KR-20260063630-A - CIRCUITRY TO REDUCE RESIDUAL VOLTAGE OF ELECTRONIC COMPONENT AND ELECTRONIC DEVICE COMPRISING THEREOF

Abstract

According to one embodiment, an electronic device may include an electronic component. The electronic device may include a thermistor. The resistance of the thermistor may increase as the temperature of the thermistor increases. The electronic device may include a switch configured to connect the thermistor to a node included in a power path for transmitting a power signal to the electronic component. The electronic device may include a control circuit configured to control the switch. The control circuit may be configured to control the switch to connect the thermistor to the node in order to reduce the power signal transmitted through the power path based on the deactivation of the electronic device. The control circuit may be configured to control the switch so that the voltage of the thermistor connected to the node is maintained below a reference voltage.

Inventors

• 김건우
• 김문영
• 이정호
• 이진형

Assignees

• 삼성전자주식회사

Dates

Publication Date

20260507

Application Date

20241030

Claims (20)

1. In electronic devices, Electronic components; Thermistor, the resistance of the thermistor increases as the temperature of the thermistor increases; A switch configured to connect the thermistor to a node included in a power path for transmitting a power signal to the electronic component; and It includes a control circuit configured to control the above switch, and The above control circuit is, Based on the deactivation of the electronic device, to reduce the power signal transmitted through the power path, the switch is controlled to connect the thermistor to the node; and Configured to control the switch so that the voltage of the thermistor connected to the node is maintained below a reference voltage, Electronic device.
2. In claim 1, the switch is, A transistor comprising a drain electrode connected to the node, a source electrode connected to the thermistor, and a gate electrode electrically connected to the control circuit. Electronic device.
3. In claim 2, A heat sink further comprising the above transistor and a heat sink in contact with the transistor Electronic device.
4. In claim 2, A Zener diode further comprising a cathode connected to the gate electrode and a grounded anode, Electronic device.
5. In claim 1, the control circuit comprises a shunt regulator, Electronic device.
6. In claim 5, the control circuit is, A first resistor comprising one end connected to a node between the switch and the thermistor; It further includes a second resistor comprising one end connected to the other end of the first resistor and the other end grounded, and The above shunt regulator is, Configured to control the switch using the voltage at the node between the first resistor and the second resistor. Electronic device.
7. In claim 5, the reference voltage is the reference voltage of the shunt regulator, Electronic device.
8. In claim 1, the control circuit is, The voltage between the switch and the thermistor is compared with a second reference voltage that exceeds the first reference voltage; Configured to transmit a fault signal to disable the electronic device based on identifying that the voltage between the switch and the thermistor exceeds the second reference voltage. Electronic device.
9. In claim 1, It further includes a processor configured to control the above electronic components, and The above processor is, Configured to transmit a control signal indicating the deactivation of the electronic device to the control circuit in response to an input for deactivating the electronic device. Electronic device.
10. In a method for an electronic device, the electronic device comprises an electronic component, a thermistor, and a switch configured to control an electrical connection associated with the thermistor. An operation of receiving an input to disable the above electronic device; An operation to control the switch so that, based on the above input, a power signal transmitted to the electronic component is transmitted to the thermistor; and The operation of controlling the switch such that, while the power signal is transmitted to the thermistor, the voltage of the power signal transmitted to the thermistor is maintained below a reference voltage, method.
11. In claim 10, the switch is, A transistor comprising a drain electrode connected to a node in a power path configured to transmit the power signal to the electronic component, a source electrode connected to the thermistor, and a gate electrode electrically connected to the control circuit. method.
12. In claim 11, the electronic device is, A heat sink further comprising the above transistor in contact with the above transistor method.
13. In claim 10, the electronic device is, A resistor further comprising one end connected to the above switch and the other end grounded, method.
14. In claim 10, the operation of controlling the switch so that the voltage of the power signal is maintained at or below the reference voltage is, Based on identifying the voltage of the power signal transmitted to the thermistor which is greater than or equal to the reference voltage, the operation of controlling the switch to reduce the current of the thermistor is included. method.
15. In claim 10, The above reference voltage is a first reference voltage, and The method further includes an operation to disable the electronic device based on identifying that the voltage of the power signal transmitted to the thermistor exceeds a second reference voltage that exceeds the first reference voltage. method.
16. In electronic devices, Power circuit; Electronic components; Thermistor, the resistance of the thermistor increases as the temperature of the thermistor increases; A switch configured to connect the thermistor to a node included in a power path for transmitting a power signal from the power circuit to the electronic component; and It includes a control circuit configured to control the above switch, and The above control circuit is, Controlling the switch so that the thermistor is electrically disconnected from the power path within a first state for activating the electronic component; and Configured to control the switch so that, within a second state different from the first state, the voltage of the thermistor is maintained below a reference voltage. Electronic device.
17. In claim 16, the control circuit is, In the second state above, to reduce the power signal transmitted through the power path, the switch is controlled to connect the thermistor to the node; and Configured to control the switch so that the voltage of the thermistor connected to the node is maintained below a reference voltage, Electronic device.
18. In claim 16, the switch is, A transistor comprising a drain electrode connected to the node, a source electrode connected to the thermistor, and a gate electrode electrically connected to the control circuit. Electronic device.
19. In claim 18, A heat sink further comprising the above transistor and a heat sink in contact with the transistor Electronic device.
20. In claim 18, A Zener diode further comprising a cathode connected to the gate electrode and a grounded anode, Electronic device.

