Display device and operation method thereof

Abstract

A display device and an operation method thereof are provided. The display device comprises: a power supply for generating power supplied to the display device from an external power source; an input interface including a circuit configured to receive a turn-on command or a turn-off command for the display device; a main module including a circuit configured to operate according to an operating voltage; and a controller including a circuit configured to operate according to a standby voltage, the input interface receiving a turn-on command or a turn-off command for the display device, the main module operating according to an operating voltage and controlling the input interface to receive the turn-off command, and the controller operating according to a standby voltage, wherein the controller outputs a first switch control signal so as to open a first switch transmitting the operating voltage to the main module on the basis of the turn-off command, and outputs a second switch control signal so as to open a second switch connected between the external power source and the power supply in response to the output of the first switch control signal.

Description

Display device and method of operation thereof

[0001] The present invention relates to a display device and an operating method thereof according to one embodiment, and more particularly, to a display device including a power supply and an operating method thereof.

[0002] Typically, display devices such as TVs are equipped with a power supply, such as a switched mode power supply (SMPS), to supply operating power to each component of the display device. The power supply receives AC power, which is a commercial power source, converts it into an operating voltage level required by the power source, and supplies it to the power source.

[0003] Display devices can operate in standby mode to minimize power consumption when not in use. The power consumed in this standby mode is called standby power. For example, even when the display device is not in use, the minimal circuitry required to receive user commands, such as turn-on commands, continues to operate, consuming power for this circuitry operation.

[0004] Recently, research on methods to minimize this standby power is being actively conducted.

[0005] A display device according to one embodiment of the present disclosure includes a power supply for supplying power from an external power source to the display device, an input interface including a circuit configured to receive a turn-on command or a turn-off command for the display device, a main module including a circuit configured to operate according to an operating voltage, and a controller including a circuit configured to operate according to a standby voltage.

[0006] A controller according to one embodiment of the present disclosure outputs a first switch control signal to open a first switch that transmits an operating voltage to a main module based on a turn-off command.

[0007] According to one embodiment of the present disclosure, a controller outputs a second switch control signal to open a second switch connected between an external power source and a power supply in response to outputting a first switch control signal.

[0008] A method of operating a display device according to one embodiment of the present disclosure includes a step of controlling an input interface so that a main module operating according to an operating voltage receives a turn-off command for the display device, a step of outputting a first switch control signal so that a controller operating according to a standby voltage opens a first switch that transmits the operating voltage to the main module based on the turn-off command, and a step of outputting a second switch control signal so that the controller opens a second switch connected between an external power source and a power supply that generates power supplied to the display device from the external power source in response to outputting the first switch control signal.

[0009] One embodiment, other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0010] FIG. 1 is a schematic block diagram showing the configuration of a display device according to one embodiment.

[0011] FIG. 2 is a block diagram showing the configuration of a power supply and a standby power supply of a display device according to one embodiment.

[0012] FIG. 3 is a block diagram showing the configuration of a power supply and a standby power supply of a display device according to one embodiment.

[0013] FIG. 4 is a block diagram showing the configuration of a power supply and a standby power supply of a display device according to one embodiment.

[0014] Fig. 5 is a circuit diagram showing the configuration of a display device according to one embodiment.

[0015] FIG. 6 is a timing diagram for explaining the timing of each signal in normal mode and standby mode of a display device according to one embodiment.

[0016] FIG. 7 is a flowchart illustrating an operation of switching from normal mode to standby mode upon receiving a turn-off command by a display device according to one embodiment.

[0017] FIG. 8 is a flowchart illustrating an operation of switching from normal mode to standby mode upon receiving a turn-off command by a display device according to one embodiment.

[0018] FIG. 9 is a flowchart illustrating an operation of a display device switching from standby mode to normal mode upon receiving a turn-on command according to one embodiment.

[0019] FIG. 10 is a flowchart illustrating an operation of a display device switching from standby mode to normal mode upon receiving a turn-on command according to one embodiment.

[0020] FIG. 11 is a flowchart illustrating an operation of a display device switching from standby mode to normal mode upon receiving a turn-on command according to one embodiment.

[0021] FIG. 12 is a block diagram showing the configuration of a power supply and a standby power supply of a display device according to one embodiment.

[0022] The terms used in this disclosure will be briefly explained, and the present invention will be described in detail.

[0023] The terms used in this invention have been selected from widely used, current terms, taking into account the functions of the invention. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, in which case their meanings will be described in detail in the relevant description of the invention. Therefore, the terms used in this invention should not be defined simply as names, but rather based on their inherent meanings and the overall content of the invention.

[0024] When a part of the specification is said to "include" a component, this does not exclude other components, but rather implies the inclusion of other components, unless otherwise specifically stated. Furthermore, terms such as "part," "module," etc., used throughout the specification refer to a unit that processes at least one function or operation, which may be implemented in hardware, software, or a combination of hardware and software.

[0025] Below, with reference to the attached drawings, embodiments of the present invention are described in detail so that those skilled in the art can easily implement the present invention. However, the present invention can be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description have been omitted to clearly explain the present invention, and similar parts have been designated with similar reference numerals throughout the specification.

[0026] In the embodiments of this specification, the term “user” means a person who controls a system, function or operation, and may include a developer, administrator or installer.

[0027] In the embodiments of the present specification, the term “standby mode” may mean a state in which the display screen is turned off and can receive a turn-on command from a user when the display device is in a power off state.

[0028] In the embodiments of this specification, the term “normal mode” has the opposite meaning of “standby mode” and may mean a state in which the display screen is turned on and a processor such as a CPU is operating when the display device is in a power-on state.

[0029] FIG. 1 is a schematic block diagram showing the configuration of a display device according to one embodiment.

[0030] Referring to FIG. 1, a display device (100) according to one embodiment of the present disclosure may include a power supply (110), a standby power supply (120) (e.g., including a circuit) having a controller (121), a main module (130) (e.g., including a circuit), and an input interface (140) (e.g., including an interface circuit).

[0031] The display device (100) may include various types of electronic devices capable of receiving and outputting content, such as televisions such as network TVs, smart TVs, Internet TVs, web TVs, and IPTVs, computers such as desktops, laptops, and tablets, and various smart devices such as smartphones, cellular phones, game players, music players, video players, medical equipment, and home appliances.

[0032] In one embodiment of the present disclosure, the display device (100) may operate in a normal mode when turned on. For example, in the normal mode, the power supply (110), the main module (130), and the input interface (140) of the display device (100) may operate. For example, in the normal mode, the display device (100) may supply operating power for the main module (130) and the input interface (140) to operate through the power supply (110). Alternatively, for example, in the normal mode, the standby power supply (120) of the display device (100) may operate, and the display device (100) may supply operating power for the main module (130) and the input interface (140) to operate through the standby power supply (120).

[0033] In one embodiment of the present disclosure, the display device (100) may operate in a standby mode to minimize or reduce power consumption while not in use when turned off. In the standby mode, the display device (100) may operate only the minimum circuitry required to operate the input interface (140) for receiving a user's turn-on command. For example, in the standby mode, the power supply (110) and the main module (130) of the display device (100) may not operate. For example, in the standby mode, the standby power supply (120), the controller (121), and the input interface (140) of the display device (100) may operate. For example, in standby mode, the display device (100) can generate a standby voltage to operate the controller (121) through the standby power supply (120), cut off the supply of operating power to the power supply (110) and the main module (130) through the controller (121), and control the input interface (140) to operate.

[0034] In one embodiment of the present disclosure, when the display device (100) receives a turn-off command from the input interface (140), the display device (100) may perform a series of operations for operating in a standby mode. For example, the display device (100) may perform an operation for switching from a normal mode to a standby mode.

[0035] In one embodiment of the present disclosure, when the display device (100) receives a turn-on command from the input interface (140), the display device (100) may perform a series of operations for operating in normal mode. For example, the display device (100) may perform an operation for switching from standby mode to normal mode.

[0036] Below, each component constituting the display device (100) is described.

[0037] The display device (100) can supply operating power to the components of the display device (100) through a power supply (110). The display device (100) can supply operating power to the input interface (140) in standby mode through a standby power supply (120).

[0038] The power supply (110) can generate power to be supplied to the display device (100) from an external power source (10). The power supply (110) can receive AC power, which is an external power source (10), convert it into power at a level required for the operation of each component, such as a main module (130), an input interface (140), and a display (150 in FIG. 2), and supply the converted power to the corresponding components. For example, the power supply (110) can include a converter implemented as an insulated SMPS (switched mode power supply).

[0039] The power supply (110) can operate in the normal mode of the display device (100). The power supply (110) does not operate in the standby mode of the display device (100), and the performance of all functions may be stopped.

[0040] The standby power supply (120) can generate DC power from an external power source (10). For example, the standby power supply (120) can generate an operating voltage for operating the main module (130). For example, the standby power supply (120) can convert the operating voltage to generate a standby voltage for operating the controller (121) of the display device (100). The standby power supply (120) can operate the main module (130) according to the operating voltage and operate the controller (121) according to the standby voltage.

[0041] The standby power supply (120) can operate in the standby mode of the display device (100). The standby power supply (120) can operate in the normal mode of the display device (100) or may not operate.

[0042] The controller (121) may include various circuits. The controller (121) operates according to the standby voltage generated from the standby power supply (120) and may control the input interface (140) to operate. For example, the controller (121) may control the input interface (140) to operate to receive a turn-on command in the standby mode of the display device (100).

