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WO2020013440A1 - Dispositif flash - Google Patents

Dispositif flash Download PDF

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Publication number
WO2020013440A1
WO2020013440A1 PCT/KR2019/006322 KR2019006322W WO2020013440A1 WO 2020013440 A1 WO2020013440 A1 WO 2020013440A1 KR 2019006322 W KR2019006322 W KR 2019006322W WO 2020013440 A1 WO2020013440 A1 WO 2020013440A1
Authority
WO
WIPO (PCT)
Prior art keywords
flash
light
led
camera
beam pattern
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/KR2019/006322
Other languages
English (en)
Korean (ko)
Inventor
이영식
김충섭
박양호
오시원
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.)
Optimech Co Ltd
Original Assignee
Optimech Co Ltd
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 Optimech Co Ltd filed Critical Optimech Co Ltd
Publication of WO2020013440A1 publication Critical patent/WO2020013440A1/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
    • 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
    • G03B2215/0514—Separate unit
    • G03B2215/0517—Housing
    • G03B2215/0525—Reflector
    • G03B2215/0528—Reflector movable reflector, e.g. change of illumination angle or illumination direction
    • 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

Definitions

  • the present invention relates to a flash device, and more particularly, to a flash device that can control the irradiation angle of the flash light to correspond to the camera angle of view according to various shooting conditions during camera shooting.
  • a portable electronic device such as a smartphone or a tablet computer is equipped with a camera.
  • These devices are equipped with a flash module so that the camera can be taken regardless of the location and time, and also to photograph the subject at night or in a dark place.
  • LED Light Emitting Diode
  • LED is widely used as an auxiliary light source of a camera for a portable electronic device. LED is relatively easy to mount and has the advantage of exerting the effect of a lantern in the dark as well as an auxiliary light source for the camera.
  • the picture quality is not only dependent on the camera's performance, but also on the external flash lighting conditions.
  • a portable electronic device such as a smart phone replaces a camera function, and thus there is a need to improve image quality accordingly. Therefore, there is a need for an LED flash device that can implement appropriate flash lighting according to various camera aspect ratios and illumination environments.
  • the camera flash has the characteristic that the light should be evenly irradiated to the shooting area of the camera while having an irradiation angle equal to or similar to that of the camera. Therefore, when irradiating light of uniform intensity in all directions, there is a problem that the roughness of the corner portion of the photographing area relative to the center becomes relatively low.
  • Korean Laid-Open Patent No. 10-2016-0104786 uses a special lens designed to increase the amount of light of an LED used as an auxiliary light source of a camera mounted on a mobile phone.
  • the amount of light is still increased only in an angle of view range of ⁇ 40 to 60 °, which makes it impossible to control the flash light for various shooting conditions, and it is difficult to control the flash light according to the camera focusing position.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a flash device capable of controlling the irradiation angle of the flash light to correspond to the camera angle of view according to various shooting conditions during camera shooting. .
  • the present invention provides a flash device that works in conjunction with a camera
  • the flash includes at least two LEDs having different irradiation angles, the flash irradiation of light irradiated according to the shooting conditions of the camera
  • the operation of each LED is controlled by the flash control unit so that the angle is adjusted, and when the operation of each LED is controlled by the flash control unit, at least one of the LEDs is turned off depending on shooting conditions when the camera is photographed.
  • At least one LED may be turned on to provide a flash device that is powered on.
  • the irradiation angle of the light irradiated by the flash may be achieved by combining the light emitted by the at least two LEDs.
  • the shooting condition includes information on a field of view (FoV) of the camera, and the flash is controlled to irradiate light at an irradiation angle corresponding to the field of view.
  • FoV field of view
  • the flash control unit may store information on the irradiation angle of the flash corresponding to the photographing angle of view of the camera.
  • the flash control unit may store information on the operating conditions of each LED corresponding to the irradiation angle of the flash.
  • the shooting condition includes information about focusing of the camera, and the flash may be controlled to irradiate light with a beam pattern corresponding to the focusing.
  • the flash control unit stores information about the focusing of the camera in a plurality of stages, and the flash is configured to irradiate light with a predetermined beam pattern corresponding to the plurality of stages. Can be controlled.
  • the predetermined beam pattern may be irradiated with light with a relatively high illumination to the focusing position of the camera than other portions.
  • the flash control unit may store information on the operating conditions of each LED corresponding to the beam pattern of the flash.
  • the shooting condition includes information on the flash mode of the camera selectable by the photographer, the pre-flash may be controlled to irradiate light with a beam pattern corresponding to the flash mode.
  • the flash control unit may store information on the operating conditions of each LED corresponding to the beam pattern of the flash.
  • any one or more of the LEDs may be disposed on different planes having an inclination angle with a plane on which at least one other LED is disposed.
