CN107168591B - Optical touch panel and display device - Google Patents
Optical touch panel and display device Download PDFInfo
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- CN107168591B CN107168591B CN201710543179.9A CN201710543179A CN107168591B CN 107168591 B CN107168591 B CN 107168591B CN 201710543179 A CN201710543179 A CN 201710543179A CN 107168591 B CN107168591 B CN 107168591B
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Abstract
The invention discloses an optical touch panel and a display device, wherein the optical touch panel comprises: a plurality of light touch sensors distributed in an array, each of the plurality of light touch sensors comprising: the device comprises a first polar plate, a second polar plate and a photoinduced deformation material layer, wherein the photoinduced deformation material layer is arranged between the first polar plate and the second polar plate, the first polar plate and the second polar plate are transparent or semitransparent conductive polar plates, and thus, under the irradiation of external specific light, the photoinduced deformation material layer deforms, so that the capacity value between the first polar plate and the second polar plate changes, the current position to be touched is identified according to the capacity value change condition, and the remote touch function of a large-size display screen is realized.
Description
Technical Field
The present invention relates to the field of display touch technologies, and in particular, to an optical touch panel and a display device.
Background
At present, for a small-sized display screen, such as a mobile phone or a tablet computer, a finger and a stylus pen are mainly used for realizing a touch function, but for a large-sized display screen, especially in the fields of commerce, teaching and the like, if a finger or a stylus pen is still used for touch operation, not only can an operator be difficult to control the whole display screen, but also the viewing of the operator and a viewer can be influenced, and thus the demand for remote touch is increased.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide an optical touch panel capable of implementing a large-size display screen remote touch function.
A second object of the invention is to propose a display device.
To achieve the above object, an embodiment of a first aspect of the present invention provides an optical touch panel, including: a plurality of light touch sensors distributed in an array, each of the plurality of light touch sensors comprising: the device comprises a first polar plate, a second polar plate and a photoinduced deformation material layer, wherein the photoinduced deformation material layer is arranged between the first polar plate and the second polar plate, and the first polar plate and the second polar plate are transparent or semitransparent conductive polar plates.
According to the optical touch panel provided by the embodiment of the invention, the photoinduced deformation material layer is arranged between the first polar plate and the second polar plate of each optical touch sensor, so that under the irradiation of specific light, the photoinduced deformation material layer deforms, the capacitance value between the first polar plate and the second polar plate changes, the current touched position is identified according to the capacitance value change condition, and the remote touch function of a large-size display screen is further realized.
According to an embodiment of the present invention, the photo-induced deformation material layer of each photo-touch sensor is a common photo-induced deformation material layer, the common photo-induced deformation material layer covers an area covered by the photo-touch sensor array, the first plates of each photo-touch sensor are independent of each other and located on one side of the common photo-induced deformation material layer, and the second plates of each photo-touch sensor are independent of each other and located on the other side of the common photo-induced deformation material layer.
According to an embodiment of the present invention, the optical touch panel further includes: and the control unit is respectively connected with each of the plurality of light touch sensors and is used for acquiring light touch positions according to the capacitance value change of the light touch sensors.
According to an embodiment of the present invention, the material for making the photo-deformation material layer comprises one or a combination of a photosensitive liquid crystal elastomer, a photosensitive material with photo-induced stress release and a PLZT (Lead lanthanum Zirconate Titanate) ceramic material.
According to an embodiment of the present invention, the transparent or semitransparent conductive plate is made of a material selected from one or a combination of ITO (Indium Tin Oxide), AZO (aluminum doped zinc Oxide ZnO), and FTO (fluorine doped SnO 2).
According to an embodiment of the present invention, the optical touch panel further includes a display module, and the plurality of optical touch sensors are disposed on a light emitting side of the display module.
According to an embodiment of the invention, the display module comprises a plurality of pixel units, a non-display area is arranged among the pixel units, and the plurality of light touch sensors are arranged at positions corresponding to the non-display area on the light emitting side of the display module.
