TWI510998B - Electronic device - Google Patents

Description

Electronic device

The present invention relates to an electronic device.

At present, electronic devices such as mobile phones, computers, and displays are usually equipped with a Flexible Printed Circuit (FPC), and different parts of the circuit can be connected by a flexible circuit board. For example, an electronic device with a touch function usually connects a touch panel to a touch driver through a flexible circuit board. The flexible circuit board will be equipped with a reinforcing plate to increase the strength of the flexible circuit board and prevent its key parts from being bent or damaged. However, the reinforcing board in the conventional flexible circuit board only has a reinforcing effect, and cannot provide an additional function to the electronic device.

In view of this, it is necessary to provide an electronic device. The electronic device includes an insulating substrate for receiving an external touch operation, a flexible circuit board, and a driver. The insulating substrate is for receiving an external touch action. The flexible circuit board includes a reinforcing plate. The reinforcing plate is used to enhance the robustness of the flexible circuit board. The driver is used to sense the change of the electrical signal on the reinforcing plate. The reinforcing plate is made of a conductive metal. The reinforcing plate is electrically connected to the driver. The reinforcing plate is laminated on the insulating substrate. The reinforcing plate, the insulating substrate and the driver together form a single-touch capacitive sensing system. When a conductive object touches a position on the insulating substrate corresponding to the reinforcing plate, a capacitance of the reinforcing plate changes, and the changed electrical signal is transmitted to the driver to generate a touch. Touch the signal.

Compared with the prior art, the reinforcing plate in the electronic device provided by the present invention not only has a reinforcing effect, but also has a function of sensing a touch.

100‧‧‧Electronic devices

100a‧‧‧Border area

100b‧‧‧ display area

110‧‧‧protective glass

120‧‧‧Touch panel

130‧‧‧Display module

140‧‧‧Main control board

150‧‧‧Back cover

160‧‧‧Soft circuit board

170‧‧‧Touch Driver

161‧‧‧ reinforcing plate

162‧‧‧Protective layer

163‧‧‧Electrical circuit

164‧‧‧Substrate

165‧‧‧Electromagnetic wave mask

162a‧‧‧first through hole

164a‧‧‧second through hole

1631‧‧‧First wire

1632‧‧‧second wire

1633‧‧‧ Third wire

101‧‧‧ function keys

1 is a schematic diagram of an electronic device provided by an embodiment of the present invention.

2 is an exploded view of the electronic device of FIG. 1.

Figure 3 is a cross-sectional view showing the first embodiment of the present invention taken along the line V-V of Figure 2;

Figure 4 is a top plan view of the flexible circuit board as viewed from the side near the substrate.

Fig. 5 is a plan view of the flexible circuit board viewed from a side close to the protective layer.

FIG. 6 is a schematic cross-sectional view of the electronic device after assembly.

FIG. 7 is a schematic cross-sectional structural view of another embodiment of the electronic device after assembly.

Figure 8 is a cross-sectional view showing the second embodiment of the present invention taken along the line V-V of Figure 2;

9 is a plan view of the flexible circuit board viewed from a side close to the substrate when the driver is disposed on the main control board in the electronic device.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, an electronic device 100 according to an embodiment of the present invention includes a bezel area 100a and a display area 100b surrounded by the bezel area 100a. The display area 100b is generally an area in which the electronic device 100 displays an image and receives a touch. The border A function key 101 is provided in the area 100a. In this embodiment, the electronic device 100 may be a portable device such as a smart phone, a personal digital assistant, or a tablet computer.

As shown in FIG. 2, it is an exploded view of the electronic device 100. The electronic device 100 includes a protective glass 110 , a touch panel 120 , a flexible circuit board 160 , a driver 170 , a display module 130 , a main control board 140 , and a back cover 150 .

The cover glass 110 is located at the outermost side of the electronic device 100 for protection. The touch panel 120 is electrically connected to the main control board 140 by the flexible circuit board 160. The touch panel 120 is configured to detect a touch operation applied on the touch panel 120. The touch panel 120 is disposed corresponding to the display area 100b. The display module 130 is configured to display a screen, and is also disposed corresponding to the display area 100b. The display module 130 can be, but not limited to, a liquid crystal display (LCD) or an organic light emitting display (OLED). The main control board 140 is configured to control electrical signals in the electronic device 100, such as touch scan signals. The back cover 150 is opposite to the cover glass 110 and covers the outermost side of the electronic device 100 for protection.

