CN110716670A - Touch sensing system - Google Patents
Touch sensing system Download PDFInfo
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- CN110716670A CN110716670A CN201910852938.9A CN201910852938A CN110716670A CN 110716670 A CN110716670 A CN 110716670A CN 201910852938 A CN201910852938 A CN 201910852938A CN 110716670 A CN110716670 A CN 110716670A
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- light
- transparent substrate
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- side edge
- light module
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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
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
A touch sensing system comprises a transparent substrate, at least one light emitting module and at least one light receiving module, wherein the light emitting module is arranged at the positions of a first side edge and a second side edge, the light emitting module is further provided with at least one first parallel light module and at least one first refraction light module, the light receiving module is arranged at the positions of a third side edge and a fourth side edge, and the light receiving module is further provided with at least one second parallel light module and at least one second refraction light module; the touch transparent substrate can effectively shield the total reflection light of the touch transparent substrate and attenuate the light intensity in the transparent substrate, so that the touch position of the touch transparent substrate is judged by the light receiving part and is transmitted in a total reflection light mode through the transparent substrate, so that the total reflection light of the touch transparent substrate is effectively shielded by an object, and the effect of improving the sensitivity is further achieved.
Description
Technical Field
The present invention relates to a touch sensing system, and more particularly, to a touch sensing system with total reflection light to improve touch sensitivity.
Background
Since the current consumer electronic products are light, thin, short, and small, and the operation mode of the electronic products is the design key point, the related products of the touch technology are increasingly popular, the current touch technology has resistance, ultrasonic, optical, and capacitance types, and the optical touch device has the advantages of lower cost and easier achievement in the large-size touch display field compared with other touch technologies, such as resistance, capacitance, ultrasonic, or projection image type, and the optical touch screen mainly utilizes the principle of light source receiving and intercepting, when light is intercepted, the position where the signal receiver cannot be received can be known, and further the touch accuracy can be determined, and the optical touch screen comprises a glass substrate, a plurality of light emitting elements and a plurality of light receivers, and the light emitting elements and the light receivers are arranged on the upper side of the glass substrate, the light emitting elements and the light receivers are arranged in a one-to-one configuration, so that the purpose of touch control can be achieved through finger shading, but the touch control mode needs large-area shading to effectively control touch, so that the problem of poor touch control sensitivity is caused, and if a small-area stylus is used for touch control, the shading area is limited, so that the problem that effective shading cannot be realized without touch control reaction is caused, the angles of the light rays emitted by the light emitting elements are inconsistent, and the problem of light failure is easily caused.
Therefore, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
The present invention is directed to a touch sensing system, which has the advantage of fully reflecting light to improve touch sensitivity, and solves the above-mentioned technical problems of the conventional optical touch screen in the background art.
The technical scheme of the invention is as follows:
a touch sensing system comprises a transparent substrate, a first side edge and a second side edge which are adjacent to each other, a third side edge and a fourth side edge, wherein the other side edge of the transparent substrate opposite to the first side edge and the other side edge opposite to the second side edge are formed;
the light emitting component is arranged at the positions of the first side edge and the second side edge, and at least one first parallel light module and at least one first refraction light module are arranged between the light emitting component and the first side edge and between the light emitting component and the second side edge;
and the light receiving component is arranged at the positions of the third side and the fourth side.
Furthermore, at least one second parallel light module and at least one second refraction light module are arranged between the light receiving component and the third side and the fourth side.
Further, the first parallel light module and the second parallel light module may be lenses capable of emitting parallel light, such as a convex lens, a biconvex lens, or a fresnel lens.
Further, first refraction light module and second refraction light module are the prism that can jet out refraction light.
Furthermore, the transparent substrate is a glass plate or a plastic plate or an acrylic plate which can be penetrated by infrared rays.
Furthermore, the refractive index n1 of the transparent substrate ranges from 1.3 to 1.9.
