WO2023033321A1 - 인덕터의 결합도와 관련된 구조를 가지는 코어를 포함하는 트랜스포머를 포함하는 디스플레이 장치 - Google Patents
인덕터의 결합도와 관련된 구조를 가지는 코어를 포함하는 트랜스포머를 포함하는 디스플레이 장치 Download PDFInfo
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- WO2023033321A1 WO2023033321A1 PCT/KR2022/008117 KR2022008117W WO2023033321A1 WO 2023033321 A1 WO2023033321 A1 WO 2023033321A1 KR 2022008117 W KR2022008117 W KR 2022008117W WO 2023033321 A1 WO2023033321 A1 WO 2023033321A1
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- inductor
- inductor assembly
- assembly
- transformer
- display device
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
Definitions
- the following descriptions relate to a display device including a transformer including a core having a structure related to a coupling degree of an inductor.
- a power circuit of the display device may generate power signals having different voltages.
- a display device includes a transformer used to generate power signals for simultaneously driving a plurality of circuits included in the display device, and a method for utilizing inductive coupling between inductors included in the transformer may be required.
- a display device includes a first surface and a protruding portion protruding from the first surface along a direction in which the first surface faces, perpendicular to the direction.
- a cross section of the first portion of the protrusion having a first area
- a cross section of a second portion of the protrusion between the first portion and the first surface having a second area larger than the first area
- a first bobbin contacting an outer circumference of the first portion of the core and including a first opening corresponding to the first area and an inductor wound on the first bobbin.
- a first inductor assembly (a first inductor sub-assembly) and a second bobbin including a second opening corresponding to the second area so as to contact the outer circumference of the second portion of the core, and an inductor wound on the second bobbin
- a transformer including a second inductor assembly including an inductor may be included.
- a display device includes a first surface and a protrusion protruding from the first surface along a direction in which the first surface faces, and having a cross section perpendicular to the direction and having a first area.
- a first core including a protruding portion, a first bobbin including a first opening corresponding to the first area so as to contact the outer circumference of the protrusion of the first core, and an inductor wound on the first bobbin.
- a first inductor assembly including a second surface facing and spaced apart from the first surface of the first core and protruding from the second surface along a direction in which the second surface faces, perpendicular to the direction in which the second surface faces.
- a second core including a protruding portion having a second area, the cross section of which is distinct from the first area, and a second opening in contact with the outer circumference of the protruding portion of the second core and corresponding to the second area. It may include a transformer including a second inductor assembly including a second bobbin and an inductor wound on the second bobbin.
- a display device may increase leakage inductance generated by inductive coupling between inductors included in a transformer to a degree necessary for driving a circuit connected to the transformer.
- FIG. 1 is a block diagram illustrating an exemplary configuration of a display device according to an embodiment.
- FIGS. 2A to 2B are exploded perspective views and perspective views of a transformer included in a display device according to an exemplary embodiment.
- FIG 3 is an exemplary diagram for explaining an inductor assembly included in a display device according to an exemplary embodiment.
- FIGS. 4A to 4B are perspective views illustrating exemplary cores of a transformer included in a display device according to an exemplary embodiment.
- FIG. 5 is a cross-sectional view of an embodiment of a transformer taken along the line A-A' of FIG. 2B.
- 6A to 6B are diagrams for explaining an example of a transformer included in a display device according to an exemplary embodiment.
- FIGS. 7A to 7B are diagrams illustrating an example of a transformer included in a display device according to an exemplary embodiment.
- FIG. 8 is a diagram illustrating an equivalent circuit of a transformer included in a display device according to an exemplary embodiment.
- FIGS. 9A to 9B are diagrams for explaining an example of a transformer included in a display device according to an exemplary embodiment.
- FIG. 10 is a circuit block diagram illustrating an operation of a transformer included in a display device according to an exemplary embodiment.
- FIG. 11 is an exemplary diagram for explaining an operation of a transformer included in a display device according to an exemplary embodiment.
- 12A to 12D are exemplary diagrams for explaining an operation of a transformer included in a display device according to an exemplary embodiment.
- FIGS. 13A to 13B are diagrams for explaining another example of a transformer included in a display device according to an exemplary embodiment.
- the components are not limited.
- a (e.g., first) element is referred to as being "(functionally or communicatively) coupled to" or “connected to” another (e.g., second) element, that element refers to the other (e.g., second) element. It may be directly connected to the component or connected through another component (eg, a third component).
- module used in this document includes units including hardware, software, or firmware, and may be used interchangeably with terms such as, for example, logic, logical blocks, parts, or circuits.
- a module may be an integral part or a minimum unit or part thereof that performs one or more functions.
- the module may be composed of an application-specific integrated circuit (ASIC).
- ASIC application-specific integrated circuit
- the display device 101 may be an electronic device capable of displaying images.
- the display device 101 may include a television (TV), a computer, a smart phone, a tablet, a portable media player, a wearable device, a video wall, an electronic picture frame, and the like.
- the display device 101 may be implemented in various types of devices, such as an image processing device including a set-top box without a display, a household appliance including a refrigerator and a washing machine, and an information processing device including a computer body. there is.
- an image processing device including a set-top box without a display
- a household appliance including a refrigerator and a washing machine
- an information processing device including a computer body.
- a display device 101 may include at least one of a power supply circuit 110, a first circuit 130, a second circuit 140, and a display panel 150.
- the power circuit 110, the first circuit 130, the second circuit 140, and the display panel 150 are electronic elements such as, for example, a power line and/or a communication bus. (electronically and/or operably coupled with each other) by means of an electronic component.
- the type and/or number of hardware components included in the display device 101 are not limited to those shown in FIG. 1 .
- the display device 101 may include only some of the hardware components shown in FIG. 1 .
- a power circuit 110 of a display device 101 may be electrically connected to a power source 120 provided from a power distribution system.
- the display device 101 may include a power plug electrically connecting the power circuit 110 and the power source 120 to each other.
- the power circuit 110 of the display device 101 may receive an alternating current signal (AC signal) from the power source 120 .
- the AC signal received by the power circuit 110 is a power signal having a voltage that changes over time.
- the voltage of the AC signal has a designated frequency (eg, 60 Hz) and a designated amplitude (eg, 220V and/or 110V) according to a sinusoidal wave.
- the power circuit 110 of the display device 101 generates a direct current signal (DC signal) having a constant voltage using an AC signal received from the power source 120. and/or another AC signal having a period and/or amplitude independent of the AC signal.
- the DC signal may correspond to a power signal having a voltage maintained independently of a change in time.
- the power circuit 110 may simultaneously output a plurality of power signals having different voltages. Multiple outputs of the power circuit 110 may mean that the power circuit 110 outputs a plurality of power signals having different voltages.
- the different voltages of the power signals output from the power circuit 110 drive each of the different circuits (eg, the first circuit 130 and the second circuit 140) included in the display device 101. can correspond to the voltage specified for To drive each of the different circuits included in the display device 101, the power circuit 110 may generate power signals having voltages corresponding to each of the circuits.
- the display device 101 may include a first circuit 130 for driving the display panel 150 .
- the display device 101 may include a display panel 150 that is controlled by the first circuit 130 and outputs an image. Using the display panel 150, the display device 101 may output visualized information to the user.
- the display panel 150 may include a flat panel display (FPD).
- the FPD may include a Liquid Crystal Display (LCD), a Plasma Display Panel (PDP), and/or one or more Light Emitting Diodes (LEDs).
- the LED may include organic LED (OLED).
- the display panel 150 may include electronic paper.
- the first circuit 130 may include a timing controller that generates a timing signal for outputting an image on the display panel 150 .
- the first circuit 130 may include an LED driving circuit for driving one or more LEDs included in the display panel 150 .
- the LEDs may be included in the backlight and/or pixels of the display panel 150 .
- the LED driving circuit may adjust the voltage of a power signal to be provided to one or more LEDs in order to adjust the brightness of one or more LEDs included in the display panel 150 .
- the power signal may be provided from the power circuit 110 independently of other power signals to be supplied to other circuits distinct from the first circuit 130 among multiple outputs of the power circuit 110 .
- a display device 101 may include a second circuit 140 that is distinct from a first circuit 130 for driving a display panel 150 .
- the second circuit 140 may perform a function different from that of the first circuit 130 (eg, a function of adjusting a voltage of a power signal to be provided to an LED).
- the second circuit 140 may generate a signal representing an image to be displayed on the display panel 150 to the first circuit 130 .
- the second circuit 140 may include a processor and/or memory for executing one or more functions of the display device 101 .
- the second circuit 140 can be electrically connected with one or more switches for obtaining user input.
- the one or more switches may be at least partially exposed through the housing of the display device 101 (may be exposed outside at least partially).
- the second circuit 140 may include a communication circuit for communicating with an external electronic device for obtaining user input, such as a remote control.
- the communication circuit may communicate with an external electronic device based on a wireless communication protocol such as infrared communication, Bluetooth, and/or Wi-Fi.
- the second circuit 140 may include a printed circuit board (PCB) including at least one of a chipset, processor, memory, electronic component, or wiring for executing one or more functions.
- the second circuit 140 may have a system-on-chip (SoC) form.
- SoC system-on-chip
- the first circuit 130 may control one or more pixels included in the display panel 150 based on a signal received from the second circuit 140 .
- the display panel 150 may include a plurality of pixels arranged in a two-dimensional matrix.
- the first circuit 130 may control at least one pixel included in a corresponding row or column among a plurality of pixels based on the signal. Controlling at least one pixel by the first circuit 130 may include an operation of adjusting luminance, brightness, and/or color of at least one pixel.
- the display device 101 may include an output means for outputting information in a form other than a visualized form.
- the display device 101 operates by a power signal provided from the power circuit 110 and may further include one or more speakers for outputting an acoustic signal.
- a display device 101 includes a first circuit 130, a second circuit 140, and a power circuit providing power to a load such as a display panel 150 ( 110) may be included.
- the display device 101 includes at least one of a rectifier circuit 112, a power-factor corrector 114, an electromagnetic interference (EMI) filter 116, and/or a transformer 118 in the power circuit 110. may contain one.
- Hardware components included in the power supply circuit 110 are not limited to the example of FIG. 1 , and for example, the power supply circuit 110 further includes circuits such as a DC-DC conversion circuit, a lightning protection circuit, a varistor, and a surge arrestor. can include
- the rectifier 112 may rectify the AC signal of the power source 120 and output a rectified alternate current signal.
- rectifier 112 may include one or more diodes.
- the rectifier 112 may include a bridge diode circuit that performs full-wave rectification on an AC signal of the power source 120 .
- the power source 120 may perform half-wave rectification on an AC signal.
- the circuit included in the rectifier 112 is not limited to the bridge diode and may include a non-bridge circuit.
- the EMI filter 116 may remove or reduce noise included in the AC signal of the power source 120.
- the noise may include a voltage ripple caused by another frequency component different from the frequency component of the AC signal intended by a producer generating the AC signal.
- an AC signal having reduced noise by the EMI filter 116 may be provided to the rectifier 112 .
- the EMI filter 116 may include a line filter.
- the power factor corrector 114 may include various circuits for adjusting a power factor (PF) of an AC signal and/or a DC signal provided to the power supply circuit 110 .
- Power factor can refer, for example, to the ratio between the active power consumed by a load and the apparent power provided to the load.
- the power factor corrector 114 may adjust the power factor by reducing reactive power of an AC signal.
- the power factor corrector 114 may adjust the power factor by increasing the active power of the AC signal.
