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公开(公告)号：JP2003154655A
公开(公告)日：2003-05-27
申请号：JP2001358293
申请日：2001-11-22
Applicant: CANON KK
Inventor： SASAKI TOSHIAKI , TACHIHARA MASAYOSHI , TAMURA YASUYUKI , ASAI AKIRA , MURAI KEIICHI , KAWAI TSUTOMU , SUGAMA SADAYUKI
IPC: B41J2/05
Abstract: PROBLEM TO BE SOLVED: To provide a liquid discharge head for discharging considerably minute liquid droplets of the order of sub picoliters or smaller. SOLUTION: A reduced part 7, that is, a part having a transverse area of a discharge opening 4 abruptly reduced in comparison with the other part is set to a position recessed from a discharge opening face 5a as a face where the discharge opening 4 of a discharge opening plate 5 is opened. A discharged liquid forms a meniscus 8 and is held between the discharging opening face 5a and the reduced part 7 within the discharge opening 4. The reduced part 7 is located inside the liquid in a path from a liquid channel 3 to the discharge opening face 5a of the discharge opening plate 5.
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公开(公告)号：JP2000082381A
公开(公告)日：2000-03-21
申请号：JP25303898
申请日：1998-09-07
Applicant: CANON KK
Inventor： KIMURA KEIKO , OKUDA MASAHIRO , ASAI AKIRA
Abstract: PROBLEM TO BE SOLVED: To provide an electron emitting element in which the current flowing under impression of pulse voltage is constant during the period from the start of the pulse to its end. SOLUTION: An electron emitting element is equipped on a base board with a pair of element electrodes positioned opposingly and a conductive thin film installed between the element electrodes and having an electron emission part, wherein the base board is furnished at least with a high thermal conduction layer having a thermal diffusivity D2 and a low thermal conduction layer formed between the high conduction layer and conductive thin film and having a thermal diffusivity D1, and thereby the condition D1
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公开(公告)号：JPH1040806A
公开(公告)日：1998-02-13
申请号：JP11264197
申请日：1997-04-30
Applicant: CANON KK
Inventor： MITOME MASANORI , AEBA TOSHIAKI , MATSUTANI SHIGEKI , OKUDA MASAHIRO , TAKADA KAZUHIRO , ASAI AKIRA
Abstract: PROBLEM TO BE SOLVED: To improve efficiency, defined to be a ratio of the current flowing through a surface conduction electron emission element to the current of electrons migrating to a pull-up electrode by controlling an electric field applied to electrons, emitted in advance into the outside (vacuum) of an element. SOLUTION: This device consists of an electron emission element having a conductive film containing an electron emission part, and an electrode for pulling up electrons. In this case, an electrically insulated long narrow region 6 is formed on the conductive films 4 and 5, so as to divide the conductive films 4 and 5 between a high and low electric potential section. The shape of the insulated region 6 is roughly periodical, as a combination of a part bent toward a high electric potential section with a part bent toward a low electric potential section. The part bent toward a high electric potential section in a period of the insulated region 6 includes the continuous electric emission part in a linearly continuos shape.
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公开(公告)号：JPH08334536A
公开(公告)日：1996-12-17
申请号：JP14057695
申请日：1995-06-07
Applicant: CANON KK
Inventor： YAGI YOHEI , ASAI AKIRA , SAGANO OSAMU
Abstract: PURPOSE: To estimate an individual element resistance at a high speed and with high accuracy by a constitution which is provided with a transverse-direction wiring-end-current measuring process, a node analytical equation, an error equation, and a resistance-value estimation process. CONSTITUTION: Under the control of a central processing unit 107, respective longitudinal wiring terminals and respective transverse wiring terminals at a circuit 112 to be measured are selected sequentially one terminal by one terminal, a prescribed voltage +V and a prescribed voltage -V are applied, the current value of every transverse wiring terminal to be measured by an ammeter 111 is inputted to the unit 107 via an A/D converter 110 and a data input part 103 so as to be stored in a RAM 104. The initial value, the update value and the final estimation value of every surface conduction-type electron emission element resistance, a current value at every transverse wiring terminal and the resistance value of every prescribed wiring resistance are stored in the RAM 104. The estimation program of the surface conduction-type electron emission element resistance is stored in a ROM 105. The unit 107 sequentially reads and executes the estimation program which has been stored in the ROM 104. The result which has been stored by the unit 107 is displayed on a display 109 of a display device, a printer device or the like via a data output part 108.
