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公开(公告)号：JPH08334535A
公开(公告)日：1996-12-17
申请号：JP14057595
申请日：1995-06-07
Applicant: CANON KK
Inventor： YAGI YOHEI , ASAI AKIRA , SAGANO OSAMU
Abstract: PURPOSE: To estimate an individual resistance element at a high speed and with good accuracy without breaking down a circuit in a network which contains the resistance element. CONSTITUTION: This in an apparatus for estimating the resistance of a resistive element for a network containing the resistive element. The apparatus is provided with row-direction wiring-end-current measuring parts (101, 102, 110, 103, 107, 105, 106), which select one out of row-direction wiring parts, which apply a voltage and which measure a transverse-direction wiring-end current, a node analytical equation at a terminal, an error equation by which the difference between a row-direction wiring-end estimation current and the row-direction wiring-end current measured by the row-direction wiring-end measuring parts becomes zero, and estimation parts (105, 104, 107) which estimate the resistance value of the resistive element on the basis of respective prescribed wiring resistance values of row/column-direction wiring parts.
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公开(公告)号：JP2003233344A
公开(公告)日：2003-08-22
申请号：JP2002178456
申请日：2002-06-19
Applicant: CANON KK
Inventor： SAGANO OSAMU , ABE NAOTO , SAITO YUTAKA , INAMURA KOHEI , IKEDA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide an image display device capable of preferably correcting variation in driving conditions due to electric resistance of matrix wiring of a display panel by using less hardware. SOLUTION: The image display device is provided with a corrected image data calculation means 14 for calculating corrected image data which are image data corrected in an influence of a voltage drop caused at least by the resistance portion of row wiring and a scanning means, an amplitude adjusting means having a function of adjusting an amplitude of the corrected image data Dout so that the amplitude of the corrected image data Dout corresponds to the input ranges of a modulation means 8, and the modulation means 8 for receiving the image data corrected in the amplitude and outputting a modulated signal to the column wiring. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003223131A
公开(公告)日：2003-08-08
申请号：JP2002170569
申请日：2002-06-11
Applicant: CANON KK
Inventor： SAGANO OSAMU , ABE NAOTO , SAITO YUTAKA , INAMURA KOHEI , IKEDA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide an image display apparatus in which a change of a drive condition resulting from an electrical resistance of a matrix wiring of a display panel can be adjusted by a small number of hardware. SOLUTION: An adjusted image data calculating means for calculating adjusted image data for reducing an influence of a voltage drop caused by the resistance of a row wiring for image data is provided with a discrete adjusted image data calculating part for setting a plurality of discrete image data reference values to the image data and calculating discrete adjusted image data for the image data reference values, and an adjusted image data interpolating part for interpolating the output of the discrete adjusted image data calculating part and calculating the adjusted image data corresponding to the size of the data of images. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003195799A
公开(公告)日：2003-07-09
申请号：JP2001395482
申请日：2001-12-26
Applicant: CANON KK
Inventor： IKEDA TAKESHI , SAITO YUTAKA , INAMURA KOHEI , ABE NAOTO , SAGANO OSAMU
Abstract: PROBLEM TO BE SOLVED: To provide a picture display device capable of suitably correcting variation in driving conditions due to electric resistance in the matrix wiring of a display panel by using lesser hardware, and further, to prevent a picture from being decreased in brightness, due to lesser frequent existence of rows with projectingly large corrected picture data. SOLUTION: The picture display device comprises a discrete correction data calculation part, a correction data interpolation part, and an arithmetic calculation part for calculating the correction data calculated by the correction data interpolation part and the picture data. Moreover, the picture display device comprises an amplitude adjustment means for adjusting the amplitude so that the amplitude of the corrected picture data corresponds to the input range of a modulation means when calculating the picture data and the correction data. Further, to eliminate the influence by the projectingly large corrected picture data, the amplitude adjustment is performed based on a statistical method. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003195797A
公开(公告)日：2003-07-09
申请号：JP2001390566
申请日：2001-12-21
Applicant: CANON KK
Inventor： IKEDA TAKESHI , SAITO YUTAKA , INAMURA KOHEI , ABE NAOTO , SAGANO OSAMU
Abstract: PROBLEM TO BE SOLVED: To provide a picture display device capable of suitably correcting variation in driving conditions due to electric resistance in the matrix wiring of a display panel by using lesser hardware. SOLUTION: The picture display device comprises a correction picture data calculation means for calculating correction picture data correcting an influence by a voltage drop caused by a resistance portion of the row wiring according to input picture data, an amplitude adjustment means having a function for adjusting the amplitude of the corrected picture data so that the corrected picture data calculated correspond to the input range of a modulation means, and the modulation means for modulating a driving waveform to be applied to the column wiring to the corrected picture data with the amplitude adjustment. Further, the amplitude adjustment means comprise a smoothing means provided with a filter in each row in order to prevent the display from being decreased in brightness when there are some rows having projectingly large corrected picture data in the display. COPYRIGHT: (C)2003,JPO
