CN103134440A - Circuit board curvature detecting device and circuit board curvature detecting method - Google Patents
Circuit board curvature detecting device and circuit board curvature detecting method Download PDFInfo
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- CN103134440A CN103134440A CN2011103789275A CN201110378927A CN103134440A CN 103134440 A CN103134440 A CN 103134440A CN 2011103789275 A CN2011103789275 A CN 2011103789275A CN 201110378927 A CN201110378927 A CN 201110378927A CN 103134440 A CN103134440 A CN 103134440A
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Abstract
The invention provides a circuit board curvature detecting device. The circuit board curvature detecting device comprises a circuit board, an optical conductor unit, an optical transmitting device and an optical receiver, wherein the optical conductor unit is arranged on the circuit board and provided with a first optical medium, a second optical medium, a transmitting end and a receiving end, the optical transmitting device is used for transmitting light ray from the transmitting end, and the optical receiver detects whether the receiving end receives the light ray or not and produces a warning signal when the light ray is not received. The circuit board curvature detecting device can detect whether the curvature exceeds a critical bending angle or not.
Description
Technical field
The present invention relates generally to a kind of circuit board curvature pick-up unit, particularly a kind of circuit board curvature pick-up unit with optical conductor unit.
Background technology
At present, the electronic equipments such as smart mobile phone, flat computer or personal digital assistant (personal digtal assistant) can charge by wireless charging device.In general, wireless charging device by inductive component (for example, coil) provide magnetic energy to carry out charging procedure, the electronic equipment that wherein charges receives the magnetic energy of wireless charging device supply by inductive component, magnetic energy is converted to AC energy, then more further by rectifier stack etc., provide the electronic equipment of power supply to the wish charging.
In addition, when wireless charging device is carried out charging to electronic equipment, therefore the electromagnetic induction that utilizes inductive component to produce due to need must be positioned as close to the inductive component of the inductive component of wireless charging device and the electronic equipment that charges and align, thereby improve charge efficiency.Yet, if the electronic equipment that charges is a kind of flexible circuit panel assembly or Electronic Paper and so on flexible circuit board, may be because not smooth put or crooked part allows part inductive component on circuit board and the relative distance of wireless charging device change, make charge efficiency reduce, cause need to be longer duration of charging even cause and can't charge.
Summary of the invention
In order to address the above problem, a kind of circuit board curvature pick-up unit described according to one embodiment of the invention comprises: a circuit board; One optical conductor unit is arranged at the foregoing circuit plate, and has a transmitting terminal and a receiving end; One optical transmitting set is used to above-mentioned transmitting terminal emission one light; An and optical receiver, detect above-mentioned receiving end and whether receive above-mentioned light, when not receiving above-mentioned light, produce an alarm signal, wherein when a flexibility of circuit board surpasses a critical bends angle, above-mentioned optical conductor unit can't transmit above-mentioned light.
A kind of circuit board curvature detection method described according to one embodiment of the invention comprises: optical conductor unit to a circuit board is set; Transmitting terminal emission one light in above-mentioned optical conductor unit; And whether a receiving end that detects above-mentioned optical conductor unit receives above-mentioned light, when not receiving above-mentioned light, produce an alarm signal, wherein when a flexibility of circuit board surpasses a critical bends angle, above-mentioned optical conductor unit can't transmit above-mentioned light.
But whether the present invention's testing circuit bending of plate degree surpasses the critical bends angle.
Description of drawings
By reading following detailed description and coordinating giving an example of accompanying drawing, can more completely understand disclosed, as follows:
Fig. 1 is for showing the calcspar of circuit board bending degree detecting device described according to one embodiment of the invention.
Fig. 2 A is the diagrammatic cross-section of display light conductor element 110-1.
Fig. 2 B is the diagrammatic cross-section of display light conductor element 110-1 when producing bending.
Fig. 3 is for showing circuit board curvature pick-up unit described according to another embodiment of the present invention.
Fig. 4 is for showing the process flow diagram of the embodiment of the method for circuit board curvature pick-up unit shown in Figure 3 according to the present invention.
Main description of reference numerals:
100,300～circuit board;
110-1,110-2,310～optical conductor unit;
120,320～wireless charging unit;
130,330～external wireless charging device;
L～light;
M1, m2～light medium;
N, N '～dotted line, normal;
Rx, Rx-1, Rx-2～optical receiver;
Tx, Tx-1, Tx-2～optical transmitting set;
θ, θ
1～incident angle;
θ
2～refraction angle;
Φ～flexibility.
