CN104979124A - Flexible circuit board having shielding effect and applied to keyboard backlight - Google Patents
Flexible circuit board having shielding effect and applied to keyboard backlight Download PDFInfo
- Publication number
- CN104979124A CN104979124A CN201410144260.6A CN201410144260A CN104979124A CN 104979124 A CN104979124 A CN 104979124A CN 201410144260 A CN201410144260 A CN 201410144260A CN 104979124 A CN104979124 A CN 104979124A
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- circuit board
- flexible circuit
- light
- guide plate
- light guide
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Abstract
The invention provides a flexible circuit board having a shielding effect and applied to keyboard backlight. A light guide plate of a backlight module is provided with a plurality of blow holes, and the surface of the flexible circuit board abutted against the surface of one side of the light guide plate is provided with a plurality of light-emitting diodes stretching into the blow holes respectively; the side, extending out of the light guide plate, of the flexible circuit board folds reversely to the direction of the light guide plate to form a bending portion, and then the flexible circuit board is abutted to the other surface of the light guide plate to form folding attachment to enable the plurality of light-emitting diodes to extend into the blow holes respectively, and thus the light-emitting diodes form up-and-down reverse arrangement and staggered arrangement with the light-emitting diodes on the other side surface of the flexible circuit board; an optical film layer formed on the surface of the flexible circuit board is utilized to shield the light rays emitted out of the blow holes of the light-emitting diodes or reflect the light rays back to the inner portion of the light guide plate to form a double-face shielding effect and reflection effect so as to improve elasticity of the light-emitting diodes in space design; and the width area of the flexible circuit board can be effectively reduced to enable the whole production cost to be lower.
Description
Technical field
The invention provides and be a kind ofly applied to the flexible circuit board that keyboard back light has screening effect, espespecially can flexible circuit board doubling be attached in light guide plate, its light-emitting diode just can be inserted in holes and form upper and lower Heterogeneous Permutation, and utilizes flexible circuit board optical film formed on the surface to have the effect of two-sided shading and reflection.
Background technology
The fast development of electronics technology and information industry now, make various electronic product all towards light, thin, short, little and powerful trend development, as computer, notebook computer, in the action net arrangement (MID), intelligent mobile phone, flat computer etc., become the electronic product that modern is indispensable in daily life or work, and be use the input equipment such as mouse, keyboard to link up mostly between user and electronic product, wherein the most conveniently do again the input operation of word, numeral or instruction with keyboard, and promote practical function.
Moreover, symbol on each button is clearly seen in order to human eye can be made under the environment of insufficient light, just there is dealer in keyboard, import light guide plate and light source technology, and develop the backlight keyboard of tool backlight module, the back side place that the light that backlight module is produced can project each keycap forms backlight effect, allow user can know the symbol seen on keycap, use with handled easily, and current backlight keyboard on the market includes key-press module and backlight module, wherein this backlight module is for having a light guide plate, and the luminescence unit of tool flexible circuit board and light-emitting diode is provided with in surface, light guide plate side, and luminescence unit is for make light guide plate uniformly light-emitting towards light guide plate throw light, locate again as being provided with the reflecting piece light reflection emitted by light guide plate lower surface can returned in light guide plate below light guide plate, and light guide plate upper surface is provided with the anti-dazzling screen corresponding to key-press module place, just the transmittance section light emitted by light guide plate can being passed anti-dazzling screen is incident on key-press module and forms backlight.
But, refer to shown in Fig. 8, for the part sectioned view of existing backlight module, wherein the light guide plate A1 of this backlight module A is on the surface for being provided with multiple holes A11 of misaligned interval arrangement, and be provided with reflecting piece A2 in light guide plate A1 lower surface, and reflecting piece A2 is provided with the multiple perforation A21 corresponding to holes A11 place on the surface, and flexible circuit board A3 is to being affixed on the another side surface place of reflecting piece A2 relative to light guide plate A1, and flexible circuit board A3 is provided with the multiple light-emitting diode A31 through being inserted into after perforation A21 in holes A11 on the surface, this kind of multiple light-emitting diode A31 is coupled to width area flexible circuit board A3 being formed and is staggered increasing on flexible circuit board A3, the design of overall configuration is more complicated and difficult, the inner confined space fully cannot be applied to cause other component of backlight keyboard all to need cooperation to be changed, cause the elasticity on cost and space matching just can be limited to, be be engaged in this journey dealer desire most ardently research improve key point.
