CN102192479B - Light guide sheet, sheet with contact spring and switching device - Google Patents
Light guide sheet, sheet with contact spring and switching device Download PDFInfo
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- CN102192479B CN102192479B CN2011100380844A CN201110038084A CN102192479B CN 102192479 B CN102192479 B CN 102192479B CN 2011100380844 A CN2011100380844 A CN 2011100380844A CN 201110038084 A CN201110038084 A CN 201110038084A CN 102192479 B CN102192479 B CN 102192479B
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- Prior art keywords
- light
- mentioned
- guide sheet
- irradiation
- irradiation zone
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/056—Diffuser; Uneven surface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/062—Light conductor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Push-Button Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a light guide sheet, a sheet with a contact spring, and a switching device, wherein while independently illuminating a plurality of irradiation regions, light leak between the regions can be reduced without increasing cost. The light guide sheet (13) guides light emitted by a light source unit (5) into the irradiation regions (16) and gives off the guided light in the irradiation regions (16); and the light guide sheet (13) is divided into irradiation regions (16A1-4) of multiple colours and a white irradiation region (16B) through a plurality of grooves (31). Besides, the light source unit (5R3) is configured so that the light emergent direction thereof is toward the end face (35) of the light guide sheet on the irradiation region (16A1) of multiple colours divided through the end face (35) of the light guide sheet and the grooves (31); in this way, the light leak of red light to the white irradiation region (16B) is reduced.
Description
Technical field
The present invention relates to sheet and the switching device of a kind of light guide sheet, contact-carrying spring, relate in particular to the light guide sheet on the miniaturized electronics such as being assembled in portable phone, sheet and the switching device of contact-carrying spring.
Background technology
Developed in the past the light guide sheet of the operated key of the portable terminals such as irradiation portable phone.This light guide sheet is formed by translucent material, and is installed on the circuit board of portable terminal.And, near the end of light guide sheet, being provided with light source, the light of light source emission is injected in the light guide sheet from the end face of light guide sheet.Inject the interior light of light guide sheet being formed at the locational irradiation regional diffusion corresponding with the operated key of portable terminal, illuminate operated key from the inboard.
But in recent years, along with the functional diversities of portable terminal, also developed with the color different from other operated key and illuminated the portable terminal that specific operated key comes the user is guided method of operating.This portable terminal is because illuminate the irradiation zone of specific operation key and the irradiation zone of other operated key with different glow colors, so adopted the light guide sheet (for example, with reference to patent documentation 1) that suppresses colour mixture between the adjacent irradiation zone.The light guide sheet that patent documentation 1 is put down in writing is by dividing a plurality of irradiations zone with groove, and covers the end face of groove with light screening material, alleviates interregional light leak.
Patent documentation 1: TOHKEMY 2009-146653 communique
But the light guide sheet in that above-mentioned patent documentation 1 is put down in writing although alleviate interregional light leak with groove and light screening material, must arrange light screening material at the end face of groove, thereby increases the problem that cost strengthens when existing because of worker.
Summary of the invention
The present invention proposes in view of above-mentioned actual conditions, and its purpose is to provide a kind of and does not strengthen cost also can alleviate the light guide sheet of interregional light leak, sheet and the switching device of contact-carrying spring when illuminating separately a plurality of irradiations zone.
Light guide sheet of the present invention, to import the irradiation zone and in above-mentioned irradiation zone, emit the light of importing from the light of light source, it is characterized in that, be divided into a plurality of irradiations zone by groove, and the 1st irradiation zone of being divided by light guide sheet end face and groove in above-mentioned a plurality of irradiations zone has the 1st light in part, and the 1st light in part is configured to make and enters light direction towards this light guide sheet end face from the light of the 1st light source.
According to this structure because the light of injecting the 1st irradiation zone from the 1st light in part by other ground, irradiation zone towards the light guide sheet end face, so can alleviate from the 1st irradiation zone to other irradiation zone light leak.Simultaneously, can not alleviate light leak to other irradiation zone because light screening material is not set on groove yet, so do not increase manufacturing process, not strengthen cost yet.
