CN108700399A - A kind of distance-measuring device, distance measurement method and flexible display apparatus - Google Patents
A kind of distance-measuring device, distance measurement method and flexible display apparatus Download PDFInfo
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- CN108700399A CN108700399A CN201780004651.XA CN201780004651A CN108700399A CN 108700399 A CN108700399 A CN 108700399A CN 201780004651 A CN201780004651 A CN 201780004651A CN 108700399 A CN108700399 A CN 108700399A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- Theoretical Computer Science (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
A kind of distance-measuring device (30), distance measurement method and flexible display apparatus, distance-measuring device (30) is for measuring the distance between the first stretching structure (10) and second stretching structure (20), first stretching structure (10) includes a magnetic track (101), distance-measuring device (30) includes N number of coil (311, 312, ..., 31N), first coil (311) fixation is wrapped on the second stretching structure (20), first coil (311) is N number of coil (311, 312, ..., any of 31N), N is the positive integer more than or equal to 2;Distance-measuring device (30), electromotive force for detecting first coil (311) both ends, when the absolute value of the electromotive force at first coil (311) both ends be N number of coil (311,312 ..., 31N) in maximum value when, the distance between the first stretching structure of location determination (10) and the second stretching structure (20) that are fixed on according to first coil (311) on the second stretching structure (20).Distance-measuring device (30) can the stretching and contraction for measuring flexible display apparatus apart from when, save power consumption, and measurement accuracy can be improved.
Description
Technical field
The present invention relates to display technology fields, and in particular to a kind of distance-measuring device, distance measurement method and flexibility
Display device.
Background technology
Flexible display apparatus (for example, flexible display screen) can be stretched and be shunk according to user demand, and user is facilitated
Use.During the stretching of flexible display apparatus and contraction, the display area of flexible display apparatus can also change.
Therefore, it is necessary to obtain the distance of the stretching of flexible display apparatus and contraction, to show the display size phase with display device
The display picture of adaptation.
The distance for measuring stretching and the contraction of flexible display apparatus at present often uses optical measurement (for example, infrared survey)
Mode, by taking infrared survey as an example, infrared survey needs to increase additional infrared light supply and carries out active measurement, and power consumption is higher, and
And in flexible display apparatus Rapid stretching and contraction, measurement accuracy is difficult to ensure.
Invention content
A kind of distance-measuring device of offer of the embodiment of the present invention, distance measurement method and flexible display apparatus, Ke Yi
Measure flexible display apparatus stretching and contraction apart from when, save power consumption, and measurement accuracy can be improved.
First aspect of the embodiment of the present invention discloses a kind of distance-measuring device, and the distance-measuring device is for measuring first
The distance between stretching structure and the second stretching structure, first stretching structure include a magnetic track, and the distance is surveyed
Amount device includes N number of coil, and first coil fixation is wrapped on second stretching structure, and the first coil is described N number of
Any of coil, N are the positive integer more than or equal to 2;
The distance ranging device, the electromotive force for detecting the first coil both ends, when the first coil both ends
Electromotive force absolute value be N number of coil in maximum value when, be fixed on described second according to the first coil and draw high
The distance between first stretching structure described in location determination in structure and second stretching structure.
Second aspect of the embodiment of the present invention discloses a kind of distance measurement method, is applied to first aspect of embodiment of the present invention institute
The distance-measuring device stated, the distance-measuring device be used for measure between the first stretching structure and the second stretching structure away from
From, the distance-measuring device includes N number of coil, and first coil fixation is wrapped on second stretching structure, and described first
Coil is any of described N number of coil, and N is the positive integer more than or equal to 2;
The method includes:
The distance ranging device detects the electromotive force at N number of coil both ends respectively;
When it is the maximum value in N number of coil to detect the absolute value of electromotive force at the first coil both ends, institute
It states distance ranging device and according to the first coil is fixed on described second and draws high described in location determination in structure first and stretch
The distance between structure and second stretching structure.
The third aspect of the embodiment of the present invention discloses a kind of flexible display apparatus, including flexible display screen, the first stretching structure,
Distance-measuring device described in second stretching structure and first aspect of the embodiment of the present invention.
