CN117991929A - Optical touch screen, capacitive touch screen, touch equipment and touch detection method - Google Patents

Abstract

The invention provides an optical touch screen, a capacitive touch screen, touch equipment and a touch detection method. Wherein, optical touch screen structure includes: the touch panel comprises a first touch cover plate, a first optical adhesive layer, a first film switch, a first touch electrode layer and an optical sensing unit. The first touch cover plate, the first optical adhesive layer, the first membrane switch, the first touch electrode layer and the optical sensing unit are sequentially arranged from bottom to top. The capacitive touch screen structure includes: the touch panel comprises a liquid crystal module, a second optical adhesive layer, a second film switch, a third optical adhesive layer, a capacitance sensing structure, a fourth optical adhesive layer and a second touch cover plate. The liquid crystal module, the second optical adhesive layer, the second membrane switch, the third optical adhesive layer, the capacitance sensing structure, the fourth optical adhesive layer and the second touch cover plate are sequentially arranged from bottom to top. The invention can effectively avoid the situation that the touch response is triggered by mistake, thereby greatly improving the anti-interference capability of the touch screen and the touch effectiveness.

Description

Optical touch screen, capacitive touch screen, touch equipment and touch detection method

Technical Field

The invention relates to the field of touch screen structures, in particular to an optical touch screen, a capacitive touch screen, touch equipment and a touch detection method.

Background

Currently, conventional touch technologies mainly relate to optical touch technologies and capacitive touch technologies. For example, a touch screen performing touch detection based on an optical touch technology determines whether a touch event occurs based on whether an optical sensing unit detects that an optical signal is blocked. Touch screens that perform touch detection based on capacitive touch technology determine whether a touch event has occurred based on the capacitive sensing structure detecting whether the electric field between the two electrodes of the capacitor has changed. However, whichever type of touch screen is used, the detection result of the touch sensing unit is relied on to determine whether to trigger a touch response.

However, in the actual use process, if the user does not touch the touch screen, but detects that the optical signal is blocked, the touch response is triggered by mistake for the touch screen based on the optical touch technology. For a touch screen based on the capacitive touch technology, if a user does not touch the touch screen, but an object such as water drops or mosquitoes falls on the touch screen, the touch response is triggered by mistake. Therefore, whatever touch screen is used, it is easy to trigger a touch response in the case of non-user use, thereby affecting the user's use experience.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the touch screen structure in the prior art is easy to trigger the touch response by mistake, so that the optical touch screen, the capacitive touch screen, the touch equipment and the touch detection method are provided, the touch response can be triggered under the condition that the use of a user is determined, and the situation that the touch response is triggered by mistake is avoided greatly.

To achieve the above technical object, the present invention provides an optical touch screen structure, including: a first touch cover plate; the first optical adhesive layer is arranged on the first touch cover plate; a first thin film switch including a first conductive film layer and a second conductive film layer; the first conductive film layer is arranged on the first optical adhesive layer, and a first gap is formed between the second conductive film layer and the first conductive film layer; a first touch electrode layer disposed on the second conductive film layer; and the optical sensing unit is arranged on the first touch electrode layer. The invention provides an improved optical touch screen structure, which can trigger touch response when an optical sensing unit detects that an optical signal is blocked and a first film switch is extruded by external force to be in a closed state, so that the situation that the touch response is triggered by mistake can be effectively avoided, the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

In at least one embodiment of the present invention, the electrode polarity of the first conductive film layer is opposite to the electrode polarity of the second conductive film layer. Based on the improved technical scheme, when the touch screen is extruded by external force, the touch screen can ensure that the contact position of the first conductive film layer and the second conductive film layer is in a closed state, and the closed state can be used for determining an electric signal for triggering touch response, so that the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

In at least one embodiment of the present invention, the first membrane switch further includes: the first isolation structure is arranged in a first gap between the first conductive film layer and the second conductive film layer. Based on the improved technical scheme, the first membrane switch can be ensured to be in the off state when the touch control device is not extruded by external force, and the situation that the touch response is triggered by mistake can be avoided greatly.

In at least one embodiment of the present invention, the first isolation structure includes a plurality of first insulation bump structures uniformly distributed. Based on the improved technical scheme, the invention can control whether the membrane switch is closed or not according to the stress state of the membrane switch, thereby effectively guaranteeing the improvement of the anti-interference capability of the touch screen and avoiding the occurrence of the condition that the touch response is triggered by mistake.

In at least one embodiment of the present invention, the size of the first insulating bump structures is less than 50um by 50um, and the distance between two adjacent first insulating bump structures is 5mm by 5mm. Based on the improved technical scheme, the insulation bump structure can be ensured not to be identified by naked eyes, and the visual effect presented by the invention is not influenced.

In order to achieve the above technical object, the present invention provides a touch detection method applied to an optical touch screen, where the optical touch screen includes any one of the optical touch screen structures provided by the present invention, and the method includes: when the optical sensing unit detects that the optical signal is blocked, judging whether the first membrane switch is in a closed state or not; triggering a touch response if the first membrane switch is in a closed state; and if the first membrane switch is in an off state, not triggering a touch response. Based on the technical scheme after the improvement, the optical touch screen can judge whether the light signal is blocked or not due to the touch of a user according to the on-off state of the first film switch, and then the touch response can be triggered under the condition that the optical sensing unit detects that the light signal is blocked and the first film switch is in the closed state by external force extrusion, so that the situation that the touch response is triggered by mistake can be effectively avoided, the anti-interference capability of the touch screen is greatly improved, and the touch effectiveness is improved.

