TWM606487U - Illuminated keyboard - Google Patents

Abstract

An illuminated keyboard comprises a base plate, a plurality of key structures, and a backlight module. The base plate comprises a plurality of first openings. The key structures are disposed on the first openings of the base plate. The backlight module is disposed under the base plate and comprises a light guide plate, a first circuit film, an illuminating unit, and a reflective film. The light guide plate comprises a plurality of first through holes aligning to the first openings and a second through hole located between neighboring first through holes. The first circuit film is disposed on a lower surface of the light guide plate and covers the second through hole. The illuminating unit is located in the second through hole and electrically connected to the first circuit film. The reflective film is disposed on an upper surface of the light guide plate and covers the second through hole.

Description

Illuminated keyboard

This case is about a keyboard, especially a luminous keyboard.

With the increasing popularity of notebook computers, illuminated keyboards are gradually being used in notebook computers. In the illuminated keyboard on the notebook computer, the backlight module is usually designed with heat dissipation holes to improve the heat dissipation effect of the notebook computer. The larger the area and number of radiating holes, the greater the air intake and the better the heat dissipation effect. However, too many heat dissipation holes will hinder the light guide path and affect the brightness and uniformity of the keyboard light.

This case provides a luminous keyboard. The luminous keyboard includes a bottom plate, a plurality of key structures and a backlight module. Wherein, the bottom plate includes a plurality of first openings. The multiple key structures are arranged on the bottom plate and correspond to the first openings respectively. The backlight module is arranged under the bottom plate.

The backlight module includes a light guide plate, a first circuit film, a light-emitting unit and a light reflection film. Wherein, the light guide plate includes a plurality of first through holes and a second through hole. The first through holes are respectively aligned with the first openings. The second perforation is located between adjacent first perforations. The first circuit film is arranged on a lower surface of the light guide plate and covers the second perforation. The light emitting unit is arranged in the second through hole and is electrically connected to the first circuit film. The light reflection film is arranged on an upper surface of the light guide plate and covers the second perforation.

The light-emitting keyboard provided in this case is formed with a plurality of first openings on the bottom plate corresponding to the key structure, and a plurality of first holes are formed on the light guide plate to align with these first openings, and the light emitting unit is arranged on the light guide plate Within the second perforation. The light generated by the light-emitting unit can pass through the light guide plate and pass upward through the plurality of first through holes to improve the uniformity of light emission. In addition, these first openings and first through holes can be used as heat dissipation holes to meet the heat dissipation requirements of the electronic device.

The specific implementation of this case will be described in more detail below in conjunction with the schematic diagram. According to the following description and the scope of patent application, the advantages and features of this case will be clearer. It should be noted that the drawings are in a very simplified form and all use imprecise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of this case.

The first figure is a schematic cross-sectional view of an embodiment of the illuminated keyboard in this case. The figure shows the structure between the two adjacent keys of the illuminated keyboard for ease of description. As shown in the figure, the illuminated keyboard 100 includes a bottom plate 120, a plurality of key structures 140, a backlight module 160 and a frame 180.

Please also refer to the second figure, which is a schematic top view of an embodiment of the bottom plate in the first figure. As shown in the figure, the bottom plate 120 includes a plurality of first openings 122 (two first openings 122 are taken as an example in the figure) and a second opening 124. The second opening 124 is located between two adjacent first openings 122.

The key structure 140 is disposed on the bottom plate 120 and corresponds to the first opening 122 on the bottom plate 120. The position of the key structure 140 on the bottom plate 120 is aligned with the position of the first opening 122 on the bottom plate 120. A flexible circuit board (not shown) can be covered on the bottom plate 120 to receive the pressing signal generated by the button structure 140. In an embodiment, the bottom plate 120 may be a metal plate.

The backlight module 160 is disposed under the bottom plate 120. The frame 180 is disposed on the bottom plate 120 and includes a plurality of openings 182 to expose the plurality of key structures 140.

The backlight module 160 includes a light guide plate 162, a first circuit film 164, a light emitting unit 166, and a light reflection film 168. The light guide plate 162 includes a plurality of first perforations 1622 (two first perforations 1622 are taken as an example in the figure) and a second perforation 1624. The first through holes 1622 are respectively aligned with the first openings 122 on the bottom plate 120. The second through hole 1624 is located between the two first through holes 1622 and is aligned with the second hole 124 on the bottom plate 120.

The light guide plate has an upper surface 162a and a lower surface 162b. The first circuit film 164 is disposed on the lower surface 162 b of the light guide plate 162 and covers the second through hole 1624. The first circuit film 164 is electrically connected to the light-emitting unit 166 to supply power to the light-emitting unit 166. In an embodiment, the first circuit film 164 can be fixed to the lower surface of the light guide plate 162 by pasting. In an embodiment, the first circuit film 164 may be a flexible circuit board.

