Display device and operation method therefor

Abstract

A display device according to an embodiment of the present invention may comprise: a battery; a display; a power terminal which receives power from an external power source; and a controller which determines whether a battery power saving mode is disabled when disconnecting from the external power source, and controls the display so that the brightness of a screen gradually decreases according to the charge ratio of the battery if the battery power saving mode is disabled and a non-input period for user input lasts at least a certain period of time.

Description

Display device and method of operation thereof

[0001] The present disclosure relates to a display device, and more particularly, to a display device capable of saving battery power.

[0002] As the information society develops, the demand for display devices is also increasing in various forms, and in response to this, various display devices such as LCD (Liquid Crystal Display Device), PDP (Plasma Display Panel), ELD (Electro luminescent Display), VFD (Vacuum Fluorescent Display), and OLED (Organic Light Emitting Diode) are being researched and used in recent years.

[0003] Among these, the LCD panel has a TFT substrate and a color substrate that face each other with a liquid crystal layer in between, and can display images using light provided from a backlight unit. In addition, the OLED panel can display images by depositing an organic layer capable of self-luminescence on a substrate on which a transparent electrode is formed.

[0004] Recently, stand-type display devices have been released, including a head containing a display and a stand supporting the head. Unlike conventional TVs, stand-type display devices have a structure that allows for easy movement.

[0005] The stand type display device is equipped with a battery and is powered by the battery.

[0006] When a stand-type display device with a battery is disconnected from the power source (the adapter is disconnected), the brightness is reduced by 50% due to the battery saving mode.

[0007] In this case, the user will notice a sudden decrease in brightness as the adapter enters battery saving mode when it is disconnected.

[0008] This often results in the battery saving mode being disabled and used, which reduces the battery life and makes the stand type display device less usable.

[0009] An object of the present disclosure may be to maintain battery power saving effects while minimizing a user's perceived brightness reduction when the display device is battery-powered.

[0010] An object of the present disclosure may be to maintain battery power saving effects while minimizing screen brightness increase due to user input when a display device is powered by a battery.

[0011] A display device according to an embodiment of the present disclosure may include a battery, a display, a power terminal that receives power from an external power source, and a controller that determines whether a battery power saving mode is released when the battery power saving mode is released and a user input is not input for a predetermined period of time or longer, and controls the display to gradually reduce the brightness of the screen according to a charge rate of the battery.

[0012] A method of operating a display device having a battery, a display, and a power terminal that receives power from an external power source according to an embodiment of the present disclosure may include a step of determining whether a battery power saving mode is released when the device is disconnected from the external power source, and a step of controlling the display to gradually reduce the brightness of the screen according to a charge rate of the battery when the battery power saving mode is released and a period of no user input is longer than a predetermined period of time.

[0013] According to an embodiment of the present disclosure, when the battery-saving mode is released, the screen brightness may be gradually reduced, thereby slowing down the user's visual perception of the reduced brightness. Furthermore, the reduced screen brightness may conserve battery power, thereby increasing the display device's usage time.

[0014] According to an embodiment of the present disclosure, a battery saving effect can be achieved by gradually increasing the brightness of the screen by user input.

[0015] FIG. 1A and FIG. 1B are drawings explaining the structure of a display device according to an embodiment of the present disclosure.

[0016] FIG. 2 is a block diagram illustrating the configuration of a display device according to one embodiment of the present disclosure.

[0017] FIG. 3 is a flowchart for explaining an operating method of a display device according to an embodiment of the present disclosure.

[0018] Figure 4 is a graph showing changes in screen brightness when the power mode of the display device enters battery saving mode.

[0019] FIG. 5 is a drawing explaining a process in which the brightness of the screen changes according to the battery charge ratio when the battery power saving mode is released according to an embodiment of the present disclosure.

[0020] FIG. 6a is a drawing illustrating the structure of a display device including a battery provided in a head according to one embodiment of the present disclosure, and FIG. 6b is a drawing illustrating the structure of a display device including a battery provided in each of a head and a stand according to another embodiment of the present disclosure.

[0021] Hereinafter, embodiments related to the present invention will be described in more detail with reference to the drawings. The suffixes "module" and "part" used in the following description for components are assigned or used interchangeably solely for the convenience of writing the specification, and do not in themselves have distinct meanings or roles.

[0022] The direction indications of up (U), down (D), left (Le), right (Ri), front (F), and back (R) shown in the drawings are only for convenience of explanation, and the technical ideas disclosed in this specification are not limited thereby.

