Capacitive screen and terminal device with channel switching function

Abstract

The present invention relates to the field of capacitive screens, and in particular to a capacitive screen and terminal device with a channel switching function. The conductive layer of the capacitive screen of the present invention includes a vertically arranged sensing electrode layer and a driving electrode layer; the sensing electrode layer includes a first sensing electrode and a second sensing electrode arranged at intervals; the driving electrode layer includes a first driving electrode and a second driving electrode arranged at intervals; the capacitive screen also includes an MCU module for controlling the working states of the first / second sensing electrodes and the first / second driving electrodes, and the MCU module is electrically connected to the sensing electrode layer and the driving electrode layer, respectively. The present invention forms two groups of different touch programs by arranging a group of new second sensing electrodes and a second driving electrode at intervals on the conventional first sensing electrodes and the first driving electrodes of the conductive layer, and controlling their working states respectively through the MCU module, so as to realize the switching function of the two groups of channels without adding additional sensing and driving materials, thereby saving hardware maintenance costs.

Description

Technical Field

[0001] The present invention relates to the field of capacitive screens, and in particular to a capacitive screen and terminal equipment with a channel switching function. Background Art

[0002] With the rapid development and application of information technology, wireless communication and information appliances, more and more intelligent electronic products are integrated into people's lives. As a good medium for human-computer interaction, touch screens have achieved rapid development. Touch screens are mainly divided into resistive, capacitive and surface infrared touch screens. Among them, capacitive touch screens have become the market center and focus of touch screens due to their simple structure, high light transmittance, friction resistance, resistance to changes in ambient temperature and humidity, and ability to achieve multi-point touch.

[0003] Capacitive screens generally include a touch panel, a glass substrate, and an electrode layer; the electrode layer is disposed on the glass substrate, and the electrode layer includes a plurality of sensing electrodes extending along a first direction and a plurality of driving electrodes extending along a second direction, and the sensing electrodes and the driving electrodes are interlaced to form a sensing array. The sensing electrodes and driving electrodes of existing capacitive screens are both single-channel. Once a functional problem occurs on the touch screen, the only solution is to scrap it and replace it with a new capacitive screen, which increases the maintenance cost. Summary of the invention

[0004] In response to the above technical problems, the present invention provides a capacitive screen and terminal device with a channel switching function. By setting two groups of switchable sensing electrodes and driving electrode channels, the functional backup of the capacitive screen is achieved, which helps to solve the maintenance problem of malfunction of the capacitive screen due to damage to some channels and reduce maintenance costs.

[0005] The present invention adopts the following technical solutions:

[0006] A capacitive screen with a channel switching function comprises a cover plate, a first adhesive layer and a conductive layer which are stacked in sequence, wherein: the conductive layer comprises a sensing electrode layer and a driving electrode layer which are vertically arranged; the sensing electrode layer comprises a first sensing electrode and a second sensing electrode which are arranged in a staggered interval; the driving electrode layer comprises a first driving electrode and a second driving electrode which are arranged in a staggered interval; the capacitive screen further comprises an MCU module which controls the working states of the first sensing electrode, the second sensing electrode, the first driving electrode and the second driving electrode, and the MCU module is electrically connected to the sensing electrode layer and the driving electrode layer respectively.

[0007] Furthermore, the capacitive screen includes a sensing IC module and a driving IC module electrically connected to the MCU module, wherein: the first sensing electrode and the second sensing electrode are respectively connected to the first sensing pin and the second sensing pin of the sensing IC module through the sensing channel FPC; the first driving electrode and the second driving electrode are respectively connected to the first driving pin and the second driving pin of the driving IC module through the driving channel FPC; the MCU module controls the first sensing electrode, the second sensing electrode, the first driving electrode and the second driving electrode by controlling the working states of the first sensing pin, the second sensing pin, the first driving pin and the second driving pin.

[0008] Furthermore, the first sensing electrode and the second sensing electrode are arranged in parallel and insulated from each other; the first driving electrode and the second driving electrode are arranged in parallel and insulated from each other.

[0009] Furthermore, the capacitive screen also includes a second adhesive layer, and the second adhesive layer insulates and separates the sensing electrode layer from the driving electrode layer.

[0010] Further, the intersections of the first sensing electrode and / or the second sensing electrode and the first driving electrode and / or the second driving electrode are insulated and connected via a metal bridge structure.

