TW201824317A - Luminous keyboard and luminous keyswitch thereof - Google Patents

Abstract

A luminous keyboard includes a substrate, a light source circuit layer under the substrate, a plurality of keycaps over the substrate, a plurality of light-emitting elements, and a plurality of optical diffusers disposed apart from each other. Adjacent keycaps is spaced apart by a keycap gap. Each keycap is movable relative to the substrate and has a light-transparent region and a keycap projection space under the corresponding keycap. Each light-emitting element has a top light output surface. Adjacent optical diffusers have a diffusion gap. Each optical diffuser covers one of the light-emitting elements and extends right under the light-transparent region. Each optical diffuser has a top diffusion surface larger than the top light output surface in area. The top light output surface of the light-emitting element provides light energy to its corresponding optical diffuser and the light energy is diffused by the optical diffuser and emits out through the corresponding light-transparent region.

Description

 Illuminated keyboard and its illuminated button  

The present invention generally relates to an illuminated keyboard and its illuminated button. In particular, the present invention relates to an illuminated keyboard and its illuminated button that enhances uniformity of illumination and avoids the effects of light interaction between illuminated buttons.

The keyboard is a very important input device for electronic products (especially computers), and the development of the keyboard has a close relationship with the convenience of the user. In order to operate the keyboard smoothly in a dim environment, the illuminated keyboard has gradually become the first choice for consumers. However, when the button uses the upper-emitting light-emitting diode as the light source, since the light-emitting area is significantly smaller than the light-transmissive area of the key cap, the light-emitting uniformity of the character light-transmissive area is generally poor, which affects the visual effect.

Therefore, how to improve the uniformity of illumination of the illuminated button is one of the design priorities of the illuminated keyboard.

An object of the present invention is to provide an illuminated keyboard having an optical diffusion design to enhance the uniformity of illumination of the upper illumination type LED, thereby improving the brightness uniformity of the button characters.

Another object of the present invention is to provide an illuminated keyboard having an optical diffusion mechanism corresponding to each button to concentrate the light on the corresponding button, thereby avoiding the interaction of light energy between the buttons.

In one embodiment, the present invention provides an illuminated keyboard comprising a bottom plate, a light source circuit layer, a plurality of key caps, a plurality of light emitting elements, and a plurality of optical diffusing portions separated from each other. The bottom plate extends along a plane, and the plane is parallel to the X axis and the Y axis; the light source circuit layer is disposed under the bottom plate; the plurality of key caps are disposed above the bottom plate, the key caps have a light transmitting area, and the key caps are opposite to the bottom plate Moving in the Z-axis direction, each key cap is substantially vertically downwardly projected to have a keycap projection space, adjacent two keycaps are separated by a keycap gap, and the X-axis, the Y-axis, and the Z-axis are perpendicular to each other; the plurality of light-emitting elements are disposed on the light source The circuit layer is located in each of the keycap projection spaces, each of the light-emitting elements has an upper light-emitting surface, the upper light-emitting surface is substantially parallel to the plane, the upper light-emitting surface has a first area, and the adjacent two optical diffusing portions are separated by a diffusion gap. Each of the optical diffusing portions covers one of the plurality of light emitting elements, and each of the optical diffusing portions extends along the planar direction directly below the light transmitting region of each of the key caps, and each of the optical diffusing portions has a diffusion upper surface, and the diffusion upper surface has a second area, the second area being larger than the first area, wherein the upper light emitting surface of the plurality of light emitting elements provides light energy to the corresponding optical diffusing portion, and each of the optical diffusing portions diffuses the light energy from the first area The second area is further upwardly emitted from the light-transmitting region of the corresponding key cap; the plurality of optical diffusing portions are separated from each other, so that the light energy enters the corresponding optical diffusing portion, and needs to be transmitted through the diffusion gap to be transmitted to the phase. Adjacent optical diffuser.

In one embodiment, the plurality of optical diffusing portions are substantially distributed over a horizontal extent of each of the keycap projection spaces parallel to the bottom plate and do not exceed an adjacent keycap gap.

In one embodiment, the plurality of optical diffusers are a plurality of optical caps or a plurality of optical glue portions.

In one embodiment, the maximum thickness of each of the optical diffusing portions attached to the corresponding upper light emitting surface is greater than the thickness of the corresponding light emitting element in the normal direction of the upper light emitting surface.

In one embodiment, the illuminated keyboard further includes a plurality of spacers, wherein the plurality of spacers are respectively disposed in the gaps of the diffusion portions to prevent optical interference between adjacent keycap projection spaces.

In one embodiment, the illuminated keyboard further includes a connecting portion, wherein the connecting portion connects the plurality of optical diffusing portions to form the light guiding sheet, the light guiding sheet has a plurality of light extracting units disposed on the plurality of optical diffusing portions, and the connecting portion does not have any light extracting unit, The light energy is not emitted upward from the connecting portion.

In one embodiment, each of the optical diffusing portions includes a light guiding portion and a peripheral light guiding region, and the light guiding portion of the light emitting element is located directly above the upper light emitting surface and the peripheral light guiding region is adjacent to the light guiding portion and the connecting portion of the light emitting element, and The density of the light extraction unit of the light guiding region of the light emitting element is smaller than the density of the light extraction unit of the peripheral light guiding region.

In one embodiment, the illuminated keyboard further includes a mask layer, wherein the mask layer is disposed above the plurality of optical diffusers to partially block the light energy.

In an embodiment, the illuminated keyboard further includes a spacer layer, wherein the spacer layer is disposed between the mask layer and the light source circuit layer, the spacer layer has a plurality of spacer openings to respectively correspond to the plurality of key caps, and each of the spacer layers is configured to be received A light-emitting element and an optical diffusing portion corresponding to the same key cap.

In one embodiment, the spacer layer is a double-sided adhesive layer.

In one embodiment, the illuminated keyboard further includes a plurality of elastic members, wherein the plurality of elastic members are disposed on the bottom plate and respectively located in the respective keycap projection spaces, and each of the light emitting elements is located directly under the corresponding elastic member.