[0023] A display device according to an embodiment of the present invention is, for example, an intelligent display device that adds computer-assisted functionality to its broadcast reception function. While faithfully performing the broadcast reception function, it can also be equipped with Internet functionality and other features, providing a more user-friendly interface, such as a manual input device, touch screen, or space remote control. Furthermore, with support for wired or wireless Internet functionality, it can connect to the Internet and a computer, enabling functions such as email, web browsing, banking, or gaming. A standardized, general-purpose operating system can be used for these various functions.

[0024] Accordingly, the display device described in the present invention can perform various user-friendly functions, for example, by allowing various applications to be freely added or deleted on a general-purpose operating system kernel. More specifically, the display device can be a network TV, HBB TV, smart TV, LED TV, OLED TV, etc., and in some cases, it can also be applied to smartphones.

[0025] FIG. 1A and FIG. 1B are drawings explaining the structure of a display device according to an embodiment of the present disclosure.

[0026] Referring to FIGS. 1A and 1B, a display device (1) may include a head (10). The head (10) may include a display panel (11) that displays an image.

[0027] The head (10) may be referred to as a display (10) or a display unit (10).

[0028] The head (10) may include a first long side (LS1), a second long side (LS2) opposite the first long side (LS1), a first short side (SS1) adjacent to the first long side (LS1) and the second long side (LS2), and a second short side (SS2) opposite the first short side (SS1).

[0029] Meanwhile, for convenience of explanation, the lengths of the first and second long sides (LS1, LS2) are illustrated and described as being longer than the lengths of the first and second short sides (SS1, SS2), but it may also be possible for the lengths of the first and second long sides (LS1, LS2) to be approximately equal to the lengths of the first and second short sides (SS1, SS2).

[0030] The direction parallel to the short sides (SS1, SS2) of the head (10) may be referred to as the up-down direction or the first direction (DR1). The direction parallel to the long sides (LS1, LS2) of the head (10) may be referred to as the left-right direction or the second direction (DR2). The direction perpendicular to the short sides (SS1, SS2) and long sides (LS1, LS2) of the head (10) may be referred to as the front-back direction or the third direction (DR3).

[0031] The direction in which the head (10) displays the image may be referred to as the forward (F, z), and the opposite direction may be referred to as the backward (R). The first short side (SS1) may be referred to as the left (Le, x). The second short side (SS2) may be referred to as the right (Ri). The first long side (LS1) may be referred to as the upper side (U, y). The second long side (LS2) may be referred to as the lower side (D).

[0032] The first long side (LS1), the second long side (LS2), the first short side (SS1), and the second short side (SS2) may be referred to as edges of the head (10). The point where the first long side (LS1), the second long side (LS2), the first short side (SS1), and the second short side (SS2) meet may be referred to as a corner. The point where the first short side (SS1) and the first long side (LS1) meet may be a first corner (C1). The point where the first short side (SS1) and the second long side (LS2) meet may be a second corner (C2). The point where the second short side (SS2) and the second long side (LS2) meet may be a third corner (C3). The point where the second short side (SS2) and the first long side (LS1) meet may be a fourth corner (C4).

[0033] The display device (1) may include a stand (20, 30, 40, 50) that supports the head (10).

[0034] The stand (20, 30, 40, 50) may include a base (20), a pole (30), a swivel connector (40), and a support arm (50).

[0035] The stand (20, 30, 40, 50) can be detachably connected to the head (10).

[0036] The base (20) can be placed on the ground. The base (20) can be round or angular. A plurality of wheels (20W) can be provided on the lower surface of the base (20).

[0037] The adapter (CWc) and plug (CWa) connected to the power cable (CW) can be connected to a concentric plug that supplies external power.

[0038] The jack (CWb) of the power cable (CW) can be connected to the base (20).

[0039] The adapter (CWc) can convert external AC power into DC power and supply the converted DC power to the jack (CWb).

[0040] A battery (not shown) may be built into the base (20), pole (30), support arm (50), and / or head (10) and may be charged by power supplied through a power cable (CW). The display device (1) may be powered by the battery and operated while being separated from the power cable (CW).

[0041] The pole (30) can extend vertically from the base (20). The lower end of the pole (30) can be connected to the pole (30) adjacent to the periphery of the base (20).

[0042] The support arm (50) can extend in a direction intersecting the pole (30) and can be coupled to the upper end of the pole (30). The rotary connector (40) can be positioned between the head (10) and the support arm (50) and can be coupled to the head (10) and the support arm (50).