[0043] When the display device (100) receives a turn-off command, the display device (100) can execute a pre-stored program through the controller (121) to operate the display device (100) in standby mode. For example, the controller (121) can control, based on the turn-off command, unused components not to operate in order to minimize or reduce standby power and block leakage current. For example, the controller (121) can control, based on the turn-off command, to cut off power supply to the power supply (110) and the main module (130). By cutting off power supply to the power supply (110) and the main module (130), the controller (121) can minimize or reduce standby power consumed by the power supply (110) and the main module (130) in standby mode, and can minimize or reduce leakage current.

[0044] When the display device (100) receives a turn-on command, the display device (100) can execute a pre-stored program through the controller (121) to operate the display device (100) from standby mode to normal mode again. For example, the controller (121) can control to supply power to the power supply (110) and the main module (130) based on the turn-on command.

[0045] The controller (121) may operate in the standby mode of the display device (100). The controller (121) may or may not operate in the normal mode of the display device (100).

[0046] The main module (130) may include various circuits and control the overall operation of the display device (100). The main module (130) may receive and process an image signal and display an image based thereon. The main module (130) may be a software configuration, a hardware configuration, or a combination of hardware and software configurations. When the main module (130) includes a hardware configuration, the main module (130) may include a printed circuit board. The main module (130) may include at least one processor and a memory. For example, at least one processor may include various processing circuits and / or multiple processors. For example, the term "processor" as used herein, including in the claims, may include various processing circuits, including at least one processor. One or more processors in at least one processor may be configured to individually and / or collectively perform various functions described herein in a distributed manner. As used herein, a processor, at least one processor, or more than one processor may be configured to perform various functions. However, these terms encompass, for example but not limited to, situations where one processor performs some of the functions and other processor(s) perform other parts of the functions, and situations where a single processor can perform all of the functions. Furthermore, at least one processor may comprise a combination of processors that perform various functions of the disclosed functions in a distributed manner. At least one processor may execute program instructions to achieve or perform various functions. For example, at least one processor may execute various software programs or instructions stored in memory to perform various operations.The memory can store various software programs (or applications) for the display device (100) to operate, data for the operation of the display device (100), and instructions.

[0047] The main module (130) can operate according to the operating power. For example, the main module (130) can receive the operating power from the standby power supply (120). Alternatively, for example, the main module (130) can receive the operating power from the power supply (110). The main module (130) can control the input interface (140) in the normal mode. For example, the main module (130) can control the input interface (140) to receive a turn-off command, a channel control command, a volume control command, etc. in the normal mode. Meanwhile, in the normal mode, the turn-off command for the display device (100) can be received from the main module (130) or the controller (121).

[0048] The main module (130) does not operate in standby mode, and the performance of all functions may be stopped. For example, the controller (121) may block the first switch (160) for transmitting operating power to the main module (130) in standby mode. Alternatively, for example, the controller (121) may stop the operation of the power supply (110) for transmitting operating power to the main module (130) in standby mode. In addition, since the controller (121) controls the input interface (140) to operate in standby mode, there is no need to supply operating power to the main module (130). Accordingly, since the main module (130) does not operate in standby mode, standby power resulting from the switching operation of the main module (130) can be minimized or reduced.

[0049] The input interface (140) may include various interface circuits and may receive commands to be used in the display device (100) from an external source (e.g., a user). The input interface (140) may include, for example, a microphone for receiving a user's voice, a camera for acquiring an image corresponding to the user's motion, and an IR receiver for receiving an IR signal corresponding to the user's input. For example, the input interface (140) may receive a control command including a turn-on command or a turn-off command for the display device (100) from a remote control device (e.g., a remote control) via a short-range wireless communication interface such as Bluetooth, NFC, or an IR receiver. For example, the input interface (140) may transmit the control command to the processor of the main module (130). Additionally, for example, the input interface (140) may also directly transmit the control command to the controller (121).

[0050] The input interface (140) can operate in the standby mode of the display device (100). For example, in the standby mode, the input interface (140) can transmit the received control command to the controller (121) instead of transmitting it to the processor of the main module (130).

[0051] The input interface (140) can operate in the normal mode of the display device (100). For example, in the normal mode, the input interface (140) can transmit the received control command to the processor of the main module (130) and / or to the controller (121).

[0052] A display device (100) according to one embodiment may further include a first switch (160) and a second switch (170).

[0053] The first switch (160) may be located between the output terminal of the circuit that generates the operating voltage of the main module (130) in the standby power supply (120) and the main module (130). For example, the operating voltage of the main module (130) may be generated through the transformer circuit (123) of FIG. 2. The first switch (160) may transmit or block the operating voltage for operating the main module (130) to the main module (130) based on the first switch control signal received from the controller (121).

[0054] The second switch (170) may be located between the external power source (10) and the power supply (110). The second switch (170) may transmit or cut off AC power for operating the power supply (110) to the power supply (110) based on a second switch control signal received from the controller (121). The display device (100) according to one embodiment may minimize or reduce standby power by controlling the first switch (160) and the second switch (170) through the controller (121).

[0055] According to one embodiment of the present disclosure, the controller (121) can control not to transmit an operating voltage for operating the main module (130) to the main module (130) based on a turn-off command. For example, the controller (121) can output a first switch control signal so that a first switch (160) located between an output terminal of the operating voltage and the main module (130) is opened. The first switch control signal may be an off signal of the first switch (160). Accordingly, power consumption due to the operation of the main module (130) can be minimized or reduced.

[0056] According to one embodiment of the present disclosure, the controller (121) can control the power supply (110) to cut off the supply of the external power (10) based on a turn-off command. For example, the controller (121) can output a second switch control signal so that the second switch (170) located between the power supply (110) and the external power (10) is opened. The second switch control signal may be an off signal of the second switch (170). Accordingly, power consumption due to the operation of the power supply (110) can be minimized or reduced.

[0057] According to one embodiment of the present disclosure, the controller (121) may output a second switch control signal to short-circuit the second switch (170) to connect the power supply (110) and the external power source (10) based on a turn-on command. The second switch control signal may be an on signal of the second switch (170).

[0058] According to one embodiment of the present disclosure, the controller (121) may output a first switch control signal to short-circuit the first switch (160) that transmits operating power to the main module (130) based on a turn-on command. The first switch control signal may be an on signal of the first switch (160).

[0059] A display device (100) according to one embodiment of the present disclosure may generate a standby voltage in a standby mode, operate a controller (121) through the standby voltage, and operate an input interface (140) for receiving a turn-off command. The display device (100) may operate only the input interface (140) and the controller (121) in the standby mode, and may block the supply of power for the operation of the remaining circuits, such as the power supply (110) or the main module (130). Since the power supply (110) does not operate in the standby mode, power consumption due to power conversion can be minimized or reduced. In addition, since the main module (130) does not operate in the standby mode, power consumption for controlling the input interface (140) can be minimized or reduced.

[0060] FIG. 2 is a block diagram showing the configuration of a power supply and a standby power supply of a display device according to one embodiment.

[0061] Referring to FIG. 2, a display device (100) according to one embodiment may include a power supply (110), a standby power supply (120), a main module (130), an IR receiver (141) (e.g., including an IR receiving circuit), a display (150), a first switch (160), and a second switch (170).

[0062] A power supply (110) according to one embodiment may include a first rectifier (111), a power factor regulator (112), a power transformer (113), and a display driver (114).

[0063] The power supply (110) can receive AC power from an external power source (10). The power supply (110) can convert the AC power received from the external power source (10) into DC power. The power supply (110) can supply the power required for the display (150).

[0064] The first rectifier (111) can rectify power received from an external power source (10). The first rectifier (111) can convert the received AC power into DC power. For example, the first rectifier (111) can supply voltage or current in one direction. For example, the first rectifier (111) can be implemented as a half-wave or full-wave circuit, such as a bridge diode, for rectification.

[0065] A power factor controller (PFC) (112) can adjust the power factor of the DC power converted into DC by the first rectifier (111) and output a DC voltage with an adjusted power factor. The power factor controller (112) can minimize or reduce reactive power by correcting the phase and shape of the DC power input from the first rectifier (111). For example, the power factor controller (112) can control the converter to output a DC voltage with an improved power factor. For example, the DC voltage may be 390 V, but is not limited thereto.

[0066] The power transformer (113) can supply a constant level of voltage to each component, such as the display (150), by adjusting the DC voltage output from the power factor regulator (112). The power transformer (113) includes an insulated converter, and can include a transformer whose primary side (input side) and secondary side (output side) are insulated. For example, when a current change occurs in the primary coil of the primary side of the power transformer (113), an induced electromotive force may be generated in the secondary coil of the secondary side due to a change in magnetic flux, causing an induced current to flow. For example, the power transformer (113) can generate power (e.g., a driving voltage (Vdrv)) required for the display (150) to operate. The power transformer (113) can be implemented as, for example, a DC-DC LLC (Local Link Converter), but is not limited thereto.

[0067] The display driver (114) can supply the driving voltage (Vdrv) required for the display (150) to display an image (or video image).

[0068] The display (150) can display an image (or a video image). For example, the display (150) can display an image based on received image information. The image information may be stored, for example, in the internal memory of the main module (130) or received from an external device. The display (150) may be composed of a plurality of pixels including light emitting diodes (LEDs), organic light emitting diodes (OLEDs), etc. The display (150) can operate based on a driving voltage (Vdrv).

[0069] A standby power supply (120) according to one embodiment may include a second rectifier (122), a transformer circuit (123), an LDO regulator (Low Dropout Regulator) (124), and a controller (121). In the present disclosure, each of the first switch (160) and the second switch (170) may be a component included in the standby power supply (120), or may be implemented as a separate component from the standby power supply (120).

[0070] The standby power supply (120) can receive AC power from an 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 the operating voltage required for the main module (130). The standby power supply (120) can supply the standby voltage (Vstby) required for the controller (121).

