WO2023238981A1

WO2023238981A1 - Display device and method for operating same

Info

Publication number: WO2023238981A1
Application number: PCT/KR2022/009058
Authority: WO
Inventors: 정덕용
Original assignee: 엘지전자 주식회사
Priority date: 2022-06-10
Filing date: 2022-06-24
Publication date: 2023-12-14
Also published as: KR20230170321A

Abstract

A display device according to an embodiment of the present invention comprises: a display for displaying an image; a controller for controlling the luminance of the image; a battery; and a power supply circuit which supplies external power or battery-charged power when the display device is driven, wherein the charging current of the battery may be varied on the basis of the luminance.

Description

Display device and method of operation thereof

This disclosure relates to a display device.

Digital TV services using wired or wireless communication networks are becoming popular. Digital TV services can provide a variety of services that cannot be provided by existing analog broadcasting services.

For example, IPTV (Internet Protocol Television), a type of digital TV service, and smart TV service provide interactivity that allows users to actively select the type of program to watch and the viewing time. IPTV and smart TV services can provide various additional services, such as Internet search, home shopping, and online games, based on this interactivity.

And, as TV services have become more diverse, the types of display devices have also become more diverse. For example, display devices that support portrait mode by rotating the display, that allow adjustment of the height or angle of the display, and that are easy to move are being released. Accordingly, there is an advantage in allowing users to watch from a desired location.

Meanwhile, these display devices are equipped with batteries to improve mobility, and the lifespan and capacity of the batteries are very important.

The present disclosure seeks to provide a display device that minimizes performance degradation of a battery disposed adjacent to a display.

The present disclosure seeks to provide a display device that manages the ambient temperature of the battery to a preset temperature while minimizing the charging time of the battery.

A display device according to an embodiment of the present invention includes a display that displays an image, a controller that controls the luminance of the image, a battery, and a power supply circuit that supplies external power or power charged to the battery when driving the display device, The charging current of the battery may vary based on luminance.

The controller can control the charging current to be lower as the brightness increases.

The controller outputs a PWM signal to control brightness to the display and can adjust the charging current according to the duty cycle of the PWM signal.

The controller controls the charging current to a first current when the duty cycle of the PWM signal falls within the first range, and controls the charging current to a second range lower than the first current when the duty cycle of the PWM signal falls within a second range higher than the first range. 2 Can be controlled by current.

The display device further includes a temperature sensor that detects the ambient temperature of the battery, and the controller can control brightness based on the ambient temperature detected by the temperature sensor.

The controller may control the display to display information on the time when battery charging is completed based on the charging current.

When operating in a battery-free mode, the controller can control the power supply circuit to supply only external power with the power used to drive the display device.

The controller may display a first icon when operating in a battery-free mode, and may display a second icon when not operating in a battery-free mode.

When the operation in the battery-free mode is terminated, the controller may display information on the improvement of battery life according to the operation time in the battery-free mode.

When operating in battery-free mode, the controller can adjust the ambient temperature of the battery to a preset charging temperature.

According to an embodiment of the present disclosure, the charging current of the battery is varied based on the brightness, and both the brightness and the charging current are high, thereby minimizing the problem of excessively high temperature around the battery, thereby eliminating the problem of performance deterioration due to overheating of the battery. can be minimized.

According to an embodiment of the present disclosure, by controlling the sum of the temperature due to brightness and the temperature due to battery charging within the allowable battery temperature, the problem of battery overheating is minimized and the time required for battery charging is minimized. there is.

Figure 1 shows a block diagram of the configuration of a display device according to an embodiment of the present invention.

Figure 2 is a block diagram of a remote control device according to an embodiment of the present invention.

Figure 3 shows an example of the actual configuration of a remote control device according to an embodiment of the present invention.

Figure 4 shows an example of utilizing a remote control device according to an embodiment of the present invention.

5A and 5B are diagrams for explaining the landscape mode and portrait mode of a stand-type display device according to an embodiment of the present disclosure.

FIG. 6 is a flowchart illustrating a method of operating a display device according to an embodiment of the present disclosure.

FIG. 7 is a flowchart illustrating a method by which a display device varies battery charging current according to an embodiment of the present disclosure.

FIG. 8 is a diagram showing the temperature when the display device operates in the method shown in FIG. 7.

Figure 9 is a diagram showing the temperature when the display device according to an embodiment of the present disclosure compensates the allowable temperature according to the surrounding environment.

FIG. 10 is a diagram showing the relationship between luminance and battery charging current in a display device according to an embodiment of the present disclosure.

FIG. 11 is a flowchart illustrating a method by which a display device varies battery charging current according to another embodiment of the present disclosure.

FIG. 12 is a diagram showing the relationship between luminance and battery charging current in a display device according to an embodiment of the present disclosure.

FIG. 13 is a flowchart illustrating a method by which a display device displays battery charging information according to an embodiment of the present disclosure.

FIG. 14 is a flowchart illustrating a method of operating a display device supporting a battery-free mode according to an embodiment of the present disclosure.

FIG. 15 is an example diagram illustrating screens displayed by a display device supporting a battery-free mode according to an embodiment of the present disclosure.

Hereinafter, embodiments related to the present invention will be described in more detail with reference to the drawings. The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of preparing the specification, and do not have distinct meanings or roles in themselves.

