Display device and method of operation thereof

Abstract

The display device of the embodiment of the present applicationapplicationinclude: a battery; a display; a power terminal that receives power supply from an external power source; and a controller that, when connection with the external power source is released, judges whether a battery power saving mode has been released, and if the battery power saving mode has been released and a non-input period of user input is a certain period or more, controls the display to gradually reduce the brightness of the screen according to the charging ratio of the battery.

Description

Technical Field

[0001] The present invention relates to a display device, and more specifically, to a display device capable of saving battery power. Background Technology

[0002] With the development of the information society, the requirements for display devices are increasing in various forms. In response to this, in recent years, various display devices such as liquid crystal display devices (LCD), plasma display panels (PDP), electroluminescent displays (ELD), vacuum fluorescent displays (VFD), and organic light-emitting diodes (OLED) have been researched and used.

[0003] An LCD panel can have a TFT substrate and a color substrate facing each other with a liquid crystal layer between them, and displays images using light provided from a backlight unit. An OLED panel can display images by depositing a self-emissive organic layer on a substrate with transparent electrodes.

[0004] Recently, a vertical display device has been released, consisting of a head with a display and a stand supporting the head. Unlike existing TVs, the vertical display device has a structure that allows for easy movement.

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

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

[0007] In this situation, users will notice a sharp drop in brightness as the adapter is disconnected and the system enters battery-saving mode.

[0008] Therefore, in most cases, the battery saving mode will be turned off and used, which will reduce battery life and cause inconvenience to the use of the stand-up display device. Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] The purpose of this invention is to minimize the perceived decrease in brightness when the display device is powered by a battery, while maintaining the power-saving effect of the battery.

[0011] The purpose of this invention is to minimize the increase in screen brightness caused by user input while maintaining the power-saving effect of the battery when the display device is powered by a battery.

[0012] Technical solutions to the problem

[0013] The display device of this invention may include: a battery; a display; a power terminal for receiving power from an external power source; and a controller that, when disconnected from the external power source, determines whether the battery power saving mode has been deactivated. If the battery power saving mode has been deactivated and the user-inputted period of no input is longer than a certain period, the controller controls the display to gradually reduce the screen brightness according to the battery charging ratio.

[0014] The operation method of the display device, which includes a battery, a display, and a power terminal for receiving power from an external power source, according to an embodiment of the present invention, may include: determining whether a battery power-saving mode has been deactivated when disconnecting from the external power source; and controlling the display to gradually reduce the screen brightness according to the battery charging ratio if the battery power-saving mode has been deactivated and the user-inputted no-input period is longer than a certain period.

[0015] Invention Effects

[0016] According to embodiments of the present invention, since the screen brightness gradually decreases when the battery saving mode is deactivated, the user's visual perception of the decrease in brightness becomes slower. Furthermore, the battery saves power due to the reduced screen brightness, thereby increasing the usage time of the display device.

[0017] According to an embodiment of the present invention, as the brightness of the screen gradually increases due to user input, a power-saving effect on the battery can be achieved. Attached Figure Description

[0018] Figure 1a and Figure 1b This is a diagram illustrating the structure of a display device according to an embodiment of the present invention.

[0019] Figure 2 This is a block diagram illustrating the configuration of a display device according to an embodiment of the present invention.

[0020] Figure 3 This is a flowchart illustrating the operation method of the display device according to an embodiment of the present invention.

[0021] Figure 4 It is a graph showing the change in screen brightness when the display device switches from power mode to battery saving mode.

[0022] Figure 5This diagram illustrates, according to an embodiment of the present invention, the process by which the screen brightness changes according to the battery charging ratio when the battery power saving mode is deactivated.

[0023] Figure 6a This is a diagram illustrating the structure of a display device including a battery disposed on the head, according to an embodiment of the present invention. Figure 6b This is a diagram illustrating the structure of a display device including batteries respectively disposed on the head and the support, according to another embodiment of the present invention. Detailed Implementation

[0024] Hereinafter, embodiments relating to the present invention will be described in more detail with reference to the accompanying drawings. The suffixes “module” and “part” used in the following description are assigned or used interchangeably for ease of writing only, and do not have a distinguishing meaning or function from each other.

[0025] The directions shown in the accompanying drawings (U), (D), (Le), (Ri), (F), and (R) are for illustrative purposes only, and the technical concepts disclosed in this specification are not limited thereto.