  • At least one of the LEDs at least one LED chip; A color conversion layer formed on an upper surface of the LED chip; and a light blocking layer formed on an upper surface of the color conversion layer, wherein the light blocking layer blocks light emission toward an upper direction of the LED, and is in a lateral direction of the LED. It may be an LED that controls the amount of light in the lateral direction so as not to block the light emission to.
  • the light blocking layer includes a resin material and a light-shielding mixture uniformly dispersed in the resin material, wherein the resin material is any one selected from the group consisting of silicone resins and epoxy resins. It may be abnormal.
  • the content of the blocking mixture in the light blocking layer it is possible to adjust the blocking rate for light emission in the upper direction of the LED.
  • the thickness of the light blocking layer can be adjusted the blocking rate for light emission in the upper direction of the LED.
  • the flash apparatus of the present invention can control the irradiation angle of the flash light so as to correspond to the camera angle of view according to various shooting conditions when the camera is taken, it is possible to take a picture of excellent quality even in dark shooting conditions.
  • the flash device of the present invention can control the beam pattern of the flash light in accordance with the position or distance of the camera focusing, it can be usefully used for a camera having a focusing function.
  • the flash device of the present invention can control the beam pattern of the flash light in accordance with the flash mode, it is possible to take a picture of a variety of atmospheres through the flash mode selection.
  • FIG. 1 is a block diagram schematically illustrating an operation of a flash device according to an exemplary embodiment of the present invention.
  • FIG. 2 is a block diagram schematically illustrating the irradiation angle control of a flash device according to an embodiment of the present invention.
  • FIG 3 is a structural diagram showing a flash device and an LED included in the flash device according to an embodiment of the present invention.
  • FIG. 4 is a diagram of irradiation angle control of light irradiated by a flash device according to an exemplary embodiment of the present invention.
  • FIG. 5 is a block diagram schematically illustrating beam pattern control of a flash apparatus according to an exemplary embodiment of the present invention.
  • FIG. 6 is a diagram for beam pattern control of a flash according to focusing according to an exemplary embodiment of the present invention.
  • FIG. 7 is a block diagram schematically illustrating beam pattern control according to a flash mode of a flash device according to an exemplary embodiment of the present invention.
  • FIG. 8 is a diagram for beam pattern control of a flash according to a flash mode according to an exemplary embodiment of the present invention.
  • FIG. 9 is a structural diagram of a flash device according to an embodiment of the present invention.
  • FIG. 10 is a perspective view of an LED for a flash device according to an embodiment of the present invention.
  • FIG. 11 is an image of an LED for a flash device according to a preferred embodiment of the present invention.
  • FIG. 12 is a cross-sectional view of an LED for a flash device according to an embodiment of the present invention.
  • FIG. 13 is a cross-sectional view of an LED for a flash device according to a preferred embodiment of the present invention.
  • FIG. 14 is a cross-sectional view of an LED for a flash device according to a preferred embodiment of the present invention.
  • 15 is a light amount graph according to an irradiation angle of a conventional LED module for a flash device.
  • 16 is a light amount graph according to the irradiation angle of the LED for a flash device according to an embodiment of the present invention.
  • 'irradiation angle' refers to an area where light reaches a subject. In the present invention, not only the light of each LED but also the camera flash light is used.
  • the term 'view angle' refers to an area actually photographed by a camera, and represents a range of a subject that can be photographed in a certain screen by an angle of an optical system. That is, the angle of view represents the range in which the image can be captured within the determined image size in degrees.
  • the term 'in camera shooting' refers to a case where camera shooting is performed using flash light.
  • 'flash mode' refers to the flash types that the user can select according to the shooting purpose when shooting the camera. For example, if the user wants to focus light on a certain area while shooting the camera, select the 'highlight' flash mode. It is possible to focus the flash light only on a part of the area.
  • top means any space on any object.
  • it is meant to include a space of the upper surface in contact with the upper surface of any object, it is not limited thereto.
  • upper surface means a space that abuts the upper surface of any object, and means a space from the upper surface of the object to any point on the object.
  • light quantity means the photometric quantity to be measured or evaluated.
  • the irradiation angle of the flash light cannot be controlled to correspond to the camera angle of view according to various shooting conditions, and thus, it is difficult to photograph the camera using the flash in some shooting conditions such as a dark space.
  • the beam pattern cannot be controlled according to the camera focusing, it is difficult to irradiate the flash light to correspond to the position or distance of the focusing.
  • the present invention provides a flash device operating in conjunction with a camera, wherein the flash includes at least two LEDs having different irradiation angles, and the flash includes a flash control unit to adjust an irradiation angle of light to be irradiated according to shooting conditions of the camera.
  • the flash control unit when the operation of each LED is controlled by the flash control unit any one or more of the LEDs may be turned off or on depending on the shooting conditions at the time of camera shooting, at least one
  • the LED of the present invention seeks to solve the above problems by providing a flash device that is powered on.
