CN201754384U - Keyboard light guide membrane and keyboard component - Google Patents

Keyboard light guide membrane and keyboard component Download PDF

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Publication number
CN201754384U
CN201754384U CN2010202136624U CN201020213662U CN201754384U CN 201754384 U CN201754384 U CN 201754384U CN 2010202136624 U CN2010202136624 U CN 2010202136624U CN 201020213662 U CN201020213662 U CN 201020213662U CN 201754384 U CN201754384 U CN 201754384U
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CN
China
Prior art keywords
light
keyboard
guiding film
light guiding
groove
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Expired - Fee Related
Application number
CN2010202136624U
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Chinese (zh)
Inventor
王金秋
宋新新
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BYD Co Ltd
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BYD Co Ltd
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Priority to CN2010202136624U priority Critical patent/CN201754384U/en
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Abstract

The utility model provides a keyboard light guide membrane and a keyboard component. The keyboard light guide membrane comprises a light incident surface, a bottom surface and a light emergent surface. The bottom surface and the light emergent surface are both adjacently connected with the light incident surface, and the bottom surface is opposite to the light emergent surface. The keyboard light guide membrane is characterized in that the bottom surface and/or the light emergent surface is provided with light guide screen dots, and a linear light uniformizing groove is further arranged in the keyboard light guide membrane, runs through the bottom surface and the light emergent surface and is obliquely arranged relative to the light incident surface. The keyboard light guide membrane is high in light emergent uniformity, has no need of increasing amount of light sources, and is easily-designed in structure and simple in process.