[0043] The head (10) can be supported by a stand (20, 30, 40, 50) and can be spaced upward from the ground.

[0044] The rotary connector (40) can rotate the head (10) up and down or left and right. When an external force is applied to the rotary connector (40), the head (10) can rotate in one or more of the up / down / left / right directions.

[0045] The rotary connector (40) and the head (10) may have a detachable structure. Accordingly, the head (10) and the stand (20, 30, 40, 50) may be separated.

[0046] FIG. 2 is a block diagram illustrating the configuration of a display device according to one embodiment of the present disclosure.

[0047] Referring to FIG. 2, the display device (1) may include a broadcast receiving unit (130), an external device interface (135), a memory (140), a user input interface (150), a controller (170), a wireless communication interface (173), a display (180), a speaker (185), and a power supply circuit (190).

[0048] Each of the broadcast receiving unit (130), external device interface (135), memory (140), user input interface (150), controller (170), wireless communication interface (173), display (180), speaker (185), and power supply circuit (190) may be provided in the head (10). However, it is not necessary to be limited thereto, and some components may be provided in the stand (20, 30, 40, 50).

[0049] The broadcast receiving unit (130) may include a tuner (131), a demodulator (132), and a network interface (133).

[0050] The tuner (131) can select a specific broadcast channel according to a channel selection command. The tuner (131) can receive a broadcast signal for the selected specific broadcast channel.

[0051] The demodulator (132) can separate the received broadcast signal into a video signal, an audio signal, and a data signal related to the broadcast program, and can restore the separated video signal, audio signal, and data signal into a form that can be output.

[0052] The external device interface (135) can receive an application or a list of applications within an adjacent external device and transmit it to the controller (170) or memory (140).

[0053] The external device interface (135) can provide a connection path between the display device (1) and the external device. The external device interface (135) can receive one or more of images and audio output from an external device connected wirelessly or wiredly to the display device (1) and transmit them to the controller (170).

[0054] The external device interface (135) may include a plurality of external input terminals. The plurality of external input terminals may include an RGB terminal, one or more HDMI (High Definition Multimedia Interface) terminals, and a component terminal.

[0055] A video signal of an external device input through an external device interface (135) can be output through a display (180). A voice signal of an external device input through an external device interface (135) can be output through a speaker (185).

[0056] An external device that can be connected to the external device interface (135) may be any one of a set-top box, a Blu-ray player, a DVD player, a game console, a sound bar, a smartphone, a PC, a USB memory, and a home theater, but this is only an example.

[0057] The external device interface (135) may be provided on one or more of the head (10) or the stand (20, 30, 40, 50).

[0058] The network interface (133) can provide an interface for connecting the display device (1) to a wired / wireless network including the Internet.

[0059] The network interface (133) can transmit or receive data to or from other users or other electronic devices via the connected network or another network linked to the connected network.

[0060] The network interface (133) can transmit some content data stored in the display device (1) to a selected user or electronic device among other users or other electronic devices pre-registered in the display device (1).

[0061] The network interface (133) can access a predetermined web page via the connected network or another network linked to the connected network. The network interface (133) can access a predetermined web page via the network and transmit or receive data with the corresponding server.

[0062] The network interface (133) can receive content or data provided by a content provider or network operator. The network interface (133) can receive content such as movies, advertisements, games, VOD, broadcast signals, and other related information provided by a content provider or network provider via a network.

[0063] The network interface (133) can receive firmware update information and update files provided by the network operator, and can transmit data to the Internet or content provider or network operator.

[0064] The network interface (133) can select and receive a desired application from among applications open to the public via a network.

[0065] The memory (140) stores a program for each signal processing and control within the controller (170), and can store signal-processed image, voice, or data signals.

[0066] The memory (140) may perform a function for temporary storage of video, audio, or data signals input from an external device interface (135) or a network interface (133), and may also store information about a specific image through a channel memory function.

[0067] The memory (140) can store an application or a list of applications input from an external device interface (135) or a network interface (133).

[0068] The display device (1) can play content files (video files, still image files, music files, document files, application files, etc.) stored in the memory (140) and provide them to the user.

[0069] The user input interface (150) can transmit a signal input by the user to the controller (170) or transmit a signal from the controller (170) to the user. For example, the user input interface (150) can receive and process control signals such as power on / off, channel selection, and screen setting from the remote control device (200) according to various communication methods such as Bluetooth, Ultra Wideband (WB), ZigBee, Radio Frequency (RF) communication, or infrared (IR) communication, or process control signals from the controller (170) to be transmitted to the remote control device (200).

