CN105094473A - Touch device and method, and method for forming touch device - Google Patents

Abstract

The invention discloses a touch device and a method and a forming method of the touch device, which can avoid error report points. An embodiment of the touch device comprises: a conductive support plate electrically coupled to a predetermined potential; the induction area is positioned above the conductive support plate and comprises a plurality of capacitive induction units; and a conducting ring, which is arranged above the conducting support plate and is arranged at the periphery of the sensing area, wherein when a touch scanning signal is provided to a current capacitive sensing unit in the capacitive sensing units, the conducting ring synchronously receives a control signal which is the same as or related to the touch scanning signal.

Description

Touch device and method, and method for forming touch device

technical field

The present invention relates to a touch device and method and a method for forming the touch device, in particular to a touch device and method capable of preventing false alarm points and a method for forming the touch device.

Background technique

In response to the needs of users and with the development of technology, touch technology has been widely used in electronic products. Generally speaking, the touch module of capacitive touch technology includes a glass layer (or protective glass), a sensing layer and a support layer from top to bottom, wherein the material of the support layer is usually metal (such as iron), and the electrical Connect to a ground potential and have an area larger than the sensing layer to play a supporting role. In other words, since the length and width of the supporting layer are respectively greater than the length and width of the sensing layer, there will be a distance between the edge of the supporting layer and the edge of the sensing layer. However, based on the above structure, the electric force lines emanating from the sensing units adjacent to the edge of the sensing layer may be connected to the support layer through an abnormal touch object on the glass layer passing through the gap, thus causing the problem of false alarm points. For example, when there are water droplets or other splashed liquids on the glass layer near the distance, the electric force lines of the sensing units on the side may pass through the glass layer, the water droplets or liquid, the glass layer, and the distance in sequence. The grounded support layer forms an electrical connection between different potentials, causing the sensing unit to produce a potential change, thereby causing false alarms of the touch points.

In addition, in some prior art, an electrostatic discharge (ESD) line is provided within the distance between the edge of the support layer and the edge of the sensing layer. Since the electrostatic discharge line is also electrically connected to the ground potential or a specific fixed potential, Therefore, it is also possible to form an electrical connection between different potentials with the sensing layer to cause false alarm points.

Contents of the invention

In view of the shortcomings of the prior art, an object of the present invention is to provide a touch device and method to improve the prior art.

The invention discloses a touch device capable of preventing false alarm points. An embodiment of the device includes: a conductive support plate, electrically coupled to a preset potential; a sensing area, located above the conductive support plate, including a plurality of capacitive sensing units; and a conductive ring, located on the The top of the conductive support plate is arranged on the periphery of the sensing area, wherein when a touch scanning signal is provided to a duty capacitive sensing unit among the capacitive sensing units, the conductive ring synchronously receives and the touch scanning A control signal with the same or related signal, so as to avoid an unexpected potential drop when the conductive ring and the current value sensing unit are electrically connected through the power line, thereby avoiding errors caused by improper charging and discharging of the current value sensing unit Report a problem.

The present invention also discloses a touch control method, which is applied to a touch device. The touch device includes a conductive support plate and a sensing area. The sensing area is located above the conductive support plate and includes a plurality of capacitive sensors. unit. An embodiment of the touch control method includes the following steps: forming a conductive ring on the periphery of the sensing area; providing a touch scanning signal to a duty capacitive sensing unit among the capacitive sensing units; A control signal that is the same as or related to the touch scanning signal is sent to the conductive ring, thereby avoiding an unexpected potential drop when the conductive ring and the current value sensing unit form an electrical connection through the power line, thereby avoiding the current value sensing unit. False alarm points caused by improper charging and discharging.