The first circuit film 164 includes a conductive pattern layer 1642 and a reflective layer 1644. The conductive pattern layer 1642 is located on the side of the first circuit film 164 facing the light guide plate 162 to electrically connect the light emitting unit 166. The light-reflecting layer 1644 is located on the side of the first circuit film 164 facing away from the light guide plate to provide a light reflection effect and prevent light from leaking downward to affect the light-emitting effect of the light-emitting keyboard. In an embodiment, the conductive pattern layer 1642 may be a silver paste coating. In one embodiment, the reflective layer 1644 may be a metal coating or a white coating.

The light reflection film 168 is disposed on the upper surface 162 a of the light guide plate 162 and covers the second perforation 1624. The light reflection film 168 can ensure the reflection efficiency of the light in the light guide plate 162 and prevent the light from leaking. In one embodiment, the light reflective film 168 can be fixed to the upper surface 162a of the light guide plate 162 by pasting. In one embodiment, the light reflective film 168 may include a light reflective layer 1682 and a light shielding layer 1684, and the light shielding layer 1684 is laminated on the light reflective layer 1682.

In other words, the light reflective layer 1682 is located on the side of the light reflective film 168 facing the light guide plate 162, and the light shielding layer 1684 is located on the side of the light reflective film 168 facing away from the light guide plate 162. In this way, an effective light reflection effect can be provided, and at the same time, the leakage of light can be avoided to affect the light-emitting effect of the light-emitting keyboard. In an embodiment, the light reflection layer 1682 may be a white coating, and the light shielding layer 1684 may be a black coating.

The light emitting unit 166 is disposed in the second through hole 1624 and is electrically connected to the first circuit film 164. In one embodiment, considering the thickness of the light guide plate 162 and the lighting range required by the light-emitting unit 166 in the light-emitting keyboard 100 of this application, the light-emitting unit 166 may be a micro LED or other small Solid state light source.

Taking the micro light emitting diode as an example, as shown in the figure, the light emitting unit 166 includes a light emitting diode chip 1662 and a transparent glue layer 1664. The light emitting diode chip 1662 is directly fixed to the first circuit film 164 and is electrically connected to the first circuit film 164 to obtain power. In one embodiment, the light-emitting diode chip 1662 can be fixed and electrically connected to the first circuit film 164 through surface mount technology (SMT) or chip on board (COB) technology.

The transparent adhesive layer 1664 is formed on the first circuit film 164 and covers the light-emitting diode chip 1662, which effectively isolates the light-emitting diode chip 1662 from the outside. In one embodiment, as shown in the figure, the overall height of the light emitting unit 166 is slightly larger than the thickness of the light guide plate 162. In this case, the transparent adhesive layer 1664 will protrude from the upper surface 162 a of the light guide plate 162. Correspondingly, the light reflective film 168 will form an upper convex portion 168a at the position corresponding to the second perforation 1624 to accommodate the protruding portion of the transparent adhesive layer 1664. The upper convex portion 168 a extends into the second opening 124 of the bottom plate 120. In this way, the transparent adhesive layer 1664 can be prevented from being squeezed by the bottom plate 120 to push the first circuit film 164 downward, so that the first circuit film 164 is separated from the light guide plate 162. In one embodiment, the size of the second opening 124 on the bottom plate 120 is slightly larger than the size of the second perforation 1624 of the light guide plate 162 to accommodate the convex portion 168 a of the light reflection film 168.

The light generated by the light emitting unit 166 is transmitted through the light guide plate 162 from the second perforation 1624 to the first perforation 1622 and then projected upward through the first opening 122 of the bottom plate 120.

In one embodiment, in order to improve the luminous efficiency of the backlight module 160, as shown in the figure, the lower surface 162b of the light guide plate 162 may include a plurality of surface microstructures 1626. These surface microstructures 1626 are located in each of the first through holes 1622. around. The surface microstructure 1626 can reflect and scatter the light in the light guide plate 162 so as to break the total reflection in the light guide plate 162 so that the light is emitted upward through the first opening 122 of the bottom plate 120.

In one embodiment, the surface microstructure 1626 may be a V-groove microstructure or a dot microstructure. In addition, in order to prevent the light projected upward from the light guide plate 162 from being directly projected to the user’s eyes and causing discomfort, in one embodiment, the range of the first opening 122 of the bottom plate 120 covers the projection range of the key cap of the key structure 140 The width of the first through hole 1622 of the light guide plate 162 is smaller than the width of the key cap of the key structure 140.

It is worth noting that the first figure shows the structure between the two adjacent keys of the illuminated keyboard in this case in order to illustrate the technical features of this case. In practical applications, the structure of the first figure can be applied to any area on the illuminated keyboard that needs to be backlit. In one embodiment, a structure as shown in the first figure of this case can be arranged between any two adjacent keys of the illuminated keyboard to provide uniform illumination.

The third figure is a schematic cross-sectional view of another embodiment of the illuminated keyboard of the present invention. As shown in the figure, the main difference between the light-emitting keyboard 200 of this embodiment and the light-emitting keyboard 100 of the first figure is that this embodiment controls the size of the light-emitting unit 266 so that the upper surface of the transparent adhesive layer 2664 is flush with the guide. The upper surface 162a of the light plate 162 may be located in the second through hole 1624 to prevent the transparent adhesive layer 2664 from protruding from the upper surface 162a of the light guide plate 162.

