CN104201032A - Light emitting keyboard - Google Patents
Light emitting keyboard Download PDFInfo
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- CN104201032A CN104201032A CN201410430860.9A CN201410430860A CN104201032A CN 104201032 A CN104201032 A CN 104201032A CN 201410430860 A CN201410430860 A CN 201410430860A CN 104201032 A CN104201032 A CN 104201032A
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- axis
- guide plate
- light guide
- led board
- axis led
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Abstract
The invention provides a light emitting keyboard. The light emitting keyboard comprises a plurality of light emitting keys and also comprises a light guide plate, an X axis LED (Light Emitting Diode) panel, a first Y axis LED panel and a second Y axis LED panel; the X axis LED panel is arranged at the position which is adjacent to a first X axis side of the light guide plate; the X axis LED panel comprises at least three X axis LED light emitting elements which can emit light towards the direction of a second X axis side of the light guide plate; a first dark area and a second dark area can be formed on the light guide plate; the first Y axis LED panel and the second Y axis LED panel are arranged at the positions which are adjacent to the X axis LED panel of the light guide plate; the first Y axis LED panel comprises a first Y axis LED light emitting element which can emit light towards the direction of the first dark area to illuminate the first dark area and the second Y axis LED panel comprises a second Y axis LED light emitting element which can emit light towards the direction of the second dark area to illuminate the second dark area. According to the light emitting keyboard, the dark areas which are formed on the light guide plate and not covered with the range of the light emitting angle of the LED light emitting elements arranged on the X axis are illuminated based on the LED light emitting elements of the Y axis so as to reduce the range of the dark areas formed on the light guide plate and accordingly the identification of the integral keyboard key in the dark environment is improved.
Description
Technical field
The present invention is relevant for a kind of keyboard, especially about a kind of illuminated keyboard in Y-axis with a plurality of luminous elements.
Background technology
Because computer has excellent information calculation process ability, in the modern times, become already the important tool in people's life or work, and keyboard is the upper indispensable accessory of computer use, the operation of keyboard is often subject to the impact of light intensity in environment for use, when keyboard is during in the weak dim environmental operations of light intensity, user possibly cannot see every distinguished symbol that button indicates on keyboard clearly, and allows user encounter difficulties to the operation of keyboard.
Therefore, then having the design of illuminated keyboard, refer to Fig. 1 a, is the main layer body schematic diagram of known illuminated keyboard.As shown in Figure 1a, known illuminated keyboard 2 from top to bottom comprises button group 20, metal bottom flaggy 25, light shield layer 23, light guide plate 24, reflector 26 and light source group 22.Wherein, in button group 20, there are a plurality of buttons 21, light guide plate 24 is located at the below of button group 20, for drawing medium as photoconduction, can allow light carry out therein total reflection conduction, and the diffusion dot pattern of mat coating on it destroys the total reflection of light at ad-hoc location, by ray guidance to light guide plate 24 fronts so that a plurality of buttons 21 of button group 20 are luminous, to see through the distinguished symbol that light highlights those buttons 21 in dim operating environment.
Refer to Fig. 1 b, LED (light-emitting diode by light source group 22, below all by LED, it is described) setting of luminous element 221,222 and light guide plate 24, make the distinguished symbol on keyboard 21 luminous, and allow user in the weak dim operating environment of light intensity, confirm function and the position of every button 21.Yet; in keyboard, often arranging of LED luminous element can be limited to various factors (for example; keyboard allows that the inner space of LED luminous element is set is limited; or be the low manufacturing cost of begging to surrender; the LED luminous element quantity of wishing required setting is fewer better; or the board area that LED luminous element is set is less better), thereby the LED luminous element of a greater number cannot be at random closely set in keyboard, make must separate and have certain distance between LED luminous element adjacent in keyboard.