And, the invention is characterized in, in above-mentioned light guide sheet, above-mentioned the 1st irradiation zone is regional with irradiation for the polychrome with the 2nd light in part, the 2nd light in part is from the glow color 2nd light source incident light different from above-mentioned the 1st light source, and above-mentioned the 2nd light in part is configured to, make incident direction from the light of above-mentioned the 2nd light source towards the light guide sheet end face of dividing above-mentioned the 1st irradiation zone, and intersect with the incident direction of the light of above-mentioned the 1st light source emission.
According to this structure, because also do not pass through other ground, irradiation zone directive light guide sheet end face from the light in the 2nd light in part incident the 1st irradiation zone, even the 1st irradiation zone is regional with irradiation for polychrome, also can alleviate to other irradiation zone light leak.And, because the light incident direction of the 1st light source and the light incident direction of the 2nd light source intersect, so can separate the 1st light in part and the 2nd light in part.Thus, can by between the 1st light in part and the 2nd light in part, groove is set, suppress near the high light of light source and leak to other irradiation zone.In addition, although ideal be to run through light guide sheet to be processed to form this groove, may not run through, shaded effect is also arranged in situation about not running through.
And, the invention is characterized in that in above-mentioned light guide sheet, above-mentioned polychrome is formed with above-mentioned polychrome with the irradiation zone compares the larger irradiation pattern of diffusivity with the irradiation pattern beyond the irradiation zone.
According to this structure, owing to formed the large irradiation pattern of diffusivity, so for example during with irradiation area illumination colored light, at the strong diffusion in irradiation zone colored light, thereby can alleviate other irradiation zone light leak that illuminates to white light at polychrome.Thereby, can be suppressed at the colour mixture between the adjacent irradiation zone.
And, the invention is characterized in, in above-mentioned light guide sheet, the 2nd adjacent with above-mentioned the 1st irradiation zone in the middle of above-mentioned a plurality of irradiations zone irradiation zone has the 3rd light in part, and the 3rd light in part is configured to make from the incident direction of the light of the 3rd light source above-mentioned the 1st light in part towards above-mentioned the 1st irradiation zone.
And, the light guide sheet that other light guide sheet of the present invention is emitted for the light that will import the irradiation zone from the light of light source and will import in above-mentioned irradiation zone, it is characterized in that, be divided into a plurality of irradiations zone by groove, and in the middle of above-mentioned a plurality of irradiations zone, had the 1st light in part by the 1st irradiation zone of light guide sheet end face and groove division, the 1st light in part is configured to incident direction from the light of the 1st light source towards this light guide sheet end face, have the 3rd light in part in abutting connection with the 2nd irradiation zone in above-mentioned the 1st irradiation zone in the middle of above-mentioned a plurality of irradiations zone, the 3rd light in part is configured to from the incident direction of the light of the 3rd light source above-mentioned the 1st light in part towards above-mentioned the 1st irradiation zone.
According to these structures, owing to the light of injecting the 2nd irradiation zone from the 3rd light in part is injected the back side shading of the 1st light source of light to the 1st light in part, so can alleviate the zone light leak from the 2nd irradiation zone to the 1st irradiation.
And, the invention is characterized in, in above-mentioned light guide sheet, between above-mentioned a plurality of irradiations zone, paste the adhesive tape across above-mentioned groove.
According to this structure, can reinforce the light guide sheet intensity that causes because of a plurality of grooves by adhesive tape and descend.
Also have, the sheet of contact-carrying spring of the present invention is characterised in that to possess above-mentioned light guide sheet and retention tab, and this retention tab is laminated on the above-mentioned light guide sheet and corresponding to above-mentioned a plurality of irradiations zone and keeps a plurality of contact springs.
According to this structure, can suppress with low cost fabrication the sheet of the contact-carrying spring of light leak between the irradiation zone of light guide sheet.
And switching device of the present invention is characterised in that to possess sheet and the substrate of above-mentioned contact-carrying spring, and this substrate is provided with a plurality of fixed contacts and a plurality of light source that above-mentioned a plurality of contact spring separates or contacts.
According to this structure, can suppress with low cost fabrication the switching device of the interregional light leak of irradiation of light guide sheet.
And the invention is characterized in that in above-mentioned switching device, control makes the brightness of above-mentioned a plurality of light-emitting zones even to the current value of above-mentioned a plurality of light sources.
