WO2017209320A1

WO2017209320A1 - Light irradiation angle variable strobe

Info

Publication number: WO2017209320A1
Application number: PCT/KR2016/005742
Authority: WO
Inventors: 문두재
Original assignee: (주)엘에스웨이브; 문두재
Priority date: 2016-05-30
Filing date: 2016-05-31
Publication date: 2017-12-07
Also published as: KR101767539B1

Abstract

The present invention relates to a studio strobe capable of controlling a shadow through light area modulation with folded angles of stick-shaped LED modules which are arranged in a form of umbrella ribs to allow for angle variation. The studio strobe comprises: a plurality of stick-shaped support parts which are hinged to be spread and folded in a form of umbrella ribs with respect to a center point thereof at adjustable angles; LED modules having LED chips arranged at predetermined gaps on a plane in which the stick-shaped support parts face each other when being folded; a diffusing plate, disposed on the front of the modules having the LED chips arranged therein, for diffusing light; an angle adjustment part for mechanically adjusting spreading and folding angles of the plurality of stick-shaped support parts; and a power supply part for supplying power to the LED modules through the stick-shaped support parts; and a center body part which is disposed at the center point to hinge one end portion of each of the plurality of stick-shaped support parts and has a passage of a line for power supplied from the power supply part and the angle adjustment part.

Description

Light irradiation angle variable strobe

The present invention relates to a studio strobe, and more particularly, to arrange a rod-shaped LED module in an umbrella shape with an angle change, the studio capable of controlling a shadow according to a variable light area according to the angle of the umbrella shape facing each other. It's about Strobe.

Strobe is a device that illuminates a shooting scene by generating a momentary flash, and refers to a device that illuminates a subject or its surroundings when shooting a camera. It is generally used to lighten the scene momentarily at low light levels, but is generally used to lighten the relative dark areas within a certain distance. The strobe is short in duration and the color temperature is close to 5500K, which is the solar color temperature during the day. The light quantity and light quality are uniform, and can be used repeatedly.

Types of strobes are often referred to as hot-shoe strobes because they have a built-in strobe built into small digital cameras and a mounting pedestal that slides into a hot-shoe on the camera. Clip on type strobes, hand-mounted strobes with built-in battery packs, and studio strobes that connect to a separate power pack or power source.

In the prior art, a parabolic reflection mirror was used to make the strobe light more intense and to give a volume and a three-dimensional effect to the lighted object. However, the parabolic shape of the mirror reflects a problem that it is difficult to obtain sufficient brightness to eliminate shadows.

In order to solve such a problem, US Patent US8376560 "Collapsed parabola light reflecting umbrella apparatus" discloses a technology that can increase the reflection efficiency is composed of a three-dimensional folded surface of the inner reflecting surface. However, there is a limit that it is difficult to solve the problem of removing the shadowing area only with the reflection structure as described above.

[Preceding technical literature]

[Patent Documents]

Prior Art 1: US Patent US8376560 (Collapsed parabola light reflecting umbrella apparatus)

The present invention has been proposed to solve the above-mentioned problems, the LED module itself is arranged in a bar shape so as to emit intense light, the folding umbrella shape that can fold the bar module based on the center The purpose is to provide a light irradiation angle variable studio strobe that can increase the condensing effect according to the angle of the shape of the umbrella facing each other.

The present invention, a plurality of rod-shaped support that is folded to fold and fold in the shape of an umbrella with respect to the center point, and can adjust the angle of folding and folding; An LED module in which LED chips are arranged at predetermined intervals on surfaces facing each other when the rod-shaped supports are folded; A diffusion plate positioned in front of the module where the LED chips are arranged to diffuse light; An angle adjusting unit for mechanically adjusting an extension and folding angle of the plurality of rod-shaped supports; A power supply unit supplying power to the LED module through the rod-shaped support unit; And a central body part positioned at the center point to fold one terminal part of each of the plurality of rod-shaped support parts, and having a central body part having a passage of an electric power line supplied from the angle adjusting part and the power supply part. .

