CN201417697Y - Light leading plate and thin-film keyboard comprising the same - Google Patents
Light leading plate and thin-film keyboard comprising the same Download PDFInfo
- Publication number
- CN201417697Y CN201417697Y CN2009201643277U CN200920164327U CN201417697Y CN 201417697 Y CN201417697 Y CN 201417697Y CN 2009201643277 U CN2009201643277 U CN 2009201643277U CN 200920164327 U CN200920164327 U CN 200920164327U CN 201417697 Y CN201417697 Y CN 201417697Y
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- Prior art keywords
- refraction
- depression
- light guide
- guide sheet
- light
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- Expired - Lifetime
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Abstract
The present utility model relates to a light leading plate and a thin-film keyboard comprising the same. Concretely, the light leading plate comprises a body comprising a top surface, a bottom surfaceand a light incoming side surface; an arc groove which is positioned between the top surface and the bottom surface of the body and has a first arc refracting surface, and the arc refracting surfaceand the body together defining a convex lateral area and a concave lateral area. When lights go from the light incoming side surface to the body, the lights are refracted through the first arc refracting surface from the convex lateral area and are concentrated in one part of the concave lateral area. Because of the formation of the arc refracting surface, the lighteness of a local region of a secondary bright region can be centralized, when the light leading plate is positioned in the thin-film keyboard, enough lighteness can be provided for an pressing part in the secondary bright region ofthe thin-film keyboard.
Description
Technical field
The membrane keyboard that the utility model relates to a kind of light guide sheet and has this light guide sheet particularly relates to a kind of light guide sheet of the brightness that can strengthen local location and the film key with this light guide sheet.
Background technology
Consult Fig. 1, the membrane keyboard 1 of general electronic installation (for example mobile phone) roughly comprise a keyboard top layer 11, one below keyboard top layer 11 light guide sheet 12 and one or many in order to luminescence component 13 (for example light-emitting diode) by a side incident ray of light guide sheet 12, keyboard top layer 11 is printed with for example numeral or symbol etc. usually, when the ray cast of luminescence component 13 projections is gone into light guide sheet 12, light guide sheet 12 just can provide brightness to keyboard top layer 11, makes numeral or symbol on the keyboard top layer 11 present more showy state in more dim environment.
Yet, because the characteristic of light guide sheet 12 sizes and luminescence component 13 light emission angles, when luminescence component 13 is gone into light guide sheet 12 with ray cast, can be dark inferior clear zone 122 than clear zone 121 in light guide sheet 12 formation one clear zones 121 and a brightness, inferior clear zone 122 be for example among Fig. 1 the both sides corner of light guide sheet 12 contiguous each luminescence component 13 and light guide sheet 12 away from the corner regions of luminescence component 13, add printing ink when printing when more not having light transmission, it is just more weak that 12 of light guide sheet can be provided at the brightness of numeral on these times clear zone 122 or symbol.
Consult Fig. 2 to Fig. 4, the way that in the past solves foregoing problems comprises as shown in Figure 2, prints 121 at light guide sheet 12 end faces; As shown in Figure 3, at light guide sheet 12 end faces V-type groove 122 is set; As shown in Figure 4, run through circular hole 123 in light guide sheet 12 settings, the aforementioned practice all is that the light of desiring to make luminescence component 13 projections to go into light guide sheet 12 inside produces refraction and can appear the inferior clear zone of light guide sheet 12, though those ways can allow light guide sheet 12 interior part light refractions go out light guide sheet 12 and increase the brightness of position on the button top layer in inferior clear zone, but be difficult to control the position that light is concentrated, and its brightness that can increase is also limited.
Therefore, exist light guide sheet and have the demand that the membrane keyboard of light guide sheet further improves.
The utility model content
Therefore, the purpose of this utility model is promptly providing a kind of local light-focusing function that has, and can control the light guide sheet of the position that light gathers.
A kind of light guide sheet of the present utility model comprises a body, has an end face, a bottom surface and a light incident sides; And a deep-slotted chip breaker, between the end face of this body and bottom surface and have one first arc plane of refraction, this first arc plane of refraction goes out a protruding lateral areas and a recessed lateral areas in this body defining; When light enters this body by this light incident sides, produce refraction by the light of this protruding lateral areas by this first arc plane of refraction and concentrate on this one place, recessed lateral areas.
