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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：JPH08248920A
公开(公告)日：1996-09-27
申请号：JP13698695
申请日：1995-06-02
Applicant: CANON KK
Inventor： SUZUKI ASATAKE , SUZUKI HIDETOSHI , ASAI AKIRA , YAMANO AKIHIKO
Abstract: PURPOSE: To provide a multiple electron beam source and its driving method in which the strength of electron beams to be outputted is correct and which is provided with cold cathode elements wired in a matrix and a picture display device in which the deviation of display luminance is prevented. CONSTITUTION: In an electron beam generating device provided with plural cold cathode elements 201 arranged in matrix on a substrate, (m) lines of row wirings and (n) lines of column wirings with which plural cold cathode elements are wired in a matrix and a driving signal generating part generating signal for driving plural cathode elements and outputting electron beams in accordance with electron beam requiring values to be inputted from the outside simultaneously with one column, the driving signal generating part has a statistical quantity arithmetic part 206 performing statistical operations of electron beam requiring values, a correction value generating part 207 generating a correction value based on the arithmetic operation result of the statistical quantity arithmetic part 206, a synthesis part synthesizing electron beam requiring values and the correction value and driving parts 209, 202 driving cold cathode elements wired in the matrix based on output values of the synthesis part.
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公开(公告)号：JPH08118649A
公开(公告)日：1996-05-14
申请号：JP27840694
申请日：1994-10-18
Applicant: CANON KK
Inventor： ASAI AKIRA
Abstract: PURPOSE: To prevent the generation of the variation of the performance of a heating element caused by the substrate constituting the heating element by forming air bubble forming parts high in boiling start reproducibility on the surface of the heating element in a uniformly distributed state. CONSTITUTION: When voltage is applied between Al electrodes 7, the part held between the electrodes of an HfB2 resistor layer 6 generates heat and the liquid in contact with the surface 1 of a heating element is heated through the surface of the heating element. At this time, an air bubble is generated and grown in each of the recessed parts 2 provided to the surface of the heating element at temp. lower than that of other place. The air bubble thus formed is grown upwardly from the recessed parts 2 so as to crawl along the surface direction of the heating element and united with the air bubble grown from the adjacent recessed part before long to cover the entire surface of the heating element. Boiling is started from a large number of the recessed parts 2 almost at the same time and, since bubbling points are regularly arranged in a lattice form, the air bubbles are united over the entire surface region of the heating element almost at the same time. Therefore, the stability of a boiling state is high and the variation of performance due to the heating element is reduced.
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公开(公告)号：JPH07181902A
公开(公告)日：1995-07-21
申请号：JP32694993
申请日：1993-12-24
Applicant: CANON KK
Inventor： OKUDA MASAHIRO , ASAI AKIRA
Abstract: PURPOSE:To provide a plane type image forming device which is capable of maintaining electrical insulation between row direction wirings and column direction wirings over the entire part of the image forming device and is easily produced by conventional apparatus for production, to provide and a process for production of this device. CONSTITUTION:This plane type image forming device has an insulating substrate 13, a face plate 17 which has phosphors and faces the insulating substrate 13, plural pieces of spacer members 7 for supporting the, face plate 17 on the insulating substrate 13 and further, electron releasing elements 16 corresponding to pixels thereof. In addition, the plane type image forming device is formed with these electron releasing elements on rectangular strip-shaped insulating substrates 18 which are disposed separately from the insulating substrate 13 and continue in a column direction. This process is for production of such device. This plane type image forming device is also constituted by forming the electron releasing elements 16 on the spacer members and this process is for production of such device.
