DE3813664A1 - Ansteuerschaltung fuer ein feld aus lichtemittierenden elementen - Google Patents
Ansteuerschaltung fuer ein feld aus lichtemittierenden elementenInfo
- Publication number
- DE3813664A1 DE3813664A1 DE3813664A DE3813664A DE3813664A1 DE 3813664 A1 DE3813664 A1 DE 3813664A1 DE 3813664 A DE3813664 A DE 3813664A DE 3813664 A DE3813664 A DE 3813664A DE 3813664 A1 DE3813664 A1 DE 3813664A1
- Authority
- DE
- Germany
- Prior art keywords
- output
- register
- current
- control
- light emission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
- G06K15/1238—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point
- G06K15/1242—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on one main scanning line
- G06K15/1247—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on one main scanning line using an array of light sources, e.g. a linear array
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
- H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
- H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
- H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
- H04N1/4015—Compensating positionally unequal response of the pick-up or reproducing head of the reproducing head
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Led Devices (AREA)
- Control Of El Displays (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62097387A JP2644749B2 (ja) | 1987-04-22 | 1987-04-22 | 発光ダイオードアレイ用ドライバic |
| JP62114699A JPS63280568A (ja) | 1987-05-13 | 1987-05-13 | 発光素子駆動回路 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3813664A1 true DE3813664A1 (de) | 1988-11-10 |
| DE3813664C2 DE3813664C2 (enExample) | 1992-09-17 |
Family
ID=26438567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE3813664A Granted DE3813664A1 (de) | 1987-04-22 | 1988-04-22 | Ansteuerschaltung fuer ein feld aus lichtemittierenden elementen |
Country Status (2)
| Country | Link |
|---|---|
| US (2) | US4967192A (enExample) |
| DE (1) | DE3813664A1 (enExample) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990007752A1 (en) * | 1988-12-27 | 1990-07-12 | Eastman Kodak Company | Non-impact printer with current mirror driver |
| EP0379303A1 (en) * | 1989-01-19 | 1990-07-25 | Hewlett-Packard Company | Light emitting diode array current power supply |
| EP0629974A1 (en) * | 1993-06-18 | 1994-12-21 | Xeikon Nv | Non-impact printer with evenness control |
| EP0606736A3 (en) * | 1992-12-11 | 1995-03-15 | Nippon Kogaku Kk | A multi-LED color scanning device and associated color image scanning method. |
| CN103813579A (zh) * | 2012-11-09 | 2014-05-21 | 明阳半导体股份有限公司 | 发光二极管驱动电路及发光二极管的驱动系统 |
| US9781800B2 (en) | 2015-05-21 | 2017-10-03 | Infineon Technologies Ag | Driving several light sources |
| US9918367B1 (en) | 2016-11-18 | 2018-03-13 | Infineon Technologies Ag | Current source regulation |
| US9974130B2 (en) | 2015-05-21 | 2018-05-15 | Infineon Technologies Ag | Driving several light sources |
Families Citing this family (75)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5230067A (en) * | 1988-05-11 | 1993-07-20 | Digital Equipment Corporation | Bus control circuit for latching and maintaining data independently of timing event on the bus until new data is driven onto |
| US5272490A (en) * | 1989-10-31 | 1993-12-21 | Kyocera Corporation | Image forming apparatus with driving circuit elements at ends of an LED array simultaneously transmitting supplied data in opposing directions and simultaneously driving the same block of LEDs |
