WO2019218477A1 - 保护电路以及显示面板 - Google Patents

保护电路以及显示面板 Download PDF

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Publication number
WO2019218477A1
WO2019218477A1 PCT/CN2018/097480 CN2018097480W WO2019218477A1 WO 2019218477 A1 WO2019218477 A1 WO 2019218477A1 CN 2018097480 W CN2018097480 W CN 2018097480W WO 2019218477 A1 WO2019218477 A1 WO 2019218477A1
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WIPO (PCT)
Prior art keywords
output
voltage
circuit
protection circuit
power supply
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Ceased
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PCT/CN2018/097480
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English (en)
French (fr)
Inventor
文炆
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US16/163,568 priority Critical patent/US10778004B2/en
Publication of WO2019218477A1 publication Critical patent/WO2019218477A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/02Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Definitions

  • the present application relates to the field of display technology, and in particular to a protection circuit and a display panel.
  • the OLED panel is a self-luminous organic electroluminescence photodiode, which does not require a backlight, has high contrast, thin thickness, wide viewing angle and fast response speed, and can be used for a flexible panel, and has a wide temperature range and structure.
  • the superior performance of the process is considered to be the next generation of flat panel display emerging application technology.
  • the OLED panel has so many advantages, the lifetime of the OLED panel is shorter than that of the LCD panel because the OLED panel is a current-driven self-luminous body.
  • the material and component life requirements are relatively high for the power supply. However, there are certain fluctuations in the grid voltage, which may cause instability or even overvoltage of the power supply. Therefore, it is necessary to protect the OLED panel circuit, especially the OLED panel.
  • the power supply performs precise and rapid overvoltage protection, and the stability of the power supply is preserved to better protect the display panel.
  • the present application provides a protection circuit and a display panel, which can solve the problem of voltage regulation protection of the input voltage of the display panel.
  • a technical solution adopted by the present application is to provide a protection circuit including a power supply circuit for outputting a first voltage;
  • the power supply circuit includes a transformer including an input end and an output end, the input end Connecting a power frequency power supply for transforming the power frequency power supply;
  • the rectifier includes a first input end, a second input end, a first output end, and a second output end, the first input end and the first a second input terminal is connected to the output end of the transformer for converting a voltage outputted by the transformer into a DC voltage;
  • a filter circuit comprising an input end and an output end, wherein the input end is connected to the first output end of the rectifier And the second output end is configured to filter the DC voltage;
  • the overvoltage protection circuit is connected to the power supply circuit for feedback adjusting the first voltage, so that the output of the overvoltage protection circuit is a protection voltage is maintained in a preset range;
  • the overvoltage protection circuit includes: a first operational amplifier circuit connected to an output end of the
  • a protection circuit including a power supply circuit for outputting a first voltage, an overvoltage protection circuit, and the power supply circuit for feedback adjustment
  • the first voltage is such that the first protection voltage output by the overvoltage protection circuit is maintained at a preset range; and the regulated output circuit is connected to the overvoltage protection circuit for outputting the second protection voltage.
  • the protection circuit includes the protection circuit including: a power supply circuit for outputting a first voltage; an overvoltage protection circuit connected to the power supply circuit for feedback adjusting the first voltage, so that the overvoltage protection circuit The output first protection voltage is maintained in a preset range; a regulated output circuit is connected to the overvoltage protection circuit for regulating the output of the second protection voltage.
  • the utility model has the beneficial effects of providing a protection circuit and a display panel, and adjusting the voltage by setting an overvoltage protection circuit, so that the voltage is always stable within a preset range, and outputting through the regulated output circuit to provide a display panel
  • the purpose of stabilizing the voltage is to achieve accuracy and rapidity of the overvoltage protection of the display panel.
  • FIG. 1 is a schematic structural view of a first embodiment of a protection circuit of the present application
  • FIG. 2 is a schematic structural diagram of a circuit of a second embodiment of the protection circuit of the present application.
  • FIG 3 is a schematic structural view of an embodiment of a display panel of the present application.
