Display device performing time division operation and control method thereof

Abstract

This display device comprises: a power supply; a first display module including a first switch connected to the power supply and a second switch connected to a preset voltage; a second display module including a third switch connected to the power supply and a fourth switch connected to the preset voltage; one or more processors for selectively turning on the first switch, the second switch, the third switch, and the fourth switch included in the first display module and the second display module; and a memory storing instructions, wherein the instructions, when executed by the one or more processors, cause an electronic device to turn on the first switch and the fourth switch during a first time interval within a preset time and turn on the second switch and the third switch during a second time interval within the preset time.

Description

Time-division display device and control method thereof

[0001] The present invention relates to a display device and a control method thereof, and more particularly, to a display device that controls voltage during time-division operation and a control method thereof.

[0002] As display devices become larger and have higher resolutions, they are being composed of a greater number of display modules.

[0003] To improve brightness and reduce costs, display devices using a passive matrix method and display devices that sequentially operate multiple display modules through time division are being developed.

[0004] Conventionally, in order to sequentially drive each of a plurality of display modules, a discharge circuit that controls the residual potential of an inoperative display module can be used.

[0005] However, in the process of removing residual potential, rapid changes in voltage may cause the printed circuit board (PCB) to shake, which may cause problems such as vibration or noise.

[0006] There has been a persistent demand for methods to minimize vibration and noise while maintaining driving efficiency during the sequential driving of multiple display modules.

[0007] According to various embodiments of the present disclosure, a display device includes a power supply, a first display module including a first switch connected to the power supply and a second switch connected to a preset voltage, a second display module including a third switch connected to the power supply and a fourth switch connected to the preset voltage, and one or more processors for selectively turning on the first switch, the second switch, the third switch and the fourth switch included in each of the first display module and the second display module, and a memory for storing instructions, wherein when the instructions are executed by the one or more processors, the electronic device can turn on the first switch and the fourth switch during a first time interval within a preset time period, and turn on the second switch and the third switch during a second time interval within the preset time period.

[0008] In a method for controlling a display device that sequentially supplies power to a first display module and a second display module through a power supply unit according to various embodiments of the present disclosure, the method may include a step of supplying power to the first display module by turning on a first switch connected to the power supply unit within the first display module and turning on a fourth switch connected to a preset voltage within the second display module during a first time period within a preset time period, and a step of supplying power to the second display module by turning on a third switch connected to the power supply unit within the second display module and turning on a second switch connected to the preset voltage within the first display module during a second time period within the preset time period.

[0009] The above and other aspects, features, and advantages of specific embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings.

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

[0011] FIG. 2 is a block diagram illustrating a display device according to one or more embodiments of the present disclosure.

[0012] FIG. 3 is a drawing for explaining the operation of a first switch and a second switch included in each of a plurality of display modules according to one or more embodiments of the present disclosure.

[0013] FIG. 4 is a drawing for explaining a first switch and a second switch included in a display module according to one or more embodiments of the present disclosure.

[0014] FIG. 5a is a drawing for explaining the voltage change of each of a plurality of display modules according to the prior art.

[0015] FIG. 5b is a diagram illustrating voltage changes of each of a plurality of display modules according to one or more embodiments of the present disclosure.

[0016] FIG. 6 is a diagram illustrating the relationship between output current and forward voltage according to one or more embodiments of the present disclosure.

[0017] FIG. 7 is a diagram illustrating the relationship between temperature and forward voltage according to one or more embodiments of the present disclosure.

[0018] FIG. 8 is a flowchart illustrating a method for controlling a display device according to one or more embodiments of the present disclosure.

[0019] The terms used in this specification will be briefly explained, and the present disclosure will be described in detail.

[0020] The terms used in the embodiments of this disclosure have been selected from widely used, current terms, taking into account the functions of this disclosure. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the description of the relevant disclosure. Therefore, the terms used in this disclosure should not be defined simply as names of terms, but rather based on the meanings of the terms and the overall content of this disclosure.

[0021] The embodiments of the present disclosure may be modified and have various embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the scope of the present disclosure to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the scope of the disclosed concepts and techniques. In describing the embodiments, detailed descriptions of related known technologies will be omitted if they are deemed to obscure the main point.

[0022] Terms such as "first" and "second" may be used to describe various components, but the components should not be limited by these terms. These terms are used solely to distinguish one component from another.

[0023] Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "comprise" or "consist of" are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood not to preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0024] Elements described as "modules" or "parts" may be physically implemented by analog and / or digital circuits including one or more logic gates, integrated circuits, microprocessors, microcontrollers, memory circuits, passive electronic components, active electronic components, etc.

