WO2020113637A1 - 过电流保护方法和显示设备 - Google Patents

过电流保护方法和显示设备 Download PDF

Info

Publication number
WO2020113637A1
WO2020113637A1 PCT/CN2018/120583 CN2018120583W WO2020113637A1 WO 2020113637 A1 WO2020113637 A1 WO 2020113637A1 CN 2018120583 W CN2018120583 W CN 2018120583W WO 2020113637 A1 WO2020113637 A1 WO 2020113637A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
comparison
peak current
peak
preset
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/120583
Other languages
English (en)
French (fr)
Inventor
黄北洲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HKC Co Ltd
Original Assignee
HKC Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HKC Co Ltd filed Critical HKC Co Ltd
Publication of WO2020113637A1 publication Critical patent/WO2020113637A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current

Definitions

  • This application relates to the field of electronic technology, and more specifically to an overcurrent protection method and a display device.
  • the overcurrent protection mechanism of the display panel gate drive circuit (GOA, gate driver array) is to detect that when the input current of the level shifter becomes instantaneously large, the power of the GOA circuit is cut off, thereby protecting the display panel gate drive Circuit.
  • the detected current is compared with a fixed preset value.
  • the preset value is exceeded, the power is turned off, and when it is not exceeded, the power is not turned off.
  • due to the manufacturing process there are often differences between the same model and different pieces. In this way, when the GOA circuit works normally or is short-circuited, the current of different pieces will also be different. If they are compared with the same value, then There may be a misjudgment, the normal working GOA circuit is judged as a short circuit and the power supply is cut off, or the short circuited GOA circuit is judged as the normal operation and the power supply is not cut off for protection.
  • an overcurrent protection method and a display device are provided.
  • an overcurrent protection method includes: obtaining a peak current during normal operation of a working circuit; determining a comparison current according to the obtained peak current during normal operation and a preset lookup table; Real-time detection of the current when the working circuit is actually working; comparing the actual working current with the determined comparison current; and outputting a control signal according to the comparison result to control the on and off of the power supply for the working circuit.
  • obtaining the peak current when the working circuit works normally includes: obtaining the peak current when the working circuit works; and judging whether the obtained peak current meets the preset condition, and when the obtained peak current meets the preset condition , The peak current obtained is determined as the peak current of the working circuit during normal operation.
  • the look-up table includes a functional relationship between the peak current and the comparison current during normal operation of the working circuit, and the peak current is positively related to the comparison current; based on the obtained peak current during normal operation and the preset search The table determines the comparison current, including: determining the comparison current according to the obtained peak current during normal operation and the functional relationship.
  • the lookup table includes a plurality of preset peak currents and a plurality of comparison currents corresponding to the plurality of preset peak currents, the plurality of preset peak currents and the corresponding plurality of comparison currents Positive correlation; determine the comparison current according to the obtained peak current during normal operation and a preset look-up table, including: determining the correspondence between the obtained peak current during normal operation and multiple preset peak currents; and according to the correspondence Determine the comparison current.
  • the comparison current is determined according to the obtained peak current during normal operation and a preset look-up table, including: Determine the correspondence between the peak current Ipeak during normal operation and N preset peak currents; when Ipeak ⁇ Peak1, determine the comparison current as OCP1; when PeakM-1 ⁇ Ipeak ⁇ PeakM, determine the comparison current as OCPM, where M is an integer greater than 1 and less than or equal to N; and when Ipeak>PeakN, the comparison current is determined as OCPN.
  • detecting the current when the working circuit is actually working in real time includes: detecting the average current when the working circuit is working in real time.
  • a control signal is output according to the comparison result to control the on and off of the power supply for the working circuit, including: when the current in actual operation is greater than the determined comparison current, the control signal is output to turn off Power supply for working circuit.
  • the working circuit is a gate driving circuit of the display panel.
  • an overcurrent protection method includes: acquiring a peak current during normal operation of a working circuit; determining a correspondence between the obtained peak current during normal operation and a plurality of preset peak currents Relationship; according to the corresponding relationship, one of the multiple preset comparison currents is determined as the comparison current corresponding to the peak current during normal operation, and the multiple preset comparison currents correspond to the multiple preset peak currents; Real-time detection of the actual working current of the working circuit; comparing the actual working current with the determined current corresponding to the peak current during normal operation; and when the actual working current is greater than the determined and normal working current When the peak current corresponds to the comparison current, a control signal is output to disconnect the power supply for the working circuit.
  • obtaining the peak current when the working circuit works normally includes: obtaining the peak current when the working circuit works; and judging whether the obtained peak current meets the preset condition, and when the obtained peak current meets the preset condition , The peak current obtained is determined as the peak current of the working circuit during normal operation.
  • detecting the current when the working circuit is actually working in real time includes: detecting the average current when the working circuit is working in real time.
  • the corresponding relationship of the peak current includes: determining the corresponding relationship between the peak current Ipeak obtained during normal operation and N peak currents; according to the corresponding relationship, one of the plurality of preset comparison currents is determined as the peak value during normal operation
  • the comparison current corresponding to the current includes: when Ipeak ⁇ Peak1, the comparison current is determined as OCP1; when PeakM-1 ⁇ Ipeak ⁇ PeakM, the comparison current is determined as OCPM, where M is greater than 1 and less than or equal to N Integer; and when Ipeak>Pe
  • the working circuit includes a gate driving circuit of the display panel.
  • a display device including: an overcurrent protection device, the overcurrent protection device including a processor and a memory, the processor for executing a computer program stored in the memory to achieve the following Steps: Obtain the peak current of the working circuit during normal operation; determine the comparison current according to the obtained peak current during normal operation and a preset look-up table; obtain the current of the working circuit during actual operation in real time; The determined comparison current is compared; and a control signal is output according to the comparison result to control the on and off of the power supply for the working circuit.
  • the working circuit includes a gate driving circuit of the display device.
  • obtaining the peak current when the working circuit works normally includes: obtaining the peak current when the working circuit works; and judging whether the obtained peak current meets the preset condition, and when the obtained peak current meets the preset condition , The peak current obtained is determined as the peak current of the working circuit during normal operation.
  • the look-up table includes a functional relationship between the peak current and the comparison current during normal operation of the working circuit, and the peak current is positively related to the comparison current; based on the obtained peak current during normal operation and the preset search The table determines the comparison current, including: determining the comparison current according to the obtained peak current during normal operation and the functional relationship.
