CN101145457A - Light-emitting keyboard with optical waveguide film - Google Patents
Light-emitting keyboard with optical waveguide film Download PDFInfo
- Publication number
- CN101145457A CN101145457A CNA2007101453475A CN200710145347A CN101145457A CN 101145457 A CN101145457 A CN 101145457A CN A2007101453475 A CNA2007101453475 A CN A2007101453475A CN 200710145347 A CN200710145347 A CN 200710145347A CN 101145457 A CN101145457 A CN 101145457A
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- China
- Prior art keywords
- mentioned
- waveguide film
- optical waveguide
- light
- dot pattern
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
-
- 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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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Push-Button Switches (AREA)
Abstract
The present invention relates to a luminescence keyboard with light waveguide film, which can conduct light through thin light waveguide film to form surface luminescence, so as to implement thin keyboard; to reduce the damage to light waveguide film by means of forming upper prominency on the back layer to replace traditional lower prominency, so as to improve reliability; to improve light-emitting efficiency by means of forming light-emitting graph on the prescribed area on the back layer and the upper prominency upper surface; to implement uniform surface luminescence and improve luminescence brightness of special area by means of forming light spot graph on the light waveguide film; to improve brightness and change light wavelength as well as to glow with various colors by means of setting fluorophors within the light spot graph. The present invention also provides a light spot graph preparing method with high efficiency and high finished product up-to-standard rate.
Description
Technical field
The present invention relates to the optical waveguide film that a kind of illuminated keyboard and illuminated keyboard are used.
Background technology
Fig. 1 is the stereogram of common wireless terminal.
As shown in Figure 1, wireless terminals such as mobile phone formation comprises, be used to show the liquid crystal panel 120 of various use information such as transmission, accepting state, and have the keypad portion (Keypanel) 110 that the button patchhole is used to insert the button 130 of the keyboard (Keypad) that produces signal and carry out various functions.
Have a plurality of buttons 130 on the keyboard, be formed with printing surface on the button 130 and be printed on numeral or literal etc., button 130 outstanding keypad portion 110 outsides that are formed on mobile phone.The user sees numeral or the literal on the printing surface and presses required button 130.In order to confirm printing surface at night, be provided with the light source that constitutes by light-emitting component in the bottom outside of button 130, light from light source is arranged as backlight, numeral or the literal of user on just can recognition button 130.
But, being used in the illuminated keyboard of existing full run-down type light-emitting diode (TopviewLED) mode of illuminated keyboard light source, the LED characteristic causes keyboard thicker.In addition, the position difference that disposes according to LED can cause non-uniform light, has brought many difficulties to keyboard Designing.
For the limitation on the ultrathin design of breaking existing LED illuminated keyboard, developed the thin-type light emitting keyboard of use EL (Electro Luminescence: electricity causes) illumination mode (being designated hereinafter simply as the EL mode).
Fig. 2 is the cutaway view of existing EL mode illuminated keyboard, described EL mode illuminated keyboard is made of keycap 210, EL metal hemisphere film (Metal dome sheet) 220, printed circuit board (PCB) 230, above-mentioned EL metal hemisphere film 220 is made of EL plate 221, metal hemisphere 223 and basement membrane 222, thereby has realized ultra-thin low power consuming.
The metal dome-type keyboard of above-mentioned EL mode, when the user pushed keycap 210, the projection 211 that is positioned at keycap 210 downsides was pressed, and the fixed contact 231 of metal hemisphere 223 and printed circuit board (PCB) 230 is contacted, thereby connected switch.
The illuminated keyboard of this EL mode can provide well-proportioned luminous, therefore but be easy to generate noise and misoperation take place.In addition, the EL mode needs inverter, inductor etc. to exchange components and parts, thus need certain installing space, and costly.
Therefore, be badly in need of developing a kind of illuminated keyboard that solves above-mentioned existing issue.
Summary of the invention
The present invention is intended to address the above problem, and its purpose is, and provide a kind of use lateral emitting type (Sideview) LED mode to replace full run-down type, and use slim optical waveguide film to carry out leaded light, thus the luminous thin-type light emitting keyboard of realization face.