According to this structure, make the brightness in a plurality of irradiations zone even, thereby can make the aberration between the irradiation zone that irradiation zone that colourama illuminates and white light illuminate remarkable.
According to the present invention, can be when illuminating separately a plurality of irradiations zone of light guide sheet, do not strengthen cost and alleviate interregional light leak.
Description of drawings
Fig. 1 is the top view of switching device for the figure of the embodiment of expression light guide sheet involved in the present invention.
Fig. 2 is the cutaway view along the A-A line of switching device shown in Figure 1 for the figure of the embodiment of expression light guide sheet involved in the present invention.
Fig. 3 is the phantom of switching device for the figure of the embodiment of expression light guide sheet involved in the present invention.
Fig. 4 is the key diagram of light source cell configuration structure for the figure of the embodiment of expression light guide sheet involved in the present invention.
Fig. 5 is the part enlarged drawing of Fig. 4 for the figure of the embodiment of expression light guide sheet involved in the present invention.
Fig. 6 is the figure of the embodiment of expression light guide sheet involved in the present invention, the key diagram of the irradiation groove that forms for the irradiation zone in light guide sheet.
Reference numeral
1 switching device, 2 circuit boards, the sheet of 3 contact-carrying springs, 5R
1Light source cell (the 1st light source), 5W
1Light source cell, 5R
2Light source cell (the 2nd light source), 5W
2Light source cell, 5R
3Light source cell (the 1st light source), 5W
3Light source cell, 5R
4Light source cell (the 1st light source), 5W
4Light source cell, 6 fixed contacts, 11 retention tabs, 12 contact springs, 13 light guide sheet, 14 two-sided tapes, 16A
1Polychrome irradiation zone (the 1st irradiation zone), 16A
2Polychrome irradiation zone (the 1st irradiation zone), 16A
3Polychrome irradiation zone (the 1st irradiation zone), 16A
4Polychrome irradiation zone (the 2nd irradiation zone), 16B white irradiation zone, 17 irradiation grooves, 18 operated keys, 19 key mat parts, 31 grooves, 32,33 adhesive tapes, 35-38 light guide sheet end face, 41,43,45 the 1st light in part, 42,44,46 the 2nd light in part, 48 the 3rd light in part
The specific embodiment
Below, describe with reference to the accompanying drawings the specific embodiment of the present invention in detail.In addition, switching device of the present invention mainly is installed on the various electronic equipments such as portable phone, remote controller, stereo set and electron camera, has the function of input operation part.The total of switching device at first is described with reference to Fig. 1.Fig. 1 is the top view of the involved switching device of embodiments of the present invention.Fig. 2 is the cutaway view along the A-A line of switching device shown in Figure 1.In addition, for convenience of explanation, omission has represented the key mat parts in Fig. 1.
Represent that such as Fig. 1 and Fig. 2 the involved switching device 1 of present embodiment is assembled in the portable phone enclosure that does not have expression among the figure, has a plurality of light source cell 5R are set
1-4, 5W
1-9Circuit board 2 with a plurality of fixed contacts 6.Post the sheet 3 of contact-carrying spring at the upper surface of circuit board 2.The sheet 3 of contact-carrying spring is made of retention tab 11 and light guide sheet 13, and this retention tab 11 keeps being configured in a plurality of contact springs 12 on each fixed contact 6, and this light guide sheet 13 is secured at the upper surface of retention tab 11 by two-sided tape 14.
The position corresponding to each contact spring 12 at light guide sheet 13 upper surfaces forms a plurality of irradiations zone 16.16 form the irradiation pattern by tiny irradiation groove 17 (with reference to Fig. 6) in each irradiation zone, and will inject the light diffusion in the light guide sheet 13 or reflex to the top and emit from light source cell 5.In addition, irradiation groove 17 has different depth according to the formation position in each irradiation zone 16, in detail with aftermentioned.
Simultaneously, on the shell of portable phone, be provided with the guidance panel that does not have expression among the figure with circuit board 2 oppositely, be provided with the key mat parts 19 that disposed operated key 18 with each fixed contact 6 at this guidance panel oppositely.Operated key 18 has the literal section at upper surface expression key class.Literal section has light transmission, and the light that spreads in irradiation zone 16 illuminates literal section from enclosure.
