CN204927143U - Keyboard backlight unit's light -directing structure - Google Patents
Keyboard backlight unit's light -directing structure Download PDFInfo
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- CN204927143U CN204927143U CN201520512073.9U CN201520512073U CN204927143U CN 204927143 U CN204927143 U CN 204927143U CN 201520512073 U CN201520512073 U CN 201520512073U CN 204927143 U CN204927143 U CN 204927143U
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- Prior art keywords
- light
- high index
- refraction
- scattering point
- ink
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Abstract
The utility model discloses a keyboard backlight unit's light -directing structure, this light -directing structure is at the range upon range of form reflector layer of device that is shaded, leaded light layer and light shield layer top, be equipped with a plurality of buttons, and be equipped with illuminator's circuit board in the reflector layer department of the device that is shaded, then be equipped with a plurality of light emitting component on the circuit board, can throw light to the device that is shaded, and be equipped with a plurality of high refractive index scattering point again on leaded light layer surface, for locating lieing in each button position below respectively, and each high refractive index scattering point is the high refractive index particle through adding predetermined proportion in the printing ink, formation is to the high refractive index efficiency of light between the leaded light layer, reach the mesh that improves the light refracting index of device of being shaded, also can add the transparent material who has the colour in each high refractive index scattering point, supply device in a poor light can produce different colour variable's light high refractive index effect.
Description
Technical field
The utility model relates to a kind of light guide structure of keyboard back light module, particularly relate to the light guide structure of the high-brightness light diffraction efficiency that can improve back lighting device, be provided with multiple high index of refraction scattering point on the optical waveguide layer surface of back lighting device, the high index of refraction particle adding predetermined ratio can be utilized in ink, to reach the object improving light refraction, increase the brightness of backlighting device for keypad.
Background technology
Along with the progress in electronics technology epoch, much work, general paperwork or image, pictures etc. all can carry out processing operation by computer, and computer is except carrying out various operation process, more can provide connecting diagram internet, to search, shopping, video signal or download electronic data, video-audio data etc., the application model of the various computer that carries out playing etc. also can be provided, and the peripheral equipment of indispensability during computation, as keyboard, mouse etc., perform various program for computer, carry out the necessary periphery instrument of various operation, in the basic outfit of therefore computer, except host computer and display screen, keyboard and mouse also become indispensable instrument, and the keyboard that current most computer is applied, all perform various control signal by the multiple buttons on keyboard, the electronic signal such as word or numeral inputs in host computer, the pattern of keyboard be also be embedded many buttons in common keyboard skeleton frame can for pressing, be equivalent to basic computor-keyboard pattern.
Therefore practitioner is the pattern improving current set keyboard, then at keyboard installing backlight module, with through backlight module by light source projects to each button periphery of keyboard, light is spilt by the gap of adjacent of multiple keyboard, reach the change application increasing keyboard, also keyboard is can be used for have light display, be easy to the effect distinguished, and at the backlight module that the keyboard having lighting function at present uses, refer to shown in Fig. 6, for the end view of known keyboard backlight mode, in current keyboard, for reflective surface A2 place adjacent bottom the light guiding surface A1 of backlight module A, be respectively equipped with multiple pip A11, after then the luminous element A3 throw light S of backlight module A inside enters light guiding surface A1, light S will refract to pip A11 by light guiding surface A1, and the refracted ray S1 making light S reflect via pip A11 reflects above light guiding surface A1, then project outside through after light guiding surface A1 by shading surface A4 for light S, but at light S by pip A11 towards reflex time above light guiding surface A1, part refracted ray S2, S3, S4 can be reflected by the end face of light guiding surface A1 again, cause towards the reflection ray S1 brightness deterioration of shading surface A4 projection, and part refracted ray S2, S3, S4 is inner at light guiding surface A1, so that light is absorbed by light guiding surface A1, also brightness decay can be produced, the problem of luminous energy loss, affect luminance shortage when reflection ray S1 projects towards shading surface A4, and light source is by the pip A11 reflex time upward bottom light guiding surface A1, because of reflex circuit path length, light easily towards periphery scattering or absorb by light guiding surface A1 and decay, reflection ray S1 is not easily concentrated, the brightness of light S is also just not enough because of loss, the light display effect of backlight module A is caused to be deteriorated, the light Presentation Function affecting keyboard is not good, needs to be improved in fact.
