KR102191441B1 - Wireless synchronization control system of lighting for photo shooting using smart phone - Google Patents

Abstract

Disclosed is a wireless synchronization control system for an image photographing lighting using a smartphone capable of automatically controlling operation of the smartphone and an external lighting arranged around the smartphone to provide an optimal lighting environment when a picture is photographed with the smartphone. To this end, according to the present invention, the wireless synchronization control system comprises: a main lighting device emitting light toward a subject in accordance with a lighting synchronization signal inputted from the outside; a receiver connected to the main lighting device and receiving a lighting synchronization signal transmitted toward the main lighting device and providing the same to the main lighting device; and the smartphone. The smartphone comprises: an input module receiving a photographing request signal from a user; a communication module transmitting the lighting synchronization signal to the receiver; a camera module photographing an image of the subject; and a picture photographing application installed therein to detect the photographing request signal input through the input module to generate and provide a camera synchronization signal to the camera module, and transmit the lighting synchronization signal to the receiver through the communication module. Accordingly, the external lighting is synchronized with the smartphone, thereby being capable of replacing an expensive professional camera with a smartphone even for a commercial picture.

Description

Wireless synchronization control system of lighting for video shooting using a smartphone {WIRELESS SYNCHRONIZATION CONTROL SYSTEM OF LIGHTING FOR PHOTO SHOOTING USING SMART PHONE}

The present invention relates to a wireless tuning control system of lighting for video shooting that can implement a lighting environment suitable for taking pictures using a smartphone, and more particularly, it is possible to provide an optimal lighting environment when taking a picture using a smartphone. The present invention relates to a wireless synchronization control system for lighting for video shooting using a smartphone that can automatically control the operation of a smartphone and external lighting arranged around the smartphone.

In general, the most important factor in shooting still pictures (still images) or moving pictures is light. As it is said that photography is an art of light, photography is possible only when there is light, and by using a variety of changing light, the photographer can effectively express the subject according to his intention. That is, the same subject can be expressed in various ways depending on the brightness of light, the angle of incidence, and color temperature. In particular, the brightness of the light has the most important effect on taking a picture.

In this way, the amount of light incident on the most important photographing device when photographing or moving pictures is controlled using the aperture and shutter speed. In situations where the adjustment by aperture and shutter speed is not sufficient, especially in dark situations where there is not enough light, the ISO value is adjusted to adjust the sensitivity of the CCD, etc. to light, but increasing the ISO value causes noise. As a result, there is a problem that the image quality is deteriorated, and it is used as a secondary control means.

Specifically, when there is sufficient light, a large aperture value (f value) and a fast shutter speed can be used. If a large aperture value is used (that is, when the aperture open hole is small), a deeper depth of field can be secured, so that not only the subject but also the surrounding area can be taken sharply. In addition, when the amount of light is abundant, a sufficient amount of light can be received even when a fast shutter speed is used. As such, if the shutter speed is increased, a fast moving or moving subject can be clearly photographed.

On the other hand, when the amount of light is sufficient, the videographer may set the camera to high quality before shooting and proceed with shooting.

Therefore, most photo and video photographers prefer a lighting environment that can use a large aperture value and a fast shutter speed. However, sunlight and the like in natural conditions vary greatly depending on the weather, time, and surrounding environment, and general living lighting indoors is often insufficient to express the subject according to the intention of the photographer.

Therefore, in order to solve this problem, various types of lighting devices for photographing or video recording have been developed and used. That is, lighting devices are widely used in the field of photographing images such as photographs or moving pictures for photographing in a place where there is insufficient light or for creating a different atmosphere.

However, in the case of using such a lighting device, the user must measure the brightness of the lighting device using an illuminometer before shooting or check the brightness of the light source through a test shot in order to determine an appropriate aperture value, shutter speed, and sensitivity (ISO) value. do.

As described above, the conventional lighting device has a problem of delaying the photographing time because it is necessary to measure the illuminance or take a test photograph before photographing. In addition, when the brightness of the subject changes due to changes in ambient lighting and the amount of sunlight in the space where the subject is located, it is very cumbersome and a factor that seriously degrades the shooting efficiency because it is necessary to perform a new step of illuminance measurement or test shooting each time a picture is taken. Became.

To solve this problem, a technology to automatically turn on/off the lighting device according to the surrounding brightness (illumination) was developed, but if the brightness is higher than the reference value, the lighting device is turned off (that is, the lighting device is operated). If the brightness is less than the reference value, the lighting device is turned on (that is, the lighting device is operated), and it is only a technology that controls the on/off of the lighting device according to the surrounding brightness.

