CN111413818B - A liquid crystal display module resistant to electrical interference - Google Patents
A liquid crystal display module resistant to electrical interference Download PDFInfo
- Publication number
- CN111413818B CN111413818B CN202010241677.XA CN202010241677A CN111413818B CN 111413818 B CN111413818 B CN 111413818B CN 202010241677 A CN202010241677 A CN 202010241677A CN 111413818 B CN111413818 B CN 111413818B
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- crystal display
- display module
- parallel
- static electricity
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
- G02F1/136295—Materials; Compositions; Manufacture processes
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/22—Antistatic materials or arrangements
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
本发明公开了一种抵抗电性干扰的液晶显示模组，包括两层ITO面玻璃基板，所述面玻璃基板表面设置导电材料，所述导电材料与地线导通；所述液晶显示模组的电源线和地线之间并联接入TVS管阵列和滤波装置。加入TVS管阵列是为了处理静电导入线路中的情况，当静电从液晶显示模组端口导入时，会侵入设备电路，产生较高的静电尖峰，造成线路器件损坏，加入TVS管阵列后，静电尖峰流过TVS时，会形成瞬间对地放电，能有效地将静电尖峰钳位在需求电压，避免静电流入后置电路，损坏器件，本发明能够有效消除如EFT、ESD的电性干扰。
The invention discloses a liquid crystal display module that resists electrical interference, comprising two layers of ITO surface glass substrates, and conductive materials are arranged on the surface of the surface glass substrates, and the conductive materials are connected to the ground wire; the liquid crystal display module The TVS tube array and filter device are connected in parallel between the power line and the ground line. The TVS tube array is added to deal with the situation where static electricity is introduced into the circuit. When static electricity is introduced from the liquid crystal display module port, it will intrude into the equipment circuit, resulting in high static electricity spikes and damage to circuit components. After adding the TVS tube array, the static electricity spikes When flowing through the TVS, an instantaneous discharge to the ground will be formed, which can effectively clamp the electrostatic spike at the required voltage, and prevent static electricity from flowing into the rear circuit and damaging the device. The present invention can effectively eliminate electrical interference such as EFT and ESD.
Description
Technical Field
The invention relates to a liquid crystal display module, in particular to a liquid crystal display module resisting electric interference.
Background
Liquid crystal display modules are becoming more and more popular in today's society and are used in various fields: as an important part of human-computer interaction, the performance of products is more and more required, and the safety of the products is the most important factor while providing convenience for the life of people in various industries such as airplanes, automobiles, industrial control, consumer goods and the like. As factors such as human body static electricity, equipment static electricity, air static electricity and the like which may appear everywhere in production and life, the performance of the product can be influenced at any time, the liquid crystal display is not displayed or is disordered, and even the liquid crystal display can be damaged in serious conditions, so that certain trouble or wrong judgment is caused to an operator, the performance of the whole product is influenced, and even larger potential safety hazards are caused. Therefore, the issue of electrostatic interference must be addressed, electrostatic discharge (ESD) and electrical fast transient burst (EFT) interference being the two most common types of electrostatic interference.
The electric fast transient pulse burst (EFT) interference is generated when an inductive load is disconnected in a circuit, and the electric fast transient pulse burst (EFT) interference is generated due to unstable equipment power supply, shaking of a switching device and change of a surrounding electromagnetic field, so that the display of the liquid crystal display is disordered or has no display, even the damage of electronic devices in the liquid crystal display causes potential safety hazards, so the design of resisting the electric fast transient pulse burst (EFT) interference is also important, and the stability of a liquid crystal display product can be improved.
The impact of electrical fast transient fast pulse trains (EFTs) on equipment is of three kinds: the first is to enter the device power supply directly through the power line, resulting in excessive noise voltage on the power line of the circuit; the second is that interference energy radiates to the space in the process of conducting on the power line, and the radiation energy induces adjacent signals to form interference; and the third is that the interference pulse signal directly enters the equipment circuit through the signal wire, so that interference is generated on the circuit.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention is directed to a liquid crystal display module capable of resisting electrical interference, which can effectively clamp the electrostatic voltage spike below the required voltage, and prevent the damage of the device caused by the electrostatic inflow in the post-circuit of the liquid crystal display module.