- the power factor corrector 114 may adjust the power factor by synchronizing the phases of the voltage and current of the AC signal received by the display device 101 .
- the display device 101 may obtain a DC signal from an AC signal of the power source 120 based on the power factor corrector 114 .
- the display device 101 In a state in which a DC signal is obtained from an AC signal, the display device 101 according to an embodiment is based on the power factor corrector 114 and is connected to the input side of the display device 101 (eg, the power source 120).
- the power factor at one end of the display device 101 may be changed.
- the display device 101 receives current based on the phase of the voltage of the AC signal of the power source 120, and calculates the power factor of a power line connecting the power source 120 and the display device 101.
- a power factor in a power line connecting the power source 120 and the display device 101 may exceed, for example, a specified power factor threshold related to harmonic regulation.
- the display device 101 may include a transformer 118 .
- transformer 118 the relative position between the plurality of inductors may be determined by one or more cores.
- the structure of the transformer 118 included in the power supply circuit 110 of the display device 101 according to an embodiment is shown in FIGS. 2A to 2B, 5, 6A, 7A to 7B, 9A and 13A. It will be described later in more detail.
- inductance required for each of the different circuits is obtained from a transformer 118 that generates different power signals to be supplied to each of the different circuits of the display device 101.
- the inductance may include, for example, leakage inductance and/or magnetization inductance generated by inductive coupling between a plurality of inductors included in the transformer 118 .
- the leakage inductance and/or the magnetization inductance may be generated based on an interaction between magnetic fields induced in a plurality of inductances included in the transformer 118 .
- An equivalent circuit of the transformer 118 based on the leakage inductance and/or the magnetization inductance will be described later in detail with reference to FIGS. 8, 9B and/or 13B.
- An operation performed by the display device 101 according to an embodiment based on the inductance provided from the transformer 118 will be described later in detail with reference to FIGS. 10, 11 and/or 12a to 12d.
- the display device 101 uses the transformer 118 included in the power supply circuit 110 to meet the requirements of each of the different circuits included in the display device 101.
- Other inductances eg, leakage inductance
- inductances obtained from transformer 118 may be used to reduce the number of inductors included in the different circuits.
- the display device 101 according to an exemplary embodiment uses the transformer 118 to provide the display device 101 with each other required by each of the different circuits. It is possible to generate power signals having different voltages.
- the structure of the transformer 118 included in the display device 101 according to an exemplary embodiment will be described with reference to FIGS. 2A and 2B.
- FIGS. 2A to 2B are block diagrams of an exemplary transformer 118-1 included in a display device according to an embodiment.
- the display devices of FIGS. 2A and 2B may correspond to the display device 101 of FIG. 1 .
- the transformer 118-1 of FIGS. 2A and 2B may correspond to an example of the transformer 118 of FIG. 1 .
- FIG. 2A is an exploded perspective view of a transformer 118-1 included in a display device according to an exemplary embodiment.
- the transformer 118-1 may include cores 210 and 220 and inductor assemblies 230 disposed between the cores 210 and 220.
- the inductor assemblies 230 included in the transformer 118-1 may include two or more inductor sub-assemblies. Referring to the example of FIG. 2A , as an example of the inductor assemblies 230 included in the transformer 118-1, inductor assemblies 232, 234, 236, and 238 are shown.
- Each of the inductor assemblies 230 of the transformer 118-1 may include a wire through which current input to the transformer 118-1 flows and a bobbin around which the wire is wound.
- the conductive wire may form an inductor.
- magnetic flux may be formed in a space adjacent to the inductor assemblies 230 .
- the inductor assemblies 230 may further include members to insulate each other. Structures of the inductor assemblies 230 included in the transformer 118-1 according to an exemplary embodiment will be described later in detail with reference to FIG. 3 .
- Each of the inductor assemblies 230 may include one or more pins corresponding to a portion of a wire wound on a bobbin of the inductor assembly extending to the outside of the inductor assembly.
- pins 232-1, 234-1, 236-1, and 238-1 included in each of the inductor assemblies 232, 234, 236, and 238 are illustrated. 2A, the direction of the pins 232-1 included in the inductor assembly 232 is in the -x direction, and the pins 234-1, 236 included in the inductor assemblies 234, 236, and 238 -1, 238-1) direction (+x direction).
- the direction of the inductor assemblies 232, 234, 236, and 238 indicated by the pins 232-1, 234-1, 236-1, and 238-1 is, in the transformer 118-1, the inductor assemblies ( 232, 234, 236, and 238) may be related to inductive coupling of inductors included in each.
- the orientation of the inductor assemblies 232, 234, 236, and 238 is not limited to the embodiment shown in FIG. 2A, and the positions of the inductor assemblies 232, 234, 236, and 238 are distinct from the embodiment of FIG. 2A. The relationship will be described later in FIG. 13A.
- Transformer 118-1 may include one or more cores 210 and 220 for positioning inductor assemblies 230 within transformer 118-1.
- the cores 210 and 220 may include ferrite cores including at least one of manganese-zinc (MnZn) ferrite and nickel-zinc (NiZn) ferrite. While current flows through the inductor assemblies 230 of the transformer 118-1, magnetic flux may be formed in the cores 210 and 220 included in the transformer 118-1. Magnetic flux formed in the cores 210 and 220 may be changed based on the shape of each of the cores 210 and 220 .
- the magnetic flux changed based on the shape of each of the cores 210 and 220 may cause leakage inductance and/or magnetization inductance based on inductive coupling of the inductor assemblies 230 included in the transformer 118-1. there is.
- the cores 210 and 220 may have different shapes, and the inductor assemblies 230 are centered on a plane in contact with the cores 210 and 220 in the transformer 118-1. It can be placed asymmetrically.
- the core 210 of the transformer 118-1 includes a first surface and a protruding portion protruding from the first surface along a direction in which the first surface faces.
- a cross section of the first portion of the protrusion perpendicular to the direction in which the first surface of the core 210 faces may have a first area.
- the cross section of the second part of the protruding part between the first part of the protruding part and the first surface of the core 210 perpendicular to the direction in which the first surface of the core 210 faces It may have a second area larger than the first area.
- the transformer 118-1 includes a bobbin including an opening corresponding to the first area so as to contact the outer circumference of the first portion of the core 210. and an inductor assembly 232 including an inductor wound around the bobbin.
- the transformer 118-1 according to an embodiment includes a bobbin including an opening corresponding to the second area so as to contact the outer circumference of the second portion of the core 210 and an inductor wound around the bobbin.
- An inductor assembly 234 may be included.
- the inductor assembly 234 among the inductor assemblies 232 and 234 may be disposed adjacent to the first surface where the protrusion extends.
- the inductor assembly 232 may be spaced apart from the first surface of the core 210 .
- a distance between the inductor assembly 232 and the first surface of the core 210 may correspond to a length of a second portion of the protrusion of the core 210 having a second area distinct from the first area.
- an inductor assembly 234 may fill a space between the inductor assembly 232 and the first surface of the core 210 .
- the opening of the inductor assembly 234 is formed on at least a portion of the opening of the inductor assembly 232. may overlap.
- inductor assembly 234 and inductor assembly 232 may abut each other such that an opening of inductor assembly 234 overlaps at least a portion of an opening of inductor assembly 232 .
- the protrusion of the core 210 may penetrate a portion where the opening of the inductor assembly 234 and the opening of the inductor assembly 232 overlap.
- a transformer 118-1 includes a bobbin having an opening corresponding to an outer circumference of an inductor assembly 232 and inductor assemblies 236 and 238 including an inductor wound around the bobbin. ) may be included. Within transformer 118 - 1 , inductor assemblies 236 and 238 may abut different portions of the circumference of inductor assembly 232 .
- FIG. 2B is a perspective view of a transformer 118-1 included in a display device according to an exemplary embodiment.
- inductor assemblies 230 included in the transformer 118-1 may be disposed in a space between the cores 210 and 220.
- inductive coupling between inductors included in each of the inductor assemblies 230 may be formed.
- leakage inductance and/or magnetizing inductance may be generated.
- leakage inductance and/or magnetization inductance may be generated by interaction between the magnetic fluxes.
- the leakage inductance and/or the magnetization inductance may be used to drive another circuit (eg, an LLC resonant converter) connected to the transformer 118-1.
- another circuit eg, an LLC resonant converter
- FIGS. 11 and 12A to 12D an operation utilizing leakage inductance and/or magnetization inductance generated in the transformer 118-1 is illustrated in FIGS. 11 and 12A to 12D. will be described later.
- At least one of the inductor assemblies 230 may form a positional relationship with the other one to lower the coupling degree.
- the degree of coupling may mean a coupling coefficient of inductive coupling between inductors.
- leakage inductance between the at least two inductors may increase.
- the positional relationship may be determined based on the shape of at least one of the cores 210 and 220 . For example, as the core 210 of the cores 210 and 220 has a shape for increasing the leakage inductance, the increased leakage inductance by the core 210 is connected to another circuit connected to the transformer 118-1. can be used to drive In this case, an inductor included to increase inductance in the other circuit may be removed.
- FIG. 3 is a perspective view of an inductor assembly 230 included in a display device according to an exemplary embodiment.
- the display device of FIG. 3 may correspond to the display device 101 of FIG. 1 .
- the inductor assembly 230 of FIG. 3 may include the inductor assemblies 230 of FIG. 2A .
- Each of states 310 , 320 , 330 of FIG. 3 may correspond to a portion of a process for manufacturing inductor assembly 230 according to one embodiment.
- a bobbin 311 to be included in the inductor assembly 230 is shown.
- the bobbin 311 may be formed based on at least one material of, for example, plastic or ceramic such as bakelite.
- a plastic molding method including at least one of transfer mold, injection mold, and blow mold may be performed.
- bobbin 311 may include an opening 312 .
- the bobbin 311 may include a tube portion 313 having an inner circumference corresponding to the area of the opening 312 .
- An area of the opening 312 formed in the tube portion 313 may correspond to an area of a cross section of a protruding portion of a core to be inserted into the opening 312 (eg, the cores 210 and 220 of FIGS. 2A and 2B ).
- a shape of the opening 312 formed in the tube portion 313 may correspond to a shape of one end of a protrusion of a core to be inserted into the opening 312 .
- the length of the tube part 313 may correspond to the length of the protruding part of the core to be inserted into the opening 312 .
- the bobbin 311 may include flange parts 314 and 315 extending from one end of the tube part 313 in a direction perpendicular to the tube part 313. .
- the flange portions 314 and 315 are formed on a flange portion of another inductor assembly distinct from the inductor assembly 230 and/or on one surface of the core in a state in which the inductor assembly 230 is inserted into the protruding portion of the core of the transformer. can be encountered
- an inductor 322 may be formed.
- the inductor 322 may be wound around the outer circumference of the tube unit 313 .
- the length of the tube part 313 may be related to the number of turns of the inductor 322 wound around the outer circumference of the tube part 313 .
- stages of inductor 322 may extend over at least one of flange portions 314 and 315 of bobbin 311 .
- inductor assembly 230 may include pins 324 coupled to inductor 322 extending over at least one of flanged portions 314 and 315 .
- Pins 232 - 1 , 234 - 1 , 236 - 1 , and 238 - 1 of FIG. 2 may correspond to an example of pins 324 .
- the number of pins 324 may correspond to the number of ends of the inductor 322 .
- the number of pins 324 may exceed the number of ends of the inductor 322 in order to branch and receive the current associated with the inductor.
