TW201931409A - Backlight module and luminescent keyboard including the same - Google Patents

Abstract

The present invention provides a backlight module of a luminescent keyboard, including a first light guide plate, a second light guide plate, a circuit layer and a first light source and a second light source disposed on the circuit layer. The first light guide plate has a first light incident surface and a first side surface opposite to the first light incident surface, and a first light exit surface and a first bottom surface opposite to the first light exit surface; and the second light guide plate separated from the first light guide plate has a second light incident surface and a second side surface opposite to the second light incident surface, and a second light exit surface and a second bottom surface opposite to second light exit surface. The first light incident surface and the second light incident surface face each other, the circuit layer is disposed across the first light incident surface and the second light incident surface, and the first light source and the second light source respectively emit light toward the first light incident surface and the second light incident surface. In said backlight module, the thickness of the first light guide plate at the first light incident surface is greater than the thickness of the first light guide plate at the first side surface, and the thickness of the second light guide plate at the second light incident surface is greater than the thickness of the second light guide plate at the second side surface.

Description

Backlight module and illuminated keyboard including the same

The invention relates to a backlight module and an illuminated keyboard comprising the same. Specifically, the present invention relates to a backlight module in which a light incident surface of a light guide plate is disposed inside a backlight module, and an illuminated keyboard including the same.

With the advent of the information age, keyboards as input devices for electronic devices or display devices have become more popular. Therefore, the operability and appearance of the keyboard have become more and more important. In order to improve the visibility of the keyboard under low-light illumination and/or to improve or change the visual effect of the keyboard, a backlight module may be disposed on the back of the keyboard to achieve illumination through the keyboard.

According to the limitation of the process mold and the like, in the backlight module, the light incident surface of the light guide plate is generally disposed at the edge of the backlight module, so that the light emitted by the light source disposed around the backlight module can be introduced into the overall backlight mode. Group or keyboard. However, the ability to introduce the amount of light inside the backlight module from the periphery of the backlight module is smaller as the size of the overall backlight module and the keyboard is larger, and the length of the light source and the circuit layer that need to be matched with the light surface is also Backlight module and keyboard size The larger and longer, the higher the cost of setting the light source and circuit layer. In addition, the keyboard module or device that can be used to assemble such a backlight module is also limited by the preset position of the light source and the circuit layer. Therefore, it is necessary to develop a backlight module that can be more flexibly freely configured.

To solve the above problems, an embodiment of the present invention provides a backlight module of an illuminated keyboard. The backlight module includes a first light guide plate having a first light incident surface, a first light emitting surface, a first bottom surface, and a first side surface, wherein the first light emitting surface is opposite to the first bottom surface, and the first The light incident surface and the first side surface respectively adjoin the first light emitting surface and the first bottom surface and are located between the first light emitting surface and the first bottom surface; the second light guiding plate is disposed apart from the first light guiding plate and has a first a second light incident surface, a second light emitting surface, a second bottom surface and a second side surface, wherein the second light emitting surface is opposite to the second bottom surface, and the second light incident surface and the second side surface are respectively adjacent to the second light emitting surface and the second bottom surface Located between the second light-emitting surface and the second bottom surface; the circuit layer is disposed across the first light-incident surface and the second light-incident surface; the plurality of first light sources are disposed on the circuit layer and Illuminating toward the first light incident surface; and a plurality of second light sources disposed on the circuit layer and emitting light toward the second light incident surface. The first light incident surface and the second light incident surface face each other on the adjacent side of the first light guide plate and the second light guide plate. The thickness of the first light guide plate on the first light incident surface is greater than the thickness on the first side surface, and the thickness of the second light guide plate on the second light incident surface is greater than the thickness on the second side surface.

According to another embodiment of the present invention, an illuminated keyboard including the above backlight module and a button module located on the backlight module is provided. The button module includes a substrate and a plurality of buttons, and the light provided by the backlight module can be emitted from a plurality of buttons.

The backlight module and the illuminated keyboard provided by the embodiment of the present invention can improve the configuration and assembly flexibility of the backlight module and the illuminated keyboard by using the configuration of the composite light guide plate, thereby reducing the mold opening and/or setting the light source or The cost of the circuit layer, and may avoid or reduce the defects of light loss or deficiency caused by the introduction of the backlight module from the surrounding light.

10, 20, 30, 40, 50, 60, 70, 80, 90, 91, 93, 400, 500, 600, 700, 800, 800' ‧ ‧ backlight module

12, 14, 32, 42, 62, 64, 72, 82‧‧‧ initial light guide

32', 42', 72', 82' ‧ ‧ intermediate structure

15, 25‧‧‧ structure

15_1‧‧‧Part 1

15_1’‧‧‧First Area

15_2‧‧‧Part II

15_2’‧‧‧Second area

100‧‧‧First light guide

110‧‧‧First protrusion

112‧‧‧ first side

114‧‧‧First light entry

116‧‧‧The first glazing

118‧‧‧ first bottom surface

119‧‧‧ first inclined surface

150‧‧‧ circuit layer

152‧‧‧First light source

154‧‧‧second light source

200‧‧‧Second light guide

212‧‧‧ second side

214‧‧‧Second entrance

216‧‧‧second glazing

218‧‧‧ second bottom surface

219‧‧‧Second inclined surface

220‧‧‧Second protrusion

250‧‧‧mask layer

300‧‧‧third light guide

300’‧‧‧Part III

300”‧‧‧ blocks

305‧‧‧ openings

305’‧‧‧ Block

315‧‧‧Light guide plate connection

350‧‧‧reflector

355‧‧‧ recess

900‧‧‧Key Module

905‧‧‧Optical microstructure

910‧‧‧Substrate

920‧‧‧film circuit layer

930‧‧‧Key Cap

952, 954‧‧ ‧ light source hole

1000, 2000, 3000, 4000‧‧‧ illuminated keyboard

L1, L2, L3, L4‧‧‧ rays

S1‧‧‧ first side

S2‧‧‧ second side

D1, D2, D3, D4, D5, D6, D7, D8, D9, D10‧‧‧ cutting lines

W1, W2, W3‧‧‧ width

P1‧‧‧ first side

P2‧‧‧ second side

F, G, H‧‧‧

1A is a plan view of a backlight module in accordance with a first embodiment of the present invention.

1B is a cross-sectional view of a backlight module in accordance with a first embodiment of the present invention.

1C and 1D are schematic views showing a process of preparing the backlight module shown in FIGS. 1A and 1B according to different embodiments of the present invention.

2A is a plan view of a backlight module in accordance with a second embodiment of the present invention.

2B is a cross-sectional view of a backlight module in accordance with a second embodiment of the present invention.

3A and 3B are schematic views showing a process of preparing a backlight module according to a third embodiment of the present invention.

3C is a plan view of a backlight module in accordance with a third embodiment of the present invention.

3D is a cross-sectional view of a backlight module in accordance with a third embodiment of the present invention.

4A and 4B are schematic views showing a process of preparing a backlight module according to fourth and fifth embodiments of the present invention.

4C and 4D are cross-sectional views of a backlight module according to fourth and fifth embodiments of the present invention, respectively.

