CN202749279U - Keyboard apparatus having backlight module group - Google Patents
Keyboard apparatus having backlight module group Download PDFInfo
- Publication number
- CN202749279U CN202749279U CN201220413970.0U CN201220413970U CN202749279U CN 202749279 U CN202749279 U CN 202749279U CN 201220413970 U CN201220413970 U CN 201220413970U CN 202749279 U CN202749279 U CN 202749279U
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- China
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- light
- backlight module
- guide plate
- light guide
- transmission film
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Abstract
A keyboard apparatus having a backlight module group includes a button-group unit and a backlight module-group unit, wherein the button-group unit comprises a plurality of buttons, the backlight module-group unit is arranged below the button-group unit and comprises a light guide plate, a plurality of light guide points formed on the bottom of the light guide plate, an upper light-penetration film mounted on the top of the light guide plate, a lower light-penetration film which is disposed on the bottom of the light guide plate and cladding the light guide points and a luminescent element. The upper and lower light-penetration films are respectively provided with refractive index lower than the light guide plate, so that light generates a full-internal reflection effect between the upper and lower light-penetration films. The light guide points are utilized to enable the light incident to the light guide points to pass through the upper light-penetration film in a radiation manner and the button is brightened, thereby achieving an excellent light guide effect.
Description
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
Consult Fig. 1, the keyboard with backlight module 1 in the past comprises a circuit board 11, and is located at the insulation top layer 10, of these circuit board 11 tops and is located at the backlight module 14 that the base plate 12 of these circuit board 11 belows, a plurality of buttons 13 and of being located at these insulation top layer 10 tops are located at these base plate 12 belows.Each button 13 comprises a keycap 131, a shear type frame 132 and a rubber washer 133.This backlight module 14 comprises that a light guide plate 141, a plurality of light guiding points 142, of being located at this bottom surface of light guide plate be located at the light source 144 that the opaque reflecting plate 143 and of described light guiding points 142 belows is located at these light guide plate 141 1 sides.
Light by 144 incidents of this light source advances in this light guide plate 141, and makes light to the directional divergence of described button 13 via described light guiding points 142 again.Although the light reflection that this reflecting plate 143 is available for leaking outside from these light guide plate 141 bottom surfaces returns this light guide plate 141, but directly disperse to the light of these light guide plate 141 end faces and can run off or be absorbed without described light guiding points 142, so that the light in this light guide plate 141 reduces gradually, therefore in the past backlight module 14 remains desirable not to the utmost at the conduction efficiency of light.Especially, more and more in the slimming, how making this backlight module device still have good light guide effect has become research topic important on this field at this backlight module 14.
Summary of the invention
The purpose of this utility model is to provide a kind of key board unit with backlight module that can promote light guide effect.
The utlity model has the key board unit of backlight module, comprise a key groups unit and a backlight module unit.
This key groups unit comprises a plurality of buttons.
This backlight module unit, be arranged at the below of this key groups unit, comprise a slice light guide plate, a plurality ofly be formed at this bottom surface of light guide plate and the light guiding points corresponding with described button, upper light transmission film that one deck is arranged at this light guide plate end face, one deck and should upper light transmission film be arranged at accordingly this bottom surface of light guide plate and coat the lower light transmission film of described light guiding points, and the light-emitting component that the light that is incident to this light guide plate is provided.
Should have respectively a refractive index that is lower than this light guide plate with this time light transmission film by upper light transmission film, and so make light generation total internal reflection effect (total internal reflection effect) between light transmission film and this time light transmission film on this.Described light guiding points makes the divergence of beam that is incident to described light guiding points shine described button by light transmission film on this.
Preferably, this backlight module unit comprises that one deck is coated this time light transmission film below and for the reflective ink lay that is used for light reflection is returned this light guide plate, and one be arranged at the top of light transmission film on this and for the shading element that is used for avoiding light to leak outside, this shading element has the opening that a plurality of and described light guiding points is corresponding and confession light passes through.
