Patent application number | Description | Published |
20090245891 | ROLLING APPARATUS, DEVELOPMENT ROLLER AND METHOD FOR MANUFACTURING THE SAME, DEVELOPMENT DEVICE, AND IMAGE FORMING APPARATUS - An apparatus includes: a rolling die having protruding threads and a feeding unit moving the workpiece by L | 10-01-2009 |
20100098464 | TONER CARRYING ROLLER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS - A toner carrying roller in which a plurality of concave parts are arranged on a surface of a roller base member having a cylindrical shape, includes: an abrasion protection layer formed on the surface of the roller base member; and a charging layer formed on a surface of the abrasion protection layer, the abrasion protection layer being formed in the plurality of concave parts, and mainly made of one of NiP and NiBW. | 04-22-2010 |
20110085147 | LIGHT SOURCE DEVICE AND PROJECTION DISPLAY DEVICE - A light source device includes: a microwave generating section generating microwaves; a central conductor connected to the microwave generating section and emitting the microwaves; a discharge lamp connected to the central conductor and emitting light by the microwaves; and a reflector surrounding the discharge lamp, the reflector which has an opening at one end thereof and is formed of conductor material, wherein the relationship between a wavelength λ of the microwaves, an inside surface length D which is an inside diameter of the opening of the reflector or a maximum length of a cross-sectional shape of the opening of the reflector, and a length L from a first end of the discharge lamp opposite to a second end connected to the central conductor to the opening of the reflector is D≦λ/2 and L/D≧0.8. | 04-14-2011 |
20110204809 | LIGHT SOURCE DEVICE AND PROJECTION TYPE DISPLAY APPARATUS - A light source device includes: a microwave power source which generates microwaves; a central conductor which radiates the microwaves; and a light emitter which emits light by receiving the microwaves, wherein the central conductor and the light emitter are spaced from each other. | 08-25-2011 |
Patent application number | Description | Published |
20090208255 | Development Roller, Development Device, and Image Forming Apparatus - A development roller includes a base unit having a base recess and a base projection formed in a predetermined area of a circumference surface of the base unit, and a surface layer formed on the circumference surface of the base unit and having a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. | 08-20-2009 |
20090208256 | Development Roller, Development Device, and Image Forming Apparatus - A development roller includes a base unit having a base recess and a base projection that are formed in a predetermined area of a circumference surface of the base unit by pressing a regular pattern in pressure machining, and a surface layer formed on the circumference surface of the base unit and having a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. A thickness of the surface layer is larger than a maximum height of a base swollen portion close to the side edge of the base projection from a regular surface of the base projection. | 08-20-2009 |
20090214271 | Development Roller, Development Device, Image Forming Apparatus, and Method of Manufacturing Development Roller - A development roller includes a base unit having a base recess and a base projection that are formed in a predetermined area of a circumference surface of the base unit, and a surface layer formed on the circumference surface of the base unit and having on the circumference thereof a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. Surface hardness of the projection is higher than surface hardness of the recess. | 08-27-2009 |
20100214542 | LIGHT SOURCE DEVICE, AND PROJECTOR - A light source device includes an elliptical resonator, an electric discharge lamp that has an electric discharge tube and an electrode connected to the electric discharge tube and is disposed at one of two confocal points of the elliptical resonator, and a power supply antenna that supplies a microwave to the electric discharge lamp and is disposed at the other confocal point. | 08-26-2010 |
20120319599 | LIGHT SOURCE APPARATUS, DISCHARGE LAMP DRIVING METHOD, AND PROJECTOR - A light source apparatus includes a discharge lamp including a light-emitting container, and a pair of electrodes disposed such that a respective tip portion thereof opposes each other in the light-emitting container, and a driving unit that supplies a driving current to the pair of electrodes. The driving unit includes an AC supplier that supplies an alternating current of a frequency not lower than 1 kHz and not higher than 10 GHz to the pair of electrodes and a DC supplier that supplies a direct current to the pair of electrodes. The AC supplier is configured so as to alternately repeat an AC supply section in which the alternating current is supplied and an AC stop section in which the supply of the alternating current is stopped, and the DC supplier is configured so as to supply the direct current during a period corresponding to the AC stop section. | 12-20-2012 |
20130027674 | LIGHT SOURCE APPARATUS, DISCHARGE LAMP DRIVING METHOD, AND PROJECTOR - A light source apparatus includes a discharge lamp including a light-emitting container having a cavity in which a discharge medium is enclosed, and a pair of electrodes disposed such that respective tip portions thereof oppose each other in the cavity, and a driving unit that supplies a driving current to the pair of electrodes. The driving current is generated by modulating amplitude of alternating current having a frequency not lower than 1 kHz and not higher than 10 GHz, such that a first section and a second section in which the amplitude is smaller than in the first section are alternately repeated. | 01-31-2013 |