  • the lookup table includes a plurality of preset peak currents and a plurality of comparison currents corresponding to the plurality of preset peak currents, the plurality of preset peak currents and the corresponding plurality of comparison currents Positive correlation; determine the comparison current according to the obtained peak current during normal operation and a preset look-up table, including: determining the correspondence between the obtained peak current during normal operation and multiple preset peak currents; and according to the correspondence Determine the comparison current.
  • the comparison current is determined according to the obtained peak current during normal operation and a preset look-up table, including: Determine the correspondence between the peak current Ipeak during normal operation and N preset peak currents; when Ipeak ⁇ Peak1, determine the comparison current as OCP1; when PeakM-1 ⁇ Ipeak ⁇ PeakM, determine the comparison current as OCPM, where M is an integer greater than 1 and less than or equal to N; and when Ipeak>PeakN, the comparison current is determined as OCPN.
  • a control signal is output according to the comparison result to control the on and off of the power supply for the working circuit, including: when the current in actual operation is greater than the determined comparison current, the control signal is output to turn off Power supply for working circuit.
  • FIG. 1 shows a flowchart of an overcurrent protection method in an embodiment of the present application.
  • FIG. 2 shows a flowchart of step S110 of the method shown in FIG. 1.
  • FIG. 3 shows a schematic circuit diagram of step S120 of implementing the method shown in FIG. 1 in an embodiment of the present application.
  • FIG. 4 shows a flowchart of an overcurrent protection method in an embodiment of the present application.
  • An embodiment of the present application provides an overcurrent protection method. As shown in FIG. 1, the method may include the following steps:
  • Step S110 Obtain the peak current when the working circuit works normally.
  • the working circuit in this embodiment is a gate driving circuit of a display panel, but the application is not limited thereto. Because of the manufacturing process, there are often differences between the same model and different slices, so that when the gate drive circuit is working normally or short-circuited, the current of different slices will also be different. Therefore, it is necessary to obtain the peak current during the normal operation of the gate drive circuit.
  • the peak current of the gate drive circuit during normal operation can be obtained by the current detector.
  • Step S120 Determine the comparison current according to the obtained peak current during normal operation and a preset look-up table.
  • the lookup table contains the corresponding relationship between the peak current and the comparison current, and the comparison current can be determined according to the obtained peak current during normal operation and the preset lookup table.
  • the comparison current is the threshold current. When the actual current of the working circuit is greater than the comparison current, the overcurrent protection is started.
  • step S130 the current when the working circuit is actually working is detected in real time.
  • the current when the gate driving circuit actually works can be detected in real time by the current detector.
  • step S140 the current during actual operation is compared with the determined comparison current.
  • the actual working current detected in real time is compared with the determined comparison current.
  • step S150 a control signal is output according to the comparison result to control the on and off of the power supply for the working circuit.
  • a control signal is output according to the comparison result to control the on and off of the power supply for the gate driving circuit, thereby performing overcurrent protection.
  • the comparison current is determined according to the obtained peak current during normal operation of the working circuit and a preset look-up table, and the actual working current detected in real time is compared with the comparison current to determine the working circuit Whether short-circuited or not, different comparison currents can be set for different working circuits, which can improve the accuracy of judgment and better protect the working circuit.
  • step S110 acquiring the peak current when the working circuit works normally, includes:
  • Step S111 Obtain the peak current when the working circuit operates.
  • the peak current when the working circuit is operating is detected.
  • step S112 it is determined whether the obtained peak current satisfies the preset condition. If yes, step S113 is executed, otherwise step S111 is executed.
  • step S113 the obtained peak current is determined as the peak current when the working circuit operates normally.
  • the preset condition is that the peak current of the working circuit working under multiple sets of control signals is equal. By comparing the peak current when working under multiple sets of control signals to determine whether it is the working current during normal operation, if the current is basically the same, the working circuit is considered to be working normally, and the measured peak current is determined to be normal working Peak current. If the obtained peak current does not satisfy the preset condition, the peak current is re-acquired until the peak current when the working circuit works normally.
  • the overcurrent protection method in the above embodiment determines whether the acquired current is the current during normal operation by judging whether the measured current satisfies the preset condition, so as to obtain an accurate peak current during normal operation, so in step S120
  • the determined comparison current is more accurate, which makes the overcurrent protection more accurate and reduces the probability of misjudgment.
  • the look-up table includes a function relationship between the peak current and the comparison current during normal operation of the working circuit, and the peak current is positively related to the comparison current.
  • Step S120 Determine the comparison current according to the obtained peak current during normal operation and a preset lookup table, including: determining the comparison current according to the obtained peak current during normal operation and a functional relationship.
  • the look-up table includes the functional relationship between the peak current and the comparison current during normal operation of the working circuit. Input a peak current to output a corresponding comparison current.
  • the peak current is positively related to the comparison current, that is, The greater the peak current, the greater the comparison current.
  • Step S120 Determine the comparison current according to the obtained peak current during normal operation and a preset lookup table, including: determining the comparison current according to the obtained peak current during normal operation and a functional relationship.
  • the lookup table includes a plurality of preset peak currents and a plurality of comparison currents corresponding to the plurality of preset peak currents, a plurality of preset peak currents and a plurality of comparison currents corresponding thereto Positive correlation.
  • Step S120 determining the comparison current according to the obtained peak current during normal operation and a preset lookup table, including: determining a correspondence between the obtained peak current during normal operation and a plurality of preset peak currents; and according to the correspondence Determine the comparison current.
  • the comparison current when Ipeak ⁇ Peak1, the comparison current is determined as OCP1; when PeakM-1 ⁇ Ipeak ⁇ PeakM, the comparison current is determined as OCPM, where M is an integer greater than 1 and less than or equal to N; when Ipeak> At PeakN, the comparison current is determined as OCPN.
  • the comparison current is determined as OCP2; when Peak2 ⁇ Ipeak ⁇ Peak3, the comparison current is determined as OCP3;...
  • PeakN-1 ⁇ Ipeak ⁇ PeakN the comparison current is determined Determined as OCPN. Where N is an integer greater than 1.
  • the value of N can be determined according to the actual situation.
  • the peak current is related to the load of the gate drive circuit. The larger the load, the greater the peak current.
  • the comparison current can be determined according to the current during normal operation and the abnormal current immediately after a short circuit.
  • FIG. 3 a circuit schematic diagram of step S120 of implementing the method shown in FIG. 1 in an embodiment of the present application is shown. Specifically, first convert the obtained current to a voltage, that is, connect a resistor in series on the line that detects the current, then the voltage on the resistor is the peak voltage after the peak current is converted, and the peak voltage is applied to multiple transistors (in the The gates of the three transistors Q1, Q2, Q3) are schematically shown in FIG. 3, the trigger voltage is applied to the source stages of the multiple transistors, and the drains of the multiple transistors are connected to the look-up table module. Multiple transistors have different threshold voltages.
