WO2018082186A1 - Procédé et dispositif de positionnement d'emi pour télévision - Google Patents

Procédé et dispositif de positionnement d'emi pour télévision Download PDF

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Publication number
WO2018082186A1
WO2018082186A1 PCT/CN2016/113453 CN2016113453W WO2018082186A1 WO 2018082186 A1 WO2018082186 A1 WO 2018082186A1 CN 2016113453 W CN2016113453 W CN 2016113453W WO 2018082186 A1 WO2018082186 A1 WO 2018082186A1
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WIPO (PCT)
Prior art keywords
emi
circuit
unit
subunit
radiation
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PCT/CN2016/113453
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English (en)
Chinese (zh)
Inventor
康伟
Original Assignee
深圳Tcl数字技术有限公司
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Publication of WO2018082186A1 publication Critical patent/WO2018082186A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
    • G01R31/002—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing where the device under test is an electronic circuit

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an EMI positioning method and apparatus for a television set.
  • Electromagnetic interference referred to as EMI (EMI, Electro Magnetic Interference (electromagnetic interference) is a signal that is harmful to the human body or the environment. Electrical products, especially TV sets, usually need to be tested by EMI to confirm whether the product can meet the EMI requirements of the sales territory. When the TV cannot meet the sales territory. When EMI indicators are required, TV manufacturers must take effective measures to improve them until they reach the EMI requirements for the sales territory. In the prior art, there are many methods for improving the EMI of a television set, such as adding a absorbing material such as a magnetic ring, an aluminum foil or a foam, or adding shielding measures, or adding a component such as a capacitor, a magnetic bead, or the like to a corresponding circuit of the television.
  • EMI Electromagnetic interference
  • the main object of the present invention is to provide an EMI positioning method for a television set, which aims to improve EMI positioning efficiency and improve EMI positioning accuracy.
  • the present invention provides an EMI positioning method for a television set, and the EMI positioning method of the television set includes the following steps:
  • the EMI radiation value detected by the EMI detector for each EMI circuit subunit under different working states, different working modules or different operating frequencies, the EMI radiation value including an EMI radiation frequency value and an EMI radiation amplitude value;
  • the EMI interference source circuit sub-unit is determined by analysis.
  • the method before receiving the preset EMI test command, before controlling the working state, the working module or the working frequency of each tested EMI circuit subunit of the television set, the method further includes:
  • the television is divided into modules, and the television is divided into several EMI modules;
  • each of the EMI modules contains a switching signal or a high-frequency signal
  • each of the EMI modules is separately divided into circuit units, and each of the EMI modules is divided into a plurality of EMI circuit units;
  • Each of the EMI circuit units is divided into sub-unit circuits according to whether each of the EMI circuit units includes a switching signal or a high-frequency signal, and each of the EMI circuit units is divided into a plurality of EMI circuit sub-units to be tested.
  • controlling the working state, the working module or the operating frequency of each tested EMI circuit subunit of the television set includes:
  • the EMI test UI interface includes each of the EMI modules of the television set, and an EMI circuit unit corresponding to each of the EMI modules And a measured EMI circuit subunit corresponding to each EMI circuit unit;
  • the operating state, the working circuit unit, or the operating frequency of the selected EMI circuit subunit is controlled.
  • the analyzing and determining the EMI interference source circuit subunit according to the obtained EMI radiation value comprises:
  • the measured EMI circuit subunit is EMI Interference source circuit unit
  • the EMI circuit subunit to be tested When the operating state of the EMI circuit subunit to be tested is changed, if the obtained EMI radiation frequency value and the EMI radiation amplitude value are not changed, it is determined that the EMI circuit subunit to be tested is not an EMI interference source circuit unit.
  • the analyzing and determining the EMI interference source circuit sub-unit according to the obtained EMI radiation value further includes:
  • the EMI circuit subunit is an EMI interference source circuit unit
  • the unit is not an EMI interference source circuit unit
  • the EMI radiation sub-unit When the EMI radiation sub-unit is not in operation, the EMI radiation value is obtained, and then the EMI circuit sub-unit under test is determined not to be an EMI interference source circuit unit.
  • the present invention also provides an EMI positioning device for a television set, where the EMI positioning device of the television set includes:
  • Control module for controlling the working state, working module or working frequency of each EMI circuit sub-unit of the television when receiving the preset EMI test command;
  • EMI radiation value acquisition module used to obtain the EMI radiation value detected by the EMI detector for each EMI circuit subunit under different working states, different working modules or different operating frequencies, the EMI radiation value including the EMI radiation frequency Value and EMI radiation amplitude value;
  • the analysis module is configured to analyze and determine the EMI interference source circuit sub-unit according to the obtained EMI radiation value.
  • the EMI positioning device of the television set further comprises:
  • the first dividing module is configured to perform module division on the television according to whether the switching power supply circuit or the high-frequency signal circuit is included, and divide the television into a plurality of EMI modules;
  • a second dividing module configured to divide each of the EMI modules into circuit units according to whether each of the EMI modules includes a switching signal or a high-frequency signal, and divide each of the EMI modules into a plurality of EMI circuit units;
  • a third dividing module configured to divide each of the EMI circuit units into sub-unit circuits according to whether each of the EMI circuit units includes a switching signal or a high-frequency signal, and divide each of the EMI circuit units into a plurality of EMI circuit subunit to be tested.
