Display device and control method therefor

Abstract

A display device is disclosed. One or more processors execute one or more instructions to: identify a driving signal for repeatedly outputting a frame identical to an original frame in each frame section on the basis of multiplication information; when each frame section is longer than the time during which each frame identical to the original frame is displayed, compensate for the application time and amplitude of a voltage corresponding to a driving signal for outputting the last frame identical to the original frame; and control a display to provide the last frame on the basis of the driving signal based on the compensated application time and amplitude of the voltage.

Description

Display device and control method thereof

[0001] The present invention relates to a display device and a control method thereof, and more particularly, to a display device having a large display and a control method thereof.

[0002] Recently, in filming movies and advertisements, filming techniques are being developed to display the background and surrounding environment of a specific space through a large display.

[0003] In the past, a green screen or chroma key was installed, and after filming, the graphic work was re-edited and filmed. However, recently, the method of installing a large display behind or around the actor and filming by displaying a virtual background and surrounding environment is increasing.

[0004] A display device according to one or more embodiments of the present disclosure includes a display, a memory storing one or more commands, and one or more processors.

[0005] According to one or more embodiments, the one or more processors, by executing the one or more commands, identify shutter speed information and shutter angle information corresponding to a photographing device, identify frame multiplication information based on the identified shutter speed information and the identified shutter angle information, identify a driving signal for repeatedly outputting a frame identical to an original frame in each frame section based on the multiplication information, and, when the section of each frame is longer than the time at which each frame identical to the original frame is displayed, compensate for the application time and amplitude of a voltage corresponding to the driving signal for outputting the last frame identical to the original frame, and control the display to provide the last frame based on the driving signal based on the application time and amplitude of the compensated voltage.

[0006] According to one or more embodiments, the driving signal is a PWM (Pulse Width Modulation) signal.

[0007] According to one or more embodiments, the one or more processors, by executing the one or more instructions, identify an overplus-time based on a difference in a time for displaying each frame section and a time for displaying each frame identical to the original frame, compensate for an application time of a voltage corresponding to a PWM signal of the last frame based on the overplus-time, and compensate for an amplitude of a voltage of a PWM signal corresponding to the last frame based on an amplitude of a voltage corresponding to a PWM signal which is a driving signal for outputting the remaining frames identical to the frames that are repeatedly output.

[0008] According to one or more embodiments, the one or more processors, by executing the one or more instructions, increase the application time of the voltage corresponding to the PWM signal of the last frame by the overplus-time, and increase the amplitude of the voltage of the PWM signal corresponding to the last frame to correspond to the amplitude of the voltage of the PWM signal corresponding to the remaining frames.

[0009] According to one or more embodiments, the apparatus further includes a memory storing multiplication information according to a plurality of shutter angle information corresponding to each of a plurality of shutter speed information, wherein the one or more processors, by executing the one or more commands, provide a UI including multiplication information according to a plurality of shutter angle information corresponding to each of the plurality of shutter speed information through the display based on the information stored in the memory.

[0010] According to one or more embodiments, the one or more processors, by executing the one or more commands, identify the multiplication information of the frame based on the selected multiplication information when one of the multiplication information included in the UI is selected according to a user input.

[0011] According to one or more embodiments, the one or more processors, by executing the one or more instructions, identify a time at which each frame is displayed based on the identified shutter speed information and the identified shutter angle information, and identify frame multiplication information based on the time at which each frame is displayed.

[0012] According to one or more embodiments, the frame multiplication information is information about the number of times the same frame is displayed in each frame section.

[0013] According to one or more embodiments, the display is an LED display including a plurality of LED pixels, and the one or more processors synchronize the shooting of the shooting device and the driving of the LED display by executing the one or more commands to multiply the driving frequency of the LED display to correspond to the plurality of frames displayed in each frame section based on the frame multiplication information.

[0014] According to one or more embodiments, the one or more processors, by executing the one or more commands, multiply frames corresponding to the background image and display the background image on the display, and the photographing device obtains an image of the background image displayed on the display and a user positioned in front of the background image.

[0015] A method for controlling a display device according to one or more embodiments of the present disclosure comprises: identifying shutter speed information and shutter angle information corresponding to a photographing device; identifying frame multiplication information based on the identified shutter speed information and the identified shutter angle information; identifying a driving signal for repeatedly outputting a frame identical to an original frame in each frame section based on the multiplication information; compensating for an application time and amplitude of a voltage corresponding to a driving signal for outputting a last frame identical to the original frame when the section of each frame is longer than a time for displaying each frame identical to the original frame; and controlling a display to provide the last frame based on a driving signal based on the application time and amplitude of the compensated voltage.

[0016] A non-transitory computer-readable storage medium storing computer instructions that, when executed by a processor of a display device, cause the display device to perform an operation, the operation includes: identifying shutter speed information and shutter angle information corresponding to a photographing device; identifying frame multiplication information based on the identified shutter speed information and the identified shutter angle information; identifying a driving signal for repeatedly outputting a frame identical to an original frame in each frame section based on the multiplication information; compensating for an application time and amplitude of a voltage corresponding to a driving signal for outputting a last frame identical to the original frame when the section of each frame is longer than a time for displaying each frame identical to the original frame; and controlling the display to provide the last frame based on a driving signal based on the application time and amplitude of the compensated voltage.

[0017] FIG. 1 is a drawing for explaining the operation of a display device according to one or more embodiments.

[0018] FIG. 2 is a block diagram illustrating a configuration of a display device according to one or more embodiments.

[0019] FIG. 3 is a block diagram illustrating a detailed configuration of a display device according to one or more embodiments.

[0020] FIG. 4 and FIG. 5 are drawings for explaining a frame output process of a display device according to one or more embodiments.

[0021] FIG. 6 and FIG. 7 are drawings for explaining a frame multiplication process of a display device according to one or more embodiments.

[0022] FIG. 8 is a drawing for explaining a flicker phenomenon according to one or more embodiments.

[0023] FIG. 9 is a diagram for explaining a process of identifying multiplication information and overplus-time according to one or more embodiments.

[0024] FIG. 10 and FIG. 11 are drawings for explaining a method of compensating a frame drive signal according to one or more embodiments.

[0025] FIG. 12 is a diagram illustrating a UI including distribution information according to one or more embodiments.

[0026] FIG. 13 is a drawing for explaining a method of controlling a display device according to one or more embodiments.

[0027] The terms used in the various embodiments of this disclosure have been selected from widely used, current terms, taking into account the functions of this disclosure. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the description of the relevant disclosure. Therefore, the terms used in this disclosure should be defined based on the meaning of the terms and the overall content of this disclosure, rather than simply their names.

