Light Diffusion Lighting Apparatus for Photography Having Shadowless Effect

Abstract

The present invention relates to a lighting device for photography, and more specifically, to a diffuse light lighting device for photography having a shadowless effect capable of suppressing shadow generation by irradiating stereoscopic light from behind a subject. A diffuse light lighting device for photography having a shadowless effect according to an embodiment of the present invention is a diffuse light lighting device for photography comprising a rear light that irradiates light toward a camera from behind a subject, wherein the rear light comprises a rear lamp that irradiates light; a lighting box having an opening in a lighting window installed on the periphery of the rear lamp to reflect the light of the rear lamp to convert it into stereoscopic diffused light and emit the converted stereoscopic light to the rear of the subject; a light reflecting member installed on the inner surface of the internal space to reflect the light of the rear lamp within the internal space so that the light irradiated from the rear lamp becomes stereoscopic light; and a lighting diffuser plate installed in the lighting window to uniformly diffuse and emit the light reflected by the light reflecting member over the entire surface of the lighting window.

Description

Technology Field

[0001] The present invention relates to a lighting device for photography, and more specifically, to a diffused light lighting device for photography having a shadowless effect capable of suppressing shadow generation by irradiating stereoscopic light from behind a subject. Background Technology

[0002] In general photography, lighting is directed from the front or side to enhance the subject's three-dimensionality and obtain a sharp image. However, when the distance between the subject and the background is close or the lighting is strong, a persistent problem arises where harsh shadows form behind the subject, degrading photo quality. To address this, various attempts are being made to offset shadows, such as installing separate lighting in front of the background paper or utilizing the background itself as a light source.

[0003] To address this, prior art has been disclosed in Korean Registered Patent Publication No. 10-2598687, "a video recording background system capable of self-selecting a background image implemented with LED lighting and recording a video."

[0004] The above prior art allows a light output device to irradiate light toward a background image output plate according to a background image selected by a user, thereby forming a background image by illumination.

[0005] However, the above-mentioned conventional technology mainly uses planar light methods such as LCD or LED as background lighting, so light that is close to a straight line reaches the subject and the rear side directly illuminated by the light is bright, but the light cannot bend and enter the curved side of the subject or the opposite direction.

[0006] This gives the subject a flat appearance as if it is stuck to the background, and leaves unnatural shadows at the subject's edges.

[0007] In addition, conventionally, vignetting occurs where the edges of the light window become dark due to corners or structural limitations inside the lighting fixture, which disrupts the uniformity of background brightness and hinders the acquisition of high-quality shadowless images.

[0008] In addition, conventional photographic lighting emits intense light and heat instantaneously; however, there was a problem in that if fine dust adhered to light reflectors or light diffusers due to static electricity generated during this process, optical quality deteriorated and illuminance imbalances worsened. Prior art literature

[0009] (Patent Document 0001) KR 10-2598687 B1 The problem to be solved

[0010] The present invention has been devised to solve the aforementioned problems. The objective of the present invention is to overcome the limitations of planar surface light and provide a three-dimensional shadowless effect that softly envelops the subject by reflecting the light from a rear lamp at various angles through a light-reflecting member installed in the space inside the lighting box to convert it into three-dimensional light, and by uniformly diffusing it through a lighting diffuser plate installed in the lighting window.

[0011] In addition, the present invention aims to prevent overheating and deterioration of the device by installing a rear illumination controller in the rear lamp to secure optimal illumination suitable for the shooting environment, and by forming a heat dissipation hole in the lighting box to effectively dissipate heat generated from the lamp.

[0012] In addition, the present invention aims to maintain optical cleanliness by providing a height-adjustable support at the bottom of the lighting box to allow precise adjustment of the position of the lighting window according to the height of the subject, and by installing an electrostatic discharge device inside the lighting box to prevent foreign substances from adhering to the light-reflecting member or the lighting diffuser plate.