Therefore, how to solve the pip institute reflection ray of keyboard back light module, easily produce optical attenuation, the disappearance of luminance shortage and problem, and ray cast to enter the path that light guiding surface undertakies reflecting by pip longer, also cause light luminance to be absorbed by light guiding surface and the trouble decayed and puzzlement, be engaged in this journey dealer desire most ardently the place, direction of improvement.
Utility model content
Because above-mentioned problem and disappearance, inventor of the present utility model collects related data, via in many ways assessing and considering, and to engage in the many years of experience of the industry accumulation, via constantly test and amendment, beginning to design this kind above the optical waveguide layer of back lighting device, can arrange the ink refracting layer with high index of refraction particle, thus the light of light-emitting device is concentrated towards light shield layer projection, the utility model patent of the light guide structure of the keyboard back light module keeping the brightness of back lighting device not easily to decay.
Main purpose of the present utility model is that this light guide structure is the layered laminate reflector layer at back lighting device, above optical waveguide layer and light shield layer, be provided with multiple button, and the circuit board of light-emitting device is provided with at the reflector layer place of back lighting device, and circuit board is provided with multiple light-emitting component, light can be projected to back lighting device, and above the optical waveguide layer of back lighting device, be provided with multiple high index of refraction scattering point again, locate being positioned at below each key position respectively for each high index of refraction scattering point, as for the high index of refraction particle that each high index of refraction scattering point is by adding predetermined ratio in ink, form the high index of refraction effect to the light between optical waveguide layer, to reach the object of the light refractive index improving back lighting device.
Secondary objective of the present utility model is in the plurality of high index of refraction scattering point, also the coloured light-transmitting materials ink of tool (as yellow, red, blue or green or other colors etc.) can be added, the function such as refraction or scattering of each high index of refraction scattering point is can pass through for back lighting device, and produce the light high index of refraction effect of different colours change, and the reflecting brightness of different colours can be formed during supplied ink reflection ray.
Another object of the present utility model is that the plurality of high index of refraction scattering point system comprises the high index of refraction particle adding predetermined ratio in ink, ink, and multiple high index of refraction scattering point be molded over back lighting device by processing modes such as printing, evaporation, adhesion or embeddings optical waveguide layer above and to the below place being positioned at each button; And the high index of refraction particle of 0.1 ~ 50% ratio can be added in ink, then this high index of refraction particle can be oxide [as silicon dioxide (SiO
2), aluminium oxide (Al
2o
3) or titanium dioxide (TiO
2) etc.], nitride [as aluminium nitride (AlN) etc.] or diamond class etc. have the particle of the high index of refraction of light; Particle diameter as this high index of refraction particle can be the particle of 0.1 ~ 20 μm of size, and by adding high index of refraction particle in ink, increases the surface roughening pattern of each high index of refraction scattering point, and has higher light scattering effect.
Accompanying drawing explanation
Fig. 1 is three-dimensional exploded view of the present utility model;
Fig. 2 is side cutaway view of the present utility model;
Fig. 3 is the end view of the utility model preferred embodiment;
Fig. 4 is the end view of another embodiment of the utility model;
Fig. 5 is the end view of the utility model embodiment again;
Fig. 6 is the end view of known keyboard backlight mode.
[symbol description]
1, back lighting device
11, reflector
12, optical waveguide layer
13, light shield layer
14, button
2, light-emitting device
21, circuit board
22, light-emitting component
3, high index of refraction scattering point
31, ink
32, high index of refraction particle
A, backlight module
A1, light guiding surface
A11, pip
A2, reflective surface
A3, luminous element
A4, shading surface
S, light
S1, reflection ray
S2, refracted ray
S3, refracted ray
S4, refracted ray
Embodiment
For reaching above-mentioned purpose and effect, the method etc. of the technological means that the utility model adopts and structure thereof, enforcement, existing by reference to the accompanying drawings just preferred embodiment of the present utility model illustrate that its features and functions is as follows in detail, can understand completely.
Refer to shown in Fig. 1-3, it is respectively the end view of three-dimensional exploded view of the present utility model, side cutaway view, preferred embodiment, find out by knowing shown in figure, the light guide structure of keyboard back light module of the present utility model, comprise back lighting device 1, light-emitting device 2 and multiple high index of refraction scattering point 3, wherein:
This back lighting device 1 comprises reflector 11 in layered laminate, optical waveguide layer 12 and light shield layer 13, and above light shield layer 13, be provided with multiple button 14.
