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WO2018015537A1 - Procédé de commande d'un composant luminescent lors de l'extraction d'un capteur de caméra cmos et unité de commande - Google Patents

Procédé de commande d'un composant luminescent lors de l'extraction d'un capteur de caméra cmos et unité de commande Download PDF

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Publication number
WO2018015537A1
WO2018015537A1 PCT/EP2017/068480 EP2017068480W WO2018015537A1 WO 2018015537 A1 WO2018015537 A1 WO 2018015537A1 EP 2017068480 W EP2017068480 W EP 2017068480W WO 2018015537 A1 WO2018015537 A1 WO 2018015537A1
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WO
WIPO (PCT)
Prior art keywords
camera sensor
light
drive signal
cmos camera
pulse width
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.)
Ceased
Application number
PCT/EP2017/068480
Other languages
German (de)
English (en)
Inventor
Désirée QUEREN
Dominik SCHULTEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ams Osram International GmbH
Original Assignee
Osram Opto Semiconductors GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Osram Opto Semiconductors GmbH filed Critical Osram Opto Semiconductors GmbH
Publication of WO2018015537A1 publication Critical patent/WO2018015537A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/745—Detection of flicker frequency or suppression of flicker wherein the flicker is caused by illumination, e.g. due to fluorescent tube illumination or pulsed LED illumination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/50—Control of the SSIS exposure
    • H04N25/53—Control of the integration time
    • H04N25/531—Control of the integration time by controlling rolling shutters in CMOS SSIS
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units
    • G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source
    • G03B2215/0567—Solid-state light source, e.g. LED, laser
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/007—Details of energy supply or management

Definitions

  • the present invention relates to a method for driving ⁇ ern a light-emitting device when reading a CMOS camera sensor and a drive device for a light-emitting device in combination with a CMOS camera sensor.
  • Light emitting devices in the form of LEDs are used in combination with a CMOS camera sensor as a detector.
  • the LEDs can either be operated with a fixed electric current in continuous operation or with a fixed electric current over a longer pulse.
  • the current level can be changed ver ⁇ it both in continuous operation and the pulse operation to achieve a brightness dimming.
  • light-emitting components are operated in numerous applications in so-called PWM mode (English, pulse width modulation) with pulse-width-modulated drive signals.
  • CMOS camera sensors that use the rolling shutter readout principle, the captured scenes or images are scanned or read in rows or columns.
  • CMOS rolling shutter camera sensor Due to the line-wise or column-wise readout of the CMOS camera sensor operating according to the rolling shutter readout principle (“CMOS rolling shutter camera sensor”), however, in the case of a light modulated by the LEDs according to the PWM mode, different brightnesses can be achieved. Depending on the phase of the modulated illumination by the light-emitting component, either a completely bright line or an a completely dark line or a mixture of both. The resulting detected or read from ⁇ image can therefore have variations in brightness within the image and can thus appear blurry and out of focus on the viewer. In addition, there may be strong over- and underexposure effects on the CMOS camera sensor, which a CMOS driver can hardly compensate.
  • CMOS Global Shutter Camera Sensors There are also CMOS camera sensors that work according to the rolling shutter readout principle according to the Global Shutter-Auslese185 (“CMOS Global Shutter Camera Sensors”), in which all pixels of the CMOS camera sensor are read out simultaneously.
  • the object on which the invention is based is to provide an improved method for driving a light-emitting component during operation of a camera. to provide rasensors and a drive device for a lichtemittie ⁇ ing component in combination with a CMOS camera sensor.
  • the invention provides a method for driving a light-emitting component in a readout of a CMOS camera sensor, comprising the step of: operating the light-emitting component in a PWM mode with a pulse-width-modulated drive signal.
  • the invention provides a Ansteu ⁇ er adopted for a light emitting device in combination ⁇ nation with a CMOS-camera sensor, wherein the driving means is formed, operated in a PWM mode with a pulse ⁇ width modulated drive signal at a reading out of the CMOS camera sensor to become.
  • the light emitting device in the so-called PWM mode ⁇ (English, pulse width modulation) operated with a pulse width modulated drive signal.
  • the frequency of the pulse-width-modulated drive signals is such that a resulting operating behavior of the light-emitting components for a human observer can not be distinguished from a performance of a light-emitting component controlled by a constant drive signal.
