Touch screen and touch screen terminal

Abstract

The present invention provides a touch screen and a touch screen terminal. The touch screen includes a cover plate, a sensing electrode layer, and a driving electrode layer. The cover plate includes a display area; the sensing electrode layer includes a stacked touch sensing electrode layer and a fingerprint sensing electrode layer, the touch sensing electrode layer includes touch sensing electrodes, and the fingerprint sensing electrode layer includes fingerprint sensing electrodes; the driving electrode layer is located on a side of the sensing electrode layer away from the cover plate, and the driving electrode layer includes a substrate and driving electrodes formed on the substrate; wherein, the sensing electrode layer and the driving electrode layer are opposite to the display area, a first capacitance is formed between the touch sensing electrodes and the driving electrodes, and a second capacitance is formed between the fingerprint sensing electrodes and the driving electrodes. The touch screen provided by the present invention not only realizes the purpose of fingerprint recognition function in the transparent window area of the touch screen, but also reduces the thickness of the touch screen by integrating the fingerprint driving electrodes and the touch driving electrodes onto the driving electrode layer.

Description

Technical Field

[0001] The present invention relates to the field of touch screens, and more particularly, to a touch screen and a touch screen terminal including the touch screen. Background Art

[0002] Currently, GFF or GF structure touch screens of mobile phones, tablets, wearable devices, etc. all adopt an external Bonding fingerprint module to achieve the fingerprint recognition function of the touch screen; due to the limitation of the external shape structure of the fingerprint module 30', the fingerprint recognition can only be restricted to a fixed area outside the transparent window 10', such as Figure 1 In, the fingerprint recognition is restricted to the fingerprint recognition area 20' outside the transparent window 10'.

[0003] This common fingerprint recognition solution can only be realized in a fixed area outside the transparent window of the touch screen, such as at the position of the touch screen button area or a fixed position on the back of the touch screen. With the development of the times and the popularization of the fingerprint recognition concept, while users pursue a large screen ratio, the demand for in-plane fingerprint recognition of the touch screen is becoming more and more urgent. However, the existing fingerprint recognition solution attaches a fingerprint module at the position of the button under the touch screen, and the fingerprint recognition function is restricted to this area, and the in-plane window area fingerprint recognition function cannot be realized; this solution also makes the lower border of the touch screen larger and cannot effectively increase the screen ratio. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art.

[0005] To this end, an object of one aspect of the present invention is to provide a touch screen.

[0006] Another object of the present invention is to provide a touch screen terminal including the above touch screen.

[0007] To achieve the above object, an embodiment of one aspect of the present invention provides a touch screen, including: a cover plate including a display area; a sensing electrode layer including a stacked touch sensing electrode layer and a fingerprint sensing electrode layer, the touch sensing electrode layer including touch sensing electrodes, and the fingerprint sensing electrode layer including fingerprint sensing electrodes; and a driving electrode layer located on a side of the sensing electrode layer away from the cover plate, the driving electrode layer including a substrate and driving electrodes formed on the substrate; wherein, the sensing electrode layer and the driving electrode layer are opposite to the display area, a first capacitor is formed between the touch sensing electrodes and the driving electrodes, and a second capacitor is formed between the fingerprint sensing electrodes and the driving electrodes.

[0008] The touch screen provided in the above embodiments of the present invention includes a driving electrode layer, a touch sensing electrode layer, a fingerprint sensing electrode layer, and a cover plate sequentially arranged from bottom to top, or a driving electrode layer, a fingerprint sensing electrode layer, a touch sensing electrode layer, and a cover plate sequentially arranged from bottom to top.

