CN109633952A - A kind of industrial touch screen electrostatic protection apparatus - Google Patents
A kind of industrial touch screen electrostatic protection apparatus Download PDFInfo
- Publication number
- CN109633952A CN109633952A CN201910051930.2A CN201910051930A CN109633952A CN 109633952 A CN109633952 A CN 109633952A CN 201910051930 A CN201910051930 A CN 201910051930A CN 109633952 A CN109633952 A CN 109633952A
- Authority
- CN
- China
- Prior art keywords
- touch screen
- circuit board
- electrostatic protection
- electrostatic
- liquid crystal
- 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.)
- Pending
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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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/02—Carrying-off electrostatic charges by means of earthing connections
Abstract
The present invention provides a kind of industrial touch screen electrostatic protection apparatus, belong to electrostatic protection field, including capacitance touch screen, liquid crystal display, capacitance touch screen control circuit, industry screen external key, key electrostatic protection device, circuit board and conducting foam, the present invention proposes new capacitive touch screen electrostatic sensitive circuit design processing mode, electrostatic conductive channel is increased to the aluminum shell at the industrial liquid crystal display back side simultaneously, increase Electro-static Driven Comb channel on circuit boards, shorten electrostatic loop as far as possible, to which influence of the electrostatic to product be effectively reduced, the device of the invention structure and circuit design are all very simple, it is smaller to account for product area specific gravity, while electrostatic, which is effectively reduced, influences product, the design cost of product will not additionally be increased.
Description
Technical field
The present invention relates to electrostatic protection fields, refer in particular to a kind of industrial touch screen electrostatic protection apparatus.
Background technique
Electro-static Driven Comb ESD ((Electro-Static discharge) is the big factor for influencing product and working normally,
Product failure is resulted even in some cases.In industrial applications, the reliability of product directly affect system stabilization and
Personal safety, therefore the electrostatic protection of industrial products is also the emphasis of product design.Industrial LCD is as the aobvious of whole system
Show component, can integrated control and data acquisition function, liquid crystal display and touch screen contacted with people it is more, since internal cabling is longer,
Or structure design etc. designs the reasons such as unreasonable, is easy to be led to screen flash by electrostatic interference in practice, the failures such as flower screen are asked
Topic, industrial touch screen carries out electrostatic protection measure, can effectively prevent by the crosstalk of electrostatic bring, showing more as.
Patent ZL.201611168733.1 discloses the electrostatic discharge structure and its method of a kind of liquid crystal display, the structure packet
An Electro-static Driven Comb cabling and the ESD pin that display screen edge is set are included, Electro-static Driven Comb cabling is evenly distributed on display screen
The blank space at three side edges of surrounding, and the both ends of the Electro-static Driven Comb cabling all extend to the blank space of step, are covered with two steps
Two ends of Electro-static Driven Comb cabling of blank space be connected to ESD pin, and the two is connected, Electro-static Driven Comb cabling be located at glass and
Between the frame of display screen.Although the patent can protect electrostatic, the increased Electro-static Driven Comb cabling of institute to a certain extent
It is covered with the blank space of two steps, shared product area is larger, and is in product edge, is easy in long-time use process
It falls off, to influence the antistatic protection function of whole device.
In addition, since capacitive touch display screen anti-interference ability is weaker, being answered from the point of view of existing industry screen status
With seldom.The anti-static precautions that product is taken at present is usually to add electrostatic devices, and electrostatic ring etc., complex structural designs, circuit is set
Meter is complicated, and it is larger to account for product area, therefore, effectively solves the problems, such as industry capacitor touching display screen electrostatic sensitive and ability
Domain urgent problem.
Summary of the invention
The object of the present invention is to provide a kind of industrial touch screen electrostatic protection apparatus, from structure and technique and circuit
Design addresses the electrostatic protection problem of industrial products.
