Electronic device, power supply device and control method thereof

Abstract

An electronic device may include: a power supply device for generating a driving voltage and a standby voltage; and a main body operating based on the driving voltage and the standby voltage received from the power supply device. The power supply device includes: at least one converter for outputting at least one of a driving voltage and a standby voltage from an output terminal; a first capacitor connected to the at least one converter to store the driving voltage; a second capacitor connected to the at least one converter to store a standby voltage; and a discharge circuit electrically connected to the first capacitor to discharge the driving voltage stored in the first capacitor.

Description

Technical Field

[0001] The present disclosure relates to an electronic device having a discharge circuit, a power supply device and a control method thereof. Background Art

[0002] The development of the smart society has caused an increase in demand for image display devices and various types of display devices (such as liquid crystal displays, organic light emitting displays, etc.).

[0003] Displays can be divided into emissive types, such as cathode ray tubes (CRTs), electroluminescence (EL), light emitting diodes (LEDs), vacuum fluorescent displays (VFDs), field emission displays (FEDs), plasma display panels (PDPs), and organic light emitting diodes (OLEDs); and non-emissive types, such as liquid crystal displays (LCDs) that are not self-luminous.

[0004] Meanwhile, the display needs to output light of appropriate intensity or stronger across the entire screen, and may cause significant power consumption and heat during driving. Summary of the invention

[0005] Technical Solutions

[0006] An electronic device according to an embodiment of the present disclosure may include: a power supply device that generates a driving voltage and a standby voltage. In an embodiment, the electronic device may include a main body that operates based on the driving voltage and the standby voltage received from the power supply device. In an embodiment, the power supply device may include: at least one converter that outputs at least one of the driving voltage and the standby voltage from an output terminal; a first capacitor connected to at least one converter to store the driving voltage; a second capacitor connected to at least one converter to store the standby voltage; and a discharge circuit electrically connected to the first capacitor to release the driving voltage stored in the first capacitor.

[0007] In an embodiment, the discharge circuit may include at least one dummy resistor and a set of discharge transistors connected in series with the dummy resistor.

[0008] In an embodiment, the power supply device may include: a first controller to switch an electrical connection state of at least one dummy resistor. In an embodiment, the first controller may provide a voltage for activating a set of discharge transistors electrically connected to the at least one dummy resistor.

[0009] In an embodiment, gate electrodes of a group of discharge transistors may be connected in common through one node. In an embodiment, source-drain electrodes on one side of a group of discharge transistors may be electrically connected to at least one dummy resistor.

[0010] In an embodiment, the electronic device further includes a first voltage-dividing resistor and a second voltage-dividing resistor, and the discharge circuit may include at least one dummy resistor, a group of discharge transistors connected in series with the at least one dummy resistor, and a group of first control transistors operably connected to gate electrodes of the group of discharge transistors. In an embodiment, the source-drain electrode located on one side of the group of first control transistors may be electrically connected to the gate electrodes of the group of discharge transistors via the first voltage-dividing resistor. In an embodiment, the source-drain electrode located on the other side of the group of first control transistors may be electrically connected to the gate electrodes of the group of discharge transistors via the second voltage-dividing resistor.

[0011] In an embodiment, the power supply device may include: a first controller that switches the electrical connection state of at least one dummy resistor. In an embodiment, the first controller may provide a first voltage for activating a group of first control transistors to gate electrodes of a group of first control transistors. In an embodiment, the first controller may provide a second voltage for activating a group of discharge transistors to source-drain electrodes located on one side of the group of first control transistors.

[0012] In an embodiment, when a group of first control transistors is maintained in an active state, the second voltage supplied to the source-drain electrodes on one side of the group of first control transistors may not be supplied to the gate electrodes of the group of discharge transistors.

[0013] In an embodiment, when the group of first control transistors is maintained in an inactive state, at least a portion of the second voltage supplied to the source-drain electrodes on one side of the group of first control transistors may be supplied to the gate electrodes of the group of discharge transistors.

[0014] In an embodiment, the discharge circuit may include at least one dummy resistor, a group of discharge transistors connected in series with the at least one dummy resistor, a second control transistor electrically connected to the gate electrode of the group of discharge transistors, and a comparator having an output terminal connected to the gate electrode of the second control transistor. In an embodiment, the source-drain electrode on one side of the second control transistor may be connected to the gate electrode of the group of discharge transistors. In an embodiment, the source-drain electrode on the other side of the second control transistor is connected to the source-drain electrode on the other side of the group of discharge transistors via a sensing resistor. In an embodiment, the comparator receives a preset reference voltage through a first input terminal. In an embodiment, the comparator receives a sensing voltage detected from a node between the sensing resistor and the source-drain electrode on the other side of the group of discharge transistors through a second input terminal.

[0015] In an embodiment, the electronic device further comprises a sensing resistor, and the source-drain electrode on one side of a set of discharge transistors may be connected to at least one dummy resistor. In an embodiment, the source-drain electrode on the other side of the set of discharge transistors may be connected to the sensing resistor. In an embodiment, the at least one dummy resistor is electrically connected to one end of the first capacitor, and the sensing resistor may be electrically connected to the other end of the first capacitor.