Distance-measuring device in the embodiment of the present invention can be used for measuring the first stretching structure according to electromagnetic induction principle
The distance between second stretching structure.When occurring stretching between the first stretching structure and the second stretching structure and contractile motion
When, the coil in distance-measuring device will produce induced electromotive force, and distance-measuring device passes through induced electromotive force in measuring coil
Size obtain the distance between current first stretching structure and second stretching structure.Since coil can be sensed sensitively
Induced electromotive force, generation induced electromotive force speed is fast, can improve measurement accuracy;And the embodiment of the present invention is without using power consumption
Device detects the distance between the first stretching structure and the second stretching structure automatically by the induced electromotive force that coil generates, can
To save power consumption.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of structural schematic diagram of distance-measuring device disclosed by the embodiments of the present invention;
Fig. 2 is the structural schematic diagram of another distance-measuring device disclosed by the embodiments of the present invention;
Fig. 3 is a kind of structural schematic diagram of measure loop disclosed by the embodiments of the present invention;
Fig. 4 is a kind of structural representation of relative motion between magnetic track and measure loop disclosed by the embodiments of the present invention
Figure;
Fig. 5 is the structural representation of relative motion between another magnetic track and measure loop disclosed by the embodiments of the present invention
Figure;
Fig. 6 is the structural representation of relative motion between another magnetic track and measure loop disclosed by the embodiments of the present invention
Figure;
Fig. 7 is a kind of structural schematic diagram of magnetic track disclosed by the embodiments of the present invention;
Fig. 8 is the structural schematic diagram of another distance-measuring device disclosed by the embodiments of the present invention;
Fig. 9 is a kind of flow diagram of distance measurement method disclosed by the embodiments of the present invention;
Figure 10 is the flow diagram of another distance measurement method disclosed by the embodiments of the present invention.
Specific implementation mode
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 describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of distance-measuring device of offer of the embodiment of the present invention, distance measurement method and flexible display apparatus, Ke Yi
Measure flexible display apparatus stretching and contraction apart from when, save power consumption, and measurement accuracy can be improved.Individually below into
Row is described in detail.
Referring to Fig. 1, Fig. 1 is a kind of structural schematic diagram of distance-measuring device disclosed by the embodiments of the present invention, such as Fig. 1 institutes
Show, for measuring the distance between the first stretching structure 10 and the second stretching structure 20, first stretches the distance-measuring device 30
Structure 10 includes a magnetic track 101, distance-measuring device 30 include N number of coil (it is as shown in Figure 1 311,312 ...,
31N), the fixation of first coil 311 is wrapped on the second stretching structure 20, and first coil is any of N number of coil, and N is big
In or equal to 2 positive integer;
Distance ranging device 30, the electromotive force for detecting 311 both ends of first coil, when the electricity at 311 both ends of first coil
When the absolute value of kinetic potential is the maximum value in N number of coil, it is fixed on second according to first coil 311 and draws high position in structure 20
Determine the distance between the first stretching structure 10 and the second stretching structure 20.
It should be noted that in Fig. 1 N number of coil (311,312 ..., 31N) be not closing coil, each coil
Including both ends, when being changed by the magnetic flux of some coil, the both ends of the coil will produce induced electromotive force.
Distance-measuring device shown in FIG. 1, for measuring the first stretching structure and the according to the electromagnetic induction principle of coil
The distance between two stretching structures, since coil can sensitively sense induced electromotive force, generation induced electromotive force speed is fast,
Measurement accuracy can be improved;And the embodiment of the present invention is without using power consumption device, the induced electromotive force generated by coil from
Dynamic detection the distance between the first stretching structure and the second stretching structure, can save power consumption.
Referring to Fig. 2, Fig. 2 is the structural schematic diagram of another distance-measuring device disclosed by the embodiments of the present invention, such as Fig. 2
Shown, for measuring the distance between the first stretching structure 10 and the second stretching structure 20, first draws the distance-measuring device 30
It includes 101 Fig. 2 of magnetic track to stretch structure 10, the second stretching structure include the non magnetic guide rail of M items (it is as shown in Figure 2 201,
202 ..., 20M), sliding slot 2011, magnetic track 101 are formed between the first non magnetic guide rail 201 and the second non magnetic guide rail 202
It is slidably connected with sliding slot, the first non magnetic guide rail 201 and the second non magnetic guide rail 202 are arbitrary two in the non magnetic guide rail of M items
Adjacent non magnetic guide rail;M is the positive integer more than or equal to 2.
Distance-measuring device 30 include fixed setting N number of coil (it is as shown in Figure 2 311,312 ..., 31N), with it is N number of
N number of sampling resistor that coil connects one to one (321,322 ..., 32N) and connect one to one with N number of sampling resistor
N number of detector (331,332 ..., 33N), first coil 311 and the first sampling resistor 321 are composed in series the first measure loop
301, first coil 311 is any one in N number of coil, and the first sampling resistor 321 is corresponding with first coil 311, first
Coil 311 detects 331 devices and uses around the first non magnetic guide rail 201, the second non magnetic guide rail 202 and sliding slot 2011, first voltage
In the voltage for detecting 321 both ends of the first sampling resistor, the first detector 331 is corresponding with the first sampling resistor 321.