In another embodiment, the present invention provides an illuminated keyboard comprising a bottom plate, a light source circuit layer, a first keycap, a second keycap, a first light emitting element, a second light emitting element, a first optical diffusing portion, and a second optical Diffusion department. The bottom plate extends along a plane parallel to the X axis and the Y axis; the light source circuit layer is disposed under the bottom plate; the first key cap is disposed above the bottom plate, the first key cap has a first light transmitting area, and the first key cap can be Moving relative to the bottom plate along the Z-axis direction, the first keycap is substantially vertically downwardly projected to have a first keycap projection space, and the X-axis, the Y-axis, and the Z-axis are perpendicular to each other; the second keycap is disposed above the bottom plate, and the second The key cap has a second light transmissive area, the second key cap is movable relative to the bottom plate along the Z axis direction, and the second key cap is substantially vertically downwardly projected to have a second key cap projection space, the first key cap and the second key The first light-emitting element is disposed on the light source circuit layer and is located in the first keycap projection space, the first light-emitting element has a first upper light-emitting surface, the first upper light-emitting surface has a first area, and the second light-emitting surface The component is disposed on the light source circuit layer and is located in the second keycap projection space, the second light emitting component has a second upper light emitting surface, and the second upper light emitting surface has a third area; the first optical diffusing portion covers the first light emitting component, An optical diffuser along the flat The direction extends directly below the first light transmitting region, the first optical diffusing portion has a first diffusing upper surface, the first diffusing upper surface has a second area, the second area is larger than the first area, and the second optical diffusing portion covers the first a second light emitting element, the second optical diffusing portion extends along the planar direction directly below the second light transmitting region, the second optical diffusing portion has a second diffusing upper surface, and the second diffusing upper surface has a fourth area, a fourth area Greater than the third area; wherein the first optical diffusing portion and the second optical diffusing portion are separated from each other with a diffusion gap therebetween; wherein the first light emitting element provides light energy to the first optical diffusing portion, and the first optical diffusing portion makes the light Dispersing from the first area to the second area, and then upward from the first light-transmitting area corresponding to the upper side; wherein the second light-emitting element provides light energy to the second optical diffusing portion, and the second optical diffusing portion makes the light It can be diffused from the third area to the fourth area, and then emitted upward from the second transparent area corresponding to the upper side; wherein the light energy provided by the first illuminating element enters the first optical diffusing portion, It needs to be attenuated by the diffusion gap before it can be transmitted to the adjacent second optical diffusion.

In another embodiment, the present invention provides an illuminated keyboard comprising a backplane, a light source circuit layer, a plurality of keycaps, a plurality of light emitting elements, an optically diffusing adhesive layer, and a mask layer. The bottom plate extends along a plane parallel to the X-axis and the Y-axis; the light source circuit layer is disposed under the bottom plate; the plurality of key caps are disposed above the bottom plate, the key caps have a light-transmitting area, and the key caps are opposite to the bottom plate Moving in the Z-axis direction, each key cap is substantially vertically downwardly projected to have a keycap projection space, adjacent two keycaps are separated by a keycap gap, and the X-axis, the Y-axis, and the Z-axis are perpendicular to each other; the plurality of light-emitting elements are disposed on the light source a circuit layer is located in each of the keycap projection spaces, each of the light emitting elements has an upper light emitting surface, the upper light emitting surface is substantially parallel to the plane; the optical diffusion adhesive layer is coated on the light source circuit layer and covers the plurality of light emitting elements, and the optical diffusion adhesive layer is along The plane direction extends directly below the light transmissive area of each of the keycaps; the mask layer is disposed above the optical diffusion adhesive layer, wherein the upper light emitting surface of the plurality of light emitting elements provides light energy to diffuse through the optical diffusion adhesive layer from directly above The light transmissive area of the corresponding key cap is emitted, and the mask layer partially blocks the light energy to prevent light energy from entering the keycap gap.

In another embodiment, the present invention provides a light emitting button comprising a bottom plate, a light source circuit layer, a key cap, a light emitting element, and an optical diffusing portion. The light source circuit layer is disposed under the bottom plate; the key cap is disposed above the bottom plate, the key cap has a light transmitting area, and the key cap is movable relative to the bottom plate, and the key cap is substantially vertically downwardly projected to have a key cap projection space; the light emitting component is disposed on the light source The circuit layer is located in the keycap projection space; the optical diffusion portion covers the light-emitting element and is substantially distributed over a horizontal range of the keycap projection space parallel to the bottom plate, wherein the light-emitting element provides light energy to the optical diffusion portion, and the optical diffusion portion The refraction and reflection cause the light energy to diffuse into the keycap projection space to be emitted from the light transmission area of the keycap.

In one embodiment, the light-emitting element has an upper light-emitting surface, and the maximum thickness of the optical diffuser attached to the upper light-emitting surface is greater than the thickness of the light-emitting element in the normal direction of the upper light-emitting surface.

In one embodiment, the optical diffusing portion is a light guiding sheet, the light guiding sheet includes a light guiding region, and the light guiding region is located in the keycap projection space and has a plurality of light extraction units, and the light guiding region includes a light guiding portion of the light emitting component and In the peripheral light guiding region, the light emitting element has an upper light emitting surface, the light guiding portion of the light emitting element is located directly above the upper light emitting surface, and the peripheral light guiding region is adjacent to the light guiding portion of the light emitting element, and the light extraction unit of the light guiding portion of the light emitting element has a density smaller than that of the periphery. The density of the light extraction unit of the light guiding zone.

1‧‧‧ illuminated keyboard

10‧‧‧Key Module

100, 100a, 100b‧‧‧ illuminated buttons

110a, 110b‧‧‧ key cap

116a, 116b‧‧‧Transparent zone

120‧‧‧floor

122a, 122b, 124a, 124b‧‧‧ link institutions

128a, 128b‧‧‧ light hole

130a, 130b‧‧‧ Lifting mechanism

132‧‧‧First bracket

134‧‧‧second bracket

140‧‧‧Switch circuit layer

142a, 142b, 144a, 144b‧‧‧ through holes

148a, 148b‧‧‧ switch unit

150‧‧‧Light source circuit layer

160a, 160b‧‧‧Response unit

170a, 170b‧‧‧Optical Diffusion Department

172a, 172b‧‧‧ diffused upper surface

180a, 180b‧‧‧Lighting elements

182a, 182b‧‧‧ shiny surface

200‧‧‧Frame

202‧‧‧Grid structure

204‧‧‧Frame opening

210‧‧‧Interval

220‧‧‧mask layer

30‧‧‧Lighting unit

300‧‧‧Light source circuit layer

310‧‧‧Lighting elements

320‧‧‧Optical Diffusion Department

330‧‧‧ spacer

332‧‧‧ interval opening

340‧‧‧mask layer

342‧‧‧Transmission Department

344‧‧‧Lighting Department

410‧‧‧Optical diffusion layer

510‧‧‧Light guide

512a, 512b‧‧‧ Optical Diffusion Department

514‧‧‧Connecting Department

516‧‧‧Light extraction unit

517‧‧‧Light-emitting area of light-emitting elements

518‧‧‧Peripheral light guide

G1‧‧‧Key Cap Clearance

G2‧‧‧Diffusion gap

S1, S2‧‧‧ keycap projection space

FIG. 1 is a schematic diagram of an illuminated keyboard according to an embodiment of the invention.