  • a brightness of the light-emitting component can be controlled by PWM modulation, whereby a color locus shift, which is conventionally generated by driving the light-emitting component by means of current dimming, can be avoided.
  • Particularly advantageous method of the invention may arranged for example in a mobile phone with a on the back side, are used ⁇ light emitting device used as a flash in mobile terminals.
  • a further advantageous embodiment of the method provides that the frequency of the drive signal of the lichtemittie ⁇ generating device is greater than the sixteen times the frequency ei ⁇ nes line or column-modulated readout signal of the CMOS camera sensor.
  • the frequency of the drive signal of the lichtemittie ⁇ generating device is greater than the sixteen times the frequency ei ⁇ nes line or column-modulated readout signal of the CMOS camera sensor.
  • a further advantageous development of the method provides that the frequency of the drive signal of the light-emitting component is greater than twenty times the frequency of a line-wise or column-wise modulated readout signal of the CMOS camera sensor. In this way, a ⁇ be Sonder good homogeneity of brightness distribution of the image of the camera sensor can be realized without a synchroni- sation is required.
  • Very high frequencies in the driving of the light-emitting component can be achieved in that the electrical capacitances are small. Small electrical capacitances are achieved, in particular, by shorter line lengths between the drive device and the component.
  • the control device can be arranged very close to the component.
  • the drive device can be integrated together with the component in a substrate, in particular in a silicon substrate.
  • the drive signal of a row- or column-wise modulated readout signal of the CMOS camera sensor is synchroni ⁇ Siert.
  • it is advantageously a require- alteration reduce a frequency of the drive signal of lichtemittie ⁇ emitting component. This can be justified by the fact that the light emitting device is switched on each time ⁇ as soon as a read operation of a line or column of the image of the CMOS camera sensor begins. In this way, sufficient brightness of the image of the CMOS camera sensor is realized.
  • a further advantageous development of the method provides that the synchronization of the pulse-width-modulated control signal of the light-emitting component and the Zei ⁇ len- or column-modulated readout signal of the CMOS camera sensor on rising edges of the line or column-modulated readout signal of the CMOS camera sensor is carried out. In this way a simple Syn ⁇ chronization of the two signals and an efficient operation of the light emitting device can be provided.
  • a further advantageous development of the method provides that the synchronization of the pulse-width-modulated control signal of the light-emitting component and the pulse-width-modulated readout signal of the CMOS camera sensor is performed on rising and falling edges of the row-wise or column-wise modulated readout signal of the CMOS camera sensor. In this way, a particularly effi ⁇ cient operation and good control of brightness of the light-emitting device can be provided.
  • a further advantageous development of the method is characterized in that the light-emitting component is a matrix LED with a plurality of light-emitting pixels which are each driven with their own pulse-width-modulated drive signal.
  • a ⁇ the individual pixels are controlled Here, each with its own PWM driving signal to ⁇ advantageous, whereby it is provided for the read-out image information by the camera sensor a high uniformity.
  • the pulse width modulated drive signal of the light ⁇ emitting device is formed with variable electric currents, wherein the current value of the puls shimmerenmodulier ⁇ th driving signal of the light emitting device currency rend of reading an image of the camera sensor is kept constant.
  • the component is additionally controlled in addition to the pulse-width-modulated drive signal A with a DC drive signal C. So that the luminance of the device ⁇ incident light can be changed by increasing the DC control signal C in a simple and fast way, without duty having to change a frequency or an amplitude of the pulse width modulated drive signal A.
  • the DC control signal C is changed depending on a brightness of a surrounding area to be illuminated, in particular at remo ⁇ mender brightness of the environment increases.
  • a simple and rapid readjustment of the brightness of the light can be achieved ⁇ it to allow the recording of images with good quality by the camera sensor regardless of the ambient light.
  • a brightness sensor can be provided which detects the brightness and forwards a value for the ambient brightness to the control device.
  • the pulse width modulated drive signal A and the DC drive signal C changed ⁇ changed to vary the brightness of the emitted light at a constant color point of the emitted light from the device.
  • the illumination of the environment can be kept constant without changing the color location.