Known illuminated keyboard a plurality of LED luminous element spread configurations on the circuit board of strip, and towards being approximately perpendicular to circuit board long axis direction emission of light.Because general LED luminous element rising angle is all less than 180 degree, therefore when adjacent LED luminous element 221,222 both each intervals, will in light guide plate 24, produce weak light region 242 (, the region of not contained by the fan-shaped rising angle scope in any one LED luminous element the place ahead, claims again dark space).In keyboard as shown in Figure 1 b, compared with the button printing nonopaque distinguished symbol " Ctrl " in intense light irradiation region 241, be positioned at the fan-shaped rising angle scope of at least one LED luminous element, therefore distinguished symbol " Ctrl " can be luminous with higher brightness.But the button printing nonopaque distinguished symbol " Alt " in weak light region 242 is not contained by the rising angle scope of any one LED luminous element, therefore the light in light guide plate 24 need, through compared with long-distance transmissions or compared with after multiple reflections, just can arrive at distinguished symbol " Alt " and locate; Therefore the luminosity of distinguished symbol " Alt " relatively will be faint many.So will have influence on keyboard in the identity of dim environment, allow user experience in integral keyboard, the luminosity of the recognition by pressing keys symbol of zones of different is inconsistent.
Therefore how using under the prerequisite of lesser amt LED luminous element, eliminate the weak light region in illuminated keyboard, to promote the uniformity of the Integral luminous effect of keyboard, then for present industry is desired most ardently the technology subject under discussion that challenge overcomes.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of illuminated keyboard in Y-axis with a plurality of luminous elements.
A kind of illuminated keyboard of the present invention, has a plurality of luminous buttons, and this illuminated keyboard comprises:
Light guide plate, at least comprise two relative the first X-axis limit and the second X-axis limits, and two relative the first Y-axis limit and the second Y-axis limits, in a rectangular shape to define this light guide plate, this light guide plate is located at the below of the plurality of luminous button, for conducting light so that the plurality of luminous button is luminous;
X-axis LED board, be located at the position on the first X-axis limit of contiguous this light guide plate, and extend along this first X-axis limit, this X-axis LED board has at least three can be respectively towards the luminous X-axis LED luminous element of this light guide plate the second X-axis edge direction, and the zone definitions that this light guide plate does not contain in these at least three X-axis LED luminous element rising angle scopes becomes the first dark space and the second dark space;
The first Y-axis LED board, is located at the position of the X-axis LED board of contiguous this light guide plate, and this first Y-axis LED board has can be towards the first luminous Y-axis LED luminous element of this light guide plate first dark space direction, in order to illuminate this first dark space; And
The second Y-axis LED board, is located at the position of the X-axis LED board of contiguous this light guide plate, and this second Y-axis LED board has can be towards the second luminous Y-axis LED luminous element of this light guide plate second dark space direction, in order to illuminate this second dark space.
As preferred scheme, this X-axis LED board, this first Y-axis LED board and this second Y-axis LED board divide and are arranged or in conjunction with being set to single structure body.
As preferred scheme, this X-axis LED board, this first Y-axis LED board become the shape of " F shape ", " U-shaped " or " TT shape " to arrange with this second Y-axis LED board.
As preferred scheme, long limit or minor face that this first X-axis limit and this second X-axis limit are this light guide plate; This first Y-axis limit and this second Y-axis limit are different from long limit or the minor face on this first X-axis limit and this second X-axis limit for this light guide plate.
As preferred scheme, this first Y-axis LED board and this second Y-axis LED board are located at the position between this first X-axis limit and this X-axis LED board in this light guide plate.
As preferred scheme, this first Y-axis LED board and this second Y-axis LED board are located at the position between this second X-axis limit and this X-axis LED board in this light guide plate.
As preferred scheme, this first Y-axis LED luminous element is luminous towards this light guide plate second Y-axis edge direction, and this second Y-axis LED luminous element is luminous towards this light guide plate first Y-axis edge direction.
As preferred scheme, this first Y-axis LED luminous element and the second Y-axis LED luminous element are luminous towards this light guide plate first Y-axis limit or the second Y-axis edge direction.
As preferred scheme, the rising angle scope of this first Y-axis LED luminous element is first fan-shaped, and this first fan-shapedly has the first center line, and this first center line and this X-axis LED board center line form the first angle.
As preferred scheme, the rising angle scope of this second Y-axis LED luminous element is second fan-shaped, and this second fan-shapedly has the second center line, and this second center line and this X-axis LED board center line form the second angle.
As preferred scheme, this first angle is identical with this second angle.