20130038844 | LIGHT SOURCE DEVICE, METHOD OF DRIVING DISCHARGE LAMP, AND PROJECTOR - A light source device including a discharge lamp that has a first electrode and a second electrode opposed to each other in a hollow portion in which a discharge medium is enclosed; and a driving device that supplies a driving voltage to the first electrode and the second electrode, wherein the driving voltage is applied to the discharge medium through the first electrode and the second electrode such that the discharge medium emits light, wherein the driving device changes a relative potential of the first electrode with respect to the second electrode at a plurality of frequencies. | 02-14-2013 |
20130050661 | LIGHT SOURCE DEVICE, METHOD OF DRIVING DISCHARGE LAMP, AND PROJECTOR - A light source device includes a discharge lamp that has a first electrode and a second electrode opposed to each other in a hollow portion in which a discharge medium is enclosed and a driving device that supplies a driving voltage to the first electrode and the second electrode. The driving voltage is applied to the discharge medium through the first electrode and the second electrode such that the discharge medium emits light. | 02-28-2013 |
20130050662 | LIGHT SOURCE DEVICE, METHOD OF DRIVING DISCHARGE LAMP, AND PROJECTOR - A light source device includes a discharge lamp, and a discharge lamp driving device that supplies a driving current to a pair of electrodes. The discharge lamp driving device includes an alternating current supply unit that supplies an alternating current with a frequency equal to or higher than 1 kHz and equal to or lower than 10 GHz to the electrodes, and a direct current supply unit that supplies a direct current to the electrodes. | 02-28-2013 |
20130207568 | LIGHT SOURCE DEVICE, PROJECTOR, AND METHOD OF DRIVING DISCHARGE LAMP - A light source device includes a discharge lamp having a light emitting case and a pair of electrodes, a drive device, a voltage detector, and a time measurement device, the drive device alternately repeats a first alternating current supply interval and a second alternating current supply interval, measures a period of the first and the second alternating current supply interval with the time measurement device, performs a change from the first alternating current supply interval to the second alternating current supply interval when the period of the first alternating current supply interval reaches a predetermined period A, and performs a change from the second alternating current supply interval to the first alternating current supply interval when the period of the second alternating current supply interval reaches a predetermined period B, or when an absolute value of an inter-electrode voltage of the pair of electrodes reaches a threshold value. | 08-15-2013 |
20140063471 | DRIVING DEVICE AND DRIVING METHOD FOR DISCHARGE LAMP, LIGHT SOURCE DEVICE, AND PROJECTOR - A light source device includes a discharge lamp including a pair of electrodes arranged to be opposed to each other in a hollow section in which a discharge medium is encapsulated and a driving device. The driving device includes a supplying unit configured to supply an alternating current having a frequency higher than 1 kHz to the pair of electrodes in a high-frequency period and a control unit configured to set at least a first frequency higher than 1 kHz and a second frequency higher than 1 kHz and different from the first frequency as the frequency of the alternating current, switch an alternating current having the first frequency and an alternating current having the second frequency in the high-frequency period, and control the supplying unit to repeat the high-frequency period to supply an alternating current to the pair of electrodes. | 03-06-2014 |
20140218696 | LIGHT SOURCE DRIVE DEVICE, DISPLAY APPARATUS, AND LIGHT SOURCE DRIVE METHOD - A light source drive device includes a supply unit that supplies a high-frequency first drive signal and a second drive signal whose frequency is lower than a frequency of the first drive signal to a discharge lamp which has a pair of electrodes, and a control unit that controls the supply unit so that the second drive signal is supplied during a second period after the first drive signal is supplied during a first period and the second period is lengthened as a voltage between the pair of electrodes is increased. It is preferable that the second period be longer than two minutes. | 08-07-2014 |
20140218697 | LIGHT SOURCE DRIVE DEVICE, DISPLAY APPARATUS, AND LIGHT SOURCE DRIVE METHOD - A light source drive device includes a supply unit that supplies a high-frequency first drive signal and a second drive signal whose frequency is lower than a frequency of the first drive signal to a discharge lamp which has a pair of electrodes, and a control unit that controls the supply unit so that the first drive signal and the second drive signal of fixed durations are alternately supplied and that controls the supply unit so that the first drive signal is supplied in a case where a voltage between the pair of electrodes is below a threshold. | 08-07-2014 |
