TWI555051B - Backlight module, and lighting keyboard - Google Patents

Description

Light-emitting module and illuminated keyboard

The invention relates to a light-emitting module and an illuminated keyboard, in particular to a light-emitting module and an illuminated keyboard capable of reducing the halo phenomenon generated during illumination.

Please refer to FIG. 1 , which illustrates an exploded view of a conventional illuminated keyboard. As shown in FIG. 1 , the composition of the light-emitting keyboard 1 may include a button group 20 and a light-emitting module 30 from top to bottom, wherein the button group 20 has a plurality of light-transmitting keycaps 22 made of a light-transmitting material and A visor 24 is provided. In general, the light-emitting module 30 can have a plurality of light-emitting elements 32, and the light-emitting elements 32, which are light source of the light-emitting keyboard, generally select a light-emitting diode (LED). The light guide plate 33 of the light-emitting module 30 collects the light emitted by the light-emitting element 32, and then emits light to the button group 20 after being guided and scattered by the light guide plate 33. In addition, the light shielding plate 24 is disposed above the light guide plate 33, and a light transmission hole 26 is disposed corresponding to each of the light transmission key caps 22, and light guided inside the light guide plate 33 can be transmitted through the respective light transmission holes 26 to the corresponding transparent The light key cap 22 allows the identification symbol of the light-transmitting keycap 22 to emit light.

Please refer to FIG. 2a and FIG. 2b. FIG. 2a is a top view of the lighting module of the illuminated keyboard of FIG. 1. Figure 2b is a cross-sectional view of the lighting module of Figure 2a taken along section line 2-2'. As shown in Figure 2a and Figure 2b, the conventional hair The optical module 30 includes a circuit board 31, a light-emitting element 32, a colloid 35, a reflective layer 34, and a light guide plate 33 from bottom to top. The actual position of the light-emitting element 32 of the conventional light-emitting module 30 fixed on the circuit board 31 tends to have a certain degree of offset error from the original design predetermined position, so that the receiving hole 33a of the light guide plate 33 and the reflective layer 34 are The hole 34a needs to have enough space for the installation, so that the position-shifted light-emitting element 32 can be smoothly penetrated. Thus, there is a gap between the accommodating hole 33a of the light guide plate 33 and the corresponding illuminating element 32. Because of the gap, the light emitted from the light emitting surface 32a of the illuminating element 32 is partially scattered in the air and transmitted to the non-genuine. At the portion of the light incident surface 33b of the light guide plate 33, light energy loss such as scattering occurs, so that the light intensity of the light guide plate 33 actually received by the light-emitting element 32 is not as strong as that of the actual light-emitting element 32, and further affects The overall illumination effect of the illuminated keyboard 1.

Therefore, how to solve the problem of light energy loss caused by the gap between the light guide plate 4 and the light-emitting element 2 to improve the overall light-emitting effect of the light-emitting keyboard is a technical issue that the industry needs to overcome.

The invention provides a light-emitting module and an illuminated keyboard, so as to reduce the halo phenomenon generated during illumination and the problem of light-emitting energy consumption.

An embodiment of the present invention provides a light emitting module including a circuit board, a light emitting unit, a light transmitting adhesive layer, a light guiding plate, and a reflective layer. The light emitting unit is disposed on the circuit board, and the light emitting unit has a light emitting surface for emitting a light. The light-transmitting adhesive layer has a first bonding portion and a second bonding portion, wherein the first bonding portion has opposite first and second faces, and the second bonding portion has opposite third and fourth faces, the first bonding portion The first surface of the second bonding portion is adhered to the light emitting surface of the light emitting unit. The light guide plate has a light incident surface for receiving light transmitted through the second bonding portion. The light incident surface faces the light emitting surface of the light emitting unit, and the light incident surface of the light guide plate is adhered to the fourth surface of the second bonding portion. reflection The layer is disposed under the light guide plate and the bottom surface of the reflective layer is bonded to the second surface of the first bonding portion.

