Patent application number | Description | Published |
20110138608 | METHOD FOR MANUFACTURING PRINTING DEVICE - A dither mask is used in a halftone process that is performed by the printer that includes the preceding and following heads. The dither mask includes preceding and following head storage regions. The preceding head storage region is used for a printing portion of the preceding head. The following head storage region is used for a printing portion of the following head. The dither mask is generated by determining, using comprehensive evaluation values, storage elements in which thresholds are to be stored under the condition that dots are permitted to be formed by the preceding and following heads at the same position in the region corresponding the overlapping regions. | 06-16-2011 |
20120212534 | FLUID-EJECTING DEVICE AND FLUID EJECTING METHOD - To minimize deterioration in the dispersion of dots in an overlapping region between heads, a fluid-ejecting device includes: (A) a first nozzle column having first nozzles for ejecting a fluid; (B) a second nozzle column having second nozzles for ejecting a fluid and arranged to form an overlapping region in which an end portion toward one end in the predetermined direction overlaps an end portion at another end of the first nozzle column; and (C) a controller for ejecting a fluid from the first nozzle column and the second nozzle column in accordance with dot data indicating a dot size converted from inputted image data and ejecting the fluid from the second nozzles in the overlapping region in accordance with dot data obtained from a halftone process performed after multiplying the usage rate of the second nozzle column by incidence rate data for each of the dot sizes. | 08-23-2012 |
20120218335 | CORRECTED VALUE CALCULATION METHOD AND PRINTING DEVICE - A density correction value calculation method for a printing device comprising: (A) determining the density of each pixel column composed of pixels aligned in the intersecting direction in a duty determination pattern, and also determining the density of each pixel column in the duty determination pattern; (B) specifying the total duty for which the lowest density of the pixel column densities of the overlapping regions is equal to or greater than the lowest density in the pixel columns of the non-overlapping regions; and (C) calculating a density correction value of the pixel columns using a density correction pattern formed with the specified total duty, and also calculating a density correction value so that the lowest density of the pixel column densities of the density correction pattern is a reference. | 08-30-2012 |
20120242729 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus is provided in which a position of a joint of a first yellow nozzle group and a second yellow nozzle group in a predetermined direction is offset from a position of a joint of a first magenta nozzle group and a second magenta nozzle group in a predetermined position and a position of a joint of a first cyan nozzle group and a second cyan nozzle group in the predetermined position, and the position of the joint of the first magenta nozzle group and the second magenta nozzle group in the predetermined position is the same as the position of the joint of the first cyan nozzle group and the second cyan nozzle group in the predetermined direction. | 09-27-2012 |
20120242737 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus: the medium-conveying part conveying the medium; the nozzles discharging ink droplets curable by light irradiation onto the medium; the light-irradiation part irradiating the medium with light; the medium-deforming part being arranged on the downstream side of the light-irradiation part, holding the medium from the front and back, and deforming the medium so that an irregular shape is formed in cross section; the controller performing an image-forming step, a light-irradiating step, and a medium-deforming step; in the image-forming step, the ink droplets being discharged by the nozzles to form an image on the surface of the medium; in the light-irradiating step, the ink droplets discharged onto the medium being irradiated with light by the light-irradiation part to cure the droplets; and in the medium-deforming step, the medium being released by the medium-conveying part after the medium is deformed by the medium-deforming part. | 09-27-2012 |
20120242740 | PRINTING METHOD - A printing method including: ejecting an ink which includes a designated compound is ejected from a first nozzle row which is relatively move in an intersection direction intersecting a direction along the nozzle row with respect to a medium, ejecting the ink while relatively moving in the intersection direction to the medium, from the end portion of a second nozzle row which is overlapped with the end portion of the first nozzle row in a direction along the nozzle row direction, wherein when nozzles of the nozzle rows which are partly overlapped with each other in a direction along the nozzle row share with each other to form a common dot line, the amount of ink ejected per unit area in the partly overlapping region is larger than the amount of ink ejected per unit area in a non-overlapping region. | 09-27-2012 |
