TWI652711B - Luminous keyboard and backlight module thereof - Google Patents

Abstract

The illuminated keyboard comprises a button module having a button and a bottom plate and a backlight module disposed under the button module. The backlight module includes a light source for providing light, a light guide plate having a first hole, a light shielding sheet disposed on an opposite side of the light guide plate, and a reflection sheet. The light shielding sheet has a second hole and a first bonding portion. The reflection sheet has a third hole, a second bonding portion, and a third bonding portion. The third hole corresponds to the first hole and the second hole. The vertical projection of the first bonding portion, the second bonding portion and the third bonding portion on the light guide plate is in the first hole, and the vertical projection of the third bonding portion in the light shielding film is in the second hole. The first bonding portion is bonded to the second bonding portion, and the third bonding portion is adhered to the bottom plate to prevent light from being emitted from the first bonding portion and the second bonding portion through the second hole toward the button module.

Description

Illuminated keyboard and backlight module thereof

The present invention generally relates to an illuminated keyboard and a backlight module thereof. Specifically, the present invention relates to an illuminated keyboard and a backlight module thereof that prevent light from leaking from a bonding film of a backlight module.

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. Generally, for heat dissipation or positioning design, the backlight module usually needs to be provided with a through hole for airflow or for a positioning mechanism (such as a positioning post, a screw, etc.). However, the backlight module is usually composed of a plurality of film bonds, and the light in the strong light (for example, near the light source) may still be emitted from the through hole through the glue around the through hole to cause light leakage. Moreover, as the use time increases or the light is too strong, the adhesive may age and lose the viscosity, so that the bonding of the backlight module diaphragm forms an open glue, and the phenomenon of light leakage through the through hole is more serious.

Therefore, how to effectively improve the light leakage phenomenon of the through hole is one of the focuses of research and development.

An object of the present invention is to provide an illuminated keyboard and a backlight module thereof, which are capable of improving light leakage by bonding a reflective sheet of a backlight module to a button module or a positioning mechanism at a through hole.

Another object of the present invention is to provide an illuminated keyboard and a backlight module thereof. The adhesion of the adhesive to the bottom plate of the button module is strong, and the diaphragm of the backlight module is reliably adhered to the bottom plate of the button module, thereby reducing the chance of opening the glue to improve the light leakage phenomenon.

In one embodiment, the present invention provides a backlight module suitable for use in a button module. The button module includes a plurality of button units and a bottom plate, and the plurality of button units are disposed on the bottom plate. The backlight module of the present invention comprises a light source, a light guide plate, a light shielding sheet and a reflection sheet, wherein the light source provides light; the light guide plate has a first hole, and the light guide plate guides the light to the plurality of button units; the light shielding sheet is disposed on one side of the light guide plate And adjacent to the bottom plate, the light shielding sheet has a second hole and a first bonding portion, the second hole corresponds to the first hole, the first bonding portion is disposed around the second hole and the vertical projection of the first bonding portion on the light guiding plate In the first hole, the reflective sheet is disposed on the other side of the light guide plate with respect to the light shielding sheet, the reflective sheet has a third hole, a second bonding portion and a third bonding portion, and the third hole corresponds to the first hole and the second hole a hole, the third bonding portion is disposed around the third hole and between the second bonding portion and the third hole, and the vertical projection of the second bonding portion and the third bonding portion on the light guide plate is in the first hole The vertical projection of the third bonding portion on the light shielding film is in the second hole. The first bonding portion is bonded to the second bonding portion, and the third bonding portion is adhered to the bottom plate to prevent light from being emitted from the first bonding portion and the second bonding portion through the second hole toward the button module.

In one embodiment, the bottom plate has a convex portion. When the button module is disposed above the backlight module, the convex portion protrudes into the first hole, and the third bonding portion at least partially adheres to the convex portion of the bottom plate.

In one embodiment, the third bonding portion is at least partially bonded to the bottom end of the convex portion of the bottom plate.