In another embodiment of the present invention, an illuminated keyboard includes a light emitting module and a button set. The light emitting module comprises a circuit board, a light emitting unit, a light transmissive glue layer, a light guide plate and a reflective layer. The light emitting unit is disposed on the circuit board, and the light emitting unit has a light emitting surface for emitting light. The light-transmitting adhesive layer has a first bonding portion and a second bonding portion, wherein the first bonding portion has opposite first and second faces, and the second bonding portion has opposite third and fourth faces, The first surface of the bonding portion is disposed on the circuit board, and the third surface of the second bonding portion is adhered to the light emitting surface of the light emitting unit. The light guide plate has a light incident surface for receiving light transmitted through the second bonding portion, the light incident surface faces the light emitting surface of the light emitting unit, and the light incident surface of the light guide plate is adhered to the fourth surface of the second bonding portion. The reflective layer is disposed under the light guide plate, and the bottom surface of the reflective layer is bonded to the second surface of the first bonding portion. The button group is disposed on the light-emitting module, the button group has a plurality of key caps, and each of the key caps has a light-transmitting portion, wherein the light is transmitted through the light guide plate to emit light from the light-transmitting portion.

In still another embodiment of the present invention, a light emitting module includes a circuit board, a light emitting unit, a second bonding portion, a light guiding plate, and a reflective layer. The board has a surface on the board. The light emitting unit is disposed on the circuit board, and the light emitting unit has a light emitting surface, and the light emitting surface emits light, and the light emitting surface has a first angle with the surface of the circuit board. The second bonding portion has a third surface and a fourth surface, and the third surface of the second bonding portion is bonded to the light emitting surface of the light emitting unit. The light guide plate is disposed above the circuit board, the light guide plate has a light incident surface, the light incident surface faces the light exit surface, and the light incident surface is adhered to the fourth surface of the second glue portion, and the light passes from the third surface into the second glue joint portion, and the light is transmitted from the third surface to the second glue portion. The fourth side is emitted and enters the entrance surface. The reflective layer is disposed between the light guide plate and the circuit board. The reflective layer has a top surface, a broken hole and a bottom surface. The light emitting unit protrudes upward through the hole and protrudes from the top surface of the reflective layer, and the bottom surface of the reflective layer is disposed on the circuit board.

The light emitting module in the embodiment of the invention mainly uses the second glue The merging portion is connected to the light incident surface of the light guide plate and the light emitting surface of the light emitting unit, so that the light of the light emitting unit can be completely transmitted into the light guide plate through the second bonding portion to prevent the light from being scattered in the air to generate a halo phenomenon, and at the same time The problem that the emitted light travels in the air and causes scattering to cause energy loss can be avoided. Therefore, the embodiment of the present invention can improve the problem that the light energy of the light of the light-emitting unit cannot be completely transmitted to the light guide plate. Therefore, the light guide plate of the light-emitting module of the embodiment of the invention can receive the light intensity of the light-emitting unit to meet the light-emitting intensity of the light-emitting unit, thereby improving the overall light-emitting effect of the light-emitting module, and can be further applied to the light-emitting keyboard or other light-emitting products.

1‧‧‧ illuminated keyboard

20‧‧‧ button group

22‧‧‧Key Cap

24‧‧ ‧ visor

26‧‧‧Light hole

30‧‧‧Lighting module

31‧‧‧ boards

32‧‧‧Lighting unit

32a‧‧‧Glossy

33‧‧‧Light guide plate

33a‧‧‧ accommodating holes

33b‧‧‧Into the glossy

34‧‧‧reflective layer

136b‧‧‧ bottom

140‧‧‧Light guide plate

140a‧‧‧ accommodating holes

140b‧‧‧Glossy

141a‧‧‧Right group

141b‧‧‧Left group

142‧‧‧ bottom

144‧‧‧ top surface

150‧‧‧reflective layer

150a‧‧‧ hole

152‧‧‧ top surface

154‧‧‧ bottom

34a‧‧‧Breaking

35‧‧‧ colloid

10‧‧‧ illuminated keyboard

100‧‧‧Lighting module

110‧‧‧Circuit board

112‧‧‧ Board surface

120‧‧‧Lighting unit

120a‧‧‧ top

122‧‧‧Glossy surface

122a‧‧‧ top side

130‧‧‧Transparent adhesive layer

132‧‧‧First Gluing Department

134‧‧‧Second Glue

136‧‧‧ Third Gluing Department

156‧‧‧ side

200‧‧‧ button group

210‧‧‧Key Cap

220‧‧ ‧ visor

222‧‧‧Light hole

Θ1‧‧‧ first angle

Θ2‧‧‧second angle

I1‧‧‧ distance

The description of the present invention and other objects, features, advantages and embodiments will be more apparent and understood. FIG. 1 is an exploded view of a conventional illuminated keyboard.

