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公开(公告)号：JP2003241707A
公开(公告)日：2003-08-29
申请号：JP2002361282
申请日：2002-12-12
Applicant: CANON KK
Inventor： ABE NAOTO , INAMURA KOHEI , SAGANO OSAMU , SAITO YUTAKA , IKEDA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide an image display device and an image display method in which fluctuation in driving condition caused by electric resistivity of matrix wiring of a display panel can appropriately be corrected by employing a small amount of hardware. SOLUTION: The device is provided with a means which computes the amount of voltage drop caused by the resistivity of row wiring for inputted image data and computes image data (corrected image data) in which the amount of voltage drop is corrected. Moreover, overflow is prevented by the gain in an overflow processing circuit so that the image data that are corrected do not overflow the input range of a modulation means. Furthermore, saturation characteristic of phosphor is canceled by constituting a gradation converting section which changes the gradation converting characteristic by gain in the preceding stage of the constitution that corrects the effect of the voltage drop. Thus, a high quality image can be displayed. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003167546A
公开(公告)日：2003-06-13
申请号：JP2001367560
申请日：2001-11-30
Applicant: CANON KK
Inventor： ABE NAOTO , INAMURA KOHEI , SAGANO OSAMU , SAITO YUTAKA , IKEDA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide a device and method capable of preferably correcting variation of driving conditions due to electric resistance of the display panel matrix wiring by less hardware. SOLUTION: The image display device is provided with a γ-correction means for negating the characteristic of a display panel before a modulation means. Or, the image display device has a correction picture data calculation means for calculating correction image data in which an influence of a voltage drop in the scanning wiring is corrected, having a maximum value detection circuit, a gain calculation means, a gain limiting part, and a multiplier so as to prevent an overflow when the corrected image data are inputted to the modulation means; the gain limiter limits the gain so that the gain, an output of the gain calculation means, does not exceed the maximum gain value; the γ-correction means negates the characteristic of the display panel, and limits the corrected picture data or the image data so that the modulation means does not overflow. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2002148862A
公开(公告)日：2002-05-22
申请号：JP2000342933
申请日：2000-11-10
Applicant: CANON KK
Inventor： TAZAWA YAYOI , ITABASHI HITOSHI , AYAKI YASUKAZU , IKEDA TAKESHI
IPC: G03G9/087
Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacturing toners capable of manufacturing the toners which are sharp in a grain size distribution and sufficiently contain a toner composition exclusive of a binder resin. SOLUTION: The method of manufacturing the toners containing at least binder resin and coloring agents is characterized in that the toner composition exclusive of the binder resin is introduced by the following process steps into toner mother particles having at least the binder resin: 1) the process step of forming a dispersion system (a) by dispersing toner mother particles having at least binder resin in an aqueous medium; 2) the process step of forming a dispersion system (b) by dissolving or dispersing the toner composition exclusive of the binder resin into a softening agent to prepare a toner composition solution and dispersing this toner composition solution into the aqueous medium to prepare the toner composition-containing oil drop particles; 3) the process step of mixing the dispersion system (a) and the dispersion system (b) to form a mixed dispersion system (c) of both and introducing the toner composition into the toner mother particles by absorbing the toner composition solution into the toner mother particles and 4) process step of removing the softening agent from the toner mother particles.
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公开(公告)号：JP2001145017A
公开(公告)日：2001-05-25
申请号：JP2000266978
申请日：2000-09-04
Applicant: CANON KK
Inventor： IKEDA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To provide a video camera or the like employing an ND filter that can prevent its exposure from being fixed to an exposure state unintended by a photographer without changing the exposure state during AE locking. SOLUTION: An image pickup element 8 converts an image pickup light from an object through an image pickup lens 1 into an electric signal and a camera signal processing means 12 generates a video signal. Furthermore, a microcomputer 16 controls the lightness (exposure) of the video signal. In this case, when an AE lock switch 14 is operated to place/retract the ND filter 6 in/from an optical path, the microcomputer 16 restores the exposure state to the state before the ND filter 6 is placed in/retracted from the optical path.