In order to achieve the purpose, the invention adopts the following technical scheme:
a liquid crystal display module resisting electrical interference comprises two layers of ITO (indium tin oxide) surface glass substrates, wherein conductive materials are arranged on the surfaces of the surface glass substrates and are conducted with a ground wire; and a TVS tube array and a filter device are added among a power line, a signal line and a ground line of the liquid crystal display module.
Further, the filtering device is a common-mode inductor and a differential-mode capacitor, and the common-mode inductor and the differential-mode capacitor are respectively connected in parallel between the power line and the ground line.
Furthermore, ferrite beads are added to the signal transmission line of the liquid crystal display module.
Further, the conductive material is an iron shell, the iron shell is in contact with the surface glass substrate, and the contact resistance of the iron shell and the surface glass substrate is as low as possible.
Further, the two groups of differential mode capacitors are respectively connected in parallel to two sides of the common mode inductor.
Further, a diode is connected in parallel between the power input and the ground wire, and the diode is connected in parallel to the left side of the differential mode capacitor.
Further, the TVC diode array is connected to the right side of the common mode inductor and the differential mode capacitor in parallel, the model of the TVC diode array is ESD-824015, a PIN1 PIN and a PIN6 PIN of the TVC diode array are connected in parallel between one group of signal lines, a PIN3 PIN and a PIN4 PIN are connected in parallel between the other group of signal lines, and a PIN2 PIN and a PIN5 PIN are connected in parallel between a power line and a ground line.
The invention has the beneficial effects that: the design of the invention can effectively clamp the electrostatic voltage spike below the required voltage, and prevent the damage of the device caused by the electrostatic inflow of the post circuit of the liquid crystal display module. After the iron shell is arranged on the surface glass substrate of the liquid crystal display module, the charges on the surface of the liquid crystal display module can be quickly conducted away through the iron shell and released through the power ground wire, so that the time of gathering the charges on the surface of the liquid crystal display module is shortened, and the charges can be released within 5 seconds.
The ferrite magnetic beads are added to a signal transmission line of the liquid crystal display module, and the common mode inductor or the differential mode inductor is added to a power supply input position to absorb interference of an electronic pulse group from the outside and absorb interference signals.
Drawings
FIG. 1 is a circuit diagram of a protection design of a liquid crystal module according to the present invention;
FIG. 2 is a wiring diagram of a protection design circuit of the liquid crystal module of the present invention.
FIG. 3 is a graph of static depletion after use of the present invention;
FIG. 4 is a flow diagram of static electricity in an embodiment;
FIG. 5 is a graph comparing electrostatic input and output in an embodiment.
Detailed Description
The invention will be further described with reference to the accompanying drawings and the detailed description below:
example one
As shown in fig. 1 and 2, an electric interference resistant lcd module includes two layers of ITO surface glass substrates, conductive materials are disposed on the surface of the ITO surface glass substrates, the conductive materials are conducted with a ground wire, the conductive materials are iron shells, the iron shells are in contact with the ITO surface glass substrates, and the resistance generated by the contact between the iron shells and the ITO surface glass substrates is as small as possible. The TVS diode array, the common mode inductor and the differential mode capacitor are connected in parallel between a power line and a ground line of the liquid crystal display module, and the common mode inductor and the differential mode capacitor are respectively connected in parallel between the power line and the ground line.