Another object of the present invention is to, form a upper ledge by layer overleaf and replace lower protrusion,, improve reliability to avoid bringing damage to optical waveguide film, layer and the regulation above upper ledge zone forms the bright dipping figure overleaf in addition, thereby provides light to emit the high illuminated keyboard of efficient.
Another object of the present invention is to, luminous by on optical waveguide film, forming dot pattern (DOTpattern) to reach uniform face, and improve the brightness of specific region.
Another object of the present invention is to, comprise fluorophor,, change emission wavelength, and can carry out luminous with shades of colour as required to improve brightness by making in the above-mentioned dot pattern.
Another object of the present invention is to, a kind of method of more efficiently, the above-mentioned dot pattern of formation that efficient is high is provided.
In order to achieve the above object, illuminated keyboard of the present invention comprises: the keypad portion that is formed with a plurality of buttons; Back layer is positioned at above-mentioned keypad portion bottom, and has a plurality of upper ledge of corresponding all or part of above-mentioned button; Optical waveguide film is formed on the bottom of above-mentioned back layer, and guiding is from the light of light source and to carry out face luminous, and wherein the regulation zone of the upper surface of above-mentioned optical waveguide film or lower surface is formed with the dot pattern that is used to improve brightness.
In addition, illuminated keyboard of the present invention is characterized in that, is formed with the bright dipping figure on the upper surface of the regulation of above-mentioned back layer upper surface zone and upper ledge.
In addition, illuminated keyboard of the present invention is characterized in that, on part or all of above-mentioned dot pattern, includes the fluorophor that is used to improve brightness.
In addition, illuminated keyboard of the present invention is characterized in that, on part or all of above-mentioned dot pattern, includes the fluorophor of optical wavelength being changed into the long wavelength.
In addition, illuminated keyboard of the present invention is characterized in that, above-mentioned fluorophor uses at least a in YAG series, TAG series, the silicate series fluorophor.
In addition, illuminated keyboard of the present invention is characterized in that, the light of above-mentioned optical waveguide film is injected and is formed with warpage figure (Pattern) on the face.
In addition, illuminated keyboard of the present invention is characterized in that, above-mentioned dot pattern is to use on the central part that is combined in the retractility silk screen, and is provided with the metal mask (Metal mask) with the corresponding hole of dot pattern, forms by mode of printing.
In addition, illuminated keyboard of the present invention is characterized in that, also comprises the printed circuit board (PCB) that is positioned at above-mentioned optical waveguide film bottom and has dome-type switch (Dome switch).
The optical waveguide film that the present invention also provides a kind of illuminated keyboard to use is characterized in that, described optical waveguide film is to the light channeling conduct from light source, and is luminous with formation face; Be formed with the dot pattern that is used to improve brightness on the regulation zone at the upper surface of this optical waveguide film or the back side; Above-mentioned dot pattern is to use on the central part that is combined in the retractility silk screen and is provided with metal mask (Metal mask) with the corresponding hole of dot pattern, forms by mode of printing.
In addition, the optical waveguide film that illuminated keyboard of the present invention is used is characterized in that, comprises on the part or all of above-mentioned dot pattern optical wavelength to be changed into the long wavelength and improve the fluorophor of brightness.
The present invention's the illuminated keyboard with optical waveguide film can carry out leaded light by slim optical waveguide film, and formation face is luminous, thereby can realize the slimming of keyboard.
Form a upper ledge by layer overleaf and replace traditional lower protrusion, can reduce the damage that brings optical waveguide film, thereby improve reliability.
By the layer and the regulation of upper ledge upper surface zone formation bright dipping figure overleaf, can improve light extraction efficiency.
By forming dot pattern, realize that uniform face is luminous, and can improve the luminosity of specific region at optical waveguide film.
By on above-mentioned dot pattern, comprising fluorophor, brightness can be improved, and optical wavelength can be changed, also can be as required, luminous with shades of colour.
The dot pattern manufacture method of efficient high product qualified rate also can be provided according to the present invention.