[0009] Based on the GFF external-mounted touch screen, a first capacitor is formed between the touch sensing electrode and the driving electrode to realize the touch function of the touch screen. A second capacitor is formed between the fingerprint sensing electrode and the driving electrode, and the fingerprint recognition function is realized by the change in the capacitance value of the second capacitor caused by the contact between the finger and the touch screen. Moreover, the sensing electrode layer and the driving electrode layer are arranged corresponding to the display area, so that the fingerprint recognition function can be realized in the display area, that is, the fingerprint recognition function in the in-plane transparent window area of the touch screen can be realized, thereby reducing the lower border of the touch screen and effectively increasing the screen-to-body ratio. At the same time, on this basis, the fingerprint sensing electrode layer is independent of the touch sensing electrode layer. The driving electrode on the driving electrode layer forms a first capacitor with the touch sensing electrode and a second capacitor with the fingerprint sensing electrode, avoiding the setting of an independent touch driving electrode layer and a fingerprint driving electrode layer. Or rather, in this application, the fingerprint driving electrode layer and the touch driving electrode layer are integrated on the same electrode layer (the driving electrode layer), thereby reducing one driving electrode layer (the fingerprint driving electrode layer or the touch driving electrode layer) and reducing the product thickness to achieve lightness and thinness. Of course, this application is also applicable to the currently popular external-mounted GFF structure.

[0010] In addition, the touch screen provided in the above embodiments of the present invention further has the following additional technical features:

[0011] In the above technical solution, preferably, the touch sensing electrode layer is located between the fingerprint sensing electrode layer and the cover plate. At this time, in the direction from bottom to top, the driving electrode layer, the fingerprint sensing electrode layer, the touch sensing electrode layer, and the cover plate are sequentially arranged. In practical applications, the positions of the fingerprint sensing electrode layer and the touch sensing electrode layer can be flexibly determined; or, the fingerprint sensing electrode layer is located between the touch sensing electrode layer and the cover plate. At this time, in the direction from bottom to top, the driving electrode layer, the touch sensing electrode layer, the fingerprint sensing electrode layer, and the cover plate are sequentially arranged. In practical applications, the positions of the fingerprint sensing electrode layer and the touch sensing electrode layer can be flexibly determined.

[0012] In the above technical solution, preferably, the driving electrode includes a touch driving electrode and a fingerprint driving electrode that are insulated from each other. The touch sensing electrode and the touch driving electrode are arranged crosswise to form the first capacitor for detecting the touch position; the fingerprint sensing electrode and the fingerprint driving electrode are arranged crosswise to form the second capacitor for fingerprint sensing.

[0013] The driving electrode (driving electrode channel) can be the superposition of the fingerprint driving electrode (fingerprint driving electrode channel) in the simple fingerprint driving electrode layer and the touch driving electrode (touch driving electrode channel) in the touch driving electrode layer. A touch sensor is formed at the intersection of the touch sensing electrode and the touch driving electrode, and a fingerprint sensor is formed at the intersection of the fingerprint sensing electrode and the fingerprint driving electrode.

[0014] In the above technical solution, preferably, the touch screen further includes a fingerprint FPC and a touch FPC. The fingerprint FPC is connected to the fingerprint sensing electrode and the fingerprint driving electrode, and the touch FPC is connected to the touch sensing electrode and the touch driving electrode; or, the touch screen further includes an FPC, which is connected to the fingerprint sensing electrode, the fingerprint driving electrode, the touch sensing electrode, and the touch driving electrode.

[0015] The number of FPCs in the touch screen is two, namely the fingerprint FPC and the touch FPC. The fingerprint FPC is bonded to the corresponding fingerprint sensing electrode and fingerprint driving electrode, and the touch FPC is bonded to the corresponding touch sensing electrode and touch driving electrode. Of course, the number of FPCs in the touch screen is one. At this time, the fingerprint sensing electrode, the fingerprint driving electrode, the touch sensing electrode, and the touch driving electrode are all connected to the FCP, further reducing the cost of the touch screen.

[0016] In the above technical solution, preferably, the fingerprint sensing electrode and the touch sensing electrode are arranged in parallel; and / or, the fingerprint driving electrode and the touch driving electrode are arranged in parallel.