[0071] The second rectifier (122) can rectify power received from an external power source (10). The second rectifier (122) can convert the received AC power into DC power. For example, the second rectifier (122) can supply voltage or current in one direction. For example, the second rectifier (122) can be implemented as a half-wave or full-wave circuit, such as a bridge diode, for rectification.

[0072] The transformer circuit (123) can supply a constant level of voltage to each component, such as the controller (121) and the main module (130), by controlling the direct current power output from the second rectifier (122). The transformer circuit (123) may include an insulated converter and a transformer whose primary side (input side) and secondary side (output side) are insulated. For example, when a current change occurs in the primary coil of the primary side of the transformer circuit (123), an induced electromotive force may be generated in the secondary coil of the secondary side due to a change in magnetic flux, causing an induced current to flow. For example, the transformer circuit (123) can induce a voltage applied from the primary side to the secondary side and output it. For example, the transformer circuit (123) can rectify the voltage output from the transformer circuit (123) using a diode and a capacitor connected to the secondary side, and output a voltage of the same magnitude as a preset voltage. For example, the transformer circuit (123) can output an output voltage (Vout) having the same magnitude as the operating voltage of the main module (130). For example, the preset voltage may be 13 V, but is not limited thereto. For example, the output voltage (Vout) may be 13 V, higher than 13 V, or lower than 13 V. For example, the transformer circuit (123) can generate a standby voltage (Vstby) to be provided to the controller (121) through the LDO regulator (124). The transformer circuit (123) can be implemented as, for example, a flyback converter, but is not limited thereto.

[0073] The LDO regulator (124) may be a linear regulator that operates at a low input-output potential difference. The LDO regulator (124) may generate an output voltage lower than the input voltage. For example, the LDO regulator (124) may output a standby voltage (Vstby) by taking the output voltage (Vout) of the transformer circuit (123) as input. For example, the LDO regulator (124) may generate a standby voltage (Vstby) lower than the output voltage (Vout). For example, the output voltage (Vout) may be 13 V, which is the same as the operating voltage of the main module (130), and the standby voltage (Vstby) may be 3.3 V. For example, the LDO regulator (124) may supply the standby voltage (Vstby) to the controller (121), and the controller (121) may operate in a standby mode by the standby voltage (Vstby).

[0074] The controller (121) can operate according to the standby voltage (Vstby) received from the LDO regulator (124). The controller (121) can control the IR receiver (141) to operate based on the standby voltage (Vstby). The controller (121) can receive a turn-on command or a turn-off command for the display device (100) through the IR receiver (141).

[0075] The IR receiver (141) can receive an IR signal corresponding to a user input. The IR receiver (141) is only one example of the input interface (140), and examples of the input interface (140) are not limited thereto.

[0076] For example, a turn-on command or a turn-off command for the display device (100) may be an IR signal of the IR communication method. When the controller (121) receives the turn-on command or the turn-off command for the display device (100) through the IR receiver (141), the controller (121) can control whether to supply power to the power supply (110) and the main module (130). For example, the controller (121) can control whether to supply power to the main module (130) by outputting a first switch control signal of an on signal or an off signal to the first switch (160). For example, the controller (121) can control whether to supply power to the power supply (110) by outputting a second switch control signal of an on signal or an off signal to the second switch (170).

[0077] For example, when the controller (121) receives a turn-off command for the display device (100) through the IR receiver (141), it can control power supplied to the power supply (110) and the main module (130) to be cut off. For example, the controller (121) can provide a second switch control signal of an off signal to the second switch (170) so that power of the power supply (110) is cut off. For example, the controller (121) can provide a first switch control signal of an off signal to the first switch (160) so that power of the main module (130) is cut off.

[0078] In addition, as an example, when the controller (121) receives a turn-on command for the display device (100) through the IR receiver (141), it can control power to be supplied to the power supply (110) and the main module (130). For example, the controller (121) can provide a second switch control signal of an on signal to the second switch (170) so that power is supplied to the power supply (110). For example, the controller (121) can provide a first switch control signal of an off signal to the first switch (160) so that operating power is supplied to the main module (130).

[0079] The main module (130) can operate based on an operating voltage (e.g., a first operating voltage) received from the power supply (110). In addition, the main module (130) can operate based on an operating voltage (e.g., a second operating voltage) received from the standby power supply (120). The main module (130) can output a power control signal (e.g., PS_ON) of an ON signal or an OFF signal to the controller (121). For example, the main module (130) can provide a power control signal of an OFF signal to the controller (121) so that the controller (121) operates in a standby mode. For example, the main module (130) can provide a power control signal of an ON signal to the controller (121) so that the controller (121) operates in a normal mode. The controller (121) can receive a power control signal of an ON signal or an OFF signal from the main module (130).

[0080] In one embodiment of the present disclosure, when the main module (130) receives a turn-off command for the display device (100) through the IR receiver (141) in the normal mode, the main module (130) can store the current working state in the memory as it is and provide a power control signal of an off signal to the controller (121) so that the controller (121) operates according to the standby mode. The controller (121) can perform an operation for switching the display device (100) to the standby mode based on the power control signal of the off signal received from the main module (130). For example, the controller (121) can control the first switch (160) by outputting a first switch control signal and control the second switch (170) by outputting a second switch control signal based on the power control signal.

[0081] Alternatively, in one embodiment of the present disclosure, the controller (121) may perform an operation to switch the display device (100) to a standby mode based on receiving a turn-off command for the display device (100) through the IR receiver (141) in normal mode.

[0082] In one embodiment of the present disclosure, when the controller (121) receives a turn-on command for the display device (100) through the IR receiver (141) in the standby mode, the controller (121) may perform an operation to switch to the normal mode. For example, the controller (121) may supply power to the power supply (110) by outputting a second switch control signal based on the turn-on command, and supply an operating voltage to the main module (130) by outputting a first switch control signal. The main module (130) may operate based on the operating voltage, and the main module (130) may output a power control signal of an ON signal to the controller (121) so that the controller (121) operates according to the normal mode.

[0083] In one embodiment of the present disclosure, in the standby mode of the display device (100), the IR receiver (141) and the controller (121) may be the main components that consume power. The controller (121) can identify whether a turn-on command of the display device (100) is received from the IR receiver (141), thereby minimizing or reducing the standby power consumed to operate the power supply (110) and / or the main module (130). For example, the standby power of the display device (100) may be less than 0.005 W.

[0084] FIG. 3 is a block diagram showing the configuration of a power supply and a standby power supply of a display device according to one embodiment.

[0085] Referring to FIG. 3, a display device (100) according to one embodiment may include a power supply (110), a standby power supply (120), a main module (130), an IR receiver (141), a display (150), a first switch (160), and a second switch (170). In addition, the display device (100) according to one embodiment may further include a transformer controller (310), a feedback circuit (320), and a third switch (330) included in a transformer circuit (123).

[0086] A transformer circuit (123) according to one embodiment may include a transformer controller (310) and a feedback circuit (320).

[0087] The transformer controller (310) can control the transformer circuit (123) through a feedback circuit (320) including various circuits so that the output voltage (Vout) output from the transformer circuit (123) outputs a voltage having the same magnitude as a preset voltage. The transformer controller (310) can control the on / off duty ratio of the switch (510 in FIG. 5) by applying a control signal to the transformer circuit (123). For example, the transformer controller (310) can be implemented as a PWM (Pulse Width Modulation) IC, but is not limited thereto.

[0088] The feedback circuit (320) can output a feedback signal to the transformer controller (310) when the output voltage (Vout) output from the transformer circuit (123) is outside the preset voltage range. The transformer circuit (123) can generate an output voltage (Vout) having the same magnitude as the operating voltage of the main module (130) through the feedback circuit (320). For example, the feedback circuit (320) can include an opto coupler, etc.

[0089] The transformer circuit (123) may further include a third switch (330) that transmits an operating voltage for operating the feedback circuit (320) to the feedback circuit (320). The third switch (330) may be located between the feedback circuit (320) and the operating voltage. The third switch (330) may be short-circuited or opened based on a third switch control signal of an on / off signal received from the controller (121). For example, the third switch (330) may be short-circuited based on a third switch control signal of an on signal received from the controller (121) to transmit an operating voltage for operating the feedback circuit (320). For example, the third switch (330) may be opened based on a third switch control signal of an off signal received from the controller (121) to block an operating voltage for operating the feedback circuit (320).

[0090] The controller (121) can receive the standby voltage, output a first switch control signal to the first switch (160), output a second switch control signal to the second switch (170), and output a third switch control signal to the third switch (330).

[0091] In one embodiment, the controller (121) may output a switch control signal, for example, a third switch control signal of an off signal, for turning off the feedback circuit (320) based on a turn-off command of the display device (100). The feedback circuit (320) may be turned off according to the third switch control signal. As the feedback circuit (320) is turned off, the transformer controller (310) may operate according to a burst mode. The burst mode is an operation for improving efficiency when the amount of output current used is not high, and may mean a light load operation. For example, the transformer controller (310) may improve efficiency by reducing the number of on / off switching times per unit time for the switch (540) according to the burst mode. For example, the transformer controller (310) may keep the turn-on time or the turn-off time of the switch (540) constant and change the frequency according to the burst mode.

[0092] In one embodiment, the controller (121) may sequentially output a first switch control signal and a second switch control signal, and output a third switch control signal, based on a turn-off command of the display device (100).