20120242766 | PRINTING APPARATUS, PRINTING METHOD, AND PROGRAM - A printing apparatus includes a nozzle that ejects, onto a medium, photo-curing ink cured when irradiated with light, and an irradiation unit that irradiates, with the light, the photo-curing ink landed on the medium. Here, when printing an image on the medium by coating with the photo-curing ink, the photo-curing ink is ejected from the nozzle so that the photo-curing ink is coated on the medium with a smaller amount of ink than normally coated in a region inside an outer border of the image, and the photo-curing ink is cured by irradiating the image with the light from the irradiation unit. | 09-27-2012 |
20120242767 | PRINTING APPARATUS, PRINTING METHOD, AND PROGRAM - A printing apparatus includes a nozzle that ejects, to a medium, photo-curing ink cured when irradiated with light, and an irradiation unit that irradiates, with the light, the photo-curing ink landed on the medium. Here, when printing an image on the medium by coating with the photo-curing ink, the photo-curing ink is ejected from the nozzle so that unevenness is formed in an original edge of the image by having a pixel that forms a dot along the edge and a pixel that does not form the dot appeared, and the photo-curing ink is cured by irradiating the image with the light from the irradiation unit. | 09-27-2012 |
20120268537 | PRINTING APPARATUS, PRINTING METHOD AND PROGRAM - A printing apparatus includes a chromatic ink ejecting nozzle that ejects a chromatic photocuring ink which is cured upon irradiation of light onto a medium, an achromatic ink ejecting nozzle that ejects an achromatic photocuring ink which is cured upon irradiation of light onto the medium, and an irradiation section that irradiates the light onto the chromatic photocuring ink impacted on the medium. At a time of applying the chromatic photocuring ink to print an image on the medium, the printing apparatus performs a process of ejecting the chromatic photocuring ink on the medium, a process of ejecting the achromatic photocuring ink on the medium from the achromatic ink ejecting nozzle in such a way as to apply the achromatic photocuring ink along an edge of an application range of the chromatic photocuring ink, and a process of irradiate the light from the irradiation section to cure the photocuring ink. | 10-25-2012 |
20120268538 | PRINTING APPARATUS, PRINTING METHOD, AND PROGRAM - A printing apparatus is provided with an ink discharge nozzle which discharges photocurable ink which is cured when irradiated with light onto a medium, a surfactant nozzle which discharges a surfactant which has a substance which improves the wetting properties of the photocurable ink, and an irradiating section which irradiates the light onto the photocurable ink which has landed on the medium, wherein a process of discharging the surfactant from the surfactant nozzle onto the medium, a process of discharging the photocurable ink onto the medium, and a process of curing the photocurable ink by irradiating the light from the irradiating section are performed so that the surfactant is applied in the surroundings of the application range of the photocurable ink when an image is printed on the medium due to the application of the photocurable ink. | 10-25-2012 |
20120268539 | PRINTING APPARATUS, PRINTING METHOD, AND PROGRAM THEREFOR - A printing apparatus includes an ink ejection nozzle configured to eject therethrough a photo-curable ink, onto a medium; and an irradiation portion configured to irradiate the photo-curable ink having been applied to the medium with the light. Further, when printing of an image is performed onto the medium by applying the photo-curable ink, the printing apparatus ejects the photo-curable ink onto the medium such that the photo-curable ink is applied onto an increased portion of an area resulting from expansion of at least one original area, in an outward direction of the at least one original area from an entire edge thereof; the printing apparatus cures the photo-curable ink having been applied onto the medium by irradiating the photo-curable ink with the light from the light irradiation portion; and the printing apparatus removes the photo-curable ink having been applied onto the increased portion from the medium. | 10-25-2012 |
20120293593 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus includes a head section which discharges a first ink which is cured due to the irradiation of light and a second ink which is a clear ink which is cured due to the irradiation of light and an irradiation section which irradiates the light, wherein a first image is formed by the light being irradiated with regard to the first ink which is discharged onto the medium, a second image is formed by the light being irradiated with regard to the second ink which is discharged onto the first image and the medium, a region where the first image is formed is included in a region where the second image is formed, and the discharge amount of the second ink per unit region is equal to or less than the discharge amount of the first ink per unit region. | 11-22-2012 |