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Patent Agency Ranking
公开(公告)号：JP2003167542A
公开(公告)日：2003-06-13
申请号：JP2001367121
申请日：2001-11-30
Applicant: CANON KK
Inventor： INAMURA KOHEI , SAGANO OSAMU , ABE NAOTO , SAITO YUTAKA , IKEDA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide an image display device which can correct changes of driving conditions with the electric resistance that the matrix wiring of a display panel has with a small number of hardware and has superior gradations. SOLUTION: The device is equipped with a modulating means 8 of outputting a modulated signal according to corrected image data CData of inputted image data obtained by correcting changes of driving conditions for an image forming element due to the electric resistance of line wiring and a corrected image data computing means having a function of updating computation parameters for calculating the corrected image data Dout according to characteristics of the image forming means as a corrected image data computing means of generating the corrected image data Dout for the input image data Data in one horizontal scanning period. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003157040A
公开(公告)日：2003-05-30
申请号：JP2001353852
申请日：2001-11-19
Applicant: CANON KK
Inventor： SAITO YUTAKA , ABE NAOTO , SAGANO OSAMU
Abstract: PROBLEM TO BE SOLVED: To provide an image display device and an image display method capable of performing especially suitably correction for reduction of luminance caused by voltage drop. SOLUTION: In this image display device, a plurality of modulation wirings which are connected to a scanning line are divided into a plurality of blocks and characteristics of total numbers of lighting versus current values at the time entire blocks are uniformly lighted are preliminarily obtained by actual measurement or convergent calculation and suitable current values corresponding to voltage drop are obtained by storing these results in a memory by making the total numbers addresses.
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公开(公告)号：JP2003114639A
公开(公告)日：2003-04-18
申请号：JP2002170568
申请日：2002-06-11
Applicant: CANON KK
Inventor： SAGANO OSAMU , ABE NAOTO , SAITO YUTAKA
Abstract: PROBLEM TO BE SOLVED: To provide a picture display device capable of realizing excellent picture quality while correcting the voltage reduction being based on the electric resistance of wirings with simple constitution. SOLUTION: This picture display device is provided with a correction data calculating means 14 calculating correction data for correcting the effect of voltage dropping to be generated by resistant portions of row wirings with respect to inputted picture data and a number of gradation converting means 15 which converts the processes the number of gradation of the correction data and a modulation means 8 outputs a signal whose pulse width is modulated based on the correction data which are converted and processed by the number of gradation converting means 15 and which are outputted by the means 15 to respective column wirings.
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公开(公告)号：JP2002221933A
公开(公告)日：2002-08-09
申请号：JP2001349056
申请日：2001-11-14
Applicant: CANON KK
Inventor： YAMAZAKI TATSURO , MORI MAKIKO , SAGANO OSAMU
Abstract: PROBLEM TO BE SOLVED: To reduce the number of hardware for performing correction compensating the lowering of luminance due to the reduction of an element driving voltage. SOLUTION: This display device is provided with a display panel part 107 having image forming elements which are driven with the plural row wirings and column wirings arranged in a matrix shape on a substrate, a column wiring driving part 105 applying voltage pulses having pulse widths corresponding to luminance data to the plural column wirings, a row wiring driving part 106 scanning the plural row wirings by successively selecting them, a means which divides one horizontal scanning period into plural periods and calculates lowered amounts of voltage for every period, a correction amount calculating part 108 being a means calculating data of correction values for every above described period and an adding part 103 which outputs corrected luminance data by adding the data of correction values and the luminance data and the part 103 outputs the added results to the column wiring driving part 105 as required values of the releasing amount of electron beams.
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40.发明专利
公开(公告)号：JP2000310970A
公开(公告)日：2000-11-07
申请号：JP11633799
申请日：1999-04-23
Applicant: CANON KK
Inventor： KUNO MITSUTOSHI , SAGANO OSAMU , FUJII AKIRA
Abstract: PROBLEM TO BE SOLVED: To detect the condition of a discharging on a display panel, to detect the condition related to the discharging and to store history information of these conditions. SOLUTION: The display panel is constituted of an electron source, in which plural electron emitting elements are disposed, and plural spacers placed between face plates having phosphor which emit light by collision of electrons and a hermetically sealed housing that is almost evacuated. An anode electrode is provided on the face plate side. A high voltage is applied to the electrode to accelerate the electrons emitted from the electron source in the phosphor direction. A current detecting circuit 12 detects a discharging phenomenon, which is generated through the spacer by the application of a high voltage or the current related to the discharging. By constituting of the anode electrode with polurally divided electrodes, the place where discharging is generated is accurately determined.
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