[0025] 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, 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 for clarity of description of the present disclosure, and similar parts are designated with similar reference numerals throughout the specification.

[0026] FIG. 1 is a drawing for explaining a display device according to one or more embodiments of the present disclosure.

[0027] Referring to FIG. 1, a display device (100) may be composed of a power supply unit (110) and a plurality of display modules (120-1, ..., 120-n).

[0028] The display device (100) can display video data. The display device (100) can be implemented as a TV, but is not limited thereto, and can be applied to any device having a display function, such as a video wall, a large format display (LFD), a digital signage, a digital information display (DID), a projector display, etc. In addition, the display device (100) can be implemented as various types of displays, such as a liquid crystal display (LCD), an organic light-emitting diode (OLED), a liquid crystal on silicon (LCoS), a digital light processing (DLP), a quantum dot (QD) display panel, a quantum dot light-emitting diodes (QLED), etc.

[0029] According to one or more embodiments, the display device (100) may be implemented in the form of a modular display including a plurality of display modules (120-1, ..., 120-n) (e.g., a first display module and a second display module). According to one or more embodiments, each of the plurality of display modules (120-1, ..., 120-n) is an independent component, and the plurality of display modules (120-1, ..., 120-n) may be physically connected to form a modular display. Here, each of the plurality of display modules (120-1, ..., 120-n) may include at least one light-emitting element. The first display module may include a first light-emitting element, and the second display module may include a second light-emitting element. According to one or more embodiments, the display device (100) may sequentially operate each of the plurality of display modules (120-1, ..., 120-n).

[0030] However, the present invention is not limited thereto, and according to various embodiments of the present disclosure, the display device (100) includes a plurality of scan lines, and each of the plurality of scan lines may be referred to as a display module.

[0031] For example, the display device (100) may operate in a passive matrix manner. Here, the passive matrix manner may allow one or more driver ICs to sequentially operate a plurality of scan lines. For example, one or more driver ICs provided in the display device (100) may sequentially provide scan signals to a plurality of scan lines, and one or more driver ICs may apply data to pixels corresponding to scan lines among the plurality of scan lines to which scan signals are provided using a plurality of data lines.

[0032] In addition, each of the plurality of display modules (120-1, ..., 120-n) may operate in a passive matrix manner. For example, each of the plurality of display modules (120-1, ..., 120-n) includes a plurality of scan lines, and one or more driver ICs included in each of the plurality of display modules (120-1, ..., 120-n) sequentially provide scan signals to the plurality of scan lines, and one or more driver ICs may apply data to pixels corresponding to scan lines to which scan signals are provided among the plurality of scan lines by using a plurality of data lines.

[0033] According to one or more embodiments, each of the plurality of display modules (120-1, ..., 120-n) may include a first switch and a second switch.

[0034] According to one or more embodiments, the display device (100) can sequentially operate each of a plurality of display modules (120-1, ..., 120-n) by dividing a preset time.

[0035] For example, the display device (100) can drive (or provide a scan signal) the first display module (120-1) by selectively turning on the first switch and the second switch included in the first display module (120-1) in a first time interval corresponding to the first display module (120-1) within a preset time.

[0036] Next, the display device (100) can drive (or provide a scan signal) the second display module (120-2) by selectively turning on the third switch (corresponding to the first switch) and the fourth switch (corresponding to the second switch) included in the second display module (120-2) during a second time interval corresponding to the second display module (120-2) within a preset time period. A detailed description thereof will be given with reference to the drawings below.

[0037] FIG. 2 is a block diagram illustrating a display device according to one or more embodiments of the present disclosure.

[0038] Referring to FIG. 2, the display device (100) includes a power supply (110), a display panel (120), and one or more processors (130).

[0039] According to one or more embodiments, the power supply unit (110) is implemented as a switched mode power supply (SMPS) and may include a power factor correction circuit, i.e., a PFC circuit, etc. to meet the increase in total power consumption and various regulations due to the enlargement of the display device (100). The power supply unit (110) may also include a diode bridge (or bridge rectifier), an electromagnetic interference (EMI) filter, etc. According to one or more embodiments, the diode bridge is a bridge circuit in which four diodes are connected and may be a component that rectifies an AC input and changes it into a DC output. The EMI filter unit can remove electrical noise of commercial power.

