CN217333917U

CN217333917U - Keyboard assembly

Info

Publication number: CN217333917U
Application number: CN202221286110.5U
Authority: CN
Inventors: 李忠弼; 林楷力; 张琼文; 高洁; 庄雅婷; 罗元灿
Original assignee: MSI Computer Shenzhen Co Ltd
Current assignee: MSI Computer Shenzhen Co Ltd
Priority date: 2022-02-23
Filing date: 2022-05-25
Publication date: 2022-08-30
Anticipated expiration: 2032-05-25
Also published as: TWM627927U

Abstract

A keyboard assembly comprises a base, a first keycap, a second keycap, a light guide assembly and a first light-emitting element. The first keycap is provided with a first light-emitting surface. The second keycap is provided with a second light-emitting surface. The light guide assembly comprises a light guide plate, a first filtering pattern and a second filtering pattern. The light guide plate has a low beam side and a high beam side opposite to each other. The first and second filtering patterns are disposed on the light guide plate. The first light-emitting surface and the second light-emitting surface face away from the light guide plate. The light emitted by the first light-emitting element enters the light guide plate from the low-beam side and is respectively sent towards the first light-emitting surface and the second light-emitting surface through the first filter pattern and the second filter pattern. The first light filtering pattern is closer to the near light side than the second light filtering pattern, and the ratio of the total area of the first light filtering pattern to the total area of the first light emitting surface is smaller than the ratio of the total area of the second light filtering pattern to the total area of the second light emitting surface.

Description

Keyboard assembly

Technical Field

The utility model relates to a keyboard subassembly especially relates to a keyboard subassembly that contains leaded light subassembly.

Background

Desktop computers or notebook computers are usually used with a keyboard to facilitate the user to input commands. In recent years, light-emitting keyboards have been widely used in the field of electronic competitions. When the luminous keyboard is used, the keycaps emit light with different colors, and the luminous keyboard can present rich visual effects.

However, in order to enhance the visual effect of the light emitted from each of the key caps (e.g., to make the key caps emit light uniformly), the light emitting keyboard is usually provided with at least one light emitting element for each of the key caps. In the case of using such an arrangement, since the number of key caps of the keyboard is large, the light-emitting keyboard needs to include many light-emitting elements, and the light-emitting keyboard has a problem of an excessively high manufacturing cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a keyboard subassembly to reduce keyboard subassembly's manufacturing cost.

An embodiment of the present invention discloses a keyboard assembly including a base, a first key cap, a second key cap, at least one light guide assembly and at least one first light emitting element. The first keycap is arranged on the base and provided with a first light-emitting surface. The second keycap is arranged on the base and is provided with a second light-emitting surface. The light guide assembly comprises a light guide plate, a first filtering pattern and a second filtering pattern. The light guide plate has a low beam side and a high beam side opposite to each other. The first light filtering pattern and the second light filtering pattern are arranged on the light guide plate and between the low-beam side and the high-beam side. The light guide plate is positioned on one side of the first keycap and one side of the second keycap close to the base. The first light-emitting surface and the second light-emitting surface face away from the light guide plate. The first light-emitting element is arranged on the base. The light emitted by the first light-emitting element enters the light guide plate from the low-beam side and is transmitted towards the first light-emitting surface and the second light-emitting surface through the first filter pattern and the second filter pattern respectively. The first light filtering pattern is closer to the near light side than the second light filtering pattern, and the ratio of the total area of the first light filtering pattern to the total area of the first light emitting surface is smaller than the ratio of the total area of the second light filtering pattern to the total area of the second light emitting surface.

According to the present invention, the light guide plate further comprises a third key cap disposed on the base and having a third light-emitting surface facing away from the light guide plate, the at least one light guide assembly further comprises a third light-filtering pattern disposed on the light guide plate, the first light-filtering pattern has a color different from that of the third light-filtering pattern, the first light-filtering pattern and the third light-filtering pattern are separated from the short-beam side by the same distance, and the ratio of the total area of the first light-filtering pattern to that of the first light-emitting surface is different from that of the third light-filtering pattern to that of the third light-emitting surface.

According to one embodiment of the present invention, the light guide plate has a first outer surface and a second outer surface, the first outer surface and the second outer surface are opposite to each other, the first outer surface is far away from the first key cap and the second key cap than the second outer surface, and the first filter pattern and the second filter pattern are disposed on the first outer surface of the light guide plate.

According to one embodiment of the present invention, the light guide plate further comprises at least one second light emitting element, the number of the at least one light guide assembly is two, the two light guide plates of the two light guide assemblies are parallel to each other and separated from each other, the at least one second light emitting element is disposed on the base, and the at least one first light emitting element and the at least one second light emitting element are respectively configured to transmit light to the two light guide plates from the two low beam sides of the two light guide plates.

