CN107196634B - Touch panel assembly and portable electronic device - Google Patents

Abstract

The present invention discloses a touch panel assembly and a portable electronic device. The touch panel assembly includes a touch panel, a flexible circuit board, an input element and a light-emitting element. The touch panel includes a plurality of sensing series and a plurality of pads. The pads are arranged in a plurality of joint areas of the touch panel and are respectively electrically connected to the corresponding sensing series. The flexible circuit board includes a plurality of overlapping parts and a light-guiding part. The overlapping parts extend and connect the joint areas respectively. Each overlapping part includes a plurality of terminals electrically connected to the corresponding pads. The light-guiding part includes a connecting end and an extending end. The connecting end is connected to the corresponding overlapping part, and the extending end is connected to the connecting end and extends in a direction away from the touch panel. The input element is arranged directly above the extending end. The light-emitting element is arranged on the light incident side of the light-guiding part.

Description

Touch panel assembly and portable electronic device

technical field

The present invention relates to a touch panel assembly and a portable electronic device, and more particularly, to a capacitive touch panel assembly and a portable electronic device using the capacitive touch panel assembly.

Background technique

In recent years, with the rapid development and application of information technology, wireless mobile communication and information appliances, in order to achieve the purpose of being more convenient, lighter in size and more user-friendly, many information products have been input devices such as traditional keyboards or mice. Shift to use a touch panel as an input device.

Currently, the industry usually sets shortcut keys or hot keys in the peripheral area of the touch panel. Accordingly, when the user presses the hot key, the corresponding frequently-used function can be quickly activated, thereby shortening the time required for searching and activation of the function, and improving the convenience of use. In addition, in order to make the keys have the characteristic of emitting light, a backlight module is usually arranged under the keys, and the backlight module has a light guide plate, and a light source is arranged on one side of the light guide plate, so as to conduct the light emitted by the light source to the whole light guide plate and make the keys glow. However, in this configuration, one more layer of backlight modules must be provided, which increases the thickness, and the cost of the light guide plate is relatively expensive, which also makes it difficult to reduce the production cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a touch panel assembly and a portable electronic device using the touch panel assembly, which have a thinner overall thickness and lower production cost.

To achieve the above objective, the touch panel assembly of the present invention includes a touch panel, a flexible circuit board, at least one input element and at least one light emitting element. The touch panel includes a plurality of sensing series and a plurality of pads. The pads are arranged on a plurality of bonding areas of the touch panel and are respectively electrically connected to the corresponding sensing series, wherein the bonding areas are located on the side of the touch panel. The flexible circuit board includes a plurality of overlapping parts and at least one light guide part. The overlapping portions respectively extend and connect the joint areas. Each overlapping portion includes a plurality of terminals, which are respectively electrically connected to the corresponding pads. The light guide portion includes a connection end and an extension end. The connection end is connected to the corresponding overlapping portion, and the extension end is connected to the connection end and extends away from the touch panel. The input element is arranged just above the extension end. The light emitting element is disposed on the light incident side of the light guide portion and is configured to emit light. The input element is illuminated so that the light enters the light guide portion.

The portable electronic device of the present invention includes a casing, a display module, a touch panel, a flexible circuit board structure, at least one input element and at least one light-emitting element. The housing has an opening. The host module is arranged in the casing. The display module is arranged in the casing, and the opening exposes the display surface of the display module. The touch panel is arranged on the display surface. The touch panel includes a plurality of sensing series, a plurality of pads and . The pads are arranged on a plurality of bonding areas of the touch panel and are respectively electrically connected to the corresponding sensing series, wherein the bonding areas are located on the side of the touch panel. The flexible circuit board includes a plurality of overlapping parts and at least one light guide part. The overlapping portions respectively extend and connect the joint areas. Each overlapping portion includes a plurality of terminals, which are respectively electrically connected to the corresponding pads. The light guide portion includes a connection end and an extension end. The connection end is connected to the corresponding overlapping portion, and the extension end is connected to the connection end and extends away from the touch panel. The input element is arranged just above the extension end. The light emitting element is disposed on the light incident side of the light guide portion and is configured to emit light, so that the light enters the light guide portion to illuminate the input element.

