Patent application number | Description | Published |
20130162939 | LIQUID CRYSTAL DISPLAY DEVICE - Columnar spacers are formed on a TFT substrate where a TFT circuit layer is formed. The TFT circuit layer has a TFT and a pixel electrode. A spacing between the TFT substrate and a counter substrate having a color filter, a black matrix, and an overcoat film is controlled by columnar spacers. The columnar spacers are inserted into an overcoat film formed on the counter substrate. Thus, the counter substrate and the TFT substrate are protruded inward. The substrates protruded inward are unlikely to be deformed. When an external pressure is applied or the front window or the like is bonded to the liquid crystal display panel with resin, the counter substrate is unlikely to be deformed by a stress applied by shrinkage on resin curing. Moreover, the number of columnar spacers can be properly set, thereby preventing the occurrence of low-temperature air bubbles. | 06-27-2013 |
20130249838 | TOUCH PANEL AND DISPLAY DEVICE MOUNTING THE SAME - There is provided a touch panel including: a substrate; plural X electrodes; and plural Y electrodes disposed so as to intersect with the plural X electrodes, wherein: the plural X electrodes and the plural Y electrodes have electrode parts and intersection parts; and a protective film is further provided on the plural X electrodes and the plural Y electrodes; and wherein the pencil hardness of the surface on the observer side of the protective film is 3 or higher to 7 or lower, more preferably, 4 or higher to 6 or lower. | 09-26-2013 |
20130284350 | MANUFACTURING METHOD OF LIQUID CRYSTAL DISPLAY DEVICE - An ultraviolet-curable resin is formed over a touch panel, and a liquid crystal display panel is bonded to the touch panel. Subsequently, an ultraviolet-curable resin is formed over the touch panel, and a front window is bonded to the touch panel. While the ultraviolet-curable resin is cured unevenly due to a black-frame print made around the periphery of the front window, the touch panel and the counter substrate of the liquid crystal display panel are already bonded together at this time. This prevents the uneven cure of the ultraviolet-curable resin from distorting the counter substrate alone. As a result, it is possible to avoid unevenness of the gap between the counter substrate and the TFT substrate of the liquid crystal display panel and the resulting yellowing around the periphery. | 10-31-2013 |
20130299082 | THREE DIMENSIONAL DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF - A liquid crystal parallax barrier panel and a liquid crystal display panel are held by vacuum-holding, and aligned so as to be laminated via an adhesive. After the lamination, the vacuum-holding is released. Then lamination of the liquid crystal display panel and the liquid crystal parallax barrier panel is finely adjusted, and the adhesive is temporarily cured by radiating ultraviolet rays. The adhesive is primarily cured and further thermally cured by ultraviolet rays to complete manufacturing of a three dimensional display device. Release of the vacuum-holding before temporary adhesion using ultraviolet rays allows suppression of deformation of a TFT substrate owing to the vacuum-holding as well as the gap unevenness and the color shading of the liquid crystal panel. | 11-14-2013 |
Patent application number | Description | Published |
20080212012 | Liquid Crystal Display Device and Manufacturing Method Thereof - To provide a liquid crystal display device in which a seal width at a cutting portion of substrates is small and defects caused at the time of cutting the substrates can be reduced. There is provided a liquid crystal display device including a liquid crystal display panel having: a first substrate; a second substrate; a sealing material through which the first substrate and the second substrate are stuck together; and a liquid crystal enclosed inside a liquid crystal enclosure area encircled by the first substrate, the second substrate, and the sealing material, wherein the sealing material includes a ring portion in a ring shape which configures the liquid crystal enclosure area and whose whole circumference is closed, and a first extension portion and a second extension portion, each of which is integrally connected to the ring portion and is arranged outside the ring portion, the first extension portion extends up to a cut-end portion of a first side of the liquid crystal display panel, the second extension portion extends up to a cut-end portion of a second side of the liquid crystal display panel, the second side being opposed to the first side, and in a state where the first substrate and the second substrate are stuck together, W | 09-04-2008 |
