TWI598918B - Illuminated keyboard - Google Patents

Description

Illuminated keyboard

The invention relates to a keyboard, in particular to an illuminated keyboard.

Some illuminated keyboards use a single light guide plate placed under the keycap to provide a monochrome backlight of the keyboard. The light source is mostly provided by one or two light bars, but such illuminated keyboards cannot provide backlights of different colors for different keycaps. Therefore, there is no need to avoid mutual interference between the light sources. Some illuminating keyboards are provided with corresponding illuminating elements under the keycaps, and the individual illuminating elements are controlled to achieve different color backlights for different keycaps. In order to prevent the light emitted by the light-emitting elements from interfering with each other, a mask member is usually placed on each of the light-emitting elements to restrain the light emitted by the light-emitting elements from being emitted only to the corresponding key caps, so that the light emitted by each of the light-emitting elements is not in principle Mutual interference also suppresses the phenomenon that light emitted by each element is mixed with each other. However, separately providing a mask for each of the illuminating elements will greatly increase the number of parts of the illuminating keyboard and increase the complexity of assembling the illuminating keyboard.

In view of the problems in the prior art, the present invention provides an illuminated keyboard, which provides a plurality of light-emitting elements disposed on the circuit board by using a dielectric layer stacked between a circuit board and a bottom plate and having a plurality of hollow structures. The light emitted by the plurality of light emitting elements is prevented from interfering with each other.

An illuminated keyboard according to an embodiment of the invention comprises a plurality of keycaps, a bottom plate, a plurality of lifting mechanisms, a dielectric layer and a lighting module. The bottom plate is disposed under the plurality of key caps, the bottom plate has a plurality of first holes, and each of the first holes corresponds to one of the plurality of key caps. The plurality of lifting mechanisms are disposed between the bottom plate and the plurality of key caps, and each lifting mechanism corresponds to one of a plurality of key caps, and each of the key caps can move up and down relative to the bottom plate via the corresponding lifting mechanism . The dielectric layer is disposed under the bottom plate, the dielectric layer prevents light from penetrating and has a plurality of second holes, each of the first holes being electrically connected to one of the plurality of second holes. The illuminating module includes a circuit board and a plurality of illuminating elements disposed on the circuit board. The circuit board is disposed under the dielectric layer, and each of the illuminating elements is disposed in one of the plurality of second holes. Wherein, the vertical direction light emitted by each of the light-emitting elements can pass through the corresponding first hole and travel to the corresponding corresponding key cap. Thereby, the light emitted by each of the light-emitting elements is restrained by the dielectric layer, so that the light emitted by each of the light-emitting elements does not interfere with each other in principle.

According to another embodiment of the present invention, an illuminated keyboard comprises two key caps, a bottom plate, two lifting mechanisms, a dielectric layer and a lighting module. The bottom plate is disposed under the two keycaps, the bottom plate has a first set of holes and a third set of holes, and the first set of holes and the third set of holes respectively correspond to one of the two keycaps. The two lifting mechanisms are disposed between the bottom plate and the two keycaps, and each lifting mechanism corresponds to one of the two keycaps, and each of the keycaps can move up and down relative to the bottom plate via the corresponding lifting mechanism. The dielectric layer is disposed under the bottom plate, the dielectric layer prevents light from penetrating and has a second hole and a fourth hole, the first group of holes is electrically connected to the second hole, and the third group of holes and the fourth hole The hole is turned on. The illuminating module includes a circuit board and a first illuminating component and a second illuminating component disposed on the circuit board, the circuit board is disposed under the dielectric layer, and the first illuminating component is disposed in the second hole The second light emitting element is disposed in the fourth hole. The vertical direction light emitted by the first illuminating element can pass through the second hole and the first set of holes to advance to the corresponding key cap, and the horizontal ray emitted by the first illuminating element cannot pass through the medium. The layer travels to the third group of holes; the vertical direction light emitted by the second illuminating element can pass through the fourth hole and the third group of holes to travel to the corresponding key cap above, and the second illuminating element emits Light in the horizontal direction cannot travel through the dielectric layer to the first set of holes. Thereby, the light emitted by the first light-emitting element and the second light-emitting element respectively is restrained by the dielectric layer, so that the light emitted by the first light-emitting element and the second light-emitting element does not interfere with each other in principle.