- the number of pins 324 corresponding to the inductor 322 may be four as two pins are connected to both ends of the inductor 322, respectively.
- the inductor assembly 230 may include a side cover 332 .
- the side cover 332 may include an insulating material so that at least a portion of the inductor 322 covered by the side cover 332 is electrically insulated from the outside of the side cover 332 .
- the conductive material of the inductor assembly 230 that is distinguished from the pins 324 eg, a lead forming the inductor 322 is electrically conductive from the outside of the inductor assembly 230. can be insulated.
- the molding performed to cover at least a portion of the inductor 322 may be performed to retain the opening 312 formed by the tube portion 313 of the inductor assembly 230 .
- a protrusion of the core of the transformer may be inserted into the opening 312 of the molded inductor assembly 230 .
- FIGS. 4A to 4B the structure of the transformer corresponding to the inductor assembly 230 will be described in more detail with reference to FIGS. 4A to 4B.
- FIGS. 4A to 4B are perspective views for explaining cores 210 and 220 of a transformer included in a display device according to an exemplary embodiment.
- the display devices of FIGS. 4A to 4B may correspond to the display device 101 of FIG. 1 .
- the transformers of FIGS. 4A and 4B may correspond to an example of the transformer of FIG. 1 .
- the transformer of FIGS. 4A to 4B may correspond to the transformer 118-1 of FIGS. 2A to 2B.
- the core 210 may include extensions 410 extending in the lengthwise and widthwise directions.
- the core 210 protrudes from different regions on the first face 412 of the extension 410, and the direction the first face 412 faces (eg, the normal to the first face 412). It may include protruding parts 420, 430, and 440 protruding along the direction 414 of .
- protrusions 420, 430 and 440 may be spaced parallel to each other.
- the protruding part 420 included in the core 210 may protrude from an area of the first surface 412 spaced apart from an edge of the first surface 412 of the extension part 410 .
- the protrusion 420 may be referred to as a middle leg of the transformer and/or core 210 .
- the protrusion 420 may be inserted into an opening (eg, the opening 312 of FIG. 3 ) of one or more inductor assemblies (eg, at least one of the inductor assemblies 230 of FIG. 2A ) included in the transformer. As the protrusion 420 is inserted into the opening, the opening may be filled by the protrusion 420 .
- the protruding portion 420 As the protruding portion 420 is inserted into the opening, at least a portion of the inner circumference of the tube portion (eg, the tube portion 313 of FIG. 2A ) of the inductor assembly having the opening may come into contact with the protruding portion 420 .
- the area of the cross section of the protrusion 420 perpendicular to the direction 414 may vary depending on the distance between the cross section and the first surface 412 .
- a cross-section perpendicular to direction 414 may have the first area.
- a cross-section perpendicular to direction 414 may have a second area.
- a section perpendicular to direction 414 of portion 424 may be wider than a cross section perpendicular to direction 414 of portion 426 .
- the first area may be smaller than the second area.
- a transformer according to one embodiment may include inductor assemblies having openings fitted into each of portions 424 and 426 .
- an area of the opening of the inductor assembly 234 corresponding to the portion 424 of FIG. 4 may correspond to the second area.
- the area of the opening of the inductor assembly 232 of FIG. 2A corresponding to portion 426 may correspond to the first area.
- the protrusion 420 of the core 210 may be inserted into the opening of the inductor assembly 234 of FIG. 2A and then inserted into the opening of the inductor assembly 232 of FIG. 2A.
- the protrusions 430 and 440 included in the core 210 are part of an edge of the first surface 412 of the extension 410 (eg, in the longitudinal direction of the first surface 412). part of the vertical edge).
- the protrusions 430 and 440 may be spaced apart by a length of the length and width of the first surface 412 .
- Protrusions 430 and 440 may be referred to as outer legs of the transformer and/or core 210 . It is distinguished from a portion where the inductor is wound, and may correspond to a portion where the cores 210 and 220 come into contact with each other.
- a first length of protrusions 430 and 440 protruding from first surface 412 may exceed a second length of protrusion 420 protruding from first surface 412 .
- An air gap may be formed in the transformer based on the difference between the first length and the second length.
- the core 220 may include an extension 450 having a dimension corresponding to the extension 410 of FIG. 4A.
- the length and width of the extension 450 may correspond to the length and width of the extension 410 of FIG. 4A .
- the core 220 protrudes from the first face 452 of the extension 450 in a direction toward which the first face 452 faces (eg, a direction 454 normal to the first face 452 ). )) may include one or more protrusions 460, 470, and 480 protruding along.
- the first surface 452 of the extension portion 450 from which the protrusions 460, 470, and 480 protrude may be dropped while facing the first surface 412 of FIG. 4A within the transformer.
- the first surface 452 and the first surface 412 of FIG. 4A face and fall apart, one end of each of the protrusions 460, 470, and 480 and the protrusions 420, 430, and 440 of FIG. 4A, respectively One end of can face in the transformer.
- the protruding portion 460 may protrude from the first surface 452 of the core 220 and be spaced apart from an edge of the first surface 452 .
- protrusion 460 may be referred to as a midfoot of transformer and/or core 220 .
- Protrusion 460 may be inserted into an opening of one or more inductor assemblies included in the transformer.
- An area of a cross section of the protrusion 460 perpendicular to the direction 454 may correspond to an area of an opening of the inductor assembly into which the protrusion 460 is to be inserted.
- the area of the cross section of the protrusion 460 perpendicular to the direction 454 may remain independent of the distance between the first face 452 and the cross section.
- the area of the cross section of the protrusion 460 perpendicular to the direction 454 may correspond to the first area of the cross section of the portion 426 of the protrusion 420 in FIG. 4A .
- a transformer according to one embodiment may include one or more inductor assemblies having an opening to fit over protrusion 460 .
- the area of the opening of the inductor assembly 232 corresponding to the core 220 is the area of the cross section of the protrusion 460 and the cross section of the portion 426 of the protrusion 420 of FIG. 4A. It can correspond to 1 area.
- each of the different portions of the inner circumference of the inductor assembly 232 of FIG. 2A is at the protrusion 460 of the core 220 and the portion 426 of the protrusion 420 of the core 210 of FIG. 4A. can be encountered
- the protrusions 470 and 480 included in the core 220 are part of an edge of the first surface 452 of the extension 450 (eg, in the longitudinal direction of the first surface 452). part of the vertical edge).
- the protrusions 470 and 480 may be referred to as outer ends of the transformer and/or the core 220 .
- a first length of the protrusions 470 and 480 protruding from the first surface 452 may exceed a second length of protrusion of the protrusion 460 from the first surface 452 .
- protrusions 420 and 460 corresponding to the mid foot may be spaced apart within the transformer. In this case, a gap may be formed between the protrusions 420 and 460 corresponding to the midfoot.
- the first coupling degree of can be distinguished from the second coupling between the first inductor assembly and the third inductor assembly.
- Each of the first coupling degree and the second coupling degree, which are distinguished from each other, may be related to different circuits of the display device connected to the transformer. For example, each of the first coupling degree and the second coupling degree may be used to provide inductance required by each of different circuits.
- FIG. 5 is a cross-sectional view of the transformer 118-1 taken along line A-A' in FIG. 2B.
- the display device of FIG. 5 may correspond to the display device 101 of FIG. 1 .
- the transformer 118-1 of FIG. 5 may correspond to the transformer 118-1 of FIGS. 2A and 2B.
- the cores 210 and 220 are in contact with each other on a plane perpendicular to the surface. (210, 220) can achieve asymmetry.
- the area of the cross section of the portion 424 corresponding to the specific inductor assembly 234 among the inductor assemblies 232, 234, 236, and 238 is 234 , 236 , 238 ) may be different from the area of the cross section of the portion 426 corresponding to other inductor assemblies (eg, inductor assembly 232 ).
- a protruding portion 424 of the core 210 may be inserted into an opening of the inductor assembly 234 .
- the inductor of inductor assembly 234 may be wound around portion 424 .
- Portion 426 of the protrusion of core 210 may be inserted into an opening in inductor assembly 232 .
- the inductor of inductor assembly 232 may be wound around portion 426 .
- An inductor assembly 232 in which a portion 426 of the core 210 is inserted into the opening may be inserted into the opening, which is formed in the inductor assemblies 236 and 238 and corresponds to an outer circumference of the inductor assembly 232.
- Portion 460 of core 220 is inserted into the opening of inductor assemblies 236, 238, and portion 426 of core 210 is inserted into the opening of inductor assembly 232, in a first direction. , It may be inserted along a second direction distinct from the first direction. Referring to FIG.
- the inductor of the inductor assembly 238 close to the core 210 among the inductor assemblies 236 and 238 is attached to the outer circumference of the inductor assembly 232 and/or to a portion 426 of the core 210.
- an inductor of the inductor assembly 236 close to the core 220 may be wound around the outer circumference of the inductor assembly 232 and/or the protrusion 460 of the core 220 .
- flange parts and/or tube parts included in each of the inductor assemblies 232 , 234 , 236 , and 238 may form inductor assemblies 232 , 234 , 236 , 238) may have a shape and/or size for alignment.
- the length of the tube portion of the inductor assembly 234 may correspond to the length of the protruding portion 424 of the core 210 of the transformer 118-1.
- the flange portion of the inductor assembly 234 may cover one surface between the portion 424 and the protrusion 430 in the extension portion 410 of the core 210 .
- the length of the tube portion of the inductor assembly 232 corresponds to the outer leg, and the portion of the core 210 into which the inductor assembly 232 is inserted is the sum of the lengths of the protruding portions 430 and 470 in contact with each other ( 426) may correspond to a value obtained by subtracting the length of the distinct portion 424.
- the sum of the lengths of the tube parts of the inductor assemblies 236 and 238 may correspond to the length of the tube part of the inductor assembly 232 .
- the inductor assembly 236 and the flange portion of the inductor assembly 232 may have a shape filling a cross section of a space between the portion 426 and the protrusion 430 of the core 210 .
- the flange portion of the inductor assembly 232 is perpendicular to the tube portion of the inductor assembly 232 at portion 424 in a state in which the tube portion and portion 426 of the inductor assembly 232 are in contact with each other, and It may be sized to contact all of the flange portion of the inductor assembly 234 .
- the protrusion of the core 210 in order to form a gap 510 between the protrusion of the core 210 corresponding to the midfoot and the protrusion 460 of the core 220, the protrusion of the core 210 One end of the portion 426 of the core 220 and one end of the protrusion 460 of the core 220 may face each other and fall apart.
- the air gap 510 may have a specified thickness related to inductive coupling between the inductor assemblies 232 , 234 , 236 , and 238 .
- the cross section of the void 510 may have a shape corresponding to one end of the protruding portion 426 of the core 210 .
- the thickness of the void 510 is the length of the outer legs of the cores 210 and 220 in contact with each other, for example, in a state in which the protrusions 430 and 470 and the protrusions 440 and 480 are in contact with each other. (eg, the sum of the lengths of the protrusions 430 and 470) and the sum of the lengths of the midfoots (eg, the sum of the lengths of the protrusions 424 and 426 and the protrusion 460). .
- the inductor included in the inductor assembly 232 may radiate magnetic flux.
- the radiated magnetic flux may cause current to flow in inductors included in each of the inductor assemblies 234 , 236 , and 238 included in the transformer 118 - 1 .
- the inductors included in each of the inductor assemblies 234, 236, and 238 may output a current based on the AC current.