  • FIG. 1 is a schematic structural diagram of an embodiment of a protection circuit of the present application.
  • the protection circuit 10 includes a power supply circuit 11, an overvoltage protection circuit 12, and a regulated output circuit 13.
  • the power circuit 11 is used for external power frequency voltage and outputs a first voltage.
  • the overvoltage protection circuit 12 is connected to the power supply circuit and configured to perform feedback adjustment on the first voltage so that the outputted first protection voltage is maintained within a predetermined range.
  • the regulated output circuit 13 is connected to the overvoltage protection circuit for stabilizing the first protection voltage and outputting the second protection voltage.
  • FIG. 2 is a schematic diagram of a circuit structure of an embodiment of a protection circuit of a display panel of the present application.
  • the power supply circuit 11 further includes a transformer T1, a rectifier D1, and a filter circuit 113.
  • the transformer T1 includes an input terminal a and an output terminal d.
  • the input terminal a of the transformer T1 is a high voltage coil terminal, and the output terminal d of the transformer T1 is a low voltage coil terminal.
  • the input terminal a is used for connecting the power frequency voltage, and the power frequency voltage is generally 220V AC voltage.
  • the output terminal d outputs the required AC voltage, which may specifically be the working voltage of the display panel. Limited, generally 5V, can also be 10V and so on.
  • the rectifier D1 is configured to convert the AC voltage outputted by the transformer T1 into a DC voltage output.
  • the rectifier D1 in the present application may be a rectifier bridge, and the rectifier bridge specifically includes a first input end f, a second input end g, and a first The output terminal h and the second output terminal i, wherein the first input terminal f and the second input terminal g are respectively connected to the output terminal d of the transformer T1, and the first output terminal h and the second output terminal i are connected to the filter circuit 113.
  • the filter circuit 113 is configured to filter the voltage output by the rectifier D1.
  • the voltage output by the rectifier D1 may have a certain high frequency noise, which may affect the operation of the display panel, so the output voltage is required. Filtering is performed to remove high frequency clutter.
  • the filter circuit 113 includes an input terminal j and an output terminal k.
  • the filter circuit 113 can be composed of a fourth resistor R4 and a first capacitor C1.
  • the fourth resistor R4 includes a first end m and a second end n. The first end m is connected to the rectifier D1, and the second end n is connected to the input end of the overvoltage protection circuit 12.
  • the first capacitor C1 includes a first end o and a second end p. The first end o is grounded, and the second end p is connected to the second end n of the fourth resistor R4.
  • the overvoltage protection circuit 12 includes a first operational amplifier circuit 121 and a second operational amplifier circuit 122.
  • the first operational amplifier circuit 121 is connected to the output end of the power supply circuit 11, that is, for receiving the first voltage, and the first voltage is amplified, and the first operational amplifier circuit 121 further includes the first operational amplifier A1.
  • a first resistor R1 wherein the first op amp A1 includes a forward input terminal q, an inverting input terminal r, and an output terminal Vout, and the forward input terminal q is used to connect the output end of the power supply circuit 11, and the reverse input
  • the terminal r is used for grounding
  • the first resistor R1 includes a first end 1 connected to the output end of the power supply circuit 11 and a second end 2 connected to the output end Vout of the first op amp A1.
  • the second operational amplifier circuit 122 is connected to the first operational amplifier circuit 121 for feeding back the first voltage amplified by the first operational amplifier circuit 121, so that the first protection voltage output by the first operational amplifier circuit 121 is in advance.
  • the second operational amplifier circuit 122 further includes a second op amp A2, a diode VD1, and a second resistor R2, wherein the second op amp A2 includes a forward input terminal q1, an inverting input terminal r1, and an output terminal.
  • the positive input terminal q1 is connected to the output terminal Vout of the first op amp A1
  • the inverting input terminal r1 is electrically grounded through the first Zener diode DZ1
  • the inverting input terminal r1 is also passed through the third resistor R3 and the power supply. 1224 is connected
  • the diode VD1 includes a first end 3 and a second end 4, the first end 3 is connected to the input end q of the first op amp A1, and the second end 4 is connected to the output end Vout1 of the second op amp A2, and
  • the current direction of the diode VD1 flows from the second end 4 to the first end 3.