In at least one embodiment of the present invention, the determining whether the first membrane switch is in a closed state includes: judging whether the first membrane switch is in a closed state or not by detecting an electric signal; the electrical signal is a signal which is triggered to be generated when the first membrane switch is in a closed state. Based on the improved technical scheme, whether the first membrane switch is in the closed state or not can be judged according to the closed state detection result of the electric signal so as to ensure the effectiveness of a touch event, and therefore the situation that the touch response is triggered by mistake can be avoided greatly.

In at least one embodiment of the present invention, the electrical signal is a signal triggered and generated when the first membrane switch is transformed from an open state to a closed state after being extruded by an external force to deform. Based on the improved technical scheme, the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

To achieve the above technical object, the present invention provides a capacitive touch screen structure, including: a liquid crystal module; the second optical adhesive layer is arranged on the liquid crystal module; a second thin film switch including a third conductive film layer and a fourth conductive film layer; the third conductive film layer is arranged on the second optical adhesive layer, and a second gap is formed between the fourth conductive film layer and the third conductive film layer; the third optical adhesive layer is arranged on the fourth conductive film layer; the capacitive sensing structure comprises a driving electrode layer, a fourth optical adhesive layer and a sensing electrode layer; the driving electrode layer is arranged on the third optical adhesive layer, the fourth optical adhesive layer is arranged on the driving electrode layer, and the sensing electrode layer is arranged on the fourth optical adhesive layer; the fifth optical adhesive layer is arranged on the capacitance sensing structure; the second touch cover plate is arranged on the fifth optical adhesive layer. The invention provides an improved capacitive touch screen structure, which can determine to trigger touch response under the condition that a capacitive sensing structure detects that an object touches a second touch cover plate and an electric field between a driving electrode layer and an induction electrode layer is changed and is in a closed state according to the condition that a second membrane switch is extruded by external force, so that the condition that the touch response is triggered by mistake can be effectively avoided, thereby being beneficial to improving the anti-interference capability of the touch screen and improving the touch effectiveness.

In at least one embodiment of the present invention, the electrode polarity of the third conductive film layer is opposite to the electrode polarity of the fourth conductive film layer. Based on the improved technical scheme, when the touch screen is extruded by external force, the touch screen can ensure that the contact position of the third conductive film layer and the fourth conductive film layer is in a closed state, and the closed state can be used for determining an electric signal for triggering touch response, so that the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

In at least one embodiment of the present invention, the second membrane switch further includes: the second isolation structure is arranged in a second gap between the third conductive film layer and the fourth conductive film layer. Based on the improved technical scheme, the second membrane switch can be ensured to be in the off state when the touch screen is not in use, so that the occurrence of the situation that the touch response is triggered by mistake can be greatly reduced or even completely avoided.

In at least one embodiment of the present invention, the second isolation structure includes a plurality of second insulation bump structures uniformly distributed. Based on the improved technical scheme, the invention ensures that the second membrane switch is in the off state under the condition of not being extruded by external force, thereby effectively ensuring the improvement of the anti-interference capability of the touch screen and avoiding the occurrence of the condition that the touch response is triggered by mistake.

In at least one embodiment of the present invention, the size of the second insulation bump structure is less than 50um by 50um, and the distance between two adjacent second insulation bump structures is 5mm by 5mm. Based on the improved technical scheme, the insulation bump structure can be ensured not to be identified by naked eyes, and the visual effect presented by the invention is not influenced.

In order to achieve the above technical object, the present invention provides a touch detection method applied to a capacitive touch screen, where the capacitive touch screen includes any one of the capacitive touch screen structures provided by the present invention, and the method includes: when the capacitance sensing structure detects that the electric field between the driving electrode layer and the sensing electrode layer is changed, judging whether the second membrane switch is in a closed state or not; triggering a touch response if the second membrane switch is in a closed state; and if the second membrane switch is in an off state, not triggering a touch response. Based on the technical scheme after the improvement, the capacitive touch screen can judge whether the electric field between the driving electrode layer and the sensing electrode layer is changed or not due to user touch according to the switching state of the second membrane switch, so that touch response can be triggered under the condition that the electric field between the driving electrode layer and the sensing electrode layer is changed and the second membrane switch is in a closed state due to external force extrusion, the situation that the touch response is triggered by mistake can be effectively avoided, the anti-interference capability of the touch screen is greatly improved, and the touch effectiveness is improved.

In at least one embodiment of the present invention, the determining whether the second membrane switch is in the closed state includes: judging whether the second membrane switch is in a closed state or not by detecting whether the second membrane switch is in a closed state or not by an electric signal; the electrical signal is a signal which is triggered to be generated when the second membrane switch is in a closed state. Based on the improved technical scheme, whether the second membrane switch is in the closed state or not can be judged according to the closed state detection result of the electric signal so as to ensure the effectiveness of the touch event, and therefore the situation that the touch response is triggered by mistake can be avoided greatly.

In at least one embodiment of the present invention, the electrical signal is a signal triggered and generated when the second membrane switch is transformed from an open state to a closed state after being deformed by extrusion of an external force. Based on the improved technical scheme, the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

To achieve the above technical purpose, the present invention also provides a touch device, which includes, but is not limited to, the optical touch screen structure in any embodiment of the present invention.

