CN108549504B - Touch sensing substrate and touch device - Google Patents
Touch sensing substrate and touch device Download PDFInfo
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- CN108549504B CN108549504B CN201810344088.7A CN201810344088A CN108549504B CN 108549504 B CN108549504 B CN 108549504B CN 201810344088 A CN201810344088 A CN 201810344088A CN 108549504 B CN108549504 B CN 108549504B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
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Abstract
The invention provides a touch sensing substrate and a touch device, wherein the touch sensing substrate comprises a bulge board and an optical fiber net layer which are sequentially stacked; the optical fiber net in the optical fiber net layer is mainly formed by interweaving a plurality of optical fibers arranged along a first direction and a plurality of optical fibers arranged along a second direction, the light inlet end of each optical fiber in the optical fiber net is provided with an optical transmitter, and the light outlet end of each optical fiber in the optical fiber net layer is provided with an optical receiver; and the surface of the bulge board facing the optical fiber net layer is provided with bulges corresponding to the intersection points of the optical fibers in the optical fiber net. The touch sensing substrate and the touch device provided by the invention can realize touch operation by utilizing the principle that the optical fiber deforms when being pressed to cause the signal in the optical receiver to change, and can be suitable for manufacturing large-size flexible display screens.
Description
Technical Field
The invention relates to the technical field of touch sensing, in particular to a touch sensing substrate based on optical fibers and a touch device.
Background
With the development of display technology, flexible display panels (or called flexible display panels) are gradually favored by people due to their features of being light, thin, deformable (e.g. bendable), and good mechanical properties, and the application fields of flexible display panels are becoming more and more extensive, for example, liquid crystal displays, organic electroluminescent displays, electronic paper, electrophoretic displays, touch panels, and the like. Since the flexible display screen is different from the conventional hard screen in terms of substrate materials, packaging materials, an integral multi-layer light-emitting device and the like, the touch technology of the flexible display screen cannot simply duplicate the conventional manner, that is, when the flexible display screen is applied as a touch display screen, particularly for a large-size display screen, due to the characteristic of flexibility of the flexible display screen, clicking and touch operation on the flexible display screen are difficult to realize, thereby limiting the application of the flexible display screen.
Disclosure of Invention
The invention aims to provide a touch sensing substrate and a touch device, which can improve the touch precision.
In order to achieve the above object, the present invention provides a touch sensing substrate, which includes a protrusion board and an optical fiber network layer sequentially stacked; the optical fiber net layer is configured to deform when the touch sensing substrate is pressed, the optical fiber net layer comprises an optical fiber net, the optical fiber net is mainly formed by interweaving a plurality of optical fibers arranged along a first direction and a plurality of optical fibers arranged along a second direction, an optical transmitter is arranged at an optical inlet end of each optical fiber in the optical fiber net, and an optical receiver is arranged at an optical outlet end of each optical fiber; and the surface of the bulge board facing the optical fiber net layer is provided with bulges corresponding to the intersection points of the optical fibers in the optical fiber net.
Optionally, the optical fiber mesh layer includes a first flexible light guide plate and a second flexible light guide plate;
the first flexible light guide plate comprises a first flexible substrate and a plurality of optical fibers arranged along a first direction, wherein the plurality of optical fibers arranged along the first direction are embedded in the first flexible substrate, or are formed on the upper surface of the first flexible substrate, or are formed on the lower surface of the first flexible substrate, or one part of the optical fibers are embedded in the first flexible substrate and the other part of the optical fibers is formed on the upper surface or the lower surface of the first flexible substrate;
the second flexible light guide plate comprises a second flexible substrate and a plurality of optical fibers arranged along a second direction, wherein the plurality of optical fibers arranged along the second direction are embedded in the second flexible substrate, or are formed on the upper surface of the second flexible substrate, or are formed on the lower surface of the second flexible substrate, or one part of the optical fibers are embedded in the second flexible substrate, and the other part of the optical fibers is formed on the upper surface or the lower surface of the second flexible substrate.