  • the irradiation angle of the flash light to be controlled to correspond to the camera angle of view according to various shooting conditions when the camera is taken, so that it is possible to take a high quality picture even in a difficult shooting condition such as a dark environment.
  • the beam pattern of the flash light can be controlled according to the camera focusing, and the flash light can be adjusted according to the position and distance of the focusing.
  • the flash device comprises at least two LEDs having different irradiation angles.
  • the irradiation angle of the light irradiated by the flash of the present invention can be achieved by combining the light emitted by the at least two LEDs.
  • the flash device may include two or more LEDs by variously combining a relatively narrow irradiation angle LED and a wide irradiation angle LED.
  • the irradiation angles of at least two LEDs need only be different, and the irradiation angles of the plurality of LEDs need not all be different.
  • the light emitted by each of the LEDs may be combined to achieve an irradiation angle of light emitted by the flash.
  • the range of irradiation angle is not limited, but preferably, when the irradiation angle of the LED with a narrow irradiation angle and the LED with a wide irradiation angle is compared, the LED included in the flash device may be configured so that there is no empty irradiation angle range. have. For example, if the irradiation angle range of the narrower LED of the at least two LEDs is 0 to 50 °, the irradiation angle range of the LED with the wider irradiation angle should include at least 50 to 90 °.
  • the irradiation angle range of the LED with the narrower irradiation angle of the at least two LEDs is 0 to 50 °
  • the irradiation angle range of the flash light is set to 80 to 90 ° or 50 to 60 °. It may be difficult to irradiate flash light suitable for various shooting environments due to being partially empty.
  • the flash controller controls the operation of each LED so that the irradiation angle of the light irradiated by the flash is adjusted according to the shooting conditions of the camera.
  • the flash control unit controls the operation of each LED, any one or more of the LEDs are turned off or on, depending on the shooting conditions when the camera is taken, at least one LED is powered on.
  • the flash control unit controls the operation of each LED does not mean to control at least two or more LEDs uniformly, it means that each LED operation is controlled individually. Accordingly, since each LED operation can be controlled differently or the same, it is possible to adjust the flash light in more detail as compared to the case of controlling the LED uniformly, there is an effect that can be utilized for various shooting conditions.
  • FIG. 1 is a block diagram schematically illustrating a method of operating a flash apparatus according to an exemplary embodiment of the present invention.
  • each of the LEDs 1110 and 2 included in the flash 100 includes the flash control unit 10 so that the irradiation angle of the light emitted by the flash 100 may be adjusted according to the camera photographing condition (A). 110 ', LED 3 (110'), etc.
  • each of LED 1 (110), LED 2 (110 '), LED 3 (110 "), etc. is turned off or on. The operation is controlled and at least one is controlled to be turned on.
  • each LED operation control by the flash control unit is determined according to the camera shooting conditions. For example, when performing camera shooting in a dark environment, a plurality of LEDs included in the flash device of the present invention may all be turned on, and when performing camera shooting in a somewhat bright environment, some of the plurality of LEDs are turned off and some Can be turned on. When some LEDs are turned on, depending on the camera shooting environment, only LEDs having the same irradiation angle may be turned on to maximize the amount of light at a range of irradiation angles, and some LEDs having different irradiation angles may be turned on to cover a wide range of irradiation angles. The amount of light may be appropriately controlled. As described above, the LED device of the present invention can adjust the irradiation angle of the flash light according to various shooting conditions, thereby improving the usability of the camera.
  • the camera shooting condition (A) includes not only information on various shooting environments but also information on various conditions necessary for high quality camera shooting.
  • the information may include information on a field of view (FoV) of the camera, information on focusing of the camera, and information on a flash mode of the camera selectable by the photographer.
  • FoV field of view
  • the camera shooting conditions include information on a field of view (FoV) of the camera, the flash is irradiated with light at an irradiation angle corresponding to the field of view by a flash control unit Can be controlled.
  • the camera controller may store information about an irradiation angle of a flash corresponding to the camera photographing angle of view, and may control the flash to emit light at an irradiation angle corresponding to the camera photographing angle of view based on the information. .
  • the flash 100 irradiates light having a predetermined range of irradiation angles so as to correspond to an angle of view of the camera module 1.
  • the flash 100 includes at least two LEDs having different irradiation angles from the base substrate 120, and the light emitted by each of the LEDs 110 and 110 ′ 110 ′′ is combined to irradiate the flash 100. The irradiation angle of light is determined.
  • FIG. 3 is a block diagram schematically illustrating a method for controlling a flash irradiation angle of a flash device according to an exemplary embodiment of the present invention.
  • the flash control unit 10 may be controlled to adjust an irradiation angle of light irradiated by the flash 100 according to information A1 of a camera photographing angle of the camera photographing condition.