In one embodiment, the bottom plate has a hole. When the button module is disposed above the backlight module, the hole corresponds to the first hole, and the third bonding portion and the bottom plate are adhered to the surface of the surrounding portion of the hole.

In one embodiment, the bonding strength between the bottom plate and the third bonding portion is greater than the bonding strength between the first bonding portion and the second bonding portion.

In one embodiment, the light shielding sheet includes a plurality of light transmitting portions, and the plurality of light transmitting portions are disposed corresponding to the plurality of key units, so that the light guiding light guided by the light guiding plate is respectively emitted to the plurality of key units through the plurality of light transmitting portions.

In one embodiment, the reflective sheet is more easily deformed than the light shielding sheet.

In another embodiment, the present invention provides an illuminated keyboard comprising a button module and the backlight module described above.

In an embodiment, the bottom plate of the button module is a metal plate.

Compared with the prior art, the illuminated keyboard and the backlight module thereof not only adhere to the hole edge of the light guide plate by the light shielding sheet and the reflection sheet, but also adhere to the bottom plate of the button module by the reflection sheet, and have secondary prevention. The effect of light leakage. Furthermore, the illuminating keyboard and the backlight module thereof have the characteristics of strong adhesive strength between the adhesive and the metal, and the reflective sheet is adhered to the metal bottom plate of the button module to further reduce the chance of opening the glue to improve the light leakage phenomenon.

1‧‧‧ illuminated keyboard

10‧‧‧Backlight module

100‧‧‧ holes

110‧‧‧Light source

120‧‧‧Light guide

122‧‧‧First hole

130‧‧ ‧ shading film

130a‧‧‧ shading pattern

132‧‧‧Second hole

134‧‧‧First Fit

136‧‧‧Transmission Department

140‧‧‧reflector

142‧‧‧ third hole

144‧‧‧Second Placing Department

146‧‧ Third Third Department

150‧‧‧Adhesive materials

20‧‧‧Key Module

200‧‧‧ button unit

210‧‧‧floor

212‧‧‧ hole

214‧‧‧ convex

214a‧‧‧ bottom

220‧‧‧Key Cap

230‧‧‧Scissors

240‧‧‧ membrane switch

250‧‧‧ Elastomers

W1, W2, W3‧‧‧ aperture

FIG. 1 is a schematic diagram of a backlight module combined with a button module according to an embodiment of the present invention.

2A is a cross-sectional view showing a button unit of an illuminated keyboard according to an embodiment of the invention.

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

3A is a cross-sectional view showing a button unit of an illuminated keyboard according to another embodiment of the present invention.

Fig. 3B is a partial enlarged view of Fig. 3A.

4 is a schematic view of a light shielding sheet of a backlight module according to an embodiment of the invention.

The invention provides an illuminating keyboard and a backlight module thereof and a light guiding plate thereof to prevent light from leaking from the bonding of the backlight module diaphragm. The illuminated keyboard of the present invention can be applied to an illuminated keyboard of a notebook computer, but is not limited thereto.

As shown in FIG. 1 , in an embodiment, the illuminated keyboard 1 includes a backlight module 10 and a button module 20 , wherein the backlight module 10 is disposed under the button module 20 and has a plurality of holes 100 , such as heat dissipation holes and broken screws. Hole or recessed opening, etc. The position and number of the heat dissipation holes, the screw holes or the recessed openings may vary depending on the heat dissipation and configuration requirements of the applied electronic device (for example, a notebook computer), and are not limited to the examples. For example, the heat sink hole is generally closer to the heat source of the notebook computer and generally has a denser configuration. The button module 20 includes a plurality of button units 200 and a bottom plate 210, and the plurality of button units 200 are disposed on the bottom plate 210. Hereinafter, an embodiment of the illuminated keyboard and the backlight module thereof according to the present invention will be described in detail by taking a single button unit 200 as an example.