Figure 5A is a plan view of a backlight module in accordance with a sixth embodiment of the present invention.

Figure 5B is a cross-sectional view of a backlight module in accordance with a sixth embodiment of the present invention.

5C and 5D are schematic views showing a process of preparing the backlight module shown in FIGS. 5A and 5B according to different embodiments of the present invention.

Figure 6A is a plan view of a backlight module in accordance with a seventh embodiment of the present invention.

Figure 6B is a cross-sectional view of a backlight module in accordance with a seventh embodiment of the present invention.

6C and 6D are schematic views showing a process of preparing the backlight module shown in FIGS. 6A and 6B according to an embodiment of the present invention.

7A and 7B are schematic views showing a process of fabricating a backlight module according to still another embodiment of the present invention.

Figure 7C is a plan view of a backlight module prepared by the process of Figures 7A and 7B in accordance with an eighth embodiment of the present invention.

Figure 8 is a plan view of a backlight module in accordance with a ninth embodiment of the present invention.

9A and 9B are cross-sectional views of a backlight module according to a tenth embodiment and an eleventh embodiment of the present invention, respectively.

10A to 10D are cross-sectional views of a backlight module according to a twelfth embodiment to a fifteenth embodiment of the present invention.

Figure 11 is a cross-sectional view showing an illuminated keyboard according to a sixteenth embodiment of the present invention.

Figure 12 is a cross-sectional view showing an illuminated keyboard according to a seventeenth embodiment of the present invention.

Figure 13 is a plan view of an illuminated keyboard in accordance with an eighteenth embodiment of the present invention.

Figure 14 is a plan view showing an illuminated keyboard according to a nineteenth embodiment of the present invention.

The various embodiments are described below, and the spirit and principles of the present invention should be readily understood by those of ordinary skill in the art. However, the specific embodiments are to be considered as illustrative and not restrictive or limiting. Therefore, various changes and modifications of the present invention are obvious and can be easily achieved without departing from the spirit and scope of the invention.

According to the first embodiment of the present invention, referring to FIG. 1A of the plan view of the backlight module 10 and FIG. 1B of the cross-sectional view of the backlight module 10 taken along line A-A' of FIG. 1A, the backlight module 10 includes the first The light guide plate 100, the second light guide plate 200, the circuit layer 150, and a plurality of first light sources 152 and a plurality of second light sources 154 are disposed on the circuit layer 150. The first light guide plate 100 has a first light incident surface 114 , a first light emitting surface 116 , a first bottom surface 118 , and a first side surface 112 . The first light-emitting surface 116 is opposite to the first bottom surface 118, and the first light-incident surface 114 and the first surface 112 are adjacent to the first light-emitting surface 116 and the first bottom surface 118, respectively, and are located on the first light-emitting surface 116 and the first light-emitting surface 116, respectively. Between a bottom surface 118. Similarly, the second light guide plate 200 disposed apart from the first light guide plate 100 has a second light incident surface 214, a second light exit surface 216, a second bottom surface 218, and a second side surface 212. The second light-emitting surface 216 is opposite to the second bottom surface 218, and the second light-incident surface 214 and the second surface 212 are adjacent to the second light-emitting surface 216 and the second bottom surface 218, respectively, and are located on the second light-emitting surface 216 and the second bottom surface 218. between.

Based on the above configuration, the first light incident surface 114 of the first light guide plate 100 and the second light incident surface 214 of the second light guide plate 200 face each other on the adjacent side of the first light guide plate 100 and the second light guide plate 200. That is, the first light incident surface 114 is spaced apart from the second light incident surface 214 and is correspondingly facing the ground. The circuit layer 150 can be disposed between the first light guide plate 100 and the second light guide plate 200 and disposed across the first light incident surface 114 and the second light incident surface 214. For example, the circuit layer 150 can be substantially along the first bottom At least a portion of the face 118 and/or the second bottom surface 218 extends and is disposed to span the first light incident surface 114 and the second light incident surface 214.

As described above, the plurality of first light sources 152 and the plurality of second light sources 154 disposed on the circuit layer 150 may respectively correspond to the first light incident surface 114 and the second light incident surface 214. Thereby, the plurality of first light sources 152 can emit light toward the first light incident surface 114 (for example, the emitted light L1 enters the first light incident surface 114), and the plurality of second light sources 154 can emit light toward the second light incident surface 214 ( For example, the emitted light L2 enters the second light incident surface 214). According to an embodiment of the present invention, in order to make the light emitted by the first light source 152 or the second light source 154 enter the first light incident surface 114 or the second light incident surface 214 as much as possible, the light is incident on the first light source. Before the light incident surface 114 and the second light incident surface 214 are lost, the plurality of first light sources 152 and the plurality of second light sources 154 may be adjacent to or adjacent to the first light incident surface 114 and the second light incident surface 214, respectively. However, the invention is not limited thereto.

In addition, the first light incident surface 114 and/or the second light incident surface 214 may have a larger area in order to receive light incident from a light source (eg, the first light source 152 or the second light source 154) with a larger incident area. For example, the area of the first light incident surface 114 in the first light guide plate 100 may be larger than the first side surface 112 , and the area of the second light incident surface 214 in the second light guide plate 200 may be larger than the second side surface 212 . That is, the thickness of the first light guide plate 100 on the first light incident surface 114 is greater than the thickness on the first side surface 112, and the thickness of the second light guide plate 200 on the second light incident surface 214 is greater than the thickness of the second side surface 212.

As described above, in order to make the thickness of the first light guide plate 100 on the first light incident surface 114 larger than the thickness of the first side surface 112, the first bottom surface 118 of the first light guide plate 100 may further have a first inclined surface 119. Specifically, the first inclined surface 119 that is at least a portion of the first bottom surface 118 may be located between the first light incident surface 114 and the first side surface 112, and the thickness of the first light guide plate 100 is along the first The inclined surface 119 gradually decreases from the first light incident surface 114 toward the first side surface 112, and the first bottom surface 118 located on both sides of the first inclined surface 119 may have a flat surface. However, the present invention is not limited thereto, and the thickness of the first light guide plate 100 at the first light incident surface 114 may be greater than the thickness of the first side surface 112 in any form or configuration according to various embodiments of the present invention. For example, the first light guide plate 100 may have a wedge-shaped structure, and the first light guide plate 100 may have a structure that is gradually thinned from one side of the second light guide plate 200 toward one side away from the second light guide plate 200. However, the above is merely an example, and the present invention is not limited thereto.

Similarly, the second bottom surface 218 of the second light guide plate 200 may further have a second inclined surface 219. Specifically, the second inclined surface 219 of the second bottom surface 218 may be located between the second light incident surface 214 and the second side surface 212, and the thickness of the second light guide plate 200 is along the second inclined surface 219. The second light entrance surface 214 is gradually reduced toward the second side surface 212, and the second bottom surface 218 located on both sides of the second inclined surface 219 may have a flat surface. However, the present invention is not limited thereto, and according to different embodiments of the present invention, the thickness of the second light guide plate 200 on the second light incident surface 214 may be greater than the thickness of the second side surface 212 in any form or configuration. For example, the second light guide plate 200 may have a wedge-shaped structure, and the second light guide plate 200 may have a structure that is gradually thinned from one side of the first light guide plate 100 toward one side away from the first light guide plate 100. However, the above is merely an example, and the present invention is not limited thereto.