[0070] The user input interface (150) can transmit control signals input from local keys (not shown) such as the power key, channel key, volume key, and setting value to the controller (170).

[0071] An image signal processed by the controller (170) can be input to the display (180) and displayed as an image corresponding to the image signal. An image signal processed by the controller (170) can be input to an external output device through an external device interface (135).

[0072] The voice signal processed by the controller (170) can be output as audio to the speaker (185). The voice signal processed by the controller (170) can be input to an external output device through the external device interface (135).

[0073] In addition, the controller (170) can control the overall operation within the display device (1).

[0074] The controller (170) can control the display device (1) by a user command or an internal program input through the user input interface (150), and can connect to a network to enable the user to download a desired application or application list into the display device (1).

[0075] The controller (170) enables the user-selected channel information, etc. to be output through a display (180) or speaker (185) together with processed video or audio signals.

[0076] The controller (170) allows a video signal or audio signal from an external device, for example, a camera or camcorder, input through the external device interface (135) to be output through the display (180) or speaker (185) in accordance with an external device video playback command received through the user input interface (150).

[0077] The controller (170) can control the display (180) to display an image, for example, a broadcast image input through a tuner (131), an external input image input through an external device interface (135), an image input through a network interface, or an image stored in a memory (140) can be controlled to be displayed on the display (180). In this case, the image displayed on the display (180) can be a still image or a moving image, and can be a 2D image or a 3D image.

[0078] The controller (170) can control the playback of content stored in the display device (1), received broadcast content, or external input content input from outside, and the content can be in various forms such as broadcast video, external input video, audio file, still image, connected web screen, and document file.

[0079] The wireless communication interface (173) can communicate with an external device through wired or wireless communication. The wireless communication interface (173) can perform short-range communication with the external device. To this end, the wireless communication interface (173) can support short-range communication using at least one of Bluetooth™, RFID (Radio Frequency Identification), Infrared Data Association (IrDA), UWB (Ultra Wideband), ZigBee, NFC (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technologies.

[0080] The wireless communication interface (173) can support wireless communication between the display device (1) and a wireless communication system, between the display device (1) and another display device (1), or between the display device (1) and a network in which the display device (100, or an external server) is located via a wireless area network. The wireless area network can be a wireless personal area network.

[0081] The wireless communication interface (173) can detect (or recognize) a wearable device capable of communication around the display device (1).

[0082] If the detected wearable device is a device certified to communicate with the display device (1) according to the present invention, the controller (170) can transmit at least a portion of the data processed in the display device (1) to the wearable device via the wireless communication interface (173). Accordingly, a user of the wearable device can utilize the data processed in the display device (1) via the wearable device.

[0083] The display (180) can generate a driving signal by converting a video signal, data signal, OSD signal processed by the controller (170) or a video signal, data signal, etc. received from an external device interface (135) into R, G, and B signals, respectively.

[0084] Meanwhile, since the display device (1) illustrated in FIG. 2 is merely an embodiment of the present invention, some of the illustrated components may be integrated, added, or omitted depending on the specifications of the display device (1) actually implemented.

[0085] That is, two or more components may be combined into a single component, or a single component may be subdivided into two or more components, as needed. Furthermore, the functions performed by each block are intended to illustrate embodiments of the present invention, and their specific operations or devices do not limit the scope of the present invention.

[0086] According to another embodiment of the present invention, the display device (1) may receive and play an image through a network interface (133) or an external device interface (135) without having a tuner (131) and a demodulator (132), unlike as shown in FIG. 2.

[0087] For example, the display device (1) may be implemented separately as an image processing device, such as a set-top box, for receiving contents according to broadcast signals or various network services, and a content playback device for playing contents input from the image processing device.

[0088] In this case, the operating method of the display device according to the embodiment of the present invention to be described below may be performed by any one of the display device (1) described with reference to FIG. 2, as well as an image processing device such as the separated set-top box, or a content playback device having a display (180) and a speaker (185).

[0089] FIG. 3 is a flowchart for explaining an operating method of a display device according to an embodiment of the present disclosure.

[0090] Referring to FIG. 3, the controller (170) of the display device (1) can determine whether the power supply is disconnected (S301).

[0091] The controller (170) may be judged to be disconnected from power when the external power is disconnected while being supplied with power by connecting the external power to the jack (CWb).