Description of drawings
Fig. 1 is the stereogram of existing wireless terminal;
Fig. 2 is existing cutaway view with illuminated keyboard of EL device;
Fig. 3 is the cutaway view of the illuminated keyboard of one of the present invention embodiment;
Fig. 4 is among one of the present invention embodiment, employed mask schematic diagram in the method for formation dot pattern on optical waveguide film;
Fig. 5 is among one of the present invention embodiment, the schematic diagram of optical waveguide film;
Fig. 6 is the cutaway view of the illuminated keyboard among another embodiment of the present invention;
Fig. 7 is the cutaway view of the illuminated keyboard among another embodiment of the present invention.
Reference numeral:
10: keypad portion 20: back layer
21: upper ledge 22: the bright dipping figure
30: optical waveguide film 31: dot pattern
32: warpage figure 40: printed circuit board (PCB)
41: metal hemisphere 42: contact
50: light source 60: silk screen
61: metal mask 62: hole
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described in detail.
Fig. 3 is the cutaway view of the illuminated keyboard with optical waveguide film of one embodiment of the invention.As shown in the figure, described illuminated keyboard, its feature comprises: the keypad portion 10 that is formed with a plurality of buttons; Back layer 20 is positioned at above-mentioned keypad portion 10 bottoms, and has a plurality of upper ledge 21 of corresponding all or part of above-mentioned button; Optical waveguide film 30 is formed on the bottom of above-mentioned back layer 20, and guiding is from the light of light source 50 and to carry out face luminous, and the regulation zone at the upper surface of wherein above-mentioned optical waveguide film 30 or the back side is formed with the dot pattern 31 that is used to improve brightness.Above-mentioned optical waveguide film can be provided with printed circuit board (PCB) 40 30 times, forms the dome-type switch with metal hemisphere 41 and contact 42 on the described printed circuit board (PCB) 40.Above-mentioned light source 50 is not had special restriction, preferably use LED, most preferably blue led.
The present invention's illuminated keyboard uses lateral emitting type light source to solve the thickness problem that the full run-down type light source is had, and uses the optical waveguide film that is formed with the dot pattern that improves brightness, can form the high brightness of the luminous and/or specific region of uniform face.
Above-mentioned keypad portion 10 can be used the keypad portion of illuminated keyboard, and shape and the material to keypad portion do not limit in the present invention.That is, each button of keypad portion can form protruding type, also can form plate and represents each button with the corresponding digital literal.Because of these belong to prior art, state so no longer apply.
The transparent plate that being preferably of above-mentioned keypad portion 10, button-shape become one.Above-mentioned button can show that coloured evaporation layer colouring can be used in the zone beyond the button by the ink layer of keypad portion below.In addition, above-mentioned keypad portion upper surface can form the protective finish that prevents scratch.
Have a plurality of upper ledge 21 on the above-mentioned back layer 20, though unrestricted, be preferably formed and be one.Above-mentioned back layer preferably uses elastic restoring force outstanding, as materials such as silica gel.Back layer and upper ledge can be carried out moulding by shaping mould.
Above-mentioned upper ledge 21 is preferably formed on all or part of button relevant position of living in of keypad portion of illuminated keyboard, when user's pressing button, the respective upper projection is pressed, back layer zone corresponding to the upper ledge present position is bent, and is electrically connected thereby the switch portion such as dome-type switch that are positioned at the optical waveguide film bottom are formed.Above-mentioned back layer has elastic restoring force, so when user's finger leaves button, return to original position.
Form lower protrusion as bottom, repeatedly to the optical waveguide film pressurization, might cause the optical waveguide film damaged through lower protrusion in above-mentioned back layer.Therefore, form upper ledge by layer top overleaf, when guaranteeing the sense of touch of button, but dispersed light waveguide film pressure, thus avoid film impaired as much as possible.
Though above-mentioned optical waveguide film 30 is not had special restriction, but preferred Merlon, polyethylene terephthalate, the acrylic compounds film that use with excellent optical lens photosensitiveness, take all factors into consideration the factors such as sense of touch of slim, light guide efficiency and hemisphere film, its thickness is preferably 50～200 μ m.Above-mentioned optical waveguide film sticks on the above-mentioned back layer.For improving the preferred barrier coating coating of bonding force, for example, behind barrier coating coating on the optical waveguide film, inject silica gel in the shaping mould, when forming back layer, Overheating Treatment is bonded on the optical waveguide film.