The display device according to an embodiment of the present invention is, for example, an intelligent display device that adds a computer support function to the broadcast reception function, and is faithful to the broadcast reception function while adding an Internet function, etc., such as a handwriting input device and a touch screen. Alternatively, it can be equipped with a more convenient interface such as a spatial remote control. In addition, by supporting wired or wireless Internet functions, it is possible to connect to the Internet and a computer and perform functions such as email, web browsing, banking, or gaming. A standardized general-purpose OS can be used for these various functions.

Accordingly, in the display device described in the present invention, for example, various applications can be freely added or deleted on a general-purpose OS kernel, so various user-friendly functions can be performed. More specifically, the display device may be, for example, a network TV, HBBTV, smart TV, LED TV, OLED TV, etc., and in some cases, may also be applied to a smartphone.

Referring to FIG. 1, the display device 100 includes 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, and a display. It may include (180), a speaker (185), and a power supply circuit (190).

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

The tuner 131 can select a specific broadcast channel according to a channel selection command. The tuner 131 may receive a broadcast signal for a specific selected broadcast channel.

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 to a form that can be output.

The external device interface 135 may receive an application or application list within an adjacent external device and transfer it to the controller 170 or memory 140.

The external device interface 135 may provide a connection path between the display device 100 and an external device. The external device interface 135 may receive one or more of video and audio output from an external device connected wirelessly or wired to the display device 100 and transmit it to the controller 170. 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 High Definition Multimedia Interface (HDMI) terminals, and a component terminal.

An image signal from an external device input through the external device interface 135 may be output through the display 180. A voice signal from an external device input through the external device interface 135 may be output through the speaker 185.

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

The network interface 133 may provide an interface for connecting the display device 100 to a wired/wireless network including an Internet network. The network interface 133 may transmit or receive data with other users or other electronic devices through a connected network or another network linked to the connected network.

Additionally, some of the content data stored in the display device 100 may be transmitted to a selected user or selected electronic device among other users or other electronic devices pre-registered in the display device 100.

The network interface 133 can access a certain web page through a connected network or another network linked to the connected network. In other words, you can access a certain web page through a network and transmit or receive data with the corresponding server.

And, the network interface 133 can receive content or data provided by a content provider or network operator. That is, the network interface 133 can receive content and information related thereto, such as movies, advertisements, games, VODs, and broadcast signals, provided from a content provider or network provider through a network.

Additionally, the network interface 133 can receive firmware update information and update files provided by a network operator, and can transmit data to the Internet, a content provider, or a network operator.

The network interface 133 can select and receive a desired application from among applications open to the public through a network.

The memory 140 stores programs for processing and controlling each signal in the controller 170, and can store signal-processed video, voice, or data signals.

In addition, the memory 140 may perform a function for temporary storage of video, voice, or data signals input from the external device interface 135 or the network interface 133, and may store information about a predetermined image through a channel memory function. You can also store information.

The memory 140 may store an application or application list input from the external device interface 135 or the network interface 133.

The display device 100 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.

The user input interface 150 may 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 be used remotely according to various communication methods such as Bluetooth, Ultra Wideband (WB), ZigBee, Radio Frequency (RF) communication, or infrared (IR) communication. Control signals such as power on/off, channel selection, and screen settings can be received and processed from the control device 200, or control signals from the controller 170 can be processed to be transmitted to the remote control device 200.

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

The video signal processed by the controller 170 may be input to the display 180 and displayed as an image corresponding to the video signal. Additionally, the image signal processed by the controller 170 may be input to an external output device through the external device interface 135.

The voice signal processed by the controller 170 may be output as audio to the speaker 185. Additionally, the voice signal processed by the controller 170 may be input to an external output device through the external device interface 135.

In addition, the controller 170 may control overall operations within the display device 100.

In addition, the controller 170 can control the display device 100 by a user command or internal program input through the user input interface 150, and connects to the network to display the application or application list desired by the user on the display device ( 100) You can make it available for download.

The controller 170 allows channel information selected by the user to be output through the display 180 or speaker 185 along with the processed video or audio signal.

In addition, the controller 170 controls video signals from an external device, for example, a camera or camcorder, input through the external device interface 135, according to an external device video playback command received through the user input interface 150. Alternatively, the voice signal can be output through the display 180 or speaker 185.

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

In addition, the controller 170 can control the playback of content stored in the display device 100, received broadcast content, or external input content, which includes broadcast video, external input video, and audio files. , can be in various forms such as still images, connected web screens, and document files.

The wireless communication interface 173 can communicate with external devices through wired or wireless communication. The wireless communication interface 173 can perform short range communication with an external device. For this purpose, the wireless communication interface 173 includes Bluetooth™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), and Wi-Fi. Short-distance communication can be supported using at least one of Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technologies. This wireless communication interface 173 is between the display device 100 and a wireless communication system, between the display device 100 and another display device 100, or between the display device 100 through wireless area networks. It can support wireless communication between the network and the display device 100 (or external server). Local area wireless networks may be wireless personal area networks.

Here, the other display device 100 is a wearable device capable of exchanging data with (or interoperating with) the display device 100 according to the present invention, for example, a smartwatch, smart glasses. It can be a mobile terminal such as (smart glass), HMD (head mounted display), or smart phone. The wireless communication interface 173 may detect (or recognize) a wearable device capable of communication around the display device 100 .