  • a voltage that is, connect a resistor in series on the line that detects the current
  • the voltage on the resistor is the peak voltage after the peak current is converted
  • the peak voltage is applied to multiple transistors (in the The gates of the three transistors Q1, Q2, Q3) are schematically shown in FIG. 3, the trigger voltage is applied to the source stages of the multiple transistors, and the drains
  • the overcurrent protection method in the above embodiment by setting multiple peak current thresholds and multiple comparison currents corresponding to the peak current threshold in the lookup table, the corresponding comparison currents can be determined according to the obtained peak currents, which can improve Accuracy of over-current judgment.
  • step S130: detecting the current when the working circuit is actually working in real time includes: detecting the average current when the working circuit is working in real time.
  • the operating current detected in step S130 is an average current within one cycle.
  • the comparison current in the look-up table is determined based on the average current during operation and the abnormal current immediately after a short circuit.
  • the overcurrent protection method in the above embodiment detects the average current during actual operation of the working circuit, and compares the average current with the comparison current to determine whether to disconnect the power supply. By detecting the average current, the probability of misjudgment can be reduced .
  • outputting a control signal according to the comparison result to control the on and off of the power supply for the working circuit includes: when the current in actual operation is greater than the determined comparison current, outputting the control signal to turn off Power supply for working circuit.
  • a control signal is output to disconnect the power supply for the working circuit, thereby achieving overcurrent protection; when the actual operation current is less than or equal to the determined ratio For current, the working circuit works normally.
  • This embodiment also provides an overcurrent protection method. As shown in FIG. 4, the method includes the following steps:
  • Step S210 Obtain the peak current when the working circuit works normally
  • Step S220 Determine the correspondence between the obtained peak current during normal operation and multiple preset peak currents
  • Step S230 Determine one of the plurality of preset comparison currents as the comparison current corresponding to the peak current during normal operation according to the correspondence, and the plurality of preset comparison currents correspond to the plurality of preset peak currents ;
  • Step S240 detecting the current when the working circuit is actually working in real time
  • Step S250 comparing the current during actual operation with the determined comparison current corresponding to the peak current during normal operation
  • Step S260 when the current during actual operation is greater than the determined comparison current corresponding to the peak current during normal operation, a control signal is output to disconnect the power supply for the working circuit.
  • one of the multiple preset comparison currents is determined to be the peak current during normal operation based on the obtained correspondence between the peak current during normal operation of the working circuit and multiple preset peak currents
  • Corresponding comparison current where multiple preset comparison currents correspond to multiple preset peak currents, and the actual working current detected in real time is compared with the comparison current to determine whether the working circuit is short-circuited, thereby Different comparison currents can be set for the working circuits of different loads, which can improve the accuracy of judgment and better protect the working circuit.
  • step S210 acquiring the peak current of the working circuit during normal operation, includes the following steps:
  • the plurality of preset peak currents include N peak currents Peak1, Peak2, Peak3...PeakN
  • Step S220, determining the corresponding relationship between the obtained peak current during normal operation and multiple preset peak currents includes: determining the corresponding relationship between the obtained peak current Ipeak during normal operation and N peak currents.
  • Step S230 Determine one of the multiple preset comparison currents as the comparison current corresponding to the peak current during normal operation according to the correspondence, including: when Ipeak ⁇ Peak1, determine the comparison current as OCP1; When PeakM-1 ⁇ Ipeak ⁇ PeakM, determine the comparison current as OCPM, where M is an integer greater than 1 and less than or equal to N; and when Ipeak>PeakN, determine the comparison current as OCPN.
  • step S240, detecting the current when the working circuit is actually working in real time includes: detecting the average current when the working circuit is working in real time.
  • the working circuit includes a gate driving circuit of the display panel.
  • FIG. 1, FIG. 2 and FIG. 4 are displayed in order according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps is not strictly limited in order, and they can be executed in other orders. Moreover, at least a part of the steps in FIGS. 1, 2 and 4 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but may be executed at different times. The execution order is not necessarily sequential, but may be executed in turn or alternately with at least a part of other steps or sub-steps or stages of other steps.
  • An embodiment of the present application further provides a display device including an overcurrent protection device.
  • the overcurrent protection device includes a processor and a memory.
  • the processor is used to execute a computer program stored in the memory to implement the following steps: obtain a working circuit Peak current during normal operation; determine the comparison current based on the obtained peak current during normal operation and a preset look-up table; obtain the current during actual operation of the working circuit in real time; compare the current during actual operation with the determined comparison current Compare; and output a control signal according to the comparison result to control the on and off of the power supply for the working circuit.
  • obtaining the peak current when the working circuit works normally includes: obtaining the peak current when the working circuit is working; and judging whether the obtained peak current meets the preset condition, and when the obtained peak current meets the preset condition, The obtained peak current is determined as the peak current of the working circuit during normal operation.
  • the look-up table includes the functional relationship between the peak current and the comparison current during normal operation of the working circuit, and the peak current is positively related to the comparison current; based on the obtained peak current during normal operation and the preset look-up table Determining the comparison current includes: determining the comparison current according to the obtained peak current during normal operation and the functional relationship.
  • the look-up table includes a plurality of preset peak currents and a plurality of comparison currents corresponding to the plurality of preset peak currents, the plurality of preset peak currents and the corresponding plurality of comparison currents are positive Correlation; determine the comparison current according to the obtained peak current during normal operation and a preset look-up table, including: determining the correspondence between the obtained peak current during normal operation and multiple preset peak currents; and determining according to the correspondence Compare current.
  • the comparison current is determined according to the obtained peak current during normal operation and a preset look-up table, including: determination Correspondence between peak current Ipeak during normal operation and N preset peak currents; when Ipeak ⁇ Peak1, the comparison current is determined as OCP1; when PeakM-1 ⁇ Ipeak ⁇ PeakM, the comparison current is determined as OCPM , Where M is an integer greater than 1 and less than or equal to N; and when Ipeak>PeakN, the comparison current is determined as OCPN.
  • outputting a control signal according to the comparison result to control the on and off of the power supply for the working circuit includes: when the current in actual operation is greater than the determined comparison current, outputting the control signal to turn off Power supply for working circuit.
  • the working circuit includes a gate driving circuit of the display device.
  • the display device includes a liquid crystal display.
  • the overcurrent protection device is provided on the driving circuit board of the liquid crystal display.
  • the display device includes an OLED (Organic Light-Emitting Diode) display.
  • OLED Organic Light-Emitting Diode