According to one embodiment of the present invention, the at least one first light emitting element and the at least one second light emitting element are respectively disposed on two opposite sides of the base, the light emitted from the at least one second light emitting element is transmitted through the second filtering pattern of one of the light guiding assemblies and the first filtering pattern of another one of the light guiding assemblies towards the first light emitting surface, and the light emitted from the at least one second light emitting element is transmitted through the first filtering pattern of one of the light guiding assemblies and the second filtering pattern of another one of the light guiding assemblies towards the second light emitting surface.

According to one embodiment of the present invention, the ratio of the total area of the first filter pattern of one of the light guide assemblies and the total area of the second filter pattern of the other one of the light guide assemblies to the total area of the first light emitting surface is different from each other.

According to one embodiment of the present invention, the second filter pattern of one of the light guide assemblies and the first filter pattern of the other of the light guide assemblies have different colors.

According to the present invention, the light guide assembly further comprises two first embossed structures, the two first embossed structures are located on the first outer surface of the light guide plate, and the first filter pattern and the second filter pattern are respectively formed on the two first embossed structures.

According to this utility model discloses one of them embodiment, this leaded light subassembly still contains two second impressed watermark structures, and these two second impressed watermark structures are located this second external surface of this light guide plate, and these two first impressed watermark structures optical coupling respectively in these two second impressed watermark structures.

According to the present invention, the display device further comprises a reflective film disposed on the base and located on one side of the light guide plate of the light guide assembly away from the first key cap and the second key cap.

According to the keyboard assembly disclosed in the above embodiments, the light emitted by the first light-emitting element is transmitted toward the first light-emitting surface of the first keycap and the second light-emitting surface of the second keycap through the light guide assembly. Therefore, the light emitted by the single light emitting element can be transmitted towards the light emitting surfaces of the plurality of keycaps through the assistance of the light guide assembly. Therefore, a light-emitting element is not required to be configured for each keycap, the number of the light-emitting elements contained in the keyboard assembly can be reduced, and the manufacturing cost of the keyboard assembly is further reduced.

In addition, the first filter pattern is closer to the low beam side than the second filter pattern, and the ratio of the total area of the first filter pattern to the total area of the first light emitting surface is smaller than the ratio of the total area of the second filter pattern to the total area of the second light emitting surface. That is, the filter pattern farther from the low beam side has a higher density. Therefore, although the light emitted from the light emitting element reaches the second filter pattern farther from the low beam side with a weaker intensity than the first filter pattern closer to the low beam side, the density of the second filter pattern is higher than that of the first filter pattern. Therefore, the first light-emitting element can still uniformly emit light towards the first light-emitting surface and the second light-emitting surface through the first filter pattern and the second filter pattern.

Drawings

Fig. 1 is a top view of a keyboard assembly according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the keyboard assembly of fig. 1 along section line a-a'.

Fig. 3 is a partially enlarged view of a cross-sectional view of the keyboard assembly of fig. 2.

Fig. 4 is a cross-sectional view of the keyboard assembly of fig. 1 along section line B-B'.

Fig. 5 is a partially enlarged view showing a bottom view of the first light emitting element and one of the light guide assemblies.

Fig. 6 is a partially enlarged view showing a bottom view of the second light emitting element and another light guide assembly.

The reference numbers are as follows:

10 keyboard assembly

100 base

150 thin film circuit board

200 first key cap

201 first light-emitting surface

250 second key cap

251 second light-emitting surface

300: third key cap

301 the third light-emitting surface

350. 450 light guide assembly

351. 451 light guide plate

3510. 4510 near light side

3511 high beam side

3512 first outer surface

3513 second outer surface

352. 452 first filter pattern

353. 453 second Filter Pattern

354 third Filter Pattern

355 first embossing structure

356 second embossing Structure

500 first light emitting element

550 second light emitting element

600 reflective film

Detailed Description

The detailed features and advantages of the embodiments of the present invention are described in detail below in the detailed description, which is sufficient for a person skilled in the art to understand the technical content of the embodiments of the present invention and to implement the embodiments, and the related objects and advantages of the present invention can be easily understood by the person skilled in the art from the disclosure, claims and drawings of the present specification. The following examples further illustrate the aspects of the present invention in detail, but do not limit the scope of the present invention in any way.

