CN102236458A - Touch control electronic device and related assembling method thereof - Google Patents

Abstract

The invention discloses a touch control electronic device and a related assembling method thereof. The touch electronic device comprises a bearing plate, a touch panel, a flexible circuit board, a sensing pad and a control circuit. The bearing plate is provided with a display screen touch area, a line concentration area and a heat bonding area. The touch panel is disposed on the touch area of the display screen of the carrier plate. The flexible circuit board is provided with a touch key area and a control circuit area. The sensing pad is arranged on the touch key area of the flexible circuit board and used as a touch key. The control circuit is arranged on the control circuit area of the flexible circuit board. The flexible circuit board is arranged and bonded on the bearing plate, wherein the touch key area is arranged on at least one of the line concentration area and the heat bonding area.

Description

Touch electronic device and related assembly method

technical field

The present invention relates to a touch-sensitive electronic device and a related assembly method thereof, in particular to a touch-sensitive electronic device and a method with a planar touch key, which uses a flexible circuit board to design the touch key on the this.

Background technique

In today's various consumer electronics markets, portable electronic products such as personal digital assistants (PDAs), mobile phones (mobile phones) and PDA mobile phones have widely used touch panels as interface tools for data communication. . Since the current design of electronic products is light, thin, short, and small, there is not enough space on the product to accommodate traditional input devices such as keyboards and mice. In addition, most physical mechanism buttons (such as thin-film metal button modules , hardware switches or resistive keys) usually have a fixed height requirement, and there must be moving parts on the surface of the electronic product to provide the actuation stroke of the mechanism key, but these requirements will increase the thickness of the electronic product and the surface is not smooth. Continuity and other problems, so the flat button design can be used to replace the traditional mechanism button.

Most of the "flat keys" commonly used at present use capacitive touch panels to simultaneously provide the touch functions of the "display touch area" and the "touch key area". Please refer to FIG. 1 , which is a schematic diagram of a touch-sensitive electronic device 100 in the prior art. In FIG. 1 , the touch-sensitive electronic device 100 includes a carrier board 1100 and a touch-sensitive panel (the touch-sensitive panel is not shown in FIG. 1 for clarity of the drawing), wherein the carrier board 1100 has A display touch area 1110 , a touch button area 1120 , a wiring area 1130 and a hot bonding area 1140 . In the current traditional practice, the touch panel is arranged on the display screen touch area 1110 and the touch button area 1120 of the carrier board 1100, that is to say, a part of the touch panel is used to display images (that is, the touch control panel disposed on the touch area 1110 of the display screen), and the other part is used as a touch key (ie, the touch control panel disposed on the touch key area 1120 ).

However, the conductive pattern design on the current capacitive touch panel (for example: conductive pattern composed of indium tin oxide (ITO) or indium zinc oxide (IZO)) is made by using very fine silver particles around the touch panel. Wires are used to connect the conductive pattern to the controller, so that the difference in capacitive sensing on the conductive pattern can be calculated by the controller to obtain the contact position. Since the touch button cannot overlap with the aforementioned "silver wire" (that is, the touch button area 1120 cannot overlap with the hub area 1130), the size of the touch button area will cause the appearance and length of the electronic product to be different. design barriers, as shown in Figure 1. And under a touch panel with a fixed size, the larger the display touch area 1110 will increase the width of the hub area 1130, so the touch key area 1120 will be compressed, but the smaller the touch key area 1120 will cause If the sensing area is too small, the sensitivity of the sensing will be poor.

Therefore, how to provide a larger display screen touch area 1110 and a larger touch key area 1120 and solve the problem of touch key sensing errors under the consideration of a fixed-size touch panel and industrial design becomes a design problem. One of the important subjects of the touch electronic device.

Contents of the invention

Therefore, one of the objectives of the present invention is to provide a touch-sensitive electronic device and its related assembly method to solve the above-mentioned problems.