[0026] The display device of this invention, for example, is an intelligent display device that adds computer support to its broadcast reception function. It faithfully retains the broadcast reception function while also adding internet functionality, thus providing an interface that is more user-friendly than handwriting input devices, touchscreens, or spatial remote controls. Furthermore, because it supports wired or wireless internet functionality, it can connect to the internet and computers, enabling functions such as email, web browsing, banking, or gaming. To achieve these diverse functions, a standardized general-purpose operating system (OS) can be used.

[0027] Therefore, the display device described in this invention can freely add or remove various applications on a general-purpose OS kernel, thus enabling the execution of various user-friendly functions. More specifically, the display device can be, for example, a network TV, a hybrid broadcast broadband TV (HBBTV), a smart TV, an LED TV, an OLED TV, etc., and depending on the circumstances, it can also be applied to smartphones.

[0028] Figure 1a and Figure 1b This is a diagram illustrating the structure of a display device according to an embodiment of the present invention.

[0029] Reference Figure 1a and Figure 1b The display device 1 may include a head 10. The head 10 may include a display panel 11 for displaying images.

[0030] The head 10 can be referred to as display 10 or display unit 10.

[0031] The head 10 may include a first long side LS1, a second long side LS2 opposite to 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 to the first short side SS1.

[0032] On the other hand, for ease of explanation, the lengths of the first long side LS1 and the second long side LS2 are shown and explained as being longer than the lengths of the first short side SS1 and the second short side SS2, but it is also possible that the lengths of the first long side LS1 and the second long side LS2 are approximately the same as the lengths of the first short side SS1 and the second short side SS2.

[0033] The direction parallel to the short sides SS1 and SS2 of the head 10 can be called the up-down direction or the first direction DR1. The direction parallel to the long sides LS1 and LS2 of the head 10 can be called the left-right direction or the second direction DR2. The direction perpendicular to the short sides SS1 and SS2 and the long sides LS1 and LS2 of the head 10 can be called the front-back direction or the third direction DR3.

[0034] The direction in which the image is displayed on the head 10 can be called the front (F, z), and the opposite direction can be called the rear (R). The first short side SS1 can be called the left side (Le, x). The second short side SS2 can be called the right side (Ri). The first long side LS1 can be called the upper side (U, y). The second long side LS2 can be called the lower side (D).

[0035] The first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 can be referred to as the edges of the head 10. The points where these three sides meet are called corners. The point where the first short side SS1 meets the first long side LS1 can be the first corner C1. The point where the first short side SS1 meets the second long side LS2 can be the second corner C2. The point where the second short side SS2 meets the second long side LS2 can be the third corner C3. The point where the second short side SS2 meets the first long side LS1 can be the fourth corner C4.

[0036] The display device 1 may include supports 20, 30, 40, and 50 for supporting the head 10.

[0037] The brackets 20, 30, 40, and 50 may include a base 20, a rod 30, a rotary connector 40, and a support arm 50.

[0038] Brackets 20, 30, 40, and 50 can be detachably attached to head 10.

[0039] The base 20 can be placed on the ground. The base 20 can be circular or angular. A plurality of wheels 20W can be set on the bottom surface of the base 20.

[0040] The adapter CWc and plug CWa, which are connected to the power cord CW, can be connected to a concentric plug that supplies external power.

[0041] The power cord CW's socket CWb can be connected to the base 20.

[0042] The adapter CWc can convert external AC power to DC power and supply the converted DC power to the jack CWb.

[0043] A battery (not shown) may be built into the base 20, rod 30, support arm 50, and / or head 10, and is charged by power supplied via a power cord CW. The display device 1 can receive power from the battery and operate in a state disconnected from the power cord CW.

[0044] The rod 30 can extend vertically from the base 20. The lower end of the rod 30 can be adjacent to the periphery of the base 20, and the rod 30 is joined to the periphery of the base 20.

[0045] The support arm 50 can extend in a direction intersecting with the rod 30 and can be engaged with the upper end of the rod 30. The rotary connector 40 can be located between the head 10 and the support arm 50 and can be engaged with the head 10 and the support arm 50.

[0046] The head 10 can be supported by brackets 20, 30, 40, and 50, and can be separated from the ground and upward side.