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公开(公告)号：JPH08185815A
公开(公告)日：1996-07-16
申请号：JP32443194
申请日：1994-12-27
Applicant: CANON KK
Inventor： ASAI AKIRA , YAGI YOHEI
Abstract: PURPOSE: To find nodal point voltage of an electric element and a circuit at high speed by forming a single block by gathering nodal point equations related to respective wirings with respective wirings of an electrical network, and repeatedly finding the nodal point voltage per block unit. CONSTITUTION: Respective terminals of resistant elements connected with respective wirings of line directional wiring and line directional wiring are formed as a single group. Respective terminals of resistant elements connected with respective wirings of row directional wiring and row directional wiring are formed as a single group. An initial value is set in respective terminal voltages of the respective groups, and nodal point voltages of the respective terminals of an (n)th group are calculated and renewed on the basis of nodal point analyzing simultaneous equations related to nodal point voltages of the respective terminals of the (n)th group in the respective groups and initial values of nodal point voltages of respective terminals of a group except the (n)th group. Nodal point voltages of the respective terminals of the (n)th group are calculated and renewed on the basis of nodal point analyzing simultaneous equations of the (n)th group and the nodal point voltages of the respective terminals of the group except the renewed (n)th group. The fact that the nodal point voltages of the respective terminals before and after renewal are compared with each other for convergence is judged.
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Patent Agency Ranking
公开(公告)号：JPH08142326A
公开(公告)日：1996-06-04
申请号：JP30320094
申请日：1994-11-11
Applicant: CANON KK
Inventor： ASAI AKIRA
IPC: B41J2/05
Abstract: PURPOSE: To apply a constant voltage inclination and a heat distribution to a heating resistors having an arbitrary shape of the heating section by a method wherein electrodes are connected to a plurality of sections of the heating resistor to apply different electrode voltages having two or more levels thereto. CONSTITUTION: A heating section 9' formed between a gap of individual electrodes in a heating resistor layer 9 is in circular shaped and electrodes 1-6 are connected six positions on the circumference thereof. In order to achieve a constant voltage inclination inclined in one direction as shown by contour lines indicated by the dotted lines, voltages to the respective electrodes are applied so as to be in conformity with the contour lines. For example,voltages V1-V6 of the respective electrodes are set as V1=0, V2=Vd, V3=3Vd, V4=4Vd, V5=3Vd and V6=Vd. At that time, Vd is an arbitrary voltage value. As a result, a constant heat distribution uniformly enhances the durability of the heating resistors and makes boiling on the resistors start simultaneously, thereby enabling the high quality printing due to the stable bubble growing.
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77.发明专利
公开(公告)号：JPH0845418A
公开(公告)日：1996-02-16
申请号：JP19458794
申请日：1994-07-28
Applicant: CANON KK
Inventor： ASAI AKIRA , OKUDA MASAHIRO
Abstract: PURPOSE:To provide a manufacturing method of a surface conductive electron emission element used as an electron source for an image forming device or the like. CONSTITUTION:An electron emission section 2 made by a forming process is provided on a conductive thin film 3 for communication between electrodes 4 and 5 laid on a substrate 1. In this case, the forming process is undertaken by the application of pulse voltage where voltage V(t) over time (t) after voltage application is proportional to -1/4 except for the time immediately after application. As a result, the temperature of the thin film 3 does not continue to rise and the occurrence of an element defect can be prevented. Also, the dispersion of characteristics between each element can be reduced in the case of concurrently forming many elements.