Furthermore, if the detected wearable device is a device authenticated to communicate with the display device 100 according to the present invention, the controller 170 sends at least a portion of the data processed by the display device 100 to the wireless communication interface 173. It can be transmitted to a wearable device through . Accordingly, a user of a wearable device can use data processed by the display device 100 through the wearable device.

The display 180 converts the video signal, data signal, and OSD signal processed by the controller 170 or the video signal and data signal received from the external device interface 135 into R, G, and B signals, respectively, and provides a driving signal. can be created.

Meanwhile, the display device 100 shown in FIG. 1 is only one embodiment of the present invention. Some of the illustrated components may be integrated, added, or omitted depending on the specifications of the display device 100 that is actually implemented.

That is, as needed, two or more components may be combined into one component, or one component may be subdivided into two or more components. In addition, the functions performed by each block are for explaining embodiments of the present invention, and the specific operations or devices do not limit the scope of the present invention.

According to another embodiment of the present invention, unlike shown in FIG. 1, the display device 100 does not have a tuner 131 and a demodulator 132 but has a network interface 133 or an external device interface 135. You can also receive and play video through the device.

For example, the display device 100 is divided into an image processing device such as a set-top box for receiving broadcast signals or contents according to various network services, and a content playback device for playing content input from the image processing device. It can be implemented.

In this case, the method of operating a display device according to an embodiment of the present invention, which will be described below, includes not only the display device 100 as described with reference to FIG. 1, but also an image processing device such as the separated set-top box or the display 180. ) and a content playback device having an audio output unit 185.

Next, with reference to FIGS. 2 and 3, a remote control device according to an embodiment of the present invention will be described.

Figure 2 is a block diagram of a remote control device according to an embodiment of the present invention, and Figure 3 shows an example of the actual configuration of the remote control device 200 according to an embodiment of the present invention.

First, referring to FIG. 2, the remote control device 200 includes a fingerprint reader 210, a wireless communication circuit 220, a user input interface 230, a sensor 240, an output interface 250, and a power supply circuit ( 260), memory 270, controller 280, and microphone 290.

Referring to FIG. 2, the wireless communication circuit 220 transmits and receives signals to and from any one of the display devices according to the embodiments of the present invention described above.

The remote control device 200 has an RF circuit 221 capable of transmitting and receiving signals to and from the display device 100 in accordance with RF communication standards, and is capable of transmitting and receiving signals to and from the display device 100 in accordance with IR communication standards. An IR circuit 223 may be provided. Additionally, the remote control device 200 may be provided with a Bluetooth circuit 225 capable of transmitting and receiving signals to and from the display device 100 according to the Bluetooth communication standard. In addition, the remote control device 200 is provided with an NFC circuit 227 capable of transmitting and receiving signals with the display device 100 according to the NFC (Near Field Communication) communication standard, and displays the display device 100 according to the WLAN (Wireless LAN) communication standard. A WLAN circuit 229 capable of transmitting and receiving signals to and from the device 100 may be provided.

In addition, the remote control device 200 transmits a signal containing information about the movement of the remote control device 200 to the display device 100 through the wireless communication circuit 220.

Meanwhile, the remote control device 200 can receive signals transmitted by the display device 100 through the RF circuit 221 and, if necessary, turn on/off the display device 100 through the IR circuit 223. Commands for turning off, changing channels, changing volume, etc. can be sent.

The user input interface 230 may be comprised of a keypad, button, touch pad, or touch screen. The user can input commands related to the display device 100 into the remote control device 200 by manipulating the user input interface 230. If the user input interface 230 has a hard key button, the user can input a command related to the display device 100 to the remote control device 200 through a push operation of the hard key button. This will be explained with reference to FIG. 3 .

Referring to FIG. 3, the remote control device 200 may include a plurality of buttons. The plurality of buttons include a fingerprint recognition button (212), power button (231), home button (232), live button (233), external input button (234), volume control button (235), voice recognition button (236), It may include a channel change button 237, a confirmation button 238, and a back button 239.

The fingerprint recognition button 212 may be a button for recognizing the user's fingerprint. In one embodiment, the fingerprint recognition button 212 is capable of a push operation and may receive a push operation and a fingerprint recognition operation.

The power button 231 may be a button for turning on/off the power of the display device 100.

The home button 232 may be a button for moving to the home screen of the display device 100.

The live button 233 may be a button for displaying a real-time broadcast program.

The external input button 234 may be a button for receiving an external input connected to the display device 100.

The volume control button 235 may be a button for adjusting the volume of the sound output by the display device 100.

The voice recognition button 236 may be a button for receiving the user's voice and recognizing the received voice.

The channel change button 237 may be a button for receiving a broadcast signal of a specific broadcast channel.

The confirmation button 238 may be a button for selecting a specific function, and the back button 239 may be a button for returning to the previous screen.

Figure 2 will be described again.

If the user input interface 230 has a touch screen, the user can input commands related to the display device 100 through the remote control device 200 by touching a soft key on the touch screen. Additionally, the user input interface 230 may be provided with various types of input means that the user can operate, such as scroll keys and jog keys, and this embodiment does not limit the scope of the present invention.

The sensor 240 may include a gyro sensor 241 or an acceleration sensor 243, and the gyro sensor 241 may sense information about the movement of the remote control device 200.

