Display device and operation method of display device

Abstract

A display device and an operation method thereof are provided. The display device may include: a display driven by being divided into a plurality of blocks; a memory; and a processor for executing an instruction stored in the memory, wherein the processor executes at least one instruction to cause the display device (100) to: calculate a plurality of duty ratios by which each of the plurality of blocks is driven in one frame on the basis of an obtained input image; calculate a first duty margin by using a first target duty ratio and a first reference duty ratio selected from among the calculated plurality of duty ratios; calculate a second duty margin by using a second target duty ratio determined by a relational expression between a driving duty ratio and a driving current of the display and a second reference duty ratio determined on the basis of the calculated plurality of duty ratios; determine a correction duty margin by comparing the first duty margin and the second duty margin; and drive the display with a plurality of final duty ratios and final driving currents determined by using the plurality of duty ratios and the correction duty margin.

Description

Display devices and methods of operating display devices

[0001] The present disclosure relates to a display device and a method of operating the display device. Specifically, the present disclosure relates to a display device including a display that is divided into a plurality of blocks and driven, and a method of operating the display device.

[0002] With the advancement of electronic device technology, operations are being performed to control the brightness of displays that display images.

[0003] Specifically, an operation utilizing local dimming technology that controls the amount of light by adjusting the duty ratio at which the display is driven in conjunction with an input image can be performed. In addition, the display can be divided into a plurality of blocks and operated, and an image can be displayed by adjusting the duty ratio of each block differently according to the input image corresponding to each block. In addition, an image can be displayed by controlling the size of the driving current to drive the display based on the duty ratio of each of the plurality of blocks of the display.

[0004] At this time, the display may include a backlight that emits light, and may also perform an operation of controlling the duty ratio and the size of the driving current of the backlight according to the input image.

[0005] One embodiment of the present disclosure provides a display device. The display device may include a display that is divided into a plurality of blocks and driven. The display device may include a memory that stores at least one instruction. The display device may include at least one processor that executes at least one instruction stored in the memory. By the at least one processor executing the at least one instruction, the display device may acquire an input image. By the at least one processor executing the at least one instruction, the display device may calculate a plurality of duty ratios at which each of the plurality of blocks is driven within one frame based on the acquired input image. By the at least one processor executing the at least one instruction, the display device may calculate a first duty margin using a first target duty ratio set in advance and a first reference duty ratio selected from among the calculated duty ratios. By the at least one processor executing the at least one instruction, the display device may calculate a second duty margin using a second target duty ratio determined by a relationship between a driving duty ratio and a driving current of a preset display and a second reference duty ratio determined based on the calculated duty ratios. By having at least one processor execute at least one command, the display device can determine a compensation duty margin by comparing the first duty margin and the second duty margin. By having at least one processor execute at least one command, the display device can drive the display with a plurality of final duty ratios determined using the plurality of duty ratios and the compensation duty margin, and a final driving current determined to correspond to the plurality of final duty ratios using a relational expression.

[0006] One embodiment of the present disclosure provides a method for operating a display device. The method for operating the display device may include a step of acquiring an input image. The method for operating the display device may include a step of calculating, based on the acquired input image, a plurality of duty ratios at which each of a plurality of blocks of a display, which is divided into a plurality of blocks and driven within one frame, is driven. The method for operating the display device may include a step of calculating a first duty margin using a first reference duty ratio selected from among a first target duty ratio set in advance and a plurality of calculated duty ratios. The method for operating the display device may include a step of calculating a second duty margin using a second target duty ratio determined by a relationship between a driving duty ratio and a driving current of a preset display and a second reference duty ratio determined based on the plurality of calculated duty ratios. The method for operating the display device may include a step of determining a correction duty margin by comparing the first duty margin and the second duty margin. A method of operating a display device may include driving the display with a plurality of final duty ratios determined using a plurality of duty ratios and a compensation duty margin, and a final driving current determined to correspond to the plurality of final duty ratios using a relational expression.

[0007] As one embodiment of the present disclosure, a computer-readable recording medium having recorded thereon a program for performing at least one method of the disclosed operating method on a computer may be provided.

[0008] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

[0009] The present disclosure may be understood in conjunction with the following detailed description and accompanying drawings, wherein reference numerals refer to structural elements.

[0010] FIG. 1 is a drawing for explaining the operation of a display device according to one embodiment of the present disclosure.

[0011] FIG. 2 is a diagram for explaining the relationship between the brightness and duty ratio of an image and the relationship between the brightness and driving current of an image according to one embodiment of the present disclosure.

[0012] FIG. 3 is a block diagram illustrating the configuration of a display device according to one embodiment of the present disclosure.

[0013] FIG. 4 is a flowchart for explaining the operation of a display device according to one embodiment of the present disclosure.

[0014] FIG. 5 is a flowchart illustrating the operation of a display device according to one embodiment of the present disclosure.

[0015] FIG. 6 is a flowchart illustrating the operation of a display device for calculating a first duty margin according to one embodiment of the present disclosure.

[0016] FIG. 7A is a diagram for explaining the operation of a display device for calculating a first duty margin according to one embodiment of the present disclosure.

[0017] FIG. 7b is a diagram for explaining the operation of a display device for calculating a first duty margin according to a region of interest and a region of non-interest according to one embodiment of the present disclosure.

[0018] FIG. 7c is a flowchart illustrating an operation of a display device for calculating a first duty margin according to motion of an input image according to one embodiment of the present disclosure.

[0019] FIG. 8A is a flowchart illustrating the operation of a display device for calculating a second duty margin according to one embodiment of the present disclosure.

[0020] FIG. 8B is a flowchart illustrating an operation of a display device for calculating a second duty margin according to a mode selection input for selecting a first mode or a second mode according to one embodiment of the present disclosure.

[0021] FIG. 9A is a flowchart for explaining the operation of a display device that calculates a second duty margin using a first relational expression used in a first mode according to one embodiment of the present disclosure and a second target duty ratio determined by the first relational expression.

[0022] FIG. 9b is a flowchart for explaining the operation of a display device that calculates a second duty margin using a second relational expression used in a second mode according to one embodiment of the present disclosure and a second target duty ratio determined by the second relational expression.

[0023] FIG. 10 is a flowchart illustrating the operation of a display device for determining a compensation duty margin according to one embodiment of the present disclosure.

[0024] FIG. 11 is a diagram for explaining a plurality of final duty ratios determined using a correction duty margin according to one embodiment of the present disclosure.

[0025] FIG. 12 is a diagram for explaining a final driving current determined using a correction duty margin according to one embodiment of the present disclosure.

[0026] The terms used in this disclosure will be briefly explained, and one embodiment of the present disclosure will be specifically described.

[0027] The terms used in this disclosure are selected from widely used, current terms, taking into account the functions of one embodiment of the 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 embodiments of the disclosure. Therefore, the terms used in this disclosure should not be defined simply as names of terms, but rather based on the meanings of the terms and the overall content of the disclosure.

[0028] Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art described herein.

[0029] Throughout this disclosure, when a part is said to "include" a component, this does not exclude other components, but rather implies the inclusion of other components, unless otherwise specifically stated. Furthermore, terms such as "part," "module," and the like described herein refer to a unit that processes at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

[0030] The expression “configured to” as used herein can be used interchangeably with, for example, “suitable for,” “having the capacity to,” “designed to,” “adapted to,” “made to,” or “capable of.” The term “configured to” does not necessarily mean something that is “specifically designed to” in terms of hardware. Instead, in some contexts, the expression “a system configured to” can mean that the system is “capable of” doing something together with other devices or components. For example, the phrase “a processor configured (or set) to perform A, B, and C” may mean a dedicated processor (e.g., an embedded processor) for performing those operations, or a generic-purpose processor (e.g., a CPU or application processor) that can perform those operations by executing one or more software programs stored in memory.

[0031] Additionally, when a component is referred to as being “connected” or “connected” to another component in the present disclosure, it should be understood that the component may be directly connected or connected to the other component, but may also be connected or connected via another component in between, unless otherwise specifically stated.

[0032] Below, with reference to the attached drawings, embodiments of the present disclosure are described in detail so that those skilled in the art can easily implement the present disclosure. However, one embodiment of the present disclosure may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in the drawings, parts irrelevant to the description are omitted to clearly describe one embodiment of the present disclosure, and similar parts are designated with similar drawing reference numerals throughout the present disclosure.

[0033] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0034] FIG. 1 is a diagram for explaining the operation of a display device according to one embodiment of the present disclosure. FIG. 2 is a diagram for explaining the operation of a display device according to one embodiment of the present disclosure.

[0035] Referring to FIG. 1, in one embodiment, the display device (100) may be a device that displays an image (120) and provides it to a user. In one embodiment, the display device (100) includes a display (110) and may display an image (120) on the display (110). The display device (100) may display an image (120) on the display (110) and provide it to a user.

[0036] In one embodiment, referring to FIG. 1, the display device (100) is illustrated as having the shape of a television, but the present disclosure is not limited thereto. The display device (100) may be implemented as a display device of various shapes, such as a digital signage, a projector, a mobile device, a smart phone, a laptop computer, a desktop, a tablet PC, a wearable device, a head-mounted display (HMD) device, and the like.

[0037] In one embodiment, the display (110) may display an image (120) across a plurality of frames. The display device (100) may control the display (110) to refresh and display the image in each of the plurality of frames.

[0038] In one embodiment, the length of each of the plurality of frames may be determined by the driving frequency of the display (110). The display device (100) may control the display (110) to display the image (120) at the driving frequency. In one embodiment, the driving frequency may be a frequency at which the image (120) on the display (110) is refreshed. In one embodiment, the driving frequency may be set to various frequencies such as 1 Hz (Hertz), 30 Hz, 60 Hz, 90 Hz, 120 Hz, 240 Hz, and the like, and is not limited to any one. In one embodiment, the driving frequency may be set to various frequencies depending on the type of image displayed on the display (110), movement of an object within the image, power consumption of the display device (100), and the like.

[0039] In one embodiment, the luminance of an image (120) displayed through a display (110) may be determined by a driving current (130) provided to the display (110). In one embodiment, the display device (100) may control the waveform of the driving current (130) for driving the display (110).

[0040] In one embodiment, the display device (100) can control the ratio of the turn-on period (132) and the turn-off period of the driving current within one frame (131). At this time, the ratio of the length of the turn-on period (132) and the length of one frame (131) can be referred to as a duty ratio. In one embodiment, the display device (100) can control the magnitude (133) of the driving current in the turn-on period (132). In one embodiment, as the length of the turn-on period (132) increases, the brightness of the image (120) can increase. In one embodiment, as the magnitude (133) of the driving current in the turn-on period (132) increases, the brightness of the image (120) can increase.

[0041] In one embodiment, the area (134) of the turn-on period, which is the product of the length of the turn-on period (132) of the driving current (130) and the magnitude (133) of the driving current in the turn-on period (132), may correspond to the power consumption of the display device (100). In one embodiment, the area (134) of the turn-on period and the power consumption of the display device (100) may be proportional.