[0047] The rotary connector 40 allows the head 10 to rotate up and down or left and right. If an external force is applied to the rotary connector 40, the head 10 can rotate in more than one of the up / down / left / right directions.

[0048] The rotary connector 40 and the head 10 can have a detachable structure. Thus, the head 10 and the brackets 20, 30, 40, and 50 can be separated.

[0049] Figure 2 This is a block diagram illustrating the configuration of a display device according to an embodiment of the present invention.

[0050] Reference Figure 2 The display device 1 may include a broadcast receiver 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.

[0051] The broadcast receiver 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 can be respectively disposed on the head 10. However, it is not limited thereto, and some components can also be disposed on the brackets 20, 30, 40, and 50.

[0052] The broadcast receiver 130 may include a tuner 131, a demodulator 132, and a network interface 133.

[0053] Tuner 131 can select a specific broadcast channel according to a channel selection command. Tuner 131 can receive the broadcast signal of the selected specific broadcast channel.

[0054] The demodulator 132 can separate the received broadcast signal into video signal, audio signal and data signal related to the broadcast program, and can restore the separated video signal, audio signal and data signal into an output form.

[0055] The external device interface 135 can receive applications or application directories from nearby external devices and transmit them to the controller 170 or the memory 140.

[0056] External device interface 135 can provide a connection path between display device 1 and external devices. External device interface 135 can receive one or more of images and audio output from external devices connected to display device 1 wirelessly or via wired means, and transmit them to controller 170.

[0057] External device interface 135 may include a plurality of external input terminals. The plurality of external input terminals may include RGB terminals, one or more HDMI (High Definition Multimedia Interface) terminals, and component terminals.

[0058] Image signals from external devices input via external device interface 135 can be output via display 180. Audio signals from external devices input via external device interface 135 can be output via speaker 185.

[0059] The external device that can be connected to the external device interface 135 can be one of the following: a set-top box, a Blu-ray player, a DVD player, a game console, a soundbar, a smartphone, a PC, a USB storage device, or a home theater system, but this is just an example.

[0060] The external device interface 135 can be provided in one or more of the head 10 and the brackets 20, 30, 40, and 50.

[0061] Network interface 133 can provide an interface for connecting display device 1 to wired / wireless networks, including the Internet.

[0062] Network interface 133 can send or receive data with other users or other electronic devices through the connected network or other networks linked to the connected network.

[0063] Network interface 133 can send partial content data stored in display device 1 to other users or selected users or electronic devices that are pre-registered in display device 1 or other electronic devices.

[0064] Network interface 133 can connect to a specified webpage via the connected network or other networks linked to the connected network. Network interface 133 can send or receive data with the corresponding server via the network to the specified webpage.

[0065] Network interface 133 can receive content or data provided by a content provider or network operator. Network interface 133 can receive content such as movies, advertisements, games, video on demand (VOD), and broadcast signals, as well as related information, provided by a content provider or network provider via the network.

[0066] Network interface 133 can receive firmware update information and update files provided by network operators and send data to the Internet or content providers or network operators.

[0067] Network interface 133 can select and receive desired applications from publicly available applications via the network.

[0068] The memory 140 can store programs for signal processing and control within the controller 170, and can also store processed image, voice, or data signals.

[0069] The memory 140 can also perform the function of temporarily storing image, voice or data signals input from the external device interface 135 or the network interface 133, and can also store information about a specified image through the channel memory function.

[0070] The memory 140 can store applications or application directories input from the external device interface 135 or the network interface 133.

[0071] Display device 1 can play content files (video files, still image files, music files, document files, application files, etc.) stored in memory 140 and provide them to the user.

[0072] User input interface 150 can transmit user-input signals to controller 170, or transmit signals from controller 170 to the user. For example, user input interface 150 can receive and process control signals such as power on / off, channel selection, and screen settings from remote control device 200 according to various communication methods such as Bluetooth, WB (UltraWideband), ZigBee, RF (Radio Frequency), or infrared (IR) communication, or process control signals from controller 170 to send to remote control device 200.

[0073] User input interface 150 can transmit control signals input from local keys (not shown), such as power button, channel button, volume button, and setting value, to controller 170.

[0074] The image signal processed by the controller 170 can be input to the display 180 and displayed as an image corresponding to the corresponding image signal. The image signal processed by the controller 170 can be input to an external output device through the external device interface 135.