In addition, there is a technology that controls the brightness of the lighting device according to the surrounding brightness (illuminance), rather than simply turning on/off the lighting device according to the surrounding brightness (illumination). In controlling the brightness of the lighting device, there is still a problem in that it is difficult to obtain a clearer image in the subject imaging step by simply reflecting only the illuminance value detected from the outside.

Korean Patent Registration No. 10-1818314 (announced on Jan. 12, 2018) Korean Patent Registration No. 10-1532027 (announced on June 29, 2015) Republic of Korea Patent Publication No. 10-2017-0024277 (published on March 7, 2017) Korean Patent Registration No. 10-1944868 (announced on April 17, 2019)

Therefore, the object of the present invention is, unlike a video camera that can connect a lighting synchronizer such as a DSLR (Digital Single Lens Reflex) camera, a smartphone cannot connect a lighting synchronizer, but the function of the lighting synchronizer is replaced with a photo-taking app. It is to provide a wireless synchronization control system of lighting for video shooting that can use external lighting that creates an optimal lighting environment even when taking commercial photos using a phone.

In order to achieve the object of the present invention described above, in an embodiment of the present invention, a main lighting device that emits light toward a subject according to a lighting synchronization signal input from the outside, and connected to the main lighting device, the main lighting device A receiver that receives the lighting synchronization signal transmitted toward and provides it to the main lighting device, an input module that receives a photographing request signal from the user, a communication module that transmits the lighting synchronization signal to the receiver, and photographs an image of a subject. A camera module and a photographing request signal input through the input module are detected to generate a camera synchronization signal and a lighting synchronization signal, and the camera synchronization signal is provided to the camera module, and the illumination synchronization signal is provided to the receiver through the communication module. It provides a wireless synchronization control system of lighting for video shooting, including a smartphone installed with a photo shooting app to be transmitted to.

According to the present invention, it is possible to take high-quality pictures as the performance of the smartphone camera develops, but it was difficult to take commercial pictures such as advertisement pictures with only the flash lamp built into the smartphone, but external lighting is linked to the smartphone. Even for commercial photography, expensive professional cameras can be replaced with smartphones.

In addition, the present invention restricts the output of the built-in flash of the smartphone located in front of the subject and outputs external lighting installed around the subject, thereby creating various lighting atmospheres according to the irradiation angle of the light source by external lighting.

In addition, the present invention can create a lighting atmosphere in which a product requiring texture, such as a cloth, can be photographed indoors.

1 is a block diagram illustrating a system for controlling wireless synchronization of lighting for photographing an image according to an embodiment of the present invention.
2 is a block diagram illustrating a system for controlling wireless synchronization of lighting for photographing an image according to another embodiment of the present invention.
3 and 4 are configuration diagrams showing a wireless tuning control system for lighting for photographing an image according to the present invention.

Hereinafter, with reference to the accompanying drawings, a wireless tuning control system (hereinafter, abbreviated as a'light control system for image shooting') using a smart phone according to preferred embodiments of the present invention will be described in detail.

1 is a block diagram illustrating a lighting control system for photographing an image according to an embodiment of the present invention.

Referring to FIG. 1, the lighting control system for image shooting according to the present invention includes a main lighting device 100 that emits light toward a subject, and a main lighting device by receiving a lighting synchronization signal transmitted to the main lighting device 100. It includes a receiver 200 provided to the device 100, and a smart phone 300 that generates an illumination synchronization signal according to a photographing request signal of a user, transmits it to the receiver, and photographs an image of a subject.

Hereinafter, each component will be described in more detail with reference to the drawings.

2 is a block diagram illustrating a lighting control system for photographing an image according to another embodiment of the present invention.

1 and 2, the lighting control system for photographing an image according to the present invention includes a main lighting device 100.

The main lighting device 100 emits light toward a subject, and may be installed on the left side of the subject, installed on the right side of the subject, or installed above the subject.

The main lighting device 100 may be connected to the smartphone 300 through the receiver 200.

If necessary, the main lighting device 100 may be configured to adjust the brightness (illuminance) and color temperature of the output lighting.

As the main lighting device 100, a flasher such as a strobe or a flash may be used. In addition, the main lighting device 100 may include a plurality of light sources having different color temperatures to output various color temperatures. For example, the main lighting device 100 is configured to include a plurality of LED modules to adjust the color temperature. At this time, the plurality of LED modules are composed of individual LEDs such as red LED, green LED, blue LED, or RGB LEDs.

