TW201816823A - Luminous keyboard - Google Patents

Abstract

A luminous keyboard includes a substrate, a light source circuit layer, a switch circuit layer having switch units, keycaps respectively corresponding to the switch units, each keycap having a light-transparent region and a keycap projection space, adjacent keycaps spaced apart by a keycap interval, light-emitting units respectively disposed within the keycap projection spaces, and light guide sheets respectively and separately disposed within the keycap projection spaces, wherein each light guide sheet has a light input surface and an upper light output surface; adjacent light guide sheets are spaced apart by a light guide gap; the light guide gap extends under the keycap interval; the light-emitting units respectively correspond to the light guide sheets to provide light energy to the light input surface of the corresponding light guide sheet; each light guide sheet guides the light energy to its upper light output surface to emit out of the light-transparent region of the corresponding keycap.

Description

 Illuminated keyboard  

The present invention relates generally to an illuminated keyboard, and more particularly to an illuminated keyboard that avoids the interactive effects of light energy 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. Conventional illuminated keyboards typically direct light from a single or several light sources to all of the keys of the keyboard by means of a single light guide plate of corresponding keyboard size, thereby causing the keys to illuminate. However, the light between the keys of such an illuminated keyboard is easily interfered with each other, and there is no independent control for the illumination of each button.

Therefore, how to reduce the light interference between the keys of the illuminated keyboard and to improve the independent control of the light of each button is one of the design priorities of the illuminated keyboard.

An object of the present invention is to provide an illuminating keyboard having a illuminating mechanism corresponding to each button to enhance independent control of the illuminating of each button, thereby achieving overall or partial illuminating of the illuminating keyboard according to user control.

Another object of the present invention is to provide an illuminating keyboard having a light guiding 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, and the plurality of buttons in the keyboard can be issued. The function of light.

In one embodiment, the present invention provides an illuminated keyboard comprising a bottom plate, a light source circuit layer, a switch circuit layer, a plurality of key caps, a plurality of light emitting elements, and a plurality of light guide sheets. The light source circuit layer is disposed under the bottom plate; the switch circuit layer is disposed above the bottom plate, the switch circuit layer has a plurality of switch units; the plurality of key caps are disposed above the switch circuit layer and respectively correspond to the plurality of switch units, and each of the key caps has a light transmitting area, and each The key cap is movable relative to the bottom plate to trigger the corresponding switch unit, the key caps are substantially vertically downwardly projected to have a key cap projection space, and the adjacent two key caps are separated by a keycap gap; the plurality of light emitting elements are disposed on the light source circuit layer and The plurality of light guide sheets are disposed between the light source circuit layer and the plurality of key caps, and are located in the projection space of each key cap, and the plurality of light guide sheets are not beyond the plurality of key cap projection spaces. Each of the light guide sheets has a light incident surface and an upper light exit surface, and two adjacent plurality of light guide sheets are spaced apart from each other by a light guide plate gap, and the light guide plate gap extends at least below the key cap gap, wherein the plurality of light emitting elements respectively correspond to the plurality of light guide sheets, Providing light energy to the corresponding light guide surface of the light guide sheet, and each light guide sheet guiding light can emit light from each of the upper light exit surfaces to emit light from the corresponding key cap .

In one embodiment, the illuminated keyboard further includes a plurality of lifting mechanisms, wherein the lower end of each lifting mechanism is connected to the bottom plate, and the upper end of each lifting mechanism is connected to one of the plurality of key caps to support the movement of the corresponding key cap relative to the bottom plate. Each of the key caps has a central point of the keycap, and each of the light guide sheets is disposed above the bottom plate and extends directly below the center point of the keycap, and each of the light guide sheets has a connector opening at a position directly below the center point of the keycap, so that the corresponding lifting The lower end of the mechanism and the bottom plate are connected by a joint opening. When the key caps are pushed by the pressing force to move toward the bottom plate, the key caps transmit the pressing force through the light guide plate to trigger the corresponding switch unit.

In an embodiment, the illuminated keyboard further includes a plurality of lifting mechanisms, wherein the lower end of each lifting mechanism is connected to the bottom plate, and the upper end of each lifting mechanism is connected to one of the plurality of key caps to support the corresponding key cap to move relative to the bottom plate, and each key cap has a key cap At the center point, each light guide sheet is disposed above the bottom plate and has a central opening, and the center point of the key cap and each lifting mechanism are located in a vertical projection space of the central opening, so that the lower end of the lifting mechanism and the bottom plate are connected through the central opening, when each key cap When pushed by the pressure and moved toward the bottom plate, the corresponding switch unit is triggered through the central opening.

In an embodiment, the illuminated keyboard further comprises a frame, wherein the frame has a grid structure and a plurality of frame openings, wherein each of the key caps is located in one of the plurality of frame openings, and the mesh structure extends into the gap of the light guide plate, thereby limiting each The light energy emitted by the light guide plate travels only in the corresponding frame openings, so that the light energy cannot travel under the adjacent key caps.

In one embodiment, each of the light guide sheets is disposed above the bottom plate, and the bottom plate has a plurality of light source holes, and the plurality of light-emitting elements respectively provide light energy through the plurality of light source holes toward one side of the corresponding light guide sheet.