  • the pulse width modulated drive signal A and the DC drive signal C are changed in such a way that the lowest possible power consumption and / or the lowest possible heating of the device are obtained.
  • the control device uses, for example, corresponding characteristic curves, maps or calculation methods.
  • the pulse width modulated drive signal and / or the DC drive signal are changed ⁇ changed in order in a changing environment brightness constant brightness of the illuminated by the component environment or the illuminated by the component object with the lowest possible power consumption and / or the least possible heating to get the component.
  • FIG. 1 shows a schematic representation of a first embodiment of the method according to the invention for driving a light-emitting component for a CMOS camera sensor according to the rolling-shutter readout principle; a schematic representation of a second embodiment of the method according to the invention for driving a light emitting device for a CMOS camera sensor according to the rolling shutter readout principle; a schematic representation of Hellig ⁇ keitskorrektur using the inventive method in a single LED chip;
  • Figure 4 is a principle illustration of an Hellig ⁇ keitskorrektur by the method according to the invention in a matrix LED chip.
  • FIG. 5 block diagram of a mobile terminal
  • Fig. 6 is a schematic diagram of a
  • Fig. 7 is a diagram for a time course of a combined PWM dimming and current dimming.
  • CMOS rolling shutter camera sensor When using a light-emitting component in the form of LEDs for a read-out of a CMOS camera sensor, which operates on the Rolling-shutter-readout principle ("CMOS rolling shutter camera sensor”), it can because of the line or column-wise reading of the CMOS camera sensor with a modulated illumination by the CMOS rolling shutter camera sensor.
  • LEDs come to different light and dark areas on the detected image.
  • a completely bright line or a completely dark line or a mixture of both can be detected.
  • the resulting detected or read-out image can be as Hel ⁇ ltechniksschwankungen have within the image and can thus appear blurry and out of focus on the viewer. It is therefore proposed a method for driving a light emitting device having a good Schmqua ⁇ formality and an homogeneous illumination of a CMOS Rolling Shutter camera sensor realized in combination with a pulse width modulated operated light-emitting device.
  • FIG. 1 shows in a greatly simplified manner a principal mode of operation of a first embodiment of the method according to the invention for driving a light-emitting component in a row-wise or column-wise readout of a CMOS rolling shutter camera sensor
  • A is the pulse-width-modulated control signal of the LED
  • B denotes the row-wise or column-by-column readout signal of the CMOS rolling shutter camera sensor.
  • the frequency of the line-wise or column-wise readout signal of the CMOS rolling shutter camera sensor is usually in the kHz range. Recognizable in the figure is a readout of three lines of the CMOS rolling shutter camera sensor.
  • the pulse-width-modulated drive signal A for driving the light-emitting component in the form of LEDs has at least one rectangular shape with a maximum current value in the case of a row-wise or column-wise readout signal B of the CMOS rolling shutter camera sensor , wherein the light emitting device in the current flow is being ⁇ on and emits light.
  • a frequency of the pulse width modulated drive signal A of the lichtemittie ⁇ emitting component is a defined multiple of the frequency of the row-wise or column-wise readout signal B of the camera sensor.
  • a of the light emitting device fSENSOR frequency of the row or column have Auslesesig ⁇ Nals B of the CMOS camera sensor, it has been found that in the case that the frequency of the pulse width modulated drive signal A of the rindemittie ⁇ emitting component is sixteen times greater than the frequency of the readout signal B of CMOS Rolling shutter camera sensor, although it may still come to inhomogeneities between individual lines or columns of the camera sensor of about seven percent, a picture quality but can be useful or satisfactory.
  • the frequency of the readout signal specifies the frequency with which a line or a column of the camera sensor is read out.
  • the frequency of the pulse width modulated drive signal A of the light emitting device should be twenty times the frequency of the readout signal of the CMOS rolling shutter camera sensor in order to achieve good homogeneity in the entire image of the camera sensor.
  • FIG. 2 shows a basic mode of operation of a further embodiment of the method according to the invention for driving a light-emitting component in the form of LEDs in the case of a line-wise or column-wise readout of a CMOS rolling shutter camera sensor. It can be seen in this case that the pulse-width modulated drive signal A of the light-emitting component is synchronized with the line-wise or column-wise readout signal B of the CMOS rolling shutter camera sensor at rising edges of the readout signal B of the camera sensor.