[0092] The controller (170) can determine that the power connection is disconnected when the power supplied to the jack (CWb) is cut off. The controller (170) can determine that the power connection is disconnected when the power signal input through the jack (CWb) is not detected.

[0093] The jack (CWb) may be a power terminal included in either the external device interface (135) or the power supply circuit (190).

[0094] If the controller (170) determines that the power supply is disconnected, it can determine whether the battery saving mode of the display device (1) is released (S303).

[0095] The power mode of the display device (1) may include a normal power mode and a battery power mode.

[0096] Normal power mode may be a mode in which the display device (1) is driven using power received from an external power source.

[0097] Battery power mode may be a mode in which the display device (1) is powered by a built-in battery. The battery may be built into the head (10).

[0098] Battery power modes may include battery normal mode and battery power saving mode.

[0099] Battery normal mode may be a mode that supplies power to components of the display device (1) using power charged in the battery.

[0100] Battery power saving mode may be a mode that supplies only the minimum power to the display device (1) to reduce the consumption of power charged in the battery.

[0101] The controller (170) can perform tasks such as reducing the brightness of the screen under battery saving mode, minimizing processes running in the background, or using system resources efficiently.

[0102] In one embodiment, the controller (170) may determine that the battery power saving mode is released when it receives a user input for disabling the battery power saving mode. The controller (170) may determine that the battery power saving mode is released when it receives a touch input for disabling the battery power saving mode through a power control menu item or a user input signal for disabling the battery power saving mode received from a remote control device (200).

[0103] In another embodiment, the controller (170) may determine that the battery power saving mode is disabled when the power connection is disconnected, if the battery power saving mode is set to be disabled by default.

[0104] If the controller (170) determines that the battery power saving mode is released, it can obtain the battery charge ratio and the period of non-input of user input (S305).

[0105] The battery may be mounted on either the head (10) or the stand (20, 30, 40, 50).

[0106] The charge rate of a battery indicates the state of charge of the battery, and can be expressed as SOC (Status Of Charge), which indicates the remaining capacity compared to the total capacity of the battery.

[0107] The period of no user input may be a period in which no touch input on the display (180) or remote input received from the remote control device (200) is input.

[0108] The user input may be either a touch input applied to the display (180) or a control signal received from a remote control device (200).

[0109] In one embodiment, the controller (170) can count the period of no user input from the time the battery power saving mode is released.

[0110] In another embodiment, the controller (170) can count the period of no user input from before the battery save mode is released.

[0111] Meanwhile, the controller (170) can adjust the screen brightness to a set value based on whether the battery power saving mode is released. The set value can be 100%.

[0112] The controller (170) can control the display (180) to gradually reduce brightness by unit brightness up to the first reference brightness when the battery charge ratio is within the first charge ratio range and the non-input period of user input is longer than a certain period of time (S307) (S309).

[0113] In one embodiment, the first charge ratio range may be from 90% to 50%, but this is merely an example range.

[0114] In one embodiment, the period of time is 3 minutes, but this is only an example.

[0115] In one embodiment, the initial brightness of the screen may be 100%, the first reference brightness may be 88% of the full brightness, and the unit brightness may be 4%, but these figures are for illustrative purposes only.

[0116] The controller (170) can reduce the brightness of the display (180) in three steps up to the first reference brightness based on the determination that the battery charge rate is lower than or equal to the first charge rate and the non-input period is longer than a certain period of time.

[0117] For example, the controller (170) may reduce the brightness of the screen from 100% to 88% in three steps of 4% (unit brightness) based on the determination that the battery charge ratio is within the first charge ratio range and the period of no user input is longer than a certain period of time.

[0118] The controller (170) may reduce the screen brightness by 4% each time the battery charge level decreases by a certain percentage. The certain percentage may be 0.5%, but this is merely an example.

[0119] The controller (170) can reduce the brightness of the display (180) by gradually reducing the current duty ratio of a pulse width modulation (PWM) signal supplied to the backlight unit when the display (180) is composed of a liquid crystal display (LCD) panel and a backlight unit.

[0120] As the current duty ratio is gradually reduced, the brightness of the display (180) may also be gradually reduced.

[0121] When the display (180) is composed of an organic light emitting diode (OLED) panel, the controller (170) can reduce the brightness of the display (180) by gradually reducing the current supplied to the OLEDs constituting the OLED panel.

[0122] When the battery saving mode is released, if the brightness of the display (180) is reduced from 100% to 88% at once, the user may perceive a sudden decrease in brightness. Consequently, the user may experience discomfort when watching videos.