In one embodiment, each of the light guide sheets is disposed between the switch circuit layer and the bottom plate, and the switch circuit layer extends over the top of each of the light-emitting elements, and the light-emitting elements emit light energy portions that do not enter the light guide sheet, and the switch circuit layer is attenuated. Part of the light energy that does not enter the light guide.

In one embodiment, the plurality of light guide sheets are disposed between the bottom plate and the light source circuit layer, and the bottom plate has a plurality of light transmission holes, and the plurality of light guide sheets guide light energy to be emitted from the corresponding light transmission areas through the corresponding light transmission holes. .

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

In one embodiment, the mask layer has a plurality of holes, and the bottom plate has a plurality of light source holes respectively corresponding to the plurality of holes, and the plurality of light-emitting elements respectively pass through the plurality of holes to at least partially accommodate the plurality of light source holes.

In one embodiment, the switch circuit layer extends over the top of the plurality of light-emitting elements, and the light-emitting elements emit light energy portions that do not enter the light guide sheet, and the switch circuit layer attenuates portions of the light energy that does not enter the light guide sheet.

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 Corresponding to the light guide sheet and the light-emitting element of the same key cap.

In one embodiment, the spacer layer is a double-sided adhesive layer to adhere the mask layer and the light source circuit layer.

In one embodiment, the illuminated keyboard further includes a plurality of spacers, wherein the plurality of spacers are disposed in the light guide gap to prevent optical interference between adjacent plurality of keycap projection spaces.

In one embodiment, the illuminated keyboard further includes a control unit, wherein the control unit electrically connects the light source circuit layers to respectively control the intensity of the light energy provided by the plurality of light emitting elements.

In one embodiment, the plurality of light-emitting elements provide light energy comprising at least two different colors of light energy.

In another embodiment, the present invention provides an illuminated keyboard, including a bottom plate, a light source circuit layer, a switch circuit layer, a first key cap, a second key cap, a first light emitting element, a second light emitting element, and a first light guide sheet. And a second light guide sheet, wherein the light source circuit layer is disposed under the bottom plate; the switch circuit layer is disposed above the bottom plate, the switch circuit layer has a first switch unit and a second switch unit, and the first switch unit and the second switch unit are adjacent to each other The first keycap is disposed above the first switch unit and is movable relative to the bottom plate to trigger the first switch unit, the first keycap has a first light transmissive area, and the first keycap is substantially vertically projected to define the first key a cap projection space; the second key cap is disposed above the second switch unit, movable relative to the bottom plate to trigger the second switch unit, the second key cap has a second light transmissive area, and the second key cap is substantially vertically projected to define a second keycap projection space, the first keycap and the second keycap are separated by a keycap gap; the first light emitting component is disposed on the light source circuit layer and located in the first keycap projection space; the second light emitting component is disposed on the second keycap The light guide circuit layer is located in the second keycap projection space; the first light guide sheet is disposed between the light source circuit layer and the first keycap, and is located in the first keycap projection space, and the first light guide sheet has the first light input The second light guide sheet is disposed between the light source circuit layer and the second keycap, and is located in the second keycap projection space, and the second light guide sheet has the second light incident surface and the second upper light guide surface a light guiding surface, the first light guiding sheet and the second light guiding sheet are spaced apart from each other by a light guide plate gap, and the light guiding plate gap extends at least below the keycap gap; the first light emitting element provides the first light energy to the first light guiding sheet light incident surface, The first light energy is emitted from the first upper light exit surface to emit from the first keycap light transmitting region; the second light emitting element provides the second light energy to the second light guide sheet light incident surface, and the second light energy is from the second upper portion The light exiting surface emits light from the light transmitting area of the second keycap.

In an embodiment, the illuminated keyboard further comprises a frame, wherein the frame has a grid structure, the first frame opening and the second frame opening, the first key cap is located in the first frame opening, and the second key cap is located in the second frame In the opening, the mesh structure extends into the gap of the light guide plate, so that the first light energy emitted by the first light guide sheet is restricted to travel only in the first frame opening, so that the first light energy cannot travel under the second keycap .

In one embodiment, the illuminated keyboard further includes a spacer layer, wherein the spacer layer is disposed between the bottom plate and the light source circuit layer, the spacer layer has a spacer layer structure, the first spacer layer opening and the second spacer layer opening; the first light guide sheet and The second light guide sheet is disposed between the bottom plate and the light source circuit layer; the first spacer layer opening corresponds to the first key cap, the first spacer layer opening receives the first light guide sheet and the first light emitting element; and the second spacer layer The opening corresponds to the second keycap, the second spacing layer opening receives the second light guiding sheet and the second light emitting element; the spacer layer structure extends into the gap of the light guide plate, thereby limiting the first light energy emitted by the first light guiding sheet Traveling in the first spacer opening prevents the first light energy from traveling below the second keycap.