To achieve the above technical purpose, the present invention also provides a touch device, which includes, but is not limited to, a capacitive touch screen structure in any embodiment of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a touch screen of a conventional optical touch technology.

FIG. 2 shows a schematic diagram of an optical touch screen structure in one or more embodiments of the invention.

Fig. 3 shows a schematic structural diagram of a first membrane switch involved in one or more embodiments of the present invention.

FIG. 4 illustrates a top view of a touch screen structure in one or more embodiments of the invention.

FIG. 5 illustrates another structural schematic of an optical touch screen structure in one or more embodiments of the invention.

Fig. 6 is a flow chart illustrating a touch detection method according to one or more embodiments of the invention.

Fig. 7 shows a schematic structural diagram of a touch screen of a conventional capacitive touch technology.

FIG. 8 illustrates a schematic diagram of a capacitive touch screen structure in accordance with one or more embodiments of the invention.

Fig. 9 shows a schematic structural diagram of a second membrane switch involved in one or more embodiments of the invention.

FIG. 10 illustrates another structural schematic of a capacitive touch screen structure in one or more embodiments of the invention.

FIG. 11 is a flow chart illustrating a touch detection method according to one or more embodiments of the invention.

In the drawing the view of the figure,

10. A first cover plate; 20. a first electrode layer; 30. a reflection sheet; 40. an optical sensor;

50. A liquid crystal module; 60. an optically clear adhesive layer; 70. a capacitive sensing structure; 80. a second cover plate;

71. A driving layer; 72. an induction layer;

100. a first touch cover plate; 200. a first optical adhesive layer; 300. a first membrane switch;

400. a first touch electrode layer; 500. an optical sensing unit;

301. a first conductive film layer; 302. a second conductive film layer; 303. a first isolation structure;

3031. A first insulating bump structure;

600. a liquid crystal module; 700. a second optical adhesive layer; 800. a second membrane switch;

801. A third conductive film layer; 802. a fourth conductive film layer; 803. a second isolation structure;

900. a third optical adhesive layer; 1000. a capacitive sensing structure; 1100. a fourth optical adhesive layer;

1001. A driving electrode layer; 1002. a fourth optical adhesive layer; 1003. an induction electrode layer;

1200. and a second touch pad.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention. Various structural schematic diagrams according to embodiments of the present invention are shown in the accompanying drawings. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted.

The shapes of the various regions, layers and relative sizes, positional relationships between them shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required. In the context of embodiments of the present invention, when a layer/element is referred to as being "on" another layer/element, it can be directly on the other layer/element or intervening layers/elements may be present therebetween. In addition, if one layer/element is located "on" another layer/element in one orientation, that layer/element may be located "under" the other layer/element when the orientation is turned.

In the related art, as shown in fig. 1, a touch screen structure based on an optical touch technology includes: the first cover plate 10, the first electrode layer 20, the reflection sheet 30, and the optical sensor 40. The first electrode layer 20 is disposed on the first cover plate 10; the reflective sheet 30 is disposed at the peripheral edge of the upper surface of the first electrode layer 20; the optical sensors 40 are disposed at the upper left and upper right of the upper surface of the first electrode layer 20, respectively. The optical sensor 40 includes a Light Emitting Diode (LED) and a camera, among others. The LED emits an optical signal, which is reflected to the camera by the reflective sheet 30. If an object touches the upper surface of the first electrode layer 20, the camera is blocked from detecting the optical signal, and then a touch response is triggered. That is, such touch screens are based directly on whether the light signal is occluded to determine whether to trigger a touch response. But the touch screen structure is prone to false triggering of a touch response if the user is not in use and the light signal is blocked. For example: the pen or finger drop process is not touching the touch cover surface, but the touch response is triggered by mistake due to the shielding of the light signal reflection. Or in an outdoor scene, when mosquitoes gather on the upper surface of the first electrode layer 20, the light signals are also shielded, so that the touch response is triggered by mistake, and further, the situation of touch jumping points is caused.

In view of this, the present invention provides a new touch screen structure, including: the touch panel comprises a first touch cover plate, a first optical adhesive layer, a first film switch, a first touch electrode layer and an optical electrode layer. The first optical adhesive layer is arranged on the first touch cover plate, the first thin film switch is arranged on the first touch cover plate, the first touch electrode layer is arranged on the first thin film switch, and the optical sensing unit is arranged on the first touch electrode layer. The first thin film switch comprises a first conductive film layer and a second conductive film layer. The first conductive film layer is arranged on the first optical adhesive layer, and a first gap is formed between the second conductive film layer and the first conductive film layer. The embodiment of the invention provides an improved optical touch screen structure, which can trigger touch response when an optical sensing unit detects that an optical signal is blocked and a first film switch is extruded by external force to be in a closed state, so that the situation that the touch response is triggered by mistake can be effectively avoided, the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

As shown in fig. 2, at least one embodiment of the present invention can provide an optical touch screen structure including, but not limited to, a first touch cover plate 100, a first optical adhesive layer 200, a first thin film switch 300, a first touch electrode layer 400, and an optical sensing unit 500. The first touch cover 100, the first optical adhesive layer 200, the first thin film switch 300, the first touch electrode layer 400, and the optical sensing unit 500 according to this embodiment may be sequentially formed, for example, sequentially processed from bottom to top. Wherein the first membrane switch 300 includes a first conductive film layer 301 and a second conductive film layer 302; the first conductive film layer 301 is disposed on the first optical adhesive layer 200, and a first gap is formed between the second conductive film layer 302 and the first conductive film layer 301, so as to form an integrated structure. The first optical adhesive layer 200 of the present embodiment is disposed on the first touch cover 100; the first conductive film layer 301 is disposed on the first optical adhesive layer 200; the second conductive film layer 302 is disposed on the first conductive film layer 301; a first touch electrode layer 400 disposed on the second conductive film layer 302; the optical sensing unit 500 is disposed on the first touch electrode layer 400.