As shown in FIG. 3, it is a schematic cross-sectional view of the flexible circuit board 160 formed along the V-V cutting line of FIG. The flexible circuit board 160 includes a reinforcing plate 161, a protective layer 162, a conductive line 163, and a substrate 164 which are sequentially stacked. The protective layer 162 covers and protects the conductive traces 163. The conductive line 163 is used to transmit an electrical signal. A first through hole 162a is defined in the protective layer 162. A plurality of second through holes 164a are defined in the substrate 164. The reinforcing plate 161 is used to enhance the robustness of the flexible circuit board 160. The reinforcing plate 161 is made of a conductive metal, such as a steel plate.

The driver 170 is configured to sense a change of the electrical signal on the reinforcing plate 161, receive the touch sensing signal on the touch panel 120 to the main control board 140, and generate a touch signal to the touch panel 120. The driver 170 is electrically connected to the reinforcing plate 161. The drive 170 may be disposed on the protective glass 110, the display module 130 or the main control board 140, or integrated in the flexible circuit board 120. In the present embodiment, the driver 170 is integrated in the flexible circuit board 120. Specifically, the driver 170 is disposed on a side of the substrate of the flexible circuit board 160 away from the reinforcing plate 161.

Referring to FIG. 4 together, FIG. 4 is a plan view of the flexible circuit board 160 as viewed from a side close to the substrate 164. The conductive line 163 includes a first wire 1631, a second wire 1632, and a third wire 1633. The first wire 1631 is electrically connected to the reinforcing plate 161 by the first through hole 162a, and the second wire 1632 extends to the touch panel 120 and is electrically connected to the touch panel 120. The three wires 1633 electrically connect the touch driver 170 to the main control board 140 to implement data exchange.

5, FIG. 5 is a plan view of the flexible circuit board 160 as viewed from a side close to the protective layer 162. The first wire 1631, the second wire 1632, and the third wire 1633 of the conductive line 163 are electrically connected to the touch driver 170 through the second through holes 164a. Of course, it can be understood that the manner in which the conductive line 163 is connected to the touch driver 170 is not limited to the manner in which the second through hole 164a is formed in the substrate 164, and is merely a preferred embodiment for explaining the same. The connection relationship, and the modified embodiment of the connection manner of the other types of conductive lines 163 and the touch driver 170 does not exceed the scope of the present invention.

FIG. 6 is a schematic cross-sectional view showing the assembled electronic device 100. In this embodiment, the touch panel 120 is attached to the inner surface of the cover glass 110, and the flexible circuit board 160 is bent so that the portion of the third wire 1633 is connected to the main control board 140, and the second is disposed. A portion of the wire 1632 is electrically connected to the touch panel 120. At the same time, the reinforcing plate 161 is brought into contact with the inner surface of the cover glass 110. The reinforcing plate 161 is correspondingly disposed on the frame area 100a of the cover glass 110. Preferably The reinforcing plate 161 is disposed at a position corresponding to the function key 101. In this embodiment, the conductive reinforcing plate 161, the protective glass 110 abutting the reinforcing plate 161 and receiving the touch operation, and the electrical connection with the reinforcing plate 161 and providing a touch signal to the reinforcing plate The touch drivers of the 161 together form a single touch capacitive sensing system. When a conductive object (such as a finger) touches the outer surface of the function glass 101 or the protective glass 110 where the reinforcing plate 161 is located, the capacitance of the reinforcing plate 161 to the ground may be changed (relatively increased), and the capacitance is changed. The changed electrical signal is transmitted to the touch driver 170 via the first wire 1631, thereby realizing the detection of the single touch operation. When the touch controller 170 detects the corresponding touch signal, the control signal can be sent to the main control board 140. The main control board 140 can preset the operation of the electronic device 100 to perform the corresponding function by using the control signal, such as : Confirm, cancel, return to the main page and other functions. The manner in which the electronic device 100 implements the functions is known in the prior art, and therefore is not described herein.

