TWM525536U - Backlight module and light keyboard - Google Patents

Description

Backlight module and illuminated keyboard

The present invention relates to a keyboard, and more particularly to an illuminated keyboard and a backlight module of the illuminated keyboard.

A backlight module for an illuminated keyboard as disclosed in the Patent No. I508119 of the Republic of China, is a plurality of light-emitting diodes arranged along the circumference of the light guide plate, that is, the light-emitting diodes The body is arranged along a long side or a short side of the light guide plate. Another backlight module of the illuminated keyboard disclosed in the Patent No. I501278 of the Republic of China is a method in which a plurality of light-emitting diodes are disposed at the center of the light guide plate, and the light-emitting diodes emit light. The side is toward the circumferential side of the light guide plate.

However, the light-emitting brightness of the light guide plate of the above-mentioned illuminated keyboard corresponds to the sum of the light intensities transmitted to all the light-emitting diodes, and the light-emitting diodes are transmitted to the corresponding word keys of the light guide plate. The light intensity is not the same, so that the light-emitting brightness of the light-guiding plate corresponding to each word key is not the same, so that the light-emitting brightness of the light-transmitting identification symbols of the word keys of the light-emitting keyboard is not uniform, for example, The light-emitting luminance of the light-transmissive identification symbol adjacent to the word key of the light-emitting diodes may be large, and the light-emitting luminance of the light-transmitting identification symbol away from the word keys of the light-emitting diodes may be small.

Therefore, how to make the light-emitting brightness of the light-transmissive recognition symbol of the word key in different areas of the illuminated keyboard uniform, so that when the light-emitting keyboard is used in the dark place, the user can easily recognize the identification symbol on each word key, which is urgently solved by the industry. The problem.

Therefore, the first object of the present invention is to provide a backlight module.

Therefore, the backlight module of the present invention comprises a light guide plate, a light reflecting member, and a light emitting unit.

The light guide plate comprises a bottom entrance and exit light surface, a top entrance and exit light surface opposite to the bottom entrance and exit light surface, a circumferential surface connected between the bottom entrance and exit light surface and the periphery of the top entrance and exit light surface, and a plurality of light guide blocking spaces . The light-guiding barrier spaces cooperate to divide the light guide plate into a plurality of light guide localities.

The reflector is disposed on the bottom entrance and exit surface.

The light emitting unit includes a plurality of light sources respectively disposed at the light guide limits.

The light-guiding barrier spaces are used to limit the light emitted by each light source to be confined within the respective light guide limits.

A second object of the present invention is to provide an illuminated keyboard.

Thus, the novel illuminated keyboard comprises a backlight module as described above and a keyboard module.

The keyboard module is disposed on the top surface of the light guide plate of the backlight module, and includes a bottom plate and a plurality of word keys respectively disposed on the bottom plate and corresponding to the light guide limitation portions. The bottom plate has a plurality of through holes respectively corresponding to the light guide limitations. The word keys are respectively located above the through holes, and each of the word keys has at least one light transmitting portion opposite to each of the through holes.

The effect of the novel is that the light guide plate is divided into the light guide localities corresponding to the word keys respectively through the structural design of the light guide blocking spaces of the light guide plate, and the light guide locality corresponds to a light source corresponding to a light source. The design is set such that the brightness of each light guide limitation is controlled by a single light source, and is not affected by the remaining light sources, so that the light-emitting brightness of the light guide localities is uniform and close to the light-emitting brightness of each light source, thereby allowing The light-emitting brightness of the light-transmitting portions of the word keys is uniform, so that when the light-emitting keyboard of the present invention is used in a dark place, the user can more easily recognize the letter symbols on the word keys.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 , a first embodiment of the present invention includes a backlight module 100 and a keyboard module 200 .

Referring to FIG. 2 , FIG. 3 and FIG. 4 , the backlight module 100 includes a light guide plate 1 , a reflector 2 , a light shielding plate 3 , and a light emitting unit 4 . The light guide plate 1 has a bottom light-incident surface 11 , a top-in and light-emitting surface 12 opposite to the bottom light-incident surface 11 , and a circumferential surface connected between the bottom light-incident surface 11 and the periphery of the top-in and-out light-emitting surface 12 . 13. The plurality of light guides block the space 14, and the plurality of light source sets the space 15. The light guide blocking spaces 14 cooperate to divide the light guide plate 1 into a plurality of light guide confinements 16 . The light source setting spaces 15 are respectively located in the light guide limiting portions 16. In this embodiment, the structure of each of the light-guiding blocking spaces 14 is a through-hole extending through the bottom light-incident surface 11 and the top-in and light-emitting surface 12, and each light source setting space 15 is a through-in and out-out surface 11 and the top. The through holes of the light-emitting surface 12 are not limited thereto, and each of the light source installation spaces 15 may be a recess formed in the bottom light-incident surface 11 .

