CN202221730U - Thin film circuit boards, keyboards and electronic devices - Google Patents

Abstract

The present invention relates to a thin film circuit board, a keyboard and an electronic device, wherein the keyboard comprises a keycap, a luminescent layer, a reply piece and a thin film circuit board. The keycap comprises a light-transmitting pattern. The restoring piece is positioned between the keycap and the luminous layer. The thin film circuit board is arranged between the restoring piece and the luminous layer and is provided with a touch pressure area and at least one light emitting area. The touch and press area is opposite to the recovery piece. The light-emitting area is located in a vertical projection area of the light-transmitting pattern corresponding to the thin-film circuit board. The film circuit board comprises a plurality of light-transmitting films and a plurality of light-transmitting adhesive layers. The light-transmitting films are stacked on each other. The light-transmitting adhesive layer is positioned between any two adjacent light-transmitting films and fully filled in the light-emitting area.

Description

Thin film circuit boards, keyboards and electronic devices

technical field

The utility model relates to a keyboard, in particular to a keyboard with luminous features.

Background technique

In recent years, in order to overcome the problem that the user cannot identify and use the keyboard in a low-light or dark environment, whether it is a keyboard used in a desktop computer, a laptop computer, a notebook computer or an Internet TV, the market has published There are many kinds of luminous keyboards, and these luminous keyboards all refer to a built-in light-emitting module. By using the built-in light-emitting module to emit light outward through each key, the user can clearly identify the representative characters and characters of each key. Tap position.

Generally speaking, the light-emitting keyboard generally includes a light-emitting module layer, a thin-film circuit layer and a button layer from bottom to top. The film circuit layer is located between the light-emitting module and the button layer, and includes a plurality of overlapping films and a matrix circuit. The matrix circuit is located in any two films and has a plurality of touch switches. The button layer includes a plurality of keycaps and return pieces, the keycaps correspond to each return piece one by one, and the return pieces correspond to each touch switch one by one. In this way, when each keycap is pressed, the corresponding touch switch can be triggered by the corresponding return member. In addition, since the light-emitting module layer is placed under the thin film circuit layer, light can be provided to illuminate the keycap through the thin film circuit layer, so that the keycap emits light.

However, when light passes through the thin film circuit layer from the light-emitting module layer, it is still blocked by the multi-layer film and diffused, thereby affecting the efficiency of the light transmission to the keycap and reducing the output light source brightness of the light-emitting keyboard device.

This shows that above-mentioned existing keyboard obviously still has inconvenience and defect in structure and use, and urgently needs to be further improved. In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. urgent problem to be solved. Therefore, how to create a new type of thin film circuit board, keyboard and electronic device is one of the current important research and development topics, and has also become a goal that the industry needs to improve.

Contents of the invention

The main purpose of the utility model is to provide a keyboard, a thin film circuit board and an electronic device, which are used to avoid unnecessary consumption of light, thereby increasing the luminous efficiency and the output brightness of the light source.

Another object of the present invention is to provide a keyboard, a thin film circuit board and an electronic device for isolating each printed circuit pattern from contact with external moisture.

The purpose of this utility model and the solution to its technical problems are achieved by adopting the following technical solutions. A keyboard proposed according to the present invention comprises: a keycap, including at least one light-transmitting pattern; a light-emitting layer, which outputs light toward the direction of the keycap; and a return element, located between the keycap and the light-emitting layer between, and connect the keycap; and a thin film circuit board, which is arranged between the reply member and the luminescent layer, has a touch pressure area and at least one light emitting area, the touch pressure area is facing the reply member, the light emitting The area is located at least in a vertical projection area of the light-transmitting pattern corresponding to the thin film circuit board, and the thin-film circuit board includes: a plurality of light-transmitting films stacked on each other; and at least one light-transmitting adhesive layer located on any two adjacent between the light-transmitting films, and fully fill in the light-emitting region.

The purpose of the utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned keyboard, the light emitting area is only located in the vertical projection area, and the area of the light emitting area is equal to the area of the light-transmitting pattern.

In the aforementioned keyboard, the area of the light emitting area is larger than the area of the light-transmitting pattern, and the light-emitting area surrounds the touch-press area, wherein the touch-press area is hollow and completely surrounded by the light-transmitting adhesive layer.

The aforementioned keyboard, wherein the film circuit board further includes: an upper circuit pattern, coated on one surface of the light-transmitting film, including an upper electrode point, the upper electrode point is located in the contact pressure area, and facing the reply member; and a lower circuit pattern, coated on the other surface of the light-transmitting film, including a lower electrode point, which is located in the contact pressure area, facing the upper electrode point, and the upper electrode point The electrode point maintains a distance, and there is no obstacle between the upper electrode point and the upper electrode point.