[0016] In an embodiment, the discharge circuit may include a group of first control transistors. In an embodiment, a source-drain electrode on one side of the second control transistor may be connected to a gate electrode of a group of discharge transistors, and the two form a first node. In an embodiment, the first node may be electrically connected to a second node corresponding to one side of the group of first control transistors. In an embodiment, a first voltage-dividing resistor may be arranged between the first node and the second node, and a second voltage-dividing resistor may be arranged between the first node and the source-drain electrode on the other side of the second control transistor.

[0017] In an embodiment, the electronic device further includes a display, and the main body may include: a converter that converts a driving voltage received from a power supply device and outputs the converted power. In an embodiment, the main body may include: a driver that controls the driving of the display based on the converted power. In an embodiment, the main body may include: a second controller that controls the operation based on the converted power and the standby voltage.

[0018] In an embodiment, the at least one converter may include a first output terminal electrically connected to the first capacitor and a second output terminal electrically connected to the second capacitor. In an embodiment, the discharge circuit may be electrically connected only to the first output terminal.

[0019] In an embodiment, at least one converter may include a first converter outputting a driving voltage and a second converter outputting a standby voltage. In an embodiment, a first capacitor is connected to an output terminal of the first converter, and a second capacitor may be connected to an output terminal of the second converter. In an embodiment, the discharge circuit may be electrically connected only to the first output terminal.

[0020] In an embodiment of the present disclosure, the power supply device may supply power to a main body (eg, a display apparatus).

[0021] In an embodiment, the power supply device may include: at least one converter outputting at least one of a driving voltage and a standby voltage from an output terminal. In an embodiment, the power supply device may include: a first capacitor connected to the at least one converter to store the driving voltage. In an embodiment, the power supply device may include: a second capacitor connected to the at least one converter to store the standby voltage.

[0022] In an embodiment, the electronic device may include: a discharge circuit electrically connected to the first capacitor to release the driving voltage stored in the first capacitor.

[0023] In an embodiment, the discharge circuit may include at least one dummy resistor, a set of discharge transistors connected in series with the at least one dummy resistor, and a set of first control transistors operably connected to gate electrodes of the set of discharge transistors.

[0024] In an embodiment, the power supply device may include a first voltage dividing resistor and a second voltage dividing resistor, the source-drain electrode located on one side of a group of first control transistors may be electrically connected to the gate electrode of a group of discharge transistors via the first voltage dividing resistor, and the source-drain electrode located on the other side of the group of first control transistors may be electrically connected to the gate electrode of a group of discharge transistors via the second voltage dividing resistor.

[0025] In this way, the device according to the embodiment of the present disclosure can prevent heat generation caused by the dummy resistor by electrically connecting the active transistor to the dummy resistor. In addition, the device according to the embodiment of the present disclosure can prevent subsequent heat generation caused by degradation of the transistor connected to the dummy resistor by adopting a structure that couples multiple transmission RF signals into one group.

[0026] The effects of the present disclosure are not limited to the foregoing, and other unmentioned effects will be apparent to those skilled in the art based on the following description. In other words, those skilled in the art may also obtain unexpected effects from the embodiments of the present disclosure when practicing the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a block diagram showing an electronic device according to an embodiment of the present disclosure;

[0028] Figure 2 is a block diagram showing a main body according to an embodiment of the present disclosure;

[0029] Figure 3 and Figure 4 is a block diagram showing a power supply device according to an embodiment of the present disclosure;

[0030] Figure 5 is a diagram schematically showing a driving voltage and a discharge circuit according to an embodiment of the present disclosure;

[0031] Figure 6 is a circuit diagram showing a discharge circuit according to an embodiment of the present disclosure;

[0032] Figure 7 is a circuit diagram showing a discharge circuit according to an embodiment of the present disclosure.

[0033] In the following description, reference may be made to the accompanying drawings, and specific examples that may be practiced are shown as examples in the accompanying drawings. Other examples may be adopted and structural changes may be made without departing from the scope of the various examples. DETAILED DESCRIPTION

[0034] Embodiments of the present disclosure are now described in a detailed manner that is easily practiced by those of ordinary skill in the art with reference to the accompanying drawings. However, the present disclosure may be implemented in various other forms and is not limited to the embodiments set forth herein. Throughout the specification and the accompanying drawings, the same or similar reference numerals may be used to refer to the same or similar elements. In addition, for clarity and brevity, well-known functions and configurations are not described in the accompanying drawings and related descriptions.

[0035] The present disclosure provides a circuit having a structure capable of preventing heat generation in a dummy resistor used in a power supply device. An electronic device or a power supply device according to an embodiment may have such a circuit.

[0036] Figure 1 is a block diagram illustrating an electronic device according to an embodiment of the present disclosure.

[0037] According to an embodiment, the electronic device 10 may include a main body 200 and a power supply device 100 .

[0038] In an embodiment, the power supply device 100 may be disposed inside the main body 200 or outside the main body 200. The power supply device 100 disposed inside the main body 200 may be referred to as a power supply. The power supply device 100 disposed outside the main body 200 may be electrically connected to the main body 200. For example, the power supply device 100 may be connected to the main body 200 via a cable. For example, the power supply device 100 may transmit power to the main body 200 wirelessly. In the present disclosure, the manner in which the power supply device 100 transmits power to the main body 200 is not limited to the above examples.