The invention discloses a touch electronic device. The touch electronic device includes a carrier board, a touch panel, a flexible circuit board, a sensing pad and a control circuit. The carrier board has a display screen touch area, a wiring area and a first thermal bonding area. The touch panel is arranged on the touch area of the display screen of the carrier board for displaying images, and receives a first touch to generate a first touch signal. The flexible circuit board has at least one touch button area and a control circuit area. The sensing pad is arranged on the touch key area of the flexible circuit board, and is used as a touch key to detect a second contact to generate a second touch signal. The control circuit is arranged on the control circuit area of the flexible circuit board, and is electrically connected to the touch panel and the sensing pad, and is used to read the first touch signal and the second touch signal to respectively A first control signal and a second control signal are generated, and a first position of the first contact and a second position of the second contact are judged according to the first and second control signals. Wherein, the flexible circuit board is arranged and glued on the carrier board, and the touch button area is arranged on at least one of the wire gathering area and the first heat-adhesive area.

In a preferred embodiment, the touch button area covers the wiring area and the first heat-adhesive area.

The present invention discloses a touch-sensitive electronic device and a method for assembling a touch-sensitive electronic device, which includes the following steps: providing a carrier board, wherein the carrier board has a display screen touch area, a wire gathering area and a first A heat bonding area; a touch panel is arranged on the display screen touch area of the carrier board; a flexible circuit board is provided, wherein the flexible circuit board has at least one touch button area and a control circuit area; A sensing pad is arranged on the touch button area of the flexible circuit board, wherein the sensing pad is used as a touch button; a control circuit is arranged on the control circuit area of the flexible circuit board; the control circuit electrically connected to the touch panel and the sensing pad; and arranging and adhering the flexible circuit board on the carrier board, so that the touch button area is arranged on the hub area and the first thermal bonding at least one of the regions.

Description of drawings

FIG. 1 is a schematic diagram of a touch electronic device in the prior art.

FIG. 2 is a schematic diagram of an embodiment of the structure and assembly method of a touch-sensitive electronic device according to the present invention.

FIG. 3 (including FIG. 3A and FIG. 3B ) is a front view and a reverse view of the flexible circuit board shown in FIG. 2 .

FIG. 4 (including FIG. 4A , FIG. 4B and FIG. 4C ) is a schematic diagram of an implementation example of a specific conductive pattern of the sensing pad shown in FIG. 2 .

FIG. 5 is a flowchart of an example operation of assembling a touch-sensitive electronic device according to the present invention.

Description of reference symbols

100, 200 Touch electronic devices

1100, 2100 load board

2200 flexible circuit board

2300 Touch Panel

240 Sensing Pads

250 control circuit

2200A First plane

2200B Second plane

2100A Third Plane

2100B The fourth plane

1110, 2110 Display touch area

1130, 2130 hub area

1140 thermal bonding area

2140 The first thermal bonding area

2210 Touch button area

2220 Control circuit area

2230 Second heat bonding area

260 first contact pad

270 Second contact pad

410, 420, 430 specific conductive pattern

500～514 steps

Detailed ways

Please refer to FIG. 2 , which is a schematic diagram of an embodiment of the structure and assembly method of a touch-sensitive electronic device 200 of the present invention. As shown in FIG. 2 , the touch electronic device 200 includes (but is not limited to) a carrier board 2100 , a touch panel 2300 , a flexible circuit board 2200 , a sensing pad 240 and a control circuit 250 . The carrier board 2100 has a third plane 2100A and a fourth plane corresponding to the third plane 2100A, and the third plane 2100A is divided into a display touch area 2110 , a wiring area 2130 and a first thermal bonding area 2140 . The touch panel 2300 is disposed on the display touch area 2110 of the carrier board 2100 for displaying images and receiving a first touch to generate a first touch signal.