Another light guide sheet of the present utility model comprises a body, has an end face, a bottom surface and a light incident sides; And a depression, being recessed to form and having one by this body bottom surface and be the curved arc plane of refraction of depression, this arc plane of refraction goes out a protruding lateral areas and a recessed lateral areas in this body defining; When light enters this body by this light incident sides, produce refraction by the light of this protruding lateral areas by this arc plane of refraction and concentrate on this one place, recessed lateral areas.
Another purpose of the present utility model is to provide a kind of membrane keyboard with above-mentioned light guide sheet.
So a kind of membrane keyboard of the present utility model comprises a circuit unit, a light guide sheet and a keyboard top layer.This circuit unit comprises that a circuit board and is fixedly arranged on the luminescence component of this circuit board.This light guide sheet is arranged on this circuit board and comprises that a body and is arranged at the deep-slotted chip breaker of this body, this body has an end face, a bottom surface towards this circuit board, a light incident sides towards this luminescence component, this deep-slotted chip breaker is between the end face and bottom surface of this body, this deep-slotted chip breaker has one first arc plane of refraction, and this first arc plane of refraction goes out a protruding lateral areas and a recessed lateral areas in this body defining.This keyboard top layer is arranged on the end face of this light guide sheet body and the upper surface on this keyboard top layer is provided with a plurality of press sections of Gong pushing, wherein contiguous this recessed lateral areas, a press section.
Characteristics of the present utility model are that this deep-slotted chip breaker runs through the end face and the bottom surface of this body.
Characteristics of the present utility model are, this deep-slotted chip breaker runs through this body end face, the bottom surface of this body is recessed to form the depression of this deep-slotted chip breaker of connection, and the local internal face of this depression is depression curved surface shape and defines the second arc plane of refraction of this first arc plane of refraction of connection.
Another membrane keyboard of the present utility model comprises a circuit unit, a light guide sheet and a keyboard top layer.This circuit unit comprises that a circuit board and is fixedly arranged on the luminescence component of this circuit board.This light guide sheet is arranged on this circuit board and comprises a body and a depression, this body has an end face, a bottom surface towards this circuit board, a light incident sides towards this luminescence component, this depression is recessed to form by this body bottom surface and has one and is the curved arc plane of refraction of depression, and this first arc plane of refraction goes out a protruding lateral areas and a recessed lateral areas in this body defining.This keyboard top layer is arranged on the end face of this light guide sheet body and the upper surface on this keyboard top layer is provided with a plurality of press sections of Gong pushing, and wherein a press section is positioned at this depression top.
Characteristics of the present utility model are that this depression runs through this body end face.
Effect of the present utility model is, by forming the arc plane of refraction in light guide sheet, the light in zone thereby can provide press section higher brightness on this keyboard top layer in a place arround concentrating by this.
Description of drawings
Fig. 1 is the schematic diagram of the membrane keyboard of general electronic installation;
Fig. 2 is the cutaway view of light guide sheet end face printing;
Fig. 3 is provided with the cutaway view of V-type groove for the light guide sheet end face;
Fig. 4 runs through the cutaway view of circular hole for the setting of light guide sheet end face;
Fig. 5 is the schematic diagram of first preferred embodiment of membrane keyboard of the present utility model;
Fig. 6 is the plane graph of this first preferred embodiment;
Fig. 7 is the stereogram of first preferred embodiment of the utility model light guide sheet;
Fig. 8 is the partial enlarged drawing of Fig. 6;
Fig. 9 is the stereogram of second preferred embodiment of the utility model light guide sheet;
Figure 10 is the cutaway view of second preferred embodiment of membrane keyboard of the present utility model;
Figure 11 is the stereogram of the 3rd preferred embodiment of the utility model light guide sheet; And
Figure 12 is the cutaway view of the 3rd preferred embodiment of membrane keyboard of the present utility model.
