CN105703758A - Backlight touch key - Google Patents
Backlight touch key Download PDFInfo
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- CN105703758A CN105703758A CN201410712075.2A CN201410712075A CN105703758A CN 105703758 A CN105703758 A CN 105703758A CN 201410712075 A CN201410712075 A CN 201410712075A CN 105703758 A CN105703758 A CN 105703758A
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- touch key
- press
- backlight
- light
- backing structure
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Abstract
The present invention relates to the technical field and provides a backlight touch key which comprises a panel which is provided with a touch key. A PCB is attached under the panel. The PCB is provided with a light source for projecting light toward the touch key opposite to the touch key. The outer periphery cover of the light source is provided with a backlight structure for uniformly dispersing the light emitted by the light source. After the light emitted by the light source is uniformly dispersed by the backlight structure, the light is projected to the touch key, then after the light is homogenized by touch key which is a translucent material, uniform backlight is formed on the touch key by the light, and thus the backlight touch key has the advantages of good control effect, small space occupation, flexible backlight control, uniform backlight and low cost and is suitable for a single LED control large character touch key.
Description
Technical field
The invention belongs to the technical field of touch key-press, particularly relate to backlight touch key-press。
Background technology
Along with the development of electronic technology, the design direction of various electronic products all develops towards frivolous easy-to-use direction, makes every effort to integrate more function in as far as possible few volume, controls production cost while improving product appearance simultaneously。Traditional mechanical key is replaced by overall compact touch key-press or touch screen greatly and gradually due to cost height volume, and touch key-press is due to less costly, is more and more applied to electronic product。
Structure at touch key-press includes: be arranged on backing structure outermost, carrying touch key-press panel and as make touch key-press realize the circuit board of manipulation function, surface formation printed circuit keypad, for ensureing that the touch key-press on panel is capable of controlling accordingly function, keypad must be in close contact and adhesion with the panel of product。Because the touch key-press that user None-identified is concrete in dark conditions, so it is necessary for touch key-press to add the structure of backlight。
The backing structure of touch key-press of the prior art substantially has following several:
Fig. 1 is the first touch key-press 10 structural representation of prior art。
As shown in Figure 1, touch key-press 10 includes panel 1, keypad 2, even smooth film the 3, the oneth LED4 and the 2nd LED5, and even smooth film 3 is located between panel 1 and keypad 2, a LED4 and the 2nd LED5, it is respectively arranged on keypad 2 and the both sides of even smooth film 3, and gives light in lateral。But, even smooth film 3 not easily realizes in some specific touch key-presss 6, and the existence of even smooth film 3 also can weaken sense of touch between touch key-press 6 and keypad 2, has influence on the touch-control effect of touch key-press 6；Additionally, due to adopt same even smooth film 3 to all touch key-press 6 backlights, therefore, all touch key-presss 6 can only be turned on and off simultaneously, and its overall touch key-press 6 taking up room on panel 1 is bigger；Due to the color only one of the backlight of same even smooth film 3 correspondence, reduce the motility of backlight control；It is important that, owing to adopting a LED4 and the 2nd LED5 two light source to carry out laterally to light, make the brightness of region light source middle for a LED4 and the 2nd LED5 by dark for ratio, therefore, on panel 1, each touch key-press 6 must be made smaller, and interval each other is little, and it is only applicable to small characters touch key-press, but it is big that it still suffers from the difference in brightness of each touch key-press 6 on panel 1, the phenomenon that backlight is uneven。
Fig. 2 is the second touch key-press 10 schematic diagram of prior art。
As shown in Figure 2, touch key-press 10 includes panel 1, keypad 2 and backlight 3, backlight 3 arranges backlight 4, and keypad 2 gets through hole, and that this structural requirement backlight 4 is launched is just uniform, and in order to realize uniform backlight, it sets up even tabula rasa, so, not only cost increases, and complex process。Such as, in backlight 3, directly use some LED4, through hole is set on keypad 2 simultaneously, makes light be mapped on the touch key-press panel 1 from through hole, then easily make backlight uneven, produce " pocket lamp " effect。