[0017] In the above technical solution, preferably, the driving electrode is arranged to cross the touch sensing electrode and can form a touch sensor, and is arranged to cross the fingerprint sensing electrode and can form a fingerprint sensor.

[0018] In this solution, the driving electrode can simultaneously realize the functions of the fingerprint driving electrode and the touch driving electrode, that is, the driving electrode crosses the touch sensing electrode to form a touch sensor to detect the touch position and realize the touch function of the touch screen, and the driving electrode crosses the fingerprint sensing electrode to form a fingerprint sensor to perform fingerprint sensing and realize the fingerprint recognition function.

[0019] In the above technical solution, preferably, the fingerprint sensing electrode and the touch sensing electrode are arranged in parallel, so as to realize the crossing arrangement of the driving electrode with the fingerprint sensing electrode and the touch sensing electrode at the same time.

[0020] In the above technical solution, preferably, the touch screen further includes a fingerprint FPC and a touch FPC. The fingerprint FPC is connected to the driving electrode and the fingerprint sensing electrode, and the touch FPC is connected to the driving electrode and the touch sensing electrode; alternatively, the touch screen further includes an FPC connected to the driving electrode, the fingerprint sensing electrode, and the touch sensing electrode.

[0021] The number of FPCs included in the touch screen is two, namely the fingerprint FPC and the touch FPC. The fingerprint FPC is bonded to the driving electrode and the fingerprint sensing electrode, and the touch FPC is bonded to the driving electrode and the touch sensing electrode. Of course, the number of FPCs included in the touch screen is one. At this time, the driving electrode, the fingerprint sensing electrode, and the touch sensing electrode are all connected to the FCP, further reducing the cost of the touch screen.

[0022] In the above technical solution, preferably, the fingerprint sensing electrode layer and / or the driving electrode layer is a metal mesh structure. By setting the fingerprint sensing electrode layer or the driving electrode layer as a metal mesh structure, or setting both the fingerprint sensing electrode layer and the driving electrode layer as metal mesh structures, conditions can be provided for realizing fingerprint recognition in the transparent window area, improving visual visibility.

[0023] An embodiment of the second aspect of the present invention provides a touch screen terminal, including the touch screen described in any of the above embodiments.

[0024] The touch screen terminal provided by the embodiment of the second aspect of the present invention has all the beneficial effects of the touch screen described in any of the above embodiments because it has the touch screen described in any of the above embodiments, and will not be elaborated here.

[0025] The additional aspects and advantages of the present invention will become obvious in the following description part, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0027] Figure 1 is a schematic structural diagram of a touch screen terminal in the related art.

[0028] Among them, Figure 1 the corresponding relationship between the reference numerals and the component names in the

[0029] 10’ transparent window area, 20’ fingerprint recognition area, 30’ fingerprint module.

[0030] Figure 2 is a schematic structural diagram of the touch screen described in the embodiment of the present invention.

[0031] Among them, Figure 2 The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0032] 1 Cover plate, 2 Display, 3 Driving electrode layer, 4 Fingerprint sensing electrode layer, 5 Touch sensing electrode layer. Specific embodiments

[0033] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0034] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0035] Next, a touch screen and a touch screen terminal according to some embodiments of the present invention will be described with reference to the drawings.

[0036] As Figure 2 shown, a touch screen according to some embodiments of the present invention includes a display 2, a cover plate 1, a sensing electrode layer, and a driving electrode layer 3. The cover plate 1 is disposed on the display 2, and the cover plate includes a display area; the sensing electrode layer includes a touch sensing electrode layer 5 and a fingerprint sensing electrode layer 4. The touch sensing electrode layer 5 and the fingerprint sensing electrode layer 4 are located between the display 2 and the cover plate 1 and are disposed close to the cover plate 1. The touch sensing electrode layer 5 includes touch sensing electrodes, and the fingerprint sensing electrode layer 4 includes fingerprint sensing electrodes; the driving electrode layer 3 is located between the display 2 and the cover plate 1 and is disposed close to the display 2, and the driving electrode layer 3 includes a substrate and driving electrodes formed on the substrate. The driving electrodes correspond to the touch sensing electrodes and the fingerprint sensing electrodes, and form a first capacitance with the touch sensing electrodes and a second capacitance with the fingerprint sensing electrodes; among them, the sensing electrode layer and the driving electrode layer are disposed opposite to the display area.