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公开(公告)号：JPH10198068A
公开(公告)日：1998-07-31
申请号：JP35790596
申请日：1996-12-28
Applicant: CANON KK
Inventor： IKEDA TAKESHI , SATO YOSHIHIRO , TOKUNAGA YUZO , BABA YOSHINOBU , ITABASHI HITOSHI
Abstract: PROBLEM TO BE SOLVED: To form a toner image of high image quality while preventing or supporting deposition of a carrier and production of fog by specifying the constitution of the carrier and the toner. SOLUTION: The carrier used is a resin-coated magnetic carrier having such distribute of particle size that the number average particle size ranges 1 to 100μm and that the cumulative value of particles having Ωcm specific resistance in 5×10 V/m electric field and shows 40 to 220emu/cm magnetization in 1kOe magnetic field. The toner has such properties that the distribution of particle size shows 0.5 to 10.0μm number average particle size, =2 times diameter of the volume average particle size (d3 ),
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Patent Agency Ranking
公开(公告)号：JPH1097099A
公开(公告)日：1998-04-14
申请号：JP21121697
申请日：1997-07-23
Applicant: CANON KK
Inventor： BABA YOSHINOBU , IKEDA TAKESHI , AYAKI YASUKAZU , FUKUI TETSURO , TOKUNAGA YUZO , NAGAO YAYOI
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic toner having a sharp particle size distribution of fine toner particles, contg. a resin binder contg. a reduced amt. of a low mol.wt. component, having superior environmental stability and superior stability of a triboelectrically charged state, giving a high definition and high quality image and excellent in shelf stability. SOLUTION: This magnetic toner is obtd. by a polymn. method and contains a resin binder and fine metal oxide particles including magnetic fine particles. The resin binder has the max. peak Mp in the range of 4,000-100,000 and contains
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公开(公告)号：JPH1039547A
公开(公告)日：1998-02-13
申请号：JP8946197
申请日：1997-04-08
Applicant: CANON KK
Inventor： BABA YOSHINOBU , IKEDA TAKESHI , SATO YOSHIHIRO , TOKUNAGA YUZO , ITABASHI HITOSHI
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic coated carrier which shows excellent electrification property and does not cause deposition of the carrier when the carrier is used in combination with a small particle size toner, by controlling the distribution of particle size to a specified range and decreasing the amt. of such particles having a specified or smaller average particle size. SOLUTION: The magnetic coated carrier consists of magnetic carrier core particles and a coating layer which covers each core particle. The core particle contains at least binder resin and magnetic metal oxide particles. The magnetic metal oxide particles are subjected to such treatment to make the surface oleophilic. The core particle has >=1×10 Ω.cm specific resistance while the carrier has >=1×10 Ω.cm specific resistance. The number average particle size Dn of the carrier is 5 to 100μm and satisfies Dn/σ>=3.5 in the distribution of particle numbers, wherein σ is the standard deviation in the number distribution of the carrier. The proportion of carrier particles having
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公开(公告)号：JPH09281806A
公开(公告)日：1997-10-31
申请号：JP11853996
申请日：1996-04-16
Applicant: CANON KK
Inventor： TOKUNAGA YUZO , BABA YOSHINOBU , IKEDA TAKESHI
Abstract: PROBLEM TO BE SOLVED: To make image quality higher with excellent reproducibility in a fine line and without fogging with toner and the sticking of carriers and to prolong the lived of a latent image carrier and a developer by attaining contact two-component AC development using developing magnetic carriers whose resistance is actually high and magnetic force is low. SOLUTION: As the latent image carrier 2, a photoreceptor whose surface resistance is 1×10 -1×1016 Ω such as an amorphous silicone photoreceptor is used. When the development is attained by the contact two-component AC developing system, the carriers constituted so that the resistivity of carrier cores constituting the developing magnetic carriers is >=1×10 Ωcm and the resistivity of coating carriers is >=1×10 Ωcm are used. Further, the number average grain diameters of the magnetic carriers are set 5-100μm and the distribution cumulative value of the diameter of half of the number average grain diameter is set
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公开(公告)号：JPH08101532A
公开(公告)日：1996-04-16
申请号：JP26151294
申请日：1994-09-30
Applicant: CANON KK
Inventor： ITABASHI HITOSHI , MAYAMA SHINYA , IKEDA TAKESHI
Abstract: PURPOSE: To obtain a copied image with high resolution and excellent durability by using developer excellent in fixing ability at low temperature and thermal preservation stability. CONSTITUTION: In this image forming method, the one-component developer 6 is carried to a developing part opposed to an image carrier 1 by a developer carrier 3 while forming the developer 6 into a thin layer by an elastic regulating member 14 abutted on the developer carrier 3, and a latent image formed on the image carrier 1 is developed. The developer 6 is toner containing at least binder resin and colorant, and the binder resin has molecular weight distribution having at least one or more maximum values in gel permeation chromatography, in which the peak molecular weight is >=4000 and
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公开(公告)号：JPH083664B2
公开(公告)日：1996-01-17
申请号：JP2980087
申请日：1987-02-13
Applicant: CANON KK
Inventor： HYOZU YOSHIHIKO , IKEDA TAKESHI , MORI HIROMI , KAWAKAMI HIROAKI , KOBAYASHI KUNIKO , KANDA HITOSHI
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