The present invention also provides a variable irradiation angle strobe, the central body portion further comprises a reflector (reflector) surrounding the plurality of rod-shaped support on the back side of each other facing each other.

The present invention also provides a light irradiation angle variable strobe, the spreading and folding angle ranges from 0 degrees to 180 degrees with respect to the angle formed by the facing surfaces.

The present invention also provides a light irradiation angle-variable strobe having the fixing portion that can be fixed at a predetermined angle.

The present invention further provides that the predetermined angle is 0 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, 150 degrees and 180 degrees on the basis of the angle formed by the surfaces facing each other. Variable angle strobe is provided.

The present invention also provides a light irradiation angle-variable strobe with a hole formed between the chip and the chip of the LED module, the hole is plated with copper, aluminum, ceramic, or silver for thermal conduction.

The present invention also provides a power supply unit comprising: a capacitor unit for accumulating charge for flash discharge; And a controller for controlling lighting of the LED module by synchronizing with the photographing of the camera, wherein the controller comprises: a continuous power controller controlling power supply so that the LED module maintains continuous light; A charge accumulation control unit configured to control the LED module to accumulate charges capable of flashing; And it provides a light irradiation angle variable strobe comprising a discharge control unit for controlling the discharge so that the LED module flashes.

The present invention also provides a control unit comprising: an amount of light for adjusting the amount of light of the continuous light and the flash of the LED module; It includes a temperature sensor for measuring the temperature of the LED module, the temperature sensor provides a light irradiation angle variable strobe to cut off the power supplied to the continuous light or the flash when the temperature of the module exceeds a predetermined reference value. .

The present invention also provides a variable light irradiation angle strobe, wherein the control unit includes a light amount volume for adjusting the color temperature and the light amount of the LED module, respectively.

The stroboscope of the present invention is arranged in the shape of a folding and folding LED module itself, so that the light source is irradiated in three dimensions instead of a simple plane, it is possible to express a very soft light, and the umbrella-shaped module is foldable Therefore, the light area is variable according to the angle of the umbrella shape, so the shadow can be controlled accordingly, and the texture expression power can be maximized by utilizing the shadow gradation effect from the irradiation of a plurality of light sources.

1 is a front view of a light irradiation angle variable strobe according to an embodiment of the present invention.

Figure 2 is a rear view of the light irradiation angle variable strobe according to an embodiment of the present invention.

3 is a side view of the light irradiation angle variable strobe according to an embodiment of the present invention.

4 is a schematic diagram showing an LED chip located on a printed circuit board.

5 is a schematic diagram showing the arrangement of the LED module according to an embodiment of the present invention.

6 is a photograph of the side and the back when the angle formed by the mutually opposing faces of the light irradiation angle variable strobe is 0 degrees.

7 is a photograph of the side and the back when the angle formed by the mutually opposing faces of the light irradiation angle variable strobe is 30 degrees.

8 is a photograph of the side and the back when the angle formed by the mutually opposing faces of the light irradiation angle variable strobe is 60 degrees.

9 is a photograph of the side and the back when the angle formed by the mutually opposing faces of the light irradiation angle variable strobe is 90 degrees.

10 is a photograph of the side and back when the angle formed by the sides of the side parabola strobe facing each other is 180 degrees.

11 is a schematic diagram briefly showing the effect of the shadow according to the area of the light source.

12 is a block diagram showing a configuration of a controller for controlling an LED module applied to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. This example is illustrative and does not limit the invention in any way.

The spatially relative terms "front", "back", "side", etc. may be used to easily describe the correlation of one element or component with another element or components as shown in the figures. Can be. Spatially relative terms are to be understood as terms that include different directions of the device in use or operation in addition to the directions shown in the figures. For example, when flipping the member shown in the figure, a member described as "below" or "below" of another member may be placed "above" of the other member. Thus, the exemplary term "below" can encompass both an orientation of above and below. The member can also be oriented in other directions, so that spatially relative terms can be interpreted according to the orientation. For example, the "landscape direction" may also be interpreted as "up and down direction", but is not limited thereto.