Moreover, the flexible printed circuit board 2200 has a first plane 2200A and a second plane 2200B relative to the first plane 2200A, please refer to FIG. 3 together. FIG. 3 (including FIG. 3A and FIG. 3B ) is shown in FIG. 2 Front and back views of the flexible circuit board 2200 of FIG. As shown in FIG. 3A , the first plane 2200A of the flexible circuit board 2200 is divided into at least one touch button area 2210 and a control circuit area 2220 . In addition, the sensing pad 240 is disposed on the touch key area 2210 of the flexible circuit board 2200, and is used as a touch key to detect a second touch to generate a second touch signal; and the control circuit 250 is disposed on the touch key area 2210. The control circuit area 2220 of the first plane 2200A is electrically connected to the touch panel 2300 and the sensing pad 240 for reading the first touch signal and the second touch signal to generate a first touch signal respectively. control signal and a second control signal, and judge a first position of the first contact and a second position of the second contact according to the first and second control signals. As shown in FIG. 3B, the second plane 2200B of the flexible circuit board 2200 includes a second thermal bonding region 2230, and the second plane 2200B is in contact with and bonded to the third plane 2100A of the carrier board 2100 (as shown in FIG. 2 ), So that the second thermal bonding area 2230 covers the first thermal bonding area 2140 .

In addition, a first contact pad (contact pad) 260 is disposed on the first thermal bonding area 2140 of the carrier board 2100 (as shown in FIG. 2 ), and a second contact pad 270 is disposed on the second thermal bonding area of the flexible circuit board 2200. On the bonding area 2230 (as shown in FIG. 3B ), the first contact pad 260 is used for thermal bonding (hot bonding) with the second contact pad 270, so the control circuit 250 can be contacted with the second contact pad 260 through the first contact pad 260. The pad 270 is electrically connected to the touch panel 2300 .

It is worth noting that the flexible circuit board 2200 is arranged and glued on the carrier board 2100, and the touch button area 2210 of the flexible circuit board 2200 is arranged at least in the hub area 2130 and the first thermal bonding area 2140 of the carrier board 2100. one above. In this embodiment, the touch key area 2210 covers the wiring area 2130 and the first thermal bonding area 2140 to maximize the sensing area of the touch key to obtain better sensing sensitivity, but the present invention does not It is not limited to this. Those skilled in the art should understand that without violating the spirit of the present invention, various changes in the coverage of the touch button area 2210 are feasible, and can be designed according to actual requirements. For example, in other embodiments, the touch button area 2210 can also cover the wiring area 2130 , the first thermal bonding area 2140 and a part of the display screen touch area 2110 , which is also covered by the present invention. category.

Please note that the above-mentioned touch-sensitive electronic device 200 can be a mobile phone, a personal digital assistant (PDA), a personal digital assistant mobile phone (PDAphone) or a smart phone (smart phone), However, the present invention is not limited thereto, and may also be other types of touch-sensitive electronic devices. Moreover, the above-mentioned sensing pad 240 can be made of a copper foil material, and the copper foil material has a specific conductive pattern, but this is not a limiting condition of the present invention.

In short, the present invention uses a flexible circuit board 2200 to design the touch button here (that is, on the touch button area 2210), because the touch button area 2210 at least covers the hub area 2130 and the first thermal Above the adhesive area 2140 , the largest touch area 2110 of the display screen can be obtained under the touch panel with a fixed size, and the sensing area of the touch key area 2210 can be greatly increased. In addition, the touch button disclosed by the present invention is a "flat button" design, which can also meet the considerations of industrial design and product appearance.

Please refer to FIG. 4 . FIG. 4 (including FIG. 4A , FIG. 4B and FIG. 4C ) is a schematic diagram of an implementation example of a specific conductive pattern of the sensing pad 240 shown in FIG. 2 . It can be seen from FIG. 4 that the specific conductive pattern of the sensing pad 240 can be a square (as shown by 410 in FIG. 4A ), a triangle (as shown by 420 in FIG. 4B ) or an irregular shape (as shown in FIG. 4C ). 430). That is to say, the specific conductive pattern of the sensing pad 240 is not limited, and those skilled in the art should understand that various changes of the specific conductive pattern of the sensing pad 240 are feasible and can be designed according to actual requirements.