This light-emitting device 2 comprises the circuit board 21 with preinstalled circuit layout, and circuit board 21 is provided with multiple light-emitting component 22 (can be light-emittingdiode LED).
The plurality of high index of refraction scattering point 3 comprises ink 31 and is added into the high index of refraction particle 32 of the predetermined ratio in ink 31.
Above-mentioned each component is when assembling, utilize the reflector 11 of back lighting device 1 for the circuit board 21 of assembling light-emitting device 2, and on power circuit board 21 multiple light-emitting component 22 towards optical waveguide layer 12, light shield layer 13 place, again multiple high index of refraction scattering point 3 is set on optical waveguide layer 12 surface of adjacent light shield layer 13, the light of the light-emitting component 22 that reflector 11 can be reflected, reflect toward light shield layer 13 place through multiple high index of refraction scattering point 3, improve the brightness of light refraction thus, the effect of heat radiation, with through back lighting device 1, light-emitting device 2 and multiple high index of refraction scattering points 3 etc. form the light guide structure of keyboard back light module of the present utility model.
And above-mentioned multiple high index of refraction scattering point 3 comprises the high index of refraction particle 32 adding predetermined ratio in ink 31, ink 31, this ink 31 can be the transparent ink of tool translucent effect, can pass through the processing modes such as printing, evaporation, adhesion or embedding, multiple high index of refraction scattering point 3 is combined optical waveguide layer 12 surface being positioned at back lighting device 1, and the high index of refraction particle 32 added in ink 31 (can be silicon dioxide SiO for oxide
2, aluminium oxide Al
2o
3or titanium dioxide TiO
2deng), the high index of refraction object such as nitride (can be aluminium nitride AlN etc.) or diamond class, and the high index of refraction particle 32 of the predetermined ratio of 0.1 ~ 50% can be added in ink 31, particle diameter as this high index of refraction particle 32 can be then the grain shape of the size form of 0.1 ~ 20 μm, the position that visual multiple high index of refraction scattering point 3 is positioned at optical waveguide layer 12 surface is different, add the high index of refraction particle 32 of different-grain diameter size, and then reach the effect producing different light rays refraction, and good light source scattering function can be had.
And above-mentioned multiple high index of refraction scattering point 3 is by processing modes such as printing or evaporations, give positioning combination above the optical waveguide layer 12 of back lighting device 1, then each light-emitting component 22 on the circuit board 21 of light-emitting device 2, towards the diverse location of back lighting device 1 (as central authorities, left, the positions such as the right side or bottom) projection source, light source is made to be projected to multiple high index of refraction scattering point 3 place via optical waveguide layer 12, the ink 31 of multiple high index of refraction scattering point 3 is utilized to have good anaclasis or reflection function, light source outwards can be reflected or reflect, unlikelyly to reflect in the opposite direction again, and the light source light of the overwhelming majority outwards can be reflected or reflexes to light shield layer 13 via multiple high index of refraction scattering point 3, the situation in optical waveguide layer 12 or reflector 11 is reflected back in the other direction to reduce light source, light source can be reduced because being reflected back optical waveguide layer 12, during reflector 11, light-source brightness is by optical waveguide layer 12, reflector 11 absorbed, and produce the phenomenon of light loss, light source reflection can be shortened simultaneously, the path forms of refraction, avoid light source because reflecting the bright disappearance of crossing impairment caused in the other direction, also reduce the light loss degree that light source projects process occurs, and again by adding high index of refraction particle 32 in multiple high index of refraction scattering point 3, there is the scattering light source effect of high index of refraction, increase the refraction of the light-source brightness of multiple high index of refraction scattering point 3, reflection performance, the light source that namely multiple high index of refraction scattering point 3 can be received is concentrated and is reflected towards the outside, reflection, scattering, the brightness of scattering light source can be increased, formation high brightness reflects, effect of scattering.