Description

A kind of keyboard light guiding film and keyboard components
Technical field
The utility model relates to a kind of light guiding film, especially a kind of keyboard light guiding film and keyboard components.
Background technology
At present, the palm electronic product, for example mobile phone etc. is very universal.For in dark surrounds, on electronic product, realize accurately input, need throw light on to keyboard.Usually the method that adopts is in the keyboard bottom illuminator, for example light guiding film to be set.
Light guiding film is by introducing the light that light source sends, and the transmission direction of control light is converted to area source with point-source of light or line source, thereby realizes effective lighting.The light guiding film bottom surface is distributed with the site, in order to destroy the total reflection condition of light in the light guiding film internal transmission, makes it scattering take place reaching whole luminous purpose, and then improves the overall performance of light supply apparatus.
As the instrument that point-source of light is converted to area source, the requirement to the light guiding film light-emitting uniformity in the actual use is very high.But general site design can't be satisfied the requirement of light-emitting uniformity.
In order to improve the light-emitting uniformity of light guiding film, the method that adopts usually in the prior art is the density of the leaded light site of zones of different on the light guiding film for a change.Regulate the purpose of light-emitting uniformity that how much realizes improving light guiding film of zones of different amount of light by the density that changes the leaded light site.But this method need be carried out a large amount of repeated experiments, and regulating effect is not obvious, complex process.
Simultaneously, also once adopted the quantity that increases point-source of light to improve light-emitting uniformity in the prior art, but not only cost is higher for this method, and the power consumption of whole system is higher, the difficulty of spatial design is also bigger, thereby makes its range of application be subjected to very big restriction.
The utility model content
In order to overcome the low problem of keyboard light guiding film light-emitting uniformity of the prior art, the utility model provides a kind of keyboard light guiding film, the light-emitting uniformity height of this keyboard light guiding film, and do not need to increase the quantity of point-source of light, and structure easily designs, and technology is simple.
The keyboard light guiding film that the utility model provides comprises incidence surface, bottom surface and exiting surface, and described bottom surface and exiting surface are all adjacent with incidence surface, and bottom surface and exiting surface be oppositely arranged, and described bottom surface and/or exiting surface are provided with the leaded light site; Also be provided with the even light groove of linear pattern in the described keyboard light guiding film, described even light groove connects bottom surface and exiting surface, and is obliquely installed with respect to incidence surface.
According to the utility model, the material of this keyboard light guiding film can be in Merlon, polyvinyl chloride, polyethylene and the PETG one or more, can be one or more the formed films in Merlon (PC), polyvinyl chloride, polyethylene, the PETG that is:.
Under the preferable case, the width of described even light groove is 0.08-0.12mm, is preferably 0.09-0.1mm.The length of described even light groove can be adjusted according to the actual design condition, and for the keyboard light guiding film of routine, the length of described even light groove is 4-10mm, is preferably 5-8mm.When the width of even light groove and length are in above-mentioned scope, can better improve the effect of even light.
In order to reach good even light effect, described even light groove is obliquely installed with respect to incidence surface, and under the preferable case, described even light groove and incidence surface form 40-60 ° angle, more preferably 45-55 °.
According to the utility model, the even light groove in the described keyboard light guiding film can have many, under the preferable case, has the even light groove of 1-4 bar in the described keyboard light guiding film.By the mating reaction of many even light grooves, better play the effect of even light.
When the keyboard light guiding film have many even light grooves the time, the not too big restriction of relative position between the even light groove for example can make and intersect or parallel.When even light groove intersected in the keyboard light guiding film, described crossing even light groove had a common end points.The even light groove that intersects with a common end points forms an angle, and this end points is the summit at angle, and under the preferable case, the summit at this angle is towards incidence surface.
In the utility model, described even light groove is adjacent with incidence surface, and promptly even light groove is near incidence surface.
Keyboard light guiding film as light source is provided to keyboard needs usually optionally and provides light source to the specific region on the keyboard.This specific region is the zone at button place.Accordingly, on the keyboard light guiding film, with the corresponding key light guide district that is of button, remainder is non-key light guide district, that is, in the utility model, have key light guide district and non-key light guide district on described bottom surface of described keyboard light guiding film and/or the exiting surface, described leaded light site is positioned at the key light guide district, and described even light groove is positioned at non-key light guide district.
Under the preferable case, the thickness of described keyboard light guiding film is 0.1-0.4mm.
Simultaneously, the invention also discloses a kind of keyboard components, comprise button piece, keyboard light guiding film, light source and shell fragment, described keyboard light guiding film is between button piece and shell fragment; Have button on the described button piece, described keyboard light guiding film is above-mentioned keyboard light guiding film, and the exiting surface of described keyboard light guiding film is near button piece; Described light source is positioned at incidence surface one side of keyboard light guiding film; And be the summit with the light source, light source is a benchmark to the vertical line of incidence surface, on described keyboard light guiding film, form ± 60 ° sector region is even light district, described even light groove is positioned at even light district.