| DE69018587T2 (de) * | 1989-12-15 | 1996-01-25 | Oki Electric Ind Co Ltd | Steuerschaltung. |
| US5245355A (en) * | 1989-12-18 | 1993-09-14 | Eastman Kodak Company | Method and apparatus for grey level printing with amplitude and pulsewidth modulation |
| US5250963A (en) * | 1989-12-27 | 1993-10-05 | Am International, Inc. | Imaging diode array and system |
| JP2648400B2 (ja) * | 1990-10-12 | 1997-08-27 | 三菱電機株式会社 | 画像処理装置 |
| US5227790A (en) * | 1991-01-31 | 1993-07-13 | Oki Electric Industry Co., Ltd. | Cascaded drive units having low power consumption |
| JP2866758B2 (ja) * | 1991-07-05 | 1999-03-08 | 沖電気工業株式会社 | ノンインパクトプリンタ |
| US5475417A (en) * | 1991-10-25 | 1995-12-12 | Rohm Co., Ltd. | LED array printhead and method of adjusting light luminance of same |
| US5163760A (en) * | 1991-11-29 | 1992-11-17 | Eastman Kodak Company | Method and apparatus for driving a thermal head to reduce parasitic resistance effects |
| US5300961A (en) * | 1991-12-16 | 1994-04-05 | Xerox Corporation | Method and apparatus for aligning multiple print bars in a single pass system |
| JP3180972B2 (ja) * | 1992-03-05 | 2001-07-03 | ローム株式会社 | Led駆動用ic |
| US5317307A (en) * | 1992-05-22 | 1994-05-31 | Intel Corporation | Method for pulse width modulation of LEDs with power demand load leveling |
| US5668568A (en) * | 1992-11-13 | 1997-09-16 | Trans-Lux Corporation | Interface for LED matrix display with buffers with random access input and direct memory access output |
| JP3296882B2 (ja) * | 1993-05-26 | 2002-07-02 | 株式会社リコー | 輝度制御回路装置 |
| US5606349A (en) * | 1994-03-04 | 1997-02-25 | Diagraph Corporation | Ink jet system with serial data printheads |
| US5892532A (en) * | 1994-07-08 | 1999-04-06 | Oki Electric Industry Co., Ltd. | Non-impact printer and a print head thereof |
| US5633651A (en) * | 1994-11-04 | 1997-05-27 | Texas Instruments Incorporated | Automatic bidirectional indicator driver |
| JP3485654B2 (ja) * | 1994-11-28 | 2004-01-13 | 三洋電機株式会社 | 表示装置の調整方法 |
| US5644328A (en) * | 1995-03-03 | 1997-07-01 | Motorola | Apparatus and method for operating groups of led display pixels in parallel to maximize active time |
| JP3124230B2 (ja) * | 1995-08-11 | 2001-01-15 | 株式会社沖データ | 駆動装置 |
| US5748160A (en) * | 1995-08-21 | 1998-05-05 | Mororola, Inc. | Active driven LED matrices |
| US5661480A (en) * | 1995-09-18 | 1997-08-26 | Lucent Technologies Inc. | Analog-to-digital converters with reduced power and area using offset current compensation |
| US5926201A (en) * | 1995-12-28 | 1999-07-20 | Eastman Kodak Company | Driver IC configurable for recording in multiple resolutions printhead including the driver IC and method of operating the printhead |
| US5818501A (en) * | 1995-12-28 | 1998-10-06 | Eastman Kodak Company | Apparatus and method for grey level printing with improved correction of exposure parameters |
| EP0798618B1 (en) * | 1996-03-29 | 2002-02-20 | Kabushiki Kaisha Toshiba | Array device having functional circuits and constant current generating circuits for a plurality of channels |
| US5684368A (en) * | 1996-06-10 | 1997-11-04 | Motorola | Smart driver for an array of LEDs |
| US6185630B1 (en) * | 1997-02-14 | 2001-02-06 | Advanced Micro Devices, Inc. | Device initializing system with programmable array logic configured to cause non-volatile memory to output address and data information to the device in a prescribed sequence |
| US5903246A (en) * | 1997-04-04 | 1999-05-11 | Sarnoff Corporation | Circuit and method for driving an organic light emitting diode (O-LED) display |