[0039] In an embodiment, the power supply device 100 may be configured as at least some components of the main body 200. The power supply device 100 built into the main body 200 may be referred to as a power supply. The power supply may be electrically connected to at least some other components (e.g., the rectifier 110, the driver 220, and the second controller 240) of the main body 200, but is not limited thereto.

[0040] In an embodiment, the electronic device 10 may be implemented as a display system. In this case, the main body 200 may be a display device. The display device may include, for example, a television, a monitor, and an electronic blackboard, but is not limited thereto.

[0041] In an embodiment, the power supply device 100 may include a rectifier 110 , a power factor correction circuit 120 , and a converter circuit 130 .

[0042] In an embodiment, the rectifier 110 may convert an input AC voltage into a DC voltage. The rectifier 110 may rectify and smooth the AC voltage into a DC voltage of a predetermined level. In an embodiment, a half-wave circuit or a full-wave circuit may be used for rectification. In an embodiment, a capacitor may be connected in parallel to the output terminal of the rectifier 110 for smoothing.

[0043] In an embodiment, the power factor correction circuit 120 may adjust the power factor of the DC voltage input from the rectifier 110. In an embodiment, the power factor correction circuit 120 may output a DC voltage after the power factor is adjusted. In an embodiment, the power factor correction circuit 120 may correct the phase and shape of the DC voltage input from the rectifier 110 to reduce reactive power. In an embodiment, the power factor correction circuit 120 may output a DC voltage through a capacitor connected to an output terminal.

[0044] In an embodiment, the converter circuit 130 may generate a driving voltage Vdrv by converting an input DC voltage. In an embodiment, the converter circuit 130 may include two or more converter circuits 130 (eg, a driving converter circuit 131 and a multi-converter circuit 132), such as Figure 3 In an embodiment, the converter circuit 130 may include a converter circuit 130 (eg, a DC / DC converter circuit), such as Figure 4 As shown below. Figure 3 and Figure 4 The converter circuit 130 is described.

[0045] In an embodiment, the converter circuit 130 can generate a driving voltage Vdrv and a standby voltage Vstb by converting an input DC voltage. In an embodiment, the converter circuit 130 may include one or more output terminals 150. For example, the converter circuit 130 may include a first output terminal 151 for outputting the driving voltage Vdrv and a second output terminal 152 for outputting the standby voltage Vstb. In an embodiment, the converter circuit 130 may output the driving voltage Vdrv or the standby voltage Vstb from the first output terminal 151 or the second output terminal 152.

[0046] In an embodiment, the first capacitor may be electrically connected to two opposite ends of the first output terminal 151 of the converter circuit 130. In an embodiment, the second capacitor may be electrically connected to two opposite ends of the second output terminal 152 of the converter circuit 130. In an embodiment, the driving voltage Vdrv may be stored in the first capacitor connected to the first output terminal 151. In an embodiment, the standby voltage Vstb may be stored in the second capacitor connected to the second output terminal 152.

[0047] In an embodiment, the power supply device 100 may include a discharge circuit 160. The discharge circuit 160 may be connected to the output terminal 150 of the converter circuit 130. In an embodiment, the discharge circuit 160 may be electrically connected to two opposite ends of a first capacitor associated with the driving voltage Vdrv. The discharge circuit 160 may be connected to two opposite ends of the first capacitor to release the driving voltage Vdrv stored in the first capacitor.

[0048] In an embodiment, the driving voltage Vdrv and the standby voltage Vstb output from the converter circuit 130 may be provided to the main body 200. The main body 200 may operate based on the driving voltage Vdrv and the standby voltage Vstb provided or received from the power supply device 100. Without being limited thereto, as an example, the main body 200 may turn on the display panel by the driving voltage Vdrv provided from the power supply device 100. For example, by the standby voltage Vstb provided from the power supply device 100, the main body 200 may keep the provided microphone in an active state, and may perform voice recognition based on the voice received through the microphone.

[0049] In an embodiment, the controller provided in the power supply device 100 may be referred to as a first controller 140. The controller provided in the main body 200 may be referred to as a second controller. In an embodiment, when the power supply device 100 is implemented as at least a part of the main body 200, the first controller 140 may be connected to the second controller ( Figure 2 240) are configured integrally with each other, but are not limited to this.

[0050] In an embodiment, the first controller 140 may be connected to at least one of the converter circuit 130 and the discharge circuit 160. In an embodiment, the first controller 140 may transmit an electrical signal for controlling the converter circuit 130 and the discharge circuit 160. The electrical signal for controlling the converter circuit 130 and the discharge circuit 160 may have a predetermined voltage.

[0051] In an embodiment, the first controller 140 may include one or more of a central processing unit (CPU), a microcontroller unit (MCU), a microprocessing unit (MPU), an application processor (AP), a communication processor (CP), or an ARM processor, or may be defined as such a term. In addition, the first controller 140 may be implemented as a system on a chip (SoC) embedded with a processing algorithm or a large-scale integration (LSI), or in the form of a field programmable gate array (FPGA). In addition, the first controller 140 may be configured as a processing circuit for implementing the above-mentioned forms.

[0052] Figure 2 is a block diagram showing a main body according to an embodiment of the present disclosure.