This keyboard light guiding film in use, even light groove can reflex to the dark space with the part light in clear zone, reduces the luminance difference between clear zone and the dark space, thereby improves the light-emitting uniformity of keyboard light guiding film.Importantly, in the utility model, even light groove is a linear pattern, can realize evenly reflection to the light that even propagation is come.If adopt arc, because the optically focused effect of cambered surface can be arrived light-ray condensing certain very certain location, the brightness of this position is obviously improved, and the brightness of adjacent locations is not high, has strengthened luminance difference on the contrary, totally unfavorable to improving light-emitting uniformity.And the position of deep-slotted chip breaker and radian are adjusted complicated, are unfavorable for the simplification of technology.
Description of drawings
Fig. 1 is the planar structure schematic diagram of first kind of keyboard light guiding film of the prior art;
Fig. 2 is the planar structure schematic diagram of the keyboard light guiding film of first kind of execution mode providing of the utility model;
Fig. 3 be among Fig. 2 A-A to analysing and observe enlarged diagram;
Fig. 4 is the light path schematic diagram in the keyboard light guiding film shown in Figure 1 use;
Fig. 5 is the light path schematic diagram in the keyboard light guiding film shown in Figure 2 use;
Fig. 6 is the planar structure schematic diagram with keyboard components of keyboard light guiding film shown in Figure 2;
Fig. 7 be among Fig. 6 B-B to analysing and observe enlarged diagram;
Fig. 8 is the planar structure schematic diagram of second kind of keyboard light guiding film of the prior art;
Fig. 9 is the planar structure schematic diagram of the keyboard light guiding film of second kind of execution mode providing of the utility model;
Figure 10 is the light path schematic diagram in the keyboard light guiding film shown in Figure 8 use;
Figure 11 is the light path schematic diagram in the keyboard light guiding film shown in Figure 9 use;
Figure 12 is the planar structure schematic diagram with keyboard components of keyboard light guiding film shown in Figure 9;
Figure 13 is the planar structure schematic diagram of the third keyboard light guiding film of the prior art;
Figure 14 is the planar structure schematic diagram of the keyboard light guiding film of the third execution mode of providing of the utility model;
Figure 15 is the light path schematic diagram in the keyboard light guiding film shown in Figure 13 use;
Figure 16 is the light path schematic diagram in the keyboard light guiding film shown in Figure 14 use;
Figure 17 is the planar structure schematic diagram with keyboard components of keyboard light guiding film shown in Figure 14;
Wherein, Reference numeral: 1, keyboard light guiding film; 2, light source; 3, button piece; 4, shell fragment; 5, keyboard components; 10, incidence surface; 11, bottom surface; 12, exiting surface; 13, key light guide district; 14, even light groove; 31, button.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1 and Figure 4, keyboard light guiding film 1 of the prior art comprises incidence surface 10 bottom surfaces, 11 (not shown)s and exiting surface 12.Have key light guide district 13 on the exiting surface 12, have leaded light site (not shown) in the key light guide district 13.
In the use, the light that light source 2 (being generally the LED lamp) sends enters in the keyboard light guiding film 1.Because the position of light source 2 relation, zones of different is subjected to the amount difference of irradiate light in the keyboard light guiding film 1, and then in use, presents clear zone (being subjected to the many zones of irradiate light) and dark space (being subjected to the few zone of irradiate light) on keyboard light guiding film 1.Because the existence of clear zone and dark space makes keyboard light guiding film 1 produce the low problem of outgoing light homogeneity.Above clear zone and dark space are common clear zone of understanding of those skilled in the art and dark space.In the utility model, being defined in the common keyboard light guiding film 1, is the summit with light source 2, and light source 2 is a benchmark to the vertical line of incidence surface 10, on described keyboard light guiding film 1, form ± 60 ° sector region is the clear zone, i.e. even light district on the disclosed keyboard light guiding film 1 of the utility model.
As existing keyboard light guiding film 1, also there are the low problem of light-emitting uniformity in Fig. 1 and keyboard light guiding film 1 shown in Figure 4.See the light path schematic diagram of Fig. 4, as can be seen general, in two corners near incidence surface 10, because it is few to be subjected to the irradiation of light, brightness must be lower than the brightness of light guiding film zone line, thereby causes the light-emitting uniformity of keyboard light guiding film 1 low.
As Fig. 2,3 and shown in Figure 5, as the disclosed first kind of execution mode of the utility model, keyboard light guiding film 1 comprises incidence surface 10, bottom surface 11 and exiting surface 12.Have key light guide district 13 on the exiting surface 12, have leaded light site (not shown) in the key light guide district 13.Zone beyond the described key light guide district 13 is non-key light guide district, and described even light groove 14 is positioned at non-key light guide district.Specifically, this even light groove 14 has two, is linear pattern and adjacent with incidence surface 10, runs through bottom surface 11 and exiting surface 12.Described even light groove 14 is obliquely installed with respect to incidence surface 10, and the angle that is specially even light groove 14 and incidence surface 10 is 45 °, and the two direction is opposite.In order not influence the light effect that of even light groove 14 positions, the width of above-mentioned two even light grooves 14 is 0.1mm, and length is 5.3mm.The thickness of above-mentioned keyboard light guiding film 1 is 0.125mm.Above direction may be defined as on the contrary: with incidence surface 10 is benchmark, respectively with clockwise and the angle that rotates in a counter-clockwise direction formation be the opposite angle of direction.
From the light path schematic diagram of Fig. 5 as can be seen, this keyboard light guiding film 1 in use, when the light process that light source 2 sends is spared light groove 14, part is reflected to a left side or the upper right corner of keyboard light guiding film 1, increased should the zone the irradiate light amount, improve luminosity herein, thereby improved the light-emitting uniformity of keyboard light guiding film 1.
Those skilled in the art in order to regulate the brightness of zones of different, can adjust the angle of inclination of even light groove 14 in actual design process, change the direction of reflection ray, thereby reach the purpose of adjusting irradiation area.