| US6628333B1 (en) | 1997-11-12 | 2003-09-30 | International Business Machines Corporation | Digital instant camera having a printer |
| US6377235B1 (en) * | 1997-11-28 | 2002-04-23 | Seiko Epson Corporation | Drive circuit for electro-optic apparatus, method of driving the electro-optic apparatus, electro-optic apparatus, and electronic apparatus |
| JP3732345B2 (ja) * | 1998-02-10 | 2006-01-05 | 株式会社沖データ | 駆動回路、ledヘッド及びプリンタ |
| US5990802A (en) * | 1998-05-18 | 1999-11-23 | Smartlite Communications, Inc. | Modular LED messaging sign panel and display system |
| US6160354A (en) * | 1999-07-22 | 2000-12-12 | 3Com Corporation | LED matrix current control system |
| JP4550958B2 (ja) * | 1999-11-16 | 2010-09-22 | 株式会社沖データ | 駆動回路 |
| JP3709470B2 (ja) * | 2000-02-29 | 2005-10-26 | 株式会社沖データ | 画像記録装置 |
| JP3957150B2 (ja) * | 2001-02-08 | 2007-08-15 | セイコーインスツル株式会社 | Led駆動回路 |
| US7012597B2 (en) * | 2001-08-02 | 2006-03-14 | Seiko Epson Corporation | Supply of a programming current to a pixel |
| JP4089340B2 (ja) * | 2001-08-02 | 2008-05-28 | セイコーエプソン株式会社 | 電子装置、電気光学装置及び電子機器 |
| US6621235B2 (en) * | 2001-08-03 | 2003-09-16 | Koninklijke Philips Electronics N.V. | Integrated LED driving device with current sharing for multiple LED strings |
| EP2148317B1 (en) * | 2001-08-29 | 2018-06-20 | Gold Charm Limited | A semiconductor device for driving a current load device and a current load device provided therewith |
| US6777885B2 (en) | 2001-10-12 | 2004-08-17 | Semiconductor Energy Laboratory Co., Ltd. | Drive circuit, display device using the drive circuit and electronic apparatus using the display device |
| US7180479B2 (en) * | 2001-10-30 | 2007-02-20 | Semiconductor Energy Laboratory Co., Ltd. | Signal line drive circuit and light emitting device and driving method therefor |
| US7576734B2 (en) * | 2001-10-30 | 2009-08-18 | Semiconductor Energy Laboratory Co., Ltd. | Signal line driving circuit, light emitting device, and method for driving the same |
| US7742064B2 (en) * | 2001-10-30 | 2010-06-22 | Semiconductor Energy Laboratory Co., Ltd | Signal line driver circuit, light emitting device and driving method thereof |
| US7193619B2 (en) * | 2001-10-31 | 2007-03-20 | Semiconductor Energy Laboratory Co., Ltd. | Signal line driving circuit and light emitting device |
| US6803732B2 (en) * | 2001-12-20 | 2004-10-12 | Osram Opto Semiconductors Gmbh | LED array and LED module with chains of LEDs connected in parallel |
| JP3887229B2 (ja) * | 2001-12-28 | 2007-02-28 | 沖電気工業株式会社 | 電流駆動型表示装置の駆動回路 |
| JP3866606B2 (ja) * | 2002-04-08 | 2007-01-10 | Necエレクトロニクス株式会社 | 表示装置の駆動回路およびその駆動方法 |
| US7180513B2 (en) * | 2002-04-26 | 2007-02-20 | Toshiba Matsushita Display Technology Co., Ltd. | Semiconductor circuits for driving current-driven display and display |
| GB0218172D0 (en) * | 2002-08-06 | 2002-09-11 | Koninkl Philips Electronics Nv | Electroluminescent display device |
| JP3927902B2 (ja) * | 2002-11-29 | 2007-06-13 | キヤノン株式会社 | インクジェット記録ヘッド及び当該記録ヘッドを有するインクジェット記録装置及びインクジェット記録ヘッド用基板 |
| US20050212857A1 (en) * | 2002-11-29 | 2005-09-29 | Canon Kabushiki Kaisha | Recording head and recorder comprising such recording head |
| US7148632B2 (en) * | 2003-01-15 | 2006-12-12 | Luminator Holding, L.P. | LED lighting system |
| WO2004066248A1 (ja) * | 2003-01-17 | 2004-08-05 | Semiconductor Energy Laboratory Co., Ltd. | 電流源回路、信号線駆動回路及びその駆動方法並びに発光装置 |
| US20040217934A1 (en) * | 2003-04-30 | 2004-11-04 | Jin-Seok Yang | Driving circuit of flat panel display device |
