WO2006059834A1 - Clavier luminescent ultra-mince - Google Patents

Clavier luminescent ultra-mince Download PDF

Info

Publication number
WO2006059834A1
WO2006059834A1 PCT/KR2005/002144 KR2005002144W WO2006059834A1 WO 2006059834 A1 WO2006059834 A1 WO 2006059834A1 KR 2005002144 W KR2005002144 W KR 2005002144W WO 2006059834 A1 WO2006059834 A1 WO 2006059834A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
keypad
light emitting
protrusion
rear surface
Prior art date
Application number
PCT/KR2005/002144
Other languages
English (en)
Inventor
Woon Ho Baek
Byung Dong Chun
Ki Sub Choi
Jong Cheul An
Kyoung Sam Kook
In Shik Park
Kyoung Hyoun Lee
Original Assignee
Hanwool Information Tech. Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020040100000A external-priority patent/KR20050094333A/ko
Priority claimed from KR1020050043675A external-priority patent/KR100514759B1/ko
Application filed by Hanwool Information Tech. Co., Ltd. filed Critical Hanwool Information Tech. Co., Ltd.
Publication of WO2006059834A1 publication Critical patent/WO2006059834A1/fr

Links

Classifications

    • 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
    • H01H13/702—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2211/00—Spacers
    • H01H2211/006—Individual areas
    • H01H2211/01—Ink
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H01H2219/018—Electroluminescent panel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/002—Actuators integral with membrane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/022—Collapsable dome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/002—Screen printing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/004—High frequency adaptation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/008—Static electricity considerations