The reflector 2 is disposed on the bottom entrance and exit surface 11 and has a plurality of light source through holes 21 respectively corresponding to the light source installation spaces 15. In this embodiment, the reflector 2 is a retroreflective sheeting, but not limited thereto, and may be a reflective film layer attached to the bottom entrance and exit surface 11.

The light shielding sheet 3 is disposed on the top surface of the light guide plate 1 , and the light shielding sheet 3 includes a plurality of light transmitting regions 31 respectively corresponding to the light guiding portions 16 .

The light-emitting unit 4 includes a circuit board 41 disposed on the bottom side of the reflector 2, and a plurality of light sources 42 disposed on the circuit board 41. The light sources 42 are respectively disposed in the light source through holes 21 and are respectively disposed in the light source installation spaces 15 . In the present embodiment, each of the light sources 42 is a light-emitting diode (LED) that emits light laterally and has an illumination angle θ of less than 180 degrees.

Referring to FIG. 3, each of the light-guiding blocking spaces 14 is arranged in a U-shape and the U-shaped opening faces the light-emitting side of the corresponding light source 42, and each of the light-guiding blocking spaces 14 has a blocking connection with respect to the light-emitting side of the corresponding light source 42. The base segments 141 and 1-2 are respectively disposed on the opposite end sides of the blocking base segment 141 toward the corresponding light source 42 and the blocking side segments 142 respectively disposed between the blocking side segments 142 and the blocking base segment 141. Block 143. The opposite ends of each of the oblique blocking sections 143 are respectively directed to the adjacent blocking side section 142 and the blocking base section 141, respectively. In this embodiment, each of the two adjacent light guide blocking spaces 14 share the same blocking side section 142, and referring to FIG. 5, FIG. 6, and FIG. 7, the light guiding blocking spaces 14 are adjacent to the circumference of the light guiding plate 1. At least one of the blocking base portion 141, the blocking side segments 142, and the oblique blocking portions 143 of the surface 13 is formed at the circumferential surface 13.

Wherein, after the illuminating angle θ of each of the light sources 42 has been determined, the blocking base portion 141 of the light guiding block spaces 14 , the blocking side segments 142 and the oblique blocking segments 143 extend and the light source 42 The relative arrangement position is obtained by calculation, so that the light emitted by each light source 42 can be confined in the respective light guide confinement portions 16 even when the respective light guide blocking spaces 14 are not surrounding the respective light sources 42.

It is worth mentioning that, since the blocking base section 141, the blocking side sections 142 and the oblique blocking sections 143 of the light guiding blocking spaces 14 are not connected, the light guiding blocking space 14 is a through hole structure. In the form, the light-transmitting plate 1 is not divided into the plurality of phase-separated small plates by the light-guiding blocking spaces 14, and the integrity of the single plate can be maintained to facilitate the assembly work.

It is to be noted that the structure of each of the light-guiding barrier spaces 14 is not limited to the above-mentioned through-holes, and may be a recess formed in the top-in and out-out surface 12 of the light guide plate 1 as shown in FIG. And adjusting the height of each light source 42 in the light guide plate 1 so that the light emitted by each light source 42 can be blocked by the groove, and is not conducted by the portion of the light guide plate 1 located under the groove. The light-guiding blocking spaces 14 can also achieve the effect of limiting the light emitted by the light sources 42 to the respective light guiding portions 16. Further, each of the light-guiding blocking spaces 14 can also be formed as a recess as shown in FIG. a top groove and a recess of the top surface of the light guide plate 1 are formed in a combination of the bottom groove of the bottom light entrance and exit surface 11 of the light guide plate 1, and the top groove and the adjacent bottom groove are portions The overlapping, thereby being equivalent to the shape of the through-hole structure, limits the light resistance emitted by each of the light sources 42 to the outside.