  • the flash controller 10 stores the information 20 on the irradiation angle of the flash light corresponding to the camera photographing angle of view, thereby controlling the irradiation angle of the flash 100.
  • the flash control unit may store information on an operating condition of each LED corresponding to the irradiation angle of the flash. Accordingly, the operation of each LED can be individually controlled so that the flash can irradiate light at an irradiation angle corresponding to the camera photographing angle of view.
  • the LED 1 110, the LED 2 110 ′, the LED 3 110 ′′, and the like may be displayed based on information about the LED operating conditions 30 corresponding to the irradiation angle of the flash light stored in the flash controller. Is controlled.
  • the light emitted by each of LED 1 110, LED 2 110 ', LED 3 110 ", etc. is combined to achieve an irradiation angle of flash light. That is, by controlling each LED operation individually, the flash 100 can be controlled to have an irradiation angle corresponding to the camera photographing angle of view.
  • the flash light can be adjusted in detail as compared to the case of controlling the LED uniformly, so that the flash light of the irradiation angle more suitable for the shooting angle can be irradiated. There is.
  • the present invention can control the irradiation angle of the flash light by including at least two LEDs having different irradiation angles, and at the same time, the operation of controlling the operation of each LED individually to irradiate the irradiation angle corresponding to the photographing angle of view. You can also control the flash to have.
  • Figure 4 is a structural diagram for adjusting the irradiation angle of the light irradiated by the flash device according to an embodiment of the present invention.
  • the flash apparatus of the present invention may adjust an irradiation angle of light irradiated by the flash according to the information A1 on the photographing angle of view of the camera among the camera photographing conditions.
  • the flash apparatus may include LED 1110 and LED 2 110 ′ having different irradiation angles such that the light of the flash 100 has an irradiation angle corresponding to a photographing angle of view.
  • each LED is controlled so that the LED 1 110 is turned on and the LED 2 110 'is turned off so that the light of the flash 100 has an irradiation angle corresponding to the photographing angle of view. Can be.
  • the camera photographing condition includes information on focusing of the camera, and the flash may be controlled to irradiate light with a beam pattern corresponding to the focusing.
  • the information on focusing of the camera may include a location of a focused subject, a distance from a camera lens, and the like, and may refer to various information necessary for focusing and taking a picture.
  • the camera controller may store information about focusing of the camera in a plurality of steps, and the flash may be controlled to irradiate light with a predetermined beam pattern corresponding to the plurality of steps.
  • the flash controller 10 may control the flash 110 according to the information A2 about camera focusing in the camera photographing condition.
  • the flash controller 10 may store information 40 divided into a plurality of stages for focusing the camera, and store predetermined beam pattern information 50 corresponding to the plurality of stages.
  • the flash 100 may be controlled to irradiate light to the beam pattern by the predetermined beam pattern information 50.
  • the flash control unit may store information on an operating condition of each LED corresponding to the beam pattern of the flash. Accordingly, it is possible to individually control the operation of each LED so that the flash can irradiate light with the beam pattern corresponding to the camera focusing. Each LED operation may be controlled not only when the user manually adjusts focusing but also when adjusting focusing through an auto focusing function.
  • information about camera focusing is generated manually or automatically for a focused subject, and the camera flash controller may turn off or turn on some LEDs of the plurality of LEDs based on the information. That is, the LEDs at the same or different positions may be turned off or on depending on whether the focusing is located at the corner region or the center region of the camera photographing region.
  • the LEDs 1110, LEDs 2110 ′, LEDs 3110 ′′, and the like may be provided based on information about LED operating conditions 60 corresponding to a predetermined beam pattern stored in the flash controller. The operation of is controlled. The light emitted by each of LED 1110, LED 2110 ', and LED 3110 " may be combined to allow the flash to emit light in a predetermined beam pattern. That is, the flash 100 may be controlled to irradiate light of a beam pattern corresponding to a plurality of steps for focusing by controlling the operation of each LED to be turned off or on individually.
  • the beam pattern can be precisely pre-determined to be suitable for focusing compared to the case of uniformly controlling the LEDs. Accordingly, the flash light is more precisely irradiated when the picture is taken through focusing, and thus the high quality picture can be taken.
  • the predetermined beam pattern may be a flash light is irradiated with a relatively high illuminance than the other portion to the focusing position of the camera.
  • the camera photographing area is divided into n (multiple), and the area in which focusing is located in each area may be irradiated with the light of the flash with higher illumination than other areas.
  • the region disposed relatively close to the region where the focusing is located may have a higher illuminance of irradiated light than the region disposed relatively far from the region where the focusing is located.
  • the flash light is irradiated with a higher illuminance at the focusing position, so that a high quality photograph can be taken according to the focusing.