2A is a cross-sectional view showing a button unit of an illuminated keyboard according to an embodiment of the invention. As shown in FIG. 2A, in an embodiment, the button unit 200 is movably connected to the keycap 220 and the bottom plate 210 by the scissor support frame 230 to support the movement of the key cap 220, thereby compressing the elastic body 250 to trigger the membrane switch 240. And the button that is reset by the restoring force of the elastic body 250, but not limited thereto. The button unit 200 can be any suitable button unit having a light-transmissive keycap. In other embodiments, the scissor support frame 230 can be replaced by other lifting mechanisms, such as a butterfly wing support mechanism, a sliding block support mechanism, a cantilever support mechanism, etc., and the elastic body 250 can also be replaced by other recovery units, such as magnets, springs, and the like. . Furthermore, the membrane switch 240 can also be replaced with other switching units, such as mechanical switches, optical switches, and the like. In other words, the button unit 200 of the button module 20 can have any suitable structure. In order to achieve the trigger signal after pressing. Moreover, in this embodiment, the bottom plate 210 corresponds to the position of the hole 100 of the backlight module 10, and the hole 212 is opened to provide heat dissipation or to allow external fixing members (such as screws and pins) to be inserted.

2B is a partial enlarged view of FIG. 2A, and FIG. 2B shows only the backlight module 10 and the bottom plate 210 of the button module 20, and the components of the button unit 200 disposed on the bottom plate 210 are omitted (for example, the membrane switch 240, the elastic body) 250, scissors support frame 230 and key cap 220). As shown in FIG. 2A and FIG. 2B , in one embodiment, the backlight module 10 includes a light source 110 , a light guide plate 120 , a light shielding sheet 130 , and a reflection sheet 140 . The light source 110 provides light, and the light guide plate 120 directs light to be emitted toward a plurality of key units (for example, 200). The light shielding sheet 130 is disposed on one side (for example, above) of the light guide plate 120 and adjacent to the bottom plate 210. The light shielding sheet 130 has a light shielding pattern to selectively block or allow light to partially pass. The reflective sheet 140 is disposed on the other side (for example, the lower side) of the light guide plate 120 with respect to the light shielding sheet 130 , and is configured to reflect the light leaked from the lower surface of the light guide plate 120 back to the light guide plate 120 .

Specifically, the light source 110 is preferably a light emitting diode (LED), and particularly preferably a side emitting light emitting diode, but is not limited thereto. The light emitting surface of the light source 110 preferably faces the light incident surface of the light guide plate 120 so that the light passes through the light incident surface and is transmitted into the light guide plate 120. In one embodiment, the plurality of light sources 110 are preferably integrated into the circuit board to form an integrated light source unit, thereby improving assembly efficiency.

The light guide plate 120 can be used to receive light from the light source 110, wherein the light guide plate 120 has a first hole 122. In this embodiment, the first hole 122 is preferably circular, but is not limited thereto. In other embodiments, the first aperture 122 can have any suitable geometry, such as square, rectangular, polygonal, etc., depending on the application. Light guide plate 120 can be a sheet or sheet made of any suitable optical material, such as an optical polymer. In this embodiment, the light guide plate 120 is a rectangular plate body, and The size is preferably corresponding to the size of the button module 20, but is not limited thereto. In this embodiment, the light incident surface of the light guide plate 120 is a side surface of the light guide plate 120, and the top surface of the light guide plate 120 serves as a light exit surface of the light guide plate 120. After entering the light guide plate 120 through the light incident surface, the light provided by the light source 110 substantially travels along the extending direction of the light guide plate 120, and travels to the light transmitting portion of the light shielding sheet 130 to be emitted.