20090033858 | Liquid crystal display device and manufacturing method of the same - A manufacturing method is provided for a liquid crystal display device that can avoid any possible inconvenience as a result of a difficulty in controlling the dropping amount of a liquid crystal. For executing the method, the liquid crystal display device has a pair of substrates disposed in an opposed manner including a liquid crystal display area with a diagonal length in a range from 1 inch to 5 inches, and a plurality of column spacers is formed in the liquid crystal display area of at least one of the substrates. The method includes the steps of: forming a sealant, with a width in a range from 0.4 mm to 1.0 mm, around the liquid crystal display area of the substrate formed with the column spacers; dropping a liquid crystal into the area enclosed by the sealant on the substrate such that a surface of the liquid crystal has a height lower than a height of the column spacers; disposing the other substrate to be opposed to the substrate formed with the column spacers, and pushing the resulting pair of substrates in a direction bringing the substrates closer to each other; and curing the sealant in a state that the column spacers each have the height in a percentage range from 108% to 113% as a result of dividing the height without the pushing by the height with the pushing. | 02-05-2009 |
20090040452 | Manufacturing method of liquid crystal display device - The present disclosure relates to a manufacturing method of a liquid crystal display device. In one aspect, the method may include laminating two or more multipiece boards to each other by way of a sealing material, applying surface polishing to at least one of the multipiece boards using an etchant, and separating the multipiece boards into respective liquid crystal cells by cutting. In further aspects, the sealing material may include individual sealing materials which are formed on regions of the respective liquid crystal cells, an outer peripheral sealing material which surrounds the respective individual sealing materials and forms an opening at least in a portion thereof, and a weir sealing material of a pattern in which the weir sealing material is formed inside the outer peripheral sealing material and in the vicinity of the opening. | 02-12-2009 |
20090079706 | Display Device - In a display device having a touch panel, it is possible to prevent the generation of a screen defect caused by the intrusion of air bubbles into a UV curing resin formed between a touch panel and a display panel. The touch panel is constituted of an upper transparent-electrode-attached film and a lower transparent-electrode-attached film, and an air hole is formed in the lower transparent-electrode-attached film. Due to such constitution, in adhering the touch panel and the display panel to each other in a vacuum using a UV curing resin, air in the touch panel is also discharged and hence, there is no possibility that the touch panel swells. Accordingly, it is possible to prevent warping of the lower transparent-electrode-attached film and hence, in curing the UV curing resin for adhering the touch panel and the display panel to each other, it is possible to prevent the entanglement of air into the UV curing resin. Accordingly, a touch-panel attached display device free from a screen defect attributed to air bubbles can be manufactured. | 03-26-2009 |
20090215351 | Manufaturing method of display device - A method of manufacturing a display device in which a transparent substrate is bonded to a display panel by an adhesive, includes: applying the adhesive to the display panel or the transparent substrate in a predetermined pattern; bonding the display panel and the transparent substrate together by means of the adhesive after the applying step; and curing the adhesive after the bonding step, wherein in the applying step, a viscosity of the adhesive being more than 5000 mPa·s and 15000 mPa·s or less, the application of the adhesive is carried out by a screen printing, a time from a finishing point of the application of the adhesive in the applying step until a starting point of the bonding in the bonding step is 10 seconds or more and 120 seconds or less, in the bonding step, in a condition in which the adhesive applied in the applying step is spreading, with air bubbles remaining, and a maximum size of the air bubbles is 0.5 mm or less, the display panel and the transparent substrate are bonded together by the adhesive under a reduced pressure atmosphere lower than the atmospheric pressure, and in the curing step, after the maximum size of the air bubbles have reached 0.1 mm or less, ultraviolet light is applied, curing the adhesive. | 08-27-2009 |
20110043743 | Manufacturing method of liquid crystal display device and substrate for liquid crystal display device - A manufacturing method by which a plurality of liquid crystal cells are obtained from mother substrates includes a step of, before applying a sealing material, forming a columnar member disposed in a direction crossing a side of a second mother substrate, wherein the columnar member includes on one end side a first member disposed adjacent to an extended portion constituting a liquid crystal sealing inlet of the sealing material and at the other end a second member disposed to face at least the extended portion of the sealing material along the direction of the side, and the application of the sealing material is performed such that the extended portion of the sealing material rides on a part of the first member of the columnar member. | 02-24-2011 |
