DISPLAY DEVICE AND OPERATING PROCEDURES FOR IT

Abstract

A display device and a method for operating it are provided. The display device includes: a power supply configured to generate power from an external power source to be supplied to the display device; an input interface configured to receive a power-on command or a power-off command for the display device; a main module configured to operate on a supply voltage and to control the input interface to receive the power-off command; and a controller configured to operate on a standby voltage, the controller being configured to: a first switch control signal to open a first switch to supply the supply voltage to the main module based on the power-off command; and a second switch control signal to open a second switch.which is connected between the external power source and the power supply, based on the output of the first switch control signal.

Description

[Technical area]

[0001] The disclosure relates to a display device and an operating method for it, and for example a display device which includes a power supply, and a method for operating the display device. [State of the art]

[0002] Display devices, such as television sets, are generally equipped with a power supply, such as a switched-mode power supply (SMPS), that provides power to the various components of the display device. The power supply receives mains power (alternating current - AC), converts the AC power into an operating voltage at a level required for a power-hungry device, and applies the voltage to that device.

[0003] The display device can be operated in a standby mode to minimize power consumption when not in use, and the power consumed in standby mode is referred to as standby power. Even when the display device is not in use, essential circuitry, such as that required to receive a power-on command from the user, remains operational and consumes power.

[0004] Recently, active research has been conducted on a method to minimize standby power consumption. [Revelation][Technical Solution]

[0005] According to one embodiment of the disclosure, a display device includes: a power supply configured to provide power to the display device from an external power source, an input interface comprising a circuit configured to receive a power-on command or a power-off command for the display device, a main module comprising a circuit configured to operate at a supply voltage, and a controller comprising a circuit configured to operate at a standby voltage.

[0006] The controller can be configured to output an initial switch control signal based on the power-off command to trigger an initial switch to supply operating voltage to the main module.

[0007] The controller can be configured to output a second switch control signal based on the output of the first switch control signal, in order to open a second switch connected between the external power source and the power supply.

[0008] According to an embodiment of the disclosure, a method for operating a display device includes: controlling, by a main module powered by an operating voltage, an input interface to receive a power-off command for the display device based on the power-off command; outputting, by a controller powered by a standby voltage, a first switch control signal to open a first switch to supply the operating voltage to the main module; and, based on the output of the first switch control signal, outputting, by the controller, a second switch control signal to open a second switch connected between an external power source and a power supply for generating power to be supplied to the display device from the external power source. [Description of the characters]

[0009] The above and other aspects, features and advantages of a particular embodiment of the present disclosure will become clearer with reference to the following detailed description in conjunction with the accompanying figures, in which the following applies: Fig. Figure 1 is a block diagram showing an exemplary configuration of a display device according to an embodiment of the disclosure; Fig. Figure 2 is a block diagram showing an exemplary configuration of a power supply and a standby power supply of a display device according to an embodiment of the disclosure; Fig. Figure 3 is a block diagram showing an exemplary configuration of a power supply and a standby power supply of a display device according to an embodiment of the disclosure; Fig. Figure 4 is a block diagram showing an exemplary configuration of a power supply and a standby power supply of a display device according to an embodiment of the disclosure; Fig. Figure 5 is a circuit diagram showing an exemplary configuration of a display device according to an embodiment of the disclosure; Fig. Figure 6 is a timing diagram showing the timing of each signal in a normal mode and a standby mode of a display device according to an embodiment of the disclosure; Fig. Figure 7 is a flowchart illustrating an exemplary process of a display device for switching to a standby mode from a normal mode based on the receipt of a power-off command according to an embodiment of the disclosure; Fig. Figure 8 is a flowchart illustrating an exemplary process of a display device for switching to a standby mode from a normal mode based on the receipt of a power-off command according to an embodiment of the disclosure; Fig. Figure 9 is a flowchart illustrating an exemplary process of a display device for switching to a normal mode from a standby mode based on the receipt of a power-on command according to an embodiment of the disclosure; Fig. 10 is a flowchart illustrating an exemplary process of a display device for switching to a normal mode from a standby mode based on the receipt of a power-on command according to an embodiment of the disclosure; Fig. Figure 11 is a flowchart illustrating an exemplary process of a display device for switching to a normal mode from a standby mode based on the receipt of a power-on command according to an embodiment of the disclosure; and Fig. Figure 12 is a block diagram showing an exemplary configuration of a power supply and a standby power supply of a display device according to an embodiment of the disclosure. [Mode of invention]

[0010] Before various embodiments of the disclosure are described in more detail, the terms used here will be defined.

[0011] All terms, including descriptive or technical terms, used in the revelation are to be interpreted in such a way as to give them the meanings that would be obvious to an average person skilled in the art. However, the terms may have different meanings depending on the intention of an average person skilled in the art, on precedents, or on the advent of new technologies. Some of the terms used here are chosen arbitrarily; in this case, their meaning is explained in detail in the description of the revelation. Therefore, the terms used in the revelation should not be interpreted solely on the basis of their names, but must be defined based on the meaning of the terms together with the descriptions in the revelation.

[0012] If a part "contains" or "encompasses" an element, then, unless specifically described otherwise, the part may also contain other elements without excluding them. The terms "unit," "module," "block," etc., used here each represent a unit for handling at least one function or process and may be implemented in hardware, software, or a combination thereof.

[0013] One embodiment of the revelation is now described in more detail with reference to the accompanying figures. However, an embodiment of the revelation can be realized in many different forms and is not limited to the forms described here. In the figures, parts not related to the description may be omitted in order to clearly describe the revelation, and identical reference symbols refer to the same elements throughout the revelation.

[0014] In one embodiment of the disclosure, the term “user” may refer to a person who controls a system, function or process, including a developer, administrator or assembly technician.

[0015] In one embodiment of the disclosure, the term “standby mode” may refer to a state in which a display device has its display screen turned off and is able to receive a turn-on command from the user while it is in a power-off state.

[0016] In one embodiment of the disclosure, the term “normal mode” has a meaning opposite to standby mode and can refer to a state in which the display screen is switched on and a processor, such as a central processing unit (CPU), is operating when the display device is in the switched-on state.

[0017] Fig. Figure 1 is a block diagram showing an exemplary configuration of a display device according to an embodiment of the disclosure.

[0018] With reference to Fig. 1 In one embodiment of the disclosure, a display device 100 may include a power supply 110, a standby power supply 120 with a control (e.g. including circuit) 121, a main module (e.g. including circuit) 130 and an input interface (e.g. including input circuit) 140.

[0019] The display device 100 can, for example, include a television (TV), such as a smart TV, internet TV, web TV, internet protocol (IP) TV or the like, a computer, such as a desktop, laptop, tablet or the like, or various types of electronic devices capable of receiving and outputting content, such as various smart devices, e.g., a smartphone, mobile phone, gaming device, music device, video device, medical device, household appliance, etc.

[0020] In one embodiment of the disclosure, the display device 100 can be operated in a normal mode while in a powered-on state. In normal mode, for example, the power supply 100, the main module 130, and the input interface 140 of the display device 100 can be operated. In normal mode, the display device 100 can, for example, supply operating power through the power supply 110 to operate the main module 130 and the input interface 140. Alternatively, in normal mode, for example, the standby power supply 120 of the display device 100 can be operated, and the display device 100 can supply operating power via the standby power supply 120 to operate the main module 130 and the input interface 140.

[0021] In one embodiment of the disclosure, the display device 100 can be operated in a standby mode to minimize and / or reduce power consumption while it is switched off and not in use. In the standby node, the display device 100 can operate the circuits necessary for the operation of the input interface 140 in order to receive a switch-on command from the user. In standby mode, for example, the power supply 110 and the main module 130 of the display device 100 can be inactive. In standby mode, for example, the standby power supply 120, the controller 121, and the input interface 140 of the display device 100 can be operated.In standby mode, the display device 100 can, for example, generate a standby voltage to operate the control unit 121 via the standby power supply 120 and control via the control unit 121 that the supply of operating power to the power supply 110 and to the main module 130 is blocked and the input interface 140 is operated.

[0022] In one embodiment of the disclosure, when the display device 100 receives a power-off command from the input interface 140, it can perform a series of operations to operate in standby mode. For example, the display device 100 can perform an operation in which it switches from normal mode to standby mode.

[0023] In one embodiment of the disclosure, when the display device 100 receives a power-on command from the input interface 140, it can perform a series of operations to operate in normal mode. For example, the display device 100 can perform an operation in which it switches from standby mode to normal mode.

[0024] The corresponding components of the display device 100 will now be described in more detail.

[0025] The display device 100 can supply operating power to its components via the power supply 110. The display device 100 can supply operating power to the input interface 140 in standby mode via the standby power supply 120.

[0026] The power supply 110 can generate power from the external power source 10, which is supplied to the display device 100. The power supply 110 can receive alternating current (AC) power from the external power source 10 and convert the AC power into power at a level suitable for operating the respective components, such as the main module 130, the input interface 140, and a display 150 (see Fig. 2) is required, and supply the converted power to the components. The power supply 110, for example, can include a converter implemented as an isolated switched-mode power supply (SMPS).

[0027] Power supply 110 can be operated in the normal mode of the display device 100. Power supply 110 must not be operated in the standby mode of the display device 100, and all functions must be disabled.

[0028] The standby power supply 120 can generate direct current (DC) power from the external power source 10. For example, the standby power supply 120 can generate an operating voltage for the operation of the main module 130. For example, the standby power supply 120 can convert the operating voltage into a standby voltage to power the controller 121 of the display device 100. The standby power supply 120 can power the main module 130 with the operating voltage and the controller 121 with the standby voltage.

[0029] The standby power supply 120 can be operated in the standby mode of the display device 100. The standby power supply 120 may or may not be operated in the normal mode of the display device 100.