Referring to fig. 1 to 4, fig. 1 is a top view of a keyboard assembly according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of the keyboard assembly of fig. 1 along section line a-a'. Fig. 3 is a partially enlarged view of a cross-sectional view of the keyboard assembly of fig. 2. Fig. 4 is a cross-sectional view of the keyboard assembly of fig. 1 along section line B-B'.

In the present embodiment, the keyboard assembly 10 includes a base 100, a thin film circuit board 150, a first key cap 200, a second key cap 250, a third key cap 300, two

light guide elements

350 and 450, a plurality of first light emitting elements 500, and a plurality of second light emitting elements 550. In the present embodiment, the keyboard assembly 10 is disposed in a main housing of a notebook computer, for example, but not limited thereto. In other embodiments, the keyboard assembly may also be a stand-alone keyboard that can be plugged into a desktop computer.

The thin film circuit board 150 is disposed in the base 100 and is, for example, a transparent thin film circuit board. The first keycap 200, the second keycap 250, and the third keycap 300 are disposed on the base 100 through the thin film circuit board 150 and separated from each other. The first key cap 200 has a first light emitting surface 201. The second key cap 250 has a second light emitting surface 251. The third key cap 300 has a third light emitting surface 301.

The light guide assembly 350 includes a light guide plate 351, a first filter pattern 352, a second filter pattern 353, and a third filter pattern 354. The light guide plate 351 has a low beam side 3510 and a high beam side 3511 opposite to each other. In addition, in the embodiment, the light guide plate 351 further has a first outer surface 3512 and a second outer surface 3513 opposite to each other. The first outer surface 3512 and the second outer surface 3513 are between the low beam side 3510 and the high beam side 3511. The first outer surface 3512 is further from the first keycap 200, the second keycap 250, and the third keycap 300 than the second outer surface 3513. The first, second, and

third filter patterns

352, 353, and 354 are disposed on the first outer surface 3512 of the light guide plate 351 and between the low beam side 3510 and the high beam side 3511. The light guide plate 351 is located at a side of the first keycap 200, the second keycap 250, and the third keycap 300 close to the base 100. The first light emitting surface 201, the second light emitting surface 251 and the third light emitting surface 301 face away from the light guide plate 351.

In other embodiments, the first filter pattern, the second filter pattern and the third filter pattern may also be disposed on the second outer surface of the light guide plate.

Referring to fig. 2 and 5, fig. 5 is a partially enlarged view showing a bottom view of the first light emitting element and one of the light guide elements. As shown in fig. 5, the first filter pattern 352 is closer to the low beam side 3510 than the second filter pattern 353. The ratio of the total area of the first filter patterns 352 to the total area of the first light emitting surface 201 is smaller than the ratio of the total area of the second filter patterns 353 to the total area of the second light emitting surface 251, that is, the arrangement density of the first filter patterns 352 is smaller than the arrangement density of the second filter patterns 353.

It should be noted that, in the present disclosure, if the total area of the first filter pattern 352 is represented by a1 and the total area of the first light emitting surface 201 is represented by a2, the ratio of the total area of the first filter pattern 352 to the total area of the first light emitting surface 201 is a1/a2, and similar descriptions are omitted.

As further shown in fig. 5, the first filter pattern 352 has a color different from that of the third filter pattern 354. The first and

third filter patterns

352 and 354 are spaced apart from the low beam side 3510 by the same distance. The ratio of the total area of the first filter pattern 352 to the total area of the first light emitting surface 201 is different from the ratio of the total area of the third filter pattern 354 to the total area of the third light emitting surface 301. For example, the third filter pattern 354 needs to have a larger disposing density for red color, so that the ratio of the total area of the first filter pattern 352 to the total area of the first light emitting surface 201 is smaller than the ratio of the total area of the third filter pattern 354 to the total area of the third light emitting surface 301. In this way, light can more uniformly pass through the first filter pattern 352 and the third filter pattern 354 with different colors.

It should be noted that in other embodiments, the light guide element does not need to include two filter patterns separated from the near light side by the same distance but different colors.

In the present embodiment, the light guide assembly 350 further includes three first embossed structures 355 and three second embossed structures 356. Since the three first embossed structures 355 correspond to the first, second, and

third filter patterns

352, 353, and 354 in a similar manner, respectively, and the three second embossed structures 356 correspond to the first, second, and

third filter patterns

352, 353, and 354 in a similar manner, only one of the first embossed structures 355 and one of the second embossed structures 356 correspond to the first filter pattern 352, as illustrated in fig. 3. As shown in fig. 3, the first embossing structure 355 is located on the first outer surface 3512 of the light guide plate 351. The second embossing structure 356 is located on the second outer surface 3513 of the light guide plate 351. The first filter pattern 352 is formed on the first embossed structure 355. The first embossed structure 355 is optically coupled to the second embossed structure 356, i.e., light energy is transmitted between the first embossed structure 355 and the second embossed structure 356. It should be noted that, although not shown in the drawings, it should be understood that the three first embossing structures 355 are optically coupled to the three second embossing structures 356, respectively.