[0093] In addition, in one embodiment, the controller (121) may output a switch control signal, for example, a third switch control signal of an on signal, for turning on the feedback circuit (320) based on a turn-on command of the display device (100). The feedback circuit (320) may be turned on according to the third switch control signal. When the feedback circuit (320) operates, the transformer controller (310) may keep the frequency constant according to the PWM method and change the turn-on time or turn-off time of the switch (540) (i.e., adjust the duty ratio) to keep the number of on / off switchings per unit time constant. The PWM method may be different from the burst method.

[0094] In one embodiment, the controller (121) may sequentially output a third switch control signal and then a second switch control signal and a first switch control signal based on a turn-on command of the display device (100).

[0095] In one embodiment of the present disclosure, in the standby mode of the display device (100), the IR receiver (141) and the controller (121) may be the main components that consume power. The controller (121) can identify whether a turn-on command of the display device (100) is received from the IR receiver (141), thereby minimizing or reducing the standby power consumed to operate the power supply (110), the main module (130), and / or the feedback circuit (320). For example, the standby power of the display device (100) may be less than 0.005 W.

[0096] FIG. 4 is a block diagram showing the configuration of a power supply and a standby power supply of a display device according to one embodiment.

[0097] Referring to FIG. 4, a display device (100) according to one embodiment may include a power supply (110), a standby power supply (120), a main module (130), an IR receiver (141), a display (150), a first switch (160), and a second switch (170). In addition, the display device (100) according to one embodiment may further include a fourth switch (410).

[0098] The fourth switch (410) can transmit or block an operating voltage (e.g., Vcc) for operating the IR receiver (141) to the IR receiver (141). The fourth switch (410) can be located between the IR receiver (141) and the operating voltage. The fourth switch (410) can be short-circuited or opened based on the fourth switch control signal of the on / off signal received from the controller (121). For example, the fourth switch (410) can be short-circuited based on the fourth switch control signal of the on signal received from the controller (121) to transmit an operating voltage for operating the IR receiver (141). For example, the fourth switch (410) can be opened based on the fourth switch control signal of the off signal received from the controller (121) to block an operating voltage for operating the IR receiver (141).

[0099] The controller (121) can control the IR receiver (141) to operate. The controller (121) can control the fourth switch (410) to supply an operating voltage for the IR receiver (141) to operate.

[0100] In one embodiment, when the display device (100) is in normal mode, the controller (121) can transmit a fourth switch control signal of an ON signal to the fourth switch (410) to operate the IR receiver (141).

[0101] In one embodiment, when the display device (100) is in standby mode, the controller (121) can repeatedly output a fourth switch control signal of an on signal and a fourth switch control signal of an off signal to the fourth switch (410) so that the IR receiver (141) is repeatedly turned on and off at regular time intervals. Since the operation of repeatedly turning the IR receiver (141) on and off consumes less power than when the IR receiver (141) is always maintained in an on state, the standby power consumption in the display device (100) can be minimized or reduced in standby mode.

[0102] In one embodiment, the IR receiver (141) may sequentially receive multiple IR signals based on a user's input. For example, the IR receiver (141) may sequentially receive a first turn-on command and a second turn-on command (see 615 of FIG. 6).

[0103] In one embodiment, when the display device (100) is in standby mode, the controller (121) can receive a first turn-on command for the display device (100) from the IR receiver (141). While the controller (121) operates the IR receiver (141) through the fourth switch control signal of the on signal in the standby mode, the controller (121) can receive the first turn-on command through the IR receiver (141).

[0104] In one embodiment, the controller (121) may transmit a fourth switch control signal of an ON signal to the fourth switch (410) to continuously supply operating power to the IR receiver (141) based on the first turn-on command.

[0105] In one embodiment, the controller (121) may perform a series of operations for causing the display device (100) to operate in a standby mode based on receiving a second turn-on command for the display device (100) from the IR receiver (141) that is turned on. For example, the controller (121) may output a first switch control signal to the first switch (160) to cut off power consumption of the main module (130), and output a second switch control signal to the second switch (170) to cut off power consumption of the power supply (110). In the present disclosure, the meaning of blocking an object may include not only blocking an object but also reducing the object.

[0106] Fig. 5 is a circuit diagram showing the configuration of a display device according to one embodiment.

[0107] Referring to FIG. 5, a display device (100) according to one embodiment may include a power supply (110), a standby power supply (120), a main module (130), an IR receiver (141), a display (150), a first switch (160), a second switch (170), a third switch (330), and a fourth switch (410). The display device (100) according to one embodiment may include a controller (121) (e.g., including a circuit) located on the secondary side.

[0108] The standby power supply (120) may include a second rectifier (122), a transformer circuit (123), an LDO regulator (124), and a controller (121).

[0109] The second rectifier (122) can rectify power received from an external power source (10). The second rectifier (122) can convert the received AC power into DC power. For example, the second rectifier (122) can be implemented using a bridge diode.

[0110] The transformer circuit (123) can supply a constant level of voltage to each component, such as the controller (121) and the main module (130), by controlling the direct current power output from the second rectifier (122). The transformer circuit (123) can include a transformer (510), a rectifier diode (520), a smoothing capacitor (530), a transformer controller (310), a feedback circuit (320), and a third switch (330). The feedback circuit (320) can be located on the secondary side, and the transformer controller (310) and the third switch (330) can be located on the primary side.

[0111] The transformer (510) may be a transformer in which the primary side and the secondary side are insulated. The transformer (510) may include a primary coil (511) and a secondary coil (512) in which a predetermined voltage is induced by the primary coil (511). The rectifier diode (520) may rectify the voltage induced in the secondary coil (512), and the smoothing capacitor (530) may smooth the output voltage (Vout) output through the rectifier diode (520). The output voltage (Vout) output through the rectifier diode (520) is applied to a feedback circuit (320), and the feedback circuit (320) may provide a feedback signal to the transformer controller (310) based on the output voltage (Vout). The transformer controller (310) can adjust the on / off duty ratio of the switch (540) based on the feedback signal received from the feedback circuit (320). For example, if the transformer controller (310) determines that the output voltage (Vout) is greater than a preset voltage, the transformer controller (310) can output a switching control signal with a long duty ratio to the switch (540). If the transformer controller (310) determines that the output voltage (Vout) is less than a preset voltage, the transformer controller (310) can output a switching control signal with a short duty ratio to the switch (540).

[0112] The LDO regulator (124) can output a standby voltage (Vstby) by taking as input the output voltage (Vout) received from the transformer circuit (123). For example, the output voltage (Vout) may be 13 V, and the standby voltage (Vstby) may be 3.3 V. The LDO regulator (124) can supply the standby voltage (Vstby) to the controller (121), and the controller (121) can operate in standby mode by the standby voltage (Vstby).

[0113] The first switch (160) can transmit the output voltage (Vout) received from the transformer circuit (123) to the main module (130). The first switch (160) can be located between the terminal of the input voltage (Vload_in) and the 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 mean a switch that blocks voltage to maintain the display device (100) in standby mode. The first switch (160) can include various switching elements. For example, the first switch (160) can include, but is not limited to, a FET (Field Effect Transistor) and a BJT (Bipolar Junction Transistor) element.

[0114] The first switch (160) can be controlled by the first switch control signal (SW1) of the controller (121). When the first switch (160) is turned on, the output voltage (Vout) is transmitted to the main module (130), and when the first switch (160) is turned off, the output voltage (Vout) cannot be transmitted to the main module (130).

[0115] Meanwhile, in one embodiment, when the first switch (160) is turned on, an inrush current may occur. The inrush current refers to an excessive charging current that occurs to charge the output capacitor when the load switch is turned on. When the inrush current occurs, it may be excessively larger than the current normally used, which may cause damage to the load switch. Therefore, when the controller (121) outputs the first switch control signal (SW1) of the on signal to the first switch (160), the inrush current may be limited through soft start control. For example, the soft start control may refer to an operation in which the controller (121) gradually increases the amount of the first switch control signal (SW1) that is transmitted to the first switch (160). For example, the controller (121) can control the on time of the first switch (160) to increase stepwise when turning on the first switch (160) (see normal mode (660) at 640 in FIG. 6).

[0116] The second switch (170) may be located between the external power source (10) and the power supply (110). The second switch (170) may be a relay that cuts off the voltage to reduce standby power consumption of the power supply (110) in standby mode. The relay may be turned on by generating magnetic force by a coil through which a current flows when a predetermined power is applied. The second switch (170) may be controlled by a second switch signal (SW2) of the controller (121). When the second switch (170) is turned on, power may be supplied to the power supply (110). When the second switch (170) is turned off, power is not supplied to the power supply (110), and since it is physically cut off, there may be no standby power consumption. For example, power may not be supplied to the circuits constituting the first rectifier (111), the power factor regulator (112), and the power transformer (113).

[0117] In one embodiment, when the display device (100) switches from standby mode to normal mode, the controller (121) needs to turn on the feedback circuit (320) and then turn on the second switch (170). The coil of the second switch (170) may generate magnetic force upon receiving the output voltage (Vout) of the transformer circuit (123). The output voltage (Vout) of the transformer circuit (123) may be different from a preset voltage before the feedback operation of the feedback circuit (320) is completed. Therefore, when the second switch control signal of the on signal is provided to the second switch (170) before the feedback operation is completed, the second switch (170) may not turn on and may malfunction.

[0118] The third switch (330) is 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 cut off the operating voltage to the feedback circuit (320) through the third switch (330) to reduce standby power consumption in the standby mode. The third switch (330) can be controlled by the third switch control signal (SW3) of the controller (121). When the third switch (330) is turned on, the feedback circuit (320) can be turned on, and when the third switch (330) is turned off, the feedback circuit (320) can be turned off. The third switch control signal (SW3) may also be referred to as a wake up signal.