[0028] In this disclosure, expressions such as “has,” “can have,” “includes,” or “may include” indicate the presence of a corresponding feature (e.g., a component such as a number, function, operation, or part), and do not exclude the presence of additional features.

[0029] The expression "at least one of A and / or B" should be understood to mean either "A" or "B" or "A and B".

[0030] The expressions “first,” “second,” “first,” or “second,” etc., used in this disclosure can describe various components, regardless of order and / or importance, and are only used to distinguish one component from another, but do not limit the components.

[0031] When it is said that a component (e.g., a first component) is “(operatively or communicatively) coupled with / to” or “connected to” another component (e.g., a second component), it should be understood that the component may be directly coupled to the other component, or may be connected through another component (e.g., a third component).

[0032] Singular expressions include plural expressions unless the context clearly dictates otherwise. In this disclosure, terms such as "comprise" or "consist of" are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood not to preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0033] In the present disclosure, a "module" or "part" performs at least one function or operation and may be implemented as hardware or software, or as a combination of hardware and software. Furthermore, multiple "modules" or multiple "parts" may be integrated into at least one module and implemented as at least one processor (not shown), excluding any "modules" or "parts" that need to be implemented as specific hardware.

[0034] In this disclosure, the term user may refer to a person using an electronic device or a device used by the person.

[0035] An embodiment of the present disclosure will be described in more detail with reference to the attached drawings below.

[0036] FIG. 1 is a drawing for explaining the operation of a display device according to one or more embodiments.

[0037] The display device (100) may be a device for displaying a background and / or surrounding environment for a specific space for filming a movie and / or advertisement. The display device (100) may output input images of the background and surrounding environment through a large-scale display screen. The display device (100) may be positioned behind an actor filming a movie or advertisement to display the background for a specific space. The display device (100) may be positioned not only behind the actor, but also above, below, on both sides, or in a form that surrounds the entire actor. The display device (100) may be implemented in various forms, such as a large-scale display, a modular display, a curved display, or a flexible display.

[0038] While the display device (100) displays the background and / or surrounding environment for a specific space, the photographing device (200) can capture the screen displayed on the display device (100). Here, the photographing device (200) may be a device for capturing actors, backgrounds, or surrounding environments in filming movies and advertisements. The photographing device (200) may be implemented in various forms, such as a digital camera, a digital cinema camera, a video camera, a film camera, a DSLR (Digital Single-Lens Reflex) camera, an action camera, a handycam, etc.

[0039] Referring to FIG. 1, a display device (100) can output a background image (10) for filming movies and advertisements. The display device (100) can control a driver integrated circuit (IC) to output a background image (10) based on a specific driving frequency. For example, the display device (100) can output a background image (10) based on a driving frequency of 24 Hz or 60 Hz.

[0040] When a photographing device (100) photographs a background image (10) output from a display device (100) according to a driving frequency, a screen cut-off phenomenon may occur in the background image photographed by the photographing device (200). Specifically, the screen cut-off phenomenon may occur depending on the driving frequency for the output image of the display device (100) and the shutter speed and shutter angle of the photographing device (200).

[0041] The shutter speed of a photographing device refers to the time it takes for the shutter of the photographing device to open and receive light to capture a single scene. The faster the shutter speed, the more scenes can be captured in the same amount of time. For example, if the shutter speed is 60 Hz, the photographing device (200) can capture 60 scenes per second, that is, capture and save one scene in 1 / 60 of a second. The shutter speed is not limited thereto and may be referred to in various ways, such as frame speed and shooting speed, but in the present disclosure, it will be collectively referred to as shutter speed.

[0042] The shutter angle of a photographic device refers to the angle at which the rotary shutter of the photographic device opens and closes. The rotary shutter can capture individual frames by allowing light to enter once every time a disk with angled holes at a specific angle rotates. At this time, the rotary shutter of the photographic device can adjust the amount of light entering depending on the size of the shutter angle, so the range of frame scenes to be captured can vary. Meanwhile, the shutter angle is not limited to this and can be referred to in various ways, such as the exposure angle and the aperture angle, but in this disclosure, it will be referred to collectively as the shutter angle.

[0043] For example, if the driving frequency of the display device (100) is 24 Hz and the shutter speed of the photographing device (200) is 24 Hz, the image for the output image photographed from the photographing device (200) may be an image (20) with a portion of the screen cut off, as illustrated in FIG. 1, rather than a full frame image for a specific frame.

[0044] For example, if the driving frequency of the display device (100) is 24 Hz, the shutter speed of the photographing device (200) is 24 Hz, and the shutter angle is 180 degrees, the image for the output image photographed from the photographing device (200) may be an image (20) in which 50% of the entire frame for a specific frame is cropped, as illustrated in FIG. 1.

[0045] For example, if the driving frequency of the display device (100) is 24 Hz, the shutter speed of the photographing device (200) is 24 Hz, and the shutter angle is 216 degrees, the image for the output image photographed from the photographing device (200) may be an image in which 40% of the entire frame for a specific frame is cropped.

[0046] For example, when the driving frequency for the background image (10) of the display device (100) and the shutter speed of the photographing device (200) are different, the background image (10) output by the display device (100) may exhibit a screen cut-off phenomenon in the image of the background image photographed by the photographing device (200). For example, even when the driving frequency for the background image (10) of the display device (100) and the shutter speed of the photographing device (200) are the same, the screen cut-off phenomenon (20) may appear depending on the shutter angle of the photographing device (200).

[0047] According to one embodiment, the display device (100) may multiply frames of an output image to prevent screen cutoff. Frame multiplication may be a method of repeatedly outputting frames. According to one example, the display device (100) may multiply the driving frequency to output multiple identical frames in each frame section.

[0048] For example, the display device (100) can repeatedly output multiple frames identical to the corresponding frame in each frame section. Each frame section may be a time section in which one frame is output according to the frame rate of the display device (100). The frame rate may indicate the number of frames per unit time in an image. Generally, the frame rate is measured in frames per second, and the unit may be FPS (Frames Per Second).

[0049] When outputting frames by multiplying them in each frame section, a flicker phenomenon may appear depending on the driving time and amplitude of the last frame among the multiple frames output in each frame section. The flicker phenomenon is not limited to this, and may be referred to in various ways, such as a blinking phenomenon or a flash phenomenon, but in the present disclosure, it will be collectively referred to as the flicker phenomenon.