According to an embodiment of the present invention, the optical touch panel further includes: the touch sensor is arranged on the light incident side of the plurality of light touch sensors and connected with the control unit, the touch sensor outputs a touch signal under the action of external pressure, and the control unit acquires a pressure touch position according to the touch signal.
According to one embodiment of the invention, the touch sensor is a mutual capacitance sensor or a resistive sensor.
According to an embodiment of the present invention, the optical touch panel further includes a polarizer, and the polarizer is located between the touch sensor and the plurality of optical touch sensors.
In order to achieve the above object, a second embodiment of the invention provides a display device, which includes the optical touch panel.
According to the display device provided by the embodiment of the invention, the remote touch function of the large-size display screen can be realized through the optical touch panel.
Drawings
Fig. 1 is a schematic structural diagram of an optical touch panel according to an embodiment of the invention;
FIG. 2 is a schematic view of a distribution of a plurality of light touch sensors according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the structure of each of the light touch sensors according to an embodiment of the invention;
FIG. 4 is a photo-deformable film structure;
FIG. 5 is a schematic structural diagram of an optical touch panel according to an embodiment of the invention; and
fig. 6 is a block schematic diagram of a display device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An optical touch panel and a display device proposed according to an embodiment of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an optical touch panel according to an embodiment of the present invention, fig. 2 is a schematic distribution diagram of a plurality of optical touch sensors according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of each optical touch sensor according to an embodiment of the present invention.
As shown in fig. 1 to 3, the optical touch panel according to the embodiment of the present invention may include: the plurality of light touch sensors, such as the light touch sensor 11, the light touch sensor 12, the light touch sensor 13, …, are distributed in an array manner, and each light touch sensor of the plurality of light touch sensors includes a first polar plate a1, a second polar plate a2 and a photo-deformation material layer B, the photo-deformation material layer B is disposed between the first polar plate a1 and the second polar plate a2, and the first polar plate a1 and the second polar plate a2 are transparent or semitransparent conductive polar plates.
According to an embodiment of the present invention, the optical touch panel may further include: and a control unit (not specifically shown in the figure), which is respectively connected with each of the plurality of light touch sensors, and is used for acquiring the light touch position according to the capacitance value change of the light touch sensors.
It should be noted that the optical touch panel in the embodiment of the present invention refers to a function of implementing remote touch under the irradiation of external specific light, for example, implementing touch on a display screen through laser irradiation. The optical touch sensor may also be called a light sensor, and specifically means that an output signal of the optical touch sensor changes under the irradiation of external specific light.
Specifically, the light energy is an energy source with high safety, good remote controllability and instant action. Compared with other driving modes such as electricity, heat, magnetism and the like, the optical driving mode has the advantages of easiness in control, low energy consumption, capability of avoiding electromagnetic interference and the like, and the magnitude of the driving force can be controlled by applying light sources with different wavelengths or illumination intensities.
The photoinduced deformation material is a novel functional material, and when the material is irradiated by light (such as laser) with specific wavelength and certain intensity, photophysical or photochemical effect is generated in the material, so that light energy is converted into mechanical energy to generate telescopic deformation; when the light with specific wavelength and certain intensity disappears, such as in the natural light environment, the deformation of the photoinduced deformation material is recovered. Fig. 4 is a photo-induced deformation film structure, as shown in fig. 4, photo-induced deformation particles are distributed in a transparent elastic substrate, when light with a specific wavelength and a certain intensity is irradiated, the photo-induced deformation particles in an irradiation area convert light energy into mechanical energy, and the transparent elastic substrate is subjected to stretching deformation, so that the film is subjected to stretching deformation; when the light disappears, the film is deformed and recovered, so that accurate and rapid light driving can be realized, and the film has the characteristics of recoverability and repetitive driving. Therefore, in the embodiment of the present invention, the light-induced deformation material is used to realize the remote non-contact touch control of the display screen under the action of the light (such as laser) with a specific wavelength and a certain intensity.