[0042] Referring to FIGS. 1 and 2, FIG. 2 illustrates a first graph (200) representing a relationship between image luminance and duty ratio, and a second graph (210) representing a relationship between image luminance and driving current. In one embodiment, the x-axis of the first graph (200) may represent the duty ratio, and the y-axis may represent image luminance. The x-axis of the second graph (210) may represent the driving current, and the y-axis may represent image luminance.

[0043] In one embodiment, the first graph (200) and the second graph (210) illustrate a slope (220) indicating a proportional relationship. In one embodiment, referring to the first graph (200), the luminance and duty ratio of the image may have a proportional relationship corresponding to the slope (220). In one embodiment, as the length of the turn-on period (132) within a frame increases and the duty ratio increases, the luminance of the image may also increase proportionally.

[0044] In one embodiment, referring to the second graph (210), as the magnitude of the driving current (133) increases, the brightness of the image also increases. However, compared to the first graph (200), as the magnitude of the driving current (133) increases, the degree to which the brightness of the image increases may decrease.

[0045] In one embodiment, based on the first graph (200), the difference between the brightness of the first graph (200) and the image may be referred to as a 'loss degree'. When the loss degree when the driving current has a first magnitude is referred to as a first loss degree (230), and the loss degree when the driving current has a second magnitude greater than the first magnitude is referred to as a second loss degree (240), the second loss degree (240) may be greater than the first loss degree (230).

[0046] In one embodiment, the brightness of the image (120) can be determined by the length of the turn-on period (132) and the magnitude (133) of the driving current in the turn-on period (132).

[0047] Specifically, the turn-on period (132) may be a period in which an image (120) is displayed within a single frame. The turn-off period may be a period in which an image (120) is not displayed within a single frame. Accordingly, as the length of the turn-on period (132) increases, the period in which an image (120) is displayed within a single frame also increases, and the brightness of the image (120) displayed during a plurality of frames may increase. In one embodiment, as the duty ratio increases, the brightness of the image (120) may increase.

[0048] In addition, the magnitude (133) of the driving current in the turn-on section (132) can determine the intensity of the brightness of the image displayed in the turn-on section (132). Accordingly, as the magnitude (133) of the driving current increases, the brightness of the image (120) during the section in which the image (120) is displayed within one frame increases, so that the brightness of the image (120) displayed for multiple frames can increase.

[0049] In one embodiment, the power consumption of the display device (100) may be determined by the product of the length of the turn-on period (132) and the magnitude (133) of the driving current in the turn-on period (132). Therefore, the display device (100) may control the brightness of the image (120) displayed on the display (110) and the power consumption of the display device (100) by adjusting the length of the turn-on period (132) and the magnitude (133) of the driving current in the turn-on period (132). The display device (100) may control the brightness of the image (120) displayed on the display (110) and the power consumption of the display device (100) by adjusting the duty ratio and the magnitude (133) of the driving current. Hereinafter, for convenience of explanation, adjusting the length of the turn-on period (132) will be described as adjusting the duty ratio.

[0050] In one embodiment, the display device (100) can adjust the duty ratio to maintain a constant power consumption and provide an image (120) with uniform brightness, and can adjust the size (133) of the driving current in response to the adjusted duty ratio. In one embodiment, the display device (100) can analyze the image (120) to be displayed and determine the duty ratio. In one embodiment, the display device (100) can adjust the duty ratio and the size (133) of the driving current to have the same turn-on area (134) in order to maintain a constant power consumption.

[0051] In one embodiment, when the duty ratio determined according to the image (120) to be displayed decreases, the magnitude (133) of the driving current provided to the display (100) may increase. In one embodiment, when the duty ratio determined according to the image (120) to be displayed increases, the magnitude (133) of the driving current provided to the display (100) may decrease.

[0052] At this time, referring to the first graph (200) and the second graph (210), due to the difference between the first loss degree (230) and the second loss degree (240), the luminance when the duty ratio is low and the magnitude of the driving current (133) is large may be lower than the luminance when the duty ratio is high and the magnitude of the driving current (133) is small at the same power consumption. Accordingly, even if the same power consumption is required to drive the display (110), the luminance of the image (120) displayed on the display (110) may be different.

[0053] In addition, in one embodiment, the display device (100) can adjust the duty ratio and the magnitude of the driving current (133) so that the luminance of the image (120) displayed on the display (110) is uniform. In this case, when the luminance of the image (120) is the same, the power consumption when the duty ratio is low and the magnitude of the driving current (133) is large may be greater than the power consumption when the duty ratio is high and the magnitude of the driving current (133) is small. Accordingly, the power consumption when the display (110) is driven to display an image (120) having uniform luminance may be different.

[0054] Accordingly, the display device (100) of the present disclosure can analyze an input image to calculate a duty ratio, and use the calculated duty ratio and a preset target duty ratio to calculate a first duty margin for a turn-on section within one frame (131).

[0055] In addition, the display device (100) of the present disclosure can calculate a second duty margin using a target duty ratio determined by a relationship between a preset driving duty ratio and a driving current of the display (110) and the calculated duty ratio. At this time, the second duty margin may be a margin for a driving current corresponding to the calculated duty ratio and a minimum current required to drive the display (110).

[0056] In one embodiment, the display device (100) can determine a compensation duty margin by comparing the first duty margin and the second duty margin. The display device (100) can drive the display (110) with a final duty ratio determined using the compensation duty margin and a final driving current (135) determined to correspond to the final duty ratio.

[0057] At this time, the final duty ratio may be higher than the duty ratio determined by analyzing the input image. The length of the turn-on section (136) according to the final duty ratio may be longer than the length of the turn-on section (132) according to the duty ratio determined by analyzing the input image. The size of the final driving current (137) may be smaller than the size of the driving current (133) corresponding to the duty ratio determined by analyzing the input image.

[0058] Accordingly, when the display device (100) is operated so that the brightness of the image (120) displayed on the display (110) is uniform, the power consumption when the final driving current (135) is provided to the display (110) may be lower than the power consumption when the driving current (130) is provided to the display (110). In one embodiment, the area (138) of the turn-on period (136) obtained by multiplying the length of the turn-on period (136) of the final driving current (135) and the magnitude (137) of the final driving current in the turn-on period (136) may be smaller than the area (134) of the driving current (130). Therefore, the display device (100) can control the display (110) to display an image (120) of uniform brightness with low power consumption.

[0059] In addition, when the display device (100) is operated to maintain a constant power consumption, the brightness of the image (120) when the final driving current (135) is provided to the display (110) may be higher than the brightness of the image (120) when the driving current (130) is provided to the display (110). In this case, in one embodiment, the area (138) of the turn-on period of the final driving current (135) may be equal to the area (134) of the turn-on period of the driving current (130). Therefore, the display device (100) can control the display (110) to display an image (120) of high brightness with the same power consumption.

[0060] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the present disclosure.

[0061] In one embodiment, the display (110) may include a backlight that provides light. In one embodiment, the display (110) may display an image (110) using the light provided by the backlight. In this case, the driving current (130) and the final driving current (135) may be currents for controlling the backlight. The display device (100) may provide the driving current (130) or the final driving current (135) to the backlight to provide light for displaying the image (110).

[0062] In addition, although FIG. 1 illustrates that the display device (100) provides a driving current (130) or a final driving current (135) to the display (110), the present disclosure is not limited thereto. Depending on the type of the display (110) for displaying the image (120) and the operating method of the display device (100), the waveform illustrated in FIG. 1 may be a waveform corresponding to the driving voltage or the final driving voltage that the display device (100) provides to the display (110). In this case, the duty ratio may be the ratio of the length of one frame (131) to the length of the turn-on period of the driving voltage or the final driving voltage. The area of ​​the turn-on period may be the product of the length of the turn-on period and the magnitude of the driving voltage in the turn-on period.

[0063] FIG. 3 is a block diagram illustrating the configuration of a display device according to one embodiment of the present disclosure.

[0064] Referring to FIGS. 1 and 3, in one embodiment, the display device (100) may include a display (110), a memory (300), at least one processor (310), an input / output interface (320), and a communication interface (330). However, not all of the components illustrated in FIG. 3 are essential components. The display device (100) may be implemented with more components than the components illustrated in FIG. 3, or may be implemented with fewer components. The display (110), the memory (300), at least one processor (310), the input / output interface (320), and the communication interface (330) may each be electrically and / or physically connected to one another.

[0065] In one embodiment, the display (110) may include a liquid crystal display. In one embodiment, the display (110) may include a backlight and a color filter. In one embodiment, the backlight may generate light. The light generated by the backlight may pass through the color filter and be provided to the user as an image (120). The display (110) may provide the image (120) to the user through the backlight and the color filter. In one embodiment, the backlight may include a light emitting diode. However, the present disclosure is not limited thereto, and the backlight may include components known to perform the function of generating light.

[0066] However, the present disclosure is not limited thereto, and the display (110) may include a display that generates light by itself to provide an image (120), such as an organic light emitting diode display or an inorganic light emitting diode display. In this case, the display (110) may not include a backlight. However, the present disclosure is not limited thereto, and the display (110) may include another type of display that can provide an image (120) to a user. In addition, depending on the operating method of the display (110), the organic light emitting diode display or the inorganic light emitting diode display may also include a backlight.

[0067] In one embodiment, the display (110) may be driven by dividing it into a plurality of blocks. At least one processor (310) may control the display (110) to be driven by dividing it into a plurality of blocks to display an image (120). In one embodiment, if the display (110) includes a plurality of pixels, each of the plurality of blocks may correspond to at least one pixel.

[0068] In one embodiment, when the display (110) includes a backlight, the backlight may be driven by dividing it into a plurality of blocks. At least one processor (310) may control the backlight to be driven by dividing it into a plurality of blocks to display an image (120). In one embodiment, when the backlight includes a plurality of light sources (e.g., light-emitting diodes), each of the plurality of blocks may correspond to at least one light source.

[0069] Hereinafter, multiple blocks will be described later in FIGS. 7a and 7b.

[0070] In one embodiment, the memory (300) may include at least one of a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (e.g., SD or XD memory, etc.), a RAM (Random Access Memory), a SRAM (Static Random Access Memory), a ROM (Read-Only Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), a PROM (Programmable Read-Only Memory), a Mask ROM, a Flash ROM, etc.), a hard disk drive (HDD), or a solid state drive (SSD). The memory (300) may store instructions or program codes for performing functions or operations of the display device (100). The instructions, algorithms, data structures, program codes, and application programs stored in the memory (300) may be implemented in a programming or scripting language such as, for example, C, C++, Java, or an assembler.

[0071] In one embodiment, the memory (300) may store various types of modules that can be used to provide an image (120) to a user through the display (110). In addition, the memory (300) may store various types of modules that can be used to control the length of the driving duty and the intensity of the driving current for driving the display (110).