In the drawings, the thickness or size of each member is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size and area of each component do not fully reflect the actual size or area.

In addition, the angle and direction mentioned in the process of demonstrating the structure of this invention in the Example are based on what was described in drawing. In the description of the structure constituting the present invention in the specification, if the reference point and the positional relationship with respect to the angle is not clearly mentioned, reference is made to related drawings.

1 is a front view of a light irradiation angle variable strobe 10 according to an embodiment of the present invention, Figure 2 is a rear view of a light irradiation angle variable strobe 10 according to an embodiment of the present invention, Figure 3 Side view of the light irradiation angle variable strobe 10 according to an embodiment of the present invention.

The variable irradiation angle strobe according to an embodiment of the present invention, the central body portion 10, the rod-shaped support portion 20, the LED module 30, the diffusion plate 40, the angle adjuster (not shown), and the power supply portion (Not shown). According to another embodiment of the present invention, the light irradiation angle variable strobe is provided with a central body portion 10, a rod-shaped support portion 20, a reflector (not shown), an LED module 30, a diffusion plate 40, An angle adjuster (not shown), and a power supply (not shown). The central body part is located at a center point and folds one terminal part of each of the plurality of rod-shaped support parts, and includes a path of a power line supplied from the angle adjusting part and the power supply part.

Rod-shaped support portion 20 is arranged in an umbrella shape symmetrical with respect to the center portion is configured in such a form that can adjust the folding angle so that one surface formed with the LED module away or close to each other, shown in Figures 1 and 2 As described above, in one embodiment of the present invention, the rod-shaped support 20 is 20, but the number is not limited.

In one embodiment of the present invention, the LED module 30 is 8,800 LED chips 31 are arranged at a predetermined interval on the surface of the one surface in the folding direction of the rod-shaped support 20, but the number is limited It is not. In the present invention, when a forward voltage is applied to a semiconductor of a specific element, an LED (Light-Emitting Diode, hereinafter referred to as 'LED'), recombines with each other while electrons and holes move in a positive-negative junction. It refers to a device that emits light due to the difference in energy generated in the process. The color of the light emitted by the LED creates a wavelength depending on the composition of the semiconductor chip components, and the wavelength determines the color of the light. Aluminum Gallium Indium Phosphide (AlGaInP) chip, which is mainly used for high brightness LED, is manufactured from red to amber, and Inos Gallium Nitride (InGaN) chip uses Phosphor technology on Blue, Green and Blue chips to make white LED. Since the LED light has high light conversion efficiency, power consumption is very low, and the LED light can be miniaturized, thinned, and lightweight. In addition, since the service life is long and the thermal discharge is not performed, the preheating time is unnecessary, and the lighting and extinguishing speed is very fast.

The LED chip 31 may use a chip of high brightness and may use a monochromatic light LED capable of emitting light of various colors. Here, the monochromatic light LED is an LED in which R (red), G (green), and B (blue) elements emit three primary colors of light, and may emit various colors including white light. When producing white light, the most common method is to produce white light by using the fluorescent material lens on the LED device that emits monochromatic light, rather than combining the three primary colors of light, and the LED chip having the fluorescent material lens is usually used. It is called a high color rendering white light LED chip. LED strobes having a color temperature variable function may be implemented by combining LEDs having different color temperatures.

4 is a schematic diagram showing the LED chip 31 located on the printed circuit board 71. As shown in FIG. As shown in FIG. 4, in one embodiment of the present invention, a hole 32 is formed between the chip 31 and the chip of the LED module, and the hole 32 is formed of copper, which is a high thermal conductive material 70 for thermal conductivity. When the air passes through the aluminum, ceramic, or silver plated, the narrow hole 32 accelerates the air flow, and the plating material on the wall surface of the hole 32 may take away heat from the surface to maximize cooling efficiency.