  • the second resistor R2 includes a first end 5 and a second end 6.
  • the first end 5 is connected to the output end Vout1 of the second op amp A2.
  • the two ends 6 are connected to the inverting input r1 of the second op amp A2.
  • the regulated output circuit 13 includes a transistor VT1, a second capacitor C2, and a fifth resistor R5.
  • the transistor 131 includes a collector c, a base b, and an emitter e.
  • the collector c is connected to an output end of the overvoltage protection circuit 12, and the base b is electrically connected to the second Zener diode DZ2.
  • the fifth resistor R5 includes a first end 7 and a second end 8, the first end 7 of which is connected to the collector c of the transistor VT1, the second end 8 is connected to the base b of the transistor VT1, and the second capacitor C2 also includes the first The terminal s and the second terminal t have a first end s connected to the emitter e of the transistor 131 and a second end t grounded.
  • the principle of the entire protection circuit is as follows:
  • the power circuit 11 is configured to output a stable low-frequency low-voltage DC voltage. Specifically, the power frequency voltage is transformed into a low-voltage AC voltage by a transformer T1, and then converted into a DC voltage by the AC voltage through the rectifier D1. Since the voltage outputted by the rectifier D1 may have a certain high-frequency clutter, it will affect the operation of the display panel, so the output voltage needs to be filtered to remove the high-frequency clutter, so the de-high-frequency processing is performed by the filter circuit 113. Therefore, the first voltage is obtained. In this embodiment, only a circuit for providing a low-frequency low-voltage DC voltage is provided. In other embodiments, other power supply circuits may be used, which are not limited herein.
  • the output voltage of the power supply circuit 11 may be too high, so protection is required, which is specifically divided into the following two cases:
  • the first op amp A1 is amplified to input the first protection voltage and flows into the forward input end of the second op amp A2 for comparison feedback, and the second op amp A2
  • the direction input terminal is connected to the power supply through the third resistor R3, the power supply is 5V, and is electrically grounded through the first Zener diode DZ1, so that the voltage of the reverse input terminal of the second op amp A2 is stabilized at 5V, when the power circuit
  • the second op amp A2 outputs a negative voltage value, the diode VD1 is turned off, and the overvoltage protection circuit 12 is in a non-limiting state of the voltage. At this time, it is not necessary to limit the voltage outputted by the power supply circuit 11. deal with.
  • the output voltage of the power circuit 11 is greater than 5V
  • the output of the second op amp A2 is turned over, the diode VD1 is turned on to make the voltage flow to the non-inverting input end of the first op amp A1, and the overvoltage protection circuit 12 is in a voltage limiting state, thereby The output voltage of the first op amp A1 is maintained within 0-5V.
  • the voltage outputted by the power supply circuit is compared and feedback processed, so that the first voltage of the power supply voltage output is stabilized within a preset voltage range required by the display panel, and the display panel can be improved.
  • the accuracy and speed of overvoltage protection is a condition in which the voltage outputted by the power supply circuit is compared and feedback processed, so that the first voltage of the power supply voltage output is stabilized within a preset voltage range required by the display panel, and the display panel can be improved.
  • the voltage outputted by the overvoltage protection circuit 12 is transmitted to the regulated output circuit 13, and the triode clamp is used to further stabilize and remove the clutter of the input voltage, thereby The display panel provides a stable operating voltage.
  • the voltage output from the power supply circuit is compared and feedback processed by setting the overvoltage protection circuit, so that the protection voltage of the power supply voltage output is stabilized within a preset voltage range required by the display panel, thereby improving the overvoltage of the display panel.
  • the precision and speed of protection is compared and feedback processed by setting the overvoltage protection circuit, so that the protection voltage of the power supply voltage output is stabilized within a preset voltage range required by the display panel, thereby improving the overvoltage of the display panel.