[0075] The voice signal processed in controller 170 can be output to speaker 185. The voice signal processed in controller 170 can also be input to an external output device via external device interface 135.

[0076] In addition, the controller 170 can control the overall operation within the display device 1.

[0077] The controller 170 can control the display device 1 using user commands or internal programs input through the user input interface 150, and can connect to a network and download the user's required applications or application directories to the display device 1.

[0078] The controller 170 outputs the channel information selected by the user, along with the processed image or voice signal, through the display 180 or the speaker 185.

[0079] The controller 170 can output image or audio signals from an external device (e.g., from a camera or camcorder) input through the external device interface 135 via the display 180 or speaker 185, based on an external device image playback command received through the user input interface 150.

[0080] The controller 170 can control the display 180 to display images. For example, it can control the display 180 to display broadcast images input via the tuner 131, externally input images input via the external device interface 135, images input via the network interface, or images stored in the memory 140. In this case, the image displayed on the display 180 can be a still image or a video, and can be a 2D image or a 3D image.

[0081] The controller 170 can control the playback of content stored in the display device 1 or received broadcast content, or externally input content, which can be in various forms such as broadcast images, externally input images, audio files, still images, linked web pages, and document files.

[0082] The wireless communication interface 173 can communicate with external devices via wired or wireless communication. The wireless communication interface 173 can perform short-range communication with external devices. For this purpose, the wireless communication interface 173 can utilize at least one of the following technologies to support short-range communication: 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 Universal Serial Bus.

[0083] The wireless communication interface 173 can support wireless communication between the display device 1 and the wireless communication system, between the display device 1 and other display devices 1, or between the display device 1 and the network where the display device 100 (or an external server) is located, through a wireless area network. The wireless area network can be a wireless personal area network.

[0084] The wireless communication interface 173 can detect (or identify) communicable wearable devices around the display device 1.

[0085] If the detected wearable device is a certified device capable of communicating with the display device 1 of the present invention, the controller 170 may transmit at least a portion of the data processed in the display device 1 to the wearable device via the wireless communication interface 173. Therefore, the user of the wearable device can utilize the data processed in the display device 1 through the wearable device.

[0086] The display 180 can convert the image signals, data signals, OSD (On Screen Display) signals processed by the controller 170 or the image signals and data signals received from the external device interface 135 into R, G, and B signals respectively and generate drive signals.

[0087] on the other hand, Figure 2 The display device 1 shown is only one embodiment of the present invention. Therefore, some of the constituent elements shown may be integrated, added or omitted according to the specifications of the actual display device 1.

[0088] That is, as needed, two or more constituent elements can be combined into one constituent element, or one constituent element can be subdivided into two or more constituent elements. Furthermore, the functions performed in each module are for illustrating embodiments of the present invention, and their specific actions or devices do not limit the scope of the claims of the present invention.

[0089] According to another embodiment of the present invention, with Figure 2 Unlike the previous example, the display device 1 may not have a tuner 131 and a demodulator 132, and may also receive and play images through a network interface 133 or an external device interface 135.

[0090] For example, the display device 1 can be implemented separately as an image processing device, such as a set-top box for receiving broadcast signals or content from various network services, and a content playback device for playing content input from the image processing device.

[0091] In this case, the operation method of the display device of the present invention described below can be derived not only from the reference... Figure 2 The operation described is performed by the display device 1, or it can be performed by any of the separate image processing device such as a set-top box and the content playback device provided with a display 180 and a speaker 185.

[0092] Figure 3 This is a flowchart illustrating the operation method of the display device according to an embodiment of the present invention.

[0093] Reference Figure 3The controller 170 of the display device 1 can determine whether the power supply connection has been disconnected (S301).

[0094] When the socket CWb is connected to an external power source and receiving power, if the external power source is disconnected, the controller 170 can determine that the power supply connection has been disconnected.

[0095] If the power supply to jack CWb is cut off, controller 170 can determine that the power connection has been severed. If no power signal is detected input through jack CWb, controller 170 can determine that the power connection has been severed.

[0096] The jack CWb can be a power terminal included in either the external device interface 135 or the power supply circuit 190.

[0097] If it is determined that the power supply connection has been disconnected, the controller 170 can determine whether the battery power saving mode of the display device 1 has been deactivated (S303).

[0098] The power mode of the display device 1 may include a normal power mode and a battery power mode.

[0099] The general power mode can be a mode in which the display device 1 is driven by power received from an external power source.

