CN202307644U

CN202307644U - Keyboard apparatus having backlight module

Info

Publication number: CN202307644U
Application number: CN 201120433967
Authority: CN
Inventors: 张清
Original assignee: Changshu Sunrex Technology Co Ltd
Current assignee: Changshu Sunrex Technology Co Ltd
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-07-04
Anticipated expiration: 2021-11-04

Abstract

Provided is a keyboard apparatus having a backlight module, comprising a button set unit and a backlight module, wherein the button set unit comprises a first button and a second button; the backlight module, arranged below the button set unit, comprises a luminous element, a first light guide plate, a second light guide plate below the first light guide plate, a first light reflecting part arranged between the first light guide plate and the second light guide plate and corresponding to the first button, and a second light reflecting part arranged below the second light guide plate and corresponding to the second button; the rays entering the first light guide plate from the luminous element are reflected toward the first button via the first light reflecting part; and the rays of the luminous element entering the second light guide plate are reflected toward the second button via the second light reflecting part, thereby improving and evenly dividing the brightness of the buttons.

Description

Key board unit with backlight module

Technical field

The utility model relates to a kind of key board unit, particularly relates to a kind of key board unit with backlight module.

Background technology

Existing illuminated keyboard is as shown in Figure 1; Below most buttons 11, backlight module 12 is set, backlight module 12 comprises that a light-emitting component 121, is arranged on the LGP 122 of said button 11 belows, the corresponding said button 11 of quantity and is arranged on the photo-emission part 123 of LGP 122 belows.The light that LGP 122 guiding light-emitting components 121 send when light is passed through photo-emission part 123, makes light reflex to each button 11.When the user under the environment that the light is dusky, the symbol on each button 11 still can manifest handled easily.So inequality with light-emitting component 121 distances because of each button 11, when button 11 was more and more far away apart from light-emitting component 121, light can fail gradually, causes the printing opacity brightness of each button 11 different then, makes the light transmittance of illuminated keyboard inhomogeneous.

Summary of the invention

But the purpose of the utility model is to provide a kind of key board unit with backlight module of even light-guiding effect.

The utlity model has the key board unit of backlight module, comprise a key groups unit and a backlight module.This key groups unit comprises one first button, one second button.This backlight module is arranged on this below, key groups unit; And comprise that second LGP, that a light-emitting component, one first LGP, be positioned at this first LGP below is between between this first LGP and this second LGP and to first photo-emission part that should first button; And one be positioned at this second LGP below and to second photo-emission part that should second button; Towards this first button reflection, the light of this this second LGP of light-emitting component incident reflects towards this second button through this second photo-emission part the light of this this first LGP of light-emitting component incident through this first photo-emission part.

Preferably, this first LGP has a bottom surface, and this first photo-emission part is a reflective printing ink of coating this first bottom surface of light guide plate, and this second LGP has a bottom surface, and this second photo-emission part is a reflective printing ink of coating this second bottom surface of light guide plate.

Preferably, this backlight module also comprises the flexible circuit board that is arranged on this light-emitting component below and is electrically connected with this light-emitting component, and the reflecting plate that is arranged on below this second LGP.

Preferably, this key groups unit also comprise one be arranged on this first button and this second button below top layer, the film circuit board, that is arranged on this top layer below be provided with and be supported on the base plate of this film circuit board below.

Preferably, this first button comprises a keycap, is arranged on a scissors support and a flexible member of this keycap below; This second button comprises a keycap, is arranged on a scissors support and a flexible member of this keycap below, and the bottom of the scissors support of this first button and this second button is arranged at this top layer.

Preferably, this top layer is a plastic film.

Preferably, this light-emitting component is a light-emitting diode.

The effect of the utility model is: be by different LGPs and photo-emission part are set the reflection ray of the button of diverse location to be provided; Avoid the light of same LGP to produce the not enough problem of light luminance owing to warp repeatedly reflects, and then the brightness of illumination of raising and even button.

Description of drawings

Fig. 1 is a cross-sectional schematic, and existing illuminated keyboard is described;

Fig. 2 is a cross-sectional schematic, and the preferred embodiment of the key board unit that the utlity model has backlight module is described, omits flexible member among the figure;

Fig. 3 is a cross-sectional schematic, explains that this has the key board unit of backlight module.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is elaborated.

Consult Fig. 2 and Fig. 3, the preferred embodiment that the utlity model has the key board unit of backlight module comprises the backlight module 3 that a key groups unit 2 and is arranged on 2 belows, key groups unit.

Key groups unit 2 comprises one first button 21, one second button 21 ', and certainly, general key board unit does not have only two buttons 21,21 ', for convenient explanation, is the example explanation with two buttons 21,21 ' only here.More specifically; Key groups unit 2 also comprise one be arranged on first button 21, second button, 21 ' below top layer 22, the film circuit board 23, that is arranged on top layer 22 belows be provided with and be supported on the base plate 24 of film circuit board 23 belows, and a plurality of through hole 25 that wears top layer 22 and film circuit board 23 and base plate 24 and corresponding first button 21, second button 21 '.