Optionally, the optical fiber network layer further includes a flexible substrate, and the optical fiber network is embedded in the flexible substrate, or formed on an upper surface of the flexible substrate, or formed on a lower surface of the flexible substrate, or a part of the optical fiber network is embedded in the flexible substrate and another part of the optical fiber network is formed on the upper surface or the lower surface of the flexible substrate.
Optionally, the optical fiber network layer further includes an adhesive, where the adhesive is filled between optical fibers of the optical fiber network, bonds and fixes adjacent optical fibers, and makes the upper surface and the lower surface of the optical fiber network flat.
Optionally, the optical signal transmitted between the optical transmitter and the optical receiver is infrared light.
Optionally, a plurality of light emitters located at the light incident ends of the optical fibers arranged along the first direction and/or at the light incident ends of the optical fibers arranged along the second direction are formed in an LED light bar manner.
Optionally, the projections on the projection plate are the same shape and size.
Optionally, the protrusions on the protrusion board are in a shape of a polygon cone, a polygon frustum, a cone, a column, a circular truncated cone, or a spherical top.
Optionally, the protrusion plate includes the protrusion and a flexible substrate for carrying the protrusion.
The invention also provides a touch device comprising one of the touch sensing substrates.
Optionally, the touch device is a touch display device, the touch device further includes a display panel, and the display panel is disposed above the optical fiber network layer and/or below the protrusion board, or the protrusion board is the display panel.
Optionally, the touch device is a flexible display device, the display panel is a flexible display panel, and the protrusion board includes the protrusion and a flexible substrate for bearing the protrusion.
Compared with the prior art, the technical scheme of the invention has the following technical effects:
1. the touch control sensing substrate comprises a protrusion plate and an optical fiber net layer which are sequentially stacked, wherein the optical fiber net in the optical fiber net layer can be bent under the action of the protrusion plate protruding and supporting when being touched and pressed, the bending amount can influence the light guiding performance of the optical fibers, so that the touch position and the force for touching and pressing a screen can be determined through the signal change corresponding to the light emitted by each optical fiber, and the corresponding touch control operation can be realized.
2. Because the optical fiber has good light guiding capacity, the electric signal converted from the transmitted optical signal is not easily interfered by too much electric quantity in the external environment, and therefore, compared with the traditional capacitance touch technology and the like, the touch identification precision and stability are higher.
3. Because the optical fiber is soft, when the substrates related to the optical fiber net layer, the projection object plate, the display panel and the like are all flexible substrates, the touch sensing substrate and the touch device can be used for manufacturing a flexible display screen.
4. The touch area can be made large, namely a large-size touch display screen can be realized, and because (1) the optical fiber has good light guiding capacity, corresponding touch operation can be realized; (2) the optical fiber is soft, so that a longer optical fiber length or a larger-area optical fiber network is easy to realize; (3) when the substrates related to the optical fiber net layer, the projection object plate, the display panel and the like are all flexible substrates, the area of the screen manufactured by the flexible substrates is larger;
5. according to the touch sensing substrate and the touch device, due to the fact that the light emitter and the light receiver are arranged, the touched object can be any, complete sealing of a product can be achieved, temperature drift is small, and maintainability is good.
Drawings
Fig. 1 is a schematic top view of a touch sensing substrate according to an embodiment of the invention;
fig. 2 is a schematic cross-sectional view of a touch sensing substrate along line LL' in fig. 1 according to an embodiment of the invention;
fig. 3A and 3B are schematic top views of a first flexible light guide plate and a second flexible light guide plate of a fiber network layer according to an embodiment of the invention;
fig. 4 is a schematic cross-sectional view of an optical fiber web layer according to another embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of an optical fiber web layer according to still another embodiment of the present invention;
FIG. 6 is a schematic top view of a projection plate according to an embodiment of the present invention;
fig. 7 is a schematic view of a usage status of a touch device according to an embodiment of the invention.