[0123] However, according to the embodiment of the present disclosure, when the battery power saving mode is released, the brightness of the display (180) may be gradually reduced from 100% to 88%, thereby slowing down the user's visual perception. Furthermore, even when the battery power saving mode is released, the reduced brightness may conserve battery power, thereby increasing the usage time of the display device (1).

[0124] Meanwhile, the controller (170) can receive user input while the brightness of the display (180) is reduced to 88%. When the brightness of the display (180) is increased from 88% to 100%, the controller (170) can increase the brightness of the display (180) by 12% in 2% increments over 6 steps.

[0125] The controller (170) can increase the brightness of the screen by 2% whenever the battery charge percentage decreases by a certain percentage. The certain percentage may be 0.5%, but this is only an example.

[0126] When increasing brightness in response to user input, the rate of incremental brightness increase is smaller than the rate of decrease, and there may be more steps for brightness adjustment. This is to minimize battery power consumption by increasing brightness slowly.

[0127] The controller (170) can control the display (180) to gradually reduce brightness by unit brightness to a second reference brightness that is less than the first reference brightness when the battery's charge ratio is in a second charge ratio range that is less than the first charge ratio range and the non-input period is longer than a certain period (S311) (S309).

[0128] In one embodiment, the second charge ratio range may be less than 50%, but this is an exemplary range only.

[0129] In one embodiment, the period of time is 3 minutes, but this is only an example.

[0130] In one embodiment, the second reference brightness may be 80% less than the first reference brightness, and the unit brightness may be 4%, but these figures are merely examples.

[0131] The controller (170) may further reduce the brightness of the display (180) to further reduce power consumption of the battery when the charge rate of the battery is in a second charge rate range that is lower than the first charge rate range.

[0132] The controller (170) can reduce the brightness of the display (180) in five steps up to the second reference brightness based on the determination that the battery charge ratio is within the second charge ratio range and the non-input period of the user input is longer than a certain period of time.

[0133] For example, the controller (170) may reduce the brightness of the display (180) from 100% to 80% in five steps of 4% (unit brightness) based on determining that the battery charge ratio is within the second charge ratio range and that the user input has not been input for a certain period of time or longer.

[0134] The controller (170) may reduce the screen brightness by 4% each time the battery charge level decreases by a certain percentage. The certain percentage may be 0.5%, but this is merely an example.

[0135] As the current duty ratio is gradually reduced, the brightness of the display (180) may also be gradually reduced.

[0136] When the battery power saving mode is released, if the brightness of the display (180) is reduced from 100% to 80% at once, the user may perceive a sudden decrease in brightness. Consequently, the user may experience discomfort when viewing videos.

[0137] However, according to an embodiment of the present disclosure, when the battery power saving mode is released, the brightness of the display (180) may be gradually reduced from 100% to 80%, thereby slowing down the user's visual perception of the reduced brightness. In addition, the reduced brightness may conserve battery power, thereby increasing the usage time of the display device (1).

[0138] Additionally, when the battery power saving mode is released while the battery charge rate is in a second charge rate range that is lower than the first charge rate range, the brightness of the display (180) may be lowered.

[0139] Meanwhile, the controller (170) can receive user input while the brightness of the display (180) is reduced to 80%. When the brightness of the display (180) is increased from 80% to 100%, the controller (170) can increase the brightness of the display (180) by 20% in 2% increments over 10 steps.

[0140] The controller (170) can increase the brightness of the screen by 2% whenever the battery charge percentage decreases by a certain percentage. The certain percentage may be 0.5%, but this is only an example.

[0141] When increasing brightness in response to user input, the rate of incremental brightness increase is smaller than the rate of decrease, and there may be more steps for brightness adjustment. This is to prevent battery drain by increasing brightness slowly.

[0142] Figure 4 is a graph showing changes in screen brightness when the power mode of the display device enters battery saving mode.

[0143] Before the power mode of the display device (1) enters battery saving mode, the brightness of the screen may be 100%.

[0144] When the display device (1) is disconnected from power (at time t1), the power mode can be switched to battery saving mode. Accordingly, the screen brightness of the display (180) is reduced from 100% to 50%.

[0145] When the screen brightness decreases from 100% to 50%, the user may find the video unappealing due to the low brightness. Consequently, the user may disable the display device's (1) battery-saving mode. When the battery-saving mode is disabled (at time t2), the screen brightness may return to 100% from 50%. If the screen brightness switches directly from 50% to 100%, battery power consumption may increase.