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公开(公告)号：JPH05116301A
公开(公告)日：1993-05-14
申请号：JP28159791
申请日：1991-10-28
Applicant: CANON KK
Inventor： INUI TOSHIJI , TAKIZAWA YOSHIHISA , SHIROTA KATSUHIRO , OKUMA NORIO , TAKENOUCHI MASANORI , MIYAGAWA MASASHI , ASAI AKIRA , NAKAJIMA KAZUHIRO , YAEGASHI HISAO
Abstract: PURPOSE:To enable high speed recording with uniform ink discharge all the time in an ink jet recording method wherein bubbles formed in ink by heat energy break into the outside air so that ink particles can be emitted. CONSTITUTION:A bubble 6 generated in the neighborhood of a heater 2a, as shown in (b), supplied with a pulse for heat generation expands as shown in (c) and bursts when exposed to the outside air as shown in (d). Thereafter, as shown in (e), a bubble 6a is generated in the neighborhood of a heater 2b to separate an ink particle 7a from the ink in an ink passage 12 so that the ink particle 7a can be emitted as shown in (f).
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Patent Agency Ranking66.发明专利
公开(公告)号：JPH0516365A
公开(公告)日：1993-01-26
申请号：JP16996291
申请日：1991-07-10
Applicant: CANON KK
Inventor： NAKAJIMA KAZUHIRO , TAKENOUCHI MASANORI , INUI TOSHIJI , TAKIZAWA YOSHIHISA , MIYAGAWA MASASHI , YAEGASHI HISAO , SHIROTA KATSUHIRO , OKUMA NORIO , ASAI AKIRA
IPC: B41J2/05
Abstract: PURPOSE:To enable a stable excellent image to be formed by a method wherein a bubble is formed by film boiling which has exceeded nucleate boiling by thermal energy, this bubble is interconnected to the open air near a discharge opening, and a passage is made not to be intercepted by the bubble under the interconnected state. CONSTITUTION:In a recording head wherein a heating element layer 2 is provided on a substrate, and a discharge opening 5... interconnected to a passage B is provided on a side of its surface and besides, a selective electrode E 1 and a common electrode E 2, a protective layer D, and a common liquid chamber C are provided, sudden rise in temperature by which a heating part between the electrodes E 1, E 2 causes film boiling according to a pulse signal corresponding to a recording signal from the electrodes E 1, E 2 is generated in a short time (at 300 deg.C or higher) to generate a bubble 6. Then, the bubble 6 is interconnected to the open air at an end part A to the heating element layer side 2 of the discharge opening 5 to form a stable liquid drop (a broken line 7). Further, a liquid passage B is made not to be thoroughly intercepted under a growing stage of the bubble at that time, and a good refilling characteristic for succeeding ink recording is secured.
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公开(公告)号：JPH0412862A
公开(公告)日：1992-01-17
申请号：JP11469190
申请日：1990-04-28
Applicant: CANON KK
Inventor： ASAI AKIRA , HIRASAWA SHINICHI
IPC: B41J2/05
Abstract: PURPOSE:To obtain a heat generating body to constitute a bubble jet printer head having a high pressure when bubbles are generated and accordingly a high discharging speed when liquid drops are discharged by using a heat generating element with such a surface that has the surface roughness of a heat operating part expressed by the maximum height according to JIS not larger than a critical radius of the bubble of ink at a specific temperature of the ink. CONSTITUTION:A surface oxidized SiO2 layer 22 is formed on the surface of an Si substrate 21, onto which an HfB2 resistance layer 23, an Al electrode 24, an SiO2 insulating layer (serving also as a protecting film) 25 and a Ta-Si-B protecting layer 26 are formed sequentially through sputtering, EB deposition, sputtering and sputtering, respectively. When the compositional ratio of the protecting layer 26 is changed, the particle size of crystals of Ta is changed and the surface roughness of the protecting layer 26 is changed. In this case, a base body for an ink jet recording head is such that has the surface roughness of the heat operating part expressed by the maximum height according to JIS not larger than the critical radius of the bubble of ink at a boiling point +100 deg.C of the ink.