2A and 2B are respectively an exploded view and a cross-sectional view of an illuminated keyboard according to an embodiment of the present invention.

2C is a partial enlarged view of FIG. 2B.

3A and 3B are schematic cross-sectional views of a modified embodiment of Fig. 2A.

4A-4C are exploded views, a top view, and a cross-sectional view of a light emitting unit of an illuminated keyboard according to an embodiment of the invention.

5A and 5B are respectively an exploded view and a cross-sectional view of an illuminated keyboard according to another embodiment of the present invention.

6A and 6B are respectively an exploded view and a cross-sectional view of an illuminated keyboard according to an embodiment of the present invention.

6C is a partial enlarged view of FIG. 6B.

Figure 7 is a schematic cross-sectional view of a variation of Figure 6A.

The invention provides an illuminated keyboard and an illuminated button thereof, in particular to an illuminated keyboard and an illuminated button having an upper illumination type illumination element and an optical diffusion design for enhancing uniformity of illumination and avoiding the interaction of light energy between the illumination buttons. Specifically, the illuminating keyboard of the present invention can be any independent keyboard device with illuminating buttons or an illuminating keyboard integrated with an electronic product (such as a button or keyboard equipped with a mobile device, a tablet computer, etc.), but not limited thereto. Hereinafter, the computer keyboard is taken as an example, and the details of the illuminated keyboard and its illuminated button of the embodiment of the present invention are described in detail with reference to the drawings.

As shown in FIG. 1 , the illuminated keyboard 1 of the present invention includes a plurality of illuminated buttons 100 , wherein the plurality of illuminated buttons 100 can be integrated into the button module 10 to facilitate assembly and manufacture. Specifically, the circuit layer and the bottom plate of the plurality of light-emitting buttons 100 are preferably integrated into a single component. For example, the key switches of the plurality of light-emitting buttons 100 can be designed on the same circuit layer or share the same bottom plate to simplify the manufacture of the illuminated keyboard 1. And assembly. The illuminated keyboard 1 can further include a frame 200, wherein the frame 200 can have a grid structure 202 and a plurality of frame openings 204. The plurality of frame openings 204 are respectively corresponding to the plurality of light-emitting buttons 100 to define a plurality of light-emitting buttons 100 such that the key caps of the respective light-emitting buttons 100 are located in one of the plurality of frame openings 204. The grid structure 202 is located between adjacent frame openings 204 and separates adjacent illuminated buttons 100. Although the design of the illuminated keyboard is described by two adjacent illuminated buttons 100a, 100b, it is not limited thereto.

As shown in FIG. 2A and FIG. 2B, in an embodiment, the illuminated keyboard includes a bottom plate 120, a light source circuit layer 150, a plurality of keycaps (eg, a first keycap 110a and a second keycap 110b), and a plurality of light emitting elements (eg, first The light-emitting element 180a and the second light-emitting element 180b) and the plurality of optical diffusion portions (for example, the first optical diffusion portion 170a and the second optical diffusion portion 170b). Furthermore, the illuminated keyboard may further include a switch circuit layer 140, a plurality of lift mechanisms (eg, the first lift mechanism 130a and the second lift mechanism 130b), and a plurality of return units (eg, the first reply unit 160a and the second reply unit 160b).

Specifically, the bottom plate 120 is disposed below the keycaps 110a, 110b and extends along a plane that is parallel to the X-axis and the Y-axis. That is, the bottom plate 120 extends along the X Y plane. Furthermore, the bottom plate 120 has a plurality of light-transmissive holes 128a, 128b through which light energy for the light-emitting elements 180a, 180b is emitted from the corresponding light-transmitting regions 116a, 116b. Both ends of the lifting mechanism 130a, 130b are movably coupled to the keycaps 110a, 110b and the bottom plate 120, respectively, to support the movement of the keycaps 110a, 110b relative to the bottom plate 120. That is, the elevating mechanisms 130a, 130b can respectively support the keycaps 110a, 110b to move in the Z-axis direction with respect to the bottom plate 120, wherein the X-axis, the Y-axis, and the Z-axis are perpendicular to each other. The lifting mechanism 130a, 130b may be a scissor lifting mechanism that includes the first bracket 132 and the second bracket 134, but is not limited thereto. The bottom plate 120 has a coupling mechanism 122a, 124a, 122b, 124b (for example, a hook that is bent upward) to couple the lower ends of the lifting mechanisms 130a, 130b. Correspondingly, the key caps 110a, 110b have coupling mechanisms (such as shaft holes, chutes) to couple the upper ends of the lifting mechanisms 130a, 130b. In other words, the lifting mechanisms 130a, 130b are respectively disposed under the keycaps 110a, 110b, and the coupling mechanisms of the keycaps 110a, 110b are respectively rotatable and slidably coupled to the first bracket 132 and the second corresponding to the lifting mechanism 130a, 130b. The upper end of the bracket 134, and the connecting mechanisms 122a, 124a, 122b, and 124b of the bottom plate 120 are slidably and rotatably coupled to the lower ends of the first bracket 132 and the second bracket 134 of the corresponding lifting mechanisms 130a, 130b, respectively, to support the keys. The caps 110a, 110b move relative to the bottom plate 120.

The return units 160a, 160b respectively provide the restoring forces of the key caps 110a, 110b that are pressed back to the position before pressing. Depending on the design requirements, the return unit 160a, 160b can be implemented as a resilient element (such as a spring or elastomer) or a magnetic unit such that the keycaps 110a, 110b can be resiliently or magnetically restored to their pre-pressed position. In this embodiment, the return units 160a, 160b are described by elastic members (such as elastomers) and are disposed between the bottom plate 120 and the corresponding key caps 110a, 110b. In other embodiments (not shown), the reply unit can be implemented as a magnetic unit to return the keycap to the position before pressing by magnetic attraction or magnetic repulsion. For example, the elastic body may be replaced by a pair of polarity-repulsive magnetic components respectively disposed on the keycaps 110a, 110b and the bottom plate 120 to revert the keycaps 110a, 110b to the position before pressing by magnetic repulsion. In another embodiment (not shown), the elastic body can be replaced by a pair of polar-adsorbing magnetic components respectively disposed on the frame 200 and the key caps 110a, 110b to restore the keycap to the pressing state by magnetic attraction. s position. It should be noted that when the magnetic unit is used as the recovery unit to provide the restoring force, the position of the magnetic unit can be changed according to actual needs, and can be matched or integrated with other components of the button to provide a restoring force. The examples are shown as limits. It should be noted here that in FIG. 2B, the reply unit 160a, 160b is not illustrated for clarity of the description of the present invention.