  • Ver ⁇ driving provides that the pulse width modulated An Kunststoffsig ⁇ nal A of the light emitting device at rising and accumulating flanks of the readout signal B of CMOS Rolling shutter camera sensor is synchronized.
  • the operation of the light emitting device in a PWM mode with a pulse width modulated drive signal has not only advantages in a CMOS rolling shutter camera sensor but also in a CMOS global shutter camera sensor, a predictable and homogeneous Farbvertei ⁇ ment and good image quality to realize.
  • the predictability of the color locus is particularly important in a matrix LED chip with multiple light-emitting pixels.
  • many individual LED chips are driven separately to selectively illuminate and capture scenes with the CMOS camera sensor.
  • Current dimming of the light-emitting component can lead to color inhomogeneities between the individual pixels during detection with the CMOS camera sensor and thus to color inhomogeneities of the entire image, which are hardly compensable with known processing algorithms.
  • a PWM dimming preferably with a rectangular arrival control signal instead of a current dimming the brightness correction of the current value of the drive signal A of the lichtemit ⁇ animal forming device 100 can always be maintained constant at one of a completeness-ended image of the camera sensor 200 reading.
  • the current-dependent color locus shift can advantageously be avoided, and thus a requirement on the image algorithm, which composes the entire image from the individual lines, can be reduced. This in particular by the fact that no additional color corrections must be made in the image.
  • the proposed PWM dimming of the individual pixels in the matrix enables better color homogeneity within the matrix, which also results in better color homogeneity in the image of a scene.
  • different "color spots" are avoided in the recorded image, which can be corrected only with great effort with the help of Supervisoral- rithm.
  • FIGS. 3 and 4 show brightness correction by means of the PWM mode in a single LED chip and in a matrix LED.
  • the color location (gray level) remains the same for three different pulse width modulated drive signals.
  • the matrix LED chip as shown in FIG. 4, the PWM dimming of the individual elements (pixels) of the matrix results in a uniform color homogeneity (gray level) within the matrix without "color spots”.
  • a development of the method provides that, in addition to the above-described PWM dimming for brightness correction, a current dimming, ie a current-variable operation of the pulse-width-modulated drive signal A of the light-emitting component is undertaken. Due to this combination, the brightness range associated with the flash Illumination of the CMOS camera sensor can be achieved by the light-emitting device can be extended.
  • the brightness range is down in pure current dimming of the light-emitting device, i. limited to low electrical currents out.
  • the electrical currents are too low, electronic artefacts, for example due to tolerances of the drivers, are more pronounced or may not be adjustable under certain circumstances.
  • the proposed method advantageously also low brightnesses of the image of the camera sensor can be read without artifacts of the LED chips, which occur in the conventional exclusive power dimming and the semiconductor owed negative effect on the image.
  • the proposed PWM dimming a mittle ⁇ re temperature of the light emitting device can be further reduced and thus efficiency is increased.
  • the color Tempe ⁇ temperature can be kept stable, that in one period of a cooling phase is contained, which is not the case with conven- tional current dimming.
  • the method for driving a light-emitting component 100 as flash illumination (flash light) in a mobile terminal 300 can be used particularly advantageously.
  • FIG. 5 shows a schematic block diagram of a derarti ⁇ gen mobile terminal 300 with a light-emitting construction element 100, which is driven by a drive device 110 according to the above-mentioned principles. It can be seen further, the CMOS camera sensor 200 of the mobile terminal 300.
  • the driver 110 is preferably as an electrostatic ⁇ African unit formed which realizes the method according to the obi ⁇ gen principles.
  • the control device 110 has, for example, a data memory 600 in which characteristics, maps and / or control methods for controlling the component 100 are stored.
  • the driver 110 together with the device 100 on a common substrate 500 is arranged or integrated in ⁇ the substrate 500th
  • at least one part, in particular the entire drive device 110 can be integrated in the substrate 500 as an integrated circuit.
  • electrical line lengths between the component 100 and the drive device 110 are reduced. Since ⁇ the electrical capacitances are small, so that the on-control circuit 110 can drive the device 100 with a high Fre ⁇ frequency.