In an embodiment of the present invention, the above-mentioned touch panel further includes a plurality of connecting lines, respectively electrically connecting the corresponding sensing series to the corresponding pads.

In an embodiment of the present invention, the number of the at least one input element is multiple, and the input elements and the bonding area are substantially staggered along a direction parallel to the side edge.

In an embodiment of the present invention, the number of the at least one light guide portion is multiple, and the light guide portions respectively overlap with multiple orthographic projections of the input element.

In an embodiment of the present invention, the number of the at least one light-emitting element is multiple, and the extension ends are respectively located on the light paths of the plurality of light rays emitted by the light-emitting element.

In an embodiment of the present invention, the above-mentioned flexible circuit board further includes at least one slot, and the slot surrounds the extending end to define the light guide portion.

In an embodiment of the present invention, the above-mentioned bonding area is located on the lower surface of the touch panel, and the flexible circuit board is provided with the lower surface and connected to the bonding area.

In an embodiment of the present invention, the above-mentioned touch panel assembly further includes a transparent cover plate covering the touch panel and the flexible circuit board. The light-emitting element is arranged on the lower surface of the transparent cover plate.

In an embodiment of the present invention, the above-mentioned touch panel assembly further includes a substrate, and the light-emitting element is disposed on the substrate and located between the touch panel and the substrate.

In an embodiment of the present invention, the above-mentioned flexible circuit board further includes a light guide film covering at least the upper surface of the light guide portion.

In an embodiment of the present invention, the surface of the above-mentioned light guide film facing the input element has a plurality of microstructures.

In an embodiment of the present invention, the above-mentioned flexible circuit board further includes a base material layer and a light guide film. The base material layer covers the light guide film and has at least one opening corresponding to the extension end to expose the light guide film at the extension end.

In an embodiment of the present invention, the surface of the above-mentioned light guide film facing the input element has a plurality of microstructures.

In an embodiment of the present invention, the above-mentioned input element is disposed on the side and between any two adjacent joint areas.

In an embodiment of the present invention, the above-mentioned touch panel further includes at least one protruding portion protruding from the side edge and located just above the extending end, and the input element is disposed on the protruding portion.

In an embodiment of the present invention, the above-mentioned touch panel assembly further includes an adhesive layer disposed between the protruding portion and the extending end for bonding the protruding portion and the extending end.

The above touch panel assembly, wherein the input element is disposed on the extension end.

In an embodiment of the present invention, the above-mentioned touch panel assembly further includes a transparent cover plate and an adhesive layer, the transparent cover plate covers the touch panel and the flexible circuit board, and the adhesive layer is disposed between the transparent cover plate and the extension end .

Based on the above, in the touch panel assembly of the present invention and the portable electronic device using the touch panel assembly, the flexible circuit board includes a plurality of overlapping parts and at least one light guide part, and the overlapping parts are used for A plurality of pads of the touch panel are connected, and the light guide portion is located between any two adjacent overlapping portions. In addition, the light guide portion has an extension end, which extends in a direction away from the touch panel, the input element is arranged just above the light guide portion, and the light-emitting element is arranged on the light incident side of the light guide portion, so that the light enters the extension end , to illuminate the input element on it. With this configuration, the touch panel assembly of the present invention and the portable electronic device using the touch panel assembly can make the input element have a uniform backlight effect without disposing the light guide plate, thereby effectively reducing the overall thickness , which can reduce production costs.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

Description of drawings

FIG. 1 is a schematic perspective view of a portable electronic device according to an embodiment of the present invention;

2 is a schematic diagram of a touch panel according to an embodiment of the present invention;

3 is a partial bottom view schematic diagram of a touch panel assembly according to an embodiment of the present invention;

Fig. 4 is the bottom view schematic diagram of the flexible circuit board of Fig. 3;

5 is a partial cross-sectional schematic diagram of the touch panel assembly of FIG. 3 along line I-I;