Wherein, the number of turns of any two coil is identical in N number of coil, the resistance value of any two resistance in N number of sampling resistor
Identical, N is the positive integer more than or equal to 2.
Distance-measuring device 30, the voltage difference for detecting 321 both ends of the first sampling resistor when the first detector 331
Absolute value when being the maximum value in the absolute value of voltage difference that N number of detector detects, according to measure loop with apart from it
Between correspondence, obtain 301 corresponding target range of the first measure loop.
The quantity of detector in Fig. 2 is N number of, in some possibility as number of coils and the quantity of sampling resistor
Realization method in, the quantity of detector can be less than N number of, for example, P (P<N), that is, a detector can have it is multiple
Test side can use a detector to detect multiple coils simultaneously.The usage quantity of detector can be reduced, distance is saved and surveys
Measure the cost of device.
In the embodiment of the present invention, distance-measuring device 30 includes multiple measure loops and multiple detectors, is each detected back
Road is all composed in series by a coil and a sampling resistor, wherein coil and sampling resistor circuit in series, detector
Both ends are separately connected the both ends of sampling resistor.Detector can be voltage detector, the voltage for detecting sampling resistor both ends.
The both ends of detector can also be separately connected the both ends of a coil, be used for the induced electromotive force at detection coil both ends.Detector
Current detector is can also be, for detecting the electric current in measure loop.Multiple measure loops that distance-measuring device 30 includes
What is be preferably provided is identical, to ensure the accuracy of test result, for the coil in each measure loop, needs that phase is arranged
The number of turns together, identical material (for example, being all copper coil), identical diameter, for the sampling electricity in each measure loop
Resistance, is all arranged identical resistance value.Meanwhile all detectors in distance-measuring device 30 need to be set as identical measurement essence
Degree, to ensure the accuracy of measurement result.
N number of coil that distance-measuring device 30 includes generally is wrapped in the two neighboring of the second stretching structure 20 and non magnetic leads
Rail 202 so that the size (area) of each coil is identical, to ensure the accuracy of range measurements.Further, of the invention
Magnetic track 101 in implementation is vertical with the plane where N number of coil that distance-measuring device 30 includes.Preferably, if it is N number of
Coil is the center of circle, and the center of circle of N number of coil is located on the extended line of magnetic track 101;If N number of coil is rectangular, N number of line
The center of circle is located on the extended line of magnetic track 101.Preferably, in order to ensure the reliability of magnetic track 101, magnetic track
101 can be made of permanent magnetism material, i.e., magnetic track 101 can be permanent magnetism guide rail.
Optionally, multiple coils that distance-measuring device 30 includes can with spaced set, be in order to further ensure away from
Accuracy from measurement result.For example, if it is 1 millimeter (mm) that adjacent the distance between two coils, which are arranged,
Measurement error is 1mm, if the distance between two adjacent coils are arranged between 1-5 millimeters (mm), measurement error is
5mm.Certainly, it is equidistantly positioned after coil, can also be convenient for measuring between the first stretching structure 10 and the second stretching structure 20
Relative velocity during the motion.
Multiple measure loops, which are arranged, in distance-measuring device 30 is stretched to accurately measure the first stretching structure 10 and second
The distance between structure 20, it is however generally that, the number for the measure loop that distance-measuring device 30 is arranged is more, range measurements
It is more accurate.For example, if it is 1 millimeter (mm) that the distance between two adjacent measure loops, which are arranged, measurement error is
1mm, if it is 2 millimeters (mm), measurement error 2mm that the distance between two adjacent measure loops, which are arranged,.
Optionally, the first stretching structure 10 further includes a plurality of non magnetic guide rail (as shown in Figure 2 102,103 etc.).The
The a plurality of non magnetic guide rail that one stretching structure 10 includes can play the role of supporting flexible display apparatus, simultaneously as this is more
The non magnetic guide rail of item will not cause electromagnetic interference to magnetic track 101, may further ensure that distance-measuring device without magnetism
30 measurement result accuracy.