For example, the gyro sensor 241 can sense information about the operation of the remote control device 200 based on the x, y, and z axes, and the acceleration sensor 243 measures the moving speed of the remote control device 200. Information about such things can be sensed. Meanwhile, the remote control device 200 may further include a distance measurement sensor and can sense the distance from the display 180 of the display device 100.

The output interface 250 may output a video or audio signal corresponding to a manipulation of the user input interface 230 or a signal transmitted from the display device 100.

The user can recognize whether the output interface 250 is manipulating the user input interface 230 or controlling the display device 100.

For example, the output interface 250 includes an LED 251 that turns on when the user input interface 230 is manipulated or a signal is transmitted and received with the display device 100 through the wireless communication unit 225, and a vibrator 253 that generates vibration. ), a speaker 255 that outputs sound, or a display 257 that outputs an image.

In addition, the power supply circuit 260 supplies power to the remote control device 200, and stops power supply when the remote control device 200 does not move for a predetermined period of time, thereby reducing power waste.

The power supply circuit 260 can resume power supply when a predetermined key provided in the remote control device 200 is operated.

The memory 270 may store various types of programs, application data, etc. necessary for controlling or operating the remote control device 200.

When the remote control device 200 transmits and receives signals wirelessly through the display device 100 and the RF circuit 221, the remote control device 200 and the display device 100 transmit and receive signals through a predetermined frequency band. .

The controller 280 of the remote control device 200 stores and references information about the display device 100 paired with the remote control device 200 and the frequency band capable of wirelessly transmitting and receiving signals in the memory 270. You can.

The controller 280 controls all matters related to the control of the remote control device 200. The controller 280 sends a signal corresponding to a predetermined key operation of the user input interface 230 or a signal corresponding to the movement of the remote control device 200 sensed by the sensor 240 through the wireless communication unit 225. 100).

Additionally, the microphone 290 of the remote control device 200 can acquire voice.

There may be a plurality of microphones 290.

Next, Figure 4 will be described.

(a) of FIG. 4 illustrates that a pointer 205 corresponding to the remote control device 200 is displayed on the display 180.

The user can move or rotate the remote control device 200 up and down, left and right. The pointer 205 displayed on the display 180 of the display device 100 corresponds to the movement of the remote control device 200. This remote control device 200 can be called a spatial remote control because the corresponding pointer 205 is moved and displayed according to movement in 3D space, as shown in the drawing.

(b) of FIG. 4 illustrates that when the user moves the remote control device 200 to the left, the pointer 205 displayed on the display 180 of the display device 100 also moves to the left correspondingly.

Information about the movement of the remote control device 200 detected through the sensor of the remote control device 200 is transmitted to the display device 100. The display device 100 may calculate the coordinates of the pointer 205 from information about the movement of the remote control device 200. The display device 100 may display the pointer 205 to correspond to the calculated coordinates.

(c) of FIG. 4 illustrates a case where a user moves the remote control device 200 away from the display 180 while pressing a specific button in the remote control device 200. As a result, the selected area in the display 180 corresponding to the pointer 205 can be zoomed in and displayed enlarged.

Conversely, when the user moves the remote control device 200 closer to the display 180, the selected area in the display 180 corresponding to the pointer 205 may be zoomed out and displayed in a reduced size.

Meanwhile, when the remote control device 200 moves away from the display 180, the selected area may be zoomed out, and when the remote control device 200 approaches the display 180, the selected area may be zoomed in.

Additionally, when a specific button in the remote control device 200 is pressed, recognition of up-down, left-right movement may be excluded. That is, when the remote control device 200 moves away from or approaches the display 180, up, down, left, and right movements may not be recognized, and only forward and backward movements may be recognized. When a specific button in the remote control device 200 is not pressed, only the pointer 205 moves as the remote control device 200 moves up, down, left, and right.

Meanwhile, the moving speed or direction of the pointer 205 may correspond to the moving speed or direction of the remote control device 200.

Meanwhile, a pointer in this specification refers to an object displayed on the display 180 in response to the operation of the remote control device 200. Accordingly, the pointer 205 can be an object of various shapes other than the arrow shape shown in the drawing. For example, concepts may include dots, cursors, prompts, thick outlines, etc. In addition, the pointer 205 can be displayed not only in response to one of the horizontal and vertical axes on the display 180, but also in response to multiple points, such as a line or surface. .

Referring to FIGS. 5A and 5B, a stand type display device 100 is shown.

A shaft 103 and a stand base 105 may be connected to the display device 100.

The shaft 103 may connect the display device 100 and the stand base 105. Shaft 103 may extend vertically.

The lower end of the shaft 103 may be connected to the edge of the stand base 105.

The lower end of the shaft 103 may be rotatably connected to the circumference of the stand base 105.

The display device 100 and the shaft 103 may rotate about a vertical axis with respect to the stand base 105.

The upper part of the shaft 103 may be connected to the rear of the display device 100.

The stand base 105 may serve to support the display device 100.

The display device 100 may be configured to include a shaft 103 and a stand base 105.

The display device 100 can rotate around a point where the top of the shaft 103 and the rear of the display 180 come into contact.

FIG. 5A shows that the display 180 operates in landscape mode with an attitude in which the horizontal length is greater than the vertical length, and FIG. 5b shows that the display 180 operates in landscape mode with an attitude in which the vertical length is greater than the horizontal length. It can be expressed.