The light shielding sheet 130 is disposed above the light guide plate 120 and has a light shielding pattern (for example, 130a shown in FIG. 4) to selectively block or allow light to pass therethrough. Specifically, the light shielding sheet 130 includes a plurality of light transmitting portions 136 , and the plurality of light transmitting portions 136 are disposed corresponding to the plurality of button units 200 such that the light guiding plate 120 guides the light to be emitted to the plurality of button units 200 through the plurality of light transmitting portions 136 . The light shielding sheet 130 is a light transmissive optical film (for example, a polyethylene terephthalate (PET)) and has a pattern on the film to shield a portion of the keyboard device that does not require light. For example, the light shielding sheet 130 may have a pattern corresponding to the relative position and contour of the plurality of keys on the keyboard, such that the gap between the adjacent keys is masked to prevent the light from passing, and the position corresponding to the plurality of keys is the light transmitting portion 136. Light can be allowed to pass through so that light can be ejected from the keycap 220. In one embodiment, the shape and size of the light shielding sheet 130 are preferably corresponding to the light guide plate 120.

The light shielding sheet 130 has a second hole 132 and a first bonding portion 134. The second hole 132 corresponds to the first hole 122. The first bonding portion 134 is disposed around the second hole 132 , and the vertical projection of the first bonding portion 134 on the light guide plate 120 is in the first hole 122 . For example, the position of the second hole 132 corresponds to the first hole 132, and the shape of the second hole 132 is preferably similar to the first hole 132, such as a circular shape. Moreover, the center (eg, center or centroid) of the second hole 132 is preferably aligned with the center of the first hole 122, and the aperture W2 of the second hole 132 is smaller than the aperture W1 of the first hole 122. As a result, the light shielding sheet 130 is around the second hole 132 and is exposed (or protruded) from the portion of the first hole 122 of the light guide plate 120 to form the first bonding portion 134. The first bonding portion 134 preferably surrounds the second hole 132 The distance between the first abutting portion 134 and the edge of the second hole 132 is preferably substantially equal. That is, the second hole 132 is a circular hole or a square hole. The first bonding portion 134 is a circular ring or a square ring having the same width around the second hole 132, but is not limited thereto. .

The reflection sheet 140 has a third hole 142 , a second bonding portion 144 , and a third bonding portion 146 . The third hole 142 corresponds to the first hole 122 and the second hole 132. The third bonding portion 146 is disposed around the third hole 142 and between the second bonding portion 144 and the third hole 142 . The vertical projection of the second bonding portion 144 and the third bonding portion 146 in the light guide plate 120 is in the first hole 122, and the vertical projection of the third bonding portion 146 in the light shielding film 130 is in the second hole 132.

Specifically, the reflective sheet 140 may be a reflective film formed of a reflective material (for example, a metal foil), or a reflective film coated with a reflective material or a plastic film doped with reflective particles (for example, PET doped with reflective particles). The reflective sheet formed by the diaphragm. The shape and size of the reflection sheet 140 are preferably corresponding to the light guide plate 120, and the ductility/deformability of the reflection sheet 140 is preferably larger than that of the light shielding sheet 130. That is, the reflection sheet 140 is preferably deformed more easily than the light shielding sheet 130, so that the reflection sheet 140 is more easily adhered. The position of the third hole 142 corresponds to the second hole 132 and the first hole 132, and the shape of the third hole 142 is preferably similar to the first hole 132, for example, a circular shape. Furthermore, the center of the third hole 142 (for example, the center or the center of the hole) is preferably aligned with the center of the first hole 122 and the second hole 132, and the hole W3 of the third hole 142 is smaller than the hole diameter W2 of the second hole 132. As a result, the reflective sheet 140 is around the third hole 142 and is exposed (or protruded) from the portion of the first hole 122 of the light guide plate 120 to form a bonding portion (ie, the second bonding portion 144 and the third bonding portion 146). ). Specifically, a portion of the reflective sheet 140 around the third hole 142 and exposed (or protruding) to the second hole 132 of the light shielding sheet 130 is a third bonding portion 146, and is exposed (or protruded) to the first hole 122 and The portion overlapping the first bonding portion 134 is the second bonding portion 144. The second bonding portion 144 and the third bonding portion 146 are preferably continuously disposed around the third hole 142, and the second bonding portion The distance between the 144/third abutment portion 146 and the edge of the third hole 142 is preferably substantially equal. For example, the third hole 142 is a circular hole or a square hole. The second bonding portion 144 / the third bonding portion 146 is a circular ring or a square ring of the same width that surrounds the third hole 142 and has the same ring thickness. Not limited to this. In other words, the second abutting portion 144 surrounds the third abutting portion 146 , and the third abutting portion 146 surrounds the third hole 142 .