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

一种过电流保护方法和显示设备。其中过电流保护方法包括：获取工作电路正常工作时的峰值电流（S110）；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流（S120）；实时检测工作电路实际工作时的电流（S130）；将实际工作时的电流与经确定的比对电流进行比较（S140）；以及根据比较结果输出控制信号，以控制为工作电路供电的电源的通断（S150）。

Description

过电流保护方法和显示设备
本申请要求于2018年12月3日提交中国专利局、申请号为CN201811465480.3、申请名称为“过电流保护方法和显示设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子技术领域，更具体地涉及过电流保护方法和显示设备。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
目前，显示面板栅极驱动电路(GOA，gate driver on array)的过电流保护机制是侦测电平转换器的输入电流瞬间变大时，即将GOA电路的电源切断，从而保护显示面板栅极驱动电路。
但是，在这种方式中，侦测到的电流是与固定的预设值做比对，超过预设值时则切断电源，未超过时则不切断电源。但是因为制程原因，同一个机种、不同片之间往往是有差异的，这样GOA电路正常工作或短路时，不同片的电流也会不一样，如果都是与同一个值做比对，就可能存在误判，将正常工作的GOA电路判定为短路而切断电源，或是将短路的GOA电路判定为正常工作而没有切断电源进行保护。
申请内容
根据本申请的各种实施例，提供一种过电流保护方法和显示设备。
根据本申请的一个方面，提供了一种过电流保护方法，该方法包括： 获取工作电路正常工作时的峰值电流；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流；实时检测工作电路实际工作时的电流；将实际工作时的电流与经确定的比对电流进行比较；以及根据比较结果输出控制信号，以控制为工作电路供电的电源的通断。
在其中一个实施例中，获取工作电路正常工作时的峰值电流，包括：获取工作电路工作时的峰值电流；以及判断获得的峰值电流是否满足预设条件，当获得的峰值电流满足预设条件时，将获得的峰值电流确定为工作电路正常工作时的峰值电流。
在其中一个实施例中，查找表中包括工作电路正常工作时的峰值电流与比对电流的函数关系，峰值电流与比对电流正相关；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：根据获得的正常工作时的峰值电流和函数关系确定比对电流。
在其中一个实施例中，查找表中包括多个预设的峰值电流以及与多个预设的峰值电流对应的多个比对电流，多个预设的峰值电流与对应的多个比对电流正相关；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：确定获得的正常工作时的峰值电流与多个预设的峰值电流的对应关系；以及根据对应关系确定比对电流。
在其中一个实施例中，查找表中包括N个峰值电流Peak1,Peak2,Peak3…PeakN和与之对应的N个比对电流OCP1,OCP2,OCP3……OCPN，其中，PeakN>PeakN-1>……>Peak2>Peak1，OCPN>OCPN-1>……>OCP2>OCP1，其中，N为大于1的整数；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：确定正常工作时的峰值电流Ipeak与N个预设的峰值电流的对应关系；当Ipeak≤Peak1时，将比对电流确定为OCP1；当PeakM-1<Ipeak≤PeakM时，将比对电流确定为OCPM，其中M为大于1且小于等于N的整数；以及当Ipeak>PeakN时，将比对电流确定为OCPN。
在其中一个实施例中，实时检测工作电路实际工作时的电流，包括： 实时检测工作电路工作时的平均电流。
在其中一个实施例中，根据比较结果输出控制信号，以控制为工作电路供电的电源的通断，包括：当实际工作时的电流大于经确定的比对电流时，输出控制信号，以断开为工作电路供电的电源。
在其中一个实施例中，工作电路是显示面板的栅极驱动电路。
根据本申请的另一个方面，提供了一种过电流保护方法，该方法包括：获取工作电路正常工作时的峰值电流；确定获得的正常工作时的峰值电流与多个预设的峰值电流的对应关系；根据对应关系将多个预设的比对电流中的一个确定为与正常工作时的峰值电流对应的比对电流，多个预设的比对电流与多个预设的峰值电流对应；实时检测工作电路实际工作时的电流；将实际工作时的电流与经确定的与正常工作时的峰值电流对应的比对电流进行比较；以及当实际工作时的电流大于经确定的与正常工作时的峰值电流对应的比对电流时，输出控制信号，以断开为工作电路供电的电源。
在其中一个实施例中，获取工作电路正常工作时的峰值电流，包括：获取工作电路工作时的峰值电流；以及判断获得的峰值电流是否满足预设条件，当获得的峰值电流满足预设条件时，将获得的峰值电流确定为工作电路正常工作时的峰值电流。
在其中一个实施例中，实时检测工作电路实际工作时的电流，包括：实时检测工作电路工作时的平均电流。
在其中一个实施例中，多个预设的峰值电流包括N个峰值电流Peak1,Peak2,Peak3…PeakN，多个预设的比对电流包括N个比对电流OCP1,OCP2,OCP3……OCPN，其中，PeakN>PeakN-1>……>Peak2>Peak1，OCPN>OCPN-1>……>OCP2>OCP1，N为大于1的整数；确定获得的正常工作时的峰值电流与多个预设的峰值电流的对应关系，包括：确定获得的正常工作时的峰值电流Ipeak与N个峰值电流的对应关系；根据对应关系将多个预设的比对电流中的一个确定为与正常工作时的峰值电流对应的比对电 流，包括：当Ipeak≤Peak1时，将比对电流确定为OCP1；当PeakM-1<Ipeak≤PeakM时，将比对电流确定为OCPM，其中M为大于1且小于等于N的整数；以及当Ipeak>PeakN时，将比对电流确定为OCPN。
在其中一个实施例中，工作电路包括显示面板的栅极驱动电路。
根据本申请的又一个方面，提供了一种显示设备，该显示设备包括：过电流保护装置，该过电流保护装置包括处理器和存储器，处理器用于执行存储在存储器中的计算机程序以实现以下步骤：获取工作电路正常工作时的峰值电流；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流；实时获取工作电路实际工作时的电流；将实际工作时的电流与经确定的比对电流进行比较；以及根据比较结果输出控制信号，以控制为工作电路供电的电源的通断。
在其中一个实施例中，工作电路包括显示设备的栅极驱动电路。
在其中一个实施例中，获取工作电路正常工作时的峰值电流，包括：获取工作电路工作时的峰值电流；以及判断获得的峰值电流是否满足预设条件，当获得的峰值电流满足预设条件时，将获得的峰值电流确定为工作电路正常工作时的峰值电流。
在其中一个实施例中，查找表中包括工作电路正常工作时的峰值电流与比对电流的函数关系，峰值电流与比对电流正相关；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：根据获得的正常工作时的峰值电流和函数关系确定比对电流。
在其中一个实施例中，查找表中包括多个预设的峰值电流以及与多个预设的峰值电流对应的多个比对电流，多个预设的峰值电流与对应的多个比对电流正相关；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：确定获得的正常工作时的峰值电流与多个预设的峰值电流的对应关系；以及根据对应关系确定比对电流。