Compared with the prior art, the button structure according to the present invention uses a single structural member, that is, the dielectric layer, to block the light emitted by each of the light-emitting elements, and to prevent the light emitted by the respective light-emitting elements from interfering with each other. Moreover, the key structure according to the present invention has a structurally simplified effect compared to the conventionally provided illuminated keyboard for different keycaps.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

Please refer to Figure 1 to Figure 3. An illuminated keyboard 1 according to an embodiment of the present invention includes an upper cover 10, a lower cover 12, a plurality of keycaps 14, a bottom plate 16, a plurality of lifting mechanisms 18, a dielectric layer 20, and a light emitting module 22, and the upper cover 10 The bottom cover 12 is coupled to receive a plurality of keycaps 14, a bottom plate 16, a plurality of lifting mechanisms 18, a dielectric layer 20, and a light emitting module 22; in FIG. 3, the bottom plate 16, the dielectric layer 20, and the light emitting module 22 are It can be clearly shown that its dimensions in the vertical direction are exaggerated. The bottom plate 16 is disposed under the plurality of keycaps 14. The plurality of lifting mechanisms 18 are disposed between the bottom plate 16 and the plurality of keycaps 14. Each of the lifting mechanisms 18 corresponds to one of the plurality of keycaps 14, Each of the keycaps 14 is movable up and down with respect to the bottom plate 16 via the corresponding lifting mechanism 18. The plurality of keycaps 14 are exposed from a window 102 of the upper cover 10. The dielectric layer 20 is disposed under the bottom plate 16, and the light emitting module 22 includes A circuit board 222 and a plurality of light emitting elements 224 disposed on the upper surface 2222 of the circuit board 222 are disposed under the dielectric layer 20. In practice, the circuit board 222 can be a printed circuit board or a flexible board. In the present embodiment, the lifting mechanism 18 is a scissor-type bracket, and includes two mutually pivoted brackets, a lifting mechanism 18 and a connecting structure 164 disposed on the upper surface 162 of the bottom plate 16 and a bottom surface 142 disposed on the keycap 14. The upper connecting structure 144 (in a key cap 14 of FIG. 2, the hidden outline is shown) is respectively connected, but the invention is not limited thereto. In principle, any mechanism capable of providing relative movement of the keycap 14 relative to the bottom plate 16 can be used as the lifting mechanism of the present invention. Therefore, the lifting mechanism used in the conventional button structure currently available on the market can be applied.

In addition, the bottom plate 16 has a plurality of first holes 166, each of which is located below one of the plurality of key caps 14, and the dielectric layer 20 has a plurality of second holes 202, each of the first holes 166 and the One of the plurality of second apertures 202 is conductive (ie, the spaces formed by the apertures 166, 202 are in communication). Each of the light emitting elements 224 is correspondingly disposed in one of the plurality of second holes 202. The vertical direction light (indicated by the arrow) emitted by each of the light-emitting elements 224 can travel through the corresponding first aperture 166 to the corresponding upper keycap 14. In addition, in the embodiment, the second hole 202 also corresponds to one of the plurality of key caps 14. The first hole 166, the second hole 202 and the key cap 14 have a one-to-one arrangement relationship, but the present invention does not This is limited.