As shown in FIG. 2B, when the light shielding sheet 130, the light guide plate 120 and the reflection sheet 140 are stacked, the second hole 132, the first hole 122 and the third hole 142 are in communication with each other to form the hole 100 of the backlight module 10. The adhesive material 150 (for example, water gel) may be applied to the bonding portions of the reflective sheet 130 (ie, the second bonding portion 144 and the third bonding portion 146) such that the first bonding portion 134 and the second bonding portion The joint 144 is bonded. When the backlight module 10 is assembled with the button module 20, an adhesive material (not shown) may be applied to the upper surface of the light shielding film 130, and the upper surface of the light shielding film 130 may be adhered to the lower surface of the bottom plate 210. The third bonding portion 146 can be bonded to the bottom plate 210 by the adhesive material 150. In other words, when the button module 20 is disposed above the backlight module 10, the hole 212 of the bottom plate 210 corresponds to the hole 100 of the backlight module 10 (consisting of the first hole 122, the second hole 132, and the third hole 142), the light shielding film The upper surface of the bottom surface of the hole 212 is bonded to the lower surface of the bottom portion 210 of the hole 212. Thereby, the light is prevented from being emitted from the first bonding portion 134 and the second bonding portion 144 through the second hole 132 toward the button module 20 . That is, the backlight module 10 of the present invention is bonded to the light shielding sheet 130 by the reflective sheet 140, and the light guide plate 120 is covered at the edge of the first hole 122 to prevent light from coming to the edge of the hole 122 of the light guide plate 120. The reflective sheet 140 is bonded to the light shielding sheet 130, and is further bonded to the bottom plate 210 by the reflective sheet 140 to cover the edge of the second hole 132, thereby further preventing light from the reflection sheet 140 and the light shielding sheet 130. The adhesion is emitted toward the second hole 132/first hole 122, and the second prevention of light leakage is achieved.

Furthermore, the bonding strength between the bottom plate 210 and the third bonding portion 146 is preferably greater than the bonding strength between the first bonding portion 134 and the second bonding portion 144. Specifically, the bottom plate 210 is preferably a metal plate such as an iron plate. Therefore, the bonding strength of the third bonding portion 146 and the metal base plate 210 by the adhesive material 150 is greater than the bonding strength between the first bonding portion 134 and the second bonding portion 144 of the light shielding film 130 formed by the plastic film. The adhesion between the reflective sheet 140 and the bottom plate 210 is not easily opened, and the light is prevented from being emitted from the side of the first hole 122 of the light guide plate 120 toward the adhesion of the reflective sheet 140 and the light shielding sheet 130.

3A is a cross-sectional view of a button unit of an illuminated keyboard according to another embodiment of the present invention, and FIG. 3B is a partial enlarged view of FIG. 3A. Similarly, FIG. 3B only shows the backlight module 10 and the bottom plate 210 of the button module 20, and omits the components of the button unit 200 disposed on the bottom plate 210 (for example, the membrane switch 240, the elastic body 250, the scissor support frame 230, and Key cap 220). As shown in FIG. 3A and FIG. 3B , the backlight module 10 includes a light source 110 , a light guide plate 120 , a light shielding sheet 130 , and a reflection sheet 140 . The light guide plate 120 has a first hole 122. The light shielding sheet 130 has a second hole 132 and a first bonding portion 134. The reflection sheet 140 has a third hole 142 , a second bonding portion 144 , and a third bonding portion 146 . The aperture W1 of the first hole 122 is larger than the aperture W2 of the second hole 132, and the aperture W2 of the second hole 132 is larger than the aperture W3 of the third hole 142. The vertical projection of the first bonding portion 134 , the second bonding portion 144 and the third bonding portion 146 in the light guide plate 120 is in the first hole 122 , and the vertical projection system of the third bonding portion 146 in the light shielding film 130 . In the second hole 132. It should be noted that the structural details of the light source 110, the light guide plate 120, the light shielding sheet 130, and the reflection sheet 140 can be referred to the related embodiments. This will not be repeated here.