The switch circuit layer 140 is disposed above the bottom plate 120, and the switch circuit layer 140 has a plurality of through holes 142a, 144a, 142b, 144b and a plurality of switch units 148a, 148b. The plurality of through holes 142a, 144a, 142b, and 144b are corresponding to the connecting mechanisms 122a, 124a, 122b, and 124b of the bottom plate 120 to allow the connecting mechanisms 122a, 124a, 122b, and 124b to pass through the corresponding through holes 142a, 144a, 142b, and 144b. The lower ends of the elevating mechanisms 130a, 130b are connected. The plurality of keycaps 110a, 110b are disposed above the switch circuit layer 140 and correspond to the plurality of switch units 148a, 148b, respectively. Each of the keycaps 110a, 110b is movable relative to the base plate 120 to trigger a corresponding switch unit 148a, 148b. Specifically, the switch circuit layer 140 is preferably a thin film switch circuit layer and has a first switch unit 148a and a second switch unit 148b adjacent to each other, wherein the switch units 148a, 148b are preferably implemented as a switch circuit. The first keycap 110a is disposed above the first switch unit 148a, and the first keycap 110a is movable relative to the bottom plate 120 by the support of the first lifting mechanism 130a, such that the first keycap 110a can trigger the first switch unit 148a. . The second keycap 110b is disposed above the second switch unit 148b, and the second keycap 110b is movable relative to the bottom plate 120 by the support of the second lifting mechanism 130b, such that the second keycap 110b can trigger the second switch unit 148b. .

Each of the keycaps 110a, 110b has a light transmitting area 116a, 116b, and each of the keycaps 110a, 110b is substantially vertically downwardly projected to have a keycap projection space S1, S2, and the adjacent two keycaps 110a, 110b are separated by a keycap gap. G1. Specifically, the first keycap 110a has a first light transmissive area 116a, and the first keycap 110a is substantially vertically projected to define a first keycap projection space S1. The second keycap 110b has a second light-transmissive area 116b, and the second keycap 110b is substantially vertically projected to define a second keycap projection space S2, wherein the keycap projection spaces S1, S2 are preferably respectively from the respective keycaps 110a, The outer edge of 110b projects the defined space vertically downward toward the bottom plate 120. The keycap gap G1 at which the first keycap 110a and the second keycap 110b are spaced apart refers to the distance between adjacent outer edges of the keycaps 110a, 110b.

The light source circuit layer 150 is disposed under the bottom plate 120. The light source circuit layer 150 is provided with a plurality of light emitting elements 180a and 180b. For example, the light source circuit layer 150 is preferably implemented as a thin film circuit layer, and has a light source circuit that can independently connect the light emitting elements 180a, 180b, and the light emitting elements 180a, 180b are preferably implemented as an upper light emitting light emitting diode, and Each of the light-emitting elements 180a, 180b can emit light energy of a single color or a different color. Furthermore, the illuminated keyboard further includes a control unit that can control the plurality of light-emitting elements 180a, 180b through the light source circuits connected to the respective light-emitting elements 180a, 180b. Therefore, the light-emitting elements 180a, 180b emit light energy of the same color or different colors or light energy of the same or different intensity to achieve a backlight effect of the overall illumination or partial illumination of the illuminated keyboard.

Each of the light-emitting elements 180a and 180b is preferably located in each of the keycap projection spaces S1 and S2, and each of the light-emitting elements 180a and 180b has upper light-emitting surfaces 182a and 182b. For example, the first light-emitting element 180a is disposed on the light source circuit layer 150 and electrically connected to the corresponding light source circuit, and is located in the first keycap projection space S1, and is preferably located directly below the elastic element as the first recovery unit 160a. . The first light emitting element 180a has a first upper light emitting surface 182a, and the first upper light emitting surface 182a has a first area. The second light-emitting element 180b is disposed on the light source circuit layer 150 and electrically connected to the corresponding light source circuit, and is located in the second keycap projection space S2, and is preferably located directly below the elastic element as the second recovery unit 160b. The second light emitting element 180b has a second upper light emitting surface 182b, and the second upper light emitting surface 182b has a third area. In this embodiment, the first upper light-emitting surface 182a and the second upper light-emitting surface 182b are substantially parallel to the XY plane, and preferably have substantially equal areas, that is, the first area is equal to the third area, but is not limited thereto. The first upper light-emitting surface 182a and the second upper light-emitting surface 182b may have different areas depending on the size of each button (for example, the size of the keycap).

The plurality of optical diffusing portions 170a and 170b are provided apart from each other, and the diffusing portion gap G2 is spaced between the adjacent optical diffusing portions 170a and 170b. Each of the optical diffusers 170a, 170b covers one of the plurality of light-emitting elements 180a, 180b. Each of the optical diffusing portions 170a and 170b extends in the XY plane direction directly below the light transmitting regions 116a and 116b of the corresponding keycaps 110a and 110b. That is, the projection of the light transmitting regions 116a, 116b in the XY plane preferably falls within the projection range of the corresponding optical diffusing portions 170a, 170b in the XY plane. Each of the optical diffusing portions 170a and 170b has diffusing upper surfaces 172a and 172b, and the diffusing upper surfaces 172a and 172b are larger than the upper light emitting surfaces 182a and 182b. Specifically, the first optical diffusing portion 170a covers the first light emitting element 180a, and the first optical diffusing portion 170a extends directly below the first light transmitting region 116a in the XY plane direction. The first optical diffusing portion 170a has a first diffusing upper surface 172a, the first diffusing upper surface 172a has a second area, and the area of the first diffusing upper surface 172a is larger than the area of the first upper emitting surface 182a, that is, the second area is larger than the second An area. The second optical diffusing portion 170b covers the second light emitting element 180b, and the second optical diffusing portion 170b extends right below the second light transmitting region 116b in the XY plane direction. The second optical diffusing portion 170b has a second diffusing upper surface 172b, the second diffusing upper surface 172b has a fourth area, and the second diffusing upper surface 172b has an area larger than the second upper emitting surface 182b, that is, the fourth area is larger than the second Three areas. It should be noted here that the "area" as used herein generally refers to the area of the projection area on the XY plane, that is, the area of the area where the upper light-emitting surfaces 182a, 182b or the optical diffusing portions 170a, 170b extend parallel to the XY plane.

In one embodiment, the plurality of optical diffusing portions 170a, 170b are substantially spread over the horizontal range of the corresponding keycap projection spaces S1, S2 parallel to the bottom plate 120 (ie, the range of the keycap projection spaces S1, S2 in the XY plane) and do not exceed the phase Adjacent keycap gap G1. In other words, the diffusing portion gap G2 is preferably substantially equal to or larger than the keycap gap G1, and the light energy can be uniformly diffused to the corresponding keycap projection spaces S1, S2, respectively, and the light in the adjacent keycap projection spaces S1, S2 is avoided. Can interact, but not limited to this. Specifically, the plurality of optical diffusing portions 170a, 170b are preferably substantially located in the corresponding keycap projection spaces S1, S2, and do not exclude portions that are slightly beyond the keycap projection spaces S1, S2 as long as they exceed the keycap projection spaces S1, S2. The optical diffusers 170a, 170b do not cause visually perceptible optical interference to adjacent keycap projection spaces S1, S2.