Be formed with dot pattern 31 on the upper surface of above-mentioned optical waveguide film 30 or the back side.Increase the brightness of respective regions by forming above-mentioned dot pattern.Along with the distance between above-mentioned dot pattern and the light source increases, increase the density of dot pattern or the size of increase dot pattern, thereby it is luminous to obtain uniform face.In addition, the specific region, for example at button positions regional centralized dot pattern, then button area light is concentrated, and brightness is higher than other zones.Concerning illuminated keyboard, button area luminous very important is provided with dot pattern so preferably concentrate in button area.But the form of not getting rid of the uniform spot figure among the present invention.
Above-mentioned dot pattern preferably is made of hardening resin composition.Especially use to have excellent hardening resin composition, can reduce the damage of dot pattern.Curable resin can use known hardening resin composition, and preferred usability photopolymer resin also can comprise photoinitiator.For example, can use acrylic resin composition.That is, behind the regioselectivity ground of dot pattern coating curable resin, make its curing and make.
On part or all of above-mentioned dot pattern 31, preferably comprise the fluorophor that is used to improve brightness.Above-mentioned fluorophor preferably uses can be with the wavelength shift of light source as the long wavelength and improve the fluorophor of brightness.Content to fluorophor is not particularly limited, and preferably the dot pattern solid content to 100 weight portions uses 5 to 20 weight portions.
As long as fluorophor can satisfy above-mentioned condition, all can use, it is not limited.For example, can use Y as red-emitting phosphors
2O
2S:Eu, La
2O
2S:Eu, 3.5MgO0.5MgF
2GeO
2: Mn, (La, Mn, Sm)
2O
2SGa
2O
3Can use ZnS:Cu, Al, SrAl as green-emitting phosphor
2O
4: Eu, BAM:Eu, Mn; Can use YAG:Ce as yellow fluorophor; Can use BAM:Eu, Sr as blue emitting phophor
5(PO
4)
3Cl:Eu, ZnS:Ag, (Sr, Ca, Ba, Mg)
10(PO
4)
6Cl
2: Eu.These fluorophor of use also capable of being combined.Also can realize white by the above-mentioned fluorophor of combination.
In addition, can use as white phosphor, oxynitrides glass fluorophor (with reference to Japanese kokai publication hei 13-214162), or the silicon aluminum oxygen nitrogen polymer is the fluorophor (opening flat 15-124527 number with reference to Japanese kokai publication hei 15-336059 number, spy) of matrix, nitrogenous fluorophor such as silicon nitride class (opening flat 15-277746 number with reference to Japan's special permission communique 15-515655 number, spy).
Preferred use at least a in YAG series, TAG series, the silicate series.YAG series has Ce
3+Dope Y
3A
15O
12TAG series has Ce
3+Dope Tb
3A
15O
12Silicate series has Eu
2+Dope (SrBaCa)
2SiO
4Si:Al, B, P, Ge, Eu
2+Dope (SrBaMg)
2SiO
4O:F, Cl, N, S etc. preferred use wherein at least a.
As on above-mentioned dot pattern, the subregion is added the fluorophor with different emission wavelengths respectively, and the light of different wave length is sent in each zone, can realize the visual effect of having a distinctive style.
Fig. 4 is among one of the present invention embodiment, forms employed mask schematic diagram in the method for above-mentioned dot pattern 31; Fig. 5 is among one of the present invention embodiment, and the schematic diagram of optical waveguide film has shown the optical waveguide film that uses said method to make.
Above-mentioned dot pattern 31 can use several different methods to make, and it is not done qualification.Above-mentioned optical waveguide film is extremely thin, and the method for using pressure sintering to add the thermosetting figure might cause deformation of thin membrane, and it is lower to make qualification rate.In addition, common stencil printing also is not enough to form required dot pattern.Therefore, preferably use mask mode as shown in Figure 4 to form.That is, use a kind ofly to be combined on the silk screen central part with retractility and to be provided with metal mask with the corresponding hole of dot pattern, form by mode of printing.But, do not get rid of above-mentioned pressure sintering, stencil printing etc. in the present invention.
Above-mentioned mask comprises having the silk screen 60 of retractility, is combined in the central part of above-mentioned silk screen and is provided with metal mask 61 corresponding to the hole 62 of dot pattern.The method of machining hole has on above-mentioned metal mask, method for chemially etching, laser-induced thermal etching method etc.