[0040] According to one or more embodiments of the present disclosure, a power supply unit (110) can convert AC power into DC power to stably supply power to a load (e.g., a display panel (120)) of a display device (100). As described below, one or more processors (130) control the on-off of a first switch and a second switch included in each of a plurality of display modules (120-1, ..., 120-n) to provide stabilized power to the load, and can sequentially operate each of the plurality of display modules (120-1, ..., 120-n).

[0041] According to one or more embodiments, the display panel (120) includes a plurality of display modules (120-1, ..., 120-n), and as described above, each of the plurality of display modules (120-1, ..., 120-n) is an independent component, and each of the plurality of display modules (120-1, ..., 120-n) can be combined to form the display panel (120).

[0042] According to another example, each of the plurality of display modules (120-1, ..., 120-n) constitutes a scan line, and the display panel (120) may include a plurality of scan lines. For example, a first scan line may correspond to a first display module, and a second scan line may correspond to a second display module.

[0043] Each of the plurality of display modules (120-1, ..., 120-n) according to one or more embodiments of the present disclosure may include a plurality of self-luminous elements. Here, the self-luminous elements may be at least one of a light emitting diode (LED) or a micro LED.

[0044] In addition, each of the plurality of display modules (120-1, ..., 120-n) may be implemented as an LED cabinet including a plurality of LED (Light Emitting Diode) elements. Here, the LED elements may be implemented as RGB LEDs, and the RGB LEDs may include RED LEDs, GREEN LEDs, and BLUE LEDs. In addition, the LED elements may additionally include a White LED in addition to the RGB LEDs.

[0045] According to one or more embodiments, the LED element may be implemented as a micro LED. Here, a micro LED is an LED with a size of about 5 to 100 micrometers, which is an ultra-small light-emitting element that emits light on its own without a color filter.

[0046] However, it is not limited thereto, and a plurality of display modules (120-1, ..., 120-n) form a backlight and can irradiate light to the display panel (120) from the back surface of the display panel (120), that is, the surface opposite to the surface on which the image is displayed.

[0047] One or more processors (130) according to one or more embodiments of the present disclosure control the overall operation of the display device (100).

[0048] According to one or more embodiments of the present disclosure, the one or more processors may be implemented as a digital signal processor (DSP), a microprocessor, a timing controller (TCON), etc. for processing a digital signal. However, the present disclosure is not limited thereto, and may include or be defined by one or more of a central processing unit (CPU), a micro controller unit (MCU), a micro processing unit (MPU), a controller, an application processor (AP), a communication processor (CP), an ARM processor, or an artificial intelligence (AI) processor. In addition, the one or more processors may be implemented as a system on chip (SoC), a large scale integration (LSI), etc. having a processing algorithm built in, or may be implemented in the form of a field programmable gate array (FPGA). The one or more processors may perform various functions by executing computer executable instructions stored in a memory.

[0049] The one or more processors may include one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), an Accelerated Processing Unit (APU), a Many Integrated Core (MIC), a Digital Signal Processor (DSP), a Neural Processing Unit (NPU), a hardware accelerator, or a machine learning accelerator. The one or more processors may control one or any combination of other components of the electronic device, and may perform operations related to communication or data processing. The one or more processors may execute one or more programs or instructions stored in a memory. For example, the one or more processors may perform a method according to an embodiment of the present disclosure by executing one or more instructions stored in a memory.

[0050] When a method according to an embodiment of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one processor or by a plurality of processors. For example, when a first operation, a second operation, and a third operation are performed by a method according to an embodiment of the present disclosure, the first operation, the second operation, and the third operation may all be performed by the first processor, or the first operation and the second operation may be performed by the first processor (e.g., a general-purpose processor) and the third operation may be performed by the second processor (e.g., an artificial intelligence-dedicated processor).

[0051] One or more processors may be implemented as a single core processor including one core, or may be implemented as one or more multicore processors including multiple cores (e.g., homogeneous multicore or heterogeneous multicore). When one or more processors are implemented as a multicore processor, each of the multiple cores included in the multicore processor may include internal processor memory, such as cache memory or on-chip memory, and a common cache shared by the multiple cores may be included in the multicore processor. In addition, each of the multiple cores (or some of the multiple cores) included in the multicore processor may independently read and execute a program instruction for implementing a method according to an embodiment of the present disclosure, or all (or some) of the multiple cores may be linked to read and execute a program instruction for implementing a method according to an embodiment of the present disclosure.