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68.发明专利
公开(公告)号：JPH0412859A
公开(公告)日：1992-01-17
申请号：JP11447290
申请日：1990-04-28
Applicant: CANON KK
Inventor： ASAI AKIRA
Abstract: PURPOSE:To increase the efficiency to change thermal energy to energy of the movement of a fluid by specifying a value of a dimensionless number which is specific to a recording head and determined by the size of a heating thermal flux and, the shape and size of a flow passage. CONSTITUTION:When a liquid in a liquid passage is heated to generate bubbles, and jetted out by the utilization of the generated air bubbles, a value of a dimensionless number Z which is specific to a head and determined by the kind of the using liquid and the size of a heating thermal flux and the liquid passage, i.e., Z=(pi/6) TgK(pg/qo) /(pgLgaSHA) is set not smaller than 0.5 and not larger than 16. Tg is a critical superheating temperature of a main component of the liquid, Pg is a saturated vapor pressure of the main component of the liquid at the temperature Tg, Pg is a saturated vapor density of the main component of the liquid at the temperature Tg, Tg is a vaporization heat of the main component of the liquid at the temperature Tg, k is a thermal conductivity of the main component of the liquid at the temperature of the head before heating, (a) is a temperature conductivity of the main component of the liquid at the head temperature before heating, Po is a thermal flux heating the liquid, SH is a surface area of a part (thermal conducting surface) of a heat generating body heating the liquid, A is an inertance of the liquid passage when the heat conducting surface is a pressure source, a feed port and a discharge port of the liquid is an opening boundary and a wall defining the liquid passage is a fixed boundary, and piis the ratio of the circumference of a circle to its diameter.
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公开(公告)号：JPS60204350A
公开(公告)日：1985-10-15
申请号：JP6055284
申请日：1984-03-30
Applicant: CANON KK
Inventor： ASAI AKIRA
Abstract: PURPOSE:To provide the liquid pressure holding mechanism of a liquid jet recording apparatus wherein an apparatus for holding the liquid pressure in the jet nozzle is made simple and compact, being constituted so that a part of the wall surface of a liquid chamber, which is communicated with the jet nozzle and can be hermetically sealed except said communication part, is formed of an elastic film. CONSTITUTION:In a liquid jet recording apparatus at least a part of the wall surface of a liquid chamber 3, which is communicated with a liquid jet nozzle 1 and can be hermetically sealed except the communication part, is constituted of an elastic film 6 and a valve 5 for preventing the back flow of a liquid 4 once issued to the outside of the liquid chamber 3 is provided to the communication part of the liquid chamber 3 and the nozzle 1. This elastic film 6 is internally deformed to a curved surface from a plane surface in a free state and has force restored to the outside while the meniscus of the liquid at the leading end opening of the nozzle 1 always comes to a concaved surface other than a time when an energy generator 2 is operated and the liquid dripping from the nozzle 1 is prevented and, by applying voltage to the electrode 7 opposed to the leading end opening of the nozzle 1, the liquid 4 is injected from the nozzle 1 to perform recording.
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70.发明专利
公开(公告)号：JP2006224602A
公开(公告)日：2006-08-31
申请号：JP2005043934
申请日：2005-02-21
Applicant: CANON KK
Inventor： SUGIOKA HIDEYUKI , SHINJO KATSUHIKO , YAMAZAKI TAKEO , ASAI AKIRA , MURAI KEIICHI
IPC: B41J2/05
Abstract: PROBLEM TO BE SOLVED: To provide a liquid discharge head capable of utilizing efficiently an electric energy fed into a heating element to elevate temperature of an ink, and a recording apparatus with a low electric power consumption. SOLUTION: The liquid discharge head is equipped with a liquid droplet discharge port, a flow path 15 disposed in communication with the liquid droplet discharge port and filled with the liquid, a heating body 1 supported under a condition floated from the inner wall face of the flow path 15, and a heating and driving means 2 for heating the heating body 1 for a definite period. The thickness d1 of a protective film layer of the heating body 1, the thickness d2 of a heating resistance element layer 13, or the thickness d3 between the heating resistance element body layers, is made respectively thinner than the heat transmitting distances of the heat transmitted at respective parts. COPYRIGHT: (C)2006,JPO&NCIPI
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