The operation principle of the embodiment of the present invention is illustrated with reference to Fig. 3.It is disclosed specifically, Fig. 3 is the embodiment of the present invention
A kind of measure loop structural schematic diagram, as shown in figure 3, Fig. 3 is illustrated by taking the first measure loop as an example.In Fig. 3
One measure loop 301 includes first coil 311 and the first sampling resistor 32, and first coil 311 and the first sampling resistor 321 are gone here and there
Connection, the first detector 331 is in parallel with the first sampling resistor 321, and the both ends of the first detector 331 are separately connected the first sampling resistor
321 both ends, the first detector 331 are used to detect the voltage difference at 321 both ends of the first sampling resistor.It is understood that the
The voltage difference at one sampling resistor, 321 both ends is the induced electromotive force that first coil 311 generates.As shown in figure 3, if definition
The voltage difference at 321 both ends of the first sampling resistor is the voltage difference of the right end 3212 and left end 3211 of the first sampling resistor 321,
Define the voltage difference of right end 3112 and left end 3111 that the induced electromotive force that first coil 311 generates is first coil 311.With
For Fig. 3, it is that vertical paper is outside to pass through the magnetic line of force direction of first coil 311, when the magnetic flux increasing across first coil 311
Added-time, the voltage of the right end 3112 of first coil 311 are higher than the voltage of left end 3111, the induction electric that first coil 311 generates
Gesture is positive value;The voltage of the right end 3212 of first sampling resistor 321 is higher than the voltage of left end 3211, the first sampling resistor 321
The voltage difference of right end 3212 and left end 3211 is positive value.When the magnetic flux reduction across first coil 311, first coil
The voltage of 311 right end 3112 is less than the voltage of left end 3111, and the induced electromotive force that first coil 311 generates is negative value;First
The voltage of the right end 3212 of sampling resistor 321 is higher than the voltage of left end 3211, the right end 3212 and left end of the first sampling resistor 321
3211 voltage difference is negative value.
When the first stretching structure 10 and the second 20 relative motion of stretching structure, according to Faraday's electromagnetic induction law E=-
N ΔΦs/Δ t, it is seen then that the induced electromotive force that first coil 311 generates is directly proportional to the number of turns of first coil 311, with First Line
The change rate of magnetic flux in circle 311 is directly proportional.If the first detector 331 detects the electricity at 321 both ends of the first sampling resistor
When the absolute value of pressure difference is the maximum value in the absolute value for the voltage difference that N number of detector detects, since the present invention is implemented
The number of turns of all coils in example is identical, determines that the change rate of the magnetic flux in the first measure loop 301 is maximum.It is stretched first
When structure 10 and the second 20 relative motion of stretching structure, the change rate of the magnetic flux in each measure loop is not all the same.When
One stretching structure 10 and the timing of 20 relative velocity of the second stretching structure one, the variable quantity of the magnetic flux in measure loop and the detection
The position that circuit is presently in is closely related.As shown in figure 4, in (a) in Fig. 4, magnetic track 101 and the first measure loop
301 distance farther out when, the variable quantity of the magnetic flux in the first measure loop 301 is smaller;In (b) in Fig. 4, magnetic track
101 it is closer at a distance from the first measure loop 301 when, the variable quantity of the magnetic flux in the first measure loop 301 is larger;In Fig. 4
In (c) in, when magnetic track 101 passes completely through the first measure loop 301, the change of the magnetic flux in the first measure loop 301
Change amount is smaller, and when magnetic track 101 is closer at a distance from the second measure loop 302 at this time, in the second measure loop 302
The variable quantity of magnetic flux is larger.As it can be seen that can judge that magnetism is led by the size of the voltage difference at detection sampling resistor both ends
The distance between rail 101 and measure loop, since each measure loop is to be fixedly installed, between any two measure loop
Distance be all to determine, and then can determine the distance between the first stretching structure and the second stretching structure.
When the first stretching structure 10 and opposing stationary the second stretching structure 20, all samplings in distance-measuring device 30
The voltage difference at resistance both ends is zero.At this point, the distance that distance-measuring device 30 measures last time is stretched as current first
Structure 10 is at a distance from the second stretching structure 20.
Optionally, distance-measuring device 30 are additionally operable to detect 321 both ends of the first sampling resistor when the first detector 331
Voltage difference when being not zero, determine that the first stretching structure 10 and the second stretching structure 20 are relative motion state.
Optionally, as shown in figure 5, magnetic track 101 close to one end of sliding slot 2011 is the arctic (N), magnetic track 101 is remote
One end from sliding slot 2011 is the South Pole (S).At this point, as shown in (a) in Fig. 5, when the first detector 331 detects the first sampling
When the voltage difference at 321 both ends of resistance is negative value, distance-measuring device 30 determines the first stretching structure 10 and the second stretching structure
20 is motion states backwards, the pulling action that the first stretching structure 10 and the second stretching structure 20 are located remotely from each other at this time.