6 is a partial cross-sectional schematic diagram of a touch panel assembly according to another embodiment of the present invention;

7 is a schematic top view of a touch panel assembly according to an embodiment of the present invention;

FIG. 8 is an exploded schematic diagram of a part of the components of the touch panel assembly of FIG. 7;

Fig. 9 is a partial cross-sectional schematic diagram of the touch panel assembly of Fig. 7 along line A-A';

Fig. 10 is a partial cross-sectional schematic diagram of the touch panel assembly of Fig. 7 along line B-B';

11 is a schematic top view of a touch panel assembly according to an embodiment of the present invention;

FIG. 12 is an exploded schematic view of some components of the touch panel assembly of FIG. 11;

FIG. 13 is a partial enlarged schematic view of the touch panel assembly of FIG. 11;

Fig. 14 is a partial cross-sectional schematic view of the touch panel assembly of Fig. 11 along line A-A';

FIG. 15 is a schematic partial cross-sectional view of the touch panel assembly of FIG. 11 along line B-B'.

Symbol Description

10: Portable Electronic Devices

12: Shell

12a: Opening

14: Display module

14a: Display surface

16: Transparent cover

16a, 16b: light transmission pattern

50: Touch panel assembly

100: Flexible circuit board

110: Lap joint

112: Terminal

112a: first terminal

112b: second terminal

112c: Third terminal

120: Light guide part

122: Connection end

124: Extension

130: Light guide film

140: Hub Department

142: Line

150: Slotted

160: Substrate layer

200: Touch Panel

210: Sensing string

210a: Upper block

210b: next block

220: Pad

222: The first pad group

222a: first pad

224: Second pad group

224a: second pad

226: The third pad group

226a: Third pad

230: connecting line

232: First connection line

234: Second connection line

236: Third connecting line

240: Projection

300: Light-emitting element

400: Substrate

500: Input element

510: first input element

520: Second input element

530: Key Pattern

540: Button circuit layer

600: Transparent cover

700: Adhesive layer

L1, L2, L3: side

OP: open mouth

P1: Light Path

R1, R2, R3: junction area

S1: Sensing area

Detailed ways

FIG. 1 is a schematic perspective view of a portable electronic device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a touch panel according to an embodiment of the present invention. 3 is a partial bottom view schematic diagram of a touch panel assembly according to an embodiment of the present invention. Please refer to FIG. 1 to FIG. 3 at the same time. The portable electronic device 10 of this embodiment may be a smart phone as shown in FIG. 1 . Of course, this embodiment is only for illustration, and in other embodiments Among them, the portable electronic device 10 of the present invention can also be a portable electronic device with touch function, such as a tablet PC (tablet PC) or an electronic book (eBook). 1 to 3 , the portable electronic device 10 of this embodiment includes a casing 12 , a display module 14 , a transparent cover 16 , a flexible circuit board 100 and a touch panel 200 . The housing 12 has an opening 12a as shown in FIG. 1 . The display module 14 is disposed in the casing 12 , and the opening 12 a exposes the display surface 14 a of the display module 14 . The touch panel 100 shown in FIG. 2 can be disposed on the display surface 14 a , and the flexible circuit board 100 is suitable for being bent to electrically connect the touch panel 200 and the host module of the portable electronic device 10 . The transparent cover 16 is disposed on the touch panel 200 and covers the opening 12 a of the casing 12 . The transparent cover 16 has at least one light-transmitting pattern 16 a , and the light-transmitting pattern can be used as a key pattern of the portable electronic device 10 .

The touch panel assembly 50 in this embodiment includes a flexible circuit board 100 , a touch panel 200 , an input element 500 and at least one light-emitting element 300 . The touch panel 200 includes a plurality of sensing series 210 , a plurality of pads 220 and a plurality of connection lines 230 . The sensing series 210 are disposed in the sensing area S1 of the touch panel 200 , and the pads 220 are disposed outside the sensing area S1 , and are respectively electrically connected to the corresponding sensing series 210 through the connecting wires 230 . In this configuration, when the user touches the touch panel 200 with a finger, the touch panel 200 will generate a capacitance change between the sensing strings at the position touched by the finger, and the capacitance change will be converted into a control signal It is transmitted to an external circuit, and is processed to output appropriate commands to operate the portable electronic device 10 .