20110187960 | DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF - Disclosed is a display device in which reliable bonding strength and high reparability are compatible when a panel-like member is bonded to a display panel. | 08-04-2011 |
20110205472 | DISPLAY DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME - A liquid crystal display panel including liquid crystal sandwiched between a pair of substrates is prepared. A light-transmitting reinforcing plate is prepared. A photocuring resin is provided between the liquid crystal display panel and the reinforcing plate. Light is irradiated to a side surface of a laminated body constituted of the liquid crystal display panel, the reinforcing plate and the photocuring resin. The photocuring resin is arranged to face the liquid crystal in an opposed manner. The light is allowed to advance to the inside of the photocuring resin from an edge portion of the photocuring resin. The light is allowed to advance to the inside of the reinforcing plate from an edge portion of the reinforcing plate, is propagated in the inside of the reinforcing plate, and is irradiated to the photocuring resin from the reinforcing plate at a position away from the edge portion of the reinforcing plate. | 08-25-2011 |
20120090976 | MANUFACTURING METHOD OF TOUCH PANEL AND TOUCH PANEL - Disclosed is a manufacturing method of a touch panel, comprising the steps of: preparing a solution containing a silane coupling agent; applying the solution to a surface of a first substrate having a hydroxy group on the surface thereof: chemically bonding the silane coupling agent to the surface of the first substrate to form convex portions each having a silicon oxide backbone and an organic functional group in the structure thereof; and disposing a second substrate spaced apart from the first substrate to face the surface having the convex portions formed thereon of the first substrate. | 04-19-2012 |
20120098774 | IMAGE DISPLAY DEVICE - A liquid crystal display device having a liquid crystal panel LCP and a touch panel TP provided on the front surface of the liquid crystal panel is characterized in that wires connected to the liquid crystal panel and wires connected to the touch panel are included in one flexible printed circuit FPC, which is first connected (FOG | 04-26-2012 |
20120200796 | LIQUID CRYSTAL DISPLAY DEVICE - In a liquid crystal display device having a front window, light from a backlight is prevented from leaking through chamfered edges of the front window. An upper polarizing plate is formed on an opposing substrate and a light shielding material is formed abutting on an outer edge of the upper polarizing plate. Edges of the upper polarizing plate are located inward of edges of the front window. The upper polarizing plate and the front window are bonded with a boding material including an ultraviolet curable resin. The ultraviolet curable resin also lies over the light shielding material. Chamfers are formed in the front window and the ultraviolet curable resin does not adhere to the chamfers of the front window. By this structure, light from the backlight is prevented from entering the internal part of the front window through the chamfers of the front window and light leakage is prevented. | 08-09-2012 |
20120200805 | Liquid Crystal Display Device - Light emitted by a backlight can be prevented from leaking through a chamfered portion of a front window of a liquid crystal display device. | 08-09-2012 |
20130016311 | LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAMEAANM ISHII; AkiraAACI MobaraAACO JPAAGP ISHII; Akira Mobara JPAANM Kobayashi; SetsuoAACI MobaraAACO JPAAGP Kobayashi; Setsuo Mobara JPAANM Ishll; KatsuhikoAACI ChoseiAACO JPAAGP Ishll; Katsuhiko Chosei JPAANM Tanabe; ShinjiAACI MobaraAACO JPAAGP Tanabe; Shinji Mobara JPAANM Sento; KiyoshiAACI SakuraAACO JPAAGP Sento; Kiyoshi Sakura JP - Provided is a liquid crystal display device, including: a liquid crystal display panel; a plate-shaped component having a light permeable region, the plate-shaped component being disposed so as to face a display surface of the liquid crystal display panel; a pressure sensitive adhesive layer having light permeability, which is adhered under pressure onto the display surface of the liquid crystal display panel; and an adhesive layer having light permeability, which is adhered onto a surface of the plate-shaped component facing the display surface, in which the plate-shaped component is mounted on the liquid crystal display panel through intermediation of the pressure sensitive adhesive layer and the adhesive layer. | 01-17-2013 |