[0119] The fourth switch (410) is 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 the fourth switch control signal (SW4) of the controller (121). When the fourth switch (410) is turned on, the IR receiver (141) can be turned on, and when the fourth switch (410) is turned off, the IR receiver (141) can be turned off. In one embodiment, when the display device (100) is in standby mode, the controller (121) can repeatedly provide an on / off signal to the fourth switch (410) to control the IR receiver (141) to operate (see the standby mode (670) at 620 in FIG. 6).

[0120] The controller (121) can operate according to the standby voltage (Vstby) received from the LDO regulator (124). The controller (121) can control the IR receiver (141) to operate based on the standby voltage (Vstby). The controller (121) can receive a turn-on command for the display device (100) through the IR receiver (141) and perform a series of operations to switch from the standby mode to the normal mode. The controller (121) can receive a turn-off command for the display device (100) through the IR receiver (141) and perform a series of operations to switch from the normal mode to the standby mode. The controller (121) can be implemented as an MCU (Micro Control Unit), but is not limited thereto.

[0121] 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) may be turned on.

[0122] 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 (170), the second switch (170), and the third switch (330) may be turned off. In the standby mode, the standby power supply (120), the IR receiver (141), and the fourth switch (410) may be turned on. Since the power supply (110), the feedback circuit (320), and the main module (130) do not operate in the standby mode, standby power consumption may be minimized or reduced.

[0123] When the power supply (110) is turned on in standby mode and the power factor regulator (112) operates, the DC power with the power factor adjusted can be delivered to the transformer circuit (123) through the blocking diode (550). For example, the voltage of the transformer circuit (123) is converted into the DC power of the power factor regulator (112), so that the power system quality can be maintained. For example, the power factor regulator (112) can have a DC power with the same voltage and current phase. For example, the transformer circuit (123) can have a DC power with different voltage and current phases, and can be converted into a power with the same voltage and current phase based on the DC power received from the power factor regulator (112).

[0124] The circuit configuration of the display device (100) illustrated in FIG. 5 is exemplary and is not limited thereto. In particular, the circuit configuration of the power supply (110) may be replaced with any type of circuit capable of converting AC power into DC power and generating power required for each component of the display device (100).

[0125] Fig. 6 is a timing diagram for explaining the timing of each signal in normal mode and standby mode of a display device according to one embodiment. Fig. 6 will be explained with reference to Fig. 5.

[0126] In 605 of FIG. 6, the display device (100) can receive AC power when connected to an external power source (10).

[0127] At 610 of FIG. 6, when an external power source (10) is connected to the display device (100), the standby power supply (120) operates and can generate standby power (Vstby). For example, the standby power source (Vstby) may be 3.3 V, but is not limited thereto.

[0128] At 615 in FIG. 6, the IR receiver (141) can receive an IR signal of a turn-off command in normal mode (660). Additionally, the IR receiver (141) can receive an IR signal of a turn-on command in standby mode (670). The IR receiver (141) can receive an IR signal at least twice through a single user input. For example, the IR receiver (141) can receive a first turn-on command (1st) and a second turn-on command (2nd).

[0129] At 620 of FIG. 6, the controller (121) can output a fourth switch control signal (SW4) of an on signal to the fourth switch (410) in the normal mode (660). The fourth switch (410) can be in an on state in the normal mode (660). In addition, the controller (121) can repeatedly output a fourth switch control signal (SW4) of an on signal and an off signal to the fourth switch (410) in the standby mode (670).

[0130] At 625 of FIG. 6, the controller (121) can output a third switch control signal (SW3) of an on signal to the third switch (330) in the normal mode (660). The third switch (330) can be in an on state in the normal mode (660). In addition, the controller (121) can output a third switch control signal (SW3) of an off signal to the third switch (330) in the standby mode (670). The third switch (330) can be in an off state in the standby mode (670).

[0131] At 630 of FIG. 6, the controller (121) can receive a power control signal (PS_ON) of an on signal from the main module (130) in normal mode (660). The controller (121) can receive a power control signal (PS_ON) of an off signal from the main module (130) in standby mode (670).

[0132] At 635 in FIG. 6, the controller (121) can output a second switch control signal (SW2) of an on signal to the second switch (170) in the normal mode (660). The second switch (170) can be in an on state in the normal mode (660). In addition, the controller (121) can output a second switch control signal (SW2) of an off signal to the second switch (170) in the standby mode (670). The second switch (170) can be in an off state in the standby mode (670).

[0133] At 640 of FIG. 6, the controller (121) can output a first switch control signal (SW1) of an on signal to the first switch (160) in the normal mode (660). The first switch (160) can be in an on state in the normal mode (660). In addition, the controller (121) can output a first switch control signal (SW1) of an off signal to the first switch (160) in the standby mode (670). The first switch (160) can be in an off state in the standby mode (670).

[0134] When the controller (121) outputs the first switch control signal (SW1) of the on signal to the first switch (160), the controller (121) can limit the inrush current through soft start control. For example, the controller (121) can perform an operation (641) of gradually increasing the amount of the first switch control signal (SW1) transmitted to the first switch (160).

[0135] In 645 and 650 of FIG. 6, in the normal mode (660), the input voltage (Vload_in) of the first switch (160) may be equal to the output voltage (Vout) of the transformer circuit (123) operating based on the external power source (10). In addition, since the first switch (160) is turned on in the normal mode (660), the output voltage (Vload_out) of the first switch (160) may be equal to the input voltage (Vload_in). In the standby mode (670), as the feedback circuit (320) is turned off, the output voltage (Vout) becomes smaller than the preset voltage range, so the input voltage (Vload_in) of the first switch (160) may decrease. Since the first switch (160) is turned off in the standby mode (670), the output voltage (Vload_out) of the first switch (160) may be 0 V.

[0136] In one embodiment, the controller (1221) can receive a turn-off command for the display device (100) through the IR receiver (141) in the normal mode (660). In addition, the main module (130) can receive a turn-off command for the display device (100) through the IR receiver (141) in the normal mode (660). The main module (130) can store the current working state in the memory as it is and provide a power control signal (PS_ON) of an off signal so that the controller (121) operates according to the standby mode. The controller (121) that receives the power control signal (PS_ON) of the off signal can output a first switch control signal (SW1) of an off signal to the first switch (160) in order to cut off the supply of the output voltage (Vout) transmitted to the main module (130). The controller (121) can output a second switch control signal (SW2) of an off signal to the second switch (170) to cut off the supply of external power (10) transmitted to the power supply (110). The controller (121) can output a third switch control signal (SW3) of an off signal to the third switch (330) to turn off the feedback circuit (320).

[0137] In one embodiment, the controller (121) may receive a turn-on command for the display device (100) through the IR receiver (141) in the standby mode (670). The controller (121) may output a wake-up signal to turn on the feedback circuit (320). For example, the controller (121) may output a third switch control signal (SW3) of an on signal to the third switch (330). The controller (121) may output a second switch control signal (SW2) of an on signal to the second switch (170) to turn on the power supply (110). The controller (121) may output a first switch control signal (SW1) of an on signal to the first switch (160) to turn on the main module (130). The controller (121) can receive a power control signal (PS_ON) of an on signal to operate in normal mode from the turned-on main module (130).

[0138] Hereinafter, with reference to FIGS. 7 and 8, an operation for operating in a standby mode when the display device (100) receives a turn-off command in normal mode will be described.

[0139] FIG. 7 is a flowchart illustrating an operation of switching from normal mode to standby mode upon receiving a turn-off command by a display device according to one embodiment.

[0140] Referring to FIG. 7, at step 710, the display device (100) can control the input interface (140) to receive a turn-off command for the display device (100).

[0141] According to one embodiment, the display device (100) can generate an operating voltage of the main module (130) from an external power source (10) through a transformer circuit (123). In addition, the display device (100) can generate a standby voltage lower than the operating voltage from the operating voltage through a regulator (e.g., an LDO regulator (124)). The main module (130) according to one embodiment can operate according to the operating voltage. The controller (121) according to one embodiment can operate according to the standby voltage. The standby power supply (120) including the transformer circuit (123) and the LDO regulator (124) can operate in a separate configuration from the power supply (110) that generates a voltage for driving the display device (100) from the external power source (10).

[0142] For example, the main module (130) that operates according to the operating voltage can control the input interface (140) to receive a turn-off command for the display device (100). The main module (130) can store the current working state in the memory based on receiving the turn-off command for the display device (100). For example, the main module (130) can control the input interface (140) as at least one processor included in the main module (130) executes one or more instructions stored in the memory.

[0143] Additionally, for example, a controller (121) that operates according to standby voltage can control an input interface (140) to receive a turn-off command for the display device (100).

[0144] In normal mode, the input interface (140) can be controlled by the main module (130) and can transmit a turn-off command to the main module (130). In addition, in normal mode, the input interface (140) can be controlled by the controller (121) and can transmit a turn-off command to the controller (121). Meanwhile, as will be described later with reference to FIGS. 9 and 10, in standby mode, the main module (130) does not operate and therefore cannot receive a turn-on command for the display device (100) from the interface (140). In standby mode, the display device (100) can receive a turn-on command for the display device (100) from the input interface (140) under the control of the controller (121).

[0145] The input interface (140) can receive a turn-on command or a turn-off command for the display device (100). For example, the input interface (140) can be an IR receiver (141), and the turn-on command or the turn-off command can be an IR signal, but is not limited thereto. For example, the input interface (140) can be a function key such as a keypad or a power button, and the turn-on command or the turn-off command can be a function key signal.

[0146] When the input interface (140) receives a turn-off command, it can transmit it to the main module (130) and the controller (121), respectively. Meanwhile, as will be described later in FIGS. 9 and 10, in standby mode, the input interface (140) can transmit a turn-on command to the controller (121).