1‧‧‧ illuminated keyboard

10‧‧‧Key Module

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

110a, 110b‧‧‧ key cap

116a, 116b‧‧‧Transparent zone

120, 120'‧‧‧ bottom plate

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

126a, 126b‧‧‧ light source hole

128a, 128b‧‧‧ light hole

130a, 130b‧‧‧ Lifting mechanism

132‧‧‧First bracket

134‧‧‧second bracket

140, 140'‧‧‧ switch circuit layer

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

146a, 146b‧‧‧through holes

148a, 148b‧‧‧ switch unit

150‧‧‧Light source circuit layer

160a, 160b‧‧‧Response unit

170a, 170b, 170a', 170b'‧‧‧ light guide

172‧‧‧Central opening

174‧‧‧Into the glossy surface

176‧‧‧Upper surface

178a, 178b‧‧‧ Connector opening

180a, 180b‧‧‧Lighting elements

190‧‧‧Control unit

200‧‧‧Frame

210‧‧‧Grid structure

220, 220a, 220b‧‧‧ frame opening

240‧‧‧mask layer

242a, 242b‧‧ holes

250‧‧‧Interval

270a, 270b‧‧‧ light guide

30‧‧‧Lighting unit

300‧‧‧Light source circuit layer

310‧‧‧Lighting elements

320‧‧‧Light guide

322‧‧‧Into the glossy surface

324‧‧‧Glossy

330‧‧‧ spacer

332‧‧‧ interval opening

340‧‧‧mask layer

342‧‧‧Transmission Department

344‧‧‧Lighting Department

C1, C2‧‧‧ keycap center point

G1‧‧‧Key Cap Clearance

G2‧‧‧Light guide plate 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 and 2D are an exploded view and a cross-sectional view, respectively, of a modified embodiment of FIG. 2A.

3A and 3B are respectively an exploded view and a cross-sectional view of an illuminated keyboard according to another embodiment of the present invention.

4A and 4B are respectively an exploded view and a cross-sectional view of an illuminated keyboard according to another embodiment of the present invention.

4C is a schematic cross-sectional view of a variation of the embodiment of FIG. 4B.

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.

Figure 5C is a schematic cross-sectional view of a variation of Figure 5B.

Figure 5D is a schematic cross-sectional view of another variation of Figure 5B.

6A-6C 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.

The invention provides an illuminating keyboard, in particular to an illuminating keyboard capable of avoiding the interaction of light energy between the illuminating buttons, and has a illuminating mechanism corresponding to each button, so as to improve independent control of the illuminating of each button, and then can be controlled by the user. The overall illumination or partial illumination of the illuminated keyboard is achieved. 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. The details of the illuminated keyboard of the embodiment of the present invention will be described in detail with reference to the drawings, taking a computer keyboard (as shown in FIG. 1) as an example.

As shown in FIG. 1 , the illuminated keyboard 1 of the present invention includes a plurality of illuminated buttons 100 and a frame 200. 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 mesh structure 210 and a plurality of frame openings 220. The plurality of frame openings 220 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 220. The grid structure 210 is located between adjacent frame openings 220 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 switch circuit layer 140, a plurality of key caps (eg, a first keycap 110a and a second keycap 110b), and a plurality of light emitting Components (for example, first light-emitting element 180a and second light-emitting element 180b) and a plurality of light guide sheets (for example, first light guide sheet 170a and second light guide sheet 170b). Furthermore, the illuminated keyboard may further include a plurality of lifting mechanisms (for example, the first lifting mechanism 130a and the second lifting mechanism 130b) and a plurality of returning units (for example, the first replying unit 160a and the second returning unit 160b).

Specifically, the bottom plate 120 is disposed under the key caps 110a, 110b, and the two ends of the lifting mechanisms 130a, 130b are movably connected to the keycaps 110a, 110b and the bottom plate 120 respectively to support the movement of the key caps 110a, 110b relative to the bottom plate 120. . 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 return 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 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 light emitting diodes, and each The light-emitting elements 180a, 180b can emit light energy of a single color or different colors. As shown in FIG. 2B, the illuminated keyboard further includes a control unit 190 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.

Preferably, each of the light-emitting elements 180a, 180b is located in each of the keycap projection spaces S1, S2. 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. 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. 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.

The plurality of light guide sheets 170a, 170b are disposed apart from each other between the light source circuit layer 150 and the plurality of keycaps 110a, 110b, and are each located in the keycap projection spaces S1, S2. The adjacent light guide sheets 170a and 170b are spaced apart from each other by the light guide plate gap G2, and the light guide plate gap G2 preferably extends at least below the keycap gap G1. Specifically, the first light guide sheet 170a is disposed between the light source circuit layer 150 and the first keycap 110a, and is located in the first keycap projection space S1, and the second light guide sheet 170b is disposed on the light source circuit layer 150 and the first The two-key cap 110b is located in the second keycap projection space S2. The first light guide sheet 170a and the second light guide sheet 170b are spaced apart from each other by the light guide plate gap G2. The light guide plate gap G2 preferably extends at least below the keycap gap G1, that is, the light guide plate gap G2 and the keycap gap G1 are in a vertical space position. At least partially overlap. In one embodiment, the plurality of light guide plates 170a, 170b preferably do not exceed the plurality of keycap projection spaces S1, S2, that is, the light guide plate gap G2 is preferably substantially equal to or larger than the keycap gap G1, and the light energy can be The corresponding keycap projection spaces S1 and S2 are uniformly guided and prevented from interacting with the light energy in the adjacent keycap projection spaces S1 and S2, but are not limited thereto. In other words, "the light guide sheets 170a, 170b are located in the respective keycap projection spaces S1, S2" means that the light guide sheets 170a, 170b are substantially located in the corresponding keycap projection spaces S1, S2, and do not exclude slightly beyond the keycap projection. The spaces S1, S2, as long as the partial light guides 170a, 170b beyond the keycap projection spaces S1, S2, do not cause visually perceptible optical interference to the adjacent keycap projection spaces S1, S2.