Embodiment
Below narration shows the embodiment that many present invention of borrowing complete.Its narration is in order to illustrate key concept of the present invention and without the connotation that limits.Scope of the present invention has best defining in the appended claims.
Fig. 1 is for showing circuit board curvature pick-up unit described according to one embodiment of the invention.Circuit board curvature pick-up unit comprises circuit board 100, optical conductor unit 110-1, optical transmitting set Tx-1, optical receiver Rx-1, optical conductor unit 110-2, optical transmitting set Tx-2, optical receiver Rx-2 and wireless charging unit 120.Circuit board 100 is generally a kind of flexible circuit arrangement, for example flexible circuit board or Electronic Paper.
Optical conductor unit 110-1 longitudinal direction is arranged at (for example, Y-direction) on circuit board 100, and optical conductor unit 110-2 transverse direction is arranged at (for example, directions X) on circuit board 100, in order to detect respectively the flexibility of two different directions.Optical transmitting set Tx-1 is arranged at the end of optical conductor unit 110-1, can be called transmitting terminal.Optical receiver Rx-1 is arranged at the other end of optical conductor unit 110-1, can be called receiving end.Similarly, optical transmitting set Tx-2 is arranged at the end of optical conductor unit 110-2, and optical receiver Rx-2 is arranged at the other end of optical conductor unit 110-2.Due to the optical conductor unit when flexibility is excessive, to cause light to be sent to the other end (reason is in rear discussion in detail) by an end, therefore can whether correspondingly receive the light that transmitter Tx-1 launches according to receiver Rx-1, whether whether receiver Rx-2 correspondingly receives the light that transmitter Tx-2 launches excessive with the flexibility that detects respectively all directions, produces alarm signal when receiver Rx-1 or Rx-2 do not receive corresponding light.In certain embodiments, circuit board 100 also can be by arranging display unit showing the excessive information of flexibility according to alarm signal, or by loudspeaker unit being set to send warning sound according to alarm signal.According to aforesaid way, the present invention by with the optical conductor unit along with circuit board is crooked, but also whether testing circuit bending of plate degree surpasses the critical bends angle.
Wherein wireless charging unit 120 in order to the electromagnetic signal that receives external wireless charging device 130 to provide circuit board 100 power supplys, for example to the battery charging of circuit board 100 or directly as the power supply supply.In general, when wireless charging, have more usefulness in order to make charging, can make the wireless charging unit of wireless charging unit 120 and external wireless charging device 130 keep nearer distance as far as possible, thereby laid parallel.Therefore, distant if circuit board 100 produces the crooked wireless charging cell mesh of wireless charging unit 120 and external wireless charging device 130 that may cause, may charge not exclusively or the waste electrical source consumption.Therefore as the present invention when receiver Rx-1 or Rx-2 do not receive corresponding light, the alarm signal that produces can also be a kind of charging signals that stops, by the signal transmitter unit, be sent to the signal receiving unit of external wireless charging device 130, external recharging apparatus 130 stops charging signals charge closing mechanism according to what receive again, no longer send the electromagnetic signal that is used for charging, and then reduce unnecessary power consumption.In certain embodiments, wireless charging unit 120 can stop charging signals with transmission according to alarm signal modulation electromagnetic signal, and the wireless charging unit of external recharging apparatus 130 can be according to electromagnetic signal charge closing mechanism after the modulation that receives.
For clearer understanding the present invention, below in order to explaining that the present invention controls the mechanism of optical conductor conducting light, and because optical conductor unit 110-2 is identical with the mode of action of 110-1, in order only to explain as representative with optical conductor unit 110-1 below simplifying.
Fig. 2 A is the diagrammatic cross-section of display light conductor element 110-1, and the dotted line N in diagram represents the normal at this interface.Optical conductor unit 110-1 forms by two kinds of different light media usually, and one of them light medium m1 is positioned at the inside of optical conductor unit 110-1, and another light medium m2 coats light medium m1, is positioned at the skin of optical conductor unit 110-1.When optical transmitting set Tx-1 during in the transmitting terminal of optical conductor unit 110-1 emission one light L (for example, infrared ray), and advance for light L can be reflected between light medium m1 and light medium m2, the refractive index n 2 that the refractive index n 1 of light medium m1 needs greater than light medium m2 is by the formula critical angle θ of total reflection
T=sin
-1(n2/n1) can understand light L at incidence angle θ greater than critical angle θ
TIn time, injected optical conductor unit 110-1 and will produce total reflection when inner, so is able to light L is sent to receiving end by the transmitting terminal of optical conductor unit 110-1.Therefore can be by the refractive index n 1 that changes light medium m1 and the refractive index n 2 of light medium m2, can be in order to change critical angle θ
TSize.
