WO2017144102A1 - Dispositif électronique et procédé de fonctionnement d'un dispositif électronique - Google Patents

Dispositif électronique et procédé de fonctionnement d'un dispositif électronique Download PDF

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Publication number
WO2017144102A1
WO2017144102A1 PCT/EP2016/053990 EP2016053990W WO2017144102A1 WO 2017144102 A1 WO2017144102 A1 WO 2017144102A1 EP 2016053990 W EP2016053990 W EP 2016053990W WO 2017144102 A1 WO2017144102 A1 WO 2017144102A1
Authority
WO
WIPO (PCT)
Prior art keywords
electronic device
flash module
led chip
ring flash
camera
Prior art date
Application number
PCT/EP2016/053990
Other languages
English (en)
Inventor
Chui Wai CHONG
Teng Hai Ocean CHUAH
Seong Tak KOAY
Geok Ling Adelene NG
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
Priority to PCT/EP2016/053990 priority Critical patent/WO2017144102A1/fr
Publication of WO2017144102A1 publication Critical patent/WO2017144102A1/fr

Links

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
    • 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
    • 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
    • G03B2215/0575—Ring shaped lighting arrangements

Definitions

  • the present invention relates to an electronic device and to a method for operating an electronic device.
  • Mobile electronic devices with integrated cameras are known in the state of the art. It is known to integrate cameras in ⁇ to mobile phones. It is also known to provide such mobile electronic devices with flash modules comprising LED chips.
  • An electronic device comprises a camera and a ring flash mod ⁇ ule arranged around an optical axis of the camera.
  • the ring flash module comprises at least one LED chip, a colour sensor and a memory chip.
  • the ring flash module of this electronic device may serve to illuminate objects while a picture is taken of these objects using the camera of the electronic device.
  • the arrangement of the ring flash module around the optical axis of the camera may help to provide homogeneous illumination with few shadows visible in the photograph.
  • the electronic de- vice is a mobile phone.
  • the ring flash module integrated into this mobile phone may allow to take high quality pictures using the camera integrated into this mobile phone .
  • the camera comprises a lens.
  • the ring flash module is arranged around the lens.
  • the ring flash module allows for a soft and homogeneous illumination of objects in front of the lens of the camera, in particular of objects which are located very close to the lens of the camera.
  • the ring flash module is designed for sensing a data related to an ambient light using the colour sensor, reading a value from the memory chip and driving the at least one LED chip based on the sensed data and the value.
  • this allows the ring flash module to adapt the flash light generated by the ring flash module to the ambient light in the environments of the electronic device. This may support a high colour fidelity and may help to prevent overexposure or underexposure .
  • the memory chip is provided for storing information related to at least one property of the at least one LED chip, in particular information related to a spectrum, a colour coordinate and/or a brightness of the at least one LED chip.
  • the information stored in the memory chip of the ring flash module may allow the ring flash module to adapt drive currents and/or drive voltages used for driving the at least one LED chip of the ring flash module to specific technical characteristics of the at least one LED chip. This may allow for an improved controllability of the light generated by the ring flash module.
  • the ring flash module comprises at least two LED chips designed for emitting light in different spectra. This allows the ring flash module to mix the light generated by the two LED chips to create a light mixture with adjustable colour.
  • the ring flash module comprises a first LED chip designed for emitting light in the red spectral range, a second LED chip designed for emitting light in the green spectral range, a third LED chip designed for emitting light in the blue spectral range and a fourth LED chip designed for emitting light in the yellow spectral range.
  • these four LED chips allow the ring flash module to generate a mixture of light with a colour that is fully controllable within a broad range.
  • the presence of the second LED chip designed for emitting light in the green spectral range and the fourth LED chip designed for emitting light in the yellow spectral range may help to allow for a particular precise adjustment of a white point of the generated light mixture.
  • a method for operating an electronic device with a camera and a ring flash module arranged around an optical axis of the camera, wherein the ring flash module comprises at least one LED chip, a colour sensor and a memory chip, comprises steps for sensing a data related to an ambient light using the colour sensor, reading a value from the memory chip and driving the at least one LED chip based on the sensed data and the value .
  • this method can allow for producing high quality photographs with good colour fidelity and homogeneous illumination of the depicted objects. Usage of the ring flash module arranged around the optical axis of the camera allows for a homogeneous illumination, producing only soft shadows.
  • Sensing a data related to an ambient light using the colour sensor allows for adapting the light generated by the at least one LED chip of the ring flash module to the ambient light to allow for high colour fidelity. Reading a value from the memory chip makes it possible to take specific technical properties of the at least one LED chip stored in the memory chip into account.
  • the sensed data is related to a colour coordinate and/or a brightness of the ambient light.
  • this makes it possible to adjust the light generated by the at least one LED chip of the ring flash mod- ule of the electronic device to the colour coordinate and/or the brightness of the ambient light to ensure a high colour fidelity of a photograph taken with the camera.
  • the value is read in depend- ence of the sensed data.
  • this may allow to adjust the light generated by the at least one LED chip of the ring flash module of the electronic device even more precisely to the sensed data related the ambient light.
  • the memory chip of the ring flash module of the electronic device may for example store information on drive voltages and/or drive currents suitable for generating a particular light colour and/or brightness using the specific at least one LED chip of the ring flash module of the electronic device.
  • Figure 1 shows an electronic device with a camera and a ring flash module
  • Figure 2 shows a block diagram of the ring flash module.
  • Figure 1 shows a schematic view of an electronic device 100.
  • the electronic device 100 may be a portable electronic device.
  • the electronic device 100 may for example be a mobile phone.