The primary clustering symbol description:
2 membrane keyboards, 32 bottom surfaces
21 circuit units 32 ', 32 " bottom surface
211 circuit boards, 33 light incident sides
212 luminescence components, 34 deep-slotted chip breakers
213 press portion's 34 ' deep-slotted chip breaker
22 keyboard top layers, 341 arc planes of refraction
220 press sections, 341 ' the first arc plane of refraction
342 protruding lateral areas, 221 clear zones
342 ' protruding lateral areas, 222 clear zones
23 press portion 343 recessed lateral areas
3 light guide sheet, 343 ' recessed lateral areas
3 ', 3 " light guide sheet 35 depressions
30 bodies, 351 arc planes of refraction
30 ', 30 " body 35 ' depression
31 end faces, 351 ' the second arc plane of refraction
31 ', 31 " end face
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present utility model, in the following detailed description that cooperates with reference to three graphic preferred embodiments, can clearly present.
Before the utility model is described in detail, be noted that in the following description content similarly assembly is to represent with identical numbering.
Consult Fig. 5 to Fig. 7, first preferred embodiment of the utility model membrane keyboard 2 comprises a circuit unit 21, a light guide sheet 3 and a keyboard top layer 22, and certainly, this membrane keyboard 2 may also comprise the electronic building brick that other are enough to make its normal operation.
In the present embodiment, circuit unit 21 comprises a circuit board 211, at least one luminescence component 212 and a plurality of portion that presses (figure does not show) that is arranged on the circuit board 211 that is fixedly arranged on the circuit board 211, in the present embodiment, luminescence component 212 is light-emitting diode (LED), many luminescence component 212 solid weldings are on circuit board 211, these portions of pressing can be the metal dome shape that is arranged on the circuit board 211 and trigger reed (metal dome), produce triggering signal in the time of can supplying to push.
These deep-slotted chip breakers 34 are between the end face 31 and bottom surface 32 of body 30, and the position that these deep-slotted chip breakers 34 are arranged on the body 30 is part or formed clear zone 222 when luminescence component 212 is projeced into body 30, position at least fully.In the present embodiment, each deep-slotted chip breaker 34 runs through the end face 31 and bottom surface 32 of body 30, each deep-slotted chip breaker 34 has an arc plane of refraction 341, and each arc plane of refraction 341 defines a protruding lateral areas 342 and a recessed lateral areas 343 on body 30, in the present embodiment, the protruding lateral areas 342 of indication be for arc plane of refraction 341 convex shape a side towards the zone, the recessed lateral areas 343 of indication be for arc plane of refraction 341 recess a side towards the zone, when light enters body 30 by light incident sides 33, light towards protruding lateral areas 342 can produce refraction by arc plane of refraction 341 on X-Y plane, form the principle of convex lens and assemble toward a place of recessed lateral areas 343.
Repeatedly put on the end face 31 of body 30 and in order to as the surface of keyboard that can Gong push on keyboard top layer 22, and the upper surface on keyboard top layer 22 is provided with a plurality of press sections 220, the press section 220 of indication can be literal, numeral, symbol or the pattern etc. that are printed in keyboard top layer 22 upper surfaces herein, end sees the purposes of this membrane keyboard and decide, keyboard top layer 22 can integral body be the light-permeable material or at least these press sections 220 be the light-permeable material.And when keyboard top layer 22 is repeatedly put on light guide sheet 3, several press sections 220 on the keyboard top layer 22 are respectively adjacent to the recessed lateral areas 343 of light guide sheet 3 these deep-slotted chip breakers 34, in other words, when the deep-slotted chip breaker 34 of light guide sheet 3 was set, its position was may 220 position, press section in inferior clear zone 222 on the corresponding keys dish cart layer 22.
As shown in Figure 8, when luminescence component 212 during towards light incident sides 33 throw lights of light guide sheet 3 bodies 30, make the part on button top layer 22 push the position though can form clear zone 221 with time clear zone 222 in inferior clear zone 222, but setting by these deep-slotted chip breakers 34 on light guide sheet 3 bodies 30, the light in inferior clear zone 222 is concentrated on a place of recessed lateral areas 343, just can improve the brightness of 3 clear zone 222 local locations of light guide sheet, and then provide 22 on button top layer in the enough brightness in the press section 220 in inferior clear zone 222, and because arc plane of refraction 341 is the thickness that is distributed in whole body 30, therefore, the scope that can gather light is bigger, so the light luminance that is gathered is also than higher.