[0052] When a method according to an embodiment of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one core among a plurality of cores included in a multi-core processor, or may be performed by a plurality of cores. For example, when a first operation, a second operation, and a third operation are performed by a method according to an embodiment, the first operation, the second operation, and the third operation may all be performed by a first core included in the multi-core processor, or the first operation and the second operation may be performed by a first core included in the multi-core processor, and the third operation may be performed by a second core included in the multi-core processor.

[0053] In embodiments of the present disclosure, a processor may mean a system on a chip (SoC) in which one or more processors and other electronic components are integrated, a single-core processor, a multi-core processor, or a core included in a single-core processor or a multi-core processor, wherein the core may be implemented as a CPU, a GPU, an APU, a MIC, a DSP, an NPU, a hardware accelerator, or a machine learning accelerator, but embodiments of the present disclosure are not limited thereto.

[0054] According to an embodiment, one or more processors (130) are implemented as one or more driver ICs, and one or more driver ICs can control on and off of the first switch and the second switch included in each of the plurality of display modules (120-1, ..., 120-n).

[0055] For example, one or more processors (130) may include one or more main processors for processing images and one or more driver ICs (Integrated Circuits) for controlling on and off of the first switch and the second switch included in each of the plurality of display modules (120-1, ..., 120-n).

[0056] FIG. 3 is a drawing for explaining the operation of a first switch and a second switch included in each of a plurality of display modules according to one or more embodiments of the present disclosure.

[0057] Referring to FIG. 3, one or more processors (130) can sequentially supply power to the plurality of display modules (120-1, ..., 120-n) by selectively turning on the first switch and the second switch included in each of the plurality of display modules (120-1, ..., 120-n).

[0058] For convenience of explanation, FIG. 3 illustrates a case where the display panel (120) includes a first display module (120-1) to a third display module (120-3), but the present invention is not limited thereto.

[0059] According to an embodiment, the preset time (t0 to t3) may be a time corresponding to one image frame among a plurality of image frames included in the video. For example, if the frame rate of the video is 60 FPS (Frames Per Second), the preset time may be 1 / 60 [sec].

[0060] According to an embodiment, one or more processors (130) may turn on a first switch included in a first display module (120-1) to operate a first display module (120-1) among a plurality of display modules (120-1, ..., 120-n) in a first time interval (t0 to t1) of preset times (t0 to t3).

[0061] Additionally, one or more processors (130) may turn on a second switch included in each of the second display module (120-2) and the third display module (120-3) to operate only the first display module (120-1) in the first time interval (t0 to t1).

[0062] According to an embodiment, the first switch and the second switch included in each of the plurality of display modules (120-1, ..., 120-n) may be selectively turned on. For example, when the first switch is turned on, the second switch may be turned off, and when the first switch is turned off, the second switch may be turned on.

[0063] Referring to FIG. 1 according to an embodiment, when the first switch included in each of the plurality of display modules (120-1, ..., 120-n) is turned on (and the second switch is turned off), the power supply unit (110) supplies power to the light-emitting element, so that the light-emitting element is turned on, and when the second switch is turned on (and the first switch is turned off), the power supply unit (110) does not supply power to the light-emitting element, so that the light-emitting element can be turned off.

[0064] According to an embodiment, one or more processors (130) may turn on a first switch included in a second display module (120-2) in a second time period (t1 to t2) after a first time period (t0 to t1) of preset times (t0 to t3) has elapsed to sequentially operate each of a plurality of display modules (120-1, ..., 120-n).

[0065] Additionally, one or more processors (130) may turn on a second switch included in each of the first display module (120-1) and the third display module (120-3) to operate only the second display module (120-2) in the second time interval (t1 to t2).

[0066] According to an embodiment, one or more processors (130) may turn on the first switch included in the third display module (120-3) in a third time period (t2 to t3) after a second time period (t1 to t2) of preset times (t0 to t3) has elapsed.

[0067] In FIG. 3, for convenience of explanation, the preset time intervals (t0 to t3) are divided into three intervals to illustrate the on and off operations of the first switch and the second switch included in each of the first to third display modules (120-1, 120-2, 120-3), but the present invention is not limited thereto, and according to an embodiment, the display panel (120) may include the first to n-th display modules (120-1, ..., 120-n), and the preset time intervals (for example, the time corresponding to one image frame) may be divided into n intervals.

[0068] According to an embodiment, the operation of driving each of the plurality of display modules (120-1, ..., 120-n) by dividing a preset time interval can also be expressed as time division driving.

[0069] Below, the arrangement of the first switch and the second switch included in each of the plurality of display modules (120-1, ..., 120-n) will be specifically described.