[0100] The battery-powered mode can be a mode in which the display device 1 is driven by a built-in battery. The battery can be built into the head 10.

[0101] Battery power modes can include normal battery mode and battery power saving mode.

[0102] The battery normal mode can be a mode in which the power supplied to the components of the display device 1 is powered by the power supplied to the battery.

[0103] The battery saving mode is a mode that supplies only the minimum amount of power to the display device 1 in order to reduce the power consumption of charging the battery.

[0104] The controller 170 can perform operations such as reducing screen brightness, minimizing background processes, or efficiently using system resources in battery-saving mode.

[0105] In one embodiment, if a user input for disabling the battery power saving mode is received, the controller 170 can determine that the battery power saving mode has been deactivated. The controller 170 can also determine that the battery power saving mode has been deactivated if a touch input for disabling the battery power saving mode is received via a power control menu item, or if a user input signal for disabling the battery power saving mode is received from the remote control device 200.

[0106] In another embodiment, if the default setting is to disable battery power saving mode, the controller 170 can determine that battery power saving mode has been disabled when the power connection is disconnected.

[0107] If it is determined that the battery power saving mode has been deactivated, the controller 170 can obtain the battery charging ratio and the period of no input by the user (S305).

[0108] The battery can be located in one of the head 10 and the brackets 20, 30, 40, and 50.

[0109] The charging ratio of a battery indicates its state of charge, which can be expressed as the SOC (Status of Charge) representing the remaining capacity relative to the battery's total capacity.

[0110] The period during which no user input is received can be the period during which touch input on display 180 and remote input received from remote control device 200 are not input.

[0111] User input can be either touch input applied to the display 180 or control signals received from the remote control device 200.

[0112] In one embodiment, the controller 170 can start counting the periods of no user input from the time when the battery saving mode is deactivated.

[0113] In another embodiment, the controller 170 can start counting periods of no user input from before the time when the battery saving mode is deactivated.

[0114] On the other hand, the controller 170 can adjust the screen brightness to a set value based on the fact that the battery saving mode has been deactivated. The set value can be 100%.

[0115] If the battery charging ratio is within the first charging ratio range, and the period of no input by the user is a certain period of time or more (S307), then the controller 170 can control the display 180 to gradually reduce the brightness by unit brightness until it is reduced to the first reference brightness (S309).

[0116] In one embodiment, the first charging percentage range may be 90% to 50%, but this is only an example range.

[0117] In one embodiment, the time period is 3 minutes, but this is just an example value.

[0118] In one embodiment, the initial brightness of the screen may be 100%, the first reference brightness may be 88% of the total brightness, and the unit brightness may be 4%, but these are just example values.

[0119] The controller 170 can reduce the brightness of the display 180 to the first reference brightness in three steps based on the determination that the battery charging ratio is above the first charging ratio and the period without input is above a certain period.

[0120] For example, controller 170 can reduce the screen brightness from 100% to 88% in three steps, at a rate of 4% per unit brightness, based on the determination that the battery charging ratio is within a first charging ratio range and that the period of no input by the user is a certain period of time.

[0121] The controller 170 can reduce the screen brightness by 4% for every certain percentage decrease in the battery's charging percentage. This certain percentage could be 0.5%, but this is just an example.

[0122] If the display 180 consists of a liquid crystal display (LCD) panel and a backlight unit, the controller 170 can reduce the brightness of the display 180 by gradually decreasing the current duty cycle of the pulse width modulation (PWM) signal supplied to the backlight unit.

[0123] As the current duty cycle gradually decreases, the brightness of the display 180 can also gradually decrease.

[0124] If the display 180 is made 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 OLED that makes up the OLED panel.

[0125] When battery power saving mode is disabled, if the monitor's brightness suddenly decreases from 100% to 88% at one point, the user may perceive a sudden drop in brightness. This could cause inconvenience when viewing images.

[0126] However, according to an embodiment of the present invention, when the battery power saving mode is deactivated, the brightness of the display 180 is gradually reduced from 100% to 88%, thereby reducing the user's visual perception. Furthermore, even when the battery power saving mode is deactivated, the reduced brightness saves battery power, thereby increasing the usage time of the display device 1.

[0127] On the other hand, the controller 170 can receive user input when the brightness of the display 180 is reduced to 88%. When increasing the brightness of the display 180 from 88% to 100%, the controller 170 can increase the brightness of the display 180 by 12% in 6 steps at a rate of 2%.