Therefore, as shown in the above, this case is provided with deep-slotted chip breaker 34 by the inferior clear zone 222 at light guide sheet 3 bodies 30, form arc plane of refraction 341 by this, make the light that passes through to produce refraction and gathering, 22 press sections, button top layer, 220 higher brightness corresponding to this top, place are provided, in addition, by the radius of curvature size of adjusting deep-slotted chip breaker 34, change the curvature of arc plane of refraction 341, also can change the position of concentrating brightness.
Consult Fig. 9, Figure 10, be second preferred embodiment of the present utility model, be that with the aforementioned first preferred embodiment difference light guide sheet concentrates the refraction structure of brightness.In second preferred embodiment, light guide sheet 3 ' body 30 ' bottom surface 32 ' has been recessed to form a plurality of depressions 35, the deep-slotted chip breaker 34 that replaces first preferred embodiment with these depressions 35, the press section 220 that makes keyboard top layer 22 is that the position is above depression 35, each depression 35 has one and is the curved internal face of depression, and arc plane of refraction 351 is this curved internal face that caves in, the protruding lateral areas 342 ' of indication be for arc plane of refraction 351 convex shape a side towards the zone, the recessed lateral areas 343 ' of indication be similarly arc plane of refraction 351 be recess a side towards the zone.
Cooperate and consult Fig. 8, in first preferred embodiment, light by arc plane of refraction 341 only reflects on X-Y plane, and in second preferred embodiment, since arc plane of refraction 351 for the internal face curvature distribution of depression 35 at three dimensions, make light by arc plane of refraction 351 except on X-Y plane, reflecting, also produce the refraction of Z-direction, and accumulate in a place of recessed lateral areas 343 ' equally, thereby the brightness that can improve light guide sheet 3 ' body 30 ' inferior clear zone 222 local locations, and then provide 22 on button top layer in the enough brightness in the press section 220 in inferior clear zone 222.
And in second preferred embodiment, better person, when light guide sheet 3 ' is arranged on the circuit board 211, its depression 35 positions are corresponding to the portion that presses 213 on the circuit board 211 (the metal dome shape triggers reed), promptly press portion 213 and be the position in depression 35, when the material of the portion of pressing 213 had preferable reflecting effect, the light that produces refraction again by the reflection of the portion of pressing 213 up, more can make light directly towards 220 irradiations of the press section on keyboard top layer 22, have more the effect that improves its brightness.
Consult Figure 11, Figure 12, be the 3rd preferred embodiment of the present utility model, in the 3rd preferred embodiment, light guide sheet 3 " comprise a body 30 ", a plurality of bodies 30 that are arranged at " deep-slotted chip breaker 34 ' and a plurality of depression 35 ' that is communicated with deep-slotted chip breaker 34 ' below respectively; each deep-slotted chip breaker 34 ' runs through body 30 " end face 31 " and have one first arc plane of refraction 341 '; each depression 35 ' is by body 30 " bottom surface 32 " be recessed to form and be communicated with deep-slotted chip breaker 34 ' and have one second arc plane of refraction 351 '; the structure of deep-slotted chip breaker 34 ' can be identical with first preferred embodiment, and the structure of depression 35 ' can be identical with second preferred embodiment.In other words, in the 3rd preferred embodiment, be the arc plane of refraction 341 that merges first preferred embodiment and the arc plane of refraction 351 of second preferred embodiment, wherein, the first arc plane of refraction 341 ' can make light produce the refraction effect on the X-Y plane and concentrate, the second arc plane of refraction 351 ' then can make light be created in the refraction in the three dimensions and concentrate equally, therefore, can have simultaneously as first preferred embodiment and as the effect of second preferred embodiment, improve light guide sheet 3 " brightness of local location, and then provide 22 on button top layer in the enough brightness in the press section 220 in inferior clear zone 222.
Certainly, the refraction of depression 35 ' part cooperates the portion that presses 213 reflections on the circuit board 211 as described above again, equally more can make light directly towards 220 irradiations of the press section on keyboard top layer 22, has more the effect that improves its brightness.
What remark additionally is, the light guide plate 3,3 ', 3 of the foregoing description " can be the film (0.1mm-0.3mm) or the injection molding light-focusing type light guide plate of extrusion molding; if extrusion molding; then deep-slotted chip breaker 34,34 ' and depression 35,35 ' can be the mode moulding of etching, cutting or punching press; if injection moulding, then deep-slotted chip breaker 34,34 ' and form in the lump when depression 35,35 ' injection moldable.