As shown in (b) in Fig. 5, when the first detector 331 detects the voltage difference at 321 both ends of the first sampling resistor
When absolute value is positive value, distance-measuring device 30 determines that the first stretching structure 10 and the second stretching structure 20 are to move toward one another shape
State, the first stretching structure 10 and the second stretching structure 20 carry out contractive action close to each other at this time.
Optionally, as shown in fig. 6, magnetic track 101 close to one end of sliding slot 2011 be the arctic (N) the South Pole (S), magnetism is led
The one end of rail 101 far from sliding slot 2011 is the arctic (N).At this point, as shown in (a) in Fig. 6, when the first detector 331 detects
When the absolute value of the voltage difference at 321 both ends of the first sampling resistor is negative value, distance-measuring device 30 determines the first stretching structure
10 and second stretching structure 20 be move toward one another state, at this time the first stretching structure 10 and the second stretching structure 20 carry out mutually far
From contractive action.
As shown in (b) in Fig. 6, when the first detector 331 detects the voltage difference at 321 both ends of the first sampling resistor
When absolute value is positive value, distance-measuring device 30 determines that the first stretching structure 10 and the second stretching structure 20 are backwards to movement shape
State, the first stretching structure 10 and the second stretching structure 20 carry out pulling action close to each other at this time.
Fig. 5 is corresponding with the both ends of the first sampling resistor 321 in the both ends of the first sampling resistor 321 in Fig. 6 and Fig. 3
's.
Wherein, the correspondence between measure loop and distance can be stored in advance in the memory of distance-measuring device 30
In (for example, nonvolatile memory).Table 1 is please referred to, table 1 is between measure loop disclosed by the embodiments of the present invention and distance
Mapping table.
Table 1
In conjunction with Fig. 1 and table 1 as can be seen that when detecting that (the first measure loop 301 includes first to the first measure loop 301
First sampling resistor 321 of 311 sum of coil) in the first sampling resistor 321 voltage difference maximum absolute value when, can be true
Fixed the distance between first stretching structure 10 and the second stretching structure 20 are 7 centimetres (cm);When detecting the second measure loop 302
The voltage difference of the second sampling resistor 322 in (the second measure loop 302 includes the second coil 312 and the second sampling resistor 322)
When the maximum absolute value of value, it may be determined that the distance between the first stretching structure 10 and the second stretching structure 20 are 6 centimetres (cm);
Etc..
Optionally, as shown in figure 3, the first detector 331, is additionally operable to the induced electromotive force that detection first coil 311 generates.
Distance-measuring device 30 is additionally operable to detect the induced electromotive force that first coil 311 generates when the first detector 331
Absolute value when being not zero, determine that the first stretching structure 10 and the second stretching structure 20 are relative motion state.
If magnetic track is the arctic (N) close to one end of sliding slot, the one end of magnetic track far from sliding slot is the South Pole (S);
Distance-measuring device 30 determines the first stretching structure 10 and the second stretching structure 20 is relative motion state, specially:
When the first detector 311 detects that the absolute value for the induced electromotive force that first coil 311 generates is negative value, distance
Measuring device 30 determines that the first stretching structure 10 and the second stretching structure 20 are backwards to motion state;
When the first detector 311 detects that the absolute value for the induced electromotive force that first coil 311 generates is positive value, distance
Measuring device 30 determines that the first stretching structure 10 and the second stretching structure 20 are to move toward one another state.
Optionally, if magnetic track close to one end of sliding slot be the South Pole (S), the one end of magnetic track far from sliding slot be north
Pole (N);Distance-measuring device 30 determines the first stretching structure 10 and the second stretching structure 20 is relative motion state, specially:
When the first detector 311 detects that the absolute value for the induced electromotive force that first coil 311 generates is negative value, distance
Measuring device 30 determines that the first stretching structure 10 and the second stretching structure 20 are to move toward one another state;
When the first detector 311 detects that the absolute value for the induced electromotive force that first coil 311 generates is positive value, distance
Measuring device 30 determines that the first stretching structure 10 and the second stretching structure 20 are backwards to motion state.
Optionally, referring to Fig. 7, Fig. 7 is a kind of structural schematic diagram of magnetic track disclosed by the embodiments of the present invention, such as scheme
Shown in 7, N number of coil is equidistantly positioned on the first non magnetic guide rail 201 and the second non magnetic guide rail 202.First non magnetic leads
N number of annular groove is placed equidistant on rail 201 and the second non magnetic guide rail 202, N number of annular groove is for winding N number of coil.Such as Fig. 7
It is shown, it is provided with N number of annular groove 2011 in the first non magnetic guide rail 201, N number of ring is provided on the second non magnetic guide rail 202
Shape slot 2021.