20140354961 | DISCHARGE LAMP DRIVER, LIGHT SOURCE, PROJECTOR, AND METHOD OF DRIVING DISCHARGE LAMP - A discharge lamp driver includes a discharge lamp drive unit that supplies a drive current to the discharge lamp, and a control unit that controls the discharge lamp drive unit according to a drive current waveform, wherein the drive current waveform has a mixed frequency drive period including a unit drive period containing a first drive period in which a first drive current is supplied to the discharge lamp and a second drive period provided immediately after the first drive period, in which a second drive current is supplied to the discharge lamp, the first drive current is a half-period alternating current having a frequency higher than 10 Hz and not higher than 300 Hz, the second drive current is an alternating current having a frequency higher than 1000 Hz, and a length of the second drive period is equal to or longer than a length of the first drive period. | 12-04-2014 |
20140375965 | LIGHT SOURCE, PROJECTOR, AND METHOD OF COOLING DISCHARGE LAMP - A light source includes a discharge lamp that outputs light, a discharge lamp driver that supplies drive power to the discharge lamp, a cooling unit that cools the discharge lamp, and a control unit that controls the cooling unit, and the control unit controls the cooling unit based on control information representing a relationship a rotation speed of the cooling unit between at least one of temperature information of the discharge lamp and a voltage between electrodes of the discharge lamp. | 12-25-2014 |
Patent application number | Description | Published |
20090050813 | RADIATION DETECTOR - In a radiation detector according to this invention, a portion of a semiconductor, located in a connection of a common electrode to a lead wire, is dented in a recess form from other portions of a semiconductor, in a range short of a radiation detection effective area. An insulating seat is disposed to fill the portion located in the connection. The common electrode is formed to cover at least part of the seat. The lead wire is connected to a portion of the incidence surface of the common electrode located on the seat. Thus, the detector can avoid performance degradation resulting from connection of the lead wire to the common electrode, and avoid problems of heat deformation stress and radiation attenuation. | 02-26-2009 |
20110163306 | RADIATION DETECTOR - A radiation detector of this invention has a curable synthetic resin film covering exposed surfaces of a radiation sensitive semiconductor layer, a carrier selective high resistance film and a common electrode, in which a material allowing no chloride to mix in is used in a manufacturing process of the curable synthetic resin film. This prevents pinholes and voids from being formed by chlorine ions in the carrier selective high resistance film and semiconductor layer. Also a protective film which does not transmit ionic materials may be provided between the exposed surface of the common electrode and the curable synthetic resin film, thereby to prevent the carrier selective high resistance film from being corroded by chlorine ions included in the curable synthetic resin film, and to prevent an increase of dark current flowing through the semiconductor layer. | 07-07-2011 |
20120043633 | RADIATION DETECTOR - According to a radiation detector of this invention, a common electrode for bias voltage application and a lead wire for bias voltage supply are connected through a conductive plate as a planarly formed plate interposed therebetween. Since the conductive plate is connected instead of connecting the lead wire directly onto the common electrode, it can prevent damage to a radiation sensitive semiconductor and avoid performance degradation. Since the conductive plate is formed planarly, even if a conductive paste with high resistance is used, connection resistance can be lowered to be comparable to the use of silver paste. That is, the range of selection of the conductive paste is broadened. Also, connection can be made without using an insulating seat and performance degradation can be avoided. As a result, performance degradation can be avoided, without using an insulating seat. | 02-23-2012 |
Patent application number | Description | Published |
20130231845 | AIR-FUEL RATIO CONTROL APPARATUS - An air-fuel ratio control apparatus of the present invention comprises an inverse direction spike introducing section and an inverse direction spike interval setting section. The inverse direction spike introducing section introduces, while an air-fuel ratio correction required by an output of a downstream air-fuel ratio sensor is being carried out, an inverse direction spike which is an air-fuel ratio spike to temporarily change an air-fuel ratio of an exhaust gas toward a direction opposite to a direction of the air-fuel ratio correction with respect to a target control air-fuel ratio. The inverse direction spike interval setting section sets, based on an operating state of an internal combustion engine system, an inverse direction spike interval which is an interval between two of the inverse direction spikes next to each other in time. | 09-05-2013 |
20130269324 | AIR-FUEL RATIO CONTROL APPARATUS - An air-fuel ratio control apparatus of the present invention includes a determination section and a reverse direction correction introducing section. The determination section determines whether or not an output of the downstream air-fuel ratio sensor falls within a predetermined range whose center corresponds to a target value corresponding to the stoichiometric air-fuel ratio. When the output of the downstream air-fuel ratio sensor falls within the predetermined range, the reverse direction correction introducing section temporarily introduces, to an air-fuel ratio correction in a direction requested by the output, an air-fuel ratio correction in a direction opposite to the requested direction. | 10-17-2013 |