[0011] Furthermore, the patterns of the sensing electrode layer and the driving electrode layer include diamond, stripe, and rectangle.

[0012] Furthermore, the conductive layer is a nanosilver conductive layer, an ITO conductive layer, or a metal grid conductive layer.

[0013] Furthermore, the conductive layer is composed of double-sided conductive glass and single-layer double-sided conductive films respectively located on both sides of the double-sided conductive glass, and the single-layer double-sided conductive films respectively constitute the driving electrode layer and the sensing electrode layer.

[0014] Furthermore, the first adhesive layer is an OCA optical adhesive layer.

[0015] The present invention also provides a terminal device, comprising the above-mentioned capacitive screen with channel switching function.

[0016] The capacitive screen with channel switching function of the present invention realizes the switching of two groups of channels and the functional backup of the capacitive screen by arranging a group of new second sensing electrodes and second driving electrodes on the conventional first sensing electrodes and first driving electrodes of the conductive layer at intervals, and controlling the working states of the first sensing electrodes, the first driving electrodes, the second sensing electrodes, and the second driving electrodes respectively through the MCU module. The present invention sets two groups of channels by adjusting the conductive layer pattern design, and can realize the switching function of the two groups of channels without adding additional sensing and driving materials, that is, without increasing the hardware cost of the touch screen, thereby saving the hardware maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a capacitive screen with a channel switching function of the present invention;

[0019] Figure 2 It is a cross-sectional schematic diagram of a first embodiment of a capacitive screen with a channel switching function of the present invention;

[0020] Figure 3 It is a cross-sectional schematic diagram of a second embodiment of a capacitive screen with a channel switching function of the present invention;

[0021] In the figure: 1-cover plate, 2-first bonding layer, 3-conductive layer, 4-sensing electrode layer, 41-first sensing electrode, 42-second sensing electrode, 5-driving electrode layer, 51-first driving electrode, 52-second driving electrode, 6-sensing channel FPC, 7-sensing IC module, 8-driving channel FPC, 9-driving IC module, 10-MCU module, 11-second bonding layer, 12-metal bridge structure. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0023] A capacitive screen with channel switching function, such as Figure 1 As shown, the capacitive screen comprises a cover plate 1, a first adhesive layer 2 and a conductive layer 3 which are stacked in sequence, wherein: the conductive layer 3 comprises a sensing electrode layer 4 and a driving electrode layer 5 which are vertically arranged; the sensing electrode layer 4 comprises first sensing electrodes 41 and second sensing electrodes 42 which are arranged in a staggered manner; the driving electrode layer 5 comprises first driving electrodes 51 and second driving electrodes 52 which are arranged in a staggered manner; the capacitive screen further comprises an MCU module 10 for controlling the working states of the first sensing electrodes 41, the second sensing electrodes 42, the first driving electrodes 51 and the second driving electrodes 52, and the MCU module 10 is electrically connected to the sensing electrode layer 4 and the driving electrode layer 5, respectively.

[0024] Specifically, the capacitive screen includes a sensing IC module 7 and a driving IC module 9 electrically connected to the MCU module 10, wherein: the first sensing electrode 41 and the second sensing electrode 42 are respectively connected to the first sensing pin and the second sensing pin (not shown in the figure) of the sensing IC module 7 through the sensing channel FPC 6; the first driving electrode 51 and the second driving electrode 52 are respectively connected to the first driving pin and the second driving pin (not shown in the figure) of the driving IC module 9 through the driving channel FPC8; the MCU module 10 controls the first sensing electrode 41, the second sensing electrode 42, the first driving electrode 51 and the second driving electrode 52 by controlling the working states of the first sensing pin, the second sensing pin, the first driving pin and the second driving pin.

[0025] The capacitive screen with channel switching function of the present invention can form two different touch programs by arranging a group of new second sensing electrodes 42 and second driving electrodes 52 at intervals on the conventional first sensing electrodes 41 and first driving electrodes 51 of the conductive layer 3, and correspondingly adding a group of pins to the sensing IC module 7 and the driving IC module 9. By writing program codes, the two groups of driving electrodes and sensing electrodes can be controlled to work respectively, and the two different touch programs can be burned into the MCU module. The channel pins of the sensing and driving IC modules are controlled respectively by the MCU module to realize the switching of the two groups of channels and the functional backup of the capacitive screen. The present invention sets two groups of channels by adjusting the conductive layer pattern design, and can conveniently start the backup remedy plan by software upgrade in the case of failure of the capacitive screen without adding additional sensing and driving materials, that is, without increasing the hardware cost of the touch screen, to realize the switching function of the two groups of channels, thereby saving the hardware maintenance cost.