In order to solve the above technical problems, technical scheme is as follows:
A kind of industrial touch screen electrostatic protection apparatus, it is characterised in that: including capacitance touch screen, liquid crystal display,
Capacitance touch screen control circuit, industry screen external key, key electrostatic protection device, circuit board and conducting foam；The liquid crystal
Display location is between capacitance touch screen and circuit board；The capacitance touch screen and capacitance touch screen control circuit pass through conductive bubble
Cotton patch is combined；The liquid crystal display back side has aluminum base plate face, capacitance touch screen control circuit and liquid crystal display
The aluminum base plate face contact at the back side；The circuit board monolith is directly and the aluminum base plate face at the liquid crystal display back side passes through conductive bubble
Cotton sticks together, and real estate itself passes through conducting foam and connect with circuit board ground plane；Increase entire Horizon on the circuit board
Torus network；Industry screen external key region, which is closed on, has key electrostatic protection device in circuit design；On the circuit board
With ground pad.
The circuit board uses stack-design, guarantees complete GND ground level；FPC cable socket on the circuit board
Spacing between equal key signals interface and shell is greater than 1mm.
The data in liquid crystal display screen line surrounding increases common ground package, and comes into full contact with circuit board ground, liquid crystal
Screen data line concatenates high speed electrostatic devices, while increasing bus driver, improves bus driver ability.
Ground pad on the circuit board is distributed in the central area and neighboring area of circuit board, and ground pad passes through electricity
Independent ground level is connected with port GND on the plate of road, reduces impedance loop and length；It is hindered between the ground pad and conducting foam
Resist less than 0.5 Ω, impedance is less than 0.5 Ω between ground pad and product port ground.
Touching signals output bus and power supply line, the ground wire of the electrostatic protection apparatus take ground wire to wrap up, and its
It is greater than 1mm with shell distance.
The key electrostatic protection device uses signal ESD device, and ESD device is placed on the key back side, while increasing RC
Filter circuit, filter circuit are that resistance is R=10K Ω, capacitor C=1nf.
Glass panel thickness on the capacitive touch screen panel is greater than ordinary consumption class glass panel thickness.
The glass panel covered on the capacitive touch screen panel is with a thickness of 2mm or more.
There is electric wire ground terminal GND, the electrostatic on the liquid crystal display is back to rapidly by GND on the circuit board
The damage of key electrostatic protection device is reduced in common end.
The invention has the benefit that
Compared with prior art, the present invention proposes new capacitive touch screen electrostatic sensitive circuit design processing mode, together
When electrostatic conductive channel is increased to the aluminum shell at the industrial liquid crystal display back side, increase Electro-static Driven Comb channel on circuit boards, as far as possible
Shorten electrostatic loop, so that influence of the electrostatic to product be effectively reduced, the device of the invention structure and circuit design are all very
Simply, it is smaller to account for product area specific gravity, while electrostatic, which is effectively reduced, influences product, will not additionally increase the design of product
Cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of industrial touch screen electrostatic protection apparatus of the present invention.
Main element symbol description is as follows: 1 indicates capacitance touch screen, and 2 indicate liquid crystal display, and 3 indicate capacitance touch screen
Control circuit, 4 indicate industry screen external key, and 5 indicate key electrostatic protection device, and 6 indication circuit plates, 7 indicate conducting foam.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
The present embodiment provides a kind of industrial touch screen electrostatic protection apparatus, specific embodiment is as follows:
As shown in Fig. 1, the industrial touch screen electrostatic protection apparatus designed by the present invention mainly includes capacitance touch
Screen 1, liquid crystal display 2, capacitance touch screen control circuit 3, industry screen external key 4, key electrostatic protection device 5, circuit board 6
With conducting foam 7.
Liquid crystal display 2 is between capacitance touch screen 1 and circuit board 6, capacitance touch screen 1 and capacitance touch screen control electricity
Road 3 is fit together by conducting foam 7, and 2 back side of liquid crystal display has aluminum base plate face, capacitance touch screen control circuit 3
With the aluminum base plate face contact at 2 back side of liquid crystal display, 6 monolith of circuit board directly and 2 back side of liquid crystal display aluminum base plate
Face is sticked together by conducting foam, and real estate itself passes through conducting foam and connect with 6 ground level of circuit board.
Increase entirely planar network on circuit board 6, for the electrostatic protection of product back cover portion, circuit board 6 is using folded
Layer design, guarantees complete GND ground level, between FPC cable socket on circuit board 6 etc. is between key signals interface and shell
Away from greater than 1mm.There is electric wire ground terminal GND, the electrostatic on liquid crystal display 2 is back to rapidly public by GND on circuit board 6
End, can effectively reduce the damage of key electrostatic protection device 5.
2 data line surrounding of liquid crystal display increases common ground package, and comes into full contact with 6 ground wire of circuit board, liquid crystal
2 data line of display screen concatenates high speed electrostatic devices, while increasing bus driver, improves bus driver ability.
Ground pad on circuit board 6 is distributed in the central area and neighboring area of circuit board 6, and ground pad passes through circuit
Independent ground level is connected with port GND on plate 6, reduces impedance loop and length, impedance is small between ground pad and conducting foam
In 0.5 Ω, impedance is less than 0.5 Ω between ground pad and product port ground.
The present invention increases Electro-static Driven Comb channel on circuit board 6, shortens electrostatic loop as far as possible shortly, compresses Electro-static Driven Comb
Time can effectively reduce influence of the electrostatic to product.
The touching signals output bus (such as iic bus or usb bus etc.) and power supply line of entire electrostatic protection apparatus,
Line takes ground wire to wrap up, and it is greater than 1mm with shell distance.
For industry screen external key 4 due to more with external human contact, use is more frequent, and the damage of ESD device may
Property it is larger, industry screen 5 region of external key close in circuit design have key electrostatic protection device 5, key static protector
Part 5 uses signal ESD device, and ESD device can be placed in the key back side, while increase RC filter circuit, and filter circuit is electricity
Resistance is R=10K Ω, capacitor C=1nf.
Ordinary consumption class glass panel thickness is generally 0.7mm, if ordinary consumption class glass panel is directly used for electricity
Hold touch screen, electrostatic damage caused by touch screen can not be effectively reduced, therefore, the glass surface plate thickness on capacitive touch screen panel
Degree is greater than ordinary consumption class glass panel thickness in a specific embodiment can be by the glass panel on capacitive touch screen panel
Thickness design is 2mm.
Apparatus structure designed by the present invention and electrostatic designs are all very simple, and it is smaller to account for product area specific gravity, are having
Effect reduces electrostatic to while product influence, will not additionally increase the design cost of product.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (9)
1. a kind of industrial touch screen electrostatic protection apparatus, it is characterised in that: including capacitance touch screen, liquid crystal display, electricity
Hold touch screen control circuit, industry screen external key, key electrostatic protection device, circuit board and conducting foam；The liquid crystal
Display screen is between capacitance touch screen and circuit board；The capacitance touch screen and capacitance touch screen control circuit pass through conducting foam
It fits together；The liquid crystal display back side has aluminum base plate face, and capacitance touch screen control circuit and liquid crystal display are carried on the back
The aluminum base plate face contact in face；The circuit board monolith is directly and the aluminum base plate face at the liquid crystal display back side passes through conducting foam
It sticks together, real estate itself passes through conducting foam and connect with circuit board ground plane；Increase entire ground level on the circuit board
Network；Industry screen external key region, which is closed on, has key electrostatic protection device in circuit design；Have on the circuit board
There is ground pad.
2. industrial touch screen electrostatic protection apparatus according to claim 1, it is characterised in that: the circuit board uses
Stack-design guarantees complete GND ground level；The key signals such as FPC cable socket on circuit board interface and shell it
Between spacing be greater than 1mm.
3. industrial touch screen electrostatic protection apparatus according to claim 1, it is characterised in that: the liquid crystal display
Data line surrounding increases common ground package, and comes into full contact with circuit board ground, and data in liquid crystal display screen line concatenates high-speed static
Electrical part, while increasing bus driver, improve bus driver ability.
4. industrial touch screen electrostatic protection apparatus according to claim 1, it is characterised in that: on the circuit board
Ground pad is distributed in the central area and neighboring area of circuit board, and ground pad passes through independent ground level on circuit board and end
Mouth GND is connected, and reduces impedance loop and length；Impedance is less than 0.5 Ω between the ground pad and conducting foam, ground pad with
Impedance is less than 0.5 Ω between the ground of product port.
5. industrial touch screen electrostatic protection apparatus according to claim 1, it is characterised in that: the electrostatic protection dress
Touching signals output bus and power supply line, the ground wire set take ground wire to wrap up, and it is greater than 1mm with shell distance.
6. industrial touch screen electrostatic protection apparatus according to claim 1, it is characterised in that: the key electrostatic is anti-
It protects device and uses signal ESD device, ESD device is placed on the key back side, while increasing RC filter circuit, and filter circuit is electricity
Resistance is R=10K Ω, capacitor C=1nf.