  • FIG. 3 is a schematic structural diagram of a display panel according to the present application, including a display panel 20, which may be an OLED panel, connected to the protection circuit 10 of the above method, and powered by the protection circuit 10, and the specific structure of the protection circuit 10
  • a display panel 20 which may be an OLED panel
  • the present application provides a protection circuit and a display panel, and the voltage outputted by the power supply circuit is feedback-adjusted through the voltage protection circuit, so that the voltage of the power supply voltage output is stable within a preset range, and Through the output of the regulated output circuit, the purpose of providing a stable voltage to the display panel is achieved, and the accuracy and rapidity of the overvoltage protection of the display panel can be realized.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Static Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

本申请公开了保护电路以及显示面板,该保护电路包括电源电路,用于输出第一电压;过压保护电路,连接电源电路,用于反馈调节第一电压,以使得过压保护电路输出的第一保护电压维持在预设范围;稳压输出电路,连接过压保护电路,用于将第二保护电压稳压输出。通过上述实方式,本申请能够使得输出电压一直稳定在一定的预设范围下,达到给显示面板提供稳定电压的目的,实现对显示面板过压保护的精准性及快速性。

Description

保护电路以及显示面板
【技术领域】
本申请涉及显示技术领域,特别是涉及保护电路以及显示面板。
【背景技术】
目前,OLED面板是具备自发光的有机电激发光二极管,无需背光源,且对比度高、厚度薄、视角广以及反应速度快,并且可用于挠曲性面板,同时有着使用温度范围广、构造及制程较简单等优异之特性,被认为是下一代的平面显示器新兴应用技术,虽然OLED面板拥有如此多的优势,但是OLED面板的寿命比LCD面板短,因为OLED面板是电流驱动的自发光体,其材料与元件寿命对于供电电源的要求比较高,而如今电网电压存在一定的波动,使得供电电源会出现不稳定甚至过电压的现象,因此需要对OLED面板电路进行保护,尤其要对OLED面板供电电源进行精确快速的过压保护,并且要保存供电的稳定性,从而更好的保护显示面板。
【发明内容】
本申请提供保护电路以及显示面板,可以解决对显示面板的输入电压稳压保护的问题。
为解决上述问题,本申请采用的一个技术方案是:提供一种保护电路,其包括电源电路,用于输出第一电压;所述电源电路包括变压器,包括输入端和输出端,所述输入端连接工频电源,用于将所述工频电源进行变压;整流器,包括第一输入端、第二输入端、第一输出端以及第二输出端,所述第一输入端及所述第二输入端连接所述变压器的输出端,用于将所述变压器输出的电压转换为直流电压;滤波电路,包括输入端及输出端,所述输入端连接所述整流器的所述第一输出端以及所述第二输出端,用于对所述直流电压进行滤波;过压保护电路,连接所述电源电路,用于反馈调节所述第一电压,以使得所述过压保护电路输出的第一保护电压维持在预设范围;所述过压保护电路包括:第一运放电路,连接所述电源电路的输出端,用于将所述第一电压进行放大处理;第二运放电路,连接所述第一运放电路,用于将放大后的所述第一电压进行比较反馈,以使得所述第一运放电路输出的第一保护电压在预设范围;稳压输出电路,连接所述过压保护电路,用于将第二保护电压稳压输出。