Fig. 2 B is the diagrammatic cross-section of display light conductor element 110-1 when producing bending, and the dotted line N in diagram represents the not normal of curved interface, and dotted line N ' represents the normal of curved interface.As shown in Fig. 2 B, when the interface between light L incident light medium m1 and light medium m2, because optical conductor unit 110-1 produces bending, (incidence angle θ becomes incidence angle θ to cause incident angle to diminish
1), at this moment, if incidence angle θ
1Less than critical angle θ
T, according to n
1Sin θ
1=n
2Sin θ
2As can be known, can produce the refraction angle at this medium intersection is θ
2Refraction, then light L penetrating light medium m2, and light L can't continue at and continues reflection in light medium m1 and advance to the other end.Hence one can see that, if when the receiving end of optical conductor unit 110-1 can't receive the light L that transmitting terminal launches, the flexibility of a section is excessive at least therein can to represent optical conductor unit 110-1, and wherein flexibility is that Φ is dotted line N and the folded angle of N '.In addition, by diagram as can be known, incidence angle θ
1Equal former incidence angle θ and deduct flexibility Φ (θ-Φ=θ
1), work as sin therefore can draw
-1During (n2/n1)＞θ-Φ, light L will reflect and can't be sent to receiving end.Whereby, the present invention can be by the refractive index n 1 of selective light medium m1 and refractive index n 2 and the incident angle θ of light medium m2, to control critical bends angle Φ
T, and then whether whether receive light L decision flexibility Φ over default critical bends angle Φ according to the receiving end of optical conductor unit 110-1
TIn addition, because refractive index and light frequency have inverse relation, therefore also can be by the frequency (for example, selecting the different wave length line) that changes light L to determine critical bends angle Φ
T
Though optical conductor shown in Figure 1 unit is arranged on circuit board, but still can be arranged at the circuit board another side or be embedded in circuit board (for example by the circuit board manufacturing process technology, the optical conductor unit being arranged at wherein one deck of circuit board).And in above-described embodiment, although optical conductor unit 110-1 and 110-2 are arranged on circuit board 100 with longitudinal direction and transverse direction respectively, yet the present invention is limited to this, still can the optical conductor unit be arranged on any direction according to the direction of required detection flexibility, arrange to meet demand with any shape or quantity.In some embodiments of the invention, optical conductor unit 110-1 and 110-2 can be a kind of optical fiber, and light L can be a kind of infrared ray.
Fig. 3 is for showing circuit board curvature pick-up unit described according to another embodiment of the present invention.Circuit board curvature pick-up unit in the present embodiment comprises circuit board 300, optical conductor unit 310, optical transmitting set Tx, optical receiver Rx and wireless charging unit 320.Circuit board 300 is generally a kind of flexible circuit arrangement, for example flexible circuit board or Electronic Paper.Wherein optical conductor unit 310 also is same as first embodiment, when flexibility is excessive, to cause light to be sent to the other end by an end, therefore can whether correspondingly receive the light that transmitter Tx launches according to receiver Rx, whether the flexibility of testing circuit plate 300 is excessive, produces alarm signal when receiver Rx does not receive corresponding light.In certain embodiments, circuit board 300 also can be by arranging display unit showing the excessive information of flexibility according to alarm signal, or by loudspeaker unit being set to send warning sound according to alarm signal.
Wherein wireless charging unit 320 in order to the electromagnetic signal that receives external wireless charging device 330 to provide circuit board 300 power supplys, for example to the battery charging of circuit board 300 or directly as the power supply supply.In general, in order to make charging have more usefulness, can make the wireless charging unit of wireless charging unit 320 and external wireless charging device 330 keep nearer distance when wireless charging as far as possible, thereby laid parallel.Therefore, distant if circuit board 300 produces the crooked wireless charging cell mesh of wireless charging unit 320 and external wireless charging device 330 that may cause, may charge not exclusively or the waste electrical source consumption.When therefore receiver Rx does not receive corresponding light, the alarm signal that produces can also be a kind of charging signals that stops, by the signal transmitter unit, be sent to external wireless charging device 330, the signal receiving unit of external recharging apparatus 330 stops charging signals charge closing mechanism according to what receive again, no longer send the electromagnetic signal that is used for charging, and then reduce unnecessary power consumption.In certain embodiments, wireless charging unit 320 can stop charging signals with transmission according to alarm signal modulation electromagnetic signal, and the wireless charging unit of external recharging apparatus 330 can be according to electromagnetic signal charge closing mechanism after the modulation that receives.