Fig. 7 is the third touch key-press 10 schematic diagram of prior art。
As it is shown in fig. 7, as notification number is: the backing structure 10 of the touch key-press key disclosed in CN102032497A, comprising: panel 1, it is arranged on the outermost of backing structure, carries touch key-press；Keypad 2, as the circuit board making touch key-press realize manipulation function, surface forms printed circuit, is close to panel and arranges；Backlight 3, backlight is formed the backlight of luminescence, its keypad 2 is arranged between panel 1 and backlight 3, the position of the touch key-press corresponding to panel 1 on keypad 2 forms translucent transmittance section, homogenized by transmittance section when the light that backlight A, B, C produce is through transmittance section, and be radiated at the back side of touch key-press。But there is this such problem in it:
One, the keypad 2 that surface has printed circuit is located between panel 1 and backlight 3, so, at backlight A, B, the light that C sends, first through after backlight 3, it is transmitted on the touch key-press of panel 1 through keypad 2 again, and owing to keypad 2 having printed circuit, printed circuit has color, and its transmittance section being translucent still suffers from this impurity, therefore, the light projected after keypad 2 transmission on panel 1 touch key-press will have the impurity such as aberration and shade, so, affect the backlight effect of touch key-press, make backlight on touch key-press uneven。
Two, after the light therethrough backlight 3 that each backlight A, B, C sends, first it is transmitted on keypad 2, a part of light is via keypad 2 transmissive, a part is via keypad 2 back into backlight plate 2, and backlight 3 integral covering backlight A, B, C, and setting facing with keypad 2, so, the light reflected will come and go reflection between backlight 3 and keypad 2, each backlight, will result in the phenomenon of multiple spot optical crosstalk。
Summary of the invention
It is an object of the invention to provide backlight touch key-press, it is intended to solve existing touch key-press touch-control weak effect, to take panel space big, the very flexible of backlight control, backlight are uneven, cost is high, there is backlight aberration, the problem of impurity and multiple spot optical crosstalk。
For solving above-mentioned technical problem, the technical scheme of backlight touch key-press provided by the invention is, it includes panel, described panel is provided with touch key-press, described lower panels is sticked for making described touch key-press realize the pcb board of manipulation function, position relative with described touch key-press on described pcb board is provided with for towards the light source of throw light on described touch key-press, and the peripheral closure of described light source is provided with the finely dispersed backing structure of the light for being sent by described light source。
Further, described light source is LED, and the quantity of described LED is multiple, and each described LED is independently arranged, and each described LED is all correspondingly provided with backing structure described in one and touch key-press described in。
Further, being provided with soft layer between described backing structure and described pcb board, described LED is placed through in described soft layer, and described panel, described backing structure, described soft layer and described pcb board are sequentially fitted, and mutually form interference fit。
Further, described backing structure has plane on, and described upper plane is parallel with described panel plane and described pcb board plane。
Further, described upper plane is provided with the finely dispersed diffusion layer of light for being penetrated by described upper plane。
Further, described LED be located on described pcb board just in the face of described upper planar central position on, described diffusion layer be covered in described in the heart。
Further, the region that described pcb board is covered by described backing structure is provided with for by the light reflector layer towards described upper plane reflection。
Further, described backing structure covers at the surface of described LED periphery is a uniform smooth surface of light transmission for being sent by described LED。
Further, the region area covered by described backing structure on described pcb board is less than or equal to the area of described reflector layer。
Further, described panel medial surface is convexly equipped with the first enclosure wall for strengthening light line reflection on the periphery of described touch key-press。
The present invention compares the beneficial effect of prior art:
Panel and pcb board is adopted due to above-mentioned backlight touch key-press, panel is provided with touch key-press, pcb board arranges light source, the peripheral closure of light source is provided with backing structure, so, after the light that light source is launched first passes through being uniformly dispersed of backing structure, project formation uniform backlight on touch key-press again, compare existing touch key-press, owing to it adopts backing structure independently to cover the effect setting light source periphery and realize even back, therefore avoid owing to adopting even smooth film to make the touch-control weak effect of touch key-press, take panel space big, the problem of the very flexible of backlight control, avoid owing to adopting two light sources laterally to make touch key-press little to light, touch key-press interval is little, touch key-press difference in brightness is big, the problem that backlight is uneven, avoid owing to punching on keypad, set up the touch key-press cost height that equal tabula rasa causes, the problem that backlight is uneven, in addition, the light that light source sends is after backing structure, it is projected directly on touch key-press, and avoid passing through pcb board, thus avoiding the problem that there are the impurity such as shade in backlight aberration and backlight, and, backing structure independently covers at the periphery of light source, and non-integral is relative with panel, thus avoiding light between backing structure and panel, the problem that reflection produces multiple spot optical crosstalk is come and gone between each light source, in a word, above-mentioned backlight touch key-press takes up room little, even back, cost is low, and it is absent from color difference, backlight impurity and optical crosstalk, and suitable in the big character touch key-press of single led control。
Accompanying drawing explanation
Fig. 1 is the sectional view of the first touch key-press that prior art provides；
Fig. 2 is the sectional view of the second touch key-press that prior art provides；
Fig. 3 is the perspective view of the backlight touch key-press that the embodiment of the present invention provides；
Fig. 4 is the perspective view of the pcb board of backlight touch key-press that provides of the embodiment of the present invention and backing structure；
Fig. 5 is the perspective view of the pcb board of backlight touch key-press that provides of the embodiment of the present invention and LED；
Fig. 6 is the perspective view of the panel of the backlight touch key-press that the embodiment of the present invention provides；
Fig. 7 is the sectional view of the third touch key-press that prior art provides；
Fig. 8 is the sectional view of the part-structure of the backlight touch key-press that the embodiment of the present invention provides。
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated。Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention。
As shown in Fig. 3～6 and Fig. 8, for preferred embodiment provided by the invention。
It should be noted that be referred to as " being fixed on " or " being arranged at " another parts when parts, it can directly on another parts or may be simultaneously present parts placed in the middle。When parts are known as " being connected to " another parts, it can be directly to another parts or may be simultaneously present parts placed in the middle。
Also, it should be noted the orientation term such as left and right, upper and lower in the present embodiment, be only relative concept or with the normal operating condition of product for reference each other, and should not be regarded as have restrictive。
As shown in Figures 3 to 5, the backlight touch key-press 10 that the present embodiment provides, it includes panel 11, panel 11 is provided with touch key-press 12, it is sticked for making touch key-press 12 realize the pcb board 13 of manipulation function below panel 11, position relative with touch key-press 12 on pcb board 13 is provided with for towards the light source 14 of throw light on touch key-press 12, and the peripheral closure of light source 14 is provided with the finely dispersed backing structure 15 of the light for being sent by light source 14。
The backlight touch key-press 10 that the present embodiment provides beneficial effect compared to existing technology:
As shown in Figures 3 to 5, panel 11 and pcb board 13 is adopted due to above-mentioned backlight touch key-press 10, panel 11 is provided with touch key-press 12, pcb board 13 arranges light source 14, the peripheral closure of light source 14 is provided with backing structure 15, so, after the light that light source 14 is launched first passes through being uniformly dispersed of backing structure 15, project formation uniform backlight on touch key-press 12 again, compare existing touch key-press 12, the effect of even back is realized owing to it adopts the independent cover of backing structure 15 to set light source 14 periphery, therefore avoid owing to adopting even smooth film to make the touch-control weak effect of touch key-press 12, take panel 11 space big, the problem of the very flexible of backlight control, avoid owing to adopting