[0146] In an embodiment of the present disclosure, when waking from a battery power saving mode, the brightness of the screen is gradually reduced to a specific brightness, thereby reducing battery power consumption and at the same time dulling the user's visual perception of brightness.

[0147] FIG. 5 is a drawing explaining a process in which the brightness of the screen changes according to the battery charge ratio when the battery power saving mode is released according to an embodiment of the present disclosure.

[0148] Figure 5 describes the process that occurs after the battery power saving mode of the display device (1) is released.

[0149] Before the t11 point, the screen brightness is 100% due to the battery saving mode being turned off.

[0150] The display device (1) can gradually reduce the brightness of the screen to 88% at a time point (t11) when the battery charge ratio is in the range of 50 to 90% and the period of no user input is 3 minutes or longer.

[0151] The display device (1) can control the display (180) to reduce the screen brightness to 88% in three steps of 4% each.

[0152] After the screen brightness is reduced to 88%, if a user input occurs at time t12, the display device (1) can control the display (180) to increase the screen brightness by 2%.

[0153] The screen brightness can reach 100% in increments of 2%.

[0154] Thereafter, the display device (1) can reduce the brightness of the screen when the battery charge ratio is in the range of 50 to 90% and the period of no user input has elapsed for 3 minutes (t13). The display device (1) can control the display (180) to reduce the brightness of the screen to 88% in three stages of 4% each.

[0155] After that, the display device (1) can enter the power mode of the display device (1) into the mood maker mode when the battery charge ratio is in the range of 50 to 90% and when 10 minutes have passed since the time t12, which is the time when the last user input occurred, and when no input period has elapsed (t14).

[0156] Mood Maker mode may be a mode designed to further reduce battery power consumption compared to battery saving mode. Under Mood Maker mode, a black image or standby screen may be displayed on the display (180).

[0157] As the power mode of the display device (1) enters the mood maker mode, the brightness of the screen may be further reduced from 88% to 50%.

[0158] Thereafter, the display device (1) can control the display (180) to increase the brightness of the screen from 50% to 100% at time t15 when the user input occurs. Meanwhile, the battery charge rate may be less than 50% at time t15 when the user input occurs.

[0159] After that, the display device (1) can gradually reduce the brightness of the screen to 80% at a time point (t16) when the battery charge ratio is less than 50% and 3 minutes have passed since the time point t15 when the user input occurred.

[0160] The display device (1) can control the display (180) to reduce the screen brightness to 80% in 5 steps of 4% each. That is, compared to reducing the screen brightness in 3 steps of 4% each at time t11 or time t13, the screen brightness can be reduced in 5 steps of 4% each.

[0161] This is to minimize power consumption by lowering the maximum brightness as the battery's charge percentage decreases further.

[0162] When a user input occurs at time t17 after the screen brightness is reduced to 80%, the display device (1) can control the display (180) to increase the screen brightness by 2%. The screen brightness can reach 100% as it increases by 2%.

[0163] According to an embodiment of the present disclosure, when the battery power saving mode is released, the brightness of the display (180) may be gradually reduced from 100% to 88%, thereby slowing down the user's visual perception. Furthermore, even when the battery power saving mode is released, the reduced brightness may conserve battery power, thereby increasing the usage time of the display device (1).

[0164] Additionally, according to an embodiment of the present disclosure, when a user input is applied, the brightness of the display (180) may be gradually increased from 88% to 100%, thereby slowing down the user's visual perception. Furthermore, the gradually increased brightness may conserve battery power, thereby increasing the usage time of the display device (1).

[0165] FIG. 6a is a drawing illustrating the structure of a display device including a battery provided in a head according to one embodiment of the present disclosure, and FIG. 6b is a drawing illustrating the structure of a display device including a battery provided in each of a head and a stand according to another embodiment of the present disclosure.

[0166] Referring to FIG. 6a, the display device (1) may further include a head battery (601) compared to the structure of FIG. 1b. The head battery (601) may be mounted on the rear of the head (10).

[0167] The display device (1) can control the brightness of the screen as in the embodiments of FIGS. 3 and 5 based on the charge ratio of the head battery (601) and the non-input period of user input.

[0168] Referring to FIG. 6b, the display device (1) may further include a stand battery (603) provided on the base (20) compared to the structure of FIG. 6a.

[0169] The stand battery (603) can be built into the base (20).