[0013] In addition, the present invention aims to provide a diffuse light illumination device for photography that has a shadowless effect, which fundamentally prevents the occurrence of shadows and maximizes exposure accuracy at the moment the shutter operates by equipping a front light that illuminates from the camera position and an illuminance synchronization device, and synchronizing the balance of front and rear light levels at the subject position in real time through an illuminance measurement sensor. means of solving the problem

[0014] A diffuse light lighting device for photography having a shadowless effect according to an embodiment of the present invention for achieving the above-mentioned objective is a diffuse light lighting device for photography comprising a rear light that irradiates light toward a camera from behind a subject, wherein the rear light comprises a rear lamp that irradiates light; a lighting box having an opening in a lighting window installed on the periphery of the rear lamp to reflect the light of the rear lamp to convert it into stereoscopic diffuse light and emit the converted stereoscopic light to the rear of the subject; a light reflecting member installed on the inner surface of the internal space of the lighting box to reflect the light of the rear lamp within the internal space so that the light irradiated from the rear lamp becomes stereoscopic light; and a lighting diffuser plate installed in the lighting window to uniformly diffuse and emit the light reflected by the light reflecting member across the entire surface of the lighting window.

[0015] The above rear lamp may include a rear illumination controller that controls the illumination level.

[0016] The above lighting box may include a heat dissipation hole for dissipating heat generated from the above rear lamp.

[0017] The above rear lighting may include a height-adjustable support that supports the lower part of the lighting box and adjusts the height of the lighting window.

[0018] The above rear lighting may include an electrostatic removal device that removes static electricity to prevent foreign substances caused by static electricity from adhering to the light reflector.

[0019] It may further include a front light that illuminates toward the subject from the position of the camera, and an illumination synchronization device that synchronizes the illumination of the front light and the rear light using the rear illumination controller so as to balance the light amounts of the front light and the rear light at the part where the subject is located. Effects of the invention

[0020] According to the present invention, a rear light is included that irradiates light toward a camera from behind a subject, and the light is converted into three-dimensional light through a light-reflecting member in the internal space of a lighting box in which a rear lamp is installed, and by uniformly diffusing it through a light-diffusing plate of a lighting window, the vignetting phenomenon that occurs in conventional flat surface light can be eliminated and a three-dimensional shadowless effect that envelops the subject can be achieved.

[0021] In addition, the present invention enables the formation of a customized light source according to the characteristics of the subject by precisely adjusting the optimal illumination level suitable for the shooting environment through a rear illumination controller installed in the rear lamp.

[0022] In addition, the present invention can effectively dissipate high heat generated from the rear lamp through the heat dissipation holes of the lighting box, thereby preventing deterioration of internal components and ensuring operational stability of the device.

[0023] In addition, the present invention allows for accurate alignment of the rear lighting regardless of the size or position of the subject through a height-adjustable stand that supports the lower part of the lighting box and adjusts the height of the lighting window, thereby maximizing shooting convenience.

[0024] In addition, the present invention prevents foreign substances from adhering to the light reflector and the lighting diffuser through an electrostatic removal device, thereby maintaining optical cleanliness regardless of temperature changes or humidity environments resulting from lamp operation and continuously providing stereoscopic light of a constant quality.

[0025] In addition, the present invention is equipped with a front light and an illumination synchronization device to synchronize the balance of light intensity in front and behind the subject in real time, thereby fundamentally blocking the occurrence of shadows even at the moment the shutter operates and enabling the acquisition of high-quality shadowless photographs. Brief explanation of the drawing

[0026] FIG. 1 is a schematic diagram of a diffuse light illumination device for photography having a shadowless effect according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a diffused light illumination device for photography having a shadowless effect according to an embodiment of the present invention. FIG. 3 is a front cross-sectional view of a rear light constituting a diffuse light illumination device for photography having a shadowless effect according to an embodiment of the present invention. FIG. 4 is a side cross-sectional view of a rear light constituting a diffuse light lighting device for photography having a shadowless effect according to an embodiment of the present invention. FIG. 5 is a side cross-sectional view illustrating another example of a height-adjustable stand constituting a diffused light lighting device for photography having a shadowless effect according to an embodiment of the present invention. Specific details for implementing the invention

[0027] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

[0028] As illustrated in FIGS. 1 to 3, a diffuse light illumination device (300) for photographing with a shadowless effect according to an embodiment of the present invention is a device that suppresses shadow generation by forming a light source toward a camera (200) from the back of a subject, and is configured to include a rear light (100), a front light (250), and a height-adjustable stand (150).