  • FIG. 6 is a diagram illustrating beam pattern control of a flash according to focusing according to an exemplary embodiment of the present invention.
  • the camera photographing area is divided into nine (Y 1 to Y 9 ).
  • the area Y 7 in which the focusing X is located is flashed so that the light of the flash is irradiated with a relatively high illuminance compared to the other areas Y 1 to Y 6 , Y 8 and Y 9 in which the focusing X is not located.
  • the beam pattern of can be controlled.
  • focusing (X) the location area (Y 7) with a relatively close arrangement region (Y 4, Y 5, Y 8) is focused (X) the location area (Y 7) and relatively far away as to
  • the illuminance of the irradiated flash light may be higher than that of the regions Y 1 to 3 , Y 6 , and Y 9 .
  • the region Y5 in which the focusing X is located is relatively larger than the other regions Y 1 to Y 4 and Y 6 to Y 9 in which the focusing X is not located.
  • the beam pattern of the flash can be controlled so that the light of the flash is irradiated with high illumination.
  • some areas Y 2 , Y 4 , Y 6 , and Y 8 may have higher illuminance of irradiated flash light than the other areas Y 1 , Y 3 , Y 7 , and Y 9 .
  • the beam pattern may be predetermined in various patterns. Therefore, it can be usefully used in various electronic devices equipped with a camera having a focusing function.
  • the camera photographing condition includes information on a flash mode of the camera selectable by the photographer, and the flash may be controlled to irradiate light with a beam pattern corresponding to the flash mode.
  • the flash mode refers to types of flash beam patterns that can be selected by a photographer according to a shooting purpose during camera shooting. For example, 'Highlight Flash Mode', which focuses on a certain area of the camera's shooting area to increase attention, and 'Indoor', which maximizes the mood of the photo by irradiating light on the upper side area of the camera shooting area.
  • Shooting flash mode ' may be included. The photographer may select a flash mode stored in the camera and control a beam pattern of the flash to take a picture for various purposes.
  • the flash controller 10 may control the flash 100 according to the information A3 of the flash mode of the camera that the photographer can select among the camera photographing conditions.
  • the flash controller 10 may store beam pattern information 70 corresponding to the flash mode of the camera.
  • the flash 100 may be controlled to irradiate light with a predetermined beam pattern by the beam pattern information 70 corresponding to the flash mode of the camera.
  • the flash control unit may store information on an operating condition of each LED corresponding to the beam pattern of the flash. Accordingly, it is possible to individually control the operation of each LED so that the flash can irradiate light in the beam pattern corresponding to the flash mode of the camera.
  • each of LED 1 110, LED 2 110 ′, and LED 3 110 ′′ may be performed based on information about LED operating conditions 80 corresponding to a beam pattern stored in a flash controller.
  • the light emitted by each of the LED 1 110, the LED 2 110 ′, the LED 3 110 ′′, and the like may be combined to allow the flash to irradiate light with a beam pattern corresponding to the flash mode. That is, by controlling the operation of each LED to be turned off or on individually, the flash 100 may be controlled to irradiate light of a beam pattern corresponding to the flash mode selected by the photographer among various flash modes. Accordingly, it is possible to take a picture of a variety of atmospheres, it can be usefully used in various electronic devices equipped with a camera.
  • FIG. 8 is a diagram for beam pattern control of a flash according to a flash mode according to an exemplary embodiment of the present invention.
  • FIG. 8A illustrates an example of a beam pattern corresponding to the “highlight flash mode”
  • FIG. 8B illustrates an example of a beam pattern corresponding to the “indoor imaging flash mode”.
  • the beam pattern of the flash may be controlled so that light is intensively irradiated to the central region a of the dog, which is a subject to be photographed.
  • the beam pattern of the flash may be controlled such that light is irradiated with high illuminance toward the area b adjacent to the center area a from the area d farthest from the center area a.
  • the beam pattern of the flash may be controlled to intensively irradiate light onto the upper side region c of the photographing region.
  • the beam pattern of the flash may be controlled so that light is irradiated with lower illumination toward the lower center region a from the upper side region c.
  • the flash device of the present invention can be used not only as an auxiliary light source for camera flash but also as a light source such as a lantern in a dark place.
  • the irradiation angle, the amount of light, etc. may be manually adjusted by the photographer. Accordingly, there is an advantage that can be usefully used not only when photographing the camera but also when a light source is needed in everyday life.
  • the LEDs may be spaced apart on the same plane. Specifically, at least two LEDs may be arranged to be spaced apart by a predetermined distance on the same plane, and the predetermined distance may be appropriately determined according to a photographing area, an aspect ratio, etc. of a camera on which the LED module is mounted.
  • any one or more of the LEDs may be disposed on different planes that form an inclination angle with a plane on which at least one other LED is disposed.