Each of the light guiding sheets 170a and 170b has a light incident surface 174 and an upper light emitting surface 176. The plurality of light-emitting elements 180a and 180b respectively correspond to the plurality of light guide sheets 170a and 170b to provide light energy to the light-incident surface 174 of the corresponding light-guiding sheets 170a and 170b, and the light guide sheets 170a and 170b guide light from the upper portions. Face 176 exits and exits from light transmissive regions 116a, 116b of corresponding keycaps 110a, 110b. In this embodiment, the light-emitting elements 180a and 180b are preferably side-emitting light-emitting diodes, and the light-incident surface 174 of each of the light-guiding sheets 170a and 170b is a light guide sheet side surface, so that the light-incident surfaces 174 are preferably faced. Corresponding to the light-emitting surface of the light-emitting elements 180a and 180b, the upper light-emitting surface 176 is preferably the upper surface of the light guide sheet. Specifically, the first light-emitting element 180a provides a first light energy to the light-incident surface 174 of the first light guide sheet 170a, and the first light energy is emitted from the upper light-emitting surface 176 of the first light guide sheet 170a, and then the first light is emitted from the first light-emitting surface 170a. The light transmitting region 116a of the cap 110a is emitted. The second light-emitting element 180b provides a second light energy to the light-incident surface 174 of the second light guide sheet 170b, and the second light energy is emitted from the upper light-emitting surface 176 of the second light guide sheet 170b, so as to be transparent from the second keycap 110b. The light zone 116b is emitted.

In this embodiment, each of the keycaps 110a, 110b has a keycap center point C1, C2, and each of the light guide sheets 170a, 170b is disposed above the bottom plate 120 and the switch circuit layer 140, and each of the light guide sheets 170a, 170b has a central opening. 172; the keycap center points C1, C2 and each of the lifting mechanisms 130a, 130b are located in the vertical projection space of the central opening 172 such that the lower ends of the lifting mechanisms 130a, 130b are respectively connected to the bottom plate 120 through the corresponding central opening 172. In other words, each of the light guiding sheets 170a and 170b has a central opening 172 and has an annular outer shape, and the outer peripheral edges of the respective light guiding sheets 170a and 170b preferably correspond to the rectangular outer shape of the keycaps 110a and 110b. Therefore, a rectangular ring is preferable. The light guide sheets 170a and 170b can be fixed to the switch circuit layer 140 by adhesive means, so that the switch units 148a and 148 are respectively located in the central openings 172 of the corresponding light guide sheets 170a and 170b, but not limited thereto.

When the keycaps 110a, 110b are pressed and moved toward the bottom plate 120, the corresponding switch units 148a, 148b are triggered by the corresponding center opening 172. For example, in an embodiment, each of the keycap center points C1 and C2 may be provided with a triggering portion (not shown). When each of the keycaps 110a and 110b is pressed and moved toward the bottom plate 120, it is disposed at the center of the keycap. The triggering portions of C1, C2 can trigger the corresponding switching units 148a, 148b through the elastomer (ie, the return elements 160a, 160b) and the central opening 172. In another embodiment, the key caps 110a, 110b abut against the upper ends of the elastic bodies (ie, the recovery units 160a, 160b), and the triggering portions are disposed on the elastic inner surface, and when the respective keycaps 110a, 110b are pressed to move toward the bottom plate 120 The key caps 110a and 110b are pressed down to deform the elastic body, and the triggering portion of the elastic inner surface passes through the central opening 172 to trigger the corresponding switch units 148a and 148b.

Furthermore, when the light guide sheets 170a, 170b are disposed above the bottom plate 120, the bottom plate 120 may have a plurality of light source holes 126a, 126b, and the plurality of light-emitting elements 180a, 180b respectively pass through the plurality of light source holes 126a, 126b toward the corresponding guides. One of the sides of the light sheets 170a, 170b (i.e., the light incident surface 174) provides light energy. In this embodiment, each of the light guide sheets 170a and 170b is disposed on the switch circuit layer 140. Therefore, the switch circuit layer 140 also has a plurality of through holes 146a and 146b, and the plurality of light emitting elements 180a and 180b pass through the bottom plate 120 respectively. The light source holes 126a, 126b and the plurality of through holes 146a, 146b of the switch circuit layer 140 provide light energy to the light incident surface 174 of the corresponding light guide sheets 170a, 170b.