20120313992 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus including a head section which discharges a color ink which is cured due to irradiation of light and a clear ink which is cured due to the irradiation of light, an irradiation section which irradiates the light, and a storage section which stores a relationship between a total amount of color duty which is an amount of the color ink which is discharged per unit region and clear duty which is an amount of the clear ink which is discharged per unit region, and glossiness of an image which is printed using the color ink and the clear ink which have been discharged, wherein, according to the color duty in a certain region in the image, the clear duty in the region is determined based on the relationship so that the glossiness of the image is a predetermined value. | 12-13-2012 |
20130100191 | PRINTING APPARATUS AND PRINTING METHOD - A head unit is provided that includes a plurality of head groups having a first head and a second head in a direction which crosses a transport direction of a medium. Color difference is obtained which indicates difference in color between patches formed for each band using dots having the same dot diameter from among a plurality of patches based on the result of color measurement performed on a test pattern which includes the plurality of patches for each band, the plurality of patches being formed for each head group using dots having different dot diameters. The amount of first ink and the amount of second ink, which are respectively ejected from the first head and the second head which are included in all the head groups, are adjusted such that the dot diameter becomes the dot diameter which is determined based on the color difference. | 04-25-2013 |
20140232775 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus including a head section which discharges a color ink which is cured due to irradiation of light and a clear ink which is cured due to the irradiation of light, an irradiation section which irradiates the light, and a storage section which stores a relationship between a total amount of color duty which is an amount of the color ink which is discharged per unit region and clear duty which is an amount of the clear ink which is discharged per unit region, and glossiness of an image which is printed using the color ink and the clear ink which have been discharged, wherein, according to the color duty in a certain region in the image, the clear duty in the region is determined based on the relationship so that the glossiness of the image is a predetermined value. | 08-21-2014 |
20140247308 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus is provided in which a position of a joint of a first yellow nozzle group and a second yellow nozzle group in a predetermined direction is offset from a position of a joint of a first magenta nozzle group and a second magenta nozzle group in a predetermined position and a position of a joint of a first cyan nozzle group and a second cyan nozzle group in the predetermined position, and the position of the joint of the first magenta nozzle group and the second magenta nozzle group in the predetermined position is the same as the position of the joint of the first cyan nozzle group and the second cyan nozzle group in the predetermined direction. | 09-04-2014 |
20140285558 | METHOD OF ADDING GLOSS CONTROL TABLE - In a method of adding a gloss control table, first base material information formed from a first gloss control table of a first base material and a first pattern measurement value of a test pattern formed on the first base material, and second base material information formed from a second gloss control table of a second base material and a second pattern measurement value of a test pattern formed on the second base material, are stored in the storage unit. The method includes: measuring a pattern of new base material for measuring the test pattern formed using a predetermined amount of ink of a new recording medium, and interpolating the gloss control tables for obtaining a new gloss control table of the new base material using a predetermined measured value interpolation method based on the first base material information and the second base material information. | 09-25-2014 |
20140292861 | LIQUID DISCHARGING APPARATUS AND LIQUID DISCHARGING METHOD - There is provided a liquid discharging apparatus including: a first nozzle row and a second nozzle row in which nozzles for discharging liquid are lined up in a predetermined direction; and a control unit, in which the control unit, when a value of the input data of the image is at least in a partial range, obtains a corrected discharging rate which is a discharging rate smaller than a discharging rate in the non-overlapped region with respect to the value of the input data at least in the partial range of the input data, and discharges the liquid from the nozzles of the first nozzle row and the second nozzle row depending on the corrected discharging rate, and a predetermined recording duty which is a recording duty higher than a recording duty in the non-overlapped region, in the overlapped region. | 10-02-2014 |