In the backlight module 10, the circuit layer 150 can be, for example, a Flexible Printed Circuit (FPC), and the first light source 152 and/or the second light source 154 can be, for example, a light-emitting diode (Light- Emitter diode, LED). However, in the case where power can be supplied to cause the light source such as the first light source 152 and/or the second light source 154 to emit light, the circuit layer 150 and the light source of the present invention are not limited to the specific examples shown therein.

According to an embodiment of the invention, the backlight module 10 shown in FIG. 1A and FIG. 1B can be used as the backlight module 10 of the illuminated keyboard. For example, any suitable button module can be assembled with the backlight module 10 to form an illuminated keyboard. However, the backlight module of the present invention is not limited to this use, and the backlight module can also be used as a backlight module of other modules or devices.

Next, referring to FIG. 1C and FIG. 1D, a process of preparing the backlight module 10 shown in FIGS. 1A and 1B according to different embodiments of the present invention will be described.

1C shows the initial light guide plate 12 in the process of preparing the backlight module 10, and generally the initial light guide plate 12 may have a thicker side on one side, for example, the first side S1, according to an embodiment of the present invention. The thickness has a thinner thickness with respect to the second side S2 of the first side S1.

The initial light guide plate 12 can be made by rolling a material such as PMMA (polymethyl methacrylate) or the like into a mold such as a roller die. For example, the initial light guide plate 12 may be rolled to have a structure 15 extending along the first side S1 and having a thicker thickness at the first side S1, and the connection structure 15 having a thinner thickness relatively close to the second side Structure 25 of side S2. However, according to various embodiments of the present invention, the manner and material of the initial light guide plate 12 are not limited to the above-described examples, and the thicker structure 15 and the thinner structure 25 may not have a clear boundary or have a progressive relationship. Demarcation of the style.

As described above, since the initial light guide plate 12 can have a relatively thick thickness at the first side S1, when the first side S1 and the second side S2 are transversely cut along the cutting line D1 to divide the initial light guide plate 12, The first light guide plate 100 and the second light guide plate 200 may be formed to be assembled into the backlight module 10 as shown in FIGS. 1A and 1B. In detail, the first side S1 divided by the cross section can respectively form the first light incident surface 114 of the first light guide plate 100 and the second light incident surface 214 of the second light guide plate 200, and is horizontally The second side S2 of the first light guide plate 100 and the second side surface 212 of the second light guide plate 200 are respectively formed. Therefore, the first light guide plate 100 having a thick thickness on the first light incident surface 114 and the second light guide plate 200 having a thick thickness on the second light incident surface 214 can be formed.

According to an embodiment of the invention, the structure 15 can have a certain size. For example, it may have a width of about 10 mm in the extending direction of the cutting line D1. However, the above is merely an example, and the width of the structure 15 is not limited thereto.

Next, according to another embodiment of the present invention, FIG. 1D shows the initial light guide plate 14 in the process of preparing the backlight module 10, and in general, the initial light guide plate 14 may have a thick thickness inside, such as the center, and It has a thin thickness on both sides with respect to the inside such as the center. For example, the initial light guide plate 14 has a relatively thin thickness at the first side S1 and the second side S2, and at least a portion between the first side S1 and the second side S2 has a relative Thicker thickness.

The initial light guide plate 14 can also be made by rolling a material such as PMMA (polymethyl methacrylate) into a mold such as a roller die. Specifically, the initial light guide plate 14 may be rolled to form a strip structure 15 having a thick thickness inside, such as the center, and a structure 25 having a thin thickness on both sides of the strip structure 15. However, according to various embodiments of the present invention, the manner and material of the initial light guide plate 14 are not limited to the above-described examples, and the thicker structure 15 and the thinner structure 25 may not have a clear boundary or have a gradual progression. Demarcation of the style.

As described above, since the initial light guide plate 14 can have a relatively thick thickness inside, such as the center, when the initial light guide plate 14 is divided inside the strip structure 15 along the cutting line D2 in the extending direction of the strip structure 15, The first light guide plate 100 and the second light guide plate 200 may be formed to be assembled into the backlight module 10 as shown in FIGS. 1A and 1B. In detail, the strip structure 15 can form a first entrance surface 114 of the first light guide plate 100 and a second input light of the second light guide plate 200 along the cutting line D2. The light side 214, and the first side S1 can form the first side 112 of the first light guide plate 100, and the second side S2 can form the second side surface 212 of the second light guide plate 200. Therefore, the first light guide plate 100 having a thick thickness on the first light incident surface 114 and the second light guide plate 200 having a thick thickness on the second light incident surface 214 can be formed.

According to an embodiment of the present invention, in order to make the divided strip structure 15 have a certain size, in the case where the width of the conventional button or the key cap is 15 mm, the strip structure 15 of the initial light guide plate 14 is perpendicular to the same. The direction of the extension direction may have a width of approximately 15 mm to 20 mm. However, the above is merely an example, and the width of the strip structure 15 is not limited thereto.

The preparation process of the backlight module 10 of FIGS. 1A and 1B described above with reference to FIG. 1C and FIG. 1D is merely an example, and the present invention can be cut and combined in various ways to form the backlight shown in FIG. 1A and FIG. 1B. Module 10. Preferably, according to an embodiment of the present invention, the initial light guide plate can be prepared by using the same mold, and the backlight module of various different embodiments can be completed through the composite cutting combination. Therefore, the elasticity and margin of the light source and circuit layer 150 can be increased or improved.

In addition, according to the second embodiment of the present invention, referring to FIG. 2A of the plan view of the backlight module 20 and FIG. 2B of the cross-sectional view of the backlight module 20 taken along the line BB′ of FIG. 2A, the backlight module 20 The first light guide plate 100 and the second light guide plate 200 may be the same size as the backlight module 10 . That is, the first light guide plate 100 and the second light guide plate 200 of the backlight module 20 can freely change their relative proportions according to factors such as configuration requirements, and the present invention is not limited to the illustrated examples. For example, as shown in FIGS. 2A and 2B, the first light guide plate 100 may have a size larger than that of the second light guide plate 200.

The other details of the backlight module 20 shown in FIG. 2A and FIG. 2B are as described above with reference to FIG. 1A and FIG. 1B. The process of preparing the backlight module 20 may also be similar to that described with reference to FIGS. 1C and 1D. And the details will not be repeated here.