The optical sensing unit 500 is a unit for detecting whether an optical signal is blocked. The optical sensing unit may include, but is not limited to, an LED for emitting an optical signal, a camera for receiving an optical signal, and a reflective sheet for reflecting an optical signal.

In at least one embodiment of the present invention, the polarity of the electrode of the first conductive film layer is opposite to the polarity of the electrode of the second conductive film layer. That is, if the electrode polarity of the first conductive film layer 301 is positive, the electrode polarity of the second conductive film layer 302 is negative. If the electrode polarity of the first conductive film layer 301 is negative, the electrode polarity of the second conductive film layer 302 is positive. The electrode polarity of the first conductive film layer 301 or the second conductive film layer 302 may be defined according to the requirement, and is not limited in the present invention. Based on the improved technical scheme, when the touch screen is extruded by external force, the touch screen can ensure that the contact position of the first conductive film layer and the second conductive film layer is in a closed state, and the closed state can be used for determining an electric signal for triggering touch response, so that the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

In at least one embodiment of the present invention, the conductive surface of the first conductive film layer 301 is opposite to the conductive surface of the second conductive film layer 302, so that when the first conductive film layer 301 and the second conductive film layer 302 are extruded by an external force and deform, the first conductive film layer 301 at the extruded position can be attached to the second conductive film layer 302, so that the first membrane switch 300 is in a closed state, and an electrical signal for triggering a touch response is generated and the closed state is used for determining the touch response, so as to ensure the effectiveness of a touch event.

Alternatively, the first conductive film layer 301 and the second conductive film layer 302 are both transparent conductive film layers. The embodiment of the invention can be based on the advantages of good conductivity, high transparency in the visible light range and the like of the transparent conductive film layer material, and greatly improves the reliability and the yield of the touch screen.

Alternatively, the second conductive film layer 302 is a silver (Ag) conductive film layer, and the upper surface of the second conductive film layer 302 may be an Ag hardened surface. The invention can further improve the durability and practicability of the touch screen by means of the advantages of anti-glare, anti-reflection, easy powdering and the like of the silver conductive film layer material.

As shown in fig. 3, the first membrane switch 300 in at least one embodiment of the present invention further includes, but is not limited to, a first isolation structure 303. The first isolation structure 303 is disposed in a first gap between the first conductive film layer 301 and the second conductive film layer 302, so that when the touch panel is not extruded by an external force, the first conductive film layer 121 and the second conductive film layer 122 are in an isolated state, and an electrical signal for triggering a touch response cannot be generated, so that the occurrence of a situation that the touch response is triggered by mistake can be greatly avoided.

As shown in fig. 4, in at least one embodiment of the present invention, the first isolation structure 303 includes a plurality of first insulation bump structures 3031 that are uniformly distributed, so that the first conductive film layer 301 and the second conductive film layer 302 are in an isolated state and are not contacted together under the condition of no external force extrusion, and therefore, the present invention can control whether the membrane switch is closed according to the stress state of the membrane switch, so that the occurrence of the situation that the touch response is triggered by mistake can be greatly avoided. Optionally, the size of the first insulating bump structures 3031 is less than 50um×50um, and the distance between two adjacent first insulating bump structures 3031 is 5mm×5mm, so that the first insulating bump structures can be ensured not to be identified by naked eyes, and the visual effect presented by the invention is not affected.

In at least one embodiment of the invention, the invention can be stuck on the auxiliary screen which can be touched by the intelligent blackboard through the optical transparent adhesive (Optically CLEAR ADHESIVE, OCA) so as to meet the use requirement of a user.

As shown in fig. 5, in the improved technical solution provided by the present invention, when the optical signal is blocked and the first membrane switch 300 is not deformed by external force extrusion and is in the off state, it can be determined that the user does not use the present invention, and further the touch response is not triggered. When the optical signal is blocked, the first membrane switch 300 is deformed to be in a closed state by being pressed by an external force, and an electrical signal in the closed state is generated, it can be determined that the user uses the touch sensor to trigger a touch response. According to the improved optical touch screen structure provided by the invention, whether the touch response is triggered can be determined according to whether the first membrane switch is extruded by external force to generate an electric signal in a closed state or not under the condition that the optical signal is blocked, so that the touch effectiveness can be ensured, and the situation that the touch response is triggered by mistake can be greatly avoided.

Based on the same technical concept, at least one embodiment of the present invention also provides a touch detection method applied to an optical touch screen. The structure of the optical touch screen can be any optical touch screen structure provided by the invention.

Fig. 6 is a flow chart illustrating a touch detection method according to one or more embodiments of the invention. As shown in fig. 6, the touch detection method includes the following steps S101 to S103.