[0072] In one embodiment, the memory (300) may store a duty ratio calculation module (301), a driving current calculation module (302), a first duty margin calculation module (303), a second duty margin calculation module (304), and a correction duty margin calculation module (305). However, not all of the modules illustrated in FIG. 3 are essential modules. The memory (300) may store more or fewer modules than the modules illustrated in FIG. 3.

[0073] A 'module' included in the memory (300) may refer to a unit that processes a function or operation performed by at least one processor (310). The 'module' included in the memory (300) may be implemented as software such as instructions, an algorithm, a data structure, or a program code.

[0074] In one embodiment, the duty cycle calculation module (301) may be configured with instructions or program codes related to an operation or function of calculating a plurality of duty cycles at which each of a plurality of blocks of the display (110) is driven, based on an input image acquired through an input / output interface (320).

[0075] In one embodiment, each of the plurality of blocks of the display (110) may be controlled to display an image (120) with a duty ratio determined based on an input image corresponding to the plurality of blocks. In one embodiment, the duty ratio calculation module (301) may be configured with instructions or program codes relating to an operation or function of calculating a plurality of duty ratios at which each of the plurality of blocks of the display (110), each corresponding to an input image, is driven based on the gradation, contrast ratio, color, sharpness, objects and background included in the input image, the shape of the object, or the position of the object of the input image.

[0076] In one embodiment, the duty ratio calculation module (301) may be configured with instructions or program codes related to an operation or function of calculating a duty ratio of a block corresponding to an area including a high grayscale in an input image among a plurality of blocks as high, and calculating a duty ratio of a block corresponding to an area including a low grayscale in an input image as low.

[0077] However, the present disclosure is not limited thereto, and the duty ratio calculation module (301) may be configured with commands or program codes regarding an operation or function of analyzing an input image and calculating a plurality of duty ratios at which each of a plurality of blocks of the display (110) is driven so as to improve the image quality of the input image by utilizing the fact that the time at which the image is displayed on the display (110) within one frame varies depending on the duty ratio.

[0078] In one embodiment, the duty ratio calculation module (301) may be configured with instructions or program codes related to an operation or function of selecting a second reference duty ratio from among a plurality of calculated duty ratios. The duty ratio calculation module (301) may be configured with instructions or program codes related to an operation or function of selecting the highest duty ratio from among a plurality of calculated duty ratios as the second reference duty ratio.

[0079] However, the present disclosure is not limited thereto, and the duty ratio calculation module (301) may be configured with instructions or program codes relating to an operation or function of dividing a plurality of blocks into a plurality of block groups having the same duty ratio based on a plurality of calculated duty ratios, and selecting the highest duty ratio among the duty ratios corresponding to the plurality of block groups when the number of at least one block included in each block group among the divided plurality of block groups is equal to or greater than a preset threshold value as a second reference duty ratio.

[0080] In one embodiment, at least one processor (310) can calculate a plurality of duty ratios at which each of a plurality of blocks included in the display (110) is driven within one frame based on an acquired input image by executing instructions or program codes of the duty ratio calculation module (301).

[0081] In one embodiment, at least one processor (310) may select a second reference duty ratio from among a plurality of calculated duty ratios by executing instructions or program codes of the duty ratio calculation module (301). At least one processor (310) may select the highest duty ratio from among the plurality of calculated duty ratios as the second reference duty ratio.

[0082] In addition, at least one processor (310) may divide a plurality of blocks into blocks having the same duty ratio based on the calculated plurality of duty ratios, and may select the highest duty ratio among the duty ratios corresponding to the blocks in which the number of blocks having the same duty ratio among the divided blocks is equal to or greater than a preset threshold value as the second reference duty ratio.

[0083] In one embodiment, the driving current calculation module (302) may be configured with instructions or program codes relating to an operation or function of calculating a driving current corresponding to a second reference duty ratio using a relationship between the driving duty ratio and the driving current of a preset display (110).

[0084] In one embodiment, the relationship between the driving duty ratio and the driving current of the preset display (110) may include a relationship set as a relationship between the driving duty ratio and the driving current for displaying an image (120) having a specific brightness, taking into account specifications such as the resolution and driving frequency of the display (110), the rated power of the display device (100), or the power consumption of the display device (100). However, the present disclosure is not limited thereto, and the relationship may include a relationship set as a relationship between the driving duty ratio and the driving current for displaying an image (120) with a specific power consumption.

[0085] In one embodiment, when the driving duty ratio of the display (110) is determined according to the relational expression, the corresponding driving current can be determined. The display (110) can be controlled by the driving duty ratio and driving current determined according to the relational expression. The relational expression will be described below with reference to FIGS. 9A and 9B.

[0086] In one embodiment, the driving current calculation module (302) may be configured with instructions or program codes related to an operation or function of calculating a final driving current based on a driving current calculated to correspond to a second reference duty ratio using a relational expression and a correction duty margin. In one embodiment, the driving current calculation module (302) may be configured with instructions or program codes related to an operation or function of calculating a final driving current determined to correspond to a plurality of final duty ratios determined using a relational expression and a correction duty margin. Hereinafter, the operation of calculating the final driving current will be described later with reference to FIGS. 10 to 12.

[0087] In one embodiment, at least one processor (310) may calculate a driving current corresponding to a second reference duty ratio using a relational expression by executing instructions or program codes of the driving current calculation module (302). In addition, at least one processor (310) may calculate a final driving current corresponding to a plurality of final driving duty ratios using the driving current calculated to correspond to the second reference duty ratio using the relational expression and a correction duty margin by executing instructions or program codes of the driving current calculation module (302).

[0088] In one embodiment, the first duty margin calculation module (303) may be configured with instructions or program codes related to an operation or function of calculating a first duty margin using a preset first target duty ratio and a calculated first reference duty ratio. In one embodiment, the first duty margin calculation module (303) may be configured with instructions or program codes related to an operation or function of calculating a first duty margin using the difference between the preset first target duty ratio and the calculated first reference duty ratio.

[0089] In one embodiment, the first target duty ratio may be a ratio set as the highest duty ratio at which the display (110) can be driven within a single frame. In this case, the first target duty ratio may be determined according to the specifications of the display (110). Additionally, the first target duty ratio may be a ratio set during the manufacturing stage of the display device (100).

[0090] In one embodiment, at least one processor (310) may calculate a first duty margin by executing instructions or program codes of a first duty margin calculation module (303) using a preset first target duty ratio and a calculated first reference duty ratio. At least one processor (310) may calculate a difference between the preset first target duty ratio and the calculated first reference duty ratio as the first duty margin. Hereinafter, an operation of calculating the first duty margin will be described later with reference to FIGS. 6 to 7C.

[0091] In one embodiment, the second duty margin calculation module (304) may be configured with instructions or program codes related to an operation or function of calculating a second duty margin using a second target duty ratio and a second reference duty ratio determined by a preset relationship. In one embodiment, the second duty margin calculation module (304) may be configured with instructions or program codes related to an operation or function of calculating a second duty margin using the difference between the second target duty ratio and the second reference duty ratio.

[0092] In one embodiment, the relationship may include a minimum driving current for driving the display (110) and a minimum driving duty ratio corresponding to the minimum driving current. In this case, the minimum driving current may be the minimum driving current that must be provided to display an image (120) on the display according to the specifications of the display (110). In one embodiment, the minimum driving current may be a current for operating the display (110). The minimum driving current and the minimum driving duty ratio may be ratios set during the manufacturing stage of the display device (100).

[0093] In one embodiment, at least one processor (310) may calculate a second duty margin by executing instructions or program codes of a second duty margin calculation module (304) using a second target duty ratio and a second reference duty ratio determined by a preset relational expression. At least one processor (310) may calculate the difference between the second target duty ratio and the second reference duty ratio as the second duty margin. Hereinafter, the operation of calculating the second duty margin will be described later with reference to FIGS. 8A to 9B.

[0094] In one embodiment, the correction duty margin calculation module (305) may be configured with instructions or program codes related to an operation or function of comparing the first duty margin and the second duty margin to determine the correction duty margin. In one embodiment, the correction duty margin calculation module (305) may be configured with instructions or program codes related to an operation or function of comparing the first duty margin and the second duty margin, and determining the first duty margin as the correction duty margin if the first duty margin is equal to or less than the second duty margin. The correction duty margin calculation module (305) may be configured with instructions or program codes related to an operation or function of comparing the first duty margin and the second duty margin, and determining the second duty margin as the correction duty margin if the second duty margin is less than the first duty margin.

[0095] In one embodiment, at least one processor (310) may compare a first duty margin and a second duty margin to determine a correction duty margin by executing instructions or program codes of a correction duty margin calculation module (305). At least one processor (310) may compare the first duty margin and the second duty margin by executing instructions or program codes of a correction duty margin calculation module (305) to determine the first duty margin as the correction duty margin if the first duty margin is equal to or less than the second duty margin. At least one processor (310) may compare the second duty margin and the first duty margin and determine the second duty margin as the correction duty margin if the second duty margin is less than the first duty margin.

[0096] In one embodiment, at least one processor (310) may be configured as at least one of a Central Processing Unit, a microprocessor, a Graphic Processing Unit, an Application Processor (AP), an Application Specific Integrated Circuits (ASICs), a Digital Signal Processor (DSPs), a Digital Signal Processing Device (DSPDs), a Programmable Logic Device (PLDs), a Field Programmable Gate Array (FPGAs), and a Neural Processing Unit or an artificial intelligence (AI) processor designed with a hardware structure specialized for learning and processing an artificial intelligence (AI) model, but is not limited thereto.

[0097] In one embodiment, at least one processor (310) may be configured as a circuit (Circuitry) such as a System on Chip (SoC) or an Integrated Circuit (IC).

[0098] In one embodiment, at least one processor (310) can execute various types of modules stored in the memory (300). In one embodiment, at least one processor (310) can execute a duty ratio calculation module (301), a driving current calculation module (302), a first duty margin calculation module (303), a second duty margin calculation module (304), and a correction duty margin calculation module (305) stored in the memory (300). In one embodiment, at least one processor (310) can execute at least one instruction that constitutes various types of modules stored in the memory (300).

[0099] In one embodiment, at least one processor (310) can execute various types of modules stored in the memory (300). At least one processor (310) can execute at least one instruction that constitutes the various types of modules stored in the memory (300). By executing the program or at least one instruction stored in the memory (300), at least one processor (310) can process data according to predefined operating rules.

[0100] In one embodiment of the present disclosure, at least one processor (310) can execute at least one module among a duty ratio calculation module (301), a driving current calculation module (302), a first duty margin calculation module (303), a second duty margin calculation module (304), or a correction duty margin calculation module (305) stored in a memory (300).

[0101] In one embodiment of the present disclosure, at least one processor (310) may include a plurality of processors. In one embodiment of the present disclosure, at least one module among the duty ratio calculation module (301), the driving current calculation module (302), the first duty margin calculation module (303), the second duty margin calculation module (304), or the correction duty margin calculation module (305) stored in the memory (300) may be executed by any one of the plurality of processors.