[0053] refer to Figure 2 , the main body 200 may include a converter circuit 210, a driver 220, a display 230, and a second controller 240. The main body 200 may also include other general components such as a user input device and a sensor.

[0054] In an embodiment, the converter circuit 210 may convert the received driving voltage Vdrv and provide the converted voltages (eg, the first conversion voltage Vdrv1 and the second conversion voltage Vdrv2 ) to components of the body 200 , such as the driver 220 and / or the second controller 240 .

[0055] In an embodiment, the driver 220 may drive the display 230 by the converted first conversion voltage Vdrv1 received from the converter circuit 210. In an embodiment, the driver 220 may drive each pixel by applying a voltage or a current to each pixel constituting the display 230 based on the control of the second controller 240. The display 230 may be implemented as a liquid crystal display (LCD), an organic LED (OLED), an active matrix OLED (AMOLED), a plasma display panel (PDP), a quantum dot (QD), a micro LED, or other various types of flat panel displays or flexible displays.

[0056] In an embodiment, the second controller 240 may include one or more of a central processing unit (CPU), a microcontroller unit (MCU), a microprocessing unit (MPU), an application processor (AP), a communication processor (CP), or an ARM processor, or may be defined as such a term. In addition, the second controller 240 may be implemented as a system on a chip (SoC) embedded with a processing algorithm or a large-scale integration (LSI), or in the form of a field programmable gate array (FPGA). In addition, the second controller 240 may be configured as a processing circuit for implementing the above-mentioned form.

[0057] In an embodiment, the second controller 240 can be configured to receive the power from the power supply device ( Figure 1 The second conversion voltage Vdrv2 and / or the standby voltage Vstb provided by the main body 200 are used to control the overall operation of the main body 200. For example, the processor can copy various software programs or instructions stored in the memory to the RAM and run them to perform various operations.

[0058] In an embodiment, the main body 200 may include a memory. Here, the memory may store various software programs (or applications) for the operation of the main body 200, data and instructions for the operation of the main body 200. At least some programs may be downloaded from an external server or provided from a power supply device via wireless or wired communication. The memory may be accessed by a processor, and the processor may read / write / modify / delete / update the software programs, data and instructions contained in the memory.

[0059] Figure 3 and Figure 4 is a block diagram showing a power supply device according to an embodiment of the present disclosure.

[0060] The following description focuses on Figure 3 and Figure 4 In addition to the Figure 1 The power supply device 100 has differences other than those described above.

[0061] refer to Figure 3 In an embodiment, the converter circuit 130 may include a drive converter circuit 131 that outputs a drive voltage and a multi-converter circuit 132 that outputs a standby voltage. In an embodiment, the first capacitor may be connected to the output terminal 151 of the drive converter circuit 131. In an embodiment, the second capacitor may be connected to the output terminal 152 of the multi-converter circuit 132. In an embodiment, the discharge circuit 160 may be electrically connected only to the first output terminal 151 of the drive converter circuit 131.

[0062] refer to Figure 4 In an embodiment, the converter circuit 130 may include a first output terminal 151 electrically connected to the first capacitor and a second output terminal 152 electrically connected to the second capacitor. In an embodiment, the discharge circuit 160 may be electrically connected to the first output terminal 151 only. Figure 4 An example is shown in which one dummy resistor is coupled to the discharge circuit 160 , but the present invention is not limited thereto, and two or more dummy resistors may be coupled in series or in parallel.

[0063] Figure 5 is a diagram schematically illustrating a driving voltage and a discharge circuit according to an embodiment of the present disclosure.

[0064] In an embodiment, the discharge circuit may include one or more dummy resistors Rdm and a group of discharge transistors M1 connected in series with the dummy resistors Rdm. The group of discharge transistors M1 may be arranged, for example, in the form of source-drain electrodes connected in series.

[0065] In an embodiment, gate electrodes of a group of discharge transistors M1 may be connected in common through a node. In an embodiment, source-drain electrodes located on one side of a group of discharge transistors M1 may be electrically connected to a dummy resistor Rdm. For example, transistors located on one side of a group of discharge transistors M1 may be electrically connected to a dummy resistor Rdm through source-drain electrodes, and the remaining discharge transistors may not be electrically connected to the dummy resistor Rdm.

[0066] In an embodiment, one end of the dummy resistor Rdm may be electrically connected to one end of the first capacitor. For example, one end of the dummy resistor Rdm may be electrically connected to one end of the first capacitor, and the other end of the dummy resistor Rdm may be electrically connected to the source-drain electrode of the above-mentioned discharge transistor.

[0067] In an embodiment, the source-drain electrodes located at the other side of the set of discharge transistors M1 may be electrically connected to the other end of the first capacitor.

[0068] In an embodiment, the power supply device may include: a first controller for switching the electrical connection state of the dummy resistor Rdm. In an embodiment, the first controller may provide a voltage Vdis for activating a group of discharge transistors M1 electrically connected to the dummy resistor Rdm. For example, the first controller may provide the voltage Vdis for activating the group of discharge transistors M1 to a node formed by gate electrodes of the group of discharge transistors M1.