In other embodiments, the light guide element may not include the second embossing structure 356. Alternatively, in still other embodiments, the light guide element does not need to include the first embossed structures 355 and the second embossed structures 356.

The two

light guiding assemblies

350, 450 are similar to each other in structure, keeping in mind that the light guiding assembly 450 differs from the light guiding assembly 350, and reference is made to the detailed description of the light guiding assembly 350 for the remaining similar structures. Referring to fig. 5 and 6, fig. 6 is a partially enlarged view showing a bottom view of the second light emitting element and another light guide element. As shown in fig. 2, 5 and 6, the two

light guide assemblies

350 and 450 are different only in the installation position and the arrangement of the filter patterns. Specifically, the ratio of the total area of the first filter patterns 352 and the second filter patterns 453 of the light guide assembly 350 and the light guide assembly 450 to the total area of the first light emitting surface 201 is different, that is, the first filter patterns 352 and the second filter patterns 453 corresponding to the same first light emitting surface 201 have different arrangement densities. Also, the second filter pattern 353 of the light guide assembly 350 and the first filter pattern 452 of the light guide assembly 450 have different colors. That is, the second filter pattern 353 and the first filter pattern 452 corresponding to the same second light emitting surface 251 have different colors. In addition, as shown in fig. 2, the two

light guide plates

351, 451 of the two

light guide assemblies

350, 450 are parallel to and separated from each other, and the light guide plate 351 is closer to the first keycap 200, the second keycap 250 and the third keycap 300 than the light guide plate 451.

Referring to fig. 2 to 4, the first light emitting device 500 and the second light emitting device 550 are, for example, light emitting diodes emitting white light. The first light emitting element 500 and the second light emitting element 550 are respectively disposed on two opposite sides of the base 100 and respectively transmit light from the two

low beam sides

3510 and 4510 of the two

light guide plates

351 and 451 to the two

light guide plates

351 and 451. Since the first light emitting element 500 and the second light emitting element 550 transmit light to the two

light guide plates

351 and 451 in a similar manner, the following description will be mainly given by taking the first light emitting element 500 and the light guide plate 351 as an example. The light emitted from the first light emitting device 500 enters the light guide plate 351 from the low beam side 3510 and is transmitted through the first filter pattern 352, the second filter pattern 353 and the third filter pattern 354 toward the first light emitting surface 201, the second light emitting surface 251 and the third light emitting surface 301. In addition, the light emitted from the first light emitting element 500 is transmitted between the first embossed structure 355 and the second embossed structure 356 to increase the refraction effect. It should be noted that the light emitted from the second light emitting element 550 enters the light guide plate 451, and then is transmitted to the first light emitting surface 201, the second light emitting surface 251, and the third light emitting surface 301 through the light guide plate 351. It should be noted that, in the present embodiment, the light emitted from the second light emitting element 550 is transmitted through the second filter pattern 453 and the first filter pattern 352 toward the first light emitting surface 201. In addition, in the present embodiment, the light emitted from the second light emitting element 550 is transmitted through the first filter pattern 452 and the second filter pattern 353 to be emitted toward the second light emitting surface 251. In this way, the second filter patterns 353 and the first filter patterns 452 with different colors can achieve a color mixing effect.

In other embodiments, the first light emitting device and the second light emitting device may be disposed on the same side of the base.

In other embodiments, the ratio of the total area of the two filter patterns corresponding to the same first light emitting surface to the total area of the first light emitting surface in the two light guide assemblies may also be the same. In other embodiments, the two filter patterns corresponding to the same second light-emitting surface in the two light guide assemblies may also have the same color.

In other embodiments, the keyboard assembly may only include one first light emitting element and one second light emitting element. In still other embodiments, the keyboard assembly may only include one light guide assembly, and in such embodiments, the keyboard assembly may not include the second light emitting element.

In the present embodiment, as shown in fig. 2, the keyboard assembly 10 further includes a reflective film 600. The reflective film 600 is disposed on the base 100 and located on a side of the

light guide plates

351 and 451 of the two

light guide elements

350 and 450 away from the first keycap 200, the second keycap 250, and the third keycap 300. As a result, the light incident on the reflective film 600 is reflected by the reflective film 600 toward the first light-emitting surface 201, the second light-emitting surface 251 and the third light-emitting surface 301. In other embodiments, the keyboard assembly may also directly transmit the light through the inner surface of the base to reflect the light toward each light-emitting surface without including the reflective film 600.