为解决上述问题,本申请采用的另一个技术方案是:提供一种保护电路,其包括电源电路,用于输出第一电压;过压保护电路,连接所述电源电路,用于反馈调节所述第一电压,以使得所述过压保护电路输出的第一保护电压维持在预设范围;稳压输出电路,连接所述过压保护电路,用于将第二保护电压稳压输出。
为解决上述问题,本申请采用的另一个技术方案是:提供一种显示面板,所述显示面板连接上述方法中任一所述的保护电路,所述保护电路用于为所述显示面板供电,所述保护电路包括所述保护电路包括:电源电路,用于输出第一电压;过压保护电路,连接所述电源电路,用于反馈调节所述第一电压,以使得所述过压保护电路输出的第一保护电压维持在预设范围;稳压输出电路,连接所述过压保护电路,用于将第二保护电压稳压输出。
本申请的有益效果是:提供保护电路以及显示面板,通过设置过压保护电路对电压进行反馈调节,使得电压一直稳定在预设范围,并在通过稳压输出电路进行输出,达到给显示面板提供稳定电压的目的,实现对显示面板过压保护的精准性及快速性。
【附图说明】
图1是本申请保护电路第一实施方式的结构示意图;
图2是本申请保护电路第二实施方式的电路结构示意图;
图3是本申请显示面板的一实施方式的结构示意图。
【具体实施方式】
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本申请的一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
请参阅图1,图1是本申请保护电路一实施方式的结构示意图。如图1所示,该保护电路10包括电源电路11、过压保护电路12以及稳压输出电路13。
其中,电源电路11用于外接工频电压,并输出第一电压。
过压保护电路12,连接电源电路,并用于对第一电压进行反馈调节,使得输出后的第一保护电压维持在预设的一定范围内。
稳压输出电路13,连接过压保护电路,用于将第一保护电压进行稳定,并输出第二保护电压。
请具体参阅图2,图2是本申请显示面板的保护电路一实施方式的电路结构示意图。
如图2所示,电源电路11还包括变压器T1、整流器D1以及滤波电路113。
其中,变压器T1,包括了输入端a以及输出端d,其中,所述变压器T1的输入端a为高压线圈端,变压器T1的输出端d为低压线圈端。其中,输入端a用于连接工频电压,该工频电压一般是220V交流电压,在经过变压器T1后,输出端d输出所需要的交流电压,具体可以为显示面板的工作电压,这里不做限定,一般为5V,也可以是10V等等。
整流器D1,用于将变压器T1输出的交流电压转变为直流电压输出,本申请中的整流器D1可以为整流桥,且该整流桥具体包括了第一输入端f、第二输入端g、第一输出端h以及第二输出端i,其中,第一输入端f以及第二输入端g分别连接变压器T1的输出端d,第一输出端h以及第二输出端i连接滤波电路113。
滤波电路113,用于对所述整流器D1输出的电压进行滤波,在具体实施例中,整流器D1输出的电压可能有一定的高频杂波,会影响到显示面板的工作,所以需要对输出电压进行滤波,从而去除其高频杂波。该滤波电路113包括输入端j及输出端k。在具体实施例中,该滤波电路113可以由第四电阻R4以及第一电容C1组成。,其中,第四电阻R4包括第一端m及第二端n,第一端m连接整流器D1,第二端n连接过压保护电路12的输入端。第一电容C1包括第一端o及第二端p,第一端o接地,第二端p连接第四电阻R4的第二端n。
过压保护电路12包括第一运放电路121及第二运放电路122。
其中,第一运放电路121,连接电源电路11的输出端,也就是用于接收第一电压,并将第一电压进行放大处理,第一运放电路121进一步包括了第一运放器A1,第一电阻R1,其中,第一运放器A1包括了正向输入端q、反向输入端r以及输出端Vout,正向输入端q用于连接电源电路11的输出端,反向输入端r用于接地,第一电阻R1包括了与电源电路11的输出端连接的第一端1以及与第一运放器A1输出端Vout连接的第二端2。
