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公开(公告)号：EP1438877A1
公开(公告)日：2004-07-21
申请号：EP02800685.6
申请日：2002-09-30
IPC分类号： H05B33/08
CPC分类号： H05B33/0818 , H05B33/0869 , H05B33/0872
摘要： An LED array is controlled by determining a constant relating the peak light output of an LED to the peak driving current of a PWM pulse driving the LED, and multiplying the average current of the PWM pulse by the constant to obtain a value of average light output for the LED. The constant may be determined by simultaneously measuring peak light output of the LED and peak current of a PWM pulse driving the LED. The constant is then calculated by dividing the peak light output by the peak current of the PWM pulse. By making the simultaneous measurements ata time during the duration of the PWM pulse where the pulse has reached its full magnitude, rise and fall times of the pulse do not affect the measurements. The average current of the PWM pulse may be determined by a variety of methods including integrating current in the PWM pulse over time, or passing the PWM current through a low pass filter configured for providing an average value of PWM current. Determining average current in this manner further reduces the effect of rise and fall time on determining the average light output of the LED.
摘要翻译： 通过确定将LED的峰值光输出与驱动LED的PWM脉冲的峰值驱动电流相关的常数以及将PWM脉冲的平均电流乘以该常数来控制LED阵列，以获得平均光输出的值 为LED。 该常数可以通过同时测量LED的峰值光输出和驱动LED的PWM脉冲的峰值电流来确定。 然后通过将峰值光输出除以PWM脉冲的峰值电流来计算常数。 通过在脉冲达到其全部幅度的PWM脉冲持续时间期间进行同时测量，脉冲的上升和下降时间不影响测量。 PWM脉冲的平均电流可以通过各种方法来确定，包括随时间对PWM脉冲中的电流进行积分，或者使PWM电流通过被配置用于提供PWM电流的平均值的低通滤波器。 以这种方式确定平均电流进一步降低了上升和下降时间对确定LED的平均光输出的影响。
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2.发明授权
公开(公告)号：EP1631438B1
公开(公告)日：2008-10-08
申请号：EP04731985.0
申请日：2004-05-10
发明人： HENDRIKS, Robert, F., M. , STALLINGA, Sjoerd , GOOSSENS, Hendrik, J. , 'T HOOFT, Gert, W. , VAN DER LEE, Alexander, M. , SCHUURMANS, Frank, J., P. , VULLERS, Rudolf, J., M. , KURT, Ralph , HENDRIKS, Bernardus, H., W. , BAKKER, Levinus, P.
CPC分类号： B29C59/022 , B29C2059/023 , B29D17/005 , B29L2017/003 , G11B7/00736 , G11B7/263
摘要： In the described method of producing a plurality of bodies bearing equal imprints of a stamp as optical structures, a stamp (13) is initially produced, by attaching particles (14) to a surface (15) of an auxiliary body (16); then, the stamp (13) is used to produce an imprint (11) on a plurality of bodies (10). Optical structures can be irradiated, producing on a screen a speckle pattern indicative of a key. It is substantially impossible to clone a given optical structure with current technological means. Optical structures represent physical One-Way Functions, easy to compute in the forward sense but unfeasible to reverse. Thus, they can be used to build an access/copy protection system of user information contained in an information carrier associated with the body 10. The reproducibility of the optical structures makes this method suitable for optical disks.
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公开(公告)号：EP1461649A1
公开(公告)日：2004-09-29
申请号：EP02805858.4
申请日：2002-12-12
IPC分类号： G02B6/00 , F21Y101/02
CPC分类号： G02B6/0028 , G02B6/0068 , G02F1/1336
摘要： A white light is provided for backlighting a liquid crystal display (12) by directing red green and blue light into the first end of a color mixing optical fiber (14), mixing the red green and blue light in the color mixing fiber (14) to produce white light, and conducting the white light out of the second end (18) of the color mixing fiber (14) to the liquid crystal display (12). The color mixing optical fiber (14) and sources (24) for generating the red green and blue light may be located remotely from the liquid crystal display (12), and the white light produced in the color mixing optical fiber (14) coupled to the liquid crystal display (12) by coupling optical fibers, thus simplifying and facilitating construction and operation of the backlighting system, and allowing for more convenient removal of heat remotely from the liquid crystal display (12).
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公开(公告)号：EP1631438A1
公开(公告)日：2006-03-08
申请号：EP04731985.0
申请日：2004-05-10
发明人： HENDRIKS, Robert, F., M. , STALLINGA, Sjoerd , GOOSSENS, Hendrik, J. , 'T HOOFT, Gert, W. , VAN DER LEE, Alexander, M. , SCHUURMANS, Frank, J., P. , VULLERS, Rudolf, J., M. , KURT, Ralph , HENDRIKS, Bernardus, H., W. , BAKKER, Levinus, P.
CPC分类号： B29C59/022 , B29C2059/023 , B29D17/005 , B29L2017/003 , G11B7/00736 , G11B7/263
摘要： In the described method of producing a plurality of bodies bearing equal imprints of a stamp as optical structures, a stamp (13) is initially produced, by attaching particles (14) to a surface (15) of an auxiliary body (16); then, the stamp (13) is used to produce an imprint (11) on a plurality of bodies (10). Optical structures can be irradiated, producing on a screen a speckle pattern indicative of a key. It is substantially impossible to clone a given optical structure with current technological means. Optical structures represent physical One-Way Functions, easy to compute in the forward sense but unfeasible to reverse. Thus, they can be used to build an access/copy protection system of user information contained in an information carrier associated with the body 10. The reproducibility of the optical structures makes this method suitable for optical disks.