According to the keyboard assembly disclosed in the above embodiments, the light emitted by the first light emitting element is transmitted towards the first light emitting surface of the first keycap and the second light emitting surface of the second keycap through the light guide assembly. Therefore, the light emitted by the single light emitting element can be transmitted towards the light emitting surfaces of the plurality of keycaps through the assistance of the light guide assembly. Therefore, a light-emitting element is not required to be configured for each keycap, the number of the light-emitting elements contained in the keyboard assembly can be reduced, and the manufacturing cost of the keyboard assembly is further reduced.

Although the present invention has been described with reference to the foregoing embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A keyboard assembly, comprising:

a base;

the first keycap is arranged on the base and is provided with a first light-emitting surface;

the second keycap is arranged on the base and is provided with a second light-emitting surface;

at least one light guide assembly including a light guide plate, a first filter pattern and a second filter pattern, the light guide plate having a low beam side and a high beam side opposite to each other, the first filter pattern and the second filter pattern being disposed on the light guide plate and between the low beam side and the high beam side, the light guide plate being disposed on one sides of the first keycap and the second keycap close to the base, the first light-emitting surface and the second light-emitting surface being opposite to the light guide plate; and

at least one first light-emitting element arranged on the base, wherein light emitted by the at least one first light-emitting element enters the light guide plate from the low beam side and is transmitted towards the first light-emitting surface and the second light-emitting surface through the first filter pattern and the second filter pattern respectively;

the first light filtering pattern is closer to the near light side than the second light filtering pattern, and the ratio of the total area of the first light filtering pattern to the total area of the first light emitting surface is smaller than the ratio of the total area of the second light filtering pattern to the total area of the second light emitting surface.

2. The keyboard assembly of claim 1, further comprising a third keycap disposed on the base and having a third light emitting surface facing away from the light guide plate, wherein the at least one light guide assembly further comprises a third filter pattern disposed on the light guide plate, wherein a color of the first filter pattern is different from a color of the third filter pattern, the first filter pattern and the third filter pattern are spaced apart from the low beam side by the same distance, and a ratio of a total area of the first filter pattern to a total area of the first light emitting surface is different from a ratio of a total area of the third filter pattern to a total area of the third light emitting surface.

3. A keyboard assembly according to claim 1, wherein the light guide plate has a first outer surface and a second outer surface, the first outer surface and the second outer surface being opposite to each other, the first outer surface being farther from the first and second keycaps than the second outer surface, the first and second filter patterns being disposed on the first outer surface of the light guide plate.

4. The keyboard assembly according to claim 1, further comprising at least one second light emitting element, the at least one light guide element being two in number, the two light guide plates of the two light guide elements being parallel to and separated from each other, the at least one second light emitting element being disposed on the base, the at least one first light emitting element and the at least one second light emitting element being respectively configured to transmit light into the two light guide plates from the two low beam sides of the two light guide plates.

5. The keyboard assembly according to claim 4, wherein the at least one first light-emitting element and the at least one second light-emitting element are respectively disposed on opposite sides of the base, the light emitted by the at least one second light-emitting element is transmitted toward the first light-emitting surface through the second filter pattern of one of the light-guiding assemblies and the first filter pattern of the other light-guiding assembly, and the light emitted by the at least one second light-emitting element is transmitted toward the second light-emitting surface through the first filter pattern of one of the light-guiding assemblies and the second filter pattern of the other light-guiding assembly.

6. The keyboard assembly of claim 4, wherein ratios of a total area of the first filter patterns of one of the light guide assemblies and a total area of the second filter patterns of the other of the light guide assemblies to a total area of the first light emitting surface are different from each other.

7. The keyboard assembly of claim 6, wherein the second filter pattern of one of the light guide assemblies and the first filter pattern of another of the light guide assemblies have different colors.

8. The keyboard assembly of claim 3, wherein the light guide assembly further comprises two first embossed structures, the two first embossed structures are located on the first outer surface of the light guide plate, and the first filter pattern and the second filter pattern are respectively formed on the two first embossed structures.

9. The keyboard assembly of claim 8, wherein the light guide assembly further comprises two second embossed structures, the two second embossed structures are located on the second outer surface of the light guide plate, and the two first embossed structures are optically coupled to the two second embossed structures, respectively.

10. The keyboard assembly of claim 1, further comprising a reflective film disposed on the base and located on a side of the light guide plate of the light guide assembly away from the first keycap and the second keycap.