专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2012109168A LED DRIVE CIRCUIT AND LED ILLUMINATION DEVICE 审中-公开
公开(公告)号：JP2012109168A
公开(公告)日：2012-06-07
申请号：JP2010258433
申请日：2010-11-19
申请人： SHARP KK
发明人： MURATA TAKESHI , KANAMORI ATSUSHI , WARITA HIROHISA , MATSUDA HIDEO , SHIMIZU TAKAYUKI
IPC分类号： H05B37/02
摘要： PROBLEM TO BE SOLVED: To provide a light emitting diode (LED) drive circuit and an LED illumination device capable of driving an LED appropriately even in a case being connected to an arbitrary phase control type dimmer.SOLUTION: An LED drive circuit can be connected to a phase control type dimmer and drives LED load by inputting a voltage based on an AC voltage. The LED drive circuit includes: an adjustment signal generation part that generates an adjustment signal according to a characteristic of the connected phase control type dimmer; and an adjustment part that adjust a characteristic for driving the LED load in response to the adjustment signal.

2. 发明专利

JP2003124519A LIGHT EMITTING DIODE DRIVE CIRCUIT AND OPTICAL TRANSMITTER USING THE SAME 审中-公开
公开(公告)号：JP2003124519A
公开(公告)日：2003-04-25
申请号：JP2001314470
申请日：2001-10-11
申请人： SHARP KK
发明人： MATSUDA HIDEO
IPC分类号： H01L33/00 , H04B10/2507 , H04B10/40 , H04B10/50 , H04B10/524 , H04B10/58 , H04B10/60 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To realize a light emitting diode drive circuit for rapidly driving a light emitting diode without overshooting. SOLUTION: In the LED drive circuit 1, the output current Ipk0 of a differentiating circuit 21 for differentiating a drive signal Vin is transmitted through a nonlinear current transfer element 22, and output as a peaking current Ipk. The current obtained by adding the current Ipk and the drive current Idrv substantially proportional to the drive signal Vin is supplied to the diode 2. Further, the current transfer ratio of the transfer element 22 is set to lower at the time of turning on a lamp than that at the time of turning off the lamp. Thus, even when the output current Ipk of the circuit 21 is set larger to the degree capable of extincting the diode 2, overshooting of the light signal waveform an be prevented.

3. 发明专利

JP2001066905A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001066905A
公开(公告)日：2001-03-16
申请号：JP24463299
申请日：1999-08-31
申请人： SHARP KK
发明人： MATSUDA HIDEO
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To suppress the size of a device to the absolute minimum and to increase the number of image forming sheets per unit time. SOLUTION: This image forming device is provided with a 1st and a 2nd image forming stations having photoreceptor belts 1a and 2a, developing devices 1d and 2d and 1st transfer rollers 1g and 2g successively transferring a toner image on transfer belts 1f and 2f. Then, 2nd transfer rollers 5 and 6 transferring the toner image formed on the belts 1f and 2f on recording paper P are disposed on the recording paper carrying path of a recording paper carrying unit 3 having a recording paper carrying belt 3a carrying the paper P by leaving a longer distance than the length of the paper P. Besides, this device is provided with a transfer control means simultaneously executing an operation that the toner image formed on the belt 1f is transferred on the paper P by the roller 5 and an operation that the toner image formed on the belt 2f is transferred on the paper P by the roller 6.

4. 发明专利

JP2000338739A COLOR IMAGE FORMING DEVICE 失效
公开(公告)号：JP2000338739A
公开(公告)日：2000-12-08
申请号：JP14614099
申请日：1999-05-26
申请人： SHARP KK
发明人： SHIMAZAWA YOICHI , MATSUDA HIDEO
IPC分类号： G03G21/00 , G03G15/00 , G03G15/01 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To improve throughput for monochrome image formation by disposing first and second developing means which develop respectively electrostatic latent images on the first and second photoreceptors with toner in the same color. SOLUTION: A first laser scanner unit(LSU) 18 and a second LSU 24 both form electrostatic latent images in the same black on a first photoreceptor 15 and a second photoreceptor 16, respectively, based on monochrome data, and they are formed into black toner images by being developed by a first black developing device 21A and a second black developing device 21B provided for the photoreceptors 15 and 16, respectively. Then, the black toner images formed on the respective photoreceptors 15 and 16 are transferred to the surface of an intermediate transfer belt 13 at the face opposite to transfer units 27 and 28. Thus, because the toner images in the same color can be formed by the use of both the first photoreceptor 15 and second photoreceptor 16 and the images in the same color can be formed at the same time, time required for the image formation can be shortened.

5. 发明专利

JP2000321925A COLOR IMAGE FORMING DEVICE 失效
公开(公告)号：JP2000321925A
公开(公告)日：2000-11-24
申请号：JP12772399
申请日：1999-05-07
申请人： SHARP KK
发明人： FUJIMOTO OSAMU , MATSUDA HIDEO
IPC分类号： H04N1/387 , G03G15/01 , G03G15/36 , G03G21/00 , G06F15/00 , G06K1/00 , H04N1/00 , H04N1/46 , H04N1/50
摘要： PROBLEM TO BE SOLVED: To provide a compact and inexpensive device constituted so that additional information can be added to a black-and-white image by using color other than black at a printing speed being identical to the speed of the forming time of the black-and-white image. SOLUTION: A digital color copying machine 1 is composed of two image proceeds parts respectively having a photoreceptor 11 or a photoreceptor 12. By using the 2nd image process part 71 being different from the 1st image process part 72 used for forming the black-and-white image, the images of a specifies pattern and a tracing pattern are formed. Thus, the specified pattern and the tracing pattern can be added to the black-and-white image while maintaining the speed being identical to that of the printing time of the black- and-white image.

6. 发明专利

JP2000081744A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2000081744A
公开(公告)日：2000-03-21
申请号：JP25223498
申请日：1998-09-07
申请人： SHARP KK
发明人： HIRAI MASASHI , MATSUDA HIDEO
IPC分类号： G03G15/00 , G03G15/01 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To accurately correct color slurring with simple constitution by superposing a pattern image being reference on a pattern image to be adjusted, measuring the density of both pattern images and judging a superposed state. SOLUTION: The pattern image P0 constituted of plural lines is transferred to a transfer carrying belt 216 by an image forming part for a color component being the reference. The pattern image P1 having the same shape is formed by the image forming part for a color component to be adjusted at timing that it is exactly superposed on the pattern image P0 of the color component being the reference on the belt 216. Then, the color slurring is corrected by setting the density value in an ideal state where the pattern image P0 of the color component being the reference is exactly superposed on the pattern image P1 of the color component to be adjusted to a prescribed value, and delaying or hastening a recording start signal for a laser beam scanner for the color component to be adjusted so that the measured value by a pattern image measuring sensor 232 may be within the tolerance of the specified value.

7. 发明专利

JP2000039817A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2000039817A
公开(公告)日：2000-02-08
申请号：JP20768598
申请日：1998-07-23
申请人： SHARP KK
发明人： MANABE NOBUO , MATSUDA HIDEO , YOSHIURA SHOICHIRO , YAMAMOTO HIRANAGA
IPC分类号： B41J29/00 , G03G21/00 , G03G21/16
摘要： PROBLEM TO BE SOLVED: To improve operability as a result of coping with respective parson using a digital copying machine, and to increase safety by utilizing a fact that respective processing block is movable. SOLUTION: This image forming device is provided with plural supporters 250 in an image reproduction output part 200 as a supporting means supporting a separated manuscript reading part 100. The plural supporters 250 are constituted movable in the vertical direction with respect to the image reproduction output part 200, and supporters driving means are disposed inside the image reproduction output part 200. A supporters driving step motor 253 is allowed to rotate, and to make the supporters 250 possible to be moved up and down by making a supporters driving shaft 251 rotated through a supporters driving gear 252.

8. 发明专利

JPH11261798A IMAGE EDIT RECORDING DEVICE AND IMAGE INFORMATION PROCESSING MANAGEMENT SYSTEM USING IT 失效
公开(公告)号：JPH11261798A
公开(公告)日：1999-09-24
申请号：JP6026298
申请日：1998-03-12
申请人： SHARP KK
发明人： MATSUDA HIDEO , YOSHIURA SHOICHIRO , HONDA YOSHITAKA , FUKUSHIMA TAMOTSU , KATAMOTO KOJI , GOMI KENICHI
IPC分类号： H04N1/21 , H04N1/387
摘要： PROBLEM TO BE SOLVED: To provide an additional function that is convenient and easily used and an added value from a manufacture of the device and from a user of the device as well by synthesizing specific image information while taking it into account that no effect is caused on original image information and printing out the image effectively on paper. SOLUTION: Original image information 111 and specific image information 110 are inputted to an image information input means 101 and the specific image information 110 is stored in a specific image information memory 102, and one specific image information 112 is selected among sets of the specific image information 110. The original image information 111 and advertising image information 112 are inputted to an image edit section 45, from which feature information is extracted respectively. Based on the feature information, 1st processing and 2nd processing are confirmed. The processing contents are fed to a synthesis processing confirmation means, where the processing of synthesizing the original image information and the advertising image information as one image is confirmed. A 1st processing section 103, a 2nd processing section 104 and an image information synthesis section 105 conduct each processing.

9. 发明专利

JPH1083123A TONER TRANSFERRING DEVICE 失效
公开(公告)号：JPH1083123A
公开(公告)日：1998-03-31
申请号：JP26829997
申请日：1997-10-01
申请人： SHARP KK
发明人： KAMIMURA TASUKE , TAKAI YASUHIRO , SHIMAZAWA YOICHI , NUKUSHINA ETSUJI , MATSUDA HIDEO
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To prevent the deterioration of image quality by enhancing transfer efficiency at the time of transferring a toner image formed on a photosensitive substance to an intermediate transfer belt. SOLUTION: The intermediate transfer belt 5 is laid around three rollers 5-5c and is brought into contact with a photosensitive substance belt 3 between the rollers 5a and 5b in order to transfer the toner image formed on the photosensitive substance belt 3 to the intermediate transfer belt 5. Transfer rollers 6a and 6b in which at least two rollers are arranged at a specified interval are provided in order to sufficiently secure a contact area with the photosensitive substance belt 3, so that the contact area is secured between contact P1 and P2 of the intermediate transfer belt 5 with the photosensitive substance belt 3, and stablized transfer potential having a specified width is secured by supplying the same voltage to the transfer rollers 6a and 6b and the transfer efficiency is improved.

10. 发明专利

JPH09106200A TONER TRANSFER DEVICE 失效
公开(公告)号：JPH09106200A
公开(公告)日：1997-04-22
申请号：JP24435196
申请日：1996-09-17
申请人： SHARP KK
发明人： KAMIMURA TASUKE , TAKAI YASUHIRO , SHIMAZAWA YOICHI , NUKUSHINA ETSUJI , MATSUDA HIDEO
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To improve transfer efficiency in the case of using a transfer roller when toner on a photoreceptor is transferred to an intermediate transfer belt temporarily and then transferred to a form. SOLUTION: An image of toner on the photoreceptor belt 3 is temporarily transferred to the intermediate transfer belt 5 which is pressed against the photoreceptor drum 3 through the operation of 2nd transfer rollers 6a and 6b constituting a 1st transfer device 6. Then the toner transferred to the intermediate transfer belt 5 is transferred to the form, which is sent to the press contact position of a 2nd transfer roller 7a constituting the 2nd transfer device 7, through the operation of the 2nd transfer roller 7a. Here, a counter electrode roller 7c which is grounded is provided at a specific distance 1 upstream in the rotation direction of the intermediate transfer belt 5. An electric field for transferring the toner to the form operates between the counter electrode roller 7c and 2nd transfer roller 7a to increase the transfer efficiency. The distance 1 is best 10-18mm. Further, the counter electrode roller 7c is provided rotatably, so the contact surface of the intermediate transfer belt 5 is never slaved.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式