20130061877 | CLEANING METHOD - The present invention relates to a cleaning method using dry ice pellets that make it possible to efficiently peel off a UV resin. The cleaning method according to the present invention is a method for cleaning a surface of an object to be cleaned that is fixed to a fixture by blowing dry ice pellets against the above-described object using dry air. The dry air has a dew point of −60° C. to −80° C. A nozzle for jetting the dry air and the dry ice pellets against the surface of the object is provided, and the distance between the nozzle and the surface of the object is 5 mm to 70 mm. The shape of the nozzle in a cross-section is circular, elliptical or rectangular. | 03-14-2013 |
20130077013 | LIQUID CRYSTAL DISPLAY DEVICE AND LIQUID CRYSTAL LENS - In a liquid crystal display device enabling three-dimensional display using a liquid crystal lens, both mechanical strength and a liquid crystal lens effect are satisfied. The liquid crystal lens is bonded onto an upper polarizing plate of a liquid crystal display panel with a bonding material. The liquid crystal lens includes an upper substrate, a lower substrate and a liquid crystal layer sandwiched therebetween. The upper substrate of liquid crystal lens has a thickness larger than a total of the thickness of the lower substrate of the liquid crystal lens and the thickness of the liquid crystal display panel. Thereby, it is possible to realize a liquid crystal display device satisfying both the mechanical strength and liquid crystal lens effect. | 03-28-2013 |
20130083272 | Liquid Crystal Display Device - In a liquid crystal display device, there is provided a liquid crystal display panel in which a TFT substrate and a counter substrate are bonded together by a sealing material, with a liquid crystal sandwiched between the substrates. Further, a front window with a black border print formed in the periphery is bonded to the liquid crystal display panel by a UV curable resin. The liquid crystal, is filled by a drop method. The thickness of the TFT substrate and the counter substrate is reduced to about 0.2 mm toy polishing. An inner end of the black border print of the front window is inside an inner end or the sealing material, to prevent the counter substrate of the liquid crystal display panel from being deformed by stress generated In the curing of the UV curable resin, thereby preventing yellow discoloration in the periphery of the display area. | 04-04-2013 |
20150212370 | LIQUID CRYSTAL DISPLAY DEVICE - Light emitted by a backlight can be prevented from leaking through a chamfered portion of a front window of a liquid crystal display device. An upper polarizing plate is bonded over the counter substrate, and a front window is bonded over the upper polarizing plate with a UV-curable resin adhesive. The front window is chamfered and a light shielding member is formed on the chamfered portion. The UV adhesive exists between the chamfered portion and the surface of the upper polarizing plate or the counter substrate, and an outer end of the polarizing plate exists at a point outer than an outer end of the front window. Since the light shielding member for the chamfered portion is formed, light from the backlight does not penetrate from the chamfered portion. Thus, light leakage at a periphery of a screen can be prevented even when the view angle is large. | 07-30-2015 |
Patent application number | Description | Published |
20110070006 | TEMPERATURE EQUALIZING ROLLER AND FIXING DEVICE - A temperature equalizing roller includes a metal pipe, a heat pipe that is located inside the metal pipe and has a thermal expansion coefficient higher than that of the metal pipe, and a joining layer. The joining layer lies between an outer peripheral surface of the heat pipe and an inner peripheral surface of the metal pipe, joins the outer peripheral surface of the heat pipe and the inner peripheral surface of the metal pipe, and has a higher thermal conductivity than a thermal conductivity of air. | 03-24-2011 |
20110076043 | FIXING DEVICE - A fixing device includes a belt that has an endless shape, a roller that forms a nip with the belt, a support member that supports the belt interposed between the support member and the roller, a coil that generates a magnetic field for inducing current in the belt, an auxiliary heat generation member that generates heat with the current induced by the magnetic field in the loop of the belt, and a temperature sensor that is opposed to the auxiliary heat generation member with the belt interposed between the element and the auxiliary heat generation member and detects the temperature of an outer peripheral surface of the belt. | 03-31-2011 |