20140292862 | LIQUID DISCHARGING APPARATUS AND LIQUID DISCHARGING METHOD - There is provided a liquid discharging apparatus including: a first nozzle row and a second nozzle row in which nozzles for discharging liquid are lined up, and the second nozzle row is disposed by forming an overlapped region in which an end portion of one side in a predetermined direction is overlapped with an end portion of the other side in the predetermined direction of the first nozzle row; and a control unit which discharges liquid from the first nozzle row and the second nozzle row depending on input data of an image and a recording duty for discharging liquid, increases a recording duty in the overlapped region with respect to a recording duty in a non-overlapped region which is a region other than the overlapped region, and differentiates increased amounts of the recording duty in the overlapped region from each other depending on the input data. | 10-02-2014 |
20140292863 | METHOD OF ACQUIRING CORRECTION VALUE AND METHOD OF MANUFACTURING LIQUID DISCHARGING APPARATUS - There is provided a method of acquiring a correction value of a liquid discharging apparatus that includes a first nozzle row, a second nozzle row, a third nozzle row, and a fourth nozzle row, the method includes: acquiring the amount of deviation (heterogeneous row error) of a dot formed by the third nozzle row in the predetermined direction, acquiring the amount of deviation (overlapping area error) between the dot formed by the third nozzle row and a dot formed by the fourth nozzle row in the predetermined direction, and acquiring a correction value which causes discharge data assigned to the fourth nozzle row to shift in the predetermined direction based on the heterogeneous row error and the overlapping area error. | 10-02-2014 |
20140292870 | METHOD FOR CALCULATING COMPENSATION VALUE - A method for calculating a compensation value for use in a correction of a liquid landing position in a liquid ejection device provided with a first head for ejecting a first colored liquid and a second head for ejecting a transparent liquid includes, when forming a test pattern on a medium, forming the test pattern by feeding the first colored liquid to the second head and causing the second head to eject the first colored liquid, and obtaining a compensation value for a correction of a landing position of a liquid ejected by the second head on the basis of the test pattern formed on the medium. | 10-02-2014 |
20140292928 | PRINTING APPARATUS - A printing apparatus includes: a supporting member which supports a medium; a transport device which transports the medium; first to fourth heads which eject first to fourth radiation curable type inks; a first irradiation section; a second irradiation section; a third irradiation section; and a fourth irradiation section which is arranged on the downstream side of the fourth head, in which the radiation rays respectively irradiated from the first irradiation section to the third irradiation section have a peak wavelength of 350 nm to 450 nm, and coloring materials included in the third ink and the fourth ink have higher absorption properties of the radiation rays with the peak wavelength than coloring materials included in the first ink and the second ink. | 10-02-2014 |
Patent application number | Description | Published |
20110273499 | METHOD FOR DETECTING ADJUSTMENT VALUE OF FLUID EJECTION DEVICE, AND FLUID EJECTION DEVICE - An adjustment method is a method for adjusting a fluid ejection device having first and second heads with the first head disposed on an upstream side of the second head in a feed direction in which a medium is conveyed, the second head forming dot rows of a fluid between dot rows of the fluid formed by the first head. The first head and the second head are driven with a first voltage change amount to form a first test pattern, and the first head and the second head are driven with a second voltage change amount to form a second test pattern. | 11-10-2011 |
20110273729 | FLUID EJECTION DEVICE, PROGRAM, AND FLUID EJECTION METHOD - A fluid ejection device includes first, second and third nozzle rows for forming first, second and third band images, respectively. The fluid ejection device forms an image in which an edge portion at one side in a prescribed direction in the first band image overlaps an edge portion at the other side in the second band image, and an edge portion at one side in the second band image overlaps an edge portion at the other side in the third band image. The fluid ejection device carries out a halftoning process whereby a center area of a dither mask equal in size to the input data for forming a band image but having a smaller dot generation rate in the edge areas than in the center area is associated with the input data for forming the edge portion to the other side of the first band image. | 11-10-2011 |