[0147] In step 720, the controller (121) may output a first switch control signal (SW1) to open the first switch (160) that transmits an operating voltage to the main module (130) to operate the main module (130) based on the turn-off command. The first switch control signal (SW1) may be an off signal of the first switch (160).

[0148] For example, the controller (121) can output a control signal to turn off the main module (130). The controller (121) can provide a first switch control signal (SW1) of an off signal to the first switch (160) so that the supply of operating power to the main module (130) is cut off. For example, the controller (121) can not provide the output voltage generated through the transformer circuit (123) to the main module (130). Accordingly, the power consumption due to the operation of the main module (130) in standby mode can be minimized or reduced.

[0149] For example, the first switch (160) may be a load switch that cuts off unused voltage to reduce standby power consumption in standby mode. The first switch (160) may include, but is not limited to, a FET (Field Effect Transistor) and a BJT (Bipolar Junction Transistor) element.

[0150] In step 730, the controller (121) may output a second switch control signal (SW2) to open a second switch (170) connected between an external power source (10) and a power supply (110) that generates power supplied from the external power source (10) to the display device (100). The second switch control signal (SW2) may be an off signal of the second switch (170).

[0151] For example, the controller (121) can output a control signal to turn off the power supply (110). The controller (121) can provide a second switch control signal (SW2) of an off signal to the second switch (170) so that the supply of the external power (10) to the power supply (110) is cut off. Accordingly, power consumption due to the operation of the power supply (110) in standby mode can be minimized or reduced.

[0152] For example, the second switch (170) may be a relay that cuts off the voltage to reduce standby power consumption of the power supply (110) in standby mode.

[0153] In one embodiment of the present disclosure, the display device (100) can be controlled to turn off components other than the input interface (140) and the controller (121) in the standby mode. For example, the display device (100) can be controlled to turn off components of the power supply (110) and the main module (130) through the controller (121). For example, in the standby mode, the power supply (110), the main module (130), and the feedback circuit (320) may be in the off state. Therefore, in the standby mode of the display device (100), the input interface (140) and the controller (121) may be the main components that consume power. Since the controller (121) can identify whether a turn-on command of the display device (100) is received from the input interface (140) in the standby mode, the standby power consumed to operate the power supply (110) and / or the main module (130) can be minimized or reduced.

[0154] FIG. 8 is a flowchart illustrating an operation of switching from normal mode to standby mode upon receiving a turn-off command by a display device according to one embodiment.

[0155] Referring to FIG. 8, in step 810, the display device (100) may control the input interface (140) to receive a turn-off command for the display device (100). Step 810 may correspond to step 710 of FIG. 7.

[0156] For example, a main module (130) that operates according to an operating voltage can control an input interface (140) to receive a turn-off command for the display device (100). Based on receiving the turn-off command for the display device (100), the main module (130) can store the current working state in memory.

[0157] Additionally, for example, a controller (121) that operates according to standby voltage can control an input interface (140) to receive a turn-off command for the display device (100).

[0158] In step 820, the main module (130) may output a power control signal (PS_ON) of an off signal to the controller (121). For example, the main module (130) may output a power control signal (PS_ON) of an off signal to the controller (121) through at least one processor to switch the display device (100) from a normal mode to a standby mode. Upon receiving the power control signal (PS_ON) of an off signal, the controller (121) may perform operations of steps 830, 840, and 850 to minimize or reduce standby power.

[0159] In one embodiment, if the controller (121) receives a turn-off command from the input interface (140), step 820 may be omitted.

[0160] At step 830, the controller (121) may output a first switch control signal (SW1) to open the first switch (160) that transmits an operating voltage to the main module (130) to operate the main module (130) based on the turn-off command. The first switch control signal (SW1) may be an off signal of the first switch (160).

[0161] For example, the controller (121) may provide a first switch control signal (SW1) of an off signal to the first switch (160) so that the supply of operating power to the main module (130) is cut off. For example, the controller (121) may not provide the output voltage generated through the transformer circuit (123) to the main module (130). Accordingly, the power consumption due to the operation of the main module (130) in standby mode may be minimized or reduced.

[0162] In step 840, the controller (121) may output a second switch control signal (SW2) to open a second switch (170) connected between an external power source (10) and a power supply (110) that generates power supplied from the external power source (10) to the display device (100) as the controller (121) outputs a first switch control signal (SW1). The second switch control signal (SW2) may be an off signal of the second switch (170).

[0163] For example, the controller (121) can provide a second switch control signal (SW2) of an off signal to the second switch (170) so that the supply of external power (10) to the power supply (110) is cut off. Accordingly, power consumption due to the operation of the power supply (110) in standby mode can be minimized or reduced.

[0164] At step 850, the controller (121) may output a control signal to turn off the feedback circuit (320). The controller (121) may cut off the operating voltage to the feedback circuit (320) to reduce standby power consumption in standby mode.

[0165] The feedback circuit (320) can output a feedback signal to the transformer controller (310) when the output voltage output from the transformer circuit (123) is outside the preset voltage range. For example, the feedback circuit (320) can output a feedback signal to the transformer controller (310) when the output voltage of the transformer circuit (123) is different from the operating voltage of the main module (130). For example, the controller (121) can block the operation of the feedback circuit (320) that identifies whether the output voltage and the operating voltage of the main module (130) are the same.

[0166] For example, the controller (121) may output a third switch control signal (SW3) to the third switch (330) to open the third switch (330) that transmits the operating voltage to the feedback circuit (320). The third switch control signal (SW3) may be an off signal of the third switch (330).

[0167] As the feedback circuit (320) is turned off, the transformer controller (310) may operate in a burst mode. For example, the transformer controller (310) may improve the efficiency of standby power by reducing the number of on / off switching cycles per unit time for the switch (540) in a burst mode.

[0168] In one embodiment of the present disclosure, the display device (100) can be controlled to turn off components other than the input interface (140) and the controller (121) in a standby mode. For example, the display device (100) can be controlled to turn off components of the power supply (110), the main module (130), and the feedback circuit (320) through the controller (121). For example, in the standby mode, the power supply (110), the main module (130), and the feedback circuit (320) can be in an off state. Since the controller (121) can identify whether a turn-on command of the display device (100) is received from the input interface (140) in the standby mode, the standby power consumed to operate the power supply (110) and / or the main module (130) can be minimized or reduced.

[0169] In addition, since the controller (121) does not provide the output voltage (Vout) generated through the transformer circuit (123) to the main module (130) in the standby mode, the operation of the feedback circuit (320) that identifies whether the output voltage (Vout) is equal to a preset voltage, for example, the operating voltage of the main module (130) can be blocked. Accordingly, the display device (100) can minimize or reduce the standby power consumed as the feedback circuit (320) operates.

[0170] Meanwhile, in the standby mode, the controller (121) can repeatedly output the fourth switch control signal (SW4) as an off signal that opens the fourth switch (410) that transmits operating power for operating the input interface (140) and the fourth switch control signal (SW4) as an on signal that shorts the fourth switch (410). Accordingly, the controller (121) can control the input interface (140) to be repeatedly turned on and off. Since the operation of repeatedly turning the input interface (140) on and off consumes less power than when the input interface (140) is always maintained in an on state, the standby power consumption in the display device (100) can be minimized or reduced in the standby mode.

[0171] Hereinafter, with reference to FIGS. 9 to 11, a series of processes for operating the display device (100) in normal mode upon receiving a turn-on command in standby mode will be described.

[0172] FIG. 9 is a flowchart illustrating an operation of a display device switching from standby mode to normal mode upon receiving a turn-on command according to one embodiment.

[0173] Referring to FIG. 9, in step 910, the controller (121) may receive a turn-on command for the display device (100) through the input interface (140). For example, in standby mode, the main module (130) is in an off state and does not operate, so the main module (130) may not receive a turn-on command through the input interface (140).

[0174] For example, in standby mode, the power supply (110), main module (130), and feedback circuit (320) may be in an off state. For example, in standby mode, the controller (121) and input interface (140) may be in an on state. For example, as the standby mode transitions to normal mode, the supply (110), main module (130), and feedback circuit (320) may be switched to an on state.

[0175] In step 920, the controller (121) may output a second switch control signal (SW2) to short-circuit the second switch (170) connected between the external power source (10) and the power supply (110). The controller (121) may provide the second switch control signal (SW2) of the on signal to the second switch (170). The turned-on second switch (170) may transmit the external power source (10) to the power supply (110). The controller (121) may control the external power source (10) to be supplied to the power supply (110). For example, the second switch (170) may be a relay that cuts off the voltage to reduce standby power consumption of the power supply (110) in standby mode.

[0176] In step 930, the controller (121) may output a first switch control signal (SW1) to short-circuit the first switch (160) that transmits the operating voltage to the main module (130). The controller (121) may provide the first switch control signal (SW1) of the on signal to the first switch (160). The turned-on second switch (160) may transmit the operating voltage to the main module (130). The controller (121) may control the main module (130) to be supplied with operating power. For example, the first switch (160) may be a load switch that blocks unused voltage to reduce standby power consumption in standby mode.

[0177] According to one embodiment, the display device (100) can generate an operating voltage of the main module (130) from an external power source (10) through a transformer circuit (123). For example, the operating voltage may be the same as an output voltage (Vout) generated by the transformer circuit (123) of the standby power supply (120). In addition, the display device (100) can generate a standby voltage lower than the operating voltage from the operating voltage through a regulator (e.g., an LDO regulator (124)). The controller (121) according to one embodiment can operate according to the standby voltage. The standby power supply (120) including the transformer circuit (123) and the LDO regulator (124) can operate in a separate configuration from the power supply (110) that generates a voltage for driving the display device (100) from the external power source (10).