在其中一个实施例中，查找表中包括N个峰值电流Peak1,Peak2, Peak3…PeakN和与之对应的N个比对电流OCP1,OCP2,OCP3……OCPN，其中，PeakN>PeakN-1>……>Peak2>Peak1，OCPN>OCPN-1>……>OCP2>OCP1，其中，N为大于1的整数；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：确定正常工作时的峰值电流Ipeak与N个预设的峰值电流的对应关系；当Ipeak≤Peak1时，将比对电流确定为OCP1；当PeakM-1<Ipeak≤PeakM时，将比对电流确定为OCPM，其中M为大于1且小于等于N的整数；以及当Ipeak>PeakN时，将比对电流确定为OCPN。
在其中一个实施例中，根据比较结果输出控制信号，以控制为工作电路供电的电源的通断，包括：当实际工作时的电流大于经确定的比对电流时，输出控制信号，以断开为工作电路供电的电源。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其他特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些申请的实施例或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的申请、目前描述的实施例或示例以及目前理解的这些申请的最佳模式中的任何一者的范围的限制。
图1示出了本申请的一个实施例中过电流保护方法的流程图。
图2示出了图1所示的方法的步骤S110的流程图。
图3示出了本申请的一个实施例中实现图1所示的方法的步骤S120的电路示意图。
图4示出了本申请的一个实施例中过电流保护方法的流程图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图 及实施例，对本申请进行进一步详细说明。应当理解，此处描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。以上实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
本申请实施例提供了一种过电流保护方法，如图1所示，该方法可以包括如下步骤：
步骤S110，获取工作电路正常工作时的峰值电流。
示例性地，本实施例中的工作电路为显示面板的栅极驱动电路，但本申请不限于此。因为制程原因，同一个机种、不同片之间往往是有差异的，这样栅极驱动电路电路正常工作或短路时，不同片的电流也会不一样。因此，需要获取栅极驱动电路正常工作时的峰值电流。可以通过电流检测器获取栅极驱动电路正常工作时的峰值电流。
步骤S120，根据获得的正常工作时的峰值电流和预设的查找表确定比对电流。
具体地，查找表中包含峰值电流与比对电流的对应关系，根据获得的正常工作时的峰值电流和预设的查找表就可以确定比对电流。比对电流即为阈值电流，当工作电路的实际工作时的电流大于比对电流时，启动过电流保护。
步骤S130，实时检测工作电路实际工作时的电流。
具体地，可以通过电流检测器实时检测栅极驱动电路实际工作时的电流。
步骤S140，将实际工作时的电流与经确定的比对电流进行比较。
具体地，将实时检测到的实际工作时的电流与确定的比对电流进行比较。
步骤S150，根据比较结果输出控制信号，以控制为工作电路供电的电源的通断。
具体地，根据比较结果输出控制信号，以控制为栅极驱动电路供电的电源的通断，从而进行过电流保护。
上述过电流保护方法，通过根据获得的工作电路正常工作时的峰值电流和预设的查找表确定比对电流，并将实时检测到的实际工作的电流与该比对电流进行比较来判断工作电路是否短路，可以为不同的工作电路设置不同的比对电流，从而可以提高判断的准确性，更好地保护工作电路。
在一个实施例中，如图2所示，步骤S110，获取工作电路正常工作时的峰值电流，包括：
步骤S111，获取工作电路工作时的峰值电流。
具体地，检测工作电路工作时的峰值电流。
步骤S112，判断获得的峰值电流是否满足预设条件，若是，则执行步骤S113，否则执行步骤S111。
步骤S113，将获得的峰值电流确定为工作电路正常工作时的峰值电流。
具体地，检测到工作电路的峰值电流后，需要判断该峰值电流是否为该工作电路正常工作时的工作电流。因此，需要判断获得的峰值电流是否满足预设条件。在一个实施例中，预设条件为：工作电路在多组控制信号下工作时的峰值电流相等。通过比较在多组控制信号下工作时的峰值电流来确定是否为正常工作时的工作电流，若电流基本一致，则认为该工作电路是正常工作的，并且将测得的峰值电流确定为正常工作时的峰值电流。若获得的峰值电流不满足预设条件，则重新获取峰值电流，直到获取工作电路正常工作时的峰值电流。
上述实施例中的过电流保护方法，通过判断测得的电流是否满足预设条件来判断获取的电流是否为正常工作时的电流，从而获得准确的正常工作时的峰值电流，因而在步骤S120中确定的比对电流更加准确，从而使得过电流保护更准确，减小发生误判的几率。
在一个实施例中，查找表中包括工作电路正常工作时的峰值电流与比对电流的函数关系，峰值电流与比对电流正相关。步骤S120，根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：根据获得的正常工作时的峰值电流和函数关系确定比对电流。
具体地，查找表中包括工作电路正常工作时的峰值电流与比对电流的函数关系，输入一个峰值电流，即可输出一个与之对应的比对电流，峰值电流与比对电流正相关，即峰值电流越大，比对电流越大。步骤S120，根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：根据获得的正常工作时的峰值电流和函数关系确定比对电流。
在一个实施例中，查找表中包括多个预设的峰值电流以及与多个预设的峰值电流对应的多个比对电流，多个预设的峰值电流和与其对应的多个比对电流正相关。步骤S120，根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：确定获得的正常工作时的峰值电流与多个预设的峰值电流的对应关系；以及根据对应关系确定比对电流。
在一个实施例中，，查找表中包括N个峰值电流Peak1,Peak2,Peak3……PeakN，(PeakN>PeakN-1>……>Peak2>Peak1)和与之对应的N个比对电流OCP1,OCP2,OCP3……OCPN(OCPN>OCPN-1>……>OCP2>OCP1)，然后确定步骤S110中获得的工作电路正常工作时的电流Ipeak与N个峰值电流的对应关系，再根据对应关系确定比对电流。具体地，当Ipeak≤Peak1时，将比对电流确定为OCP1；当PeakM-1<Ipeak≤PeakM时，将比对电流确定为OCPM，其中M为大于1且小于等于N的整数；当Ipeak>PeakN时，将比对电流确定为OCPN。例如，当Peak1<Ipeak≤Peak2时，将比对电流 确定为OCP2；当Peak2<Ipeak≤Peak3时，将比对电流确定为OCP3；……当PeakN-1<Ipeak≤PeakN时，将比对电流确定为OCPN。其中N为大于1的整数。可以根据实际情况确定N的值。峰值电流与栅极驱动电路的负载有关，负载越大，峰值电流越大。比对电流可以根据正常工作时的电流和刚短路时的异常电流确定。
在一个实施例中，如图3所示，示出了本申请的一个实施例中实现图1所示的方法的步骤S120的电路示意图。具体地，首先将获得的电流转换为电压，即在检测电流的线路上串联一电阻，则该电阻上的电压为峰值电流转化后的峰值电压，将该峰值电压分别施加到多个晶体管(在图3中示意性地示出了3个晶体管Q1、Q2、Q3)的栅极，将触动电压施加到多个晶体管的源级，并且该多个晶体管的漏极连接到查找表模块。多个晶体管的阈值电压不同。在图3中，U1(Q1的阈值电压)>U2(Q2的阈值电压)>U3(Q3的阈值电压)，多个阈值电压与多个峰值电流对应，即与多个比对电流对应。当检测到的峰值电流转换后的电压能导通哪个晶体管，则代表应该启动该晶体管对应峰值电流匹配的比对电流。例如，当检测到的电压U>U1时，Q1、Q2、Q3均导通，优先取与Q1对应的比对电流；当检测到的电压U在U1和U2之间时，Q2、Q3均导通，优先取与Q2对应的比对电流；以此类推。