[0070] FIG. 4 is a drawing for explaining a first switch and a second switch included in a display module according to one or more embodiments of the present disclosure.

[0071] Referring to FIG. 4, the display device (100) includes a plurality of display modules (120-1, ..., 120-n), and each of the plurality of display modules (120-1, ..., 120-n) may include a first switch and a second switch.

[0072] Referring to the first display module (120-1), when the first switch included in the first display module (120-1) is turned on, the power supply unit (110) supplies power to a plurality of light-emitting elements included in the first display module (120-1), so that the plurality of light-emitting elements can emit light.

[0073] In the past, when the first display module (120-1) was turned off, there was a problem in that the plurality of light-emitting elements included in the first display module (120-1) emitted weak light due to the remaining potential (or energy) in the plurality of light-emitting elements.

[0074] For example, conventionally, one or more processors (130) can turn off the first display module (120-1) in the second time interval (t1 to t2) and the third time interval (t2 to t3) of the preset time interval (t0 to t3), and can turn on the second switch as shown in (a) of FIG. 4 to control the first display module (120-1) so that the plurality of light-emitting elements included in the first display module (120-1) do not emit light weakly.

[0075] Referring to (a) of FIG. 4, while the first display module (120-1) is turned off, the first switch of the first display module (120-1) is turned off and the second switch is turned on, so that the potential remaining in the first display module (120-1) can be discharged to the ground (GND). For example, by providing a discharge circuit in each of a plurality of display modules (120-1, ..., 120-n), the potential remaining in the display modules other than the display module that is operating can be removed through the ground.

[0076] However, in the past, since the potential remaining in the first display module (120-1) was momentarily discharged to the ground, there was a problem in which noise was generated due to vibration of the printed circuit board (PCB) circuit constituting the first display module (120-1) or the lifespan of multiple light-emitting elements was affected.

[0077] Referring to (b) of FIG. 4, while the first display module (120-1) is turned off, the first switch of the first display module (120-1) is turned off and the second switch is turned on, so that a specific voltage is applied to the plurality of light-emitting elements of the first display module (120-1), so that the voltage change range of the plurality of light-emitting elements can be reduced compared to when the potential remaining in the first display module (120-1) falls to the ground.

[0078] FIG. 5a is a drawing for explaining the voltage change of each of a plurality of display modules according to the prior art.

[0079] FIG. 5a is a graph showing changes in the voltage of each of the plurality of display modules (120-1, ..., 120-n) when the second switch included in each of the plurality of display modules (120-1, ..., 120-n) is connected to the ground voltage (GND) as shown in (a) of FIG. 4.

[0080] Referring to the graph illustrated in the upper part of FIG. 5A, a forward voltage (Vf) for causing a plurality of light-emitting elements included in a first display module (120-1) to emit light may be applied to the plurality of light-emitting elements in a first time interval (t0 to t1) of a preset time (t0 to t3). For example, in the first time interval (t0 to t1) of a preset time (t0 to t3), one or more processors (130) may turn on a first switch and turn off a second switch so that the power supply unit (110) applies a forward voltage (Vf) to the plurality of light-emitting elements.

[0081] Next, in a second time interval (t1 to t2) and a third time interval (t2 to t3) of preset times (t0 to t3), one or more processors (130) can turn off the first switch and turn on the second switch to turn off a plurality of light-emitting elements included in the first display module (120-1).

[0082] According to an embodiment, when one or more processors (130) turn off the first switch and turn on the second switch, the voltage of the first display module (120-1) may change from a driving voltage or forward voltage (Vf) to a voltage according to ground, i.e., 0[v].

[0083] According to an embodiment, the voltage of the first display module (120-1) changes rapidly from a forward voltage (Vf) (e.g., 52 [V] to 64 [V]) to 0 [V], so that energy efficiency is reduced (e.g., energy loss rate increases) and noise may be generated due to vibration of the PCB circuit.

[0084] Referring to the graph illustrated in FIG. 5A, noise may be generated due to a sudden change in the voltage of the first display module (120-1) when the second time period (t1 to t2) begins after the first time period (t0 to t1) has elapsed, noise may be generated due to a sudden change in the voltage of the second display module (120-2) when the third time period (t2 to t3) begins after the second time period (t1 to t2), and noise may be generated due to a sudden change in the voltage of the third display module (120-3) when the next preset time period (after t3) (e.g., the next image frame) begins after the third time period (t2 to t3).

[0085] FIG. 5b is a diagram illustrating voltage changes of each of a plurality of display modules according to one or more embodiments of the present disclosure.