In step S101, when the optical sensing unit detects that the optical signal is blocked, it is determined whether the first membrane switch is in a closed state.

In the embodiment of the invention, when the optical sensing unit detects that the optical signal is blocked, the object is characterized as being close to the optical touch screen, and further whether the first membrane switch is in a closed state is further judged to determine whether to trigger the touch response according to the switch state of the first membrane switch in order to avoid the situation that the touch response is triggered by mistake. The first thin film switch comprises a first conductive film layer and a second conductive film layer, and a first gap is formed between the first conductive film layer and the second conductive film layer. When the first membrane switch is not extruded by external force, the first conductive film layer and the second conductive film layer are in an isolated state, and then the switch state of the first membrane switch is in an off state. When the first membrane switch is extruded by external force, the first conductive film layer at the extruded position can be attached to the second conductive film layer, so that the switch state of the first membrane switch is in a closed state. Therefore, by detecting whether the first membrane switch is in the closed state, it can be determined whether or not the optical signal is currently blocked due to the user touching the first touch electrode layer of the optical touch screen.

In at least one embodiment of the present invention, determining whether the first membrane switch is in a closed state includes: and judging whether the first membrane switch is in a closed state or not by detecting whether the first membrane switch is in a closed state or not by an electric signal. The electric signal is a signal generated by triggering when the first membrane switch is in the closed state, so that whether the first membrane switch is in the closed state or not can be judged according to the detection result of the closed state of the electric signal, the effectiveness of a touch event is ensured, and the situation that the touch response is triggered by mistake can be avoided greatly.

In at least one embodiment of the invention, the electric signal is a signal generated by triggering when the first membrane switch is changed from the open state to the closed state after the first membrane switch is extruded by external force to deform, so that the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

In step S102, if the first membrane switch is in a closed state, a touch response is triggered.

In the embodiment of the invention, if the first membrane switch is in the closed state, the light signal is blocked because the user needs to touch the optical touch screen, and further, the touch response is triggered to meet the use requirement of the user.

In step S103, if the first membrane switch is in the off state, the touch response is not triggered.

In the embodiment of the invention, if the first membrane switch is in the off state, the blocking of the characterization optical signal may be caused by blocking by other objects, rather than the user touching the optical touch screen. Therefore, in order to avoid influencing normal use of a user, the touch influence is not triggered, so that false triggering is avoided, and the anti-interference capability of the touch screen is enhanced.

Through the embodiment, the optical touch screen can judge whether the light signal is caused by the touch of a user according to the on-off state of the first membrane switch, and then the touch response can be triggered under the condition that the optical sensing unit detects that the light signal is blocked and the first membrane switch is in the closed state by external force extrusion, so that the situation that the touch response is triggered by mistake can be effectively avoided, the anti-interference capability of the touch screen is greatly improved, and the touch effectiveness is improved.

Therefore, the invention can meet the requirement of zero-height touch writing, further greatly improve the practicability of the invention and effectively improve the anti-interference capability of the touch screen. In addition, when the invention is used in an outdoor scene, mosquito interference can be effectively avoided.

In at least one embodiment of the present invention, when it is detected that the touch area of the touch optical touch screen is smaller than the designated area, it may be determined whether to trigger the touch response in combination with the on-off state of the first membrane switch. When the touch area of the touch optical touch screen is detected to be larger than or equal to the designated area, touch response is triggered, so that the response speed is improved, and the use experience of a user is improved. In one example, the designated area may be: 10mm by 10mm.

In the related art, as shown in fig. 7, a touch screen structure based on a capacitive touch technology includes: the liquid crystal module 50, the optical adhesive layer 60, the capacitive sensing structure 70 and the second cover plate 80. Wherein the capacitive sensing structure 70 comprises a driving layer 71 and a sensing layer 72. When an object touches the surface of the liquid crystal module 50, the electric field between the driving layer 71 and the sensing layer 72 changes, so as to generate a touch response. If objects such as water drops fall on the second cover plate, the electric field between the driving layer 71 and the sensing layer 72 will change, and the touch response will be triggered by mistake, so as to generate a point reporting phenomenon.

In view of this, the present invention provides a new touch screen structure, including: the touch panel comprises a liquid crystal module, a second optical adhesive layer, a second film switch, a third optical adhesive layer, a capacitance sensing structure, a fourth optical adhesive layer and a second touch cover plate. The second optical glue layer is arranged on the liquid crystal module, the second membrane switch is arranged on the second optical glue layer, the third optical glue layer is arranged on the fourth conductive film layer, the capacitance sensing structure is arranged on the fourth conductive film layer, the fourth optical glue layer is arranged on the capacitance sensing structure, and the second touch cover plate is arranged on the fourth optical glue layer. Wherein the second thin film switch comprises a third conductive film layer and a fourth conductive film layer; the third conductive film layer is arranged on the second optical adhesive layer, and a second gap is formed between the fourth conductive film layer and the third conductive film layer. The capacitive sensing structure comprises a driving electrode layer, a fourth optical adhesive layer and a sensing electrode layer; the driving electrode layer is arranged on the third optical adhesive layer, the fourth optical adhesive layer is arranged on the driving electrode layer, and the sensing electrode layer is arranged on the fourth optical adhesive layer. The embodiment of the invention provides an improved capacitive touch screen structure, which can be used for determining to trigger touch response when a capacitive sensing structure detects that an object touches a second touch cover plate and an electric field between a driving electrode layer and an induction electrode layer is changed, and further can be used for effectively avoiding the occurrence of the condition that the touch response is triggered by mistake under the condition that a second membrane switch is extruded by external force to be in a closed state, so that the anti-interference capability of the touch screen can be greatly improved and the touch effectiveness is improved.