Definitions

  • the present invention relates to a super thin type light emitting keypad, and more particularly to a super thin type light emitting keypad formed with an EL (Electro Luminescence) device at an upper surface of a rear surface layer formed thereunder with a protrusion such that destruction caused by deformation of EL device can be prevented, light emitting efficiency and luminance can be increased, and a plurality of elastic layer, each spaced a predetermined distance apart, are disposed to remarkably improve click feeling and switching accuracy, and the EL device is equipped with a dispersion layer, a static electricity shield layer and a noise stop layer to enable to minimize influence of static electricity or electromagnetic wave and to provide a uniform light emitting surface.
  • EL Electro Luminescence
  • a light emitting keypad is applied to communication devices such as mobile phones for practical use as a switch for conducting various supplemental functions including signal generation, and particularly for conducting functions to distinguish and select keys for inputting characters or symbols at night or in a dark area, and concomitant with acceleration of thinning of the mobile phones, development of super thin light emitting keypads is keeping pace therewith.
  • a light emitting keypad of existing LED (Light Emitting Diode) method used as light source cannot be manufactured in thin type due to fabrication constraints and is manufactured in a relatively thick structure.
  • Another drawback of a light emitting keypad by the LED method is that a large amount of power is consumed to shorten the life of a battery.
  • Still another drawback is that light emitting uniformity cannot be maintained according to arranged position of LED resulting in a difficulty in design.
  • FIG.1 is a cross-sectional view of a known light emitting keypad by EL method for complementing the aforementioned drawbacks.
  • the keypad is disposed with a key top (110), a metal dome sheet
  • the EL metal dome sheet (120) is made of an EL sheet (121), a metal dome (123) and a base tape (122) to thereby enable to realize a super thin structure and a reduced power consumption.
  • PCB Printed Circuit Board
  • the present invention is conceived to solve the aforementioned problems and it is an object of the present invention to provide a super thin type light emitting keypad formed with an EL (Electro Luminescence) device at an upper surface of a rear surface layer formed thereunder with a protrusion such that destruction caused by deformation of EL device can be prevented, light emitting efficiency and luminance can be increased, and a plurality of elastic layer, each spaced a predetermined distance apart, are disposed to remarkably improve click feeling and switching accuracy, and the EL device is equipped with a dispersion layer, a static electricity shield layer and a noise stop layer to enable to minimize influence of static electricity or electromagnetic wave and to provide a uniform light emitting surface.
  • EL Electro Luminescence
  • the present invention provides a super thin type light emitting keypad comprising: an ink layer formed underneath a substrate; an EL device formed underneath the ink layer; an elastic layer formed underneath the EL device; and a rear surface layer disposed underneath the elastic layer and having a protrusion.
  • the keypad as defined in claim 1 further comprising: a PCB having a contact terminal; and a metal dome positioned from an upper surface of the contact terminal.
  • the keypad further comprises an adhesive layer between the EL device and the elastic layer.
  • the EL device comprises; an EL system for illuminating lights and at least one layer or more out of a dispersion layer at an upper surface or a lower surface of the EL system, a static electricity shield layer and a noise stop layer.
  • at least one or more out of the ink layer, the EL device, the elastic layer, the rear surface layer and the protrusion is formed by screen printing method.
  • the protrusion is formed to the rear surface layer by thermo-compression method.
  • the protrusion and the rear surface layer are integrally formed.
  • the elastic layer is formed in plural numbers, and the plurality of elastic layer are formed each horizontally spaced a predetermined distance apart to correspond to a region formed with the protrusion.
  • the present invention provides a super thin type light emitting keypad formed with an EL (Electro Luminescence) device at an upper surface of a rear surface layer formed thereunder with a protrusion such that destruction caused by deformation of EL device can be prevented, light emitting efficiency and luminance can be increased, and a plurality of elastic layer, each spaced a predetermined distance apart, are disposed to remarkably improve click feeling and switching accuracy, and the EL device is equipped with a dispersion layer, a static electricity shield layer and a noise stop layer to enable to minimize influence of static electricity or electromagnetic wave and to provide a uniform light emitting surface.
  • EL Electro Luminescence
  • FTG.1 is a cross-sectional view of a light emitting keypad by EL method according to the prior art.
  • FIG.2 is a cross-sectional view of a super thin light emitting keypad according to the present invention.
  • FIG.3 is a cross-sectional view of another embodiment of a super thin light emitting keypad according to the present invention.
  • FIG.4 is a cross-sectional view of a super thin light emitting keypad of EL device according to the present invention.
  • FIG.2 is a cross-sectional view of a super thin light emitting keypad according to the present invention.
  • the super thin light emitting keypad according to the present invention includes an ink layer (2) formed underneath a substrate (1), an EL device (3) formed underneath the ink layer (2), an elastic layer (5) formed underneath the EL device (3), and a rear surface layer (6) formed underneath the elastic layer (5) and equipped with a protrusion (7), where an adhesive layer (4) is further disposed between the EL device (3) and the elastic layer (5) for the super thin light emitting keypad.
  • the substrate (1) is not limited to its shape and thickness, it is preferred that a super thin elastic substrate be used and the super thin elastic substrate have an excellent light transmission factor.
  • the super thin elastic substrate is made of resin such as PET, polyurethane or the like.
  • the thickness of the substrate is not limited either but it is preferred that the thickness of the substrate be 100 ⁇ 150 ⁇ m for super thin thickness.
  • the ink layer designed to indicate a key for the keypad embodies a front shape of the keypad.
  • the ink layer is formed by coating keypad ink by way of spray or screen printing method at a bottom surface of the substrate (1), and it is preferred that the thickness of the ink layer be 5 ⁇ lO ⁇ m.