In this embodiment, the function mode of each assembly is all identical with circuit board curvature pick-up unit in first embodiment haply, the flexibility that difference is only to utilize in the present embodiment single optical conductor unit 310 to complete both direction detects, so as to the use that reduces circuit unit and reduce costs.As shown in the figure, optical conductor unit 310 is staggered to form crosswise in circuit board 300 central authorities, detects whereby the flexibility of two different directions.Due to the optical conductor unit when flexibility is excessive, also can cause light to be sent to the other end by an end, therefore optical conductor unit 310 will be controlled at flexibility less than the critical bends degree in the part of bending setting in the present embodiment, can't be sent to receiving end by transmitting terminal to avoid light.In other embodiment of the present invention, optical conductor unit 310 can utilize different light medium n1 and n2 to form at different sections, make the part section different to the susceptibility of flexibility, can make whereby curved section and the linear section of optical conductor unit 310 still can have the critical bends angle Φ that is same as
TAlso can be in the optical conductor unit under special situation 310 the sectional smooth medium of section be set to not spend by bending the Φ impact, and then this section for must occuring, the total reflection conducting light is advanced, with the position of not needing avoiding detecting, by this mode, the arrangement mode of optical conductor unit 310 can be more flexible, and do not affect the section of required detection.in addition, the light medium that optical conductor unit 310 can rupture in the time of also can being used in larger flexibility forms, when circuit board 300 may produce macrobending under the situation of not energising, therefore optical conductor unit 310 can rupture, therefore receiver Rx can't receive light and can produce alarm signal after energising, notify whereby user's circuit board 300 once to produce macrobending, to notify user's circuit board may partly produce the relevant issues such as damage, or be applied on circuit board manufacturing process, produce the circuit board of damage with Improving The Quality of Products so as to eliminating because living through macrobending.
Fig. 4 is for showing the process flow diagram of the embodiment of the method for circuit board curvature pick-up unit shown in Figure 3 according to the present invention.In step S402, optical transmitting set Tx is 310 transmitting terminal incident one light in the optical conductor unit.Then at step S404, optical receiver Rx continues in the optical conductor unit 310 receiving end and detects whether receive this light, maintains the statusquo and does not do reaction if this light detected, does not enter step S406 if this light detected.In step S406, optical receiver Rx can produce alarm signal and notify the user, for example, can be by display unit being set to show the excessive information of flexibility according to alarm signal, or by being set, loudspeaker unit notifies the user to send warning sound according to alarm signal, the damage of avoiding whereby circuit board 300 overbends to cause.When this external cooperation external wireless charging device 330 charges, alarm signal can also be as a kind of charging signals that stops, by the signal transmitter unit, be sent to external wireless charging device 330, the signal receiving unit of external recharging apparatus 330 stops charging signals charge closing mechanism according to what receive again, no longer send the electromagnetic signal that is used for charging, and then reduce unnecessary power consumption.In certain embodiments, wireless charging unit 320 can stop charging signals with transmission according to alarm signal modulation electromagnetic signal, and the wireless charging unit of external recharging apparatus 330 can be according to electromagnetic signal charge closing mechanism after the modulation that receives.Similarly, the method flow of the circuit board curvature pick-up unit that the present invention is shown in Figure 1 also is same as circuit board curvature pick-up unit shown in Figure 3, difference only has two optical conductor unit that detect the different directions flexibility at circuit board curvature pick-up unit shown in Figure 1 and carries out respectively above-mentioned flow process, therefore repeats no more.
Though the present invention has narrated preferred embodiment as above, should be appreciated that above-mentioned the announcement is not to limit the embodiment of the present invention.On the contrary, it contains multiple variation and similar configuration (those of ordinary skills can obviously learn).In addition, should do the deciphering of broad sense to comprise all above-mentioned variations and similar configuration according to appended claim.