- a current output from each of the inductors included in each of the inductor assemblies 234 , 236 , and 238 may change based on inductive coupling between the corresponding inductor and the inductor of the inductor assembly 232 .
- the current output from the inductor of the inductor assembly 234 may be generated based on a leakage inductance and/or a magnetization inductance formed between the inductor of the inductor assembly 234 and the inductor of the inductor assembly 232.
- the current output from the inductor of inductor assembly 236 may be generated based on the leakage inductance and/or the magnetizing inductance between the inductor of inductor assembly 236 and the inductor of inductor assembly 232.
- the coupling coefficient between the inductors included in each of the inductor assemblies 232, 234, 236, and 238 is the difference between the inductor assemblies 232, 234, 236, and 238 in the transformer 118-1. Based on location, it can be determined.
- the coupling coefficient may be inversely proportional to the leakage inductance.
- all of the inductor assemblies 232, 236, 238 may have a portion 426 of the protrusion of the core 210 and a portion 460 of the core 220 having a cross-sectional area corresponding to the cross-sectional area of the portion 426. ) and disposed in contact with each other, the coupling coefficient between the inductor assemblies 232, 236, and 238 may be relatively high.
- the coupling coefficient between inductor assemblies 236 and 238 may be substantially the same because inductor assemblies 236 and 238 are symmetrically disposed with respect to inductor assembly 232 . Since the coupling coefficient between inductor assemblies 236 and 238 is substantially equal, the leakage inductance between inductor assemblies 236 and 238 may be substantially equal.
- the inductor assembly 234 may include a portion 426 of a protrusion of the core 210 around which the other inductor assemblies 232, 236, and 238 are wound in the transformer 118-1 and a portion 426 of the core 220. Since it is wound around the portion 424 of the protrusion of the core 210 having a different area than the protrusion 460 and is disposed relatively far from the inductor assembly 232 compared to the inductor assemblies 236 and 238, the inductor assemblies 236 , 238) may have a small coupling coefficient. Since the inductor assembly 234 has a relatively small coupling coefficient, other circuits connected to the transformer 118-1 can obtain a relatively large leakage inductance using the inductor assembly 234.
- the leakage inductance obtained based on inductor assembly 234 may be related to a difference in shape (and/or cross-sectional area) of portion 424 and portion 426 of the protrusion of core 210. .
- leakage inductance corresponding to the inductor assembly 234 may increase.
- the leakage inductance corresponding to inductor assembly 234 may be increased.
- FIGS. 6A to 6B are diagrams illustrating another example of a transformer 118-2 included in a display device according to an exemplary embodiment.
- the display devices of FIGS. 6A to 6B may correspond to the display device 101 of FIG. 1 .
- the transformer 118-2 of FIGS. 6A to 6B may correspond to an example of the transformer 118 of FIG. 1 .
- FIG. 6A is a cross-sectional view of a transformer 118-2 included in a display device according to an exemplary embodiment.
- FIG. 6A includes a midfoot (e.g., protrusion 460 of core 220 and protrusion 460 of core 220, including portions 424 and 426) of transformer 118-2, and an outfoot. It is a cross-sectional view taken along an axis connecting between (eg, protrusions 430, 440, 470, and 480).
- a transformer 118-2 according to an embodiment includes cores 210 and 220 and inductor assemblies 232, 236, 238 and 610 disposed between the cores 210 and 220.
- inductor assemblies 232 , 236 , and 238 and the cores 210 and 220 can include Hereinafter, among descriptions of the inductor assemblies 232 , 236 , and 238 and the cores 210 and 220 , descriptions overlapping those of FIGS. 2A to 2B , 3 , 4A to 4B , and 5 will be omitted.
- the transformer 118-2 may use the inductor assembly 610 to obtain the number of inductor turns required to drive other circuits connected to the inductor assembly 610.
- the protruding portion 424 of the core 210 may be inserted into an opening included in the inductor assembly 610 along the first direction. With portion 424 inserted into the opening of inductor assembly 610 along the first direction, inductor assembly 232 is inserted into the opening included in inductor assembly 610 along a second direction distinct from the first direction.
- the first flange portion in contact with the core 210 and the second flange portion in contact with the inductor assembly 238 may have independent shapes and/or sizes.
- the first flange portion may have a shape filling a gap between the portion 424 and the protrusion 430 in the core 210 .
- the second flange portion may have a shape corresponding to the flange portion of the inductor assembly 238 .
- FIG. 6B is a diagram for explaining the structure of the inductor assembly 610 of FIG. 6A.
- the length of the tube portion 650 of the inductor assembly 610 may have a length to secure the number of turns of the wire required for the inductor assembly 610 .
- the inductor assembly 610 is the inductor assembly 610 ) may have an opening capable of accommodating an outer circumference of another inductor assembly (eg, the inductor assembly 232 of FIG. 6A ) in contact with the inductor assembly.
- the opening of the first portion 652 of the tube portion 650 may correspond to the protruding portion 424 of the core 210 as the inductor assembly 610 is disposed within the transformer 118-2.
- the cross-sectional area 662 of the opening in the first portion 652 may correspond to the cross-sectional area of the protruding portion 424 of the core 210 .
- the flange portion 642 adjacent to the first portion 652 is formed in the core 210 because the opening of the first portion 652 corresponds to the portion 424 of the protrusion of the core 210.
- the protruding part may have a shape filling the first surface of the extending part 410 .
- the opening of the second portion 654 of the tube portion 650 in the inductor assembly 610 is formed as the inductor assembly 610 is disposed in the transformer 118-2, It may correspond to the outer circumference of another inductor assembly (eg, the inductor assembly 232) distinguished from the protrusion of the core 210.
- the cross-sectional area 664 of the opening in the second portion 654 may correspond to the cross-sectional area of the outer circumference of the other inductor assembly.
- the flange portion 620 adjacent to the second part 654 has an opening of the second part 654 corresponding to the other inductor assembly, so that the outer circumference of the other inductor assembly and the core 210 are formed. It may have a shape that fills the outer leg (eg, the protrusions 430 and 440 of the core 210).
- An inductor assembly 610 is distinguished from a first portion 652 corresponding to the portion 424 of the protrusion of the core 210, and a second portion 654 around which at least a portion of the inductor 630 is wound. ), the number of turns of the inductor 630 included in the inductor assembly 610 may be increased.
- inductor assembly 610 is a protrusion (e.g., portion 426 and protrusion 460 of core 220) around which other inductor assemblies 232, 236, and 238 are wound in transformer 118-2. )), a relatively large leakage inductance may be provided from the inductor assembly 610 .
- the inductor assembly 610 further includes the second portion 654 , an increased leakage inductance may be provided from the inductor assembly 610 based on the increased number of turns by the second portion 654 .
- FIGS. 7A to 7B an example of a transformer having a structure different from that of the transformer 118-2 of FIGS. 6A to 6B will be described in more detail with reference to FIGS. 7A to 7B.
- FIGS. 7A to 7B are diagrams illustrating an example of a transformer 118-3 included in a display device according to an exemplary embodiment.
- the display devices of FIGS. 7A to 7B may correspond to the display device 101 of FIG. 1 .
- the transformer 118-3 of FIGS. 7A to 7B may correspond to an example of the transformer 118 of FIG. 1 .
- FIG. 7A is an exploded perspective view of a transformer 118-3 included in a display device according to an exemplary embodiment.
- the transformer 118-3 may include cores 710 and 720 and inductor assemblies 230 disposed between the cores 710 and 720.
- inductor assemblies 232 , 234 , 236 , and 238 included in transformer 118 - 3 are shown.
- descriptions overlapping those of FIGS. 2A to 2B and FIG. 3 may not be repeated.
- the cores 710 and 720 of the transformer 118-3 may include protrusions having different cross-sectional areas.
- the protrusions may be inserted into openings of different inductor assemblies included in the transformer 118-3.
- the core 710 may include a first surface and a protrusion protruding from the first surface along a direction in which the first surface faces, and having a cross section perpendicular to the direction in which the first surface faces and having a first area. .
- the inductor assembly 234 having an opening into which the protrusion of the core 710 is inserted includes a bobbin including an opening corresponding to the first area so as to contact the outer circumference of the protrusion of the core 710 and an inductor wound around the bobbin.
- the core 720 has a second surface facing the first surface of the core 710 and protrudes from the second surface along a direction in which the second surface faces, and a cross section perpendicular to the direction in which the second surface faces is the first surface.
- a protrusion having a second area distinct from the first area may be included.
- the inductor assembly 232 having an opening into which the protrusion of the core 720 is inserted includes a bobbin including an opening corresponding to the second area so as to contact the outer circumference of the protrusion of the core 720 and an inductor wound around the bobbin.
- a bobbin including an opening corresponding to the second area so as to contact the outer circumference of the protrusion of the core 720 and an inductor wound around the bobbin.
- the inductor assemblies 230 may be asymmetrically disposed within the transformer 118-3.
- the inductor assemblies 236 and 238 may include openings corresponding to outer circumferences of the inductor assembly 232, and the inductor assembly 232 may be inserted into the openings of the inductor assemblies 236 and 238.
- the inductor assemblies 232 , 236 , and 238 may be wound on the protrusion of the core 720
- the inductor assembly 234 may be wound on the protrusion of the core 710 .
- the protrusions corresponding to the midfoot have different shapes and/or cross-sectional areas, the protrusions (eg, , a protrusion of the core 710), a relatively high leakage inductance may occur in the inductor assembly 234.
- FIG. 7B is a cross-sectional view of a transformer 118-3 included in a display device according to an exemplary embodiment.
- FIG. 7B includes projections 714 and 724 of cores 710 and 720 around which inductors of inductor assemblies 232, 234, 236 and 238 are wound, and A cross-sectional view taken along an axis connecting between the protrusions 716, 718, 726, and 728.
- each of the cores 710 and 720 includes extensions 712 and 722, and protrusions 714 and 716 protruding from different regions in each of the extensions 712 and 722. 718, 724, 726, 728).
- descriptions overlapping those of FIGS. 4A to 4B and FIG. 5 may not be repeated.
- protrusions 714 and 724 to be inserted into at least one opening of the inductor assemblies 230 in each of the cores 710 and 720 may have different cross-sectional areas. Referring to FIG.
- the protrusion 714 of the core 710 inserted into the opening of the inductor assembly 234 may have a shape filling the opening of the inductor assembly 234 .
- the volume of the protrusion 714 of the core 710 may be less than or equal to the volume of the opening formed in the inductor assembly 234 .
- the protruding portion 724 of the core 720 inserted into the opening of the inductor assembly 232 may have a shape filling the opening of the inductor assembly 232 .
- the volume of the protrusion 724 of the core 720 may be less than or equal to the volume of the opening formed in the inductor assembly 232 .
- a gap 730 may form in the transformer 118-3.
- the length of the protruding portion 724 of the core 720 may be less than the length of the tube portion of the inductor assembly 232 in which the opening into which the protruding portion 724 is inserted is formed.
- An example in which the air gap 730 is formed adjacent to the inductor assembly 232 among the inductor assemblies 232 and 234 is shown, but the embodiment is not limited thereto.
- 232 and 234 may be formed adjacent to the inductor assembly 234.
- the transformer 118-3 included in the display device includes cores having different shapes ( 710, 720) may be included.
- cores having different shapes 710, 720
- protrusions 714 and 724 inserted into the openings of the inductor assemblies 232 , 234 , 236 and 238 may have different shapes.