Furthermore, the light emitting assembly comprises a plurality of light emitting members, the first parallel light module and the first refraction light module are arranged between the light emitting members and the transparent substrate, the first parallel light module is adjacent to the light emitting members, and the first refraction light module is adjacent to the transparent substrate.
Furthermore, the light receiving assembly comprises a plurality of light receiving parts, the second parallel light module and the second refraction light module are arranged between the light receiving parts and the transparent substrate, the second parallel light module is adjacent to the light emitting parts, and the second refraction light module is adjacent to the transparent substrate.
The invention adopting the technical scheme can bring the following beneficial effects:
the invention provides a touch sensing system, which comprises a transparent substrate, at least one light emitting component and at least one light receiving component, wherein the transparent substrate is provided with a first side edge, a second side edge, a third side edge and a fourth side edge, the first side edge and the second side edge are adjacently arranged, the third side edge is formed at the position of the other side edge of the transparent substrate opposite to the first side edge, the fourth side edge is formed at the position of the other side edge of the transparent substrate opposite to the second side edge, the third side edge and the fourth side edge are adjacently arranged, the light emitting component is arranged at the positions of the first side edge and the second side edge, at least one first parallel light module and at least one first refraction light module are arranged between the light emitting component and the first side edge, and the light receiving component is arranged at the positions of the third side edge and the fourth side edge, therefore, the light generated by the light emitting component is incident into the first parallel light module, the first parallel light module emits approximate parallel light, the parallel light is incident into the first refraction light module, the first refraction light module refracts the light and emits the light into the transparent substrate, so that the transparent substrate is internally provided with total reflection light, when an object touches the transparent substrate, the object can destroy the total reflection light of the transparent substrate, so that the light intensity in the transparent substrate is attenuated, the light receiving part judges the touch position of the transparent substrate, and the light is transmitted in a total reflection light mode through the transparent substrate, so that the object can effectively shield the total reflection light, and the effect of improving the sensitivity is achieved.
Drawings
FIG. 1 is a schematic diagram of a touch sensing system according to the present invention;
FIG. 2 is a partial schematic view of a touch sensing system according to the present invention;
FIG. 3 is a first schematic diagram illustrating an embodiment of a touch sensing system according to the present invention;
fig. 4A to fig. 4E are touch simulation diagrams of angle design of the first refraction light module according to the present invention;
FIG. 5 is a diagram illustrating a light intensity distribution simulation of a single light emitting element according to the present invention;
fig. 6A to 6J are light intensity distribution simulation diagrams of the light receiving element face according to the present invention;
FIG. 7 is a second schematic diagram of an embodiment of a touch sensing system according to the present invention;
FIG. 8 is a partial schematic view of an embodiment of a touch sensing system according to the present invention.
In the figure, 1-touch sensing system, 2-transparent substrate, 21-first side, 22-second side, 23-third side, 24-fourth side, 3-light emitting module, 31-light emitting device, 32-first parallel light module, 33-first refraction light module, 4-light receiving module, 41-light receiving device, 42-second parallel light module, 43-second refraction light module.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description;
fig. 1 and fig. 2 are schematic views and partial schematic views of a touch sensing system according to the present invention, and it can be clearly seen from the drawings that the touch sensing system 1 includes a transparent substrate 2, at least one light emitting device 3 and at least one light receiving device 4. The transparent substrate 2 has an upper plane and a lower plane, and the transparent substrate 2 has a first side 21, a second side 22, a third side 23 and a fourth side 24 at four sides, respectively, wherein the first side 21, the second side 22, the third side 23 and the fourth side 24 are sequentially connected to extend, the third side 23 is formed at the other side of the transparent substrate 2 opposite to the first side 21, the fourth side 24 is formed at the other side of the transparent substrate 2 opposite to the second side 22, the transparent substrate 2 is a glass plate or a plastic plate or an acrylic plate transparent to infrared rays, and the refractive index n1 of the transparent substrate 2 ranges from 1.3 to 1.9.