[0102] In one embodiment, the input / output interface (320) can receive input images from peripheral electronic devices, etc., under the control of at least one processor (310). In one embodiment, the input images can include still images or moving images. The input / output interface (320) can receive audio (e.g., voice signals, music signals, etc.) and additional information, etc., from external devices, etc., under the control of at least one processor (310). The input / output interface (320) can include at least one of an HDMI port (High-Definition Multimedia Interface port), a component jack, a PC port, or a USB port. However, the present disclosure is not limited thereto, and the input / output interface (320) can also include various types of interfaces that can receive input images from peripheral electronic devices.

[0103] In one embodiment, the communication interface (330) can perform data communication with an external server (not shown) under the control of at least one processor (310). In addition, the communication interface (330) can perform data communication not only with the external server but also with other peripheral electronic devices (not shown). The communication interface (330) can perform data communication with the server or other peripheral electronic devices using at least one of data communication methods including, for example, wired LAN, wireless LAN, Wi-Fi, Bluetooth, zigbee, Wi-Fi Direct (WFD), infrared Data Association (IrDA), Bluetooth Low Energy (BLE), Near Field Communication (NFC), Wireless Broadband Internet (Wibro), World Interoperability for Microwave Access (WiMAX), Shared Wireless Access Protocol (SWAP), Wireless Gigabit Alliance (WiGig), and RF communication.

[0104] In one embodiment, at least one processor (310) may receive a pre-calculated first relation, a pre-calculated second relation, a pre-set first target duty ratio, and a pre-set second target duty ratio from an external server or peripheral electronic devices through a communication interface (330).

[0105] Additionally, the present disclosure is not limited thereto, and at least one processor (310) may receive an input image from an external server (e.g., a web server or a cloud service) through a communication interface (330).

[0106] In one embodiment, the display device (100) may further include a user interface for obtaining user input. In one embodiment, the user interface may include a touch unit, a push button, a voice recognition unit, a motion recognition unit, etc. In one embodiment, the display device (100) may obtain a user input provided by a user through the user interface. In one embodiment, the display device (100) may obtain a user input from a user who touches, presses, provides a voice, or performs a motion such as a hand gesture on the user interface. In one embodiment, the user may provide a user input for selecting an operation mode of either a first mode or a second mode in the operation of the display device (100) described below through the user interface. The display device (100) may select either the first mode or the second mode based on the user input obtained through the user interface and perform an operation of the display device (100).

[0107] FIG. 4 is a flowchart illustrating the operation of a display device according to one embodiment of the present disclosure. FIG. 5 is a flowchart illustrating the operation of a display device according to one embodiment of the present disclosure.

[0108] Referring to FIGS. 1, 3, 4, and 5, in one embodiment, a method of operating a display device (100) may include a step (S100) of obtaining an input image. In one embodiment, in the step (S100) of obtaining an input image, at least one processor (310) may obtain the input image through an input / output interface (320). However, the present disclosure is not limited thereto, and at least one processor (310) may also obtain the input image through a communication interface (330). In addition, at least one processor (310) may read an input image stored in a memory (300).

[0109] In one embodiment, the operating method of the display device (100) may include a step (S200) of calculating a plurality of duty ratios at which each of a plurality of blocks of a display (110) driven by being divided into a plurality of blocks within one frame (131) is driven based on an acquired input image.

[0110] In one embodiment, in the step (S200) of calculating a plurality of duty ratios, at least one processor (310) can calculate a plurality of duty ratios by executing instructions or program codes of the duty ratio calculation module (301) to drive each of a plurality of blocks of the display (110) divided into a plurality of blocks and driven within one frame (131).

[0111] In one embodiment, the operating method of the display device (100) may include a step (S300) of calculating a first duty margin using a first target duty ratio set in advance and a first reference duty ratio selected from among a plurality of calculated duty ratios.

[0112] In one embodiment, in the step (S300) of calculating the first duty margin, at least one processor (310) may calculate the first duty margin by executing instructions or program codes of the first duty margin calculation module (303) using a first target duty ratio set in advance and a first reference duty ratio selected from among a plurality of calculated duty ratios. Hereinafter, the step (S300) of calculating the first duty margin will be described later with reference to FIGS. 6 to 7C.

[0113] In one embodiment, the operating method of the display device (100) may include a step (S400) of calculating a second duty margin using a second target duty ratio determined by a relationship between a driving duty ratio and a driving current of a preset display (110) and a second reference duty ratio selected from among a plurality of calculated duty ratios.

[0114] In one embodiment, the step (S400) of calculating the second duty margin may include a step (S410) of selecting an average duty ratio of the calculated plurality of duty ratios as the second reference duty ratio. The step (S400) of calculating the second duty margin may include a step (S420) of calculating the difference between the second target duty ratio and the second reference duty ratio as the second duty margin.

[0115] In one embodiment, in the step (S400) of calculating the second duty margin, at least one processor (310) may calculate the second duty margin by using a second target duty ratio determined by a relationship between the driving duty ratio and the driving current of the preset display (110) and a second reference duty ratio selected from among a plurality of calculated duty ratios by executing instructions or program codes of the second duty margin calculation module (304).

[0116] Hereinafter, the step (S400) of calculating the second duty margin will be described later in FIGS. 8a to 9b.

[0117] In one embodiment, the operating method of the display device (100) may include a step (S430) of applying a second reference duty ratio to a relationship between a preset driving duty ratio and a driving current, thereby determining a driving current corresponding to the second reference duty ratio. In one embodiment, the driving current may be a current provided to all of the plurality of blocks of the display (110). In one embodiment, a driving current of the same magnitude may be provided to each of the plurality of blocks of the display (110). Therefore, the driving current may be determined using the second reference duty ratio, which is an average duty ratio of the plurality of duty ratios.

[0118] In one embodiment, the operating method of the display device (100) may include a step (S500) of comparing a first duty margin and a second duty margin to determine a compensation duty margin.

[0119] In one embodiment, in the step (S500) of determining the correction duty margin, at least one processor (310) may compare the first duty margin and the second duty margin by executing instructions or program codes of the correction duty margin calculation module (305) to determine the correction duty margin. At least one processor (310) may compare the first duty margin and the second duty margin and determine the smaller duty margin among the two duty margins as the correction duty margin. At this time, if the two duty margins are the same, the same duty margin may be determined as the correction duty margin.

[0120] In one embodiment, the operating method of the display device (100) may include a step (S600) of driving the display (110) with a final driving current determined to correspond to the plurality of final duty ratios using a relational expression, and a plurality of final duty ratios determined using a correction duty margin.

[0121] In one embodiment, the step (S600) of driving the display (110) with a plurality of final duty ratios and a final driving current may include a step (S610) of calculating a plurality of final duty ratios using a correction duty margin and the plurality of duty ratios. In one embodiment, in the step (S610) of calculating a plurality of final duty ratios, the plurality of final duty ratios may be calculated by adding a correction duty margin to each of the plurality of duty ratios.

[0122] In one embodiment, the step (S600) of driving the display (110) with a plurality of final duty ratios and a final driving current may include a step (S620) of determining the final driving current using a correction duty margin. In one embodiment, in the step (S620) of determining the final driving current, the final driving current may be determined by adding a value of a current corresponding to a correction duty margin obtained using a relational expression to the driving current determined in the step (S430) of determining the driving current.

[0123] However, the present disclosure is not limited thereto. In one embodiment, in the step of determining the final driving current (S620), a final reference duty ratio may be determined based on a plurality of final duty ratios. In one embodiment, the final reference duty ratio may be an average duty ratio of the plurality of final duty ratios. In the step of determining the final driving current (S620), the final reference duty ratio may be applied to a relational expression to determine the final driving current.

[0124] In one embodiment, the final drive current may be a current commonly provided to each of a plurality of blocks of the display (110) operated at a plurality of final duty ratios.

[0125] In one embodiment, in the step (S600) of driving the display (110) with a plurality of final duty ratios and a final driving current, at least one processor (310) can control the display (110) with a plurality of final duty ratios and a final driving current to display an image (120).

[0126] In one embodiment, in the step (S610) of calculating a plurality of final duty ratios, at least one processor (310) can calculate a plurality of final duty ratios by adding a correction duty margin to each of the plurality of duty ratios by executing instructions or program codes of the duty ratio calculation module (301).

[0127] In one embodiment, in the step of determining the final driving current (S620), at least one processor (310) may determine the final driving current by adding a value of a current corresponding to a correction duty margin obtained using a relational expression to the driving current by executing instructions or program codes of the driving current calculation module (302). At least one processor (310) may determine the final driving current by applying the final driving current to the relational expression.

[0128] FIG. 6 is a flowchart illustrating the operation of a display device for calculating a first duty margin according to one embodiment of the present disclosure. Hereinafter, steps identical to those described in FIGS. 4 and 5 are assigned the same reference numerals, and redundant descriptions are omitted.

[0129] Referring to FIGS. 3, 4, and 6, in one embodiment, the step (S300) of calculating the first duty margin may include a step (S310) of selecting the highest duty ratio among the calculated plurality of duty ratios as the first reference duty ratio. The operating method of the display device (100) may include, after the step (S200) of calculating the plurality of duty ratios, a step (S310) of selecting the highest duty ratio among the calculated plurality of duty ratios as the first reference duty ratio.

[0130] In one embodiment, in the step (S310) of selecting a first reference duty ratio, at least one processor (310) may select the highest duty ratio among the calculated plurality of duty ratios as the first reference duty ratio by executing instructions or program codes of the duty ratio calculation module (301).

[0131] However, the present disclosure is not limited thereto, and the operating method of the display device (100) may include a step of dividing a plurality of blocks that divide the display (110) into a plurality of block groups having the same duty ratio based on the calculated plurality of duty ratios, and selecting the highest duty ratio among the plurality of duty ratios corresponding to the plurality of block groups in the case where the number of at least one block included in each block group among the plurality of divided block groups is greater than a preset threshold value, as a second reference duty ratio. In this case, the preset threshold value may be a value set to prevent a duty ratio corresponding to image data that does not affect the image quality of the image (120) due to abnormal data or noise or a small area among the input image from being selected as the first reference duty ratio.

[0132] In one embodiment, the step (S300) of calculating the first duty margin may include a step (S320) of calculating the difference between the first target duty ratio and the first reference duty ratio as the first duty margin.

[0133] In one embodiment, in the step of calculating the first duty margin (S320), at least one processor (310) may execute instructions or program codes of the first duty margin calculation module (303) to calculate the difference between the first target duty ratio and the first reference duty ratio as the first duty margin. At this time, the first duty margin may also be a ratio.

[0134] Although the step of selecting the first reference duty ratio (S310) and the step of calculating the first duty margin (S320) in FIG. 6 are depicted as being separate from each other, the present disclosure is not limited thereto. In one embodiment, the operation of selecting the first reference duty ratio and the operation of calculating the first duty margin may be performed in a single step.