In addition, when the frame 200 is assembled with the light-emitting module 10 formed by the plurality of light-emitting buttons 100, as shown in FIG. 2B, each of the key caps 110a, 110b is respectively located in one of the plurality of frame openings 220a, 220b, and the mesh structure 210 The lower end extends into the light guide plate gap G2, thereby restricting the light energy emitted by the light guide sheets 170a, 170b from traveling only in the corresponding frame openings (for example, the first frame opening 220a and the second frame opening 220b). Light energy cannot travel below the adjacent keycaps 110a, 110b. In an embodiment, the mesh structure 210 may be a frame body between adjacent frame openings 220a, 220b, but is not limited thereto. In another embodiment, the grid structure 210 can be a portion that projects downwardly from the frame body between adjacent frame openings 220a, 220b. In this embodiment, the length of the grid structure 210 extending into the light guide plate gap G2 is preferably sufficient to abut the switch circuit layer 140, so that the adjacent key cap projection spaces S1 and S2 are separated by the mesh structure 210, thereby limiting each The light emitted from the upper light-emitting surface 176 of the light guide sheets 170a and 170b travels only through the corresponding frame openings 220a and 220b without interaction. For example, the grid structure 210 extends into the light guide plate gap G2, thereby limiting the first light energy emitted by the upper light exit surface 176 of the first light guide sheet 170a to travel only in the first frame opening 220a, so that the first light Can not travel below the second keycap 110b.

In the above embodiment, the light guide sheets 170a and 170b are implemented as an annular light guide sheet having a central opening 172, but are not limited thereto. In another embodiment, as shown in FIGS. 2C-2D, each of the light guide sheets 170a', 170b' may have a plurality of connector openings 178a, 178b corresponding to the connection mechanisms 122a, 124a, 122b, 124b of the bottom plate 120, thereby allowing The link mechanisms 122a, 124a, 122b, 124b are connected to the lift mechanisms 130a, 130b through the connector openings 178a, 178b. Specifically, each of the keycaps 110a, 110b has a keycap center point C1, C2, and each of the light guide sheets 170a', 170b' is disposed above the bottom plate 120 and the switch circuit layer 140 and extends directly below the center points C1 and C2 of the keycap. Each of the light guide sheets 170a', 170b' has a plurality of connector openings 178a, 178b at a position directly below the center point C1, C2 of the keycap, such that the lower ends of the corresponding lifting mechanisms 130a, 130b are connected by the connector openings 178a, 178b. Base plate 120. When the keycaps 110a, 110b are pressed and moved toward the bottom plate 120, the keycaps 110a, 110b transmit the pressing force through the corresponding light guiding sheets 170a', 170b' to trigger the corresponding switching units 148a, 148b. It should be noted that in this embodiment, the shape of the plurality of connector openings 178a, 178b is preferably corresponding to the plurality of through holes 142a, 144a, 142b, 144b of the switch circuit layer 140, so that the light guide sheets 170a', 170b The upper illuminating surface 176 has a maximum light guiding area, thereby improving the uniformity of illuminating.

In addition, each of the light guide sheets 170a and 170b is disposed on the switch circuit layer 140 in the above embodiment, but is not limited thereto. In another embodiment, as shown in FIG. 3A and FIG. 3B, the light guide sheets 170a', 170b' are light guide sheets having a plurality of connector openings 178a, 178b, and the light guide sheets 170a', 170b' are disposed. Between the switch circuit layer 140' and the bottom plate 120. For example, the light guide sheets 170a', 170b' can be respectively fixed to the positions of the bottom plate 120 corresponding to the key caps 110a, 110b by adhesive means. In this embodiment, the switch circuit layer 140' preferably extends over the top of each of the light-emitting elements 180a, 180b; if the light-emitting elements 180a, 180b emit light energy portions that do not enter the light guide sheets 170a', 170b', the switch circuit Layer 140' is capable of absorbing light energy that is not attenuated or reflected portions that do not enter light guide sheets 170a', 170b'. In other words, the difference between the embodiment of FIGS. 3A-3B and the embodiment of FIG. 2C is that (1) the light guide sheets 170a', 170b' are disposed under the switch circuit layer 140' and (2) the switch circuit layer 140' does not have The through holes 146a, 146b through which the light-emitting elements 180a, 180b pass; such that the switch circuit layer 140' covers the tops of the light-emitting elements 180a, 180b, thereby restricting the light energy emitted by the light-emitting elements 180a, 180b from being mostly guided by the sides thereof. The light incident surface 174 of the sheets 170a', 170b' enters, and the light emitted from the upper light exit surface 176 enters the keycap projection spaces S1, S2, and the light energy emitted from the light emitting elements 180a, 180b toward the switch circuit layer 140' (i.e., above) The light energy that has not entered the light guide sheets 170a', 170b' is attenuated or reflected by the absorption of the switch circuit layer 140'.