3A and FIG. 3B, in accordance with still another embodiment of the present invention, a backlight module can be formed by a process different from that of FIG. 1D in a manner similar to the initial light guide plate 32 of the initial light guide plate 14 shown in FIG. 1D. . In detail, the initial light guide plate 32 is similar to the initial light guide plate 14 and has a strip structure 15 having a thick thickness and a certain width inside, such as the center. If the first light guide plate 100 and the second light guide plate 200 are formed when the initial light guide plate 32 is cut, the distance between the first light guide plate 100 and the second light guide plate 200 can be adjusted to provide assembly, for example, the circuit layer 150. In the element, the first light guide plate on both sides of the first portion 15_1 and the second portion 15_2 can be formed by cutting the first portion 15_1 and the second portion 15_2 directly along the cutting lines D3 and D4 in the strip structure 15, respectively. 100 and the second light guide plate 200, and the third light guide plate 300 between the first portion 15_1 and the second portion 15_2. For example, the strip-shaped first portion 15_1 and the second portion 15_2 may be divided in the strip structure 15 and the intermediate structure 32' of the initial light guide plate 32 formed by cutting the first portion 15_1 and the second portion 15_2 directly Components such as the circuit layer 150 and the light source are assembled to form the backlight module 30 as shown in FIG. 3C. Specifically, the plurality of first light sources 152 may be disposed in the first region 15_1′ formed by removing the first portion 15_1, and the plurality of second light sources 154 may be disposed in the second portion formed by removing the second portion 15_2. Within the area 15_2'. That is, a plurality of first light sources 152 and a plurality of second light sources 154 may be respectively disposed on both sides of the third light guide plate 300. According to this embodiment of the present invention, the process of adjusting the distance between the first light guide plate 100 and the second light guide plate 200 can be reduced.

As described above, the backlight module 30 according to the third embodiment of the present invention as shown in FIGS. 3C and 3D can be prepared from the process shown in FIGS. 3A and 3B. Specifically, FIG. 3C is a plan view of the backlight module 30 prepared from the process shown in FIGS. 3A and 3B according to the third embodiment of the present invention, and FIG. 3D is along the line C-C of FIG. 3C. 'A cross-sectional view of the captured backlight module 30. However, the above is merely an example, and the backlight module of the present invention which can be made by the process shown in FIGS. 3A and 3B is not Limited to this.

Specifically, referring to FIG. 3C and FIG. 3D , the backlight module 30 may have a third light guide plate 300 left uncut in the process between the first light guide plate 100 and the second light guide plate 200 . According to some embodiments of the present invention, as shown in FIG. 3C, in order to make the third light guide plate 300 also have light incident, at least one of the plurality of first light sources 152 and/or at least one of the plurality of second light sources 154 may be The light is emitted toward the third light guide plate 300. For example, one of the four first light sources 152 arranged in a row may emit light L3 toward the third light guide plate 300, and one of the four second light sources 154 arranged in a row may face the third light guide plate 300. The first light source 152 and the second light source 154 that emit light L4 and emit light toward the third light guide plate 300 may be regularly spaced apart from each other to uniformly emit light to the third light guide plate 300. However, according to various embodiments of the present invention, the light source to be illuminated toward the first light guide plate 100, the second light guide plate 200, and the third light guide plate 300 may be distributed in any predetermined form, and the present invention is not limited thereto.

In order to reduce the light emitted by the first light source 152 or the second light source 154 to the first light guide plate 100, the second light guide plate 200, and/or the third light guide plate 300 as much as possible, the optical light source 152 or the third light guide plate 300 is reduced or avoided. For the incident light loss, the plurality of first light sources 152 and the plurality of second light sources 154 may be in close proximity to or in close proximity to the first light guide plate 100, the second light guide plate 200, and/or the third light guide plate 300, respectively. However, the invention is not limited thereto.

In addition, according to other embodiments of the present invention, when a plurality of backlight modules of different states are expected to be formed by the same pre-process and different subsequent processes, and the first light guide plate of at least one of the predetermined backlight modules is specified The distance between the 100 and the second light guide plate 200 cannot be directly separated from the process shown in FIG. 3A and FIG. 3B, and may be separated in the initial light guide plate 42 along the cutting lines D3 and D4, respectively, as shown in FIG. 4A. The first part 15_1 and the second part 15_2, as shown in Figure 4B The third portion 300 ′ corresponding to the third light guide plate 300 of FIG. 3B is further separated for a specific backlight module to further adjust the first light guide plate 100 and the second light guide plate in the intermediate structure 42 ′ of the initial light guide plate 42 according to requirements. The distance or configuration between 200s forms a different backlight module. In addition, if the backlight module formed by the preset includes only the backlight module that needs to adjust the distance between the first light guide plate 100 and the second light guide plate 200, it can be directly and monolithically integrated in the process shown in FIG. 4A. The division corresponds to the blocks corresponding to the first portion 15_1, the second portion 15_2, and the third portion 300', without separately dividing the first portion 15_1 and the second portion 15_2 and the third portion 300'.

Referring to FIG. 4C and FIG. 4D, according to the process shown in FIG. 4A and FIG. 4B, the distance between the first light guide plate 100 and the second light guide plate 200 can be adjusted according to the configuration to be illuminated. A backlight module 40 according to a fourth embodiment of the present invention and a backlight module 50 according to a fifth embodiment of the present invention are formed. For example, when the distance between the first light guide plate 100 and the second light guide plate 200 is the width W1 when the block corresponding to the first portion 15_1, the second portion 15_2, and the third portion 300' is rounded off, according to the present invention The first light guide plate 100 and the second light guide plate 200 of the backlight module 40 of the fourth embodiment may have a width W2 greater than the width W1, and the first of the backlight modules 50 according to the fifth embodiment of the present invention. The light guide plate 100 and the second light guide plate 200 may have a width W3 smaller than the width W1.

Hereinafter, the backlight module 60 according to the sixth embodiment of the present invention will be further explained. 5A is a plan view of a backlight module 60 according to a sixth embodiment of the present invention, and FIG. 5B is a cross-sectional view of the backlight module 60 taken along line D-D' of FIG. 5A.

5A and FIG. 5B, similar to the backlight module 10 shown in FIG. 1A and FIG. 1B, the backlight module 60 includes a first light guide plate 100, a second light guide plate 200, a circuit layer 150, and a circuit. A plurality of first light sources 152 and a plurality of second light sources 154 on layer 150. First guide The light guide plate 100 has a first light incident surface 114, a first light exit surface 116, a first bottom surface 118, and a first side surface 112, and the second light guide plate 200 disposed apart from the first light guide plate 100 has a second light incident surface 214, The second light emitting surface 216, the second bottom surface 218 and the second side surface 212.

The difference between the backlight module 60 shown in FIG. 5A and FIG. 5B and the backlight module 10 shown in FIG. 1A and FIG. 1B is that the first light guide plate 100 has a plurality of numbers on the first light incident surface 114 side. The second light guide plate 200 has a plurality of second protrusions 220 on the second light incident surface 214 side, and the plurality of first protrusions 110 and the plurality of second protrusions 220 are staggered.

As described above, according to an embodiment of the present invention, at least one of the plurality of first protrusions 110 may extend between the adjacent two second protrusions 220, and at least the plurality of second protrusions 220 One of them can extend between the adjacent two first protrusions 110. However, the present invention is not limited thereto, and the plurality of first protrusions 110 and the plurality of second protrusions 220 may also be alternately disposed without overlapping. In addition, the rectangular shapes of the first protrusions 110 and the second protrusions 220 shown here are merely examples, and the first protrusions 110 and the second protrusions 220 of the present invention may have different protruding shapes.