[0030] The controller 121 can include various circuits and be operated with the standby voltage generated by the standby power supply 120, controlling the operation of the input interface 140. For example, the controller 121 can control the input interface 140 so that it receives the power-on command in the standby mode of the display device 100.

[0031] When the display device 100 receives the power-off command, it can execute a stored program via the controller 121 to operate the display device 100 in standby mode. For example, based on the power-off command, the controller 121 can control the operation of unused components to minimize and / or reduce standby power consumption and block leakage current. For example, based on the power-off command, the controller 121 can block the power supply to the power supply 110 and the main module 130. The controller 121 can minimize and / or reduce the standby power consumed by the power supply 110 and the main module 130 in standby mode and minimize and / or reduce leakage current by blocking the power supply to the power supply 110 and the main module 130.

[0032] When the display device 100 receives the power-on command, it can execute a stored program via the controller 121 to switch the display device 100 from standby mode back to normal mode. For example, based on the power-on command, the controller 121 can control the supply of power to the power supply 110 and the main module 130.

[0033] The controller 121 can be operated in the standby mode of the display device 100. The controller 121 can be operated in the normal mode of the display device 100 or not.

[0034] The main module 130 can contain various circuits and control the general operation of the display device 100. The main module 130 can receive and process an image signal and display an image based on it. The main module 130 can be configured in software, hardware, or a combination of both. If the main module 130 is a hardware configuration, it may include a printed circuit board (PCB). The main module 130 can contain at least one processor and one memory. The minimum processor may, for example, include various processing circuits and / or multiple processors.For example, the term "processor" in this context, including the claims, can include various processing circuits, including at least one processor, wherein one or more of at least one processor can be configured individually and / or jointly in a distributed manner to perform various functions described herein. When, in this context, "a processor," "at least one processor," and "one or more processors" are described as being configured to perform multiple functions, these terms cover, for example, and without limitation, situations in which one processor performs some of the functions mentioned and another processor or processors perform other functions mentioned, as well as situations in which a single processor can perform all of the functions mentioned.Furthermore, the at least one processor can include a combination of processors that perform various of the mentioned / disclosed functions, e.g., in a distributed manner. At least one processor can execute program instructions to achieve or perform various functions. For example, the at least one processor can execute various software programs or instructions stored in memory to perform different functions. Various software programs (or applications) for operating the display device 100, data, and instructions for operating the display device 100 can be stored in memory.

[0035] The main module 130 can be powered by operating power. For example, the main module 130 can receive operating power from the standby power supply 120. Alternatively, the main module 130 can receive operating power from the power supply 110. The main module 130 can control the input interface 140 in normal mode. For example, the main module 130 can control the input interface 140 so that it receives the power-off command, a channel control command, a volume control command, etc., in normal mode. Meanwhile, the power-off command for the display device 100 can be received by the main module 130 or the controller 121 in normal mode.

[0036] In standby mode, the main module 130 must not be operated, and all functions must be disabled. In standby mode, the controller 121 can, for example, switch off a first switch 160, which supplies operating power to the main module 130. Alternatively, in standby mode, the controller 121 can, for example, prevent the power supply 110 from supplying operating power to the main module 130. Furthermore, in standby mode, the controller 121 controls the operation of the input interface 140, so there is no need to supply the main module 130 with operating power. Accordingly, the main module 130 is not operated in standby mode, thus minimizing / reducing the standby power consumption by switching operations of the main module 130.

[0037] The input interface 140 can include various interface circuits and receive a command from an external source (e.g., from the user) for use by the display device 100. For example, the input interface 140 can include a microphone to receive the user's voice, a camera to capture an image corresponding to user movement, and an infrared (IR) receiver to receive an IR signal corresponding to user input. For instance, the input interface 140 can receive a control command, including a power-on or power-off command, for the display device 100 from a remote control device (e.g., a remote control) via a wireless short-range communication interface, such as a Bluetooth, near-field communication (NFC), or IR receiver. The input interface 140 can then forward the control command to the processor of the main module 130.Furthermore, the input interface 140 can, for example, forward the control command directly to the controller 121.

[0038] The input interface 140 can be operated in the standby mode of the display device 100. For example, in standby mode, the input interface 140 can forward the received control command not to the processor of the main module 130, but to the controller 121.

[0039] The input interface 140 can be operated in the normal mode of the display device 100. For example, in normal mode, the input interface 140 can forward the received control command to the processor of the main module 130 and / or the controller 121.

[0040] In one embodiment of the disclosure, the display device 100 may further include a first switch 160 and a second switch 170.

[0041] The first switch 160 can be located between an output end of a circuit that generates an operating voltage for the main module 130 in the standby power supply 120, and the main module 130. For example, the operating voltage for the main module 130 can be supplied by a trans-circuit 123 from Fig. 2 are generated. The first switch 160 can, based on a first switch control signal received from the controller 121, allow or block the operating voltage for the operation of the main module 130 to pass through to the main module 130.

[0042] The second switch 170 can be located between the external power source 10 and the power supply 110. Based on a second switch control signal received from the controller 121, the second switch 170 can either allow or block AC power to operate the power supply 110. In one embodiment of the disclosure, the indicator device 100 can minimize / reduce standby power by controlling the first switch 160 and the second switch 170 via the controller 121.

[0043] In one embodiment of the disclosure, the controller 121 can, based on the switch-off command, control the operating voltage for the main module 30 so that it is not supplied to the main module 130. For example, the controller 121 can output the first switch control signal to open the first switch 160, which is located between the output end of the operating voltage and the main module 130. The first switch control signal can be a signal to switch off the first switch 160. Accordingly, the power consumption by the operation of the main module 130 can be minimized and / or reduced.

[0044] In one embodiment of the disclosure, the controller 121 can control the supply of external power from the external power source 10 to the power supply 110 to be blocked, based on the switch-off command. For example, the controller 121 can output the second switch control signal to open the second switch 170, which is located between the power supply 110 and the external power source 10. The second switch control signal can be a signal to switch off the second switch 170. Accordingly, the power consumption by the operation of the power supply 110 can be minimized and / or reduced.

[0045] In one embodiment of the disclosure, the controller 121 can, based on the power-on command, output the second switch control signal to close the second switch 170 in order to connect the power supply 110 to the external power source 10. The second switch control signal can be a signal to turn on the second switch 170.

[0046] In one embodiment of the disclosure, the controller 121 can, based on the power-on command, output the first switch control signal to close the first switch 160, which supplies operating power to the main module 130. The first switch control signal can be a signal to turn on the first switch 160.

[0047] In one embodiment of the disclosure, the display device 100 can generate a standby voltage in standby mode, operate the controller 121 with the standby voltage, and operate the input interface 140 to receive the power-off command. In standby mode, the display device 100 can operate the input interface 140 and the controller 121 and block the power supply for the operation of other circuits, such as the power supply 110 or the main module 130. Since the power supply 110 is not operating in standby mode, the power consumption through power transformation can be minimized and / or reduced. Since the main module 130 is not operating in standby mode, the power consumption for controlling the input interface 140 can also be minimized and / or reduced.

[0048] Fig. Figure 2 is a block diagram showing an exemplary configuration of a power supply and a standby power supply of a display device according to an embodiment of the disclosure.

[0049] With reference to Fig. 2 The display device 100 can include the power supply 110, the standby power supply 120, the main module 130, an IR receiver (e.g. including an IR receiving circuit) 141, the display 150, the first switch 160 and the second switch 170.

[0050] In one embodiment of the disclosure, the power supply 110 can include a first rectifier 111, a power factor (PF) corrector 112, a power transformer 113 and a display driver 114.

[0051] Power supply 110 can receive AC power from external power source 10. Power supply 110 can convert the AC power received from external power source 10 into DC power. Power supply 110 can supply the display 150 with the required power.

[0052] The first rectifier 111 can rectify the power received from the external power source 10. The first rectifier 111 can convert the received AC power into DC power. The first rectifier 111 can, for example, supply a unidirectional voltage or a unidirectional current. The first rectifier 111 can be implemented, for example, as a half-wave or full-wave rectification circuit, e.g., using bridge diodes.

[0053] The power factor corrector (PFC) 112 can correct the power factor (PF) of the DC power converted by the first rectifier 111 and output a DC voltage that has undergone PF correction. The PFC 112 can minimize and / or reduce reactive power by correcting the phase and waveform of the DC power supplied by the first rectifier 111. For example, the PFC 112 can control a converter to output a DC voltage with a better PF. The DC voltage can be, for example, approximately 390 V, but is not limited to this value.

[0054] The power transformer 113 can regulate the DC voltage output by the PFC 112 and supply each component, e.g., the display 150, with a constant-level voltage. The power transformer 113 can include an isolated converter and a transformer with a primary side (input side) and a secondary side (output side) that are isolated from each other. For example, if the current in the primary winding on the primary side of the power transformer 113 changes, an electromotive force can be induced in the secondary winding on the secondary side due to a change in flux, and the induced current can flow in the secondary winding. Thus, the power transformer 113 can, for example, generate the power required to operate the display 150 (e.g., a drive voltage Vdrv). The power transformer 113 can, for example,It can be implemented as a DC-DC local link converter (LLC), but is not limited to that.

[0055] The display driver 114 can supply the drive voltage Vdrv, which is required for the display 150 to show an image (or a video image).

[0056] The display 150 can show the image (or video image). For example, the display 150 can show the image based on received image information. The image information can be stored, for example, in the internal memory of the main module 130 or received from an external device. The display 150 can incorporate a variety of pixels, including light-emitting diodes (LEDs), organic LEDs (OLEDs), etc. The display 150 can be operated based on the drive voltage Vdrv.