  • the EL device (3) which is an illuminating region is not particularly restricted in structure and fabricating method thereof, and structure and fabricating method of the EL device (3) disclosed or used for the technical field of the present invention may be selected without any restriction.
  • the thickness of the EL device is 100 ⁇ 150 ⁇ m in consideration of super thin structure and illuminating function.
  • the EL device is placed adjacent to the front of the keypad to enable to maximize the light emitting efficiency. Furthermore, luminance can be relatively increased due to no light loss caused by a key top made of silicon material according to the prior art.
  • the elastic layer (5) which is one of the features of the present invention is disposed to facilitate a smooth manipulation of the key pad and to improve a click feeling and an accurate switching.
  • the elastic layer (5) may be formed across the board underneath the EL device (3), and preferably, as illustrated in FIG.2, the elastic layer (5) is formed in plural numbers each horizontally spaced a predetermined distance apart to correspond to a region where the protrusion (7) is formed. By spacing the plural elastic layer (5) apart, an accurate switching can be further implemented.
  • Material of the elastic layer (5) is not limited as long as it has good elasticity, and preferably, the elastic layer (5) is a super thin metal plate or a super thin plastic plate. Preferably, the elastic layer (5) has a thickness of 100 ⁇ 200 ⁇ m. Furthermore, in order to facilitate the smooth key operation, the elastic layer (5) is internally cut by etching or mold.
  • a method of forming the elastic layer (5) to the EL device (3) is by way of providing a separate adhesive layer (4) and letting it adhere therebetween to thereby achieve an excellent adhesiveness.
  • the adhering method may be of using a screen-printed printing adhesive or an adhesive tape.
  • Another adhering method may be such that the rear surface layer (6) covers the elastic layer (5) and also serves to glue the elastic layer (5) to the EL device (3).
  • the rear surface layer (6) serves to cover the elastic layer (5). Furthermore, the elastic layer is disposed thereunder with the protrusion (7) to provide a better keypad manipulating and clicking feels and an effective switching
  • Material of the rear surface layer (6) is not limited, but preferably, silicon, high polymer resin or the like is selectable.
  • liquid silicon, film silicon or high polymer resin is compression-molded to the rear surface layer (6) or the protrusion (7) under 100-150 degrees Celsius, or by photolithography method, ultraviolet hardening or infrared hardening ink is screen-printed for formation.
  • the present invention is further disposed with a Printed Circuit Board (PCB, 8) formed underneath the rear surface layer (6) and formed thereon with contact terminals (81) and metal domes (82) formed on the contact terminals (81), each metal dome (82) and contact terminal (81) being spaced at a predetermined distance apart.
  • PCB Printed Circuit Board
  • the PCB (8) is formed thereon with metal domes (82) and contact terminals (81), each contact terminal (81) being spaced a predetermined distance apart, and each metal dome (82) being situated above the contact terminal (81) at a predetermined distance apart.
  • F1G.3 is a cross-sectional view of a super thin light emitting keypad of EL device according to the present invention.
  • FIG. 3 is only an exemplary drawing and it should be apparent that modification of the layered order of illustrated structure and partial omission thereof all belong to the scope of the present invention.
  • the EL device (3) is fabricated by being layered on the ink layer (2) in sequence of a static electricity shield layer (31), a dispersion layer (32), an insulation layer (33), a front electrode layer (34), a light emitting layer (35), a dielectric layer (36), a rear electrode layer (37), an insulation layer (38) and a noise stop layer (39).
  • the front electrode layer (34), the light emitting layer (35), the dielectric layer (36) and the rear electrode layer (37) comprise an EL system which is a light emitting structure of the EL device (3).
  • the fabricating method of the EL device (3) is to form the EL device (3) underneath the ink layer (2) by way of screen printing method for thin film structure.
  • the forming of layer other than the static electricity shield layer (31), the dispersion layer (32) and the noise stop layer (39) is a well-known art in the related field and explanation thereto will not be elaborated herein but the forming of the static electricity shield layer (31), the dispersion layer (32) and the noise stop layer (39) is the feature of the present invention such that detailed description thereto will be made hereunder.
  • the static electricity shield layer (31) is formed to guard against damage of circuit parts and EL system caused by generation of external static electricity and serves to discharge the generated static electricity to the PCB (8) or a device case via a ground terminal.
  • the static electricity shield layer (31) is made of material of high electric conductivity such as carbon, copper, silver, gold or the like.
  • the dispersion layer (32) functions to help improve the dispersion of light generated by the light emitting layer (35).
  • the dispersion layer (32) is made of material of good light transmission factor and may include various materials for improving dispersion of light.
  • carbon, copper, silver, gold and the like will do but are not limited thereto.
  • a fabricating method reverse from that of the present invention is also possible without departing from the spirit of the invention.
  • a rear surface layer may be first formed and then an elastic layer, an EL device (An inner structure in reverse sequence is also possible), an ink layer and a substrate may be sequentially stacked without departing from the spirit and scope of the present invention.
  • the EL sheet may be specifically formed at an upper surface of the elastic layer.
  • the present invention having the features thus described provides a super thin type light emitting keypad formed with an EL (Electro Luminescence) device at an upper surface of a rear surface layer formed thereunder with a protrusion such that destruction caused by deformation of EL device can be prevented, light emitting efficiency and luminance can be increased, and a plurality of elastic layer, each spaced a predetermined distance apart, are disposed to remarkably improve click feeling and switching accuracy, and the EL device is equipped with a dispersion layer, a static electricity shield layer and a noise stop layer to enable to minimize influence of static electricity or electromagnetic wave and to provide a uniform light emitting surface.
  • the present invention applied to communication devices such as mobile phones can perform a signal generation and various supplementary functions, and particularly can be adequately used for a keypad having a function of distinguishing numbers or characters in the dark or at night.