According to the sixth embodiment of the present invention, the plurality of first light sources 152 and the plurality of second light sources 154 may be alternately arranged between the first light incident surface 114 and the second light incident surface 214 in a zigzag configuration. In detail, the plurality of first light sources 152 may be disposed adjacent to the plurality of first protrusions 110 , and the plurality of second light sources 154 may be disposed adjacent to the plurality of second protrusions 220 . Thereby, the plurality of first light sources 152 emit light toward a corresponding one of the plurality of first protrusions 110 (for example, the incident light ray L1), and the plurality of second light sources 154 correspond to the plurality of second protrusions 220 One of the luminescence (for example, incident light L2).

With the above structure, the first protrusion 110 and the second protrusion 220 are partially partially intersected. The stacking and staggering arrangement can reduce or avoid shadows or unlit/non-incident light dead zones in the backlight module 60. Therefore, the uniformity and brightness of the illumination of the entire backlight module 60 can be improved.

The backlight module 60 described above with reference to FIGS. 5A and 5B can be prepared in various ways or processes. For example, referring to FIG. 5C, the backlight module 60 shown in FIGS. 5A and 5B can be made similar to the initial light guide plate 62 of the initial light guide plate 14 of FIG. 1D according to an embodiment of the present invention. Specifically, the initial light guide plate 62 can be formed by rolling a material such as PMMA (polymethyl methacrylate) or the like by a die such as a roller die, wherein the initial light guide plate 62 can be rolled to have a larger inner portion such as the center. A strip structure 15 of thick thickness and a structure 25 having a relatively thin thickness on both sides of the strip structure 15. The initial light guide plate 62 cuts the strip structure 15 having a thick inner portion along the cutting line D5 in a staggered manner to cut a plurality of first protrusions 110 of the first light guide plate 100 and a plurality of second portions of the second light guide plate 200. The protrusion 220. Specifically, the cutting line D5 may first extend along a direction parallel to the extending direction of the strip structure 15, and then bend to extend from the first light guide plate 100 toward the second light guide plate 200, and then bend to continue along the strip. The extending direction of the structure 15 extends and is further bent to extend from the second light guide plate 200 toward the first light guide plate 100, and the above cycle is sequentially repeated. Thereby, when the initial light guide plate 62 is divided along the cutting line D5 substantially along the extending direction of the strip structure 15 but in a meandering manner, the first embodiment shown in FIGS. 5A and 5B can be formed. A light guide plate 100 and a second light guide plate 200.

In addition, referring to FIG. 5D, according to another embodiment of the present invention, the backlight module 60 shown in FIGS. 5A and 5B can also be fabricated similarly to the initial light guide plate 64 of the initial light guide plate 12 of FIG. 1C. Specifically, the initial light guide plate 64 can be formed by rolling a material such as PMMA (polymethyl methacrylate) or the like by a die such as a roller die, wherein the initial light guide plate 64 can be rolled to be on one side thereof, for example The first side S1 has a structure 15 having a thicker thickness extending along the first side S1, and The structure 15 is connected to the structure 25 having a relatively thin thickness with respect to the second side S2 of the first side S1. The inside of the strip structure 15 is cut along the cutting line D6 (similar to the meandering manner of the cutting line D5) in a zigzag manner along the extending direction of the strip structure 15 (that is, the extending direction of the first side S1). The initial light guide plate 64 further divides the initial light guide plate 64 across the first side S1 and the second side S2 along the cutting line D7, and can form the first light guide plate 100 and the second body shown in FIG. 5A and FIG. 5B. Light guide plate 200. However, the processes shown in FIG. 5C and FIG. 5D are only

The embodiments described above with reference to FIG. 1A to FIG. 5D can be combined with each other and combined into other embodiments without conflicting with each other, and such embodiments are also within the scope of the present invention.

Next, a backlight module according to other modified embodiments of the present invention will be described with reference to FIGS. 6A and 6B. 6A is a plan view of a backlight module 70 according to a seventh embodiment of the present invention, and FIG. 6B is a cross-sectional view of the backlight module 70 taken along line E-E' of FIG. 6A.

According to the seventh embodiment of the present invention, the backlight module 70 can have a third light guide plate 300, and the third light guide plate 300 has a plurality of openings 305 arranged in a staggered manner, and the plurality of first light sources 152 and the plurality of second light sources 154 corresponds to a plurality of openings 305. Therefore, the first light source 152 and the second light source 154 of the backlight module 70 are substantially interlaced with each other due to the plurality of openings 305 interlaced. Therefore, the first light source 152 and the second light source 154 can be substantially alternately incident on the third light guide plate 300 to pass through the third light guide plate 300, respectively, similarly to the embodiment described above with reference to FIGS. 5A and 5B. The first light incident surface 114 and the second light incident surface 214 are incident on the light, so that the shadow in the backlight module 70 or the unlit/non-incident light dead zone dark area can be reduced or avoided. Therefore, the uniformity of illumination of the entire backlight module 70 can be improved.

According to an embodiment of the present invention, the backlight module 70 shown in FIGS. 6A and 6B can be first made into a first light guide plate 100 and a second guide similar to the process described in FIG. 1C and FIG. 1D. The light guide plate 200 is further disposed between the first light guide plate 100 and the second light guide plate 200. 6C and FIG. 6D, the backlight module 70 shown in FIGS. 6A and 6B can also be made similar to the initial light guide plate 72 of the initial light guide plate 14 of FIG. 1D. Specifically, the initial light guide plate 72 can be formed by rolling a material such as PMMA (polymethyl methacrylate) or the like by a die such as a roller die, wherein the initial light guide plate 72 can be rolled to have a larger inner portion such as the center. A strip structure 15 of thick thickness and a structure 25 having a relatively thin thickness on both sides of the strip structure 15. First, referring to Fig. 6C, the strip structures 15 inside the initial light guiding plate 72 are alternately cut along the cutting line D8 to remove a plurality of blocks 305' which are, for example, square shapes. Thereby, as shown in Fig. 6D, a plurality of openings 305 corresponding to the plurality of blocks 305' can be cut. Then, at least a portion of the strip structure 15 including the plurality of openings 305 is cut along the cutting lines D9 and D10 in the intermediate structure 72' of the initial light guide plate 72 to form the third light guide plate 300, and the third light guide plate 300 is The first light guide plate 100 and the second light guide plate 200 on both sides of the strip structure 15 are separated, so that the first light guide plate 100, the second light guide plate 200 and the third guide can be adjusted based on the preset size of the light source and the circuit layer 150. The distance between the light panels 300. Then, the circuit layer 150 and the first light source 152 and the second light source 154 respectively positioned in the plurality of openings 305 are respectively disposed to form the backlight module 70 of the seventh embodiment as shown in FIGS. 6A and 6B.

According to some embodiments of the present invention, when the distance between the first light guide plate 100, the second light guide plate 200, and the third light guide plate 300 is adjusted based on factors such as preset setting of the light source and the size of the circuit layer 150, A plurality of openings 305 are cut in the initial light guide plate 72 to form an intermediate structure 72 ′, and the circuit layer 150 and the respective first light source 152 and the second light source 154 are directly disposed in the plurality of openings 305 to form a backlight module. The invention is not limited to the embodiments specifically shown herein.