Optionally, annular groove can fix the groove replacement of wound around coil with others.
It is placed equidistant with N number of annular groove on the first non magnetic guide rail 201 and the second non magnetic guide rail 202, can be passed through
The position of annular groove fixed coil prevents the first non magnetic guide rail 201 and the second non magnetic guide rail 202 coil during the motion
Position changes, and then influences the accuracy of measurement result.
Optionally, as shown in figure 8, Fig. 8 is the structural representation of another distance-measuring device disclosed by the embodiments of the present invention
Figure.As shown in figure 8, distance-measuring device 30 in addition to include N number of measure loop (it is as shown in Figure 8 301,302 ..., 30N), N
A detector (it is as shown in Figure 8 331,332 ..., 33N) except, distance-measuring device 30 further includes processor 34 and memory
35, memory 35 be used for store measure loop and distance between correspondence, processor 34 be used for according to measure loop with away from
Correspondence between obtains the corresponding target range of the first measure loop.
Distance-measuring device during the present invention is implemented is applied not only to measure between the first stretching structure and the second stretching structure
Distance, can also be applied to it is any with guide rail coordinate structure in, in any result with the cooperation that is slidably connected.This hair
Bright embodiment not limits.
Referring to Fig. 9, Fig. 9 is a kind of flow diagram of distance measurement method disclosed by the embodiments of the present invention, shown in Fig. 9
Method be applied to device shown in FIG. 1, as shown in figure 9, this method comprises the following steps.
901, distance ranging device detects the electromotive force at N number of coil both ends respectively.
902, when it is the maximum value in N number of coil to detect the absolute value of electromotive force at first coil both ends, distance is surveyed
Away from device according to first coil be fixed on second draw high the first stretching structure of location determination in structure and the second stretching structure it
Between distance.
Optionally, this method further includes following steps:
Optionally, this method can also be estimated by repeatedly measuring between the first drafting results and the second drafting results
Relative velocity.
In the embodiment of the present invention, knot is stretched for measuring the first stretching structure and second according to the electromagnetic induction principle of coil
The distance between structure, since coil can sensitively sense induced electromotive force, generation induced electromotive force speed is fast, can improve
Measurement accuracy;And the embodiment of the present invention is without using power consumption device, the induced electromotive force generated by coil detection the automatically
The distance between one stretching structure and the second stretching structure can save power consumption.
Referring to Fig. 10, Figure 10 is the flow diagram of another distance measurement method disclosed by the embodiments of the present invention, figure
Method shown in 10 is applied to device shown in Fig. 2, and as shown in Figure 10, this method comprises the following steps.
1001, distance-measuring device detects the voltage difference at N number of sampling resistor both ends respectively.
1002, when the first detector detects that the absolute value of the voltage difference at the first sampling resistor both ends is N number of sampling electricity
When hindering the maximum value in the absolute value of the voltage difference at both ends, distance-measuring device is according to corresponding between measure loop and distance
Relationship obtains the corresponding target range of the first measure loop.
In the embodiment of the present invention, distance-measuring device can detect N number of sampling resistor both ends respectively by N number of detector
Voltage difference.When the first detector detects that the absolute value of the voltage difference at the first sampling resistor both ends is N number of sampling resistor two
When maximum value in the absolute value of the voltage difference at end, according to electromagnetic induction principle, show to pass through the first measure loop (packet at this time
Include first coil and the first sampling resistor) magnetic flux change rate it is maximum, and the variation rate of magnetic flux of the first measure loop is most
Big position be it is fixed, can be by the maximum dead reckoning of variation rate of magnetic flux of the first measure loop (i.e. according to detection
Correspondence between circuit and distance) the distance between the first stretching structure and the second stretching structure.
Optionally, this method further includes following steps:
When distance-measuring device detects in N number of sampling resistor that there are the voltage differences at least one sampling resistor both ends not
When being zero, determine that counter motion occurs for the first stretching structure and the second stretching structure.Wherein, counter motion include relative motion and
Backwards to movement.
Optionally, this method can also be estimated by repeatedly measuring between the first drafting results and the second drafting results
Relative velocity.