The aforementioned keyboard, wherein the number of said light-transmitting films is more than three, one of said light-transmitting films is sandwiched between two said light-transmitting films, and electrically isolates the upper circuit pattern and the lower circuit pattern , wherein the light-transmitting film sandwiched has a first opening, and the first opening is located in the contact pressure area and between the lower electrode point and the upper electrode point.

The aforementioned keyboard, wherein the number of said light-transmitting films is two.

The aforementioned keyboard, wherein the light-transmitting adhesive layer between the light-transmitting films blocks the contact between the upper circuit pattern and the lower circuit pattern.

In the aforementioned keyboard, the light-transmitting adhesive layer between the light-transmitting films has a second opening, and the second opening is located in the contact pressure area.

In the aforementioned keyboard, the upper circuit pattern further includes an upper printed wire connected to the upper electrode point and covered by the at least one light-transmitting adhesive layer, and the lower circuit pattern further includes a lower printed wire, The lower printed wire is connected to the lower electrode point and is covered by the at least one light-transmitting glue layer.

The purpose of the utility model and its technical problem solving also adopt the following technical schemes to realize. An electronic device according to the present invention includes: a keyboard as described above.

The purpose of the utility model and the solution to its technical problems are realized by adopting the following technical solutions in addition. According to a thin film circuit board proposed by the utility model, it is divided into a plurality of button areas, and each button area is divided into a touch area and at least one light output area, including: a first light-transmitting film; a second light-transmitting film , stacked on one side of the first light-transmitting film; and at least one light-transmitting adhesive layer, attached between the first light-transmitting film and the second light-transmitting film, and fully filling the light-emitting area.

The purpose of the utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

The aforementioned film circuit board further includes: an upper circuit pattern coated on the surface of the first light-transmitting film facing the second light-transmitting film, including: at least one upper electrode point located in the contact pressure area;

At least one upper printed wire, connected to the upper electrode point; and a lower circuit pattern, coated on the surface of the second light-transmitting film facing the first light-transmitting film, including: at least one lower electrode point, located in the contact pressure area , maintaining a space between the upper electrode point and the upper electrode point, and there is no obstacle in the space; and at least one printed wire connected to the lower electrode point.

The aforementioned film circuit board further includes: a third light-transmitting film, sandwiched between the first light-transmitting film and the second light-transmitting film, having at least one first opening, the first opening It is located in the contact pressure area and between the lower electrode point and the upper electrode point.

The purpose of the utility model and its technical problem are solved by adopting the following technical solutions in addition. According to a thin film circuit board proposed by the utility model, it is divided into a plurality of contact pressure areas and a light output area, and the light output area surrounds the contact pressure area. The thin film circuit board includes: a first light-transmitting film; a first Two light-transmitting films, stacked on one side of the first light-transmitting film; and at least one light-transmitting adhesive layer, located between the first light-transmitting film and the second light-transmitting film, and fully filling the light exit area Among them, a plurality of hollow parts are included, and the hollow parts respectively correspond to the contact pressure areas one by one.

The purpose of the utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

The aforementioned film circuit board further includes: an upper circuit pattern coated on the surface of the first light-transmitting film facing the second light-transmitting film, including: at least one upper electrode point located in the contact pressure area; At least one upper printed wire, connected to the upper electrode point; and a lower circuit pattern, coated on the surface of the second light-transmitting film facing the first light-transmitting film, including: at least one lower electrode point, located in the contact pressure area , maintaining a space between the upper electrode point and the upper electrode point, and there is no obstacle in the space; and at least one printed wire connected to the lower electrode point.

The aforementioned film circuit board further includes: a third light-transmitting film, sandwiched between the first light-transmitting film and the second light-transmitting film, having at least one first opening, the first opening It is located in the contact pressure area and between the lower electrode point and the upper electrode point.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. It can be seen from the above that in order to achieve the above purpose, the utility model provides a keyboard according to an embodiment of the utility model, which includes a keycap, a return member, a light-emitting layer and a thin film circuit board. The keycap contains a light-transmitting pattern. The light emitting layer outputs light toward the direction of the keycap. The reply piece is located between the key cap and the luminescent layer, and is connected with the key cap. The thin film circuit board is arranged between the recovery part and the light-emitting layer, and has a contact pressure area and at least one light-emitting area. The touch-pressing area is facing the restoring part, and the light-emitting area is at least located in a vertical projection area of the light-transmitting pattern corresponding to the film circuit board. The thin film circuit board includes a plurality of transparent films and at least one transparent adhesive layer. The light-transmitting films are stacked on each other. The light-transmitting adhesive layer is respectively located between any two adjacent light-transmitting films, and fully fills the light-emitting area.