  • control module comprises:
  • the UI interface calling unit is configured to: call and display a preset EMI test UI interface when receiving the preset EMI test command; the EMI test UI interface includes each of the EMI modules of the television, and each of the EMI The EMI circuit unit corresponding to the module and the EMI circuit subunit corresponding to each EMI circuit unit; when receiving the EMI module selection instruction, calling and displaying each EMI circuit unit corresponding to the selected EMI module; Retrieving and displaying each EMI circuit sub-unit corresponding to the selected EMI circuit unit when the EMI circuit unit selects an instruction;
  • the control unit controls the working state, the working circuit unit or the operating frequency of the selected EMI circuit subunit when receiving the EMI circuit subunit selection command.
  • the analysis module is further configured to:
  • the measured EMI circuit subunit is EMI Interference source circuit unit
  • the EMI circuit subunit to be tested When the operating state of the EMI circuit subunit to be tested is changed, if the obtained EMI radiation frequency value and the EMI radiation amplitude value are not changed, it is determined that the EMI circuit subunit to be tested is not an EMI interference source circuit unit.
  • the analysis module is further configured to:
  • the EMI circuit subunit is an EMI interference source circuit unit
  • the unit is not an EMI interference source circuit unit
  • the EMI radiation sub-unit When the EMI radiation sub-unit is not in operation, the EMI radiation value is obtained, and then the EMI circuit sub-unit under test is determined not to be an EMI interference source circuit unit.
  • the invention provides an EMI positioning method for a television set.
  • the EMI positioning method of the television set comprises the following steps: when receiving a preset EMI test command, working state and working on each measured EMI circuit subunit of the television set Controlling the module or operating frequency; obtaining the EMI radiation value detected by the EMI detector for each EMI circuit subunit under different operating states, different working modules or different operating frequencies, the EMI radiation value including the EMI radiation frequency value And EMI radiation amplitude value; according to the obtained EMI radiation value, the EMI interference source circuit sub-unit is determined by analysis.
  • the EMI positioning method of the television set of the invention has the advantages of high EMI positioning efficiency and high EMI positioning accuracy.
  • FIG. 1 is a schematic flow chart of a first embodiment of an EMI positioning method for a television set according to the present invention
  • FIG. 2 is a schematic flow chart of a second embodiment of an EMI positioning method for a television set according to the present invention
  • FIG. 3 is a schematic flow chart of a third embodiment of an EMI positioning method for a television set according to the present invention.
  • FIG. 4 is a schematic diagram of functional modules of a first embodiment of an EMI positioning apparatus for a television set according to the present invention
  • FIG. 5 is a schematic diagram of functional modules of a second embodiment of an EMI positioning apparatus for a television set according to the present invention.
  • FIG. 6 is a schematic diagram of a refinement function module of a control module in a third embodiment of an EMI positioning apparatus for a television set according to the present invention
  • FIG. 7 is a schematic structural diagram of a first embodiment of an EMI module of a television set in an EMI positioning method of a television set according to the present invention
  • FIG. 8 is a schematic structural diagram of a circuit unit of a movement board in a second embodiment of an EMI module of a television set in an EMI positioning method of a television set according to the present invention
  • FIG. 9 is a schematic structural diagram of a circuit subunit of a SOC circuit unit in a movement board in a third embodiment of an EMI module of a television set in an EMI positioning method of a television set according to the present invention.
  • the present invention provides an EMI positioning method for a television set.
  • the EMI positioning method of the television set includes:
  • Step S10 when receiving the preset EMI test command, controlling the working state, the working module or the working frequency of each tested EMI circuit subunit of the television;
  • the EMI positioning method of the television set provided by the embodiment of the invention is mainly applied to the EMI positioning test system of the television set, and is used for accurately and quickly locating the EMI interference source of the television set, thereby quickly and effectively finding corresponding measures to improve the EMI radiation of the television set.
  • the value of the TV product meets the EMI requirements of the sales territory.
  • the EMI positioning method of the television set is first, when receiving a preset EMI test command, an operating state, a working module, or an operating frequency of each tested EMI circuit subunit of the television set. Take control.
  • the preset EMI test command may be an EMI test command issued by a TV remote controller, for example, an EMI test dedicated button is added to a remote controller of the television, and the tester presses the button.
  • the EMI test dedicated button is used to issue the preset EMI test command, and the television triggers the television to enter the EMI test workflow when receiving the EMI test command issued by the remote controller; in another embodiment, the tester
  • the purpose of inputting the preset EMI test command may also be achieved by pressing a combination of a plurality of digital keys, a plurality of alphabetic keys, or a plurality of numeric keys plus a plurality of alphabetic keys on the remote control of the television, that is, equivalent to passing the remote controller. Entering the preset EMI test password triggers the TV to enter the EMI test.
  • an EMI test dedicated button is added to the remote controller of the television, and the EMI positioning method of the television set of the present invention is performed by pressing the EMI test dedicated button to trigger the television to enter the EMI test.
  • the EMI positioning method of the television set provided by the embodiment, when receiving the preset EMI test command issued by the user by pressing an EMI test dedicated button added on the remote controller, the measured EMI of the television set The operating state, working module or operating frequency of the circuit subunit is controlled.