In addition, in the embodiment, the bottom plate 16 is a metal plate stamping member, so it is opaque. In practice, the bottom plate 16 can also be realized by a plastic injection piece, and the opaque plastic can also be used to make the plastic injection part opaque. Moreover, in the present embodiment, the dielectric layer 20 prevents light from penetrating, that is, the dielectric layer 20 prevents light from entering and/or entering the dielectric layer 20 from being absorbed by the dielectric layer 20 so that the light does not penetrate the dielectric layer 20. This can be achieved by using appropriate materials or structures. Therefore, the light emitted from the light-emitting element 224 can only be transmitted to the corresponding key cap 14 via the corresponding second hole 202 and the first hole 166, and does not enter the other second hole 202 or the first hole 166 to affect other light. Light emitted by element 224. Similarly, the light emitted by each of the light-emitting elements 224 can be directed to the corresponding keycap 14 without interference. Thereby, the light received by each of the keycaps 14 is predictable, in other words, the backlight provided to each of the keycaps 14 can be precisely controlled.

In addition, in practice, when the dielectric layer 20 is made of a light absorbing material (for example, translucent PET, PC, etc.), the intensity of light passing through the dielectric layer 20 is attenuated to a certain extent, and the light is not penetrated. Dielectric layer 20. This degree can be determined by actual product specifications or experiments. For example, if the light intensity is attenuated to less than 5%, the light mixing between the light from different light-emitting elements 224 is not obvious or negligible, and the degree of light attenuation can be regarded as light. The dielectric layer 20 is penetrated. This control of the attenuation of the light intensity can be controlled by the material or size of the dielectric layer 20. In addition, when the dielectric layer 20 is prevented from penetrating by light, in practice, the dielectric layer 20 may directly be a light-reflecting material (for example, a reflective powder (for example, alumina, silver oxide, barium sulfate) is dispersed therein. A sheet made of a material or the like, or a sheet made of any material (for example, a material such as transparent PET or PC) and coated with a reflective material (for example, aluminum oxide, silver oxide, barium sulfate, or the like) on the surface thereof. Moreover, in practice, the dielectric layer 20 is also partially reflective and partially refracted to prevent light from penetrating. For example, the dielectric layer 20 is implemented in combination with the foregoing illustrative examples. When the dielectric layer 20 is protected by a total reflection mechanism to prevent light from penetrating or completely absorbing light entering the dielectric layer 20, the dielectric layer 20 is considered to be made of an opaque material or structure. For details of implementation, reference may be made to the aforementioned Description of the dielectric layer 20 made of a light material and an absorbable light material.

In addition, in the present embodiment, the dielectric layer 20 closes (or seals) the gap between the bottom plate 16 and the circuit board 222 (for example, the upper surface of the dielectric layer 20 abuts the lower surface 168 of the bottom plate 16 and the lower surface of the dielectric layer 20 Adhering to the upper surface of the circuit board 222, and each of the light-emitting elements 224 is surrounded by the dielectric layer 20. Thereby, the light emitted by the light-emitting element 224 does not enter the other second holes 202 through the gap. Moreover, when the dielectric layer 20 is made of a light absorbing material, the horizontal light rays (indicated by arrows) emitted by each of the light emitting elements 224 are intended to travel under the adjacent keycaps 14, and the horizontal light rays will enter the dielectric layer 20 and It is greatly absorbed and attenuated to an acceptable level, as explained in the previous paragraph. The horizontal direction light means that the entire traveling path is oriented in a horizontal direction. For example, the light that is reflected and reflected multiple times between the bottom plate 16 and the circuit board 222 in FIG. 3 also belongs to the light.

In addition, in the present embodiment, the contour of the second hole 202 is larger than the contour of the corresponding first hole 166. This structural configuration can concentrate the intensity of the light emitted by the light-emitting element 224 through the first aperture 166. In addition, in this embodiment, the light-emitting element 224 can be a surface-mounted light-emitting diode component, and the light-emitting surface thereof faces the bottom surface 142 of the keycap 14; however, the invention is not limited thereto. For example, using a plug-in light-emitting diode, the light-emitting surface is usually a half sphere. In addition, in practice, the illuminating element 224 can include three illuminating wafers, such as red, green, and blue light-emitting diodes; thereby, the illuminating element 224 can selectively control the illuminating of the illuminating wafer. To provide a variety of shades of light. Moreover, in practice, a second aperture 202 (or a first aperture 166) can correspond to the plurality of illumination elements 224 to respectively emit different colored lights. The variability of the visual effect of the illuminated keyboard 1 is increased by the mixing of different colored lights (ie, selectively causing one or more of the light-emitting elements 224 to simultaneously emit light) to provide a backlight of a different color of the corresponding keycap 14.