Users can move around holding a stand-type display device. In other words, unlike fixed devices, stand-type display devices have improved mobility, so users are not restricted by placement location.

Additionally, the stand-type display device with improved mobility may further include a battery 192 (see FIG. 6). A stand-type display device that includes a battery can operate by receiving power charged in the battery even when not connected to an outlet, so the movement radius can be expanded.

A battery may be provided inside the display device 100. However, depending on the embodiment, the battery may be provided on the shaft 103 or the stand base 105. In this disclosure, it is assumed that a battery is provided inside the display device 100.

Figure 6 is an example diagram for explaining the location of a battery provided in a stand-type display device according to an embodiment of the present disclosure.

FIG. 6 may be a horizontal cross-sectional view of the display device 100 shown in FIG. 5B.

As shown in FIG. 6, a display 180 may be provided at the front of the display device 100, and a battery 192 and a printed circuit board (PCB) may be provided at the rear of the display 180. there is. The PCB may be a board on which at least one configuration described in FIG. 1, such as the controller 170 or the power supply circuit 190, is integrated.

The battery 192 can convert chemical energy into electricity and store it to supply power required to drive the display device 100. The battery 192 is charged while the display device 100 is connected to an external power source (e.g., an outlet), and is discharged when the display device 100 is operated without being connected to an external power source. It can supply the energy needed for movement.

Meanwhile, the lifespan and capacity of the battery 192 are generally affected by temperature.

First, lifespan may refer to the maximum amount of charge that can be charged to the battery 192. The maximum charge of the battery 192 may decrease over time or as charging/discharging is repeated. And, this decrease in lifespan may vary depending on temperature. For example, the battery 192 has a lifespan of 94% when left at 0 degrees for one year, 80% when left at 25 degrees for one year, and 65% when left at 40 degrees for one year. It can be. In other words, the lifespan of the battery 192 tends to deteriorate faster as it is managed in a high-temperature environment.

Capacity may refer to the usable time when the battery 192 is fully charged. For example, the battery 192 may have the highest capacity at 25 degrees, and if the capacity is 100% at 25 degrees, the capacity is 95% at 45 degrees, the capacity is 85% at 0 degrees, and the capacity is 85% at -10 degrees. It could be 70%. That is, the battery 192 has maximum capacity at room temperature, and the capacity tends to decrease as the temperature decreases.

Due to the characteristics of the battery 192 described above, it may be desirable for the battery 192 to be managed at about 0 to 50 degrees when charging and about -20 to 60 degrees when discharging. That is, the controller 170 can set the charging temperature range of the battery 192 from 0 to 50 degrees and the discharging temperature range (or the portable use temperature range of the display device 100) from -20 to 60 degrees.

Meanwhile, when the battery 192 is charged/discharged, its temperature may increase due to the charge/discharge. For example, a battery 192 at 25 degrees may rise to about 29.5 degrees when charged at 2.36 A, rise to about 28.8 degrees when charged at 1.8 A, and rise to about 29.9 degrees when discharged by use. there is. As another example, a battery 192 at 40 degrees may rise to about 44.5 degrees when charged at 2.36A, rise to about 43.8 degrees when charged at 1.8A, and rise to about 44.9 degrees when discharged by use. .

In terms of reliability, it is desirable to manage the temperature of the battery 192 with a predetermined difference, that is, a margin, compared to the charge/discharge temperature range. However, when the battery 192 at 40 degrees is charged at 2.36A, the temperature rises to about 44.5 degrees, and the difference from the maximum charging temperature of 50 degrees is small, so there is a problem of reduced reliability. Due to this problem, when the battery 192 is charged at 1.8A, the charging time becomes longer.

Therefore, according to an embodiment of the present disclosure, the display device 100 changes the charging current of the battery 192 to improve reliability and minimize charging time.

The controller 170 may obtain the luminance (S11) and adjust the charging current based on the luminance (S13).

Specifically, the display 180 displays an image, and the controller 170 can control the brightness of the image displayed on the display 180. The controller 170 may control the brightness of the image by receiving a command to adjust the brightness through the user input interface 150. Alternatively, the controller 170 may control the brightness of the image based on the surrounding brightness detected through an illuminance sensor (not shown). Additionally, the controller 170 can control the brightness of the image for various reasons.

Meanwhile, the power supply circuit 190 may supply external power or power charged to the battery 192 when the display device 100 is driven. That is, the power supply circuit 190 can supply external power or power charged in the battery 192 to each component of the display device 100 when the display device 100 operates. The power supply circuit 190 may be connected to an outlet through an adapter to supply external power, or may supply charged power to the battery 192.

Additionally, the battery 192 can be charged when the display device 100 receives external power, and in this case, the charging current of the battery 192 can vary based on the brightness of the image.

In particular, the controller 170 can control the charging current to be lower as the brightness of the image increases. For example, the controller 170 may classify the luminance of the image and the charging current of the battery 192 into three levels (weak, medium, high), but the number of levels at this time is only illustrative. It is reasonable to say that it is not limited. The controller 170 may adjust the charging current to high when the luminance of the image is low, adjust the charging current to medium when the luminance of the image is medium, and adjust the charging current to low when the luminance of the image is high.