The arc of indication can be the formed arc of curve, but also can be that most section straight lines or plane connect and be haply arc.
In sum, the utility model is by in light guide sheet 3,3 ', 3 " by be provided with deep-slotted chip breaker 34, depression 35,35 ' or both and the mode of depositing form arc plane of refraction 341,351,341 ', 351 '; concentrate light guide sheet 3,3 ', 3 by this " light in inferior clear zone 222, really can solve 22 on button top layer in the not enough problem of the press section in inferior clear zone 222 220 brightness, in addition, the position that brightness is concentrated also can change to some extent by setting arc plane of refraction 341,351,341 ', 351 ' curvature, so can reach the purpose of this utility model really.
No matter and be that the deep-slotted chip breaker 34 of first preferred embodiment, the depression 35 of second preferred embodiment or the deep-slotted chip breaker 34 ' of the 3rd preferred embodiment merge depression 35 ', when its depth penetration body 30,30 ', 30 " end face 31,31 ', 31 " with bottom surface 32,32 ', 32 " time; because arc plane of refraction 341,351,341 ', 351 ' is to be distributed in whole body 30,30 ', 30 " thickness, therefore, the scope that can gather light is bigger, so the light luminance that is gathered is also than higher.
The above person of thought, it only is preferred embodiment of the present utility model, when not limiting the scope that the utility model is implemented with this, promptly the simple equivalent of being done according to the utility model claims and utility model description generally changes and modifies, and all still belongs in the scope that the utility model patent contains.
Claims (18)
1. membrane keyboard comprises:
One circuit unit, described circuit unit comprises:
One circuit board; And
One luminescence component is fixedly arranged on described circuit board;
One light guide sheet, be arranged on the described circuit board and comprise a body, it is characterized in that, described light guide sheet comprises that also one is arranged at the deep-slotted chip breaker of described body, described body has an end face, a bottom surface towards described circuit board, a light incident sides towards described luminescence component, described deep-slotted chip breaker is between the end face and bottom surface of described body, and described deep-slotted chip breaker has one first arc plane of refraction, and the described first arc plane of refraction goes out a protruding lateral areas and a recessed lateral areas in described body defining; And
One keyboard top layer is arranged on the end face of described light guide sheet body and the upper surface on described keyboard top layer is provided with a plurality of press sections of Gong pushing, wherein contiguous described recessed lateral areas, a press section.
2. membrane keyboard as claimed in claim 1 is characterized in that, described deep-slotted chip breaker runs through the end face and the bottom surface of described body.
3. membrane keyboard as claimed in claim 1, it is characterized in that, described deep-slotted chip breaker runs through described body end face, the bottom surface of described body is recessed to form the depression of the described deep-slotted chip breaker of a connection, the local internal face of described depression is depression curved surface shape and defines the second arc plane of refraction of the described first arc plane of refraction of a connection, and the press section of contiguous described deep-slotted chip breaker is positioned at described depression top.
4. membrane keyboard as claimed in claim 3, it is characterized in that, described circuit unit comprises that also a plurality of metal dome shapes that are arranged on the described circuit board and correspond respectively to below, described these press sections trigger reeds, is positioned at described depression corresponding to the triggering reed of the described press section of contiguous described recessed lateral areas.
5. as each described membrane keyboard in the claim 1 to 4, it is characterized in that, when described luminescence component towards described light incident sides throw light, form a clear zone and the more described clear zone of a brightness is dark inferior clear zone at described body, described deep-slotted chip breaker to small part is positioned at the clear zone described time.
6. membrane keyboard as claimed in claim 5 is characterized in that, described luminescence component is a light-emitting diode.
7. membrane keyboard as claimed in claim 6 is characterized in that, described these press sections are literal, numeral, symbol or the pattern that is printed in described keyboard top layer upper surface.
8. membrane keyboard comprises:
One circuit unit, described circuit unit comprises:
One circuit board; And
One luminescence component is fixedly arranged on described circuit board;
One light guide sheet, be arranged on the described circuit board and comprise a body, it is characterized in that, described light guide sheet also comprises a depression, described body has an end face, a bottom surface towards described circuit board, a light incident sides towards described luminescence component, described depression is recessed to form by described body bottom surface and has one and is the curved arc plane of refraction of depression, and described arc plane of refraction goes out a protruding lateral areas and a recessed lateral areas in described body defining; And
One keyboard top layer is arranged on the end face of described light guide sheet body and the upper surface on described keyboard top layer is provided with a plurality of press sections of Gong pushing, and wherein a press section is positioned at described depression top.