As shown in fig. 8, at least one embodiment of the present invention can provide a capacitive touch screen structure including, but not limited to, a liquid crystal module 600, a second optical glue layer 700, a second thin film switch 800, a third optical glue layer 900, a capacitive sensing structure 1000, a fifth optical glue layer 1100, and a second touch cover plate 1200. The liquid crystal module 600, the second optical adhesive layer 700, the second thin film switch 800, the third optical adhesive layer 900, the capacitive sensing structure 1000, the fifth optical adhesive layer 1100 and the second touch cover 1200 according to the present embodiment may be sequentially formed, for example, sequentially processed from bottom to top. Wherein the second membrane switch 800 includes a third conductive film layer 801 and a fourth conductive film layer 802; the third conductive film layer 801 is disposed on the second optical adhesive layer 700, and a second gap is formed between the fourth conductive film layer 802 and the third conductive film layer 801, so as to form an integrated structure. The capacitive sensing structure 1000 includes a driving electrode layer 1001, a fourth optical adhesive layer 1002 and a sensing electrode layer 1003; the driving electrode layer 1001 is disposed on the third optical adhesive layer 900, the fourth optical adhesive layer 1002 is disposed on the driving electrode layer 1001, and the sensing electrode layer 1003 is disposed on the fourth optical adhesive layer 1002, thereby forming an integrated structure. The second optical adhesive layer 700 of the present embodiment is disposed on the liquid crystal module 600; the second membrane switch 800 is disposed on the second optical adhesive layer 700; the third optical adhesive layer 900 is disposed on the fourth conductive film layer 802; the capacitance sensing structure 1000 is disposed on the third optical adhesive layer 900; a fifth optical adhesive layer 1100 disposed on the capacitive sensing structure 1000; the second touch cover 1200 is disposed on the fifth optical adhesive layer 1100.

The capacitive sensing structure 1000 is a structure for determining whether an object touches the second touch pad 1200. The capacitive sensing structure 1000 may include, but is not limited to, a driving electrode layer 1001, a fourth optical glue layer 1002, and a sensing electrode layer 1003 provided in this embodiment.

In the embodiment of the present invention, the electrode polarity of the third conductive film layer 801 is opposite to the electrode polarity of the fourth conductive film layer 802. That is, if the electrode polarity of the third conductive film layer 801 is positive, the electrode polarity of the fourth conductive film layer 802 is negative. If the electrode polarity of the third conductive film layer 801 is negative, the electrode polarity of the fourth conductive film layer 802 is positive. The electrode polarity of the third conductive film layer 801 or the fourth conductive film layer 802 may be defined as required, and is not limited in the present invention. Based on the improved technical scheme, when the touch screen is extruded by external force, the touch screen can ensure that the contact position of the third conductive film layer and the fourth conductive film layer is in a closed state, and the closed state can be used for determining an electric signal for triggering touch response, so that the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

In at least one embodiment of the present invention, the conductive surface of the third conductive film layer 801 is opposite to the conductive surface of the fourth conductive film layer 802, so that when the third conductive film layer 801 and the fourth conductive film layer 802 are deformed by extrusion of an external force, the third conductive film layer 801 at the extruded position can be attached to the fourth conductive film layer 802, so that the second membrane switch 800 is in a closed state, and an electrical signal for triggering a touch response is generated and the closed state is used for determining the touch response, so as to ensure the effectiveness of a touch event.

Alternatively, the third conductive film layer 801 and the fourth conductive film layer 802 are both transparent conductive film layers. The embodiment of the invention can be based on the advantages of good conductivity, high transparency in the visible light range and the like of the transparent conductive film layer material, and greatly improves the reliability and the yield of the touch screen.

As shown in fig. 9, the second membrane switch 800 in at least one embodiment of the present invention further includes: and a second isolation structure 803. The second isolation structure 803 is disposed in the second gap between the third conductive film layer 801 and the fourth conductive film layer 802, so that when the touch panel is not pressed by external force, the third conductive film layer 801 and the fourth conductive film layer 802 are in an isolated state, and cannot generate an electrical signal for triggering a touch response, so that the occurrence of false triggering of the touch response can be greatly avoided.

In at least one embodiment of the present invention, the second isolation structure 803 includes a plurality of second insulation bump structures that are uniformly distributed, so that when the third conductive film layer 801 and the fourth conductive film layer 802 are isolated from each other and are not contacted together, and the second membrane switch 800 is in an off state, so that the occurrence of a situation that a touch response is triggered by mistake can be greatly avoided.

Optionally, the size of the insulation bump structure is smaller than 50um, the distance between two adjacent insulation bump structures is 5mm or 5mm, so that the insulation bump structures can be ensured not to be identified by naked eyes, and the visual effect presented by the invention is not affected.