In addition, in the embodiment, the illuminated keyboard 1 further includes a thin film circuit board 24 and a plurality of elastic protrusions 26 disposed between the light emitting module 22 and the plurality of keycaps 14 (or the bottom plate 16 and the plurality of keys) Between caps 14). The thin film circuit board 24 includes a plurality of switches 242 (shown in hatching in FIG. 2) and a plurality of through holes 244, each of which is located below one of the plurality of keycaps 14, the plurality of The through hole 244 is passed through the connection structure 164 of the bottom plate 16 to be coupled to the corresponding lifting mechanism 18. The plurality of elastic knobs 26 are disposed between the film circuit board 24 and the plurality of keycaps 14. Each of the resilient knobs 26 corresponds to one of the plurality of switches 242 and is located on the corresponding switch 242. When the keycap 14 is keyed, the corresponding resilient knob 26 can be pressed by the keycap 14 to trigger the corresponding switch 242. It should be noted that, in this embodiment, the illuminated keyboard 1 can include a control module 28 (shown in simplified form in a rectangular frame), and is electrically connected to the thin film circuit board 24 and the light emitting module 22 (the connection details are not It is shown in the figure to simplify the drawing). In practice, the electrical connection between the control module 28 and the thin film circuit board 24 and the light emitting module 22 can be implemented by means of a connector or direct soldering. Thereby, the illuminated keyboard 1 passes through the control module 28 to control the operation of the thin film circuit board 24 and the light emitting module 22 and communicate with external electronic devices. The function and structure of the control module can be implemented by a module in the general illuminated keyboard that is responsible for controlling the operation of the electronic component, and will not be further described herein. In practice, the control module 28 can be integrated with the circuit board 24 or the circuit board 222 of the light module 22 according to the actual design.

In addition, in the embodiment, the thin film circuit board 24 is a three-layer structure (shown in a single structural cross section in the figure to simplify the drawing), and the opposite surfaces of the upper and lower structural layers are formed with circuits for connecting the plural The switch 242 has an intermediate structure layer that insulates the upper and lower layers of the circuit and forms openings at the corresponding switch 242. The three structural layers are all made of a light transmissive material, such as PET, PC, or the like. Both the switch 242 and the resilient knob 26 are located above the corresponding light emitting element 224. The elastic knob 26 is made of a transparent or translucent (or light transmissive) material such as silicone rubber. Thereby, the vertical direction light emitted by the light-emitting element 224 can pass through the thin film circuit board 24 and the elastic round 26 to reach the bottom surface 142 of the keycap 14. Moreover, in practice, the keycap 14 can include a light transmitting portion 146 (showing its arrangement area in a dashed box in FIG. 3), extending through the bottom surface 142 and the top surface 148 of the keycap 14, so that the light can be further The keycap 14 is ejected from the top surface 148 via the light transmissive portion 146, thereby producing an optical indicating effect, such as the light transmissive portion 146 having a letter outline on the top surface 148 (shown in phantom in Figure 1).