  • the effect of adjusting the irradiation angle can be maximized by adjusting the arrangement of the LEDs having different irradiation angles.
  • it is possible to maximize the effect of the power of the plurality of LED is turned off or on. Accordingly, the irradiation angle of the flash light can be controlled effectively according to the shooting conditions when the camera is photographed.
  • the inclination angle between the planes may be adjusted according to the size, screen ratio, etc. of the camera on which the LED module is mounted.
  • Figure 9 is a structural diagram of a LED module for a camera flash according to a preferred embodiment of the present invention according to a preferred embodiment of the present invention.
  • one LED 110 may be disposed on a different plane that forms an inclination angle with a plane on which the other two LEDs 110 ′ and 110 ′′ are disposed.
  • the LED included in the LED module of the present invention is at least one LED chip; A color conversion layer formed on the LED chip; And a light blocking layer formed on an upper surface of the color conversion layer, wherein the light blocking layer blocks light emission in an upper direction of the LED and does not block light emission in a side direction of the LED. It may be a camera LED for adjusting the amount of light to the flash.
  • the amount of light in the lateral direction in the wide irradiation angle range can be improved, and the light uniformity can be remarkably improved in the photographing area of the wide angle camera. Accordingly, it is possible to overcome the disadvantage of darkening the edges of the photo when taking the photo.
  • the optical uniformity can be remarkably improved without using a separate optical system such as a lens or a reflector, there is no thickness and size limitation by the lens or the reflector.
  • the additional cost and process generation by the lens or the reflector is reduced, so that the economy is excellent and the design process is easy. Therefore, there is an advantage that can be usefully used in various portable electronic devices.
  • FIGS. 10 and 11 are perspective views and images of the LEDs for the camera flash according to the preferred embodiment of the present invention, respectively.
  • the LED for camera flash 110 of the present invention may include a base substrate 114, an LED chip 111, a color conversion layer 112, and a light blocking layer 113.
  • the base substrate 114 is a part constituting the bottom surface of the LED 110 for camera flash.
  • the base substrate 114 may be a printed circuit board (PCB).
  • the base substrate 114 may have conductive electrodes (not shown) printed on upper and lower surfaces thereof so that the LED chip 111 may be electrically connected or mounted on an external mounting substrate.
  • the base substrate 114 may be formed of a rigid PCB.
  • the base substrate 114 may be combined with the bottom surface of the color conversion layer 120.
  • the color conversion layer 112 may be coupled to at least a portion of the top surface of the base substrate 114, but preferably does not exceed the top surface of the base substrate 114 in the lateral direction.
  • the color conversion layer 112 is formed to completely cover the LED chip 111, and the bottom surface of the color conversion layer 112 and the base substrate 114 are coupled to each other.
  • the base substrate 114 may not be included.
  • Figure 13 is a cross-sectional view of the LED for the camera flash according to an embodiment of the present invention.
  • the camera flash LED 110 of the present invention may not include a base substrate 114.
  • the LED chip 111 is coupled to the top surface of the base substrate 114. Specifically, the LED chip 111 is electrically connected to the conductive electrode formed on the upper surface of the base substrate 114.
  • the LED chip 111 may emit blue light, but any LED chip commonly used in the art may be used without limitation.
  • the color conversion layer 112 is formed to encapsulate the LED chip 111.
  • the color conversion layer 112 may be formed to completely cover the LED chip 111 on the top surface of the base substrate 114.
  • the color conversion layer 112 may include a transparent or semi-transparent binder and phosphor.
  • the transparent or translucent binder is commonly used in the art, and a material capable of dispersing the phosphor in the binder to coat the LED chip 111 may be used.
  • the binder is silicone resin, polyester resin, acrylic resin, epoxy resin, urethane resin, nylon resin, polyamide resin, polyimide resin, vinyl chloride resin, polycarbonate resin, polyethylene resin, Teflon resin, polystyrene resin, poly It may be any one or more selected from the group consisting of propylene resin and polyolefin resin, and more preferably any one or more selected from the group consisting of silicone resin and epoxy resin.
  • the phosphor may be used a phosphor that can be mixed with blue light to produce white light or other desired color.
  • a red phosphor, a green phosphor, and a YAG-based phosphor Yttrium aluminum garnet, Y3Al5O12
  • YAG-based phosphor Yttrium aluminum garnet, Y3Al5O12
  • YAG-based phosphors have excellent thermal and chemical stability and unique optical and mechanical properties.
  • it in the case of doping with rare earth elements such as Nd and Eu, it has excellent thermal stability and luminance even in a high energy electron beam, and thus has an advantage of being useful as a phosphor for a display.
  • yellow light generated by the YAG-based phosphor may be mixed with blue light to generate white light.
  • the color conversion layer 112 may function to convert the wavelength of the blue light emitted by dispersing the phosphor in the vicinity of the LED chip 111. In addition, there is an effect to diffuse the light in order to improve the light extraction efficiency.