  • the electronic device 100 comprises an integrated camera 200.
  • the camera 200 is designed for taking still photographs and may also be designed for taking videos.
  • the camera 200 is a digital camera.
  • the camera 200 comprises a lens 210 that is arranged such that light can enter into the camera 200 from the environment of the electronic device 100 through the lens 210.
  • the lens 210 may for example be arranged in an opening of a wall of a housing of the electronic device 100.
  • An optical axis 205 of the camera 200 is defined by an optical axis of the lens 210 and may for example be arranged perpendicular to the wall of the housing of the electronic device 100.
  • the electronic device 100 further comprises a ring flash module 300.
  • the ring flash module 300 is provided for generating light to illuminate objects in the environment of the electronic device 100 that are to be photographed using the camera 200.
  • the ring flash module 300 comprises a ring-shaped emission face 305. Light generated by the ring flash module 300 is emitted at the emission face 305.
  • the ring flash module 300 is integrated into the electronic device 100 such that light emitted at the emission face 305 is emitted into the direc ⁇ tion of the objects in the environment of the electronic de- vice 100 that are to be photographed by the camera 200.
  • the ring flash module 300 is arranged around the optical axis 205 of the camera 200 such that the emission face 305 of the ring flash module 300 is arranged around the optical axis 205 of the camera 200.
  • the ring flash module 300 may be arranged in an opening of the wall of the housing of the electronic device 100 such that the emission face 305 of the ring flash module 300 is arranged around the lens 210 of the camera 200.
  • Figure 2 shows a schematic block diagram of the ring flash module 300.
  • the ring flash module 300 comprises at least one LED chip (light emitting diode chip), a colour sensor 350 and a memory chip 360.
  • the ring flash module 300 furthermore comprises a driving system 370.
  • the at least one LED chip of the ring flash module 300 is provided for generating visible light. It is possible that the ring flash module 300 comprises at least two LED chips designed for emitting light in different spectra.
  • the ring flash module 300 may comprise a first LED chip designed for emitting light in the blue spectral range and a second LED chip designed for emitting light in the yellow spectral range.
  • the ring flash module 300 comprises a first LED chip 310, a second LED chip 320, a third LED chip 330 and a fourth LED chip 340.
  • the first LED chip 310 is designed for emitting light in the red spectral range.
  • the second LED chip 320 is designed for emitting light in the green spectral range.
  • the third LED chip 330 is designed for emitting light in the blue spectral range.
  • the fourth LED chip 340 is designed for emitting light in the yellow spectral range.
  • a mixture of the light generated by the individual LED chips 310, 320, 330, 340 comprises a broad spectrum and may be re-feldd as white light.
  • the spectrum of the mixture of light may be adjusted. This may for example allow to adjust a colour coordinate of the mixture of light generated by the LED chips 310, 320, 330, 340.
  • the ring flash module 300 of the electronic device 100 with fewer or more than four LED chips 310, 320, 330, 340.
  • the fourth LED chip 340 designed for emitting light in the yellow spectral range may be omitted in a simplified embodiment.
  • the LED chips 310, 320, 330, 340 of the ring flash module 300 are connected to the driving system 370 of the ring flash module 300.
  • the driving system 370 serves to drive the LED chips 310, 320, 330, 340 by applying electric voltages and electric currents to the LED chips 310, 320, 330, 340.
  • the driving system 370 may be capable of adjusting the electric currents and/or the electric voltages applied to the LED chips 310, 320, 330, 340 to adjust the intensity and/or the spectrum of the light generated by each of the LED chips 310, 320, 330, 340. This allows the driving system 370 to adjust properties of the mixture of light generated by the LED chips 310, 320, 330, 340.
  • the colour sensor 350 of the ring flash module 300 is provided for sensing a data related to an ambient light in the environment of the electronic device 100.
  • the sensed data re- lated to the ambient light may for example be related to a colour coordinate and/or a brightness of the ambient light.
  • the colour sensor 350 may also be capable of sensing data related to more than one property of the ambient light.
  • the colour sensor 350 may also be referred to as an RGB sensor.
  • the colour sensor 350 is connected to the driving system 370 of the ring flash module 300.
  • the driving system 370 is capable of adjusting the light gen- erated by the LED chips 310, 320, 330, 340 in dependence of the sensed data provided by the colour sensor 350. This allows the driving system 370 to adjust the light emitted by the ring flash module 300 in dependence of the ambient light in the environment of the electronic device 100 to allow the camera 200 to produce high quality photographs at different ambient light situations.
  • the driving system 370 of the ring flash module 300 may for example adjust the light generated by the individual LED chips 310, 320, 330, 340 such that the mixture of the light generated by the LED chips 310, 320, 330, 340 is similar to the ambient light in the environment of the electronic device 100.
  • the memory chip 360 of the ring flash module 300 is provided for storing information related to at least one property of the LED chips 310, 320, 330, 340.
  • the memory chip 360 may for example be provided to store information related to a spec- trum, a colour temperature and/or a brightness of light gen ⁇ erated by the LED chips 310, 320, 330, 340.
  • the memory chip 360 may also store information related to electric voltages and/or electric currents necessary to drive the LED chips 310, 320, 330, 340 to generate light comprising a particular spectrum, a particular colour coordinate and/or a particular brightness.
  • the information stored in the memory chip 360 allows the driving system 370 of the ring flash module 300 to adapt the drive currents and/or drive voltages used for driving the LED chips 310, 320, 330, 340 to specific technologi- cal properties of the LED chips 310, 320, 330, 340.
  • the memory chip 360 of the ring flash module 300 is connected to the driving system 370.
  • the driving system 370 is capable of reading one or more values from the memory chip 360 and to drive the LED chips 310, 320, 330, 340 in dependence of the one or more values read from the memory chip 360.
  • the value read from the memory chip 360 may be read in dependence of the data sensed by the colour sensor 350.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Devices (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