[0069] In an embodiment, the source-drain electrode located on the other side of a group of discharge transistors M1 can be electrically connected to the gate electrode of a group of discharge transistors M1, and one or more resistors are between the source-drain electrode located on the other side of the group of discharge transistors M1 and the gate electrode of the group of discharge transistors M1. Therefore, the resistor disposed between the two can act as a resistor voltage divider. For example, if the first controller provides a voltage Vdis to the gate electrode of a group of discharge transistors M1, the provided voltage can be divided by one or more resistors disposed between the gate electrode and the source-drain electrode. Accordingly, a predetermined voltage can be applied to the gate electrode. Here, the predetermined voltage provided to the gate electrode can have a voltage value sufficient to activate a group of discharge transistors M1.

[0070] In an embodiment, the source-drain electrode located on the other side of the group of discharge transistors M1 can be electrically connected to the gate electrode of the group of discharge transistors M1, and one or more capacitors are located between the source-drain electrode located on the other side of the group of discharge transistors M1 and the gate electrode of the group of discharge transistors M1. In an embodiment, the capacitor can store the voltage Vdis provided by the first controller. Since the capacitor is connected in series with the resistor, the voltage value applied to the capacitor during the stop supply of the voltage Vdis can be reduced based on the RC value. As the voltage applied to the capacitor decreases, the group of discharge transistors M1 can be deactivated again.

[0071] At the same time, while the set of discharge transistors M1 is maintained in an active state, the driving voltage Vdrv stored in the first capacitor can be gradually reduced through the dummy resistor Rdm. When the set of discharge transistors M1 is activated, the dummy current Idm flows through the dummy resistor Rdm, and the voltage stored in the first capacitor can be converted into another energy (such as heat) and released.

[0072] Figure 6 is a circuit diagram showing a discharge circuit according to an embodiment of the present disclosure.

[0073] In an embodiment, the discharge circuit 160 may include one or more dummy resistors Rdm, a group of discharge transistors M1 connected in series with the dummy resistors Rdm, and a group of first control transistors M2 operably connected to gate electrodes of the group of discharge transistors M1 .

[0074] In an embodiment, the gate electrodes of a group of first control transistors M2 may be electrically connected to a first voltage Vdcon. The first voltage Vdcon is a voltage for switching the active / inactive state of a group of first control transistors M2. In an embodiment, the first voltage Vdcon may be received from a first controller. In other words, the first controller may control the active / inactive state of the first control transistors M2 by an electrical signal having the first voltage Vdcon. In the present disclosure, the gate electrodes of a group of first control transistors M2 may be connected to share a node. A group of first control transistors M2 may be electrically connected to a first node N1. Here, the first voltage Vdcon may be provided to the first node N1.

[0075] In an embodiment, the source-drain electrode located on one side of a group of first control transistors M2 may be electrically connected to the gate electrode of a group of discharge transistors M1 via a first voltage-dividing resistor R2. For example, the source-drain electrode located on one side of a group of first control transistors M2 may be connected to the second voltage VCC via an input resistor R1. For example, the source-drain electrode located on one side of a group of first control transistors M2 may be connected to the gate electrode of a group of discharge transistors M1 via a first voltage-dividing resistor R2.

[0076] In an embodiment, the source-drain electrodes at the other side of the group of first control transistors M2 may be electrically connected to the gate electrodes of the group of discharge transistors M1 through the second voltage dividing resistor R3 .

[0077] In an embodiment, the input resistor R1, the first voltage-dividing resistor R2, and the source-drain electrode located on one side of a group of first control transistors M2 may be connected to share a second node N2. In addition, the gate electrodes of a group of discharge transistors M1 may be connected to share a third node N3. In addition, the first voltage-dividing resistor R2 and the second voltage-dividing resistor R3 may be connected through a third node N3.

[0078] In an embodiment, the first controller may provide a second voltage VCC to the second node N2. When a group of first control transistors M2 remain in an inactive state, the voltage VCC provided to the second node N2 may be divided by the input resistor R1, the first voltage-dividing resistor R2, and the second voltage-dividing resistor R3. However, when a group of first control transistors M2 remain in an active state, the voltage VCC provided to the second node N2 may not be divided to the third node N3. In this way, a voltage may be applied or not applied to the gate electrode (i.e., the third node N3) of a group of discharge transistors M1 according to the active state or the inactive state of the group of first control transistors M2.

[0079] In an embodiment, the second voltage VCC may be provided to the discharge circuit 160 by the first controller, but is not limited thereto. For example, the power supply device may include: a first controller for switching the electrical connection state of the dummy resistor Rdm. For example, the first controller may provide a first voltage Vdcon for activating a group of first control transistors M2 to the gate electrodes of a group of first control transistors M2. In addition, the first controller may provide a second voltage VCC for activating a group of discharge transistors M1 to the source-drain electrodes located on one side of the first control transistors.

[0080] In an embodiment, while maintaining the active state of a group of first control transistors M2, the second voltage provided to the source-drain electrode on one side of the first control transistors may not be provided to the gate electrode of a group of discharge transistors M1. In an embodiment, while maintaining the inactive state of a group of first control transistors M2, at least a portion of the second voltage provided to the source-drain electrode on one side of the group of first control transistors may be provided to the gate electrode of a group of discharge transistors M1.