As shown in Figure 6 and Figure 7, adopt the keyboard components 5 of keyboard light guiding film shown in Figure 21 preparation to comprise button piece 3, keyboard light guiding film 1, light source 2 and shell fragment 4, described keyboard light guiding film 1 is between button piece 3 and shell fragment 4; Has button 31 on the described button piece 3, as " 1 " among Fig. 6, " 3 ", " # " etc.Exiting surface 12 1 sides of keyboard light guiding film 1 are near button piece 3; Described light source 2 is positioned at incidence surface 10 1 sides of keyboard light guiding film 1; Even light groove 14 is positioned at described even light district, and concrete, 2 even light grooves 14 face 2 light sources 2 respectively.Button is positioned on the button piece 3 side towards keyboard light guiding film 1, and is outstanding structure.
In use, the light that light source 2 sends is after incidence surface 10 enters keyboard light guiding film 1, position at even light groove 14 produces reflection, with the zone of part light emission to " 1 " and " 3 " of button 31, improve this regional brightness, thereby improved the light-emitting uniformity of the disclosed keyboard light guiding film 1 of the utility model.Method as those skilled in the art are easy to expect can improve other regional brightness by the angle of adjusting even light groove 14.
As Fig. 8 and shown in Figure 10, the another kind of keyboard light guiding film 1 that distributes of the prior art has incidence surface 10, bottom surface 11 (not shown)s and exiting surface 12 equally.Have key light guide district 13 on the exiting surface 12, have leaded light site (not shown) in the key light guide district 13.Even under the situation of using two light sources 2, the light amount of the suffered irradiation in subregion in key light guide district 13 still seldom.
By contrast, see Fig. 9 and Figure 11, the keyboard light guiding film 1 of the disclosed second kind of execution mode of the utility model comprises incidence surface 10, bottom surface 11 and exiting surface 12.Have key light guide district 13 on the exiting surface 12, have leaded light site (not shown) in the key light guide district 13.Four even light grooves 14 are arranged in the non-key light guide district, be divided into two groups, every group of two even light grooves 14, and these two intersect and have common end points.This end points is towards incidence surface 10, and when using, this end points faces light source 2.Certainly,, can only adopt a light source 2, and two crossing even light grooves 14 get final product as the equivalent deformation of this structure.The width of above-mentioned even light groove 14 is 0.09mm, and length is 9.7mm, and even light groove 14 is 45 ° with the angle of incidence surface 10, and the direction of two even light grooves 14 that intersect is opposite, and runs through bottom surface 11 and exiting surface 12.
In the use, the light that light source 2 sends can make key light guide district 13 obtain more uniform irradiation through the reflection of even light groove 14, improves the light-emitting uniformity of keyboard light guiding film 1.
As shown in figure 12, the keyboard components 5 that adopts keyboard light guiding film 1 shown in Figure 9 to prepare comprises button piece 3, keyboard light guiding film 1 (not shown), light source 2 and shell fragment 4 (not shown)s, and described keyboard light guiding film 1 is between button piece 3 and shell fragment 4; Have button 31 on the described button piece 3, exiting surface 12 1 sides of keyboard light guiding film 1 are near button piece 3; Described light source 2 is positioned at incidence surface 10 1 sides of keyboard light guiding film 1; Even light groove 14 is positioned at described even light district.The luminous energy that evenly goes out of keyboard light guiding film 1 makes button 31 on the button piece 3 obtain the demonstration of uniform luminance.
Similarly, as Figure 13 and shown in Figure 15, the keyboard light guiding film 1 of the third distribution of the prior art only has incidence surface 10, bottom surface 11 (not shown)s and exiting surface 12.Have key light guide district 13 on the exiting surface 12, have leaded light site (not shown) in the key light guide district 13.When through 2 irradiations of a light source, two degree differences that key light guide district 13 is shone, and the degree of illumination that same key light guide district 13 is subjected to is also different, has had a strong impact on the light-emitting uniformity of keyboard light guiding film 1.
Figure 14,16 and Figure 17 show the structure of keyboard light guiding film 1 of disclosed the third execution mode of the utility model and the keyboard components 5 that adopts this keyboard light guiding film 1 to prepare.Equally, this keyboard light guiding film 1 comprises incidence surface 10, bottom surface 11 and exiting surface 12.Have key light guide district 13 on the exiting surface 12, have leaded light site (not shown) in the key light guide district 13.Only offer an even light groove 14 in the non-key light guide district, close on incidence surface 10 and light source 2 settings.Its length is 30mm, and width is 0.11mm, forms 50 ° angle with incidence surface 10, and should run through bottom surface 11 and exiting surface 12 by even light groove 14.
The keyboard components 5 for preparing by this keyboard light guiding film 1 comprises button piece 3, keyboard light guiding film 1 (not shown), light source 2 and shell fragment 4 (not shown)s equally, and described keyboard light guiding film 1 is between button piece 3 and shell fragment 4; Have button 31 on the described button piece 3, exiting surface 12 1 sides of keyboard light guiding film 1 are near button piece 3; Described light source 2 is positioned at incidence surface 10 1 sides of keyboard light guiding film 1; Even light groove 14 is positioned at described even light district.The luminous energy that evenly goes out of keyboard light guiding film 1 makes button 31 on the button piece 3 obtain the demonstration of uniform luminance.
Above-mentioned first and second all can be with keyboard light guiding film 1 precursor (preparing keyboard light guiding film 1 precursor as the method that can adopt printing, hot pressing and moulding) of leaded light site by the method preparation for preparing keyboard light guiding film 1 in the prior art with the keyboard light guiding film 1 in three kinds of execution modes, light groove 14 is spared in preparation on this keyboard light guiding film 1 precursor then, 14 of described even light grooves can be finished in the process of cross cutting in the lump with frame, promptly finish the making of even light groove 14 with the mode of cross cutting.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims (9)