In a variation of this embodiment, the light exit area is only located in the vertical projection area, and the area of the light exit area is equal to the area of the light-transmitting pattern.

In another variation of this embodiment, the area of the light emitting region is substantially equal to the area of the light-transmitting film, that is, larger than the area of the light-transmitting pattern. Moreover, the light-emitting area surrounds the pressure-contact area, wherein the pressure-contact area is hollow and completely surrounded by the light-transmitting adhesive layer.

Another aspect of the present invention is to provide an electronic device with the above-mentioned keyboard and a thin film circuit board.

In an embodiment of the present invention, the thin film circuit board is divided into a plurality of key areas, and each key area is divided into a touch pressure area and at least one light emitting area. The film circuit board includes a first light-transmitting film, a second light-transmitting film and at least one light-transmitting adhesive layer. The second transparent film is stacked on one side of the first transparent film. The light-transmitting adhesive layer is pasted between the first light-transmitting film and the second light-transmitting film, and fully fills the light-emitting area.

In another embodiment of the present invention, the thin film circuit board is divided into a plurality of touch-pressure areas and a single light-emitting area, and the light-emitting area surrounds the touch-pressure areas. The film circuit board includes a first light-transmitting film, a second light-transmitting film and at least one light-transmitting adhesive layer. The second transparent film is stacked on one side of the first transparent film. The light-transmitting adhesive layer is pasted between the first light-transmitting film and the second light-transmitting film, and fully fills the light-emitting area. The light-transmitting adhesive layer includes a plurality of hollow parts, and the hollow parts correspond to the contact pressure areas one by one.

By virtue of the above technical solutions, the thin film circuit board, keyboard and electronic device of the present invention have at least the following advantages and beneficial effects:

To sum up, since the light-transmitting films of the keyboard of the present invention are fully filled with the light-transmitting adhesive layer in the light-emitting area, when the light passes through the film circuit board, it will not be diffused, thereby preventing the light from being diffused. Useless consumption can increase the luminous efficiency, and then output the brightness of the light source.

The above description is only an overview of the technical solutions of the present utility model. In order to better understand the technical means of the present utility model, it can be implemented according to the contents of the description, and in order to make the above-mentioned and other purposes, features and advantages of the present utility model better It is obvious and easy to understand. The preferred embodiments are specifically cited below, together with the accompanying drawings, and detailed descriptions are as follows.

Description of drawings

FIG. 1 is a schematic diagram of the electronic device of the present invention and its keyboard.

Fig. 2 is an A-A sectional view of Fig. 1 under an embodiment.

3A is a schematic plan view of the first light-transmissive film and the first light-transmissive adhesive layer viewed through the thin-film circuit board from the direction D2.

3B is a schematic plan view of a third transparent film.

3C is a schematic plan view of the second light-transmissive film and the second light-transmissive adhesive layer viewed through the thin-film circuit board from the direction D1.

FIG. 4 is a cross-sectional view of another embodiment of the electronic device and its keyboard of the present invention.

Fig. 5 is a sectional view of another embodiment of the keyboard of the present invention.

6A is a schematic plan view of the first light-transmissive film and the first light-transmissive adhesive layer viewed through the thin-film circuit board from the direction D2.

FIG. 6B is a schematic plan view of the third transparent film.

6C is a schematic plan view of the second light-transmissive film and the second light-transmissive adhesive layer viewed through the thin-film circuit board from the direction D1.

FIG. 7 is a cross-sectional view of another embodiment of the electronic device and its keyboard of the present invention.

100: Keyboard 440: The fourth light-transmitting film

200: key element 450: fifth light-transmitting film

210: Keycap 460, 461: The first transparent adhesive layer

211: Pressing surface 462: The first empty part

212: Light-transmitting pattern 470, 471: Second light-transmitting adhesive layer

213: Opaque area 472: The second empty part

300: Reply 480, 481: The third light-transmitting adhesive layer

310: Elastic colloid 482: The second breach

320: Pressing part 500: Light emitting layer

400, 401, 402, 403: 510: light emitting element

Thin film circuit board 520: light guide plate

410: The first light-transmitting film 521: Light-emitting surface

411: upper circuit pattern 522: incident surface

412: Upper printed wire 600: Bottom plate

413: Upper electrode point D1, D2: Direction

420: Second light-transmitting film E: Light-emitting area

421: Lower circuit pattern G: Interval

422: Lower printed wire L: Light

423: Lower electrode point K: Keypad

430: The third light-transmitting film T: Touch area

431: The first breach

Detailed ways

In order to further explain the technical means and effects that the utility model takes to achieve the intended purpose of the invention, below in conjunction with the accompanying drawings and preferred embodiments, its specific implementation methods, Structure, characteristic and effect thereof are as follows in detail.