[0086] FIG. 5b is a graph showing changes in the voltage of each of the plurality of display modules (120-1, ..., 120-n) when the second switch included in each of the plurality of display modules (120-1, ..., 120-n) is connected to a preset voltage as shown in (b) of FIG. 4.

[0087] Referring to the graph shown on the upper side of FIG. 5B, after the first time interval (t0 to t1) of the preset time (t0 to t3) has elapsed, in the second time interval (t1 to t2) and the third time interval (t2 to t3), one or more processors (130) can turn off the first switch and turn on the second switch to turn off the plurality of light-emitting elements included in the first display module (120-1).

[0088] When the second time period (t1 to t2) starts after the first time period (t0 to t1) has elapsed, the first switch included in the first display module (120-1) is turned off and the second switch is turned on, so that the voltage of the first display module (120-1) can change from the driving voltage or forward voltage (Vf) to a preset voltage.

[0089] According to an embodiment, the preset voltage may be a voltage equal to or greater than the ground voltage (e.g., 0 [V]) and less than the forward voltage (Vf) for causing a plurality of light-emitting elements to emit light.

[0090] For example, if the forward voltage (Vf) for emitting light from a plurality of light-emitting elements included in the first display module (120-1) is 52 [V], the preset voltage may be 0 [V] or more and less than 52 [V].

[0091] Referring to the graph illustrated in FIG. 5B, when the second time period (t1 to t2) starts after the first time period (t0 to t1) has elapsed, the voltage of the first display module (120-1) decreases only by a preset voltage from the forward voltage (Vf) (e.g., the forward voltage (Vf) - the preset voltage), so that the generation of noise can be minimized, and when the third time period (t2 to t3) starts after the second time period (t1 to t2) has elapsed, the voltage of the second display module (120-2) does not change abruptly, so that the generation of noise can be minimized, and when the next preset time period (after t3 ~) (e.g., the next image frame) starts after the third time period (t2 to t3), the voltage of the third display module (120-3) does not change abruptly, so that the generation of noise can be minimized.

[0092] The relationship between the forward voltage (Vf) and the preset voltage is specifically explained with reference to the drawing below.

[0093] FIG. 6 is a diagram illustrating the relationship between output current and forward voltage according to one or more embodiments of the present disclosure.

[0094] Referring to FIG. 6, the forward voltage (Vf) of each of the plurality of light-emitting elements included in each of the plurality of display modules (120-1, ..., 120-n) is not a fixed voltage and may change depending on the size of the forward current (Forward Current, If).

[0095] For example, as the forward current (If) increases, the forward voltage (Vf) may also increase.

[0096] According to an embodiment, one or more processors (130) may adjust the driving voltage (i.e., forward voltage (Vf)) based on the output current (i.e., forward current (If)) of the power supply (110).

[0097] For example, one or more processors (130) may increase the forward voltage (Vf) as the output current of the power supply (110) increases.

[0098] In some embodiments, one or more processors (130) may adjust the preset voltage to be less than the adjusted forward voltage (Vf), for example, increasing the preset voltage as the forward voltage increases.

[0099] For example, when the output current of the power supply unit (110) increases, the forward voltage (Vf) at which each of the plurality of light-emitting elements included in each of the plurality of display modules (120-1, ..., 120-n) emits light may also increase.

[0100] According to an embodiment, one or more processors (130) may increase a preset voltage so that the voltage of each of the plurality of display modules (120-1, ..., 120-n) does not change abruptly when the forward voltage (Vf) increases.

[0101] Referring to the graph illustrated in FIG. 5b, when the second time period (t1 to t2) begins after the first time period (t0 to t1) has elapsed, the voltage of the first display module (120-1) decreases by a preset voltage from the forward voltage (Vf) (e.g., forward voltage (Vf) - preset voltage), so that one or more processors (130) can also increase the preset voltage when the forward voltage (Vf) increases in order to reduce the amount of change in the voltage.

[0102] As another example, one or more processors (130) may reduce the preset voltage to be less than the forward voltage (Vf) when the forward voltage (Vf) decreases.

[0103] Referring to the graph illustrated in FIG. 5b, when the second time period (t1 to t2) begins after the first time period (t0 to t1) has elapsed, the voltage of the first display module (120-1) must decrease from the forward voltage (Vf) to a preset voltage so that the plurality of light-emitting elements included in the first display module (120-1) do not emit light. Therefore, when the forward voltage (Vf) decreases, one or more processors (130) can also decrease the preset voltage.