In detail, referring to FIG. 2 , the pads 220 may include a first pad group 222 , a plurality of second pad groups 224 and a plurality of third pad groups 226 , wherein the first pad group includes a plurality of first pad groups 226 . A pad 222a, the second pad group 224 includes a plurality of second pads 224a, and the third pad group 226 includes a plurality of third pads 226a, the above-mentioned first pad group 222, a plurality of second pads The pad group 224 and the plurality of third pad groups 226 are respectively disposed in the plurality of bonding regions R1 , R2 and R3 of the touch panel 200 . The bonding regions R1, R2, and R3 are located on the side L1 of the sensing region S1.

As mentioned above, the connection lines 230 may include a plurality of first connection lines 232 , a plurality of second connection lines 234 and a plurality of third connection lines 236 , wherein the first connection lines 232 are disposed on the side L2 of the touch panel 200 , In order to electrically connect the sensing series 210 located in the lower block 210b of the touch panel 200 to the corresponding first pads 222a, the second connection lines 234 are arranged on the side L3 of the touch panel 200 to The sensing series 210 in the upper block 210a of the touch panel 200 are electrically connected to the corresponding second pads 224a. In this way, in this embodiment, the sensing series 210 is divided into two blocks 210a, 210b, and the connecting lines 232, 234 located on the two sides L2, L3 are respectively connected to the corresponding pads 222a, 224a, which can save the connection The wiring space of the lines 232 and 234 on the touch panel 200 . Therefore, the size of the touch panel 200 is reduced, the peripheral frame of the portable electronic device 10 is reduced, and the display area of the portable electronic device 10 is enlarged. Similarly, the third connection lines 236 are disposed on the side L1 of the touch panel 200 to electrically connect the sensing series 210 located on the side L1 to the corresponding third pads 226a, respectively.

In this embodiment, the input element 500 can be disposed on the side L1 of the sensing area S1, and is located between any two adjacent bonding areas R1, R2, R3, and the input element 500 and the bonding areas R1, R2 , R3 are staggered with each other along the direction parallel to the side L1. The input element 500 can be, for example, a physical key, a light sensitive key, a stress sensitive key, etc. disposed on the portable electronic device 10 , and the present invention does not limit the input element 500 types and methods of generating control signals. In this embodiment, the input element 500 may be a physical button. The input element 500 is different from the virtual keys displayed by the display. Specifically, the input element 500 may include a first input element 510 and a second input element 520 . The first input element 510 and the second input element 520 are respectively located directly below the first light-transmitting pattern 16a and the second light-transmitting pattern 16b as shown in FIG. 1 , and the first input element 510 and the second input element 520 can be respectively There are different functions, such as the function of returning to the previous page or returning to the main screen. It should be noted here that the number of input elements 500 in this embodiment is multiple, but this embodiment is only used for illustration, and the present invention does not limit the number of input elements 500 .