第二运放电路122,连接第一运放电路121,用于将第一运放电路121所放大输出的第一电压进行反馈,从而使得第一运放电路121输出的第一保护电压在预设范围,第二运放电路122进一步包括了第二运放器A2、二极管VD1以及第二电阻R2,其中,第二运放器A2包括正向输入端q1、反向输入端r1以及输出端Vout1,正向输入端q1连接第一运放器A1的输出端Vout,反向输入端r1通过第一稳压管DZ1电性接地,且反向输入端r1还通过第三电阻R3与供电电源1224相连,二极管VD1包括了第一端3以及第二端4,第一端3连接第一运放器A1的输入端q,第二端4连接第二运放器A2的输出端Vout1,且二极管VD1的电流方向是由第二端4流向第一端3的,第二电阻R2包括第一端5及第二端6,第一端5连接第二运放器A2的输出端Vout1,第二端6连接第二运放器A2的反向输入端r1。
稳压输出电路13包括三极管VT1、第二电容C2以及第五电阻R5。
其中,三极管131包括了包括集电极c、基极b以及发射极e,所述集电极c连接所述过压保护电路12的输出端,所述基极b通过第二稳压管DZ2电性接地;第五电阻R5包括第一端7以及第二端8,其第一端7连接三极管VT1的集电极c,第二端8连接三极管VT1的基极b,第二电容C2也包括第一端s以及第二端t,其第一端s连接三极管131的发射极e,第二端t接地。
在具体实施例中,整个保护电路的原理如下:
电源电路11用于输出稳定的低频低压直流电压,具体首先通过将工频电压通过变压器T1进行变压处理,成为低压交流电压,然后在将交流电压通过整流器D1转换成直流电压。因整流器D1输出的电压可能有一定的高频杂波,会影响到显示面板的工作,所以需要对输出电压进行滤波,从而去除其高频杂波,故通过滤波电路113进行去高频处理,从而获得第一电压,本实施例只是提供了一种提供低频低压直流电压的电路,在其他实施例中,也可以采用其他的电源电路,这里不做限定。
虽然将第一电压送入过压保护电路12内,但由于工频电源存在一定的波动,从而会导致电源电路11输出电压可能过高,所以需要进行保护,具体分为如下两种情况:
1. 当第一保护电压的值小于或等于5V时
该第一电压输入至第一运放器A1后,经该第一运放器A1放大输入第一保护电压流入第二运放器A2的正向输入端进行比较反馈,第二运放器A2的方向输入端通过第三电阻R3连接供电电源,该供电电源为5V,并通过第一稳压管DZ1电性接地,使得第二运放器A2反向输入端的电压稳定在5V,当电源电路11输出电压小于或等于5V时,第二运放器A2输出负电压值,二极管VD1截止,过压保护电路12处于电压非限幅状态,此时不需要对电源电路11输出的电压进行限幅处理。
2. 当第一保护电压的值大于5V时
当电源电路11输出电压大于5V时,第二运放器A2输出翻转,二极管VD1导通使电压流向第一运放器A1的同向输入端,过压保护电路12处于电压限幅状态,从而将第一运放器A1输出电压维持在0-5V内。
本申请中,通过设置过压保护电路,对电源电路输出的电压进行比较反馈处理,从而使得电源电压输出的第一电压稳定在显示面板所需要的预设电压的范围内,可以提高对显示面板过压保护的精准性及快速性。
为了进一步使显示面板处于稳定的工作状态,将过压保护电路12输出的电压传输至到稳压输出电路13中,通过其三极管钳位使得进一步对输入的电压进行稳定与去除杂波,从而为显示面板提供稳定的工作电压。
上述实施方式,通过设置过压保护电路对电源电路输出的电压进行比较反馈处理,从而使得电源电压输出的保护电压稳定在显示面板所需要的预设电压的范围内,可以提高对显示面板过压保护的精准性及快速性。
请参见图3,图3是本申请一种显示面板的结构示意图,包括显示面板20,具体可以为OLED面板,连接上述方法的保护电路10,并通过保护电路10供电,保护电路10的具体结构以及工作原理详见上述实施例中的具体描述,此处不在赘述。
综上所述,本领域技术人员容易理解,本申请提供保护电路以及显示面板,通过压保护电路具体对电源电路输出的电压进行反馈调节,使得电源电压输出的电压稳定在预设范围下,并通过稳压输出电路进行输出,达到给显示面板提供稳定电压的目的,能够实现对显示面板过压保护的精准性及快速性。