Claims (19)
1. circuit board curvature pick-up unit comprises:
One circuit board;
One optical conductor unit is arranged at the foregoing circuit plate, and has a transmitting terminal and a receiving end;
One optical transmitting set is used to above-mentioned transmitting terminal emission one light; And
One optical receiver detects above-mentioned receiving end and whether receives above-mentioned light, when not receiving above-mentioned light, produces an alarm signal;
Wherein when a flexibility of circuit board surpasses a critical bends angle, above-mentioned optical conductor unit can't transmit above-mentioned light.
2. circuit board curvature pick-up unit as claimed in claim 1, wherein above-mentioned optical conductor unit is along with the foregoing circuit plate is crooked.
3. circuit board curvature pick-up unit as claimed in claim 1, above-mentioned optical conductor unit wherein, has one first smooth medium, one second smooth medium, the above-mentioned first smooth medium, has one first optical index, and the second smooth medium, has one second optical index, and above-mentioned the first optical index is greater than above-mentioned the second optical index, when the above-mentioned flexibility of foregoing circuit plate during less than above-mentioned critical bends angle, above-mentioned light is in the above-mentioned first smooth medium, a boundary reflection by the above-mentioned first smooth medium and above-mentioned the second smooth medium advances, to conduct to above-mentioned receiving end from above-mentioned transmitting terminal, and when the above-mentioned flexibility of foregoing circuit plate during greater than above-mentioned critical bends angle, above-mentioned light is in above-mentioned interfacial refraction, to penetrate the above-mentioned second smooth medium.
4. circuit board curvature pick-up unit as claimed in claim 3, wherein above-mentioned critical bends angle determines according to above-mentioned the first optical index and above-mentioned the second optical index.
5. circuit board curvature pick-up unit as claimed in claim 3, above-mentioned optical conductor unit also comprises a curved section, have one the 3rd smooth medium and one the 4th smooth medium, when the above-mentioned flexibility of foregoing circuit plate during less than above-mentioned critical bends angle, above-mentioned light is in the above-mentioned the 3rd smooth medium, a crooked interface reflection by the above-mentioned the 3rd smooth medium and above-mentioned the 4th smooth medium is advanced, and when the above-mentioned flexibility of foregoing circuit plate during greater than above-mentioned critical bends angle, above-mentioned light reflects in above-mentioned curved interface, to penetrate the above-mentioned the 4th smooth medium.
6. circuit board curvature pick-up unit as claimed in claim 1, wherein above-mentioned critical bends angle determines according to a wavelength of above-mentioned light.
7. circuit board curvature pick-up unit as claimed in claim 1, wherein above-mentioned critical bends angle determines according to the incident angle of above-mentioned light with respect to above-mentioned interface.
8. circuit board curvature pick-up unit as claimed in claim 1, also comprise a wireless charging unit, receive an electromagnetic signal of an external wireless charging device to provide power supply to above-mentioned circuit board, wherein, above-mentioned wireless charging unit transmits one according to above-mentioned alarm signal and stops charging signals to above-mentioned external wireless charging device, when the said external charging device receives the above-mentioned charging signals that stops, stopping sending above-mentioned electromagnetic signal.
9. circuit board curvature pick-up unit as claimed in claim 1, wherein above-mentioned light is an infrared ray.
10. circuit board curvature pick-up unit as claimed in claim 1, also comprise a display unit, shows a warning message according to above-mentioned alarm signal.
11. a circuit board curvature detection method comprises:
One optical conductor unit to a circuit board is set;
Transmitting terminal emission one light in above-mentioned optical conductor unit; And
Whether a receiving end that detects above-mentioned optical conductor unit receives above-mentioned light, when not receiving above-mentioned light, produces an alarm signal;
Wherein when a flexibility of circuit board surpasses a critical bends angle, above-mentioned optical conductor unit can't transmit above-mentioned light.
12. circuit board curvature detection method as claimed in claim 11, wherein above-mentioned optical conductor unit is along with the foregoing circuit plate is crooked.
13. circuit board curvature detection method as claimed in claim 11, above-mentioned optical conductor unit wherein, has one first smooth medium, one second smooth medium, the above-mentioned first smooth medium, has one first optical index, and the second smooth medium, has one second optical index, and above-mentioned the first optical index is greater than above-mentioned the second optical index, when the above-mentioned flexibility of foregoing circuit plate during less than above-mentioned critical bends angle, above-mentioned light is in the above-mentioned first smooth medium, a boundary reflection by the above-mentioned first smooth medium and above-mentioned the second smooth medium advances, to conduct to above-mentioned receiving end from above-mentioned transmitting terminal, and when the above-mentioned flexibility of foregoing circuit plate during greater than above-mentioned critical bends angle, above-mentioned light is in above-mentioned interfacial refraction, to penetrate the above-mentioned second smooth medium.