[0050] Flickering refers to a flickering phenomenon that occurs when a display screen is repeatedly turned on and off rapidly at a specific frequency. For example, if the operating time of the last frame among multiple frames that are identical to frame 1 during one first frame period is shorter than the operating time of the first frame period, there may be no screen output from the off time of the last frame to the start of the second frame period, resulting in a flickering phenomenon caused by the brightness of the light.

[0051] Below, a method for preventing screen tearing and flickering by controlling the driving frequency for the output image of the display device (100) will be described in detail.

[0052] FIG. 2 is a block diagram illustrating a configuration of a display device according to one or more embodiments.

[0053] According to FIG. 2, the display device (100) includes a display (110), a memory (120), and one or more processors (130). However, the present invention is not limited thereto, and the display device (100) may be implemented in a form in which some components are excluded, or may be implemented in a form in which other components are further included.

[0054] The display (110) is a configuration for outputting an input image of the background and surrounding environment of a specific space and providing it to the user. The display (110) may be implemented as a display including a self-luminous element or a display including a non-luminous element and a backlight. For example, it may be implemented as various types of displays such as an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diodes) display, an LED (Light Emitting Diodes), a micro LED, a Mini LED, a PDP (Plasma Display Panel), a QD (Quantum dot) display, a QLED (Quantum dot light-emitting diodes), etc. The display (110) may also include a driving circuit, a backlight unit, etc., which may be implemented in a form such as an a-si TFT, an LTPS (low temperature poly silicon) TFT, an OTFT (organic TFT), etc. For example, the display (110) may be implemented as a flat display, a curved display, a flexible display capable of folding or / and rolling, a touch display, etc.

[0055] According to one example, one or more processors (130) may provide a UI (User Interface) including multiplication information according to a plurality of shutter angle information corresponding to each of a plurality of shutter speed information through a display (110).

[0056] The memory (120) can store at least one command, data, program, etc. required for the operation of the display device (100). For example, the memory (120) can store multiplication information according to a plurality of shutter angle information corresponding to each of a plurality of shutter speed information.

[0057] The memory (120) may be implemented in the form of memory embedded in the display device (100) or in the form of memory detachable from the display device (100) depending on the purpose of data storage. For example, data for driving the display device (100) may be stored in a memory embedded in the display device (100), and data for the expansion function of the display device (100) may be stored in a memory detachable from the display device (100).

[0058] In the case of memory embedded in the display device (100), it may be implemented as at least one of volatile memory (e.g., dynamic RAM (DRAM), static RAM (SRAM), or synchronous dynamic RAM (SDRAM)), non-volatile memory (e.g., one time programmable ROM (OTPROM), programmable ROM (PROM), erasable and programmable ROM (EPROM), electrically erasable and programmable ROM (EEPROM), mask ROM, flash ROM, flash memory (e.g., NAND flash or NOR flash), hard drive, or solid state drive (SSD)).

[0059] The memory (120) may be implemented as a single memory that stores data generated in various operations according to the present disclosure, but is not limited thereto, and the memory (120) may be implemented to include multiple memories that each store different types of data or each store data generated in different stages.

[0060] One or more processors (130) control the overall operation of the display device (100). Specifically, one or more processors (130) are connected to each component of the display device (100) and can control the overall operation of the display device (100). For example, one or more processors (130) are electrically connected to the display (110) and the memory (120) and can control the overall operation of the display device (100). One or more processors (130) may be configured as one or more processors.

[0061] One or more processors (130) can perform operations of the display device (100) according to various embodiments by executing one or more commands stored in the memory (120).

[0062] The one or more processors (130) may include one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), an Accelerated Processing Unit (APU), a Many Integrated Core (MIC), a Digital Signal Processor (DSP), a Neural Processing Unit (NPU), a hardware accelerator, or a machine learning accelerator. The one or more processors (140) may control one or any combination of other components of the refrigeration device, and may perform operations related to communication or data processing. The one or more processors (140) may execute one or more programs or instructions stored in a memory. For example, the one or more processors may perform a method according to one or more embodiments of the present disclosure by executing one or more instructions stored in a memory.

[0063] When a method according to one or more embodiments of the present disclosure includes multiple operations, the multiple operations may be performed by one processor or by multiple processors. For example, when a first operation, a second operation, and a third operation are performed by a method according to one or more embodiments, the first operation, the second operation, and the third operation may all be performed by the first processor, or the first operation and the second operation may be performed by the first processor (e.g., a general-purpose processor) and the third operation may be performed by the second processor (e.g., an artificial intelligence-specific processor).

[0064] One or more processors (130) may be implemented as a single core processor including one core, or may be implemented as one or more multicore processors including multiple cores (e.g., homogeneous multicores or heterogeneous multicores). When one or more processors (130) are implemented as a multicore processor, each of the multiple cores included in the multicore processor may include an internal processor memory, such as a cache memory or an on-chip memory, and a common cache shared by the multiple cores may be included in the multicore processor. In addition, each of the multiple cores (or some of the multiple cores) included in the multicore processor may independently read and execute a program instruction for implementing a method according to one or more embodiments of the present disclosure, or all (or some) of the multiple cores may be linked to read and execute a program instruction for implementing a method according to one or more embodiments of the present disclosure.

[0065] When a method according to one or more embodiments of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one core among the plurality of cores included in a multi-core processor, or may be performed by the plurality of cores. For example, when a first operation, a second operation, and a third operation are performed by a method according to one or more embodiments, the first operation, the second operation, and the third operation may all be performed by a first core included in the multi-core processor, or the first operation and the second operation may be performed by a first core included in the multi-core processor, and the third operation may be performed by a second core included in the multi-core processor.

[0066] In the embodiments of the present disclosure, a processor may mean a system on a chip (SoC) in which one or more processors and other electronic components are integrated, a single-core processor, a multi-core processor, or a core included in a single-core processor or a multi-core processor, wherein the core may be implemented as a CPU, a GPU, an APU, a MIC, a DSP, an NPU, a hardware accelerator, or a machine learning accelerator, but the embodiments of the present disclosure are not limited thereto. Hereinafter, for the convenience of explanation, one or more processors (130) will be referred to as a processor (130).

[0067] According to one embodiment, the processor (130) may control the driver IC to output an output image based on a specific driving frequency. According to one example, the processor (130) may be implemented in a form that includes a driver IC for driving the display (110). For example, the processor (130) may be implemented as a DSP and may be implemented as one chip with a digital driver IC. However, it goes without saying that the driver IC may be implemented as separate hardware from the processor (130). For example, when the pixels included in the display (110) are implemented as LED elements, the driver IC may be implemented as at least one LED driver that controls the current applied to the LED elements.