20120092684 | PRINTING DEVICE AND PRINTING METHOD - The invention includes a dot formation section having nozzle rows of lined up nozzles, and adapted for forming a plurality of dot lines of a plurality of lined-up dots by ejecting ink from the nozzle rows while bringing about relative movement of the nozzle rows and a medium; a detection section for detecting dot width in a given dot line; and a correction value adjustment section for comparing dot width detected by the detection section and dot width stored in a storage section, and respectively correcting concentration correction values in the correction data according to the comparison results. | 04-19-2012 |
20120206525 | FLUID-EJECTING DEVICE AND FLUID-EJECTING METHOD - To minimize any decrease in image quality, even in an instance in which there is a displacement in a landing position of a fluid in a region in which nozzle rows overlap, (A) a fluid-ejecting device including: a first nozzle column; (B) a second nozzle column, the second nozzle column being arranged so as to form an overlapping region; and (C) a control part for causing the fluid to be ejected so that in each of a plurality of raster lines arranged in a row in the predetermined direction in the overlapping region, dots to be formed are apportioned between the first nozzles and the second nozzles; the control part causing the fluid to be ejected so that there are produced. | 08-16-2012 |
20120242728 | PRINTING APPARATUS AND PRINTING METHOD - To prevent uneven gloss on a printed image in a printing apparatus in which light-curable ink is used, a printing apparatus is provided. The printing apparatus includes a controller controls medium-conveying parts for conveying a medium so that the medium supplied from an upstream side is released on a downstream side; nozzles for discharging ink droplets cured by light irradiation onto the medium; a light-irradiation part for irradiating the medium with light; and medium-deforming parts arranged on the downstream side of the nozzles, holding the medium from the front and back, and deforming the medium so that an irregular shape is formed in cross section; the medium is conveyed downstream by the medium-conveying parts after the medium is deformed by the medium-deforming parts; droplets of ink are discharged from the nozzles to form an image on the surface of the medium; and the ink droplets discharged onto the medium are irradiated with light by the light-irradiation part to cure the droplets. | 09-27-2012 |
20130235135 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus having a head unit that ejects a yellow UV curable-type ink onto a medium, an irradiating section that irradiates the UV light, and a controller that works as follows: when the first mode is set, control is carried out so that, after the UV light with the first energy is irradiated on the UV curable-type ink ejected onto each unit area of the medium, the UV light with the second energy higher than the first energy is irradiated; when the second mode is set for printing an image with a glossiness higher than that of the image printed according to the first mode, control is carried out so that the UV light with an energy higher than that of the first energy is irradiated on the UV curable-type ink ejected on unit area of the medium. | 09-12-2013 |
20130278670 | PRINT CONTROL DEVICE AND PROGRAM - A plurality of test patterns that are disposed in a predetermined direction are printed using dot arrays formed along an intersecting direction interesting with the predetermined direction using nozzles included in an overlapping portion of a first nozzle array and a second nozzle array, a plurality of rules lined in the predetermined direction are printed so as to be adjacent to the test patterns using nozzles included in the first nozzle array and the second nozzle array, density correction values are computed according to density of each of raster lines of the test patterns, and the positions of nozzles specified from the positions of rules are associated with the positions of the raster lines for which density correction values are computed. | 10-24-2013 |
20130286085 | PRINTING APPARATUS AND PRINTING METHOD - There is provided a printing apparatus including: a transport unit which transports a medium in a transport direction, a first head, a first light source which is provided further to the downstream side in the transport direction than the first head, a second head which is provided further to the downstream side in the transport direction than the first head and the first light source, and a second light source which is provided further to the downstream side in the transport direction than the second head and which irradiates light with a stronger irradiation energy than the irradiation energy of the first light source, in which the first head ejects ink of one color of any among magenta ink, cyan ink, and black ink onto a medium, and the second head ejects yellow ink onto the medium. | 10-31-2013 |
20130286095 | PRINT APPARATUS AND PRINT METHOD - A print device is provided with a conveyance unit for conveying a medium in a conveyance direction; a magenta head; a cyan head; a black head; a yellow head; a first light source; a clear head; and a second light source. The first light source is provided downstream in the conveyance direction than the color ink heads; the clear head is provided downstream than the first light source; the second light source is provided downstream than the clear head; and, where the irradiation energy needed for the main curing of the color inks is Pc, the irradiation energy needed for the main curing of the clear ink is Pcl, the irradiation energy of the first light source is P | 10-31-2013 |