two light sources 14 laterally to make touch key-press 12 little to light, touch key-press 12 interval is little, touch key-press 12 difference in brightness is big, the problem that backlight is uneven, avoid owing to punching on keypad, set up the touch key-press 12 cost height that equal tabula rasa causes, the problem that backlight is uneven, in addition, the light that light source 14 sends is after backing structure 15, it is projected directly on touch key-press 12, and avoid passing through pcb board 13, thus avoiding the problem that there are the impurity such as shade in backlight aberration and backlight, and, backing structure 15 independently covers at the periphery of light source 14, and non-integral is relative with panel 11, thus avoiding light between backing structure 15 and panel 11, the problem that reflection produces multiple spot optical crosstalk is come and gone between each light source 14, in a word, above-mentioned backlight touch key-press 10 takes up room little, touch-control is effective, even back, cost is low, and it is absent from color difference, backlight impurity and optical crosstalk, and control big character touch key-press 12 suitable in single led 141。
In the present embodiment, it is preferable that as it is shown in figure 5, light source 14 is LED141, in other embodiments, light source 14 can also be LCD etc., and the employing of light source 14 also not only limits the present embodiment。
It should be noted that touch key-press 12 is generally circular in shape, specifically, can determine according to specifically used situation。
Refinement ground, the quantity of LED141 is multiple, and each LED141 is independently arranged, and each LED141 is all correspondingly provided with backing structure 15 and a touch key-press 12。In this manner it is achieved that multiple LED141 independently control multiple touch key-press 12, namely can adopt the LED141 of different colours that touch key-press 12 is carried out backlight so that the display effect of touch key-press 12 is more colorful so that the motility of backlight control is bigger。
As shown in Figure 8, due to when assembling panel 11 with backing structure 15, assembly error can be there is, and make the excesssive gap that there is gap or existence between panel 11 and the upper plane 151 of backing structure 15, excessive gap will affect the touch-control effect of touch key-press 12 on panel 11, therefore, in order to eliminate this gap, it is provided with soft layer 16 between described backing structure 15 and described pcb board, described LED is placed through in described soft layer 16, described panel 11, described backing structure 15, described soft layer 16 and described pcb board 13 are sequentially fitted, and mutually form interference fit。
As shown in Figures 3 to 5, so that the light that LED141 is sent by backing structure 15 is more uniformly distributed dispersedly, backing structure 15 has plane 151 on, and upper plane 151 is parallel with the plane of panel 11 and pcb board 13 plane, so, the light that on pcb board 13, LED141 sends first penetrates via plane 151 on backing structure 15, and it is perpendicular to most light of plane 151 injection, to vertically be projeced on panel 11 on touch key-press 12, last backlight on touch key-press 12, therefore, the upper plane 151 of backing structure 15 is parallel with panel 11 plane, advantageously reduce the loss that light is propagated, be conducive to strengthening the brightness of backlight on touch key-press 12；The more important thing is, penetrate owing to overwhelming majority light is perpendicular to upper plane 151, and along light propagate route perpendicular projection on the touch key-press 12 that upper plane 151 is facing, therefore, decrease light and project the generation of the optical crosstalk phenomenon caused on other touch key-presss 12。
It should be noted that backing structure 15 is white clear material, it is preferable that backing structure 15 is white clear plastic cement。
As shown in Figure 4 and Figure 5, in order to further make the light that LED141 is sent by backing structure 15 be uniformly dispersed, upper plane 151 is provided with the finely dispersed diffusion layer 152 of the light for being penetrated by upper plane 151。So, LED141 the light launched is first via after plane 151 astigmatism injection on backing structure 15, further via the uniform astigmatism of diffusion layer 152。
Due to LED141 just faced by upper plane 151 position on, the brightness of backlight is relatively big, therefore, so that overall backlight is soft, uniform in upper plane 151, LED141 be located on pcb board 13 just in the face of upper plane 151 center position on, and diffusion layer 152 be covered in in the heart。
Refinement ground, diffusion layer 152 quantity is multilamellar, so, according to the difference degree at upper plane 151 center Yu surrounding brightness, can successively increase and arrange diffusion layer 152, and above plane 151 Center-to-Center surrounding brightness is uniformly as the criterion。