[0068] In one embodiment, the LED driver may be positioned after a power supply (e.g., a switching mode power supply (SMPS)) and may receive voltage from the power supply. However, in another embodiment, the LED driver may receive voltage from a separate power supply.

[0069] According to one embodiment, the processor (130) can identify shutter speed information and shutter angle information corresponding to the photographing device (200). For example, the processor (130) can identify shutter speed information and shutter angle information from a user input. For example, the processor (130) can receive shutter speed information and shutter angle information from the photographing device (200). For example, the processor (130) can receive speed information and shutter angle information corresponding to the photographing device (200) from at least one of a mobile device, a server, and an external device.

[0070] According to one embodiment, the processor (130) may identify frame multiplication information based on the identified shutter speed information and the identified shutter angle information. Multiplication information refers to information about the number of times a frame corresponding to each frame section is repeatedly displayed in each frame section. Specifically, it refers to information about an integer multiple that is multiplied by an input frequency in order for the display device to output a higher frequency. For example, when the driving frequency is 24 Hz, the display device (100) may output a 360 Hz image by multiplying the existing driving frequency by 15 in order to output an input image with a driving frequency of 360 Hz. Multiplication information is not limited thereto and may be referred to in various ways such as magnification information, multiplication information, and amplification information, but will be collectively referred to as multiplication information in the present disclosure.

[0071] In one embodiment, the processor (130) can identify the time at which each of the plurality of frames is displayed in each frame interval.

[0072] For example, the processor (130) can identify the multiplication information according to the multiplication information stored in the memory (120) based on the identified shutter speed information and shutter angle information.

[0073] For example, the processor (130) can calculate a multiplication value and identify multiplication information based on the display time corresponding to each of the identified multiple frames.

[0074] According to one embodiment, the processor (130) may identify driving signals of multiple frames displayed in each frame section based on the multiplication information. For example, the processor (130) may identify frequency information for multiple frames and identify a PWM (Pulse Width Modulation) signal based on the frequency information. The PWM signal refers to a signal that is expressed by adjusting the pulse of a frequency signal according to a specific amplitude. Specifically, it refers to a signal that is expressed by adjusting the activation time of the driving signal that is driven in each frame to indicate a driving signal corresponding to a specific amplitude and a specific pulse.

[0075] According to one embodiment, the processor (130) may compensate for the application time and amplitude of the voltage corresponding to the driving signal of the last frame if the interval of each frame is longer than the time at which multiple frames are displayed. For example, if the time at which the last frame is displayed and the time at which the next frame interval begins in a specific frame interval do not match, the processor (130) may increase the driving time of the last frame to prevent a flicker phenomenon between each frame.

[0076] FIG. 3 is a block diagram illustrating a detailed configuration of a display device according to one or more embodiments.

[0077] According to FIG. 3, the display device (100) includes a display (110), a memory (120), one or more processors (130), a communication interface (140), a user interface (150), a speaker (160), and a microphone (170). Among the configurations illustrated in FIG. 3, a detailed description of configurations that overlap with those illustrated in FIG. 2 will be omitted.

[0078] The communication interface (140) includes a circuit and can communicate with an external device (a photographing device or server). For example, the processor (130) can receive various data or information from an external device connected via the communication interface (140), and can also transmit various data or information to the external device.

[0079] The communication interface (140) may include at least one of a WiFi module, a Bluetooth module, a wireless communication module, an NFC module, and a UWB module (Ultra Wide Band). At this time, the wireless communication module may perform communication according to various communication standards such as IEEE, Zigbee, 3G (3rd Generation), 3GPP (3rd Generation Partnership Project), LTE (Long Term Evolution), 5G (5th Generation), etc.

[0080] For example, the processor (130) can receive shutter speed information and shutter angle information from the photographing device (200) through the communication interface (140). For example, the processor (130) can receive frame multiplication information from the server through the communication interface (140).

[0081] The user interface (150) may be implemented as a device such as a button or touch pad on the display device (100), or may be implemented as a touch screen capable of performing both display functions and operation input functions.

[0082] For example, the user interface (150) can receive user input for entering shutter speed information, shutter angle information, and frame multiplication information, user input for selecting a frame multiplication value, etc.

[0083] The speaker (160) can convert and amplify a digital audio signal processed by the processor (130) into an analog audio signal and output it. For example, the speaker (160) can include at least one speaker unit, a D / A converter, an audio amplifier, etc., which can output at least one channel. For example, the speaker (160) can output an audio signal of an output image output from the display device (100).

[0084] The microphone (170) is configured to receive user voice or other sounds and convert them into audio data.

[0085] For example, the microphone (170) can receive user voice information such as shutter speed information, shutter angle information, and frame rate information. However, according to another example, the display device (100) can receive user voice input through an external device through the communication interface (140).

[0086] FIG. 4 and FIG. 5 are drawings for explaining a frame output process of a display device according to one or more embodiments.

[0087] According to one embodiment, the display device (100) can sequentially scan a video signal corresponding to one frame in a specific direction to output the frame on the display (110) screen.

[0088] Referring to FIG. 4, the display device (100) may output image signals (40-1 to 40-12) for one frame, for example, frame 1, by sequentially scanning them in a specific direction, rather than outputting them all at once. For example, when the driving frequency of the display device (100) is 24 Hz, the display device (100) may output an image by sequentially scanning the image signal corresponding to frame 1 from the upper side to the lower side of the display screen for 1 / 24 second. The display device (100) may reduce power consumption and improve the overall performance of the display device (100) by activating pixels in a specific area rather than activating all pixels arranged in the entire display simultaneously. In FIG. 4, the display device (100) is illustrated as scanning image signals from the upper side to the lower side, but is not limited thereto and may scan image signals in other directions.

[0089] For example, the display device (100) can sequentially generate an image by injecting image signals in the order of 40-1, 40-2, 40-6, 40-12 for frame 1, and output the entire image.

[0090] For example, if the shutter speed of the photographing device (200) is 24 Hz and the shutter angle is 180 degrees, the time required for the rotary shutter of the photographing device (200) to rotate once may be 1 / 24 second, and the open state (41) and the closed state (42) may each be half during the entire rotation period. That is, the photographing device (200) may capture the output image of the display device (100) by operating the open state (41) and the closed state (42) for 1 / 48 second each during 1 / 24 second. At this time, when the photographing device (200) captures the output image of the display device (100), the captured image for the output image may be a half image (40-1 to 40-6) rather than the entire image of frame 1.