Compared with prior art, illuminated keyboard utilization of the present invention is arranged at the LED luminous element of Y-axis, to being arranged at the dark space that the LED luminous element rising angle scope of X-axis contains in light guide plate, do not provide illumination, use the scope that reduces dark space in light guide plate, and promote the identity of keyboard integral body in dim environment.Therefore the LED luminous element quantity of illuminated keyboard X-axis of the present invention setting can significantly reduce, to reduce the manufacturing cost of illuminated keyboard.
Accompanying drawing explanation
Fig. 1 a is the explosive view of the main layer of known illuminated keyboard body.
Fig. 1 b is the schematic diagram in the weak light region in known illuminated keyboard.
Fig. 2 to Fig. 5 is the schematic diagram of contiguous the first X-axis limit of illuminated keyboard X-axis LED board of the present invention four kinds of embodiment while arranging;
Fig. 6 is the schematic diagram of the first Y-axis LED luminous element and the second Y-axis LED luminous element relative luminous in the another embodiment of illuminated keyboard of the present invention;
Fig. 7 is the embodiment schematic diagram that the X-axis LED board of illuminated keyboard of the present invention is arranged at light guide plate minor face;
Fig. 8 to Figure 11 four kinds of embodiment schematic diagrames during with respect to X-axis LED board center line Q deflection certain angle that are illuminated keyboard of the present invention in the center line P of the sector region of the first Y-axis LED luminous element and the second Y-axis LED luminous element bright dipping;
Figure 12, Figure 13 are illuminated keyboard of the present invention in the center line P of the first Y-axis LED luminous element and the sector region of the second Y-axis LED luminous element bright dipping the first Y-axis LED luminous element and opposing luminous schematic diagram relative with the second Y-axis LED luminous element during with respect to X-axis LED board center line Q deflection certain angle;
Figure 14 is the embodiment schematic diagram that the X-axis LED board of illuminated keyboard of the present invention is arranged at light guide plate minor face.
[symbol description]
11 light guide plate
111 first X-axis limits
112 second X-axis limits
113 first Y-axis limits
114 second Y-axis limits
115 first dark spaces
116 second dark spaces
12 X-axis LED boards
121,122,123 X-axis LED luminous elements
13 first Y-axis LED plates
131 first Y-axis LED luminous elements
14 second Y-axis LED boards
141 second Y-axis LED luminous elements
21 buttons
22 light source groups
221,222 LED luminous elements
23 light shield layers
24 light guide plate
25 metal bottom flaggies
26 reflectors
241 compared with intense light irradiation region
242 weak light regions
Embodiment
For making that object of the present invention, structure, feature and function thereof are had to further understanding, hereby coordinate embodiment to be described in detail as follows.
Following content will be arranged in pairs or groups graphic, by particular specific embodiment, technology contents of the present invention will be described, those skilled in the art can understand other advantages of the present invention and effect easily by content disclosed in the present specification.The present invention also can be implemented or be applied by other different specific embodiments.Every details in this specification also can, based on different viewpoints and application, not deviating under spirit of the present invention, be carried out various modifications and change.Especially, in graphic, the proportionate relationship of each element and relative position are only had an exemplary use, not represent actual state of the invention process.
In order to solve the rising angle problem limited and derivative weak light region (claiming dark space) in light guide plate of LED luminous element in illuminated keyboard, the invention provides a kind of illuminated keyboard, inside has can be towards the luminous LED luminous element in above-mentioned weak light region, in order to reduce the scope in light guide plate weak light region.Shown in Fig. 2 to Figure 14 of the present invention, the illuminated keyboard in various embodiments of the present invention, comprises light guide plate 11, X-axis LED board 12, the first Y-axis LED board 13 and the second Y-axis LED board 14.
Light guide plate 11 at least comprises two relative the first X-axis limit 111 and the second X-axis limits 112, and two relative the first Y-axis limit 113 and the second Y-axis limits 114, and nationality is defined and formed the light guide plate with rectangular shape by this four edges.The first X-axis limit 111 and the second X-axis limit 112 can be long limit (as Fig. 2 to Fig. 6 and as Fig. 8 to Figure 13) or the minor face (as Fig. 7 and Figure 14) of light guide plate 11 rectangular shapes, correspondingly, the first Y-axis limit 113 and the second Y-axis limit 114 can be long limit or the minor face that is different from the first X-axis limit 111 and the second X-axis limit 112 in light guide plate 11 rectangular shapes.