The utility model provides a thin film circuit board, a keyboard and an electronic device. By fully filling the light-transmitting adhesive layer between the layers of the thin film circuit board corresponding to the positions of light, when the light passes through the thin film circuit board The light-transmitting adhesive layer is filled between the layers of the thin-film circuit board corresponding to the light-emitting positions, so that the light can be avoided from being diffused, resulting in unnecessary consumption, thereby increasing the luminous efficiency and improving the output brightness of the light source.

Referring to FIG. 1 and FIG. 2 , FIG. 1 is a schematic diagram of an electronic device and its keyboard 100 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view along line A-A of FIG. 1 .

According to an embodiment of the present invention, the keyboard 100 sequentially includes a plurality of key elements 200 , a thin film circuit board 400 , a light emitting layer 500 and a bottom plate 600 according to the direction D1.

Each key element 200 includes a keycap 210 and a return piece 300 . Each keycap 210 emerges on the surface of the keyboard 100 . The restoring member 300 is interposed between the keycap 210 and the thin film circuit board 400 , and physically connects the keycap 210 and the thin film circuit board 400 to support the keycap 210 and restore the keycap 210 . The return member 300 is, for example, a funnel-shaped elastic rubber 310 (as shown in FIG. 2 ), a linkage device (not shown in the figure), or a combination of both. The return member 300 extends a pressing portion 320 toward the direction D1 of the film circuit board 400 . The light emitting layer 500 includes at least one light emitting element 510 (such as a light emitting diode, LED) and a light guide plate 520 . The light guide plate 520 is parallel to one side of the thin film circuit board 400 and has a light emitting surface 521 and a light incident surface 522 . The light emitting surface 521 faces the thin film circuit board 400 and the key element 200 , and the light incident surface 522 faces the light emitting element 510 . The bottom plate 600 is located on one side of the light emitting layer 500 for supporting the light emitting layer 500 , the thin film circuit board 400 and each key element 200 .

In addition, the keycap 210 has a pressing surface 211, and the pressing surface 211 has one or more transparent patterns 212 and an opaque area 213 (such as a black mask or coating). The light-transmitting pattern 212 corresponds to the light-emitting surface 521 to display the light L. As shown in FIG. The transparent pattern 212 is, for example, a character symbol, a number symbol, a geometric shape symbol or a combination thereof. The opaque area 213 surrounds the light-transmitting pattern 212 and is the other area of the keycap 210 relative to the light-transmitting pattern 212 . Therefore, the light L of the light-emitting layer 500 can be transmitted through the light-transmitting pattern 212 more clearly.

Referring to FIG. 2 and FIG. 3A to FIG. 3C , FIG. 3A is a schematic plan view of the first light-transmitting adhesive layer 460 and the first light-transmitting film 410 viewed from the thin-film circuit board 400 in the direction D2 in FIG. 2 . FIG. 3B is a schematic plan view of the third transparent film 430 in FIG. 2 . FIG. 3C is a schematic plan view of the second light-transmitting adhesive layer 470 and the second light-transmitting film 420 viewed from the thin film circuit board 400 in the direction D1 in FIG. 2 .

The thin film circuit board 400 is arranged between the key element 200 and the light-emitting layer 500, and has a plurality of key areas K corresponding to each key element 200 on its plane, and each key area K can be roughly divided into a plurality of light-emitting areas E and a Touch area T. These touch pressure areas T are set corresponding to the key elements 200 one by one. Each of the light-emitting regions E corresponds to a light-transmitting pattern 212 one by one, which can be said to be set in a vertical projection area where each of the light-transmitting patterns 212 respectively corresponds to the thin film circuit board 400 . Specifically, the area of each light-transmitting pattern 212 distributed on the keycap 210 in this embodiment is equal to the area of the light-emitting area E distributed on the thin film circuit board 400 . However, in another variation, each key area can be roughly simplified into a single light-emitting area and a single touch-press area.

In this embodiment, the thin film circuit board 400 includes a plurality of transparent films, the number of which is more than three. Specifically, the film circuit board 400 at least includes a first light-transmitting film 410, a second light-transmitting film 420, a third light-transmitting film 430, an upper circuit pattern 411, a lower circuit pattern 421, a first light-transmitting film The adhesive layer 460 and a second transparent adhesive layer 470 ( FIG. 2 ). The first light-transmitting film 410, the third light-transmitting film 430, and the second light-transmitting film 420 are sequentially stacked into a multi-layer film by the first light-transmitting adhesive layer 460 and the second light-transmitting adhesive layer 470, wherein the upper The circuit pattern 411 is coated on the surface of the first transparent film 410 facing the second transparent film 420 , and the lower circuit pattern 421 is coated on the surface of the second transparent film 420 facing the first transparent film 410 . The third light-transmitting film 430 is located between the first light-transmitting film 410 and the second light-transmitting film 420, and can electrically isolate the upper circuit pattern 411 inside the first light-transmitting film 410 from the lower circuit pattern inside the second light-transmitting film 420 421 is electrically connected.