[0091] For example, when the shutter angle of the photographing device (200) increases from 180 degrees to 200 degrees, the ratio of the open state increases more than the closed state. Accordingly, the image captured by the photographing device (200) may include a relatively wider range of images compared to when the shutter angle is 180 degrees. For example, when the shutter angle is 200 degrees, the image captured by the photographing device (200) may include a wider range of images (40-1 to 40-8) than the images (40-1 to 40-6) included in the image captured at 180 degrees.

[0092] Referring to FIG. 5, the display device (100) can sequentially output a plurality of frames (510, 520, 530) for a preset time (1 / 24 second) according to the output frequency of the display (110). In FIG. 5, the interval for each frame (510, 520, 530), the shutter open state interval, and the shutter closed state interval may represent time. When the display device (100) is captured by the photographing device (200) while the display device (100) is outputting a plurality of frames (510, 520, 530), the photographing device (200) performs capturing during the time (540-1 to 540-3) during which the shutter is open, and therefore, the captured image may be an image for half of each frame (510, 520, 530) output from the display device (100).

[0093] For example, while the display device (100) outputs frame 1, since shooting is performed only during the open time (1 / 48 second) (540-1) of the shutter of the shooting device (200), the image for frame 1 captured by the shooting device (200) may only include images corresponding to 1 / 2 of frame 1. Similarly, while the display device (100) outputs frame 2 and frame 3, the images for frames 2 and 3 captured by the shooting device (200) may only include images corresponding to 1 / 2 of frames 2 and 3, respectively.

[0094] FIG. 6 and FIG. 7 are drawings for explaining a frame multiplication process of a display device according to one or more embodiments.

[0095] According to one embodiment, the display device (100) may control the driving frequency of the output image to multiply and output each frame in order to prevent screen cut-off phenomenon occurring in an image captured by the capturing device (200). The display device (100) may repeatedly output the same frame as the frame output in each frame section (hereinafter, original frame) in each frame section.

[0096] Here, each frame section may be a time section in which one frame is output according to the output frequency of the display (110). For example, each frame section may include a first frame section, a second frame section, and a third frame section. According to an example, the display device (100) may repeatedly output a frame identical to the original frame corresponding to each frame section in each frame section. For example, when the display device (100) multiplies the original frame, for example, frame 1, by 16, the display device (100) may output 16 frames identical to frame 1.

[0097] In this way, the display device (100) can output multiple frames identical to the original frame in each frame section so that each frame output time is synchronized with the shutter open time of the photographing device in order to prevent the screen cut-off phenomenon that occurs when shooting at the shutter open time of the photographing device. Referring to FIG. 6, the display device (100) can output multiple frames identical to the original frame in each frame section by multiplying the original frames (610, 620, 630) output in each frame section. For example, the display device (100) can output multiple frames (610-1 to 610-16) identical to frame 1 (610) by multiplying frame 1 (610) by 16 in the first frame section corresponding to frame 1 (610). For example, when the shutter angle of the display device (100) is 180 degrees, the time corresponding to the open state (640) of the shutter and the time corresponding to the closed state (650) of the shutter are the same, so the display device (100) can output the same number of frames during the open state (640) of the shutter and the closed state (650) of the shutter.

[0098] Referring to FIG. 7, when the shutter angle is changed to 192 degrees, the display device (100) can multiply each frame (710, 720, 730) based on the changed shutter angle (192 degrees). For example, when the shutter angle is 192 degrees, the display device (100) can output a greater number of frames while the shutter is in the open state (740) than while the shutter is in the closed state (750) because the time corresponding to the open state (740) of the shutter is longer than the time corresponding to the closed state (750). For example, the display device (100) can output 115 frames (710-1 to 710-15) multiplied by 15 based on the shutter speed and shutter angle, 8 frames (710-1 to 710-8) during the open state (740) of the shutter, and 7 frames (710-9 to 710-15) during the closed state (750) of the shutter.

[0099] For example, the display device (100) can output a plurality of frames (610-1 to 610-8) in synchronization with the start and end times of the shutter open time of the photographing device (200).

[0100] For example, when the shutter angle of the display device (100) is 180 degrees, half of the 16-multiplied frame 1 (610-1 to 610-8) can be output during the shutter open state (640), and the remaining half (610-9 to 610-16) can be output during the shutter closed state (650).

[0101] For example, referring to FIG. 7, when the shutter angle is 192 degrees, the display device (100) can output frames (710-1 to 710-8) exceeding half of the 15-multiplied frame 1 during the shutter open state (740), and the remaining frames (710-9 to 610-15) during the shutter close state (750).

[0102] For example, when the shutter angle is 30 degrees, the display device (100) can output the first frame of 12-multiplied frames 1 during the shutter open state and the remaining frames during the shutter close state.

[0103] For example, when the shutter angle is 240 degrees, the display device (100) can output 10 frames out of 15-multiplied frame 1 during the shutter open state and the remaining frames during the shutter close state.

[0104] For example, the display device (100) can identify the multiplication value (15 multiplication, 16 multiplication) of each frame based on the multiplication information table stored in the memory (120). For example, the display device (100) can calculate the display time of each of the multiple frames based on the shutter speed information and shutter angle information of the photographing device (200), and identify the multiplication value based on the calculated time. A detailed description thereof will be provided below.

[0105] FIG. 8 is a drawing for explaining a flicker phenomenon according to one or more embodiments.

[0106] According to one embodiment, when the display device (100) performs frame multiplication based on the shutter speed and shutter angle, it can identify overplus-time based on the difference in time between each frame section and the time at which multiple frames are displayed.

[0107] Here, overplus-time refers to a time that occurs when the identified multiplication value based on the shutter speed and shutter angle does not correspond to an integer multiple, and thus the last frame among multiple frames does not reach the entire operation time of each section. For example, if the end time of the last frame among multiple frames that multiply frame 1 provided in the first frame section and the end time of this first frame section are not synchronized, overplus-time may occur from the end time of the last frame to the end time of frame 1. Overplus-time is not limited thereto, and may be referred to in various ways such as non-arrival time, frame arrival time, frame exceeding time, etc., but in the present disclosure, it will be collectively referred to as overplus-time.

[0108] Referring to FIG. 8, when the shutter speed of the photographing device (200) is 24 Hz and the shutter angle is 194 degrees, the display device (100) can output the same 15 frames (810-1 to 810-15) by multiplying frame 1 (810) by 15. In this case, unlike the case where the shutter angle of FIG. 7 is 192 degrees, even if frame 1 (810) is multiplied by 15, the display device (100) may not output a screen for an angle value of 2 degrees and a time of about 231 us. For example, the display device (100) may output a black screen (80) with no screen output during that time. For example, the display device (100) may output the last frame corresponding to frame 1 and then output frame 2 (820) after 231 us. At this time, the display device (100) may experience a flicker phenomenon depending on the screen brightness between the last frame output time corresponding to frame 1 (810) and the first frame output time corresponding to frame 2 (820).