FIG. 7 is a schematic cross-sectional structural view showing another embodiment of the electronic device 100 of the present invention. In the embodiment, the flexible circuit board 160 is bent toward the side of the back cover 150 such that the reinforcing plate 161 abuts against the insulated back cover 150. Specifically, the reinforcing plate 161 is sandwiched between the back cover 150 and the main control board 140. When a conductive object (for example, a finger) touches a position corresponding to the reinforcing plate 161 on the back cover 150, the capacitance of the reinforcing plate 161 to the ground also changes (relatively increases), and the capacitance changes the electrical signal. The touch operation is detected by the first wire 1631 being transmitted to the touch driver 170.

In the embodiment, the back cover 150 with the touch detection function can be combined with the program module built in the electronic device 100 to implement functions such as volume zoom, screen adjustment, and call transfer. The electronic device 100 itself may not have a touch function.

In the present invention, the back cover 150 and the cover glass 110 can serve as an insulating substrate for receiving an external touch operation, for abutting against the reinforcing plate 161, and forming a single with the reinforcing plate 161 and the driver 170. Point touch capacitive sensing system.

FIG. 8 is a cross-sectional view showing the flexible circuit board 160 according to the second embodiment of the present invention taken along the line V-V of FIG. The flexible circuit board 160 includes a reinforcing plate 161, an electromagnetic wave mask layer 165, a protective layer 162, a conductive line 163, and a substrate 164 which are sequentially stacked. The electromagnetic wave mask layer 165 covers the protective layer 162 for masking interference signals such as noise and electromagnetic waves. The electromagnetic wave mask layer 165 is, for example, a metal conductive film. The protective layer 162 covers and protects the conductive traces 163. The conductive line 163 is used to transmit an electrical signal. A first through hole 162a is defined in the protective layer 162. A plurality of second through holes 164a are defined in the substrate 164. The reinforcing plate 161 is used to enhance the robustness of the flexible circuit board 160. The reinforcing plate 161 is made of a conductive metal, such as a steel plate.

The driver 170 is configured to sense a change of the electrical signal on the reinforcing plate 161, receive the touch sensing signal on the touch panel 120 to the main control board 140, and generate a touch signal to the touch panel 120. The driver 170 is electrically connected to the reinforcing plate 161. The driver 170 can be disposed on the protective glass 110, the display module 130 or the main control board 140, or integrated in the flexible circuit board 120. In the present embodiment, the driver 170 is integrated in the flexible circuit board 120. Specifically, the driver 170 is disposed on a side of the substrate of the flexible circuit board 160 away from the reinforcing plate 161.

In the second embodiment, the first through hole 162a penetrates the electromagnetic wave mask layer 165 and the protective layer 162. It can be understood that, similar to the first embodiment, the conductive line 163 includes a first wire 1631, a second wire 1632, and a third wire 1633. The first wire 1631 is electrically connected to the reinforcing plate 161 by the first through hole 162a. Sexual connection The second wire 1632 extends to the touch panel 120 and is electrically connected to the touch panel 120. The third wire 1633 electrically connects the touch driver 170 and the main control board 140 to implement data exchange. The first wire 1631, the second wire 1632, and the third wire 1633 are electrically connected to the touch driver 170 through the second through holes 164a.

Compared with the flexible circuit board 160 in the first embodiment, the flexible circuit board 160 in the second embodiment is covered with an electromagnetic wave mask layer 165 on the protective layer 162, so that electromagnetic waves and the like can be effectively shielded. Signal, the flexibility of the flexible circuit board 160 is higher.

It is to be understood that the flexible circuit board 160 having only the single-layer conductive line 163 is only a preferred embodiment for explaining that the reinforcing board 161 and the touch panel 120 of the present invention are electrically connected to the touch driver 170 at the same time. The touch operation is measured, and it does not mean that the flexible circuit board 160 can only use a single-layer conductive circuit type flexible circuit board 160. In other embodiments, the flexible circuit board 160 can also adopt a well-known double-layer conductive line or a multi-layer conductive line structure as long as the reinforcing board 161 is electrically connected to the touch driver 170 and the touch operation is detected.

It can be understood that, as shown in FIG. 9, in another embodiment, when the driver 170 is disposed on the main control board 140, the third wire 1633 connecting the driver 170 and the main control board 140 can be directly disposed on the main On the control board 140. The third wire 1633 is preferably sandwiched between the driver 170 and the main control board 140 to save space on the main control board 140. The driver 170 and the touch panel 120 are electrically connected by the second wire 1632 disposed on the flexible circuit board. The reinforcing plate 161 is electrically connected to the driver by the first wire 1631 passing through the first through hole 162a. Sexual connection.