  • Step S20 Acquire an EMI radiation value detected by the EMI detector for each EMI circuit subunit under different working states, different working modules or different operating frequencies, where the EMI radiation value includes an EMI radiation frequency value and an EMI radiation amplitude. value;
  • Step S30 analyzing and determining the EMI interference source circuit sub-unit according to the obtained EMI radiation value.
  • the EMI circuit subunits of the TV are tested. Control of the working state, working module or working frequency, then pass The EMI detector detects the EMI radiation value (including the EMI radiation frequency value and the EMI radiation amplitude value) of each EMI circuit subunit under different working states, different working modules or different operating frequencies, and then acquires the EMI detector for each measured.
  • the EMI radiation frequency value and the EMI radiation amplitude value detected by the EMI circuit subunit under different working states, different working modules or different operating frequencies, and the EMI interference source is analyzed and determined according to the obtained EMI radiation frequency value and the EMI radiation amplitude value.
  • a circuit subunit that enables positioning of the EMI interference source to the television.
  • the EMI interference source of the television is determined to be specifically in the television. Which circuit subunit is on.
  • controlling the EMI circuit subunit to be tested from the working state to the inactive state ie, the operating state of the EMI circuit subunit under test is changed
  • analyzing the EMI in the case of changing the operating state of the EMI circuit subunit under test Whether the EMI radiation frequency value and the EMI radiation amplitude value detected by the detector are found to be changed, and if the EMI radiation frequency value and the EMI radiation amplitude value detected by the EMI detector are not changed, the measured EMI circuit can be determined.
  • the unit is not the EMI interference source circuit subunit of the television set, that is, the EMI interference source of the television is not on the EMI circuit subunit to be tested, that is, the EMI positioning method of the television set of the embodiment, when the EMI circuit to be tested is changed
  • the EMI circuit sub-unit is not an EMI interference source circuit unit; otherwise, if the measured EMI circuit is changed
  • the EMI circuit subunit is an EMI interference source circuit subunit of the television set, that is, the EMI interference source of the television set can be positioned on the EMI circuit subunit to be tested, that is, the EMI positioning method of the television set of the embodiment, when the When the measured EMI radiation sub-unit is in operation, if the obtained EMI radiation frequency value and the EMI radiation amplitude value do not change, it is determined that the measured EMI circuit sub-unit is not an EMI interference source circuit unit; otherwise, if the measured EMI circuit is changed
  • the EMI circuit subunit is an EMI interference source circuit subunit of the television set,
  • the EMI interference source circuit sub-unit of the television can also be determined. Specifically, when the measured EMI circuit subunit operates, after changing its working mode or changing its working frequency, if the obtained radiation frequency value changes or the acquired radiation amplitude value changes, the judgment center The EMI circuit subunit to be tested is an EMI interference source circuit unit; when the EMI circuit subunit is operated, after changing its working mode or changing its operating frequency, if the obtained EMI radiation frequency value and EMI radiation amplitude value are obtained If no change occurs, it is determined that the EMI circuit subunit to be tested is not an EMI interference source circuit unit.
  • the EMI positioning method of the television provided by the embodiment controls the working state, working module or working frequency of each EMI circuit sub-unit of the television when receiving the preset EMI test command; and then acquires EMI The EMI radiation value detected by the detector for each EMI circuit subunit under different working states, different working modules or different operating frequencies; finally, the EMI interference source circuit subunit is analyzed and determined according to the obtained EMI radiation value.
  • the EMI positioning method of the television set provided by this embodiment has the advantages of high EMI positioning efficiency, high EMI positioning accuracy, and low testing cost for the EMI positioning method for the television set in the prior art.
  • the method further includes:
  • Step S01 according to whether the switching power supply circuit or the high-frequency signal circuit is included, the television is divided into modules, and the television is divided into several EMI modules;
  • Step S02 according to whether each of the EMI modules contains a switching signal or a high-frequency signal, each of the EMI modules is separately divided into circuit units, and each of the EMI modules is divided into a plurality of EMI circuit units;
  • Step S03 according to whether each of the EMI circuit units contains a switching signal or a high-frequency signal, each of the EMI circuit units is divided into sub-unit circuits, and each of the EMI circuit units is divided into a plurality of measured EMI circuits. Subunit.
  • the television is divided into modules according to whether the switching power supply circuit or the high-frequency signal circuit is included.
  • the television 10 is divided into the following EMI modules: the power board 11 and the movement.
  • the board 12 and the liquid crystal display 13, that is, the power board 11, the core board 12, and the liquid crystal display 13 of the television are circuit modules capable of generating EMI radiation.
  • the power board 11, the core board 12 and the liquid crystal display 13 of the television are also referred to as the first level in the television capable of generating EMI radiation interference sources.
  • the key to dividing the level is to see if the module contains The switching power supply circuit or the high-frequency signal circuit part cannot be divided into the first level if it does not include the switching power supply circuit or the high-frequency signal circuit part.
  • the backlight module of a television has a switching current signal (a signal capable of generating EMI radiation) when working, but the backlight module of the television cannot be divided into the above first level because the backlight module of the television
  • the switch signal is provided by the power board. When the power board turns off the backlight signal, the backlight module no longer has a switch current signal.