The upper light emitting surfaces 182a, 182b of the plurality of light emitting elements 180a, 180b provide light energy to the corresponding optical diffusing portions 170a, 170b, and each of the optical diffusing portions 170a, 170b diffuses the light energy from the first area to the second area. The light-transmitting holes 116a, 116b of the key caps 110a, 110b corresponding to the upper side are ejected upward through the light-transmissive holes 128a, 128b of the bottom plate. Specifically, the first light emitting element 180a provides light energy to the first optical diffusing portion 170a, and the first optical diffusing portion 170a diffuses light energy from the first area to the second area, and then upwards from the upper side. A light transmitting region 116a is emitted. The second light-emitting element 180b provides light energy to the second optical diffusing portion 170b, and the second optical diffusing portion 170b diffuses the light energy from the third area to the fourth area, and then upwards from the upper right corresponding second transparent area 116b. Shoot out. In other words, the optical diffusing portions 170a, 170b diffuse light from a relatively small area of the upper light emitting surfaces 182a, 182b to a relatively large area of the corresponding light transmitting regions 116a, 116b to enhance the light energy emitted from the light transmitting regions 116a, 116b. Uniformity. Further, since the plurality of optical diffusing portions 170a and 170b are separated from each other, light energy enters the corresponding optical diffusing portions 170a and 170b, and then needs to be attenuated by the diffusing portion gap G2 to be transmitted to the adjacent optical diffusing portions 170b and 170a. For example, after the light energy provided by the first light-emitting element 180a enters the first optical diffusion portion 170a, it needs to be attenuated by the diffusion portion gap G2 before being transmitted to the adjacent second optical diffusion portion 170b; or the light provided by the second light-emitting element 180b. After entering the second optical diffusion portion 170b, it is required to be attenuated by the diffusion portion gap G2 before being transmitted to the adjacent first optical diffusion portion 170a. Thereby, the possibility that the light energy emitted from the light-emitting element 180a can travel to the adjacent keycap projection space S2 can be reduced; conversely, the possibility that the light energy emitted by the light-emitting element 180b can travel to the adjacent keycap projection space S1 can also be reduced.

Specifically, the plurality of optical diffusing portions 170a and 170b may be implemented as separate optical adhesive portions or a plurality of optical caps, but are not limited thereto. For example, in an embodiment, after the light-emitting elements 180a, 180b are disposed on the light source circuit layer 150, the optical glue can be respectively covered on the light-emitting elements 180a, 180b by using a dispensing process as the corresponding optical diffusers 170a, 170b. . In another embodiment, according to the size of the area of the key cap projection spaces S1 and S2 parallel to the XY plane and the size of the light-emitting elements 180a and 180b, an optical cap of a corresponding size is prepared in advance by the optical material, and then the light-emitting elements 180a and 180b are formed. After being disposed in the light source circuit layer 150, the optical cap is attached to the corresponding light-emitting elements 180a, 180b as corresponding optical diffusers 170a, 170b. The optical diffusers 170a, 170b may be made of any suitable material that diffuses light energy by reflection or reflection. Further, when the optical diffusing portions 170a and 170b cover the light-emitting elements 180a and 180b, the bottom surfaces of the optical diffusing portions 170a and 170b are preferably closely attached to the upper light-emitting surfaces 182a and 182b and the side surfaces of the corresponding light-emitting elements 180a and 180b. In an embodiment, as shown in FIG. 2C, the optical diffusing portion 170a is exemplified, and the maximum thickness d1 of the optical diffusing portion 170a attached to the corresponding upper light emitting surface 182a is greater than the corresponding light emitting element 180a on the upper light emitting surface 182a. The thickness d2 in the line direction is to achieve a better diffusion effect. In other words, after the respective optical diffusing portions 170a, 170b cover the corresponding light emitting elements 180a, 180b, the maximum overlapping thickness of the optical diffusing portions 170a, 170b and the corresponding light emitting elements 180a, 180b is greater than or equal to that of the light emitting elements 180a, 180b. 2 times the thickness.

As shown in FIG. 3A, in an embodiment, the illuminated keyboard further includes a plurality of spacers 210, wherein the plurality of spacers 210 are disposed in the diffusion gap G2 to prevent optical between the adjacent plurality of keycap projection spaces S1 and S2. interference. For example, the plurality of spacers 210 may be formed of a light blocking material and disposed between the adjacent optical diffusion portions 170a, 170b to block light diffused by the light emitting element 180a through the optical diffusion portion 170a from entering the keycap projection space S2. Light that also blocks the light-emitting element 180b from diffusing through the optical diffusing portion 170b can enter the keycap projection space S1.

As shown in FIG. 3B, in an embodiment, the illuminated keyboard further includes a mask layer 220, wherein the mask layer 220 is disposed above the plurality of optical diffusing portions 170a, 170b to partially block the light energy. The mask layer 220 has a light blocking pattern to selectively block or allow light to pass therethrough. Specifically, the mask layer 220 is a light transmissive optical film and has a pattern on the film to shield a portion of the keyboard device that does not require light. For example, the mask layer 220 may have a rectangular ring pattern corresponding to the outer circumference of the plurality of button rectangles, such that a gap between adjacent buttons (eg, the keycap gap G1) is blocked by the mask to reduce the light leakage intensity of the portion, and corresponding to the plurality of buttons With the locations of the light transmissive regions 116a, 116b, the mask layer 220 remains transparent to allow light to pass therethrough so that light can be emitted from the light transmissive regions 116a, 116b of the keycaps 110a, 110b.