上述实施例中的过电流保护方法，通过在查找表中设置多个峰值电流阈值以及与峰值电流阈值对应的多个比对电流，可以根据获得的峰值电流确定对应的比对电流，从而能够提高过流判断的准确率。
在一个实施例中，步骤S130，实时检测工作电路实际工作时的电流，包括：实时检测工作电路工作时的平均电流。
具体地，步骤S130中检测到的工作电流为一个周期内的平均电流。查找表中的比对电流是根据工作时的平均电流和刚短路时的异常电流来确定的。
上述实施例中的过电流保护方法，检测工作电路实际动作时的平均电流，并将该平均电流与比对电流进行比较来判断是否要断开电源，通过检测平均电流，可以降低误判的几率。
在一个实施例中，根据比较结果输出控制信号，以控制为工作电路供电的电源的通断，包括：当实际工作时的电流大于经确定的比对电流时，输出控制信号，以断开为工作电路供电的电源。
具体地，当实际工作时的电流大于经确定的比对电流时，输出控制信号，以断开为工作电路供电的电源，从而实现过电流保护；当实际工作时的电流小于等于经确定的比对电流时，所述工作电路正常工作。
本实施例还提供了一种过电流保护方法，如图4所示，该方法包括以下步骤：
步骤S210，获取工作电路正常工作时的峰值电流；
步骤S220，确定获得的正常工作时的峰值电流与多个预设的峰值电流的对应关系；
步骤S230，根据对应关系将多个预设的比对电流中的一个确定为与正常工作时的峰值电流对应的比对电流，多个预设的比对电流与多个预设的峰值电流对应；
步骤S240，实时检测工作电路实际工作时的电流；
步骤S250，将实际工作时的电流与经确定的与正常工作时的峰值电流对应的比对电流进行比较；以及
步骤S260，当实际工作时的电流大于经确定的与正常工作时的峰值电流对应的比对电流时，输出控制信号，以断开为工作电路供电的电源。
上述过电流保护方法，通过根据获得的工作电路正常工作时的峰值电流和多个预设的峰值电流的对应关系将多个预设的比对电流中的一个确定为与正常工作时的峰值电流对应的比对电流，其中多个预设的比对电流与多个预设的峰值电流对应，并将实时检测到的实际工作的电流与该比对电 流进行比较来判断工作电路是否短路，从而可以为不同负载的工作电路设置不同的比对电流，进而可以提高判断的准确性，更好地保护工作电路。
在一个实施例中，步骤S210，获取工作电路正常工作时的峰值电流，包括以下步骤：
获取工作电路工作时的峰值电流；以及
判断获得的峰值电流是否满足预设条件，当获得的峰值电流满足预设条件时，将获得的峰值电流确定为工作电路正常工作时的峰值电流。
在一个实施例中，多个预设的峰值电流包括N个峰值电流Peak1,Peak2,Peak3…PeakN，多个预设的比对电流包括N个比对电流OCP1,OCP2,OCP3……OCPN，其中，PeakN>PeakN-1>……>Peak2>Peak1，OCPN>OCPN-1>……>OCP2>OCP1，N为大于1的整数。步骤S220，确定获得的正常工作时的峰值电流与多个预设的峰值电流的对应关系，包括：确定获得的正常工作时的峰值电流Ipeak与N个峰值电流的对应关系。步骤S230，根据对应关系将多个预设的比对电流中的一个确定为与正常工作时的峰值电流对应的比对电流，包括：当Ipeak≤Peak1时，将比对电流确定为OCP1；当PeakM-1<Ipeak≤PeakM时，将比对电流确定为OCPM，其中M为大于1且小于等于N的整数；以及当Ipeak>PeakN时，将比对电流确定为OCPN。
在一个实施例中，步骤S240，实时检测工作电路实际工作时的电流，包括：实时检测工作电路工作时的平均电流。
在一个实施例中，工作电路包括显示面板的栅极驱动电路。
应该理解的是，虽然图1、图2和图4的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，其可以以其他的顺序执行。而且，图1、图2和图4中的至少一部分步骤可以包括多个子步骤或者多个阶段，这些子步骤或者阶段并不必然是在同 一时刻执行完成，而是可以在不同的时刻执行，其执行顺序也不必然是依次进行，而是可以与其他步骤或者其他步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
本申请实施例还提供了一种显示设备，该显示设备包括过电流保护装置，过电流保护装置包括处理器和存储器，处理器用于执行存储在存储器中的计算机程序以实现以下步骤：获取工作电路正常工作时的峰值电流；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流；实时获取工作电路实际工作时的电流；将实际工作时的电流与经确定的比对电流进行比较；以及根据比较结果输出控制信号，以控制为工作电路供电的电源的通断。
在一个实施例中，获取工作电路正常工作时的峰值电流，包括：获取工作电路工作时的峰值电流；以及判断获得的峰值电流是否满足预设条件，当获得的峰值电流满足预设条件时，将获得的峰值电流确定为工作电路正常工作时的峰值电流。
在一个实施例中，查找表中包括工作电路正常工作时的峰值电流与比对电流的函数关系，峰值电流与比对电流正相关；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：根据获得的正常工作时的峰值电流和函数关系确定比对电流。
在一个实施例中，查找表中包括多个预设的峰值电流以及与多个预设的峰值电流对应的多个比对电流，多个预设的峰值电流与对应的多个比对电流正相关；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：确定获得的正常工作时的峰值电流与多个预设的峰值电流的对应关系；以及根据对应关系确定比对电流。
在一个实施例中，查找表中包括N个峰值电流Peak1,Peak2,Peak3…PeakN和与之对应的N个比对电流OCP1,OCP2,OCP3……OCPN，其中，PeakN>PeakN-1>……>Peak2>Peak1，OCPN>OCPN-1>……>OCP2>OCP1，其中， N为大于1的整数；根据获得的正常工作时的峰值电流和预设的查找表确定比对电流，包括：确定正常工作时的峰值电流Ipeak与N个预设的峰值电流的对应关系；当Ipeak≤Peak1时，将比对电流确定为OCP1；当PeakM-1<Ipeak≤PeakM时，将比对电流确定为OCPM，其中M为大于1且小于等于N的整数；以及当Ipeak>PeakN时，将比对电流确定为OCPN。
在一个实施例中，根据比较结果输出控制信号，以控制为工作电路供电的电源的通断，包括：当实际工作时的电流大于经确定的比对电流时，输出控制信号，以断开为工作电路供电的电源。
在一个实施例中，工作电路包括显示设备的栅极驱动电路。
在一个实施例中，该显示设备包括液晶显示器。过电流保护装置设置在液晶显示器的驱动电路板上。
在另一个实施例中，该显示设备包括OLED(Organic Light-Emitting Diode，有机发光二极管)显示器。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种过电流保护方法，所述方法包括：
    获取工作电路正常工作时的峰值电流；
    根据获得的所述正常工作时的峰值电流和预设的查找表确定比对电流；
    实时检测所述工作电路实际工作时的电流；
    将所述实际工作时的电流与经确定的所述比对电流进行比较；以及
    根据比较结果输出控制信号，以控制为所述工作电路供电的电源的通断。
  2. 根据权利要求1所述的过电流保护方法，其中，所述获取工作电路正常工作时的峰值电流，包括：
    获取工作电路工作时的峰值电流；以及
    判断获得的所述峰值电流是否满足预设条件，当获得的所述峰值电流满足预设条件时，将获得的所述峰值电流确定为所述工作电路正常工作时的峰值电流。
  3. 根据权利要求1所述的过电流保护方法，其中，所述查找表中包括工作电路正常工作时的峰值电流与比对电流的函数关系，所述峰值电流与所述比对电流正相关；