The present invention further discloses a method for forming a touch device, and an embodiment thereof includes the following steps: providing a conductive support plate, the conductive support plate is electrically coupled to a preset potential; above the conductive support plate, a A sensing area, the sensing area includes a plurality of capacitive sensing units; and a conductive ring is formed on the periphery of the sensing area above the conductive support plate, wherein when a touch scanning signal is provided to one of the capacitive sensing units When the capacitive sensing unit is active, the conductive ring synchronously receives a control signal that is the same as or related to the touch scanning signal, thereby avoiding an unexpected electrical connection between the conductive ring and the active sensing unit through the electric force line Potential drop, so as to avoid the problem of false alarm points caused by improper charging and discharging of the current value sensing unit.

Description of drawings

Regarding the characteristics, implementation and effects of the present invention, preferred embodiments are described in detail below in conjunction with the drawings.

Fig. 1a is a top view of an embodiment of the touch device of the present invention;

Figure 1b is a side view of the embodiment of Figure 1a;

2 is a top view of another embodiment of the touch device of the present invention;

FIG. 3a is a schematic diagram of an embodiment of the combination of the touch device of FIG. 2 and the circuit board;

3b is a schematic diagram of an embodiment in which the conductive ring of FIG. 3a forms a conductive loop via a circuit board;

FIG. 4 is a flowchart of an embodiment of the touch method of the present invention; and

FIG. 5 is a flowchart of an embodiment of a method for forming a touch device of the present invention.

Detailed ways

The technical terms in the following explanations refer to the customary terms in this technical field. If some terms are explained or defined in this specification, the explanations or definitions of these terms shall prevail in this specification.

The invention discloses a touch device, a touch method and a method for forming the touch device, which can avoid the problem of false alarm points caused by water droplets, other liquids or other abnormal touch objects. The present invention can be applied to a touch module (such as a capacitive touch module) or a touch device (such as a fixed or handheld touch device), and on the premise that the implementation is possible, the technical field has general Those skilled in the art can select equivalent components according to the disclosure of this specification to implement the present invention. Since some of the components included in the device of the present invention may be known components individually, the details of the known components will be omitted in the following description without affecting the full disclosure and practicability of the device invention. In addition, the method of the present invention may be performed by the device of the present invention or its equivalent. Furthermore, on the premise that the implementation is possible, those skilled in the art can selectively implement some or all of the technical features of any embodiment according to the disclosure content of the present invention and their own needs, or selectively implement multiple embodiments A combination of some or all of the technical features, thereby increasing the flexibility of implementing the present invention.

1a and 1b are schematic diagrams of an embodiment of the touch device of the present invention. As shown in FIGS. 1 a and 1 b , the touch device 100 of this embodiment includes: a conductive support plate 110 ; a sensing area 120 ; and a conductive ring 130 . The conductive support plate 110 is electrically coupled to a predetermined potential (such as a ground potential), has the function of structural support and can play the role of a ground path, and the conductive support plate 110 can be a uniform flat plate, a grid flat plate or any A structure that can provide the described function. The sensing area 120 includes a plurality of sets of capacitive sensing units 122, located above the conductive support plate 110, capable of sequentially receiving a touch scanning signal for touch detection, wherein the periphery of the sensing area 120 is adjacent to a circuit board The side 124 is formed by at least two non-circuit board adjacent sides 126, and each set of capacitive sensing units 122 includes at least one electrode plate (such as a triangular electrode plate or an electrode plate of other shapes), which is used to respond to the above-mentioned touch scanning signal and external Touched to be charged or discharged, thereby reflecting the potential change representing the touch. The conductive ring 130 is disposed on the periphery of the sensing area 120 to prevent the electric force line of the capacitive sensing unit 122 from being electrically connected to the conductive support plate 110 through an external unexpected object during the touch detection process. In this embodiment, the conductive ring 130 surrounds the plurality of non-circuit board adjacent sides 126, and is used to prevent the electric force line EL of the capacitive sensing unit 122 close to the non-circuit board adjacent sides 126 from sequentially passing through a protective glass 127 and An external unexpected object 128 (such as water droplets, other liquids, or other conductive objects not used for normal touch) forms an electrical connection with the conductive support plate 110 . When a touch scanning signal is provided to at least one of the on-duty capacitive sensing units among the capacitive sensing units 122, the conductive ring 130 is synchronously receiving a control signal that is the same as or related to the touch scanning signal, thereby making the conductive ring The potential change of 130 is synchronized with the potential change of the at least one on-duty sensing unit. More precisely, the potential change of the conductive ring 130 is in sync with the capacitive sensing unit 122 (that is, the on-duty sensing unit) that is receiving the aforementioned touch scanning signal. For example, the conductive ring 130 synchronously receives the touch scanning signal or synchronously receives a control signal with the same potential or proportional potential as the touch scanning signal, so the conductive ring 130 and the on-duty sensing unit can have a synchronous potential Change or the same potential, thereby avoiding an unexpected potential drop when the two are electrically connected through the power line EL, thereby preventing false alarm points and possible subsequent misoperations.