  • each of the EMI modules is separately divided into circuit units, and each of the EMI modules is divided into a plurality of EMI circuit units, that is, according to each Whether the EMI module contains a switching signal or a high frequency signal when operating, divides each EMI module in the first level of the television into several EMI circuit units. For example, referring to FIG.
  • the present embodiment divides the movement board 12 of the television into the following EMI circuit unit according to whether the movement board 12 (first level) of the television set contains a switching signal or a high frequency signal: the power amplifier circuit
  • the power amplifier circuit unit 121, the network port circuit unit 122, the tuner circuit unit 123, the decoding circuit unit 124, the SOC circuit unit 125, and the power supply circuit unit 126 in the core board 12 are also referred to as televisions.
  • a second level of EMI radiation interference sources can be generated in the machine.
  • the key to the division of the second level is to see whether the circuit contains a switching signal or a high-frequency signal.
  • the specific circuit structure needs to be specifically divided. For example, some SOC circuits have integrated network port circuits, then the network port circuit does not need to be divided.
  • the second level is to see whether the circuit contains a switching signal or a high-frequency signal.
  • each of the EMI circuit units is divided into sub-unit circuits, and each of the EMI circuit units is divided into a plurality of EMI circuits to be tested.
  • the unit that is, according to whether each of the EMI circuit units operates with a switching signal or a high frequency signal, each EMI circuit unit in the second level of the television set is divided into a plurality of EMI circuit subunits to be tested.
  • the present embodiment adjusts the movement of the television according to whether the SOC circuit unit 125 (second level) in the movement board 12 (first level) of the television set contains a switching signal or a high frequency signal.
  • the SOC circuit unit 125 in the board 12 is divided into the following EMI circuit subunits to be tested: a DDR control circuit subunit 1251, a signal input circuit subunit 1252, a signal output circuit subunit 1253, an audio processing circuit subunit 1254, and a video processing circuit. Unit 1255.
  • the DDR control circuit sub-unit 1251, the signal input circuit sub-unit 1252, the signal output circuit sub-unit 1253, the audio processing circuit sub-unit 1254, and the video processing circuit sub-unit 1255 in the SOC circuit 125 are also referred to as televisions.
  • the third level of the machine is capable of generating sources of EMI radiation interference.
  • the third level of division is also to see whether the circuit contains a switching signal or a high frequency signal.
  • the above-mentioned division of the module level of the television set may be divided according to actual needs, and in other embodiments, it may be further divided into more levels.
  • the EMI positioning method of the television set of the present invention is described in detail by dividing the television set into the first level, the second level, and the third level (ie, three levels).
  • the EMI positioning method of the TV set of the present embodiment utilizes the powerful processing and control capability of the TV main chip SOC, and adopts a multi-level modular positioning test method to quickly locate the EMI interference source, that is, by dividing the TV into as many levels as possible.
  • the first level represents several large EMI modules of the TV set. These large EMI modules constitute the possible radiation sources in the entire TV system.
  • the second level is to subdivide the EMI modules in the first level.
  • the third level is to subdivide the EMI circuit cells in the second level into several smaller EMI circuit sub-units.
  • the EMI positioning method of the television set of the embodiment divides the module circuit of the television into the first level, the second level, and the third level, and after receiving the preset EMI test command, the measured EMI of the television
  • the operating state, working module or operating frequency of the circuit subunit ie, the EMI circuit subunit in the third level above
  • the EMI detector is obtained for each EMI circuit subunit under different working states, different working modules or
  • the EMI positioning method of the television set of the embodiment adopts a multi-level modular positioning test method to achieve the purpose of quickly and accurately locating the EMI interference source, so that the EMI positioning method of the television set of the embodiment has high EMI positioning efficiency and accurate EMI positioning.
  • the EMI positioning method of the television set of the present embodiment corresponds to the EMI positioning method in the prior art, the EMI positioning time is greatly shortened, thereby greatly reducing the labor cost.
  • the foregoing step S10 includes:
  • Step S11 when a preset EMI test command is received, calling and displaying a preset EMI test UI interface;
  • the EMI test UI interface includes each of the EMI modules of the television, corresponding to each of the EMI modules An EMI circuit unit and a measured EMI circuit subunit corresponding to each EMI circuit unit;
  • Step S12 when receiving the EMI module selection instruction, calling and displaying each EMI circuit unit corresponding to the selected EMI module;
  • Step S13 when receiving the EMI circuit unit selection instruction, calling and displaying each EMI circuit sub-unit corresponding to the selected EMI circuit unit;
  • Step S14 when receiving the EMI circuit subunit selection command, control the working state, the working circuit unit or the operating frequency of the selected EMI circuit subunit to be tested.
  • the subsequent EMI module selection instruction after the preset EMI test UI interface is invoked and displayed, the subsequent EMI module selection instruction, the EMI circuit unit selection instruction And the input of the EMI circuit subunit selection command can be input through the corresponding button in the orientation selection button on the TV remote control and the OK confirmation button.
  • an EMI positioning test sequence for each of the EMI modules an EMI positioning test sequence for the EMI circuit unit corresponding to each of the EMI modules, and a pair of EMI circuit units
  • the corresponding EMI positioning test sequence of the tested EMI circuit sub-units can be blindly image-based, and the positioning is eliminated one by one.
  • the tester can also select the EMI with the highest probability of EMI interference sources based on his own industry experience.
  • the module, the EMI circuit unit, and the EMI circuit subunit under test are prioritized for EMI testing.