[0128] The controller 170 can increase the screen brightness by 2% for every certain percentage decrease in the battery's charging percentage. This certain percentage could be 0.5%, but this is just an example.

[0129] When brightness is increased based on user input, the rate of increase can be less than the rate of decrease, and more steps can be taken for brightness adjustment. This is to minimize battery consumption by increasing brightness gradually.

[0130] If the battery charging ratio is within a second charging ratio range that is less than the first charging ratio range, and the period without input is a certain period of time or more (S311), then the controller 170 can control the display 180 to gradually reduce the brightness by unit brightness until it is reduced to a second reference brightness that is less than the first reference brightness (S309).

[0131] In one embodiment, the second charging ratio range may be less than 50%, but this is only an example range.

[0132] In one embodiment, the time period may be 3 minutes, but this is just an example value.

[0133] In one embodiment, the second reference brightness may be less than 80% of the first reference brightness, and the unit brightness may be 4%, but these are just example values.

[0134] If the battery charging ratio is in a second charging ratio range that is less than the first charging ratio range, the controller 170 can further reduce the brightness of the display 180 to further reduce battery power consumption.

[0135] The controller 170 can reduce the brightness of the display 180 to the second reference brightness in 5 steps based on the determination that the battery charging ratio is within the second charging ratio range and that the period of no input by the user is longer than a certain period.

[0136] For example, controller 170 can reduce the brightness of display 180 from 100% to 80% in 5 steps by 4% (unit brightness) based on the determination that the battery charging ratio is in the second charging ratio range and that the period of no input by the user is more than a certain period of time.

[0137] The controller 170 can reduce the screen brightness by 4% for every certain percentage decrease in the battery's charging percentage. This certain percentage could be 0.5%, but this is just an example.

[0138] As the current duty cycle gradually decreases, the brightness of the display 180 can also gradually decrease.

[0139] When the battery saving mode is turned off, if the monitor's brightness suddenly decreases from 100% to 80% at one time, the user may perceive a sudden drop in brightness. This could cause inconvenience when viewing images.

[0140] However, according to an embodiment of the present invention, when the battery saving mode is deactivated, the brightness of the display 180 is gradually reduced from 100% to 80%, thereby mitigating the user's visual perception of the reduced brightness. Furthermore, the reduced brightness also saves battery power, thereby increasing the usage time of the display device 1.

[0141] In addition, when the battery power saving mode is deactivated when the battery charging ratio is in a second charging ratio range that is less than the first charging ratio range, the brightness of the display 180 can be further reduced.

[0142] On the other hand, the controller 170 can receive user input when the brightness of the display 180 is reduced to 80%. When increasing the brightness of the display 180 from 80% to 100%, the controller 170 can increase the brightness of the display 180 by 2% in 10 steps, increasing it to 20%.

[0143] The controller 170 can increase the screen brightness by 2% for every certain percentage decrease in the battery's charging percentage. This certain percentage could be 0.5%, but this is just an example.

[0144] When increasing brightness based on received user input, the increase rate of brightness can be smaller than the decrease rate, and more steps can be taken for brightness adjustment. This is to ensure a slow increase in brightness and prevent battery drain.

[0145] Figure 4 It is a graph showing the change in screen brightness when the display device switches from power mode to battery saving mode.

[0146] Before entering battery power saving mode, the screen brightness of display device 1 can be 100%.

[0147] When the power connection is disconnected (at time t1), the display device 1 can switch to battery saving mode. As a result, the brightness of the screen of the display 180 is reduced from 100% to 50%.

[0148] If the screen brightness decreases from 100% to 50%, the user may experience discomfort viewing the image due to the dim brightness. Consequently, the user may deactivate the battery saving mode of display device 1. With the battery saving mode deactivated (at time t2), the screen brightness may increase from 50% back to 100%. If the screen brightness were to switch directly from 50% to 100%, battery consumption might increase.

[0149] In an embodiment of the present invention, when the battery power saving mode is deactivated, the screen brightness is gradually reduced to a specific brightness to reduce battery power consumption while mitigating the user's visual brightness perception.

[0150] Figure 5 This diagram illustrates, according to an embodiment of the present invention, the process by which the screen brightness changes according to the battery charging ratio when the battery power saving mode is deactivated.