Specifically, in order to realize the remote touch control of the display screen, a plurality of optical touch sensors can be arranged above (on the light emitting side) the display module 20 of the display screen, the specific number of the optical touch sensors can be set according to the size and the precision requirement of the screen, and the optical touch sensors are distributed in an array mode as shown in fig. 2. Each of the photo-touch sensors includes a first plate a1 and a second plate a2, the first plate a1 and the second plate a2 form a capacitor-like (e.g., parallel plate capacitor) structure, the first plate a1 and the second plate a2 serve as signal receiving and input layers of the photo-touch sensor, the photo-deformation material layer B serves as a dielectric layer of the capacitor, and according to the principle of the capacitor, when the distance between the two plates changes, the capacitance value of the capacitor changes accordingly. Therefore, when the high-energy light beam with the specific wavelength irradiates the photoinduced deformation material layer B, the photoinduced deformation material layer B is subjected to telescopic deformation, the distance between the two electrode plates of the capacitor is changed, the capacitance value of the capacitor is changed accordingly, the touched position can be identified according to the capacitance value change condition of the capacitor, and the remote touch function of the display screen is realized.
At present, there are many materials with the photo-deformation effect, for example, the material for making the photo-deformation material layer B may include one or a combination of a photosensitive liquid crystal elastomer, a photosensitive material with photo-stress release and PLZT ceramic material, for example, it may be a mixture of multiple materials. Moreover, since the plurality of photo sensors are disposed above the display module 20, the first plate a1 and the second plate a2 of the photo sensors are both transparent or semitransparent conductive plates, and the transparent or semitransparent conductive plates are made of one or a combination of ITO, AZO and FTO, for example, a mixture of multiple materials.
Therefore, according to the optical touch panel provided by the embodiment of the invention, the array type optical touch sensors are arranged, and the photoinduced deformation material layer is used as the dielectric layer between the two polar plates of the optical touch sensors, so that when light with specific wavelength and intensity is irradiated, the photoinduced deformation material layer is stretched and deformed, the capacity value between the two polar plates is changed, the optical touch position is identified according to the capacity value change condition, and the remote optical touch function of a large-size display screen is realized. The photoinduced deformation material layer has a special optical-electromechanical coupling effect and an energy conversion mechanism, so that the excitation of light weight and small size can be realized, and the photoinduced deformation material layer needs to be driven by light with specific wavelength and intensity, so that the non-interference non-contact precise and rapid remote optical touch effect under natural illumination can be realized, and the influence of electromagnetic disturbance is avoided in the mechanism. In addition, due to different energy conversion excitation, the photoinduced deformation material layer does not need additional high-voltage or strong magnetic generation equipment.
Further, according to an embodiment of the present invention, as shown in fig. 1, the photo-deformable material layer B of each photo-sensor is a common photo-deformable material layer 10, the common photo-deformable material layer 10 covers an area covered by the entire photo-sensor array, the first plates a1 of each photo-sensor are independent of each other and located on one side of the common photo-deformable material layer 10, and the second plates a2 of each photo-sensor are independent of each other and located on the other side of the common photo-deformable material layer 10.
Specifically, in the embodiment of the present invention, the photo-deformable material layer B of each photo-touch sensor may be independent from each other, or may be integrated with each other, for example, a common photo-deformable material layer 10 may be directly disposed above the display module 20, and the common photo-deformable material layer 10 covers the area covered by the entire photo-touch sensor array, wherein the first plate a1 of each photo-touch sensor is located on one side of the common photo-deformable material layer 10, such as the side close to the display module 20, and the second plate a2 of each photo-touch sensor is located on the other side of the common photo-deformable material layer 10, such as the side far from the display module 20.
In practical design, the first plate a1 of each of the plurality of photo-touch sensors may be disposed above the display module 20 in an array manner, then a layer of common photo-deformable material layer 10 is disposed above the first plates a1 of all the photo-touch sensors, and finally the second plate a2 of each of the plurality of photo-touch sensors is disposed above the common photo-deformable material layer 10, and the first plate a1 and the second plate a2 of each photo-touch sensor are ensured to correspond to each other. Therefore, the complexity of the manufacturing process of the optical touch panel can be effectively reduced.