It should be noted that, in the foregoing embodiment, the plurality of spacers 210 may be independently disposed between the optical diffusers 170a, 170b, but not limited thereto. In other embodiments, the plurality of spacers 210 can be integrated into a single spacer layer to simplify assembly procedures and manufacturing costs. A light-emitting unit composed of a single spacer layer will be described later. As shown in FIG. 4A to FIG. 4C , the light emitting unit 30 includes a light source circuit layer 300 , a plurality of light emitting elements 310 , a plurality of optical diffusing portions 320 , a spacer layer 330 , and a mask layer 340 , wherein the plurality of light emitting elements 310 are disposed on the light source circuit layer 300 . The light source circuit 300 is electrically connected to the corresponding light source circuit 300. The plurality of optical diffusers 320 are disposed on the light source circuit layer 300, for example, by means of dispensing or adhesion, and the optical diffusing portions 320 are preferably attached to the corresponding plurality of light emitting elements 310. For example, reference may be made to the above description of the optical diffusing portions 170a, 170b of the embodiment of Fig. 2A. Similar to the mask layer 220 of the foregoing embodiment, the mask layer 340 may have a light shielding pattern corresponding to the plurality of button configurations (for example, the light transmitting portion 342 corresponds to the central light transmitting region of the key cap, and the light shielding portion 344 corresponds to the outer peripheral edge of the key cap rectangle), The gap between adjacent buttons is masked to prevent light from passing through, and the position corresponding to the transparent areas of the plurality of buttons allows light to pass. The spacer layer 330 is disposed between the mask layer 340 and the light source circuit layer 150, and the spacer layer 330 has a plurality of spacer openings 332 for respectively receiving the optical diffusion portion 320 and the light emitting element 310 corresponding to the same key cap.

Specifically, the spacer opening 332 is preferably larger than the transparent portion 342 of the mask layer 340, so that the light shielding portion 344 of the mask layer 340 can cover the outer edge of the optical diffusion portion 320 or the diffusion portion between the optical diffusion portions 320. The gap G2 blocks the upward traveling light energy that enters the gap of the diffusion portion by the optical diffusion portion 320. The size and shape of the transparent portion 342 of the mask layer 340 preferably correspond to the optical diffusing portion 320, so that the light emitted from the diffused upper surface of the optical diffusing portion 320 can enter the corresponding key cap projection space through the corresponding transparent portion 342. The light is emitted from the corresponding light-emitting area of the keycap. Furthermore, as shown in FIG. 4C, the size of the transparent portion 342 of the mask layer 340 may be slightly smaller than that of the optical diffusion portion 320, so that the light shielding portion 344 covers the outer edge of the optical diffusion portion 320 to prevent the optical diffusion portion 320 from being disposed. The light emitted by the diffused upper surface enters the corresponding keycap projection space. The spacer layer 330 is preferably a double-sided adhesive layer, especially a dark double-sided adhesive layer, thereby effectively absorbing the horizontal traveling light energy after the diffusion of the optical diffusion portion 320, and bonding the mask layer 340 and the light source circuit layer 150. To simplify the assembly process of the light emitting unit 30. When the light unit 30 and the button unit are combined into the button module 10, the light unit 30 can be fixed under the bottom plate 120 by adhesion, snapping, locking or the like. By extending the body structure of the spacer layer 330 into the diffusion gap G2, the light energy diffused by the optical diffusion portion 320 can be restricted from traveling only in the corresponding spacer layer opening 322, and cannot travel under the adjacent keycap.

It should be noted that after the spacer layer 330 is disposed on the light source circuit layer 150, the range of the optical diffusion portion 320 is defined by the spacer layer opening 322, and the plurality of optical diffusion portions 320 can be conveniently formed in an appropriate manner without additional assistance. Location, but not limited to this.

Furthermore, in conjunction with the application of the mask layer 220, the separate plurality of optical diffusers 170a, 170b can be integrated into a single optically diffused adhesive layer to prevent optical interaction of adjacent keys in a simplified manufacturing process. In an embodiment, as shown in FIG. 5A and FIG. 5B, the illuminated keyboard includes a bottom plate 120, a light source circuit layer 150, a plurality of keycaps 110a and 110b, a plurality of light-emitting elements 180a and 180b, an optical diffusion adhesive layer 410, and a mask layer 220. The bottom plate 120, the light source circuit layer 150, the plurality of keycaps 110a, 110b, the plurality of light-emitting elements 180a, 180b, and the mask layer 220 have structural details and functional relationships similar to those of the above-described embodiments of FIGS. 2A and 3B, and details are not described herein. . In the present embodiment, the optical diffusion adhesive layer 410 is coated on the light source circuit layer 150 and covers the plurality of light emitting elements 180a, 180b. The optical diffusion adhesive layer 410 extends in the XY plane direction directly below the light transmitting regions 116a, 116b of the respective keycaps 110a, 110b. The mask layer 220 is disposed above the optical diffusion adhesive layer 410. The upper light-emitting surfaces 182a, 182b of the plurality of light-emitting elements 180a, 180b provide light energy to transmit light from the upper right corresponding key caps 110a, 110b through the diffusion of the optical diffusion adhesive layer 410. The regions 116a, 116b are ejected, and the mask layer 220 partially blocks light energy to prevent light from entering the keycap gap G1.

Specifically, after the light-emitting elements 180a, 180b are disposed on the light source circuit layer 150, the optical glue may be entirely coated on the light source circuit layer 150 and cover the light-emitting elements 180a, 180b using a glue application process, so that the optical diffusion adhesive layer 410 A portion corresponding to each of the light-emitting elements 180a and 180b serves as a corresponding optical diffusion portion to simplify the manufacturing process. The mask layer 220 is disposed above the optical diffusion adhesive layer 410 to partially block the light energy. The mask layer 220 has a light shielding pattern to selectively block or allow light to pass through, so that the light emitted by the optical diffusion adhesive layer 410 corresponding to the portion of the key gap G1 can be blocked by the mask to reduce the light leakage intensity of the portion; The position of the light transmitting regions 116a, 116b, the mask layer 220 remains transparent to allow light to pass through, so that light can be emitted from the light transmitting regions 116a, 116b of the keycaps 110a, 110b to limit the light energy only in the corresponding key cap The projection spaces S1, S2 travel, thereby avoiding optical interference between adjacent buttons.

Further, the optical diffusion portion is not limited to the above-described optical glue portion or optical cap, and in other embodiments, a light guide sheet having a specific light extraction unit may be used to provide optical diffusion. In another embodiment, as shown in FIGS. 6A and 6B, the light guide sheet 510 includes a plurality of optical diffusing portions 512a, 512b (ie, a light guiding region) and a connecting portion 514. In other words, the plurality of optical diffusing portions 512a and 512b can be connected to each other to form the light guiding sheet 510 by the connecting portion 514. The light guide sheet 510 has a plurality of light extraction units 516 (see a partial enlarged view of FIG. 6C) disposed on the plurality of optical diffusion portions 512a, 512b, and the connection portion 514 is not provided with any light extraction unit, so that the light energy does not rise from the connection portion 514. Shoot out. Specifically, the light extraction unit 516 is disposed in a region corresponding to each of the keycap projection spaces S1 and S2 of the light guide sheet 510, so that the region of the light guide sheet 510 corresponding to each of the keycap projection spaces S1 and S2 is used as the optical diffusion portion 512a. Further, 512b allows the light energy of the upper light-emitting surfaces 182a and 182b of the light-emitting elements 180a and 180b to be diffused from a small area to a large area and then emitted from the light-transmitting areas 116a and 116b of the corresponding keycaps 110a and 110b. The light guide sheet 510 does not have any light extraction unit in the region corresponding to each of the key cap gaps G1 as the connection portion 514, so that the light energy of the upper light emitting surfaces 182a, 182b of the light emitting elements 180a, 180b can be prevented from the connection portion 514. The light is emitted, thereby reducing the light energy entering the key gap G1, thereby effectively avoiding optical interference between adjacent keys.