Refer to shown in Fig. 1-5, be respectively three-dimensional exploded view of the present utility model, side cutaway view, the end view of preferred embodiment, the end view of another embodiment, the end view of an embodiment again, find out by knowing shown in figure, the light guide structure of the utility model keyboard back light module, tool translucent effect can be added in the ink 31 of multiple high index of refraction scattering point 3, the coloured light-transmitting materials ink of tool, and the coloured light-transmitting materials ink of tool can be yellow, red, blue, the toner of green or other colors, can reflect so as to supplied ink 31, reflect or scatter the light effect with shades of colour, coordinate the high index of refraction particle 32 added in ink 31 again, the color light that has of reflection is reflected by multiple high index of refraction scattering point 3 outwardly, reflection or scattering etc., reach and improve light source refraction, the merit of the effects such as reflection or scattering, the position of the multiple buttons 14 assembled above the light shield layer 13 on back lighting device 1 can be coordinated, or the multiple buttons 14 in subregion have special applications function (as when being applied to computer game, multiple buttons 14 in subregion have manipulation moving direction, the effects such as jump or transmitting) etc., optical waveguide layer 12 below multiple buttons 14 in specific function region, surface can arrange multiple high index of refraction scattering points 3 of different colours, multiple buttons 14 thus in specific region, the effect of different colours light display can be produced, reach the deixis of different colours light, there is the region of the multiple buttons 14 being easy to identification and have special efficacy, the function of position.
Moreover, the utility model is provided with multiple high index of refraction scattering point 3 in optical waveguide layer 12 top of back lighting device 1, and bottom optical waveguide layer 12, be provided with multiple high index of refraction scattering point 3 again, multiple high index of refraction scattering point 3 can be combined respectively optical waveguide layer 12 top and lower surface that are positioned back lighting device 1, in asymmetric mode misaligned interval spread configuration, then the light-emitting component 22 of light-emitting device 2 by light source projects to optical waveguide layer 12 time, light source is projected to each high index of refraction scattering point 3 place upward, namely can pass through each high index of refraction scattering point 3 outwards to project, light-emitting component 22 part down projection source is projected to each high index of refraction scattering point 3 bottom optical waveguide layer 12, through each high index of refraction scattering point 3 being positioned at bottom, light source is reflected toward top again, again via the outwards scattering of each high index of refraction scattering point 3, the refraction of the light source of each high index of refraction scattering point 3 can be increased, the usefulness of reflection or scattering, and be projected to the light source being positioned at each high index of refraction scattering point 3 bottom optical waveguide layer 12, if not by upwards reflection person, after then can making light source projects to reflector 11, optical waveguide layer 12 and light shield layer 13 is upwards reflexed to again by reflector 11, being concentrated by light source to be projected to below multiple button 14 makes each button 14 bottom periphery have good light display effect.
Be with, the foregoing is only preferred embodiment of the present utility model, non-ly therefore limit to the scope of the claims of the present utility model, backlight module light guide structure of the present utility model, assemble light-emitting device 2 on the reflector 11 of back lighting device 1, and surface adjacent with light shield layer 13 above optical waveguide layer 12, combine location by processing mode and form multiple high index of refraction scattering point 3, the plurality of high index of refraction scattering point 3 adds the high index of refraction particle 32 of predetermined ratio in ink 31, thus the light that the light-emitting component 22 of light-emitting device 2 is projected to optical waveguide layer 12 by multiple high index of refraction scattering point 3 can be reached through, outwards reflect via multiple high index of refraction scattering point 3, the object of reflection or scattering, by the high index of refraction particle 32 added in multiple high index of refraction scattering point 3, there is good light scattering effect, reduce the phenomenon of light source back reflection, light source can be reduced absorbed by optical waveguide layer 12 because of back reflection, reduce the situation of light loss, and multiple high index of refraction scattering point 3 can be utilized to add the coloured ink 31 of tool, the effect of scattering different colours brightness can be carried out, therefore every structure reaching foregoing advantages, device all should be contained by the utility model, this kind of simple and easy modification and equivalent structure change, all should in like manner be contained in the scope of the claims of the present utility model.
Therefore, the utility model designs mainly for the light guide structure of backlight module, utilize the adjacent optical waveguide layer surface towards photosphere of back lighting device that multiple high index of refraction scattering point is set, the high index of refraction particle of predetermined ratio is added in ink by multiple high index of refraction scattering point, after the light source that the light-emitting component of light-emitting device can be projected optical waveguide layer inside reflexes to multiple high index of refraction scattering point, and then light source reflects towards light shield layer place by the high index of refraction particle that can be reached through multiple high index of refraction scattering point, reflection or scattering are main key protection point, the brightness effects of light source refraction scattering is improved by multiple high index of refraction scattering point, most light source is externally reflected or reflects, the path that light source is reversed projection again can be shortened, back lighting device is made to have the advantage reducing light loss, and the coloured ink of tool can be added at multiple high index of refraction scattering point, can for the specific location area of back lighting device, different colours light can be projected, to be easy to distinguish the object of looking special function keys.And, the foregoing is only preferred embodiment of the present utility model, non-ly therefore namely limit to the scope of the claims of the present utility model, therefore the simple and easy modification of doing of every utilization the utility model specification and accompanying drawing content and equivalent structure change, all should in like manner be contained in the scope of the claims of the present utility model.