That is, different from the embodiment in the first figure, the transparent adhesive layer 1664 protrudes from the upper surface 162a of the light guide plate 162, and the transparent adhesive layer 2664 of this embodiment is completely located in the second perforation 1624. Since the transparent adhesive layer 2664 is completely located in the second perforation 1624, the light reflection film 268 covering the light guide plate 162 and the second perforation 1624 will have a flat appearance. In addition, the bottom plate 220 of this embodiment does not need to form a second opening 124 to accommodate the protruding portion of the light reflection film 168 as in the embodiment of the first figure. The other parts of the illuminated keyboard 200 in this embodiment are the same as the illuminated keyboard 100 in the first figure, and will not be repeated here.

The light-emitting keyboard 100, 200 provided in this case is formed with a plurality of first openings 122 on the bottom plate 120, 220 corresponding to the key structure 140, and a plurality of first holes 1622 are formed on the light guide plate 162 to align with these first openings. The hole 122 and the light-emitting diode chip 1662 are disposed in the second through hole 1624 of the light guide plate 162. The light generated by the light emitting diode chip 1662 can pass through the light guide plate 162 and pass upward through the plurality of first through holes 1622 to improve the uniformity of light emission. In addition, these first openings 122 and first through holes 1622 can be used as heat dissipation holes to meet the heat dissipation requirements of the electronic device.

The above are only preferred embodiments of this case and do not impose any limitation on this case. Any person skilled in the technical field who makes any form of equivalent substitution or modification to the technical means and technical content disclosed in this case within the scope of the technical means of this case is not deviated from the technical means of this case. It still falls within the scope of protection of this case.

100, 200: illuminated keyboard 120, 220: bottom plate 140: Button structure 160: backlight module 180: frame 122: first opening 124: second opening 162: light guide plate 164: The first circuit film 1642: conductive pattern layer 1644: reflective layer 166, 266: light-emitting unit 168, 268: light reflective film 1622: first perforation 1624: second piercing 162a: upper surface 162b: lower surface 1682: light reflection layer 1684: light shielding layer 1662: LED chip 1664, 2664: transparent glue layer 168a: convex part 1626: Surface microstructure 182: open

The first figure is a schematic cross-sectional view of an embodiment of the illuminated keyboard in this case; The second figure is a schematic top view of an embodiment of the bottom plate in the first figure; and The third figure is a schematic cross-sectional view of another embodiment of the illuminated keyboard of the present invention.

100: illuminated keyboard

120: bottom plate

140: Button structure

160: backlight module

180: frame

122: first opening

124: second opening

162: light guide plate

164: The first circuit film

1642: conductive pattern layer

1644: reflective layer

166: light-emitting unit

168: light reflective film

1622: first perforation

1624: second piercing

162a: upper surface

162b: lower surface

1682: light reflection layer

1684: light shielding layer

1662: LED chip

1664: transparent glue layer

168a: convex part

1626: Surface microstructure

182: open

Claims (11)

A luminous keyboard, including: A bottom plate including a plurality of first openings; A plurality of button structures are arranged on the bottom plate and correspond to the first openings respectively; A backlight module is arranged under the bottom plate, and the backlight module includes: A light guide plate comprising a plurality of first perforations and a second perforation, the first perforations are respectively aligned with the first openings, and the second perforation is located between the adjacent first perforations; A first circuit film disposed on a lower surface of the light guide plate and covering the second perforation; A light-emitting unit disposed in the second through hole and electrically connected to the first circuit film; and A light reflection film is arranged on an upper surface of the light guide plate and covers the second perforation. The illuminated keyboard according to claim 1, wherein the lower surface of the light guide plate includes a plurality of surface microstructures and is located around the first perforations. The light-emitting keyboard according to claim 1, wherein the light-emitting unit is a micro LED. The luminous keyboard according to claim 1, wherein the light reflective film includes a light reflective layer and a light shielding layer, and the light shielding layer is laminated on the light reflective layer. The light-emitting keyboard according to claim 1, wherein the first circuit film includes a light-reflecting layer, and the light-reflecting layer is located on a side of the first circuit film back to the light guide plate. The illuminated keyboard according to claim 1, further comprising a frame, which is arranged on the bottom plate and includes a plurality of openings to expose the key structures. The light-emitting keyboard according to claim 1, wherein the light-emitting unit comprises a light-emitting diode chip and a transparent glue layer, the light-emitting diode chip is electrically connected to the first circuit film, and the transparent glue layer is formed Covering the light emitting diode chip on the first circuit film. The luminous keyboard according to claim 7, wherein the transparent adhesive layer is completely located in the second perforation. The luminous keyboard according to claim 7, wherein the transparent adhesive layer protrudes from the upper surface of the light guide plate, and the light reflection film includes an upper convex portion corresponding to the second perforation to accommodate the transparent adhesive Floor. The illuminated keyboard according to claim 9, wherein the bottom plate further includes a second opening, and the second opening is located between two adjacent first openings to accommodate the upper convex portion. The illuminated keyboard according to claim 1, wherein the width of the first perforation is smaller than the width of the keycap of the key structure.

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