| KR100619412B1 (ko) * | 2004-05-04 | 2006-09-08 | 매그나칩 반도체 유한회사 | 평판표시장치용 드라이버 |
| DE102004036686A1 (de) * | 2004-07-28 | 2006-03-23 | Manfred Kluth | Verfahren zum Ansteuern von Anzeigemitteln |
| KR20060037861A (ko) * | 2004-10-28 | 2006-05-03 | 삼성에스디아이 주식회사 | 데이터 구동부, 평판 표시장치 및 데이터 변환 방법 |
| US20060120202A1 (en) * | 2004-11-17 | 2006-06-08 | Yang Wan Kim | Data driver chip and light emitting display |
| KR100647317B1 (ko) * | 2005-02-03 | 2006-11-23 | 삼성전자주식회사 | 다채널 형광 측정용 광학계 및 이를 채용한 다채널 형광시료 분석 장치 |
| JP4809030B2 (ja) * | 2005-09-28 | 2011-11-02 | 株式会社リコー | 駆動回路及びその駆動回路を用いた電子機器 |
| TW200731199A (en) * | 2006-01-11 | 2007-08-16 | Seiko Epson Corp | Electro-optical device, method of driving electro-optical device, and electronic apparatus |
| TWI342542B (en) * | 2006-03-27 | 2011-05-21 | Himax Tech Inc | Source driver for display and method of driving thereof |
| JP4407670B2 (ja) * | 2006-05-26 | 2010-02-03 | セイコーエプソン株式会社 | 電気光学装置および電子機器 |
| US7884558B2 (en) * | 2006-07-14 | 2011-02-08 | Wolfson Microelectronics Plc | Driver apparatus and method |
| JP4371138B2 (ja) * | 2006-11-13 | 2009-11-25 | セイコーエプソン株式会社 | 光ヘッド、その制御方法、および画像形成装置。 |
| JP4420949B2 (ja) * | 2007-09-20 | 2010-02-24 | 株式会社沖データ | 駆動装置、駆動回路、ledヘッド及び画像形成装置 |
| US20090284445A1 (en) * | 2008-05-15 | 2009-11-19 | Sheng-Chang Kuo | Led data input scheme with sequential scan method and cascade connection for light emitting diode (led) display system |
| US7936135B2 (en) * | 2009-07-17 | 2011-05-03 | Bridgelux, Inc | Reconfigurable LED array and use in lighting system |
| JP2011119387A (ja) * | 2009-12-02 | 2011-06-16 | Mitsubishi Electric Corp | 発光素子回路および液晶表示装置 |
| JP4988893B2 (ja) * | 2010-03-26 | 2012-08-01 | 株式会社沖データ | 駆動回路、駆動装置及び画像形成装置 |
| US9232587B2 (en) * | 2011-09-30 | 2016-01-05 | Advanced Analogic Technologies, Inc. | Low cost LED driver with integral dimming capability |
| US8779696B2 (en) | 2011-10-24 | 2014-07-15 | Advanced Analogic Technologies, Inc. | Low cost LED driver with improved serial bus |
| US9144121B2 (en) | 2011-11-20 | 2015-09-22 | Jacobo Frias, SR. | Reconfigurable LED arrays and lighting fixtures |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319285A (en) * | 1976-04-01 | 1982-03-09 | Xerox Corporation | Exposure control for selective speed xerographic printing and the like |
| JPS59127468A (ja) * | 1983-01-12 | 1984-07-23 | Canon Inc | プリンタ |
| US4491875A (en) * | 1980-10-30 | 1985-01-01 | Canon Kabushiki Kaisha | Apparatus and method for tonal image processing |
| US4571602A (en) * | 1983-11-01 | 1986-02-18 | Agfa-Gevaert, N.V. | Recording apparatus |
| US4596995A (en) * | 1983-06-24 | 1986-06-24 | Canon Kabushiki Kaisha | Dot printer having means for correcting intensity variations |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2451237C2 (de) * | 1974-10-29 | 1985-10-10 | Texas Instruments Deutschland Gmbh, 8050 Freising | Schaltungsanordnung zum Ansteuern einer mehrere Anzeigesegmente enthaltenden, der Anzeige verschiedener Zeichen dienenden Anzeigevorrichtung |
| JPS5714058A (en) * | 1980-06-28 | 1982-01-25 | Ricoh Co Ltd | Printer |
| JPS5767955A (en) * | 1980-10-16 | 1982-04-24 | Canon Inc | Image recorder |
| CA1203927A (en) * | 1981-10-29 | 1986-04-29 | Minoru Sasaki | Drive circuit for display panel having display elements disposed in matrix form |
| DE3276289D1 (en) * | 1982-02-19 | 1987-06-11 | Agfa Gevaert Nv | Recording apparatus |
| US4424523A (en) * | 1982-07-02 | 1984-01-03 | Xerox Corporation | Read/write bar for multi-mode reproduction machine |