[0151] exist Figure 5 The process described below follows after the battery power saving mode of display device 1 is deactivated.

[0152] Before the T11 time point, the screen brightness was 100% with the battery saving mode turned off.

[0153] The display device 1 can gradually reduce the screen brightness to 88% at a time t11 when the battery charging rate is in the range of 50% to 90% and the period of no user input is more than 3 minutes.

[0154] Display device 1 can control display 180 to reduce the screen brightness to 88% in 3 steps, with each step decreasing by 4%.

[0155] After the screen brightness decreases to 88%, if user input occurs at time t12, the display device 1 can control the display 180 to increase the screen brightness by 2%.

[0156] The screen brightness can reach 100% with each 2% increase.

[0157] Subsequently, at time point t13, when the battery charge percentage is between 50% and 90% and 3 minutes have passed since the user stopped inputting data, display device 1 can reduce the screen brightness. Display device 1 can control display 180 to reduce the screen brightness by 4% in 3 steps to 88%.

[0158] Afterwards, when the battery charge ratio is in the range of 50% to 90% and no input has occurred, 10 minutes have passed from t12, the last time user input was generated, at time point t14, and the power mode of the display device 1 enters the atmosphere creation mode.

[0159] The ambient mode can be used to further reduce battery consumption compared to the battery saving mode. In ambient mode, a black image or a standby screen can be displayed on the monitor 180.

[0160] As the power mode of display device 1 enters the ambient lighting mode, the screen brightness can be further reduced from 88% to 50%.

[0161] Subsequently, at t15, which is the time point when user input is generated, the display device 1 can control the display 180 to increase the screen brightness from 50% to 100%. On the other hand, at t15, which is the time point when user input is generated, the battery charge percentage may be less than 50%.

[0162] Subsequently, at time point t16, when the battery charge percentage is less than 50% and 3 minutes have passed since time point t15 (when user input was generated), the display device 1 can gradually reduce the screen brightness to 80%.

[0163] Display device 1 can control display 180 to reduce the screen brightness from 4% to 80% in 5 steps. That is, compared to the case where the screen brightness is reduced by 4% in 3 steps at time point t11 ​​or t13, the screen brightness can be reduced by 4% in 5 steps.

[0164] This further reduces the battery's charging rate, thus reducing maximum brightness to minimize power consumption.

[0165] After the screen brightness decreases to 80%, if user input occurs at time t17, the display device 1 can control the display 180 to increase the screen brightness by 2%. The screen brightness can then reach 100% by increasing by 2%.

[0166] According to an embodiment of the present invention, when the battery power saving mode is deactivated, the brightness of the display 180 gradually decreases from 100% to 88%, thereby reducing the user's visual perception. Furthermore, even when the battery power saving mode is deactivated, the reduced brightness saves battery power, thereby increasing the usage time of the display device 1.

[0167] Furthermore, according to an embodiment of the present invention, when user input is applied, as the brightness of the display 180 gradually increases from 88% to 100%, the user's visual perception can be reduced. Additionally, the gradual increase in brightness saves battery power, thereby increasing the usage time of the display device 1.

[0168] Figure 6a This is a diagram illustrating the structure of a display device including a battery disposed on the head, according to an embodiment of the present invention. Figure 6b This is a diagram illustrating the structure of a display device including batteries respectively disposed on the head and the support, according to another embodiment of the present invention.

[0169] Reference Figure 6a ,and Figure 1b Compared to the previous structure, the display device 1 may also include a head battery 601. The head battery 601 may be installed on the back of the head 10.

[0170] The display device 1 can determine the charging ratio of the head battery 601 and the periods of no user input based on the user's input. Figure 3 and Figure 5 The embodiment describes controlling the brightness of the screen.

[0171] Reference Figure 6b ,and Figure 6a Compared to the previous structure, the display device 1 may also be provided with a support battery 603 disposed on the base 20.

[0172] The bracket battery 603 can be built into the base 20.

[0173] The display device 1 can determine the charging ratio of the head battery 601 and the bracket battery 603 based on the average ratio between the charging ratios of the head battery 601 and the periods of no user input. Figure 3 and Figure 5 The embodiment describes controlling the brightness of the screen.

[0174] That is, in Figure 3 and Figure 5 In one embodiment, the battery charging ratio can be the average ratio between the charging ratio of the head battery 601 and the charging ratio of the bracket battery 603.