[0104] FIG. 7 is a diagram illustrating the relationship between temperature and forward voltage according to one or more embodiments of the present disclosure.

[0105] Referring to FIG. 7, the forward voltage (Vf) of each of the plurality of light-emitting elements included in each of the plurality of display modules (120-1, ..., 120-n) is not a fixed voltage and may vary depending on the ambient temperature.

[0106] For example, as the ambient temperature increases, the forward voltage (Vf) may decrease.

[0107] According to an embodiment, one or more processors (130) may reduce a preset voltage to be less than the reduced forward voltage (Vf) when the forward voltage (Vf) decreases due to an ambient temperature. For example, one or more processors (130) may reduce a preset voltage to be more than 0 [V] and less than the reduced forward voltage (Vf) when the ambient temperature increases and the forward voltage (Vf) decreases.

[0108] As another example, one or more processors (130) may increase a preset voltage to reduce the amount of voltage change when the forward voltage (Vf) increases depending on the ambient temperature. For example, when the ambient temperature decreases and the forward voltage (Vf) increases, one or more processors (130) may increase a preset voltage to prevent problems such as noise generation or an impact on the lifespan of a light-emitting element due to an increase in the difference between the increased forward voltage (Vf) and the preset voltage.

[0109] FIG. 8 is a flowchart illustrating a method for controlling a display device according to one or more embodiments of the present disclosure.

[0110] A control method of a display device that sequentially supplies power to a plurality of display modules through a power supply unit according to an embodiment of the present disclosure includes: turning on a first switch among a first switch and a second switch included in a first display module among a plurality of display modules during a first time period within a preset time period; and turning on a second switch among the first switch and the second switch included in a second display module to supply power to the first display module (S810).

[0111] Next, in a second time interval within a preset time, a first switch included in a second display module among a plurality of display modules is turned on, and a second switch included in the first display module is turned on to supply power to the second display module (S820).

[0112] The step S810 of supplying power to the first display module may include a step of turning on a first switch included in the first display module and turning off a second switch in a first time interval to cause a plurality of light-emitting elements included in the first display module to emit light, and a step of turning off a first switch included in the second display module and turning on a second switch in a first time interval to cause a plurality of light-emitting elements included in the second display module to turn off.

[0113] The step S820 of supplying power to the second display module may include a step of turning off the first switch included in the first display module and turning on the second switch in a second time interval following the first time interval to turn off the plurality of light-emitting elements included in the first display module, and a step of turning on the first switch included in the second display module and turning off the second switch in a second time interval to cause the plurality of light-emitting elements included in the second display module to emit light.

[0114] The step S810 of supplying power to the first display module according to an embodiment of the present disclosure includes the step of providing a preset voltage to a plurality of light-emitting elements included in the second display module in a first time period, and the step S820 of supplying power to the second display module may provide a preset voltage to a plurality of light-emitting elements included in the first display module in a second time period.

[0115] A control method according to an embodiment of the present disclosure further includes a step of supplying a driving voltage to one of a plurality of display modules in which a first switch is turned on, wherein the preset voltage may be less than the driving voltage.

[0116] The preset voltage according to an embodiment of the present disclosure may be higher than the voltage according to grounding and lower than the forward voltage (Vf) of the plurality of light-emitting elements included in each of the plurality of display modules.

[0117] A control method according to an embodiment of the present disclosure may further include a step of adjusting a driving voltage based on an output current of a power supply unit and a step of adjusting a preset voltage to be less than the adjusted driving voltage.

[0118] A display device according to an embodiment of the present disclosure operates in a passive matrix manner, and each of a plurality of display modules can correspond to each of a plurality of scan lines.

[0119] The preset time according to an embodiment of the present disclosure corresponds to one image frame, and the control method may further include a step of sequentially supplying power to a plurality of display modules during one image frame.

[0120] Each of the plurality of display modules according to an embodiment of the present disclosure may include a backlight or a plurality of self-luminous elements.

[0121] However, it goes without saying that the various embodiments of the present disclosure can be applied not only to display devices but also to all types of electronic devices equipped with displays.

[0122] Meanwhile, the various embodiments described above may be implemented in a computer-readable recording medium or similar device using software, hardware, or a combination thereof. In some cases, the embodiments described herein may be implemented by the processor itself. In a software implementation, embodiments, such as the procedures and functions described herein, may be implemented as separate software modules. Each of the software modules may perform one or more functions and operations described herein.