As shown in a partially enlarged view of FIG. 6C, the light extraction unit 516 can be a three-dimensional dot structure (for example, a convex circular microlens), and the direction of the light energy can be effectively controlled by diffraction, but not limited thereto. Light extraction unit 516 can have a variety of shapes and sizes depending on the application, such as from 1.0 micron to 200 microns. In one embodiment, the light extraction unit 516 is preferably embossed on the surface of the light guide sheet during the manufacturing process of the light guide sheet 510. The material of the light guide sheet 510 may be, for example, polycarbonate, polyethylene terephthalate (PET) or other suitable materials. The light energy supplied from the light-emitting elements 180a, 180b is diffused into the corresponding keycap projection spaces S1, S2 via the optical diffusing portions 512a, 512b, and the light is more uniform through the atomizing effect of the elastic body returning units 160a, 160b, for example. In one embodiment, as shown in FIG. 6C, taking the optical diffusion portion 512a as an example, the optical diffusion portion 512a includes a light-emitting element light guiding region 517 and a peripheral light guiding region 518. The light-emitting element light guiding region 517 is located directly above the upper light-emitting surface 182a of the corresponding light-emitting element 180a, and the peripheral light-guiding region 518 is adjacent to the light-emitting element light guiding region 517 and the connecting portion 514. The light extraction unit 516 of the light-emitting element light-guiding region 517 has a density lower than that of the light extraction unit 516 of the peripheral light-guiding region 518, whereby the light energy emitted by the upper light-emitting surface 182a can be more uniformly passed through the optical diffusion portion 512a. Corresponding to the light-transmitting regions 116a, 116b. Specifically, the light extraction unit 516 of the light guide sheet 510 at the optical diffusion portions 512a, 512b can be designed to be closer to the upper light emitting surface 182a, 182b. Since the light energy is strong, the density of the light extraction unit 516 can be small. The light refraction angle is smaller and more concentrated, and the farther away from the regions of the upper light-emitting surfaces 182a, 182b, the light extraction unit 516 may have a greater density to make the light refraction angle larger because the light energy is relatively weak. Thereby, the light energy provided by the light-emitting elements 180a, 180b can be made to spread more uniformly.

Furthermore, as shown in a partially enlarged view of FIG. 7, the embodiment of FIG. 6B can also be used in conjunction with the application of the mask layer 220 to further prevent interactive optical interference between the buttons. For example, the light shielding portion of the mask layer 220 may cover the outer edge of the optical diffusion portions 512a, 512b or the diffusion portion gap G2 between the optical diffusion portions 512a, 512b to block the optical diffusion portions 512a, 512b from entering the diffusion portion gap G2. The upward travel of light energy. The size and shape of the transparent portion of the mask layer 220 preferably correspond to the optical diffusing portions 512a, 512b, so that the light emitted from the diffused upper surface of the optical diffusing portions 512a, 512b can enter the corresponding key cap projection space through the corresponding light transmitting portion. And then emitted from the light-transmitting regions 116a, 116b of the corresponding keycaps.

Compared with the prior art, the illuminated keyboard of the present invention enhances the uniformity of illumination of the upper-emitting light-emitting diode by the optical diffusion portion, thereby improving the brightness uniformity of the button characters. Furthermore, the illuminated keyboard of the present invention has an optical diffusion mechanism corresponding to each button, so that the light is concentrated on the corresponding button, thereby avoiding the interaction of the light energy between the buttons.

The present invention has been described by the above embodiments, but the above embodiments are for illustrative purposes only and are not intended to be limiting. It will be apparent to those skilled in the art that the embodiments specifically described herein may have other modifications of the embodiments. Accordingly, the scope of the invention is intended to cover such modifications and are only limited by the scope of the appended claims.

Claims (17)