2a is a top view of the lighting module of the illuminated keyboard of FIG. 1.

Figure 2b is a cross-sectional view of the lighting module of Figure 2a taken along section line 2-2'.

3 is an exploded view of an illuminated keyboard in accordance with an embodiment of the present invention.

4 is a top view of a portion A of the illuminated keyboard in accordance with FIG.

Figure 5 is a cross-sectional view of portion A of the illuminated keyboard of Figure 4 taken along section line 5-5'.

6A-6C are flowcharts showing the manufacture of a lighting module of an illuminated keyboard according to still another embodiment of the present invention.

FIG. 7 is a top view of a lighting module according to the illuminated keyboard of FIG. 6B.

Please refer to FIG. 3, which is an exploded view of an illuminated keyboard in accordance with an embodiment of the present invention. As shown in FIG. 3, the illuminating keyboard 10 of the present embodiment includes a illuminating module 100 and a button set 200. The button set 200 has a plurality of key caps 210 and a visor 220. The keycap 210 can be disposed on the visor 220. The light shielding plate 220 has a plurality of light transmission holes 222, and each of the key caps 210 has a light transmitting portion (not shown), and the light transmitting portions respectively correspond to the light transmission holes 222. In addition, the light emitting module 100 can emit light toward the button group 200, that is, the light can be transmitted through the light guide plate 140 of the light emitting module 100 to penetrate the light transmission hole 222 of the light shielding plate 220 from each of the key caps 210. The light transmitting portion emits light. Since each of the keycaps 210 can be provided with a corresponding identification symbol in the light transmitting portion thereof, the light can be emitted from the light transmitting portion of the keycap 210 by the light, so that the corresponding identification symbol is displayed on the light transmitting portion, and the user can be in a dim environment. Each keycap 210 on the button set 200 is identified.

4 and FIG. 5, FIG. 4 is a top view of a portion A of the illuminated keyboard according to FIG. Figure 5 is a cross-sectional view of portion A of the illuminated keyboard of Figure 4 taken along section line 5-5'. As shown in FIG. 3 to FIG. 5 , in the embodiment, the light emitting module 100 can include a circuit board 110 , a light emitting unit 120 , a light transmitting adhesive layer 130 , a light guiding plate 140 , and a reflective layer 150 . The light emitting unit 120 is disposed on the circuit board 110. The light guide plate 140 is disposed on the reflective layer 150. The light transmitting adhesive layer 130 is disposed between the reflective layer 150 and the circuit board 110 and adheres to each other. It extends between the light guide plate 140 and the light emitting unit 120 and bonds the two to each other.

In detail, the light emitting unit 120 is disposed on the circuit board surface 112 of the circuit board 110. The light emitting unit 120 has a light emitting surface 122 having a flat surface, and the light is emitted from the light emitting surface 122. The light emitting surface 122 and the circuit board surface 112 are disposed. It has a first angle θ1. In detail, the light emitting unit 120 of the present embodiment is a light emitting diode (LED), and the light emitting surface 122 of the general light emitting diode is a long side of the light emitting diode package, and the light emitting surface 122 and the light emitting unit 120 The intersection of the top surface 120a is the top surface 122a of the light-emitting surface, but is not limited thereto. another In this embodiment, the first angle θ1 formed by the light-emitting surface 122 and the surface 112 of the circuit board may be 90 degrees, but is not limited thereto.