  • the substrate may, for example, comprise a semiconductor material, in particular silicon or silicon.
  • Fig. 6 shows in graphical manner the method 400 for driving a light emitting device 100 during egg ⁇ nes read out of the CMOS camera sensor 200.
  • Drive signal C used to drive the light emitting device.
  • FIG. 7 shows a diagram with time profiles of FIG
  • the pulse width modulated drive signal A is shown in the form of a dashed line.
  • DC drive signal C is shown as a dotted line Darge ⁇ .
  • the total drive signal G is shown as a solid line.
  • the PWM drive signal A remains unchanged over time t.
  • the DC drive signal C is increased from the first time tl from a first value Cl to a second value C2.
  • a brightness of the compo ⁇ element can be changed independently of the frequency of the PWM drive signal A and independent of the duty cycle of the PWM drive signal A. This allows increased flexibility in the exposure of an environment or an object and in the recording of an image of the environment or the object with the camera sensor. Furthermore, a more precise control of the brightness of the light of the component can thereby be achieved, even if the control device has a constant frequency. Thus the brightness of the light emitted by the component light can be achieved by increasing the DC control signal C in a simple and fast way ⁇ le, without duty having to change a frequency or an amplitude of the pulse width modulated drive signal A.
  • a basic brightness of the light-emitting component 100 can be changed, in particular increased.
  • the change, in particular ⁇ sondere increasing the basic brightness of the device emit light ⁇ is particularly at night and for a pre ⁇ zie set different light intensities with very small differences in brightness advantage.
  • the DC control signal C can be varied depending on egg ⁇ ner brightness of a surrounding area to be illuminated, in particular with decreasing brightness of the environment increases become.
  • a simple and rapid readjustment of the brightness of the emitted light from the component can be achieved in order to achieve the most uniform possible brightness of an environment or an object.
  • This allows the recording of good quality images by the camera ⁇ sensor regardless of the ambient light.
  • a light sensor 700 may be provided which detects the brightness of the ambient light and forwards a value for the brightness of the ambient light to the drive device 110.
  • the drive device 110 can have a data memory 600 with characteristic curves, tables and / or control methods with which the pulse-width-modulated drive signals A and DC drive signals C to be used for different ambient brightnesses are stored in order to achieve an approximately constant brightness with the light of the To get Bauele ⁇ mentes illuminated environment or the illuminated object.
  • exposures of an object or environment and thereby exposures of the object and the environment with the camera sensor at night or in low light conditions such as exposure to light may occur. Recordings in an interior are enhanced by a PWM dimming and a DC dimming.
  • these advantages can be when shooting a Bil ⁇ of a large brightness range and great detail (High Dynamic Range) by the camera sensor is ⁇ sets.
  • the color locus of the emitted light in a light-emitting diode ie an LED chip as a component accordingly the amplitude current of the PWM drive signal.
  • the color locus adjusts itself at a light ⁇ de depending on the DC drive signal from the amplitude Ström the PWM drive signal A and the duty cycle of the PWM drive signal A.
  • the pulse-width-modulated drive signal A and the DC drive signal C can be changed in order to vari ⁇ at a desired constant color location of the emitted ⁇ th light from the component the brightness of the emitted light.
  • the brightness of the light of the component can be increased at constant color point of the emitted light.
  • the brightness of the illuminated with the light of the component In order ⁇ ssen can be kept constant with a change in ambient brightness, without changing the chromaticity.
  • Light sensor 700 used, which is connected to the drive device 110.
  • the control device 110 can have characteristics, tables and / or control methods via the data memory 600, with which for predetermined color locations of the light emitted by the component for different ambient brightnesses or for different brightnesses of the light of the component to be used pulse width modulated drive signals A and DC -Anêtsignale C are stored in order to obtain a ⁇ approaching constant brightness of the illuminated with the light of Bauelemen- tes environment or different brightnesses of the light of the component without the color location of the light of the component changes.
  • the combined PWM dimming and DC dimming method can be used in order to produce a light with the same component color point with different brightness with the lowest possible power consumption.