[0109] FIG. 9 is a diagram for explaining a process of identifying multiplication information and overplus-time according to one or more embodiments.

[0110] According to one embodiment, the display device (100) can identify the time at which each of the plurality of frames is displayed based on the identified shutter speed information and the identified shutter angle information.

[0111] According to one embodiment, the display device (100) can identify frame resolution information based on the time at which each of the plurality of frames is displayed.

[0112] According to one embodiment, the display device (100) can identify an overplus-time to increase the driving time of the last frame among a plurality of frames.

[0113] Referring to FIG. 9, when the shutter speed of the photographing device (200) is 24 Hz and the shutter angle is 216 degrees, the display device (100) can calculate the output time of one frame (910-1) among a plurality of frames (910-1 to 910-16) in which frame 1 (910) is multiplied using the following mathematical formula.

[0114]

[0115] For example, if the display device (100) has a shutter speed of 24 Hz and a shutter angle of 216 degrees, the output time for one frame (910-1) among a plurality of frames is based on mathematical expression 1. can be produced as

[0116] When the driving frequency for frame 1 (910) of the display device (100) is 24 Hz (41.5 ms when converted to time (s)), the display device (100) can identify the multiplication value (16.64) based on the output time (2.5 ms) for one frame (910-1) among the multiple frames and the output time (41.5 ms) for frame 1 (910).

[0117] For example, when the display device (100) multiplies frame 1 (910) by 16, it can identify an overplus-time (920) of 1.6 ms, that is, a time corresponding to 0.64 multiplication of one frame among multiple frames.

[0118] FIG. 10 and FIG. 11 are drawings for explaining a method of compensating a frame drive signal according to one or more embodiments.

[0119] According to one embodiment, the display device (100) can identify PWM (Pulse Width Modulation) signals of multiple frames displayed in each frame section based on frame multiplication information.

[0120] Referring to FIGS. 10 and 11, the display device (100) can identify a frequency signal (or frame rate) of multiple frames for each frame section.

[0121] The display device (100) can identify a PWM waveform graph (1010, 1020, 1110, 1120) that uses voltage values ​​and driving times as variables based on the frequency signals of each of a plurality of frames.

[0122] In the PWM waveform graph (1010, 1020, 1110, 1120), the horizontal axis represents time, and the vertical axis represents the voltage value for driving a display pixel, for example, an LED.

[0123] The graphs (1030, 1130) located at the top of the PWM waveform graphs (1010, 1020, 1110, 1120) represent PWM signals for multiple frames, and the graphs (1040, 1140) located at the bottom represent vertical synchronization signals (Vsync). Here, the vertical synchronization signal refers to a signal for synchronizing vertical readjustment of the display device (100) and a signal for identifying the starting point of each frame output by the display (110).

[0124] According to one embodiment, the display device (100) can identify the point in time at which each frame included in the image is output based on a vertical synchronization signal. According to one example, the display device (100) can identify a frame refresh rate based on the vertical synchronization signal and identify overplus-time based on the frame refresh rate. For example, the display device (100) can identify the start and end points of each frame section based on the frame refresh rate and identify overplus-time based thereon. In addition, the display device (100) can identify the point in time at which each of the plurality of frames is output based on a vertical synchronization signal corresponding to each of the plurality of frames in which each frame is multiplied.

[0125] According to one embodiment, the display device (100) may compensate for the application time of the voltage corresponding to the PWM signal of the last frame among the plurality of frames based on the overplus-time. According to one embodiment, the display device (100) may increase the application time of the voltage corresponding to the PWM signal of the last frame among the plurality of frames by the overplus-time.

[0126] According to an example, the display device (100) can control the driving time of the last frame among a plurality of frames by the overplus-time. Referring to FIG. 10, the display device (100) can identify the overplus-time (1070) between the PWM signal (1050) of the last frame of frame 1 and the PWM signal (1060) of the first frame of frame 2 in the PWM signal (1030) for the plurality of frames. The display device (100) can compensate the driving time of the last frame, i.e., the on-time of the last frame, by the overplus-time. Accordingly, the display device (100) can identify a PWM driving signal (1080) in which the driving time of the last frame among a plurality of frames is increased compared to the driving times of the remaining frames.

[0127] For example, as shown in FIG. 9, the display device (100) can control the driving time of the last frame to output 4.1 ms, which is 1.6 ms of overplus-time, and the driving time of the last frame among multiple frames, which is 1.6 ms added.

[0128] According to one embodiment, the display device (100) can control the driver IC provided in the display (110) to apply the same power to all of the plurality of frames. The display device (100) can control the driver IC to apply power including the same time and voltage value to each frame in order to output the same luminance (screen brightness) to all of the plurality of frames. For example, the display device (100) can control the driver IC to apply power including a value of 1 V, 10 ms to each frame.

[0129] However, if the same power as the remaining frames is applied to the last frame among the plurality of frames during the first frame period while the on-time is increased, the display device (100) can output a frame in which the amplitude, i.e., the voltage value, of the last frame is reduced. In other words, the display device (100) outputs the last frame in a state in which the on-time is increased and has a lower brightness than the remaining frames except for the last frame among the plurality of frames during the first frame period.

[0130] According to one embodiment, the display device (100) can compensate for the brightness of the last frame by compensating for the amplitude corresponding to the PWM signal of the last frame among a plurality of frames during the first frame period.

[0131] According to one embodiment, the display device (100) may compensate for the amplitude of the voltage corresponding to the last frame based on the amplitude of the voltage corresponding to the remaining frames among the plurality of frames during the first frame period. According to one example, the display device (100) may increase the amplitude of the voltage corresponding to the last frame so as to correspond to the amplitude of the voltage corresponding to the remaining frames.

[0132] Referring to FIG. 11, the display device (100) can output the last frame (1160) with a relatively lower amplitude than the amplitude of the remaining frames (1150) among the plurality of frames during the first frame period. In other words, the display device (100) can output the last frame (1160) with a relatively lower voltage than the voltage of the remaining frames (1150) during the first frame period. That is, since the display device (100) applies the same power to each frame through the driver IC, the last frame with an increased on-time is output with a lower brightness than the remaining frames.

[0133] To compensate for this, the display device (100) can equalize the PWM signal based on the driving voltage of the last frame during the first frame period and the driving voltage of the remaining frames. PWM signal equalization refers to a process for controlling the voltage value of the PWM signal for each frame to be the same.