Referring to FIG. 2, FIG. 3 and FIG. 4, the keyboard module 200 is disposed on the top surface of the light guide plate 1 of the backlight module 100, and the keyboard module 200 includes a bottom plate 5, and a plurality of The bottom plate 5 and the word key 6 corresponding to the light guide limitation portion 16 and a transparent circuit film 7 disposed between the bottom plate 5 and the word keys 6 respectively. The bottom plate 5 has a plurality of through holes 51 respectively corresponding to the light guide limiting portions 16, and the through holes 51 respectively overlap the light transmitting regions 31 of the light shielding sheet 3. The word keys 6 are respectively located above the through holes 51, and each of the word keys 6 has at least one light transmitting portion 61 opposite to each of the through holes 51, so that the light emitted by the respective light guiding portions 16 can be penetrated. The light transmitting portion 61 of each of the word keys 6 is an alphabetic symbol to be displayed by each of the word keys 6. In this embodiment, each of the word keys 6 is disposed on the bottom plate 5 so as to be movable up and down through a scissor foot supporting mechanism 62 and an elastic member 63, and the triggering signal is generated by the elastic member 63 contacting the transparent circuit film 7. . However, the component composition and the component structure of the keyboard module 200 are conventional structures, and are not described herein again, and are not limited to the disclosure of the present disclosure.

It can be seen from the above description that the light-emitting keyboard of the present invention is designed to pass through the structure of the light-guiding barrier spaces 14 of the light guide plate 1 , and the light guide plate 1 is divided into the light guide limiting portions 16 corresponding to the word keys 6 respectively. The light guide limitation portion 16 is designed corresponding to the light source of a light source 42 such that the light emission brightness of each light guide limitation portion 16 is controlled by the single light source 42 without being affected by the remaining light sources 42, so that the light emission brightness of the light guide limitation portions 16 is Uniform and close to the light-emitting brightness of each light source 42 , so that the light-emitting brightness of the light-transmitting portion 61 of the word keys 6 is uniform, so that the user can more easily identify each light-emitting keyboard when used in a dark place. The letter symbol on word key 6.

Referring to FIG. 10 and FIG. 11 , a second embodiment of the illuminating keyboard of the present invention is substantially the same as the first embodiment, except that each of the light guide blocking spaces 14 of the light guide plate 1 has a U-shaped continuous space extending around. And the U-shaped opening faces the light-emitting side of the corresponding light source 42, and the light source setting spaces 15 are connected to the adjacent light-guide blocking spaces 14. In the present embodiment, each of the two adjacent light guide blocking spaces 14 is a shared partial space, that is, the left and right side portions of the U-shape. The light guide blocking spaces 14 are adjacent to the number of the peripheral faces 13 of the light guide plate 1, and a part of the space is formed at the peripheral surface 13.

Similarly, the light-guiding blocking spaces 14 can also restrict the light emitted by the light sources 42 from being confined in the respective light guiding portions 16, so that the second embodiment of the present invention can also reach the light-transmitting portions 61 of the word keys 6. The luminous efficacy of uniform brightness benefits.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

100‧‧‧Lighting module
200‧‧‧ keyboard module
1‧‧‧Light guide plate
11‧‧‧Bottom and light
12‧‧‧In and out of the glossy surface
13‧‧‧Week
14‧‧‧Light guides
141‧‧‧Resist the base section
142‧‧‧Stop the side
143‧‧‧ oblique obstruction
15‧‧‧Light source setting space
16‧‧‧Light Guides
2‧‧‧Reflecting parts
21‧‧‧Light source perforation
3‧‧‧shading film
31‧‧‧Transparent area
4‧‧‧Lighting unit
41‧‧‧ boards
42‧‧‧Light source
5‧‧‧floor
51‧‧‧through hole
6‧‧‧ word key
61‧‧‧Transmission Department
62 ‧‧‧Knife foot support mechanism
63 ‧‧‧Flexible parts
7 ‧‧‧Transparent circuit film θ‧‧‧Lighting angle