5 is a layout view of the LED module 30 according to an embodiment of the present invention. As shown in FIG. 5 (b), a diffusion plate 40 is positioned at the front of the module in which the LED chip 31 is arranged, and the diffusion plate 40 is disposed at the front of the LED module 30 so that the LED module is disposed. While protecting the 30, the light emitted from the LED module 30 may be diffused.

6 to 10 is a photograph of the side and the back according to the angle formed by the mutually opposite surfaces of the light irradiation angle variable strobe 10. The angles formed by the surfaces facing each other are shown in the form of 0 degrees, FIG. 7 is 30 degrees, FIG. 8 is 60 degrees, FIG. 9 is 90 degrees, and FIG. 10 is 180 degrees. Angle adjustment unit according to an embodiment of the present invention can mechanically adjust the folding angle of the plurality of rod-shaped support portion 20, as shown in Figures 6 to 10 the angle of the two umbrella ribs face each other Can vary from 0 degrees to 180 degrees. In one embodiment of the present invention, the plurality of umbrellas may be designed to be connected to each other by being connected to an angle adjusting unit provided in the central body part with a link to each other. In the light irradiation angle variable strobe 10 of the present invention, the LED module 30 itself is arranged in a parabolic umbrella shape so that the light source is irradiated in three dimensions instead of a simple plane, and thus very soft light expression is possible. As shown in the above, the shadow can be controlled according to the variable light area according to the parabola angle. As the angle of the umbrella is closer to 180 degrees, the area of the light source becomes larger and the shadow becomes softer, so that the texture expression power can be maximized by the gradient effect of the shadow. have.

In one embodiment of the present invention, the angle adjusting unit may include a fixing part that can be fixed at a predetermined angle to enable stable operation at an angle that is frequently used. It also makes it easy to find specific angle values. In one embodiment of the present invention, the predetermined angle is set to 0 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, 150 degrees and 180 degrees based on the angle formed by the surfaces facing each other The angle value can be easily found and fixed mechanically. In one embodiment of the present invention, the angle adjuster may be electrically controlled and enable angle memory through a semiconductor or an electric circuit.

The power supply unit supplies power to the LED module 30 through the rod-shaped support unit 20, and controls the lighting of the LED module 30 by synchronizing with the capturing of the capacitor unit and the camera that accumulate the charge for flash discharge. (60). In one embodiment of the present invention, the passage of the power line supplied from the power supply unit is provided in the central body portion.

12 is a block diagram showing the configuration of the controller 60 for controlling the LED module 30 applied to the embodiment of the present invention. The control unit 60 may be installed on the outer surface of the strobe 10 or may be separately installed. In one embodiment of the present invention, the control unit 60 controls the lighting of the continuous light and / or flash of the LED module 30 in synchronization with the shooting of the camera. In one embodiment of the present invention, the controller 60 includes a continuous power controller 61, a charge accumulation controller 62, a discharge controller 63, and a lighting controller 64.

The continuous power supply control unit 61 may control the power supply and the lighting control unit 64 so that the LED module 30 emits light of general brightness instead of flashing. The continuous power control unit 61 may control the voltage supplied from the battery or the commercial power to be constant voltage or constant current.

The charge accumulation control unit 62 controls to accumulate the charge supplied from the power supply unit in the capacitor, and controls the charge accumulation amount under the control of the lighting control unit 64. The discharge controller 63 may discharge power charged and tuned at the time of camera shooting. The power controlled to be discharged by the discharge controller 63 is combined with the power controlled by the sustained power controller 61 so that a large current is instantaneously supplied to the LED module 30 at the time of photographing so as to light up with a large amount of light. In one embodiment of the present invention, as the switching element of the discharge control unit 63, transistors BJT, FET, IGBT, thyristor, triac, and the like may be used.