Please refer to FIG. 5 , which is a flow chart of an exemplary operation of assembling a touch-sensitive electronic device according to the present invention. The method includes the following steps (please note that the following steps are not limited to be performed in the order shown in FIG. 5 if roughly the same result can be obtained):

Step 500: start.

Step 502 : Provide a carrier board, wherein the carrier board has a display touch area, a wiring area, and a first heat-adhesive area.

Step 504 : disposing a touch panel on the touch area of the display screen of the carrier board.

Step 506: Provide a flexible circuit board, wherein the flexible circuit board has at least one touch button area and a control circuit area.

Step 508 : disposing a sensing pad on the touch key area of the flexible circuit board, wherein the sensing pad is used as a touch key.

Step 510: Dispose a control circuit on the control circuit area of the flexible circuit board.

Step 512 : disposing and adhering the flexible circuit board on the carrier board, so that the touch button area is disposed on at least one of the wire gathering area and the first heat-adhesive area.

Step 514 : Electrically connect the control circuit to the touch panel and the sensing pad.

Next, how to assemble the touch-sensitive electronic device 200 will be described in conjunction with the components shown in FIGS. 2 and 3 and the steps shown in FIG. 5 . Firstly, the carrier board 2100 is provided, and the third plane 2100A of the carrier board 2100 has the display touch area 2110 , the wiring area 2130 and the first thermal bonding area 2140 (step 502 ). Next, the touch panel 2300 is disposed on the display touch area 2110 of the carrier board 2100 (step 504 ). Next, the flexible circuit board 2200 is provided, wherein the first plane 2200A of the flexible circuit board 2200 has at least the touch button area 2210 and the control circuit area 2220 (step 506 ). Next, the sensing pad 240 is disposed on the touch key area 2210 of the flexible circuit board 2200 as a touch key (step 508), and the control circuit 250 is disposed on the control circuit area 2220 of the flexible circuit board 2200 (step 510 ). Finally, the flexible circuit board 2200 is arranged and bonded on the carrier board 2100, so that the touch button area 2210 is arranged on at least one of the hub area 2130 and the first thermal bonding area 2140 (step 512), preferably Or, the touch button area 2210 covers the line gathering area 2130 and the first thermal bonding area 2140 . Finally, in step 514, the control circuit 250 is electrically connected to the touch panel 2300 (for example, using the first contact pad 260 and the second contact pad 270 to electrically connect the two), and the control circuit 250 is electrically connected to the sense pad 240 .

The steps of the above flow process are only feasible embodiments of the present invention, and are not limiting conditions of the present invention, and without violating the spirit of the present invention, this method may also include other intermediate steps or several steps may be combined Combine into a single step to make appropriate changes.

The above-mentioned embodiments are only used to illustrate the technical features of the present invention, and are not intended to limit the scope of the present invention. As can be seen from the above, the present invention provides a touch-sensitive electronic device and a related assembly method thereof. The touch button is designed here (that is, the touch button area 2210) through a flexible circuit board, because the touch button area 2210 is set/covered on the hub area 2130 and the first thermal bonding area of the carrier board 2100 At least one of the 2140, so the largest display touch area 2110 can be obtained under the fixed-size touch panel, and the sensing area of the touch key area 2210 can be greatly increased to obtain better sensing sensitivity. In addition, the touch-sensitive electronic device disclosed in the present invention can replace the traditional mechanical buttons and realize the design of "flat buttons" with its assembly method, and can also meet the considerations of industrial design and product appearance.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (11)

1. touch control electronic device includes:

One loading plate has a display screen touch area, line concentration zone and one first heat and binds the zone;

One touch panel is arranged on this display screen touch area of this loading plate, is used for show image, and receives one first contact and produce one first touching signal;