First button, 21 concrete structures comprise a keycap 211, are arranged on a scissors support 212 and a flexible member 213 of keycap 211 belows; The structure of second button 21 ' is identical with the structure of first button 21, and comprises a keycap 211, is arranged on a scissors support 212 and a flexible member 213 of keycap 211 belows.What this need explain be, because keycap 211 is various with scissors support 212 combination variety of its below, this preferred embodiment is just listed and is lifted an example and cooperate and do explanation, and for the ease of the reflection path of explanation light, thus among Fig. 2 not with flexible member 213 paint into.The bottom of scissors support 212 is arranged at top layer 22, and the symbol that is formed on the keycap 211 is made with transparent material, can supply light penetration.When the keycap 211 of first button 21, second button 21 ' is pressed, borrow flexible member 213 contact conducting, the circuit signal that the generation correspondence is pushed with film circuit board 23.In this preferred embodiment, top layer 22 is plastic film (Mylar).

Backlight module 3 comprises that a light-emitting component 31, one first LGP 32, are positioned at second LGP 32 ' of first LGP, 32 belows, between between first LGP 32 and second LGP 32 ' and first photo-emission part 33 of corresponding first button 21, and one be positioned at second LGP, 32 ' below and corresponding second button 21 ' second photo-emission part 33 '.And first button 21 than second button 21 ' away from light-emitting component 31.In this preferred embodiment, light-emitting component 31 is light-emitting diode (LED).

Or rather; First LGP 32 has a bottom surface; First photo-emission part 33 is for coating the reflective printing ink of first LGP, 32 bottom surfaces, and second LGP 32 ' has a bottom surface, and second photo-emission part 33 ' is for coating the reflective printing ink of second LGP, 32 ' bottom surface.Backlight module 3 also comprises the flexible circuit board 34 that is arranged on light-emitting component 31 belows and is electrically connected with light-emitting component 31, and one be arranged on second LGP, 32 ' below reflecting plate 35.Reflecting plate 35 reduces light and penetrates downwards, to improve the utilization rate of light.

In the present embodiment; First LGP 32 and second LGP 32 ' are respectively equipped with an opening 361,362; When first LGP 32 and second LGP were mutually stacked about in the of 32 ', two openings 361,362 were corresponding, and light-emitting component 31 is to be positioned at two openings 361,362.

The light of light-emitting component 31 is that side direction is injected first LGP 32 and second LGP 32 '; Wherein, When the light of incident first LGP 32 during through first photo-emission part 33 regional; Light can be through first photo-emission part 33 towards 21 reflections of first button, and the keycap 211 to first button 21 produces illuminating effect whereby; When the light of incident second LGP 32 ' during through second photo-emission part 33 ' regional, light can be through second photo-emission part towards the 21 ' reflection of second button, and the keycap 211 to second button 21 ' produces illuminating effects whereby.

Therefore; The key board unit that the utlity model has backlight module is by the reflection ray that different LGPs (like first LGP 32, second LGP 32 ' of present embodiment) and different photo-emission parts (like first photo-emission part 33, second photo-emission part 33 ' of present embodiment) are set provide the button of diverse location (like first button 21, second button 21 ' of present embodiment); Avoid the light of same LGP to produce the not enough problem of light luminance owing to warp repeatedly reflects; And then the brightness of illumination of raising and even button, so can reach the purpose of the utility model really.

The above; Be merely the preferred embodiment of the utility model; When not limiting the scope that the utility model is implemented with this; Be that all simple equivalent of being done according to the utility model claim and utility model description change and modify, all still belong in the scope that the utility model patent contains.

Claims

1. key board unit with backlight module, comprise: a key groups unit and a backlight module, this key groups unit comprise one first button, one second button, this backlight module is arranged on this below, key groups unit, and comprises a light-emitting component; It is characterized in that: this backlight module also comprise one first LGP, at second LGP below this first LGP, between this first LGP and this second LGP and to first photo-emission part that should first button; And one be positioned at this second LGP below and to second photo-emission part that should second button; Towards this first button reflection, the light of this this second LGP of light-emitting component incident reflects towards this second button through this second photo-emission part the light of this this first LGP of light-emitting component incident through this first photo-emission part.

2. the key board unit with backlight module according to claim 1; It is characterized in that: this first LGP has a bottom surface; This first photo-emission part is a reflective printing ink of coating this first bottom surface of light guide plate; This second LGP has a bottom surface, and this second photo-emission part is a reflective printing ink of coating this second bottom surface of light guide plate.

3. the key board unit with backlight module according to claim 1; It is characterized in that: this backlight module also comprises the flexible circuit board that is arranged on this light-emitting component below and is electrically connected with this light-emitting component, and the reflecting plate that is arranged on below this second LGP.

4. the key board unit with backlight module according to claim 1 is characterized in that: this key groups unit also comprise one be arranged on this first button and this second button below top layer, the film circuit board, that is arranged on this top layer below be provided with and be supported on the base plate of this film circuit board below.

5. the key board unit with backlight module according to claim 4 is characterized in that: this first button comprises a keycap, is arranged on a scissors support and a flexible member of this keycap below; This second button comprises a keycap, is arranged on a scissors support and a flexible member of this keycap below, and the bottom of the scissors support of this first button and this second button is arranged at this top layer.

6. the key board unit with backlight module according to claim 4 is characterized in that: this top layer is a plastic film.

7. the key board unit with backlight module according to claim 1 is characterized in that: this light-emitting component is a light-emitting diode.