以上所述仅为本申请的实施方式,并非因此限制本申请的专利范围,凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本申请的专利保护范围内。

Claims (20)

  1. 一种保护电路,其中,所述保护电路包括:
    电源电路,用于输出第一电压;
    所述电源电路包括变压器,包括输入端和输出端,所述输入端连接工频电源,用于将所述工频电源进行变压;
    整流器,包括第一输入端、第二输入端、第一输出端以及第二输出端,所述第一输入端及所述第二输入端连接所述变压器的输出端,用于将所述变压器输出的电压转换为直流电压;
    滤波电路,包括输入端及输出端,所述输入端连接所述整流器的所述第一输出端以及所述第二输出端,用于对所述直流电压进行滤波;
    过压保护电路,连接所述电源电路,用于反馈调节所述第一电压,以使得所述过压保护电路输出的第一保护电压维持在预设范围;
    所述过压保护电路包括:第一运放电路,连接所述电源电路的输出端,用于将所述第一电压进行放大处理;
    第二运放电路,连接所述第一运放电路,用于将放大后的所述第一电压进行比较反馈,以使得所述第一运放电路输出的第一保护电压在预设范围;
    稳压输出电路,连接所述过压保护电路,用于将第二保护电压稳压输出。
  2. 根据权利要求1所述的保护电路,其中,所述第一运放电路包括:
    第一运放器,包括正向输入端、反向输入端以及输出端,所述正向输入端连接所述电源电路的输出端,所述反向输入端电性接地;
    第一电阻,包括第一端及第二端,所述第一端连接所述电源电路的输出端,所述第二端连接所述第一运放器的输出端。
  3. 根据权利要求2所述的保护电路,其中,所述第二运放电路包括:
    二极管,包括第一端及第二端,所述第一端连接所述第一运放器的所述正向输入端;
    第二运放器,包括正向输入端、反向输入端以及输出端,所述正向输入端连接所述第一运放器的输出端,所述输出端连接所述二极管的第二端,所述反向输入端通过第一稳压管电性接地;
    第二电阻,包括第一端及第二端,所述第一端连接所述第二运放器的输出端,所述第二端连接所述第二运放器的反向输入端;
    第三电阻,包括第一端及第二端,所述第一端连接所述第二运放器的反向输入端,所述第二端连接供电电源。
  4. 根据权利要求1所述的保护电路,其中,所述滤波电路包括:
    第四电阻,包括第一端及第二端,所述第一端连接所述整流器,所述第二端连接所述过压保护电路的输入端;
    第一电容,包括第一端及第二端,所述第一端接地,所述第二端连接所述第四电阻的第二端。
  5. 根据权利要求1所述的保护电路,其中,所述稳压输出电路包括:
    三极管,包括集电极、基极以及发射极,所述集电极连接所述过压保护电路的输出端,所述基极通过第二稳压管电性接地;
    第二电容,包括第一端以及第二端,所述第一端连接所述发射极,所述第二端接地;
    第五电阻,包括第一端以及第二端,所述第一端连接所述集电极,所述第二端连接所述基极。
  6. 根据权利要求3所述的保护电路,其中,所述供电电源的电压为5V。
  7. 根据权利要求1所述的保护电路,其中,所述第一保护电压的预设范围为0-5V。
  8. 一种保护电路,其中,所述保护电路包括:
    电源电路,用于输出第一电压;
    过压保护电路,连接所述电源电路,用于反馈调节所述第一电压,以使得所述过压保护电路输出的第一保护电压维持在预设范围;
    稳压输出电路,连接所述过压保护电路,用于将第二保护电压稳压输出。
  9. 根据权利要求8所述的保护电路,其中,所述过压保护电路包括:
    第一运放电路,连接所述电源电路的输出端,用于将所述第一电压进行放大处理;
    第二运放电路,连接所述第一运放电路,用于将放大后的所述第一电压进行比较反馈,以使得所述第一运放电路输出的第一保护电压在预设范围。
  10. 根据权利要求9所述的保护电路,其中,所述第一运放电路包括:
    第一运放器,包括正向输入端、反向输入端以及输出端,所述正向输入端连接所述电源电路的输出端,所述反向输入端电性接地;