It is the tabular of essentially rectangular that circuit board 2 is formed when overlooking by the insulating properties material, forms the conductive pattern that does not have expression among a plurality of fixed contacts 6 and the figure at upper surface.A plurality of fixed contacts 6 are made of the peripheral fixed contact 21 of ring-type and the toroidal central authorities fixed contact 22 that is positioned at peripheral fixed contact 21 central authorities respectively, and peripheral fixed contact 21 and central fixed contact 22 connect on the control part that not have in the drawings to represent by conductive pattern.
A plurality of light source cell 5R
1-4, 5W
1-9Consisted of by light emitting diode (LED) 24, be configured to a end face with light guide sheet 13 only across some gaps.At this moment, light source cell 5R
1-4Have and operated key 18 is lit a lamp be the red LED of redness, light source cell 5W
1-9Have and operated key 18 is lit a lamp be the White LED of white. Light source cell 5R
1-4, 5W
1-9The light that penetrates in light guide sheet 13 interior propagation, is imported into irradiation zone 16 with radiation direction.
Each contact spring 12 is such as forming dome-shaped by metallic plate with electric conductivity etc.Each contact spring 12 with the bulging side of being directed upwardly be equipped on the peripheral fixed contact 21, when reversing because of pressing operation, can contact central fixed contact 22.Therefore, when contact spring 12 was inverted because of pressing operation, central fixed contact 22 and peripheral fixed contact 21 were by contact spring 12 conductings.
It is the shape of rectangle when overlooking that retention tab 11 forms, and consists of by surface patch 26 and separate sheet 27 are stacked.It is the shape of rectangle that surface patch 26 is formed when overlooking by insulation films such as polyester.And, coat bonding agent at the whole lower surface of surface patch 26, by this bonding agent holding contact spring 12 and separate sheet 27 is become one.
It is the shape of rectangle that separate sheet 27 is formed on when overlooking by insulation films such as polyester, and forms the storage part of a plurality of contact springs 12 in the position corresponding with a plurality of fixed contact 6.Whole lower surface in separate sheet 27 is coated bonding agent, and makes retention tab 11 be secured at the upper surface of circuit board 2 with the state that keeps a plurality of contact springs 12 by this bonding agent.In addition, in cutaway view shown in Figure 2, represented the part that the storage part of 3 contact springs 12 is connected by the air communication road.
When forming and overlook, the transparent membrane that light guide sheet 13 has a light transmission take polycarbonate resin etc. is the shape of rectangle.And, form a plurality of grooves 31 of dividing specific irradiation zone 16 in light guide sheet 13.So-called " specific irradiation zone 16 " refers to the polychrome irradiation zone 16A that illuminated by white light and red light
1-4That is, light guide sheet 13 alleviates red light from polychrome irradiation zone 16A by groove 31
1-4To other the light leak in irradiation zone.
Then, with reference near the irradiation zone of figure 3 detailed description switching devices and near the groove.Fig. 3 is the phantom of the involved switching device of embodiments of the present invention, (a) near the expression irradiation zone, (b) near the expression groove.
Shown in Fig. 3 (a), the centre of luminescence of the light emitting diode 24 in the light source cell 5 and the thickness direction center of light guide sheet 13 aim the place mutually.The light of light emitting diode 24 emissions in the light source cell 5 incides in the light guide sheet 13 and propagates in the interreflection of the top and bottom of light guide sheet 13.At the interior light of having propagated of light guide sheet 13, be reflected and spread being formed at the locational irradiation zone 16 corresponding with the operated key 18 of light guide sheet 13, then penetrate towards operated key 18.
And light guide sheet 13 forms with same transparent film, and the light that will penetrate from light source cell 5 to radiation direction is the direction propagation of radiation direction when overlooking.According to this structure, light guide sheet 13 propagates into irradiation zone 16 with the light that light source cell 5 penetrates, and illuminates equably the literal section of operated key 18 from the inboard.Do not affect the thickness of operation feeling degree when in addition, light guide sheet 13 has pressing operation operated key 18.