At this time, the controller 170 may determine the brightness of the image based on a brightness value set according to a user command, or may judge it based on a PWM signal output to the display 180 to control the brightness.

Specifically, the controller 170 may output a PWM signal with a higher duty cycle as the luminance increases to the display 180. Accordingly, the controller 170 can adjust the charging current according to the duty cycle of the PWM signal. For example, the controller 170 controls the charging current to the first current when the duty cycle of the PWM signal falls within the first range (e.g., 0 to 50%), and the duty cycle of the PWM signal falls within the first range. If it is in a higher second range (e.g., 50 to 75%), the charging current is controlled to a second current that is lower than the first current, and the duty cycle of the PWM signal is in a third range (e.g., higher than the second range). For example, if it falls within the range (75 to 100%), the charging current can be controlled to a third current that is lower than the second current.

As described above, the controller 170 can adjust the charging current charged to the battery 192 based on the luminance of the image, and accordingly manage the temperature of the battery 192 according to the charging temperature range. That is, the controller 170 can control the temperature of the battery 192 to an allowable temperature by adjusting the charging current charged to the battery 192 based on the luminance of the image. At this time, the allowable temperature may be a temperature corresponding to the maximum value of the charging temperature range described above.

In FIG. 8, A may represent the temperature due to the luminance of the image. As described above, the brightness of the image can be set by user settings or an illuminance sensor (not shown).

In FIG. 8, B represents the temperature resulting from the charging current of the battery 192, and C may be the allowable temperature of the battery 192. The charging current of the battery 192 is determined according to luminance and may be B=C-A.

Specifically, the controller 170 may calculate the temperature due to charging current and the temperature due to luminance. Accordingly, the controller 170 may determine the charging current of the battery 192 such that the temperature due to the charging current of the battery 192 is a value obtained by subtracting the temperature due to luminance from the allowable temperature of the battery 192.

That is, by adjusting the charging current of the battery 192 in real time according to the change in brightness of the battery 192, the temperature of the battery 192 is managed so as not to exceed the allowable temperature, thereby improving reliability and minimizing charging time and lifespan. It has the advantage of preventing deterioration.

Meanwhile, according to another embodiment of the present disclosure, by compensating the allowable temperature according to the surrounding environment of the display device 100, the problem of the battery 192 temperature exceeding the allowable temperature due to the surrounding environment can be minimized.

Each of A, B, and C in FIG. 9 is the same as described in FIG. 8, but the difference is that C is compensated by the ambient temperature (T). Below, the explanation will focus on the differences.

When the controller 170 obtains the ambient temperature (T), it can compensate for the allowable temperature C. For example, the controller 170 may correct the allowable temperature C to a preset allowable temperature, that is, a value obtained by subtracting the compensation coefficient (C') from the temperature corresponding to the maximum value of the charging temperature section. The controller 170 may obtain the compensation coefficient (C') based on the ambient temperature (T). For example, the controller 170 obtains the compensation coefficient (C') as a first value (e.g., 0) when the ambient temperature (T) is in a first temperature range (e.g., 15 to 25 degrees). And, if the ambient temperature (T) is a second temperature range (e.g., 25 to 40 degrees) higher than the first temperature range, the compensation coefficient (C') is set to a second value (e.g., 15), and if the ambient temperature (T) is a third temperature range (e.g., 0 to 15 degrees) lower than the second temperature range, the compensation coefficient (C') is set to a third value (C') smaller than the first value. For example, it can be obtained with -10).

The controller 170 corrects the allowable temperature (C) based on the ambient temperature (T), and thus the charging current (B) of the battery 192 determined by C-A may also be changed.

Meanwhile, the controller 170 can obtain the ambient temperature (T) in various ways.

As an example, the controller 170 may obtain the ambient temperature (T) upon receiving a user input command.

As another example, the controller 170 may acquire the ambient temperature (T) based on regional information set when the display device 100 is released. That is, the controller 170 determines that the ambient temperature (T) falls within the first temperature range when the region information is the first region, and determines that the ambient temperature (T) falls within the second temperature range when the region information represents the second region. It can be judged as belonging.

As another example, the controller 170 may obtain the ambient temperature (T) based on an ambient temperature sensor (not shown) provided in the display device 100.

*Figure 10 is a diagram showing the relationship between luminance and battery charging current in a display device according to an embodiment of the present disclosure.

In Figure 10, the horizontal axis represents time, and the vertical axis represents luminance and the magnitude of charging current. The numbers on the vertical axis are conversions of luminance and charging current into percentages, and do not correspond to absolute values.

FIG. 10(a) shows a case where the battery charging current is fixed regardless of luminance, and FIG. 10(b) shows a case where the battery charging current varies based on luminance.

As shown in (a) of FIG. 10, when the battery charging current is fixed, the battery charging current may be constant even if the luminance increases. The battery charging current may gradually change to 0 at the point when charging of the battery 192 is completed (a point corresponding to approximately 86 on the horizontal axis).

Meanwhile, as shown in Figure 10 (b), when the luminance increases, the battery charging current decreases, when the luminance decreases, the battery charging current increases, and when the luminance is constant, the battery charging current is also constant, The battery charging current may gradually change to 0 at the point when charging of the battery 192 is completed (a point corresponding to approximately 92 on the horizontal axis).