  • the EMI positioning method of the television set of the embodiment is described in detail by taking the EMI positioning test of the movement board of the television as an example:
  • the EMI positioning method of the television set of the embodiment calls and displays a preset EMI test UI interface when receiving a preset EMI test command; and then receives an EMI module selection instruction (the selected test object thereof)
  • a preset EMI test UI interface when receiving a preset EMI test command
  • an EMI module selection instruction (the selected test object thereof)
  • each EMI circuit unit corresponding to the selected movement board is called and displayed, including a power amplifier circuit unit, a network port circuit unit, a tuner circuit unit, a decoding circuit unit, and an SOC.
  • a circuit unit and a power supply circuit unit then, receiving an EMI circuit unit selection instruction (if the test object selected by the instruction is in the movement board) SOC circuit), calling and displaying each EMI circuit subunit corresponding to the selected SOC circuit unit, including a DDR control circuit subunit, a signal input circuit subunit, a signal output circuit subunit, an audio processing circuit subunit, and a video processing circuit subunit; then, receiving an EMI circuit subunit selection instruction (if the test object selected by the instruction is an audio processing circuit subunit in the SOC circuit, ie, the EMI circuit subunit under test is the audio processing In the circuit subunit, the operating state, the working circuit unit or the operating frequency of the selected audio processing circuit subunit are controlled, and then the audio processing circuit subunit is operated in different working states according to the EMI detector.
  • the change in the EMI radiation value ie, the EMI radiation frequency value and the EMI radiation amplitude value
  • the audio processing circuit sub-unit is an EMI interference source circuit sub-unit of the television set.
  • controlling the audio processing circuit sub-unit ie, the EMI circuit sub-unit under test
  • the audio processing circuit sub-unit to change from an active state to an inactive state (ie, the operating state of the audio processing circuit sub-unit has changed)
  • the analysis is changing.
  • the audio processing circuit subunit is a television set.
  • An EMI interference source circuit subunit ie, an EMI interference source of the television set, can be positioned on the audio processing circuit subunit; Subunit processing circuit does not operate, the value of EMI radiation acquired, it is determined that the audio processing circuitry subunit than the EMI source circuit unit.
  • the audio processing circuit subunit may also be determined whether the EMI interference source of the television is in the audio processing circuit. On the unit. Specifically, when the audio processing circuit subunit operates, after changing its working mode or changing its operating frequency, if the obtained radiation frequency value changes or the acquired radiation amplitude value changes, it is determined that the The audio processing circuit subunit is an EMI interference source circuit unit; when the audio processing circuit subunit operates, after changing its working mode or changing its operating frequency, if the obtained EMI radiation frequency value and the EMI radiation amplitude value do not occur If it is changed, it is judged that the audio processing circuit subunit is not an EMI interference source circuit unit.
  • the EMI positioning method of the television set of the embodiment controls the working state, the working circuit unit or the operating frequency of the selected EMI circuit subunit when receiving the EMI circuit subunit selection command, and then according to the EMI detector Determining whether the measured EMI circuit subunit is an EMI interference source circuit of the television set when the measured EMI circuit subunit changes in the EMI radiation value detected by different working states, different working modules or different operating frequencies Subunit.
  • the EMI positioning method of the television set of this embodiment has the advantages of high EMI positioning efficiency and strong EMI positioning accuracy.
  • the present invention also provides an EMI positioning apparatus for a television set.
  • the EMI positioning apparatus 100 of the television set provided by the present invention includes a control module 101, an EMI radiation value acquisition module 102, and an analysis module 103.
  • the control module 101 is configured to control, when receiving a preset EMI test command, an operating state, a working module, or an operating frequency of each tested EMI circuit subunit of the television;
  • the EMI positioning device of the television set provided by the embodiment of the invention is mainly used in the EMI positioning test system of the television set, and is used for accurately and quickly locating the EMI interference source of the television set, thereby quickly and effectively finding corresponding measures to improve the EMI radiation of the television set.
  • the value of the TV product meets the EMI requirements of the sales territory.
  • the EMI positioning apparatus of the television set provided by the embodiment of the present invention is first, when the control module 101 receives a preset EMI test command, the working state of each EMI circuit subunit of the television, The working module or operating frequency is controlled.
  • the preset EMI test command may be an EMI test command issued by a TV remote controller, for example, an EMI test dedicated button is added to a remote controller of the television, and the tester presses the button.
  • the EMI test dedicated button is used to issue the preset EMI test command, and the television triggers the television to enter the EMI test workflow when receiving the EMI test command issued by the remote controller; in another embodiment, the tester
  • the purpose of inputting the preset EMI test command may also be achieved by pressing a combination of a plurality of digital keys, a plurality of alphabetic keys, or a plurality of numeric keys plus a plurality of alphabetic keys on the remote control of the television, that is, equivalent to passing the remote controller. Entering the preset EMI test password triggers the TV to enter the EMI test.
  • an EMI test dedicated button is added to the remote controller of the television, and the user presses the EMI test dedicated button to trigger the television to enter the EMI test work as an example to perform the EMI positioning device of the television set of the present invention.
  • the EMI positioning device of the television set provided by the embodiment, the control module 101, when receiving the preset EMI test command issued by the user by pressing an EMI test dedicated button added on the remote controller, to the television set
  • the operating state, working module or operating frequency of each EMI circuit subunit under test is controlled.