In addition, as the main lighting device 100, an LED lighting device, a halogen lighting device, a fluorescent lighting device, or the like may be used. Specifically, as the LED lighting device, LED panel lights, spot lights, surface lights, flexible lights, and the like can be used. In addition, it is preferable to use a lighting device capable of controlling a light color of 3000K to 6000K in order to satisfy various light colors.

More specifically, as the main lighting device 100, a first LED having a color temperature of 6000K, which is mainly used while arranging the LED modules in a circular shape as a whole, is arranged and installed at uniform intervals in the center of the printed circuit board, and 3000K around it. A lighting device in which a second LED having a color temperature of is arranged in a circle can be used.

When controlling the light color in such an arrangement state, if the first LED and the second LED are simultaneously controlled at the same brightness, a color temperature of 4500K, which is intermediate, can be obtained, and if the brightness is reduced by controlling the current of the first LED in this state The color temperature changes close to 3000K, and when the first LED is completely turned off, a color temperature of 3000K is obtained.

On the contrary, if the brightness of the second LED is controlled and the brightness is reduced by controlling the first LED and the second LED at the same brightness to obtain a color temperature of 4500K, the color temperature gradually changes to close to 6000K, and the second LED is completely turned off. Then you get a color temperature of 6000 K.

When the control of the color temperature is divided by a certain section within the entire range and the divided data for each unit is input to the MCU circuit of the main lighting device 100, the main lighting device 100 outputs lighting having a specific color temperature. .

Meanwhile, the main lighting device 100 includes a lighting control app 150 that adjusts the brightness and color temperature of the self-illumination emitted toward the subject according to the lighting control signal transmitted from the smartphone 300 as shown in FIG. Can be installed.

In other words, the lighting control app 150 installed in the main lighting device 100 receives the lighting control signal transmitted from the receiver 200, and adjusts the brightness and color temperature of the light emitted toward the subject according to the lighting control signal. do.

In this way, the lighting control app 150 provides a function that enables the smartphone 300 to remotely control the brightness and color temperature of the lighting of the main lighting device 100.

3 and 4 are configuration diagrams showing a lighting control system for photographing an image according to the present invention.

Referring to FIGS. 3 and 4, the lighting control system for photographing an image according to the present invention may further include subjoint lighting devices 410 and 420.

The auxiliary lighting devices 410 and 420, together with the main lighting device 100, emit light toward a subject, and may be installed in a space where the main lighting device 100 is not installed among the left, right, or upper portions of the subject.

To this end, the auxiliary lighting devices 410 and 420 are provided with an optical sensor that detects light emitted from the main lighting device 100, and emits light toward the subject as the light is detected by the optical sensor.

As such, the auxiliary lighting devices 410 and 420 illuminate the subject together with the main lighting device 100, even if they are not connected to the main lighting device 100, the receiver 200, or the smartphone 300 by wire or wirelessly. Can be printed.

If necessary, the auxiliary lighting devices 410 and 420 may be installed in any two or more of the left, right, and upper portions of the subject based on the subject.

For example, as shown in FIGS. 3 and 4, when the main lighting device 100 is installed above the subject, a first auxiliary lighting device 410 is installed on the left side of the subject, and a second auxiliary lighting device is installed on the right side of the subject. (4200) can be installed.

In addition, the auxiliary lighting devices 410 and 420 may be configured to adjust the brightness (illuminance) and color temperature of the output lighting. Specifically, the auxiliary lighting devices 410 and 420 include a plurality of light sources having different color temperatures so as to output various color temperatures. For example, the auxiliary lighting devices 410 and 420 are configured to include a plurality of LED modules to adjust the color temperature. At this time, the plurality of LED modules are composed of single LEDs such as red LED, green LED, blue LED, or RGB LEDs.

In addition, as the auxiliary lighting devices 410 and 420, an LED lighting device, a halogen lighting device, and a fluorescent lighting device may be used.

In this way, the auxiliary lighting devices 410 and 420 are not provided with a receiver remotely connected to the smartphone 300, but may be configured in the same manner as the main lighting device 100 in a portion that emits light toward a subject.

1 and 2, the lighting control system for photographing an image according to the present invention includes a receiver 200.

The receiver 200 is connected to the main lighting device 100 and receives the lighting synchronization signal transmitted to the main lighting device 100 and provides it to the main lighting device 100. To this end, the receiver 200 may be connected to the smartphone 300 using a wireless communication protocol.

