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1. 发明专利

JP2003110189A SEMICONDUCTOR LASER CONTROLLER 审中-公开
公开(公告)号：JP2003110189A
公开(公告)日：2003-04-11
申请号：JP2001305303
申请日：2001-10-01
申请人： RICOH KK
发明人： OMORI JUNJI , ISHIDA MASAAKI
IPC分类号： B41J2/44 , G03G15/04 , G03G15/043 , H01S5/0683
摘要： PROBLEM TO BE SOLVED: To provide a structure capable of preventing the formation of an electrostatic latent image due to offset light emission in an non-image area and substrate contamination due to the attachment of toner, in an image forming apparatus. SOLUTION: A means 34 is provided which sets an offset level control signal for determining an offset current at the time of offset light emission of a semiconductor laser PD to a desired value according to the characteristics, types, individual differences or the like of a semiconductor laser.

2. 发明专利

JP2001147498A IMAGE READER 失效
公开(公告)号：JP2001147498A
公开(公告)日：2001-05-29
申请号：JP32870799
申请日：1999-11-18
申请人： RICOH KK
发明人： OMORI JUNJI
IPC分类号： H04N1/00 , G03B27/62 , G06T1/00 , H04N1/04
摘要： PROBLEM TO BE SOLVED: To provide an image reader which is constituted so that the paper size of an original on an original platen may be detected by an original detecting sensor, and only the corresponding area to the size of the paper on a liquid crystal layer arranged on the original platen may be made in a light transmissible state and scanning light leaking outside the original area may be blocked. SOLUTION: A transparent glass plate 105 and the liquid crystal layer 106 are formed on the original platen 101 with a layer structure, and as for the liquid crystal layer 106, the driving area is divided into areas 1 to 13 capable of making the following regular paper sizes; vertical A3, vertical B4, vertical A4, vertical B5, horizontal A4, horizontal B5 and horizontal A5 in the light transmissible state. The paper size of the original 104 set on the original platen 101 is detected by the original size detecting sensor 103, then, among the areas 1 to 13 on the liquid crystal layer 106, the corresponding area to the detected paper size is made in the light transmissible state, and the areas 1 to 13 beyond the extent of the corresponding area are made in non light-transmissible state, thereafter, the image of the original 104 is read by the scanner 102.

3. 发明专利

JP2003211723A METHOD FOR GENERATING PIXEL CLOCK, PIXEL CLOCK GENERATOR, OPTICAL WRITING UNIT AND IMAGING APPARATUS 审中-公开
公开(公告)号：JP2003211723A
公开(公告)日：2003-07-29
申请号：JP2002011618
申请日：2002-01-21
申请人： RICOH KK
发明人： OMORI JUNJI , ISHIDA MASAAKI , NIHEI YASUHIRO
IPC分类号： B41J2/44 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain a high quality image by correcting positional shift of main scanning dot with high accuracy and suppressing generation of a longitudinal streak image due to phase correction of a pixel clock. SOLUTION: Only for a specified pixel clock in a data region constituted of a plurality of continuous pixel clocks, phase correction of pixel clock is performed at the timing of a clock signal from a high frequency clock generating means and its correction start timing is differentiated for each data region of different time series. COPYRIGHT: (C)2003,JPO

4. 发明专利

JP2003101131A SEMICONDUCTOR LASER CONTROLLER 审中-公开
公开(公告)号：JP2003101131A
公开(公告)日：2003-04-04
申请号：JP2001288516
申请日：2001-09-21
申请人： RICOH KK
发明人： OMORI JUNJI
IPC分类号： H01S5/0683
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor laser controller which can get stable optical output without recourse to the temperature properties of optical output and a monitor current, without using a detection element such as a temperature detector. SOLUTION: This semiconductor laser controller can reduce the ripple of a monitor current or optical output caused by the temperature properties of a semiconductor laser diode LD, by resetting the signal amplification factor A of a signal amplifier 21 which amplifies the light emission level monitor signal Vma monitoring the light emission level of a semiconductor laser LD, according to the values of the reference temperature signal VLD0 corresponding to a light emission level control signal and the operation voltage VLD corresponding to the drive current of the semiconductor LD, in the control section of a light-electric negative feedback loop 2 which controls the forward current at light emission of the semiconductor laser LD. This can perform the stable control of optical output without recourse to the temperature change by electric circuit constitution, without using other detectors such as a temperature detector, etc.

5. 发明专利

JP2002350494A VARIABLE SOCKET AND EVALUATION DEVICE FOR SEMICONDUCTOR INTEGRATED CIRCUIT 失效
公开(公告)号：JP2002350494A
公开(公告)日：2002-12-04
申请号：JP2001154991
申请日：2001-05-24
申请人： RICOH KK
发明人： OMORI JUNJI
IPC分类号： G01R31/26 , G01R1/073 , H01R33/76
摘要： PROBLEM TO BE SOLVED: To easily carry out attachment/detachment or change of an evaluation objective element and change of a measurement condition in a short time for improving working efficiency, to allow connection or switching of a plurality of peripheral circuits to one terminal in a semiconductor circuit, and to shorten electrical connection length of the peripheral circuit, a power source, and an earth to all the terminals for reducing influence on an impedance and improving noise control. SOLUTION: In this variable socket 11, a pair of chip part contacts 15 for electrically connecting a chip part 12 freely removably and a pair of lead part contacts 14 for electrically connecting a lead part 13 freely removably are arranged in the same socket.