  • the drive device 110 can via the data memory 600 via Have characteristic curves, tables and / or control methods with which for predetermined color locations of ⁇ th light emitted by the component for different brightnesses of the sent ⁇ th light to be used for lowest power consumption pulse width modulated drive signals A and DC drive signals C are stored ,
  • a current ⁇ efficient control of the device for light with moving ⁇ chem locus but to achieve different brightness of the light.
  • Dimming method can be used to generate the least possible ge ⁇ ing heating of the device, a light with the device with the same color location and different brightnesses.
  • the driving means 110 may include the data memory 600 via characteristic curves, tables and / or control method, with which for given color locations of the ⁇ element emitted by construction light of different brightness of the light, the pulse width modulated to be used for a lowest heating of the component drive signals A and DC drive signals C are stored.
  • a control of the device with different Brightness, ⁇ th of light but to achieve the same color point of light with mög ⁇ lichst low heat.
  • the invention provides an efficient technical concept ⁇ ULTRASONIC prepared which provides an improved read-out of an illuminated by a light emitting device camera sensor. An imaging quality of images acquired by means of the camera sensor is thereby advantageously increased.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Studio Devices (AREA)

Abstract

L'invention concerne un procédé de commande d'un composant luminescent lors de l'extraction d'un capteur de caméra CMOS et une unité de commande. L'invention concerne un concept technique efficace permettant une extraction améliorée d'un capteur de caméra CMOS éclairé par un composant luminescent du fait que le composant luminescent (100) fonctionne dans un mode MLI avec un signal de commande à modulation de largeur d'impulsions. Du fait de la commande à modulation de largeur d'impulsions du composant luminescent, il est possible d'éviter de manière avantageuse un décalage de la localisation chromatique de l'image du capteur de caméra. Une qualité de reproduction des images détectées par le capteur de caméra est ainsi augmentée de manière avantageuse.
PCT/EP2017/068480 2016-07-21 2017-07-21 Procédé de commande d'un composant luminescent lors de l'extraction d'un capteur de caméra cmos et unité de commande Ceased WO2018015537A1 (fr)

Applications Claiming Priority (2)

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DE102016113443.0A DE102016113443A1 (de) 2016-07-21 2016-07-21 Verfahren zum Ansteuern eines lichtemittierenden Bauelements beim Auslesen eines CMOS-Kamerasensors und Ansteuereinheit
DE102016113443.0 2016-07-21

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WO2018015537A1 true WO2018015537A1 (fr) 2018-01-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113473048A (zh) * 2021-06-16 2021-10-01 天津大学 面向脉冲阵列图像传感器的非均匀性校正方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007318581A (ja) * 2006-05-29 2007-12-06 Casio Comput Co Ltd 撮像装置、撮影補助光源発光／撮像制御方法、および撮影補助光源発光／撮像制御プログラム
US20130169167A1 (en) * 2011-11-08 2013-07-04 Hung-Lieh Hu Light devices
US20140203170A1 (en) * 2012-05-25 2014-07-24 Olympus Medical Systems Corp. Imaging system
US20140332662A1 (en) * 2013-05-08 2014-11-13 Mitutoyo Corporation Illumination setting method, apparatus and computer-readable medium for a brightness tool of an image measuring apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9787397B2 (en) * 2011-07-26 2017-10-10 Abl Ip Holding Llc Self identifying modulated light source
US9307600B2 (en) * 2012-11-20 2016-04-05 RedBeard Ventures LLC Synchronized light source for rolling shutter imagers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007318581A (ja) * 2006-05-29 2007-12-06 Casio Comput Co Ltd 撮像装置、撮影補助光源発光／撮像制御方法、および撮影補助光源発光／撮像制御プログラム
US20130169167A1 (en) * 2011-11-08 2013-07-04 Hung-Lieh Hu Light devices
US20140203170A1 (en) * 2012-05-25 2014-07-24 Olympus Medical Systems Corp. Imaging system
US20140332662A1 (en) * 2013-05-08 2014-11-13 Mitutoyo Corporation Illumination setting method, apparatus and computer-readable medium for a brightness tool of an image measuring apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113473048A (zh) * 2021-06-16 2021-10-01 天津大学 面向脉冲阵列图像传感器的非均匀性校正方法
CN113473048B (zh) * 2021-06-16 2022-08-30 天津大学 面向脉冲阵列图像传感器的非均匀性校正方法

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