[0057] In one embodiment of the disclosure, the standby power supply 120 can include a second rectifier 122, a trans-circuit 123, a low-dropout (LDO) regulator 124, and the controller 121. In the disclosure, each of the first switch 160 and the second switch 170 can be a component included in the standby power supply 120, or they can be implemented as components separate from the standby power supply 120.

[0058] The standby power supply 120 can receive AC power from the external power source 10. The standby power supply 120 can convert the AC power received from the external power source 10 into DC power. The standby power supply 120 can supply a required operating voltage to the main module 130. The standby power supply 120 can supply a standby voltage Vstby, which is required for the controller 121.

[0059] The second rectifier 122 can rectify the power received from the external power source 10. The second rectifier 122 can convert the received AC power into DC power. The second rectifier 122 can, for example, supply a unidirectional voltage or a unidirectional current. The second rectifier 122 can be implemented, for example, as a half-wave or full-wave rectification circuit, e.g., using bridge diodes.

[0060] The trans-circuit 123 can regulate the DC power output of the second rectifier 122 and supply each component, such as the controller 121, the main module 130, etc., with a constant-level voltage. The trans-circuit 123 can include an isolated converter and a transformer with a primary (input) side and a secondary (output) side that are isolated from each other. For example, if the current in the primary winding on the primary side of the trans-circuit 123 changes, an electromotive force can be induced in the secondary winding on the secondary side due to a change in flux, and the induced current can flow in the secondary winding. The trans-circuit 123 can, for example, induce the voltage applied to the primary side in the secondary side and output the voltage.For example, the transceiver circuit 123 can rectify the voltage it outputs using diodes and capacitors connected to the secondary side to output a voltage equal to a preset voltage. Thus, the transceiver circuit 123 can, for instance, output a voltage Vout equal to the operating voltage for the main module 130. The preset voltage might be approximately 13 V, but is not limited to this. For example, the output voltage Vout could be equal to, higher than, or lower than 13 V. The transceiver circuit 123 could, for example, generate the standby voltage Vstby, which is supplied to the controller 121 via the LDO regulator 124. The transceiver circuit 123 could, for example, be implemented as a flyback converter, but is not limited to this.

[0061] The LDO regulator 124 can be a linear regulator that operates with a small input and output potential difference. The LDO regulator 124 can generate an output voltage that is lower than an input voltage. For example, the LDO regulator 124 can output the standby voltage Vstby with an input of the output voltage Vout of the trans-circuit 123. Thus, the LDO regulator 124 can generate a standby voltage Vstby that is lower than the output voltage Vout. For example, the output voltage Vout could be approximately 13 V, which corresponds to the operating voltage of the main module 130, and the standby voltage Vstby could be approximately 3.3 V. For example, the LDO regulator 124 can apply the standby voltage Vstby to the controller 121, and the controller 121 can operate in standby mode with the standby voltage Vstby.

[0062] The controller 121 can be operated using the standby voltage Vstby received from the LDO regulator 124. The controller 121 can control the operation of the IR receiver 141 based on the standby voltage Vstby. The controller 121 can receive the on or off command for the display device 100 via the IR receiver 141.

[0063] The IR receiver 141 can receive an IR signal corresponding to user input. The IR receiver 141 can only be one example of the input interface 140, but the input interface 140 is not limited to it.

[0064] For example, the on or off command for the display device 100 can be an IR signal in an IR communication scheme. When the controller 121 receives the on or off command for the display device 100 via the IR receiver 141, it can control whether power is supplied to the power supply 110 and the main module 130. For example, the controller 121 can control whether power is supplied to the main module 130 by outputting the first switch control signal to turn the first switch 160 on or off. Similarly, the controller 121 can control whether power is supplied to the power supply 110 by outputting the second switch control signal to turn the second switch 170 on or off.

[0065] For example, when the controller 121 receives the power-on command for the display device 100 via the IR receiver 141, it can control the blocking of power to the power supply 110 and the main module 130. For example, the controller 121 can provide the second switch control signal to turn off the second switch 170 to block power to the power supply 110. Similarly, the controller 121 can provide the first switch control signal to turn off the first switch 160 to block power to the main module 130.

[0066] Furthermore, when the controller 121 receives the switch-on command for the display device 100 via the IR receiver 141, it can control the power supplied to the power supply 110 and the main module 130. For example, the controller 121 can provide the second switch control signal to switch on the second switch 170 in order to supply power to the power supply 110. For example, the controller 121 can provide the first switch control signal to switch on the first switch 160 in order to supply operating power to the main module 130.

[0067] The main module 130 can be operated based on an operating voltage received from the power supply 110 (e.g., a first operating voltage). It can also be operated based on an operating voltage received from the standby power supply 120 (e.g., a second operating voltage). The main module 130 can output a power control signal (e.g., PS_ON), ​​which is either a turn-on signal or a turn-off signal, to the controller 121. For example, the main module 130 can provide the power control signal, which is a turn-off signal, to the controller 121, so that the controller 121 operates in standby mode. Similarly, the main module 130 can provide the power control signal, which is a turn-on signal, to the controller 121, so that the controller 121 operates in normal mode. The controller 121 can receive the power control signal, which is either a turn-on or turn-off signal, from the main module 130.

[0068] In one embodiment of the disclosure, when the main module 130 receives the power-off command for the display device 100 via the IR receiver 141 in normal mode, it can store the current operating state unchanged in its memory and provide the power control signal, which is a power-off signal, to the controller 121, so that the controller 121 operates in standby mode. The controller 121 can then perform an operation to switch the display device 100 into standby mode based on the power control signal (power-off signal) received from the main module 130. For example, based on the power control signal, the controller 121 can control the first switch 160 by outputting the first switch control signal and control the second switch 170 by outputting the second switch control signal.

[0069] Alternatively, in one embodiment of the disclosure, the controller 121 can perform an operation to switch the display device 100 into standby mode based on receiving the switch-off command for the display device 100 via the IR receiver 141 in normal mode.

[0070] In one embodiment of the disclosure, the controller 121 can perform a switching operation to normal mode based on receiving the power-on command for the display device 100 via the IR receiver 141 while in standby mode. For example, based on the power-on command, the controller 121 can supply power to the power supply 110 by outputting the second switch control signal and supply the operating voltage to the main module 130 by outputting the first switch control signal. The main module 130 can then operate based on the operating voltage and output the power control signal, which is a power-on signal, to the controller 121, so that the controller 121 operates in normal mode.

[0071] In one embodiment of the disclosure, in the standby mode of the display device 100, the IR receiver 141 and the controller 121 are the main power-consuming components. The controller 121 can identify whether the power-on command for the display device 100 is received by the IR receiver 141, thereby minimizing / reducing the standby power consumed for the operation of the power supply 110 and / or the main module 130. For example, the standby power of the display device 100 can be less than approximately 0.005 W.

[0072] Fig. Figure 3 is a block diagram showing an exemplary configuration of a power supply and a standby power supply of a display device according to an embodiment of the disclosure.

[0073] With reference to Fig. 3. The display device 100 can include the power supply 110, the standby power supply 120, the main module 130, the IR receiver 141, the display 150, the first switch 160, and the second switch 170. In one embodiment of the disclosure, the display device 100 can also include a trans-control (e.g., including a circuit) 310, a feedback circuit 320, and a third switch 330, which are contained in the trans-circuit 123.

[0074] In one embodiment of the disclosure, the trans-circuit 123 can include the trans-control 310 and the feedback circuit 320.

[0075] The trans-control unit 310 can include various circuits and control the trans-circuit 123 to output a voltage Vout equal to a preset voltage. The trans-control unit 310 can apply a control signal to the trans-circuit 123 to set an on / off duty cycle of the switch 510 (see Fig. 5) The Trans-Circuit 310 can be implemented, for example, with an integrated circuit (IC) for pulse width modulation (PWM), but is not limited to this.

[0076] If the output voltage Vout from the transceiver circuit 123 is outside a range of the preset voltage, the feedback circuit 320 can output a feedback signal to the transceiver control 310. The transceiver circuit 123 can then generate, via the feedback circuit 320, an output voltage Vout that is equal to the operating voltage for the main module 130. The feedback circuit 320 can, for example, include an optocoupler.

[0077] The transceiver circuit 123 can further include the third switch 330, which supplies the feedback circuit 320 with the operating voltage for its operation. The third switch 330 can be located between the feedback circuit 320 and the operating voltage. The third switch 330 can be closed or opened based on a third switch control signal, which is an on or off signal, received by the controller 121. For example, the third switch 330 can be closed based on the third switch control signal, which is an on signal received by the controller 121, to supply the operating voltage for the operation of the feedback circuit 320. For example, the third switch 330 can be opened based on the third switch control signal, which is an off signal received by the controller 121, to block the operating voltage for the operation of the feedback circuit 320.

[0078] The controller 121 can receive the standby voltage, output the first switch control signal to the first switch 160, output the second switch control signal to the second switch 170, and output the third switch control signal to the third switch 330.

[0079] In one embodiment of the disclosure, the controller 121 can output a switch control signal for switching off the feedback circuit 320, e.g., the third switch control signal, which is the switch-off signal, based on the switch-off command for the display device 100. The feedback circuit 320 can be switched off according to the third switch control signal. When the feedback circuit 320 is switched off, the trans-controller 310 can be operated in a burst mode. The burst mode can refer to a light-load operation, i.e., an operation to increase efficiency when the output current is only used to a small extent. For example, the controller 310 can increase efficiency by reducing the on / off switching frequency of a switch 540 per unit of time according to the burst mode.According to the burst method, the trans-control 310 can, for example, keep the on-time or off-time of the switch 540 constant and change the frequency.

[0080] In one embodiment of the disclosure, the controller 121 can output the first switch control signal and the second switch control signal sequentially based on the switch-off command for the display device 100, and output the third switch control signal.