X-axis LED board 12 is located at the position on the first X-axis limit 111 of contiguous light guide plate 11, and extends along the first X-axis limit 111.X-axis LED board 12 has at least three can be respectively towards the luminous X-axis LED luminous element 121,122,123 of light guide plate 11 second X-axis limit 112 directions.Because the rising angle that LED luminous element can provide is limited, and in light guide plate, between two LED luminous elements, the region of not contained by the fan-shaped rising angle scope of arbitrary LED luminous element can form dark space.Below, the zone definitions not contained by the fan-shaped rising angle scope of any X-axis LED luminous element 121,122,123 in light guide plate 11 is become to the first dark space 115 and the second dark space 116.
The first Y-axis LED board 13 extends from this X-axis LED board 12, and the position of contiguous X-axis LED luminous element 121; The first Y-axis LED board 13 has the first Y-axis LED luminous element 131, the first Y-axis LED luminous element 131 can be luminous towards light guide plate 11 first dark space 115 directions, in order to illuminate the first dark space 115, use minimizing and even eliminate the scope of the first dark space 115, make the button above light guide plate 11 first dark spaces 115 can receive enough luminous energy, send enough brightness, for people, see and find key light emitting.
The second Y-axis LED board 14 extends from this X-axis LED board 12, and the position of contiguous X-axis LED luminous element 122; The second Y-axis LED board 14 has the second Y-axis LED luminous element 141, the second Y-axis LED luminous element 141 can be luminous towards light guide plate 11 second dark space 116 directions, in order to illuminate the second dark space 116, use minimizing and even eliminate the scope of the second dark space 116, make the button above light guide plate 11 second dark spaces 116 can receive enough luminous energy, send enough brightness, for people, see and find key light emitting.
In the present invention, the light emission direction of the first Y-axis LED luminous element 131 and the second Y-axis LED luminous element 141, can adjust according to the position of the first dark space 115 and the second dark space 116 respectively, to improve the effect that illuminates the first dark space 115 and the second dark space 116.Illustrate as follows, as Fig. 2 to Fig. 5, (wherein Fig. 4, Fig. 5 compare with Fig. 2, Fig. 3, only changed the label on the first X-axis limit and the second X-axis limit, to show in actual applications, the first X-axis limit can be the top edge of light guide plate or one of them of lower limb, and the second X-axis limit is its opposite edges.Similarly, Figure 10,11 compares with Fig. 8, Fig. 9, and difference is also so, therefore repeat no more), the first Y-axis LED luminous element 131 and the second Y-axis LED luminous element 141 are all luminous towards the direction on light guide plate 11 second Y-axis limits 114.In practical application, also can, according to the position of the first dark space 115 and the second dark space 116, select to make the first Y-axis LED luminous element 131 and the second Y-axis LED luminous element 141 luminous towards the direction on light guide plate 11 first Y-axis limits 113, and person shown in Ying Yitu not be limited.In addition, in embodiment as shown in Figure 6, the first Y-axis LED luminous element 131 is luminous towards light guide plate 11 second Y-axis limit 114 directions, and the second Y-axis LED luminous element 141 is luminous towards light guide plate 11 first Y-axis limit 113 directions.
As shown in Fig. 8 to Figure 14, the center line P of the sector region of the first Y-axis LED luminous element 131 and the second Y-axis LED luminous element 141 bright dippings, has an angle theta that is greater than zero with X-axis LED board 12 center line Q respectively.That is the center line P of the sector region of the first Y-axis LED luminous element 131 bright dippings, from Fig. 2 embodiment, be parallel to X-axis LED board 12 center line Q directions, towards the angle of the direction rotation θ of the first dark space 115, the sector region of the first Y-axis LED luminous element 131 bright dippings like this can more completely cover the first dark space 115 so that illumination to be provided.Similarly, the center line P of the sector region of the second Y-axis LED luminous element 141 bright dippings, is to be parallel to X-axis LED board 12 center line Q directions from Fig. 2 embodiment, towards the angle of the direction rotation θ of the second dark space 116.In the present embodiment, preferably, the center line P of the first Y-axis LED luminous element 131 and the sector region of the second Y-axis LED luminous element 141 bright dippings is identical with respect to two angles of X-axis LED board center line Q deflection, but not as limit, in practical application, two angles that the first Y-axis LED luminous element 131 is corresponding from the second Y-axis LED luminous element 141 difference also can be different.