Summary of the invention
Inventor is in view of the problem in above-mentioned existing keyboard back light module use and disappearance, be collect related data via in many ways assessing and considering, and utilize the research and development experience for many years engaging in the industry constantly to study and amendment, begin to design this kind and be applied to the flexible circuit board invention birth that keyboard back light has screening effect.
Main purpose of the present invention be backlight module institute tool light guide plate on for being provided with multiple holes, and the flexible circuit board supporting subsides in surface, light guide plate side has the multiple light-emitting diodes be inserted in holes on the surface, just flexible circuit board can be extended the side place of light guide plate for be formed with kink towards light guide plate reflexed, being formed after doubling attaches to the another side surface place being affixed on light guide plate makes multiple light-emitting diode be inserted in holes again, and form contrary up and down setting and Heterogeneous Permutation with multiple light-emitting diodes at flexible circuit board another side surface place, just flexible circuit board optical film formed on the surface can be utilized to be carried out covering or be reflected back the effect that light guide plate inside forms two-sided shading and reflection by the light of light-emitting diode injection to broken hole position, effectively to reduce the width area on flexible circuit board, and can configuration be simplified, promote the elasticity of light-emitting diode spatial design, increase the quantity of flexible circuit board being put light-emitting diode makes integral production cost more cheap simultaneously.
Secondary objective of the present invention is be that the light guide plate lower surface of this backlight module is for can be provided with at least one reflecting piece further, and in reflecting piece to be provided with on the surface corresponding to broken hole position can pass for light-emitting diode after be inserted into multiple perforation in holes, just reflecting piece can be utilized to return in light guide plate by the light reflection that light guide plate lower surface penetrates, and coordinate uniformity and the directivity of the light of the optical film adjustment light guide plate injection of flexible circuit board, make light guide plate Integral luminous more even.
Another object of the present invention be this backlight module light guide plate surface on at least one anti-dazzling screen can be provided with further, and in anti-dazzling screen to be also provided with on the surface corresponding to broken hole position can pass for light-emitting diode after be inserted into multiple transmittance sections in holes, and transmittance section is respectively perforation or transmission region, make the light of light guide plate be incident to after push-button unit place that key-press module has a light transmission passes by the transmittance section of anti-dazzling screen, the effect of good backlight keyboard luminescence can be reached.
Accompanying drawing explanation
Fig. 1 is the vertical view before doubling of the present invention.
Side cutaway view when Fig. 2 is doubling of the present invention.
Fig. 3 is the side cutaway view after doubling of the present invention.
Fig. 4 is the partial enlarged drawing of the present invention the 3rd figure.
Fig. 5 is the side cutaway view of present pre-ferred embodiments.
Fig. 6 is the part sectioned view of another preferred embodiment of the present invention.
Fig. 7 is the part sectioned view of the present invention's preferred embodiment again.
Fig. 8 is the part sectioned view of existing backlight module.
[symbol description]
1, backlight module
11, light guide plate
111, holes
12, flexible circuit board
120, optical film
121, light-emitting diode
122, electrical power source connection
1221, contact
123, kink
13, reflecting piece
131, bore a hole
14, anti-dazzling screen
141, transmittance section
2, key-press module
21, base plate
22, push-button unit
221, keycap
222, connect mechanism
23, film circuit board
24, flexible member
A, backlight module
A1, light guide plate
A11, holes
A2, reflecting piece
A21, perforation
A3, flexible circuit board
A31, light-emitting diode
Embodiment
For reaching above-mentioned purpose and effect, the technology used in the present invention means and structure thereof, just preferred embodiment of the present invention of hereby drawing illustrates that its structure is as follows with function in detail, in order to understand completely.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Fig. 5, be respectively the vertical view before doubling of the present invention, side cutaway view during doubling, side cutaway view after doubling, the partial enlarged drawing of Fig. 3 and the side cutaway view of preferred embodiment, find out by knowing in figure, the present invention is for including backlight module 1, this backlight module 1 is for having light guide plate 11 and flexible circuit board 12, and in light guide plate 11 on the surface middle position be provided with the equidistant or spaced multiple holes 111 of Unequal distance along short side direction, and for having multiple light-emitting diode 121 on flexible circuit board 12, and being coupled to flexible circuit board 12 by multiple light-emitting diode 121, to form at least one row on the surface identical, the straight line of different light emission direction or non-linear configuration, its flexible circuit board 12 is formed with an optical film 120 on the surface, and flexible circuit board 12 side place is provided with the electrical power source connection 122 of the multiple contact 1221 of tool.