20110142462 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes a characteristic acquiring unit configured to acquire a characteristic of the medium, a fixing device including a heating member configured to heat the front surface of the medium and a pressing member configured to heat a rear surface of the medium, and a control unit configured to turn off, when the thickness or the basis weight of the medium is determined to be equal to or smaller than a predetermined value based on an acquired characteristic of the medium, heating power for the pressing member at start of a fixing operation by the fixing device and control the temperature of the pressing member during the fixing operation to the temperature between a second threshold temperature which is temperature lower than a temperature during standby of the fixing operation, and a first threshold temperature lower than the second threshold temperature. | 06-16-2011 |
20110142474 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes an image forming unit configured to form a toner image on a first surface of a medium, a fixing unit configured to have a heating member which heats the first surface of the medium, and a pressurizing member which is pressed in contact with the heating member via the medium to heat a second surface of the medium, and a supply unit configured to supply a used medium to the image forming unit, a control unit configured to, when the used medium is supplied from the supply unit, control a fixing setting temperature of the pressurizing member to a temperature equal to or lower than a temperature for fixing on the unused medium, and control a fixing temperature of the heating member to a temperature equal to or higher than a temperature for fixing on the unused medium. | 06-16-2011 |
20110311253 | IMAGE FORMING APPARATUS AND IMAGE FORMATION PROCESSING METHOD - An image forming apparatus with no staining or deterioration of images can be provided. The image forming apparatus includes: an image holding body that transfers toner onto a sheet; a transfer voltage applying unit that applies a transfer voltage for transferring the toner onto the sheet from the image holding body; a fixing unit that includes a heating rotation body which heats the toner on the sheet to fix the toner onto the sheet, and a pressurizing body which forms a nip portion with the heating rotation body and nips and transports the sheet by cooperating with the heating rotation body; a sensor unit that is at a position on an upstream side of the fixing unit in a sheet transport direction and detects an electrical resistance value of the sheet; and a voltage applying unit that applies a predetermined voltage value having the opposite polarity to that of a voltage applied by the transfer voltage applying unit to a reverse surface to a toner transfer surface of the sheet, to the pressurizing body, on the basis of the electrical resistance value of the sheet detected by the sensor unit. | 12-22-2011 |
20110311257 | IMAGE FORMING APPARATUS, CONTROL METHOD, AND RECORDING MEDIUM - An embodiment provides an image forming apparatus including: a job acquiring unit that acquires an image forming job that gives instructions for performing forming of an image; an image forming process control unit that controls performance of the image forming job that the job acquiring unit acquires; a temperature information acquiring unit that acquires information showing temperature of the heating rotary body; a determining unit that determines whether the temperature of the heating rotary body which is acquired by the temperature information acquiring unit is equal to or higher than a predetermined stand-by temperature set as a temperature in a stand-by state that stands by to perform the image forming process, when the image forming process is completed, based on the image forming job by the image forming process control unit; and a fixing device control unit, which controls the fixing device, performs a first stand-by control process that increases the temperature of the heating rotary body to the stand-by temperature by heating the heating rotary body with the heating member while rotating the heating rotary body with the heating rotary body and the pressing body in contact, when the determining unit determines that the temperature of the heating rotary body is lower than the stand-by temperature. Further, the fixing device control unit stops the rotation of the heating rotary body and performs a second stand-by control process that makes the fixing device stand by, without heating the heating rotary body with the heating member, when the determining unit determines that the temperature of the heating rotary body is the stand-by temperature or higher. | 12-22-2011 |
20120328308 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND FIXING APPARATUS - According to one embodiment, an image forming apparatus includes an image forming section configured to form a toner image on a medium, a fixing device including a heating member configured to heat the medium and a pressurizing member configured to come into contact with the heating member via the medium and heat the medium, and a control section configured to stop, if the temperatures of the heating member and the pressurizing member deviate from a predetermined temperature range, the image forming operation, separate the heating member and the pressurizing member, and control the respective temperatures within the predetermined temperature range. | 12-27-2012 |
