CN106953628A - A new design method of touch screen keys - Google Patents

Abstract

The invention discloses a novel touch screen button design method, which includes GND, a button connection interface, a touch chip and a transfer cable. The beneficial effects of the present invention are: by realizing the conductive traces corresponding to the patterns of the buttons on the bottom of the cover plate, the design is simple, several buttons can be independent buttons and the respective traces are separated to form independent buttons; or a single trace can be shared as a common button. wires, and other wires are separated independently to form a composite button. At the same time, the conductive wires and patterns from the silk screen to the cover plate must be insulated after completion, and a circle of GND is designed to prevent external ESD from affecting the sensitivity of the buttons. During the use process, the button does not report the dot and other bad phenomena, the button touch performance is good, and it is suitable for mass production.

Description

A new design method of touch screen keys

technical field

The invention relates to a key design method, in particular to a novel touch screen key design method, which belongs to the field of liquid crystal display module touch key design.

Background technique

With the development of touch display technology, more and more products with touch buttons are used, especially in the fields of wireless electronic consumer goods such as mobile phones. However, more and more consumers have requirements for electronic products that are light and thin, and at the same time have higher and higher requirements for the sensitivity of keys.

In order to meet the demand for thinness and lightness, the design of the entire product requires each component to be thin and light. The usual touch button design is realized by double-layer FPC, and double-sided paste is used on the cover plate. On the one hand, it is difficult to reduce the thickness. On the other hand, it is affected by the durability of the double-sided adhesive. Changes in the external environment make the viscosity worse, which may detach from the cover and affect the key touch performance.

Contents of the invention

The purpose of the present invention is to provide a novel touch screen button design method in order to solve the above problems, which can well solve the above problem of thicker thickness, and at the same time make the touch performance more stable and durable.

The present invention achieves the above object through the following technical solutions: a novel touch screen button design method, including GND, button connection interface, touch chip and transfer cable, and the GND is arranged around the coupling capacitor formed by the silk screen conductive wiring pattern , the button connection interface is connected to the transfer FPC, the binding interface between the button connection interface and the transfer FPC is designed on both sides of the cover, and the touch chip is installed on the main FPC of the display touch module , the touch chip controls the hardware of the cover button through conductive wires, one end of the transfer cable is bound to the connection interface of the cover button, and the other end of the transfer cable is connected to the display touch panel The main FPC of the module.

Preferably, in order to prevent the external ESD from affecting the key sensitivity, the GND isolates the external ESD from the coupling capacitance of the key.

Preferably, in order to be far away from the external ESD and at the same time to protect the circuit well, the conductive traces connected to the button connection interface are guaranteed to be at least 0.1MM and all of them run inside.

Preferably, in order not to increase the overall thickness after binding the FPC at the connection interface, the button connection interface is designed to bind and transfer the FPC to the redundant space on both sides of the cover plate.

Preferably, in order to realize the hardware control of the cover panel keys by the main control touch chip, the transfer cable is connected to the touch chip through the main FPC of the display touch module.

A novel touch screen key design method, it comprises the following steps:

Step 1. Silk-screen the conductive traces of the buttons under the button area of the cover to form a coupling capacitor (it can be realized by silk-screening silver paste or other silk-screening methods). The pattern of the buttons can be flexibly designed, as long as it meets the needs of the touch IC used. Quantity is enough.

Step 2, connect the buttons at different positions to a fixed area through wiring to form a connection interface (can be set as a binding interface or other types of interfaces), which is convenient for connecting with the main control touch chip.

Step 3, design the transfer FPC cable, one end is connected to the button interface, and the other end is connected to the touch chip on the main FPC. The touch chip can control the touch of the button through mutual capacitance mode or self-capacity mode.

The beneficial effects of the present invention are: the design method of the novel touch screen button is reasonable in design, and the design is simple by realizing the conductive wiring of the corresponding pattern of the button at the bottom of the cover plate, and several buttons can be independent buttons, and the respective wirings are separated to form independent buttons; It is also possible to share one trace as a common trace, while the other traces are separated independently to form a composite button. At the same time, the conductive traces and patterns printed on the cover plate are insulated after completion, and a circle of GND is designed to prevent external ESD. The impact on the sensitivity of the keys, there will be no adverse phenomena such as the key not reporting the point during use, and the key touch performance is good, suitable for mass production.