As shown in Figures 3 to 5, in order to strengthen the backlight intensity on touch key-press 12, the region that pcb board 13 is covered by backing structure 15 is provided with the reflector layer 142 for being reflected by light towards upper plane 151。
Due in the light launched at LED141, a part is gone out via upper plane 151 transmission of backing structure 15, a part is reflected back into bottom surface by medial surface and the surrounding wall of upper plane 151, namely return on the region covered by backing structure 15, and on this region, set up reflector layer 142, the light that will be reflected on this region is conducive to again to be reflected back plane 151, go out via the transmission of upper plane 151, so, the light gone out by the transmission of upper plane 151 increases, it is projeced into the light on touch key-press 12 also will increase, therefore, enhance the backlight intensity on touch key-press 12。
As shown in Figure 8, for the uniform light transmission sent by LED141, it is a smooth surface 153 that described backing structure 15 covers at the surface of described LED141 periphery。So, the light part that LED141 sends is gone out via smooth surface 153 transmission, a part reflects back on LED141 and reflector layer 142 via smooth surface 153, and owing to smooth surface 153 surface smooths, the diffuse-reflectance of light can be reduced, the light being reflected back on reflector layer 142 by smooth surface 153 will be increased, therefore, it is reflected back the light on smooth surface 153 by reflector layer 142 will increase, go out then through by smooth surface 153 transmission, go out owing to projecting light all some transmissions on smooth surface 153 every time, a part reflects back, and light constantly comes and goes between smooth surface 153 and reflector layer 142 and launches, the light of transmissive portion will be continuously increased, generally speaking, reach to strengthen backlight intensity, improve the effect of backlight effect。
Specifically, the cross section of smooth surface 153 is parabola, and so, via the light that smooth surface 153 surface transmission is gone out, its angle of emergence is all vertical with cross section parabola, therefore, will be more uniformly distributed via the light of smooth surface 153 outgoing, and be conducive to even back。
Preferably, in the present embodiment, smooth surface 153 is sphere, and in other embodiments, smooth surface 153 can also be ellipsoid。
In order to ensure that being reflected back the light on reflector layer 142 by smooth surface 153 is all reflected back on smooth surface again, the region area covered by described backing structure 15 on described pcb board 13 is less than or equal to the area of described reflector layer 142, namely the region area that smooth surface 153 covers is less than the area of reflector layer 142, and the region area that backing structure 15 covers again smaller than or equal to the area of touch key-press 12, be so conducive to strengthening touch-control effect。Due to when backing structure 15 is installed on pcb board, it is easy to the situation occurring smooth surface 153 inaccurate with LED141 para-position, therefore, so that smooth surface 153 is accurate with LED141 para-position, described backing structure 15 covers at and is convexly equipped with angle 154 on the surface of described LED141 periphery, the both sides of 154 smooth surfaces 153 of angle or periphery, and run through soft layer 16 and be inserted on pcb board 13, so, the region area covered at backing structure 15 again smaller than or equal to the area of touch key-press 12, and backing structure 15 tends to miniaturization, in microminiaturized design, cause dislocation or location inaccurate owing to adopting angle 154 to be not easy to。
Additionally, as shown in Figures 3 to 6, in order to strengthen the backlight intensity on touch key-press 12, it is also possible to be, panel 11 medial surface is convexly equipped with on the periphery of touch key-press 12 the first enclosure wall 111 for strengthening light line reflection。
Light by plane 151 transmit in the process being projeced on touch key-press 12, the light path centered by touch key-press 12 can be formed, setting due to the first enclosure wall 111, the region making the contiguous touch key-press 12 of light path will diminish, the region that light path is done with the first enclosure wall 111 is equal, it is approximately equal to the region at touch key-press 12 place, and, to be reflected back with in touch key-press 12 region by the first enclosure wall 111 owing to projecting the light on the first enclosure wall 111, so, also it is beneficial to strengthen the backlight intensity of touch key-press 12。