- the protrusions 714 and 724 are different from each other. Leakage inductance between the arranged inductors may be increased.
- an equivalent circuit of the transformer 118-3 including cores 710 and 720 having different shapes will be described.
- FIG. 8 is a diagram illustrating an equivalent circuit of a transformer 118 included in a display device according to an exemplary embodiment.
- the display device of FIG. 8 may correspond to the display device 101 of FIG. 1 .
- the transformer 118 of FIG. 8 may correspond to the transformer 118 of FIG. 1 .
- the equivalent circuit of FIG. 8 is equivalent to the transformer 118-1 of FIGS. 2A to 2B and 5, the transformer 118-2 of FIG. 6A, and the transformer 118-3 of FIGS. 7A to 7B. can respond
- stages 801, 802, 803, 804, 805, 806, An equivalent circuit between 807 and 808) is shown.
- the stages 801 and 802 may correspond to both ends of the inductor included in the inductor assembly 232 of FIGS. 2A, 5, 6A, and 7A to 7B.
- a leakage inductor 810 having a leakage inductance L lkg1 corresponding to the inductor of inductor assembly 232 and a magnetizing inductance L m corresponding to the inductor of inductor assembly 232 are A magnetizing inductor 850 may be disposed.
- stages 803 and 804 may correspond to both ends of the inductor included in the inductor assembly 236 of FIGS. 2A, 5, 6A, and 7A to 7B.
- a leakage inductor 820 having a leakage inductance L lkg2 corresponding to that of the inductor of the inductor assembly 236 may be disposed.
- stages 805 and 806 may correspond to both ends of an inductor included in inductor assembly 238 of FIGS. 2A, 5, 6A, and 7A to 7B.
- a leakage inductor 830 having a leakage inductance L lkg3 corresponding to that of the inductor of inductor assembly 238 may be disposed.
- the stages 807 and 808 may correspond to both ends of the inductor included in the inductor assembly 234 of FIGS. 2A, 5, 6A, and 7A to 7B.
- a leakage inductor 840 having a leakage inductance L lkg4 corresponding to the inductor of the inductor assembly 234 and a leakage inductor 845 having a leakage inductance L add may be placed.
- Inductors of a plurality of inductor assemblies may be inductively coupled based on subtractive polarity.
- the first cross-sectional area of the protruding portion of the core around which the first inductor assembly is wound among the plurality of inductor assemblies is different from that of the first inductor assembly. It may be different from the second cross-sectional area of the protrusion of the wound core. Based on the difference between the first cross-sectional area and the second cross-sectional area, a relatively large leakage inductance may occur in the first inductor assembly.
- inductor assembly 234 corresponds to the first inductor assembly, and inductor assemblies 232, 236, and 238 that are distinct from inductor assembly 234.
- leakage inductors 840 and 845 disposed between stages 807 and 808 corresponding to the inductors of the inductor assembly 234 of FIGS. 2A, 5, 6A, and 7A to 7B, A relatively large leakage inductance generated in the first inductor assembly may be indicated.
- the leakage inductance L add of the leakage inductor 845 may be related to a difference between the first cross-sectional area and the second cross-sectional area.
- leakage inductance L lkg4 of leakage inductor 840 may be related to a positional relationship between inductor assembly 234 of the above examples and another inductor assembly (inductor assembly 232 in the above examples).
- the leakage inductances between the leakage inductors 820, 830, 840, and 845 may have a relationship of L lkg2 ⁇ L lkg3 ⁇ L lkg4 + L add .
- the leakage inductors 840 and 845 having a relatively large leakage inductance.
- the leakage inductors 840 and 845 may be connected to another circuit distinct from the transformer 118 through terminals 807 and 808 to provide inductance to the other circuit.
- the other circuit can be implemented based on a relatively small number of inductors.
- FIGS. 9A to 9B are diagrams for explaining an example of a transformer 118-4 included in a display device according to an exemplary embodiment.
- the display devices of FIGS. 9A and 9B may correspond to the display device 101 of FIG. 1 .
- the transformer 118-4 of FIGS. 9A to 9B may correspond to an example of the transformer 118 of FIG. 1 .
- FIGS. 9A is a cross-sectional view of a transformer 118-4 included in another display device according to an embodiment.
- the transformer 118-4 may include cores 210 and 220 and inductor assemblies 232, 234 and 910.
- the cores 210 and 220 may correspond to the cores 210 and 220 of FIGS. 2A to 2B and 4A to 4B.
- the inductor assemblies 232 and 234 may correspond to the inductor assemblies 232 and 234 of FIGS. 2A and 2B .
- descriptions overlapping those of FIGS. 2A to 2B, 3, 4A to 4B, and 5 will be omitted.
- the transformer 118-4 may include an inductor assembly 910 including a tube portion having an opening corresponding to an outer circumference of the inductor assembly 232.
- inductor assembly 232 may be inserted into an opening in inductor assembly 910 .
- the length of the tube part may correspond to the length of the tube part of the inductor assembly 232 .
- the inductor assembly 910 may further include one or more flange parts vertically extending from the tube part. Referring to FIG. 9A , the size of the flange parts is such that the inductor assembly 910 is fixed by the protrusions 470 and 480 of the core 220 and/or the inductor assembly 232. It may correspond to the distance between the outer circumference and the protrusions 470 and 480 of the core 220 .
- stages 901 , 902 , 903 , 904 , 905 , and 906 connected to the inductors included in the inductor assemblies 232 , 234 , and 910 included in the transformer 118-4 of FIG. 9A
- stages 901 and 902 may correspond to both ends of an inductor included in the inductor assembly 232 of FIG. 9A.
- stages 901 and 902 a leakage inductor 910 having a leakage inductance L lkg1 associated with the inductor of inductor assembly 232 and a magnetization associated with the inductor of inductor assembly 232 magnetization having inductance L m
- An inductor 940 may be disposed.
- stages 903 and 904 may correspond to both ends of an inductor included in the inductor assembly 910 of FIG. 9A .
- stages 903 and 904 may be disposed a leakage inductor 920 having a leakage inductance L lkg2 associated with the inductor of inductor assembly 910 .
- stages 905 and 906 may correspond to both ends of an inductor included in inductor assembly 234 of FIG. 9A .
- a leakage inductor 930 having a leakage inductance L lkg3 associated with the inductor of inductor assembly 234 and a leakage inductor 935 having a leakage inductance L add may be placed.
- inductors corresponding to each of the inductor assemblies may be inductively coupled to each other based on polarity.
- the inductor of inductor assembly 234 corresponding to leakage inductors 930 and 935 disposed between stages 905 and 906 is different from other inductor assemblies in transformer 118-4.
- Another portion of the core eg, portion 426 of core 210 and/or portion 460 of core 220 having a different shape than the portion of the core around which the inductors of (232, 910) are wound. may be wrapped around portion 424 of core 210 .
- the leakage inductors 930 and 935 may have a different inductance than the leakage inductor 920.
- the leakage inductance L add of the leakage inductor 935 may be based at least on the shape of the other portion of the core around which the inductor assembly 234 is wound.
- leakage inductance L lkg4 of leakage inductor 930 may be based at least on a positional relationship between inductor assembly 234 and other inductor assemblies 232 and 910 .
- the leakage inductances of each of the leakage inductors 920 , 930 , and 935 may have a relationship of L lkg2 ⁇ L lkg3 + L add .
- FIGS. 10, 11, and 12a to 12d an embodiment of a display device including a transformer will be described in more detail with reference to FIGS. 10, 11, and 12a to 12d.
- FIG. 10 is a block diagram and an equivalent circuit diagram for explaining an operation of a transformer 118 included in a display device 101 according to an exemplary embodiment.
- the display device 101 of FIG. 10 may correspond to the display device 101 of FIG. 1 .
- the power source 120, the rectifier 112, the power factor corrector 114 and the transformer 118 of FIG. 10 are respectively the power source 120, the rectifier 112, the power factor corrector 114 and the power factor corrector 114 of FIG. It may correspond to the transformer 118.
- the transformer 118 of FIG. 10 includes the transformer 118-1 of FIGS. 2A to 2B and 5, the transformer 118-2 of FIG. 6A, and the transformer 118-3 of FIGS. 7A to 7B. can do.
- an equivalent circuit of the transformer 118 may correspond to the equivalent circuit of FIG. 8 .
- the AC signal received from the power source 120 may be rectified by the rectifier 112 included in the display device 101 .
- the power factor corrector 114 receiving the rectified AC signal may transmit a current to the capacitor 1020 included in the display device 101 based at least on the phase of the voltage of the rectified AC signal.
- Capacitor 1020 may be coupled to power factor corrector 114 via nodes 1022 and 1024 .
- the display device 101 generates an AC signal having a period and/or phase independent of that of the AC signal of the power source 120 from power charged in a capacitor 1020.
- An inverter 1010 may be included.
- the inverter 1010 may include, for example, a half bridge inverter and/or a full bridge inverter. Examples of an inverter 1010 are shown in FIGS. 11 and/or 12A-12D.
- the AC signal generated by the inverter 1010 may be input to the transformer 118 through terminals 801 and 802 .
- the ratio of the number of turns N1, N2, N3, and N4 of each of the inductors included in the plurality of inductor assemblies is at least based on the ratio.
- Alternating current signals having a voltage of the terminals 803 , 804 , 805 , 806 , 807 , and 808 may be output.
- the leakage inductances (L lkg1 , L lkg2 , L lkg3 , L lkg4 and L add ) and magnetization inductance (L m ) may be formed.
- Voltages of AC signals output through the terminals 803, 804, 805, 806, 807, and 808 may be determined by the leakage inductance and/or the magnetization inductance.
- a power circuit eg, power circuit 110 of FIG. 1
- a transformer 118 the voltage of the AC signal output through the terminals 803 and 804, the voltage of the AC signal output through the terminals 805 and 806, and the voltage of the AC signal output through the terminals 807 and 808 are mutually related. can be independent
- the terminals 803, 804, 805, 806, 807, and 808 are connected to different circuits of the display device 101, AC signals having different voltages can be input to the different circuits.
- the power circuit of the display device 101 may include an isolated converter based on the transformer 118 .
- a rectifier 1030 connected to stages 803, 804, 805, and 806 may rectify AC signals output from stages 803, 804, 805, and 806.
- the AC signal rectified by the rectifier 1030 may be used to charge the capacitor 1040 connected to the terminals 1032 and 1034 of the rectifier 1030 .
- Power charged in the capacitor 1040 may be used to drive another circuit (eg, the second circuit 140 of FIG. 1 ) connected through the terminals 1032 and 1034 .
- leakage inductances formed within transformer 118 leakage inductances L lkg2 and L lkg3 may be provided to rectifier 1030 and/or other circuitry coupled to stages 1032 and 1034 .
- a rectifier 1050 connected to stages 807 and 808 may rectify AC signals output from stages 807 and 808 .
- the AC signal rectified by the rectifier 1050 may be used to charge the capacitor 1060 connected to the terminals 1052 and 1054 of the rectifier 1050 .
- Power charged in the capacitor 1060 may be used to drive other circuits (eg, the first circuit 130 including the LED driving circuit of FIG. 1 ) connected through the terminals 1052 and 1054 .
- leakage inductances formed within transformer 118 leakage inductances L lkg4 and L add may be provided to rectifier 1050 and/or other circuitry coupled to stages 1052 and 1054 .
- the leakage inductance L lkg4 and/or leakage inductance L add may be used to obtain a voltage in excess of the voltage applied to stages 807 and 808 .