Further, as shown in fig. 1, the optical touch panel further includes a display module 20, and the plurality of optical touch sensors are disposed on the light emitting side of the display module 20. The display module 20 includes a plurality of pixel units (not specifically shown in the drawings), a non-display area is provided between the pixel units, and the plurality of optical touch sensors are disposed at positions corresponding to the non-display area on the light emitting side of the display module 20, so as to reduce the influence on the transmittance of light emitted by the pixel units.
Further, according to an embodiment of the present invention, as shown in fig. 5, the optical touch panel may further include a touch sensor 60, the touch sensor 60 is disposed on a light incident side of the plurality of optical touch sensors, the touch sensor 60 is connected to the control unit, the touch sensor 60 outputs a touch signal under an external pressure, and the control unit obtains a pressure touch position according to the touch signal. The touch sensor 60 may be a mutual capacitance sensor or a resistance sensor.
Further, as shown in fig. 5, the optical touch panel may further include a polarizer 30, and the polarizer 30 is located between the touch sensor 60 and the plurality of optical touch sensors.
Specifically, when the display screen only includes a remote touch function, as shown in fig. 1, the Optical touch panel may include, from bottom to top (facing a user), a display module 20, a plurality of Optical touch sensors, a polarizer 30, a transparent adhesive 40, and a cover glass 50, wherein the transparent adhesive 40 may be an OCR (Optical Clear Resin) or an OCA (Optical Clear adhesive). When laser irradiates the display screen, the laser penetrates through the cover plate glass 50, the transparent adhesive 40, the polaroid 30 and the second polar plate A2 of the light touch sensor to reach the photoinduced deformation material layer B, the photoinduced deformation material layer B is subjected to telescopic deformation under the laser irradiation, so that the distance between the first polar plate A1 and the second polar plate A2 of the light touch sensor is reduced, according to the capacitor principle, the capacity value of the light touch sensor changes, the control unit can identify the position of the current laser irradiation on the display screen according to the capacity value change condition of the light touch sensor, then the command of the corresponding position is executed according to the identified position, and the remote touch function of the display screen is realized.
When the display screen includes both the remote touch function and the contact touch function, a contact sensor 60 may be disposed between the cover glass 50 and the transparent adhesive 40 of the optical touch panel shown in fig. 1, the contact sensor 60 may be formed by a mutual capacitance type sensor or a resistance type sensor, and may be implemented by using the prior art, which is not described in detail herein, and the contact sensor 60 may implement finger touch or stylus touch of a user, so that the remote and near touch functions are implemented under the action of the plurality of optical touch sensors and the contact sensor 60, and the versatility of the display screen is greatly improved.
In summary, according to the optical touch panel of the embodiment of the invention, the photoinduced deformation material layer is arranged between the first polar plate and the second polar plate of each optical touch sensor, so that under the irradiation of specific light, the photoinduced deformation material layer deforms, and the capacitance value between the first polar plate and the second polar plate changes, so that the currently touched position is identified according to the capacitance value change condition, and the remote touch function of the large-size display screen is further realized.
Fig. 6 is a block schematic diagram of a display device according to an embodiment of the present invention. As shown in fig. 6, the display device 1000 includes the optical touch panel 100.
According to the display device provided by the embodiment of the invention, the remote touch function of the large-size display screen can be realized through the optical touch panel.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An optical touch panel, comprising:
a plurality of light touch sensors distributed in an array, each of the plurality of light touch sensors comprising:
the device comprises a first polar plate, a second polar plate and a photoinduced deformation material layer, wherein the photoinduced deformation material layer is arranged between the first polar plate and the second polar plate, and the first polar plate and the second polar plate are both transparent or semitransparent conductive polar plates;
and the control unit is respectively connected with each of the plurality of light touch sensors and is used for acquiring light touch positions according to the capacitance value change of the light touch sensors.
2. The optical touch panel according to claim 1, wherein the photo-deformable material layer of each of the photo-sensors is a common photo-deformable material layer covering an area covered by the photo-sensor array, the first plates of each of the photo-sensors are independent of each other and located on one side of the common photo-deformable material layer, and the second plates of each of the photo-sensors are independent of each other and located on the other side of the common photo-deformable material layer.