[0178] FIG. 10 is a flowchart illustrating an operation of a display device switching from standby mode to normal mode upon receiving a turn-on command according to one embodiment.

[0179] Referring to FIG. 10, in step 1010, the controller (121) may receive a turn-on command for the display device (100) through the input interface (140). For example, in standby mode, the main module (130) is in an off state and does not operate, so the main module (130) may not receive a turn-on command through the input interface (140).

[0180] In step 1020, the controller (121) can output a control signal to turn on the feedback circuit (320). The turned-on feedback circuit (320) can output a feedback signal to the transformer controller (310) when the output voltage output from the transformer circuit (123) deviates from a preset voltage range, for example, the operating voltage of the main module (130). The transformer controller (310) can output a control signal for adjusting the on / off duty ratio of the switch (540) of the transformer circuit (123) based on the feedback signal. The transformer circuit (123) can generate an output voltage (Vout) having the same magnitude as the operating voltage of the main module (130) through the feedback circuit (320).

[0181] For example, the controller (121) may output a third switch control signal (SW3) to the third switch (330) to short-circuit the third switch (330) that transmits the operating voltage to the feedback circuit (320). The third switch control signal (SW3) may be an on signal of the third switch (330).

[0182] At step 1030, the controller (121) may output a second switch control signal (SW2) to short-circuit a second switch (170) connected between the external power source (10) and the power supply (110). The second switch control signal (SW2) may be an on signal of the second switch (170).

[0183] For example, the controller (121) can output a control signal to turn on the power supply (110). The controller (121) can provide a second switch control signal (SW2) of an on signal to the second switch (170) so that external power (10) is supplied to the power supply (110).

[0184] Meanwhile, in one embodiment, when the display device (100) switches from standby mode to normal mode, the controller (121) needs to turn on the feedback circuit (320) and then turn on the second switch (170). The coil of the second switch (170) may generate magnetic force upon receiving the output voltage (Vout) of the transformer circuit (123). The output voltage (Vout) of the transformer circuit (123) may be different from the preset voltage until the feedback operation of the feedback circuit (320) is completed. Therefore, when the second switch control signal of the on signal is provided to the second switch (170) before the feedback operation is completed, the second switch (170) may not turn on and may malfunction.

[0185] At step 1040, the controller (121) may output a first switch control signal (SW1) to short-circuit the first switch (160) that transmits the operating voltage to the main module (130). The first switch control signal (SW1) may be an on signal of the first switch (160).

[0186] For example, the controller (121) can output a control signal to turn on the main module (130). The controller (121) can provide a first switch control signal (SW1) of an on signal to the first switch (160) so that operating power is supplied to the main module (130). For example, the controller (121) can provide an output voltage generated through the transformer circuit (123) to the main module (130).

[0187] In step 1050, the controller (121) may receive a power control signal (PS_ON) of an on signal from the main module (130) as it outputs the first switch control signal (SW1). The main module (130) may output a power control signal (PS_ON) of an on signal to the controller (121) for switching the display device (100) from standby mode to normal mode. For example, the display (150) may be turned on according to the power control signal (PS_ON) of the on signal.

[0188] FIG. 11 is a flowchart illustrating an operation of a display device switching from standby mode to normal mode upon receiving a turn-on command according to one embodiment.

[0189] Referring to FIG. 11, in step 1110, the controller (121) can control the input interface (140) to operate to receive a turn-on command for the display device (100). Since the controller (121) is in a turn-on state in the standby mode, the input interface (140) can be controlled by the controller (121) rather than the main module (130).

[0190] The controller (121) can control the input interface (140) to operate in standby mode.

[0191] For example, the controller (121) can control the input interface (140) to transmit an operating voltage (e.g., Vcc) for the input interface (140) to operate. For example, the controller (121) can provide a fourth switch control signal of an off signal so that the fourth switch (410) that transmits operating power to the input interface (140) is short-circuited.

[0192] Additionally, as an example, the controller (121) can supply operating power for the input interface (140) to operate.

[0193] In step 1120, the controller (121) may receive a turn-on command for the display device (100) via the input interface (140). Step 1120 may correspond to step 1010 of FIG. 10.

[0194] In step 1130, the controller (121) may output a control signal to turn on the feedback circuit (320). Step 1130 may correspond to step 1020 of FIG. 10.

[0195] In step 1140, the controller (121) may output a second switch control signal (SW2) to short-circuit a second switch (170) connected between the external power source (10) and the power supply (110). Step 1140 may correspond to step 1030 of FIG. 10.

[0196] At step 1150, the controller (121) may output a first switch control signal (SW1) to short-circuit the first switch (160) that transmits the operating voltage to the main module (130). Step 1150 may correspond to step 1040 of FIG. 10.

[0197] FIG. 12 is a block diagram showing the configuration of a power supply and a standby power supply of a display device according to one embodiment.

[0198] Referring to FIG. 12, in a display device (1200) according to one embodiment, a power supply (110) may be connected to a main module (130) via a diode (1210).

[0199] According to one embodiment, the power supply (110) can generate an operating voltage for operating the main module (130) as well as a driving voltage for operating the display (150). The power transformer (113) can supply a constant level of voltage to each component, such as the main module (130) and the display (150), by adjusting the DC voltage output from the power factor regulator (112). For example, the power transformer (113) can generate power (e.g., a driving voltage (Vdrv)) required for the display (150) to operate. For example, the power transformer (113) can generate power (e.g., an operating voltage) required for the main module (130) to operate.

[0200] According to one embodiment, the main module (130) can receive operating power from a power supply (110).

[0201] In a display device (1200) according to one embodiment, the standby power supply (120) may not generate an operating voltage to be provided to the main module (130). Even in this case, the standby power supply (120) may be controlled to receive an IR signal through the IR receiver (141) in standby mode.

[0202] In a display device (1200) according to one embodiment, a power supply (110) may generate an operating voltage for operating a main module (130), and a standby power supply (120) may control an IR receiver (141) to operate for receiving a turn-on command in a standby mode. Accordingly, the power consumption of the controller (121) may be reduced from approximately 60 W to 15 W.

[0203] A display device (100) according to one embodiment of the present disclosure includes a power supply (110) that supplies power from an external power source (10) to the display device (100), an input interface (140) that includes a circuit configured to receive a turn-on command or a turn-off command for the display device (100), a main module (130) that includes a circuit configured to operate according to an operating voltage, and a controller (121) that includes a circuit configured to operate according to a standby voltage.

[0204] A controller (121) according to one embodiment of the present disclosure outputs a first switch control signal (SW1) to open a first switch (160) that transmits an operating voltage to a main module (130) based on a turn-off command.

[0205] According to one embodiment of the present disclosure, the controller (121) outputs a second switch control signal (SW2) to open a second switch (170) connected between an external power source (10) and a power supply (110) as it outputs a first switch control signal (SW1).

[0206] A display device (100) according to one embodiment of the present disclosure may further include a feedback circuit (320) that outputs a feedback signal when an operating voltage for operating the main module (130) goes out of a preset range.

[0207] According to one embodiment of the present disclosure, the controller (121) can output a control signal (SW3) for turning off the feedback circuit (320) by outputting a second switch control signal (SW2).

[0208] A display device (100) according to one embodiment of the present disclosure may include a standby power supply (120) having a transformer circuit (123) that generates an operating voltage of a main module (130) from an external power source (10), and a regulator (124) that generates a standby voltage lower than the operating voltage from the operating voltage.

[0209] A controller (121) according to one embodiment of the present disclosure can receive a standby voltage from a regulator (124).

[0210] A main module (130) according to one embodiment of the present disclosure may further include at least one processor including a processing circuit, and a memory storing one or more instructions executed by the at least one processor.

[0211] At least one processor according to one embodiment of the present disclosure may individually and / or collectively control an input interface (140) to receive a turn-off command for the display device (100).

[0212] At least one processor according to one embodiment of the present disclosure can output a power control signal (PS_ON) to the controller (121) to switch the display device (100) from normal mode to standby mode based on a turn-off command.

[0213] A controller (121) according to one embodiment of the present disclosure may be configured to output a first switch control signal (SW1) and / or a second switch control signal (SW2) upon receiving a power control signal (PS_ON).

[0214] A controller (121) according to one embodiment of the present disclosure can repeatedly output a switch control signal (SW4) of an off signal that opens a switch (410) that transmits operating power for operating an input interface (140) based on a turn-off command for a display device (100) and a switch control signal (SW4) of an on signal that shorts the switch (410).

[0215] A controller (121) according to one embodiment of the present disclosure can receive a turn-on command for a display device (100) through an input interface (140).

[0216] A controller (121) according to one embodiment of the present disclosure may output a second switch control signal (SW2) to short-circuit a second switch (170) to transmit external power (10) to a power supply (110) based on a turn-on command.

[0217] According to one embodiment of the present disclosure, the controller (121) can output a first switch control signal (SW1) to short-circuit the first switch (160) to transmit an operating voltage to the main module (130) by outputting a second switch control signal (SW2).

[0218] A controller (121) according to one embodiment of the present disclosure can output a control signal (SW3) to turn on a feedback circuit (320) based on a turn-on command.

[0219] A controller (121) according to one embodiment of the present disclosure can output a second switch control signal (SW2) by outputting a control signal (SW3).

[0220] According to one embodiment of the present disclosure, the controller (121) can receive a power control signal (PS_ON) from the main module (130) to switch the display device (100) from standby mode to normal mode by outputting a first switch control signal (SW1).