[0135] FIG. 7A is a diagram for explaining the operation of a display device for calculating a first duty margin according to one embodiment of the present disclosure.

[0136] Referring to FIGS. 1, 3 and 7A, in one embodiment, FIG. 7A illustrates a display (110) driven by being divided into a plurality of blocks (700), and an image (120) displayed on the display (110).

[0137] In one embodiment, the display device (100) can control the display (110) to display an image (120) by driving a plurality of blocks (700) with a driving duty ratio corresponding to each block. The display device (100) can control the display (110) to display an image (120) by providing a common driving current to the plurality of blocks (700).

[0138] In one embodiment, when the display (110) includes a backlight, a plurality of blocks (700) may be a unit configuration in which the backlight operates. The backlight is divided into a plurality of blocks (700) and operated, and the plurality of blocks (700) may be driven with their own driving duty ratios. At this time, a driving current may be commonly provided to the plurality of blocks (700). Hereinafter, for convenience of explanation, the display (110) is described as being divided into a plurality of blocks (700) and operated, but this may also mean that, when the display (110) includes a backlight, the backlight is divided into a plurality of blocks (700) and operated.

[0139] In one embodiment, at least one processor (310) may analyze an input image to calculate a plurality of duty ratios (710) to drive each of the plurality of blocks (700). In one embodiment, at least one processor (310) may calculate a duty ratio of a block corresponding to an area with high grayscale in the input image to be higher than a duty ratio of a block corresponding to an area with low grayscale in the input image. However, the present disclosure is not limited thereto, and at least one processor (310) may calculate a plurality of duty ratios (710) to drive each of the plurality of blocks (700) by considering movement of an object included in the input image, distinction between the object and the background, contrast ratio with surrounding areas, sharpness of the input image, etc.

[0140] In one embodiment, referring to FIG. 7A, when a plurality of blocks (700) include a first block (701) and a second block (702), an input image corresponding to the first block (701) may include a 'human face'. An input image corresponding to the second block (702) may include a 'logo' or 'subtitle', etc.

[0141] In one embodiment, the plurality of duty ratios (710) may include a first duty ratio (711) corresponding to the first block (701) and a second duty ratio (712) corresponding to the second block (702). In this case, the first duty ratio (711) may correspond not only to the first block (701), but also to at least one other block among the plurality of blocks (700) that is calculated to be driven with the first duty ratio (711) based on an input image. The display device (100) may drive not only the first block (701), but also at least one other block with the first duty ratio (711).

[0142] In one embodiment, the first duty ratio (711) and the second duty ratio (712) may be different. If the grayscale of the input image corresponding to the second block (702) is higher than the grayscale of the input image corresponding to the first block (701), the second duty ratio (712) may be higher than the first duty ratio (711).

[0143] However, the present disclosure is not limited thereto, and if the duty ratio of the block corresponding to the 'logo' or 'subtitle' portion is preset to be calculated higher than the duty ratio of the block corresponding to the remaining portion of the image, the second duty ratio (712) may be higher than the first duty ratio (711) regardless of the gradation of the input image.

[0144] In addition, unlike as shown in Fig. 7a, if the duty ratio of a block corresponding to an object such as a 'person' is preset to be calculated higher than the duty ratio of a block corresponding to the remaining portion of the image such as a 'background', the first duty ratio (711) may be higher than the second duty ratio (712). That is, a plurality of duty ratios (710) corresponding to a plurality of blocks (700) may be calculated as different values ​​based on the input image.

[0145] In one embodiment, a preset first target duty ratio (720) is illustrated in FIG. 7A. In one embodiment, the first target duty ratio (720) may be the highest duty ratio at which the display (110) can be driven within one frame (131). In one embodiment, the length of one frame (131) may be determined according to the driving frequency of the display (110). The first target duty ratio (720) may be the ratio of the length of one frame (131) having a determined length and the longest turn-on period at which an image can be displayed on the display (110).

[0146] In one embodiment, the first reference duty ratio (712) may be the highest duty ratio among the plurality of duty ratios (710). FIG. 7A illustrates that the second duty ratio (712) is the first reference duty ratio (712).

[0147] In one embodiment, the first duty margin (730) may be the difference between the first target duty ratio (720) and the first reference duty ratio (712). In one embodiment, when the input image may have a gray scale from 0 to 255, the first target duty ratio (720) may be a duty ratio at which the display (110) is driven to display an image (120) corresponding to the input image including a 255 gray scale. The first reference duty ratio (712) may be a duty ratio at which the display (110) is driven to display an image (120) corresponding to the highest gray scale among the gray scales included in the input image.

[0148] In one embodiment, the first duty margin (730) when the highest gray scale among gray scales included in the input image is 200 gray scale may be smaller than the first duty margin (730) when the highest gray scale among gray scales included in the input image is 150 gray scale.

[0149] FIG. 7b is a diagram illustrating the operation of a display device that calculates a first duty margin according to a region of interest and a region of non-interest according to one embodiment of the present disclosure. Hereinafter, components identical to those described in FIG. 7a are assigned the same reference numerals, and redundant descriptions are omitted.

[0150] Referring to FIGS. 1, 3, 7a and 7b, in one embodiment, FIG. 7b illustrates a display (110) driven by being divided into a plurality of blocks (700) and an image (120) displayed on the display (110).

[0151] In one embodiment, referring to FIG. 7B, the plurality of blocks (700) may include a first block (701), a second block (702), and a third block (703). In one embodiment, the input image corresponding to the third block (703) may include a 'background'.

[0152] In one embodiment, the plurality of duty ratios (710) may include a first duty ratio (711) corresponding to a first block (701), a second duty ratio (712) corresponding to a second block (702), and a third duty ratio (713) corresponding to a third block (703).

[0153] In one embodiment, the grayscale of the input image corresponding to the third block (703) may be higher than the grayscale of the input image corresponding to the first block (701) and the grayscale of the input image corresponding to the second block (702). Accordingly, the third duty ratio (713) may be higher than the first duty ratio (711) and the second duty ratio (712).

[0154] In one embodiment, a preset threshold value (740) is illustrated in FIG. 7B. The threshold value (740) may be a preset value so that, if the number of blocks having a specific duty ratio is less than the threshold value, the duty ratio corresponding to the block is not selected as the first reference duty ratio. In one embodiment, if the third duty ratio (713) is higher than the second duty ratio (712), but the number of blocks having the third duty ratio (713) is lower than the threshold value, the third duty ratio (712), not the third duty ratio (713), may be selected as the first reference duty ratio. At least one processor (310) may determine the second duty ratio (712), not the third duty ratio (713), as the first reference duty ratio.

[0155] At this time, in order for the number of blocks having a specific duty ratio to be equal to or greater than the threshold value, the area of ​​the display (110) driven by the specific duty ratio may need to be larger than a certain area. Therefore, the threshold value (740) can be used to prevent a specific duty ratio driven in an area less than a certain area of ​​the display (110) from being determined as the first reference duty ratio. Through this, it is possible to prevent the compensation duty margin (1100, see FIG. 11) to be described later from being calculated low due to a specific duty ratio in an area where the area occupied by the image (120) is small and thus of low user interest.

[0156] In addition, FIG. 7B illustrates that the display (110) is divided into a region of interest (750) and a region of no interest (760) based on the input image. In one embodiment, the region of interest (750) may be a region among the images (120) displayed on the display (110) in which the user is determined to have relatively high interest. The region of no interest (760) may be a region among the images (120) displayed on the display (110) in which the user is determined to have relatively low interest.

[0157] In one embodiment, the region of interest (750) may be an area where an image containing an 'object (e.g., a person, an animal, an object, etc.)' is determined to be displayed based on an input image on the display (110). The region of non-interest (760) may be an area where an image containing a 'background' is determined to be displayed based on an input image on the display (110).

[0158] However, the present disclosure is not limited thereto, and the conditions for distinguishing between the region of interest (750) and the region of non-interest (760) can be set in advance, and at least one processor (310) can analyze the input image according to the set conditions to distinguish the display (110) into the region of interest (750) and the region of non-interest (760).

[0159] In one embodiment, at least one processor (310) may, when comparing the number of blocks having a threshold value and a specific duty ratio, assign different weights depending on whether the block is located in an area of ​​interest (750) or an area of ​​no interest (760). In one embodiment, at least one processor (310) may calculate by multiplying by a weight of 1 or more when comparing the number of blocks included in an area of ​​interest (750). At least one processor (310) may calculate by multiplying by a weight of less than 1 when comparing the number of blocks included in an area of ​​no interest (760).

[0160] Through this, in the case of blocks located in the area of ​​interest (750), even if the number of blocks having a specific duty ratio is small, when compared with the threshold value (740), it is determined that the number is equal to or greater than the threshold value (740), and thus may be considered in the selection of the first reference duty ratio. In the case of blocks located in the area of ​​non-interest (760), even if the number of blocks having a specific duty ratio is large, when compared with the threshold value (740), it is determined that the number is less than the threshold value (740), and thus may not be considered in the selection of the first reference duty ratio.

[0161] Through this, when calculating a plurality of final duty margins using the correction duty margin (1100) determined by comparing the first duty margin (730) and the second duty margin (970, see FIG. 9a) described later, it is possible to prevent the final duty margins of blocks located in the area of ​​interest (750) from exceeding the first target duty ratio (720). In addition, it is also possible to prevent the correction duty margin (1100) from being calculated unnecessarily low due to the duty ratios of blocks located in the area of ​​no interest (760) where the user's interest is low.

[0162] FIG. 7c is a flowchart illustrating the operation of a display device for calculating a first duty margin according to the motion of an input image according to one embodiment of the present disclosure. Hereinafter, steps identical to those described in FIGS. 4 and 5 are assigned the same reference numerals, and any redundant descriptions are omitted.

[0163] Referring to FIGS. 3, 4, 5, and 7C, in one embodiment, the method of operating the display device (100) may include a step (S210) of analyzing the motion of the input image based on the acquired input image. In this case, 'motion' may mean movement of an object included in the input image, change of the object, movement speed of the background, etc.

[0164] In one embodiment, at least one processor (310) may analyze an input image to analyze motion of the input image. In one embodiment, at least one processor (310) may set the first target duty ratio (720) to be lower as the motion of the input image increases.

[0165] Accordingly, the first duty margin calculated in the step of calculating the first duty margin (S300) can be calculated to be lower as the motion of the input image increases. Through this, when the motion of the input image is large, the compensation duty margin described later can be calculated to be lower, so as not to affect the Frame Rate Control (FRC) for displaying an image with large motion.

[0166] FIG. 8A is a flowchart illustrating the operation of a display device for calculating a second duty margin according to one embodiment of the present disclosure. Hereinafter, steps identical to those described in FIGS. 4 and 5 are assigned the same reference numerals, and any redundant descriptions are omitted.