Description of drawings

Fig. 1 is the schematic diagram of the design example of cover plate button pattern of the present invention;

Fig. 2 is a schematic diagram of key wiring and connection interface of the present invention;

Fig. 3 is a schematic diagram of the overall implementation scheme of the present invention;

In the figure: 1. GND, 2. Button connection interface, 3. Touch chip and 4. Transfer cable.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-3, a new touch screen key design method, including GND1, key connection interface 2, touch chip 3 and transfer cable 4, the GND1 is set around the coupling capacitor formed by the silk screen conductive trace pattern, The GND1 isolates the coupling capacitance of the external ESD from the button to prevent the impact of the external ESD on the sensitivity of the button. The button connection interface 2 is connected to the transfer FPC, and the button connection interface 2 is connected to the binding interface of the transfer FPC. Designed to both sides of the cover plate, the conductive traces connected to the button connection interface 2 are guaranteed to be at least 0.1MM and all run on the inside at the same time, which is far away from the external ESD and can protect the circuit well. The button connection interface 2 It is designed to bind the transfer FPC in the extra space on both sides of the cover plate. After binding the FPC at the connection interface, the overall thickness will not be increased. The touch chip 3 is installed on the main FPC of the display touch module. The control chip 3 controls the hardware of the cover button through conductive wiring, one end of the transfer cable 4 is bound to the cover button connection interface 2, and the other end of the transfer cable 4 is connected to the display touch panel. At the main FPC of the module, the transfer cable 4 is connected to the touch chip 3 through the main FPC of the display touch module, so as to realize the hardware control of the main control touch chip to the cover key.

Described novel touch screen button design method comprises the following steps:

Step 1. Silk-screen the conductive traces of the buttons under the button area of the cover to form a coupling capacitor (it can be realized by silk-screening silver paste or other silk-screening methods). The pattern of the buttons can be flexibly designed, as long as it meets the needs of the touch IC used. Quantity is enough.

Step 2, connect the buttons at different positions to a fixed area through wiring to form a connection interface (can be set as a binding interface or other types of interfaces), which is convenient for connecting with the main control touch chip.

Step 3, design the transfer FPC cable, one end is connected to the button interface, and the other end is connected to the touch chip 3 on the main FPC. The touch chip 3 can control the touch of the button through mutual capacitance mode or self-capacity mode.

Working process: When using this new type of touch screen button, first realize the conductive traces corresponding to the pattern on the bottom of the cover plate. Several buttons can be independent buttons and the respective traces are separated to form independent buttons, or they can share a single trace. As a common trace, other traces are separated independently to form a composite key. At the same time, the conductive traces and patterns printed on the cover plate are insulated after completion, and then the key traces are respectively led out to any side of the edge of the cover plate. The side is used as the connection interface to connect to the FPC, and finally an FPC is designed as the interface to transfer the cable, so that the main control touch chip can control the hardware of the cover button.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. a novel touch screen button design method, characterized in that: the design method may further comprise the steps: Step 1, Silk-screen the button conductive traces under the button area of the cover to form a coupling capacitor; Step 2, connect the buttons at different positions to a fixed area through wiring to form a connection interface; Step 3, design the transfer FPC cable, one end is connected to the button interface, and the other end is connected to the touch chip on the main FPC. 2 . The novel touch screen button design method according to claim 1 , wherein the touch chip can control the touch of the button through a mutual capacitance mode or a self-capacitance mode. 3 . 3. A novel touch screen button design method according to claim 1, characterized in that: GND is arranged around the coupling capacitor formed by the silk screen conductive wiring pattern, the button connection interface is connected with the transfer FPC, and the button connection interface The binding interface with the transfer FPC is designed on both sides of the cover, the touch chip is installed on the main FPC of the display touch module, and the touch chip controls the hardware of the cover button through conductive traces One end of the transfer cable is bound to the cover button connection interface, and the other end of the transfer cable is connected to the main FPC of the display touch module. 4. A novel touch screen button design method according to claim 3, characterized in that: the GND isolates the external ESD from the coupling capacitance of the button. 5. A novel touch screen button design method according to claim 4, characterized in that: the conductive traces connected to the button connection interface are guaranteed to be at least 0.1MM, and all of them run inside. 6. A novel touch screen button design method according to claim 5, characterized in that: the button connection interface is designed to be bound and connected to the FPC in the redundant space on both sides of the cover plate. 7 . The novel touch screen button design method according to claim 6 , wherein the transfer cable is connected to the touch chip through the main FPC of the display touch module. 7 .