Moreover, flexible circuit board 12 on the surface better being embodied as utilizes white ink, black ink is formed with the optical film 120 of tool shading and reflecting effect with printing or the mode of coating waste water according to predetermined ratio, but when practical application, also aluminium can be utilized on the surface at flexible circuit board 12, silver or other metal material are formed with the optical film 120 of tool shading and reflecting effect in the mode that vacuum coating or chemical vapor deposition are processed, also can change to other color ink according to practical application and form optical film 120 according to predetermined ratio modulation, and there is shading, reflection, the effects such as extinction, the simple and easy modification of such as using specification of the present invention and graphic content to do and equivalent structure change, all should in like manner be contained in the scope of the claims of the present invention.
When the present invention is in time assembling, first by multiple light-emitting diodes 121 of flexible circuit board 12 for being aligned with holes 111 place of light guide plate 11, and make flexible circuit board 12 to being affixed on surface, light guide plate 11 side, its light-emitting diode 121 just can be inserted in holes 111 corresponding in light guide plate 11, and all the other parts of flexible circuit board 12 are then extended position, light guide plate 11 long limit and are formed orthogonal, continue and flexible circuit board 12 side place is formed with kink 123 with folding lines (not marking in figure) towards light guide plate 11 direction reflexed close to middle section position, form doubling to the another side surface place being affixed on light guide plate 11 again to attach, and make multiple light-emitting diodes 121 of surface, flexible circuit board 12 side be inserted in holes 111 corresponding in light guide plate 11, and formed with multiple light-emitting diodes 121 at the another side surface place of flexible circuit board 12 and arrange and identical or not identical light emission direction Heterogeneous Permutation on the contrary up and down, flexible circuit board 12 doubling can be attached at light guide plate about 11 two side surface place under width and make multiple light-emitting diode 121 form upper and lower Heterogeneous Permutation not changing by this kind of flexible circuit board 12, effectively to reduce the width area on flexible circuit board 12, and can configuration be simplified, promote the elasticity in light-emitting diode 121 spatial design, increase the quantity of flexible circuit board 12 being put light-emitting diode 121 simultaneously, and then the configuration reaching flexible circuit board 12 is simple, effective saving width area makes overall production cost more cheap, with elasticity and the effectiveness reduced costs of spatial design.
But, for to be provided with key-press module 2 further on backlight module 1, and include base plate 21 in key-press module 2, multiple push-button unit 22, film circuit board 23 and at least one flexible member 24, and push-button unit 22 is for being arranged on base plate 21, and include a keycap 221 and be positioned at the connect mechanism 222 that can move up and down for keycap 221 between keycap 221 and base plate 21, and the better enforcement of connect mechanism 222 can be a scissor leg structure, just film circuit board 23 can be arranged at below or the top place of base plate 21, and flexible member 24 is arranged between film circuit board 23 and multiple push-button unit 22, when user finger presses in push-button unit 22 keycap 221 on the surface time, its keycap 221 just can press down flexible member 24 and touch on film circuit board 23, make the formation that contacts with each other of the contact of circuit electrically conduct, to produce the controller that the trigger signals corresponding to this push-button unit 22 character symbols be pressed exports backlight keyboard to, only this part is because key-press module 2 coordinates the structural design mode of backlight module 1 a lot, and the formation in this thin portion be not this case found main points, hereby do not remake and repeat.
The electrical power source connection 122 of flexible circuit board 12 of the present invention is for being electrically connected in the electric connector of backlight keyboard internal circuit blocks (not shown), to provide the electric power needed for multiple light-emitting diode 121, when light-emitting diode 121 is luminous, can project light towards light guide plate 11 makes light carry out transmitting uniform luminescence in light guide plate 11, re-shoot after push-button unit 22 place to key-press module 2 with light-transmissive passes, the effect of good backlight keyboard luminescence can be reached, light guide plate about 11 two side surface place is attached at this flexible circuit board 12 doubling, the light that the optical film 120 of flexible circuit board 12 can be utilized to be penetrated by light-emitting diode 121 to holes 111 outside as light shield layer carries out covering the effect forming two-sided shading, with the phenomenon effectively preventing holes 111 place from light leak occurring, also can utilize optical film 120, as reflector layer, the light reflection at holes 111 place is returned the effect that light guide plate 11 inside forms reflection, adjust uniformity and the directivity of the light that light guide plate 11 penetrates thus, and flexible circuit board 12 doubling to be attached in light guide plate 11 after multiple light-emitting diode 121 form upper and lower Heterogeneous Permutation, flexible circuit board 12 can be made to coordinate the thickness of light guide plate 11 entirety to reduce and more slimming, to meet the compact design requirement of product, have more the competitiveness of product.
