WO2019019531A1 - 一种供电装置及显示系统 - Google Patents
一种供电装置及显示系统 Download PDFInfo
- Publication number
- WO2019019531A1 WO2019019531A1 PCT/CN2017/116275 CN2017116275W WO2019019531A1 WO 2019019531 A1 WO2019019531 A1 WO 2019019531A1 CN 2017116275 W CN2017116275 W CN 2017116275W WO 2019019531 A1 WO2019019531 A1 WO 2019019531A1
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- Prior art keywords
- module
- output
- comparator
- resistor
- voltage
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
-
- 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
-
- 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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4436—Power management, e.g. shutting down unused components of the receiver
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/025—Reduction of instantaneous peaks of current
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
Definitions
- the present application relates to the field of electronic technologies, and in particular, to a power supply device and a display system.
- LCD TVs are increasingly moving toward large size and high resolution, so the power consumption of LCD TVs is correspondingly increased. As the TV power consumption increases, electromagnetic interference generated by various components (Electromagnetic)
- the commonly used method is to add EMI suppression component to the power output terminal, or use RC (resistor and capacitor series) snubber circuit, but EMI suppression component can only weaken part of conducted interference, and can't do anything against radiated interference.
- RC snubber circuit can be used for low power circuit. It has a certain effect, but it is generally ineffective for high-power circuits.
- the power supply apparatus provided by the embodiment of the present application includes:
- a power module having a positive output terminal and a negative output terminal, wherein the power module is configured to provide an output voltage
- the voltage regulation module the one end of the voltage regulation module is electrically connected to the positive output end of the power module, and the other end of the voltage regulation module is electrically connected to the negative output end of the power module.
- the negative output end of the power module is grounded to control a stable output of the output voltage;
- the power module further includes a diode, a positive pole of the diode is connected to the other end of the inductor, and a cathode of the diode is a positive output end of the power module.
- the power module further includes a capacitor, and one end of the capacitor is connected to a cathode of the diode
- the other end of the capacitor is connected to a negative pole of the input power source.
- the voltage regulation module includes:
- an oscillator an input end of the oscillator is connected to an output end of the frequency adjustment module
- a second comparator an output end of the oscillator is connected to an inverting input end of the second comparator, an output end of the first comparator and a positive phase input end of the second comparator Connected
- a switching unit an output end of the second comparator is connected to a gate of the switching unit, a source of the switching unit is grounded, a drain of the switching unit is opposite to the inductor Connected to the other end;
- a first resistor one end of the first resistor is connected to a positive output end of the power module, and one end of the first resistor is further connected to an inverting input end of the first comparator;
- the second resistor, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is grounded.
- the frequency adjustment module includes:
- a decoding unit configured to receive and decode a control signal of the external controller
- the digital-to-analog conversion unit is configured to perform digital-to-analog conversion on the received decoded control signal, and send the signal to an oscillator to adjust a frequency of an output voltage of the oscillator.
- the decoding unit is a synchronous serial decoding unit, and performs signal exchange with an external controller through a synchronous serial bus.
- the voltage regulation module further includes a temperature detecting unit, wherein the temperature detecting unit is connected to the synchronous serial decoding unit by the digital-to-analog conversion unit to perform digital-to-analog conversion on the temperature detection signal. It is then transmitted to the external controller via the synchronous serial bus.
- the power supply device provided by the embodiment of the present application includes: [0025] a power module having a positive output terminal and a negative output terminal, wherein the power module is configured to provide an output voltage;
- a voltage regulation module one end of the voltage regulation module is electrically connected to a positive output end of the power module
- the other end of the voltage regulation module is electrically connected to the negative output end of the power module, and the negative output end of the power module is grounded to control the stable output of the output voltage;
- a frequency adjustment module the input end of the frequency adjustment module is electrically connected to an external controller, and an output end of the frequency adjustment module is electrically connected to the voltage regulation adjustment module, and receives an external controller Control signal to adjust the operating frequency of the voltage regulation module;
- an input power source a negative pole of the input power source is connected to another end of the voltage regulation module;
- a diode a positive pole of the diode is connected to the other end of the inductor, and a cathode of the diode is a positive output end of the power module;
- an oscillator an input end of the oscillator is connected to an output end of the frequency adjustment module
- a first comparator the first phase of the first comparator is connected to a reference voltage
- a second comparator an output end of the oscillator is connected to an inverting input end of the second comparator, an output end of the first comparator and a positive phase input end of the second comparator Connected
- a switching unit an output end of the second comparator is connected to a gate of the switching unit, a source of the switching unit is grounded, a drain of the switching unit is opposite to the inductor Connected to the other end;
- a first resistor one end of the first resistor is connected to a positive output end of the power module, and one end of the first resistor is further connected to an inverting input end of the first comparator;
- a second resistor the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is grounded.