9. membrane keyboard as claimed in claim 8 is characterized in that, described depression runs through described body end face.
10. membrane keyboard as claimed in claim 9, it is characterized in that, described circuit unit comprises that also a plurality of metal dome shapes that are arranged on the described circuit board and correspond respectively to below, described these press sections trigger reeds, is positioned at described depression corresponding to the triggering reed of the described press section that is positioned at described depression top.
11. as each described membrane keyboard in the claim 8 to 10, it is characterized in that, when described luminescence component towards described light incident sides throw light, form a clear zone and the more described clear zone of a brightness is dark inferior clear zone at described body, described depression to small part is positioned at the clear zone described time.
12. membrane keyboard as claimed in claim 11 is characterized in that, described luminescence component is a light-emitting diode.
13. membrane keyboard as claimed in claim 12 is characterized in that, described these press sections are literal, numeral, symbol or the pattern that is printed in described keyboard top layer upper surface.
14. a light guide sheet comprises:
One body has an end face, a bottom surface and a light incident sides;
It is characterized in that described light guide sheet also comprises:
One deep-slotted chip breaker, between the end face of described body and bottom surface and have one first arc plane of refraction, the described first arc plane of refraction goes out a protruding lateral areas and a recessed lateral areas in described body defining;
When light enters described body by described light incident sides, produce refraction by the light of described protruding lateral areas by the described first arc plane of refraction and concentrate on one place, described recessed lateral areas.
15. light guide sheet as claimed in claim 14 is characterized in that, described deep-slotted chip breaker runs through the end face and the bottom surface of described body.
16. light guide sheet as claimed in claim 14, it is characterized in that, described deep-slotted chip breaker runs through described body end face, the bottom surface of described body is recessed to form the depression of the described deep-slotted chip breaker of a connection, and the local internal face of described depression is depression curved surface shape and defines the second arc plane of refraction of the described first arc plane of refraction of a connection.
17. a light guide sheet comprises:
One body has an end face, a bottom surface and a light incident sides;
It is characterized in that described light guide sheet also comprises:
One depression, by described body bottom surface be recessed to form and have one be the depression curved arc plane of refraction, described arc plane of refraction goes out a protruding lateral areas and a recessed lateral areas in described body defining;
When light enters described body by described light incident sides, produce refraction by the light of described protruding lateral areas by described arc plane of refraction and concentrate on one place, described recessed lateral areas.
18. light guide sheet as claimed in claim 17 is characterized in that, described depression runs through described body end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201643277U CN201417697Y (en) | 2009-06-30 | 2009-06-30 | Light leading plate and thin-film keyboard comprising the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201643277U CN201417697Y (en) | 2009-06-30 | 2009-06-30 | Light leading plate and thin-film keyboard comprising the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201417697Y true CN201417697Y (en) | 2010-03-03 |
Family
ID=41794123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201643277U Expired - Lifetime CN201417697Y (en) | 2009-06-30 | 2009-06-30 | Light leading plate and thin-film keyboard comprising the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201417697Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102737879A (en) * | 2011-03-30 | 2012-10-17 | 阿尔卑斯电气株式会社 | Light guide sheet, sheet having contact spring and using the light guide sheet and switch device using the light guide sheet |
| CN104091713A (en) * | 2014-03-18 | 2014-10-08 | 苏州达方电子有限公司 | Backlight device and light-emitting keyboard |
-
2009
- 2009-06-30 CN CN2009201643277U patent/CN201417697Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102737879A (en) * | 2011-03-30 | 2012-10-17 | 阿尔卑斯电气株式会社 | Light guide sheet, sheet having contact spring and using the light guide sheet and switch device using the light guide sheet |
| CN102737879B (en) * | 2011-03-30 | 2015-02-11 | 阿尔卑斯电气株式会社 | Light guide sheet, sheet having contact spring and using the light guide sheet and switch device using the light guide sheet |
| 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 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100303 |
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| CX01 | Expiry of patent term |