Based on the above, in this embodiment, the conductive support plate 110 is made of metal, such as iron, and the conductive support plate 110 can be fabricated using known techniques. In addition, the sensing area 120 includes a conductive material (such as Indium Tin Oxide (ITO)) and an insulating material, which can also be fabricated using known techniques. Furthermore, the material of the conductive ring 130 can be the same as that of the electrode plate of the sensing area 120, thereby simplifying the related process steps. However, the inventor who implements the present invention can choose different materials and process steps to manufacture the conductive ring 130 and the sensing area according to his needs. The conductive material of the electrode plate of 120. In addition, depending on the application, the touch device 100 may further include other known structural layers (such as glass layer, adhesive layer, etc.) technology and has nothing to do with the technical features of the present invention, so the relevant description is omitted here.

Please continue to refer to FIGS. 1 a and 1 b , in order to effectively isolate the capacitive sensing units 122 adjacent to the plurality of non-circuit board adjacent sides 126 from the conductive support plate 110 , the present embodiment limits the width of the conductive ring 130 properly. For example, on the same section plane, the vertical distance between the border of the conductive support plate 110 and the conductive ring 130 surrounding the plurality of non-circuit board adjacent sides 126 is a first width W1, surrounding the plurality of non-circuit board adjacent sides The width of the conductive ring 130 at 126 is a second width W2, and the first width W1 is smaller than the second width W2. In addition, the conductive ring 130 in this embodiment and the following embodiments is an integrally formed conductor, however, the inventor who implements the present invention can use a plurality of separate conductors to form the conductive ring 130 according to the requirement.

Please refer to FIG. 2, which is a schematic diagram of another embodiment of the touch device of the present invention. The difference between the touch device 200 of this embodiment and the touch device 100 of FIG. 126 , further encircling at least a portion of the circuit board adjacent to the edge 124 , thereby enhancing the isolation effect of the power line. Please also refer to FIG. 3a, which is a schematic diagram of an embodiment of the combination of the touch device and the circuit board in FIG. 2. As shown in FIG. 3a, in addition to the components shown in FIG. Including: a circuit board 310 (such as a Flexible Printed Circuit, FPC), which is arranged on the side of the circuit board adjacent to the side 124, and is used to control the potential change of the conductive ring 130 and the on-duty sensing of the multiple sets of capacitive sensing units 122 The potential change of the unit. More precisely, the circuit board 310 is used to provide the aforementioned touch scan signal or its equivalent signal to the conductive ring 130 , and sequentially provide the aforementioned touch scan signal to the plurality of sets of capacitive sensing units 122 . Here, the circuit board 310 carries one or several touch integrated circuits and components and wirings required for its operation, and is electrically connected to the multiple sets of capacitive sensing units 122 and the conductive ring 130 through the wiring layout. Since those skilled in the art can realize the production of the circuit board 310 and its components and the connection between the components according to the existing technology, the details of this part are described here without affecting the disclosure and practicability of the present invention. be omitted.