In addition, in the embodiment, although the through hole of the bottom plate 16 facing the light emitting element 224 is defined as the first hole 166, as shown in FIG. 2, based on the opening range of the second hole 202, other passages on the bottom plate 16 are provided. The aperture can also allow light to pass through to the corresponding keycap 14, so it can also serve as the first aperture. Further explanation is as follows. Please also refer to Figures 4 and 5. 4 is a cross-sectional view of the illuminated keyboard of FIG. 1 along line Y-Y. To clearly show the arrangement between the components, only the range of one button structure is displayed. 5 is a partial enlarged view of the thin film circuit board 24, the bottom plate 16, the dielectric layer 20, and the light emitting module 22 of FIG. 2, and only two adjacent key structures are selected for selection, and the selection is only described with reference to FIG. Not limited to this. The bottom plate 16 has a first set of holes 176a and a third set of holes 176b corresponding to the two key caps 14. The first set of holes 176a and the third set of holes 176b are respectively located below one of the two key caps 14, respectively. The layer 20 corresponding to the two key caps 14 respectively has a second hole and a fourth hole (ie, the hole 202 in the foregoing), and the first group of holes 176a and the second hole (ie, the corresponding hole 202) are electrically connected, the third group The hole 176b is electrically connected to the fourth hole (ie, the corresponding hole 202). The two light-emitting modules 22 respectively include a first light-emitting element and a second light-emitting element (ie, the light-emitting element 224 in the foregoing), wherein the first light-emitting element is disposed in the second hole, the second The light emitting element is disposed in the fourth hole (ie, the two light emitting elements 224 are correspondingly disposed in the two holes 202). In the present embodiment, the first group of holes 176a and the third group of holes 176b have the same structure. Therefore, the first group of holes 176a will be exemplified below, and the third group of holes 176b may be directly referred to, and will not be further described. The first set of holes 176a includes a central hole (i.e., the hole 166 in the foregoing), four openings 166a (formed to form the joint structure 164, such as an opening formed by sheet metal forming a joint 164), and two The through hole 166b; wherein the central hole is located directly below the corresponding elastic protrusion 26, and the corresponding light emitting element 224 (ie, the first light emitting element) is aligned with the central hole. As shown in FIG. 4, the vertical direction light emitted by the first light-emitting element (ie, the light-emitting element 224 in the figure) can pass through the second hole (ie, the hole 202 in the figure) and the first group of holes 176a to advance to the upper side. The key cap 14 can not travel through the dielectric layer 20 to the third group of holes 176b (see FIG. 3). Similarly, the light emitted by the second light-emitting element (corresponding to the light-emitting element 224 of the third group of holes 176b) can pass through the fourth hole (corresponding to the hole 202 of the third group of holes 176b) and the third group of holes 176b. Advancing to the corresponding keycap 14 above, the horizontal ray emitted by the second illuminating element cannot pass through the dielectric layer 20 and travel to the first set of holes 176a (see also FIG. 3). In addition, as shown in FIG. 4, when the vertical direction light emitted by the first light-emitting element passes through the corresponding elastic protrusion 26, the vertical direction light is diffused by the corresponding elastic knob 26.

In addition, since the light-emitting element 224 is disposed in the hole 202, in principle, the hole 202 of the dielectric layer 20 is closely adhered (or bonded) to the bottom plate 16 and the circuit board 222 to effectively prevent light from entering the bottom plate 16 and the circuit board 222. The gap between the two. Please also refer to Figure 6. For example, the second hole and the fourth hole (ie, the hole 202) respectively have a peripheral edge 202a, and the upper surface 204 of the dielectric layer 20 is coated with an annular first adhesive layer 206 along the peripheral edge 202a (both in FIG. 5 The hatching indicates its coating range, and is indicated by a thick line segment in FIG. 6), and the lower surface 208 of the dielectric layer 20 is coated with a circular second adhesive layer 210 along the peripheral edge 202a (the coating range is not shown in the figure). 5, but symmetric with the coating range of the first adhesive layer 206, and shown in thick line segments in FIG. 6). Additionally, in fact, dielectric layer 20 has a thickness such that aperture 202 has closed sidewalls and open edges at upper surface 204 and lower surface 208 of dielectric layer 20. The dielectric layer 20 is relatively thin relative to the overall size of the illuminated keyboard 1, so that the aperture 202 corresponds to an aperture edge at the overall scale of the illuminated keyboard 1. Thus, as explained herein, the aforementioned peripheral edge 202a is included in the open edge of the upper surface 204 and the lower surface 208 of the dielectric layer 20; for simplicity of explanation, the aforementioned peripheral edge 202a can be considered as the contour of the aperture 202. The upper surface 204 of the dielectric layer 20 is adhered to the lower surface 168 of the bottom plate 16 by the first adhesive layer 206 at the peripheral edge 202a. The dielectric layer 20 is adhered to the circuit board 222 by the second adhesive layer 210 at the peripheral edge 202a. The surface 2222 is such that the dielectric layer 20 closes the gap between the bottom plate 16 and the circuit board 222 at the peripheral edge 202a. Therefore, the light does not enter between the dielectric layer 20 and the bottom plate 16 from the hole 202 and the bottom plate 16 after being emitted from the light-emitting element 224. It also does not enter between the dielectric layer 20 and the circuit board 222 from between the hole 202 and the circuit board 222. In addition, in practice, the first adhesive layer 206 and the second adhesive layer 210 are also made of an opaque material.

