CN1965562A - El sheet and dome keypad using the same - Google Patents
El sheet and dome keypad using the same Download PDFInfo
- Publication number
- CN1965562A CN1965562A CNA2005800181773A CN200580018177A CN1965562A CN 1965562 A CN1965562 A CN 1965562A CN A2005800181773 A CNA2005800181773 A CN A2005800181773A CN 200580018177 A CN200580018177 A CN 200580018177A CN 1965562 A CN1965562 A CN 1965562A
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- plate
- vault
- pcb
- layer
- keypad
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- 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
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Abstract
The invention discloses an EL sheet and a dome keypad using the same. The EL sheet has an improved capability of light dispersion that can minimize the influence of static electricity or the electromagnetic waves, and by applying the EL sheet, the dome keypad of EL method can accurately recognize a pressed state of a key to increase the stability of the product and click rate. Accordingly, 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.
Description
Technical field
The present invention relates to EL plate (Electroluminescence sheet) and use its dome keypad (dome keypad), relate in particular to and be configured to EL plate and its dome keypad of use that minimizes static and electromagnetic influence and improve scattering of light.
Background technology
Usually, button is applied on the communicator as mobile phone and is used for practical use, as the switch of implementing to comprise the various miscellaneous functions that generate signal, is used in particular at night or the key of input character or symbol is distinguished and selected in the dark place.
Referring to the prior art shown in Fig. 1, the metal dome keypad of light-emitting diode (LED) method is widely used, and this dome keypad comprises keycap (key top) 110, metal dome plate 120, printed circuit board (PCB) (PCB) 130 and LED140.
Referring to Fig. 1, metal dome plate 120 is made up of face glue 122, metal dome 124 and primer 126.Before being used for fixing the face glue 122 of metal dome 124 and afterwards, protection glue, silver-colored printed layers and back protection glue before further adhering to are with blocking-up ESD/ electromagnetic interference (MI), protect printed layers or prevent the infringement of foreign body.
When electric power be applied to the LED140 that is arranged on above the PCB130,150 the time, the metal dome keypad of described LED method is used for backlight.
Yet the metal dome keypad of LED method has following major defect.In other words, because metal dome keypad, it can not be made into thin shape, and is tending towards making thick relatively shape.Also have the another one shortcoming, because the illumination of LED consumes a large amount of electric energy, the life-span of battery is shortened.Also having a shortcoming is can not keep even illumination owing to the arrangement position of LED, has therefore caused the difficulty in the design.
Therefore, for the above-mentioned shortcoming of the metal dome keypad of handling described LED method, develop actively the buttons of various employing EL (Electroluminescence) lamp luminescent methods (being called the EL method below).
Fig. 2 is the cross-sectional view of the metal dome keypad of traditional EL method, and this button comprises keycap 210, EL metal dome plate 220 and PCB230.EL metal dome plate 220 is made up of EL plate 222, metal dome 224 and primer 226.
When the metal dome keypad of the LED of comparison diagram 1 and Fig. 2 method, can notice that top glue 122 and LED140 are replaced as light emitting source by EL plate 222.
Fig. 3 is the detailed cross sectional view of EL metal dome plate that is applied to the metal dome keypad of traditional E L method, and Fig. 4 is the assembly process figure that is applied to the EL metal dome plate of metal dome keypad according to traditional E L method.
Referring to Fig. 3, EL metal dome plate 220 has been coated on predetermined adhesive in the rear surface of EL plate 222, EL plate 222 and metal dome 224, and perhaps EL plate 222 and the coated respectively adhesive of primer 226 adhere to.Primer 226 has predetermined adhesive 227 in surface-coated thereafter, so that printed layers 230 adheres to thereon.
Now, the function of the metal dome keypad of EL method will be explained.In operation, when pushing keycap 210, the fixedly contact terminal 231 of metal dome 224 and PCB230 contacts respectively betwixt, and is changed by the projection 211 of the rear surface that is arranged on keycap 210.
Referring to Fig. 4, the EL plate is bonded with double faced adhesive tape in its rear surface, perhaps is coated with the adhesive of scheduled volume in whole zone.Subsequently, primer is bonded to the rear surface of EL plate, and metal dome also is bonded to the rear surface of EL plate to finish the assembling of button.
Yet, controlled respectively by its clicking rate by following expression formula 1 as the button of switch.In other words, clicking rate is a kind of mechanical property of button, and it is controlled to be equal to, or greater than predetermined value (for example, 45 ± 10%).