Preferably, this backlight module unit comprises a perforation that is arranged in light transmission film on this, this light guide plate, this time light transmission film and this reflective ink lay, and this light-emitting component is arranged in this perforation.
Preferably, this shading element is that a slice is arranged at the top of light transmission film on this and hides the shadow shield of this perforation.
Preferably, this shading element is the black out ink that one deck is coated the top of light transmission film on this, and this backlight module unit comprises that one is arranged at this on the light transmission film top and for the overhead gage that is used for this perforation of covering.
Preferably, this backlight module unit comprises that one deck is coated below this reflective ink lay and for the black-out ink layer that is used for avoiding light to leak outside.
Preferably, this key board unit with backlight module comprises the side shield that at least one is arranged at around this light guide plate and supplies to be used for avoiding the light side leakage.
Preferably, this key groups unit comprises that insulation film, a slice that one deck is arranged at described button below are arranged at this insulation film below and for the film circuit board that is used for triggering keying signal, and one is arranged at this film circuit board below and for the strutting piece that is used for supporting described button, this insulation film and this film circuit board.
Preferably, described light guiding points is the light guide ink of coating this bottom surface of light guide plate, makes light reflection to described button for being used for.
Preferably, each light guiding points is to have a plurality of micro-structurals that are formed at this bottom surface of light guide plate, makes light scattering to described button for being used for.
The beneficial effects of the utility model are: by the refractive index difference between this upper and lower light transmission film and this light guide plate, make light in this light guide plate, produce the total internal reflection effect, thereby the conducting effect of enhancement light, recycle the effect of described light guiding points, described corresponding button is accepted through the light of guiding and shinny.
Description of drawings
Fig. 1 is a cross sectional side view, and the keyboard with backlight module in the past is described;
Fig. 2 is a cross sectional side view, and the first preferred embodiment of the key board unit that the utlity model has backlight module is described; And
Fig. 3 is a cross sectional side view, and the second preferred embodiment of the key board unit that the utlity model has backlight module is described.
Embodiment
Below in conjunction with drawings and Examples the utility model is elaborated.
Before the utility model is described in detail, be noted that in the following description content, similarly element is to represent with identical numbering.
Consult Fig. 2, one first preferred embodiment that the utlity model has the key board unit of backlight module comprises a key groups unit 2, a backlight module unit 3 and two side shields 4.
This key groups unit 2 comprises that insulation film 22, a slice that a plurality of buttons 21 (only being used as illustrating with two buttons 21), one deck are arranged at described button 21 belows are arranged at these insulation film 22 belows and for the film circuit board 23 that is used for triggering keying signal in Fig. 2, and one is arranged at these film circuit board 23 belows and for the strutting piece 24 that is used for supporting described button 21, this insulation film 22 and this film circuit board 23.
Each button 21 has the shear type frame 212 that a keycap that can Gong press 211, is located at this keycap 211 and 22 of this insulation films and can be supported up or down this keycap 211, and one is located at the elastic component 213 that this keycap 211 and 22 of this insulation films and confession are used for pressing this film circuit board 23.In this preferred embodiment, this elastic component 213 is rubber washers; And this strutting piece 24 is base plates, and it can be made by metal or plastic cement, but not as limit.
This backlight module unit 3 is arranged at the below of this key groups unit 2, and comprises on a slice light guide plate 31, a plurality of light guiding points 311, one deck light transmission film 33, the reflective ink lay 34 of one deck, shading element 35, one deck black-out ink layer 37 and a light-emitting component 38 under light transmission film 32, one deck.
The surfacing of this light guide plate 31 and height printing opacity, the material that wherein is applicable to make this light guide plate 31 comprises, but be not limited to following: polymethyl methacrylate (polymethyl methacrylate, PMMA, refractive index approximately 1.49), polypropylene (polypropylene, PP, refractive index approximately 1.49), polyethylene terephthalate (polyethylene terephthalate, PET, refractive index approximately 1.58), Merlon (polycarbonate, PC, refractive index approximately 1.59) and polystyrene (polystyrene, PS, refractive index approximately 1.59) etc.