The static electricity discharge can generate a very high transient voltage, the speed is very high, the static electricity discharge can be completed within hundreds of millions of seconds, if the high voltage cannot be conducted away instantly, the liquid crystal display module can be damaged greatly, a TVS diode array is added among a power line, a signal line and a ground line of the liquid crystal display module, the situation can be processed when the static electricity is led into a liquid crystal display module circuit, when the static electricity is led from a power source or a signal line port of the liquid crystal display module, the liquid crystal display module circuit can be invaded by the static electricity, a higher static electricity peak is generated, devices in the liquid crystal display module circuit are damaged, after the TVS diode array is added, the static electricity peak flows through the TVS diode array, instant ground discharge can be formed, the static electricity voltage peak can be clamped below a required voltage effectively, and the damage of the device caused by the static electricity flowing into a rear circuit of the liquid crystal display, the circuit of the liquid crystal display module is designed for the existing circuit, and only a TVS diode array is added among a power line, a signal line and a ground line, wherein the model of the TVC diode array is ESD-824015.
As shown in the circuit 1 in fig. 4, when the external positive voltage electrostatic discharge enters from the S1, the external positive voltage electrostatic discharge firstly passes through the TVS diode array, and then only can flow through the PIN5 from the D1 due to the limitation of 4 unidirectional diodes in the TVS diode array, that is, the negative electrode of the TVS diode array, and then the TVS diode array between the PIN2 and the PIN5 plays a role in clamping the relative voltage between the signal and the ground wire within the specification; when the outside is negative-voltage static electricity discharged to S1, the voltage between GND and S1 is clamped at about 0.6V due to the action of D2, as shown by line 2 in fig. 4; as shown in fig. 5, when the front section has a positive voltage or a negative voltage input, a voltage clamp waveform outputted from the back end plays a role in protecting the back end circuit.
Example two
The difference from the first embodiment is that the filter device is a ferrite bead.
The surface glass substrate of the liquid crystal display module adopts the design of the existing double-layer ITO glass substrate, the iron shell is in good contact with the surface of the surface glass substrate, the iron shell is made of a better conductive material, the contact resistance generated when the iron shell is in contact with the surface glass substrate is smaller and better, then the iron shell is conducted with a power supply ground wire to form a discharge loop, after the outside discharges to the surface of the liquid crystal display module, the charges on the surface of the liquid crystal display module are converged together under normal conditions, no release way exists, so that an electric field is formed, the liquid crystal display module causes error display under the action of the electric field, after the iron shell is arranged, the charges on the surface of the liquid crystal display module can be rapidly conducted away through the iron shell, the release through the power supply ground wire is realized, the time of the charges gathered on the surface of the liquid crystal display module is shortened.
The ferrite magnetic beads are added to a signal transmission line of the liquid crystal display module, and the common mode inductor or the differential mode inductor is added to a power supply input position to absorb interference of an electronic pulse group from the outside and absorb interference signals.