Next, another implementation according to the present invention will be described with reference to FIGS. 7A to 7C. The process of preparing a backlight module.

First, referring to FIG. 7A, in accordance with an embodiment of the present invention, the backlight module 80 shown in FIG. 7C can be fabricated similar to the initial light guide plate 82 of the initial light guide plate 12 of FIG. 1C. Specifically, the initial light guide plate 82 can be formed by rolling a material such as PMMA (polymethyl methacrylate) or the like by a mold such as a roller die, wherein the initial light guide plate 82 can be rolled to be on one side thereof, for example The first side S1 has a structure 15 having a relatively thick thickness extending along the first side S1, and a structure 25 connecting the structure 15 to have a relatively thin thickness with respect to the second side S2 of the first side S1. Then, an elongated strip 300" can be cut away substantially in a direction transverse to the first side S1 and the second side S2. Thereby, the initial light guide 82 can be separated from the first light guide 100 and The first light guide plate 100 is completely separated from the second side surface 212 of the second light guide plate 200, and the first light incident surface 114 and the second light guide plate of the first light guide plate 100 are separated. The second light incident surface 214 of 200 is indirectly connected to each other by a light guide plate connecting portion 315.

Specifically, after the long strip 300 ′′ is cut off, the first side S1 can respectively form the first light incident surface 114 of the first light guide plate 100 , the light guide plate connecting portion 315 , and the second light guide plate 200 . The first side surface 112 of the first light guide plate 100 and the second side surface 212 of the second light guide plate 200 are respectively formed on the first side surface S2 of the first light guide plate 100. Therefore, the first light incident surface can be formed on the first light incident surface. The first light guide plate 100 having a thick thickness and the second light guide plate 200 having a thick thickness on the second light incident surface 214, and the first light guide plate 100, the second light guide plate 200 and the light guide plate connecting portion 315 are integrated forming.

In detail, referring to FIG. 7A, when the first light guide plate 100, the second light guide plate 200, and the light guide plate connecting portion 315 are formed, the light guide plate connecting portion 315, the first light incident surface 114, and the second light incident surface 214 are Coherently arranged, and the light guide plate connecting portion 315 is connected to the first light incident surface 114 and the second light incident Between faces 214. According to an embodiment of the present invention, the length of the light guide plate connecting portion 315 between the first light guide plate 100 and the second light guide plate 200 may be less than 3 mm. However, the invention is not limited thereto. Next, referring to FIG. 7B and FIG. 7C, in the process of preparing the backlight module according to an embodiment of the present invention, since the light guide plate connecting portion 315 has flexibility, the intermediate structure 82' formed by cutting the initial light guide plate 82 can be cut. The light guide plate connecting portion 315 is bent so that the first light incident surface 114 and the second light incident surface 214 having a thick thickness to increase the amount of incident light face each other and are disposed inside the backlight module 80. As described above, after the light guide plate connecting portion 315 is bent and the first light incident surface 114 and the second light incident surface 214 face each other, the circuit layer 150, the first light source 152, the second light source 154, and the like can be rearranged. A backlight module 80 of the eighth embodiment as shown in FIG. 7C is formed. In the backlight module 80, the light guide plate connecting portion 315 is on the same side end of the first light incident surface 114 and the second light incident surface 214 (for example, the first side of the first side end P1 and the second side end P2) The terminal P1) connects the first light guide plate 100 and the second light guide plate 200.

According to the process and the backlight module of the embodiment described above with reference to FIG. 7A to FIG. 7C, since the first light guide plate 100 and the second light guide plate 200 are integrally connected by the light guide plate connecting portion 315, only the process is required in the process. A part number saves the need to configure different parts with different item numbers and manage them. Thereby, the management program when preparing the backlight module can be simplified, the process of combining different components can be reduced, and the possibility of error in the combined configuration can be avoided or reduced.

Further, referring to FIG. 8, the above-described preparation process with reference to FIGS. 7A to 7C can also be similarly applied to the embodiment of the backlight module as shown in FIG. 5A. In detail, the backlight module 90 shown in FIG. 8 can also include a light guide plate connecting portion 315 connected between the first light guide plate 100 and the second light guide plate 200, and the backlight module 90 can be bent by The flexible light guide plate connecting portion 315 is formed such that the first light incident surface 114 and the second light incident surface 214 face each other. In addition, the first light guide plate 100 and the second light guide plate 200 have the first protruding portion 110 and the second protruding portion 220 shown in FIG. 5A, respectively. The manufacturing process and the concept of the finished product of the backlight module 90 of the ninth embodiment shown in FIG. 8 are similar to those described with reference to FIGS. 7A to 7C, and will not be described herein.

Further, according to the tenth embodiment and the eleventh embodiment of the present invention, the backlight module may include a plurality of optical microstructures. For example, referring to FIG. 9A and FIG. 9B, a backlight module 91 and a backlight module 93 similar to the backlight module 10 shown in FIG. 1B are illustrated, and the following mainly describes FIGS. 9A and 9B and FIG. 1B. difference. In the backlight module 91 and the backlight module 93, a plurality of optical microstructures 905 can be further disposed in the light guide plate compared with the backlight module 10. For example, referring to FIG. 9A, a plurality of optical microstructures 905 can be formed on the first light-emitting surface 116 and the second light-emitting surface 216. Alternatively, referring to FIG. 9B, a plurality of optical microstructures 905 may be formed on the first bottom surface 118 and the second bottom surface 218. Here, the optical microstructures 905 may be, for example, dots, sawtooth, grooves, or a combination thereof, and the invention is not limited thereto. Thereby, the light incident into the first light guide plate 100 and the second light guide plate 200 can be further guided or gathered by the optical microstructure 905, so that the expected amount of light can be from the first light exit surface 116 and the second light exit surface. Exit on 216.

Hereinafter, an example of a backlight module according to the twelfth to fifteenth embodiments of the present invention will be further described with reference to FIGS. 10A to 10D.

In FIGS. 10A to 10D , the backlight modules 400 , 500 , 600 , and 700 of the twelfth to fifteenth embodiments may further include a mask layer 250 and a reflective sheet 350 . The mask layer 250 can be disposed on the first light guide plate 100, the first light source 152, the second light source 154, and the second light guide plate 200, and can act, for example, to selectively shield the light that can be emitted through the backlight module. Part of it. For example, according to an embodiment of the present invention, the mask layer 250 may have a mask pattern including a light transmitting region and an opaque region, and the light transmitting region corresponds to a preset setting button or a keycap position, instead of The light transmitting area corresponds to a position where the button or the key cap is not set in advance. In addition, the reflective sheet 350 can be disposed at the first The light guide plate 100, the first light source 152, the second light source 154, and the second light guide plate 200 are underneath and can, for example, act to reflect light leaking from under the backlight module to increase the efficiency of light emitted from the backlight module. The mask layer 250 and the reflective sheet 350 can sandwich the first light guide plate 100, the first light source 152, the second light source 154, and the second light guide plate 200 of the intermediate interlayer, and the mask layer 250 and the reflection The chip 350 can be attached to the peripheral edges of the backlight modules 400, 500, 600, and 700 to package the first light guide plate 100, the first light source 152, the second light source 154, and the second light guide plate 200 to form the backlight module 400. 500, 600 and 700.