Meanwhile, according to another embodiment of the present disclosure, the display device 100 may adjust the battery charging current based on the ambient temperature of the battery 192.

The controller 170 may detect the temperature around the battery (S21) and adjust the charging current based on the temperature around the battery (S23).

The display device 100 may further include a temperature sensor (not shown) that detects the ambient temperature of the battery 192. A temperature sensor (not shown) may be placed adjacent to the battery 192, but the location of the battery 192 may vary.

The controller 170 may control the brightness of the image based on the ambient temperature detected by a temperature sensor (not shown).

Specifically, the ambient temperature of the battery 192 may be affected by brightness, load of the controller 170, operation of a cooling device (not shown), operation of a heating device (not shown), etc. For example, when the luminance is high, the load on the controller 170 is large, the cooling device (not shown) is not operated, or the heating device (not shown) is operated, the ambient temperature of the battery 192 may increase. You can. Conversely, when the luminance is low, the load on the controller 170 is small, the cooling device (not shown) is driven, or the heating device (not shown) is not driven, the ambient temperature of the battery 192 may decrease. . Here, the cooling device (not shown) and the heating device (not shown) may be configured to manage the ambient temperature of the battery 192 or the controller 170.

Accordingly, the controller 170 obtains the ambient temperature of the battery 192 through a temperature sensor (not shown) and adjusts the charging current of the battery 192 so that the ambient temperature of the battery 192 falls within the charge/discharge temperature range. It can be adjusted.

Meanwhile, depending on the embodiment, the controller 170 controls the brightness, controller 170, cooling device (not shown), and heating device (not shown) based on the ambient temperature of the battery 192 detected through a temperature sensor (not shown). At least one of the following (not shown) may be controlled. That is, the controller 170 lowers the luminance as the ambient temperature of the battery 192 increases, reduces the load on the controller 170, or operates a cooling device (not shown) to lower the ambient temperature of the battery 192. It can be lowered. Conversely, the controller 170 adjusts the luminance to be higher as the ambient temperature of the battery 192 becomes lower, increases the load of the controller 170, or operates a heating device (not shown) to increase the ambient temperature of the battery 192. It can be raised.

And, according to another embodiment of the present disclosure, the display device 100 may adjust the battery charging current based on the luminance and the ambient temperature of the battery 192. Although not shown in a separate drawing, the display device 100 may operate according to a flowchart that combines the flowchart shown in FIG. 7 and the flowchart shown in FIG. 11. Specifically, the controller 170 may obtain each of the brightness and the ambient temperature of the battery 192 and adjust the charging current based on both the brightness and the ambient temperature of the battery 192. The controller 170 can adjust the charging current to be inversely proportional to the luminance and at the same time adjust the charging current to be inversely proportional to the ambient temperature of the battery 192.

In FIG. 12, the horizontal axis represents time, and the vertical axis represents brightness, battery ambient temperature, and magnitude of charging current. The numbers on the vertical axis are conversions of luminance, battery ambient temperature, and charging current into percentages, and do not correspond to absolute values.

FIG. 12(a) shows a case where the battery charging current is varied based on the battery surrounding temperature regardless of luminance, and FIG. 12(b) shows a case where the battery charging current is varied based on luminance.

As shown in (a) of FIG. 12, the battery charging current can be fixed when the luminance changes. However, when the temperature around the battery increases due to an increase in brightness, etc. (indicated by a circle), the battery charging current is reduced, and when the temperature around the battery decreases, the battery charging current can be controlled to increase again.

As shown in (b) of FIG. 12, when luminance increases, battery charging current may decrease, and thus the temperature surrounding the battery may be maintained. That is, by reducing the battery charging current when luminance increases, an increase in the temperature around the battery can be prevented in advance.

Meanwhile, according to an embodiment of the present disclosure, the display device 100 may display battery charging information when adjusting the charging current of the battery 192 based on luminance.

The controller 170 may obtain the luminance of the image (S31) and adjust the charging current based on the luminance (S33). Since steps S31 and S33 described above are the same as those described in FIG. 7, overlapping descriptions will be omitted.

The controller 170 may control the display 180 to display information on the time when charging of the battery 192 is completed based on the charging current (S35).

Specifically, when the charging current is adjusted, the controller 170 calculates the time remaining until charging is completed when charging the battery 192 with the adjusted charging current, and displays the display 180 to display the calculated time. ) can be controlled.

The battery 192 may include a battery management system (BMS), and the controller 170 may calculate the time at which charging of the battery 192 is completed through the BMS.

For example, the display 180 may display information on the time when charging of the battery 192 is completed, such as “There are 60 minutes remaining until the battery is fully charged.”

Additionally, the controller 170 may control the display 180 to further display information on how to induce fast charging along with information on the time when charging of the battery 192 is completed. For example, display 180 might say “There are 60 minutes left until the battery is fully charged. Information on the time when charging of the battery 192 is completed and information on how to induce fast charging, such as “When the power is turned off, the time required to fully charge the battery is shortened by 30 minutes,” can be displayed.

Additionally, the display device 100 according to an embodiment of the present disclosure may support a battery-free mode.

The controller 170 may obtain the luminance (S41) and adjust the charging current based on the luminance (S43). Since the above-mentioned steps S41 and S43 are the same as those described in FIG. 7, overlapping descriptions will be omitted.