The numbers in fig. 1 and 2 are the numbers of the different input and output ports, respectively.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010241677.XA CN111413818B (en) | 2020-03-31 | 2020-03-31 | A liquid crystal display module resistant to electrical interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010241677.XA CN111413818B (en) | 2020-03-31 | 2020-03-31 | A liquid crystal display module resistant to electrical interference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111413818A CN111413818A (en) | 2020-07-14 |
| CN111413818B true CN111413818B (en) | 2021-02-02 |
Family
ID=71489434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010241677.XA Active CN111413818B (en) | 2020-03-31 | 2020-03-31 | A liquid crystal display module resistant to electrical interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111413818B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112422000B (en) * | 2020-09-24 | 2022-04-01 | 智新控制系统有限公司 | Auxiliary motor controller |
| CN112596289B (en) * | 2021-01-12 | 2024-12-31 | 新阳荣乐(上海)汽车电子有限公司 | A design structure for electrostatic protection of broken code display screen |
| CN115567019B (en) * | 2022-12-06 | 2023-03-14 | 苏州浪潮智能科技有限公司 | A dual channel current sharing filter circuit |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2833655Y (en) * | 2005-11-22 | 2006-11-01 | 深圳市新深辉显示技术有限公司 | Liquid crystal display module |
| CN2833653Y (en) * | 2005-11-09 | 2006-11-01 | 深圳市新深辉显示技术有限公司 | Liquid crystal display module with electrostatic protection function |
| CN201616675U (en) * | 2009-12-31 | 2010-10-27 | 西安开容电子技术有限责任公司 | Transient prevention and stable state combined interference power supply filter |
| CN203191663U (en) * | 2013-02-26 | 2013-09-11 | 深圳市华源显示技术有限公司 | Liquid crystal module and drive signal filtering device thereof |
| CN103887965A (en) * | 2012-12-19 | 2014-06-25 | 研祥智能科技股份有限公司 | Power supply design circuit with high-level EMC and safety regulation performance |
| CN203910237U (en) * | 2014-04-23 | 2014-10-29 | 惠州中城电子科技有限公司 | Liquid crystal driving circuit for liquid crystal electric energy meter |
| CN105871352A (en) * | 2016-05-23 | 2016-08-17 | 广东美的生活电器制造有限公司 | Filter circuit, power line assembly and electric equipment |
| CN105954922A (en) * | 2016-07-13 | 2016-09-21 | 武汉华星光电技术有限公司 | Color film substrate and liquid crystal panel |
| CN207301552U (en) * | 2017-09-01 | 2018-05-01 | 东莞通华液晶有限公司 | A liquid crystal display module resistant to strong electromagnetic interference |
| KR20190020466A (en) * | 2017-08-21 | 2019-03-04 | 현대자동차주식회사 | ACTIVE EMI(Electro-Magnetic Interference) FILTER AND VEHICLE HAVING THE SAME |
| CN208580145U (en) * | 2018-07-05 | 2019-03-05 | 北京智行者科技有限公司 | Controller operating voltage management system |
| CN208707316U (en) * | 2018-08-30 | 2019-04-05 | 西华大学 | A kind of power supply line filter circuit of the anti-station GIS EMI |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7781826B2 (en) * | 2006-11-16 | 2010-08-24 | Alpha & Omega Semiconductor, Ltd. | Circuit configuration and manufacturing processes for vertical transient voltage suppressor (TVS) and EMI filter |
| CN201374641Y (en) * | 2008-12-08 | 2009-12-30 | 康佳集团股份有限公司 | Anti-electromagnetic interference circuit structure of large-screen liquid crystal television |
| CN204101857U (en) * | 2014-07-08 | 2015-01-14 | 万昌隆电子科技（深圳）有限公司 | A kind of electrostatic prevention LCD liquid crystal display module |
| CN105514963B (en) * | 2016-01-27 | 2018-06-05 | 京东方科技集团股份有限公司 | A kind of electrostatic discharge protective circuit and the liquid crystal display die set with the electrostatic discharge protective circuit |
| KR102516353B1 (en) * | 2016-12-28 | 2023-04-03 | 엘지디스플레이 주식회사 | Flexible display device method for manufacturing the same |
| US10692854B2 (en) * | 2017-03-28 | 2020-06-23 | Semtech Corporation | Method and device for electrical overstress and electrostatic discharge protection |
| CN207765096U (en) * | 2018-02-24 | 2018-08-24 | 惠科股份有限公司 | Display device |
| CN208654485U (en) * | 2018-08-27 | 2019-03-26 | 深圳秋田微电子股份有限公司 | Anti-interference liquid crystal display die set |
| TWI714995B (en) * | 2019-03-25 | 2021-01-01 | 友達光電股份有限公司 | Backlight device and display device |
| CN110346994B (en) * | 2019-07-23 | 2022-07-08 | 昆山国显光电有限公司 | Array substrate and display panel |
-
2020