    所述根据获得的所述正常工作时的峰值电流和预设的查找表确定比对电流，包括：
    根据获得的所述正常工作时的峰值电流和所述函数关系确定所述比对电流。
  4. 根据权利要求1所述的过电流保护方法，其中，所述查找表中包括多个预设的峰值电流以及与所述多个预设的峰值电流对应的多个比对电流，所述多个预设的峰值电流与对应的所述多个比对电流正相关；
    所述根据获得的所述正常工作时的峰值电流和预设的查找表确定比对 电流，包括：
    确定获得的所述正常工作时的峰值电流与所述多个预设的峰值电流的对应关系；以及
    根据所述对应关系确定所述比对电流。
  5. 根据权利要求1所述的过电流保护方法，其中，所述查找表中包括N个峰值电流Peak1,Peak2,Peak3…PeakN和与之对应的N个比对电流OCP1,OCP2,OCP3……OCPN，其中，PeakN>PeakN-1>……>Peak2>Peak1，OCPN>OCPN-1>……>OCP2>OCP1，其中，N为大于1的整数；
    所述根据获得的所述正常工作时的峰值电流和预设的查找表确定比对电流，包括：
    确定所述正常工作时的峰值电流Ipeak与所述N个预设的峰值电流的对应关系；
    当Ipeak≤Peak1时，将所述比对电流确定为OCP1；
    当PeakM-1<Ipeak≤PeakM时，将所述比对电流确定为OCPM，其中M为大于1且小于等于N的整数；以及
    当Ipeak>PeakN时，将所述比对电流确定为OCPN。
  6. 根据权利要求1所述的过电流保护方法，其中，所述实时检测所述工作电路实际工作时的电流，包括：
    实时检测所述工作电路工作时的平均电流。
  7. 根据权利要求1所述的过电流保护方法，其中，所述根据比较结果输出控制信号，以控制为所述工作电路供电的电源的通断，包括：
    当所述实际工作时的电流大于经确定的所述比对电流时，输出控制信号，以断开为所述工作电路供电的电源。
  8. 根据权利要求1所述的过电流保护方法，其中，所述工作电路是显示面板的栅极驱动电路。
  9. 一种过电流保护方法，所述方法包括：
    获取工作电路正常工作时的峰值电流；
    确定获得的所述正常工作时的峰值电流与多个预设的峰值电流的对应关系；
    根据所述对应关系将多个预设的比对电流中的一个确定为与所述正常工作时的峰值电流对应的比对电流，所述多个预设的比对电流与所述多个预设的峰值电流对应；
    实时检测所述工作电路实际工作时的电流；
    将所述实际工作时的电流与经确定的与所述正常工作时的峰值电流对应的所述比对电流进行比较；以及
    当所述实际工作时的电流大于经确定的与所述正常工作时的峰值电流对应的所述比对电流时，输出控制信号，以断开为所述工作电路供电的电源。
  10. 根据权利要求9所述的过电流保护方法，其中，所述获取工作电路正常工作时的峰值电流，包括：
    获取工作电路工作时的峰值电流；以及
    判断获得的所述峰值电流是否满足预设条件，当获得的所述峰值电流满足预设条件时，将获得的所述峰值电流确定为所述工作电路正常工作时的峰值电流。
  11. 根据权利要求9所述的过电流保护方法，其中，所述实时检测所述工作电路实际工作时的电流，包括：
    实时检测所述工作电路工作时的平均电流。
  12. 根据权利要求9所述的过电流保护方法，其中，所述多个预设的峰值电流包括N个峰值电流Peak1,Peak2,Peak3…PeakN，所述多个预设的比对电流包括N个比对电流OCP1,OCP2,OCP3……OCPN，其中，PeakN>PeakN-1>……>Peak2>Peak1，OCPN>OCPN-1>……>OCP2>OCP1，N为大于1的整数；
    所述确定获得的所述正常工作时的峰值电流与多个预设的峰值电流的对应关系，包括：
    确定获得的所述正常工作时的峰值电流Ipeak与所述N个峰值电流的对应关系；
    所述根据所述对应关系将多个预设的比对电流中的一个确定为与所述正常工作时的峰值电流对应的比对电流，包括：
    当Ipeak≤Peak1时，将所述比对电流确定为OCP1；
    当PeakM-1<Ipeak≤PeakM时，将所述比对电流确定为OCPM，其中M为大于1且小于等于N的整数；以及
    当Ipeak>PeakN时，将所述比对电流确定为OCPN。
  13. 根据权利要求9所述的过电流保护方法，其中，所述工作电路包括显示面板的栅极驱动电路。
  14. 一种显示设备，包括过电流保护装置，所述过电流保护装置包括处理器和存储器，所述处理器用于执行存储在所述存储器中的计算机程序以实现以下步骤：
    获取工作电路正常工作时的峰值电流；
    根据获得的所述正常工作时的峰值电流和预设的查找表确定比对电流；
    实时获取所述工作电路实际工作时的电流；
    将所述实际工作时的电流与经确定的所述比对电流进行比较；以及
    根据比较结果输出控制信号，以控制为所述工作电路供电的电源的通断。
  15. 根据权利要求14所述的显示设备，其中，所述工作电路包括所述显示设备的栅极驱动电路。
  16. 根据权利要求14所述的显示设备，其中，所述获取工作电路正常工作时的峰值电流，包括：
    获取工作电路工作时的峰值电流；以及
    判断获得的所述峰值电流是否满足预设条件，当获得的所述峰值电流满足预设条件时，将获得的所述峰值电流确定为所述工作电路正常工作时的峰值电流。
  17. 根据权利要求14所述的显示设备，其中，所述查找表中包括工作电路正常工作时的峰值电流与比对电流的函数关系，所述峰值电流与所述比对电流正相关；
    所述根据获得的所述正常工作时的峰值电流和预设的查找表确定比对电流，包括：
    根据获得的所述正常工作时的峰值电流和所述函数关系确定所述比对电流。
  18. 根据权利要求14所述的显示设备，其中，所述查找表中包括多个预设的峰值电流以及与所述多个预设的峰值电流对应的多个比对电流，所述多个预设的峰值电流与对应的所述多个比对电流正相关；
    所述根据获得的所述正常工作时的峰值电流和预设的查找表确定比对电流，包括：
    确定获得的所述正常工作时的峰值电流与所述多个预设的峰值电流的对应关系；以及
    根据所述对应关系确定所述比对电流。
  19. 根据权利要求14所述的显示设备，其中，所述查找表中包括N个峰值电流Peak1,Peak2,Peak3…PeakN和与之对应的N个比对电流OCP1,OCP2,OCP3……OCPN，其中，PeakN>PeakN-1>……>Peak2>Peak1，OCPN>OCPN-1>……>OCP2>OCP1，其中，N为大于1的整数；
    所述根据获得的所述正常工作时的峰值电流和预设的查找表确定比对电流，包括：
    确定所述正常工作时的峰值电流Ipeak与所述N个预设的峰值电流的 对应关系；
    当Ipeak≤Peak1时，将所述比对电流确定为OCP1；
    当PeakM-1<Ipeak≤PeakM时，将所述比对电流确定为OCPM，其中M为大于1且小于等于N的整数；以及
    当Ipeak>PeakN时，将所述比对电流确定为OCPN。
  20. 根据权利要求14所述的显示设备，其中，所述根据比较结果输出控制信号，以控制为所述工作电路供电的电源的通断，包括：
    当所述实际工作时的电流大于经确定的所述比对电流时，输出控制信号，以断开为所述工作电路供电的电源。
PCT/CN2018/120583 2018-12-03 2018-12-12 过电流保护方法和显示设备 Ceased WO2020113637A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811465480.3A CN109449877B (zh) 2018-12-03 2018-12-03 过电流保护方法和显示设备
CN201811465480.3 2018-12-03