Please arrange in pairs or groups and consult Fig. 1, Fig. 3, Fig. 6, shown in Fig. 7, be respectively the vertical view before doubling of the present invention, side cutaway view after doubling, the part sectioned view of another preferred embodiment and the part sectioned view of a preferred embodiment again, find out by knowing in figure, wherein between the light guide plate 11 of this backlight module 1 and flexible circuit board 12 for be provided with at least one reflecting piece 13 further, and be provided with the multiple perforation 131 corresponding to holes 111 place on the surface in reflecting piece 13, make multiple light-emitting diodes 121 of flexible circuit board 12 through being inserted in holes 111 corresponding in light guide plate 11 behind perforation 131 place, but when practical application, also can be provided with at light guide plate 11 lower surface the multiple reflecting piece 13 being positioned at flexible circuit board 12 2 side place, just reflecting piece 13 can be utilized not have a light transmission returns in light guide plate 11 by the light reflection emitted by light guide plate 11 lower surface, make light guide plate 11 Integral luminous more even.
In addition, above-mentioned light guide plate 11 is on the surface for be provided with at least one anti-dazzling screen 14 further, and be also provided with the multiple transmittance sections 141 corresponding to holes 111 place on the surface in anti-dazzling screen 14, but when practical application, also can be provided with at light guide plate 11 upper surface the multiple anti-dazzling screens 14 being positioned at flexible circuit board 12 2 side place, and transmittance section 141 can be respectively a perforation or transmission region, just can by multiple light-emitting diodes 121 of surface, flexible circuit board 12 side through being inserted in holes 111 corresponding in light guide plate 11 behind the place of transmittance section 141, and form upper and lower Heterogeneous Permutation with multiple light-emitting diodes 121 at the another side surface place of flexible circuit board 12, make the light of light guide plate 11 only can by the multiple transmittance sections 141 on anti-dazzling screen 14, re-shoot after push-button unit 22 place to key-press module 2 with light-transmissive passes, the effect of good backlight keyboard luminescence can be reached.
Above-mentioned detailed description be for one of the present invention preferably possible embodiments illustrate, only this embodiment be not used to limit claim of the present invention, under all other does not depart from disclosed skill spirit, the equalization change that completes is changed with modifying, and all should be contained in the scope of the claims that the present invention contains.
In sum, for really can reach its effect and object when the flexible circuit board of what the present invention was above-mentioned be applied to keyboard back light has screening effect uses, therefore the present invention is really the invention of a practicality excellence, and reality meets the application requirement of patent of invention.
Claims (9)
1. one kind is applied to the flexible circuit board that keyboard back light has screening effect, it is characterized in that including backlight module, this backlight module is for having light guide plate, and be provided with multiple holes in light guide plate, and surface, light guide plate side is to posting flexible circuit board, its flexible circuit board has at least one row on the surface and is inserted into multiple light-emitting diodes in holes, and flexible circuit board is formed with optical film, and the side of being extended light guide plate by flexible circuit board is formed with kink towards light guide plate reflexed, form doubling again attach to the another side surface place being affixed on light guide plate and make multiple light-emitting diode be inserted in holes, and form contrary up and down setting and Heterogeneous Permutation with multiple light-emitting diodes at flexible circuit board another side surface place.
2. be applied to the flexible circuit board that keyboard back light has screening effect as claimed in claim 1, it is characterized in that, in the light guide plate surface of this backlight module along short side direction for being provided with the equidistant or spaced multiple holes of Unequal distance.
3. be applied to the flexible circuit board that keyboard back light has screening effect as claimed in claim 1, it is characterized in that, multiple light-emitting diodes of this backlight module form at least one row's straight line or non-linear configuration on the surface for being coupled to flexible circuit board, and are provided with the electrical power source connection of the multiple contact of tool in flexible circuit board side place.