Detailed Description
As mentioned in the background art, the flexible display screen (referred to as "flexible screen" for short) has a deformable characteristic, so that the manufacturing process and material thereof are very different from those of the conventional hard screen, and therefore, for the flexible screen, if the touch control methods such as capacitive touch control and infrared touch control adopted by the hard screen are reused, the touch control signal thereof is easily interfered by the electrical quantity of the external environment, resulting in poor touch control effect. Further, most of the existing touch technologies are applied to small-sized hard display screens, and therefore, after the existing touch technologies are directly transferred to large-sized flexible screens, capacitance measurement or infrared light detection is inaccurate due to deformation of the flexible screens under touch pressure, and then clicking and touch operations on the flexible screens may not be realized.
Based on the touch sensing substrate and the touch device, the touch sensing substrate mainly comprises an optical fiber net, an optical transmitter, an optical receiver and a protrusion board, the touch position is determined by the optical fiber net interwoven by optical fibers according to the principle that optical signals change after the optical fibers are bent, the interference of electrical quantity on a touch screen can be reduced due to the good light guiding capacity of the optical fibers, and the touch precision is improved; meanwhile, touch operation on the flexible screen can be realized by utilizing the characteristic that the optical fiber is relatively soft, and the application of the flexible screen is expanded; in addition, because the optical fiber is relatively closed and has better light guiding capability, the area of the touch sensing substrate can be enlarged, and the large-size touch display screen can be manufactured.
The present invention will be described in more detail with reference to the accompanying drawings, which are included to illustrate embodiments of the present invention. In the present invention, the "up" and "down" directions refer to that, with respect to the touch object, the surface facing the touch object is the upper surface, and the surface facing away from the touch object is the lower surface.
Fig. 1 is a schematic top view of a touch sensing substrate according to an embodiment of the invention. Referring to fig. 1, an embodiment of the present invention provides a touch sensing substrate, including a protrusion board 12 and an optical fiber network layer 11 sequentially stacked, where the optical fiber network layer 11 is disposed with an optical fiber network, the optical fiber network layer 11 has a thickness that enables deformation to be generated under a minimum touch pressure, protrusions corresponding to intersections of optical fibers on the optical fiber network are disposed on the protrusion board 12, all the protrusions are in contact with the optical fiber network layer 11, and a height of the protrusions is suitable for providing corresponding support to the optical fiber network layer 11, so that deformation enough for detecting a change of an optical signal can be generated. Specifically, when the touch sensing substrate of this embodiment is pressed, for example, a user performs a touch operation through a finger or a pen or other arbitrary object, that is, a pressing force is generated on the touch sensing substrate, and under the supporting action of the convex points of the convex object plate 12, the optical fiber segment of the optical fiber network layer 11 corresponding to at least one of two protrusions on the convex object plate 12 is bent or stretched to a certain extent, that is, deformed, under the pressing force, so as to change the optical signal transmitted through the whole optical fiber, and determine the coordinates of the touch position by detecting the changed signal, thereby implementing the touch operation.