FIG. 4 is a schematic bottom view of the flexible circuit board of FIG. 3 . FIG. 5 is a partial cross-sectional schematic diagram of the touch panel assembly of FIG. 3 along the line I-I. Referring to FIGS. 3 to 5 at the same time, in this embodiment, the flexible circuit board 100 includes a plurality of overlapping portions 110 and at least one light guide portion 120 as shown in FIGS. 3 and 4 . The overlapping portions 110 extend and connect to the bonding regions R1 , R2 , R3 as shown in FIG. 2 , respectively. As shown in FIG. 4 , each overlapping portion 110 includes a plurality of terminals 112 , which are respectively electrically connected to the corresponding pads 220 . In detail, each overlapping portion 110 includes a plurality of first terminals 112 a , a plurality of second terminals 112 b and a plurality of third terminals 112 c respectively, and the first terminals 112 a are respectively electrically connected to the plurality of first terminals 112 a of the first pad group 222 . A pad 222a, the second terminals 112b are respectively electrically connected to the plurality of second pads 224a of the second pad group 224, and the third terminals 112c are respectively electrically connected to the plurality of third terminals of the third pad group 226 pad 226a. In this embodiment, the flexible circuit board 100 is disposed on the lower surface of the touch panel 200 , and the bonding regions R1 , R2 , and R3 of the touch panel 200 are correspondingly disposed on the lower surface of the touch panel 200 , so that the bonding regions The pads 220 in R1 , R2 , and R3 are respectively electrically connected to the terminals 112 of the overlapping portion 110 . In this configuration, the touch panel 200 of FIG. 2 presents elements disposed on its lower surface in a see-through manner.

In addition, the flexible printed circuit board 100 may further include a hub portion 140 and a plurality of lines 142. The hub portions 140 are respectively connected to the overlapping portion 110 and can extend to the outside of the touch panel 200. The foregoing plurality of lines 142 are respectively The first terminal 112 a , the second terminal 112 b , and the third terminal 112 c are connected to the hub 140 to be electrically connected to a host module such as the portable electronic device 10 through the hub 140 .

In this embodiment, the light guide portion 120 includes a connection end 122 and an extension end 124 which are connected to each other as shown in FIG. 3 . The connecting end 122 is connected to the corresponding overlapping portion 110 , and the extending end 124 faces the light emitting element 300 and extends away from the touch panel 200 as shown in FIG. 5 . In this embodiment, the number of the light guide portions 120 corresponds to the number of the input elements 500 , which may be multiple (two are shown, but not limited thereto). Projections overlap. Specifically, the above-mentioned plurality of light guide portions 120 are respectively located directly below the above-mentioned plurality of input elements 500 . In this embodiment, the flexible circuit board 100 further includes at least one slot 150 (two are shown, but not limited to this), and the slot 150 respectively surrounds the extension end 124 to provide a flexible solution as shown in FIG. 3 . Corresponding light guide portions 120 are defined on the circuit board 100 .

In this embodiment, the flexible circuit board 100 may further include a light guide film 130 covering at least the upper surface of the light guide portion 120 . For example, the light guide film 130 can replace the uppermost dielectric layer in the flexible circuit board 100 and comprehensively cover the upper surface of the flexible circuit board 100 . Of course, this embodiment is only used for illustration, and the present invention is not limited thereto. In other embodiments, the light guide film 130 may only cover the upper surface of the light guide portion 120 . The light emitting element 300 is disposed on the light incident side of the light guide portion 120 . Specifically, the light-emitting element 300 may be disposed on the substrate 400 as shown in FIG. 5 , and the light-emitting element 300 is located between the touch panel 200 and the substrate 400 . Light emitting element 300 is configured to emit light (shown in phantom in FIG. 5). The extension end 124 is located on the light path P1 of the light, so that the light enters the light guide film 130 on the extension end 124 to illuminate the input element 500 above it. In this embodiment, the number of the light-emitting elements 300 may be multiple corresponding to the number of the light-guiding parts 120 , and the extending ends 124 of the light-guiding parts 120 are respectively located on the light paths P1 of the light emitted by the light-emitting elements 300 .

The light guide film 130 in this embodiment may be a transparent film with high refractive index and light transmittance, and the surface of the light guide film 130 may have a plurality of dot-like microstructures. Therefore, the light guide film 130 can take advantage of the difference in the refractive index of light between the media to cause total reflection in the light guide film 130, and guide the light to exit from the surface facing the input element 500 through the mesh-like microstructure, so as to The input element 500 is illuminated. With this configuration, the input element 500 can have the effect of uniform backlight without additionally disposing the light guide plate.