20150062237 | PRINTER, PRINTER CONTROL METHOD, AND WETTABILITY ENHANCEMENT TREATMENT DEVICE - A printer or the like is provided that can perform wettability enhancement treatment as necessary. The printer includes a discharge unit | 03-05-2015 |
20150062269 | PRINTER, PRINTER CONTROL METHOD, AND LIGHT IRRADIATION DEVICE - A printer or the like is provided that can increase adhesiveness between cured photo curable ink and a print medium as necessary. The printer includes a discharge unit | 03-05-2015 |
Patent application number | Description | Published |
20080303983 | DISPLAY DEVICE - The invention is directed to a higher contrast in a display device having a lighting device as a front light. A lighting portion is attached to a reflective liquid crystal display portion. A first transparent substrate and a second transparent substrate made of a glass substrate etc. are attached to each other with a sealing layer coated on those peripheral portions therebetween. The back surface of the first transparent substrate is attached to the reflective liquid crystal display portion, and an organic EL element is formed on the front surface of the first transparent substrate. The organic EL element is sealed in a space surrounded by the first transparent substrate, the second transparent substrate, and the sealing layer. The organic EL element is formed in a region corresponding to a pixel region of the reflective liquid crystal display portion. A desiccant layer is formed on the front surface of the second transparent substrate. | 12-11-2008 |
20080309850 | DISPLAY DEVICE - The invention is directed to a higher contrast in a display device having a lighting device as a front light. A lighting portion is attached to a reflective liquid crystal display portion. A first transparent substrate and a second transparent substrate made of a glass substrate etc. are attached to each other with a sealing layer coated on those peripheral portions therebetween. The back surface of the first transparent substrate is attached to the reflective liquid crystal display portion, and an organic EL element is formed on the front surface of the first transparent substrate. The organic EL element is sealed in a space surrounded by the first transparent substrate, the second transparent substrate, and the sealing layer. The organic EL element is formed in a region corresponding to a pixel region of the reflective liquid crystal display portion. A desiccant layer is formed on the front surface of the second transparent substrate. | 12-18-2008 |
20100231825 | ILLUMINATION APPARATUS, DISPLAY APPARATUS, AND ELECTRONIC DEVICE INCLUDING A DISPLAY APPARATUS - An illumination apparatus includes: a substrate; reflective layers formed upon the substrate; and light-emitting layers formed upon respective reflective layers and disposed so as to overlap the respective reflective layers when viewed from above. The reflective layers are formed in a convex shape protruding toward the respective light-emitting layers, and when reflecting light irradiated from the light-emitting layers, diffuse and reflect the light. | 09-16-2010 |
20110221792 | LIQUID CRYSTAL DEVICE, METHOD OF DRIVING THE SAME, AND ELECTRONIC APPLIANCE - A liquid crystal device includes: a pixel for outputting a specified color light, which is provided with liquid crystals and an electrode for driving the liquid crystals and outputs light of the specified color; a pixel for controlling luminance and color purity, which outputs a control light for controlling the luminance and the color purity of the output light of the specified color; and a driving unit driving the pixel for outputting a specified color light, and the pixel for controlling luminance and color purity based on brightness information that indicates the brightness of an external environmental light. | 09-15-2011 |
20120229531 | DISPLAY AND LIGHTING DEVICE - Disclosed herein is a display including: a reflective image display section having pixels arranged in the display region; and a lighting device adapted to irradiate light to the image display section from diagonally in front, in which the light scattering characteristics in the display region are angle-dependent, and in which the lighting device irradiates light whose intensity distribution is adjusted so that when the display region displaying an image having an equal gray level is viewed from a given viewing position, the image luminance is uniform. | 09-13-2012 |
Patent application number | Description | Published |
20090120717 | SOUND ABSORBING STRUCTURE AND SOUND CHAMBER - A sound absorber is formed by covering the opening of a housing with a vibration member having a flat shape or a film shape so as to define an air layer therebetween. The sound absorber is attached to the wall of a room such that the vibration member is positioned opposite to the wall with a prescribed space therebetween. Sound generated in the room particularly in low frequencies enters into the space between the vibration member and the wall so as to cause vibration of the vibration member due to the pressure difference between the sound pressure applied to the space and the internal pressure of the air layer, thus consuming energy of sound waves. Thus, it is possible to efficiently absorb low-frequency sound with a reduced thickness of the air layer. | 05-14-2009 |