[0134] For example, as illustrated in FIG. 9, the display device (100) can increase the driving time of the last frame to 4.1 ms based on the overplus-time. For example, if the display device (100) applies the same voltage of 1 V to each frame through the driver IC, and the driving time increases for the last frame, an amplitude value of 0.61 V can be calculated by multiplying the voltage of 1 V by a ratio equal to the increased driving time. In this case, the display device (100) can additionally apply 0.39 V for PWM signal equalization to the last frame by controlling the driver IC.

[0135] For example, the display device (100) can output a driving signal (1170) having the same voltage value as the remaining frames by applying additional voltage to the last frame through PWM signal equalization.

[0136] As described above, the display device (100) can compensate for the driving time and amplitude of the last frame among a plurality of frames to prevent a flicker phenomenon that occurs between the last frame corresponding to frame 1 and the first frame corresponding to frame 2.

[0137] FIG. 12 is a diagram for explaining a method for providing a UI including distribution information according to one or more embodiments.

[0138] According to one embodiment, the display device (100) may provide a UI including multiplication information according to a plurality of shutter angle information corresponding to each of a plurality of shutter speed information stored in the memory (120) through the display (110).

[0139] According to one embodiment, the display device (100) may provide a UI including a lookup table including multiplication information calculated based on shutter speed information and shutter angle information through the display (110). A lookup table refers to data in the form of a table that stores result values ​​calculated in advance based on continuous values ​​or specific values. However, the lookup table is not limited thereto and may be referred to in various ways such as a search table, a mapping table, an index table, etc., but in the present disclosure, it is collectively referred to as a lookup table.

[0140] Referring to FIG. 12, the display device (100) may provide a UI including a plurality of shutter angle information corresponding to each of a plurality of shutter speed information through the display (110). The display device (100) may provide a UI including frame rate information corresponding to specific shutter speed information and specific shutter angle information through the display (110).

[0141] For example, when a driving frequency (1210) for an output image of a display device (100) is input, the display device (100) can provide a UI including a plurality of shutter speed information (1220), shutter angle information (1230), and multiplication information (1240) through the display (110).

[0142] For example, the display device (100) may provide a UI including the most commonly used shutter speed information, shutter angle information, and multiplication information. For example, the display device (100) may provide a UI including multiplication information for shutter speed information of 24 Hz and 48 Hz and shutter angle information of 180 degrees and 192 degrees, respectively, through the display (110).

[0143] According to one embodiment, when one of the multiplication information provided through the UI is selected based on a user input, the display device (100) can identify the multiplication information of the frame based on the selected multiplication information. For example, when the display device (100) receives a user input for a shutter speed of 24 Hz and a shutter angle of 180 degrees, the display device (100) can identify the multiplication information corresponding to the received shutter speed and shutter angle.

[0144] For example, the display device (100) may provide a user with a lookup table including shutter speed information, shutter angle information, and multiplication information, and receive user input based on the lookup table. The display device (100) may multiply frames based on the user input. The display device (100) may compensate for the application time and amplitude of a voltage corresponding to a driving signal of the last frame among a plurality of frames.

[0145] For example, the display device (100) may receive user input according to a specific shutter speed and a specific shutter angle. The display device (100) may multiply frames based on the user input and compensate for the voltage application time and amplitude of the last frame among a plurality of frames.

[0146] According to one embodiment, the display device (100) may include an LED display including a plurality of LED pixels. The display device (100) may multiply the driving frequency of the LED display to correspond to a plurality of frames displayed in each frame section based on frame multiplication information. The display device (100) may synchronize the shooting of the shooting device (200) and the driving of the LED display based on the multiplied driving frequency.

[0147] According to one embodiment, the display device (100) can display a background image on the display (110) by multiplying frames corresponding to the background image. The photographing device (200) can obtain an image of the background image displayed on the display (110) and a user positioned in front of the background image.

[0148] FIG. 13 is a drawing for explaining a method of controlling a display device according to one or more embodiments of the present disclosure.

[0149] Referring to FIG. 13, in operation 1310, the display device (100) can identify shutter speed information and shutter angle information corresponding to the photographing device (200).

[0150] In operation 1320, the display device (100) can identify frame multiplication information based on the identified shutter speed information and the identified shutter angle information.

[0151] In operation 1330, the display device (100) can identify a driving signal of a plurality of frames displayed in each frame section based on frame multiplication information.

[0152] In operation 1340, the display device (100) can compensate for the application time and amplitude of the current corresponding to the driving signal of the last frame when the interval of each frame is longer than the time for displaying multiple frames.

[0153] At operation 1350, the display device (100) can control the display (110) to provide the last frame based on the compensated driving signal.

[0154] The method of identifying the frame multiplication information based on the shutter speed information and shutter angle information and compensating the current application time and amplitude corresponding to the driving signal of the last frame has been specifically described in the various embodiments described above, so a redundant description is omitted.

[0155] The control method described in FIG. 13 can be performed by a display device (100) having the configuration of FIG. 2 described above, but is not necessarily limited thereto, and can also be performed by a display device having various configurations.

[0156] The various embodiments described above may be implemented as a single embodiment, or at least one embodiment may be combined with each other in whole or in part and implemented together in one device.

[0157] According to the various embodiments described above, the display device can output continuous frames without screen cut-off and flicker phenomenon for each frame when taking pictures according to various shutter speeds and shutter angles of the photographing device.

[0158] Meanwhile, the various embodiments described above may be applied to a product as an embodiment alone, but at least some of the contents may be implemented in combination with other embodiments of the present disclosure.

[0159] The various embodiments described above can be implemented as software including instructions stored in a machine-readable storage medium that can be read by a machine (e.g., a computer). The device is a device that can call instructions stored from the storage medium and operate according to the called instructions, and may include an electronic device (e.g., a display device (100)) according to the disclosed embodiments. When an instruction is executed by a processor, the processor can perform a function corresponding to the instruction directly or by using other components under the control of the processor. The instruction may include code generated or executed by a compiler or interpreter. The machine-readable storage medium can be provided in the form of a non-transitory computer-readable storage medium. Here, 'non-transitory' means that the storage medium does not contain a signal and is tangible, but does not distinguish between data being stored semi-permanently or temporarily in the storage medium.

[0160] Additionally, according to one embodiment of the present disclosure, the method according to the various embodiments described above may be provided as included in a computer program product.