In this embodiment, the light-emitting unit 120 has a plurality of light-emitting units 120, and the light-guiding plate 140 has a plurality of receiving holes 140a and the reflective layer 150 has a plurality of holes 150a. The positions of the receiving holes 140a and the holes 150a correspond to each other; When the bottom surface 142 of the light plate 140 is connected to the top surface 152 of the reflective layer 150, the receiving hole 140a and the broken hole 150a communicate with each other. As such, when the bottom surface 154 of the reflective layer 150 is disposed on the circuit board surface 112 of the circuit board 110, the light emitting unit 120 can protrude upward through the broken hole 150a on the top surface 152 of the reflective layer 150 and be accommodated in the guide. The light receiving plate 140 has a corresponding receiving hole 140a. In this embodiment, the receiving holes 140a that communicate with each other have the same size and shape as the broken holes 150a, but are not limited thereto. At the same time, the light-receiving surface 140b is disposed in the accommodating hole 140a of the light guide plate 140, and the light-incident surface 140b faces the light-emitting surface 122 of the corresponding light-emitting unit 120.

In this embodiment, the number of the light emitting units 120 of the light emitting module 100 is plural, but not limited thereto. In other embodiments, the number of the light emitting units 120 of the light emitting module 100 may be only one. The invention has been implemented.

In detail, returning to FIG. 3, the accommodating hole 140a is disposed at an intermediate portion of the light guide plate 140, and the accommodating hole 140a is divided into a right group 141a (the three accommodating holes 140a shown in FIG. 3 belong to the right group) Group) and the left group 141b (the three housing holes 140a shown in FIG. 3 belong to the left group). In general, the accommodating hole 140a belonging to the left group 141b is located to the left of the accommodating hole 140a belonging to the right group 141a. At the same time, the light-emitting surface 122 of the light-emitting unit 120 located in the accommodating hole 140a of the left group 141b is substantially directed toward the left side of the entire left group 141b, and is located in the light-emitting unit 120 in the accommodating hole 140a of the right group 141a. The light-emitting surface 122 is substantially directed toward the right of the entire right group 141a. That is, the light-emitting surface 122 of the light-emitting unit 120 located in the left group 141b and the light-emitting surface 122 of the light-emitting unit 120 located in the right group 141a are opposite to each other.

Referring to FIG. 4 and FIG. 5 again, the light transmissive adhesive layer 130 has a first glue portion 132 extending substantially horizontally and a second glue portion 134 extending substantially vertically, wherein the first glue portion 132 has an opposite first surface (bottom surface) 132a and second surface (top surface) 132b, the second bonding portion 134 has a third surface (right side surface) 134a and a fourth surface (left side surface) 134b. In this embodiment, the first surface 132a of the first bonding portion 132 is adhered to the circuit board surface 112 of the circuit board 110, and the second surface 132b of the first bonding portion 132 is adhered to the bottom surface 154 of the reflective layer 150. Therefore, the first bonding portion 132 is bonded to the reflective layer 150 and the circuit board 110, and the light emitting unit 120 can be fixedly disposed in the receiving hole 140a of the light guide plate 140. At the same time, the top surface 120a of the light-emitting unit 120 is substantially aligned with the top surface 144 of the light-emitting board 140, so that most of the light emitted by the light-emitting unit 120 can smoothly enter the light guide plate 140.

At the same time, the third surface 134a of the second bonding portion 134 is completely adhered to the light emitting surface 122 of the light emitting unit 120, and the fourth surface 134b of the second bonding portion 134 can be completely adhered to the light incident surface 140b of the light guide plate 140. In this embodiment, the first bonding portion 132 and the second bonding portion 134 can be connected to each other, so that the fourth surface 134b of the second bonding portion 134 can be adhered to the light incident surface 140b of the light guide plate 140 and the side surface 156 of the reflective layer 150. , but not limited to this. In other embodiments, the reflective layer 150 and the circuit board 110 can also be fixed by thermal fusion, such that the first bonding portion 132 can be omitted, and the light emitting module 100 can only be provided with the second bonding portion 134 as long as the fourth surface thereof 134b is bonded to the light incident surface 140b of the light guide plate 140 and the third surface 134a is adhered to the light exit surface 122 of the light emitting unit 120. The present invention can be implemented, but not limited thereto.