Please continue to refer to FIG. 3 a, the periphery of the circuit board 310 includes two circuit board sides 312, the two circuit board sides 312 are perpendicular to the circuit board adjacent side 124 of the sensing area 120, and the conductive ring 130 further surrounds the circuit board side 312 At least a part of each is used to prevent the electric force line of the sensing area 120 from overflowing to the conductive support plate 110 . Of course, the angle between the side 312 of the circuit board and the adjacent side 124 of the circuit board can also be an angle other than a right angle, for example, the angle between the two is between a first angle (for example 50°) and a second angle (for example 140° ), thereby increasing the implementation flexibility of the present invention. In addition, as shown in FIG. 3b, the conductive ring 130 of this embodiment can form a conductive loop through the circuit board 310, more precisely, the conductive ring 130 forms the conductive loop through the circuit layout of the circuit board 310, for example, through the circuit board 310 The circuit 314 of the first plane, a plurality of conductive vias 316 and the circuit 318 of the second plane (as shown by the dotted line in FIG. 3b ) form the conductive loop, wherein the first plane and the second plane are different planes. 130 may also form a conductive loop via a path in the same plane of the circuit board 310 . Please note that the circuit layout of the above-mentioned circuit board 310 further includes one or more integrated circuits (such as a touch integrated circuit) (not shown) in this example, and the arrangement positions and functions thereof can be determined by the implementers of the present invention.

In addition to the above-mentioned device invention, the present invention further discloses a touch control method for preventing a conductive support plate (such as the conductive support plate 110 in FIG. 1 ) and a sensing area (such as the sensing area 120 in FIG. 1 ) from passing through an external environment. Unexpected objects (such as water droplets, liquids or other conductive objects not used for normal touch) form electrical connections, which can be performed by the device of the present invention or its equivalent device, wherein the sensing area includes a plurality of capacitive sensing units, And the periphery of the sensing area is composed of a circuit board adjacent side and a plurality of non-circuit board adjacent sides. Please refer to FIG. 4 , an embodiment of the touch method includes the following steps:

Step S410: Form a conductive ring around the sensing area.

Step S420: Provide a touch scanning signal to a duty capacitive sensing unit among the capacitive sensing units.

Step S430: Provide a control signal that is the same as or related to the touch scan signal to the conductive ring.

Because those skilled in the art can understand the implementation details and changes of the method invention according to the description of the aforementioned device invention, more specifically, the technical features of the aforementioned device invention can be reasonably applied to the method invention, therefore, Under the premise of not affecting the disclosure requirements and practicability of the invention of the method, repeated and redundant descriptions are omitted here.

In addition to the above touch method, the present invention also discloses a method for forming a touch device, which is used to form the touch device of the present invention or an equivalent device thereof. As shown in Figure 5, an embodiment of the forming method includes the following steps:

Step S510: providing a conductive support plate, the conductive support plate is electrically coupled to a preset potential.

Step S520: setting a sensing area above the conductive support plate, the sensing area includes a plurality of capacitive sensing units.

Step S530: Form a conductive ring on the periphery of the sensing area above the conductive support plate, wherein when a touch scanning signal is provided to a duty capacitive sensing unit among the capacitive sensing units, the conductive ring receives synchronously A control signal that is the same as or related to the touch scan signal.

Similarly, the technical features of the aforementioned touch device and touch method can be reasonably applied to the invention of the method. Therefore, on the premise of not affecting the disclosure requirements and practicability of the invention of the method, repeated and redundant descriptions are in This is omitted. Please note that the "adjacent" mentioned in the foregoing embodiments means that the distance between two objects is less than a default value (for example, 1 cm); in addition, the "above" or similar spatial position description terms mentioned in the previous disclosure It is relative rather than absolute; moreover, in the figures disclosed above, the shape, size, proportion and sequence of steps of the components are only for illustration, and are for those skilled in the art to understand the present invention, and are not intended to limit the invention.