[0026] It should be noted that the program code written in the present invention to realize the two groups of driving electrodes and sensing electrodes working separately can be implemented by conventional software programming means in the art, and the present invention does not make specific limitations. The present invention adjusts the pattern design, adds a group of channels to the sensing electrode and driving electrode layers respectively, and correspondingly adds pins to the IC module to realize the function switching of the channels. The specific program code and the software involved are all prior art, which only play a role in selecting the channels. The present invention is not a technical solution proposed for the software itself.

[0027] Specifically, the first sensing electrodes 41 and the second sensing electrodes 42 are arranged in parallel and insulated from each other; the first driving electrodes 51 and the second driving electrodes 52 are arranged in parallel and insulated from each other. The first sensing electrodes 41 and the second sensing electrodes 42 and the first driving electrodes 51 and the second driving electrodes 52 are arranged in parallel and staggered with each other, and each electrode is insulated from each other and does not contact each other, and will not affect each other. More specifically, the present invention does not specifically limit the number of each first / second sensing / driving electrode in the sensing electrode layer 4 and the driving electrode layer 5 and the spacing between adjacent electrodes. They can be allocated according to the product size or selected according to needs. When any group of the first sensing / driving electrodes and the second sensing / driving electrodes are used, the finger touch function can be realized at any position through the capacitor unit.

[0028] Specifically, as a first embodiment of the present invention, Figure 1 and Figure 2 As shown, the capacitive screen includes a cover plate 1, a first adhesive layer 2, a sensing electrode layer 4, a second adhesive layer 11, and a driving electrode layer 5 which are stacked in sequence. In this embodiment, the sensing electrode layer 4 and the driving electrode layer 5 are insulated and separated by the second adhesive layer 11. The first sensing electrode 41 and the second sensing electrode 42 on the sensing electrode layer 4 are arranged parallel to each other and are insulated and do not contact each other; the first driving electrode 51 and the second driving electrode 52 on the driving electrode layer 5 are arranged parallel to each other and are insulated and do not contact each other; due to the arrangement of the second adhesive layer 11, the sensing electrode layer 4 and the driving electrode layer 5 are perpendicular to each other and are insulated and do not contact each other.

[0029] Specifically, as a second embodiment of the present invention, Figure 1 and Figure 3 As shown, it comprises a cover plate 1, a first adhesive layer 2 and a conductive layer 3 which are stacked in sequence, the conductive layer 3 comprises a sensing electrode layer 4 and a driving electrode layer 5 which are vertically arranged; the sensing electrode layer 4 comprises first sensing electrodes 41 and second sensing electrodes 42 which are arranged in a staggered manner; the driving electrode layer 5 comprises first driving electrodes 51 and second driving electrodes 52 which are arranged in a staggered manner; in order to achieve insulation at the vertical intersection of the sensing electrodes and the driving electrodes, the intersection of the first sensing electrodes 41 and / or the second sensing electrodes 42 and the first driving electrodes 51 and / or the second driving electrodes 52 is connected via a metal bridge structure 12.

[0030] Specifically, the patterns of the sensing electrode layer 4 and the driving electrode layer 5 include diamond, strip, and rectangle. Of course, the patterns of the sensing electrode layer 4 and the driving electrode layer 5 can be adjusted according to actual usage. The diamond, strip, and rectangle patterns are only a preferred implementation and are not intended to be a specific limitation on the electrode layer pattern of the present invention.

[0031] Specifically, the conductive layer 3 is a nanosilver conductive layer or an ITO conductive layer or a metal mesh conductive layer. More specifically, the conductive layer is a conductive medium coated and cured on a substrate, such as a conductive layer coated and cured on the surface of a substrate. The conductive paste is a mixture of one or more of silver nanowires, gold nanowires, copper nanowires, nickel nanowires, silver nanoparticles, gold nanoparticles, copper nanoparticles, and nickel nanoparticles. The substrate is any one of PET, COP, TAC, PVC, PI, and PE. Those skilled in the art can make a selection based on the actual application conditions of the capacitive screen, etc. The present invention does not make specific limitations, and the above-mentioned substrates are not used as specific limitations on this solution.