[0123] Meanwhile, computer instructions for performing processing operations of an electronic device according to various embodiments of the present disclosure described above may be stored in a non-transitory computer-readable medium. When the computer instructions stored in such a non-transitory computer-readable medium are executed by a processor of a specific device, the computer instructions cause the specific device to perform processing operations in the electronic device according to various embodiments described above.

[0124] A non-transitory computer-readable medium refers to a medium that permanently stores data and can be read by a device, rather than a medium that stores data for a short period of time, such as a register, cache, or memory. Specific examples of non-transitory computer-readable media include CDs, DVDs, hard disks, Blu-ray discs, USBs, memory cards, and ROMs.

[0125] Although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person having ordinary skill in the art to which the present disclosure pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. Power supply; A first display module including a first switch connected to the power supply and a second switch connected to a preset voltage; and A second display module including a third switch connected to the power supply and a fourth switch connected to the preset voltage; and One or more processors that selectively turn on the first switch, the second switch, the third switch and the fourth switch included in each of the first display module and the second display module; and A memory for storing instructions; When the above instructions are executed by the one or more processors, the electronic device: A display device that turns on the first switch and the fourth switch during a first time period within a preset time, and turns on the second switch and the third switch during a second time period within the preset time.

2. In paragraph 1, The above instructions cause the electronic device to turn on the first switch and turn off the second switch during the first time interval to emit light using the first light-emitting element in the first display module. A display device, wherein the third switch is turned off and the fourth switch is turned on during the first time period to turn off the second light-emitting element in the second display module.

3. In paragraph 2, The above instructions cause the electronic device to: During the second time period following the first time period, the first switch is turned off and the second switch is turned on to turn off the first light-emitting element. A display device that emits light by using the second light-emitting element by turning on the third switch and turning off the fourth switch during the second time period.

4. In paragraph 3, The above instructions cause the electronic device to: During the first time period, the preset voltage is provided to the second light-emitting element, A display device, which provides the preset voltage to the first light-emitting element during the second time period.

5. In paragraph 2, The above power supply unit, Supplying a driving voltage to the first display module turned on by the first switch or the second display module turned on by the third switch under the control of the one or more processors; The above preset voltage is, A display device having a driving voltage lower than the above.

6. In paragraph 5, The above preset voltage is, A display device, wherein the forward voltage (Vf) of the first light-emitting element and the second light-emitting element is higher than or equal to the ground voltage.

7. In paragraph 5, The above instructions cause the electronic device to: The driving voltage is adjusted based on the output current of the power supply unit, A display device that adjusts the preset voltage to be less than the adjusted driving voltage.

8. In paragraph 1, The above display device, It operates in a passive matrix manner. The above first display module corresponds to the first scan line, The second display module is a display device corresponding to the second scan line.

9. In paragraph 1, The above preset time is, Corresponds to one image frame, The above instructions cause the electronic device to: A display device that sequentially supplies power to the first display module and the second display module during the one image frame.

10. In paragraph 1, The above first display module and the above second display module, A display device comprising a backlight or multiple self-luminous elements.

11. A method for controlling a display device that sequentially supplies power to a first display module and a second display module through a power supply unit, the method comprising: A step of supplying power to the first display module by turning on a first switch connected to the power supply unit within the first display module and turning on a fourth switch connected to a preset voltage within the second display module during a first time interval within a preset time; and A control method comprising: a step of turning on a third switch connected to the power supply unit within the second display module and turning on a second switch connected to the preset voltage within the first display module to supply power to the second display module during a second time period within the preset time; 12. In paragraph 11, The step of supplying power to the above first display module is: A step of turning on the first switch and turning off the second switch during the first time period to emit light using the first light-emitting element in the first display module; and A control method, comprising: a step of turning off the third switch and turning on the fourth switch during the first time period to turn off the second light-emitting element in the second display module.

13. In paragraph 12, The step of supplying power to the second display module is: A step of turning off the first switch and turning on the second switch to turn off the first light-emitting element during the second time period following the first time period; and A control method, comprising: a step of turning on the third switch and turning off the fourth switch during the second time period to emit light using the second light-emitting element.

14. In paragraph 13, The step of supplying power to the above first display module is: A step of providing the preset voltage to the second light-emitting element during the first time period; The step of supplying power to the second display module is: A display that provides the preset voltage to the first light-emitting element during the second time period 15. In paragraph 11, The above control method is, It further includes a step of supplying a driving voltage to the first display module in which the first switch is turned on or the second display module in which the third switch is turned on; The above preset voltage is, A control method having a driving voltage lower than the above.

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