- a display system provided by an embodiment of the present application includes:
- a power supply device configured to supply power to the display panel, where the power supply device includes:
- the other end of the voltage regulation module is electrically connected to the negative output end of the power module, and the negative output end of the power module is grounded to control the stable output of the output voltage;
- the power module includes an input power source and an inductor, a positive pole of the input power source is connected to one end of the inductor, and another end of the inductor is connected to one end of the voltage regulator adjustment module, The negative pole of the input power supply is connected to the other end of the voltage regulation module.
- the power module further includes a diode, a positive pole of the diode is connected to the other end of the inductor, and a cathode of the diode is a positive output end of the power module.
- the voltage regulation module includes:
- a first comparator a first phase input of the first comparator is connected to a reference voltage
- a second comparator an output end of the oscillator is connected to an inverting input end of the second comparator, an output end of the first comparator and a positive phase input end of the second comparator Connected
- a switching unit an output end of the second comparator is connected to a gate of the switching unit, a source of the switching unit is grounded, a drain of the switching unit is opposite to the inductor Connected to the other end;
- a first resistor one end of the first resistor is connected to a positive output end of the power module, and one end of the first resistor is further connected to an inverting input end of the first comparator;
- a second resistor the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is grounded.
- a decoding unit configured to receive and decode a control signal of the external controller
- the voltage regulation module further includes a temperature detecting unit, wherein the temperature detecting unit is connected to the synchronous serial decoding unit by the digital-to-analog conversion unit to perform digital-to-analog conversion on the temperature detection signal. It is then transmitted to the external controller via the synchronous serial bus.
- the power supply device of the embodiment of the present application is not only simple in structure, but also can reduce the generation of electromagnetic radiation on the basis of normal and stable power supply of the input power source, thereby reducing electromagnetic radiation interference.
- the frequency adjustment module adjusts the relevant frequency in the voltage regulation module to disperse the relevant frequency within a certain range, thereby dispersing the radiant energy of the power source on different frequency segments, thereby avoiding The radiant energy is excessively concentrated at a certain frequency, thereby attenuating the interference of electromagnetic radiation on other components.
- the setting of the temperature detecting unit can also detect the internal temperature of the voltage regulator module, thereby better protecting the entire power supply unit.
- FIG. 1 is a block diagram of a power supply device according to an embodiment of the present application.
- FIG. 2 is a circuit structural diagram of a power supply device according to an embodiment of the present application.
- FIG. 3 is a graph of radiation amplitude relationship of the frequency adjustment module not enabled.
- FIG. 4 is a frequency change diagram of the oscillator after the frequency adjustment module is enabled.
- FIG. 5 is a graph of radiation amplitude relationship after the frequency adjustment module is activated.
- FIG. 6 is a block diagram of a display system according to an embodiment of the present application. Embodiments of the invention
- a power supply device includes a power module 1 for providing an output voltage Vo, a voltage regulation module 2, and an end of the voltage regulation module 2
- the positive output terminal of the power module 1 is electrically connected, the other end of the voltage regulator module 2 is electrically connected to the negative output end of the power module 1, and the negative output terminal of the power module 1 is grounded to control the a stable output of the output voltage Vo;
- a frequency adjustment module 3 the input end of the frequency adjustment module 3 is electrically connected to an external controller, and the output end of the frequency adjustment module 3 is electrically connected to the voltage regulation module 2 Sexually connected, and by adjusting the control signal of the external controller to adjust the operating frequency of the voltage regulation module 2.
- the frequency adjustment module 3 adjusts the driving signal generated by the voltage regulation adjustment module 2 under the control of the external controller to spread the fixed frequency on the basis of the normal and stable power supply of the power module 1 to reduce The amplitude produced by the radiation.