[0167] Referring to FIGS. 3, 4, 5 and 8A, in one embodiment, the step of calculating the second duty margin (S400) may include a step of determining an average duty ratio of the calculated plurality of duty ratios as the second reference duty ratio (S410).

[0168] In one embodiment, the step (S410) of determining the average duty ratio of a plurality of duty ratios as the second reference duty ratio is illustrated in FIG. 8A as being performed after the step (S300) of calculating the first duty margin, but the present disclosure is not limited thereto. The step (S410) of determining the average duty ratio of a plurality of duty ratios as the second reference duty ratio may also be performed after the step (S200) of calculating the duty ratios for a plurality of blocks.

[0169] In one embodiment, in the step (S410) of determining an average duty ratio of a plurality of duty ratios as a second reference duty ratio, at least one processor (310) may calculate an average duty ratio of a plurality of duty ratios as the second reference duty ratio by executing instructions or program codes of a second duty margin calculation module (304). The second reference duty ratio may be a duty ratio used to determine a driving current of a display (110) to be described later. At this time, the driving current may be commonly provided to a plurality of blocks of the display (110), and thus the second reference duty ratio may be determined as an average duty ratio of a plurality of duty ratios corresponding to each of the plurality of blocks.

[0170] In one embodiment, the step (S400) of calculating the second duty margin may include the step (S420) of calculating the difference between the second target duty ratio and the second reference duty ratio as the second duty margin. Hereinafter, the step (S420) of calculating the second duty margin will be described later with reference to FIGS. 9A and 9B.

[0171] FIG. 8B is a flowchart illustrating the operation of a display device for calculating a second duty margin according to a mode selection input for selecting a first mode or a second mode according to one embodiment of the present disclosure. Hereinafter, steps identical to those described in FIGS. 4, 5, and 8A are assigned the same reference numerals, and redundant descriptions are omitted.

[0172] Referring to FIGS. 3, 4, 8a, and 8b, the method of operating the display device (100) may include a step (S421) of acquiring a mode selection input for selecting a first mode in which the brightness of the display (110) is maintained constant or a second mode in which the power consumption of the display (110) is maintained constant. In one embodiment, the brightness of the display (110) may mean the brightness of an image displayed on the display (110).

[0173] In one embodiment, the step (S421) of obtaining a mode selection input is illustrated in FIG. 8b as being performed after the step (S420) of selecting an average duty ratio of a plurality of duty ratios as a second reference duty ratio, but the operation sequence of the step (S421) of obtaining a mode selection input is not limited thereto.

[0174] In one embodiment, in the step of obtaining a mode selection input (S421), at least one processor (310) can obtain a user input for selecting either the first mode or the second mode through a user interface.

[0175] However, the present disclosure is not limited thereto. It may be preset whether the display device (100) operates in the first mode or the second mode. In this case, even if the step of acquiring a mode selection input is not performed, the display device (100) can operate in the selected mode.

[0176] In one embodiment, the operating method of the display device (100) may include a step (S422) of calculating a second duty margin using a second target duty ratio and a second reference duty ratio determined by a first relational expression, as the first mode is selected based on the acquired mode selection input. At this time, the first relational expression may be a relational expression set so that the driving current of the display (110) is also changed as the driving duty ratio of the display (110) is changed so that the luminance of the display (110) is maintained constant.

[0177] In one embodiment, at least one processor (310) may calculate a second duty margin using a second target duty ratio and a second reference duty ratio determined by a first relational expression, based on the first mode selection input obtained, as described below. The operation of calculating the first relational expression and the second duty margin using the first relational expression will be described later with reference to FIG. 9A.

[0178] In one embodiment, the operating method of the display device (100) may include a step (S423) of calculating a second duty margin using a second target duty ratio and a second reference duty ratio determined by a second relational expression, as the second mode is selected based on the acquired mode selection input. At this time, the second relational expression may be a relational expression set such that the driving current of the display (110) is also changed as the driving duty ratio of the display (110) is changed so that the power consumption of the display (110) is maintained constant.

[0179] In one embodiment, at least one processor (310) may calculate a second duty margin using a second target duty ratio and a second reference duty ratio determined by a second relational expression, based on the second mode being selected based on the acquired mode selection input. Hereinafter, the operation of calculating the second duty margin using the second relational expression and the second relational expression will be described later in FIG. 9B.

[0180] FIG. 9A is a flowchart for explaining the operation of a display device that calculates a second duty margin using a first relational expression used in a first mode according to one embodiment of the present disclosure and a second target duty ratio determined by the first relational expression.

[0181] Referring to FIGS. 2, 3, and 9A, in one embodiment, FIG. 9A illustrates a graph (900) representing a first relationship used in a first mode in which the brightness of the display (110) is maintained constant. Hereinafter, the graph (900) representing the first relationship will be referred to as a first mode graph (900), and the first relationship will be described using the first mode graph (900).

[0182] In one embodiment, the x-axis of the first mode graph (900) may be a second reference duty ratio. In one embodiment, the x-axis of the first mode graph (900) may be an average duty ratio of a plurality of duty ratios. In one embodiment, the y-axis of the first mode graph (900) may be a driving current of the display (110). In one embodiment, the first mode graph (900) may represent a driving current for maintaining the brightness of the display (110) constant as the second reference duty ratio of the display (110) changes.

[0183] In one embodiment, the first mode graph (900) may include a first saturation current (910) and a second saturation current (920). In one embodiment, the first saturation current (910) may refer to a minimum driving current required to drive the display (110). In one embodiment, if a current smaller than the first saturation current (910) is provided to the display (110), the current may not cause the display (110) to operate normally.

[0184] In one embodiment, the second saturation current (920) may refer to the maximum driving current that can drive the display (110). In one embodiment, if a current greater than the second saturation current (920) is provided to the display (110), the current may cause the display (110) to not operate normally due to overload or the like.

[0185] In one embodiment, the duty ratio corresponding to the first saturation current (910) may be the first saturation duty ratio (940). The duty ratio corresponding to the second saturation current (920) may be the second saturation duty ratio (950). In this case, the luminance of the display (110) driven by the first saturation current (910) and the first saturation duty ratio (940) may be the same as the luminance of the display (110) driven by the second saturation current (920) and the second saturation duty ratio (950).

[0186] In one embodiment, when the luminance of the display (110) is the same, the higher the duty ratio and the lower the magnitude of the driving current, the lower the power consumption may be. Accordingly, the power consumption of the display (110) driven by the first saturation current (910) and the first saturation duty ratio (940) may be lower than the power consumption of the display (110) driven by the second saturation current (920) and the second saturation duty ratio (950).

[0187] In one embodiment, a driving current (930) corresponding to a second reference duty ratio (960) may be determined by the first mode graph (900). In one embodiment, the luminance of the display (110) driven by the second reference duty ratio (960) and the driving current (930) may be the same as the luminance of the display (110) driven by the second saturation current (920) and the second saturation duty ratio (950).

[0188] In one embodiment, the power consumption of a display (110) driven with a second reference duty ratio (960) and a driving current (930) corresponding to the second reference duty ratio (960) may be lower than the power consumption of a display (110) driven with a second saturation current (920) and a second saturation duty ratio (950).

[0189] In one embodiment, at least one processor (310) may determine the first saturated duty ratio (940) as the second target duty ratio (940). At least one processor (310) may determine the difference between the second target duty ratio (940) and the second reference duty ratio (960) as the second duty margin (970).

[0190] In one embodiment, the second duty margin (970) may be the difference between the duty ratio when the display (110) is operated at the minimum driving current (910) and a second reference duty ratio (960) determined based on the input image.

[0191] FIG. 9b is a flowchart for explaining the operation of a display device that calculates a second duty margin using a second relational expression used in a second mode according to one embodiment of the present disclosure and a second target duty ratio determined by the second relational expression.

[0192] Referring to FIGS. 2, 3, 9A, and 9B, in one embodiment, FIG. 9B illustrates a graph (901) representing a second relationship used in a second mode in which the power consumption of the display (110) is maintained constant. Hereinafter, the graph (901) representing the second relationship will be referred to as a second mode graph (901), and the second relationship will be described using the second mode graph (901).

[0193] In one embodiment, the x-axis of the second mode graph (901) may be a second reference duty ratio. In one embodiment, the x-axis of the second mode graph (901) may be an average duty ratio of a plurality of duty ratios. In one embodiment, the y-axis of the second mode graph (901) may be a driving current of the display (110). In one embodiment, the second mode graph (901) may represent a driving current for maintaining a constant power consumption of the display (110) as the second reference duty ratio of the display (110) changes.

[0194] In one embodiment, the second mode graph (901) may include a first saturation current (910) and a second saturation current (920). In one embodiment, the first saturation current (910) may refer to a minimum driving current required to drive the display (110). In one embodiment, the second saturation current (920) may refer to a maximum driving current capable of driving the display (110).

[0195] In one embodiment, the duty ratio corresponding to the first saturation current (910) may be the third saturation duty ratio (941). The duty ratio corresponding to the second saturation current (920) may be the fourth saturation duty ratio (951). In this case, the power consumption of the display (110) driven by the first saturation current (910) and the third saturation duty ratio (941) may be the same as the power consumption of the display (110) driven by the second saturation current (920) and the fourth saturation duty ratio (951).

[0196] In one embodiment, when the power consumption of the display (110) is the same, the higher the duty ratio and the lower the magnitude of the driving current, the higher the brightness of the display (110). Accordingly, the brightness of the display (110) driven by the first saturation current (910) and the third saturation duty ratio (941) may be higher than the brightness of the display (110) driven by the second saturation current (920) and the fourth saturation duty ratio (951).

[0197] In one embodiment, a driving current (931) corresponding to a second reference duty ratio (960) may be determined by the second mode graph (901). In one embodiment, the power consumption of the display (110) driven by the second reference duty ratio (960) and the driving current (931) may be equal to the power consumption of the display (110) driven by the second saturation current (920) and the fourth saturation duty ratio (951).

[0198] In one embodiment, the luminance of the display (110) driven with the second reference duty ratio (960) and the driving current (931) corresponding to the second reference duty ratio (960) may be higher than the luminance of the display (110) driven with the second saturation current (920) and the fourth saturation duty ratio (951).

[0199] In one embodiment, at least one processor (310) may determine the third saturated duty ratio (941) as the second target duty ratio (941). At least one processor (310) may determine the difference between the second target duty ratio (941) and the second reference duty ratio (960) as the second duty margin (971).

[0200] In one embodiment, the first saturation current (910) and the second saturation current (920) included in the first mode graph (900) and the first saturation current (910) and the second saturation current (920) included in the second mode graph (901) may be the same. The first saturation current (910) and the second saturation current (920) may be determined by the specifications of the display (110), and thus may be the same regardless of the operating mode of the display device (100).

[0201] In one embodiment, when the second saturation duty ratio (950) of the first mode graph (900) and the fourth saturation duty ratio (951) of the second mode graph (901) are set to be the same, the third saturation duty ratio (941) of the second mode graph (901) may be higher than the first saturation duty ratio (940) of the first mode graph (900). Accordingly, the second duty margin (971) in the second mode graph (901) may be higher than the second duty margin (970) in the first mode graph (900). Depending on the operation mode of the display device (100), the size of the calculated second duty margin may vary.