To sum up, the touch device and method of the present invention and the method for forming the touch device avoid improper electrical connection between the conductive support plate and the sensing area through the arrangement of the conductive ring and the control of the potential change, thereby avoiding false alarm points and the ensuing misuse problems. In addition, the conductive ring and its potential control of the present invention are easy to implement, so that the present invention not only has the effect of preventing false alarms, but also has the advantage of cost economy.

Although the embodiments of the present invention are as described above, these embodiments are not intended to limit the present invention, and those skilled in the art can make changes to the technical characteristics of the present invention according to the explicit or implicit content of the present invention. All these changes may belong to the scope of patent protection sought by the present invention. In other words, the scope of patent protection of the present invention must be defined by the scope of patent application in this specification.

Claims (15)

1. A touch device, comprising: a conductive support plate electrically coupled to a preset potential; A sensing area, located above the conductive support plate, includes a plurality of capacitive sensing units; and a conductive ring, located above the conductive support plate, and arranged on the periphery of the sensing area, Wherein when a touch scanning signal is provided to an on-duty capacitive sensing unit among the capacitive sensing units, the conductive ring synchronously receives a control signal that is the same as or related to the touch scanning signal. 2. The touch device according to claim 1, wherein the conductive support plate is made of metal, and the preset potential is a ground potential. 3 . The touch device according to claim 1 , wherein the conductive ring is used to prevent the power line of the on-duty capacitive sensing unit from being electrically connected to the conductive support plate via an external unintended object. 4 . 4 . The touch device according to claim 1 , wherein the active capacitive sensing unit comprises at least a triangular electrode plate. 5. The touch device according to claim 1, wherein the vertical distance between the border of the conductive support plate and the border of the conductive ring is a first width, the width of the conductive ring is a second width, and the first The width is less than the second width. 6. The touch device according to claim 1, further comprising: The circuit board is located on the conductive support plate and is arranged on the adjacent side of the circuit board of the sensing area to provide the touch scanning signal and the control signal, wherein the width of the circuit board is smaller than the length of the adjacent side of the circuit board. 7 . The touch device according to claim 6 , wherein the conductive ring surrounds at least a portion of adjacent sides of the circuit board and at least a portion of the circuit board. 8. The touch device according to claim 6, wherein the periphery of the circuit board includes two sides of the circuit board, and the two sides of the circuit board are perpendicular to the adjacent side of the circuit board or the angle between them is between between the first angle and the second angle. 9 . The touch device according to claim 6 , wherein the conductive ring forms a conductive loop via the circuit board. 10. The touch device according to claim 9, wherein the conductive ring forms the circuit board via a plurality of conductive contacts on the first plane, a plurality of conductive vias and a plurality of conductive contacts on the second plane of the circuit board. For the conductive loop, the first plane and the second plane are different planes. 11. The touch device according to claim 1, wherein the duty sensing unit is located at an edge of the sensing area. 12. A touch method, applied to a touch device, the touch device includes a conductive support plate and a sensing area, the sensing area is located above the conductive support plate, and includes a plurality of capacitive sensing units, the touch method Contains the following steps: forming a conductive ring on the periphery of the sensing area; providing a touch scanning signal to an on-duty capacitive sensing unit among the capacitive sensing units; and Provide a control signal that is the same as or related to the touch scanning signal to the conductive ring. 13. The touch control method according to claim 12, wherein the duty sensing unit is located at an edge of the sensing area. 14 . The touch control method according to claim 12 , wherein the conductive ring is used to prevent the power line of the on-duty capacitive sensing unit from forming an electrical connection with the conductive support plate via external unexpected objects. 15. A method for forming a touch device, comprising the following steps: providing a conductive support plate, the conductive support plate is electrically coupled to a preset potential; A sensing area is set above the conductive support plate, and the sensing area includes a plurality of capacitive sensing units; and forming a conductive ring on the periphery of the sensing area above the conductive support plate, Wherein when a touch scanning signal is provided to an on-duty capacitive sensing unit among the capacitive sensing units, the conductive ring synchronously receives a control signal which is the same as or related to the touch scanning signal.