- the power module 1 may include an input power source Vi and an inductor L, and the input power source Vi
- the positive pole is connected to one end of the inductor L
- the other end of the inductor L is connected to one end of the voltage regulator module 2
- the cathode of the input power source Vi is connected to the other end of the voltage regulator module 2.
- the inductor L can be continuously charged and discharged under the action of the voltage regulation module 2, thereby achieving the purpose of stably adjusting the output voltage Vo.
- the power module 1 may further include a diode D, a positive pole of the diode D is connected to the other end of the inductor L, and a cathode of the diode D is a positive output of the power module. end.
- the anode of the diode D can also be connected to one end of the voltage regulation module 2. The diode D can ensure the stability of the power output and can effectively protect the power module and improve safety performance.
- the voltage regulation module 2 may include an oscillator 20, a first comparator U1, a second comparator U2, a switching unit 0, a first resistor R1, and a second resistor R2, the oscillator An input end of the terminal 20 is connected to an output end of the frequency adjustment module 3, an output end of the oscillator 20 is connected to an inverting input end of the second comparator U2, and one end of the first resistor R1 is The other end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is grounded, and one end of the first resistor R1 is also connected.
- An inverting input terminal of the first comparator U1 is connected, a non-inverting input terminal of the first comparator U1 is connected with a reference voltage Vref, an output end of the first comparator U1 and the second comparator U2
- the non-inverting input terminal is connected, the output end of the second comparator U2 is connected to the gate of the switching unit Q, the source of the switching unit Q is grounded, and the drain of the switching unit Q is The other end of the inductor L is connected.
- the conduction and the breaking of the switching unit Q can be controlled, thereby realizing charging and discharging of the inductor L. .
- the output voltage Vo is too large, the feedback voltage is correspondingly excessive, and if the feedback voltage is greater than the reference voltage Vref, the first output signal outputted by the output of the first comparator U1 is low.
- the turn-on unit Q When the turn-on unit Q is turned on, the turn-on time will become smaller, that is, the turn-on of the inductor L will become smaller, and the output voltage Vo will also become smaller accordingly, specifically when the first output signal is larger than the output of the oscillator 20.
- the switching unit Q is turned on under the action of the high level, so that the inductor L is charged, and conversely, when the first output signal
- the switching unit Q is broken under the action of the low level, and the inductor L is discharged because the inductor L discharge is longer than inductor L charge
- the output voltage Vo will gradually decrease.
- the frequency adjustment module 3 receives the control signal of the external controller and distributes the fixed frequency of the driving signal output by the oscillator 20 according to the actual situation, so that the radiation value is greatly reduced, and the concentration of the radiant energy is reduced to other The effects of the device and reduce damage to the user's body.
- the frequency adjustment module 3 includes: a decoding unit 30, configured to receive and decode a control signal of an external controller; and a digital to analog conversion unit 31, configured to receive the decoded control The signal is digital-to-analog converted and sent to the oscillator to adjust the frequency of the output voltage of the oscillator.
- the decoding unit 30 may be a synchronous serial decoding unit and exchange signals with an external controller through a synchronous serial bus.
- the synchronous serial bus can be an I2C bus.
- the digital-to-analog conversion unit 31 can convert the digital signal into an analog voltage signal, and different frequency settings correspond to different digital signals, and finally can be converted into different analog voltage outputs through the digital-to-analog conversion unit.
- the analog voltage output is output to the voltage control unit in the oscillator, wherein the voltage control unit functions to control the oscillation of different frequencies through different voltages, that is, complete the synchronous serial setting from the external controller to the final frequency.
- the process of production As can be seen from Fig. 4, if the reference frequency of the oscillator is fl, and the frequency adjustment is set to change from f0 to f2 within T1, it can be seen that the frequency of the oscillator is from f0 to fl in the period of T1. And between fl and f2 ( ⁇ ) ⁇ 1 ⁇ ) continuously circulates, thereby achieving a large reduction in radiant energy as shown in FIG.
- the voltage regulation module 2 of the present application may further include a temperature detecting unit 21, and the temperature detecting unit 21 passes the digital-to-analog converting unit 31 and the synchronous serial decoding unit. Connected to digitally convert the temperature detection signal to the external controller through the synchronous serial bus.
- the setting of the temperature detecting unit 21 can convert the temperature inside the voltage regulating module 2 into a digital form and transmit it to the external controller through the synchronous serial bus, thereby facilitating the user to understand and control the temperature inside the regulating voltage regulating module 2, Has great practicality.