[0081] According to an embodiment, the discharge transistor M1 can be activated while the first control transistor M2 is maintained in an inactive state. Only when the discharge transistor M1 is maintained in an active state, the dummy current Idm flows through the dummy resistor Rdm and can release the current stored in the first capacitor (reference Figure 5 ) in the driving voltage Vdrv.

[0082] Figure 7 is a circuit diagram showing a discharge circuit according to an embodiment of the present disclosure.

[0083] In an embodiment, Figure 5 and Figure 6 The discharge circuit 160 shown may also include a component for protecting the entire circuit from overcurrent flowing through the dummy resistor Rdm. In one case, when the dummy resistor Rdm is damaged, it is impossible to prevent the resistor from catching fire due to heat generated by the resistor itself. Accordingly, when the resistance decreases due to the damage of the resistor, it is necessary to configure that no current flows through the dummy resistor Rdm.

[0084] In an embodiment, the discharge circuit 160 may include one or more dummy resistors Rdm, a group of discharge transistors M1 connected in series with the dummy resistors Rdm, a second control transistor M3 electrically connected to the gate electrodes of the group of discharge transistors M1, and a comparator C having an output end connected to the gate electrode of the second control transistor M3.

[0085] In an embodiment, the discharge circuit 160 may further include a group of first control transistors M2, but the embodiments of the present disclosure are not limited thereto. As described above, but not limited thereto, the discharge circuit 160 may include a group of first control transistors M2. In an embodiment, the source-drain electrode on one side of the second control transistor M3 may be connected to the gate electrode of a group of discharge transistors M1 to form a third node N3. In an embodiment, the third node N3 may be electrically connected to the second node N2. In an embodiment, a first voltage-dividing resistor R2 may be disposed between the first node N1 and the second node N2. In an embodiment, a second voltage-dividing resistor R3 may be disposed between the first node N1 and the source-drain electrode on the other side of the second control transistor M3. In an embodiment, a group of first control transistors M2 may refer to the above combination Figure 6 description to understand.

[0086] Meanwhile, in the embodiment, since the source-drain electrode of the second control transistor M3 is connected to the third node N3, the active or inactive state of the second control transistor M3 may determine the magnitude of the voltage applied to the third node N3. For example, when the second control transistor M3 is maintained in the active state, a voltage sufficient to activate a group of discharge transistors M1 may not be applied to the third node N3. For example, when the second control transistor M3 is maintained in the inactive state, a voltage sufficient to activate a group of discharge transistors M1 may be applied to the third node N3.

[0087] In an embodiment, the source-drain electrode on the other side of the second control transistor M3 may be connected to the source-drain electrode on the other side of a group of discharge transistors M1 via a sensing resistor R4. The sensing resistor R4 may be electrically connected to the source-drain electrode on the other side of the group of discharge transistors M1 to form a fourth node N4. In an embodiment, the voltage detected at the fourth node N4 may be provided to the input terminal of the comparator C. The voltage detected at the fourth node N4 may be referred to as a sensing voltage Vsen.

[0088] In an embodiment, a source-drain electrode at the other side of the first control transistor M1 , a source-drain electrode at the other side of the second control transistor M3 , and the second voltage dividing resistor R3 and the sensing resistor R4 may be connected to share one node.

[0089] Meanwhile, in an embodiment, the comparator C may be configured to control the active / inactive state of the second control transistor M3 based on the sensing voltage Vsen and the preset reference voltage Vref detected at the fourth node N4. For example, when the magnitude of the preset reference voltage Vref (e.g., 2.5V) remains greater than the magnitude of the sensing voltage Vsen, the comparator C may control the second control transistor M3 to be inactive. For example, when the magnitude of the preset reference voltage Vref remains less than the magnitude of the sensing voltage Vsen, the comparator C may control the second control transistor M3 to be active. When the second control transistor M3 remains in an active state, a voltage sufficient to keep a group of discharge transistors M1 in an active state is not applied to the third node N3. Accordingly, a group of discharge transistors M1 is switched to an inactive state, and no current flows through the dummy resistor Rdm and the fourth node N4. Since the current does not flow through the dummy resistor Rdm, overheating or fire caused by the flow of overcurrent in the dummy resistor Rdm can be prevented.

[0090] However, not limited thereto, a circuit element (not shown) for providing a voltage for maintaining the second control transistor M3 in an active state for a predetermined time may be connected to the output terminal of the comparator C. For example, one or more resistors and one or more capacitors connected in parallel with the resistors may be electrically connected to the output terminal of the comparator C.

[0091] However, it is not limited thereto. In an embodiment, one or more resistors and one or more capacitors (not shown) connected in parallel with the resistors may be electrically connected to the gate electrode of the second control transistor M2. In an embodiment, the gate electrodes of a group of discharge transistors M1, a group of first control transistors M2, and a group of second control transistors M3 may be electrically connected to one or more resistors and one or more capacitors connected in parallel with the resistors. In an embodiment, the resistors and capacitors electrically connected to the gate electrodes of a group of discharge transistors M1, a group of first control transistors M2, and a group of second control transistors M3, respectively, may be connected via a common node.