- an inverter 1010 connected to stages 801, 802, 803, 804, 805, 806, 807, and 808 of the transformer 118 and a rectifier ( An example of 1030 and 1050) is described.
- FIG. 11 is an exemplary circuit diagram for explaining an operation of a transformer 118 included in a display device 101 according to an exemplary embodiment.
- the display device 101 of FIG. 11 may correspond to the display device 101 of FIG. 1 .
- the circuit diagram of FIG. 11 may correspond to an example of the display device 101 of FIG. 10 .
- an inverter 1010 of a display device 101 may operate based on a half-bridge method. For example, as each of the pulse signals having a specified phase difference is input to the gates 1110 and 1120 of the two transistors included in the inverter 1010, an AC signal based on the voltage charged in the capacitor 1020. can be created. Referring to FIG. 11 , an AC signal generated by the inverter 1010 may be input to the transformer 118 . As the AC signal is input, the transformer 118 may output a plurality of AC signals having voltages based on the input AC signal and changed by inductor assemblies included in the transformer 118 .
- a rectifier circuit based on a center-tap is shown as an example of a rectifier 1030 that rectifies an AC signal output from a transformer 118 .
- each of the inductor assemblies connected to the rectifier 1030 includes The number of turns (eg, N2 and N3) of the inductors may match each other.
- leakage inductances L lkg2 and L lkg3 of the transformer 118 associated with the rectifier 1030 may match each other.
- the capacitor 1040 connected to the stages 1032 and 1034 connected to the rectifier 1030 may supply power to another circuit connected after the stages 1032 and 1034 (eg, the second circuit 140 of FIG. 1). .
- a rectifier circuit based on a bridge diode is shown as an example of a rectifier 1050 distinct from the rectifier 1030 .
- Full-wave rectification based on a bridge diode may be performed by rectifier 1050.
- Capacitor 1060 connected to stages 1052 and 1054 of rectifier 1050 may be charged based on the current of leakage inductors 840 and 845 connected to rectifier 1050 .
- Power charged in the capacitor 1060 may be supplied to other circuits (eg, the first circuit 130 of FIG. 1 ) connected to the terminals 1052 and 1054 .
- the transformer 118 provides leakage inductors 840 and 845 having increased leakage inductances L lkg4 and/or L add , the increased leakage inductances L lkg4 and/or L add A voltage based at least on L add ) may be input to capacitor 1060 . In this case, a voltage necessary for the other circuit can be generated without adding an inductor for increasing the voltage.
- FIGS. 12A to 12D are exemplary diagrams for explaining an operation of a transformer included in a display device according to an exemplary embodiment.
- the display device 101 of FIGS. 12A to 12D may correspond to the display device 101 of FIG. 1 .
- the circuit diagrams of FIGS. 12A to 12D may correspond to an example of the display device 101 of FIG. 10 .
- an inverter 1010 of a display device 101 may operate based on a full bridge scheme. For example, in a state in which a plurality of transistors included in the inverter 1010 operate based on pulse signals having a specified phase difference, the inverter 1010 may generate an AC signal to be input to the transformer 118. . As the AC signal is input to the transformer 118, the transformer 118 may output a plurality of AC signals having voltages based on the input AC signal and changed by inductor assemblies included in the transformer 118. there is.
- a rectifier circuit based on a secondary side post regulator (SSPR) boost method is shown.
- SSPR secondary side post regulator
- the rectifier 1050 adjusts the voltage
- An AC signal having an increased voltage based on the leakage inductors 840 and 845 may be received without including an inductor for increasing the voltage.
- Rectifier 1050 may include a transistor 1226 and diodes 1222 and 1224 coupled through node 1228 . As the transistor 1226 operates based on the pulse signal, the AC signal applied to the terminals 807 and 808 may be transmitted to the capacitor 1060 based on the pulse signal. As the transformer 118 according to one embodiment provides leakage inductances L lkg4 and/or L add based on the leakage inductors 840 and 845, the rectifier 1050 provides an inductor for increasing the voltage. Without including, the capacitor 1060 may be charged based on the voltage increased by the leakage inductors 840 and 845. The charged capacitor 1060 may output a power signal having an increased voltage to other circuits connected through the terminals 1052 and 1054 .
- FIGS. 12C to 12D are diagrams illustrating examples in which the rectifier 1050 receiving the AC signal output from the transformer 118 operates based on the secondary resonance method.
- leakage inductors 840 and 845 and capacitors eg, capacitors 1232 and 1242
- the rectifier 1050 is an element distinct from an inductor and may include a capacitor 1232 and a diode 1234.
- the rectifier 1050 is an element distinct from an inductor, and may include a capacitor 1242 and diodes 1244 and 1246 connected through a node 1248.
- the rectifier 1050 of FIGS. 12C to 12D may include a capacitor among inductors and capacitors.
- the transformer 118 included in the display device 101 provides leakage inductances L lkg4 and/or L add based on the leakage inductors 840 and 845, the inductor is removed.
- the rectifier 1050 is based on the secondary resonance between the leakage inductors 840 and 845 and the capacitor (e.g., the capacitors 1232 and 1242 of FIGS. 12C to 12D), and the terminals 1052 and 1054 to which the capacitor 1060 is connected. ) can be increased.
- the inverter 1010 of FIG. 10 may selectively include the inverter 1010 of FIG. 11 or the inverter 1010 of FIG. 12A.
- the embodiment is not limited to the combination of the inverter 1010 and the rectifiers 1030 and 1050 of FIGS. 11 and 12A to 12D, and the transformer 118 according to an embodiment is a combination of FIGS. 11 and 12A to 12D. It may be connected with another combination of inverter 1010 and rectifiers 1030 and 1050 that are distinguished from each other.
- the rectifier 1050 of FIG. 10 may optionally include the rectifier 1050 of FIG. 11 or the different rectifiers 1050 of FIGS. 12A-12D.
- the full-bridge rectifier 1050 of FIG. 11 and the rectifier 1030 based on the center tap are connected to the transformer ( 118) can be connected.
- FIGS. 13A to 13B are views for explaining an example of a transformer 118-5 included in a display device according to an exemplary embodiment.
- the display devices of FIGS. 13A and 13B may correspond to the display device 101 of FIG. 1 .
- the transformer 118-5 of FIGS. 13A to 13B may correspond to an example of the transformer 118 of FIG. 1 .
- FIG. 13A is an exploded perspective view of a transformer 118-5 included in a display device according to an exemplary embodiment.
- the transformer 118-5 may include cores 210 and 220 and inductor assemblies 230 disposed between the cores 210 and 220.
- inductor assemblies 232 , 234 , 236 , and 238 included in transformer 118 - 5 are shown.
- descriptions overlapping those of FIGS. 2A to 2B and FIG. 3 will be omitted.
- the inductor assemblies 230 may include openings into which protrusions of the cores 210 and 220 are inserted. Each of the inductor assemblies 230 may include one or more pins corresponding to a portion of the wire wound on the bobbin of the inductor assembly that extends to the outside of the inductor assembly. Referring to FIG. 13A , pins 232-1, 234-1, 236-1, and 238-1 included in each of the inductor assemblies 232, 234, 236, and 238 are illustrated. In one embodiment of FIG. 13A , the direction in which the pins 232-1 and 234-1 included in the inductor assemblies 232 and 234 are directed is the +x direction.
- Directions in which the pins 232-1 and 234-1 are directed and directions in which the pins 236-1 and 238-1 are directed may be distinguished from each other.
- the direction in which the pins 236-1 and 238-1 included in the inductor assemblies 236 and 238 are directed may be in the -x direction.
- the relationship between the directions of the inductor assemblies 232, 234, 236, and 238 as indicated by the pins 232-1, 234-1, 236-1, and 238-1 is the inductor assembly 232 of FIG. , 234, 236, 238) can be distinguished from the relationship between the directions.
- FIG. 13B there is a relationship between the directions of the inductor assemblies 232, 234, 236, and 238 in FIG. An equivalent circuit of the transformer 118-5 based on the relationship is described.
- FIG. 13B an equivalent circuit of the transformer 118-5 of FIG. 13A is shown.
- stages 1311, 1312, 1313, 1314, 1315, and 1316 connected to the inductors included in the inductor assemblies 232, 234, 236, and 238 included in the transformer 118-5 of FIG. 13A , 1317, 1318) an equivalent circuit is shown.
- the stages 1311 and 1312 may correspond to both ends of the inductor included in the inductor assembly 232 of FIG. 13A.
- stages 1311 and 1312 In an equivalent circuit, between stages 1311 and 1312, a leakage inductor 1320 having a leakage inductance L lkg1 associated with the inductor of inductor assembly 232 and a magnetizing inductor having a magnetizing inductance L m associated with the inductor of inductor assembly 232 1325 may be placed.
- stages 1313 and 1314 may correspond to both ends of an inductor included in inductor assembly 236 of FIG. 13A .
- a leakage inductor 1330 may be disposed having a leakage inductance L lkg2 associated with the inductor of inductor assembly 236 .
- stages 1315 and 1316 may correspond to both ends of an inductor included in inductor assembly 238 of FIG. 13A.
- a leakage inductor 1340 may be disposed having a leakage inductance L lkg3 associated with the inductor of inductor assembly 238 .
- stages 1317 and 1318 may correspond to both ends of an inductor included in inductor assembly 234 of FIG. 13A.
- leakage inductor 1350 with leakage inductance L lkg4 and leakage inductor 1355 with leakage inductance L add of inductor assembly 234 may be placed.
- the transformer 118-5 of FIG. 13A may have an equivalent circuit different from that of the transformer 118-1 of FIG. 2A.
- FIG. 13B in a state in which the stages 1312 and 1317 are electrically connected by a conducting wire 1360, an inductor corresponding to the stages 1311 and 1312 (eg, the inductor of the inductor assembly 232 of FIG. 13A) and The inductor corresponding to stages 1313 and 1314 (eg, the inductor of inductor assembly 236 of FIG.
- inductor 13A is inductively coupled, and the inductor corresponding to stages 1315 and 1316 (eg, inductor assembly 238 of FIG. 13A) is inductively coupled. ) and inductors corresponding to stages 1317 and 1318 (eg, the inductor of inductor assembly 234 of FIG. 13A ) may be inductively coupled.
- the inductors may be inductively coupled based on polarity.
- the cross-sectional area of the first protruding portion of the core 210 on which the inductor assembly 234 is disposed is the second cross-sectional area of the protruding portion of the core 210 on which the inductor assemblies 232, 236, and 238 are disposed. Because the cross-sectional area of the portion and/or protrusion of core 220 is different, the leakage inductance associated with inductor assembly 234 may be greater than the leakage inductance associated with inductor assemblies 236 and 238 . In the equivalent circuit of transformer 118-5 of FIG. 13B, leakage inductor 1355 with leakage inductance L add is associated with inductor assembly 234 of FIG. It can exhibit a larger leakage inductance.
- the leakage inductance L add indicated by leakage inductor 1355 may be provided to other circuitry connected to stages 1311 and 1318 .
- the stages 801 and 802 of FIG. 10 may correspond to the stages 1311 and 1318 of FIG. 13A, respectively.
- the AC signal provided from the inverter 1010 of FIG. 10 is disposed between the stages 1311 and 1318 of the inductor assemblies of the transformer 118-5 (eg, the inductor assemblies 232 and 234 of FIG. 13A) can be output as Referring to the equivalent circuit of the transformer 118-5 of FIG.