Description

Circuit for reducing residual voltage of an electronic component and electronic device comprising the same The present disclosure relates to a circuit for reducing residual voltage of an electronic component and an electronic device including the same. An electronic device may receive a power signal from an infrastructure for providing power, referred to as a power distribution system. Upon receiving the power signal, the electronic device may execute various functions based on the design of the electronic device based on the power signal. The power signal received by the electronic device is an alternating current (AC) signal. The electronic device may include a circuit (e.g., power circuit) for obtaining a direct current (DC) signal from the AC signal to be applied to electronic components corresponding to the functions. In an electronic device such as a TV, an electronic component (e.g., display panel) for outputting an image may require a DC signal of a voltage of tens of volts or more for operation. The voltage applied to the electronic component may be reduced at a slow rate or maintained by electrical energy stored in circuit elements (e.g., capacitors and/or inductors) within the electronic component even after the electronic device is turned off. When a user touches the electronic device that is turned off, if the voltage of the electronic component is not 0 V, the voltage of the electronic component may be applied to the user. The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure. FIG. 1 illustrates an electronic device according to one embodiment. FIG. 2 illustrates a block diagram showing an exemplary hardware configuration of an electronic device according to one embodiment. FIG. 3 illustrates an exemplary circuit diagram of a discharge circuit included in an electronic device according to one embodiment. FIG. 4 illustrates graphs for explaining the voltage and/or current of nodes and/or circuit elements within an electronic device associated with a discharge circuit. FIG. 5 illustrates an exemplary circuit diagram of a discharge circuit including a shunt regulator. FIG. 6 illustrates a first example of a discharge circuit included in an electronic device according to one embodiment. FIG. 7 illustrates a second example of a discharge circuit included in an electronic device according to one embodiment. FIG. 8 illustrates a third example of a discharge circuit included in an electronic device according to one embodiment. FIG. 9 illustrates a fourth example of a discharge circuit included in an electronic device according to one embodiment. Hereinafter, various embodiments of this document will be described with reference to the attached drawings. The various embodiments of this document and the terms used therein are not intended to limit the technology described in this document to specific embodiments and should be understood to include various modifications, equivalents, and/or substitutions of such embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar components. A singular expression may include a plural expression unless the context clearly indicates otherwise. In this document, expressions such as "A or B," "at least one of A and/or B," "A, B or C," or "at least one of A, B and/or C" may include all possible combinations of items listed together. Expressions such as "first," "second," "first," or "second" may modify the components, regardless of order or importance, and are used only to distinguish one component from another and do not limit the components. When it is mentioned that a certain (e.g., 1st) component is "(functionally or telecommunicationally) connected" or "connected" to another (e.g., 2nd) component, said certain component may be directly connected to said other component or connected through another component (e.g., 3rd component). As used in this document, the term "module" includes a unit composed of hardware and may be used interchangeably with terms such as, for example, component, and/or circuit. A module may be a component formed as a whole, or a minimum unit or part thereof that performs one or more functions. For example, a module may be composed of an application-specific integrated circuit (ASIC). FIG. 1 illustrates an electronic device (101) according to one embodiment. The electronic device (101) may be described as an electronic device capable of displaying images. For example, the electronic device (101) may include a TV (television), a monitor, a computer, a smartphone, a tablet PC (personal computer), a portable media player, a wearable device, a video wall, a digital photo frame, etc. The electronic device (101) may be referred to as a display device. For convenience of explanation, the foll