[0092] Without limitation thereto, in an embodiment, one or more capacitors (not shown) may be connected in parallel to the sensing resistor R4. For example, one end of the one or more capacitors connected in parallel to the sensing resistor R4 may be electrically connected to the fourth node N4. In an embodiment, the charge generated due to the overcurrent may be stored in one or more capacitors. Here, the sensing voltage Vsen of the fourth node N4 may be determined based on the charge stored in the capacitor. The determined voltage Vsen may be provided to the input terminal of the comparator C.

[0093] Meanwhile, in an embodiment, the comparator C may be configured to include an operational amplifier (Op-Amp) as at least a part thereof. In an embodiment, the operational amplifier may receive a preset reference voltage Vref through a first input terminal, and receive a sensing voltage Vsen detected from a node between a source-drain electrode located on the other side of a set of discharge transistors M1 and a sensing resistor R4 through a second input terminal. In an embodiment, the operational amplifier may be configured to output a voltage having a magnitude capable of activating the second control transistor M3 when the magnitude of the reference voltage is greater than the magnitude of the sensing voltage Vsen. In an embodiment, the operational amplifier may be configured to output a voltage having a magnitude that cannot activate the second control transistor M3 when the magnitude of the reference voltage is less than the magnitude of the sensing voltage Vsen.

[0094] The electronic device according to various embodiments may be one of various types of electronic devices. The electronic device may include, for example, a display device, a portable communication device (e.g., a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a household appliance. According to an embodiment of the present disclosure, the electronic device is not limited to the above-listed embodiments.

[0095] It should be understood that the various embodiments of the present disclosure and the terms used herein are not intended to limit the technical features set forth herein to specific embodiments, but to include various changes, equivalents or alternatives of the corresponding embodiments. The singular forms "one", "one" and "the" used herein are also intended to include plural forms, unless the context clearly indicates otherwise. As used herein, the term "and / or" should be understood to cover any and all possible combinations of one or more listed items. As used herein, the terms "comprising", "having" and "including" are only used to represent the existence of features, components, parts or combinations thereof described herein, but the use of the term does not exclude the possibility of the existence or addition of one or more other features, components, parts or combinations thereof. As used herein, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C" and "at least one of A, B or C" can include all possible combinations of the items listed in the corresponding phrases. As used herein, terms such as “1st” and “2nd” or “first” and “second” may be used to simply distinguish a corresponding component from another component, and do not limit the components in other aspects such as importance or order.

[0096] As used herein, the term "component" or "module" may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with other terms (e.g., "logic," "logic block," "component," or "circuit"). A component or module may be a single integrated component or its smallest unit or a portion thereof suitable for performing one or more functions. For example, according to an embodiment, a "component" or "module" may be implemented in the form of an application specific integrated circuit (ASIC).

[0097] As used in various embodiments of the present disclosure, the term "if" may be interpreted as "when", "in", "in response to determining" or "in response to detecting" according to the context. Similarly, "if A is determined" or "if A is detected" may be interpreted as "when determining A" or "in response to determining A", or "when detecting A" or "in response to detecting A" according to the context.

[0098] The programs executed by the electronic device 10 described herein may be implemented as hardware components, software components, and / or a combination thereof. The programs may be executed by any system capable of executing computer-readable instructions.

[0099] The software may include a computer program, code, instruction, or a combination of one or more thereof, and may configure a processing device to run as needed, or may instruct a processing device independently or concurrently. The software may be implemented as a computer program including instructions stored in a computer-readable storage medium. The computer-readable storage medium may include, for example, a magnetic storage medium (e.g., a read-only memory (ROM), a random access memory (RAM), a floppy disk, a hard disk, etc.) and an optically readable medium (e.g., a CD-ROM or a digital versatile disc (DVD)). In addition, the computer-readable storage medium may be distributed to a computer system connected via a network, and the computer-readable code may be stored and executed in a distributed manner. The computer program may be distributed (e.g., downloaded or uploaded) online through an application store (e.g., Play Store™), directly between two UEs (e.g., a smartphone). If distributed online, at least a portion of the computer program product may be temporarily generated or at least temporarily stored in a machine-readable storage medium, such as a memory of a manufacturer's server, a server of an application store, or a relay server.

[0100] According to various embodiments, each of the above-mentioned components (e.g., a module or a program) may include a single entity or multiple entities. Some of the multiple entities may be respectively set in different components. According to various embodiments, one or more of the above-mentioned components may be omitted, or one or more other components may be added. Alternatively or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, according to various embodiments, the integrated component may still perform one or more functions of each of the multiple components in the same or similar manner as performed by a corresponding one of the multiple components before integration. According to various embodiments, the operations performed by a module, a program or another component may be performed sequentially, in parallel, repeatedly or heuristically, or one or more of the operations may be performed in a different order or omitted, or one or more other operations may be added.

Claims

1. An electronic device, include: A power supply device, generating a driving voltage and a standby voltage; as well as a main body, which operates based on the driving voltage and the standby voltage received from the power supply device, Wherein, the power supply device comprises: at least one converter, outputting at least one of the driving voltage and the standby voltage from an output terminal; a first capacitor connected to the at least one converter to store the driving voltage; a second capacitor connected to the at least one converter to store the standby voltage; and A discharge circuit is electrically connected to the first capacitor to discharge the driving voltage stored in the first capacitor.