It should be noted that in embodiments of the invention, X-axis LED board 12, the first Y-axis LED board 13 and the second Y-axis LED board 14 can divide and be arranged, or based on being convenient to installing, this triplicity are set to single circuit panel structure.
In addition, for adapting to allowing of keyboard, space is set, X-axis LED board 12, the first Y-axis LED board 13 and the second Y-axis LED board 14 integral body can be arranged the shape of formation " essence F shape " (referring to shown in Fig. 2 to Fig. 5, Fig. 7 to Figure 11 and Figure 14), " essence U-shaped " (referring to shown in Fig. 6 and Figure 12) or " essence TT shape " (shown in Figure 13), and it is mainly that light emission direction different with respect to the position of X-axis LED board 12 by the first Y-axis LED board 13 and the second Y-axis LED board 14 and that be equipped with the first Y-axis LED board 13 and the second Y-axis LED board 14 forms relatively or contrarily.As shown in Figure 2, the first Y-axis LED board 13 and the second Y-axis LED board 14 are located at the position on 12, the first X-axis limit 111 and X-axis LED board in light guide plate 11, but not as limit, the first Y-axis LED board 13 and the second Y-axis LED board 14 also can adapt to the space that arranges that keyboard allows, be located at the position between the second X-axis limit 112 and X-axis LED board 12 in light guide plate 11, as shown in Fig. 3, Fig. 9, make the layout of whole illuminated keyboard comparatively flexible.
In sum, illuminated keyboard utilization of the present invention is arranged at the LED luminous element of Y-axis, to being arranged at the dark space that the LED luminous element rising angle scope of X-axis contains in light guide plate, do not provide illumination, use the scope that reduces dark space in light guide plate, and promote the identity of keyboard integral body in dim environment.Therefore the LED luminous element quantity of illuminated keyboard X-axis of the present invention setting can significantly reduce, to reduce the manufacturing cost of illuminated keyboard.
The present invention is described by above-mentioned related embodiment, yet above-described embodiment is only for implementing example of the present invention.Must be pointed out that, the embodiment having disclosed does not limit the scope of the invention.On the contrary, the change done without departing from the spirit and scope of the present invention and retouching, all belong to scope of patent protection of the present invention.
Claims (11)
1. an illuminated keyboard, has a plurality of luminous buttons, it is characterized in that this illuminated keyboard comprises:
Light guide plate, at least comprise two relative the first X-axis limit and the second X-axis limits, and two relative the first Y-axis limit and the second Y-axis limits, in a rectangular shape to define this light guide plate, this light guide plate is located at the below of the plurality of luminous button, for conducting light so that the plurality of luminous button is luminous;
X-axis LED board, be located at the position on the first X-axis limit of contiguous this light guide plate, and extend along this first X-axis limit, this X-axis LED board has at least three can be respectively towards the luminous X-axis LED luminous element of this light guide plate the second X-axis edge direction, and the zone definitions that this light guide plate does not contain in these at least three X-axis LED luminous element rising angle scopes becomes the first dark space and the second dark space;
The first Y-axis LED board, is located at the position of the X-axis LED board of contiguous this light guide plate, and this first Y-axis LED board has can be towards the first luminous Y-axis LED luminous element of this light guide plate first dark space direction, in order to illuminate this first dark space; And
The second Y-axis LED board, is located at the position of the X-axis LED board of contiguous this light guide plate, and this second Y-axis LED board has can be towards the second luminous Y-axis LED luminous element of this light guide plate second dark space direction, in order to illuminate this second dark space.
2. illuminated keyboard as claimed in claim 1, is characterized in that this X-axis LED board, this first Y-axis LED board and this second Y-axis LED board divide to be arranged or in conjunction with being set to single structure body.
3. illuminated keyboard as claimed in claim 1, is characterized in that this X-axis LED board, this first Y-axis LED board become the shape of " F shape ", " U-shaped " or " TT shape " to arrange with this second Y-axis LED board.