In summary, the creation meets the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present creation, and the scope of the creation is not above The equivalents of the embodiments of the present invention are intended to be within the scope of the following claims.

110‧‧‧protective glass

120‧‧‧Touch panel

130‧‧‧Display module

140‧‧‧Main control board

150‧‧‧Back cover

160‧‧‧Soft circuit board

161‧‧‧ reinforcing plate

162‧‧‧Protective layer

163‧‧‧Electrical circuit

164‧‧‧Substrate

1632‧‧‧second wire

1633‧‧‧ Third wire

101‧‧‧ function keys

Claims (14)

An electronic device with a touch function includes an insulating substrate, a flexible circuit board and a driver for receiving an external touch action, the flexible circuit board comprising a reinforcing plate for reinforcing the flexible circuit The board is used for sensing the change of the electric signal on the reinforcing plate. The reinforcing plate is made of a conductive metal, and the reinforcing plate is electrically connected to the driver. The reinforcing plate is laminated with the insulating substrate, and the reinforcing plate is disposed. The board, the insulating substrate and the driver together form a single-touch capacitive sensing system. When a conductive object touches a position on the insulating substrate corresponding to the reinforcing plate, the capacitance of the reinforcing plate changes, and the capacitance changes. The electrical signal is passed to the drive to generate a touch signal. The electronic device with a touch function as described in claim 1, wherein the flexible circuit board and the insulating substrate abut each other. The touch-enabled electronic device of claim 1, wherein the flexible circuit board further comprises a conductive line, the conductive line includes a first wire, and the two ends of the first wire are respectively associated with the reinforcing plate and the The drive is electrically connected. The electronic device with a touch function as described in claim 3, wherein the flexible circuit board further includes a protective layer disposed between the reinforcing plate and the conductive line, and the protective layer is provided with a through hole, one end of the first wire is electrically connected to the reinforcing plate through the first through hole. The electronic device with touch function of claim 3, wherein the flexible circuit board further comprises an electromagnetic wave mask layer, the electromagnetic wave mask layer being disposed between the reinforcing plate and the protective layer And covering the protective layer, the first through hole penetrating the electromagnetic wave mask layer and the protective layer. The electronic device with a touch function as described in claim 4, wherein the electronic device is further included The touch panel and the main control board are electrically connected to the touch panel and the main control board, and the driver is further configured to receive the touch sensing signal on the touch panel to the main control board, and generate a touch signal. For the touch panel, the main control board is used to control the electrical signals in the electronic device. The electronic device with a touch function as described in claim 6, wherein the flexible circuit board further comprises a substrate disposed on a side of the conductive line away from the protective layer, the substrate being opened a second through hole, the opposite end of the first wire is electrically connected to the driver through the second through hole. The electronic device with touch function according to claim 7, wherein the driver is disposed on a side of the flexible circuit board on which the substrate is away from the reinforcing plate. The electronic device with a touch function as described in claim 8, wherein the conductive circuit further includes a second wire and a third wire, and one end of the second wire extends toward the touch panel and the touch panel The other end of the third wire is electrically connected to the main control board, and the other end of the third wire is electrically connected to the driver. The electronic device with a touch function as described in claim 9, wherein the second wire and the third wire are electrically connected to the driver through the second through holes. The electronic device with a touch function according to claim 7, wherein the electronic device further comprises a cover glass, a frame area, and a display area surrounded by the frame area, the cover glass being an insulating substrate of the electronic device, The touch panel and the reinforcing plate are arranged side by side on the protective glass, and the touch panel is disposed corresponding to the display area, and the reinforcing plate is disposed corresponding to the frame area. The electronic device with touch function according to Item 11, wherein the frame area includes a function key, and the position of the reinforcing plate corresponds to the position of the function key. The electronic device with a touch function as described in claim 7 , wherein the electronic device further includes a back cover disposed on a side of the main control board away from the touch panel, the back cover serving as the An insulating substrate of the electronic device, the reinforcing plate is disposed between the main control board and the back cover and opposite to the back The covers abut each other. The electronic device with a touch function as described in claim 6, wherein the driver is disposed on the main control board, the electronic device further includes a second wire and a third wire, wherein the second wire is disposed in the soft On the circuit board, the driver and the touch panel are electrically connected by the second wire. The third wire is disposed on the main control board, and the driver and the main control board are electrically connected by the third wire.