  • the light blocking layer 113 is formed on the upper surface of the color conversion layer 112.
  • the light blocking layer 113 may be formed only on the upper surface of the color conversion layer 112 and may not be formed to cover the side surface of the color conversion layer 112.
  • the light blocking layer 113 may include a resin material and a light blocking mixture uniformly dispersed in the resin material.
  • the resin material may be any one or more selected from the group consisting of silicone resins and epoxy resins.
  • the light blocking layer 113 may be formed in a state where the light blocking mixture is evenly dispersed. Accordingly, there is an effect that can effectively block the light emission in the upper direction of the LED through the upper surface of the color conversion layer 112.
  • the light-shielding mixture may be a material that is uniformly dispersed in the resin material and can effectively block light, and may be preferably TiO 2 (titanium dioxide).
  • TiO 2 has a high diffraction index and a UV blocking ability and can scatter not only ultraviolet rays but also visible rays. Accordingly, when the TiO 2 is uniformly dispersed in the organic or inorganic encapsulant, light scattering may be generated to block light emission toward the upper direction of the LED.
  • the light blocking layer 113 blocks the light emission toward the upper direction of the LED to a certain degree, and does not block the light emission toward the side of the LED to adjust the amount of light in the side direction. That is, by controlling the degree of light emission in the LED " ⁇ * and the lateral direction of the LED has the effect of controlling the amount of light in the lateral direction by adjusting the path of light.
  • the light blocking layer 113 may be opaque. Therefore, the color of the color conversion layer 112 positioned below the light blocking layer 113 does not pass through the light blocking layer 113, so that the color of the color conversion layer 112 is not exposed upward.
  • the color of the color conversion layer 112 may be determined by the type of phosphor. In the case of the YAG-based phosphor as described above, the color is yellow. When the color of the color conversion layer 112 is exposed to the outside, it may hinder the aesthetics of the electronic device in which the LED of the present invention is installed.
  • the light blocking layer 113 may block the color of the color conversion layer 112.
  • a colored layer may be additionally formed on the upper surface of the light blocking layer 113.
  • the colored layer may have the same or similar color as that of the periphery of the electronic device in which the LED for camera flash of the present invention is installed, thereby improving the aesthetics of the electronic device.
  • the LED of the present invention can control the blocking rate for light emission in the upper direction by adjusting the content of TiO 2 in the light blocking layer 113.
  • the content of TiO 2 contained in the light blocking layer 113 may be 1 to 70% by weight. That is, by adjusting the content of TiO 2 within the above range can provide a camera flash LED that the desired light blocking rate is expressed. Specifically, when more TiO 2 is included within the above range, the blocking rate for light emission toward the upper direction of the LED can be improved, and when less TiO 2 is included within the above range, It can lower the blocking rate for light emission.
  • the LED of the present invention may adjust the thickness of the light blocking layer 113 to adjust the blocking rate for light emission in the upper direction of the LED.
  • the thickness of the light blocking layer 113 may be 50 ⁇ 700 um. That is, by controlling the thickness of the light blocking layer 113 within the above range can provide a camera flash LED that the desired light blocking rate is expressed. Specifically, when the thickness of the light blocking layer 113 is thickened within the above range, the blocking rate against light emission may be improved, and when the thickness of the light blocking layer 113 is thinned within the above range, the light emitting is emitted. Can lower the blocking rate.
  • the above-described adjustment of the content of TiO 2 in the light blocking layer 113 and the thickness of the light blocking layer 113 may be controlled simultaneously or separately, and preferably, the content and light blocking of TiO 2 in the light blocking layer 113.
  • By simultaneously adjusting the thickness of the layer 113 may provide an LED for the camera flash for the device to be used.
  • the LED for the camera flash of the present invention controls the amount of light in a wide irradiation angle range only by performing a simple process of controlling the content of TiO 2 and the thickness of the light blocking layer 113 in the light blocking layer 130 during the manufacturing process. And can be improved. Accordingly, it is possible to remarkably improve the light uniformity in the entire photographing area without using a secondary optical system such as a lens or a reflector.
  • the LED having a low content of the blocking mixture in the light blocking layer of the LED may be arranged in the center compared to the LED having a high content of the blocking mixture in the light blocking layer.
  • the LED module is a thin LED light blocking thickness of the LED may be arranged in the center than the thick LED light blocking layer.
  • the amount of light irradiated in the front direction of the camera and the amount of light irradiated in the lateral direction become uniform, and the illuminance of the corner portion of the photographing area is constant compared to the center of the photographing area, thereby improving the light uniformity.
  • a transparent resin material layer 113 ′ may be formed on at least one side surface of the color conversion layer 112 exposed to the outside, and preferably, the color conversion layer.