    第一电阻,包括第一端及第二端,所述第一端连接所述电源电路的输出端,所述第二端连接所述第一运放器的输出端。
  11. 根据权利要求10所述的保护电路,其中,所述第二运放电路包括:
    二极管,包括第一端及第二端,所述第一端连接所述第一运放器的所述正向输入端;
    第二运放器,包括正向输入端、反向输入端以及输出端,所述正向输入端连接所述第一运放器的输出端,所述输出端连接所述二极管的第二端,所述反向输入端通过第一稳压管电性接地;
    第二电阻,包括第一端及第二端,所述第一端连接所述第二运放器的输出端,所述第二端连接所述第二运放器的反向输入端;
    第三电阻,包括第一端及第二端,所述第一端连接所述第二运放器的反向输入端,所述第二端连接供电电源。
  12. 根据权利要求9所述的保护电路,其中,所述电源电路包括:
    变压器,包括输入端和输出端,所述输入端连接工频电源,用于将所述工频电源进行变压;
    整流器,包括第一输入端、第二输入端、第一输出端以及第二输出端,所述第一输入端及所述第二输入端连接所述变压器的输出端,用于将所述变压器输出的电压转换为直流电压;
    滤波电路,包括输入端及输出端,所述输入端连接所述整流器的所述第一输出端以及所述第二输出端,用于对所述直流电压进行滤波。
  13. 根据权利要求12所述的保护电路,其中,所述滤波电路包括:
    第四电阻,包括第一端及第二端,所述第一端连接所述整流器,所述第二端连接所述过压保护电路的输入端;
    第一电容,包括第一端及第二端,所述第一端接地,所述第二端连接所述第四电阻的第二端。
  14. 根据权利要求9所述的保护电路,其中,所述稳压输出电路包括:
    三极管,包括集电极、基极以及发射极,所述集电极连接所述过压保护电路的输出端,所述基极通过第二稳压管电性接地;
    第二电容,包括第一端以及第二端,所述第一端连接所述发射极,所述第二端接地;
    第五电阻,包括第一端以及第二端,所述第一端连接所述集电极,所述第二端连接所述基极。
  15. 根据权利要求11所述的保护电路,其中,所述供电电源的电压为5V。
  16. 根据权利要求9所述的保护电路,其中,所述第一保护电压的预设范围为0-5V。
  17. 一种显示面板,其中,所述显示面板连接保护电路,所述保护电路用于为所述显示面板供电,其中,所述保护电路包括:
    电源电路,用于输出第一电压;
    过压保护电路,连接所述电源电路,用于反馈调节所述第一电压,以使得所述过压保护电路输出的第一保护电压维持在预设范围;
    稳压输出电路,连接所述过压保护电路,用于将第二保护电压稳压输出。
  18. 根据权利要求17所述的显示面板,其中,所述过压保护电路包括:
    第一运放电路,连接所述电源电路的输出端,用于将所述第一电压进行放大处理;
    第二运放电路,连接所述第一运放电路,用于将放大后的所述第一电压进行比较反馈,以使得所述第一运放电路输出的第一保护电压在预设范围。
  19. 根据权利要求18所述的显示面板,其中,所述第一运放电路包括:
    第一运放器,包括正向输入端、反向输入端以及输出端,所述正向输入端连接所述电源电路的输出端,所述反向输入端电性接地;
    第一电阻,包括第一端及第二端,所述第一端连接所述电源电路的输出端,所述第二端连接所述第一运放器的输出端。
  20. 根据权利要求19所述的显示面板,其中,所述第二运放电路包括:
    二极管,包括第一端及第二端,所述第一端连接所述第一运放器的所述正向输入端;
    第二运放器,包括正向输入端、反向输入端以及输出端,所述正向输入端连接所述第一运放器的输出端,所述输出端连接所述二极管的第二端,所述反向输入端通过第一稳压管电性接地;
    第二电阻,包括第一端及第二端,所述第一端连接所述第二运放器的输出端,所述第二端连接所述第二运放器的反向输入端;
    第三电阻,包括第一端及第二端,所述第一端连接所述第二运放器的反向输入端,所述第二端连接供电电源。
PCT/CN2018/097480 2018-05-14 2018-07-27 保护电路以及显示面板 Ceased WO2019218477A1 (zh)

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