[0221] A controller (121) according to one embodiment of the present disclosure can provide a first switch control signal (SW1) whose ON time increases stepwise to the first switch (160).

[0222] A controller (121) according to one embodiment of the present disclosure can receive a first turn-on command for a display device (100) from an input interface (140).

[0223] A controller (121) according to one embodiment of the present disclosure can output a switch control signal (SW4) to short-circuit a switch (410) that transmits power to operate an input interface (140) based on a first turn-on command.

[0224] A controller (121) according to one embodiment of the present disclosure may output a second switch control signal (SW2) and / or a first switch control signal (SW1) based on receiving a second turn-on command for the display device (100) from the input interface (140).

[0225] A controller (121) according to one embodiment of the present disclosure can control an input interface (140) to operate based on a standby voltage.

[0226] A method of operating a display device (100) according to one embodiment of the present disclosure includes a step of controlling an input interface (140) so that a main module (130) operating according to an operating voltage receives a turn-off command for the display device (100), a step of outputting a first switch control signal (SW1) so that a controller (121) operating according to a standby voltage opens a first switch (160) that transmits the operating voltage to the main module (130) based on the turn-off command, and a step of outputting a second switch control signal (SW2) so that the controller (121) opens a second switch (170) connected between an external power source (10) and a power supply (110) that generates power supplied from the external power source (10) to the display device (100) in response to outputting the first switch control signal (SW1).

[0227] The operating method of the display device (100) according to one embodiment of the present disclosure may further include a step of outputting a control signal (SW3) for turning off a feedback circuit (320) that outputs a feedback signal when the operating voltage for operating the main module (130) goes out of a preset range as the controller (121) outputs a second switch control signal (SW2).

[0228] A method of operating a display device (100) according to one embodiment of the present disclosure may further include a step of generating an operating voltage of a main module (130) from an external power source (10), a step of generating a standby voltage lower than the operating voltage from the operating voltage, and a step of a controller (121) receiving the standby voltage.

[0229] A method of operating a display device (100) according to one embodiment of the present disclosure may further include a step of controlling an input interface (140) so that a main module (130) receives a turn-off command for the display device (100), a step of outputting a power control signal (PS_ON) to a controller (121) based on the turn-off command so that the display device (100) switches from a normal mode to a standby mode, and a step of outputting a first switch control signal (SW1) and / or a second switch control signal (SW2) as the controller (121) receives the power control signal (PS_ON).

[0230] A method of operating a display device (100) according to one embodiment of the present disclosure may further include a step of repeatedly outputting a switch control signal (SW4) of an off signal for opening a switch (410) that transmits operating power for operating an input interface (140) and a switch control signal (SW4) of an on signal for shorting the switch (410), based on a turn-off command for the display device (100).

[0231] A method of operating a display device (100) according to one embodiment of the present disclosure may further include a step of receiving a turn-on command for the display device (100) by the controller (121) through the input interface (140), a step of outputting a second switch control signal (SW2) so that the controller (121) short-circuits the second switch (170) to transmit external power (10) to the power supply (110) based on the turn-on command, and a step of outputting a first switch control signal (SW1) so that the controller (121) short-circuits the first switch (160) to transmit an operating voltage to the main module (130) in response to outputting the second switch control signal (SW2).

[0232] A method of operating a display device (100) according to one embodiment of the present disclosure may further include a step of outputting a control signal (SW3) for turning on a feedback circuit (320) that outputs a feedback signal when an operating voltage for operating a main module (130) by the controller (121) goes out of a preset range, and a step of outputting a second switch control signal (SW2) in response to outputting the control signal (SW3).

[0233] The operating method of the display device (100) according to one embodiment of the present disclosure may further include a step of the controller (121) receiving a power control signal (PS_ON) from the main module (130) for switching the display device (100) from a standby mode to a normal mode as the first switch control signal (SW1) is output.

[0234] The method of operating a display device (100) according to one embodiment of the present disclosure may further include a step of operating the input interface (140) based on the standby voltage.

[0235] A device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, the term "non-transitory storage medium" simply means a tangible device that does not contain signals (e.g., electromagnetic waves). This term does not distinguish between cases where data is permanently stored in the storage medium and cases where data is temporarily stored. For example, a "non-transitory storage medium" may include a buffer in which data is temporarily stored.

[0236] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) through an application store or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product (e.g., a downloadable app) may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

Claims

1. In the display device (100), A power supply (110) that supplies power from an external power source (10) to the display device (100); An input interface (140) including a circuit configured to receive a turn-on command or a turn-off command for the display device (100); A main module (130) comprising a circuit configured to operate according to an operating voltage; and A controller (121) comprising a circuit configured to operate according to standby voltage, The above controller (121) Based on the above turn-off command, a first switch control signal (SW1) is output to open the first switch (160) that transmits the operating voltage to the main module (130), A display device (100) that outputs a second switch control signal (SW2) to open a second switch (170) connected between the external power source (10) and the power supply (110) in response to outputting the first switch control signal (SW1).

2. In paragraph 1, The above display device (100) further includes a feedback circuit (320) that outputs a feedback signal when the operating voltage for operating the main module (130) goes out of a preset range. The above controller (121) A display device (100) that outputs a control signal (SW3) for turning off the feedback circuit (320) by outputting the second switch control signal (SW2).

3. In paragraph 1 or 2, The display device (100) is A transformer circuit (123) that generates the operating voltage of the main module (130) from the external power source (10); and A standby power supply (120) having a regulator (124) for generating a standby voltage lower than the operating voltage from the operating voltage, The above controller (121) is a display device (100) that receives the standby voltage from the above regulator (124).

4. In any one of paragraphs 1 to 3, The main module (130) further includes at least one processor including a processing circuit, and a memory storing one or more instructions executed by the at least one processor. The above at least one processor individually and / or collectively, Controlling the input interface (140) to receive a turn-off command for the display device (100), Based on the above turn-off command, the controller (121) outputs a power control signal (PS_ON) to switch the display device (100) from normal mode to standby mode, The controller (121) is configured to output the first switch control signal (SW1) and / or the second switch control signal (SW2) upon receiving the power control signal (PS_ON), ​​in a display device (100).

5. In any one of paragraphs 1 to 4, The above controller (121) A display device (100) that repeatedly outputs a switch control signal (SW4) of an off signal that opens a switch (410) that transmits operating power for operating the input interface (140) based on a turn-off command for the display device (100) and a switch control signal (SW4) of an on signal that short-circuits the switch (410).

6. In any one of paragraphs 1 to 5, The above controller (121) Receive a turn-on command for the display device (100) through the input interface (140), Based on the turn-on command, a second switch control signal (SW2) is output to short-circuit the second switch (170) to transmit the external power (10) to the power supply (110). A display device (100) that outputs a first switch control signal (SW1) to short-circuit the first switch (160) to transmit the operating voltage to the main module (130) by outputting the second switch control signal (SW2).

7. In paragraph 6, The above display device (100) further includes a feedback circuit (320) that is connected to the controller (121) and outputs a feedback signal when the operating voltage for operating the main module (130) goes out of a preset range. The above controller (121) Based on the above turn-on command, a control signal (SW3) is output to turn on the feedback circuit (320), A display device (100) that outputs the second switch control signal (SW2) in response to outputting the above control signal (SW3).

8. In paragraph 6 or 7, The above controller (121) A display device (100) that receives a power control signal (PS_ON) from the main module (130) to switch the display device (100) from standby mode to normal mode by outputting the first switch control signal (SW1).

9. In any one of paragraphs 6 to 8, The above controller (121) A display device (100) that provides the first switch control signal (SW1) whose ON time increases stepwise to the first switch (160).

10. In clauses 6 to 9, The above controller (121) Receive a first turn-on command for the display device (100) from the input interface (140), Based on the first turn-on command, a switch control signal (SW4) is output to short-circuit the switch (410) that transmits power to operate the input interface (140), A display device (100) that outputs the second switch control signal (SW2) and / or the first switch control signal (SW1) based on receiving a second turn-on command for the display device (100) from the input interface (140).

11. In any one of paragraphs 1 to 10, The above controller (121) controls the input interface (140) to operate based on the standby voltage, the display device (100).

12. In the operating method of the display device (100), A step of controlling an input interface (140) so that a main module (130) operating according to an operating voltage receives a turn-off command for the display device (100); Based on the above turn-off command, a step for outputting a first switch control signal (SW1) so that a controller (121) operating according to the standby voltage opens a first switch (160) that transmits the operating voltage to the main module (130); and A method comprising the step of outputting a second switch control signal (SW2) so that the controller (121) opens a second switch (170) connected between an external power source (10) and a power supply (110) that generates power supplied to the display device (100) from the external power source (10) in response to outputting the first switch control signal (SW1).

13. In paragraph 12, A method further comprising the step of outputting a control signal (SW3) for turning off a feedback circuit (320) that outputs a feedback signal when the operating voltage for operating the main module (130) goes out of a preset range, as the controller (121) outputs the second switch control signal (SW2).

14. In clause 12 or 13, A step of generating an operating voltage of the main module (130) from the external power source (10); A step of generating the standby voltage lower than the operating voltage from the operating voltage; and A method further comprising a step of the controller (121) receiving the standby voltage.

15. In any one of paragraphs 12 to 14, A step of controlling the input interface (140) so that the main module (130) receives a turn-off command for the display device (100); Based on the turn-off command, the main module (130) outputs a power control signal (PS_ON) to the controller (121) to switch the display device (100) from normal mode to standby mode; and A method further comprising a step of outputting the first switch control signal (SW1) and / or the second switch control signal (SW2) when the controller (121) receives the power control signal (PS_ON).

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