[0029] The rear light (100) irradiates light toward the subject from behind the subject, and the rear light (100) can illuminate the subject through stereoscopic light emission. The rear light (100) may include a rear lamp (120), a light box (110), a light reflector (130), and a light diffuser (113).

[0030] The rear lamp (120) can emit light in the form of a strobe or flash. The rear lamp (120) may be equipped with a rear illumination controller (121) for controlling the illumination by adjusting the intensity of the emitted light, and the rear lamp (120) may be a lamp that generates light by electricity, such as an LED, a xenon flash tube, or a halogen / tungsten lamp.

[0031] The lighting box (110) can convert the instantaneous light of the rear lamp (120) into three-dimensional light, and the lighting box (110) may have a three-dimensional shape (e.g., a cuboid) with an internal space formed therein, and the rear lamp (120) may be installed on the periphery of the lighting box (110).

[0032] Here, the perimeter surface where the rear lamp (120) is installed may be any one of the upper, lower, left, or right sides of the lighting box (110), or multiple rear lamps (120) may be installed on two or more sides, or two or more rear lamps (120) may be installed on one side.

[0033] In the lighting box (110), a lighting window (111) through which light from a rear lamp (120) is emitted may be formed on the surface facing the rear of the subject, and a light reflecting member (130) for reflecting the light from the rear lamp (120) three-dimensionally and converting it into three-dimensional light may be installed in the internal space of the lighting box (110).

[0034] Here, planar light, such as LCD or LED, can illuminate a subject from the front, but because the light reaches the subject in a nearly straight line, the back side illuminated by the light is bright, but the light cannot bend and enter through curved sides or in the opposite direction, giving the subject a flat appearance as if it is stuck to the background and causing shadows on the subject.

[0035] However, unlike planar light, stereoscopic light is light that is reflected three-dimensionally in an internal space with volume, so it is emitted through the lighting window (111) with numerous angles of incidence, and thus the light is softly wrapped around the silhouette of the subject, creating a sense of space as if the subject is popping out from the background, thereby minimizing shadows and highlighting the three-dimensionality.

[0036] Meanwhile, the light-reflecting member (130) may have a reflective surface capable of reflecting light, and the light-reflecting member (130) may be installed on the inner surface of the internal space without any empty parts. The light-reflecting member (130) may be in the form of coating a reflective surface on glass or synthetic resin, forming a reflective surface by spinning or anodizing aluminum, or being formed from a PC or ABS material having a high reflectivity surface.

[0037] And when the lighting box (110) is viewed from the front, each corner of the interior space is formed with a curved surface (131) so that no corners occur, thereby eliminating the corners of the light reflecting member (130), or only the light reflecting member (130) located at each corner in the interior space is formed with a curved surface (131) so that the corners are eliminated.

[0038] When a corner occurs in the light-reflecting member (130), the light cannot be reflected at the corner and is extinguished, causing a vignetting phenomenon in which the four corners of the lighting window (111) become dark. Therefore, in the present invention, the corner of the light-reflecting member (130) is curved to prevent the extinguishing of light and thus prevent the vignetting phenomenon.

[0039] A light diffuser plate (113) may be installed in the light window (111) so as to emit light with uniform illumination over the entire surface of the light window (111).

[0040] The light diffuser plate (113) can finely scatter light to prevent a difference in brightness between the area near and far from the rear lamp (120), thereby uniformly adjusting the brightness of the entire light window (111). For example, the light diffuser plate (113) may be composed of a milky white light-diffusing polycarbonate (PC) plate with a light transmittance of 70% or more, and a fine embossed pattern may be formed on the surface to induce diffuse reflection of incident three-dimensional light. This can perform the function of redistributing the directionality of light induced inside the light box (110) in all directions to soften the shadow boundaries around the subject.