In the foregoing embodiment, each of the light guide sheets 170a, 170b or 170a', 170b' may be fixed in advance to the switch circuit layer 140 or the bottom plate 120, and then the switch circuit layer 140 or the bottom plate 120 is assembled to the button module, but not This is limited to this. In other embodiments, each light guide sheet can be assembled with the light source circuit layer and the light emitting element into a light emitting unit, and further assembled with the button unit into a button module. As shown in FIG. 4A and FIG. 4B, in another embodiment, the key caps 110a, 110b, the bottom plate 120', the lifting mechanism 130a, 130b, the switch circuit layer 140', and the returning units 160a, 160b constitute the above-mentioned button unit, wherein each The elements have structural details, connections or actuations similar to those of FIG. 2A or FIG. 3A and will not be described again. In this embodiment, the plurality of light guide sheets 270a, 270b are disposed between the bottom plate 120' and the light source circuit layer 150, and the bottom plate 120' has a plurality of light transmission holes 128a, 128b, and the plurality of light guide sheets 270a, 270b guide the light emitting elements. The light energy of 180a, 180b is emitted from the corresponding light transmitting regions 116a, 116b through the corresponding light transmitting holes 128a, 128b.

Specifically, the plurality of light guide sheets 270a and 270b may be disposed on the light source circuit layer 150 separately from each other by, for example, adhesive bonding, and the plurality of light emitting elements 180a and 180b are disposed on the light source circuit layer 150 and electrically connected to the corresponding light source of the light source circuit layer 150. a circuit to form a light unit. The plurality of light-emitting elements 180a and 180b preferably respectively correspond to the plurality of light guide sheets 270a and 270b to provide light energy to the light incident surfaces of the corresponding light guide sheets 270a and 270b, and each of the light guide sheets 270a and 270b guides light energy from above. The light exiting surface is emitted through the corresponding light transmission holes 128a, 128b of the bottom plate 120 from the light transmitting regions 116a, 116b of the corresponding key caps 110a, 110b. It should be noted here that when the light guide sheets 270a, 270b are disposed under the bottom plate 120', the light guide sheets 270a, 270b need not have the above-described connector openings 178a, 178b.

Moreover, as shown in FIG. 4C, the illuminated keyboard further includes a mask layer 240, wherein the mask layer 240 is disposed above the plurality of light guide sheets 270a, 270b to partially block the light energy. The mask layer 240 has a light blocking pattern to selectively block or allow light to pass therethrough. Specifically, the mask layer 240 is a light transmissive optical film and has a pattern on the film to shield portions of the keyboard device that do not require light. For example, the mask layer 240 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 positions of the light-transmissive aperture regions 116a, 116b, the mask layer 240 remains transparent to allow light to pass therethrough so that light can be emitted from the light-transmissive aperture regions 116a, 116b of the keycaps 110a, 110b.

In addition, as shown in FIG. 4C, the illuminated keyboard further includes a plurality of spacers 250, wherein the plurality of spacers 250 are disposed in the light guide gap G2 to prevent optical interference between adjacent plurality of keycap projection spaces S1, S2. For example, the plurality of spacers 250 may be formed of a light blocking material and disposed between adjacent light guide sheets 270a and 270b (for example, between the light guide sheet 270a and the light emitting element 180b) to block the light emitting element 180a and the light guide. The light of the sheet 270a can enter the keycap projection space S2, and the light of the light-emitting element 180b and the light guide sheet 270b can also be blocked from entering the keycap projection space S2.

In another embodiment, as shown in FIG. 5A and FIG. 5B, the embodiment is similar to the embodiment of FIG. 4A, except that the bottom plate 120 can have a plurality of light source holes 126a, 126b to allow the plurality of light-emitting elements 180a, 180b to at least partially respectively. It is accommodated in the plurality of light source holes 126a, 126b, thereby effectively reducing the height of the overall button. Moreover, similar to FIGS. 3A-3B, in this embodiment, the switch circuit layer 140' preferably extends over the top of the plurality of light-emitting elements 180a, 180b; if each of the light-emitting elements 180a, 180b emits light energy, the light-emitting portion does not enter the light guide. Instead of 270a, 270b scattering upward, the switch circuit layer 140' attenuates the absorption or reflection of some of the light energy that does not enter the light guide sheets 270a, 270b. In addition, when the illuminated keyboard includes the mask layer 240, as shown in FIG. 5C, the mask layer 240 may have a plurality of holes 242a, 242b, and the plurality of light source holes 126a, 126b of the bottom plate 120 respectively correspond to the plurality of holes 242a, 242b, such that the plurality The light-emitting elements 180a, 180b can be at least partially accommodated in the plurality of light source holes 126a, 126b through the plurality of holes 242a, 242b, respectively, but not limited thereto. In another embodiment, as shown in FIG. 5D, the mask layer 240 may have elastic deformation characteristics and the above-mentioned holes 242a, 242b are omitted, so that the mask layer 240 is elastically deformed when pressed by the plurality of light-emitting elements 180a, 180b. The light source holes 126a and 126b are respectively inserted into the top of each of the light-emitting elements 180a and 180b to prevent dust and protect the light-emitting elements 180a and 180b.