[0202] FIG. 10 is a flowchart illustrating the operation of a display device for determining a compensation duty margin according to one embodiment of the present disclosure. Hereinafter, steps identical to those described in FIGS. 4 and 5 are assigned the same reference numerals, and redundant descriptions are omitted.

[0203] Referring to FIGS. 3, 4, 5 and 10, in one embodiment, the step (S500) of determining the correction duty margin may include a step (S510) of comparing the first duty margin (730, see FIG. 7a) with the second duty margin (970, 971, see FIGS. 9a, 9b) to determine whether the second duty margin (970, 971) is smaller than the first duty margin (730).

[0204] In one embodiment, in the step (S510) of determining whether the second duty margin (970, 971) is smaller than the first duty margin (730), if the second duty margin (970, 971) is determined to be smaller than the first duty margin (730), in the step (S500) of determining the correction duty margin, the second duty margin (970, 971) may be determined as the correction duty margin (S520).

[0205] In one embodiment, in the step (S510) of determining whether the second duty margin (970, 971) is smaller than the first duty margin (730), if the first duty margin (730) is determined to be equal to or smaller than the second duty margin (970, 971), in the step (S500) of determining the correction duty margin, the first duty margin (730) may be determined as the correction duty margin (S530).

[0206] At this time, the second duty margin (970, 971) may be a duty margin determined using the first relational expression (900) or determined using the second relational expression (901) as the display device (100) operates in either the first mode or the second mode.

[0207] In one embodiment, in the step (S600) of driving the display with a plurality of final duty ratios determined using the correction duty margin and a final driving current determined to correspond to the plurality of final duty ratios, the first duty margin (730) or the second duty margin (970) may be used as the correction duty margin depending on the comparison result between the first duty margin (730) and the second duty margin (970).

[0208] FIG. 11 is a diagram for explaining a plurality of final duty ratios determined using a correction duty margin according to one embodiment of the present disclosure.

[0209] Referring to FIGS. 1, 3, 5, 7a and 11, in one embodiment, FIG. 11 illustrates a correction duty margin (1100) and a plurality of final duty ratios (1110) determined using the correction duty margin (1100).

[0210] In one embodiment, compared to FIG. 7A, each of the plurality of final duty ratios (1110) illustrated in FIG. 11 may be a duty ratio obtained by adding a correction duty margin (1100) to each of the plurality of duty ratios (710). In one embodiment, the plurality of final duty ratios (1110) may be duty ratios calculated using a PWM (Pulse Width Modulation) technique using the plurality of duty ratios (710) and the correction duty margin (1100).

[0211] In one embodiment, FIG. 11 illustrates a first final duty ratio (1120) obtained by adding a correction duty margin (1100) to the first duty ratio (711) of FIG. 7a, and a second final duty ratio (1130) obtained by adding a correction duty margin (1100) to the second duty ratio (712).

[0212] In one embodiment, when the first duty margin (730) is determined to be equal to or less than the second duty margin (970, 971) and thus the first duty margin (730) is determined to be the correction duty margin (1100), the second final duty ratio (1130) may be equal to the first target duty ratio (720). However, the present disclosure is not limited thereto, and when the second duty margin (970, 971) is determined to be less than the first duty margin (730) and thus the second duty margin (970, 971) is determined to be the correction duty margin (1100), the second final duty ratio (1130) may be lower than the first target duty ratio (720).

[0213] In one embodiment, since the correction duty margin (1100) is not greater than the first duty margin (730), each of the plurality of final duty ratios (1110) may be equal to or less than the first target duty ratio (720). Accordingly, even if the plurality of blocks (700) included in the display (110) are driven with the plurality of final duty ratios (1110) to display the image (120), the image quality of the image (120) can be prevented from being deteriorated. In addition, the image quality of the image (120) can be improved by displaying the image (120) on the display (110) using a technology such as local dimming.

[0214] FIG. 12 is a diagram illustrating a final driving current determined using a compensation duty margin according to one embodiment of the present disclosure. Hereinafter, the same configuration as that described in FIG. 9a is assigned the same reference numerals, and redundant descriptions are omitted.

[0215] Referring to FIGS. 1, 3, 5, 9a, 11 and 12, in one embodiment, FIG. 12 illustrates a first mode graph (900), a second reference duty ratio (960), a driving current (930) corresponding to the second reference duty ratio (960), a correction duty margin (1100), a final reference duty ratio (1200) determined by a plurality of final duty ratios (1110), and a final driving current (1210) corresponding to the final reference duty ratio (1200).

[0216] In one embodiment, the final reference duty ratio (1200) may be an average duty ratio of a plurality of final duty ratios (1110). At least one processor (310) may calculate the average duty ratio of the plurality of final duty ratios (1110) and determine it as the final reference duty ratio (1200). The final reference duty ratio (1200) may be higher than the second reference duty ratio (960).

[0217] In one embodiment, the final drive current (1210) may be a current calculated using a compensation duty margin (1100) compared to the drive current (930). The final drive current (1210) may be a current calculated using a Pulse Amplitude Modulation (PAM) technique using the drive current (930) and the compensation duty margin (1100). The final drive current (1210) may be less than the drive current (930).

[0218] In one embodiment, when the first duty margin (730) is determined to be equal to or less than the second duty margin (970, 971) and thus the first duty margin (730) is determined to be the correction duty margin (1100), the final reference duty ratio (1200) may be equal to or less than the second target duty ratio (940). However, the present disclosure is not limited thereto, and when the second duty margin (970, 971) is determined to be less than the first duty margin (730) and thus the second duty margin (970, 971) is determined to be the correction duty margin (1100), the final reference duty ratio (1200) may be equal to the second target duty ratio (940).

[0219] In one embodiment, since the correction duty margin (1100) is not greater than the second duty margin (970), the final reference duty ratio (1200) may be equal to or less than the second target duty ratio (940). Accordingly, the final drive current (1210) corresponding to the final reference duty ratio (1200) may be equal to or greater than the first saturation current (910).

[0220] Accordingly, the display device (100) can display an image (120) of the same brightness on the display (110) with lower power consumption than when the display (110) is driven with a driving current corresponding to a plurality of duty ratios and a second reference duty ratio (960) by driving the display (110) with a plurality of final duty ratios and a final driving current. In addition, the display (110) can be prevented from being properly driven by providing a driving current that is lower than the minimum driving current for driving the display (110) to the display (110).

[0221] In one embodiment, FIG. 12 illustrates a final reference duty ratio (1200) and a final drive current (1210) calculated using a first mode graph (900) when the display device (100) operates in a first mode. However, the present disclosure is not limited thereto, and when the display device (100) operates in a second mode, the final reference duty ratio and the final drive current may be calculated using a second mode graph (901).

[0222] At this time, the final reference duty ratio calculated using the second mode graph (901) may be the same as the final reference duty ratio calculated using the first mode graph (900). The final driving current calculated using the second mode graph (901) may be higher than the final driving current calculated using the first mode graph (900).

[0223] In this case, the display device (100) can display an image (120) of higher brightness on the display (110) with the same power consumption as when the display (110) is driven with a plurality of final duty ratios and a driving current corresponding to a second reference duty ratio (960) by driving the display (110) with a plurality of final duty ratios and a final driving current. In addition, the display (110) can be prevented from being driven properly by providing a driving current that is smaller than the minimum driving current for driving the display (110) to the display (110).

[0224] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the present disclosure.

[0225] In order to solve the above-described technical problem, in one embodiment of the present disclosure, a display device is provided. The display device may include a display that is divided into a plurality of blocks and driven. The display device may include a memory that stores at least one instruction. The display device may include at least one processor that executes at least one instruction stored in the memory. When the at least one processor executes the at least one instruction, the display device can obtain an input image. When the at least one processor executes the at least one instruction, the display device can calculate a plurality of duty ratios at which each of the plurality of blocks is driven within one frame based on the obtained input image. When the at least one processor executes the at least one instruction, the display device can calculate a first duty margin using a first target duty ratio that is preset and a first reference duty ratio selected from among the calculated duty ratios. By having at least one processor execute at least one command, the display device can calculate a second duty margin using a second target duty ratio determined by a relationship between a driving duty ratio and a driving current of a preset display and a second reference duty ratio determined based on the calculated plurality of duty ratios. By having at least one processor execute at least one command, the display device can determine a correction duty margin by comparing the first duty margin and the second duty margin. By having at least one processor execute at least one command, the display device can drive the display using a plurality of final duty ratios determined using the plurality of duty ratios and the correction duty margin, and a final driving current determined to correspond to the plurality of final duty ratios using the relationship.

[0226] In one embodiment of the present disclosure, at least one processor executes at least one command, so that the display device can select a highest duty ratio among the calculated plurality of duty ratios as a first reference duty ratio.

[0227] In one embodiment of the present disclosure, the first target duty ratio may be a ratio set to the highest duty ratio at which the display can be driven within one frame.

[0228] In one embodiment of the present disclosure, at least one processor executes at least one command, whereby the display device can calculate a difference between a first target duty ratio and a first reference duty ratio as a first duty margin.

[0229] In one embodiment of the present disclosure, at least one processor executes at least one command, whereby the display device can determine an average duty ratio of the calculated plurality of duty ratios as a second reference duty ratio.

[0230] In one embodiment of the present disclosure, the relationship may include a minimum driving current for driving the display and a minimum driving duty ratio corresponding to the minimum driving current. By having at least one processor execute at least one command, the display device may determine the minimum driving duty ratio as a second target duty ratio.

[0231] In one embodiment of the present disclosure, at least one processor executes at least one instruction, whereby the display device can calculate a difference between a second target duty ratio and a second reference duty ratio as a second duty margin.

[0232] In one embodiment of the present disclosure, by having at least one processor execute at least one command, the display device can compare a first duty margin and a second duty margin, and determine the first duty margin as a correction duty margin based on whether the first duty margin is equal to or less than the second duty margin. By having at least one processor execute at least one command, the display device can determine the second duty margin as a correction duty margin based on whether the second duty margin is less than the first duty margin.

[0233] In one embodiment of the present disclosure, the relational expression may include a first relational expression representing a relation between a driving duty ratio and a driving current such that the luminance of the display is maintained constant, and a second relational expression representing a relation between the driving duty ratio and the driving current such that the power consumption of the display is maintained constant. By having at least one processor execute at least one command, the display device can obtain a mode selection input for selecting a first mode in which the luminance of the display is maintained constant or a second mode in which the power consumption of the display is maintained constant. By having at least one processor execute at least one command, the display device can calculate a second duty margin using a second target duty ratio and a second reference duty ratio determined by the first relational expression when the first mode is selected based on the obtained mode selection input. By having at least one processor execute at least one command, the display device can calculate a second duty margin using the second target duty ratio and the second reference duty ratio determined by the second relational expression when the second mode is selected based on the obtained mode selection input.