  • the EMI radiation value acquisition module 102 is configured to acquire an EMI radiation value detected by the EMI detector for each EMI circuit subunit under different working states, different working modules or different operating frequencies, where the EMI radiation value includes EMI radiation frequency value and EMI radiation amplitude value;
  • the analyzing module 103 is configured to analyze and determine an EMI interference source circuit sub-unit according to the obtained EMI radiation value.
  • the control module 101 controls each of the television sets. Measure the operating state of the EMI circuit subunit, the control of the working module or the operating frequency, and then pass The EMI detector detects EMI radiation values (including EMI radiation frequency values and EMI radiation amplitude values) of the tested EMI circuit subunits under different operating states, different working modules, or different operating frequencies, and then the EMI radiation value acquiring module 102 Obtaining an EMI radiation frequency value and an EMI radiation amplitude value detected by the EMI detector for each tested EMI circuit subunit under different working states, different working modules or different operating frequencies, and the analyzing module 103 is configured according to the EMI radiation value.
  • EMI radiation values including EMI radiation frequency values and EMI radiation amplitude values
  • the EMI radiation frequency value and the EMI radiation amplitude value acquired by the module 102 are obtained, and the EMI interference source circuit sub-unit is analyzed and determined, thereby realizing the positioning of the EMI interference source of the television.
  • the analysis module 103 analyzes the change of the EMI radiation value of each EMI circuit subunit under different working states, different working modules or different operating frequencies to determine the specific EMI interference source of the television. Which circuit subunit of the TV is on.
  • the control module 101 controls the EMI circuit subunit to be tested to change from the operating state to the inactive state (ie, the operating state of the EMI circuit subunit under test is changed), and the analyzing module 103 analyzes the EMI circuit under test.
  • the EMI circuit subunit to be tested is not an EMI interference source circuit subunit of the television, that is, the EMI interference source of the television is not on the EMI circuit subunit to be tested, that is, the EMI positioning device of the television of this embodiment
  • the analyzing module 103 is further configured to: when the working state of the EMI circuit subunit to be tested is changed, if the obtained EMI radiation frequency value and the EMI radiation amplitude value do not change, determine the measured The EMI circuit subunit is not an EMI interference source circuit unit; conversely, if the EMI radiation frequency value detected by the EMI detector changes after changing the operating state of the EMI circuit subunit under test Or the detected EMI radiation amplitude value changes, it may be determined that the measured
  • the EMI interference source circuit sub-unit of the television can also be determined.
  • the analysis module 103 in the EMI positioning device of the television set of the embodiment is further configured to: when the EMI circuit subunit is operated, change its working mode or change its working frequency, if the obtained radiation frequency value If the change or the obtained radiation amplitude value changes, it is determined that the EMI circuit subunit to be tested is an EMI interference source circuit unit; the analysis module 103 in the EMI positioning device of the television set of the embodiment is further used for When the EMI circuit subunit under test is changed, after changing its working mode or changing its operating frequency, if the obtained EMI radiation frequency value and the EMI radiation amplitude value are not changed, the EMI circuit to be tested is judged.
  • the subunit is not an EMI interference source circuit unit.
  • the EMI positioning device of the television set provided by the embodiment when the control module 101 receives the preset EMI test command, performs the working state, the working module or the working frequency of each EMI circuit subunit of the television. Controlling the EMI radiation value obtained by the EMI detector for each EMI circuit subunit under different operating states, different working modules or different operating frequencies; finally, the analyzing module 103 Based on the obtained EMI radiation value, the EMI interference source circuit sub-unit is determined by analysis.
  • the EMI positioning device of the television set provided by the embodiment has the advantages of high EMI positioning efficiency, high EMI positioning accuracy, and low testing cost.
  • the EMI positioning apparatus 100 of the television set further includes a first division.
  • the first dividing module 104 is configured to divide a television into modules according to whether a switching power supply circuit or a high-frequency signal circuit is included, and divide the television into a plurality of EMI modules;
  • the second dividing module 105 is configured to divide each of the EMI modules into circuit units according to whether each of the EMI modules includes a switching signal or a high frequency signal, and divide each of the EMI modules into a plurality of EMIs. Circuit unit
  • the third dividing module 106 is configured to divide each of the EMI circuit units into sub-unit circuits according to whether each of the EMI circuit units includes a switching signal or a high-frequency signal, and each of the EMI circuit units respectively Divided into a number of EMI circuit subunits under test.
  • the first dividing module 104 performs module partitioning on the television according to whether the switching power supply circuit or the high-frequency signal circuit is included.
  • the first dividing module 104 The television set 10 is divided into the following EMI modules: a power board 11, a core board 12, and a liquid crystal display 13, that is, a power board 11, a core board 12, and a liquid crystal display 13 of the television are circuit modules capable of generating EMI radiation.
  • the power board 11, the core board 12 and the liquid crystal display 13 of the television are also referred to as the first level in the television capable of generating EMI radiation interference sources.
  • the key to dividing the level is to see if the module contains The switching power supply circuit or the high-frequency signal circuit part cannot be divided into the first level if it does not include the switching power supply circuit or the high-frequency signal circuit part.