- the first inductor corresponding to the stages 1311 and 1312 eg, the inductor of the inductor assembly 232 of FIG. 13A
- the stages 1313 and 1314 Due to inductive coupling between corresponding second inductors (e.g., inductors of inductor assembly 236 of FIG. 13A), an AC signal provided from inverter 1010 of FIG. signal can be generated.
- a third inductor corresponding to stages 1315 and 1316 eg, the inductor of inductor assembly 238 of FIG. 13A
- a fourth inductor corresponding to stages 1317 and 1318 eg, inductor assembly 234 of FIG. 13A
- the 10 may cause an AC signal to be generated in the third inductor by inductive coupling between the inductors.
- the leakage inductance L lkg4 and/or the leakage inductance L add indicated by the leakage inductor 1350 and/or the leakage inductor 1355, respectively, is provided to the inverter 1010, the number of inductors included in the inverter 1010 is reduced.
- the display device may use a transformer including a plurality of inductor assemblies to provide required power and leakage inductance to each of different circuits connected to the transformer.
- the protrusion of the core included in the transformer is inserted into a first portion having a first cross-sectional area inserted into the opening of the first inductor assembly among the inductor assemblies and into the opening of the second inductor assembly among the inductor assemblies, It may include a second portion having a second cross-sectional area different from the first cross-sectional area.
- a degree of coupling between the first inductor assembly and the second inductor assembly may be adjusted based on a difference between a first cross-sectional area of the first portion and a second cross-sectional area of the second portion within the protruding portion of the core. Based on the adjusted coupling degree, the transformer of the display device according to an embodiment may provide leakage inductance required by the other circuits to other circuits connected to the transformer.
- a display device includes a core including a first surface and a protruding portion protruding from the first surface along a direction in which the first surface faces. Transformers may be included.
- a cross section of a first portion of the protrusion perpendicular to the direction in which the first face faces has a first area
- a cross section of a second portion of the protrusion between the first portion and the first face. may have a second area larger than the first area.
- the transformer of the display device includes a first bobbin having a first opening corresponding to the first area and wound around the first bobbin so as to come into contact with an outer circumference of the first portion of the core.
- the transformer of the display device includes a second bobbin including a second opening corresponding to the second area and contacting an outer circumference of the second portion of the core and an inductor wound around the second bobbin. It may include a second inductor assembly that does.
- the transformer includes a second surface facing away from the first surface of the core and a protruding portion protruding from the second surface along a direction in which the second surface faces. It may further include other cores including. A cross section of the protrusion of the other core perpendicular to the direction in which the second surface faces may have the first area of the protrusion of the core. The protruding part of the other core may be inserted into the first opening of the first inductor assembly and come into contact with at least a portion of an inner circumference of the first inductor assembly.
- the first bobbin of the first inductor assembly has an inner circumference corresponding to the first area of the first opening, and the tube portion around which the inductor of the first inductor assembly is wound ( a tube portion) may be further included.
- An air gap may be formed in a space between one end of the protruding part of the core inserted into the inner circumference of the tube part and one end of the protruding part of the other core.
- the first bobbin of the first inductor assembly may further include a flange portion extending from one end of the tube portion along a direction perpendicular to the tube portion. there is.
- the flange portion may contact one surface of the second portion of the protrusion of the core, including a boundary line between the first portion of the protrusion of the core and the second portion of the protrusion of the core.
- the transformer further includes a third bobbin including a third opening corresponding to an outer circumference of the first inductor assembly and a third inductor assembly including an inductor wound around the third bobbin.
- the third inductor assembly may contact at least a portion of an outer circumference of the first inductor assembly.
- the transformer is configured to generate a magnetic flux of the inductor of the first inductor assembly generated by the first current based on the inductor of the first inductor assembly receiving the first current.
- a second current induced in the inductor of the second inductor assembly may be output.
- the transformer based on the inductor of the first inductor assembly receiving the first current, the inductor of the third inductor assembly based on the magnetic flux of the inductor of the first inductor assembly generated by the first current The induced third current may be output.
- the second current may be generated based on a first leakage inductance between an inductor of the first inductor assembly and an inductor of the second inductor assembly.
- the third current may be generated based on a second leakage inductance between the inductor of the first inductor assembly and the inductor of the third inductor assembly.
- the first leakage inductance may be greater than the second leakage inductance.
- the transformer further includes a fourth bobbin including a fourth opening corresponding to an outer circumference of the first inductor assembly and a fourth inductor assembly including an inductor wound around the fourth bobbin.
- the fourth inductor assembly may come into contact with another part within the transformer, which is different from a part contacted by the third inductor assembly at an outer circumference of the first inductor assembly.
- the transformer includes, based on the inductor of the first inductor assembly receiving the first current, magnetic flux generated in the inductor of the first inductor assembly generated by the first current. Based on the current, the second current induced in the inductor of the third inductor assembly and generated based on the first leakage inductance between the first inductor assembly and the third inductor assembly may be output.
- the transformer based on the inductor of the first inductor assembly receiving the first current, the fourth inductor assembly based on the magnetic flux generated in the inductor of the first inductor assembly generated by the first current
- a third current induced by an inductor, corresponding to the first leakage inductance, and generated based on a second leakage inductance between the first inductor assembly and the fourth inductor assembly may be output.
- the display device includes a display panel including one or more LEDs (Light Emitting Diodes), a first circuit for controlling brightness of the one or more LEDs included in the display panel, and the A second circuit distinct from the first circuit may be further included.
- the transformer may be electrically connected to the first circuit through an inductor of the second inductor assembly.
- the transformer may be electrically connected to the second circuit through an inductor of the third inductor assembly and an inductor of the fourth inductor assembly.
- the first circuit may include leakage between an inductor of the first inductor assembly provided through an inductor of the second inductor assembly connected to the first circuit and an inductor of the second inductor assembly.
- a second voltage exceeding the first voltage may be obtained from the first voltage applied to the inductor of the second inductor assembly, based at least on the inductance.
- the display device may further include a power factor corrector including one end for receiving a rectified AC signal and another end for outputting a power signal generated from the rectified AC signal.
- the display device includes one end connected to the other end of the power factor corrector and the other end connected to one end of the inductor of the first inductor assembly of the transformer, and outputs from the power factor corrector.
- the power signal may be provided to the inductor of the first inductor assembly from the power signal, and may further include an inverter generating another AC signal having an independent phase from the rectified AC signal.
- the second bobbin of the second inductor assembly includes a tube portion including one end formed with the second opening and the other end formed with a third opening different from the second opening. can do.
- a cross-sectional area of the third opening formed at the other end of the tube part of the second bobbin may correspond to a cross-sectional area of an outer circumference of the first inductor assembly.
- the tube portion of the second bobbin includes a first portion including the one end at which the second opening is formed and having a length of the second portion of the core, and the third portion of the core. It may include the other end having an opening and a second part connected to the first part.
- a display device includes a first surface and a protrusion protruding from the first surface along a direction in which the first surface faces, and having a cross section perpendicular to the direction and having a first area. It may include a transformer including a first core including (a protruding portion).
- the transformer of the display device may include a first bobbin including a first opening corresponding to the first area and contacting an outer circumference of the protrusion of the first core, and a first inductor including an inductor wound around the first bobbin. assembly may be included.
- the transformer of the display device may include a second surface facing and spaced apart from the first surface of the first core, protruding from the second surface along a direction in which the second surface faces, and perpendicular to the direction in which the second surface faces.
- a cross section may include a second core including a protruding portion having a second area distinct from the first area.
- the transformer of the display device may include a second bobbin including a second opening corresponding to the second area and contacting an outer circumference of the protrusion of the second core, and a second inductor including an inductor wound around the second bobbin. assembly may be included.
- the first bobbin of the first inductor assembly has an inner circumference corresponding to a first area of the first opening and exceeds a length of the protruding portion of the first inductor assembly, and 1
- the inductor of the inductor assembly may include a first tube portion wound on an outer circumference.
- the first bobbin of the first inductor assembly may include a first flange portion extending from one end of the first tube portion in a direction perpendicular to the first tube portion.
- the second bobbin of the second inductor assembly may include a second tube portion having an inner circumference corresponding to the second area of the second opening and around which the inductor of the second inductor assembly is wound.
- the second bobbin of the second inductor assembly may include a second flange portion extending from one end of the second tube portion in a direction perpendicular to the second tube portion.
- the first tube part and the second tube part corresponding to each of the first flange part and the second flange part being in contact with each other, the first inductor A gap may be included between one end of the protrusion of the assembly and one end of the protrusion of the second inductor assembly.
- the transformer further includes a third bobbin including a third opening corresponding to an outer circumference of the first inductor assembly and a third inductor assembly including an inductor wound around the third bobbin.
- the third inductor assembly may contact at least a portion of an outer circumference of the first inductor assembly.
- the transformer is configured to generate a magnetic flux of the inductor of the first inductor assembly generated by the first current based on the inductor of the first inductor assembly receiving the first current.
- a second current induced in the inductor of the second inductor assembly may be output.
- the transformer based on the inductor of the first inductor assembly receiving the first current, the inductor of the third inductor assembly based on the magnetic flux of the inductor of the first inductor assembly generated by the first current The induced third current may be output.
- the second current may be generated based on a first leakage inductance between an inductor of the first inductor assembly and an inductor of the second inductor assembly.
- the third current may be generated based on a second leakage inductance between the inductor of the first inductor assembly and the inductor of the third inductor assembly.
- the first leakage inductance may be greater than the second leakage inductance.
- the transformer further includes a fourth bobbin including a fourth opening corresponding to an outer circumference of the first inductor assembly and a fourth inductor assembly including an inductor wound around the fourth bobbin.
- the fourth inductor assembly may come into contact with another part within the transformer, which is different from a part contacted by the third inductor assembly at an outer circumference of the first inductor assembly.
- the display device includes a display panel including one or more LEDs (Light Emitting Diodes), a first circuit for controlling brightness of the one or more LEDs included in the display panel, and the A second circuit distinct from the first circuit may be further included.
- the transformer may be electrically connected to the first circuit through an inductor of the second inductor assembly.
- the transformer may be electrically connected to the second circuit through an inductor of the third inductor assembly and an inductor of the fourth inductor assembly.
- devices and components described in the embodiments include a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), and a programmable PLU (programmable logic unit). logic unit), microprocessor, or any other device capable of executing and responding to instructions.
- the processing device may run an operating system (OS) and one or more software applications running on the operating system.
- a processing device may also access, store, manipulate, process, and generate data in response to execution of software.
- the processing device includes a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that it can include.
- a processing device may include a plurality of processors or a processor and a controller. Other processing configurations are also possible, such as parallel processors.
- Software may include a computer program, code, instructions, or a combination of one or more of the foregoing, which configures a processing device to operate as desired or processes independently or collectively. You can command the device.
- the software and/or data may be embodied in any tangible machine, component, physical device, computer storage medium or device to be interpreted by or to provide instructions or data to a processing device. there is.
- Software may be distributed on networked computer systems and stored or executed in a distributed manner.
- Software and data may be stored on one or more computer readable media.