Fig. 2 is a schematic cross-sectional view of the touch sensing substrate shown in fig. 1 along line LL'. Referring to fig. 1 and 2, the optical fiber network layer 11 includes an optical fiber network (i.e., an optical fiber array) that is formed by interweaving a plurality of optical fibers 111 arranged along a first direction and a plurality of optical fibers 112 arranged along a second direction, and the optical fibers 111 and the optical fibers 112 may or may not be in contact with each other. The first direction and the second direction may intersect perpendicularly, such as the X direction and the Y direction in fig. 1, or may not intersect perpendicularly. The optical fiber network comprises an optical fiber net, wherein the light inlet end of each optical fiber in the optical fiber net is provided with an optical transmitter 13, the light outlet end of each optical fiber in the optical fiber net is provided with an optical receiver 14, the optical transmitter 13 is used for injecting light into the optical fiber, and the optical receiver is used for receiving optical signals conducted from the optical fiber and converting the obtained optical signals into electric signals. Therefore, when an object such as a finger, a pen, etc. presses the touch sensing substrate, the optical fiber mesh layer will bend due to the supporting effect of the protrusion board 12 and the pressing force, the bending will affect the light guiding performance of the corresponding optical fiber, the larger the bending amount is, the weaker the light guiding performance is, the weaker the light intensity received by the optical receiver 14 through the optical fiber is, after the intensity of the light emitted by the optical emitters 13 is preset (the light intensity emitted by all the optical emitters 13 can be made to be the same), the optical signal with a certain intensity is received by the optical receiver 14 corresponding to the optical fiber outlet end, the bent optical fiber will weaken the intensity of the optical signal reaching the corresponding optical receiver 14, so that the intensity of the electrical signal converted by the corresponding optical receiver 14 changes (i.e. the intensity of the electrical signal output by the corresponding optical receiver 14 before and after touch is changed), therefore, the magnitude of the pressing force can be judged according to the strength of the corresponding electrical signal output by the optical receiver 14, and the measurement of the touch pressure is realized; meanwhile, since the light intensity received by the light receiver 14 at the exit end of the optical fiber that is not pressed on the optical fiber network does not change significantly, but only the light intensity received by the light receiver 14 corresponding to the pressed optical fiber changes, the position (e.g., X, Y coordinates) information of the touch point can be obtained through the change of the electrical signal converted by the light receivers 14 in a certain row and a certain column of the optical fiber network.
As a non-limiting example, the optical transmitters 13 for injecting light into the optical fibers 111 arranged in the first direction are all arranged on the same side of the optical fibers 111 (as shown by the white squares in the leftmost column in fig. 1), and the optical receivers 14 for receiving the optical signals conducted by the optical fibers 111 arranged in the first direction are all arranged on the same side of the optical fibers 111 (as shown by the diagonal squares in the rightmost column in fig. 1); similarly, the optical transmitters 13 for injecting light into the optical fibers 112 arranged in the second direction are all arranged on the same side of the optical fibers 112 (as indicated by the white squares in the bottom row in fig. 1), and the optical receivers 14 for receiving optical signals transmitted by the optical fibers 112 arranged in the second direction are all arranged on the same side of the optical fibers 112 (as indicated by the diagonal squares in the top row in fig. 1). The optical transmitter 13 may be an infrared optical transmitter, and correspondingly, the optical receiver 14 may be an infrared receiver such as a photodiode, a phototransistor, or the like, that is, the optical signal transmitted between the pair of optical transmitter 13 and optical receiver 14 disposed at the two ends of each optical fiber is infrared light. In addition, when the light emitters 13 on one side of the optical fiber network layer 11 are arranged on the same straight line, the light emitters 13 may be provided by one LED light bar, that is, a plurality of light emitters 13 located at the light incident ends of the optical fibers 111 arranged in the first direction may be formed by the LED light bar, a plurality of light emitters 13 located at the light incident ends of the optical fibers 112 arranged in the second direction may be formed by the LED light bar, or a plurality of light emitters 13 located at the light incident ends of the optical fibers 111 arranged in the first direction and a plurality of light emitters 13 located at the light incident ends of the optical fibers 112 arranged in the second direction may be formed by the LED light bar.
It should be noted that fig. 2 shows only two directions of optical fibers for the optical fiber mesh layer, which does not mean that the optical fiber mesh layer is only composed of two directions of optical fibers, and may further include a substrate, an interlayer medium, and the like. The specific structure of the optical fiber network layer can be referred to fig. 3A and 3B, fig. 4, and fig. 5.