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a plan view of a first embodiment of the present illuminating keyboard; Figure 2 is a first embodiment of the first embodiment FIG. 3 is a partially enlarged plan view of the first embodiment, illustrating the arrangement relationship between a backlight module and a keyboard module of the first embodiment; FIG. 4 is a line IV-IV of FIG. The obtained incomplete sectional view illustrates the arrangement relationship between the backlight module and the keyboard module of the first embodiment; FIG. 5 is a partially enlarged plan view of a light guide plate of the first embodiment, illustrating the light guide plate Figure 6 is a view similar to Figure 5, showing a distribution of light-shielding spaces at a plurality of adjacent circumferential surfaces of the light guide plate; Figure 7 is a view similar to Figure 5 FIG. 8 is a partially enlarged plan view showing the structure of the light guide blocking space of the light guide plate in the first embodiment. FIG. 9 is a partially enlarged plan view showing the structure of each light guide blocking space of the light guide plate of the first embodiment as a combination of a top groove and a bottom groove; FIG. 10 is a top view showing the new type; A structural view of a light guide plate of a second embodiment of the illuminated keyboard; and FIG. 11 is a view similar to FIG. 4, illustrating the arrangement relationship between a backlight module and a keyboard module of the second embodiment.

100‧‧‧Lighting module

3‧‧‧shading film

200‧‧‧ keyboard module

31‧‧‧Transparent area

1‧‧‧Light guide plate

4‧‧‧Lighting unit

12‧‧‧In and out of the glossy surface

41‧‧‧ boards

13‧‧‧Week

42‧‧‧Light source

14‧‧‧Light guides

5‧‧‧floor

15‧‧‧Light source setting space

6‧‧‧ word key

16‧‧‧Light Guides

61‧‧‧Transmission Department

2‧‧‧Reflecting parts

7‧‧‧Transparent circuit film

21‧‧‧Light source perforation

Claims (10)

A backlight module comprising: a light guide plate comprising a bottom entrance and exit light surface, a top entrance and exit light surface opposite to the bottom entrance and exit light surface, a connection between the bottom entrance and exit light surface and the periphery of the top entrance and exit light surface a peripheral surface, and a plurality of light-conducting blocking spaces, wherein the light-guiding barrier spaces cooperate to divide the light guide plate into a plurality of light guide localities; a light reflecting member disposed on the bottom light-incident surface; and a light-emitting unit including a plurality of light-emitting units respectively disposed thereon The light source of the light guide limitation portion; wherein the light guide blocking spaces are used to limit the light emitted by each light source to be confined in the respective light guide limits. The backlight module of claim 1, wherein each of the light sources is laterally illuminated, and each of the light guide blocking spaces is substantially U-shaped and the U-shaped opening faces the light-emitting side of the corresponding light source. The backlight module of claim 2, wherein a portion of the photoconductive blocking spaces is formed at the circumferential surface of the light guide plate. The backlight module of claim 2, wherein each of the light-guiding barrier spaces has a blocking base portion that is not connected to the light-emitting side of the corresponding light source, and two corresponding to the opposite end sides of the blocking base segment respectively a blocking side section of the light source extending, and two obliquely blocking sections respectively disposed between the blocking side section and the blocking base section, wherein the opposite ends of each oblique blocking section respectively point to the adjacent blocking side section and the blocking base section . The backlight module of claim 4, wherein at least one of the blocking base segment, the blocking side segments, and the oblique blocking segments of the plurality of light guiding blocking spaces are formed on the light guide plate The circumference is at the surface. The backlight module of any one of claims 1 to 5, wherein each of the light-guiding barrier spaces has a structural shape of a recess formed in the top-in and out-out surface. The backlight module according to any one of claims 1 to 5, wherein each of the light-guiding barrier spaces has a through-hole that penetrates the bottom light-incident surface and the top-in and out-out light surface. The backlight module of any one of claims 1 to 5, wherein each of the light sources is a light emitting diode. The backlight module of any one of claims 1 to 5, further comprising a light shielding film disposed on the top surface of the light guide plate, the light shielding film comprising a plurality of light transmissions respectively corresponding to the light guiding portions Area. An illuminated keyboard, comprising: the backlight module of any one of claims 1 to 9; and a keyboard module disposed on the top surface of the light guide plate of the backlight module, and comprising a The bottom plate and the plurality of bottom plates are respectively disposed on the bottom plate and are respectively corresponding to the word keys of the light guide limitation portion, and the bottom plate has a plurality of through holes respectively corresponding to the light guide limitation portions, wherein the word keys are respectively located above the through holes And each of the word keys has at least one light transmitting portion opposite to each of the through holes.