In the switching device 1 with said structure, when pressing operation key 18, contact spring 12 is inverted, and makes central fixed contact 22 and peripheral fixed contact 21 by contact spring 12 conductings.In addition, in the present embodiment, adopted the structure that forms each irradiation zone 16 by the tiny irradiation groove 17 of light guide sheet 13 upper surfaces, but not only be subject to this structure.So long as the light in light guide sheet 13 interior propagation is got final product towards the structure that operated key 18 penetrates, for example, irradiation zone 16 can have the structure by the tiny irradiation groove formation of light guide sheet 13 lower surfaces, also can have the structure that consists of by the white point printing.
And shown in Fig. 3 (b), on the part of light guide sheet 13, light guide sheet 13 is cut apart by a plurality of grooves 31.In order to reinforce because of the descended part of intensity of a plurality of grooves 31, paste adhesive tape 32,33 across groove 31 in the upper and lower surface of light guide sheet 13.Adhesive tape 32 is black belt, reinforces light guide sheet 13 from upper surface side; Adhesive tape 33 is the black double-sided adhesive tape, is attached on the upper surface of retention tab 11 and reinforces light guide sheet 13 from lower face side. Adhesive tape 32,33 can not be black also, so long as can shading or the adhesive tape of reflection just can.
Near this groove 31, consume light quantity because passing irradiation zone 16, the light quantity that therefore propagates into a plurality of grooves 31 is reduced.So, at the light of light guide sheet 13 interior propagation by a plurality of grooves 31 and adhesive tape 32,33 shadings, thereby reduce significantly light leak to adjacent irradiation zone 16.
Then, illustrate that with reference to Fig. 4 and Fig. 5 characteristics of the present invention partly are the configuration structure of light source cell.Fig. 4 is the key diagram of the light source cell configuration structure of the related switching device of embodiments of the present invention.(a) configuration structure of expression light source cell, the current value that (b) represents each LED is set.Fig. 5 is the part enlarged drawing of Fig. 4.
Shown in Fig. 4 (a), the irradiation zone 16 of light guide sheet 13 is divided into polychrome irradiation zone 16A red or that white illuminates
1-4With the white irradiation zone 16B that illuminates with white.And, at a plurality of light source cell 5R of light guide sheet 13 configurations
1-4, 5W
1-9 Polychrome irradiation zone 16A
1Be divided into quadrangle form by light guide sheet end face 35 and a plurality of groove 31 that is positioned at short side direction one end, and by light source cell 5R
3, 5W
4Illuminate.Polychrome irradiation zone 16A
2Be divided by the light guide sheet end face 35 that is positioned at short side direction one end and the light guide sheet end face 36 that is positioned at long side direction one end and a plurality of groove 31, and by light source cell 5R
4, 5W
4Illuminate.
At the zone of the polychrome irradiation shown in Fig. 5 (a) 16A
1, a bight configuration light source cell 5R in the zoning
3, another bight configuration light source cell 5W in the zoning
3 Light source cell 5R
3The ejaculation direction towards light guide sheet end face 35, be adjusted to oblique incidence polychrome irradiation zone 16A
1 Light source cell 5W
3The ejaculation direction towards light guide sheet end face 35, be adjusted to and light source cell 5R
3The ejaculation direction intersect.And, at polychrome irradiation zone 16A
1, with light source cell 5R
3, 5W
3Be provided with accordingly the 1st, the 2nd light in part 41,42.1st, the 2nd light in part 41,42 is formed light source cell 5R
3, 5W
3The emission light inject direction towards light guide sheet end face 35.
According to this structure, because light source cell 5R
3, 5W
3The light that penetrates is directive light guide sheet end face 35 in the situation of not passing white irradiation zone 16B, so alleviated to the light leak of white irradiation zone 16B.Therefore, can suppress because of light source cell 5R
3The red light light leak and colour mixture occurs at white irradiation zone 16B.As mentioned above, because by light source cell 5R
3, 5W
3Configuration structure alleviate light leak to other irradiation zone, so need to light screening material be set at groove 31, and can cheaply make switching device 1.
And, at polychrome irradiation zone 16A
4The 4th light in part 49, although light source cell 5W
2The light of launching inject direction towards white irradiation zone 16B, so but because be that its light leak of white light is less on the impact that white illumination area territory 16B brings.As mentioned above, by light source cell 5R
2, 5W
2Configuration structure, alleviate the light leak to other irradiation zone, therefore need to light screening material be set at groove 31, thereby can cheaply make switching device 1.