In this embodiment, the bottom plate 210 has a convex portion 214. For example, the protrusion 214 may be a portion where the bottom plate 210 is convex downward, or may be a column that is inserted downward from the hole 212 of the bottom plate 210. Furthermore, depending on the practical application, the convex portion 214 may be a solid cylinder or a hollow cylinder or a boss. when When the button module 20 is disposed above the backlight module 10, the convex portion 214 extends into the first hole 122, and the upper surface of the light shielding film 130 is adhered to the lower surface of the bottom plate 210. The first bonding portion 134 and the second bonding portion 144 are 144. The third bonding portion 146 is adhesively bonded to the convex portion 214 of the bottom plate 210 at least partially. Specifically, the third bonding portion 146 is preferably at least partially bonded to the bottom end 214a of the convex portion 214 of the bottom plate 210. That is, the third bonding portion 146 is bonded to the bottom end surface of the convex portion 214 at least at the upper end surface. In another embodiment (not shown), the third bonding portion 146 is not only bonded to the bottom end 214a of the convex portion 214, but also bonded to the side wall and the bottom end 214a of the convex portion 214.

In addition, the third bonding portion 146 may be a discontinuous annular bonding portion to increase the adhesion convenience of the third bonding portion 146. Specifically, the third bonding portion 146 may form at least all the openings from the edge of the third hole 142 toward the second bonding portion 144 (for example, the radial direction), so that the third bonding portion 146 forms a completely discontinuous circle. The ring (ie, the slit extends from the edge of the third hole 142 to abut the second abutment 144) or a partially discontinuous circular ring (ie, the slit extends only from the edge of the third hole 142 to a portion of the third abutment 146) ), but not limited to this. In another embodiment, the slit may further extend to the second abutting portion 144 such that the second abutting portion 144 also forms a discontinuous annular abutting portion. Similarly, in another embodiment, the first bonding portion 134 can also form a discontinuous annular abutting portion by a slit.

It should be noted that before the light shielding sheet 130 is bonded to the reflective sheet 140, the second bonding portion 144 and the third bonding portion 146 of the reflective sheet 140 may have a predetermined shape by using an embossing or a convex embossing technique to improve adhesion. effectiveness. For example, as shown in FIG. 2B , the portion of the reflective sheet 140 adjacent to the bonding portion can be processed to have a multi-stepped step shape to facilitate coating the light guide plate 120 and bonding the first bonding portion 134 and the bottom plate 210 . As shown in FIG. 3B, the portion of the reflective sheet 140 adjacent to the bonding portion can be processed to have a convex and concave shape to facilitate coating the light guide plate 120 and bonding the first bonding portion 134 and the convex portion 214 of the bottom plate 210. But not limited to this.

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 (15)