4. illuminated keyboard as claimed in claim 1, is characterized in that long limit or minor face that this first X-axis limit and this second X-axis limit are this light guide plate; This first Y-axis limit and this second Y-axis limit are different from long limit or the minor face on this first X-axis limit and this second X-axis limit for this light guide plate.
5. illuminated keyboard as claimed in claim 1, is characterized in that this first Y-axis LED board and this second Y-axis LED board be located at the position between this first X-axis limit and this X-axis LED board in this light guide plate.
6. illuminated keyboard as claimed in claim 1, is characterized in that this first Y-axis LED board and this second Y-axis LED board be located at the position between this second X-axis limit and this X-axis LED board in this light guide plate.
7. illuminated keyboard as claimed in claim 1, it is characterized in that this first Y-axis LED luminous element is luminous towards this light guide plate second Y-axis edge direction, and this second Y-axis LED luminous element is luminous towards this light guide plate first Y-axis edge direction.
8. illuminated keyboard as claimed in claim 1, is characterized in that this first Y-axis LED luminous element and the second Y-axis LED luminous element are luminous towards this light guide plate first Y-axis limit or the second Y-axis edge direction.
9. illuminated keyboard as claimed in claim 1, the rising angle scope that it is characterized in that this first Y-axis LED luminous element is first fan-shaped, and this first fan-shapedly has the first center line, and this first center line and this X-axis LED board center line form the first angle.
10. illuminated keyboard as claimed in claim 9, the rising angle scope that it is characterized in that this second Y-axis LED luminous element is second fan-shaped, and this second fan-shapedly has the second center line, and this second center line and this X-axis LED board center line form the second angle.
11. illuminated keyboards as claimed in claim 10, is characterized in that this first angle is identical with this second angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410430860.9A CN104201032B (en) | 2014-08-28 | 2014-08-28 | Illuminated keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410430860.9A CN104201032B (en) | 2014-08-28 | 2014-08-28 | Illuminated keyboard |
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| Publication Number | Publication Date |
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| CN104201032A true CN104201032A (en) | 2014-12-10 |
| CN104201032B CN104201032B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410430860.9A Active CN104201032B (en) | 2014-08-28 | 2014-08-28 | Illuminated keyboard |
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| Country | Link |
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| CN (1) | CN104201032B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430975A (en) * | 2007-11-08 | 2009-05-13 | 鸿富锦精密工业（深圳）有限公司 | Illuminant keyboard |
| TW201005584A (en) * | 2008-07-16 | 2010-02-01 | Zippy Tech Corp | Thin-type illuminating keyboard architecture |
| CN201985003U (en) * | 2011-01-29 | 2011-09-21 | 苏州达方电子有限公司 | Key and keyboard |
| CN202042405U (en) * | 2010-11-26 | 2011-11-16 | 苏州达方电子有限公司 | Light guide module and light emitting keyboard applying same |
| US20120287676A1 (en) * | 2011-05-11 | 2012-11-15 | Ko-Ju Chen | Light guide plate structure and method of fabricating the same |
| TW201426802A (en) * | 2012-12-19 | 2014-07-01 | Primax Electronics Ltd | Illuminating keyboard |
-
2014
- 2014-08-28 CN CN201410430860.9A patent/CN104201032B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430975A (en) * | 2007-11-08 | 2009-05-13 | 鸿富锦精密工业（深圳）有限公司 | Illuminant keyboard |
| TW201005584A (en) * | 2008-07-16 | 2010-02-01 | Zippy Tech Corp | Thin-type illuminating keyboard architecture |
| CN202042405U (en) * | 2010-11-26 | 2011-11-16 | 苏州达方电子有限公司 | Light guide module and light emitting keyboard applying same |
| CN201985003U (en) * | 2011-01-29 | 2011-09-21 | 苏州达方电子有限公司 | Key and keyboard |
| US20120287676A1 (en) * | 2011-05-11 | 2012-11-15 | Ko-Ju Chen | Light guide plate structure and method of fabricating the same |
| TW201426802A (en) * | 2012-12-19 | 2014-07-01 | Primax Electronics Ltd | Illuminating keyboard |
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|---|---|
| CN104201032B (en) | 2016-06-08 |
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