Abstract

L'invention concerne un clavier luminescent ultra-mince qui comprend un dispositif EL (électroluminescent) disposé sur la face supérieure d'une couche de base, et présentant une protubérance définie de manière à résister à la destruction par déformation du dispositif EL, et à augmenter le rendement lumineux et la luminance, ainsi qu'une pluralité de couches élastiques espacées les unes des autres par une distance prédéterminée, permettant d'améliorer sensiblement la sensation de frappe et la précision de sélection. Le dispositif EL est équipé d'une couche de dispersion, d'une couche de protection électrostatique, et d'une couche antibruit, permettant de réduire l'effet de l'électricité statique ou des ondes électromagnétiques, et de produire une surface luminescente uniforme.
PCT/KR2005/002144 2004-12-01 2005-07-05 Clavier luminescent ultra-mince WO2006059834A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2004-0100000 2004-12-01
KR1020040100000A KR20050094333A (ko) 2004-03-22 2004-12-01 키패드용 ｅｌ 소자
KR1020050043675A KR100514759B1 (ko) 2005-05-24 2005-05-24 초박형 발광 키패드
KR10-2005-0043675 2005-05-24

Publications (1)

Publication Number Publication Date
WO2006059834A1 true WO2006059834A1 (fr) 2006-06-08

Family

ID=36565249

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/002144 WO2006059834A1 (fr) 2004-12-01 2005-07-05 Clavier luminescent ultra-mince

Country Status (1)

Country Link
WO (1) WO2006059834A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008002269A1 (fr) * 2006-06-30 2008-01-03 Sinco Technologies Pte. Ltd Module de clavier
WO2008066490A1 (fr) * 2006-12-01 2008-06-05 Sinco Technologies Pte Ltd 'ielk' (dessus du clavier el intelligent)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636593A (en) * 1985-03-13 1987-01-13 Motorola Inc. Light conducting, elastomeric membrane keypad
KR20020010469A (ko) * 2001-05-22 2002-02-04 양윤홍 이엘램프 내장 일체형 키패드
KR20030020739A (ko) * 2001-09-04 2003-03-10 엘지전자 주식회사 휴대단말기의 키패드 백라이팅 장치

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636593A (en) * 1985-03-13 1987-01-13 Motorola Inc. Light conducting, elastomeric membrane keypad
KR20020010469A (ko) * 2001-05-22 2002-02-04 양윤홍 이엘램프 내장 일체형 키패드
KR20030020739A (ko) * 2001-09-04 2003-03-10 엘지전자 주식회사 휴대단말기의 키패드 백라이팅 장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008002269A1 (fr) * 2006-06-30 2008-01-03 Sinco Technologies Pte. Ltd Module de clavier
WO2008066490A1 (fr) * 2006-12-01 2008-06-05 Sinco Technologies Pte Ltd 'ielk' (dessus du clavier el intelligent)

Similar Documents

Publication Publication Date Title
US5138119A (en) Backlit tactile keyboard with improved tactile and electrical characteristics
EP1782169B1 (fr) Ensembles et composants de claviers minces pour dispositifs electroniques et procedes associes
US7015408B2 (en) Switch unit capable of directly illuminating switch operating position
JPH05128939A (ja) バツクライト付きタクタイルキーボード
JP2007523456A (ja) スイッチ
US7705256B2 (en) Thin key sheet
KR100756792B1 (ko) Ｅｌ조광식 스위치
WO2006126769A1 (fr) Clavier luminescent ultramince
WO2006059834A1 (fr) Clavier luminescent ultra-mince
KR100583353B1 (ko) 전도성 고분자로 구성된 전면전극층 및 배면전극층을 포함한 무기 el 램프, 상기 무기 el 램프를 이용한 키패드 및 그의 제조방법
JP2000113762A (ja) 照光式押釦スイッチ
KR20060116057A (ko) 이엘 램프시트 및 그의 제조 방법
WO2007145423A1 (fr) Clavier lumineux
KR100705483B1 (ko) 발광 키패드
JPH1139983A (ja) Ｅｌ照光シート及びｅｌ照光式スイッチ
KR100830542B1 (ko) 발광 키패드용 이엘(ｅｌ) 디바이스
KR100737763B1 (ko) 발광 키패드
KR20070049920A (ko) 초박형 발광 키패드
KR20080099930A (ko) 투명 전도성 접점 구조를 갖는 키패드 및 그 제조방법
KR100844441B1 (ko) 개인휴대단말기용 버튼 플레이트
WO2008078143A1 (fr) Ensemble clavier
KR200426232Y1 (ko) 발광 키패드용 이엘(ｅｌ) 디바이스
KR100762711B1 (ko) 발광 키패드용 이엘(ｅｌ) 디바이스
KR200426005Y1 (ko) 발광 키패드
JP2001176353A (ja) キースイッチ

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 69(1) EPC ( EPO FORM 1205A DATED 17.09.2007)

122 Ep: pct application non-entry in european phase

Ref document number: 05765908

Country of ref document: EP

Kind code of ref document: A1