Certainly, similarly, as shown in Figures 3 to 5, in order to strengthen the backlight intensity of touch key-press 12, pcb board 13 is provided with in the periphery of backing structure 15 the second enclosure wall (not shown) for strengthening light line reflection。So, transmit via backing structure 15, and be transmitted to light on the second enclosure wall by be reflected back on backing structure 15 centered by plane 151 by the second enclosure wall light path in, so, also will increase via the light of backing structure 15 injection, the light being projeced on touch key-press 12 is consequently increased, and in a word, is conducive to strengthening the backlight intensity of touch key-press 12。
So that light the touch key-press 12 region backlight being projeced on panel 11, all light tight in the periphery of touch key-press 12 on panel 11。
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention。
Claims (10)
1. backlight touch key-press, it is characterized in that: include panel, described panel is provided with touch key-press, described lower panels is sticked for making described touch key-press realize the pcb board of manipulation function, position relative with described touch key-press on described pcb board is provided with for towards the light source of throw light on described touch key-press, and the peripheral closure of described light source is provided with the finely dispersed backing structure of the light for being sent by described light source。
2. backlight touch key-press as claimed in claim 1, it is characterised in that: described light source is LED, and the quantity of described LED is multiple, and each described LED is independently arranged, and each described LED is all correspondingly provided with backing structure described in one and touch key-press described in。
3. backlight touch key-press as claimed in claim 2, it is characterized in that: between described backing structure and described pcb board, be provided with soft layer, described LED is placed through in described soft layer, described panel, described backing structure, described soft layer and described pcb board are sequentially fitted, and mutually form interference fit。
4. backlight touch key-press as claimed in claim 3, it is characterised in that: described backing structure has plane on, and described upper plane is parallel with described panel plane and described pcb board plane。
5. backlight touch key-press as claimed in claim 4, it is characterised in that: described upper plane is provided with the finely dispersed diffusion layer of light for being penetrated by described upper plane。
6. backlight touch key-press as claimed in claim 5, it is characterised in that: described LED be located on described pcb board just on the position of described upper planar central, described diffusion layer be covered in described in the heart。
7. backlight touch key-press as claimed in claim 6, it is characterised in that: the region that described pcb board is covered by described backing structure is provided with for by the light reflector layer towards described upper plane reflection。
8. backlight touch key-press as claimed in claim 7, it is characterised in that: it is a uniform smooth surface of light transmission for being sent by described LED that described backing structure covers at the surface of described LED periphery。
9. backlight touch key-press as claimed in claim 8, it is characterised in that: the region area covered by described backing structure on described pcb board is less than or equal to the area of described reflector layer。
10. backlight touch key-press as claimed in claim 9, it is characterised in that: described panel medial surface is convexly equipped with the first enclosure wall for strengthening light line reflection on the periphery of described touch key-press。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712075.2A CN105703758B (en) | 2014-11-28 | 2014-11-28 | Backlight touch key-press |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712075.2A CN105703758B (en) | 2014-11-28 | 2014-11-28 | Backlight touch key-press |
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| Publication Number | Publication Date |
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| CN105703758A true CN105703758A (en) | 2016-06-22 |
| CN105703758B CN105703758B (en) | 2018-11-23 |
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| CN201410712075.2A Active CN105703758B (en) | 2014-11-28 | 2014-11-28 | Backlight touch key-press |
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| CN108008867A (en) * | 2017-11-24 | 2018-05-08 | 惠州市德赛西威汽车电子股份有限公司 | A kind of capacitance plate touch key-press uniformly highlighted |
| CN110580106A (en) * | 2018-06-11 | 2019-12-17 | 中车株洲电力机车研究所有限公司 | display control panel and assembling method |
| CN111969991A (en) * | 2020-08-17 | 2020-11-20 | 业成科技（成都）有限公司 | Three-dimensional touch device and control method thereof |
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| CN111969991B (en) * | 2020-08-17 | 2023-08-01 | 业成科技（成都）有限公司 | Three-dimensional touch device and control method thereof |
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