the input color signal approximated by the approximating unit. An approximating error generating unit 17 calculates the approximating error from the difference between the input and the output to the approximating unit, and stores the error in a data storage unit 15. The stored approximating error is supplied to the correcting unit 12, and used for correcting the input signal. The switching data is used for a dither process, and a dither result is added to the gradation data, thereby napidly outputting the color correction result adapted to the gradation reproducing capability of the device.

9. 发明专利

JP2000307881A DEVICE AND METHOD FOR SIGNAL PROCESSING 失效
公开(公告)号：JP2000307881A
公开(公告)日：2000-11-02
申请号：JP10903499
申请日：1999-04-16
申请人： HITACHI LTD
发明人： INUZUKA TATSUKI , TOYODA YASUTAKA
IPC分类号： H04N1/46 , G06T5/00 , H03M7/30 , H04N1/405
摘要： PROBLEM TO BE SOLVED: To provide a signal processor capable of rapidly executing both conversion processing and error diffusion processing of a color signal, with a small circuit configuration. SOLUTION: This signal processor 11 is provided with a signal correction circuit 13, which corrects an input signal C with 8 bits per pixel sequentially inputted in each line by using the qantization error of ambient pixels caused through quantization processing thus far, a quantization circuit 14 which performs signal conversion of an input signal P that is corrected by the circuit 13 into an output signal Z with 4 bits per pixel, an error calculation circuit 15 which calculates a quantization error E by the part 14 and an error feedback circuit 16, which makes the error E feedback to the circuit 13 to be used to correct these inputted pixel input signals. Furthermore, a conversion table used in quantization processing of the circuit 14 and error calculation processing of the circuit 15 is integrated into one memory (internal memory of the circuit 14).

10. 发明专利

JP2000261653A IMAGE PROCESSING UNIT 失效
公开(公告)号：JP2000261653A
公开(公告)日：2000-09-22
申请号：JP6208999
申请日：1999-03-09
申请人： HITACHI LTD
发明人： TOYODA YASUTAKA , INUZUKA TATSUKI
IPC分类号： H04N1/04 , G06T1/00 , G06T3/00 , H04N1/387 , H04N1/393 , H04N1/409
摘要： PROBLEM TO BE SOLVED: To correct image data belonging to a distortion area at high speed by recognizing the distortion area corresponding to the binding margin section of an original, corresponding to luminance information of the image data. SOLUTION: An original shape storage section 20 detects the shape of an original and a distortion area corresponding to the binding margin of the original on the basis of the luminance of image data obtained by picking up the original placed on an original platen by an image pickup section 14, and a tilt correction arithmetic section 24 corrects the tilt of the original, when the original is tilted. A distortion correction arithmetic section 22 applies magnification processing to the image data belonging to the distortion area in the image data, whose tilt is corrected or the image data without a tilt according to a stored pattern in a parameter storage section 18 and applies luminance correction to the data to enhance the luminance and further applies luminance correction to emphasize the edge of characters/graphics to the picture data whose luminance is corrected.

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