In addition, in the foregoing embodiments, the light-emitting elements 224 are all located in the second hole 202, but the invention is not limited thereto. As shown in FIG. 7, in another embodiment, in addition to being located in the second hole 202, a portion of the light-emitting element 224 also extends into the corresponding first hole 166 (ie, the central hole), which makes it easier to make most of the self-luminous elements. The light emitted by 224 all travels toward the keycap 14, thereby increasing the intensity of the backlight. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

1‧‧‧ illuminated keyboard
10‧‧‧Upper cover
102‧‧‧ window
12‧‧‧Under the cover
14‧‧‧Key Cap
142‧‧‧ bottom surface
144‧‧‧ Connection structure
146‧‧‧Transmission Department
148‧‧‧ top surface
16‧‧‧floor
162‧‧‧ upper surface
164‧‧‧ Connection structure
166‧‧‧ first hole
166a‧‧‧Opening
166b‧‧‧through hole
168‧‧‧ lower surface
176a‧‧‧First set of holes
176b‧‧‧The third group of holes
18‧‧‧ Lifting mechanism
20‧‧‧ dielectric layer
202‧‧‧second hole
204‧‧‧Upper surface
206‧‧‧First layer
208‧‧‧ lower surface
210‧‧‧Second layer
22‧‧‧Lighting module
222‧‧‧ circuit board
2222‧‧‧ upper surface
224‧‧‧Lighting elements
24‧‧‧Film board
242‧‧‧Switch
26‧‧‧Flexible round
28‧‧‧Control Module

1 is a schematic diagram of an illuminated keyboard in accordance with an embodiment of the present invention. 2 is an exploded view of the illuminated keyboard of FIG. 1. 3 is a cross-sectional view of the illuminated keyboard of FIG. 1 taken along line X-X. Figure 4 is a cross-sectional view of the illuminated keyboard of Figure 1 taken along line Y-Y. Figure 5 is a partial enlarged view of Figure 2. 6 is a cross-sectional view of an illuminated keyboard in accordance with another embodiment. 7 is a cross-sectional view of an illuminated keyboard in accordance with another embodiment.

1‧‧‧ illuminated keyboard

10‧‧‧Upper cover

102‧‧‧ window

12‧‧‧Under the cover

14‧‧‧Key Cap

142‧‧‧ bottom surface

144‧‧‧ Connection structure

146‧‧‧Transmission Department

148‧‧‧ top surface

16‧‧‧floor

162‧‧‧ upper surface

166‧‧‧ first hole

168‧‧‧ lower surface

18‧‧‧ Lifting mechanism

20‧‧‧ dielectric layer

202‧‧‧second hole

22‧‧‧Lighting module

222‧‧‧ circuit board

224‧‧‧Lighting elements

24‧‧‧Film board

242‧‧‧Switch

26‧‧‧Flexible round

Claims (10)