- the display panel 101 may be a liquid crystal display panel, an OLED display panel, a QLED display panel, a curved display panel, or other types of display panels, and is not specifically limited herein.
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- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/621,182 US20200302890A1 (en) | 2017-04-25 | 2017-12-14 | Power Supply Apparatus and Display System |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710612597.9A CN107181924A (zh) | 2017-07-25 | 2017-07-25 | 一种供电装置及显示系统 |
CN201710612597.9 | 2017-07-25 |
Publications (1)
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WO2019019531A1 true WO2019019531A1 (zh) | 2019-01-31 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/CN2017/116275 WO2019019531A1 (zh) | 2017-04-25 | 2017-12-14 | 一种供电装置及显示系统 |
Country Status (3)
Country | Link |
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US (1) | US20200302890A1 (zh) |
CN (1) | CN107181924A (zh) |
WO (1) | WO2019019531A1 (zh) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107181924A (zh) * | 2017-07-25 | 2017-09-19 | 惠科股份有限公司 | 一种供电装置及显示系统 |
CN110992863B (zh) * | 2019-11-25 | 2023-05-30 | 京东方科技集团股份有限公司 | 电磁干扰抑制电路及其驱动方法、电子设备 |
CN113163140B (zh) * | 2020-01-22 | 2023-05-09 | 海信视像科技股份有限公司 | 显示装置 |
CN114023280B (zh) * | 2021-11-18 | 2022-11-08 | 深圳市华星光电半导体显示技术有限公司 | 电压控制电路、显示面板 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040217748A1 (en) * | 2003-04-30 | 2004-11-04 | Michael Andrews | Emi reduction of power converters by way of controlled randomized modulation of oscillating signals |
CN101835008A (zh) * | 2010-01-12 | 2010-09-15 | 北京利亚德电子科技有限公司 | Led面板电视显示设备通信控制系统 |
CN101931334A (zh) * | 2009-06-18 | 2010-12-29 | 快捷韩国半导体有限公司 | 频率调制控制器、开关模式电源及开关操作频率调制方法 |
CN101998730A (zh) * | 2009-08-24 | 2011-03-30 | 艾默龙电子科技(嘉兴)有限公司 | 高效率led驱动方法 |
CN105958820A (zh) * | 2016-06-07 | 2016-09-21 | 广东希荻微电子有限公司 | 迟滞式控制器pwm和pfm模式下的控制方法 |
CN107181924A (zh) * | 2017-07-25 | 2017-09-19 | 惠科股份有限公司 | 一种供电装置及显示系统 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8842225B2 (en) * | 2012-05-14 | 2014-09-23 | Rohm Co., Ltd. | Switching power supply device |
CN106406156A (zh) * | 2016-05-31 | 2017-02-15 | 成都众孚理想科技有限公司 | 使用可调脉冲发生器的信号转换电路 |
-
2017
- 2017-07-25 CN CN201710612597.9A patent/CN107181924A/zh active Pending
- 2017-12-14 US US16/621,182 patent/US20200302890A1/en not_active Abandoned
- 2017-12-14 WO PCT/CN2017/116275 patent/WO2019019531A1/zh active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040217748A1 (en) * | 2003-04-30 | 2004-11-04 | Michael Andrews | Emi reduction of power converters by way of controlled randomized modulation of oscillating signals |
CN101931334A (zh) * | 2009-06-18 | 2010-12-29 | 快捷韩国半导体有限公司 | 频率调制控制器、开关模式电源及开关操作频率调制方法 |
CN101998730A (zh) * | 2009-08-24 | 2011-03-30 | 艾默龙电子科技(嘉兴)有限公司 | 高效率led驱动方法 |
CN101835008A (zh) * | 2010-01-12 | 2010-09-15 | 北京利亚德电子科技有限公司 | Led面板电视显示设备通信控制系统 |
CN105958820A (zh) * | 2016-06-07 | 2016-09-21 | 广东希荻微电子有限公司 | 迟滞式控制器pwm和pfm模式下的控制方法 |
CN107181924A (zh) * | 2017-07-25 | 2017-09-19 | 惠科股份有限公司 | 一种供电装置及显示系统 |
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US20200302890A1 (en) | 2020-09-24 |
CN107181924A (zh) | 2017-09-19 |
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