[0081] In one embodiment of the disclosure, the controller 121, based on the power-on command for the display device 100, can additionally output a switch control signal for turning on the feedback circuit 320, e.g., the third switch control signal, which is the power-on signal. The feedback circuit 320 can be turned on according to the third switch control signal. When the feedback circuit 320 is in operation, the trans-controller 310 can maintain a constant on / off switching frequency per unit of time by maintaining a constant frequency according to a PWM method and varying an on-time or off-time of the switch 540 (e.g., by controlling a duty cycle). The PWM method can differ from the burst method.

[0082] In one embodiment of the disclosure, the controller 121 can output the third switch control signal based on the switch-on command for the display device 100, and then sequentially output the second switch control signal and the first switch control signal.

[0083] In one embodiment of the disclosure, in the standby mode of the display device 100, the IR receiver 141 and the controller 121 are the main power-consuming components. The controller 121 can identify whether the power-on command for the display device 100 is received by the IR receiver 141, thereby minimizing and / or reducing the standby power consumed for the operation of the power supply 110, the main module 130, and / or the feedback circuit 320. For example, the standby power of the display device 100 can be less than approximately 0.005 W.

[0084] Fig. Figure 4 is a block diagram showing an exemplary configuration of a power supply and a standby power supply of a display device according to an embodiment of the disclosure.

[0085] With reference to Fig. 4. The display device 100 can include the power supply 110, the standby power supply 120, the main module 130, the IR receiver 141, the display 150, the first switch 160, and the second switch 170. In one embodiment of the disclosure, the display device 100 can also include a fourth switch 410.

[0086] The fourth switch 410 can supply an operating voltage (e.g., Vcc) to the IR receiver 141 to operate it, or it can block the operating voltage Vcc. The fourth switch 410 can be located between the IR receiver 141 and the operating voltage. The fourth switch 410 can be closed or opened based on a fourth switch control signal, which is an on or off signal, received by the controller 121. For example, the fourth switch 410 can be closed based on the fourth switch control signal, which is an on signal received by the controller 121, to supply the operating voltage for the operation of the IR receiver 141. Conversely, the fourth switch 410 can be opened based on the fourth switch control signal, which is an off signal received by the controller 121, to block the operating voltage for the operation of the IR receiver 141.

[0087] The controller 121 can control the operation of the IR receiver 141. The controller 121 can control the fourth switch 410 to apply the operating voltage for the operation of the IR receiver 141.

[0088] In one embodiment of the disclosure, when the display device 100 is in normal mode, the controller 121 can send the fourth switch control signal as a switch-on signal to the fourth switch 410 to operate the IR receiver 141.

[0089] In one embodiment of the disclosure, when the display device 100 is in standby mode, the controller 121 can repeatedly output the fourth switch control signal, which is the turn-on signal, and the fourth switch control signal, which is the turn-off signal, to the fourth switch 410 to repeatedly turn the IR receiver 141 on and off at regular intervals. The process of repeatedly turning the IR receiver 141 on and off consumes less power than if the IR receiver 141 remained constantly on, thereby minimizing / reducing the standby power consumption of the display device 100 in standby mode.

[0090] In one embodiment of the disclosure, the IR receiver 141 can successively receive a plurality of IR signals based on user input. For example, the IR receiver 141 can successively receive a first power-on command and a second power-on command (see 615 in Fig. 6).

[0091] In one embodiment of the disclosure, when the display device 100 is in standby mode, the controller 121 can receive the first power-on command for the display device 100 from the IR receiver 141. While the controller 121 operates the IR receiver 141 as a power-on signal in standby mode via the fourth switch control signal, the controller 121 can receive the first power-on command via the IR receiver 141.

[0092] In one embodiment of the disclosure, the controller 121 can, based on the first switch-on command, send the fourth switch control signal as a switch-on signal to the fourth switch 410 in order to constantly supply the IR receiver 141 with operating power.

[0093] In one embodiment of the disclosure, the controller 121 can perform a series of operations to operate the display device 100 in standby mode based on receiving the second power-on command for the display device 100 from the switched-on IR receiver 141. For example, the controller 121 can prevent and / or reduce the power consumption of the main module 130 by outputting the first switch control signal to the first switch 160, and prevent and / or reduce the power consumption of the power supply 110 by outputting the second switch control signal to the second switch 170.

[0094] Fig. Figure 5 is a circuit diagram showing an exemplary configuration of a display device according to an embodiment of the disclosure.

[0095] With reference to Fig. 5. The display device 100 can include the power supply 110, the standby power supply 120, the main module 130, the IR receiver 141, the display 150, the first switch 160, the second switch 170, the third switch 330, and the fourth switch 410. In one embodiment of the disclosure, the display device 100 can include the control (e.g., including a circuit) 121, which is located on the secondary side.

[0096] The standby power supply 120 can include the second rectifier 122, the trans-circuit 123, the LDO regulator 124 and the control unit 121.

[0097] The second rectifier 122 can rectify the power received from the external power source 10. The second rectifier 122 can convert the received AC power into DC power. The second rectifier 122 can, for example, be implemented using bridge diodes.

[0098] The trans-circuit 123 can regulate the DC power output of the second rectifier 122 and supply each component, such as the controller 121, the main module 130, etc., with a constant-level voltage. The trans-circuit 123 can include a transformer 510, a rectifying diode 520, a smoothing capacitor 530, the trans-controller 310, the feedback circuit 320, and the third switch 330. The feedback circuit 320 can be located on the secondary side, while the trans-circuit 310 and the third switch 330 can be located on the primary side.

[0099] In transformer 510, the primary and secondary sides can be separate. Transformer 510 can include a primary winding 511 and a secondary winding 512, in which a specific voltage is induced by the primary winding 511. The rectifying diode 520 rectifies the voltage induced in the secondary winding 512, and the smoothing capacitor 530 smooths the output voltage Vout across the rectifying diode 520. The output voltage Vout across the rectifying diode 520 can be applied to the feedback circuit 320, and the feedback circuit 320 can provide a feedback signal to the transceiver circuit 310 based on the output voltage Vout. Based on the feedback signal received from the feedback circuit 320, the transceiver control 310 can set an on / off duty cycle of the switch 540.For example, the transceiver 310 can output a switching control signal with a long duty cycle to the switch 540 if it is determined that the output voltage Vout is higher than a preset voltage. The transceiver 310 can output a switching control signal with a short duty cycle to the switch 540 if it is determined that the output voltage Vout is lower than the preset voltage.

[0100] The LDO regulator 124 can output the standby voltage Vstby using an input of the output voltage Vout received by the trans-circuit 123. For example, the output voltage Vout can be approximately 13 V and the standby voltage Vstby approximately 3.3 V. The LDO regulator 124 can apply the standby voltage Vstby to the controller 121, and the controller 121 can then operate in standby mode with the standby voltage Vstby.

[0101] The first switch 160 can output the voltage Vout received from the trans-circuit 123 to the main module 130. The first switch 160 can be located between a terminal of the input voltage Vload_in and a terminal of the output voltage Vload_out. The first switch 160 can be a load switch that blocks unused voltage to reduce standby power consumption in standby mode. The load switch can refer to a switch for blocking the voltage to keep the display device 100 in standby mode. The first switch 160 can include various switching devices. For example, the first switch 160 can include a field-effect transistor (FET), a bipolar junction transistor (BJT), etc., but is not limited to these.

[0102] The first switch 160 can be controlled by a first switch control signal SW1 of the controller 121. When the first switch 160 is on, the output voltage Vout can be supplied to the main module 130, and when the first switch 160 is off, the output voltage Vout cannot be supplied to the main module 130.

[0103] In one embodiment of the disclosure, an inrush current can occur when the first switch 160 is turned on. The inrush current refers to an excessive charging current that arises to charge an output capacitor when the load switch is turned on. When the inrush current occurs, it significantly exceeds the current normally used, which can damage the load switch. Accordingly, the controller 121 can limit the inrush current by means of a soft-start control if the controller 121 outputs the first switch control signal SW1 as a turn-on signal to the first switch 160. The soft-start control can, for example, refer to an operation of the controller 121 in which the magnitude of the first switch control signal SW1 to be output to the first switch 160 is gradually increased.For example, to turn on the first switch 160, the controller 121 can gradually increase the on-time of the first switch 160 (see normal mode 660 in 640 off . Fig. 6).

[0104] The second switch 170 can be located between the external power source 10 and the power supply 110. The second switch 170 can be a relay that blocks the voltage to reduce the standby power consumption of the power supply 110 in standby mode. The relay can be switched on by a magnetic force generated by a coil carrying a current when a certain power level is received. The second switch 170 can be controlled by a second switch control signal SW2 from the controller 121. When the second switch 170 is switched on, the power supply 110 can be supplied with power. When the second switch 170 is switched off, the power supply 110 is not supplied with power because it is physically disconnected, thus preventing any standby power consumption.For example, the circuits forming the first rectifier 111, the PFC 112 and the power transformer 113 must not be supplied with power.

[0105] In one embodiment of the disclosure, when the display device 100 is switched from standby mode to normal mode, the controller 121 must turn on the feedback circuit 320 and then turn on the second switch 170. The coil of the second switch 170 can generate a magnetic force in response to receiving the output voltage Vout of the trans-circuit 123. The output voltage Vout of the trans-circuit 123 can deviate from the preset voltage until the feedback process of the feedback circuit 320 is complete. Therefore, if the second switch control signal is provided as a turn-on signal for the second switch 170 before the feedback process is complete, the second switch 170 may malfunction even when it is not actually turned on.