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公开(公告)号：JPH07318603A
公开(公告)日：1995-12-08
申请号：JP11259794
申请日：1994-05-26
Applicant: CANON KK
Inventor： ASAI AKIRA
Abstract: PURPOSE:To analyze with high accuracy in terms of resistance values of elements disposed in a linear network and to intuitively grasp the analysis result even when a value of a wiring resistance between the elements is sufficiently small. CONSTITUTION:When a circuit 110 to be measured is a linear aggregate consisting of low-admittance elements and high admittance elements between the low-admittance elements, a terminal voltage of the circuit 110 is measured by means of a terminal voltage-measuring device 101 so that the measurement result and constant data peculiar for the circuit 110 to be measured are obtained. After that, the result is represented by a sum of an admittance matrix Y0 obtained by removing a low-admittance turning point and an admittance matrix Y1 obtained by removing a high-admittance turning point, i.e., Y=Y0+Y1. A node-node voltage vector V is represented by an approximate expression of V=V0+V1+...+Vn by utilizing a solutions {V0, V1,..., Vn} of recursion formulas Y0V0=I, Y0V1=--Y1V0...V0Vn=-Y1Vn-1.
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公开(公告)号：JPH07154790A
公开(公告)日：1995-06-16
申请号：JP30030593
申请日：1993-11-30
Applicant: CANON KK
Inventor： TACHIHARA MASAYOSHI , ASAI AKIRA
IPC: H04N19/19 , G06T7/60 , G06T9/00 , H04N5/92 , H04N7/24 , H04N19/00 , H04N19/42 , H04N19/423 , H04N19/426 , H04N19/507 , H04N19/85 , H04N19/91 , H04N19/93
Abstract: PURPOSE:To realize a simple processing method for moving picture recording, transmission, and reproducing which can be applied to media over a wide range, for example, a TV signal, HDTV, a personal computer, etc., in common. CONSTITUTION:With respect to a surface 1 of a solid body, shapes of original pictures are jointed in the xyt space. A picture element area (648X688 picture elements) in the x-y plane is equally divided into cells each of which consists of 8X8 picture elements. The number of cells is 4941. The rectangular parallelepipeds are piled on each cell (in the t-axis direction). Consequently, the number of rectangular parallelepipeds is 49410. The height of the rectangular parallelepiped corresponds to 0.2 seconds (six frames). A ratio R of the volume on the inside of the surface 1 in each rectangular parallelepiped to the volume of the rectangular parallelepiped is calculated and recorded. Concretely, the I sum total value of picture element data (0 or one) in a cell corresponding to each rectangular parallelepiped is summed for six frames, and an obtained value Rv is recorded or transmitted.
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公开(公告)号：JPH0760955A
公开(公告)日：1995-03-07
申请号：JP21403193
申请日：1993-08-30
Applicant: CANON KK
Inventor： ASAI AKIRA
Abstract: PURPOSE:To obtain a recording head having a novel heating element wherein heating distribution on a surface of a resistor is equalized and its recorder by a method wherein a heating resistor has a heating part of an approximately circularly annular or fan-like annular surface shape, and its thickness is varied inversely proportional to a distance in a radial direction from a central point of the surface shape. CONSTITUTION:When voltage is impressed by making a current (I) flow radially along a radial direction of a heating resistor, a thickness d (r) of a heating part of the heating resistor is varied inversely proportional to a radial distance (r) from a center of a surface shape. Thereby, a current density i (r) at any point on the heating part at a radial distance (r) apart from the center comes to be as given by the formula (I). In the formula theta is an angle of a fan-like annulus (2pi in the case of a circular annulus). Relation between 'the resistivity (rho) of the resistor and a heating value q (r) per unit time unit area is as given by the formula II. Therefore, the formula III is obtained.
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