[0037] The touch screen provided by the above embodiments of the present invention includes a display 2, a driving electrode layer 3, a touch sensing electrode layer 5, a fingerprint sensing electrode layer 4, and a cover plate 1 sequentially disposed from bottom to top, or a display 2, a driving electrode layer 3, a fingerprint sensing electrode layer 4, a touch sensing electrode layer 5, and a cover plate 1 sequentially disposed from bottom to top. Preferably, the display 2 is a liquid crystal display 2 (LCD), and the cover plate 1 is a glass cover plate 1 or a transparent plastic cover plate 1, which mainly serves to protect the display 2.

[0038] Based on the GFF external touch screen, a first capacitor is formed between the touch sensing electrode and the driving electrode to realize the touch function of the touch screen. A second capacitor is formed between the fingerprint sensing electrode and the driving electrode, and the fingerprint recognition function is realized by the change in the capacitance value of the second capacitor caused by the contact between the finger and the touch screen. Moreover, the sensing electrode layer and the driving electrode layer are arranged corresponding to the display area, so that the fingerprint recognition function can be realized in the display area, that is, the fingerprint recognition function in the in-plane transparent window area of the touch screen can be realized, thereby reducing the lower border of the touch screen and effectively increasing the screen-to-body ratio. At the same time, on this basis, the fingerprint sensing electrode layer 4 is independent of the touch sensing electrode layer 5. The driving electrode on the driving electrode layer 3 forms a first capacitor with the touch sensing electrode and a second capacitor with the fingerprint sensing electrode, avoiding the setting of an independent touch driving electrode layer and fingerprint driving electrode layer. Or rather, in this application, the fingerprint driving electrode layer and the touch driving electrode layer are integrated on the same electrode layer (driving electrode layer), thereby reducing one driving electrode layer (fingerprint driving electrode layer or touch driving electrode layer) and reducing the product thickness to achieve thinness and lightness. Of course, this application is also applicable to the currently popular external GFF structure.

[0039] Embodiment 1:

[0040] A touch screen includes a display 2, a cover plate 1, a sensing electrode layer, and a driving electrode layer 3. The cover plate 1 is covered on the display 2, and the cover plate includes a display area; the sensing electrode layer includes a touch sensing electrode layer 5 and a fingerprint sensing electrode layer 4. The touch sensing electrode layer 5 and the fingerprint sensing electrode layer 4 are located between the display 2 and the cover plate 1 and are close to the cover plate 1. The touch sensing electrode layer 5 includes touch sensing electrodes, and the fingerprint sensing electrode layer 4 includes fingerprint sensing electrodes; the driving electrode layer 3 is located between the display 2 and the cover plate 1 and is close to the display 2. The driving electrode layer 3 includes a substrate and driving electrodes formed on the substrate. The driving electrodes correspond to the touch sensing electrodes and the fingerprint sensing electrodes, and form a first capacitor with the touch sensing electrodes and a second capacitor with the fingerprint sensing electrodes; wherein, the sensing electrode layer and the driving electrode layer are arranged opposite to the display area.

[0041] Preferably, the touch sensing electrode layer 5 is located between the fingerprint sensing electrode layer 4 and the cover plate 1. At this time, compared with the fingerprint sensing electrode layer, the touch sensing electrode layer is closer to the cover plate.

[0042] Of course, the fingerprint sensing electrode layer 4 can also be located between the touch sensing electrode layer 5 and the cover plate 1. At this time, compared with the touch sensing electrode layer, the fingerprint sensing electrode layer is closer to the cover plate.