[0106] The third switch 330 can be located between the feedback circuit 320 and the operating voltage of the feedback circuit 320 and can be controlled by the controller 121. The controller 121 can block the operating voltage to the feedback circuit 320 via the third switch 330 to reduce standby power consumption in standby mode. The third switch 330 can be controlled by a third switch control signal SW3 from the controller 121. When the third switch 330 is open, the feedback circuit 320 can be open, and when the third switch 330 is open, the feedback circuit 320 can be closed. The third switch control signal SW3 can be referred to as the wake-up signal.

[0107] The fourth switch 410 can be located between the IR receiver 141 and the operating voltage (e.g., Vcc) of the IR receiver 141 and can be controlled by the controller 121. The fourth switch 410 can be controlled by a fourth switch control signal SW4 of the controller 121. When the fourth switch 410 is on, the IR receiver 141 can be on, and when the fourth switch 410 is off, the IR receiver 141 can be off. In one embodiment of the disclosure, when the display device 100 is in standby mode, the controller 121 can repeatedly provide on and off signals to the fourth switch 410 to control the operation of the IR receiver 141 (see a standby mode 670 in 620). Fig. 6).

[0108] The controller 121 can be operated using the standby voltage Vstby received from the LDO regulator 124. The controller 121 can control the operation of the IR receiver 141 based on the standby voltage Vstby. The controller 121 can receive the power-on command for the display device 100 via the IR receiver 141 and perform a series of operations to switch from standby mode to normal mode. The controller 121 can receive the power-off command for the display device 100 via the IR receiver 141 and perform a series of operations to switch from normal mode to standby mode. The controller 121 can be implemented as a micro control unit (MCU), but is not limited to this.

[0109] When the display device 100 is in normal mode, the first power supply 110, the main module 130, the standby power supply 120, the feedback circuit 320, the IR receiver 141, the first switch 160, the second switch 170, the third switch 330 and the fourth switch 410 can be switched on.

[0110] When the display device 100 is in standby mode, the first power supply 110, the main module 130, the feedback circuit 320, the first switch 160, the second switch 170, and the third switch 330 can be switched off. In standby mode, the standby power supply 120, the IR receiver 141, and the fourth switch 410 can be switched on. The power supply 110, the feedback circuit 320, and the main module 130 are not operated in standby mode, thus minimizing / reducing standby power consumption.

[0111] When the PFC 112 is operated while the power supply 110 is in standby mode, the DC power undergoing PFC correction can be supplied to the trans-circuit 123 via a blocking diode 550. Since, for example, the voltage of the trans-circuit 123 is converted into the DC power of the PFC 112, the power system quality can be maintained. For example, the PFC 112 can provide DC power where voltage and current are in phase. Similarly, the trans-circuit 123 can provide DC power where voltage and current are out of phase and can convert the DC power received from the PFC 112 into power where voltage and power are in phase.

[0112] The circuit configuration of the display device 100, as shown in Fig. Figure 5 is an example and is not limited to it. In particular, the circuit configuration of the power supply 110 can convert AC power to DC power and can be replaced by any type of circuit capable of generating the power required for each component of the display device 100.

[0113] Fig. Figure 6 is a timing diagram showing the timing of each signal in a normal mode and a standby mode of a display device according to an embodiment of the disclosure. Fig. 6 is used in conjunction with Fig. 5 described.

[0114] In 605 from Fig. 6. The display device 100 can receive AC power when connected to the external power source 10.

[0115] In 610 from Fig. 6. When the external power source 10 is connected to the display device 100, the standby power supply 120 can be operated and generate the standby power Vstby. The standby power Vstby can be, for example, approximately 3.3 V, but is not limited to this.

[0116] In 615 from Fig. The IR receiver 141 can receive an IR signal for a power-off command in normal mode 660. It can also receive an IR signal for a power-on command in standby mode 670. The IR receiver 141 can receive the IR signal at least twice via a user input. For example, the IR receiver 141 can receive a first power-on command 1 and a second power-on command 2.

[0117] In 620 from Fig. 6. The controller 121 can output the fourth switch control signal SW4 as an on signal to the fourth switch 410 in normal mode 660. The fourth switch 410 can be switched on in normal mode 660. In addition, the controller 121 can repeatedly output the fourth switch control signal SW4, the on and off signals, to the fourth switch 410 in standby mode 670.

[0118] In 625 from Fig. 6. The controller 121 can output the third switch control signal SW3 as an on signal to the third switch 330 in normal mode 660. The third switch 330 can be on in normal mode 660. Furthermore, the controller 121 can output the third switch control signal SW3 as an off signal to the third switch 330 in standby mode 670. The third switch 330 can be off in standby mode 670.

[0119] In 630 from Fig. 6. The controller 121 can receive the power control signal PS_ON as a switch-on signal from the main module 130 in normal mode 660. The controller 121 can receive the power control signal PS_ON as a switch-off signal from the main module 130 in standby mode 670.

[0120] In 635 from Fig. 6. The controller 121 can output the second switch control signal SW2 as an on signal to the second switch 170 in normal mode 660. The second switch 170 can be on in normal mode 660. Furthermore, the controller 121 can output the second switch control signal SW2 as an off signal to the second switch 170 in standby mode 670. The second switch 170 can be off in standby mode 670.

[0121] In 640 from Fig. 6. The controller 121 can output the first switch control signal SW1 as an on signal to the first switch 160 in normal mode 660. The first switch 160 can be on in normal mode 660. Furthermore, the controller 121 can output the first switch control signal SW1 as an off signal to the first switch 160 in standby mode 670. The first switch 160 can be off in standby mode 670.

[0122] The controller 121 can limit an inrush current by means of a soft-start control if the controller 121 outputs the first switch control signal SW1 as a switch-on signal to the first switch 160. For example, the controller 121 can perform an operation 641 to gradually increase the magnitude of the first switch control signal SW1 (641) to be output to the first switch 160.

[0123] In 645 and 650 from Fig. 6. The input voltage Vload_in at the first switch 160 in normal mode 660 can be equal to the output voltage Vout of the trans-circuit 123, which is powered by the external power source 10. Since the first switch 160 is switched on in normal mode 660, the output voltage Vload_out of the first switch 160 can also be equal to the input voltage Vload_in. Since the feedback circuit 320 is switched off in standby mode 670, and thus the output voltage Vout is less than a range of the preset voltage, the input voltage Vload_in of the first switch 160 can be reduced. In standby mode 670, the first switch 160 is switched off, so the output voltage Vload_out of the first switch 160 can be approximately 0 V.

[0124] In one embodiment of the disclosure, the controller 121 can receive the switch-off command for the display device 100 via the IR receiver 141 in normal mode 660. Furthermore, the main module 130 can receive the switch-off command for the display device 100 via the IR receiver 141 in normal mode 130. The main module 130 can store an operating state unchanged in its memory and provide the power control signal PS_ON as a switch-off signal to operate the controller 121 in standby mode. When the controller 121 receives the power control signal PS_ON as a switch-off signal, it can output the first switch control signal SW1 as a switch-off signal to the first switch 160 to block the supply of the output voltage Vout delivered to the main module 130.The controller 121 can output the second switch control signal SW2 as an off signal to the second switch 170 to block the supply of external power from the external power source 10 to the power supply 110. The controller 121 can output the third switch control signal SW3 as an off signal to the third switch 330 to switch off the feedback circuit 320.

[0125] In one embodiment of the disclosure, the controller 121 can receive the switch-on command for the display device 100 via the IR receiver 141 in standby mode 670. The controller 121 can output a wake-up signal to switch on the feedback circuit 320. For example, the controller 121 can output the third switch control signal SW3 as a switch-on signal to the third switch 330. The controller 121 can output the second switch control signal SW2 as a switch-on signal to the second switch 170 to switch on the power supply 110. The controller 121 can output the first switch control signal SW1 as a switch-on signal to the first switch 160 to switch on the main module 130. The controller 121 can receive the power control signal PS_ON as a switch-on signal from the switched-on main module 130 to operate in normal mode.

[0126] A process for operating the display device 100 in standby mode in response to receiving the power-off command in normal mode is now described with reference to the Fig. 7 and Fig. 8 described in more detail.

[0127] Fig. Figure 7 is a flowchart illustrating an exemplary process of a display device for switching to a standby mode from a normal mode based on the receipt of a power-off command according to an embodiment of the disclosure.

[0128] With reference to Fig. 7. In operation 710, the display device 100 can control the input interface 140 to receive the power-off command for the display device 100.

[0129] In one embodiment of the disclosure, the display device 100 can generate an operating voltage for the main module 130 from the external power source 10 via the trans-circuit 123. Furthermore, the display device 100 can generate a standby voltage, lower than the operating voltage, based on the operating voltage via a regulator (e.g., the LDO regulator 124). In one embodiment of the disclosure, the main module 130 can be operated with the operating voltage. In another embodiment of the disclosure, the controller 121 can be operated with the standby voltage. The standby power supply 120, which includes the trans-circuit 123 and the LDO regulator 124, can be operated as a configuration separate from the power supply 110, generating a voltage from the external power supply 10 to operate the display device 100.

[0130] For example, the main module 130, which is powered by the operating voltage, can control the input interface 140 to receive the power-off command for the display device 100. Based on receiving the power-off command for the display device 100, the main module 130 can store the current operating state unchanged in memory. For example, the main module 130 can control the input interface 140 through the at least one processor contained in the main module 130, which executes one or more instructions stored in memory.

[0131] In addition, for example, the controller 121, which is operated with the standby voltage, can control the input interface 140 to receive the switch-off command for the display device 100.

[0132] In normal mode, input interface 140 can be controlled by the main module 130 and forward the shutdown command to the main module 130. Furthermore, in normal mode, input interface 140 can be controlled by the controller 121 and forward the shutdown command to the controller 121. Meanwhile, the main module 130, as will be described later in connection with the Fig. 9 and Fig. As described in section 10, the display device 100 does not receive the power-on command from the input interface 140 because it is not operating in standby mode. In standby mode, the display device 100 can receive the power-on command from the input interface 140 under the control of the controller 121.