It should be noted that, in the foregoing embodiment, the plurality of spacers 250 can be disposed between the light guide sheets 270a and 270b independently, but not limited thereto. In other embodiments, the plurality of spacers 250 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. 6A to FIG. 6C , the light emitting unit 30 includes a light source circuit layer 300 , a plurality of light emitting elements 310 , a plurality of light guide sheets 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 plurality of light guides 320 are electrically connected to the corresponding light source circuit 300. The plurality of light guides 320 are disposed on the light source circuit layer 300, for example, by adhesion, and the light incident surface 322 of each light guide 320 preferably corresponds to the plurality of light emitting elements 310. One of the luminous surfaces. Similar to the mask layer 240 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 accommodating the light guide sheet 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 top of the light emitting element 310 to block the light emitting element 310 from being emitted but not entering the conductive layer 310. The upward direction of light energy of the light sheet 320. The size and shape of the light-transmitting portion 342 of the mask layer 340 preferably correspond to the light guide sheet 320, so that the light emitted from the light-emitting surface 324 of the light guide sheet 320 can enter the corresponding key cap projection space through the corresponding light-transmitting portion 342, thereby further The light is emitted from the corresponding light-emitting area of the keycap. The spacer layer 330 is preferably a double-sided adhesive layer, especially a dark double-sided adhesive layer, whereby the horizontal light energy emitted by the light-emitting element 310 but not entering the light guide sheet 320 can be effectively absorbed, and the mask layer 340 can be adhered. 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 or 120' by adhesion, snapping, locking or the like. By extending the body structure of the spacer layer 330 into the light guide plate gap G1, the light energy emitted by the light guide sheet 320 can be restricted from traveling only in the corresponding spacer layer opening 322, and cannot travel under the adjacent keycap.

Compared with the prior art, the illuminated keyboard of the present invention achieves an independent light guiding mechanism by separating the light guide sheets from each other, so as to limit the light energy to travel only in the corresponding key cap projection space, thereby avoiding optical interference between adjacent keys. It can achieve the function of multiple lights in the keyboard to emit multiple lights. Furthermore, the illuminated keyboard of the present invention has a light-emitting mechanism corresponding to each button to enhance independent control of the light-emitting of each button, and further achieves overall illumination or local illumination of the illuminated keyboard according to user control.

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 (18)