[0043] Preferably, the driving electrode includes a touch driving electrode and a fingerprint driving electrode that are insulated from each other. The touch sensing electrode and the touch driving electrode are arranged crosswise to form a first capacitor for detecting the touch position; the fingerprint sensing electrode and the fingerprint driving electrode are arranged crosswise to form a second capacitor for fingerprint sensing.

[0044] The driving electrode includes a touch driving electrode and a fingerprint driving electrode that are insulated from each other. The touch driving electrode is arranged crosswise with the touch sensing electrode to form a touch sensor, and the fingerprint driving electrode is arranged crosswise with the fingerprint sensing electrode to form a fingerprint sensor.

[0045] Based on the GFF external-mounted touch screen, this application adds two layers of electrode lines (fingerprint sensing electrode layer and fingerprint driving electrode layer) on the touch screen sensor. The fingerprint sensing electrode layer 4 is provided with fingerprint sensing electrodes, and the fingerprint driving electrode layer is provided with fingerprint driving electrodes. The fingerprint recognition function in the transparent window area is realized by the change of the capacitance value between the fingerprint sensing electrode layer and the fingerprint driving electrode layer generated by the finger touching the touch screen. At the same time, on this basis, the fingerprint sensing electrode layer and the touch sensing electrode layer are independent, and the fingerprint driving electrode layer and the touch driving electrode layer are integrated on the same electrode layer (driving electrode layer) to reduce one layer of driving electrode layer (fingerprint driving electrode layer or touch driving electrode layer) and achieve the thinning of the product.

[0046] The driving electrode (driving electrode channel) can be the superposition of the fingerprint driving electrode (fingerprint driving electrode channel) in the simple fingerprint driving electrode layer and the touch driving electrode (touch driving electrode channel) in the touch driving electrode layer. The touch sensor is formed at the intersection of the touch sensing electrode and the touch driving electrode, and the fingerprint sensor is formed at the intersection of the fingerprint sensing electrode and the fingerprint driving electrode.

[0047] In a specific embodiment, the touch screen further includes a fingerprint FPC and a touch FPC. The fingerprint FPC is connected to the fingerprint sensing electrode and the fingerprint driving electrode, and the touch FPC is connected to the touch sensing electrode and the touch driving electrode.

[0048] The touch screen includes two FPCs, namely a fingerprint FPC and a touch FPC. The fingerprint FPC is bonded and connected to the corresponding fingerprint sensing electrode and fingerprint driving electrode, and the touch FPC is bonded and connected to the corresponding touch sensing electrode and touch driving electrode.

[0049] In another specific embodiment, the touch screen includes an FPC, which is connected to the fingerprint sensing electrode, the fingerprint driving electrode, the touch sensing electrode, and the touch driving electrode.

[0050] In this solution, the number of FPCs included in the touch screen is one. At this time, the fingerprint sensing electrode, the fingerprint driving electrode, the touch sensing electrode, and the touch driving electrode are all connected to the FCP, further reducing the cost of the touch screen.

[0051] Preferably, the fingerprint sensing electrodes and the touch sensing electrodes are arranged in parallel, and the fingerprint driving electrodes and the touch driving electrodes are arranged in parallel, so that the fingerprint sensing electrodes and the fingerprint driving electrodes are arranged crosswise to form a second capacitor, and the touch sensing electrodes and the touch driving electrodes are arranged crosswise to form a first capacitor.

[0052] Preferably, the touch screen further includes an IC, which is connected to the touch sensing electrodes, the fingerprint sensing electrodes, and the driving electrodes.

[0053] The IC is connected to the touch sensing electrodes, the fingerprint sensing electrodes, and the driving electrodes through a fingerprint FPC, a touch FPC, or an FPC. When the driving electrodes include touch driving electrodes and fingerprint driving electrodes, the IC is connected to the touch driving electrodes, the fingerprint driving electrodes, the touch sensing electrodes, and the fingerprint sensing electrodes.