3. The optical touch panel according to claim 1, wherein the material for forming the photo-deformable material layer comprises one or a combination of a photosensitive liquid crystal elastomer, a photosensitive material with photo-induced stress release, and a PLZT ceramic material.
4. The optical touch panel according to claim 1, wherein the transparent or translucent conductive plate is made of a material comprising one or a combination of ITO, AZO, and FTO.
5. The optical touch panel according to any one of claims 1 to 4, further comprising a display module, wherein the plurality of optical touch sensors are disposed on a light emitting side of the display module.
6. The optical touch panel according to claim 5, wherein the display module comprises a plurality of pixel units, a non-display area is provided between the pixel units, and the plurality of photo-touch sensors are disposed at positions corresponding to the non-display area on the light-emitting side of the display module.
7. The optical touch panel according to claim 5, further comprising:
the touch sensor is arranged on the light incident side of the plurality of light touch sensors and connected with the control unit, the touch sensor outputs a touch signal under the action of external pressure, and the control unit acquires a pressure touch position according to the touch signal.
8. The optical touch panel according to claim 7, wherein the touch sensor is a mutual capacitance sensor or a resistance sensor.
9. The optical touch panel of claim 7, further comprising a polarizer located between the touch sensor and the plurality of optical touch sensors.
10. A display device comprising the optical touch panel according to any one of claims 1 to 9.
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| CN201710543179.9A CN107168591B (en) | 2017-07-05 | 2017-07-05 | Optical touch panel and display device |
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| CN201710543179.9A CN107168591B (en) | 2017-07-05 | 2017-07-05 | Optical touch panel and display device |
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| CN107168591A CN107168591A (en) | 2017-09-15 |
| CN107168591B true CN107168591B (en) | 2020-03-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109298799B (en) * | 2017-07-24 | 2020-08-11 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof, display device and method for optically controlling display device |
| CN108258019B (en) | 2018-01-15 | 2021-02-05 | 京东方科技集团股份有限公司 | Flexible controllable OLED display device, manufacturing method and display equipment |
| CN108899353B (en) * | 2018-07-26 | 2021-01-26 | 京东方科技集团股份有限公司 | OLED display substrate, manufacturing method thereof and display device |
| CN112272248B (en) * | 2020-10-26 | 2022-05-20 | Oppo广东移动通信有限公司 | Electronic device with a detachable cover |
| CN112256156B (en) * | 2020-11-17 | 2023-10-13 | 深圳市华星光电半导体显示技术有限公司 | Display device and pressure sensing detection method |
| CN112612381A (en) | 2020-12-29 | 2021-04-06 | 深圳市华星光电半导体显示技术有限公司 | Sensor device and display device |
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| CN1979403A (en) * | 2005-11-30 | 2007-06-13 | 中兴通讯股份有限公司 | Non-contact type touch screen and method for realizing mobile communication terminal by same |
| CN103389581A (en) * | 2012-05-11 | 2013-11-13 | 夏普株式会社 | Laser designator and optical input device |
| CN103995623A (en) * | 2014-05-16 | 2014-08-20 | 北京科技大学 | Non-contact type touch screen control device |
| CN106339144A (en) * | 2016-09-09 | 2017-01-18 | 京东方科技集团股份有限公司 | Laser touch panel, display equipment, display system and laser touch method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6495625B2 (en) * | 2014-11-11 | 2019-04-03 | 株式会社ジャパンディスプレイ | Display device |
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| CN1979403A (en) * | 2005-11-30 | 2007-06-13 | 中兴通讯股份有限公司 | Non-contact type touch screen and method for realizing mobile communication terminal by same |
| CN103389581A (en) * | 2012-05-11 | 2013-11-13 | 夏普株式会社 | Laser designator and optical input device |
| CN103995623A (en) * | 2014-05-16 | 2014-08-20 | 北京科技大学 | Non-contact type touch screen control device |
| CN106339144A (en) * | 2016-09-09 | 2017-01-18 | 京东方科技集团股份有限公司 | Laser touch panel, display equipment, display system and laser touch method |
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