  • the backlight module of a television has a switching current signal (a signal capable of generating EMI radiation) when working, but the backlight module of the television cannot be divided into the above first level because the backlight module of the television
  • the switch signal is provided by the power board. When the power board turns off the backlight signal, the backlight module no longer has a switch current signal.
  • the second dividing module 105 divides each of the EMI modules into circuit units according to whether each of the EMI modules contains a switching signal or a high-frequency signal, and divides each of the EMI modules into a plurality of EMIs.
  • the circuit unit divides each EMI module in the first level of the television set into a plurality of EMI circuit units according to whether each of the EMI modules operates with a switching signal or a high frequency signal.
  • the second dividing module 105 according to whether the movement board 12 (first level) of the television sets contains a switching signal or a high frequency signal, and the movement board 12 of the television set is used.
  • EMI circuit units a power amplifier circuit unit 121, a network port circuit unit 122, a tuner circuit unit 123, a decoding circuit unit 124, a SOC circuit unit 125, and a power supply circuit unit 126.
  • the power amplifier circuit unit 121, the network port circuit unit 122, the tuner circuit unit 123, the decoding circuit unit 124, the SOC circuit unit 125, and the power supply circuit unit 126 in the core board 12 are also referred to as televisions.
  • a second level of EMI radiation interference sources can be generated in the machine. The key to the division of the second level is to see whether the circuit contains a switching signal or a high-frequency signal.
  • the specific circuit structure needs to be specifically divided. For example, some SOC circuits have integrated network port circuits, then the network port circuit does not need to be divided. The second level.
  • the third dividing module 106 divides each of the EMI circuit units into sub-unit circuits according to whether each EMI circuit unit operates with a switching signal or a high-frequency signal, and divides each of the EMI circuit units For each of the EMI circuit subunits to be tested, that is, according to whether each of the EMI circuit units operates with a switching signal or a high frequency signal, each EMI circuit unit in the second level of the television set is divided into a plurality of EMI circuits to be tested. Subunit.
  • the third dividing module 106 includes a switching signal or a high value according to the SOC circuit unit 125 (second level) in the movement board 12 (first level) of the television set.
  • the frequency signal divides the SOC circuit unit 125 in the movement board 12 of the television into the following EMI circuit subunits to be tested: DDR control circuit sub-unit 1251, signal input circuit sub-unit 1252, signal output circuit sub-unit 1253, audio processing Circuit subunit 1254 and video processing circuit subunit 1255.
  • DDR control circuit sub-unit 1251, the signal input circuit sub-unit 1252, the signal output circuit sub-unit 1253, the audio processing circuit sub-unit 1254, and the video processing circuit sub-unit 1255 in the SOC circuit 125 are also referred to as televisions.
  • the third level of the machine is capable of generating sources of EMI radiation interference.
  • the third level of division is also to see whether the circuit contains a switching signal or a high frequency signal.
  • the above-mentioned division of the module level of the television set may be divided according to actual needs, and in other embodiments, it may be further divided into more levels.
  • the EMI positioning device of the television set of the present invention is described in detail by dividing the television set into the first level, the second level, and the third level (ie, three levels).
  • the EMI positioning device of the TV set of the present embodiment utilizes the powerful processing and control capability of the TV main chip SOC, and adopts a multi-level modular positioning test device to quickly locate the EMI interference source, that is, by dividing the TV into as many levels as possible.
  • the first level represents several large EMI modules of the TV set. These large EMI modules constitute the possible radiation sources in the entire TV system.
  • the second level is to subdivide the EMI modules in the first level.
  • the third level is to subdivide the EMI circuit cells in the second level into several smaller EMI circuit sub-units.
  • the EMI positioning device of the television set of the embodiment divides the module circuit of the television into the first level, the second level and the third level, and after receiving the preset EMI test command, the measured EMI of the television
  • the operating state, working module or operating frequency of the circuit subunit ie, the EMI circuit subunit in the third level above
  • the EMI detector is obtained for each EMI circuit subunit under different working states, different working modules or
  • the EMI positioning device of the television set of the embodiment adopts a multi-level modular positioning test device to achieve the purpose of quickly and accurately locating the EMI interference source, so that the EMI positioning device of the television set of the embodiment has high EMI positioning efficiency and accurate EMI positioning. At the same time, since the EMI positioning device of the television set of the embodiment greatly shortens the EMI positioning time, the labor cost is greatly reduced.
  • the control module 101 includes a UI interface calling unit 1011 and a control unit 1012. .
  • the UI interface invoking unit 1011 is configured to invoke and display a preset EMI test UI interface when receiving a preset EMI test command, where the EMI test UI interface includes each of the EMI modules of the television set, An EMI circuit unit corresponding to each of the EMI modules and a measured EMI circuit sub-unit corresponding to each EMI circuit unit; when receiving an EMI module selection command, calling and displaying each EMI corresponding to the selected EMI module a circuit unit; upon receiving an EMI circuit unit selection instruction, calling and displaying each EMI circuit subunit corresponding to the selected EMI circuit unit;
  • the control unit 1012 is configured to control an operating state, a working circuit unit, or an operating frequency of the selected EMI circuit subunit when receiving the EMI circuit subunit selection instruction.
  • the UI interface invoking unit 1011 invokes and displays the preset EMI test UI interface, and the subsequent EMI module selection instruction
  • the input of the EMI circuit unit selection command and the EMI circuit subunit selection command may be input through a corresponding button of the orientation selection button on the television remote controller and an OK confirmation button.