[0054] The present invention is applicable to various touch screen structures with fingerprint recognition functions on the entire surface or local areas in the plane. And with the support of IC technology, it can be realized by traditional processes, and the feasibility is extremely high.

[0055] Preferably, the fingerprint sensing electrode layer and / or the driving electrode layer is a metal mesh structure.

[0056] By setting the fingerprint sensing electrode layer or the driving electrode layer as a metal mesh structure, or setting both the fingerprint sensing electrode layer and the driving electrode layer as metal mesh structures, conditions can be provided for realizing fingerprint recognition in the transparent window area, improving visual visibility.

[0057] Embodiment 2:

[0058] The difference from Embodiment 1 is that the driving electrodes are arranged crosswise with the touch sensing electrodes and can form a touch sensor, and are arranged crosswise with the fingerprint sensing electrodes and can form a fingerprint sensor.

[0059] In this solution, the driving electrodes can simultaneously perform the functions of fingerprint driving electrodes and touch driving electrodes, that is, the driving electrodes are arranged crosswise with the touch sensing electrodes to form a touch sensor to detect the touch position and realize the touch function of the touch screen, and the driving electrodes are arranged crosswise with the fingerprint sensing electrodes to form a fingerprint sensor to perform fingerprint sensing and realize the fingerprint recognition function.

[0060] Preferably, the fingerprint sensing electrodes and the touch sensing electrodes are arranged in parallel. Preferably, the driving electrodes are perpendicular to the fingerprint sensing electrodes and also perpendicular to the touch sensing electrodes.

[0061] In a specific embodiment, the touch screen further includes a fingerprint FPC and a touch FPC. The fingerprint FPC is connected to the driving electrodes and the fingerprint sensing electrodes, and the touch FPC is connected to the driving electrodes and the touch sensing electrodes.

[0062] The touch screen includes two FPCs, namely the fingerprint FPC and the touch control FPC. The fingerprint FPC is bonded to the driving electrode and the fingerprint sensing electrode, and the touch control FPC is bonded to the driving electrode and the touch control sensing electrode.

[0063] The IC is connected to the touch control sensing electrode, the fingerprint sensing electrode, and the driving electrode through the fingerprint FPC and the touch control FPC.

[0064] In another specific embodiment, the touch screen further includes an FPC, which is connected to the driving electrode, the fingerprint sensing electrode, and the touch control sensing electrode. Of course, the touch screen may also include only one FPC. In this case, the driving electrode, the fingerprint sensing electrode, and the touch control sensing electrode are all connected to the FCP, further reducing the cost of the touch screen.

[0065] In this solution, the touch screen includes only one FPC. At this time, the driving electrode, the fingerprint sensing electrode, and the touch control sensing electrode are all connected to the FCP, and the IC is connected to the touch control sensing electrode, the fingerprint sensing electrode, and the driving electrode through the FPC.

[0066] An embodiment of the second aspect of the present invention provides a touch screen terminal, including the touch screen described in any of the above embodiments.

[0067] The touch screen terminal provided by the embodiment of the second aspect of the present invention has all the beneficial effects of the touch screen described in any of the above embodiments because it has the touch screen described in any of the above embodiments, and will not be elaborated here.

[0068] In summary, the touch screen provided by the embodiment of the present invention is expanded on the basis of the GFF external touch screen, adding two layers of electrode lines (fingerprint sensing electrode layer and fingerprint driving electrode layer) on the touch screen sensor, bonding the fingerprint FPC to the corresponding fingerprint electrode layer, and realizing the fingerprint recognition function in the transparent window area through the induction generated by the contact between the finger and the touch screen and the change of the capacitance value of the driving electrode layer. At the same time, on this basis, the fingerprint sensing electrode layer and the touch control sensing electrode layer are independent, and the fingerprint driving electrode layer and the touch control driving electrode layer are integrated on the same electrode layer, thereby reducing one layer of the driving electrode layer, reducing the product thickness, and achieving thin and light.