In this embodiment, the transparent adhesive layer 130 can be a double-sided tape of a polyester substrate, but is not limited thereto. In addition, the thickness of the second bonding portion 134 may be 0.18 mm to 0.2 mm. In a preferred embodiment, the thickness of the second bonding portion 134 may be 0.16 mm to 0.2 mm, but not limited thereto. On the other hand, the shortest linear distance I1 between the light-emitting surface 122 of the light-emitting unit 120 and the light-incident surface 140b of the light guide plate 140 It can be 0.18mm~0.2mm. In other words, the thickness of the second bonding portion 134 can substantially fill the gap between the light emitting surface 122 and the light incident surface 140b, so that the third surface 134a and the fourth surface 134b of the second bonding portion 134 can be closely adhered respectively. The corresponding light emitting surface 122 and the light incident surface 140b.

In addition, the refractive index of the second bonding portion 134 of the present embodiment is preferably greater than the refractive index 1 of the air and less than or equal to the refractive index of the light guide plate 140 of 1.55. In a preferred embodiment, the refractive index of the second bonding portion 134 ranges from greater than 1.4 and less than or equal to the refractive index of the light guide plate 140 of 1.55. Therefore, the light emitted from the light-emitting unit 120 can smoothly enter the second bonding portion 134 and smoothly enter the light guide plate 140 at the boundary between the fourth surface 134b of the second bonding portion and the light-incident surface 140b of the light guide plate 140. The light emitted by the light emitting unit 120 can be prevented from being diverged in several directions before being exposed to the air before entering the light guide plate 140, causing a halo phenomenon and causing loss of light energy of the light entering the light guide plate 140.

In this embodiment, the transparent adhesive layer 130 may further include a third bonding portion 136, the third bonding portion 136 is connected to the top of the second bonding portion 134, and the third bonding portion 136 is adhered to a portion of the top surface 120a of the light emitting unit 120. . As shown in FIG. 4, the X-axis length of the third bonding portion 136 that covers and adheres to the top surface 120a of the light emitting unit may be smaller than the X-axis length of the top surface 120a of the light emitting unit 120. Since the third bonding portion 136 is formed by bending upwardly from the second bonding portion 134, when the third bonding portion 136 is adhered to the top surface 120a of the partial light emitting unit 120, the second bonding portion 134 can be surely extended upwardly. The light-emitting surface top side 122a of the light-emitting surface 122 of the light-emitting unit 120, that is, the third surface 134a of the second bonding portion 134 is ensured to be bonded to all of the light-emitting surfaces 122 of the light-emitting unit.

On the other hand, although the second bonding portion 134 absorbs the energy of a portion of the light, the second bonding portion 134 can guide most of the light into the light guide plate 140 via the second bonding portion 134 to prevent the light from being dissipated into the air. . According to the relevant experimental measurement, the brightness in the light guide plate 140 of the light-emitting module 100 in which the second bonding portion 134 is disposed is compared with the light-emitting mode in which the second bonding portion is not provided. The brightness of the light guide of the group is 8% higher.

6A-6C are flowcharts showing the manufacturing process of the light emitting module 100 of the illuminated keyboard according to still another embodiment of the present invention.

As shown in FIG. 6A, the light emitting unit 120 is disposed on the circuit board surface 112 of the circuit board 110, wherein the light emitting surfaces 122 of the two light emitting units 120 are opposite to each other.

As shown in FIG. 6B and FIG. 7 , (1) the release layer of the lower surface of the transparent adhesive layer 130 is removed, and the lower surface of the first adhesive portion 132 of the transparent adhesive layer 130 is adhered to the surface of the circuit board 112. (2) applying pressure to the transparent adhesive layer 130 to deform it to have a first angle θ1, and bonding the second bonding portion 134 to the light-emitting surface 122 of the light-emitting unit 120; (3) continuing to apply pressure to the light-transmitting adhesive The layer 130 is deformed to have a second included angle θ2 to bond the third glued portion 136 to at least a portion of the top surface 120a of the light emitting unit 120. The first angle θ1 and the second angle θ2 are the angles formed by the outer shape of the light-transmitting layer 130 and the light-emitting surface 122 of the light-emitting unit 120 during the phase-by-stage bonding process. For example, if the light emitting surface 122 of the light emitting unit is perpendicular to the circuit board 110 and the top surface 120a, the first angle θ1 and the second angle θ2 may be 90 degrees, but not limited thereto. On the other hand, as can be seen from FIG. 7, the first bonding layer 132 is retracted into the circuit board 110, that is, when the first bonding layer 132 is bonded to the circuit board 110, the edge of the circuit board 110 portion is exposed to the first. The glue layer 132 is outside, but not limited to.