Referring to fig. 3A and 3B, in an embodiment of the invention, the fiber network layer 11 includes a first flexible light guide plate 110a (i.e., a light guide plate where a plurality of optical fibers 111 arranged along a first direction are located, for example, a light guide plate where a transverse optical fiber array is located) and a second flexible light guide plate 110B (i.e., a light guide plate where a plurality of optical fibers 112 arranged along a second direction are located, for example, a light guide plate where a longitudinal optical fiber array is located), which are stacked, and the first flexible light guide plate 110a may be located above the second flexible light guide plate 110B or below the second flexible light guide plate 110B. The first flexible light guide plate 110a includes a first flexible substrate 111' and a plurality of optical fibers 111 arranged in a first direction. The plurality of optical fibers 111 (e.g., transverse optical fibers) arranged along the first direction may be embedded in the first flexible substrate 111 ', may be formed on the upper surface of the first flexible substrate 111 ', may be formed on the lower surface of the first flexible substrate 111 ', may be partially embedded in the first flexible substrate 111 ', and may be partially formed on the upper surface or the lower surface of the first flexible substrate 111 '. The second flexible light guide plate 110b includes a second flexible substrate 112 'and a plurality of optical fibers 112 (e.g., longitudinal optical fibers) arranged along a second direction, where the plurality of optical fibers 112 arranged along the second direction may be embedded in the second flexible substrate 112', may be formed on an upper surface of the second flexible substrate 112 ', may be formed on a lower surface of the second flexible substrate 112', may be partially embedded in the second flexible substrate 112 ', and may be partially formed on the upper surface or the lower surface of the second flexible substrate 112'. The structure of the optical fiber mesh layer 11 of this embodiment can fix the optical fibers in two directions on two substrates respectively to form corresponding light guide plates, can reduce the manufacturing difficulty of the optical fiber mesh layer 11, and simultaneously improves the mechanical strength of the optical fiber mesh layer itself.
Referring to fig. 4, in another embodiment of the present invention, the optical fiber network layer 11 includes a flexible substrate 110c, a plurality of optical fibers 111 arranged along a first direction, and a plurality of optical fibers 112 arranged along a second direction, the plurality of optical fibers 111 arranged along the first direction are located on a same plane, so as to form an optical fiber array in the first direction, the plurality of optical fibers 112 arranged along the second direction are located on a same plane, so as to form an optical fiber array in the second direction, the optical fiber array in the first direction may be located above the optical fiber array in the second direction, or may be located above the optical fiber array in the second direction, the optical fiber arrays in the two directions are interwoven into an optical fiber network, the optical fiber array in the first direction and the optical fiber array in the second direction may be in contact (the thickness of the touch sensing substrate may be reduced), or may not be in contact (each optical fiber 111 may be in contact with a certain optical fiber 112, or may not contact any of the optical fibers 112, which may reduce manufacturing difficulty while avoiding adverse effects between two manufactured optical fibers). The optical fiber array in the first direction and the optical fiber array in the second direction may be embedded in the flexible substrate 110c, that is, the optical fiber net is embedded in the flexible substrate 110c, as shown in fig. 4. Of course, at least one of the optical fiber array in the first direction and the optical fiber array in the second direction may be formed on an upper surface of the flexible substrate 110c (not shown) or on a lower surface of the flexible substrate 110c (not shown). In the structure of the optical fiber network layer 11 of this embodiment, the material selection and thickness of the flexible substrate 110c can satisfy the requirement that the optical fiber 111 and the optical fiber 112 in the optical fiber network are driven to deform correspondingly when receiving the touch pressing force, and since the optical fiber array in the first direction and the optical fiber array in the second direction are both formed based on one flexible substrate, the thickness of the optical fiber network layer 11 can be reduced, which is beneficial to the manufacture of light and thin equipment.