20130333358 | CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine determines, based on an output value of the downstream air-fuel ratio sensor, an air-fuel ratio of a gas flowing into the catalyst that is set to either a “target rich ratio” or a “target lean ratio”, and determines a fuel injection amount. Disclosed is an evaporated fuel purge section for introducing an evaporated fuel generated in a fuel tank into an intake passage. The purge section starts the purge when the target air-fuel ratio is set to the target rich ratio at a purge execution condition satisfied time point at which a state has changed from a state in which the purge execution condition is unsatisfied to a state in which it is satisfied, and does not start the purge when the target air-fuel ratio is set to the target lean air-fuel ratio at the purge execution condition satisfied time point. | 12-19-2013 |
20130338904 | AIR-FUEL RATIO CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - An air-fuel ratio control apparatus for an internal combustion engine of the present invention determines whether or not a lean request has occurred, based on a comparison between a value correlating with an output value of the downstream air-fuel ratio sensor disposed downstream of the catalyst (downstream air-fuel ratio sensor output correlating value) and a predetermined lean request determining value, and determines whether or not a rich request has occurred, based on a comparison between the downstream air-fuel ratio sensor output correlating value and a predetermined rich request determining value. Further, the air-fuel ratio control apparatus calculates a total amount of oxygen (released oxygen amount) released from the catalyst in the rich request occurring period, and calculates an integrated value (present stored oxygen amount) of oxygen stored in the catalyst after a start of the lean request occurring period which follows the rich request occurring period. The apparatus changes the rich request determining value in such a manner that a point in time at which it is determined that the rich request has occurred comes much earlier as the present stored oxygen amount comes closer to the released oxygen amount. | 12-19-2013 |
20140283504 | AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An air-fuel ratio control apparatus for an internal combustion engine according to an embodiment of the invention (the present control apparatus) sets a target air-fuel ratio to a target rich air-fuel ratio when it is determined on the basis of the output value Voxs of a downstream air-fuel ratio sensor | 09-25-2014 |
Patent application number | Description | Published |
20150103322 | DISCHARGE LAMP DRIVING DEVICE, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD - A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp; and a control unit which controls the discharge lamp driving unit according to a waveform of the drive power. The waveform has n launching periods and a low-power mode lighting period. The n launching periods include a first launching period in which the drive power increases toward refresh power that is equal to or above drive power in a low-power mode and equal to or below rated power, and (n−1) launching periods in which the drive power is maintained at the refresh power. The control unit, in an x-th launching period, supplies the discharge lamp with a drive current having a drive frequency equal to or below a drive frequency of a drive current supplied to the discharge lamp in an (x−1)th launching period. | 04-16-2015 |
20150103323 | DISCHARGE LAMP DRIVING DEVICE, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD - A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp; and a control unit which controls the discharge lamp driving unit. The control unit is configured to execute a first driving in which first drive power is supplied to the discharge lamp and a second driving in which second drive power that is equal to or higher than the first drive power and equal to or lower than rated power of the discharge lamp is supplied to the discharge lamp. The control unit executes the second driving in a launching period of the discharge lamp, and adjusts a heat load applied to the discharge lamp in the second driving executed in the launching period, according to a degree of deterioration of the discharge lamp. | 04-16-2015 |
20150103324 | DISCHARGE LAMP DRIVING DEVICE, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD - A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp having electrodes; a storage unit which stores information with respect to the discharge lamp; and a control unit which controls the discharge lamp driving unit, wherein the control unit is configured to execute a stationary lighting driving in which first drive power is supplied to the discharge lamp and a high-power driving in which second drive power that is higher than the first drive power is supplied to the discharge lamp, and the control unit sets first execution information of the high-power driving on the basis of first information with respect to the high-power driving stored in the storage unit, at a predetermining setting timing, and controls the discharge lamp driving unit according to the first execution information. | 04-16-2015 |