Wherein the light emitting module 3 is disposed at the first side 21 and the second side 22, the light emitting module 3 includes a plurality of light emitting elements 31, the light emitting elements 31 can be infrared LEDs, at least one first parallel light module 32 and at least one first refraction light module 33 are disposed between the light emitting module 3 and the first side 21 and the second side 22, in this embodiment, the first parallel light module 32 and the first refraction light module 33 are disposed between the light emitting elements 31 and the transparent substrate 2, the first parallel light module 32 is adjacent to the light emitting elements 31, the first refraction light module 33 is adjacent to the transparent substrate 2, the first parallel light module 32 can be a lens capable of emitting parallel light, such as a convex lens, a biconvex lens or a fresnel lens, and the first refraction light module 33 is a prism capable of emitting refraction light, and the angle of the prism may vary according to the refractive index of the transparent substrate 2.
The light receiving element 4 is disposed at the third side 23 and the fourth side 24, and the light receiving element 4 includes a plurality of light receiving elements 41.
Referring to the aforementioned drawings and fig. 3, a first schematic view of the touch sensing system of the present invention is shown, wherein when the touch sensing system 1 performs touch sensing, when the light emitting element 31 is activated and generates a light source, the light of the light emitting element 31 is LED infrared light of 30 degrees, and after the light enters the first parallel light module 32, the first parallel light module 32 converts the light received by the first parallel light module into approximately parallel light and enters the first refraction light module 33, the first refraction light module 33 generates refracted light according to the refraction angle of the received parallel light and enters the transparent substrate 2, and the transparent substrate 2 generates the total reflected light through its own refraction index, so that the refracted light continuously reflects to the light receiving element 41 in a total reflection manner, and the transparent substrate 2 has total reflected light, and when an object such as a finger or a touch pen touches the transparent substrate 2, the finger or the stylus can damage the total reflection light of the transparent substrate 2 to attenuate the light intensity in the transparent substrate 2, and the light receiving part 41 determines the touch position, and transmits the light in a total reflection light mode through the transparent substrate 2, so that the total reflection light is effectively shielded by an object, and the effect of improving the sensitivity is achieved.
Fig. 4A to 4E show touch simulation diagrams of the first refraction light module 33 angle design according to the present invention, wherein the angle design is performed on the first refraction light module 33, and the most ideal design condition is that the light intensity distribution of the total reflection surface is uniform, so that the energy changes from touch to different points are similar, and the light intensity generated by simulation is performed with different touch areas and different positions, and the diffusion surface is the touch area.
Fig. 5 and fig. 6A to 6J are schematic diagrams showing a light intensity distribution of the single light emitting device 31 and a light intensity distribution of the light receiving device 41, in which after infrared light of the single light emitting device 31 is incident into the first parallel light module 32, the first parallel light module 32 converts the received light into approximately parallel light and emits the light into the first refraction light module 33, the first refraction light module 33 refracts the received parallel light according to the refraction angle to generate a light intensity distribution, and the light intensity distribution of the receiving surface at the position of the light receiving device 41 is schematic diagrams as shown in fig. 6A to 6J, and the diffusion surface is a touch area.