[0041] A heat dissipation hole (115) may be formed through the lighting box (110) to dissipate heat generated from the rear lamp (120), and a light reflecting member (130) having a larger circumference than the heat dissipation hole (115) may be installed spaced apart from the heat dissipation hole (115) to cover the area directly below or directly above the heat dissipation hole (115) in the part where the heat dissipation hole (115) is formed, in order to minimize the leakage of reflected light to the outside.

[0042] Meanwhile, an electrostatic removal device (117) may be installed in the lighting box (110) to prevent the occurrence of an uneven illumination level caused by foreign substances, such as dust, adhering to the light reflecting member (130) or the lighting diffuser plate (113) due to static electricity. It is preferable that the electrostatic removal device (117) be implemented as an ionizer capable of independently controlling static electricity even in a low-relative-humidity environment caused by the rise in internal temperature due to the operation of the rear lamp (120). This prevents condensation on the lighting diffuser plate (113) or corrosion of the light reflecting member (130) or the lighting diffuser plate (113) that may occur in a high-humidity environment, while simultaneously maintaining optical cleanliness in real time to ensure uniformity of the three-dimensional light.

[0043] In addition, an electrostatic removal device (117) may be installed in the heat dissipation hole (115) of the lighting box (110), and in the heat dissipation hole (115) where the electrostatic removal device (117) is not installed, a foreign matter removal fan (not shown) may be installed to exhaust foreign matter floating in a state where electrostatic charge has been removed, and the foreign matter removal fan may not only discharge foreign matter by wind, but also perform the function of preventing overheating by forcibly exhausting heat from the rear lamp (120).

[0044] A height-adjustable support (150) may be installed at the bottom of the lighting box (110), and the height-adjustable support (150) can adjust the height of the lighting box (110) according to the height to adjust the position of the lighting window (111).

[0045] As illustrated in FIG. 5, in another example of a height-adjustable base (150'), a lifting mechanism (151) driven by a motor or hydraulics is installed inside to adjust the height of the lighting box (110), thereby allowing the height of the lighting window (111) to be adjusted according to the height of the subject. A positioning base (153) can be installed in the height-adjustable base (150) to position the subject at a constant distance from the lighting window (111).

[0046] Here, since the brightness of the light illuminating the subject may change when the distance between the light window (111) and the subject changes, the distance between the light window (111) and the subject is maintained through the positioning base (153), thereby providing uniform brightness to the subject even when re-shooting.

[0047] The positioning base (153) may be in the form of a stand on which an object can be placed, or in the form of a chair if the object is a person, and the positioning base (153) may be formed integrally with the height-adjustable stand (150) and may be configured to be foldable on the height-adjustable stand (150) so as to be folded or unfolded as needed.

[0048] As illustrated in FIG. 1, the diffuse light illumination device (300) for photographing a shadowless effect according to the present invention may further include a front light (250) and an illumination synchronization device (170). The front light (250) may illuminate the subject from the front of the subject where the camera (200) is located, and the front light (250) may include a front lamp (251) that emits light and a reflector (255).

[0049] The front lamp (251) can emit light in the form of instantaneous light, just like the rear lamp (120), and the reflector (255) can reflect the light from the front lamp (251) to provide it to the subject in the form of indirect light.

[0050] The front lamp (251) illuminates toward the reflector (255), and the light reflected by the reflector (255) can be provided to the subject, and the reflector (255) can be implemented as various known types of reflectors used for photography. A front light control device for adjusting the illumination level may also be installed in the front lamp (251).

[0051] The illumination synchronization device (170) can synchronize the operation so that the illumination and the timing of light emission of the front lamp (251) and the rear lamp (120) are the same.