The controller 170 may determine whether a command to operate in a battery-free mode has been received (S45).

The battery non-use mode refers to an operation mode that intentionally blocks the use of the battery 192, and may be supported for purposes such as extending the life of the battery 192.

The display 180 may display a screen for selecting whether to operate in a battery-free mode. The controller 170 may receive a user input for selecting whether to operate in a battery-free mode through the user input interface 150.

When the controller 170 receives an operation command for the battery-free mode, it can operate in the battery-free mode (S47).

The controller 170 may control the power supply circuit 190 to supply only external power as power used to drive the display device 100 when operating in a battery-free mode.

The controller 170 may turn off the power of the battery 192 when entering the battery non-use mode. Since the battery 192 is turned off, the display device 100 can operate only when connected to an outlet, and if it is not connected to an outlet, the display device 100 itself may be turned off.

Additionally, the controller 170 can control the surrounding temperature of the battery 192 to a preset charging temperature when operating in a battery-free mode. For example, while operating in a battery-free mode, the troller 170 may operate a cooling device (not shown) to cool and maintain the ambient temperature of the battery 192 at a preset charging temperature.

Additionally, when entering the battery-free mode, the controller 170 may display an icon indicating that it is operating in the battery-free mode. This will be explained in detail in FIG. 15.

When operating in the battery-free mode, the controller 170 may determine whether a command to end the battery-free mode has been received (S48).

When the controller 170 receives a command to end the battery unused mode, it can display information on improving battery life (S49).

When ending the battery unused mode, the controller 170 may display information on the improvement of battery life according to the operation time in the battery unused mode. The longer the operating time in battery-free mode, the longer the battery life can be improved. Accordingly, the controller 170 may calculate the improved battery life based on the battery unused mode maintenance time and control the display 180 to display improved battery life information.

Additionally, the controller 170 may calculate the battery life based on the ambient temperature and the battery unused mode maintenance time and control the display 180 to display information on improving battery life. A method of displaying battery life improvement information will be described with reference to FIG. 15.

Figure 15(a) may be an example of a screen displayed by the display 180 when operating in battery use mode. The display 180 may display a screen including a battery icon as shown in (a) of FIG. 15 while operating in the battery use mode. The battery icon may include at least one of a battery image and remaining amount.

Figure 15(b) may be an example of a screen displayed by the display 180 when operating in a battery-free mode. The display 180 may display a screen including an outlet icon as shown in (b) of FIG. 15 while operating in a battery-free mode. The outlet icon may include an outlet image.

That is, the controller 170 displays a first icon (e.g., an outlet icon) when operating in a battery-free mode, and displays a second icon (e.g., a battery icon) when not operating in a battery-free mode. The display 180 can be controlled to do so. The controller 170 can change the icon displayed on the screen depending on whether the operation is in a battery-free mode.

(c) of FIG. 15 may be an example of a screen on which the display 180 displays battery life improvement information. The display 180 may display improvement information on battery life calculated based on the operation time in the battery-free mode. For example, the display 180 may display a screen including a message indicating improved battery life, such as “Battery life has been improved by 30 days,” as shown in (c) of FIG. 15.

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

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

Claims

In the display device,

A display that displays images;

a controller that controls the brightness of the image;

battery; and

A power supply circuit that supplies external power or power charged to the battery when driving the display device,

The charging current of the battery is variable based on the brightness.

Display device.
In claim 1,

The controller is

The higher the luminance, the lower the charging current is controlled.

Display device.
In claim 1,

The controller is

Outputting a PWM signal for controlling the brightness to the display,

Adjusting the charging current according to the duty cycle of the PWM signal

Display device.
In claim 3,

The controller is

Controlling the charging current to a first current when the duty cycle of the PWM signal falls within a first range,

Controlling the charging current to a second current lower than the first current when the duty cycle of the PWM signal is in a second range higher than the first range.

Display device.
In claim 1,

Further comprising a temperature sensor that detects the ambient temperature of the battery,

The controller is

Controlling the brightness based on the ambient temperature detected by the temperature sensor

Display device.
In claim 1,

The controller is

Controlling the display to display information on the time when charging of the battery is completed based on the charging current

Display device.
In claim 1,

The controller is

Controlling the power supply circuit to supply only the external power with the power used to drive the display device when operating in a battery-free mode

Display device.
In claim 7,

The controller is

When operating in the battery-free mode, a first icon is displayed,

Displaying a second icon when not operating in the battery free mode

Display device.
In claim 7,

The controller is

When the operation in the battery-free mode is terminated, information on improving battery life according to the operation time in the battery-free mode is displayed.

Display device.
In claim 7,

The controller is

When operating in the battery unused mode, the ambient temperature of the battery is adjusted to a preset charging temperature.

Display device.
In claim 1,

The controller is

Determining the charging current of the battery so that the temperature due to the charging current of the battery is a value obtained by subtracting the temperature due to the brightness from the allowable temperature of the battery.

Display device.
In claim 11,

The controller is

Compensating the allowable temperature based on the ambient temperature

Display device.
In claim 12,

The controller is

Obtaining a compensation coefficient to compensate for the allowable temperature based on the ambient temperature

Display device.
In claim 12,

The controller is

Obtaining the ambient temperature based on local information

Display device.
In claim 1,

The battery is placed on the back of the display

Display device.