Specifically, the receiver 200 is Wi-Fi, WiBro (Wireless Broadband Internet, WiBro), HSDPA (High Speed Downlink Packet Access), wireless LAN, home RF, WiMAX (Worldwide Interoperability for Microwave Access), Zigbee ( ZigBee), Bluetooth, UWB (Ultra WideBand), IrDA (Infrared Data Association), SWAP (Shared Wireless Access Protocol) using any one of the wireless communication protocol can be connected to the main lighting device 100.

Also, the receiver 200 may receive the lighting control signal transmitted from the smartphone 300 and provide it to the main lighting device 100.

If necessary, the receiver 200 may be installed with a lighting control app that adjusts the brightness and color temperature of the light emitted from the main lighting device 100 according to the lighting control signal transmitted from the smartphone 300. In this case, as the main lighting device 100, photographic lighting such as a strobe, which is distributed on the market, can be used without any limitation.

In other words, when the lighting control signal is transmitted from the smartphone 300, the receiver 200 installed with the lighting control app controls the main lighting device 100 according to the lighting control signal, thereby controlling the brightness of the light emitted toward the subject and Adjust the color temperature.

In addition, the receiver 200 without the lighting control app installed serves to transmit the lighting control signal to the main lighting device 100 when the lighting control signal is transmitted from the smartphone 300.

1 to 4, the lighting control system for photographing an image according to the present invention includes a smart phone (300).

The smartphone 300 controls the lighting emission of the main lighting device 100 and photographs an image of a subject according to a photographing request signal input from a user, and is connected to the receiver 200 using a wireless communication protocol.

Specifically, the smartphone 300 includes an input module 310 for receiving a photographing request signal from a user, a communication module 320 for transmitting a lighting synchronization signal to the receiver, and a camera module 330 for photographing an image of a subject. ), and by detecting the photographing request signal input through the input module 310, a camera synchronization signal and a lighting synchronization signal are generated, the camera synchronization signal is provided to the camera module 330, and the lighting synchronization signal is transmitted to the communication A photo-taking app 340 that transmits to the receiver 200 through the module 320 is installed.

The input module 310 constituting the smart phone 300 according to the present invention detects a user's touch on a specific area requesting to take a picture through the screen, generates a photographing request signal, and generates a photographing request signal. By passing to the photographing app 340, it may be formed of a liquid crystal of a smartphone having a touch screen.

The input module 310 may receive photographing condition information from a user so that the photographing condition information is set in the photographing app 340.

The communication module 320 constituting the smartphone 300 according to the present invention is connected to the receiver 200 using a wireless communication protocol, and a lighting synchronization signal to the receiver 200 at the request of the photo-taking app 340 B Transmit lighting control signals or both.

The camera module 330 constituting the smart phone 300 according to the present invention captures an image of a subject with preset shooting condition information according to the user's shooting request signal input from the user, from the photo shooting app 340 The image of the subject is taken according to the transmitted camera synchronization signal. Here, the photographing condition information includes one or more of a shutter speed, an aperture value, and a sensitivity value of the camera module 330.

The photo-taking app 340 constituting the smartphone 300 according to the present invention generates a camera synchronization signal and a lighting synchronization signal according to a photographing request signal input by a user, and the camera module 330 through each synchronization signal. And to control the main lighting device 100, it can be installed on the smartphone 300 by downloading through the Android Market, the app store, or a web page.

The photo-taking app 340 is exposed in the form of an icon on the screen of the smartphone 300, and when the icon is clicked by the user, the camera photographing screen is output to the liquid crystal of the smartphone.

When the photographing request signal is input, the photographing app 340 analyzes photographing condition information collected from the basic camera app installed on the smartphone 300 or self-stored photographing condition information, and the brightness and color temperature corresponding to the photographing condition information A lighting control signal can be generated so that the lighting is emitted.

The photo-taking app 340 provides a function for the user to directly set shooting condition information. To this end, a photographing condition setting icon is provided on the camera photographing screen, and when a touch signal for the photographing condition setting icon is input through the input module 310, the photographing app 340 is a camera module according to the touch signal. After adjusting the shutter speed, aperture value, and sensitivity (ISO) value, save.

A shooting start icon is provided on the camera shooting screen, and when a touch signal for the shooting start icon is input through the input module 310, the photo shooting app 340 generates a camera sync signal and transmits the camera sync signal to the camera. It is provided as a module 330.

In this way, the photo shooting app 340 collects shooting condition information, and when a shooting request signal is detected, generates a lighting control signal matched with the shooting condition information so that the light is emitted at a brightness and color temperature corresponding to the shooting condition information. , Transmits the lighting control signal to the receiver 200 through the communication module.

The photo-taking app 340 may be provided with a shooting mode setting button on the camera shooting screen that automatically sets a preset brightness (illuminance) value and a color temperature value.