Un dispositif électronique comprend une caméra et un module flash annulaire disposé autour d'un axe optique de la caméra. Le module flash annulaire comprend au moins une puce DEL, un capteur de couleurs et une puce mémoire.
PCT/EP2016/053990 2016-02-25 2016-02-25 Dispositif électronique et procédé de fonctionnement d'un dispositif électronique WO2017144102A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/053990 WO2017144102A1 (fr) 2016-02-25 2016-02-25 Dispositif électronique et procédé de fonctionnement d'un dispositif électronique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/053990 WO2017144102A1 (fr) 2016-02-25 2016-02-25 Dispositif électronique et procédé de fonctionnement d'un dispositif électronique

Publications (1)

Publication Number Publication Date
WO2017144102A1 true WO2017144102A1 (fr) 2017-08-31

Family

ID=55442793

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/053990 WO2017144102A1 (fr) 2016-02-25 2016-02-25 Dispositif électronique et procédé de fonctionnement d'un dispositif électronique

Country Status (1)

Country Link
WO (1) WO2017144102A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080175579A1 (en) * 2007-01-15 2008-07-24 Fujifilm Corporation Camera and strobe device
US20140146225A1 (en) * 2012-11-28 2014-05-29 Hon Hai Precision Industry Co., Ltd. Structure of a ring flash module
US20140340572A1 (en) * 2011-12-20 2014-11-20 Rohm Co., Ltd. Image pickup auxiliary light source device and digital camera provided with same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080175579A1 (en) * 2007-01-15 2008-07-24 Fujifilm Corporation Camera and strobe device
US20140340572A1 (en) * 2011-12-20 2014-11-20 Rohm Co., Ltd. Image pickup auxiliary light source device and digital camera provided with same
US20140146225A1 (en) * 2012-11-28 2014-05-29 Hon Hai Precision Industry Co., Ltd. Structure of a ring flash module

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