- 2020-03-31 CN CN202010241677.XA patent/CN111413818B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2833653Y (en) * | 2005-11-09 | 2006-11-01 | 深圳市新深辉显示技术有限公司 | Liquid crystal display module with electrostatic protection function |
| CN2833655Y (en) * | 2005-11-22 | 2006-11-01 | 深圳市新深辉显示技术有限公司 | Liquid crystal display module |
| CN201616675U (en) * | 2009-12-31 | 2010-10-27 | 西安开容电子技术有限责任公司 | Transient prevention and stable state combined interference power supply filter |
| CN103887965A (en) * | 2012-12-19 | 2014-06-25 | 研祥智能科技股份有限公司 | Power supply design circuit with high-level EMC and safety regulation performance |
| CN203191663U (en) * | 2013-02-26 | 2013-09-11 | 深圳市华源显示技术有限公司 | Liquid crystal module and drive signal filtering device thereof |
| CN203910237U (en) * | 2014-04-23 | 2014-10-29 | 惠州中城电子科技有限公司 | Liquid crystal driving circuit for liquid crystal electric energy meter |
| CN105871352A (en) * | 2016-05-23 | 2016-08-17 | 广东美的生活电器制造有限公司 | Filter circuit, power line assembly and electric equipment |
| CN105954922A (en) * | 2016-07-13 | 2016-09-21 | 武汉华星光电技术有限公司 | Color film substrate and liquid crystal panel |
| KR20190020466A (en) * | 2017-08-21 | 2019-03-04 | 현대자동차주식회사 | ACTIVE EMI(Electro-Magnetic Interference) FILTER AND VEHICLE HAVING THE SAME |
| CN207301552U (en) * | 2017-09-01 | 2018-05-01 | 东莞通华液晶有限公司 | A liquid crystal display module resistant to strong electromagnetic interference |
| CN208580145U (en) * | 2018-07-05 | 2019-03-05 | 北京智行者科技有限公司 | Controller operating voltage management system |
| CN208707316U (en) * | 2018-08-30 | 2019-04-05 | 西华大学 | A kind of power supply line filter circuit of the anti-station GIS EMI |
Non-Patent Citations (1)
| Title |
|---|
| 电快速瞬变脉冲群干扰的综合抑制;吕攀;《电子制作》;20150327(第05(2015)期);第53-54页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111413818A (en) | 2020-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111413818B (en) | A liquid crystal display module resistant to electrical interference | |
| US8300371B2 (en) | Electrostatic discharge protection circuit and electronic device using the same | |
| CN101616536A (en) | Circuit board with electrostatic discharge protection, liquid crystal module and electronic device using same | |
| CN101893775A (en) | Electronic products with high ESD protection | |
| CN210183629U (en) | Static electricity eliminating device | |
| CN210840183U (en) | Prevent FPC board of static | |
| CN201174083Y (en) | Computer port with electrostatic protection and computer | |
| CN2703350Y (en) | A USB interface protection circuit | |
| CN109149540A (en) | A kind of esd protection circuit and electronic equipment | |
| CN219204092U (en) | Electromagnetic compatibility protection circuit of sensor | |
| CN112448377B (en) | Strong electromagnetic pulse protection integrated module and printed circuit board processing method thereof | |
| CN210111597U (en) | Electrostatic discharge protection circuit of elevator door motor | |
| CN110289606B (en) | Electrostatic discharge protection circuit of elevator door machine | |
| CN202259966U (en) | Lightning protection transfer connector assembly and lightning protection module | |
| CN201623476U (en) | Lightning stroke filtering protection module | |
| CN113972658B (en) | Anti-power environment suppression circuit, touch screen and touch display device | |
| CN110445110A (en) | A strong electromagnetic pulse multi-level protection device | |
| CN206575160U (en) | A kind of medicine equipment power supply filter circuit | |
| CN207819429U (en) | USB protects circuit | |
| CN206038807U (en) | Electromagnetic compatibility radiated emission test optimization circuit and device | |
| CN205812480U (en) | A kind of static release circuit | |
| CN208522449U (en) | Over-temperature protection device | |
| CN222897239U (en) | Protection circuit for reducing electromagnetic interference of proportional amplifier circuit caused by poor locomotive grounding | |
| CN102340236B (en) | Continuous trigger circuit of protection thyristor under low voltage | |
| CN210168272U (en) | Circuit for conducting anti-interference pulse in transient state of LED vehicle lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |