CN203894376U - Flexible circuit board test circuit and liquid crystal display device - Google Patents
Flexible circuit board test circuit and liquid crystal display device Download PDFInfo
- Publication number
- CN203894376U CN203894376U CN201420314024.XU CN201420314024U CN203894376U CN 203894376 U CN203894376 U CN 203894376U CN 201420314024 U CN201420314024 U CN 201420314024U CN 203894376 U CN203894376 U CN 203894376U
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- Prior art keywords
- flexible pcb
- circuit
- port
- test circuit
- electrode wires
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- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
Landscapes
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
Abstract
The utility model provides a flexible circuit board test circuit and a liquid crystal display device. The flexible circuit board test circuit comprises a circuit wire connected with a pin on a first port of a flexible circuit board to be tested; and an electrode wire, a resistor and a power supply which are connected with one end of the circuit wire in sequence, wherein the electrode wire is a connecting wire arranged on the surface of a substrate and connected with a second port of the flexible circuit board, and the other end of the circuit wire is grounded. A detecting element detects whether the level on a circuit connecting wire between the electrode wire and the resistor is high or low so as to judge whether a closed loop is switched off and further to judge whether the flexible circuit board is broken or torn, thereby preventing the product function failure caused by the breaking of the flexible circuit board.
Description
Technical field
The utility model relates to technical field of liquid crystal display, more particularly, relates to a kind of flexible PCB test circuit and liquid crystal indicator.
Background technology
Flexible PCB, be called for short FPC (Flexible Printed Circuit) or soft board, it is a kind of circuit board of take the pliability printing with height reliability that polyimide or mylar make as base material, owing to having, distribution density is high, lightweight, the feature of thin thickness, therefore, be widely used in the products such as mobile phone, notebook computer, digital camera and LCD TV.
In existing liquid crystal indicator, as shown in Figure 1, the first port 10 of flexible PCB is connected with the mainboard 2 (IC circuit) in liquid crystal indicator, the second port one 1 is connected with contact panel 4 with the display panel 3 of liquid crystal indicator, wherein, described the first port 10 has a plurality of pins that can be connected with mainboard 2, and described the second port one 1 can be connected with a plurality of electrode wires of contact panel 4 substrate surfaces with display panel 3.
In this liquid crystal indicator, if there is fracture or torn up in flexible PCB, may temporarily can not affect the normal demonstration of liquid crystal indicator, but, if continue to use this device, the fracture breach of flexible PCB may further strengthen, and causes the electrode wires fracture between flexible PCB and display panel, touch panel or mainboard, thereby finally causes the inefficacy of product function.
Utility model content
In view of this, the utility model provides a kind of flexible PCB test circuit and liquid crystal indicator, whether the flexible PCB detecting in liquid crystal indicator by test circuit there is fracture or is torn up, the product function inefficacy causing to avoid the further fracture of flexible PCB.
For achieving the above object, the utility model provides following technical scheme:
A flexible PCB test circuit, comprising:
The circuit line being connected with the pin of flexible PCB the first port to be tested;
With electrode wires, resistance and the power supply that described circuit line one end is connected successively, described electrode wires is the connecting line of the substrate surface that is connected with described flexible PCB the second port, and the other end of described circuit line joins with ground.
Preferably, the circuit line that pin described and flexible PCB the first port to be tested is connected is:
The circuit line being all connected with the pin at the two ends of flexible PCB the first port to be tested.
Preferably, the circuit line that pin described and flexible PCB the first port to be tested is connected is:
The circuit line being connected with the pin of one end of flexible PCB the first port to be tested.
Preferably, described flexible PCB test circuit is separately positioned on the both sides of described flexible PCB, comprises connected successively resistance, the first electrode wires, the first pin, the second pin and the second electrode wires.
Preferably, also comprise:
The low and high level detecting element being connected with connecting line between described electrode wires and resistance.
Preferably, described low and high level detecting element is single-chip microcomputer.
Preferably, the Standard resistance range of described resistance is 9K Ω～11K Ω.
Preferably, described electrode wires is the connecting line of contact panel substrate surface and the connecting line on panel substrate surface being connected with described flexible PCB the second port.
Preferably, the connecting line between described circuit line, described circuit line and ground and the connecting line between described circuit line and described electrode wires are all positioned at the surface of described flexible PCB to cover the form of copper.
A liquid crystal indicator, comprises display panel, contact panel, mainboard, flexible PCB and flexible PCB test circuit as above.
Compared with prior art, technical scheme provided by the utility model has the following advantages:
Flexible PCB test circuit provided by the utility model and liquid crystal indicator, the pin of flexible PCB the first port to be tested is connected with circuit line, and by one end of described circuit line successively with electrode wires, resistance is connected with power supply, the other end is connected to the ground, thereby formed closed-loop path, and then can be high level or low level by the level detecting on the connecting line between described electrode wires and resistance, judge whether described closed-loop path disconnects, further judge whether flexible PCB ruptures or torn up, the product function of avoiding the fracture of flexible PCB and causing lost efficacy.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of flexible PCB in liquid crystal indicator in prior art;
The flexible PCB test circuit structure figure that Fig. 2 provides for the utility model embodiment mono-;
The flexible PCB test circuit structure figure that Fig. 3 provides for the utility model embodiment bis-.
Embodiment
As described in background, in existing liquid crystal indicator, flexible PCB there will be fracture or is torn up, cause the inefficacy of product function, in order to find in time the abnormal conditions of flexible PCB, just need test circuit to detect the duty of flexible PCB, in time flexible PCB is carried out to maintenance process, avoid the further fracture of flexible PCB and the product function that causes lost efficacy.
Based on this, the utility model provides a kind of flexible PCB test circuit, and the problems referred to above that exist to overcome prior art, comprising:
The circuit line being connected with the pin of flexible PCB the first port to be tested; With electrode wires, resistance and the power supply that described circuit line one end is connected successively, described electrode wires is the connecting line of the substrate surface that is connected with described flexible PCB the second port, and the other end of described circuit line joins with ground.
The utility model also provides a kind of liquid crystal indicator, comprises display panel, contact panel, mainboard, flexible PCB and above-mentioned flexible PCB test circuit.
Flexible PCB test circuit provided by the utility model and liquid crystal indicator, the pin of flexible PCB the first port to be tested is connected with circuit line, and by one end of described circuit line successively with electrode wires, resistance is connected with power supply, the other end is connected to the ground, thereby formed closed-loop path, and then can be high level or low level by the level detecting on the connecting line between described electrode wires and resistance, judge whether described closed-loop path disconnects, further judge whether flexible PCB ruptures or torn up, the product function of avoiding the fracture of flexible PCB and causing lost efficacy.
Be more than core concept of the present utility model, for above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, embodiment of the present utility model be described in detail.
A lot of details have been set forth in the following description so that fully understand the utility model, but the utility model can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization without prejudice to the utility model intension in the situation that, so the utility model is not subject to the restriction of following public specific embodiment.
Secondly, the utility model is described in detail in conjunction with schematic diagram, when the utility model embodiment is described in detail in detail; for ease of explanation; the sectional view that represents device architecture can be disobeyed general ratio and be done local amplification, and described schematic diagram is example, and it should not limit the scope of the utility model protection at this.The three-dimensional space that should comprise in addition, length, width and the degree of depth in actual fabrication.
Below by several embodiment, describe in detail.
Embodiment mono-
The present embodiment provides a kind of flexible PCB test circuit, as shown in Figure 2, comprising: the circuit line 2 being simultaneously connected with 11 with the pin 10 at the two ends of flexible PCB the first port one to be tested; With electrode wires 3, resistance 4 and the power supply 5 that described circuit line 2 one end are connected successively, described electrode wires 3 is the connecting line of the substrate surface that is connected with described flexible PCB the second port 6, and the other end of described circuit line 2 joins with ground.
In the present embodiment, described test circuit also comprises: the low and high level detecting element being connected with circuit connecting wire A between described electrode wires 3 and resistance 4.Described low and high level detecting element is preferably single-chip microcomputer.
Wherein, in liquid crystal indicator, the parts that are connected with flexible PCB the second port 6 are display panel and contact panel, and described electrode wires 3 is flexible PCB the second port 6 and the connecting line on panel substrate surface and the connecting line of the contact panel substrate surface being connected with flexible PCB the second port 6.Take contact panel as example, described connecting line is the cabling being connected with touch-control electrode in contact panel, described cabling links together touch-control electrode and flexible PCB, and then by the driving circuit in the mainboard being connected with flexible circuit board, drive described touch-control electrode, carry out the mutual of contact panel touch information.Wherein, the material of described electrode wires 3 is preferably ITO (Indium Tin Oxide, tin-doped indium oxide).
And in the test circuit that the present embodiment provides, the Standard resistance range of resistance 4 is 9K Ω～11K Ω, is preferably 10K Ω.And connecting line between circuit line 2, described circuit line 2 and ground and the connecting line between described circuit line 2 and described electrode wires 3 are all positioned at the surface of described flexible PCB or pcb board (mainboard) to cover the form of copper.
When the test circuit that adopts the present embodiment to provide detects, single-chip microcomputer is connected with the circuit connecting wire between electrode wires 3 and resistance 4, be about to single-chip processor i/o (input/output, input and output) probe of port is connected with the circuit connecting wire at A place, reads the level at A point place by single-chip microcomputer.
Because the pin at two ends and the electrode wires of substrate surface 3 of flexible PCB the first port one to be tested formed closed-loop path, therefore, under the normal state of flexible PCB to be tested, when test circuit does not disconnect, testing result is low level; When testing result is high level, illustrate that testing circuit has occurred to open circuit, because test point A is between electrode wires 3 and resistance 4, therefore, the pin place at two ends or electrode wires 3 places of substrate that open circuit and may occur in the first port one.Further, because electrode wires 3 is connecting lines of the substrate surface that is connected with described flexible PCB the second port 6, therefore, if opened circuit herein, illustrate that warpage has occurred flexible PCB, be that flexible PCB is torn up, thereby be connected disconnection between the electrode wires 3 of the flexible PCB causing and substrate.
The flexible PCB test circuit that the present embodiment provides, the pin of flexible PCB the first port to be tested is connected with circuit line, and one end of described circuit line is connected with electrode wires, resistance and power supply successively, the other end is connected to the ground, thereby formed closed-loop path, and then can be high level or low level by the level detecting on the connecting line between described electrode wires and resistance, judge whether described closed-loop path disconnects, further judge whether flexible PCB ruptures or torn up, avoiding the fracture of flexible PCB and the product function inefficacy that causes.
Embodiment bis-
The present embodiment provides a kind of flexible PCB test circuit, as shown in Figure 3, comprise: the circuit line 21 being connected with the pin of one end of flexible PCB the first port 11 to be tested, the first electrode wires 31, resistance 41 and the power supply 51 that are connected successively with described circuit line 21 one end, described the first electrode wires 31 is the connecting line of the substrate surface that is connected with described flexible PCB the second port 61, and the other end of described circuit line 21 joins with ground.Wherein, the pin being connected with circuit line 21 is two the first connected pins 00 and the second pin 01, and the other end of described circuit line 21 is before ground connection, is connected with the second electrode wires 32 of substrate surface.
Be in the present embodiment, connected resistance 41, the first electrode wires 31, the first pin 00, the second pin 01 and the second electrode wires 32 formed closed-loop path successively.And, preferred, as shown in Figure 3, described test circuit is positioned at the both sides of flexible PCB, whether fracture occurs or tear up, certainly to test respectively the both sides port of flexible PCB, in other embodiments, it can only be positioned at a side of flexible PCB, and this case is not limited in this.
In like manner, when the test circuit that adopts the present embodiment to provide detects, single-chip microcomputer is connected with the connecting line between the first electrode wires 31 and resistance 41, and the probe that is about to single-chip processor i/o port is connected with the circuit connecting wire at B place or C place, reads the level at B place or C place by single-chip microcomputer.
Because two pins of flexible PCB the first port 11 to be tested and two electrode wires of substrate surface have formed closed-loop path jointly, therefore, under the normal state of flexible PCB to be tested, when test circuit does not disconnect, testing result is low level; When testing result is high level, illustrate that testing circuit has occurred to open circuit, because test point B is between electrode wires and resistance, therefore, opens circuit and may occur in two pin places of the first port 11 or two electrode wires places of substrate.Because electrode wires is the connecting line of the substrate surface that is connected with described flexible PCB the second port 61, therefore,, if opened circuit, illustrate that warpage has occurred flexible PCB herein, be that flexible PCB is torn up, thereby be connected disconnection between the electrode wires of the flexible PCB causing and substrate.
The flexible PCB test circuit that the present embodiment provides, by two pins of flexible PCB the first port to be tested are connected with two circuit lines, build closed-loop path, thereby can be high level or low level by the level detecting on the connecting line between described electrode wires and resistance, judge whether described closed-loop path disconnects, further judge whether flexible PCB ruptures or torn up, avoiding the fracture of flexible PCB and the product function inefficacy that causes.
Embodiment tri-
The present embodiment provides a kind of liquid crystal indicator, comprises the flexible PCB test circuit that display panel, contact panel, mainboard, flexible PCB and above-described embodiment provide.
The liquid crystal indicator that the present embodiment provides, by the flexible PCB test circuit being connected with flexible PCB, can detect and judge that whether described flexible PCB to be tested is in normal operating conditions, and then can judge whether flexible PCB ruptures or be torn up, avoid the further fracture of flexible PCB and the product function that causes lost efficacy.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part partly illustrates referring to method.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a flexible PCB test circuit, is characterized in that, comprising:
The circuit line being connected with the pin of flexible PCB the first port to be tested;
With electrode wires, resistance and the power supply that described circuit line one end is connected successively, described electrode wires is the connecting line of the substrate surface that is connected with described flexible PCB the second port, and the other end of described circuit line joins with ground.
2. test circuit according to claim 1, is characterized in that, the circuit line that the pin of flexible PCB the first port described and to be tested is connected is:
The circuit line being all connected with the pin at the two ends of flexible PCB the first port to be tested.
3. test circuit according to claim 1, is characterized in that, the circuit line that the pin of flexible PCB the first port described and to be tested is connected is:
The circuit line being connected with the pin of one end of flexible PCB the first port to be tested.
4. test circuit according to claim 3, it is characterized in that, described flexible PCB test circuit is separately positioned on the both sides of described flexible PCB, and the described flexible PCB test circuit of each side comprises connected successively resistance, the first electrode wires, the first pin, the second pin and the second electrode wires.
5. according to the test circuit described in claim 2 or 3, it is characterized in that, also comprise:
The low and high level detecting element being connected with connecting line between described electrode wires and resistance.
6. test circuit according to claim 5, is characterized in that, described low and high level detecting element is single-chip microcomputer.
7. test circuit according to claim 6, is characterized in that, the Standard resistance range of described resistance is 9K Ω～11K Ω.
8. test circuit according to claim 7, is characterized in that, described electrode wires is the connecting line of contact panel substrate surface and the connecting line on panel substrate surface being connected with described flexible PCB the second port.
9. test circuit according to claim 8, is characterized in that, the connecting line between described circuit line, described circuit line and ground and the connecting line between described circuit line and described electrode wires are all positioned at the surface of described flexible PCB to cover the form of copper.
10. a liquid crystal indicator, is characterized in that, comprises display panel, contact panel, mainboard, flexible PCB and the flexible PCB test circuit as described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314024.XU CN203894376U (en) | 2014-06-12 | 2014-06-12 | Flexible circuit board test circuit and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314024.XU CN203894376U (en) | 2014-06-12 | 2014-06-12 | Flexible circuit board test circuit and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203894376U true CN203894376U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420314024.XU Expired - Lifetime CN203894376U (en) | 2014-06-12 | 2014-06-12 | Flexible circuit board test circuit and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203894376U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771967A (en) * | 2016-12-07 | 2017-05-31 | 深圳市科陆物联信息技术有限公司 | Core board test device and method |
| CN106771980A (en) * | 2017-01-16 | 2017-05-31 | 京东方科技集团股份有限公司 | A kind of flexible circuit board detecting device and detection method |
| CN107688143A (en) * | 2017-08-29 | 2018-02-13 | 京东方科技集团股份有限公司 | A kind of flexible PCB detection circuit, flexible PCB and its detection method |
-
2014
- 2014-06-12 CN CN201420314024.XU patent/CN203894376U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771967A (en) * | 2016-12-07 | 2017-05-31 | 深圳市科陆物联信息技术有限公司 | Core board test device and method |
| CN106771980A (en) * | 2017-01-16 | 2017-05-31 | 京东方科技集团股份有限公司 | A kind of flexible circuit board detecting device and detection method |
| CN107688143A (en) * | 2017-08-29 | 2018-02-13 | 京东方科技集团股份有限公司 | A kind of flexible PCB detection circuit, flexible PCB and its detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141022 |