An illuminated keyboard comprising: a plurality of keycaps; a bottom plate disposed under the plurality of keycaps, the bottom plate having a plurality of first holes, each of the first holes corresponding to one of the plurality of keycaps; a lifting mechanism disposed between the bottom plate and the plurality of key caps, each lifting mechanism corresponding to one of the plurality of key caps, wherein each of the key caps can move up and down relative to the bottom plate via the corresponding lifting mechanism; a dielectric layer disposed under the bottom plate, the dielectric layer preventing light from penetrating and having a plurality of second holes, each of the first holes being electrically connected to one of the plurality of second holes; and a light emitting module comprising a circuit board and a plurality of light-emitting elements disposed on the circuit board, the circuit board is disposed under the dielectric layer, and each of the light-emitting elements is correspondingly disposed in one of the plurality of second holes; wherein each of the light-emitting elements The emitted vertical direction light can travel through the corresponding first aperture to the corresponding keycap above. The illuminated keyboard of claim 1, wherein the dielectric layer encloses a gap between the backplane and the circuit board, and each of the light emitting elements is surrounded by the dielectric layer. The illuminated keyboard of claim 1, wherein a contour of one of the plurality of second apertures is greater than an outline of the corresponding first aperture. The illuminating keyboard of claim 1, wherein one of the plurality of illuminating elements comprises three illuminating wafers that respectively emit different colored lights. The illuminating keyboard of claim 1, wherein one of the plurality of illuminating elements protrudes into the corresponding first hole. The illuminated keyboard of claim 1, wherein the dielectric layer is selected from the group consisting of a light absorbing material, a light permeable material, and an opaque material. The illuminating keyboard of claim 1, further comprising a thin film circuit board disposed between the light emitting module and the plurality of key caps, wherein the thin film circuit board comprises a plurality of switches, each switch corresponding to the plurality of switches Below the keycap. An illuminated keyboard comprises: two key caps; a bottom plate disposed under the two key caps, the bottom plate having a first set of holes and a third set of holes, the first set of holes and the third set of holes respectively Correspondingly located under one of the two keycaps; two lifting mechanisms are disposed between the bottom plate and the two keycaps, each lifting mechanism corresponding to one of the two keycaps, each of the keycaps corresponding thereto a lifting mechanism capable of moving up and down relative to the bottom plate; a dielectric layer disposed under the bottom plate, the dielectric layer preventing light from penetrating and having a second hole and a fourth hole, the first group of holes and the first The second hole is electrically connected to the fourth hole; and the light emitting module comprises a circuit board and a first light emitting component and a second light emitting component disposed on the circuit board, the circuit board is disposed The first illuminating element is disposed in the second hole, and the second illuminating element is disposed in the fourth hole; wherein the vertical ray emitted by the first illuminating element passes through the second Hole with the first group The hole travels to the corresponding key cap above, the horizontal light emitted by the first light-emitting element cannot pass through the dielectric layer and travels to the third group of holes; wherein the vertical light emitted by the second light-emitting element can be worn The fourth hole and the third group of holes travel to the upper corresponding key cap, and the horizontal light emitted by the second light emitting element cannot pass through the dielectric layer and travel to the first set of holes. The illuminated keyboard of claim 8, wherein the second hole has a peripheral edge, and the upper surface of the dielectric layer is coated with an annular first adhesive layer along the circumference, and a lower surface of the dielectric layer is coated along the circumference. a second adhesive layer, the dielectric layer is adhered to the lower surface of the bottom plate by the first adhesive layer at the periphery, and the dielectric layer is adhered to the circuit board by the second adhesive layer at the periphery The surface is such that the dielectric layer closes the gap between the bottom plate and the circuit board at the periphery. The illuminated keyboard of claim 8, wherein the illuminated keyboard further comprises an elastic dome, the first set of holes comprising a central hole, the central hole being directly below the elastic dome, the first light emitting element being paired The central hole is diffused by the elastic circular protrusion when the vertical direction light emitted by the first light-emitting element passes through the elastic circular protrusion.