When using above-mentioned mask to print, the retractility silk screen stretches when printing and is bonded on the above-mentioned optical waveguide film, and hardening resin composition enters into the meticulous hole that is formed on the above-mentioned metal mask, thereby forms dot pattern.According to the character in above-mentioned hole, can form various light spot forms, for example various light spot forms such as circle, quadrangle, rhombus.
Above-mentioned silk screen is not limited, preferably use the polyester net of 80～400 meshes.
Formed spot definition is not limited, be preferably 80～200 μ m, make at interval with 100～800 μ m, luminous point thickness (highly) is preferably 5～30 μ m.
Above-mentioned optical waveguide film 30 belows preferably are provided with the printed circuit board (PCB) 40 that has with the dome-type switch of the corresponding position of upper ledge, above-mentioned dome-type switch is by, contact 42 and be positioned at top, above-mentioned contact and constitute with the metal hemisphere 41 of above-mentioned contact distance certain distance.Above-mentioned metal hemisphere preferably uses the material with excellent elastic force, to improve sense of touch.
When the user pushed the keypad portion of keyboard, the metal hemisphere that is located at the printed circuit board (PCB) of specific button below was depressed, and makes metal hemisphere be contacted with the contact, thereby connected circuit.
When assemblying keyboard,, after preferably at first printed circuit board (PCB) that is provided with the dome-type switch and the back layer that is bonded with optical waveguide film being assembled, keypad portion is installed again in order to improve positioning accuracy.
Fig. 6 is the cutaway view of the illuminated keyboard among another embodiment of the present invention.As shown in the figure, be formed with warpage figure 32 on the incidence surface of above-mentioned fiber waveguide 30 films.By form the warpage figure at incidence surface, can prevent that part light from the phenomenon that the incidence surface of optical waveguide film is reflected, can improve into optical efficiency.
Fig. 7 is the cutaway view of the illuminated keyboard among another embodiment of the present invention.As shown in the figure, be formed with bright dipping figure (Pattern) 22 on the upper surface of the regulation of above-mentioned back layer 20 zone and upper ledge 21.The zone that is formed with above-mentioned bright dipping figure is preferably the button positions place of illuminated keyboard.Above-mentioned bright dipping figure can form convex or concavity, this is not done qualification.Pattern forming method can use methods such as moulding or hot pressing.Can reduce overleaf the light loss that the total reflection of layer or projection upper surface causes to greatest extent by above-mentioned bright dipping figure.
The various embodiments described above are used to describe in detail the present invention, and the present invention is not limited in described embodiment, and the professional in affiliated field can carry out various distortion, modification, omission fully in the technology of the present invention scope.
Claims (10)
1. illuminated keyboard, it comprises:
Be provided with the keypad portion of a plurality of buttons;
Back layer is positioned at above-mentioned keypad portion bottom, and has a plurality of upper ledge corresponding to all or part of above-mentioned button;
Optical waveguide film is formed on the bottom of above-mentioned back layer, and guiding is from the light of light source and to carry out face luminous,
The regulation zone of the upper surface of above-mentioned optical waveguide film or lower surface is formed with the dot pattern that is used to improve brightness.
2. illuminated keyboard according to claim 1 is characterized in that, is formed with the bright dipping figure on the upper surface of the regulation zone of above-mentioned back layer upper surface and upper ledge.
3. illuminated keyboard according to claim 1 is characterized in that, on part or all of above-mentioned dot pattern, includes the fluorophor that is used to improve brightness.
4. illuminated keyboard according to claim 1 is characterized in that, on part or all of above-mentioned dot pattern, includes the fluorophor of light wavelength being changed into the long wavelength.
5. as illuminated keyboard as described in each in the claim 1 to 4, it is characterized in that above-mentioned fluorophor uses at least a in YAG series, TAG series, the silicate series fluorophor.
6. as illuminated keyboard as described in each in the claim 1 to 4, it is characterized in that, be formed with the warpage figure on the incidence surface of above-mentioned optical waveguide film.
7. as illuminated keyboard as described in each in the claim 1 to 4, it is characterized in that above-mentioned dot pattern is to use on the central part that is combined in the retractility silk screen and is provided with metal mask with the corresponding hole of dot pattern, forms by mode of printing.