The lighting controller 64 may control a power connection including turning on and off the continuous power controller 61, the charge accumulation controller 62, and the discharge controller 63.

On the other hand, although not shown in Figure 12, the control unit 60 includes a light volume for adjusting the amount of light of the continuous light and the flash of the LED module 30, and a temperature sensor for measuring the temperature of the LED module 30, The temperature sensor cuts off the power supplied to the continuous light or the flash when the temperature of the module exceeds a predetermined reference value. In addition, the control unit 60 according to an embodiment of the present invention may further include a light volume for adjusting the color temperature and the light amount of the LED module 30 in case the separate adjustment of the color temperature and the light amount is required. .

In another embodiment of the present invention is provided with a reflector (reflector) is provided in the body portion or detachably connected to the body portion. The reflector may be used as long as it is used in the strobe of the prior art, and surrounds the plurality of rod-shaped supports on the rear side of each other facing each other, and increases the amount of light irradiated by the strobe and focuses to increase efficiency. do.

As described above, the best embodiment has been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

[Description of the code]

10: center body portion 20: rod-shaped support portion

30: LED module 31: LED chip

32: hole 40: diffuser plate

60: control unit 61: continuous power control unit

62: charge storage control unit 63: discharge control unit

64: lighting control unit 70: high thermal conductivity material

71: printed circuit board

Claims

A plurality of rod-shaped support parts which are folded to be folded and folded in an umbrella shape based on a center point, and which are capable of adjusting the folding and folding angles;

An LED module in which LED chips are arranged at predetermined intervals on surfaces facing each other when the rod-shaped supports are folded;

A diffusion plate positioned in front of the module where the LED chips are arranged to diffuse light;

An angle adjusting unit for mechanically adjusting an extension and folding angle of the plurality of rod-shaped supports;

A power supply unit supplying power to the LED module through the rod-shaped support unit; And

Located at the center point and folds one terminal of each of the plurality of bar-shaped support portion, and including a central body portion having a passage of the power line supplied from the angle adjuster and the power supply,

Light angle variable strobe.
The method of claim 1,

The central body portion further includes a reflector surrounding the plurality of rod-shaped supports on the rear side of the surface facing each other,

Light angle variable strobe.
The method of claim 1,

The extending and folding angle is in the range of 0 to 180 degrees based on the angle formed by the surfaces facing each other,

Light angle variable strobe.
The method of claim 1,

The angle adjustment unit, provided with a fixing portion that can be fixed at a predetermined angle,

Light angle variable strobe.
The method of claim 4, wherein

The predetermined angle is,

0 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 135 degrees, 150 degrees and 180 degrees based on the angle formed by the surfaces facing each other,

Light angle variable strobe.
The method of claim 1,

A hole is formed between the chip and the chip of the LED module,

The hole is plated with copper, aluminum, ceramic, or silver for heat conduction,

Light angle variable strobe.
The method of claim 1,

The power supply unit includes a capacitor unit that accumulates charges for flash discharge; And

A control unit for controlling the lighting of the LED module in synchronization with the shooting of the camera,

The control unit, the continuous power control unit for controlling the power supply so that the LED module maintains the continuous light;

A charge accumulation control unit configured to control the LED module to accumulate charges capable of flashing; And

It includes a discharge control unit for controlling the discharge so that the LED module flashes,

Light angle variable strobe.
The method of claim 7, wherein

The control unit may include: a volume of light for respectively adjusting the amount of light of the continuous light and the flash of the LED module;

It includes a temperature sensor for measuring the temperature of the LED module,

The temperature sensor cuts off the power supplied to the continuous light or the flash when the temperature of the module exceeds a predetermined reference value,

Light angle variable strobe.
The method of claim 7, wherein

The control unit includes a light amount volume for adjusting the color temperature and the amount of light of the LED module, respectively,

Light angle variable strobe.