[0133] The input interface 140 can receive the on / off command for the display device 100. The input interface 140 can, for example, be the IR receiver 141, and the on / off command can be an IR signal, but is not limited to this. The input interface 140 can, for example, be a keypad or a function key such as an on / off switch, and the on / off command can be a function key signal.

[0134] When the shutdown command is received, the input interface 140 can forward the shutdown command to the main module 130 and the controller 121. Meanwhile, the input interface 140 can forward the power-on command to the controller 121 in standby mode, as described below with reference to Fig. 9 and Fig. 10 is described in more detail.

[0135] In operation 720, the controller 121 can output the first switch control signal SW1 based on the off command to open the first switch 160, which supplies the operating voltage for the operation of the main module 130 to the main module 130. The first switch control signal SW1 can be a signal to turn off the first switch 160.

[0136] For example, the controller 121 can output a control signal to switch off the main module 130. The controller 121 can provide the first switch control signal SW1 as a switch-off signal for the first switch 160 to block the supply of operating power to the main module 130. Thus, the controller 121 can, for example, prevent the output voltage generated by the trans-circuit 123 from being supplied to the main module 130. Accordingly, the power consumption in standby mode can be minimized and / or reduced by keeping the main module 130 operational.

[0137] The first switch 160, for example, could be a load switch that blocks unused voltage to reduce standby power consumption. The first switch 160 could incorporate a FET, a BJT device, etc., but is not limited to these components.

[0138] In operation 730, the controller 121 can output the second switch control signal SW2 to open the second switch 170, which is connected between the external power source 10 and the power supply 110, in order to generate power from the external power source 10 to supply the display device 100. The second switch control signal SW2 can also be a signal to turn off the second switch 170.

[0139] For example, the controller 121 can output a control signal to switch off the power supply 110. The controller 121 can provide the second switch control signal SW2 as a switch-off signal to the second switch 170 to block the supply of external power from the external power source 10 to the power supply 110. Accordingly, the power consumption in standby mode can be minimized and / or reduced by operating the power supply 110.

[0140] The second switch 170 can, for example, be a relay that blocks voltage to reduce the standby power consumption of the power supply 110 in standby mode.

[0141] In one embodiment of the disclosure, the display device 100 can control components other than the input interface 140 and the controller 121 to be switched off in standby mode. For example, the display device 100 can control the switching off of the power supply 110 and the main module 130 via the controller 121. Thus, for example, the power supply 110, the main module 130, and the feedback circuit 320 can be switched off in standby mode. Accordingly, in the standby mode of the display device 100, the input interface 140 and the controller 121 are the main components that consume power. The controller 121 can identify whether the switch-on command for the display device 100 in standby mode is received by the IR receiver 140, thereby minimizing / reducing the standby power consumed for the operation of the power supply 110 and / or the main module 130.

[0142] Fig. Figure 8 is a flowchart illustrating an exemplary process of a display device for switching to a standby mode from a normal mode based on the receipt of a power-off command according to an embodiment of the disclosure.

[0143] With reference to Fig. In operation 810, the display device 100 can control the input interface 140 to receive the power-off command for the display device 100. Operation 810 can be derived from operation 710. Fig. 7 correspond.

[0144] For example, the main module 130, which is powered by the operating voltage, can control the input interface 140 to receive the power-off command for the display device 100. Based on receiving the power-off command for the display device 100, the main module 130 can store the current operating state unchanged in its memory.

[0145] In addition, for example, the controller 121, which is operated with the standby voltage, can control the input interface 140 to receive the switch-off command for the display device 100.

[0146] In operation 820, the main module 130 can output the power control signal PS_ON as a switch-off signal to the controller 121. For example, the main module 130 can output the power control signal PS_ON to the controller 121 via its at least one processor as a switch-off signal for the display device 100 to switch from normal mode to standby mode. If the power control signal PS_ON is received as a switch-off signal, the controller 121 can perform operations 830, 840, and 850 to minimize and / or reduce standby power consumption.

[0147] In one embodiment of the disclosure, process 820 can be omitted if the controller 121 receives the switch-off command from the input interface 140.

[0148] In operation 830, the controller 121 can output the first switch control signal SW1 based on the switch-off command to open the first switch 160, which supplies the operating voltage for the operation of the main module 130 to the main module 130. The first switch control signal SW1 can be a signal to switch off the first switch 160.

[0149] For example, the controller 121 can provide the first switch control signal SW1 as a switch-off signal for the first switch 160 to block the supply of operating power to the main module 130. Thus, the controller 121 can, for example, prevent the output voltage generated by the trans-circuit 123 from being supplied to the main module 130. Accordingly, the power consumption in standby mode can be minimized and / or reduced by operating the main module 130.

[0150] In operation 840, the controller 121, based on the output of the first switch control signal SW1, can output the second switch control signal SW2 to open the second switch 170, which is connected between the external power source 10 and the power supply 110, in order to generate power from the external power source 10 to supply the display device 100. The second switch control signal SW2 can be a signal to turn off the second switch 170.

[0151] For example, the controller 121 can provide the second switch control signal SW2 as a switch-off signal to the second switch 170 in order to block the supply of external power from the external power source 10 to the power supply 110. Accordingly, the power consumption in standby mode can be minimized and / or reduced by operating the power supply 110.

[0152] In operation 850, the controller 121 can output a control signal to switch off the feedback circuit 320. The controller 121 can block the operating voltage to the feedback circuit 320 to reduce standby power consumption in standby mode.

[0153] If the output voltage from the trans-circuit 123 is outside a preset voltage range, the feedback circuit 320 can output a feedback signal to the trans-control 310. For example, if the output voltage of the trans-circuit 123 differs from the operating voltage of the main module 130, the feedback circuit 320 can output a feedback signal to the trans-control 310. For example, the control 310 can interrupt the operation of the feedback circuit 320, which identifies whether the output voltage is equal to the operating voltage of the main module 130.

[0154] For example, the controller 121 can output the third switch control signal SW3 to the third switch 330 to open the third switch 330, which then supplies the operating voltage to the feedback circuit 320. The third switch control signal SW3 can also be a signal to turn off the third switch 330.

[0155] When the feedback circuit 320 is switched off, the trans-control 310 can be operated in a burst mode. For example, the control 310 can increase standby power efficiency by reducing the on / off switching frequency of the switch 540 per unit of time according to the burst mode.

[0156] In one embodiment of the disclosure, the display device 100 can control components other than the input interface 140 and the controller 121 to be switched off in standby mode. For example, the display device 100 can switch off the components of the power supply 110, the main module 130, and the feedback circuit 320 via the controller 121. Thus, for example, the power supply 110, the main module 130, and the feedback circuit 320 can be switched off in standby mode. The controller 121 can identify whether the switch-on command for the display device 100 in standby mode is received by the IR receiver 140, thereby minimizing / reducing the standby power consumed for the operation of the power supply 110 and / or the main module 130.

[0157] Since the controller 121 does not provide the output voltage Vout generated by the trans-circuit 123 to the main module 130 in standby mode, the controller 121 can also interrupt the operation of the feedback circuit 320, which identifies whether the output voltage Vout equals a preset voltage, e.g., the operating voltage of the main module 130. Accordingly, the display device 100 can minimize and / or reduce the standby power consumed by the operation of the feedback circuit 320.

[0158] In standby mode, the controller 121 can repeatedly output the fourth switch control signal SW4 as an off signal to open the fourth switch 410, which supplies power to operate the input interface 140, and the fourth switch control signal SW4 as an on signal to close the fourth switch 410. Therefore, the controller 121 can control the input interface 140 to repeatedly turn it on and off. This repeated on / off operation of the input interface 140 consumes less power than if the input interface 140 remained constantly on, thus minimizing / reducing the standby power consumption of the display device 100 in standby mode.

[0159] A series of procedures in which the display device 100 is operated in normal mode in response to receiving the power-on command in standby mode is now described with reference to the Fig. 9, Fig. 10 and Fig. 11 described in more detail.

[0160] Fig. Figure 9 is a flowchart illustrating an exemplary process of a display device for switching to a normal mode from a standby mode based on the receipt of a power-on command according to an embodiment of the disclosure.

[0161] With reference to Fig. In process 910, the controller 121 can receive a switch-on command for the display device 100 via the input interface 140. Since the main module 130 is switched off and not operating in standby mode, for example, the main module 130 cannot receive the switch-off command via the input interface 140.

[0162] For example, the power supply 110, the main module 130, and the feedback circuit 320 can be switched off in standby mode. Conversely, the controller 121 and the input interface 140 can be switched on in standby mode. When switching from standby mode to normal mode, the power supply 110, the main module 130, and the feedback circuit 320 can be switched to the on state.

[0163] In operation 920, the controller 121 can output the second switch control signal SW2 to close the second switch 170, which is connected between the external power source 10 and the power supply 110. The controller 121 can provide the second switch control signal SW2 as an on signal for the second switch 170. The opened second switch 170 can supply the external power from the external power source 10 to the power supply 110. The controller 121 can control the external power from the external power source 10 that is supplied to the power supply 110. The second switch 170 could, for example, be a relay that blocks voltage to reduce the standby power consumption of the power supply 110 in standby mode.

[0164] In process 930, the controller 121 can output the first switch control signal SW1 to close the first switch 160, which supplies the operating voltage to the main module 130. The controller 121 can provide the first switch control signal SW1 as an on signal for the first switch 160. The switched-on second switch 160 can supply the operating voltage to the main module 130. The controller 121 can control the operating power supplied to the main module 130. The first switch 160 could, for example, be a load switch that blocks unused voltage to reduce standby power consumption in standby mode.