8. as illuminated keyboard as described in each in the claim 1 to 4, it is characterized in that, also comprise the printed circuit board (PCB) that is positioned at above-mentioned optical waveguide film bottom and has the dome-type switch.
9. the optical waveguide film that illuminated keyboard is used is characterized in that,
Above-mentioned optical waveguide film is luminous with formation face to the light channeling conduct from light source, and the regulation zone at the upper surface of this optical waveguide film or the back side is formed with the dot pattern that is used to improve brightness;
Above-mentioned dot pattern is to use on the central part that is combined in the retractility silk screen and is provided with metal mask with the corresponding hole of dot pattern, forms by mode of printing.
10. the optical waveguide film of using as illuminated keyboard as described in the claim 9 is characterized in that part or all of above-mentioned dot pattern comprises to be changed into light wavelength the long wavelength and improve the fluorophor of brightness.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2006-0088210 | 2006-09-12 | ||
| KR1020060088210A KR100765883B1 (en) | 2006-09-12 | 2006-09-12 | Light emitting keypad comprising lightguide film |
| KR1020060088210 | 2006-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101145457A true CN101145457A (en) | 2008-03-19 |
| CN101145457B CN101145457B (en) | 2010-04-14 |
Family
ID=39207892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101453475A Expired - Fee Related CN101145457B (en) | 2006-09-12 | 2007-09-11 | Light-emitting keyboard with optical waveguide film |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100765883B1 (en) |
| CN (1) | CN101145457B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010060340A1 (en) * | 2008-11-27 | 2010-06-03 | Byd Company Limited | Light guide board and light guide key board |
| CN103023475A (en) * | 2012-11-19 | 2013-04-03 | 珠海市魅族科技有限公司 | Touch button and terminal device using same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5293068B2 (en) * | 2008-01-07 | 2013-09-18 | パナソニック株式会社 | Movable contact body |
| KR100931065B1 (en) * | 2009-04-23 | 2009-12-11 | 주식회사 에스엘 | Keypad Assembly Structure of Mobile Phone Terminal |
| KR100935627B1 (en) * | 2009-05-26 | 2010-01-07 | 김대근 | Electronic instrument equipped with metal dome type switch |
| TWI689959B (en) * | 2019-09-26 | 2020-04-01 | 群光電能科技股份有限公司 | Keyboard backlight module and manufacturing method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3064489B2 (en) * | 1991-05-15 | 2000-07-12 | 京セラ株式会社 | Still video camera capable of displaying dimensions in three directions |
| JP4153058B2 (en) | 1997-06-19 | 2008-09-17 | アルプス電気株式会社 | Seat with reversing spring and key switch using the same |
| JP4398711B2 (en) | 2003-12-15 | 2010-01-13 | ポリマテック株式会社 | Illuminated keypad and illumination structure |
| KR100625809B1 (en) * | 2004-12-30 | 2006-09-20 | (주)에이원이노텍 | A method for manufacturing mobilephone key pad having with luminescent and fluorescent punction and the mobilephone key pad of the same |
| KR100610336B1 (en) | 2005-09-12 | 2006-08-09 | 김형준 | Light guide plate for backlight panel of keypad and its manufacturing method |
| KR200424232Y1 (en) | 2006-04-25 | 2006-08-22 | 주식회사 케이비에프 | Keypad back-light assembly of handheld device using light guide plate |
| KR200426230Y1 (en) | 2006-06-29 | 2006-09-12 | 주식회사 모젬 | Light Emitting Keypad |
-
2006
- 2006-09-12 KR KR1020060088210A patent/KR100765883B1/en not_active IP Right Cessation
-
2007
- 2007-09-11 CN CN2007101453475A patent/CN101145457B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010060340A1 (en) * | 2008-11-27 | 2010-06-03 | Byd Company Limited | Light guide board and light guide key board |
| CN103023475A (en) * | 2012-11-19 | 2013-04-03 | 珠海市魅族科技有限公司 | Touch button and terminal device using same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100765883B1 (en) | 2007-10-10 |
| CN101145457B (en) | 2010-04-14 |
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Granted publication date: 20100414 Termination date: 20120911 |