A backlight module suitable for a button module, the button module includes a plurality of button units and a bottom plate, the plurality of button units are disposed on the bottom plate, the backlight module comprises: a light source to provide a light; a light guide plate The first light guide plate has a first hole, the light guide plate guides the light to the plurality of button units; a light shield is disposed on one side of the light guide plate and adjacent to the bottom plate, the light shield has a second hole and a first a first hole corresponding to the first hole, the first abutting portion is disposed around the second hole, and the first bonding portion is vertically projected in the first hole in one of the light guide plates; And a reflective sheet disposed on the other side of the light guide plate, the reflective sheet has a third hole, a second bonding portion and a third bonding portion, the third hole corresponding to the first a hole and a second hole, the third bonding portion is disposed around the third hole and between the second bonding portion and the third hole, the second bonding portion and the third bonding portion a vertical projection of one of the light guide plates is in the first hole And the third bonding portion is vertically projected in the second hole in the second hole, wherein the first bonding portion is bonded to the second bonding portion, and the third bonding portion is bonded to the bottom plate. The light is prevented from being emitted from the first bonding portion and the second bonding portion through the second hole toward the button module. The backlight module of claim 1, wherein the bottom plate has a convex portion, and when the button module is disposed above the backlight module, the convex portion extends into the first hole, and the third bonding portion At least partially bonded to the convex portion of the bottom plate. The backlight module of claim 2, wherein the third bonding portion is at least partially bonded to a bottom end of the convex portion of the bottom plate. The backlight module of claim 1, wherein the bottom plate has a hole, and when the button module is disposed above the backlight module, the hole corresponds to the first hole, and the third bonding portion and the bottom plate The surface of the surrounding portion of the hole is bonded. The backlight module of any one of claims 1 to 4, wherein the bonding strength between the bottom plate and the third bonding portion is greater than the bonding strength between the first bonding portion and the second bonding portion. The backlight module of claim 1, wherein the light shielding sheet comprises a plurality of light transmitting portions, wherein the plurality of light transmitting portions are disposed corresponding to the plurality of button units, so that the light guiding plate guides the light rays to pass through the plurality of light transmitting portions respectively The plurality of button units are emitted. The backlight module of claim 1, wherein the reflective sheet is more easily deformed than the light shielding sheet. An illuminated keyboard includes: a button module, comprising a plurality of button units and a bottom plate, wherein the plurality of button units are disposed on the bottom plate; and a backlight module disposed under the button module, the backlight module comprising: a light source, providing a light; a light guide plate having a first hole, the light guide plate guiding the light to be emitted toward the plurality of button units; a light shielding film disposed on one side of the light guide plate adjacent to the bottom plate, the light shielding film Having a second hole corresponding to the first hole, the first hole is disposed around the second hole and the first abutting portion is perpendicular to one of the light guide plates Projection is in the first hole; a reflective sheet is disposed on the other side of the light guide plate with respect to the light shielding sheet, the reflective sheet has a third hole, a second bonding portion and a third bonding portion, and the third hole corresponds to the first The second bonding portion is disposed around the third hole and between the second bonding portion and the third hole, and the second bonding portion and the third bonding portion are disposed in the hole and the second hole a vertical projection of the light guide plate is in the first hole, and the third bonding portion is vertically projected in the second hole in the second hole, wherein the first bonding portion and the second bonding portion The third bonding portion is bonded to the bottom plate to prevent light from being emitted from the first bonding portion and the second bonding portion through the second hole toward the button module. The illuminating keyboard of claim 8, wherein the bottom plate has a convex portion, and when the button module is disposed above the backlight module, the convex portion protrudes into the first hole, and the third bonding portion is at least Partially bonded to the convex portion of the bottom plate. The illuminated keyboard of claim 9, wherein the third bonding portion is at least partially bonded to the bottom end of the convex portion of the bottom plate. The illuminating keyboard of claim 8, wherein the bottom plate has a hole, and when the button module is disposed above the backlight module, the hole corresponds to the first hole, and the third bonding portion and the bottom plate are The surface of the surrounding portion of the hole is bonded. The illuminating keyboard according to any one of claims 8 to 11, wherein the bonding strength between the bottom plate and the third bonding portion is greater than the bonding strength between the first bonding portion and the second bonding portion. The illuminated keyboard of claim 12, wherein the bottom plate is a metal plate. The illuminating keyboard of claim 8, wherein the visor comprises a plurality of light transmitting portions, the plurality of light transmitting portions are disposed corresponding to the plurality of button units, so that the light guiding plate guides the light through the plurality of light transmitting The parts are respectively emitted toward the plurality of button units. The illuminated keyboard of claim 8, wherein the reflective sheet is more deformable than the light shielding sheet.