[0161] Specifically, a non-transitory computer-readable storage medium or a computer program product storing computer instructions for causing an operation to be performed, including a step of identifying shutter speed information and shutter angle information corresponding to a photographing device, a step of identifying frame multiplication information based on the identified shutter speed information and the identified shutter angle information, a step of identifying drive signals of a plurality of frames displayed in each frame section based on the frame multiplication information, a step of compensating for the application time and amplitude of a voltage corresponding to the drive signal of the last frame when the section of each frame is longer than the time for displaying the plurality of frames, and a step of controlling a display to provide the last frame based on the compensated drive signal, may be provided.

[0162] The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or online through an application store (e.g., Play Store™). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created in a storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0163] In addition, computer instructions or programs for performing the control method of the display device according to the various embodiments described above may be stored in a non-transitory computer-readable medium. The computer instructions stored in such a non-transitory computer-readable medium, when executed by a processor of a specific device, cause the specific device to perform processing operations in the device according to the various embodiments described above. A non-transitory computer-readable medium refers to a medium that stores data semi-permanently and can be read by a device, rather than a medium that stores data for a short period of time, such as a register, cache, or memory. Specific examples of non-transitory computer-readable media may include a CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM, etc.

[0164] Although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person skilled in the art to which the present disclosure pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. In the display device, display; Memory that stores one or more instructions; comprising one or more processors; The one or more processors, by executing the one or more instructions, Identify the shutter speed information and shutter angle information corresponding to the shooting device, Identifying frame multiplication information based on the identified shutter speed information and the identified shutter angle information, Based on the above multiplication information, a driving signal is identified for repeatedly outputting the same frame as the original frame in each frame section, If the interval of each frame above is longer than the time for which each frame identical to the original frame is displayed, the application time and amplitude of the voltage corresponding to the driving signal for outputting the last frame identical to the original frame are compensated, A display device that controls the display to provide the last frame based on a driving signal based on the application time and amplitude of the compensated voltage.

2. In paragraph 1, The above driving signal is, A display device that uses a PWM (Pulse Width Modulation) signal.

3. In paragraph 2, The one or more processors, by executing the one or more instructions, Identifying overplus-time based on the difference between the time for displaying each frame section above and the time for displaying each frame that is identical to the original frame, Compensate the voltage application time corresponding to the PWM signal of the last frame based on the above overplus-time, A display device that compensates for the amplitude of the voltage of the PWM signal corresponding to the last frame based on the amplitude of the voltage corresponding to the PWM signal, which is a driving signal for outputting the remaining frames that are identical to the frames that are repeatedly output.

4. In paragraph 3, The one or more processors, by executing the one or more instructions, Increase the voltage application time corresponding to the PWM signal of the last frame by the above overplus-time, A display device that increases the amplitude of the voltage of the PWM signal corresponding to the last frame so as to correspond to the amplitude of the voltage of the PWM signal corresponding to the remaining frames.

5. In paragraph 1, It further includes a memory that stores multiplication information according to a plurality of shutter angle information corresponding to each of a plurality of shutter speed information; The one or more processors, by executing the one or more instructions, A display device that provides a UI including multiplication information according to a plurality of shutter angle information corresponding to each of the plurality of shutter speed information based on information stored in the memory through the display.

6. In paragraph 5, The one or more processors, by executing the one or more instructions, When one of the distribution information included in the above UI is selected based on user input, A display device that identifies the frame's frame information based on the selected frame information.

7. In paragraph 1, The one or more processors, by executing the one or more instructions, Identifying the time at which each frame is displayed based on the identified shutter speed information and the identified shutter angle information, A display device that identifies the frame resolution information based on the time at which each frame is displayed.

8. In paragraph 1, The multiplication information of the above frame is, A display device, which is information about the number of times the same frame is to be displayed in each frame section above.

9. In paragraph 1, The above display is, An LED display containing multiple LED pixels, The one or more processors, by executing the one or more instructions, A display device that synchronizes the shooting of the shooting device and the driving of the LED display by multiplying the driving frequency of the LED display to correspond to a plurality of frames displayed in each frame section based on the frame multiplication information of the frame.

10. In paragraph 1, The one or more processors, by executing the one or more instructions, Displaying the background image on the display by multiplying the frames corresponding to the background image, The above photographing device, A display device that acquires an image of a user positioned in front of the background image and the background image displayed on the display.

11. In a method for controlling a display device, A step of identifying shutter speed information and shutter angle information corresponding to a photographing device; A step of identifying frame multiplication information based on the identified shutter speed information and the identified shutter angle information; A step of identifying a driving signal for repeatedly outputting a frame identical to the original frame in each frame section based on the above multiplication information; A step of compensating for the application time and amplitude of a voltage corresponding to a driving signal for outputting the last frame identical to the original frame, if the interval of each frame above is longer than the time for displaying each frame identical to the original frame; and A control method comprising: a step of controlling a display to provide the last frame based on a driving signal based on the application time and amplitude of the compensated voltage; 12. In paragraph 11, The above driving signal is, A control method using a PWM (Pulse Width Modulation) signal.

13. In paragraph 12, The step of compensating the application time and amplitude of the voltage corresponding to the PWM signal of the last frame above is: A step of identifying overplus-time based on the difference between the time for displaying each frame section and the time for displaying each frame that is identical to the original frame; A step of compensating the application time of the voltage corresponding to the PWM signal of the last frame based on the overplus-time; and A control method further comprising: a step of compensating the amplitude of the voltage of the PWM signal corresponding to the last frame based on the amplitude of the voltage corresponding to the PWM signal, which is a driving signal for outputting the remaining frames that are identical to the frames that are repeatedly output.

14. In paragraph 13, A step of increasing the voltage application time corresponding to the PWM signal of the last frame by the overplus-time; and A control method comprising: a step of increasing the amplitude of the voltage of the PWM signal corresponding to the last frame so as to correspond to the amplitude of the voltage of the PWM signal corresponding to the remaining frames; 15. A non-transitory computer-readable storage medium storing computer instructions that, when executed by a processor of a display device, cause the display device to perform an operation, wherein the operation is: A step of identifying shutter speed information and shutter angle information corresponding to a photographing device; A step of identifying frame multiplication information based on the identified shutter speed information and the identified shutter angle information; A step of identifying a driving signal for repeatedly outputting a frame identical to the original frame in each frame section based on the above multiplication information; A step of compensating for the application time and amplitude of a voltage corresponding to a driving signal for outputting the last frame identical to the original frame, if the interval of each frame above is longer than the time for displaying each frame identical to the original frame; and A non-transitory computer-readable storage medium comprising: a step of controlling a display to provide the last frame based on a driving signal based on the application time and amplitude of the compensated voltage;

Images