And, at light source cell 5R
1-4, 5W
1-4Around also form a plurality of grooves 31.Suppress light source cell 5R by this groove 31
1-4, 5W
1-4Near high light leaks to other irradiation zone 16.In the above-described embodiment, polychrome irradiation zone 16A
1-3Play the function in the 1st irradiation zone, and polychrome irradiation zone 16A
4Play the function in the 2nd irradiation zone.
Shown in Fig. 4 (b), in switching device 1, each light source cell 5R
1-4, 5W
1-9Current setting value be set in each irradiation zone 16 and can access uniform brightness.At this moment, light source cell 5R
1-4Owing to penetrate the low red light of brightness, so that its current value is set to is higher (for example, 10.0[mA]).On the other hand, light source cell 5W
1-9Be set to polychrome irradiation zone A
1-4With the different current values of using with white irradiation zone B.Polychrome irradiation zone A
1-4Use light source cell 5W
1-4Owing to illuminate single irradiation zone, so that current value is set to is lower (for example, 3.0[mA]).White irradiation zone B light source cell 5W
5-9Owing to illuminate a plurality of irradiations zone, so that current value is set to is higher (for example, 7.5[mA]).
As mentioned above, switching device 1 is according to the difference of the irradiation number of regions of the difference of glow color or irradiation, is set to have on the whole uniform brightness.According to this structure, can accomplish to make with redness light-struck irradiation zone and remarkable with the color distortion between the light-struck irradiation of the white zone.And, at switching device 1 formation control circuit, thereby avoid each light source cell 5R
1-4, 5W
1-4Shine simultaneously polychrome irradiation zone A
1-4
At last, the irradiation groove that forms in the irradiation zone with reference to Fig. 6 explanation.Fig. 6 is the key diagram at the irradiation groove of the irradiation zone formation of the involved light guide sheet of embodiments of the present invention, (a) the white irradiation of expression zone, (b) expression polychrome irradiation zone.
Shown in Fig. 6 (a), in the 16B of white irradiation zone, along with away from light source cell 5W, irradiation groove 17 also deepens.This be because, in the position close to light source cell 5W because light quantity is many, so also can obtain sufficient brightness even relatively shallowly form irradiation groove 17, but in the position away from light source cell 5W, so can not obtain sufficient brightness because light quantity is few.Therefore, in the position away from light source cell 5W, come strongly diffused light by deepening irradiation groove 17, thereby guarantee the uniformity of brightness on white irradiation zone 16B.
Shown in Fig. 6 (b), at polychrome irradiation zone 16A, form deeper irradiation groove 17.It is also dark that the degree of depth of this irradiation groove 17 is formed the degree of depth of the locational irradiation groove 17 far away than the light source cell 5W of the white irradiation of distance zone 16B.This is because alleviated light leak to other adjacent irradiation zone thereby the irradiation groove 17 that forms deeper spread the red light of injecting the regional 16A of polychrome irradiation strongly.According to this structure, can suppress the light leak of the red light of launching because of light source cell 5R in the colour mixture of white irradiation zone 16B.And the light source cell 5 of polychrome irradiation zone 16A can obtain by less light quantity sufficient brightness, therefore compares with the light source cell 5 of white irradiation zone 16B, can set current value (with reference to Fig. 4 (b)) than the lowland.
As mentioned above, according to the involved switching device 1 of present embodiment, owing to make in polychrome irradiation zone 16 from the light of the 1st light in part incident and do not pass other irradiation zone and towards the light guide sheet end face, so can alleviate light leak from from polychrome irradiation zone 16A to white irradiation zone 16B.Thereby, alleviate the light leak of the red light that polychrome irradiation zone 16A launches, be suppressed at the colour mixture of white irradiation zone 16B.As mentioned above, can alleviate light leak to other irradiation zone owing to needn't light screening material be set at groove 31, cost can not increase yet so need not to increase manufacturing process yet.
In addition, in the above-described embodiment, adopt the structure that forms light guide sheet with polycarbonate resin, but not only be subject to this structure.Light guide sheet so long as thin slice that can leaded light just can, for example, also can adopt the structure that forms light guide sheet with urethane resin.