Then, as shown in FIG. 6C, the release layer of the upper surface of the transparent adhesive layer 130 is removed, and after the receiving hole 140a of the light guide plate 140 is aligned with the positive light emitting unit 120, the bottom surface 152 of the reflective layer 150 is adhered thereto. The second surface 132b of the first bonding portion 132 and the light incident surface 140b of the receiving hole 140a of the light guide plate 140 are adhered to the fourth surface 134b of the second bonding portion 134 to form the light emitting mode described in this embodiment. Group 100.

It will be apparent from the above-described embodiments of the present invention that the application of the present invention has the following advantages. The light-emitting module of the embodiment is mainly connected by a second glue joint. The light-incident surface of the light plate and the light-emitting surface of the light-emitting unit enable the light of the light-emitting unit to be completely transmitted into the light guide plate through the second glued portion, so as to avoid light scattering in the air to generate halo phenomenon, and at the same time avoid being emitted. The problem that the light travels in the air and causes scattering to cause energy loss is that the embodiment of the present invention can improve the problem that the light energy of the light of the light-emitting unit cannot be completely transmitted to the light guide plate. Therefore, the light guide plate of the light-emitting module of the embodiment of the invention can receive the light intensity of the light-emitting unit to meet the light-emitting intensity of the light-emitting unit, thereby improving the overall light-emitting effect of the light-emitting module, and can be further applied to the light-emitting keyboard or other light-emitting products.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

10‧‧‧ illuminated keyboard

100‧‧‧Lighting module

110‧‧‧Circuit board

120‧‧‧Lighting unit

130‧‧‧Transparent adhesive layer

140‧‧‧Light guide plate

200‧‧‧ button group

210‧‧‧Key Cap

220‧‧ ‧ visor

222‧‧‧Light hole

Claims (17)