6. 发明专利

JP2001171163A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001171163A
公开(公告)日：2001-06-26
申请号：JP35814699
申请日：1999-12-16
申请人： RICOH KK
发明人： NAKAJIMA TOMOHIRO , EMA HIDETOSHI , ISHIDA MASAAKI , ITO TATSUYA , ITO SATORU , OMORI JUNJI
IPC分类号： B41J2/44
摘要： PROBLEM TO BE SOLVED: To provide an image forming device having an image producing unit storing a photosensitive member, a light source means and a driving circuit therefor, and a light irradiation means, mounted detachably, with a good recycling property. SOLUTION: An image forming device 200 has an image producing unit 205 mounted and inserted detachably such that a connector 231 of the image producing unit 205 is connected automatically with a connector 241 of the image forming device 200 according to the insertion of the image producing unit 205. The image producing unit 205 comprises a photosensitive drum 213, a charge roller 214, a polygon mirror 217, a motor roller 217, a scanning lens 215, and a printed board 222, supported between easily separatable main body upper case 210 and main body lower case 211, with a semiconductor laser and a lens holder attached on the printed board 222. A toner case 212 storing a toner 224 is mounted on the lower surface of the main body lower case 211 as well as a developing roller 223 is mounted in the state supported between the toner case 212 and the main body lower case 211 so as to improve the recycling property.

7. 发明专利

JP2007001057A OPTICAL SCANNER AND IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：JP2007001057A
公开(公告)日：2007-01-11
申请号：JP2005181343
申请日：2005-06-22
申请人： RICOH KK
发明人： ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
IPC分类号： B41J2/44 , G02B26/10 , H04N1/04 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To scan an object precisely with a plurality of light beams from a light source unit. SOLUTION: When a photosensitive drum is scanned with light beams containing image information from a light source unit having three main light sources and three correction light sources, a processing circuit creates the control signal of each light source based on the positional information of a pixel formed by scanning. If there is a difference exceeding a tolerance limit between the distribution of quantity of light from the main light sources 1, 2 and 3 and an ideal distribution of quantity of light on the photosensitive drum, control signals of the correction light sources 1 and 2 are created depending on the difference. Consequently, the distribution of quantity of light on the photosensitive drum can be brought close to an ideal one when the photosensitive drum is scanned with light beams from a plurality of light sources. COPYRIGHT: (C)2007,JPO&INPIT

8. 发明专利

JP2003103830A METHOD OF GENERATING PIXEL CLOCK, PIXEL CLOCK GENERATING APPARATUS, AND IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：JP2003103830A
公开(公告)日：2003-04-09
申请号：JP2001302644
申请日：2001-09-28
申请人： RICOH KK
发明人： OMORI JUNJI , ISHIDA MASAAKI , NIHEI YASUHIRO
IPC分类号： B41J2/44 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a method of generating a pixel clock, a pixel clock generating apparatus, and an image forming apparatus wherein an amount of correction data is markedly reduced, cost reduction can be achieved by reduction of the memory size along with the reduction of the correction data, and moreover accurate correction of position shift of a dot can be executed. SOLUTION: This pixel clock generating apparatus comprises a data region setting means for setting a data region based on a data region set value for determining a number of clock signals in the data region consisting of a plurality of continuous clock signals and a phase shift data setting means for setting phase shift data for executing the phase shift by each data region set by the data region setting means.

9. 发明专利

JP2002324937A SEMICONDUCTOR LASER CONTROLLER 失效
公开(公告)号：JP2002324937A
公开(公告)日：2002-11-08
申请号：JP2001128345
申请日：2001-04-25
申请人： RICOH KK
发明人： OMORI JUNJI
IPC分类号： B41J2/44 , G11B7/125 , H01S5/0683
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor laser controller which stabilizes the light output control and precisely outputs light even when a semiconductor laser whose monitor current has a very small value. SOLUTION: The semiconductor laser controller includes a semiconductor laser, a photodetecting element which photodetects part of the light output of the semiconductor laser, an amplifier which amplifies a monitor signal as the output signal of the photodetecting element, and a circuit part which controls the output of the semiconductor laser so that the monitor signal amplified by the amplifier becomes equal to a light emission level control signal.

10. 发明专利

JP2001201910A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001201910A
公开(公告)日：2001-07-27
申请号：JP2000009630
申请日：2000-01-19
申请人： RICOH KK
发明人： OMORI JUNJI , EMA HIDETOSHI , ITO SATORU , NAKAJIMA TOMOHIRO , ISHIDA MASAAKI , ITO TATSUYA
IPC分类号： G03G21/00 , G03G15/01 , G03G21/18
摘要： PROBLEM TO BE SOLVED: To provide an image forming device which houses a photoreceptor, a light source means, a light projecting means and a substrate mounting a driving circuit for the light source means, etc., and enables a user to confirm whether or not an attachable/detachable image forming unit for every color is loaded in an appropriate position. SOLUTION: In the color image forming device 100, each color image forming unit 103Y, 103M, 103C and 103K is attachably/detachably loaded in each corresponding color opening part, and a discrimination plate 240 for discriminating whether each image forming unit 103Y, 103M, 103C and 103K is appropriately loaded in the opening part in accordance with the color of stored toner 214Y, 214M, 214C and 214K is attached to each unit, besides, a slit for making the discriminating plate 240 pass through is formed in the main body case 101. Then, each image forming unit 103Y, 103M 103C and 103K is easily and surely replaced while preventing each unit from being erroneously loaded.

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