And, in the above-described embodiment, be illustrated with the light source of light emitting diode as light source cell, but not only be subject to this structure.As long as have the light quantity in each the irradiation zone that can evenly illuminate light guide sheet, use any light source can.
And, in light guide sheet that the 1st irradiation zone is regional as the polychrome irradiation in the above-described embodiment, but not only be subject to this structure.The 1st irradiation zone so long as the zone of being divided by light guide sheet end face and groove just can, for example, the irradiation zone of being only had the single light source of red light to illuminate is also passable.
Also have, in the above-described embodiment, the structure that has adopted polychrome irradiation zone to be illuminated by red light and white light, but not only be subject to this structure.Polychrome irradiation zone so long as the zone of being illuminated by different glow colors just can, also passable by the zone that 2 kinds of colored lights illuminate.And polychrome irradiation zone has more than and is subject to the structure that 2 kinds of glow colors illuminate, and adopts the structure that is illuminated by glow color more than 3 kinds also passable.
And, in the above-described embodiment, adopted the diffusivity of irradiation pattern in polychrome irradiation zone than the large structure of irradiation pattern beyond the polychrome irradiation zone, be subject to this structure but have more than.The irradiation pattern in polychrome irradiation zone can fully suppress colored light and just can to the light diffusing of the degree of other irradiation zone light leak as long as have.More specifically be that when forming the irradiation pattern with the irradiation groove, the degree of depth of irradiation groove is so long as can fully suppress colored light and just can to the degree of other irradiation zone light leak.Also have, when forming the irradiation pattern with the white point printing, can fully suppress colored light to the dot density of the degree of other irradiation zone light leak as long as the dot density in polychrome irradiation zone has.
In the above-described embodiment, light guide sheet has adopted in upper and lower surface with the structure across the mode Continuous pressing device for stereo-pattern of groove, but not only is subject to this structure.Be not a problem so long as the intensity that troughed belt comes descends, light guide sheet only adopts in the structure of the one-sided Continuous pressing device for stereo-pattern of upper and lower surface also passable, adopts the structure of Continuous pressing device for stereo-pattern not also passable.And adhesive tape preferably shading is used or reflection usefulness, but also not only is subject to this.
And, in the above-described embodiment, for example understand the switching device by retention tab holding contact spring on circuit board, but not only be subject to this structure.So long as use the switching device of light guide sheet involved in the present invention, any structure can.
And this disclosed embodiment is in all respects only for illustrating, and is not subject to this embodiment.Scope of the present invention is not the explanation of above-mentioned embodiment, but is expressed by claims, means to comprise and the equal implication of claims and the whole changes on the claims.
As described above, the present invention has when illuminating separately a plurality of irradiations zone and can not strengthen into the effect that this locality alleviates interregional light leak, and is especially useful to the sheet and the switching device that are assembled in light guide sheet in the miniaturized electronics such as portable phone, contact-carrying spring.
Claims (9)
1. light guide sheet will import the irradiation zone and emit the light of importing in above-mentioned irradiation zone from the light of light source, it is characterized in that,
Be divided into a plurality of irradiations zone by groove, the 1st irradiation zone of being divided by light guide sheet end face and groove in the middle of above-mentioned a plurality of irradiations zone has the 1st light in part, the 1st light in part be configured to make from the light of the 1st light source enter light direction towards this light guide sheet end face,
Above-mentioned the 1st irradiation zone is regional with irradiation for the polychrome with the 2nd light in part, and the 2nd light in part is from the glow color 2nd light source incident light different from above-mentioned the 1st light source,
Above-mentioned the 2nd light in part is configured to, and makes incident direction from the light of above-mentioned the 2nd light source towards the light guide sheet end face of dividing above-mentioned the 1st irradiation zone, and intersects with the incident direction of the light of above-mentioned the 1st light source emission,
Above-mentioned polychrome is formed with above-mentioned polychrome with the irradiation zone compares the larger irradiation pattern of diffusivity with the irradiation pattern beyond the irradiation zone.