1. a keyboard light guiding film comprises incidence surface, bottom surface and exiting surface, and described bottom surface and exiting surface are all adjacent with incidence surface, and bottom surface and exiting surface be oppositely arranged, and it is characterized in that: described bottom surface and/or exiting surface are provided with the leaded light site;
Also be provided with the even light groove of linear pattern in the described keyboard light guiding film, described even light groove connects bottom surface and exiting surface, and is obliquely installed with respect to incidence surface.
2. keyboard light guiding film according to claim 1 is characterized in that, the width of described even light groove is 0.08-0.12mm.
3. keyboard light guiding film according to claim 1 and 2 is characterized in that, described even light groove and incidence surface form 40-60 ° angle.
4. keyboard light guiding film according to claim 3 is characterized in that, has the even light groove of 1-4 bar in the described keyboard light guiding film.
5. according to claim 1 or 4 described keyboard light guiding film, it is characterized in that having crossing even light groove in the described keyboard light guiding film, described crossing even light groove has common end points.
6. keyboard light guiding film according to claim 5 is characterized in that, described even light groove is adjacent with incidence surface.
7. keyboard light guiding film according to claim 1, it is characterized in that, have key light guide district and non-key light guide district on described bottom surface of described keyboard light guiding film and/or the exiting surface, described leaded light site is positioned at the key light guide district, and described even light groove is positioned at non-key light guide district.
8. according to any described keyboard light guiding film in the claim 1,2,4,6 or 7, it is characterized in that the thickness of described keyboard light guiding film is 0.1-0.4mm.
9. a keyboard components comprises button piece, keyboard light guiding film, light source and shell fragment, and described keyboard light guiding film is between button piece and shell fragment; Have button on the described button piece, it is characterized in that, described keyboard light guiding film is any described keyboard light guiding film among the claim 1-8, and the exiting surface of described keyboard light guiding film is near button piece; Described light source is positioned at incidence surface one side of keyboard light guiding film; With the light source is the summit, and light source is a benchmark to the vertical line of incidence surface, on described keyboard light guiding film, form ± 60 ° sector region is even light district, described even light groove is positioned at described even light district.
CN2010202136624U 2010-05-29 2010-05-29 Keyboard light guide membrane and keyboard component Expired - Fee Related CN201754384U (en)

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CN2010202136624U CN201754384U (en) 2010-05-29 2010-05-29 Keyboard light guide membrane and keyboard component

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105530349A (en) * 2016-01-08 2016-04-27 珠海格力电器股份有限公司 Key light guide structure and mobile phone
CN108644825A (en) * 2018-07-17 2018-10-12 广东太古电器科技有限公司 A kind of display structure and electromagnetic oven

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105530349A (en) * 2016-01-08 2016-04-27 珠海格力电器股份有限公司 Key light guide structure and mobile phone
CN108644825A (en) * 2018-07-17 2018-10-12 广东太古电器科技有限公司 A kind of display structure and electromagnetic oven

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110302

Termination date: 20190529

CF01 Termination of patent right due to non-payment of annual fee