2. The electronic device according to claim 1, in, The discharge circuit includes at least one dummy resistor and a group of discharge transistors connected in series with the at least one dummy resistor.

3. The electronic device according to claim 2, in, The power supply device includes: a first controller that switches the electrical connection state of the at least one dummy resistor, and The first controller provides a voltage for activating the set of discharge transistors electrically connected to the at least one dummy resistor.

4. The electronic device according to claim 2, in, Gate electrodes of the group of discharge transistors are commonly connected through one node, and source-drain electrodes on one side of the group of discharge transistors are electrically connected to the at least one dummy resistor.

5. The electronic device according to claim 1, comprising a first voltage-dividing resistor and a second voltage-dividing resistor, in, The discharge circuit includes at least one dummy resistor, a set of discharge transistors connected in series with the at least one dummy resistor, and a set of first control transistors operatively connected to gate electrodes of the set of discharge transistors, and wherein the source-drain electrode located at one side of the group of first control transistors is electrically connected to the gate electrode of the group of discharge transistors via the first voltage dividing resistor, and The source-drain electrodes on the other side of the group of first control transistors are electrically connected to the gate electrodes of the group of discharge transistors via the second voltage dividing resistor.

6. The electronic device according to claim 5, in, The power supply device includes: a first controller, which switches the electrical connection state of the at least one dummy resistor, and the first controller provides a first voltage for activating the group of first control transistors to the gate electrodes of the group of first control transistors, and provides a second voltage for activating the group of discharge transistors to the source-drain electrodes located on one side of the group of first control transistors.

7. The electronic device according to claim 6, in, When the group of first control transistors is maintained in an active state, the second voltage supplied to the source-drain electrodes on one side of the group of first control transistors is not supplied to the gate electrodes of the group of discharge transistors.

8. The electronic device according to claim 6, in, When the group of first control transistors is maintained in an inactive state, at least a portion of the second voltage supplied to the source-drain electrodes on one side of the group of first control transistors is supplied to the gate electrodes of the group of discharge transistors.

9. The electronic device according to claim 1, in, The discharge circuit comprises: at least one dummy resistor; a set of discharge transistors connected in series with the at least one dummy resistor; a second control transistor electrically connected to the gate electrodes of the set of discharge transistors; and a comparator having an output terminal connected to the gate electrode of the second control transistor, Wherein, the source-drain electrode on one side of the second control transistor is connected to the gate electrode of the group of discharge transistors, The source-drain electrode on the other side of the second control transistor is connected to the source-drain electrode on the other side of the group of discharge transistors via a sensing resistor, and The comparator receives a preset reference voltage through a first input terminal, and receives a sensing voltage detected from a node between the sensing resistor and the source-drain electrodes located on the other side of the group of discharge transistors through a second input terminal.

10. The electronic device according to claim 9, comprising a sensing resistor, in, The source-drain electrodes on one side of the group of discharge transistors are connected to the at least one dummy resistor, The source-drain electrode on the other side of the set of discharge transistors is connected to the sensing resistor, and The at least one dummy resistor is electrically connected to one end of the first capacitor, and the sensing resistor is electrically connected to the other end of the first capacitor.

11. The electronic device according to claim 9, in, The discharge circuit includes a set of first control transistors, and The source-drain electrode on one side of the second control transistor is connected to the gate electrode of the group of discharge transistors, and the two form a first node. The first node is electrically connected to a second node corresponding to one side of the group of first control transistors, A first voltage dividing resistor is provided between the first node and the second node, and A second voltage dividing resistor is provided between the first node and the source-drain electrode on the other side of the second control transistor.

12. The electronic device according to claim 1, comprising a display, in, The subject includes: a converter circuit for converting the driving voltage received from the power supply device and outputting the converted power; a driver that controls driving of the display based on the converted power; and A second controller controls an operation based on the converted power and the standby voltage.

13. The electronic device according to claim 1, in, The at least one converter includes a first output terminal electrically connected to the first capacitor and a second output terminal electrically connected to the second capacitor, and The discharge circuit is electrically connected only to the first output terminal.

14. The electronic device according to claim 1, in, The at least one converter includes a first converter circuit for outputting the drive voltage and a second converter circuit for outputting the standby voltage, The first capacitor is connected to the output terminal of the first converter circuit, and the second capacitor is connected to the output terminal of the second converter circuit, and The discharge circuit is electrically connected only to the first output terminal.

15. A power supply device, include: at least one converter outputting at least one of a driving voltage and a standby voltage from an output terminal; a first capacitor connected to the at least one converter to store the driving voltage; a second capacitor connected to the at least one converter to store the standby voltage; a discharge circuit, electrically connected to the first capacitor to discharge the driving voltage stored in the first capacitor; a first voltage dividing resistor; as well as a second voltage dividing resistor; Wherein, the discharge circuit comprises: at least one dummy resistor; a set of discharge transistors connected in series with the at least one dummy resistor; and a set of first control transistors operatively connected to gate electrodes of the set of discharge transistors, and wherein the source-drain electrode located at one side of the group of first control transistors is electrically connected to the gate electrode of the group of discharge transistors via the first voltage dividing resistor, and The source-drain electrodes on the other side of the group of first control transistors are electrically connected to the gate electrodes of the group of discharge transistors via the second voltage dividing resistor.

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