Described light guiding points 311 is formed at the bottom surface of this light guide plate 31 and corresponding with described button 21, for being used for the light guiding is dispersed to the direction of described button 21.In this preferred embodiment, described light guiding points 311 is applied in the light guide ink of these light guide plate 31 bottom surfaces via mode of printing, makes light reflection to described button for being used for.But not as limit, each light guiding points 311 also can be a plurality of micro-structurals that are formed at these light guide plate 31 bottom surfaces one-body moldedly, described micro-structural can be continuous V-groove or continuous sag and swell (not shown), makes light scattering to described button for being used for.
Should upper light transmission film 32 be that one deck is arranged at the end face of this light guide plate 31 and the transparent membrane that refractive index is lower than this light guide plate 31.This time light transmission film 33 is that one deck is arranged at the bottom surface of this light guide plate 31 and the transparent membrane that refractive index is lower than this light guide plate 31, and envelopes simultaneously described light guiding points 311 with upward light transmission film 32 is corresponding.
In this preferred embodiment, light transmission film 32 and this time light transmission film 33 are respectively light-cured resins via ultraviolet light (UV) curing on this, or an optical coating.Preferably, light transmission film 32 and this time light transmission film 33 are made by identical material and have identical refractive index on this.Preferably, light transmission film 32 and this time light transmission film 33 also can be made by unlike material and have different refractive indexes on this.
The light-cured resin or the optical filming material that are applicable to make light transmission film 32 on this and this time light transmission film 33 include, but are not limited to following: acrylic resin (acrylic resin, refractive index approximately 1.41), magnesium fluoride (MgF
2, refractive index approximately 1.38), barium fluoride (BaF
2, refractive index approximately 1.48) and silicon dioxide (SiO
2, refractive index approximately 1.46) etc.About selecting of above-mentioned material, not as limit, key is to make light transmission film 32 on this and this time light transmission film 33 to have respectively a refractive index that is lower than this light guide plate 31, so that light produces the total internal reflection effect in this light guide plate 31.
This reflective ink lay 34 is that one deck is coated the reflective printing ink below this time light transmission film 33, will return from the light reflection that this time light transmission film 33 leaks outside this light guide plate 31 for being used for, with the utilance of raising light.In this preferred embodiment, employed reflective printing ink is available from Shanghai Feikai Photoelectricity Materials Co., Ltd (Shanghai Phichem Corporation), product type KYC-M-100C.
This shading element 35 is that a slice is arranged at light transmission film 32 tops on this and for the shadow shield that is used for avoiding light to leak outside, and has the corresponding opening 36 of a plurality of and described light guiding points 311, and described opening 36 can pass through and to the directional divergence of described button for light.
This black-out ink layer 37 is that one deck is coated the black out ink below this reflective ink lay 34, for being used for avoiding light to leak outside and can avoid damage for the protection of this light guide plate 31 simultaneously from this reflective ink lay 34.In this preferred embodiment, employed black out ink is available from Shanghai Feikai Photoelectricity Materials Co., Ltd (Shanghai Phichem Corporation), product type KYC-D-1.
This backlight module unit 3 comprises that also one wears the perforation 39 of light transmission film 32 on this, this light guide plate 31, this time light transmission film 33, this reflective ink lay 34 and this black-out ink layer 37 simultaneously.A side and top that this perforation 39 is arranged at this light guide plate 31 are hidden by this shading element 35, and this shading element 35 can stop that the light in this perforation 39 upwards leaks outside.
This light-emitting component 38 is arranged in this perforation 39, for being used for the light side direction is incident to this light guide plate 31.In this preferred embodiment, this light-emitting component 38 comprises a light-emitting diode, but not as limit, is familiar with in the art this skill person and also this light-emitting component 38 can be designed to more than one light-emitting diode or the light source of other types.
Described side shield 4 be arranged at this light guide plate 31 around and seal this light guide plate 31, the side of light transmission film 32 and this time light transmission film 33 this on, confession is for avoiding the light side leakage.