The first light-transmitting film 410 and the third light-transmitting film 430 are combined with each other by the first light-transmitting adhesive layer 460, so the first light-transmitting adhesive layer 460 is sandwiched between the first light-transmitting film 410 and the third light-transmitting film 430, and the first light-transmitting adhesive layer 460 is fully filled in the area between the first light-transmitting film 410 and the third light-transmitting film 430 relative to the light-emitting region E, so that the first light-transmitting film 410 and the second light-transmitting film 410 The area between the three light-transmitting films 430 opposite to the light-emitting area E may not contain air. On the contrary, the area between the first light-transmitting film 410 and the third light-transmitting film 430 relative to each contact pressure area T is hollow without the first light-transmitting adhesive layer 460 .

The second light-transmitting film 420 and the third light-transmitting film 430 are combined with each other through the second light-transmitting adhesive layer 470, so the second light-transmitting adhesive layer 470 is sandwiched between the second light-transmitting film 420 and the third light-transmitting film 430, and the second light-transmitting adhesive layer 470 is fully filled in the area between the second light-transmitting film 420 and the third light-transmitting film 430 relative to the light-emitting region E, so that the second light-transmitting film 420 and the first light-transmitting film 420 There may be no air in the area between the three light-transmitting films 430 relative to the light-emitting area E. On the contrary, the area between the second light-transmitting film 420 and the third light-transmitting film 430 relative to each contact pressure area T does not have the second light-transmitting adhesive layer 470 and is hollow.

The upper circuit pattern 411 includes a plurality of upper printed wires 412 and a plurality of upper electrode points 413 . The upper printed wires 412 are respectively connected to one of the upper electrode points 413 . The upper electrode points 413 are respectively located in the contact pressure regions T one by one, and are not covered by the first transparent adhesive layer 460 . The lower circuit pattern 421 includes a plurality of lower printed wires 422 and a plurality of lower electrode points 423 . These lower printed wires 422 are respectively connected to one of the lower electrode points 423 . The lower electrode points 423 are respectively located in the contact pressure regions T one by one, and are not covered by the second transparent adhesive layer 470 , and are respectively facing the upper electrode points 413 one by one. Moreover, these lower electrode points 423 maintain a distance G from the corresponding upper electrode points 413 one by one, and there is no obstacle in the distance G.

In addition, the third transparent film 430 has a plurality of first openings 431 . These first openings 431 are respectively located in these contact pressure regions T one by one, and are located between the corresponding lower electrode point 423 and upper electrode point 413, so that the first light-transmitting film 410 and the third light-transmitting film 430 relative to each contact pressure area T and the area between the second light-transmitting film 420 and the third light-transmissive film 430 relative to each contact pressure area T can pass through the corresponding first opening 431 to contact each other. Pass. In this way, the lower electrode points 423 can respectively maintain an unobstructed distance G from the corresponding upper electrode points 413 , so as to provide the upper electrode points 413 to physically/electrically contact the lower electrode points 423 .

In this way, since the area between each light-transmitting film relative to the light-emitting area E is filled with light-transmitting adhesive material, when the light L of the light guide plate 520 passes through the film circuit board 400 through the light-emitting surface 521, the light L will be effectively The luminous efficiency is increased and the output brightness of the light source is increased by the light-emitting area E moving toward the direction of the light-transmitting patterns 212 (the direction D2 in the figure).

Referring to FIG. 4 , FIG. 4 is a cross-sectional view of another embodiment of the electronic device of the present invention and its keyboard 100 .

In another embodiment, the number of light-transmitting films of the thin film circuit board 401 can also be simplified to two. Specifically, the thin film circuit board 401 includes a fourth transparent film 440 , a fifth transparent film 450 and a third transparent adhesive layer 480 . The fourth light-transmitting film 440 and the fifth light-transmitting film 450 are laminated with each other through the third light-transmitting adhesive layer 480 to form a multi-layer film. The upper circuit pattern 411 is coated on the surface of the fourth transparent film 440 facing the fifth transparent film 450 . The lower circuit pattern 421 is coated on the surface of the fifth transparent film 450 facing the fourth transparent film 440 . The third light-transmitting adhesive layer 480 is located between the fourth light-transmitting film 440 and the fifth light-transmitting film 450, so that a gap can be generated between the fourth light-transmitting film 440 and the fifth light-transmitting film 450 to electrically isolate the fourth light-transmitting film 450. The upper circuit pattern 411 inside the light film 440 is electrically connected to the lower circuit pattern 421 inside the fifth light-transmitting film 450, and is fully filled between the fourth light-transmitting film 440 and the fifth light-transmitting film 450 relative to In the area of the light-exiting area E, the area between the fourth light-transmitting film 440 and the fifth light-transmitting film 450 relative to the light-exiting area E may be free of air.