2. light guide sheet according to claim 1 is characterized in that,
The 2nd adjacent with above-mentioned the 1st irradiation zone in the middle of above-mentioned a plurality of irradiations zone irradiation zone has the 3rd light in part, and the 3rd light in part is configured to make from the incident direction of the light of the 3rd light source above-mentioned the 1st light in part towards above-mentioned the 1st irradiation zone.
3. light guide sheet according to claim 1 and 2 is characterized in that,
Between above-mentioned a plurality of irradiations zone, paste the adhesive tape across above-mentioned groove.
4. the sheet of a contact-carrying spring is characterized in that,
Possess claim 1 or 2 described light guide sheet and retention tabs, this retention tab is layered on the above-mentioned light guide sheet, and keeps a plurality of contact springs corresponding to above-mentioned a plurality of irradiations zone.
5. the sheet of a contact-carrying spring is characterized in that,
Possess light guide sheet claimed in claim 3 and retention tab, this retention tab is layered on the above-mentioned light guide sheet, and keeps a plurality of contact springs corresponding to above-mentioned a plurality of irradiations zone.
6. a switching device is characterized in that,
The sheet and the substrate that possess contact-carrying spring claimed in claim 4, this substrate are provided with a plurality of fixed contacts and a plurality of light source that above-mentioned a plurality of contact spring separates or contacts.
7. switching device according to claim 6 is characterized in that,
Control makes the brightness of a plurality of light-emitting zones even to the current value of above-mentioned a plurality of light sources.
8. a switching device is characterized in that,
The sheet and the substrate that possess contact-carrying spring claimed in claim 5, this substrate are provided with a plurality of fixed contacts and a plurality of light source that above-mentioned a plurality of contact spring separates or contacts.
9. switching device according to claim 8 is characterized in that,
Control makes the brightness of a plurality of light-emitting zones even to the current value of above-mentioned a plurality of light sources.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP041743/2010 | 2010-02-26 | ||
| JP2010041743A JP5036835B2 (en) | 2010-02-26 | 2010-02-26 | Light guide sheet, sheet with contact spring and switch device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102192479A CN102192479A (en) | 2011-09-21 |
| CN102192479B true CN102192479B (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100380844A Active CN102192479B (en) | 2010-02-26 | 2011-02-15 | Light guide sheet, sheet with contact spring and switching device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5036835B2 (en) |
| KR (1) | KR101267166B1 (en) |
| CN (1) | CN102192479B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013161587A (en) * | 2012-02-02 | 2013-08-19 | Alps Electric Co Ltd | Membrane switch unit and keyboard device using membrane switch unit |
| JP6319789B2 (en) * | 2014-02-27 | 2018-05-09 | アルプス電気株式会社 | Light guide and illumination device using light guide |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007248981A (en) * | 2006-03-17 | 2007-09-27 | Asuko:Kk | False full color display device and road sign |
| JP2008235021A (en) * | 2007-03-20 | 2008-10-02 | Sumitomo Electric Printed Circuit Inc | Input module and portable equipment |
| JP2009140871A (en) * | 2007-12-10 | 2009-06-25 | Alps Electric Co Ltd | Illumination member for switch and switch device having illumination member for switch |
| JP2009117233A (en) * | 2007-11-08 | 2009-05-28 | Alps Electric Co Ltd | Illuminating member for switch, and switch unit having illuminating member for switch |
| JP2009146652A (en) * | 2007-12-12 | 2009-07-02 | Citizen Electronics Co Ltd | Lighting device for operation key and electronic device |
| JP2009187855A (en) * | 2008-02-08 | 2009-08-20 | Shin Etsu Polymer Co Ltd | Illuminating structure of mobile phone |
-
2010
- 2010-02-26 JP JP2010041743A patent/JP5036835B2/en active Active
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2011
- 2011-02-15 CN CN2011100380844A patent/CN102192479B/en active Active
- 2011-02-23 KR KR1020110016046A patent/KR101267166B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| KR101267166B1 (en) | 2013-05-24 |
| CN102192479A (en) | 2011-09-21 |
| JP2011181211A (en) | 2011-09-15 |
| JP5036835B2 (en) | 2012-09-26 |
| KR20110098647A (en) | 2011-09-01 |
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Address after: Tokyo, Japan, Japan Patentee after: Alpine Alpine Company Address before: Tokyo, Japan, Japan Patentee before: Alps Electric Co., Ltd. |