One flexible PCB has an at least one touch controlled key zone and a control circuit zone;

One sensor pad is arranged on this touch controlled key zone of this flexible PCB, in order to as touch-controlled key, produces one second touching signal to detect one second contact; And

One control circuit, be arranged on this control circuit zone of this flexible PCB, and be electrically connected at this touch panel and this sensor pad, be used for reading this first touching signal, this second touching signal producing one first controlling signal, one second controlling signal respectively, and judge the primary importance of this first contact and a second place of this second contact according to this first, second controlling signal;

Wherein, this flexible PCB setting also is bonding on this loading plate, and this touch controlled key zone is arranged at this line concentration zone and this first heat and binds in zone at least on the one.

2. touch control electronic device as claimed in claim 1, wherein this flexible PCB has one first plane and with respect to one second plane on this first plane, and this first plane is divided into this touch controlled key zone and this control circuit zone.

3. touch control electronic device as claimed in claim 2, wherein this loading plate has one the 3rd plane and with respect to Siping City's face on the 3rd plane, and the 3rd plane is divided into this display screen touch area, this line concentration zone and this first heat and binds the zone; And this second plane of this flexible PCB contacts with the 3rd plane of this loading plate and binds.

4. touch control electronic device as claimed in claim 2, wherein this flexible PCB also comprises one second heat bonding zone, is positioned on this second plane, and is covered on this first heat bonding zone.

5. touch control electronic device as claimed in claim 4, it also comprises:

One first contact mat is arranged at this first heat and binds on the zone; And

One second contact mat is arranged at this second heat and binds on the zone;

Wherein, this first contact mat and this second contact mat bind, and this control circuit is electrically connected to this touch panel by this first contact mat and this second contact mat.

6. touch control electronic device as claimed in claim 1, wherein this sensor pad is made of a Copper Foil material, and this Copper Foil material has a particular conductivity pattern.

7. touch control electronic device as claimed in claim 1, it is a mobile phone, a personal digital assistant, a PDA-phone or an intelligent mobile phone.

One kind the assembling one touch control electronic device method, it comprises following steps:

One loading plate is provided, and wherein this loading plate has a display screen touch area, line concentration zone and one first heat bonding zone;

One touch panel is arranged on this display screen touch area of this loading plate;

One flexible PCB is provided, and wherein this flexible PCB has an at least one touch controlled key zone and a control circuit zone;

One sensor pad is arranged on this touch controlled key zone of this flexible PCB, wherein this sensor pad is as touch-controlled key;

One control circuit is arranged on this control circuit zone of this flexible PCB and and is electrically connected to this touch panel and this sensor pad this control circuit; And

With this flexible PCB setting and be bonding on this loading plate,, this touch controlled key zone binds in zone at least on the one so that being arranged at this line concentration zone and this first heat.

9. method as claimed in claim 8, wherein this flexible PCB has one first plane and with respect to one second plane on this first plane, and this first plane is divided into this touch controlled key zone and this control circuit zone; This loading plate has one the 3rd plane and with respect to Siping City's face on the 3rd plane, and the 3rd plane is divided into this display screen touch area, this line concentration zone and this first heat and binds the zone; And this method also comprises step:

Make this two plane contact of this flexible PCB and be bonding on the 3rd plane of this loading plate.

10. method as claimed in claim 9, wherein this flexible PCB also comprises one second heat bonding zone, is positioned on this second plane; And this method also comprises step:

With this flexible PCB setting and be bonding on this loading plate, be covered in this first heat and bind on zone so that this second heat is binded zone.

11. method as claimed in claim 10, wherein this touch control electronic device also includes one first contact mat and one second contact mat, is arranged at this first heat respectively and binds regional going up and this second hot bonding on the zone; And this method also comprises step:

With this flexible PCB setting and be bonding on this loading plate, and bind this first contact mat and this second contact mat; And

Utilize this first contact mat and this second contact mat that this control circuit is electrically connected to this touch panel.

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