As shown in fig. 10, in the improved technical solution provided by the present invention, when the electric field between the driving electrode layer 1001 and the sensing electrode layer 1003 is changed and the second membrane switch 800 is deformed by external force to be in a closed state, the touch is determined to be an effective touch, so as to trigger a touch response. When the electric field between the driving electrode layer 1001 and the sensing electrode layer 1003 is changed and the second membrane switch 800 is deformed in the off state without being pressed by an external force, it is determined that the touch is an invalid touch, and thus a touch response is not triggered. According to the improved capacitive touch screen structure provided by the invention, whether the touch response is triggered or not can be determined according to whether the electric signal which is generated by the second membrane switch and is in the closed state due to the extrusion of the external force under the condition that the electric field is changed, so that the touch effectiveness can be ensured, the situation that the touch response is triggered by mistake is avoided greatly, and the use requirement of zero-height writing of a user is met.

Therefore, the invention can meet the requirement of zero-height touch writing, further greatly improve the practicability of the invention and effectively improve the anti-interference capability of the touch screen. In addition, when the water drops fall on the surface of the invention, the occurrence of the phenomenon of reporting points can be effectively avoided.

Based on the same technical concept, at least one embodiment of the present invention also provides a touch detection method applied to a capacitive touch screen. The structure of the capacitive touch screen can be any one of the capacitive touch screen structures provided by the invention.

FIG. 11 is a flow chart illustrating a touch detection method according to one or more embodiments of the invention. As shown in fig. 11, the touch detection method includes the following steps S201 to S203.

In step S201, when the capacitance sensing structure detects that the electric field between the driving electrode layer and the sensing electrode layer is changed, it is determined whether the second membrane switch is in a closed state.

In the embodiment of the invention, when the capacitance sensing structure detects that the electric field between the driving electrode layer and the sensing electrode layer is changed, the object is characterized as being close to the electric touch screen, and further whether the second membrane switch is in a closed state is further judged to determine whether to trigger the touch response according to the switch state of the second membrane switch in order to avoid the situation that the touch response is triggered by mistake. The second thin film switch comprises a third conductive film layer and a fourth conductive film layer, and a second gap is arranged between the third conductive film layer and the fourth conductive film layer. When the second membrane switch is not extruded by external force, the third conductive film layer and the fourth conductive film layer are in an isolated state, and then the switch state of the second membrane switch is in an off state. When the second membrane switch is extruded by external force, the third conductive film layer at the extruded position can be attached to the fourth conductive film layer, so that the switch state of the second membrane switch is in a closed state. Therefore, by detecting whether the second membrane switch is in the closed state, it can be determined whether or not the electric field between the driving electrode layer and the sensing electrode layer is changed due to the user's touch.

In at least one embodiment of the present invention, determining whether the second membrane switch is in a closed state includes: judging whether the second membrane switch is in a closed state or not by detecting whether the second membrane switch is in a closed state or not by an electric signal; the electric signal is a signal generated by triggering when the second membrane switch is in the closed state, and whether the second membrane switch is in the closed state or not can be judged according to the detection result of the closed state of the electric signal, so that the effectiveness of a touch event is ensured, and the situation that the touch response is triggered by mistake can be avoided greatly.

In at least one embodiment of the invention, the electrical signal is a signal generated by triggering when the second membrane switch is changed from the open state to the closed state after the second membrane switch is extruded by external force to deform, so that the anti-interference capability of the touch screen can be greatly improved, and the touch effectiveness is improved.

In step S202, if the second membrane switch is in the closed state, a touch response is triggered.

In the embodiment of the invention, if the second membrane switch is in the closed state, the change of the electric field between the driving electrode layer and the sensing electrode layer is characterized in that the change is caused by the fact that a user needs to touch the capacitive touch screen, and then the touch response is triggered to meet the use requirement of the user.

In step S203, if the second membrane switch is in the off state, the touch response is not triggered.

In the embodiment of the invention, if the second membrane switch is in the closed state, the change of the electric field between the driving electrode layer and the sensing electrode layer is characterized by the shielding of other objects, but not the touch of the optical touch screen by the user. Therefore, in order to avoid influencing normal use of a user, the touch influence is not triggered, so that false triggering is avoided, and the anti-interference capability of the touch screen is enhanced.

Through the embodiment, the capacitive touch screen can judge whether the electric field between the driving electrode layer and the sensing electrode layer is changed due to user touch according to the on-off state of the second membrane switch, so that touch response can be triggered under the condition that the electric field between the driving electrode layer and the sensing electrode layer is changed and the second membrane switch is extruded by external force to be in the closed state, the situation that the touch response is triggered by mistake can be effectively avoided, the anti-interference capability of the touch screen is greatly improved, and the touch effectiveness is improved.

In at least one embodiment of the present invention, when it is detected that the touch area of the touch capacitive touch screen is smaller than the designated area, it may be determined whether to trigger the touch response in combination with the on-off state of the second membrane switch. When the touch area of the touch capacitive touch screen is detected to be larger than or equal to the designated area, touch response is triggered, so that response speed is improved, and user experience is improved. In one example, the designated area may be: 10mm by 10mm.

Based on the same technical concept, at least one embodiment of the present invention can also provide a touch device including, but not limited to, an optical touch screen structure or a capacitive touch screen structure in any embodiment of the present invention. The embodiments related to the optical touch screen structure or the specific structure of the capacitive touch screen structure in the present invention are described in detail in the present specification, and are not described herein again. The touch device provided by the invention can include, but is not limited to, the following categories: cell phone, smart watch, tablet computer, notebook computer, desktop display, television, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, intelligent interaction tablet, touch interaction terminal and the like.