7. industrial touch screen electrostatic protection apparatus according to claim 1, it is characterised in that: the capacitance touch screen
Glass panel thickness on panel is greater than ordinary consumption class glass panel thickness.
8. industrial touch screen electrostatic protection apparatus according to claim 1, it is characterised in that: the capacitance touch screen
The glass panel covered on panel is with a thickness of 2mm or more.
9. industrial touch screen electrostatic protection apparatus according to claim 1, it is characterised in that: have on the circuit board
Live wire ground terminal GND, the electrostatic on the liquid crystal display are back to rapidly common end by GND, it is anti-to reduce key electrostatic
Protect the damage of device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910051930.2A CN109633952A (en) | 2019-01-21 | 2019-01-21 | A kind of industrial touch screen electrostatic protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910051930.2A CN109633952A (en) | 2019-01-21 | 2019-01-21 | A kind of industrial touch screen electrostatic protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109633952A true CN109633952A (en) | 2019-04-16 |
Family
ID=66061472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910051930.2A Pending CN109633952A (en) | 2019-01-21 | 2019-01-21 | A kind of industrial touch screen electrostatic protection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109633952A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112822828A (en) * | 2020-12-31 | 2021-05-18 | 成都旭光科技股份有限公司 | Circuit for improving electrostatic protection capability of WiFi module |
| WO2021208590A1 (en) * | 2020-04-16 | 2021-10-21 | 京东方科技集团股份有限公司 | Display device |
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| CN204967250U (en) * | 2015-09-14 | 2016-01-13 | 惠州市康冠科技有限公司 | Be applied to ESD protection circuit in circuit |
| CN105592679A (en) * | 2016-03-09 | 2016-05-18 | 深圳市华星光电技术有限公司 | Pcb fixing structure and liquid crystal display device |
| CN107645899A (en) * | 2017-08-31 | 2018-01-30 | 广东欧珀移动通信有限公司 | Electrostatic protection apparatus and electronic equipment |
| CN207201057U (en) * | 2017-08-04 | 2018-04-06 | 珠海市魅族科技有限公司 | Terminal device |
| CN109116608A (en) * | 2018-09-14 | 2019-01-01 | Oppo（重庆）智能科技有限公司 | Display screen, the manufacturing method of display screen and electronic equipment |
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|---|---|---|---|---|
| CN1749830A (en) * | 2004-09-17 | 2006-03-22 | 三洋电机株式会社 | Liquid crystal display device and a mobile information terminal including a liquid crystal display device |
| CN101086827A (en) * | 2006-06-05 | 2007-12-12 | 三星电子株式会社 | Driving device and a liquid crystal display including the same |
| CN101281314A (en) * | 2008-05-20 | 2008-10-08 | 友达光电股份有限公司 | LCD device with electro-static discharge protection function |
| CN201532510U (en) * | 2009-08-20 | 2010-07-21 | 深圳市科利德光电材料股份有限公司 | LCD panel and LCD panel combination |
| CN102654797A (en) * | 2011-03-02 | 2012-09-05 | 东莞万士达液晶显示器有限公司 | Touch control panel |
| CN103376966A (en) * | 2012-04-19 | 2013-10-30 | 乐金显示有限公司 | Electrostatic capacity type touch screen panel for display device and method of manufacturing the same |
| CN204967250U (en) * | 2015-09-14 | 2016-01-13 | 惠州市康冠科技有限公司 | Be applied to ESD protection circuit in circuit |
| CN105592679A (en) * | 2016-03-09 | 2016-05-18 | 深圳市华星光电技术有限公司 | Pcb fixing structure and liquid crystal display device |
| CN207201057U (en) * | 2017-08-04 | 2018-04-06 | 珠海市魅族科技有限公司 | Terminal device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021208590A1 (en) * | 2020-04-16 | 2021-10-21 | 京东方科技集团股份有限公司 | Display device |
| CN112822828A (en) * | 2020-12-31 | 2021-05-18 | 成都旭光科技股份有限公司 | Circuit for improving electrostatic protection capability of WiFi module |
| CN112822828B (en) * | 2020-12-31 | 2024-03-15 | 成都旭光科技股份有限公司 | Circuit for improving electrostatic protection capability of WiFi module |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190416 |