| JPS5946740A (ja) * | 1982-09-09 | 1984-03-16 | Ricoh Co Ltd | 光書込デバイス |
| US4689694A (en) * | 1983-01-12 | 1987-08-25 | Canon Kabushiki Kaisha | Image recording apparatus utilizing linearly arranged recording elements |
| US4491895A (en) * | 1983-11-14 | 1985-01-01 | Rogers Corporation | Decoupling capacitor and method of manufacture thereof |
| JPS6132093A (ja) * | 1984-07-23 | 1986-02-14 | シャープ株式会社 | 液晶表示装置の駆動回路 |
| US4596992A (en) * | 1984-08-31 | 1986-06-24 | Texas Instruments Incorporated | Linear spatial light modulator and printer |
| US4750010A (en) * | 1987-01-02 | 1988-06-07 | Eastman Kodak Company | Circuit for generating center pulse width modulated waveforms and non-impact printer using same |
| US4831395A (en) * | 1987-04-01 | 1989-05-16 | Eastman Kodak Company | Printer apparatus |
| US4746941A (en) * | 1987-10-13 | 1988-05-24 | Eastman Kodak Company | Dot printer with token bit selection of data latching |
-
1988
- 1988-04-20 US US07/184,025 patent/US4967192A/en not_active Expired - Fee Related
- 1988-04-22 DE DE3813664A patent/DE3813664A1/de active Granted
-
1990
- 1990-10-30 US US07/605,394 patent/US5138310A/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319285A (en) * | 1976-04-01 | 1982-03-09 | Xerox Corporation | Exposure control for selective speed xerographic printing and the like |
| US4491875A (en) * | 1980-10-30 | 1985-01-01 | Canon Kabushiki Kaisha | Apparatus and method for tonal image processing |
| JPS59127468A (ja) * | 1983-01-12 | 1984-07-23 | Canon Inc | プリンタ |
| US4596995A (en) * | 1983-06-24 | 1986-06-24 | Canon Kabushiki Kaisha | Dot printer having means for correcting intensity variations |
| US4571602A (en) * | 1983-11-01 | 1986-02-18 | Agfa-Gevaert, N.V. | Recording apparatus |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990007752A1 (en) * | 1988-12-27 | 1990-07-12 | Eastman Kodak Company | Non-impact printer with current mirror driver |
| EP0651349A1 (en) * | 1988-12-27 | 1995-05-03 | Eastman Kodak Company | Non-impact printer with current mirror driver |
| EP0379303A1 (en) * | 1989-01-19 | 1990-07-25 | Hewlett-Packard Company | Light emitting diode array current power supply |
| US5625470A (en) * | 1992-12-11 | 1997-04-29 | Nikon Corporation | Color image scanner having multiple LEDS and color image scanning method thereof |
| EP0606736A3 (en) * | 1992-12-11 | 1995-03-15 | Nippon Kogaku Kk | A multi-LED color scanning device and associated color image scanning method. |
| US5640190A (en) * | 1993-06-18 | 1997-06-17 | Xeikon N.V. | Non-impact printer with evenness control |
| EP0629974A1 (en) * | 1993-06-18 | 1994-12-21 | Xeikon Nv | Non-impact printer with evenness control |
| CN103813579A (zh) * | 2012-11-09 | 2014-05-21 | 明阳半导体股份有限公司 | 发光二极管驱动电路及发光二极管的驱动系统 |
| CN103813579B (zh) * | 2012-11-09 | 2016-04-06 | 明阳半导体股份有限公司 | 发光二极管驱动电路及发光二极管的驱动系统 |
| US9781800B2 (en) | 2015-05-21 | 2017-10-03 | Infineon Technologies Ag | Driving several light sources |
| US9974130B2 (en) | 2015-05-21 | 2018-05-15 | Infineon Technologies Ag | Driving several light sources |
| US10321533B2 (en) | 2015-05-21 | 2019-06-11 | Infineon Technologies Ag | Driving several light sources |
| US9918367B1 (en) | 2016-11-18 | 2018-03-13 | Infineon Technologies Ag | Current source regulation |
Also Published As
| Publication number | Publication date |
|---|---|
| US4967192A (en) | 1990-10-30 |
| DE3813664C2 (enExample) | 1992-09-17 |
| US5138310A (en) | 1992-08-11 |
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