Specifically, the mask layer 250 is attached to the first light-emitting surface 114 of the first light guide plate 100 and the second light-emitting surface 214 of the second light guide plate 200, and the reflective sheet 350 is attached to the first light guide plate 100. The bottom surface 118 and the second bottom surface 218 of the second light guide plate 200. In addition, referring to FIGS. 10A-10D, the reflective sheet 350 has a recess 355, and the recess 355 is configured to correspond to at least a portion of the circuit layer 150.

In addition to the mask layer 250 and the reflective sheet 350 being attached to the peripheral edges of the backlight modules 400, 500, 600, and 700, according to some embodiments of the present invention, the mask layer 250 and the first light guide plate may also be used. 100 and/or the second light guide plate 200 is partially dispensed to bond the mask layer 250 with the first light guide plate 100 and/or the second light guide plate 200, or may be disposed on the reflective sheet 350 and the first light guide plate 100. / or a partial dispensing between the second light guide plate 200 to bond the reflective sheet 350 with the first light guide plate 100 and / or the second light guide plate 200. For example, a glue may be dispensed between the mask layer 250 or the reflective sheet 350 between the light sources and the first light guide panel 100 and/or the second light guide panel 200. Thereby, the relative positioning reliability of the first light guide plate 100 and the second light guide plate 200 is further increased.

According to various embodiments of the present invention, the circuit layer 150 may be disposed at different locations based on the mask layer 250 and the reflective sheet 350. For example, according to the twelfth embodiment of the present invention, the backlight module 400 The circuit layer 150 can be disposed between the first light source 152 and the second light source 154 and the reflective sheet 350. According to the thirteenth embodiment of the present invention, the circuit layer 150 of the backlight module 500 can be disposed on the first light source 152 and the first The second light source 154 and the reflective sheet 350 (ie, outside the reflective sheet 350); according to the fourteenth embodiment of the present invention, the circuit layer 150 of the backlight module 600 can be disposed on the first light source 152 and the second light source 154 and According to the fifteenth embodiment of the present invention, the circuit layer 150 of the backlight module 700 can be disposed on the first light source 152 and the second light source 154 and the mask layer 250 (ie, the mask layer). 250 outside).

According to an embodiment of the present invention, there may be local dispensing between the first light guide plate 100 and/or the second light guide plate 200 and the mask layer 250 or the reflective sheet 350, and thus the first light guide plate 100 and/or the second The height of the light guide plate 200 plus the glue may be equal to the height of the first light source 152 or the second light source 154. In addition, in order to connect the first light source 152 and the second light source 154 to the circuit layer 150, when the circuit layer 150 is disposed outside the mask layer 250 or the reflective sheet 350, the first light source 152 and the second light source 154 may pass through. The via hole of the mask layer 250 or the reflective sheet 350 is connected to the circuit layer 150. Therefore, according to some embodiments of the present invention, the thickness of the first light guide plate 100 and the second light guide plate 200 may be equal to or smaller than the thickness of the plurality of first light sources 152 and the plurality of second light sources 154. However, the above is merely an example, and the present invention is not limited thereto.

In addition, the aspects of the backlight module according to the twelfth to fifteenth embodiments of the present invention may be applied to other embodiments. For example, in a case where the backlight module includes the third light guide plate 300, the mask layer 250 and the reflective sheet 350 may encapsulate the first light guide plate 100, the first light source 152, the second light source 154, and the second light guide plate 200, and The third light guide plate 300 is used to form a backlight module. Similarly, in this case, the thickness of the first light guide plate 100, the second light guide plate 200, and the third light guide plate 300 may be equal to or smaller than the thickness of the plurality of first light sources 152 and the plurality of second light sources 154.

Further, the backlight module of all the embodiments described above can be assembled with the button module to form an illuminated keyboard. For example, referring to FIG. 11 , a light-emitting keyboard 1000 according to a sixteenth embodiment of the present invention may include a backlight module 800 and a button module 900 disposed on the backlight module 800 . Specifically, the button module 900 can include a substrate 910 for setting a plurality of buttons and a plurality of buttons including a keycap 930 disposed on the substrate 910. According to some embodiments of the present invention, the plurality of buttons may further include a thin film circuit layer 920 as a switch and a support structure between the thin film circuit layer 920 and the key cap 930. In addition, according to some embodiments of the present invention, as shown in FIG. 11, the plurality of key film circuit layers 920 may be integrally formed or partially connected. However, the above are merely examples, and the aspect of the button module 900 is not limited to the specific examples. In the above, by combining the backlight module 800 with the button module 900, the light provided by the backlight module 800 can be emitted from a plurality of buttons. Thereby, the illuminated keyboard 1000 including the backlight module can be realized by the keyboard.

Here, the backlight module 800 can include a mask layer 250 and a reflective sheet 350 , and the button module 900 can be attached to the mask layer 250 . For example, the reflective sheet 350 having the concave portion 355 is disposed on the opposite side of the backlight module 800 to which the button module 900 is attached, and the button module 900 can be attached to the mask layer 250 which is relatively flat without the concave portion. Thereby, the button module 900 can be positioned on the backlight module 800 relatively smoothly and stably.

According to the sixteenth embodiment of the present invention, the backlight module 800 can include the first light guide plate 100 and the second light guide plate 200. The substrate 910 of the button module 900 can have a plurality of light source holes 952 and 954, and the plurality of first light sources 152 and the plurality of second light sources 154 can be partially disposed in the plurality of light source holes 952 and 954 respectively. In addition, the backlight module 800 is merely an example, and the backlight module 800 may be any of the backlight modules described above or others falling within the scope of the present invention. The backlight module, and the invention is not limited thereto.

For example, according to the seventeenth embodiment of the present invention, the illuminated keyboard 2000 can have a structure similar to that of the above-described illuminated keyboard 1000, and the difference is the first light guide plate 100 and the second of the backlight module 800' of the illuminated keyboard 2000. The light guide plate 200 can be integrally formed. The backlight module according to different embodiments of the present invention can be further assembled with the button module 900 to form an illuminated keyboard similar to the examples described with reference to FIGS. 11 and 12, and it will not be used here. statement.

Next, different embodiments of an illuminated keyboard equipped with a backlight module will be further described with reference to FIGS. 13 to 14. 13 is a plan view of an illuminated keyboard according to an eighteenth embodiment of the present invention; and FIG. 14 is a plan view of an illuminated keyboard according to a nineteenth embodiment of the present invention.

Specifically, referring to FIG. 13, in accordance with an eighteenth embodiment of the present invention, the illuminated keyboard 3000 can include a backlight module of the backlight module type shown in FIG. 5A, and a plurality of first light sources 152 and a plurality of The two light sources 154 can respectively inject the light L1 and the light L2 into the first light guide plate 100 and the second light guide plate 200 so that the light can pass through the first light exit surface and the second light exit surface and then pass through the plurality of buttons or the key cap 930. Glowing. For example, since the buttons or keycaps 930 of the adjacent keyboards are arranged in a staggered manner, in order to avoid the dead angle of the illumination light, it is preferable to use a backlight module with incident light in an interlaced manner to ensure the overall illuminated keyboard. Luminous uniformity and brightness. In addition, according to some embodiments, the contour of the light incident surface of the backlight module may be aligned, partially aligned or not aligned with the edges of the plurality of buttons or the key cap 930 or the center connecting line. However, all of the above are merely examples and are based on the desired illumination and configuration of the keyboard (eg, overall illumination shape, illumination directly under the button or keycap 930, illumination around the button or keycap 930, at a particular button or The key cap 930 emits light, etc., according to the first light incident surface 114 and the second light incident surface 214 of the backlight module of the present invention, The arrangement of a light source 152 and a second light source 154 is not limited thereto.