6 is a partial cross-sectional schematic diagram of a touch panel assembly according to another embodiment of the present invention. It must be noted here that the touch panel assembly of this embodiment is similar to the touch panel assembly of FIG. 5 . Therefore, this embodiment uses the component numbers and parts of the previous embodiment, and the same numbers are used to denote the same. The same or similar elements, and the description of the same technical content is omitted. For the description of the omitted part, reference may be made to the foregoing embodiments, which will not be repeated in this embodiment. Referring to FIG. 6 , the difference between the touch panel assembly of this embodiment and the touch panel assembly of FIG. 5 will be described below.

In this embodiment, the touch panel assembly further includes a transparent cover plate 600 covering the flexible circuit board 100 and the touch panel 200 , and the light emitting element 300 is disposed on the lower surface of the transparent cover plate 600 . The extending end 124 faces the light emitting element 300 and is located on the light path P1 of the light emitted by the light emitting element 300 . In this way, the light emitted by the light emitting element 300 can enter the light guide film 130 on the extension end 124 to illuminate the input element 500 .

7 is a schematic top view of a touch panel assembly according to an embodiment of the present invention. It must be noted here that the touch panel assembly of this embodiment is similar to the touch panel assembly of FIG. 6 . Therefore, this embodiment uses the component numbers and parts of the previous embodiment, and the same numbers are used to denote the same. The same or similar elements, and the description of the same technical content is omitted. For the description of the omitted part, reference may be made to the foregoing embodiments, which will not be repeated in this embodiment. The difference between the touch panel assembly of this embodiment and the touch panel assembly of FIG. 6 will be described below.

FIG. 8 is a partially exploded schematic view of the touch panel assembly of FIG. 7 . It should be noted that, for the sake of simplicity, the circuit layouts on the touch panel 200 in FIGS. 7 and 8 are only schematic diagrams, and the transparent cover 600 is omitted in FIG. 8 . 7 and FIG. 8 , in this embodiment, the touch panel 200 further includes at least one protruding portion 240 protruding from the side of the touch panel 200 and located at the extending end 124 of the flexible circuit board 100 Right above, the input element 500 is disposed on the protruding portion 240 . In other words, the orthographic projection of the protruding portion 240 overlaps with the extending end 124 of the flexible circuit board 100 , and the input element 500 is disposed on the protruding portion 240 . In this embodiment, the protruding portion 240 may protrude from an edge of the touch panel 200 as shown in FIG. 8 , and not be arranged in a collinear manner with the bonding regions R1 , R2 , and R3 .

FIG. 9 is a schematic partial cross-sectional view of the touch panel assembly of FIG. 7 along line A-A'. FIG. 10 is a schematic partial cross-sectional view of the touch panel assembly of FIG. 7 along the line B-B'. 9 and FIG. 10, in this embodiment, the touch panel assembly 50 further includes a transparent cover plate 600, which covers the touch panel 200 and the flexible circuit board 100, and the light-emitting element 300 is disposed on the transparent cover plate 600's lower surface. Further, as shown in FIG. 10 , the flexible circuit board 100 may further include a base material layer 160 and a light guide film 130 , wherein the base material layer 160 covers the light guide film 130 , and the base material layer 160 has corresponding extension ends 124 The at least one opening OP is formed to expose the light guide film 130 located at the extension end 124 . In this way, the protruding portion 240 provided with the input element 500 can be extended to above the extension end 124 through the opening OP, and the surface of the light guide film 130 can further have a plurality of microstructures 132, so that the light entering the light guide film 130 can be The microstructures 132 are diffused or reflected, so that light is emitted from the surface facing the input element 500 to illuminate the input element 500 .

In this configuration, the light emitting element 300 can be disposed on the flexible circuit board 100 facing the extension end 124 and disposed on the transparent cover plate 600 via the flexible circuit board 100 . In this way, the light emitting element 300 can be disposed on the light incident side of the light guide portion 120 as shown in FIG. Light exits from the surface facing the input element 500 to illuminate the input element 500 directly above. In addition, in this embodiment, the touch panel assembly 50 may further include an adhesive layer 700 , which may be disposed between the protruding portion 240 and the extending end 124 as shown in FIG. 10 to bond the protruding portion 240 to the extension end 124 Extension end 124 .