[0175] If it is determined that the battery power saving mode has been deactivated, the controller 170 of the display device 1 can obtain the average ratio between the charging ratio of the head battery 601 and the charging ratio of the bracket battery 603, as well as the user-inputted non-input period.

[0176] If the average ratio is within the first charging ratio range and the period of no input by the user is a certain period or longer, the controller 170 can control the display 180 to gradually reduce the brightness by a first unit brightness until it is reduced to the first reference brightness.

[0177] If the average ratio is within a second charging ratio range that is less than the first charging ratio range and the period without input is a certain period of time or more, then the controller 170 can control the display 180 to gradually reduce the brightness by a second unit brightness until it is reduced to a second reference brightness that is less than the first reference brightness.

[0178] According to one embodiment of the present invention, the above-described method can be implemented as processor-readable code on a program recording medium. Examples of processor-readable media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

[0179] The display device described above is not limited to the configuration and method of the embodiments described above. The above embodiments can also be configured by selectively combining all or part of the various embodiments to enable various modifications.

Claims

1. A display device, wherein, include: Battery; monitor; Power terminal, receiving power from an external power source; as well as When the controller disconnects from the external power source, it determines whether the battery power saving mode has been deactivated. If the battery power saving mode has been deactivated and the period of no input by the user is longer than a certain period, the controller controls the display to gradually reduce the screen brightness according to the battery charging ratio.

2. The display device according to claim 1, wherein, If the battery charging ratio is within a first charging ratio range, the controller causes the screen brightness to gradually decrease by a first unit brightness to a first reference brightness. If the battery charging ratio is within the second charging ratio range, the controller causes the screen brightness to gradually decrease from the first unit brightness to the second reference brightness. The second charging ratio range is a range smaller than the first charging ratio range; The second reference brightness is less than the first reference brightness.

3. The display device according to claim 2, wherein, When the battery charging ratio decreases by a certain percentage, the controller causes the screen brightness to gradually decrease to the first reference brightness or the second reference brightness by the unit brightness.

4. The display device according to claim 2, wherein, If the battery charging ratio is within the first charging ratio range and the user input is received, the controller causes the screen brightness to gradually increase to the initial brightness in second unit brightness increments. If the battery charging ratio is within the second charging ratio range and the user input is received, the controller causes the screen brightness to gradually increase to the initial brightness in units of the second unit brightness. The second unit brightness is less than the first unit brightness.

5. The display device according to claim 1, wherein, The controller determines whether the battery saving mode has been deactivated based on touch input or signals received from a remote control device.

6. The display device according to claim 1, wherein, When the battery power saving mode is set to disabled, the controller determines that the battery power saving mode has been disabled when disconnecting from the external power source.

7. The display device according to claim 1, wherein, The display includes a liquid crystal display panel and a backlight unit; The controller gradually reduces the duty cycle of the pulse width modulation signal supplied to the backlight unit.

8. The display device according to claim 1, wherein, The display includes an organic light-emitting diode panel; The controller gradually reduces the current supplied to the organic light-emitting diode panel.

9. The display device according to claim 1, wherein, The battery consists of two components; The charging ratio of the battery is the average of the charging ratios of the two batteries.

10. The display device according to claim 1, wherein, The display device consists of a bracket and a head supported by the bracket; The head includes the battery, the display, and the controller; The bracket includes the power terminal, a base, a rod extending vertically from the base, a support arm extending in a direction intersecting the rod, and a rotary connector connecting the head and the support arm.

11. The display device according to claim 10, wherein, The head and the bracket are detachable.

12. The display device according to claim 10, wherein, The bracket also includes a bracket battery.

13. The display device according to claim 1, wherein, When the controller disconnects from the external power source, it causes the display device to enter the battery power saving mode.

14. The display device according to claim 1, wherein, If no power signal is detected from the power terminal, the controller determines that the connection with the external power source has been disconnected.

15. A method for operating a display device, wherein, The display device is equipped with a battery, a display, and a power terminal for receiving power from an external power source. The operation method of the display device includes: The step of determining whether the battery power saving mode has been deactivated when disconnecting from the external power source; and If the battery power saving mode has been deactivated and the period of no input by the user is longer than a certain period, then the step of controlling the display to gradually reduce the screen brightness according to the battery charging ratio is initiated.

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