[0032] More specifically, as an embodiment of the present invention, the substrate of the conductive layer is double-sided conductive glass, a single layer of double-sided conductive film is provided on the front and back sides of the substrate as electrodes, and the driving electrode layer and the sensing electrode layer are respectively located on the two sides of the substrate. This solution has a simple structure and saves costs.

[0033] Specifically, the first bonding layer 2 is an OCA optical adhesive layer, and the second bonding layer 11 is an OCA optical adhesive layer. OCA optical adhesive has both excellent bonding effect and good insulation effect, so that the electrodes perpendicular to each other located in the sensing electrode layer 4 and the driving electrode layer 5 are not in contact, effectively insulated, and prevent the occurrence of short circuit.

[0034] The present invention also provides a terminal device, including the capacitive screen with channel switching function. Specifically, the terminal device is a mobile phone, a tablet computer, a notebook computer, an electronic paper book, an advertising machine, a conference machine, an electronic blackboard and other devices.

[0035] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A capacitive touch screen with channel switching function, characterized in that: It comprises a cover plate, a first adhesive layer and a conductive layer which are stacked in sequence, wherein: The conductive layer includes a sensing electrode layer and a driving electrode layer arranged vertically; The sensing electrode layer includes first sensing electrodes and second sensing electrodes arranged in a staggered manner; The driving electrode layer includes first driving electrodes and second driving electrodes arranged in a staggered manner; The capacitive screen further includes an MCU module for controlling the working states of the first sensing electrode, the second sensing electrode, the first driving electrode, and the second driving electrode, and the MCU module is electrically connected to the sensing electrode layer and the driving electrode layer respectively; The capacitive screen includes a sensing IC module and a driving IC module electrically connected to the MCU module, wherein: The first sensing electrode and the second sensing electrode are respectively connected to a first sensing pin and a second sensing pin of the sensing IC module through a sensing channel FPC; The first driving electrode and the second driving electrode are respectively connected to a first driving pin and a second driving pin of a driving IC module through a driving channel FPC; The MCU module controls the first sensing electrode, the second sensing electrode, the first driving electrode and the second driving electrode by controlling the working states of the first sensing pin, the second sensing pin, the first driving pin and the second driving pin; The first sensing electrode and the second sensing electrode are arranged in parallel and insulated from each other; the first driving electrode and the second driving electrode are arranged in parallel and insulated from each other; The capacitive screen further comprises a second bonding layer, wherein the second bonding layer insulates and separates the sensing electrode layer from the driving electrode layer; A group of new second sensing electrodes and a second driving electrode are arranged alternately on the conventional first sensing electrodes and the first driving electrodes of the conductive layer, and a group of pins are correspondingly added to the sensing IC module and the driving IC module to form two different touch programs. By writing program codes, the two groups of driving electrodes and sensing electrodes are controlled to work respectively, and the two different touch programs are burned into the MCU module. The channel pins of the sensing and driving IC modules are controlled respectively through the MCU module to realize the switching of the two groups of channels and the functional backup of the capacitive screen, wherein the program code is the program code written to realize the two groups of driving electrodes and sensing electrodes working separately.

2. The capacitive touch screen with channel switching function according to claim 1, characterized in that: The intersections of the first sensing electrode and / or the second sensing electrode and the first driving electrode and / or the second driving electrode are insulated and connected via a metal bridge structure.

3. The capacitive touch screen with channel switching function according to claim 1, characterized in that: The patterns of the sensing electrode layer and the driving electrode layer include diamond, stripe and rectangle.

4. The capacitive touch screen with channel switching function according to claim 1, characterized in that: The conductive layer is a nano silver conductive layer, an ITO conductive layer or a metal grid conductive layer.

5. The capacitive touch screen with channel switching function according to claim 1, characterized in that: The conductive layer is composed of double-sided conductive glass and single-layer double-sided conductive films respectively located on both sides of the double-sided conductive glass, and the single-layer double-sided conductive films respectively constitute a driving electrode layer and a sensing electrode layer.

6. The capacitive touch screen with channel switching function according to claim 1, characterized in that: The first bonding layer is an OCA optical adhesive layer.

7. A terminal device, characterized in that: A capacitive screen with a channel switching function comprising any one of claims 1-6.

Images