11 is a schematic top view of a touch panel assembly according to an embodiment of the present invention. It must be noted here that the touch panel assembly of this embodiment is similar to the touch panel assembly of FIG. 5 . Therefore, this embodiment uses the component numbers and parts of the previous embodiment, and the same numbers are used to denote the same. The same or similar elements, and the description of the same technical content is omitted. For the description of the omitted part, reference may be made to the foregoing embodiments, which will not be repeated in this embodiment. The difference between the touch panel assembly of this embodiment and the touch panel assembly of FIG. 5 will be described below.

FIG. 12 is a partially exploded schematic view of the touch panel assembly of FIG. 11 . FIG. 13 is a partial enlarged schematic view of the touch panel assembly of FIG. 11 . It should be noted that, for the sake of simplicity, the circuit layouts on the touch panel 200 in FIGS. 11 and 12 are only schematic diagrams, and the transparent cover 600 is omitted in FIG. 12 . Please refer to FIG. 11 to FIG. 13 at the same time. In this embodiment, the input element 500 is disposed on the extension end 124 of the flexible circuit board 100 . In detail, the flexible circuit board 100 may include a base material layer 160 and a light guide film 130 similar to the previous embodiment, wherein the base material layer 160 covers the light guide film 130 , and the base material layer 160 has a corresponding extension end 124 . At least one opening OP is provided to expose the light guide film 130 located at the extension end 124 . In this embodiment, the input element 500 may include a key pattern 530 and a key circuit layer 540 , the key pattern 520 may be disposed on the glossy surface of the light guide film 130 , and the key circuit layer 540 may surround the key pattern 520 and be located on the substrate layer 160 and between the light guide film 130 . Of course, this embodiment is only for illustration, and the present invention does not limit the structure and circuit configuration of the input element 500 . In addition, the light guide film 130 can have a plurality of microstructures 132, so that the light entering the light guide film 130 can be diffused or reflected by the microstructures 132, so that the light can be emitted from the surface facing the input element 500, so that the light entering the input element 500 can be diffused or reflected. 500 for lighting.

FIG. 14 is a schematic partial cross-sectional view of the touch panel assembly of FIG. 11 along line A-A'. FIG. 15 is a schematic partial cross-sectional view of the touch panel assembly of FIG. 11 along line B-B'. 14 and FIG. 15, in this embodiment, the touch panel assembly may further include a transparent cover plate 600 and an adhesive layer 700, wherein the transparent cover plate 600 covers the touch panel 200 and the flexible circuit board 100, The adhesive layer 700 is disposed between the transparent cover plate 600 and the extension end 124 . In detail, since the base material layer 160 of the flexible circuit board 100 has an opening OP corresponding to the extension end 124 to expose the light guide film 130 below, the adhesive layer 700 can be filled in the opening OP to adhere to the transparent cover plate 600 and extension 124. In this configuration, the light-emitting element 300 can be disposed on the flexible circuit board 100 facing the extension end 124 and disposed on the transparent cover 600 via the flexible circuit board 100 . In this way, the light-emitting element 300 can be disposed on the light-incident side of the light guide film 130 as shown in FIG. Light exits from the surface facing the input element 500 to illuminate the input element 500 directly above.

To sum up, in the touch panel assembly and the portable electronic device of the present invention, the flexible circuit board includes a plurality of overlapping portions and at least one light guide portion, and the overlapping portions are used to connect the multiple connections of the touch panel. pad, and the light guide part is located between any two adjacent overlapping parts. In addition, the light guide portion has an extension end, which extends in a direction away from the touch panel and is located just below the input element, and the light-emitting element is arranged on the light incident side of the light guide portion, so that the light enters the extension end of the light guide portion, And light is emitted from the surface of the extension end facing the input element, so as to illuminate the input element. With this configuration, the touch panel assembly of the present invention and the portable electronic device using the touch panel assembly can make the input element have a uniform backlight effect without disposing the light guide plate, thereby effectively reducing the overall thickness , which can reduce production costs.

Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the appended claims.

Claims (19)

1. A touch panel assembly, characterized in that it comprises: touch panel, including: a plurality of sense strings; and a plurality of pads are disposed on a plurality of bonding areas of the touch panel and are respectively electrically connected to the corresponding sensing series, wherein the bonding areas are located on the side of the touch panel; Flexible circuit boards, including: a plurality of overlapping parts respectively extending and connecting the bonding areas, each of the overlapping parts including a plurality of terminals, respectively electrically connected to the corresponding pads; at least one light guide portion includes a connection end and an extension end, the connection end is connected to the corresponding overlapping portion, the extension end is connected to the connection end and extends in a direction away from the sensing series of the touch panel; and The light guide film directly covers the entire upper surface of the flexible circuit board; at least one input element disposed just above the extension end; and At least one light emitting element is disposed on the light incident side of the light guide portion and configured to emit light, so that the light enters the light guide portion to illuminate the input element. 2 . The touch panel assembly of claim 1 , wherein the touch panel further comprises a plurality of connecting lines, respectively electrically connecting the corresponding sensing series to the corresponding pads. 3 . 3 . The touch panel assembly of claim 1 , wherein the number of the at least one input element is plural, and the input elements and the bonding areas are substantially staggered along a direction parallel to the side edge. 4 . 4 . The touch panel assembly of claim 3 , wherein the number of the at least one light guide portion is plural, and the light guide portions respectively overlap with the orthographic projections of the input elements. 5 . 5 . The touch panel assembly of claim 4 , wherein the number of the at least one light-emitting element is plural, and the extending ends are respectively located on the light paths of the plurality of light rays emitted by the light-emitting elements. 6 . 6 . The touch panel assembly of claim 1 , wherein the flexible circuit board further comprises at least one slot, and the slot surrounds the extending end to define the light guide portion. 7 . 7 . The touch panel assembly of claim 1 , wherein the bonding areas are located on a lower surface of the touch panel, and the flexible circuit board is disposed on the lower surface and connected to the bonding areas. 8 . 8 . The touch panel assembly of claim 1 , further comprising a transparent cover plate covering the touch panel and the flexible circuit board, and the light-emitting element is disposed on a lower surface of the transparent cover plate. 9 . 9 . The touch panel assembly of claim 1 , further comprising a substrate, the light emitting element is disposed on the substrate and located between the touch panel and the substrate. 10 . 10 . The touch panel assembly of claim 1 , wherein the flexible circuit board further comprises a light guide film covering at least an upper surface of the light guide portion. 11 . 11. The touch panel assembly of claim 10, wherein the light guide film has a plurality of microstructures. 12 . The touch panel assembly of claim 1 , wherein the flexible circuit board further comprises a base material layer, the base material layer covers the light guide film and has at least one opening corresponding to the extended end to expose the base material at the extended end. 13 . the light guide film at the extension end. 13. The touch panel assembly of claim 12, wherein the light guide film has a plurality of microstructures. 14. The touch panel assembly of claim 1, wherein the input element is disposed on the side and between any two adjacent bonding areas. 15 . The touch panel assembly of claim 1 , wherein the touch panel further comprises at least one protruding portion protruding from the side edge and located just above the extending end, and the input element is disposed on the protruding portion 15 . On the exit. 16. The touch panel assembly of claim 15, further comprising an adhesive layer disposed between the protruding portion and the extending end for bonding the protruding portion and the extending end. 17. The touch panel assembly of claim 1, wherein the input element is disposed on the extending end. 18. The touch panel assembly of claim 17, further comprising a transparent cover plate and an adhesive layer, the transparent cover plate covering the touch panel and the flexible circuit board, the adhesive layer disposed between the transparent cover plate and the flexible circuit board between the extension ends. 19. A portable electronic device, characterized in that it comprises: a housing, having an opening; a display module, disposed in the casing, and the opening exposes the display surface of the display module; and The touch panel assembly of claim 1 , wherein the touch panel is disposed on the display surface.

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