[0165] In one embodiment of the disclosure, the display device 100 can generate the operating voltage for the main module 130 from the external power source 10 via the trans-circuit 123. The operating voltage can, for example, be equal to the output voltage Vout generated by the trans-circuit 123 of the power supply 120. Furthermore, the display device 100 can generate a standby voltage based on the operating voltage via a regulator (e.g., the LDO regulator 124), which is lower than the operating voltage. In one embodiment of the disclosure, the controller 121 can be operated with the standby voltage. The standby power supply 120, which includes the trans-circuit 123 and the LDO regulator 124, can be operated as a configuration separate from the power supply 110, generating a voltage from the external power supply 10 to operate the display device 100.

[0166] Fig. Figure 10 is a flowchart illustrating an exemplary process of a display device for switching to a normal mode from a standby mode based on the receipt of a power-on command according to an embodiment of the disclosure.

[0167] With reference to Fig. In operation 1010, the controller 121 can receive the switch-on command for the display device 100 via the input interface 140. However, since the main module 130 is switched off and not operating in standby mode, it cannot receive the switch-off command via the input interface 140.

[0168] In operation 1020, the controller 121 can output a control signal to switch on the feedback circuit 320. If the output voltage from the trans-circuit 123 is outside the range of the preset voltage, e.g., the operating voltage of the main module 130, the switched-on feedback circuit 320 can output a feedback signal to the trans-controller 310. Based on the feedback signal, the trans-controller 310 can output a control signal to set an on / off duty cycle of the switch 540 of the trans-circuit 123. The trans-circuit 123 can generate, via the feedback circuit 320, the output voltage Vout, which has the same value as the operating voltage for the main module 130.

[0169] For example, the controller 121 can output the third switch control signal SW3 to the third switch 330 to close the third switch 330, which then supplies the operating voltage to the feedback circuit 320. The third switch control signal SW3 can be a signal to turn on the third switch 330.

[0170] In operation 1030, the controller 121 can output the second switch control signal SW2 to close the second switch 170, which is connected between the external power source 10 and the power supply 110. The second switch control signal SW2 can be a signal to turn on the second switch 170.

[0171] For example, the controller 121 can output a control signal to switch on the power supply 110. The controller 121 can provide the second switch control signal SW2 as an on signal for the second switch 170 to supply the external power from the external power source 10 to the power supply 110.

[0172] In one embodiment of the disclosure, when the display device 100 is switched from standby mode to normal mode, the controller 121 must turn on the feedback circuit 320 and then turn on the second switch 170. The coil of the second switch 170 can generate a magnetic force in response to receiving the output voltage Vout of the trans-circuit 123. The output voltage Vout of the trans-circuit 123 can deviate from the preset voltage until the feedback process of the feedback circuit 320 is complete. Therefore, if the second switch control signal is provided as a turn-on signal for the second switch 170 before the feedback process is complete, the second switch 170 may malfunction even when it is not actually turned on.

[0173] In process 1040, the controller 121 can output the first switch control signal SW1 to close the first switch 160, which supplies the operating voltage to the main module 130. The first switch control signal SW1 can be a signal to turn on the first switch 160.

[0174] For example, the controller 121 can output a control signal to switch on the main module 130. The controller 121 can provide the first switch control signal SW1 as a switch-on signal for the first switch 160 to supply the main module 130 with operating power. For example, the controller 121 can provide the output voltage generated by the trans-circuit 123 to the main module 130.

[0175] In process 1050, the controller 121 can receive the power control signal PS_ON as a switch-on signal from the main module 130, based on the output of the first switch control signal SW1. The main module 130 can output the power control signal PS_ON as a switch-on signal for the display device 100 to switch from standby mode to normal mode. For example, the display 150 can be switched on according to the power control signal PS_ON as a switch-on signal.

[0176] Fig. Figure 11 is a flowchart illustrating an exemplary process of a display device for switching to a normal mode from a standby mode based on the receipt of a power-on command according to an embodiment of the disclosure.

[0177] With reference to Fig. In operation 1110, the controller 121 can control the input interface 140 to receive the power-on command for the display device 100. The controller 121 is in standby mode and therefore cannot be controlled by the main module 130, but only by the controller 121.

[0178] The controller 121 can control the input interface 140 so that it operates in standby mode.

[0179] For example, the controller 121 can control the operating voltage, e.g., Vcc, for the operation of the input interface 140, which is to be supplied to the input interface 140. For example, the controller 121 can provide the fourth switch control signal as a switch-off signal to close the fourth switch 410 in order to supply the input interface 140 with operating power.

[0180] Furthermore, the controller 121 can, for example, supply the operating power for the operation of the input interface 140.

[0181] In process 1120, the controller 121 can receive the switch-on command for the display device 100 via the input interface 140. Process 1120 can be derived from process 1010. Fig. 10 corresponds.

[0182] In process 1130, the controller 121 can output a control signal to switch on the feedback circuit 320. Process 1130 can be followed by process 1020. Fig. 10 corresponds.

[0183] In operation 1140, the controller 121 can output the second switch control signal SW2 to close the second switch 170, which is connected between the external power source 10 and the power supply 110. Operation 1140 can be derived from operation 1030. Fig. 10 corresponds.

[0184] In process 1150, the controller 121 can output the first switch control signal SW1 to close the first switch 160, which supplies the operating voltage to the main module 130. Process 1150 can be followed by process 1040. Fig. 10 corresponds.

[0185] Fig. Figure 12 is a block diagram showing an exemplary configuration of a power supply and a standby power supply of a display device according to an embodiment of the disclosure.

[0186] With reference to Fig. 12. The power supply 110 can be connected to the main module 130 via a diode 1210 in a display device 1200.

[0187] In one embodiment of the disclosure, the power supply 110 can generate an operating voltage for operating the main module 130 and a drive voltage for driving the display 150. The power transformer 113 can regulate the DC voltage output by the PFC 112 and apply a constant-level voltage to each component, such as the main module 130 and the display 150. For example, the power transformer 113 can generate the power required to operate the display 150 (e.g., a drive voltage Vdrv). Similarly, the power transformer 113 can generate the power required to operate the main module 130 (e.g., an operating voltage).

[0188] In one embodiment of the disclosure, the main module 130 can receive operating power from the power supply 110.

[0189] In one embodiment of the disclosure, the standby power supply 120 in the display device 1200 may not generate an operating voltage that is supplied to the main module 130. Even in this case, the standby power supply 120 can be controlled such that it receives an IR signal via the IR receiver 141 in standby mode.

[0190] In one embodiment of the disclosure, in the display device 1200, the power supply 110 can generate an operating voltage to power the main module 130, and the standby power supply 120 can control the IR receiver 141, which is operated to receive the power-on command in standby mode. Accordingly, the power consumption of the controller 121 can be reduced from about 60 W to about 15 W.

[0191] In one embodiment of the disclosure, the display device 100 includes the power supply 110 for supplying the display device 100 with power from the external power source 10, the input interface 140 for receiving the turn-on command or the turn-off command for the display device 100, the main module 130, which is operated with the operating voltage, and the control unit 121, which is operated with the standby voltage.

[0192] In one embodiment of the disclosure, the controller 121 outputs the first switch control signal SW1 based on the off command to open the first switch 160, which supplies the operating voltage to the main module 130.

[0193] In one embodiment of the disclosure, the controller 121, based on the output of the first switch control signal SW1, outputs the second switch control signal SW2 to open the second switch 170, which is connected between the external power source 10 and the power supply 110.

[0194] In one embodiment of the disclosure, the display device 100 may further include the feedback circuit 320 for outputting a feedback signal when the operating voltage for the operation of the main module 130 is outside a preset range.

[0195] In one embodiment of the disclosure, the controller 121 can output the control signal SW3 to switch off the feedback circuit 320 based on the output of the second switch control signal SW2.

[0196] In one embodiment of the disclosure, the display device 100 can include the standby power supply 120 with the control 121, the trans-circuit 123 for generating the operating voltage for the main module 130 from the external power source 10 and the regulator 124 for generating a standby voltage from the operating voltage which is lower than the operating voltage.

[0197] In one embodiment of the disclosure, the controller 121 can receive the standby voltage from the regulator 124.

[0198] In one embodiment of the disclosure, the main module 130 may further include at least one processor and a memory for storing one or more instructions to be executed by the at least one processor.

[0199] In one embodiment of the disclosure, the at least one processor can control the input interface 140 to receive the power-off command for the display device 100.

[0200] In one embodiment of the disclosure, the at least one processor can output the power control signal PS_ON for the display device 100 to the controller 121 based on the power-off command in order to switch from normal mode to standby mode.

[0201] In one embodiment of the disclosure, when the controller 121 receives the power control signal PS_ON, it can output the first switch control signal SW1 and / or the second switch control signal SW2.

[0202] In one embodiment of the disclosure, the controller 121 can, based on the switch-off command for the display device 100, repeatedly output the switch control signal SW4 as a switch-off signal to open the switch 410, which supplies the operating power to operate the input interface 140, and the switch control signal SW4 as a switch-on signal to close the switch 410.

[0203] In one embodiment of the disclosure, the controller 121 can receive the switch-on command for the display device 100 via the input interface 140.

[0204] In one embodiment of the disclosure, the controller 121 can, based on the switch-on command, output the second switch control signal SW2 to close the second switch 170 in order to supply the external power from the external power source 10 to the power supply 110.

[0205] In one embodiment of the disclosure, the controller 121 can, based on the output of the second switch control signal SW2, output the first switch control signal SW1 to close the first switch 160 in order to supply the operating voltage to the main module 130.

[0206] In one embodiment of the disclosure, the controller 121 can output the control signal SW3 based on the switch-on command in order to switch on the feedback circuit 320.