The features of the upper circuit pattern 411 and the lower circuit pattern 421 are the same as above, so they will not be repeated here. Referring to FIG. 5 and FIG. 6A to FIG. 6C , FIG. 5 is a cross-sectional view of another embodiment of the keyboard 100 of the present invention. FIG. 6A is a schematic plan view of the first transparent film 410 and the first transparent adhesive layer 461 viewed from the thin film circuit board 402 in the direction D2 in FIG. 5 . FIG. 6B is a schematic plan view of the third transparent film 430 in FIG. 5 . 6C is a schematic plan view of the second transparent film 420 and the second transparent adhesive layer 471 viewed from the thin film circuit board 402 in the direction D1 in FIG. 5 .

The thin film circuit board 402 is disposed between the key element 200 and the light emitting layer 500 , and can be roughly divided into a light emitting area E and a plurality of touch pressure areas T on a plane. Each touch-pressure area T is provided corresponding to the key elements 200 one by one, and is surrounded by the light-emitting area E ( FIG. 6A ). In this embodiment, the film circuit board 402 includes a plurality of light-transmitting films, the number of which is more than three. Specifically, the film circuit board 402 at least includes a first light-transmitting film 410, a second light-transmitting film 420, a third light-transmitting film 430, an upper circuit pattern 411, a lower circuit pattern 421, a first light-transmitting film The adhesive layer 461 and a second transparent adhesive layer 471 ( FIG. 5 ). The first light-transmitting film 410, the third light-transmitting film 430, and the second light-transmitting film 420 are sequentially stacked to form a multi-layer film through the first light-transmitting adhesive layer 461 and the second light-transmitting adhesive layer 471, wherein the upper The circuit pattern 411 is coated on the surface of the first transparent film 410 facing the second transparent film 420 , and the lower circuit pattern 421 is coated on the surface of the second transparent film 420 facing the first transparent film 410 . The third light-transmitting film 430 is located between the first light-transmitting film 410 and the second light-transmitting film 420, and can electrically isolate the upper circuit pattern 411 inside the first light-transmitting film 410 from the lower circuit pattern inside the second light-transmitting film 420 421 is electrically connected.

The first light-transmitting film 410 and the third light-transmitting film 430 are combined with each other by the first light-transmitting adhesive layer 460, so the first light-transmitting adhesive layer 460 is sandwiched between the first light-transmitting film 410 and the third light-transmitting film 430, and the first light-transmitting adhesive layer 461 is fully filled in the area between the first light-transmitting film 410 and the third light-transmitting film 430 relative to the light-emitting region E, so that the first light-transmitting film 410 and the third light-transmitting film 430 There is almost no air in the area between the three light-transmitting films 430 relative to the light-emitting area E. In addition, the first light-transmitting adhesive layer 461 is only located in the region between the first light-transmitting film 410 and the third light-transmitting film 430 relative to the light-emitting area E, so the first light-transmitting adhesive layer 461 surrounds these contact-pressing areas The area of T has a first hollow portion 462 , so that the area between the first light-transmitting film 410 and the third light-transmitting film 430 relative to each contact pressure area T has no light-transmitting adhesive layer and is hollow.

The second light-transmitting film 420 and the third light-transmitting film 430 are combined with each other through the second light-transmitting adhesive layer 471, so the second light-transmitting adhesive layer 471 is sandwiched between the second light-transmitting film 420 and the third light-transmitting film 430, and the second light-transmitting adhesive layer 471 is fully filled in the area between the second light-transmitting film 420 and the third light-transmitting film 430 relative to the light-emitting region E, so that the second light-transmitting film 420 and the first light-transmitting film 420 There is almost no air in the area between the three light-transmitting films 430 relative to the light-emitting area E. In addition, the second light-transmitting adhesive layer 471 is only located in the region between the second light-transmitting film 420 and the third light-transmitting film 430 relative to the light-emitting area E, so the second light-transmitting adhesive layer 471 surrounds these contact-pressing areas The area of T has a second hollow portion 472 , so that the area between the second light-transmitting film 420 and the third light-transmitting film 430 relative to each contact pressure area T has no light-transmitting adhesive layer and is hollow.

The features of the upper circuit pattern 411 and the lower circuit pattern 421 are the same as above, so they will not be repeated here, except that the upper printed wires 412 are covered by the first transparent adhesive layer 461 in the light emitting area E. The lower printed wires 422 are covered by the second transparent adhesive layer 471 in the light emitting area E. In addition, the features of the first opening 431 of the third light-transmitting film 430 are the same as above, so details will not be repeated here.