These shooting mode setting buttons include indoor photo shooting mode, outdoor photo shooting mode, indoor video shooting mode, and outdoor video shooting mode, and the user can set different brightness (illuminance) values and color temperature values according to each shooting mode. It helps you to set it up easily.

The photo-taking app 340 may be provided with a power button for selectively controlling on/off of the main lighting device 100 on a camera photographing screen.

Meanwhile, the smart phone 300 may be provided with a flash lamp (not shown) that sequentially outputs preliminary light emission and main light emission according to a photographing request signal. When the camera module captures an image of a subject, the flash lamp sequentially outputs preliminary light emission and main light emission toward a subject located in a low light environment under the control of the smartphone 300 in order to form a bright illumination environment.

In this way, when a flash lamp is provided in the smartphone, the photo-taking app 340 generates a flash lamp stop signal by detecting a photographing request signal input through the input module 310, and flashes the flash lamp stop signal. It can be configured to serve as a lamp.

This is to prevent a problem in which the lighting of the flash lamp emitted from the front of the subject toward the subject collapses the lighting balance formed by the main lighting device 100 and the auxiliary lighting devices 410 and 420.

The lighting control system for photographing an image according to the present invention may further include a sensor unit (not shown).

The sensor unit is installed near the subject or the subject in order to detect the brightness (illuminance) and color temperature created around the subject at the location of the subject, and reads the illuminance information and color temperature information of the subject to be photographed.

When the light source of the main lighting device 100 is emitted according to the lighting control signal, the sensor unit collects the brightness (illumination) and color temperature around the subject to generate on-site lighting information, and then a photo-taking app of the smartphone 300 ( 340). To this end, the sensor unit may be connected to the smartphone 300 using a wireless communication protocol.

At this time, the photo-taking app 340 compares the target lighting information corresponding to the shooting condition information with the site lighting information, and generates corrected lighting information for brightness and color temperature so that the site lighting information matches the target lighting information, and the modified lighting The information is transmitted to the receiver 200. And the photo-taking app 340 transmits the lighting control signal matched to the last modified lighting information to the receiver 200 so that the main lighting device 100 emits light as the last modified lighting information when the on-site lighting information matches the target lighting information. Then, a camera synchronization signal is transmitted to the camera module 330 that delays capturing an image of the subject to capture an image of the subject.

Although described above with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the following claims. You will understand that you can.

100: main lighting device 200: receiver
300: smartphone 310: input module
320: communication module 330: camera module
340: photo app 410: first auxiliary lighting device
420: second auxiliary lighting device

Claims (6)

A main lighting device that emits light toward the subject according to the lighting synchronization signal input from the outside;
A receiver connected to the main lighting device and receiving a lighting synchronization signal transmitted to the main lighting device and providing it to the main lighting device;
An input module that receives a photographing request signal and photographing condition information from a user, a communication module that transmits a lighting synchronization signal to the receiver, a camera module that photographs an image of a subject, and a photographing request signal input through the input module. It detects and generates a camera synchronization signal and an illumination synchronization signal for controlling the camera module and the main lighting device, provides the camera synchronization signal to the camera module, and transmits the illumination synchronization signal to the receiver through the communication module. And, when the photographing request signal is detected, a lighting control signal matching the photographing condition information is generated so that the lighting is emitted at a brightness and color temperature corresponding to the photographing condition information, and the lighting control signal is transmitted to a receiver through a communication module. A smartphone with a photo app installed; And
Even if not connected to the main lighting device, the receiver, or the smartphone, an optical sensor for detecting the light emitted from the main lighting device is provided so that lighting can be output toward the subject together with the main lighting device. It includes an auxiliary lighting device that emits light toward the subject as it is detected,
When the photo-taking app is provided with a flash lamp that sequentially outputs preliminary light emission and main light emission according to the shooting request signal on the smartphone, the input module does not collapse the lighting balance formed by the main lighting device and the auxiliary lighting device. And generating a flash lamp stop signal by detecting a photographing request signal input through the device, and providing the flash lamp stop signal to the flash lamp. delete delete The method of claim 1, wherein the main lighting device
A wireless synchronization control system for video-taking lighting, characterized in that a lighting control app that adjusts the brightness and color temperature of the light emitted toward the subject according to the light control signal transmitted from the receiver is installed. The method of claim 1, wherein the photographing condition information
A wireless synchronization control system for lighting for photographing video, characterized in that at least one of a shutter speed, an aperture value, and a sensitivity value of the camera module is included. delete

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