For example, referring to FIG. 14, in accordance with a nineteenth embodiment of the present invention, illuminated keyboard 4000 can include a variety of different configurations for a particular keyboard or desired configuration. Specifically, referring to the portion F, two light sources may be disposed relative to one first protrusion 110 at a specific position, and two light sources such as the first light source 152 and the second light source 154 may respectively enter the light toward the opposite side. Then, referring to the portion G, two light sources can be disposed relative to one first protrusion 110 at a specific position, and two light sources such as two first light sources 152 can simultaneously enter the same side (such as the first protrusion 110). . In addition, with further reference to the portion H, the first protrusion 110 may be disposed in a shape other than a rectangular shape at a specific position, and at least one light source (such as the first light source 152) may correspond to the tip or edge of the first protrusion 110. The shape is set to convert the angle of the incident light. Alternatively, in a state in which the protruding portion 110 has a rectangular shape, at least one light source may also adjust the set angle to inject light from the various desired angles to the backlight module. In addition, in the illuminated keyboard, in order to prevent the protruding portion from forming a dark region, at least one light source incident light may be disposed into the protruding portion. However, the above are merely examples, and the present invention is not limited thereto. As a result, the junctions and light sources in the backlight module can be configured for the illumination of the keyboard of the intended design by various combinations, and the invention is not limited to the examples specifically set forth herein.

In summary, according to various embodiments of the present invention, the flexibility of configuring the light source and the circuit board can be further increased under the reduced process and/or cost, and the configuration of the backlight module can be adjusted based on the preset illumination mode and configuration. , thereby improving the applicability of the backlight module.

The foregoing is merely illustrative of some preferred embodiments of the invention. It should be noted that various changes and modifications can be made in the present invention without departing from the spirit and scope of the invention. It will be apparent to those skilled in the art that the present invention is defined by the scope of the appended claims. And variations of the various possible alternatives, combinations, modifications, and variations of the present invention are intended to be within the scope of the invention as defined by the appended claims.

Claims (14)

A backlight module of an illuminated keyboard, comprising: a first light guide plate having a first light incident surface, a first light emitting surface, a first bottom surface and a first side surface, wherein the first light emitting surface and the first light emitting surface The first light-incident surface and the first light-emitting surface are respectively adjacent to the first light-emitting surface and the first bottom surface and located between the first light-emitting surface and the first bottom surface; a second light guide plate, and the The first light guide plate is spaced apart from each other and has a second light incident surface, a second light emitting surface, a second bottom surface and a second side surface, wherein the second light emitting surface is opposite to the second bottom surface, and the second light incident surface The second surface is adjacent to the second light emitting surface and the second bottom surface respectively between the second light emitting surface and the second bottom surface; a circuit layer is disposed across the first light incident surface and the second surface a light incident surface; and a plurality of first light sources disposed on the circuit layer, wherein the plurality of first light sources emit light toward the first light incident surface; a plurality of second light sources are disposed on the circuit layer, and the plurality of The two light sources emit light toward the second light incident surface; wherein the first light incident surface and the second light incident surface The light guide faces the first light guide plate and the second light guide plate adjacent to each other, the thickness of the first light guide plate on the first light incident surface is greater than the thickness of the first light guide plate, and the second light guide plate The thickness of the second light incident surface is greater than the thickness of the second side surface. The backlight module of claim 1, wherein the first bottom surface further has a first inclined surface, the first inclined surface is located between the first light incident surface and the first side surface, so that the first light guide plate The thickness of the first inclined surface gradually decreases from the first light incident surface toward the first side surface. The backlight module of claim 1, further comprising a third light guide plate, the third light guide plate being located between the first light guide plate and the second light guide plate. The backlight module of claim 3, wherein the plurality of first light sources and the plurality of second light sources are respectively located on two sides of the third light guide plate; or the third light guide plate has a plurality of openings, and the plurality The first light source and the plurality of second light sources are disposed corresponding to the plurality of openings. The backlight module of claim 4, wherein the thickness of the first light guide plate, the second light guide plate, and the third light guide plate is equal to or smaller than a thickness of the plurality of first light sources and the plurality of second light sources. The backlight module of claim 1, further comprising a light guide plate connecting portion, the light guide plate connecting portion connecting the first light guide plate and the same side end of the first light incident surface and the second light incident surface a second light guide plate, wherein the first light guide plate, the second light guide plate, and the light guide plate connecting portion are integrally formed. The backlight module of claim 6, wherein when the first light guide plate, the second light guide plate and the light guide plate connecting portion are formed, the light guide plate connecting portion, the first light incident surface and the second input The light guides are arranged in a line and the light guide plate connecting portion is connected between the first light incident surface and the second light incident surface. The light guide plate connecting portion has flexibility, and the light guide plate connecting portion is bent. The first light incident surface and the second light incident surface face each other. The backlight module of claim 1, wherein the first light guide plate has a plurality of first protrusions on the first light incident surface side, and the second light guide plate has a plurality of first light incident surface sides. a second protruding portion, and the plurality of first protruding portions and the plurality of second protruding portions are staggered. The backlight module of claim 8, wherein the plurality of first light sources and the plurality of The second light source is alternately arranged between the first light incident surface and the second light incident surface in a zigzag configuration, and the plurality of first light sources emit light toward one of the plurality of first protruding portions, the plural The second light sources emit light toward one of the plurality of second protrusions. The backlight module of claim 9, wherein at least one of the plurality of first protrusions protrudes between the adjacent two second protrusions, and at least one of the plurality of second protrusions extends Between the two adjacent first protrusions. The backlight module of claim 1, further comprising a mask layer and a reflective sheet, wherein the reflective sheet has a recess, wherein the mask layer is attached to the first light-emitting surface of the first light guide plate and The second light-emitting surface of the second light guide plate is attached to the first bottom surface of the first light guide plate and the second bottom surface of the second light guide plate, and the concave portion is disposed corresponding to the circuit layer At least part. The backlight module of claim 1, further comprising a plurality of optical microstructures formed on the first light emitting surface and the second light emitting surface, or formed on the first bottom surface and the first On the bottom surface. An illuminating keyboard, comprising: the backlight module according to any one of claims 1 to 12; a button module, located on the backlight module, the button module comprising a substrate and a plurality of substrates disposed on the substrate A button is provided, and the light provided by the backlight module is emitted from the plurality of buttons. The illuminating keyboard of claim 13, wherein the substrate has a plurality of light source holes, and the plurality of first light sources and the plurality of second light sources are partially disposed in the plurality of light source holes.