20090205901 | SOUND ABSORBING STRUCTURE AND VEHICLE COMPONENT HAVING SOUND ABSORBING PROPERTY - A sound absorbing structure is constituted of a housing having a hollow portion and an opening and a vibration member composed of a board or diaphragm. The vibration member is a square-shaped material having elasticity composed of a synthetic resin and is bonded to the opening of the housing, thus forming an air layer closed inside the sound absorbing structure by the housing and the vibration member. In the sound absorbing structure, when the lateral/longitudinal dimensions of the air layer and characteristics of the vibration member (e.g. a Young's modulus, thickness, and Poisson's ratio) are set such that the fundamental frequency of a vibration occurring in a bending system falls within 5% and 65% of the resonance frequency of a spring-mass system, a vibration mode having a large amplitude occurs in a frequency band lower than the resonance frequency of the spring-mass system, this improving the sound absorption coefficient. | 08-20-2009 |
20100044148 | SOUND ABSORBING STRUCTURE USING CLOSED-CELL POROUS MEDIUM - A sound absorbing structure is constituted of a housing, a vibration member composed of a closed-cell porous material whose airflow rate is less than 0.1 dm | 02-25-2010 |
20100089691 | SOUND ABSORBING STRUCTURE BUILT INTO LUGGAGE COMPARTMENT OF VEHICLE - A sound absorbing structure is constituted of a vibration plate and a rear air layer and is installed in a luggage compartment or trunk which is separated from a cabin in a vehicle. Sound waves entering into the luggage compartment drive the vibration plate to vibrate so that acoustic energy is converted into mechanical energy and is consumed by way of vibration of the vibration plate. By appropriately setting parameters and dimensions, the sound absorbing structure efficiently absorbs low-frequency sound such as road noise occurring due to friction of wheels of the vehicle traveling on a road. | 04-15-2010 |
20110056763 | ACOUSTIC RESONANCE DEVICE - An acoustic resonance device is installed in a compartment of a vehicle so as to reduce a low-frequency sound pressure (or noise) dependent upon a natural vibration. Specifically, an acoustic resonance device is a panel/diaphragm resonator, a resonance pipe, or a Helmholtz resonator, the inner space of which communicates with the compartment via an opening. The acoustic resonance device is positioned in proximity to an antinode of sound pressure owing to a natural vibration occurring in a driver/passenger space inside the compartment. Alternatively, the acoustic resonance device increases a particle velocity at a specific natural frequency or decreases sound pressure at an excitation frequency which occurs due to an external condition of the vehicle. The acoustic resonance device can be installed in a roof, a seat, a pillar supporting the roof, or a door of a vehicle. | 03-10-2011 |
20110127107 | ACOUSTIC RESONATOR AND SOUND CHAMBER - An acoustic resonator adaptable to a sound chamber is designed to decrease a sound pressure while increasing a particle velocity of medium particles in a low frequency range without increasing the overall size thereof. The acoustic resonator is constituted of a pipe member having one opening end and a resistance member embracing a high resistance region and a low resistance region. The resistance member is inserted into the pipe member such that one end thereof matches the opening end of the pipe member whilst the other end thereof is disposed at a predetermined position inside a hollow cavity of the pipe member. The high resistance region embraces an antinode region of the particle velocity distribution with respect to a standing wave occurred in the hollow cavity at a resonance frequency, thus causing an acoustic phenomenon decreasing the resonance frequency compared to a single unit of the pipe member. | 06-02-2011 |
20120097477 | STANDING WAVE ATTENUATION DEVICE - A standing wave attenuation device is installed in a cabin of a vehicle so as to reduce a standing wave caused by external noise such as road noise. The standing wave attenuation device provides a closed loop including a feedback comb filter with a feedback loop, a microphone, a speaker, and a delay element. The delay element adjusts the phase of the output signal of the feedback comb filter such that the time needed for one-time circulation of a signal through the feedback loop matches a half period of the standing wave. An original sound including the standing wave is picked up by the microphone and subjected to processing so that the speaker produces a sound wave with the inverse phase against the phase of a sound wave constituting the standing wave, so that the standing wave is canceled out by the sound wave emitted from the speaker. | 04-26-2012 |