Consult Fig. 3, the difference that the utlity model has one second preferred embodiment of key board unit of backlight module and this first preferred embodiment be in: in this first preferred embodiment, this shading element 35 is that a slice is arranged at light transmission film 32 tops on this and can hides the shadow shield of this perforation 39; But in this second preferred embodiment, this shading element 35 is black out ink (its material is identical with this black-out ink layer 37) that one deck is coated light transmission film 32 tops on this, described shading element 35 has the opening 36 that a plurality of and described light guiding points 311 is corresponding and can pass through for light, and this backlight module unit 3 comprises that also one is arranged at this on light transmission film 32 tops and for the overhead gage 30 that is used for this perforation 39 of covering.
According to two preferred embodiments of the present utility model, should upper light transmission film 32 and this time light transmission film 33 have respectively a refractive index that is lower than this light guide plate 31, therefore and make light light transmission film 32 and this time light transmission film 33 (that is to say between the end face and bottom surface of this light guide plate 31) on this can produce the total internal reflection effect, and then conduction and the utilization of promotion light.
Especially, the light that is incident to described light guiding points 311 can upwards be dispersed the light that generation has different incidence angles degree (incident angle), wherein the part incident angle can't the experiences total internal reflection effect less than the light of a critical angle (critical angle), therefore can upwards exhale by light transmission film on this 32, and open 36 and so that described button 21 is shinny by described; Another part incident angle then can again produce the total internal reflection effect and continue to conduct in this light guide plate 31 greater than the light of this critical angle and advance.
In sum, the light total internal reflection effect that causes by light transmission film on this 32 and this time light transmission film 33, can make light in this light guide plate 31, ceaselessly carry out total internal reflection, therefore can increase conduction and the utilization of light, recycle described light guiding points 311 and then make described button 21 shinny, so really can reach the purpose of this utility model.
The above person, it only is preferred embodiment of the present utility model, when not limiting the scope that the utility model is implemented with this, i.e. all simple equivalences of doing according to the utility model claims and specification change and modify, and all still belong to the scope of the utility model patent.
Claims (10)
1. key board unit with backlight module is characterized in that:
This key board unit with backlight module comprises:
A key groups unit comprises a plurality of buttons; And
A backlight module unit, be arranged at the below of this key groups unit, comprise a slice light guide plate, a plurality ofly be formed at this bottom surface of light guide plate and the light guiding points corresponding with described button, upper light transmission film that one deck is arranged at this light guide plate end face, one deck and should upper light transmission film be arranged at accordingly this bottom surface of light guide plate and coat the lower light transmission film of described light guiding points, and the light-emitting component that the light that is incident to this light guide plate is provided;
Should upper light transmission film have respectively a refractive index that is lower than this light guide plate with this time light transmission film so that light generation total internal reflection effect between light transmission film and this time light transmission film on this, described light guiding points makes the divergence of beam that is incident to described light guiding points shine described button by light transmission film on this.
2. the key board unit with backlight module according to claim 1, it is characterized in that: this backlight module unit comprises also that one deck is coated this time light transmission film below and for the reflective ink lay that is used for light reflection is returned this light guide plate, and one be arranged at the top of light transmission film on this and for the shading element that is used for avoiding light to leak outside, this shading element has the opening that a plurality of and described light guiding points is corresponding and confession light passes through.
3. the key board unit with backlight module according to claim 2, it is characterized in that: this backlight module unit also comprises a perforation that is arranged in light transmission film on this, this light guide plate, this time light transmission film and this reflective ink lay, and this light-emitting component is arranged in this perforation.
4. the key board unit with backlight module according to claim 3 is characterized in that: this shading element is that a slice is arranged at light transmission film top on this and hides the shadow shield of this perforation.
5. the key board unit with backlight module according to claim 3, it is characterized in that: this shading element is the black out ink that one deck is coated the top of light transmission film on this, and this backlight module unit comprises that also one is arranged at this on the light transmission film top and for the overhead gage that is used for this perforation of covering.