[0069] Integrating the fingerprint driving electrode layer and the touch control driving electrode layer on the same layer can be a simple superposition of two electrode channels, or a new channel design, which can simultaneously realize the functions of fingerprint driving and touch control driving; with the support of IC technology, it can be realized in the traditional process, and the feasibility is extremely high. It not only realizes the purpose of fingerprint recognition function in the transparent window area of the touch screen, but also reduces the thickness of the touch screen by integrating the fingerprint driving electrode and the touch control driving electrode into the driving electrode layer.

[0070] In the description of the present invention, unless otherwise clearly specified and defined, the term "plurality" means two or more; unless otherwise specified or stated, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "connection" may be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the description of this specification, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0072] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0073] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A touch screen, characterized in that, The touch screen is an externally mounted touch screen, and the touch screen includes: a cover plate including a display area; a sensing electrode layer including a stacked touch sensing electrode layer and a fingerprint sensing electrode layer, the touch sensing electrode layer including touch sensing electrodes, and the fingerprint sensing electrode layer including fingerprint sensing electrodes; and a driving electrode layer located on a side of the sensing electrode layer away from the cover plate, the driving electrode layer including a substrate and driving electrodes formed on the substrate; wherein the sensing electrode layer and the driving electrode layer face the display area, a first capacitor is formed between the touch sensing electrodes and the driving electrodes, and a second capacitor is formed between the fingerprint sensing electrodes and the driving electrodes; the driving electrode layer includes insulated touch driving electrodes and fingerprint driving electrodes, the touch driving electrodes and the fingerprint driving electrodes are integrated in the same driving electrode layer, the touch sensing electrodes and the touch driving electrodes are arranged crosswise to form the first capacitor for detecting a touch position; the fingerprint sensing electrodes and the fingerprint driving electrodes are arranged crosswise to form the second capacitor for realizing fingerprint sensing.

2. The touch screen according to claim 1, wherein the touch sensing electrode layer is located between the fingerprint sensing electrode layer and the cover plate; or the fingerprint sensing electrode layer is located between the touch sensing electrode layer and the cover plate.

3. The touch screen according to claim 1 or 2, wherein the touch screen further includes a fingerprint FPC and a touch FPC, the fingerprint FPC is connected to the fingerprint sensing electrodes and the fingerprint driving electrodes, and the touch FPC is connected to the touch sensing electrodes and the touch driving electrodes; or the touch screen further includes an FPC connected to the fingerprint sensing electrodes, the fingerprint driving electrodes, the touch sensing electrodes, and the touch driving electrodes.

4. The touch screen according to claim 1 or 2, wherein the fingerprint sensing electrodes and the touch sensing electrodes are arranged in parallel; and / or the fingerprint driving electrodes and the touch driving electrodes are arranged in parallel.

5. The touch screen according to claim 1 or 2, wherein the driving electrodes and the touch sensing electrodes are arranged crosswise and can form a touch sensor, and are arranged crosswise with the fingerprint sensing electrodes and can form a fingerprint sensor.

6. The touch screen according to claim 5, wherein the fingerprint sensing electrodes and the touch sensing electrodes are arranged in parallel.

7. The touch screen according to claim 5, wherein the touch screen further includes a fingerprint FPC and a touch FPC, the fingerprint FPC is connected to the driving electrodes and the fingerprint sensing electrodes, and the touch FPC is connected to the driving electrodes and the touch sensing electrodes; or the touch screen further includes an FPC connected to the driving electrodes, the fingerprint sensing electrodes, and the touch sensing electrodes.

8. The touch screen according to claim 1 or 2, wherein the fingerprint sensing electrode layer and / or the driving electrode layer is a metal mesh structure.

9. A touch screen terminal, wherein Comprising a touch screen as described in any one of claims 1 to 8.

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