 An illuminated keyboard comprises: a bottom plate extending along a plane parallel to an X-axis and a Y-axis; a light source circuit layer disposed under the bottom plate; a plurality of key caps disposed above the bottom plate, each of the The key cap has a light transmitting area, and each of the key caps is movable along a Z-axis direction with respect to the bottom plate, and each of the key caps is substantially vertically downwardly projected to have a keycap projection space, and the adjacent two key caps are spaced apart. a keyhole gap, the X-axis, the Y-axis and the Z-axis are perpendicular to each other; a plurality of light-emitting elements are disposed on the light source circuit layer and located in each of the keycap projection spaces, each of the light-emitting elements having an upper light-emitting surface The upper illuminating surface is substantially parallel to the plane, the upper illuminating mask has a first area; and a plurality of optical diffusing portions are separated from each other, and a gap between the two adjacent optical diffusing portions is separated by a diffusing portion, and each optical diffusing portion Covering one of the plurality of light-emitting elements, each of the optical diffusing portions extends along the plane direction directly below the light-transmitting region of each of the keycaps, each of the optical diffusing portions having a diffusion upper surface, the diffusion upper surface Have one a second area, the second area is larger than the first area, wherein an upper light emitting surface of the plurality of light emitting elements provides light energy to the corresponding optical diffusing portion, and each of the optical diffusing portions diffuses the light energy from the first area Going to the second area, and then ejecting the light-transmitting area of the key cap corresponding to the upper right side; wherein the plurality of optical diffusing parts are separated from each other, so that the light energy enters the corresponding optical diffusing part, and the The diffusion gap attenuation can be transmitted to the adjacent optical diffusion.    The illuminated keyboard of claim 1, wherein the plurality of optical diffusing portions are substantially distributed over a horizontal extent of each of the keycap projection spaces parallel to the bottom plate and not exceeding an adjacent keycap gap.    The illuminated keyboard of claim 2, wherein the plurality of optical diffusing portions are a plurality of optical caps or a plurality of optical adhesive portions.    The illuminating keyboard according to any one of claims 1 to 3, wherein a maximum thickness of each of the optical diffusing portions attached to the corresponding upper light emitting surface is greater than a corresponding normal direction of the light emitting element in the upper light emitting surface. thickness.    The illuminated keyboard of claim 1, further comprising a plurality of spacers, wherein the plurality of spacers are respectively disposed in each of the diffusion gaps to prevent optical interference between adjacent keycap projection spaces.    The illuminating keyboard of claim 1, further comprising a connecting portion, wherein the connecting portion is connected to the plurality of optical diffusing portions to form a light guiding sheet, wherein the light guiding sheet has a plurality of optical extracting units disposed on the plurality of optical diffusing portions The connection portion does not have any light extraction unit so that the light energy does not exit upward from the connection portion.    The illuminating keyboard of claim 6, wherein each of the optical diffusing portions comprises a light-emitting element light guiding area and a peripheral light guiding area, wherein the light-emitting element light guiding area is located directly above the upper light-emitting surface and the peripheral light-guiding area Adjacent to the light guiding region of the light emitting element and the connecting portion, and the density of the light extracting unit of the light guiding region of the light emitting element is smaller than the density of the light extracting unit of the peripheral light guiding region.    The illuminating keyboard of claim 1, further comprising a mask layer, wherein the mask layer is disposed above the plurality of optical diffusing portions to partially block the light energy.    The illuminating keyboard of claim 8, further comprising a spacer layer, wherein the spacer layer is disposed between the mask layer and the light source circuit layer, the spacer layer having a plurality of spacer openings to respectively correspond to the plurality of key caps, And each of the spacer openings is configured to receive the light-emitting element and the optical diffusion portion corresponding to the same key cap.    The illuminated keyboard of claim 9, wherein the spacer layer is a double-sided adhesive layer.    The illuminating keyboard of claim 1, further comprising a plurality of elastic members, wherein the plurality of elastic members are disposed on the bottom plate and respectively located in each of the keycap projection spaces, and each of the illuminating elements is located at a corresponding one of the corresponding elastic members Below.    An illuminated button comprises: a bottom plate; a light source circuit layer disposed under the bottom plate; a key cap disposed above the bottom plate, the key cap having a light transmissive area, and the key cap is movable relative to the bottom plate The keycap is substantially vertically downwardly projected to have a keycap projection space; a light emitting element is disposed on the light source circuit layer and located in the keycap projection space; and an optical diffusing portion covers the light emitting element and is substantially distributed The keycap projection space is parallel to a horizontal extent of the bottom plate, wherein the light emitting component provides light energy to the optical diffusing portion, and the optical diffusing portion diffuses the light energy into the keycap projection space by refraction and reflection, The light transmissive area of the keycap is ejected.    The illuminating button of claim 12, wherein the illuminating element has an upper illuminating surface, and the maximum thickness of the optical diffusing portion attached to the upper illuminating surface is greater than a normal direction of the illuminating element on the upper illuminating surface. thickness.    The illuminating button of claim 12, wherein the optical diffusing portion is a light guiding sheet, the light guiding sheet comprises a light guiding region, wherein the light guiding region is located in the keycap projection space and has a plurality of light extraction units The light guiding region includes a light guiding portion and a peripheral light guiding region, the light emitting element has an upper light emitting surface, the light guiding portion of the light emitting element is directly above the upper light emitting surface, and the peripheral light guiding region is adjacent to The light guiding portion of the light emitting element has a density of the light extracting unit of the light guiding portion of the light emitting element being smaller than a density of the light extracting unit of the peripheral light guiding region.    The illuminating button of claim 12, further comprising a mask layer, wherein the mask layer is disposed above the optical diffusing portion to partially block the light energy.    An illuminated keyboard comprises: a bottom plate extending along a plane parallel to an X-axis and a Y-axis; a light source circuit layer disposed under the bottom plate; a first key cap disposed above the bottom plate The first keycap has a first light transmissive area, and the first keycap is movable along a Z-axis direction relative to the bottom plate, and the first keycap is substantially vertically downwardly projected to have a first keycap projection space. The X-axis, the Y-axis and the Z-axis are perpendicular to each other; a second keycap is disposed above the bottom plate, the second keycap has a second light-transmissive region, and the second keycap is opposite to the bottom plate Moving along the Z-axis direction, the second keycap is substantially vertically downwardly projected to have a second keycap projection space, the first keycap and the second keycap being separated by a keycap gap; a first light-emitting An element disposed on the light source circuit layer and located in the first keycap projection space, the first light emitting element has a first upper light emitting surface, the first upper light emitting mask has a first area; and a second light emitting element, Provided in the light source circuit layer and located in the second keycap projection space, the first The second illuminating element has a second upper illuminating surface, the second upper illuminating surface has a third area; a first optical diffusing portion, the first optical diffusing portion covers the first illuminating element, and the first optical diffusing portion Extending along the plane direction directly below the first light-transmissive region, the first optical diffusing portion has a first diffusion upper surface, the first diffusion upper surface having a second area, the second area being larger than the first An area of the second optical diffusing portion covering the second light emitting element, the second optical diffusing portion extending along the plane direction directly below the second light transmitting area, the first The second optical diffusing portion has a second diffusing upper surface, the second diffusing upper surface having a fourth area, the fourth area being larger than the third area; wherein the first optical diffusing portion and the second optical diffusing portion are separated from each other And spacing a diffusion portion gap; wherein the first light emitting element provides light energy to the first optical diffusion portion, and the first optical diffusion portion diffuses the light energy from the first area size to the second area size, Again The first light-transmitting region corresponding to the upper side is emitted; wherein the second light-emitting element provides light energy to the second optical diffusing portion, and the second optical diffusing portion diffuses the light energy from the third area to The fourth area is further upwardly emitted from the second light-transmissive area corresponding to the upper side; wherein the light provided by the first light-emitting element enters the first optical diffusing portion, and then needs to pass through the diffused portion gap to be transmitted. Adjacent to the second optical diffusing portion.    An illuminated keyboard comprises: a bottom plate extending along a plane parallel to an X-axis and a Y-axis; a light source circuit layer disposed under the bottom plate; a plurality of key caps disposed above the bottom plate, each of the The key cap has a light transmitting area, and each of the key caps is movable along a Z-axis direction with respect to the bottom plate, and each of the key caps is substantially vertically downwardly projected to have a keycap projection space, and the adjacent two key caps are spaced apart. a keyhole gap, the X-axis, the Y-axis and the Z-axis are perpendicular to each other; a plurality of light-emitting elements are disposed on the light source circuit layer and located in each of the keycap projection spaces, each of the light-emitting elements having an upper light-emitting surface The upper light emitting surface is substantially parallel to the plane; an optical diffusion adhesive layer is coated on the light source circuit layer and covers the plurality of light emitting elements, and the optical diffusion adhesive layer extends along the plane direction to the light transmitting area of each of the key caps Directly below; and a mask layer disposed above the optically diffusing adhesive layer, wherein an upper light emitting surface of the plurality of light emitting elements provides light energy to diffuse through the optical diffusing adhesive layer from the upper right corresponding to the key cap The light transmission area is emitted, And the mask layer partially blocks the light energy to prevent the light energy from entering the keycap gap.