A light-emitting module includes: a circuit board; a light-emitting unit disposed on the circuit board, the light-emitting unit has a light-emitting surface for emitting a light; a light-transmitting adhesive layer having a first glued portion and a a second bonding part, wherein the first bonding part has a first surface and a second surface, the second bonding part has a third surface and a fourth surface, and the first bonding part The third surface of the second bonding portion is adhered to the light emitting surface of the light emitting unit, and the light guiding plate has a light incident surface for receiving the light passing through the second bonding portion. The light incident surface faces the light emitting surface of the light emitting unit, and the light incident surface of the light guide plate is adhered to the fourth surface of the second bonding portion; and a reflective layer is disposed under the light guiding plate And the bottom surface of the reflective layer is adhered to the second surface of the first bonding portion. The light-emitting module of claim 1, wherein the second bonding portion has a thickness of 0.18 mm to 0.2 mm. The light-emitting module of claim 1, wherein the light-transmitting adhesive layer further comprises a third bonding portion connected to the second bonding portion, and the third bonding portion is adhered to a portion of the top surface of the light-emitting unit. The illuminating module of claim 1, wherein the second bonding portion has a refractive index ranging from greater than 1 and less than or equal to a refractive index of the light guiding plate. The illuminating module of claim 1, wherein the second bonding portion has a refractive index in a range of more than 1.4 and less than or equal to a refractive index of the light guiding plate. The illuminating module of claim 1, wherein the second bonding portion has a refractive index ranging from greater than 1.4 and less than or equal to 1.55. The illuminating module of claim 1, wherein a top surface of the illuminating unit is substantially aligned with a top surface of the light guiding plate. The light-emitting module of claim 1, wherein the shortest linear distance between the light-emitting surface of the light-emitting unit and the light-incident surface of the light guide plate is 0.18 mm to 0.2 mm. The illuminating module of claim 1, wherein the second bonding portion has a thickness of 0.16 mm to 0.2 mm. The light-emitting module of claim 1, wherein the light-transmitting adhesive layer is a double-sided adhesive tape of a polyester substrate. An illuminated keyboard includes: a light emitting module comprising: a circuit board; a light emitting unit disposed on the circuit board, the light emitting unit having a light emitting surface for emitting a light; and a light transmissive layer having each other a first glued portion and a second glued portion, wherein the first glued portion has a first surface and a first surface The second surface of the second bonding portion has a third surface and a fourth surface. The first surface of the first bonding portion is disposed on the circuit board, and the third surface of the second bonding portion is bonded. a light-emitting surface of the light-emitting unit; a light-guide plate having a light-incident surface for receiving the light transmitted through the second glue portion, the light-incident surface facing the light-emitting surface of the light-emitting unit, and the guide The light incident surface of the light plate is adhered to the fourth surface of the second glue portion; and a reflective layer is disposed under the light guide plate, and a bottom surface of the reflective layer is adhered to the second surface of the first glue portion; And a button set is disposed on the light emitting module, the button set has a plurality of key caps, and each of the key caps has a light transmitting portion, wherein the light is transmitted through the light guide plate to emit light from the light transmitting portions. A light-emitting module includes: a circuit board having a circuit board surface; a light-emitting unit disposed on the circuit board, the light-emitting unit having a light-emitting surface, the light-emitting surface emitting a light, the light-emitting surface The second adhesive surface has a third surface and a fourth surface, and the third surface of the second adhesive portion is bonded to the light emitting unit. a light-emitting surface; a light guide plate disposed above the circuit board, having a light-incident surface, the light-incident surface facing the light-emitting surface, the light-incident surface being adhered to the fourth surface of the second glue portion, the light The third surface enters the interior of the second bonding portion, and is emitted from the fourth surface into the light incident surface; a reflective layer is disposed between the light guide plate and the circuit board, the reflective layer has a top surface, a hole and a bottom surface, the light emitting unit protrudes upwardly from the top surface of the reflective layer through the hole, and a bottom surface of the reflective layer is disposed on the circuit board; a first bonding portion, the first bonding portion has a first surface and a second surface, the first surface of the first bonding portion is adhered to the circuit board, and the second surface of the first bonding portion is bonded The reflective layer is fixed to the circuit board by the first bonding portion on the bottom surface of the reflective layer. The illuminating module of claim 12, wherein the first bonding portion and the second bonding portion are connected to each other to form a light transmissive layer, the first bonding portion extends substantially horizontally, and the second bonding portion The portion extends substantially vertically such that the light transmissive layer has an L-shaped cross section. The illuminating module of claim 13, wherein the first bonding portion of the transparent adhesive layer is adhered to the surface of the circuit board, and the first bonding portion of the transparent adhesive layer is bonded to the second bonding portion. The first angle is between the portions, and the second glue portion is adhered to the light-emitting surface. The illuminating unit of claim 13 , wherein the illuminating unit has a top surface, the top surface has a second angle with the light-emitting mask, and the illuminating module further has a third bonding portion. The third glued portion extends upward from the second bonding portion, and the third bonding portion is adhered to a portion of the top surface of the light emitting unit, thereby ensuring that the second bonding portion can completely cover the light emitting surface. The light-emitting module of claim 15, wherein the first glued portion, the second glued portion and the third glued portion are connected to each other to form a light-transmitting adhesive layer, the light-transmitting adhesive layer The first bonding portion is adhered to the surface of the circuit board, the first bonding portion of the transparent adhesive layer and the second bonding portion have the first angle, and the second bonding portion is adhered to the light emitting surface, The second adhesive portion of the light-transmitting adhesive layer and the second adhesive portion have the second angle, and the third adhesive portion is adhered to the top surface of the light-emitting unit. The illuminating module of claim 12, wherein the second bonding portion has a refractive index range greater than 1. and less than or equal to a refractive index of the light guiding plate, or a refractive index range of the second bonding portion. It is greater than 1.4 and less than or equal to the refractive index of the light guide plate, or the refractive index of the second adhesive portion is greater than 1.4 and less than or equal to 1.55.