20140213444 | ERASING APPARATUS - An erasing apparatus includes a conveyance path configured to convey a sheet on which an image is formed with a coloring agent which is erased by heating. A first erasing unit is disposed on the conveyance path and is configured to heat the sheet when the sheet is conveyed between a first heating component and a first press component. A second erasing unit is disposed on the conveyance path downstream from the first erasing unit and is configured to heat the sheet when the sheet is conveyed between a second heating component and a second press component. A control section is configured to control a temperature of the first heating component at a first temperature at which the image on the sheet can be erased and to control a temperature of the second heating component at a second temperature lower than the first temperature. | 07-31-2014 |
Patent application number | Description | Published |
20080310036 | OPTICAL ELEMENT HOLDING STRUCTURE, EXPOSURE APPARATUS, AND DEVICE MANUFACTURING METHOD - An optical element holding structure comprises a first holding member holding an optical element, a second holding member holding the first holding member, a third holding member holding the second holding member, first elastic members positioned between the first and second holding members and can elastically deform in the radial direction and second elastic members positioned between the second and third holding members in a radial direction thereof and can elastically deform in the radial direction, the plurality of first elastic members and the plurality of second elastic members are arranged in a circumferential direction about an optical axis of the optical element as the center, and a phase of the plurality of first elastic members is shifted from a phase of the plurality of second elastic members in the circumferential direction about the optical axis of the optical element as the center. | 12-18-2008 |
20120086149 | IMPRINT APPARATUS AND ARTICLE MANUFACTURING METHOD - The imprint apparatus of the present invention molds an imprint material on a substrate using a mold and cures the imprint material to form a pattern on the substrate. The apparatus includes a holder configured to attract the mold to hold the mold; and a pressure reduction device configured to reduce a back pressure of the mold held by the holder, wherein the apparatus is configured to reduce the back pressure by the pressure reduction device in parallel with release of the mold from the imprint material. | 04-12-2012 |
20130056904 | IMPRINT APPARATUS AND ARTICLE MANUFACTURING METHOD USING SAME - An imprint apparatus includes a deforming unit configured to deform the mold held by the mold holding unit into a convex shape toward the substrate; a driving unit configured to change an attitude of the mold or the substrate during a pressing in which the mold deformed is pressed against the uncured resin to thereby make a position of a contact region at which the mold is brought into contact with the uncured resin movable; a control unit configured to calculate a plane coordinates of a centroid of the contact region based on an image information of the contact region acquired by a measuring unit and to control an operation of the driving unit such that the plane coordinates position of the centroid is directed toward the plane coordinates position of the centroid of a pattern-forming region on the substrate, which has been calculated or has been acquired in advance. | 03-07-2013 |
20130056905 | IMPRINT APPARATUS AND ARTICLE MANUFACTURING METHOD USING SAME - An imprint apparatus molds an uncured resin on a substrate and cures the resin to form a pattern of the cured resin on the substrate. The apparatus includes a mold holding unit that holds the mold, a substrate holding unit that holds the substrate, a deforming unit that deforms the mold held by the mold holding unit into a convex shape toward the substrate, a driving unit that changes an attitude of the mold or the substrate during a releasing operation in which the mold deformed into the convex shape is released from the resin to thereby make the position of a contact region at which the mold is brought into contact with the resin movable, a measuring unit that acquires image information indicating a state of the contact region, and a control unit configured to control the operation of the driving unit based on the image information. | 03-07-2013 |