4. be applied to the flexible circuit board that keyboard back light has screening effect as claimed in claim 1, it is characterized in that, the flexible circuit board of this backlight module is on the surface for utilizing ink to be formed with optical film in the mode of printing or coating waste water.
5. be applied to the flexible circuit board that keyboard back light has screening effect as claimed in claim 4, it is characterized in that, the optical film of this flexible circuit board forms according to predetermined ratio modulation for utilizing white ink or black ink.
6. be applied to the flexible circuit board that keyboard back light has screening effect as claimed in claim 1, it is characterized in that, the flexible circuit board of this backlight module is on the surface for utilizing aluminium or silver to be formed with optical film in the mode of vacuum coating or chemical vapor deposition processing.
7. be applied to the flexible circuit board that keyboard back light has screening effect as claimed in claim 1, it is characterized in that, the light guide plate lower surface of this backlight module is be provided with at least one the light reflection that light guide plate lower surface penetrates is returned reflecting piece in light guide plate, and in reflecting piece be provided with on the surface pass for the light-emitting diode of flexible circuit board corresponding to broken hole position after be inserted into multiple perforation in the holes of light guide plate.
8. be applied to the flexible circuit board that keyboard back light has screening effect as claimed in claim 1, it is characterized in that, for being provided with at least one anti-dazzling screen in the light guide plate surface of this backlight module, and in anti-dazzling screen be provided with on the surface pass for the light-emitting diode of flexible circuit board corresponding to broken hole position after be inserted into multiple transmittance sections in the holes of light guide plate, and transmittance section is respectively perforation or transmission region.
9. be applied to the flexible circuit board that keyboard back light has screening effect as claimed in claim 1, it is characterized in that, for to be provided with key-press module further on this backlight module, and include base plate, multiple push-button unit, film circuit board and at least one flexible member in key-press module, and push-button unit is for being arranged on base plate, and include keycap and be positioned at the connect mechanism that can move up and down for keycap between keycap and base plate, and film circuit board is the below or the top place that are arranged at base plate, flexible member is arranged between film circuit board and multiple push-button unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410144260.6A CN104979124A (en) | 2014-04-11 | 2014-04-11 | Flexible circuit board having shielding effect and applied to keyboard backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410144260.6A CN104979124A (en) | 2014-04-11 | 2014-04-11 | Flexible circuit board having shielding effect and applied to keyboard backlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104979124A true CN104979124A (en) | 2015-10-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410144260.6A Pending CN104979124A (en) | 2014-04-11 | 2014-04-11 | Flexible circuit board having shielding effect and applied to keyboard backlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104979124A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106641884A (en) * | 2016-12-27 | 2017-05-10 | 四川联恺照明有限公司 | LED light source capable of realizing uniform luminescence |
| CN107136573A (en) * | 2017-05-12 | 2017-09-08 | 广东思格雷电子科技股份有限公司 | The electronic cigarette of light guide plate and application light guide plate |
| CN108319072A (en) * | 2017-12-26 | 2018-07-24 | 江西合力泰科技有限公司 | A kind of FPC board manufacturing methods and backlight module for backlight module |
| CN111508753A (en) * | 2019-05-20 | 2020-08-07 | 光宝电子(广州)有限公司 | Backlight module and luminous keyboard |
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| CN101706075A (en) * | 2009-12-07 | 2010-05-12 | 友达光电股份有限公司 | Display device with double-sided display function and backlight module thereof |
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| CN202303018U (en) * | 2011-09-26 | 2012-07-04 | 苏州达方电子有限公司 | Backlight module and light-emitting keyboard |
| US20130163223A1 (en) * | 2010-07-19 | 2013-06-27 | Apple Inc. | Illumination of Input Device |
| JP2013214364A (en) * | 2012-03-30 | 2013-10-17 | Fujikura Ltd | Planar light-emitting device and method for manufacturing the same |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201298483Y (en) * | 2008-09-28 | 2009-08-26 | 达方电子股份有限公司 | Input apparatus |
| CN101922644A (en) * | 2009-06-11 | 2010-12-22 | 华映视讯（吴江）有限公司 | Light source group and backlight module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106641884A (en) * | 2016-12-27 | 2017-05-10 | 四川联恺照明有限公司 | LED light source capable of realizing uniform luminescence |
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| US11515108B2 (en) | 2019-05-20 | 2022-11-29 | Lite-On Electronics (Guangzhou) Limited | Backlight module and luminous keyboard using the same |
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