6. the key board unit with backlight module according to claim 3 is characterized in that: this backlight module unit comprises that also one deck coats below this reflective ink lay and for the black-out ink layer that is used for avoiding light to leak outside.
7. the key board unit with backlight module according to claim 6 is characterized in that: this key board unit with backlight module also comprises at least one and is arranged at around this light guide plate and for the side shield that is used for avoiding the light side leakage.
8. the key board unit with backlight module according to claim 1, it is characterized in that: this key groups unit comprises also that insulation film, a slice that one deck is arranged at described button below are arranged at this insulation film below and for the film circuit board that is used for triggering keying signal, and one is arranged at this film circuit board below and for the strutting piece that is used for supporting described button, this insulation film and this film circuit board.
9. the key board unit with backlight module according to claim 1, it is characterized in that: described light guiding points is the light guide ink of coating this bottom surface of light guide plate, makes light reflection to described button for being used for.
10. the key board unit with backlight module according to claim 1, it is characterized in that: each light guiding points has a plurality of micro-structurals that are formed at this bottom surface of light guide plate, makes light scattering to described button for being used for.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220413970.0U CN202749279U (en) | 2012-08-21 | 2012-08-21 | Keyboard apparatus having backlight module group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220413970.0U CN202749279U (en) | 2012-08-21 | 2012-08-21 | Keyboard apparatus having backlight module group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202749279U true CN202749279U (en) | 2013-02-20 |
Family
ID=47708640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220413970.0U Expired - Lifetime CN202749279U (en) | 2012-08-21 | 2012-08-21 | Keyboard apparatus having backlight module group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202749279U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091713A (en) * | 2014-03-18 | 2014-10-08 | 苏州达方电子有限公司 | Backlight device and light-emitting keyboard |
| CN104252989A (en) * | 2013-06-25 | 2014-12-31 | 致伸科技股份有限公司 | Light emitting keyboard device |
| CN104252987A (en) * | 2013-06-25 | 2014-12-31 | 致伸科技股份有限公司 | An illuminant keyboard device |
| CN104992869A (en) * | 2015-07-15 | 2015-10-21 | 苏州达方电子有限公司 | Backlight module and keyboard comprising same |
| CN106356213A (en) * | 2015-07-16 | 2017-01-25 | 三星电机株式会社 | Key assembly |
| CN106710929A (en) * | 2017-01-19 | 2017-05-24 | 苏州达方电子有限公司 | Illuminating keyboard and illuminating keypads thereof |
-
2012
- 2012-08-21 CN CN201220413970.0U patent/CN202749279U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104252989A (en) * | 2013-06-25 | 2014-12-31 | 致伸科技股份有限公司 | Light emitting keyboard device |
| CN104252987A (en) * | 2013-06-25 | 2014-12-31 | 致伸科技股份有限公司 | An illuminant keyboard device |
| CN104091713A (en) * | 2014-03-18 | 2014-10-08 | 苏州达方电子有限公司 | Backlight device and light-emitting keyboard |
| CN104091713B (en) * | 2014-03-18 | 2016-03-30 | 苏州达方电子有限公司 | Back lighting device and illuminated keyboard |
| CN104992869A (en) * | 2015-07-15 | 2015-10-21 | 苏州达方电子有限公司 | Backlight module and keyboard comprising same |
| CN106356213A (en) * | 2015-07-16 | 2017-01-25 | 三星电机株式会社 | Key assembly |
| CN106356213B (en) * | 2015-07-16 | 2020-02-11 | 三星电机株式会社 | Key assembly |
| CN106710929A (en) * | 2017-01-19 | 2017-05-24 | 苏州达方电子有限公司 | Illuminating keyboard and illuminating keypads thereof |
| CN106710929B (en) * | 2017-01-19 | 2019-02-05 | 苏州达方电子有限公司 | Illuminated keyboard and its luminous button |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |
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| CX01 | Expiry of patent term |