[0170] The display device (1) can control the brightness of the screen as in the embodiments of FIGS. 3 and 5 based on the average ratio between the charge ratio of the head battery (601) and the charge ratio of the stand battery (603) and the non-input period of the user input.

[0171] That is, in the embodiments of FIGS. 3 and 5, the charge ratio of the battery may be an average ratio between the charge ratio of the head battery (601) and the charge ratio of the stand battery (603).

[0172] When the controller (170) of the display device (1) determines that the battery power saving mode is released, it can obtain the average ratio between the charge ratio of the head battery (601) and the charge ratio of the stand battery (603) and the period of non-input of user input.

[0173] The controller (170) can control the display (180) to gradually reduce the brightness by a first unit of brightness up to the first reference brightness when the average ratio is within the first charging ratio range and the non-input period of the user input is longer than a certain period of time.

[0174] The controller (170) can control the display (180) to gradually reduce the brightness by a second unit of brightness to a second reference brightness that is less than the first reference brightness when the average ratio is in a second charge ratio range that is less than the first charge ratio range and the non-input period is longer than a certain period of time.

[0175] According to one embodiment of the present invention, the above-described method can be implemented as processor-readable code on a medium in which a program is recorded. Examples of processor-readable media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices.

[0176] The display device described above is not limited to the configuration and method of the embodiments described above, and the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

Claims

1. In the display device, battery; display; A power terminal that receives power from an external power source; and When the connection with the external power source is disconnected, a controller is included that determines whether the battery power saving mode is released, and when the battery power saving mode is released and the period of no user input is longer than a certain period of time, controls the display to gradually reduce the brightness of the screen according to the charge ratio of the battery. Display device.

2. In paragraph 1, The above controller When the charge ratio of the above battery is within the first charge ratio range, the brightness of the above screen is gradually reduced by the first unit of brightness to the first reference brightness, When the charge ratio of the above battery is in the second charge ratio range, the brightness of the above screen is gradually reduced by the first unit of brightness to the second reference brightness, The above second charging ratio range is a range smaller than the above first charging ratio range, The above second reference brightness is smaller than the above first reference brightness. Display device.

3. In paragraph 2, The above controller Each time the charge ratio of the battery decreases by a certain percentage, the brightness of the screen is gradually reduced by the unit brightness to the first reference brightness or the second reference brightness. Display device.

4. In paragraph 2, The above controller When the charge ratio of the battery is within the first charge ratio range and the user input is received, the brightness of the screen is increased stepwise by the second unit of brightness to the initial brightness, When the charge ratio of the battery is within the second charge ratio range and the user input is received, the brightness of the screen is increased stepwise by the second unit of brightness to the initial brightness, The second unit brightness is smaller than the first unit brightness. Display device.

5. In paragraph 1, The above controller Determining whether to release the battery power saving mode based on a signal received from a touch input or remote control device. Display device.

6. In paragraph 1, The above controller If the above battery saving mode is set to be disabled, when the connection to the external power source is disconnected, the battery saving mode is determined to be disabled. Display device.

7. In paragraph 1, The above display Includes a liquid crystal display panel and a backlight unit, The above controller Stepwise reducing the current duty ratio of the pulse width modulation signal supplied to the above backlight unit Display device.

8. In paragraph 1, The above display Contains an Organic Light-Emitting Diode (OLED) panel, The above controller Stepwise reduction of the current supplied to the OLED panel Display device.

9. In paragraph 1, The above battery consists of two pieces, The charge ratio of the above battery is the average ratio of the charge ratios of the two batteries. Display device.

10. In paragraph 1, The above display device Consisting of a stand and a head supported by the stand, The above head Including the above battery, display and controller, The above stand A display device comprising a power terminal, a base, a pole extending vertically from the base, a support arm extending in a direction intersecting the pole, and a rotary connector connecting the head and the support arm.

11. In paragraph 10, The above head and stand are detachable Display device.

12. In paragraph 10, The above stand Includes additional stand batteries Display device.

13. In paragraph 1, The above controller When disconnected from the external power source, the power mode of the display device enters the battery saving mode. Display device.

14. In paragraph 1, The above controller If the power signal input from the above power terminal is not detected, it is determined that the connection with the external power source is disconnected. Display device.

15. A method for operating a display device having a battery, a display, and a power terminal that receives power from an external power source, When disconnected from the external power source, a step for determining whether the battery power saving mode is released; and A step of controlling the display to gradually reduce the brightness of the screen according to the charging ratio of the battery when the battery power saving mode is released and the user input is not input for a certain period of time or longer. How the display device operates.

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