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公开(公告)号：EP1576346A1
公开(公告)日：2005-09-21
申请号：EP03813697.4
申请日：2003-12-19
发明人： SCHUURMANS, Frank, J., P. , VAN BEEK, Michael, C. , BAKKER, Levinus, P. , RENSEN, Wouter, H., J. , HENDRIKS, Bernardus, H., W. , HENDRIKS, Robert, F., M. , STEFFEN, Thomas
CPC分类号： G01J3/02 , G01J3/0205 , G01J3/021 , G01J3/10 , G01J3/28 , G01J3/36 , G01N21/274 , G01N21/31 , G01N2021/3196 , G01N2201/129
摘要： The optical analysis system (20) for determining an amplitude of a principal component of an optical signal comprises a multivariate optical element (10) for reflecting the optical signal and thereby weighing the optical signal by a spectral weighing function, and a detector (9, 9P, 9N) for detecting the weighed optical signal. The optical analysis system (20) may further comprise a dispersive element (2) for spectrally dispersing the optical signal, the multivariate optical element being arranged to receive the dispersed optical signal. The blood analysis system (40) comprises the optical analysis system (20) according to the invention.
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公开(公告)号：EP1440604A1
公开(公告)日：2004-07-28
申请号：EP02775101.5
申请日：2002-10-16
IPC分类号： H05B33/08
CPC分类号： H05B33/0869 , G09G3/3406 , Y10S362/80
摘要： Apparatus for controlling an RBG based LED luminary which measures the output signals of filtered photodiodes and unfiltered photodiodes and correlates these values to chromaticity coordinates for each of the red, green and blue LEDs of the luminary. Forward currents driving the LED luminary are adjusted in accordance with differences between the chromaticity coordinates of each of the red, green and blue LEDs and chromaticity coordinates of a desired mixed color light.
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公开(公告)号：EP1576346B1
公开(公告)日：2007-12-19
申请号：EP03813697.4
申请日：2003-12-19
发明人： SCHUURMANS, Frank, J., P. , VAN BEEK, Michael, C. , BAKKER, Levinus, P. , RENSEN, Wouter, H., J. , HENDRIKS, Bernardus, H., W. , HENDRIKS, Robert, F., M. , STEFFEN, Thomas
CPC分类号： G01J3/02 , G01J3/0205 , G01J3/021 , G01J3/10 , G01J3/28 , G01J3/36 , G01N21/274 , G01N21/31 , G01N2021/3196 , G01N2201/129
摘要： The optical analysis system (20) for determining an amplitude of a principal component of an optical signal comprises a multivariate optical element (10) for reflecting the optical signal and thereby weighing the optical signal by a spectral weighing function, and a detector (9, 9P, 9N) for detecting the weighed optical signal. The optical analysis system (20) may further comprise a dispersive element (2) for spectrally dispersing the optical signal, the multivariate optical element being arranged to receive the dispersed optical signal. The blood analysis system (40) comprises the optical analysis system (20) according to the invention.
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8.发明公开SYSTEM FOR DARK-FIELD IMAGING OF TARGET AREAS BELOW AN OBJECT SURFACE 审中-公开SYSTEM FOR区域的OBJEKTOBERLÄCHE下暗场图片
公开(公告)号：EP1658487A1
公开(公告)日：2006-05-24
申请号：EP04744680.2
申请日：2004-07-29
CPC分类号： A61B5/0059 , G01N21/21 , G01N21/4795 , G01N2021/8822
摘要： A monitoring system for dark-field imaging of a target area (72) below a surface (70) of an object, e.g., capillary vessel under the surface of the skin of a patient, comprises an illumination optical system (31), an imaging system (35), and a selective optical interception system for suppressing illumination light returning from the region between the surface of the object and the target area. The interception system may comprise crossed polarizers (32, 37) in the illumination and imagining paths, respectively, and/or an aperture stop (51) arranged to intercept a central portion of the returning imaging beam. Alternatively, the illumination and imaging paths subtend an angle and the illumination focus and the imaging focus are displaced relative to each other. The monitoring system may be comprised in an analysis apparatus further comprising a spectroscopy system having an excitation system and a detection system.
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公开(公告)号：EP1438877B1
公开(公告)日：2006-05-10
申请号：EP02800685.6
申请日：2002-09-30
IPC分类号： H05B33/08
CPC分类号： H05B33/0818 , H05B33/0869 , H05B33/0872
摘要： An LED array is controlled by determining a constant relating the peak light output of an LED to the peak driving current of a PWM pulse driving the LED, and multiplying the average current of the PWM pulse by the constant to obtain a value of average light output for the LED. The constant may be determined by simultaneously measuring peak light output of the LED and peak current of a PWM pulse driving the LED. The constant is then calculated by dividing the peak light output by the peak current of the PWM pulse. By making the simultaneous measurements ata time during the duration of the PWM pulse where the pulse has reached its full magnitude, rise and fall times of the pulse do not affect the measurements. The average current of the PWM pulse may be determined by a variety of methods including integrating current in the PWM pulse over time, or passing the PWM current through a low pass filter configured for providing an average value of PWM current. Determining average current in this manner further reduces the effect of rise and fall time on determining the average light output of the LED.
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公开(公告)号：EP2080198A1
公开(公告)日：2009-07-22
申请号：EP07826547.7
申请日：2007-09-26
IPC分类号： G11B7/0065
CPC分类号： G11B7/0065 , G11B7/13 , G11B7/135
摘要： The present invention relates to an optical holographic device and a corresponding method for reading out a data page recorded in a holographic recording medium (106). In order to improve the bit error rate a reconstruction means (115) provided for reconstructing a dark and a light image from a separate checkerboard page comprising a pattern of dark and light pixels or from the detected imaged data page, and an image correction means (116) is provided for correcting said detected imaged data page by gain compensation using said reconstructed dark and light images.
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