[0234] In one embodiment of the present disclosure, by at least one processor executing at least one command, the display device can drive each of a plurality of blocks of the display with a plurality of corresponding final duty ratios. By at least one processor executing at least one command, the display device can drive the display with the final driving current.

[0235] In order to solve the above-described technical problem, one embodiment of the present disclosure provides a method of operating a display device. The method of operating the display device may include a step of acquiring an input image. The method of operating the display device may include a step of calculating a plurality of duty ratios at which each of a plurality of blocks of a display, which is divided into a plurality of blocks and driven within one frame, is driven based on the acquired input image. The method of operating the display device may include a step of calculating a first duty margin using a first reference duty ratio selected from among a first target duty ratio set in advance and a plurality of calculated duty ratios. The method of operating the display device may include a step of calculating a second duty margin using a second target duty ratio determined by a relationship between a driving duty ratio and a driving current of a preset display and a second reference duty ratio determined based on the plurality of calculated duty ratios. The method of operating the display device may include a step of determining a correction duty margin by comparing the first duty margin and the second duty margin. A method of operating a display device may include driving the display with a plurality of final duty ratios determined using a plurality of duty ratios and a compensation duty margin, and a final driving current determined to correspond to the plurality of final duty ratios using a relational expression.

[0236] In one embodiment of the present disclosure, the step of calculating the first duty margin may include the step of selecting the highest duty ratio among the calculated plurality of duty ratios as the first reference duty ratio.

[0237] In one embodiment of the present disclosure, the step of calculating the first duty margin may include the step of calculating the difference between the first target duty ratio and the first reference duty ratio as the first duty margin.

[0238] In one embodiment of the present disclosure, the step of calculating the second duty margin may include the step of determining an average duty ratio of the calculated plurality of duty ratios as the second reference duty ratio.

[0239] In one embodiment of the present disclosure, the relationship may include a minimum driving current for driving the display and a minimum driving duty ratio corresponding to the minimum driving current. The second target duty ratio may be a duty ratio determined as the minimum driving duty ratio.

[0240] In one embodiment of the present disclosure, the step of calculating the second duty margin may include the step of calculating the difference between the second target duty ratio and the second reference duty ratio as the second duty margin.

[0241] In one embodiment of the present disclosure, in the step of determining the correction duty margin, a first duty margin and a second duty margin may be compared, and the first duty margin may be determined as the correction duty margin depending on whether the first duty margin is equal to or less than the second duty margin. In the step of determining the correction duty margin, the second duty margin may be determined as the correction duty margin depending on whether the second duty margin is less than the first duty margin.

[0242] In one embodiment of the present disclosure, the relational expression may include a first relational expression representing a relation between a driving duty ratio and a driving current such that the luminance of the display is maintained constant, and a second relational expression representing a relation between the driving duty ratio and the driving current such that the power consumption of the display is maintained constant. A method of operating a display device may include a step of acquiring a mode selection input that selects a first mode in which the luminance of the display is maintained constant or a second mode in which the power consumption of the display is maintained constant. When the first mode is selected in the step of acquiring the mode selection input, the step of calculating the second duty margin may calculate the second duty margin using the second target duty ratio and the second reference duty ratio determined by the first relational expression. When the second mode is selected in the step of acquiring the mode selection input, the step of calculating the second duty margin may calculate the second duty margin using the second target duty ratio and the second reference duty ratio determined by the second relational expression.

[0243] In order to solve the above-described technical problem, a computer-readable recording medium having recorded thereon a program for performing at least one method of the operating method of a display device disclosed in one embodiment can be provided.

[0244] The program executed by the electronic device described in this disclosure may be implemented as hardware components, software components, and / or a combination of hardware components and software components. The program may be executed by any system capable of executing computer-readable instructions.

[0245] Software may include a computer program, code, instructions, or a combination of one or more of these, which may configure a processing device to do a desired thing or may independently or collectively command a processing device to do a desired thing.

[0246] Software may be implemented as a computer program containing instructions stored on a computer-readable storage medium. Examples of computer-readable storage media include magnetic storage media (e.g., read-only memory (ROM), random-access memory (RAM), floppy disks, hard disks, etc.) and optical readable media (e.g., CD-ROMs, DVDs (Digital Versatile Discs)). The computer-readable storage media may be distributed across network-connected computer systems, so that computer-readable code may be stored and executed in a distributed manner. The storage media may be readable by a computer, stored in a memory, and executed by a processor.

[0247] Computer-readable storage media may be provided in the form of non-transitory storage media. Here, the term "non-transitory storage media" simply means a tangible device that does not contain signals (e.g., electromagnetic waves). This term does not distinguish between cases where data is permanently stored in the storage media and cases where data is temporarily stored. For example, a "non-transitory storage medium" may include a buffer in which data is temporarily stored.

[0248] Additionally, programs according to the embodiments disclosed herein may be provided as part of a computer program product. The computer program product may be traded as a commodity between sellers and buyers.

[0249] A computer program product may include a software program and a computer-readable storage medium storing the software program. For example, a computer program product may include a product in the form of a software program (e.g., a downloadable application) distributed electronically by an electronic device manufacturer or through an electronic marketplace (e.g., the Samsung Galaxy Store). For electronic distribution, at least a portion of the software program may be stored on a storage medium or temporarily created. In this case, the storage medium may be a server of the electronic device manufacturer, a server of the electronic marketplace, or a storage medium of an intermediary server that temporarily stores the software program.

[0250] Although the embodiments described above have been described with limited examples and drawings, those skilled in the art will appreciate that various modifications and variations can be made based on the above description. For example, appropriate results can still be achieved even if the described techniques are performed in a different order than described, and / or components such as the described computer system or modules are combined or combined in a different manner than described, or are replaced or substituted with other components or equivalents.

Claims

1. In the display device (100), A display (110) driven by being divided into multiple blocks; A memory (300) storing at least one instruction; and At least one processor (310) for executing at least one command stored in the memory (300), By executing the at least one command by the at least one processor (310), the display device (100) Obtain the input image, Based on the input image acquired above, multiple duty ratios at which each of the multiple blocks is driven within one frame are calculated, A first duty margin is calculated using a first target duty ratio set in advance and a first reference duty ratio selected from among the plurality of calculated duty ratios, A second duty margin is calculated by using a second target duty ratio determined by a relationship between the driving duty ratio and the driving current of the preset display and a second reference duty ratio determined based on the calculated plurality of duty ratios, Comparing the first duty margin and the second duty margin to determine a compensation duty margin, A display device (100) that drives the display with a plurality of final duty ratios determined using the plurality of duty ratios and the compensation duty margin, and a final driving current determined to correspond to the plurality of final duty ratios using the relational expression.

2. In paragraph 1, By executing the at least one command by the at least one processor (310), the display device (100) A display device (100) that selects the highest duty ratio among the calculated multiple duty ratios as the first reference duty ratio.

3. In either of the first or second paragraphs, The above first target duty ratio is a display device (100) set as the highest duty ratio at which the display (110) can be driven within one frame.

4. In any one of clauses 1 to 3, By executing the at least one command by the at least one processor (310), the display device (100) A display device (100) that calculates the difference between the first target duty ratio and the first reference duty ratio as the first duty margin.

5. In any one of clauses 1 to 4, By executing the at least one command by the at least one processor (310), the display device (100) A display device (100) that determines the average duty ratio of the calculated plurality of duty ratios as the second reference duty ratio.

6. In any one of clauses 1 to 5, The above relationship includes the minimum driving current for driving the display (110) and the minimum driving duty ratio corresponding to the minimum driving current. By executing the at least one command by the at least one processor (310), the display device (100) A display device (100) that determines the minimum driving duty ratio as the second target duty ratio.

7. In any one of clauses 1 to 6, By executing the at least one command by the at least one processor (310), the display device (100) A display device (100) that calculates the difference between the second target duty ratio and the second reference duty ratio as the second duty margin.

8. In any one of clauses 1 to 7, By executing the at least one command by the at least one processor (310), the display device (100) A display device (100) that compares the first duty margin and the second duty margin, determines the first duty margin as the correction duty margin when the first duty margin is equal to or smaller than the second duty margin, and determines the second duty margin as the correction duty margin when the second duty margin is smaller than the first duty margin.

9. In any one of clauses 1 to 8, The above relationship includes a first relationship expressing a relationship between the driving duty ratio and the driving current so that the brightness of the display (110) is maintained constant, and a second relationship expressing a relationship between the driving duty ratio and the driving current so that the power consumption of the display (110) is maintained constant. By executing the at least one command by the at least one processor (310), the display device (100) Obtain a mode selection input for selecting a first mode in which the brightness of the display (110) is kept constant or a second mode in which the power consumption of the display (110) is kept constant, Based on the acquired mode selection input, the second duty margin is calculated using the second target duty ratio and the second reference duty ratio determined by the first relational expression as the first mode is selected, A display device (100) that calculates the second duty margin by using the second target duty ratio and the second reference duty ratio determined by the second relational expression based on the acquired mode selection input and the second mode being selected.

10. In any one of clauses 1 to 9, By executing the at least one command by the at least one processor (310), the display device (100) A display device (100) that drives each of the plurality of blocks of the display (110) with the corresponding plurality of final duty ratios and drives the display (110) with the final driving current.

11. In the operating method of the display device (100), Step of acquiring an input image (S100); A step (S200) of calculating multiple duty ratios by which each of the multiple blocks of a display, which is divided into multiple blocks and driven within one frame, is driven based on the acquired input image; A step (S300) of calculating a first duty margin using a first target duty ratio set in advance and a first reference duty ratio selected from among the plurality of calculated duty ratios; A step (S400) of calculating a second duty margin using a second target duty ratio determined by a relationship between the driving duty ratio and the driving current of the preset display and a second reference duty ratio determined based on the calculated plurality of duty ratios; Step (S500) of determining a compensation duty margin by comparing the first duty margin and the second duty margin; and A method of operating a display device (100), comprising a step (S600) of driving the display with a plurality of final duty ratios determined using the plurality of duty ratios and the compensation duty margin, and a final driving current determined to correspond to the plurality of final duty ratios using the relational expression.

12. In paragraph 11, The step (S300) of calculating the first duty margin is as follows: A method of operating a display device (100) including a step of selecting the highest duty ratio among the calculated plurality of duty ratios as the first reference duty ratio.

13. In either of paragraphs 11 or 12, The above first target duty ratio is a method of operating a display device (100) set as the highest duty ratio at which the display can be driven within one frame.

14. In clauses 11 to 13, The step (S300) of calculating the first duty margin is as follows: A method of operating a display device (100), comprising a step of calculating a difference between the first target duty ratio and the first reference duty ratio as the first duty margin.

15. A computer-readable recording medium having recorded thereon a program for performing the method described in any one of claims 11 to 14 on a computer.

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