In this way, since the area between each light-transmitting film relative to the light-emitting area E is filled with light-transmitting adhesive material, when the light L of the light guide plate 520 passes through the film circuit board 400 through the light-emitting surface 521, a large amount of light L will be made Going in the direction of these key elements 200 (direction D2 in the figure), so as to increase the luminous efficiency and increase the output brightness of the light source.

Referring to Fig. 7, Fig. 7 is a sectional view of the electronic device of the present invention and its keyboard 100 in yet another embodiment. In this embodiment, the number of light-transmitting films of the thin film circuit board 403 can also be simplified to two. Specifically, the thin film circuit board 403 includes a fourth transparent film 440 , a fifth transparent film 450 and a third transparent adhesive layer 481 . The fourth light-transmitting film 440 and the fifth light-transmitting film 450 are laminated with each other to form a multi-layer film through the third light-transmitting adhesive layer 481 . The upper circuit pattern 411 is coated on the surface of the fourth transparent film 440 facing the fifth transparent film 450 . The lower circuit pattern 421 is coated on the surface of the fifth transparent film 450 facing the fourth transparent film 440 . The third light-transmitting adhesive layer 481 is located between the fourth light-transmitting film 440 and the fifth light-transmitting film 450, and can electrically isolate the upper circuit pattern 411 inside the fourth light-transmitting film 440 from the lower circuit inside the fifth light-transmitting film 450 The pattern 421 is electrically connected, and is fully filled in the area between the fourth light-transmitting film 440 and the fifth light-transmitting film 450 relative to the light-emitting area E, so that the fourth light-transmitting film 440 and the fifth light-transmitting film There is almost no air in the area between 450 and relative to the light exit area E. The third light-transmitting adhesive layer 481 is only located in the area between the fourth light-transmitting film 440 and the fifth light-transmitting film 450 relative to the light-emitting area E, so the third light-transmitting adhesive layer 481 surrounds these contact pressure areas T, The region between the fourth light-transmitting film 440 and the fifth light-transmitting film 450 relative to each contact pressure area T is hollow without a light-transmitting adhesive layer.

The features of the upper circuit pattern 411 and the lower circuit pattern 421 are the same as above, so they will not be repeated here. Both the upper printed wire 412 of the upper circuit pattern 411 and the lower printed wire 422 of the lower circuit pattern 421 are covered by the third transparent adhesive layer 481 .

In addition, the third transparent adhesive layer 481 has a plurality of second openings 482 . These second openings 482 are respectively located in these contact pressure regions T one by one, and are located between the corresponding lower electrode point 423 and upper electrode point 413, so that the fourth light-transmitting film 440 and the fifth light-transmitting film The contact pressure regions T between 450 can be connected to each other through the corresponding second opening 482 . In this way, the lower electrode points 423 can maintain a distance G from the corresponding upper electrode points 413 respectively, and there is no obstacle in the distance G, so as to provide the upper electrode points 413 to physically/electrically contact the lower electrode points 423 .

The type of the keyboard 100 of the present invention is not limited to an independent keyboard (such as a wired or wireless keyboard device) or an embedded keyboard assembled in a portable electronic device (such as a notebook computer or a mobile phone). The types of the foregoing keyboards of the present invention are not limited to general keyboards, chocolate keyboards, island keyboards or floating keyboards and the like.

The keyboard 100 disclosed in the above-mentioned embodiments of the present invention can be applied to an electronic device, so that the keyboard of the electronic device can provide better light output quality. The utility model is not limited to the type of electronic device, as long as the electronic device with the aforementioned keyboard is within the scope of protection of the utility model, the electronic device of the utility model is not limited to a notebook computer, a mobile phone, a video camera, a camera, a game, etc. machine, language translator, music player, display screen, digital photo frame and lighting appliance.

The above are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any Those who are familiar with this profession can use the technical content disclosed above to make some changes or modify equivalent embodiments of equivalent changes without departing from the scope of the technical solution of the present utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (16)