  • the transparent resin material layer 113 ′ may be formed on all sides exposed to the outside of the 112.
  • FIG. 14 is a cross-sectional view of a LED for a camera flash further comprising a translucent resin material layer 113 ′ according to an exemplary embodiment of the present invention.
  • a translucent resin material layer 113 ′ according to an exemplary embodiment of the present invention.
  • the base substrate 114 may be coupled to the bottom surface of the color conversion layer 112.
  • the light blocking layer 113 is formed on the upper surface of the color conversion layer 112, wherein the transparent resin material layer 113 ′ is disposed on any one or all surfaces or all surfaces of the side exposed to the outside of the color conversion layer 112. This can be formed.
  • the transparent resin material layer 113 ′ may include any one or more selected from the group consisting of a silicone resin and an epoxy resin. This protects the LED side from the outside and at the same time has the effect of effectively adjusting the amount of light in the LED side direction.
  • Figure 15 is a light amount graph according to the irradiation angle of the conventional LED module for camera flash.
  • a conventional LED module for camera flash is used without a secondary optical system such as a reflector or a lens
  • the amount of light is considerably low in a wide irradiation angle range. Accordingly, the light distribution of the light emitted from the light emitting device is too wide compared to the photographing area of the camera, resulting in low light efficiency, and the peripheral illumination is too low compared to the center illuminance.
  • Figure 16 is a light amount graph according to the irradiation angle of the LED for the camera flash according to an embodiment of the present invention.
  • the light amount is improved in a wide irradiation angle range.
  • the difference in the amount of light in the entire irradiation angle range is only about 50 lx or less, so that the light uniformity in the entire photographing area is excellent.
  • the flash device of the present invention can control the flash light according to various shooting conditions at the time of camera shooting, thereby taking a picture of excellent quality in various atmospheres. Accordingly, the present invention can be utilized in a camera mounted on a portable electronic device such as a smart phone or a tablet computer, so that it is possible to take photographs with excellent image quality.

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Abstract

Un dispositif flash de la présente invention peut régler l'angle d'éclairage de la lumière flash pour correspondre à l'angle de vision d'un appareil photo en fonction de diverses conditions de capture d'image lors de la capture d'images à l'aide de l'appareil photo, et il est ainsi possible de prendre des photographies de haute qualité même dans des conditions de capture d'image sombres. En outre, le dispositif flash de la présente invention peut commander le motif de faisceau de lumière flash en fonction de la position ou de la distance de focalisation d'appareil photo, et peut ainsi être utilement appliqué à des appareils photo ayant une fonction de focalisation. De plus, le dispositif flash de la présente invention peut commander le motif de faisceau de lumière flash selon le mode flash, et il est ainsi possible de prendre des photographies ayant diverses atmosphères par la sélection du mode flash.
PCT/KR2019/006322 2018-07-13 2019-05-27 Dispositif flash Ceased WO2020013440A1 (fr)

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KR1020180081871A KR20200007589A (ko) 2018-07-13 2018-07-13 플래시 장치
KR10-2018-0081871 2018-07-13

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WO2020013440A1 true WO2020013440A1 (fr) 2020-01-16

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120046454A (ko) * 2010-11-02 2012-05-10 엘지이노텍 주식회사 발광소자 패키지, 이를 포함하는 백라이트 유닛 및 조명장치
KR20140089764A (ko) * 2013-01-07 2014-07-16 엘지이노텍 주식회사 발광 소자 패키지
JP2014530376A (ja) * 2011-09-13 2014-11-17 インテレクチュアル ベンチャーズ ファンド ８３ エルエルシー 可動部品を含まないズームフラッシュ
JP2015034850A (ja) * 2013-08-07 2015-02-19 オリンパス株式会社 撮影装置および撮影方法
KR20160074362A (ko) * 2014-12-18 2016-06-28 주식회사 토비스 광 조절 수단을 구비한 카메라 플래시 모듈

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160104786A (ko) 2015-02-26 2016-09-06 송인실 휴대폰 카메라용 led 플래시 모듈 및 그 제어방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120046454A (ko) * 2010-11-02 2012-05-10 엘지이노텍 주식회사 발광소자 패키지, 이를 포함하는 백라이트 유닛 및 조명장치
JP2014530376A (ja) * 2011-09-13 2014-11-17 インテレクチュアル ベンチャーズ ファンド ８３ エルエルシー 可動部品を含まないズームフラッシュ
KR20140089764A (ko) * 2013-01-07 2014-07-16 엘지이노텍 주식회사 발광 소자 패키지
JP2015034850A (ja) * 2013-08-07 2015-02-19 オリンパス株式会社 撮影装置および撮影方法
KR20160074362A (ko) * 2014-12-18 2016-06-28 주식회사 토비스 광 조절 수단을 구비한 카메라 플래시 모듈

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