Referring to fig. 5, in another embodiment of the present invention, the optical fiber mesh layer may include an adhesive 113, a plurality of optical fibers 111 arranged along a first direction, and a plurality of optical fibers 112 arranged along a second direction, the optical fibers 111 arranged along the first direction are located on a same plane to form an optical fiber array in the first direction, the optical fibers 112 arranged along the second direction are located on a same plane to form an optical fiber array in the second direction, the optical fiber array in the first direction may be located above the optical fiber array in the second direction, or above the optical fiber array in the second direction, and the optical fiber arrays in the two directions are interwoven into an optical fiber mesh. The adhesive 113 is filled between the optical fibers of the optical fiber network to bond and fix the adjacent optical fibers, preferably, the adhesive 113 makes the upper surface and the lower surface of the formed optical fiber network layer both planar, at this time, the adhesive 113 may completely wrap the optical fiber arrays in two directions, or may just fill the space between two adjacent optical fibers, as shown in fig. 5, the top surfaces of the adhesive 113 in the optical fiber arrays in each direction are flush with the top surfaces of the optical fibers in the optical fiber arrays. The adhesive 113 is, for example, transparent silicone gel. The optical fiber net layer 11 of the embodiment has strong flexibility and low manufacturing cost, and is beneficial to manufacturing ultrathin and ultra-flexible equipment.
Referring to fig. 2 and 6, the protrusion plate 12 includes a substrate 121 and a plurality of protrusions 122 located on the substrate 121, each protrusion 122 corresponds to an intersection of optical fibers in the optical fiber network layer 11 (i.e. an intersection of one optical fiber 111 in the first direction and one optical fiber 112 in the second direction), in other words, when the touch sensing substrate is pressed by touch, the same protrusion 122 can simultaneously act on two optical fibers at the intersection, and the protrusion 122 can support the optical fiber network layer 11 to a certain height, so that the deformation degree of the optical fibers when the touch is pressed can be increased. The shape and size of the plurality of projections 122 are preferably the same. Each protrusion 122 may be in a shape of a polygon cone, a polygon frustum, a cone, a column, a circular truncated cone, or a spherical top, and protrusions with regular shapes may cause optical fibers to deform regularly, such as bending. Of course, the shape of each protrusion 122 may be a combination of two or more of a polygonal pyramid shape, a polygonal frustum shape, a conical shape, a cylindrical shape, a circular truncated cone shape, or a spherical top shape.
In addition, the substrate 121 may be a flexible substrate. A display panel 15 with pixels can be further stacked on one side of the optical fiber mesh layer 11 away from the protrusion board 12, as shown in fig. 2, the display panel 15 is stacked above the optical fiber mesh layer 11, so that the touch operation is realized, and the definition of a display picture is improved; or, a display panel with pixels is stacked on one side of the protrusion board 12 away from the fiber network layer 11, which is beneficial to improving the touch sensitivity; or, the protrusion board 12 itself is a display panel with protrusions and pixels, which is beneficial to realizing an ultrathin device; further alternatively, a display panel 15 with pixels is stacked on both the side of the optical fiber mesh layer 11 away from the protrusion board 12 and the side of the protrusion board 12 away from the optical fiber mesh layer 11, or a display panel 15 with pixels is stacked on the side of the optical fiber mesh layer 11 away from the protrusion board 12, and the protrusion board 12 itself is a display panel with protrusions and pixels, so as to implement double-sided touch (including front touch and back touch).