1. A keyboard, characterized in that it comprises: A key cap, including at least one light-transmitting pattern; a light-emitting layer that outputs light toward the direction of the keycap; and a return piece, located between the keycap and the light-emitting layer, and connected to the keycap; and A thin-film circuit board, arranged between the reply member and the luminescent layer, has a touch-press area and at least one light-emitting area, the touch-press area is facing the return member, and the light-exit area is at least located on the thin film corresponding to the light-transmitting pattern A vertical projection area of a circuit board, the thin film circuit board comprising: A plurality of light-transmitting films are stacked on each other; and at least one light-transmitting adhesive layer is located between any two adjacent said light-transmitting films and fully fills the light-emitting area. 2. The keyboard according to claim 1, wherein the light emitting area is only located in the vertical projection area, and the area of the light emitting area is equal to the area of the light-transmitting pattern. 3. The keyboard according to claim 1, wherein the area of the light-emitting area is larger than the area of the light-transmitting pattern, and the light-emitting area surrounds the touch-pressure area, wherein the touch-pressure area is hollow, and It is completely surrounded by the light-transmitting adhesive layer. 4. The keyboard according to claim 3, wherein said thin film circuit board further comprises: An upper circuit pattern, coated on one surface of the light-transmitting film, includes an upper electrode point, the upper electrode point is located in the contact pressure area, and is facing the reply member; and A lower circuit pattern, coated on the other surface of the light-transmitting film, includes a lower electrode point, the lower electrode point is located in the contact pressure area, facing the upper electrode point, and keeping a distance from the upper electrode point, and There is no obstacle between the upper electrode point. 5. The keyboard according to claim 4, wherein the number of said light-transmitting films is more than 3, wherein one of said light-transmitting films is sandwiched between two said light-transmitting films, and electrically The upper circuit pattern and the lower circuit pattern are isolated, wherein the sandwiched light-transmitting film has a first opening, and the first opening is located in the contact pressure area, and is located between the lower electrode point and the upper electrode point between. 6. The keyboard according to claim 4, wherein the number of said light-transmitting films is two. 7. The keyboard according to claim 6, wherein the light-transmitting glue layer between the light-transmitting films blocks the contact between the upper circuit pattern and the lower circuit pattern. 8 . The keyboard according to claim 7 , wherein the light-transmitting adhesive layer between the light-transmitting films has a second opening, and the second opening is located in the contact pressure area. 9. The keyboard according to claim 4, wherein the upper circuit pattern further comprises an upper printed wire connected to the upper electrode point and covered by the at least one transparent adhesive layer, The lower circuit pattern further includes a printed wire connected to the lower electrode point and covered by the at least one transparent adhesive layer. 10. An electronic device, characterized in that it comprises: A keyboard as claimed in one of claims 1 to 9. 11. A thin film circuit board, characterized in that it is divided into a plurality of button areas, and each button area is divided into a touch pressure area and at least one light emitting area, including: a first light-transmitting film; A second light-transmitting film stacked on one side of the first light-transmitting film; and At least one light-transmitting adhesive layer is pasted between the first light-transmitting film and the second light-transmitting film, and fully fills the light-emitting area. 12. The thin film circuit board according to claim 11, further comprising: An upper circuit pattern, coated on the surface of the first light-transmitting film facing the second light-transmitting film, comprising: At least one upper electrode point is located in the contact pressure area; at least one upper printed wire connected to the upper electrode point; and The following circuit patterns are coated on the surface of the second light-transmitting film facing the first light-transmitting film, including: At least one lower electrode point is located in the contact pressure area, facing the upper electrode point, keeping a distance from the upper electrode point, and there is no obstacle in the distance; and Print wires at least once to connect the lower electrode points. 13. The thin film circuit board according to claim 12, further comprising: A third light-transmitting film is sandwiched between the first light-transmitting film and the second light-transmitting film, and has at least one first opening, the first opening is located in the contact pressure area, and is located in the Between the lower electrode point and the upper electrode point. 14. A thin film circuit board, characterized in that it is divided into a plurality of contact pressure areas and a light output area, the light output area surrounds the contact pressure area, and the thin film circuit board comprises: a first light-transmitting film; A second light-transmitting film stacked on one side of the first light-transmitting film; and At least one light-transmitting adhesive layer is located between the first light-transmitting film and the second light-transmitting film, and fully fills the light-emitting area, and includes a plurality of hollow parts, and the hollow parts correspond to the The touch pressure zone. 15. The thin film circuit board according to claim 14, characterized in that it further comprises: An upper circuit pattern, coated on the surface of the first light-transmitting film facing the second light-transmitting film, comprising: At least one upper electrode point is located in the contact pressure area; at least one upper printed wire connected to the upper electrode point; and The following circuit patterns are coated on the surface of the second light-transmitting film facing the first light-transmitting film, including: At least one lower electrode point is located in the contact pressure area, facing the upper electrode point, keeping a distance from the upper electrode point, and there is no obstacle in the distance; and Print wires at least once to connect the lower electrode points. 16. The thin film circuit board according to claim 15, further comprising: A third light-transmitting film is sandwiched between the first light-transmitting film and the second light-transmitting film, and has at least one first opening, the first opening is located in the contact pressure area, and is located in the Between the lower electrode point and the upper electrode point.

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