The embodiment of the invention also discloses a kind of flexible display apparatus, including flexible display screen, the first stretching structure, second
Stretching structure and distance-measuring device.First stretching structure and the second stretching structure are supported for carrying the flexible display screen
The stretching and contraction of the flexible display screen.When extensional motion occurs for the first stretching structure and the second stretching structure, Flexible Displays
Screen can also be unfolded accordingly, and can be in the stretching between the first stretching structure of Flexible Displays screen display and the second stretching structure
Distance.When the first stretching structure and the second stretching structure shrink movement, flexible display screen can also be packed up accordingly, and can
With the contract by distance between the first stretching structure of Flexible Displays screen display and the second stretching structure.In the embodiment of the present invention
Flexible display apparatus, user can stretch and shrink with the second stretching structure to the first stretching structure, realize Flexible Displays
The amplification and diminution of screen, and the stretching between the first stretching structure and the second stretching structure can be accurately detected in real time
Distance or contract by distance improve the user experience that user uses flexible display apparatus.
It is provided for the embodiments of the invention scheme above to be described in detail, specific case used herein is to this
The principle and embodiment of invention is expounded, the explanation of above example is only intended to help understand the present invention method and
Its core concept;Meanwhile for those of ordinary skill in the art, according to the thought of the present invention, in specific implementation mode and answer
With there will be changes in range, in conclusion the content of the present specification should not be construed as limiting the invention.
Claims (16)
1. a kind of distance-measuring device, which is characterized in that the distance-measuring device is for measuring the first stretching structure and second
The distance between stretching structure, first stretching structure include a magnetic track, and the distance-measuring device includes N number of line
Circle, first coil fixation are wrapped on second stretching structure, and the first coil is any of described N number of coil, N
For the positive integer more than or equal to 2;
The distance ranging device, the electromotive force for detecting the first coil both ends, when the electricity at the first coil both ends
When the absolute value of kinetic potential is the maximum value in N number of coil, it is fixed on described second according to the first coil and draws high structure
On location determination described in the distance between the first stretching structure and second stretching structure.
2. distance-measuring device according to claim 1, which is characterized in that second stretching structure includes that M items are non-magnetic
Property guide rail, form sliding slot between the first non magnetic guide rail and the second non magnetic guide rail, the magnetic track is slided with the sliding slot
Connection, the first non magnetic guide rail are adjacent for arbitrary two in the non magnetic guide rail of M items with the described second non magnetic guide rail
Non magnetic guide rail;M is the positive integer more than or equal to 2.
3. distance-measuring device according to claim 2, which is characterized in that the distance-measuring device further include with it is described
N number of sampling resistor that N number of coil is correspondingly connected with and P detector being correspondingly connected with N number of sampling resistor, described first
Coil with the first sampling resistor be composed in series the first measure loop described in the first sampling resistor it is corresponding with the first coil, institute
First coil is stated to be used for around the described first non magnetic guide rail, the second non magnetic guide rail and the sliding slot, the first detector
The voltage at first sampling resistor both ends is detected, first detector is corresponding with first sampling resistor, and P is just whole
Number;
The distance-measuring device is additionally operable to detect the voltage difference at first sampling resistor both ends when first detector
When the absolute value of value is the maximum value in the absolute value of voltage difference that N number of detector detects, according to measure loop with
Correspondence between distance obtains the corresponding target range of first measure loop.
4. distance-measuring device according to claim 3, which is characterized in that the distance-measuring device is additionally operable to work as institute
When stating the first detector and detecting that the absolute value of the voltage difference at first sampling resistor both ends is not zero, described first is determined
Stretching structure is relative motion state with second stretching structure.
5. distance-measuring device according to claim 4, which is characterized in that if the magnetic track is close to the sliding slot
One end be the arctic, the one end of the magnetic track far from the sliding slot be the South Pole;The distance-measuring device determines described
One stretching structure is relative motion state with second stretching structure, specially:
When the voltage difference at first sampling resistor both ends is negative value, the distance-measuring device determines that described first stretches
Structure is backwards to motion state with second stretching structure;
When the voltage difference at first sampling resistor both ends is positive value, the distance-measuring device determines that described first stretches
Structure is to move toward one another state with second stretching structure.
6. distance-measuring device according to claim 4, which is characterized in that if the magnetic track is close to the sliding slot
One end be the South Pole, the one end of the magnetic track far from the sliding slot be the arctic;The distance-measuring device determines described
One stretching structure is relative motion state with second stretching structure, specially:
When the voltage difference at first sampling resistor both ends is negative value, the distance-measuring device determines that described first stretches
Structure is to move toward one another state with second stretching structure;
When the voltage difference at first sampling resistor both ends is positive value, the distance-measuring device determines that described first stretches
Structure is backwards to motion state with second stretching structure.