Referring to fig. 1, when an object such as a finger presses the touch sensing substrate, the optical fiber in the optical network layer 11 may be bent due to the supporting effect of the protrusion on the protrusion board 12 and the pressing effect of the object, the bending amount may affect the light guiding property of the corresponding optical fiber, the larger the bending amount is, the weaker the light guiding property is, the weaker the light intensity received by the corresponding optical receiver 14 through the bent optical fiber is, the stronger the electric signal output by the corresponding optical receiver 14 is, the strength of the force of the finger physically pressing the screen may be reflected, and the measurement of the touch pressure may be further implemented; meanwhile, since the optical fiber of the non-pressed portion on the touch sensing substrate is kept, the light intensity received by the corresponding optical receiver 14 does not change significantly, but only the light intensity received by the optical receiver 14 corresponding to the pressed optical fiber changes, so that the position information (for example, X, Y coordinate in fig. 1) of the touch contact point can be determined by the change of the electrical signals of the optical receivers 14 connected by two intersecting optical fibers on the optical fiber network (i.e., the change of the electrical signals output by the optical receivers 14 in a certain row and a certain column of the optical fiber array). Therefore, the touch sensing substrate can realize touch position sensing and touch pressure measurement by using the principle of signal change caused by optical fiber microbending, and can be used for manufacturing touch devices such as touch screens and pressure measurement or control devices such as pressure sensors. According to the touch control induction substrate, the optical fiber and the light are used as measuring media, the optical fiber has good light guiding capacity, an electric signal converted from an optical signal transmitted by the optical fiber is not easily interfered by too much electric quantity in an external environment, and the touch control precision is improved; moreover, the optical fiber is soft, so that a longer optical fiber length or a larger-area optical fiber network can be easily realized, when the related substrates such as the optical fiber network layer, the protruding object plate, the display panel and the like are flexible substrates, the touch area can be enlarged, and in addition, due to the self-provided optical emitter and optical receiver, the touched object can be arbitrary, so that the complete sealing of the product can be realized, the temperature drift is smaller, and the maintainability is good.
Based on the same inventive concept, the present invention further provides a touch device, including one of the touch sensing substrates, i.e. referring to fig. 1 and 2, the touch device includes: the optical fiber net comprises a bulge plate 12, an optical fiber net layer 11, an optical transmitter 13 and an optical receiver 14, wherein the bulge plate 12 and the optical fiber net layer 11 are sequentially stacked, and the optical transmitter 13 and the optical receiver 14 are respectively arranged at the inlet end and the outlet end of each optical fiber of the optical fiber net layer 11. The touch device may be a touch display device (i.e., a touch screen), and thus, the touch device further includes a display panel having pixels. The display panel can be stacked on the side of the optical fiber mesh layer 11 away from the protrusion plate 12 (as shown in fig. 2 at 15, the display panel 15 is disposed above the optical fiber mesh layer 11), which is beneficial to improving the definition of the display picture; the display panel can also be stacked on one side of the projection plate 12 far away from the fiber network layer 11, which is beneficial to improving the touch sensitivity; the display panel can also be integrated with the protrusion board 12, that is, the protrusion board 12 itself is a display panel with protrusions and pixels, which is beneficial to realizing an ultrathin device; the number of the display panels may be two, one of the display panels is disposed on one side of the optical fiber network layer 11 away from the protrusion object plate 12, and the other display panel is disposed on one side of the protrusion object plate 12 away from the optical fiber network layer 11 or integrated with the protrusion object plate 12, so as to implement double-sided touch (including front touch and back touch).
The touch device can be a flexible display device such as a flexible screen, and the display panel is a flexible display panel, and the protrusion object plate comprises the protrusion and a flexible substrate for bearing the protrusion. Referring to fig. 7, when the touch device of the present invention is used as a flexible screen, the shape of the flexible screen can be "flexible" (i.e. the flexible screen can be bent or rolled freely on one side or any side).
According to the touch device, the optical fiber and the light are used as measuring media, large-area touch can be achieved, the touched object is optional and can be completely sealed, the touch device is not influenced by external environment light, the temperature drift is small, the interference of the electrical quantity of a screen can be reduced, the touch precision is improved, and the maintainability is good; the optical fiber can be laid in a large area, so that the touch control flexible display screen can be suitable for the flexible display screen with the touch control function.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A touch sensing substrate is characterized by being used for a flexible display screen and comprising a protrusion object plate and an optical fiber net layer which are sequentially stacked;
the optical fiber net layer is configured to deform when the touch sensing substrate is pressed, the optical fiber net layer comprises an optical fiber net, the optical fiber net is formed by interweaving a plurality of optical fibers arranged along a first direction and a plurality of optical fibers arranged along a second direction, an optical transmitter is arranged at an optical inlet end of each optical fiber in the optical fiber net, and an optical receiver is arranged at an optical outlet end of each optical fiber; the optical fiber net layer further comprises an adhesive, and the adhesive is filled between optical fibers of the optical fiber net and used for bonding and fixing the adjacent optical fibers;
and corresponding bulges are arranged on the surface of the bulge board facing the optical fiber net layer only at the intersection points of the optical fibers in the optical fiber net.