[0052] The illuminance synchronization device (170) may be installed in any one of the camera (200), the front light (250), or the rear light (100). The illuminance synchronization device (170) measures the illuminance of the front lamp (251) using an illuminance measurement sensor (175) and can adjust the illuminance of the rear lamp (120) to emit light at the same illuminance as the front lamp (251) using a rear illuminance controller (121).

[0053] The illuminance measuring sensor (175) is installed on the positioning base (153) where the subject is located, so that the illuminance of the front lamp (251) and the rear lamp (120) is synchronized in advance before the subject is photographed, and then the subject is placed on the positioning base (153) and photographed, thereby synchronizing the illuminance at the position of the subject and preventing shadows from forming on the subject.

[0054] The illuminance measuring sensor (175) is installed on a height-adjustable bar, such as an antenna, on the positioning base (153), so that the illuminance measuring sensor (175) can be positioned at the exact height at which the subject is to be photographed, thereby measuring the illuminance at the subject's shooting position. Of course, the illuminance synchronization device (170) is also synchronized with the shutter of the camera (200), so that the front light (250) and the rear light (100) can operate simultaneously when the shutter is operated.

[0056] We will now explain the interactions and effects between each component described above.

[0057] The diffuse light illumination device (300) for photographing with a shadowless effect according to the present invention organically synchronizes the front light (250) and the rear light (100) when the shutter of the camera (200) is operated, thereby three-dimensionally canceling out shadows around the subject.

[0058] When the front light (250) emits light, the light intensity measuring sensor (175) of the light intensity synchronization device (170) detects the light intensity of the front lamp (251) in real time and transmits it to the rear light intensity controller (121), and the rear light intensity controller (121) controls the rear lamp (120) to emit light with the same light intensity as the front lamp (251), thereby precisely maintaining light intensity balance at the subject position.

[0059] Meanwhile, the instantaneous light emitted from the rear lamp (120) is radiated into the internal space of the lighting box (110) and then diffusely reflected at various angles by a light-reflecting member (130) that includes a cut spherical structure and a curved edge (131). In this process, the light is converted into three-dimensional light with depth, and unlike planar light that is close to a straight line, the three-dimensional light produces a wrapping effect that gently wraps around the silhouette of the subject.

[0060] In particular, when light is reflected inside the light box (110), the corners of the light reflector (130) are treated as curved surfaces (131) to prevent vignetting caused by the extinction of light, and by redistributing directional light in all directions through the light diffuser plate (113) to soften the shadow boundaries provided to the subject, a sense of space is formed in which the subject stands out from the background.

[0061] In addition, the ionizer, which is an electrostatic removal device (117) for removing foreign substances inside the lighting box (110), actively neutralizes static electricity even in an internal environment that has become dry due to the operation of the rear lamp (120), thereby preventing foreign substances from adhering to the light reflecting member (130) and the lighting diffuser plate (113). At the same time, the foreign substance removal fan forcibly exhausts floating foreign substances and the heat from the rear lamp (120) to the outside through the heat dissipation hole (115), thereby preserving optical cleanliness and the durability of the device.

[0062] And the user finely adjusts the height of the lighting box (110) through a hydraulic or electric lifting mechanism (151) built into the height-adjusting base (150), and maintains a constant distance between the subject and the lighting window (111) through the positioning base (153), thereby ensuring uniform shadow-free quality even during re-shooting.

[0064] Accordingly, the diffuse light lighting device (300) for photographing a shadowless effect according to the present invention can achieve a shadowless effect by converting the light from a rear lamp (120) into three-dimensional light through a lighting box (110) in which a light reflecting member (130) is installed inside, and by diffusing it uniformly through a lighting diffuser plate (113), thereby providing three-dimensional light that surrounds the subject.

[0065] In addition, the present invention has a rear illumination controller (121) installed in the rear lamp (120) to adjust the illumination of the rear light (100) in accordance with the front light (250), thereby minimizing the occurrence of shadows.

[0066] In addition, the present invention can effectively discharge high heat generated during light emission through a heat dissipation hole (115) formed in a lighting box (110) to prevent overheating of the device, and can maintain a constant illumination balance by blocking the adsorption of foreign substances on the optical element regardless of humidity changes through an ionizer, which is an electrostatic removal device.