[0207] In one embodiment of the disclosure, the controller 121 can output the second switch control signal SW2 based on the output of the control signal SW3.

[0208] In one embodiment of the disclosure, the controller 121 can receive the power control signal PS_ON based on the output of the first switch control signal SW1 from the main module 130 in order to switch the display device 100 from standby mode to normal mode.

[0209] In one embodiment of the disclosure, the control unit 121 can provide the first switch control signal SW1, from which a switch-on time is gradually increased, for the first switch 160.

[0210] In one embodiment of the disclosure, the controller 121 can receive a first switch-on command for the display device 100 via the input interface 140.

[0211] In one embodiment of the disclosure, the controller 121 can, based on the first power-on command, output the switch control signal SW4 to close the switch 410 in order to supply power for the operation of the input interface 140.

[0212] In one embodiment of the disclosure, the controller 121 can output the second switch control signal SW2 and / or the first switch control signal SW1 based on receiving a second switch-on command for the display device 100 from the input interface 140.

[0213] In one embodiment of the disclosure, the controller 121 can control the input interface 140 so that it is operated based on the standby voltage.

[0214] According to an embodiment of the disclosure, a method for operating the display device includes: controlling, by a main module powered by an operating voltage, an input interface to receive a power-off command for the display device based on the power-off command; outputting, by the controller powered by a standby voltage, the first switch control signal to open the first switch to supply the operating voltage to the main module; and, based on the output of the first switch control signal, outputting, by the controller, the second switch control signal to open the second switch, which is connected between the external power source and the power supply to generate power to be supplied to the display device from the external power source.

[0215] In one embodiment of the disclosure, the method may further include, based on the output of the second switch control signal, outputting, by the control, a control signal to switch off the feedback circuit to output a feedback signal when the operating voltage for operating the main module is outside a preset range.

[0216] In one embodiment of the disclosure, the method may further include generating an operating voltage for the main module from the external power source, generating a standby voltage lower than the operating voltage from the operating voltage, and receiving the standby voltage by the controller.

[0217] In one embodiment of the disclosure, the method can further include controlling the input interface, by the main module, so that it receives a power-off command for the display device based on the power-off command, outputting, by the main module, a power control signal to the controller to switch the display device from normal mode to standby mode, and, upon receiving a power control signal, outputting, by the controller, the first switch control signal and / or the second switch control signal.

[0218] In one embodiment of the disclosure, the method may further include, based on the power-off command for the display device, repeated output by the controller of a switch control signal as a power-off signal to open the switch to release operating power to operate the input interface, and of the switch control signal as a power-on signal to close the switch.

[0219] In one embodiment of the disclosure, the method may further include receiving, by the controller, a power-on command for the display device via the input interface, based on the power-on command; outputting, by the controller, the second switch control signal to close the second switch in order to supply external power from the external power source to the power supply; and, based on the output of the second switch control signal, outputting, by the controller, the first switch control signal to close the first switch in order to supply the operating voltage to the main module.

[0220] In one embodiment of the disclosure, the method may further include, based on the fact that the operating voltage for operating the main module is outside a preset range, outputting, by the controller, the control signal to switch on the feedback circuit to output a feedback signal, and, based on the output of the control signal, outputting, by the controller, the second switch control signal.

[0221] In one embodiment of the disclosure, the method may further include, based on the output of the first switch control signal, receiving, by the controller, from the main module, the power control signal in order to switch the display device from standby mode to normal mode.

[0222] In one embodiment of the disclosure, the method may further include operating the input interface so that it is operated based on the standby voltage.

[0223] The machine-readable storage medium can be provided in the form of a non-transient storage medium. The term "non-transient storage medium" can refer, for example, to a tangible device that does not contain a signal, such as electromagnetic waves, and does not distinguish between the semi-permanent and temporary storage of data on the storage medium. The non-transient storage medium can, for example, include a buffer that temporarily stores data.

[0224] In one embodiment of the disclosure, the aforementioned method may be provided in a computer program product. The computer program product may be a commercial product that can be traded between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a compact disc read-only memory - CD-ROM) or distributed directly between two user devices (e.g., smartphones) or online (e.g., by downloading or uploading). In the case of online distribution, at least a part of the computer program product (e.g., a downloadable app) may be stored, at least temporarily, in or arbitrarily created in a storage medium that can be read by a device such as a manufacturer's server, an application storage server, or a relay server.

Claims

[1] Display device (100), comprising: a power supply (110) configured to supply the display device (100) with power from an external power source (10); an input interface (140) comprising a circuit configured to receive a power-on command or a power-off command for the display device; a main module (130) comprising a circuit configured to operate according to an operating voltage; and a controller (121) comprising a control circuit configured to operate on a standby voltage, where the controller (121) is configured to: Outputting a first switch control signal (SW1) to open a first switch (160) to supply the operating voltage to the main module (130), based on the power-off command, and based on the output of the first switch control signal (SW1), output of a second switch control signal (SW2) to open a second switch (170) which is connected between the external power source (10) and the power supply (110). [2] Display device (100) according to claim 1, further comprising: a feedback circuit (320) configured to output a feedback signal based on the operating voltage for the main module (130) which lies outside a specified range, wherein the controller (121) is configured to output a control signal (SW3) to switch off the feedback circuit 320 based on the output of the second switch control signal (SW2). [3] Display device (100) according to claim 1 or 2, wherein the display device (100) further comprises: a trans-circuit (123) configured to generate the operating voltage for the main module (130) from the external power source (10); and a standby power supply (120) which includes a regulator (124) configured to generate the standby voltage from the operating voltage, which is lower than the operating voltage, wherein the controller (121) is configured to receive the standby voltage from the regulator (124). [4] Display device (100) according to any one of claims 1 to 3, wherein: the main module (130) includes at least one processor comprising a processing circuit and a memory comprising one or more instructions to be executed by the at least one processor, and At least one processor, individually and / or jointly, is configured to: Controlling the input interface (140) to receive a power-off command for the display device (100), and based on the power-off command, output of a power control signal (PS_ON) to switch the display device (100) from a normal mode to a standby mode to the controller (121), and The controller (121) is configured based on the receipt of the power control signal (PS_ON) to output at least one of the first switch control signal (SW1) or the second switch control signal (SW2). [5] Display device (100) according to any one of claims 1 to 4, wherein the controller (121) is configured to repeatedly output a switch control signal (SW4) as a switch-off signal to open a switch (410) to supply operating power for operating the input interface (140), based on the switch-off command for the display device (100), and the switch control signal (SW4) as a switch-on signal to close the switch (410). [6] Display device (100) according to any one of claims 1 to 5, wherein the control (121) is configured to: Receiving the power-on command for the display device (100) via the input interface (140), based on the power-on command, output of the second switch control signal (SW2) to close the second switch (170) to supply power from the external power source (10) to the power supply (110), and based on the output of the second switch control signal (SW2), output of the first switch control signal (SW1) to close the first switch (160) to supply the operating voltage to the main module (130). [7] Display device (100) according to claim 6, further comprising: a feedback circuit (320) connected to the controller (121) and configured to output a feedback signal based on an operating voltage for operating the main module (130) that is outside a specified range, where the controller (121) is configured to: based on the power-on command, output of a control signal (SW3) to turn on the feedback circuit (320), and based on the output of the control signal (SW3), output of the second switch control signal (SW2). [8] Display device (100) according to claim 6 or 7, wherein the controller (121) is configured to receive a power control signal (PS_ON) based on the output of the first switch control signal (SW1) from the main module (130) in order to switch the display device (100) from a standby mode to a normal mode. [9] Display device (100) according to one of claims 6 to 8, wherein the control (121) is configured to provide the first switch (160) with the first switch control signal (SW1) from which a switch-on time is gradually increased. [10] Display device (100) according to any one of claims 6 to 9, wherein the control (121) is configured to: Receiving, from the input interface (140), a first power-on command for the display device (100), Output a switch control signal (SW4) to close a switch (410) to supply power to operate the input interface (140), based on the initial power-on command, and based on receiving a second power-on command for the display device (100) from the input interface (140), outputting the second switch control signal (SW2) or the first switch control signal (SW1). [11] Display device (100) according to any one of claims 1 to 10, wherein the controller (121) is configured to control the input interface (140) so that it is operated based on the standby voltage. [12] Method for operating a display device (100), the method comprising: Control, by means of a main module (130) which is operated with an operating voltage, an input interface (140) to receive a switch-off command for the display device (100); based on the power-off command, output, by a controller (121) powered by a standby voltage, a first switch control signal (SW1) to open a first switch (160) to supply the operating voltage to the main module (130); and Output, by the control (121), of a second switch control signal (SW2) to open a second switch (170) which is connected between an external power source (10) and a power supply (110) to generate power from the external power source (10) to supply to the display device (100), based on the output of the first switch control signal (SW1). [13] The method of claim 12, further comprising: based on the output of the second switch control signal (SW2), output, by the controller (121), of a control signal (SW3) to switch off a feedback circuit (320) to output a feedback signal, based on the fact that an operating voltage for operating the main module (130) is outside a specified range. [14] Method according to claim 12 or 13, further comprising: Generating an operating voltage for the main module (130) from the external power source (10); Generate, from the operating voltage, a standby voltage that is lower than the operating voltage; and Received, through the control (121), the standby voltage. [15] Method according to any one of claims 12 to 14, further comprising: Control, through the main module (130), the input interface (140) to receive a power-off command for the display device (100); based on the power-off command, output by the main module (130), a power control signal (PS_ON) to switch the display device (100) from a normal mode to a standby mode to the controller (121); and based on receiving the power control signal (PS_ON), ​​output by the controller (121) at least one of the first switch control signal (SW1) or the second switch control signal (SW2).

Images