2. The touch-sensitive substrate of claim 1, wherein the fiber network layer comprises a first flexible light guide plate and a second flexible light guide plate;
the first flexible light guide plate comprises a first flexible substrate and a plurality of optical fibers arranged along a first direction, wherein the plurality of optical fibers arranged along the first direction are embedded in the first flexible substrate, or are formed on the upper surface of the first flexible substrate, or are formed on the lower surface of the first flexible substrate, or one part of the optical fibers are embedded in the first flexible substrate and the other part of the optical fibers is formed on the upper surface or the lower surface of the first flexible substrate;
the second flexible light guide plate comprises a second flexible substrate and a plurality of optical fibers arranged along a second direction, wherein the plurality of optical fibers arranged along the second direction are embedded in the second flexible substrate, or are formed on the upper surface of the second flexible substrate, or are formed on the lower surface of the second flexible substrate, or one part of the optical fibers are embedded in the second flexible substrate, and the other part of the optical fibers is formed on the upper surface or the lower surface of the second flexible substrate.
3. The touch-sensitive substrate of claim 1, wherein the fiber optic network layer further comprises a flexible substrate, the fiber optic network being embedded in the flexible substrate, or formed on an upper surface of the flexible substrate, or formed on a lower surface of the flexible substrate, or having a portion embedded in the flexible substrate and another portion formed on the upper or lower surface of the flexible substrate.
4. The touch-sensitive substrate of claim 1, wherein the optical signal transmitted between the optical transmitter and the optical receiver is infrared light.
5. The touch-sensing substrate of claim 1 or 4, wherein a plurality of light emitters are formed by LED light bars at the light incident ends of the plurality of optical fibers arranged along the first direction and/or at the light incident ends of the plurality of optical fibers arranged along the second direction.
6. The touch-sensitive substrate of claim 1, wherein the protrusions on the protrusion board are the same shape and size.
7. The touch-sensitive substrate of claim 1, wherein the protrusions on the protrusion board are in the shape of a polygon cone, a polygon frustum, a cone, a cylinder, a truncated cone, or a dome.
8. The touch-sensitive substrate of claim 1, wherein the bump sheet comprises the bumps and a flexible substrate for carrying the bumps.
9. A touch device, wherein the touch device is a flexible display device and comprises the touch sensing substrate of any one of claims 1 to 8.
10. The touch device according to claim 9, wherein the touch device is a touch display device, the touch device further comprises a display panel, and the display panel is disposed above the fiber network layer and/or below the protrusion board, or the protrusion board is the display panel.
11. The touch device of claim 10, wherein the display panel is a flexible display panel, and the bump sheet comprises the bumps and a flexible substrate for carrying the bumps.
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| CN201810344088.7A CN108549504B (en) | 2018-04-17 | 2018-04-17 | Touch sensing substrate and touch device |
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| CN201810344088.7A CN108549504B (en) | 2018-04-17 | 2018-04-17 | Touch sensing substrate and touch device |
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| WO2020103128A1 (en) * | 2018-11-23 | 2020-05-28 | 深圳市柔宇科技有限公司 | Touch panel, control method therefor and touch device |
| CN113532705B (en) * | 2021-06-10 | 2023-03-10 | 广东省科学院半导体研究所 | Array type tactile sensor |
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