In the description of the present specification, a description referring to the terms "present embodiment," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The above description is only of the preferred embodiments of the present invention, and is not intended to limit the invention, but any modifications, equivalents, and simple improvements made within the spirit of the present invention should be included in the scope of the present invention.

Claims (18)

1. An optical touch screen structure, comprising:

A first touch cover (100);

a first optical adhesive layer (200) disposed on the first touch cover plate (100);

A first membrane switch (300) comprising a first conductive film layer (301) and a second conductive film layer (302); wherein the first conductive film layer (301) is disposed on the first optical adhesive layer (200), and a first gap is formed between the second conductive film layer (302) and the first conductive film layer (301);

A first touch electrode layer (400) provided on the second conductive film layer (302);

An optical sensing unit (500) is provided on the first touch electrode layer (400).

2. The optical touch screen structure of claim 1, wherein the electrode polarity of the first conductive film layer (301) is opposite to the electrode polarity of the second conductive film layer (302).

3. The optical touch screen structure of claim 1 or 2, wherein the first membrane switch (300) further comprises:

And a first isolation structure (303) disposed in a first gap between the first conductive film layer (301) and the second conductive film layer (302).

4. An optical touch screen structure according to claim 3, wherein the first isolation structure (303) comprises a plurality of first insulating bump structures (3031) uniformly distributed.

5. An optical touch screen structure according to claim 4, wherein the first insulating bump structures (3031) have a size smaller than 50um by 50um, and the distance between two adjacent first insulating bump structures (3031) is 5mm by 5mm.

6. A touch detection method, applied to an optical touch screen, the optical touch screen comprising the optical touch screen structure of any one of claims 1-5, the method comprising:

when the optical sensing unit detects that the optical signal is blocked, judging whether the first membrane switch is in a closed state or not;

triggering a touch response if the first membrane switch is in a closed state;

And if the first membrane switch is in an off state, not triggering a touch response.

7. The method of claim 6, wherein determining whether the first membrane switch is in a closed state comprises:

judging whether the first membrane switch is in a closed state or not by detecting an electric signal;

the electrical signal is a signal which is triggered to be generated when the first membrane switch is in a closed state.

8. The method of claim 7, wherein the electrical signal is a signal generated by triggering when the first membrane switch changes from an open state to a closed state after being deformed by an external force.

9. A capacitive touch screen structure, comprising:

a liquid crystal module (600);

A second optical adhesive layer (700) disposed on the liquid crystal module (600);

a second membrane switch (800) comprising a third conductive membrane layer (801) and a fourth conductive membrane layer (802); wherein the third conductive film layer (801) is disposed on the second optical adhesive layer (700), and a second gap is formed between the fourth conductive film layer (802) and the third conductive film layer (801);

A third optical adhesive layer (900) disposed on the fourth conductive film layer (802);

A capacitive sensing structure (1000) comprising a drive electrode layer (1001), a fourth optical glue layer (1002) and a sense electrode layer (1003); wherein the driving electrode layer (1001) is disposed on the third optical adhesive layer (900), the fourth optical adhesive layer (1002) is disposed on the driving electrode layer (1001), and the sensing electrode layer (1003) is disposed on the fourth optical adhesive layer (1002);

A fifth optical adhesive layer (1100) disposed on the capacitive sensing structure (1000);

and the second touch cover plate (1200) is arranged on the fifth optical adhesive layer (1100).

10. The capacitive touch screen structure according to claim 9, characterized in that the electrode polarity of the third conductive film layer (801) is opposite to the electrode polarity of the fourth conductive film layer (802).

11. The capacitive touch screen structure of claim 9 or 10, wherein the second membrane switch (800) further comprises:

And a second isolation structure (803) provided in a second gap between the third conductive film layer (801) and the fourth conductive film layer (802).

12. The capacitive touch screen structure of claim 11, wherein the second isolation structure (803) comprises a plurality of second insulating bump structures uniformly distributed.

13. The capacitive touch screen structure of claim 12, wherein the second insulating bump structures have dimensions less than 50um by 50um, and a distance between two adjacent second insulating bump structures is 5mm by 5mm.

14. A touch detection method, characterized by being applied to a capacitive touch screen, the capacitive touch screen comprising the capacitive touch screen structure of any one of claims 9-13, the method comprising:

When the capacitance sensing structure detects that the electric field between the driving electrode layer and the sensing electrode layer is changed, judging whether the second membrane switch is in a closed state or not;

triggering a touch response if the second membrane switch is in a closed state;

and if the second membrane switch is in an off state, not triggering a touch response.

15. The method of claim 14, wherein determining whether the second membrane switch is in a closed state comprises:

judging whether the second membrane switch is in a closed state or not by detecting whether the second membrane switch is in a closed state or not by an electric signal;

the electrical signal is a signal which is triggered to be generated when the second membrane switch is in a closed state.

16. The method of claim 15, wherein the electrical signal is a signal generated by triggering the second membrane switch when the second membrane switch changes from an open state to a closed state after the second membrane switch is deformed by an external force.

17. A touch device comprising the optical touch screen structure of any of claims 1-5.

18. A touch device comprising the capacitive touch screen structure of any of claims 9-13.