  • an EMI positioning test sequence for each of the EMI modules, an EMI positioning test sequence for the EMI circuit unit corresponding to each of the EMI modules, and a pair of EMI circuit units The corresponding EMI positioning test sequence of the tested EMI circuit sub-units can be blindly image-based, and the positioning is eliminated one by one.
  • the tester can also select the EMI with the highest probability of EMI interference sources based on his own industry experience.
  • the module, the EMI circuit unit, and the EMI circuit subunit under test are prioritized for EMI testing.
  • the EMI positioning device of the television set of the embodiment is described in detail by taking the EMI positioning test of the movement board of the television as an example:
  • the UI interface invoking unit 1011 calls and displays a preset EMI test UI interface when receiving the preset EMI test instruction; then, the UI interface calling unit When receiving the EMI module selection instruction (the selected test object is the movement board of the television), the 1011 calls and displays each EMI circuit unit corresponding to the selected movement board, including the power amplifier circuit unit and the network port.
  • the UI interface invoking unit 1011 receives an EMI circuit unit selection instruction (if the test object selected by the instruction is the machine) In the core board SOC circuit), calling and displaying each EMI circuit subunit corresponding to the selected SOC circuit unit, including a DDR control circuit subunit, a signal input circuit subunit, a signal output circuit subunit, an audio processing circuit subunit, and a video processing circuit subunit; then, the UI interface invoking unit 1011 receives an EMI circuit subunit selection instruction (if the test object selected by the instruction is an audio processing circuit subunit in the SOC circuit, that is, the measured EMI circuit
  • the control unit 1012 controls the operating state, the working circuit unit or the operating frequency of the selected audio processing circuit subunit, and then according to the EMI detector
  • the audio processing circuit subunit unit analyzes and determines the EMI radiation value (if the test object selected by the instruction is the machine) In the core board SOC circuit), calling and displaying each EMI circuit subunit corresponding to the selected SOC circuit unit, including a
  • the control unit 1012 controls the audio processing circuit sub-unit (ie, the EMI circuit sub-unit under test) to change from an active state to an inactive state (ie, the operating state of the audio processing circuit sub-unit has changed. And analyzing whether the EMI radiation frequency value and the EMI radiation amplitude value detected by the EMI detector are found to change when the operating state of the audio processing circuit subunit is changed, if the EMI radiation frequency value detected by the EMI detector And the EMI radiation amplitude value does not change, it can be determined that the audio processing circuit subunit is not the EMI interference source circuit subunit of the television, that is, the EMI interference source of the television is not on the audio processing circuit subunit; If after the control unit 1012 changes the operating state of the audio processing circuit subunit, if the EMI radiation frequency value detected by the EMI detector changes or the detected EMI radiation amplitude value changes, it may be determined
  • the audio processing circuit subunit is a EMI interference source circuit subunit of the television, that is, the EMI interference
  • the audio processing circuit subunit may also be determined whether the EMI interference source of the television is in the audio processing circuit. On the unit. Specifically, when the audio processing circuit subunit operates, after changing its working mode or changing its operating frequency, if the obtained radiation frequency value changes or the acquired radiation amplitude value changes, it is determined that the The audio processing circuit subunit is an EMI interference source circuit unit; when the audio processing circuit subunit operates, after changing its working mode or changing its operating frequency, if the obtained EMI radiation frequency value and the EMI radiation amplitude value do not occur If it is changed, it is judged that the audio processing circuit subunit is not an EMI interference source circuit unit.
  • the control unit 1012 controls the working state, the working circuit unit or the operating frequency of the selected EMI circuit subunit when receiving the EMI circuit subunit selection command, and then according to
  • the EMI detector analyzes whether the measured EMI circuit subunit is a TV set according to a change of the EMI radiation value detected by the EMI circuit subunit under different operating states, different working modules or different operating frequencies.
  • EMI interference source circuit subunit The EMI positioning device of the television set of this embodiment has the advantages of high EMI positioning efficiency and strong EMI positioning accuracy.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de positionnement d'interférences électromagnétiques (EMI) pour télévision. Le procédé de positionnement D'EMI pour télévision comprend les étapes suivantes: lorsqu'une instruction de test EMI prédéfinie est reçue, le contrôle de l'état de fonctionnement, du module de fonctionnement ou de la fréquence de fonctionnement de chaque sous-unité de circuit EMI testée d'une télévision; l'acquisition des valeurs de rayonnement EMI de chaque sous-unité de circuit EMI testée dans un état de fonctionnement différent, par rapport à un module de fonctionnement différent ou à une fréquence de fonctionnement différente, détectées par un détecteur EMI; les valeurs de rayonnement EMI comprenant une valeur de fréquence de rayonnement EMI et une valeur d'amplitude de rayonnement EMI; selon les valeurs de rayonnement EMI acquises, la mise en oeuvre d'une analyse pour déterminer une sous-unité de circuit source d'EMI. Le procédé de positionnement d'EMI pour télévision selon la présente invention améliore l'efficacité du positionnement des EMI et la précision du positionnement des EMI.
PCT/CN2016/113453 2016-11-07 2016-12-30 Procédé et dispositif de positionnement d'emi pour télévision WO2018082186A1 (fr)

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