20150123300 | METHOD FOR DETERMINING PATTERN OF MOLD FOR IMPRINT, IMPRINT METHOD, AND APPARATUS - A determination method for determining a pattern of a mold is disclosed. The pattern of the mold is used in imprint processing of forming a pattern on imprint material by performing the steps of pressing the imprint material on a substrate against the pattern of the mold in an atmosphere containing condensable gas to be liquefied due to compression, curing the imprint material, and releasing the mold from the imprint material. A processor calculates a shrinkage amount of the pattern on the imprint material. The pattern on the imprint material shrinks by desorbing condensate liquid, which is produced through liquefaction of the condensable gas between the imprint material and the pattern of the mold in the pressing step and which is dissolved in the imprint material, from the imprint material after completion of the pressing step. | 05-07-2015 |
Patent application number | Description | Published |
20120293228 | LEVEL CONTROL CIRCUIT, LEVEL CONTROL METHOD, AND LEVEL CONTROL SYSTEM - A level control circuit that generates output signal for level control includes: a control information storage that stores control information corresponding to a signal level, a control information circuit that outputs the output signal for level control corresponding to the signal level of a first input signal based on the control information stored in the control information storage; and an information update circuit that updates the control information of the control information storage according to the signal level of a second input signal. | 11-22-2012 |
20140078579 | OPTICAL OUTPUT LEVEL CONTROL APPARATUS - An optical output level control apparatus includes a detector configured to detect power of an input optical signal; an amplifier configured to amplify the input optical signal; a memory configured to store data that define a first curved line representing a relationship between the input power and a drive voltage of the amplifier for obtaining a first output level and data that defines a second curved line representing a relationship between the input power and the drive voltage of the amplifier for obtaining a second output level; a generator configured to correct at least one of the first and second curved lines and generate a target curved line representing a relationship between input power and a drive voltage of the amplifier for obtaining a target output level through interpolation based on the first and second curved lines at least one of which is corrected. | 03-20-2014 |
20140139909 | OPTICAL AMPLIFICATION DEVICE AND OPTICAL AMPLIFICATION METHOD - An optical amplification device includes: a plurality of semiconductor optical amplifiers to which an optical burst signal is input at a different timing; an optical coupler that combines output signals output from the plurality of semiconductor optical amplifiers; a detection unit that detects an optical inputting to the plurality of semiconductor optical amplifiers; and a control unit that activates one of the semiconductor optical amplifiers where the optical inputting is detected, inactivates the other semiconductor optical amplifier, and remains the activation until another optical inputting is detected in the other semiconductor optical amplifier. | 05-22-2014 |
20150117871 | OPTICAL LEVEL CONTROL APPARATUS AND OPTICAL RECEPTION APPARATUS - An optical level control apparatus includes an input port, an output port, an optical device to assume a state of outputting light inputted to the input port from the output port and a state of not outputting the light inputted to the input port from the output port; a detector to detect an intensity of the light inputted to the input port, and a control unit to detect an input of an optical burst signal to the input port on the basis of a result of detecting the intensity of the light and to control the optical device so that the signal, in which to eliminate a field extending up to an elapse of a period of first time equal to or shorter than laser ON time period of the signal from a head of the signal with its input being detected, is output from the output port. | 04-30-2015 |
20150280398 | OPTICAL AMPLIFICATION DEVICE AND OPTICAL AMPLIFICATION METHOD - An optical amplification device includes: a port group that has a plurality of ports that have a semiconductor optical amplifier and a port that does not have a semiconductor optical amplifier, an optical burst signal being input into each of the ports at a different timing; and a control unit, wherein: when an optical inputting into the port that has the semiconductor optical amplifier is detected, the control unit activates the semiconductor optical amplifier of the port where the optical inputting is detected, inactivates the other semiconductor optical amplifier and remains an activation until another optical inputting is detected in another semiconductor optical amplifier; and when an optical inputting into the port that does not have the semiconductor optical amplifier is detected, the control unit inactivates the semiconductor optical amplifiers of the plurality of the ports that have the semiconductor optical amplifier. | 10-01-2015 |