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Abstract
Description
Claims (15)
- 디스플레이 장치(display device)에 있어서,제1 면 및 상기 제1 면이 향하는 방향을 따라(along) 상기 제1 면으로부터 돌출되는 돌출부(a protruding portion)를 포함하는 코어, 상기 제1 면이 향하는 상기 방향에 수직하는 상기 돌출부의 제1 부분의 단면은 제1 면적을 가지고, 상기 제1 부분 및 상기 제1 면 사이의 상기 돌출부의 제2 부분의 단면은, 상기 제1 면적보다 넓은 제2 면적을 가짐;상기 코어의 제1 부분의 외주(outer circumference)에 접하도록, 상기 제1 면적에 대응하는 제1 개구를 포함하는 제1 보빈 및 상기 제1 보빈에 감겨진(wound) 인덕터(an inductor)를 포함하는 제1 인덕터 조립체(a first inductor sub-assembly); 및상기 코어의 제2 부분의 외주에 접하도록, 상기 제2 면적에 대응하는 제2 개구를 포함하는 제2 보빈 및 상기 제2 보빈에 감겨진 인덕터(an inductor)를 포함하는 제2 인덕터 조립체를 포함하는 트랜스포머(a transformer)를 포함하는 디스플레이 장치.
- 제1항에 있어서,상기 트랜스포머는,상기 코어의 제1 면에 마주하며 떨어진 제2 면 및 상기 제2 면이 향하는 방향을 따라 상기 제2 면으로부터 돌출되는 돌출부(a protruding portion)을 포함하는 다른 코어, 상기 제2 면이 향하는 방향에 수직하는 상기 다른 코어의 돌출부의 단면은 상기 코어의 돌출부의 상기 제1 면적을 가짐;를 더 포함하고,상기 다른 코어의 돌출부는,상기 제1 인덕터 조립체의 제1 개구 내에 삽입되어, 상기 제1 인덕터 조립체의 내주(inner circumference)의 적어도 일부분에 접하는 디스플레이 장치.
- 제2항에 있어서,상기 제1 인덕터 조립체의 제1 보빈은,상기 제1 개구의 제1 면적에 대응하는 내주를 가지고, 상기 제1 인덕터 조립체의 인덕터가 외주에 감겨진 튜브부(a tube portion)를 더 포함하고,상기 튜브부의 내주에 삽입된 상기 코어의 돌출부의 일 단 및 다른 코어의 돌출부의 일 단 사이의 공간은, 공극(air gap)을 형성하는 디스플레이 장치.
- 제3항에 있어서,상기 제1 인덕터 조립체의 제1 보빈은,상기 튜브부의 일 단으로부터, 상기 튜브부에 수직인 방향을 따라 연장된 플랜지부(a flange portion)를 더 포함하고,상기 플랜지부는,상기 코어의 돌출부의 제1 부분 및 상기 코어의 돌출부의 제2 부분 사이의 경계선을 포함하는, 상기 코어의 돌출부의 제2 부분의 일 면에 접하는 디스플레이 장치.
- 제1항에 있어서,상기 트랜스포머는,상기 제1 인덕터 조립체의 외주에 대응하는 제3 개구를 포함하는 제3 보빈 및 상기 제3 보빈에 감겨진 인덕터를 포함하는 제3 인덕터 조립체를 더 포함하고,상기 제3 인덕터 조립체는,상기 제1 인덕터 조립체의 외주의 적어도 일부분에 접하는 디스플레이 장치.
- 제5항에 있어서,상기 트랜스포머는,제1 전류를 수신하는 상기 제1 인덕터 조립체의 인덕터에 기반하여, 상기 제1 전류에 의해 발생되는 상기 제1 인덕터 조립체의 인덕터의 자속에 기반하여 상기 제2 인덕터 조립체의 인덕터에 유도되는 제2 전류를 출력하고; 및상기 제1 전류를 수신하는 상기 제1 인덕터 조립체의 인덕터에 기반하여, 상기 제1 전류에 의해 발생되는 상기 제1 인덕터 조립체의 인덕터의 자속에 기반하여 상기 제3 인덕터 조립체의 인덕터에 유도되는 제3 전류를 출력하는 디스플레이 장치.
- 제6항에 있어서,상기 제2 전류는,상기 제1 인덕터 조립체의 인덕터 및 상기 제2 인덕터 조립체의 인덕터 사이의 제1 누설 인덕턴스에 기반하여 발생되고,상기 제3 전류는,상기 제1 인덕터 조립체의 인덕터 및 상기 제3 인덕터 조립체의 인덕터 사이의 제2 누설 인덕턴스에 기반하여 발생되고,상기 제1 누설 인덕턴스는 상기 제2 누설 인덕턴스 보다 큰 디스플레이 장치.
- 제5항에 있어서,상기 트랜스포머는,상기 제1 인덕터 조립체의 외주에 대응하는 제4 개구를 포함하는 제4 보빈 및 상기 제4 보빈에 감겨진 인덕터를 포함하는 제4 인덕터 조립체를 더 포함하고,상기 제4 인덕터 조립체는,상기 트랜스포머 내에서, 상기 제1 인덕터 조립체의 외주에서 상기 제3 인덕터 조립체가 접하는 일부분과 구별되는 다른 일부분에 접하는 디스플레이 장치.
- 제8항에 있어서,상기 트랜스포머는,제1 전류를 수신하는 상기 제1 인덕터 조립체의 인덕터에 기반하여, 상기 제1 전류에 의해 발생되는 상기 제1 인덕터 조립체의 인덕터에서 발생되는 자속에 기반하여 상기 제3 인덕터 조립체의 인덕터에 유도되고, 상기 제1 인덕터 조립체 및 상기 제3 인덕터 조립체 사이의 제1 누설 인덕턴스에 기반하여 발생되는 제2 전류를 출력하고,상기 제1 전류를 수신하는 상기 제1 인덕터 조립체의 인덕터에 기반하여, 상기 제1 전류에 의해 발생되는 상기 제1 인덕터 조립체의 인덕터에서 발생되는 자속에 기반하여 상기 제4 인덕터 조립체의 인덕터에서 유도되고, 상기 제1 누설 인덕턴스에 대응하고, 상기 제1 인덕터 조립체 및 상기 제4 인덕터 조립체 사이의 제2 누설 인덕턴스에 기반하여 발생되는 제3 전류를 출력하는 디스플레이 장치.
- 제8항에 있어서,상기 디스플레이 장치는,하나 이상의 LED들(Light Emitting Diodes)을 포함하는 디스플레이 패널;상기 디스플레이 패널에 포함된 상기 하나 이상의 LED들의 밝기를 제어하기 위한 제1 회로; 및상기 제1 회로와 구별되는 제2 회로를 더 포함하고,상기 트랜스포머는,상기 제2 인덕터 조립체의 인덕터를 통해 상기 제1 회로와 전기적으로 연결되고,상기 제3 인덕터 조립체의 인덕터 및 상기 제4 인덕터 조립체의 인덕터를 통해 상기 제2 회로와 전기적으로 연결되는 디스플레이 장치.
- 제10항에 있어서,상기 제1 회로는,상기 제1 회로에 연결된 상기 제2 인덕터 조립체의 인덕터를 통해 제공되는 상기 제1 인덕터 조립체의 인덕터 및 상기 제2 인덕터 조립체의 인덕터 사이의 누설 인덕턴스에 적어도 기반하여, 상기 제2 인덕터 조립체의 인덕터에 인가되는 제1 전압으로부터, 상기 제1 전압을 초과하는 제2 전압을 획득하는 디스플레이 장치.
- 제1항에 있어서,상기 디스플레이 장치는,정류된 교류 신호를 수신하는 일 단 및 상기 정류된 교류 신호로부터 생성된 전력 신호를 출력하는 타 단을 포함하는 역률 보정기; 및상기 역률 보정기의 타 단에 연결되는 일 단(an end)을 포함하고, 상기 트랜스포머의 제1 인덕터 조립체의 인덕터의 일 단에 연결되는 타 단을 포함하고, 상기 역률 보정기로부터 출력되는 상기 전력 신호로부터 상기 제1 인덕터 조립체의 인덕터에 제공되고, 상기 정류된 교류 신호와 독립적인 위상을 가지는 다른 교류 신호를 생성하는 인버터를 더 포함하는 디스플레이 장치.
- 제1항에 있어서,상기 제2 인덕터 조립체의 상기 제2 보빈은, 상기 제2 개구가 형성된 일 단, 및 상기 제2 개구와 상이한 제3 개구가 형성된 타 단을 포함하는 튜브부를 포함하는, 디스플레이 장치.
- 제13항에 있어서,상기 제2 보빈의 상기 튜브부의 상기 타 단에 형성된 상기 제3 개구의 단면적은, 상기 제1 인덕터 조립체의 외주의 단면적에 대응하는, 디스플레이 장치.
- 제13항에 있어서,상기 제2 보빈의 상기 튜브부는,상기 제2 개구가 형성된 상기 일 단을 포함하고, 상기 코어의 상기 제2 부분의 길이를 가지는 제1 부분, 및 상기 제3 개구가 형성된 상기 타 단을 포함하고, 상기 제1 부분에 연결된 제2 부분을 포함하는, 디스플레이 장치.
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EP22864830.9A EP4373071A1 (en) | 2021-09-02 | 2022-06-09 | Display device including transformer including core having structure related to degree of coupling of inductor |
CN202280059195.XA CN117897947A (zh) | 2021-09-02 | 2022-06-09 | 包括变压器的显示设备,所述变压器包括具有与电感器的耦合程度相关的结构的芯 |
US17/861,342 US20230065839A1 (en) | 2021-09-02 | 2022-07-11 | Display device comprising transformer comprising core having structure related with coupling factor of inductor |
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KR1020210116821A KR20230033884A (ko) | 2021-09-02 | 2021-09-02 | 인덕터의 결합도와 관련된 구조를 가지는 코어를 포함하는 트랜스포머를 포함하는 디스플레이 장치 |
KR10-2021-0116821 | 2021-09-02 |
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Citations (5)
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KR20120070925A (ko) * | 2010-12-22 | 2012-07-02 | 삼성전기주식회사 | 트랜스포머 및 이를 구비하는 디스플레이 장치 |
KR20130002884A (ko) * | 2011-06-29 | 2013-01-08 | 엘지이노텍 주식회사 | 트랜스포머 및 이를 구비한 디스플레이장치 |
KR20130008655A (ko) * | 2011-06-14 | 2013-01-22 | 삼성전기주식회사 | 트랜스포머 및 이를 구비하는 디스플레이 장치 |
US20140125442A1 (en) * | 2010-07-02 | 2014-05-08 | Samsung Electro-Mechanics Co., Ltd. | Transformer and flat panel display device including the same |
KR20140113249A (ko) * | 2013-03-14 | 2014-09-24 | 삼성전기주식회사 | 코일 부품 및 이를 구비하는 전자 기기 |
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US20140125442A1 (en) * | 2010-07-02 | 2014-05-08 | Samsung Electro-Mechanics Co., Ltd. | Transformer and flat panel display device including the same |
KR20120070925A (ko) * | 2010-12-22 | 2012-07-02 | 삼성전기주식회사 | 트랜스포머 및 이를 구비하는 디스플레이 장치 |
KR20130008655A (ko) * | 2011-06-14 | 2013-01-22 | 삼성전기주식회사 | 트랜스포머 및 이를 구비하는 디스플레이 장치 |
KR20130002884A (ko) * | 2011-06-29 | 2013-01-08 | 엘지이노텍 주식회사 | 트랜스포머 및 이를 구비한 디스플레이장치 |
KR20140113249A (ko) * | 2013-03-14 | 2014-09-24 | 삼성전기주식회사 | 코일 부품 및 이를 구비하는 전자 기기 |
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