Referring to the aforementioned drawings, as well as fig. 7 and 8, a second schematic diagram and a partial schematic diagram of an implementation of the touch sensing system according to the present invention are shown, wherein at least one second parallel light module 42 and at least one second refraction light module 43 are disposed between the light receiving element 4 and the third side 23 and the fourth side 24, the second parallel light module 42 and the second refraction light module 43 are disposed between the light receiving element 41 and the transparent substrate 2, the second parallel light module 42 is adjacent to the light receiving element 41, and the second refraction light module 43 is adjacent to the transparent substrate 2, the second parallel light module 42 may be a lens capable of emitting parallel light, such as a convex lens, a lenticular lens, or a fresnel lens, the second refraction light module 43 may be a prism capable of emitting refracted light, and an angle of the prism may be changed according to a refractive index of the transparent substrate 2, when the light emitting element 31 is turned on and generates a light source, after the infrared light beam enters the first parallel light module 32, the first parallel light module 32 converts the received light beam into an approximately parallel light beam and emits the approximately parallel light beam into the first refraction light module 33, the first refraction light module 33 refracts the received parallel light beam according to the refraction angle and emits the refracted light beam into the transparent substrate 2, the transparent substrate 2 generates the total reflection light beam through the refractive index thereof, so that the refracted light beam is continuously emitted to the second refraction light module 43 in a total reflection manner, the second refraction light module 43 refracts the received reflected light beam according to the refraction angle and emits the refracted light beam into the second parallel light module 42, the second parallel light module 42 converts the received light beam into an approximately parallel light beam and emits the refracted light beam into the light receiving element 41, so that the light receiving element 41 can receive the infrared light beam, when an object such as a finger or a stylus touches the transparent substrate 2, the object will destroy the total reflection light of the transparent substrate 2, so as to attenuate the light intensity in the transparent substrate 2, and the light receiving element 41 determines the touch position, and transmits the light in a total reflection light manner through the transparent substrate 2, so that the object can effectively shield the total reflection light, thereby achieving the effect of improving the sensitivity.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any equivalent replacement and modification made by those skilled in the art without departing from the spirit and scope of the present invention are deemed to fall within the protection scope of the present invention.
Claims (8)
1. A touch sensing system, comprising: the transparent substrate is provided with a first side edge and a second side edge which are adjacent, the other side edge of the transparent substrate opposite to the first side edge is provided with a third side edge, and the other side edge opposite to the second side edge is provided with a fourth side edge;
the light emitting component is arranged at the positions of the first side edge and the second side edge, and at least one first parallel light module and at least one first refraction light module are arranged between the light emitting component and the first side edge and between the light emitting component and the second side edge;
and the light receiving component is arranged at the positions of the third side and the fourth side.
2. The touch sensing system of claim 1, wherein: at least one second parallel light module and at least one second refraction light module are arranged between the light receiving component and the third side and the fourth side.
3. The touch sensing system of claim 2, wherein: the first parallel light module and the second parallel light module can be lenses which can emit parallel light rays, such as convex lenses, biconvex lenses or Fresnel lenses.
4. The touch sensing system of claim 2, wherein: first refraction light module and second refraction light module are the prism that can jet out refraction light.
5. The touch sensing system of claim 1, wherein: the transparent substrate is a glass plate or a plastic plate or an acrylic plate which can be penetrated by infrared rays.
6. The touch sensing system of claim 1, wherein: the refractive index n1 range of the transparent substrate is 1.3-1.9.
7. The touch sensing system of claim 1, wherein: the light emitting assembly comprises a plurality of light emitting pieces, the first parallel light module and the first refraction light module are arranged between the light emitting pieces and the transparent substrate, the first parallel light module is adjacent to the light emitting pieces, and the first refraction light module is adjacent to the transparent substrate.
8. The touch sensing system of claim 2, wherein: the light receiving assembly comprises a plurality of light receiving parts, the second parallel light module and the second refraction light module are arranged between the light receiving parts and the transparent substrate, the second parallel light module is adjacent to the light emitting parts, and the second refraction light module is adjacent to the transparent substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852938.9A CN110716670A (en) | 2019-09-10 | 2019-09-10 | Touch sensing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852938.9A CN110716670A (en) | 2019-09-10 | 2019-09-10 | Touch sensing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110716670A true CN110716670A (en) | 2020-01-21 |
Family
ID=69209745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910852938.9A Withdrawn CN110716670A (en) | 2019-09-10 | 2019-09-10 | Touch sensing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110716670A (en) |
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2019
- 2019-09-10 CN CN201910852938.9A patent/CN110716670A/en not_active Withdrawn
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200121 |
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| WW01 | Invention patent application withdrawn after publication |