Claims (8)
1. a light guide structure for keyboard back light module, comprises back lighting device, light-emitting device and multiple high index of refraction scattering point, wherein:
This back lighting device comprises the reflector layer of layered laminate, optical waveguide layer and light shield layer, and above light shield layer, be provided with multiple button;
This light-emitting device is positioned at the reflector layer place of back lighting device, and is provided with and is positioned reflector layer place and the circuit board with preinstalled circuit, and circuit board is provided with multiple light-emitting component; And
The plurality of high index of refraction scattering point be take shape in back lighting device optical waveguide layer above and to being positioned at each button lower position, comprise shaping be positioned optical waveguide layer surface ink, make an addition to the high index of refraction particle that predetermined ratio in ink has anaclasis effect.
2. the light guide structure of keyboard back light module as claimed in claim 1, wherein the ink of the plurality of high index of refraction scattering point is positioned above optical waveguide layer by the processing mode of printing, evaporation, adhesion or embedding is shaping.
3. the light guide structure of keyboard back light module as claimed in claim 1, the high index of refraction particle wherein added in this ink is oxide or nitride or diamond, increases high index of refraction scattering point thus to the refraction of light-source brightness, reflection or scattering.
4. the light guide structure of keyboard back light module as claimed in claim 3, wherein this oxide is silicon dioxide (SiO
2), aluminium oxide (Al
2o
3) or titanium dioxide (TiO
2); Nitride is then aluminium nitride (AlN).
5. the light guide structure of keyboard back light module as claimed in claim 3, wherein the particle diameter of this high index of refraction particle is 0.1 ~ 20 μm.
6. the light guide structure of keyboard back light module as claimed in claim 3, wherein this ink is the transparent ink of tool light transmitting property, and in ink, add the light-transmitting materials of predetermined color, and light-transmitting materials has yellow, redness, blueness or green color.
7. the light guide structure of keyboard back light module as claimed in claim 1, with the addition of the high index of refraction particle of 0.1 ~ 50% ratio in the ink of wherein the plurality of high index of refraction scattering point.
8. the light guide structure of keyboard back light module as claimed in claim 1, wherein the optical waveguide layer of this back lighting device be at top, to be respectively equipped with tool high index of refraction be that asymmetric formula is interlocked spaced multiple high index of refraction scattering point in bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520512073.9U CN204927143U (en) | 2015-07-15 | 2015-07-15 | Keyboard backlight unit's light -directing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520512073.9U CN204927143U (en) | 2015-07-15 | 2015-07-15 | Keyboard backlight unit's light -directing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204927143U true CN204927143U (en) | 2015-12-30 |
Family
ID=54976251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520512073.9U Expired - Fee Related CN204927143U (en) | 2015-07-15 | 2015-07-15 | Keyboard backlight unit's light -directing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204927143U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643807A (en) * | 2016-07-20 | 2018-01-30 | 欣永丰科技股份有限公司 | Keyboard backlight device of portable computer |
| CN108766818A (en) * | 2017-09-29 | 2018-11-06 | 苏州达方电子有限公司 | Back lighting device for illuminated keyboard |
| CN111722758A (en) * | 2019-03-20 | 2020-09-29 | 群光电能科技股份有限公司 | Light-emitting touch panel device |
-
2015
- 2015-07-15 CN CN201520512073.9U patent/CN204927143U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643807A (en) * | 2016-07-20 | 2018-01-30 | 欣永丰科技股份有限公司 | Keyboard backlight device of portable computer |
| CN108766818A (en) * | 2017-09-29 | 2018-11-06 | 苏州达方电子有限公司 | Back lighting device for illuminated keyboard |
| CN111722758A (en) * | 2019-03-20 | 2020-09-29 | 群光电能科技股份有限公司 | Light-emitting touch panel device |
| CN111722758B (en) * | 2019-03-20 | 2023-09-29 | 群光电能科技股份有限公司 | Luminous touch panel device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20190715 |