[0067] In addition, the present invention allows the height of the lighting box (110) to be adjusted according to the height of the subject through the height-adjustable base (150), and the height of the lighting box (110) can be easily and precisely adjusted by installing a lifting mechanism (151) on the height-adjustable base (150).

[0068] In addition, the present invention can maximize the consistency of shooting data and the efficiency of the work by configuring a positioning base (153) on a height-adjustable base (150) to standardize the distance between the lighting window (111) and the subject.

[0069] In addition, the present invention can prevent foreign substances from adhering to the inside of the lighting box (110) due to static electricity generation through an electrostatic removal device, thereby preventing uneven illumination of the light reflecting member (130) and the lighting diffuser plate (113).

[0070] In addition, the present invention can achieve a shadowless effect by synchronizing the rear lamp (120) with the light intensity of the front light (250) in real time through the light intensity synchronization device (170) and the light intensity measurement sensor (175), thereby achieving a balance of light intensity between the front and rear at the subject's position.

[0072] Although embodiments of the present invention have been described above, the scope of the present invention is not limited thereto and includes all changes and modifications within the scope recognized as equivalents that can be easily changed by a person skilled in the art from the embodiments of the present invention. Explanation of the symbols

[0073] 100: Rear lighting 110: Lighting box 111: Lighting window 113: Lighting diffuser 115: Heat dissipation hole 120: Rear lamp 121: Rear illumination controller 130: Light reflector 131: Curved surface 150,150': Height-adjustable stand 151: Elevator mechanism 153: Positioning base 170: Illuminance Synchronizer 175: Illuminance Measurement Sensor 200: Camera 250: Front light 251: Front lamp 255: Reflector 300: Diffused light lighting device for photography

Claims

Claim 1 A photographic diffuse light lighting device comprising a rear light that illuminates a camera from behind a subject, wherein the rear light comprises a rear lamp that illuminates light; a lighting box having an opening in a lighting window installed on the periphery of the rear lamp to reflect the light of the rear lamp, convert it into stereoscopic diffuse light, and emit the converted stereoscopic light to the rear of the subject; a light reflecting member installed on the inner surface of the interior space of the lighting box to reflect the light of the rear lamp within the interior space so that the light illuminated by the rear lamp becomes stereoscopic light; and a lighting diffuser plate installed in the lighting window to uniformly diffuse and emit the light reflected by the light reflecting member across the entire surface of the lighting window, wherein the light reflecting member is installed entirely on the inner surface of the interior space to reflect the light illuminated by the rear lamp three-dimensionally at multiple angles within the interior space and convert it into stereoscopic light having multiple angles of incidence, and wherein the portion of the light reflecting member located at each corner of the interior space is formed as a curved surface to prevent vignetting caused by light extinction at the corners. A diffused light lighting device for photography that has an effect. Claim 2 A diffused light lighting device for photography having a shadowless effect, characterized in that, in claim 1, the rear lamp includes a rear illumination controller for adjusting illumination intensity. Claim 3 A photographic diffuse light lighting device having a shadowless effect, characterized in that, in claim 1, the lighting box includes a heat dissipation hole for dissipating heat generated from the rear lamp. Claim 4 A photographic diffuse light lighting device having a shadowless effect, characterized in that, in claim 1, the rear lighting includes a height-adjustable support that supports the lower part of the lighting box and adjusts the height of the lighting window. Claim 5 A photographic diffuse light lighting device having a shadowless effect, characterized in that, in claim 1, the rear lighting includes an electrostatic removal device that removes static electricity to prevent foreign substances caused by static electricity from adhering to the light reflector. Claim 6 A diffuse light illumination device for photographing with a shadowless effect, characterized in that, in paragraph 2, it further comprises a front light that illuminates toward the subject from the position of the camera, and an illumination synchronization device that synchronizes the illumination of the front light and the rear light using the rear illumination controller so as to balance the light amounts of the front light and the rear light at the part where the subject is located.

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