14. circuit board curvature detection method as claimed in claim 13 comprises that also above-mentioned the first optical index of adjustment and above-mentioned the second optical index are to determine above-mentioned critical bends angle.
15. circuit board curvature detection method as claimed in claim 13, above-mentioned optical conductor unit also comprises a curved section, have one the 3rd smooth medium and one the 4th smooth medium, when the above-mentioned flexibility of foregoing circuit plate during less than above-mentioned critical bends angle, above-mentioned light is in the above-mentioned the 3rd smooth medium, a crooked interface reflection by the above-mentioned the 3rd smooth medium and above-mentioned the 4th smooth medium is advanced, and when the above-mentioned flexibility of foregoing circuit plate during greater than above-mentioned critical bends angle, above-mentioned light reflects in above-mentioned curved interface, to penetrate the above-mentioned the 4th smooth medium.
16. circuit board curvature detection method as claimed in claim 11 comprises that also a wavelength of adjusting above-mentioned light is to determine above-mentioned critical bends angle.
17. circuit board curvature detection method as claimed in claim 11, also comprise adjust above-mentioned light with respect to an incident angle of above-mentioned interface to determine above-mentioned critical bends angle.
18. circuit board curvature detection method as claimed in claim 11 also comprises:
Receive an electromagnetic signal of an external wireless charging device to provide power supply to above-mentioned circuit board; And
When above-mentioned receiving end does not receive above-mentioned light, transmit one and stop charging signals to above-mentioned external wireless charging device.
19. circuit board curvature detection method as claimed in claim 11 also comprises according to above-mentioned alarm signal showing that a warning message is in a display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378927.5A CN103134440B (en) | 2011-11-21 | Circuit board curvature detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378927.5A CN103134440B (en) | 2011-11-21 | Circuit board curvature detection device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103134440A true CN103134440A (en) | 2013-06-05 |
| CN103134440B CN103134440B (en) | 2016-11-30 |
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ID=
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105717125A (en) * | 2016-01-28 | 2016-06-29 | 中国矿业大学 | Middle trough connection dumbbell pin breaking detection device and method |
| CN106409148A (en) * | 2015-07-27 | 2017-02-15 | 三星显示有限公司 | Flexible display device |
| CN107934368A (en) * | 2016-10-12 | 2018-04-20 | 神讯电脑(昆山)有限公司 | Track senses feed device |
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| US20080278461A1 (en) * | 2007-04-27 | 2008-11-13 | Christopher Prat | Method for detecting a flexion exerted on a flexible screen and device equipped with such a screen for implementing the method |
| CN102162716A (en) * | 2011-05-19 | 2011-08-24 | 广东成德电路股份有限公司 | Curvature measuring instrument |
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| EP1128318A2 (en) * | 2000-02-21 | 2001-08-29 | Cyberboard A/S | Position detection device |
| CN2449193Y (en) * | 2000-11-23 | 2001-09-19 | 奇普仕股份有限公司 | Machine for checking planeness of circuit board |
| CN2460967Y (en) * | 2001-01-12 | 2001-11-21 | 劲协企业有限公司 | Plate bending testing machine |
| US20080278461A1 (en) * | 2007-04-27 | 2008-11-13 | Christopher Prat | Method for detecting a flexion exerted on a flexible screen and device equipped with such a screen for implementing the method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106409148A (en) * | 2015-07-27 | 2017-02-15 | 三星显示有限公司 | Flexible display device |
| CN106409148B (en) * | 2015-07-27 | 2020-12-01 | 三星显示有限公司 | Flexible display device |
| CN105717125A (en) * | 2016-01-28 | 2016-06-29 | 中国矿业大学 | Middle trough connection dumbbell pin breaking detection device and method |
| CN105717125B (en) * | 2016-01-28 | 2018-05-25 | 中国矿业大学 | A kind of intermediate channel connection dumbbell pin break detector apparatus and method |
| CN107934368A (en) * | 2016-10-12 | 2018-04-20 | 神讯电脑(昆山)有限公司 | Track senses feed device |
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