7. distance-measuring device according to claim 3, which is characterized in that
First detector is additionally operable to detect the induced electromotive force that the first coil generates;
The distance-measuring device is additionally operable to detect the induced electromotive force that the first coil generates when first detector
Absolute value when being not zero, determine that first stretching structure with second stretching structure is relative motion state.
8. distance-measuring device according to claim 7, which is characterized in that if the magnetic track is close to the sliding slot
One end be the arctic, the one end of the magnetic track far from the sliding slot be the South Pole;The distance-measuring device determines described
One stretching structure is relative motion state with second stretching structure, specially:
When the induced electromotive force that the first coil generates is negative value, the distance-measuring device determines that described first stretches knot
Structure is backwards to motion state with second stretching structure;
When the induced electromotive force that the first coil generates is positive value, the distance-measuring device determines that described first stretches knot
Structure is to move toward one another state with second stretching structure.
9. distance-measuring device according to claim 7, which is characterized in that if the magnetic track is close to the sliding slot
One end be the South Pole, the one end of the magnetic track far from the sliding slot be the arctic;The distance-measuring device determines described
One stretching structure is relative motion state with second stretching structure, specially:
When the induced electromotive force that the first coil generates is negative value, the distance-measuring device determines that described first stretches knot
Structure is to move toward one another state with second stretching structure;
When the induced electromotive force that the first coil generates is positive value, the distance-measuring device determines that described first stretches knot
Structure is backwards to motion state with second stretching structure.
10. according to claim 1-9 any one of them distance-measuring devices, which is characterized in that arbitrary two in N number of coil
The number of turns of a coil is identical, and the resistance value of any two resistance is identical in N number of sampling resistor.
11. according to claim 3-10 any one of them distance-measuring devices, which is characterized in that N number of coil is equidistant
Setting is on the described first non magnetic guide rail and the described second non magnetic guide rail.
12. distance-measuring device according to claim 11, which is characterized in that the first non magnetic guide rail and described the
N number of annular groove is placed equidistant on two non magnetic guide rails, N number of annular groove is for winding N number of coil.
13. according to claim 3-12 any one of them distance-measuring devices, which is characterized in that the distance-measuring device is also
Including processor and memory, the memory is used to store the correspondence between measure loop and distance, the processor
For according to the correspondence between the measure loop and distance, obtaining the corresponding target range of first measure loop.
14. a kind of distance measurement method, is applied to claim 1-13 any one of them distance-measuring devices, feature exists
In for measuring the distance between the first stretching structure and the second stretching structure, described first stretches the distance-measuring device
Structure includes a magnetic track, and the distance-measuring device includes N number of coil, and first coil fixation is wrapped in described second and draws
It stretches in structure, the first coil is any of described N number of coil, and N is the positive integer more than or equal to 2;
The method includes:
The distance ranging device detects the electromotive force at N number of coil both ends respectively;
When detect the absolute value of electromotive force at the first coil both ends be N number of coil in maximum value when, it is described away from
Described second is fixed on according to the first coil draw high the first stretching structure described in location determination in structure from range unit
The distance between described second stretching structure.
15. according to the method for claim 14, which is characterized in that when the distance-measuring device detects N number of line
When being not zero there are the electromotive force at least one coil both ends in circle, determines that first stretching structure is stretched with described second and tie
Relative motion occurs for structure.
16. a kind of flexible display apparatus, which is characterized in that including flexible display screen, the first stretching structure, the second stretching structure with
And claim 1-13 any one of them distance-measuring devices.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/091239 WO2019000422A1 (en) | 2017-06-30 | 2017-06-30 | Distance measurement device and method, and flexible display device |
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| Publication Number | Publication Date |
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| CN108700399A true CN108700399A (en) | 2018-10-23 |
| CN108700399B CN108700399B (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201780004651.XA Active CN108700399B (en) | 2017-06-30 | 2017-06-30 | Distance measuring device, distance measuring method and flexible display device |
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| Country | Link |
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| CN (1) | CN108700399B (en) |
| WO (1) | WO2019000422A1 (en) |
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| CN114078427A (en) * | 2021-11-11 | 2022-02-22 | 武汉华星光电半导体显示技术有限公司 | Stretchable display module and control method and detection method thereof |
| CN114828473A (en) * | 2022-03-28 | 2022-07-29 | Oppo广东移动通信有限公司 | Electronic device |
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Also Published As
| Publication number | Publication date |
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| WO2019000422A1 (en) | 2019-01-03 |
| CN108700399B (en) | 2020-10-02 |
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