 An illuminated keyboard comprises: a bottom plate; a light source circuit layer disposed under the bottom plate; a switch circuit layer disposed above the bottom plate, the switch circuit layer having a plurality of switch units; and a plurality of key caps disposed on the switch circuit layer Upper and corresponding to the plurality of switch units, each of the key caps has a light transmissive area, and each of the key caps is movable relative to the bottom plate to trigger the corresponding switch unit, and each of the key caps is substantially vertically downwardly projected to have a a key cap projection space, two adjacent key caps are separated by a keycap gap; a plurality of light emitting elements are disposed on the light source circuit layer and located in each of the keycap projection spaces; and a plurality of light guide sheets are disposed separately from each other Between the light source circuit layer and the plurality of key caps, and located in each of the keycap projection spaces, each of the light guide sheets has a light incident surface and an upper light exit surface, and two adjacent plurality of light guide sheets are separated by a guide a light plate gap, the light guide plate gap extending at least below the keycap gap; wherein the plurality of light-emitting elements respectively correspond to the plurality of light guide plates to provide light energy to the corresponding light-introducing light of the light guide plate And each of the light guide plate for guiding the light from the upper surface of each of the light, corresponding to the transparent area from the exit of the keycap.    The illuminating keyboard of claim 1, further comprising a plurality of lifting mechanisms, wherein the lower end of each lifting mechanism is connected to the bottom plate, and the upper end of each lifting mechanism is connected to one of the plurality of key caps to support the corresponding key cap relative to the Each of the keycaps has a keycap center point, and each of the light guide sheets is disposed above the bottom plate and extends directly below the center point of the keycap, and each of the light guide sheets is located directly below the center point of the keycap Having a connector opening, such that the lower end of the corresponding lifting mechanism and the bottom plate are connected through the opening of the connecting piece, and when the key cap is pushed by the pressing force to move to the bottom plate, each of the key caps transmits the light guiding body The sheet transmits the pressing force to trigger the corresponding switching unit.    The illuminating keyboard of claim 1, further comprising a plurality of lifting mechanisms, wherein the lower end of each lifting mechanism is connected to the bottom plate, and the upper end of each lifting mechanism is connected to one of the plurality of key caps to support the corresponding key cap relative to the The bottom plate moves, each of the key caps has a keycap center point, each of the light guide sheets is disposed above the bottom plate and has a central opening, and the keycap center point and each of the lifting mechanisms are located in a vertical projection space of the central opening The lower end of the lifting mechanism and the bottom plate are connected through the central opening, and when the key cap is pushed by the pressing force to move toward the bottom plate, the corresponding opening unit is triggered by the central opening.    The illuminated keyboard of claim 1, further comprising a frame having a grid structure and a plurality of frame openings, each of the key caps being located in one of the plurality of frame openings, the mesh structure extending into In the gap of the light guide plate, the light energy emitted by each of the light guide sheets is restricted to travel only in the corresponding openings of the frame, so that the light energy cannot travel under the adjacent each of the keycaps.    The illuminating keyboard of claim 1, wherein each of the light guiding sheets is disposed above the bottom plate, the bottom plate has a plurality of light source holes, and the plurality of light emitting elements respectively pass through the plurality of light source holes toward the corresponding one of the light guiding sheets The light energy is provided on the side.    The illuminating keyboard of claim 5, wherein each of the light guiding sheets is disposed between the switching circuit layer and the bottom plate, and the switching circuit layer extends over the top of each of the light emitting elements, and each of the light emitting elements emits light. The portion of the light guide is not partially accessible, and the switch circuit layer attenuates the portion of the light energy that does not enter the light guide.    The illuminating keyboard of claim 1, wherein the plurality of light guiding sheets are disposed between the bottom plate and the light source circuit layer, and the bottom plate has a plurality of transparent holes, and the plurality of light guiding sheets guide the light energy to pass The corresponding light transmission hole is emitted from the corresponding light transmission area.    The illuminating keyboard of claim 7, further comprising a mask layer, wherein the mask layer is disposed above the plurality of light guide sheets to partially block the light energy.    The illuminating keyboard of claim 8, wherein the mask layer has a plurality of holes, the bottom plate has a plurality of light source holes respectively corresponding to the plurality of holes, and the plurality of light-emitting elements respectively pass through the plurality of holes to at least partially accommodate the plurality of light source holes .    The illuminating keyboard of claim 7, wherein the switch circuit layer extends over the top of the plurality of illuminating elements, each of the illuminating elements emitting light energy portion does not enter the light guide sheet, and the switch circuit layer attenuates the portion not entering the Light guide 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 layers is configured to receive the light guide sheet and the light emitting element corresponding to the same key cap.    The illuminated keyboard of claim 11, wherein the spacer layer is a double-sided adhesive layer to adhere the mask layer and the light source circuit layer.    The illuminated keyboard of claim 7, further comprising a plurality of spacers, wherein the plurality of spacers are disposed in the light guide gap to prevent optical interference between the adjacent plurality of keycap projection spaces.    The illuminating keyboard of any one of claims 1 to 13, further comprising a control unit, wherein the control unit is electrically connected to the light source circuit layer to respectively control the intensity of the light energy provided by the plurality of illuminating elements.    The illuminating keyboard of any one of claims 1 to 13, wherein the light energy provided by the plurality of illuminating elements comprises at least two different colors of light energy.    An illuminated keyboard includes: a bottom plate; a light source circuit layer disposed under the bottom plate; a switch circuit layer disposed above the bottom plate, the switch circuit layer having a first switch unit and a second switch unit, the first switch unit a switch unit and the second switch unit are adjacent to each other; a first key cap is disposed above the first switch unit and movable relative to the bottom plate to trigger the first switch unit, the first key cap has a first a light transmissive area, and the first keycap is substantially vertically projected to define a first keycap projection space; a second keycap is disposed above the second switch unit, and is movable relative to the bottom plate to trigger the first a second switch unit, the second key cap has a second light transmissive area, and the second key cap is substantially vertically projected to define a second key cap projection space, and the first key cap and the second key cap are spaced apart a first light-emitting element disposed in the light source circuit layer and located in the first keycap projection space; a second light-emitting element disposed on the light source circuit layer and located in the second keycap projection space First a light sheet disposed between the light source circuit layer and the first keycap and located in the first keycap projection space, the first light guide sheet having a first light incident surface and a first upper light exiting surface; a second light guide sheet disposed between the light source circuit layer and the second keycap and located in the second keycap projection space, the second light guide sheet having a second light incident surface and a second upper surface a light guide surface, the first light guide sheet and the second light guide sheet are separated by a light guide plate gap, the light guide plate gap extending at least below the keycap gap; wherein the first light emitting element provides the first light energy to the first a light guide surface of the light guide, the first light energy is emitted from the first upper light exit surface to be emitted from the first keycap light transmitting region; wherein the second light emitting element provides the second light energy to the second light guide The light sheet enters the light surface, and the second light energy is emitted from the second upper light exit surface to be emitted from the second keycap light transmitting area.    The illuminated keyboard of claim 16, further comprising a frame having a grid structure, a first frame opening and a second frame opening, the first key cap being located in the first frame opening The second keycap is located in the second frame opening, and the mesh structure extends into the light guide plate gap, thereby limiting the first light energy emitted by the first light guide to open only in the first frame The middle travels so that the first light energy cannot travel below the second keycap.    The illuminating keyboard of claim 16, further comprising a spacer layer, wherein the spacer layer is disposed between the bottom plate and the light source circuit layer, the spacer layer has a spacer layer structure, a first spacer layer opening and a first a second spacer opening; wherein the first light guide sheet and the second light guide sheet are disposed between the bottom plate and the light source circuit layer; the first spacer layer opening corresponds to the first key cap, the first spacer layer The opening is configured to receive the first light guiding sheet and the first light emitting element; the second spacing layer opening corresponds to the second keycap, and the second spacing layer opening receives the second light guiding sheet and the second light emitting layer The spacer layer structure extends into the gap of the light guide plate, so as to limit the first light energy emitted by the first light guide sheet to travel only in the opening of the first spacer layer, so that the first light energy cannot travel to the Below the second keycap.