Publications (1)

Publication Number Publication Date
WO2020113637A1 true WO2020113637A1 (zh) 2020-06-11

Family

ID=65554702

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/120583 Ceased WO2020113637A1 (zh) 2018-12-03 2018-12-12 过电流保护方法和显示设备

Country Status (2)

Country Link
CN (1) CN109449877B (zh)
WO (1) WO2020113637A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115166344A (zh) * 2022-06-13 2022-10-11 牧原食品股份有限公司 用于电流检测电路的方法、电路、设备及可读存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101452049A (zh) * 2008-12-22 2009-06-10 华为技术有限公司 电路故障检测的方法、装置及单板
US20130070379A1 (en) * 2011-09-21 2013-03-21 Richtek Technology Corporation, R.O.C. Power regulator with over current protection and control circuit thereof and method of over current protection
CN104700811A (zh) * 2015-03-27 2015-06-10 友达光电股份有限公司 一种驱动控制电路及其 goa 电路的过流保护方法
CN106297702A (zh) * 2016-08-31 2017-01-04 深圳市华星光电技术有限公司 液晶显示装置及其过流保护电路
CN107294053A (zh) * 2017-07-31 2017-10-24 武汉华星光电技术有限公司 过流保护电路及曝光机台

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103259245B (zh) * 2012-02-17 2015-10-28 台达电子工业股份有限公司 电子装置的保护电路及保护方法
EP2712084B1 (en) * 2012-09-20 2019-11-06 Infineon Technologies AG Semiconductor device including short-circuit protection with a variable threshold
CN103199506B (zh) * 2013-04-12 2015-07-15 深圳市华星光电技术有限公司 光源驱动模组的过流保护电路及背光模组
CN103532090B (zh) * 2013-10-30 2016-02-17 沈阳君威新能科技有限公司 多级在线可调过流保护模块
US9667060B1 (en) * 2014-11-04 2017-05-30 Google Inc. Adjusting over current protection values during changes in load current
WO2016135815A1 (ja) * 2015-02-23 2016-09-01 新電元工業株式会社 負荷駆動回路、および、負荷短絡検出回路
CN206595695U (zh) * 2016-12-20 2017-10-27 乐视汽车（北京）有限公司 过流保护装置和系统
CN108647045B (zh) * 2018-03-20 2021-10-01 科大讯飞股份有限公司 激活函数的实现方法及装置、存储介质、电子设备
CN108550350B (zh) * 2018-04-18 2020-09-01 深圳市华星光电技术有限公司 液晶显示面板的过电流保护系统及过电流保护方法
CN108879594B (zh) * 2018-08-14 2020-07-24 苏州浪潮智能科技有限公司 一种服务器及其pol的过电流保护电路

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101452049A (zh) * 2008-12-22 2009-06-10 华为技术有限公司 电路故障检测的方法、装置及单板
US20130070379A1 (en) * 2011-09-21 2013-03-21 Richtek Technology Corporation, R.O.C. Power regulator with over current protection and control circuit thereof and method of over current protection
CN104700811A (zh) * 2015-03-27 2015-06-10 友达光电股份有限公司 一种驱动控制电路及其 goa 电路的过流保护方法
CN106297702A (zh) * 2016-08-31 2017-01-04 深圳市华星光电技术有限公司 液晶显示装置及其过流保护电路
CN107294053A (zh) * 2017-07-31 2017-10-24 武汉华星光电技术有限公司 过流保护电路及曝光机台

Also Published As

Publication number Publication date
CN109449877A (zh) 2019-03-08
CN109449877B (zh) 2020-05-12

Similar Documents

Publication Publication Date Title
US20090284301A1 (en) Key press detecting circuit
US7961446B2 (en) Temperature protection circuit, power supply, and electronic device
US7586345B2 (en) Over-voltage protection circuit and method thereof
JP6394704B2 (ja) 半導体装置
US20210148969A1 (en) Chip abnormality detecting circuit and chip abnormality detecting device
US9083181B2 (en) Over-current protection circuit for light source driving module and related backlight module
US20080258927A1 (en) Monitoring device for motherboard voltage
US20210382803A1 (en) Method for regulating chip temperature
US20220247164A1 (en) Over-current protection circuit, driving method for over-current protection circuit and display device
US11398722B2 (en) Overcurrent protection method, display panel and display device
US9831816B2 (en) Semiconductor power module and drive system for electric motor
CN217445021U (zh) 短路开机保护电路、电源电路和电子设备
EP0680146A2 (en) Power element driving circuit
US11201615B2 (en) Control circuit and power module
WO2020113637A1 (zh) 过电流保护方法和显示设备
US20190096305A1 (en) Level shift circuit, control method thereof, display device and drive circuit thereof
US20140097686A1 (en) Low/high voltage selector
CN108922471B (zh) 一种电平转换电路及其工作方法、显示装置
US9537300B2 (en) Load driving device
US20080246519A1 (en) Gate drive circuit
US8786195B2 (en) Automatic method to detect short and open conditions on the outputs of a LED driver device
CN116435956A (zh) 功率半导体器件过电流保护的自适应退饱和检测方法和栅极驱动器
US20100164559A1 (en) Power-on circuit
TWI717965B (zh) 面板模組、顯示驅動積體電路以及其之異常電壓的重新啓動方法
US6137190A (en) Method and system for providing coordinated turn on of paralleled power supplies

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18942090

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 30/09/2021)

122 Ep: pct application non-entry in european phase

Ref document number: 18942090

Country of ref document: EP

Kind code of ref document: A1