＜expression formula 〉
Clicking rate=(applied load? release force/applied load) * 100%
Wherein applied load represents to be applied in when power the load value of the power of the maximum that is consumed when being used to operate metal dome, after release force is illustrated in and has operated metal dome, returns to the load value that initial condition consumes.
Now, contrast the metal dome keypad of described EL method and the metal dome keypad of traditional LED method.Metal dome keypad according to traditional LED method, the top glue that is used for metal dome plate 120 comprises that the thickness of adhesive approximately is 40 μ m, and the EL plate that is used for EL metal dome plate 220 comprises that the thickness of adhesive approximately is 170 μ m, this means the difference of about 130 μ m.
According to above-mentioned expression formula 1, there is a problem in the metal dome keypad of EL method, compares with the clicking rate of the metal dome keypad of LED method, and the clicking rate of EL method reduces relatively.As a result, when the user pushed the key of the metal dome keypad that is provided with the EL method, because bad clicking rate, the pressed state of key can not accurately be discerned, and causes repeatedly pressing key of user.
Simultaneously, if be subjected to static and electromagnetic influence, may bring the serious problems of properties of product of the EL plate of the metal dome keypad that is applied to the EL method.Especially, the particulate composition of luminescent substance sends the light that radius is 20-50 μ m usually, owing to for example shade existence between particulate, produces the problem of tone or brightness irregularities usually.
Summary of the invention
The present invention is disclosed addressing the above problem, and an object of the present invention is to provide and be configured to EL plate that minimizes static and electromagnetic influence and the dome keypad that uses it, and the EL with uniformly light-emitting surface is provided plate.Another object of the present invention provides a kind of EL plate and uses its dome keypad, and its EL plate that can accurately be discerned by the pressed state of using key to be providing stability, and has improved click-like feel.
For achieving the goal, EL provided by the invention system is provided with static electricity shield layer and scattering layer thereon, perhaps is this one deck in two-layer at least.
EL plate provided by the invention down further is provided with protection against noise layer and static electricity shield layer at it, perhaps is this one deck in two-layer at least.
The invention provides a kind of dome keypad of EL method, wherein this button comprises: be equipped with the fixedly printed circuit board (PCB) of contact terminal (PCB); Be arranged on the vault on the PCB, this vault is by the fixedly contact terminal of strain contact PCB; Gummy formation is stacked in PCB and goes up and be provided with the primer that vault is installed in the position on the PCB; Gummy formation is laminated to the EL plate on vault and the primer, and when power supply was applied in, EL plate self was luminous; And the keycap that is installed on the EL plate and has the projection that is used to push vault, wherein the EL plate is the EL plate that has improved top first section and second section definite stability and click-like feel.
In addition, the invention provides the EL plate that adhesive adhered to that applies in vault and the specific region by the rear surface of its EL plate, when the operation keycap, this EL plate is by pressing keycap contact vault.
In addition, the invention provides the dome keypad of EL method, when the EL of EL plate system was formed with static electricity shield layer thereon, the static electricity shield layer of this dome keypad was handled through silver salt sensitization in the zone except EL system illumination part, had therefore improved stability and click-like feel.
In addition, the invention provides EL plate and PCB, be provided with conduction biadhesive glue separately or the inner terminal of the connection conductive spacer that is used to switch on, therefore the improvement of stability and click-like feel is provided.
The invention provides a kind of dome keypad of EL plate obviously as can be known from top, it minimizes static and electromagnetic influence, improves scattering of light, and accurately discerns the state of pressing key by using the EL plate, therefore can increase the stability of product and improve clicking rate.In addition, conduction double faced adhesive tape or conductive spacer are used as electrifying connection apparatus and use between EL plate and PCB, have therefore reduced manufacturing cost, have improved operability and productivity.
Description of drawings
Fig. 1 is the cross-sectional view according to the metal dome keypad of the LED method of prior art.
Fig. 2 is the cross-sectional view of the general metal dome keypad of EL method.
Fig. 3 is the detailed cross sectional view of EL metal dome plate that is applied in the general metal dome keypad of EL method.
Fig. 4 is the assembling process figure of EL metal dome plate that is applied in the general metal dome keypad of EL method.
Fig. 5 is the cross-sectional view according to an embodiment of EL plate of the present invention.
Fig. 6 is the cross-sectional view according to the dome keypad of the EL method of having improved stability and click-like feel of the present invention.
Fig. 7 is the detailed cross sectional view according to the EL vault plate of the dome keypad that is applied in the EL method that has improved stability and click-like feel of the present invention.
Fig. 8 is the assembling process figure that the EL plate arch that has improved the dome keypad that is applied in the EL method of stability and click-like feel according to the present invention pushes up.
Fig. 9 is the state diagram that is formed with inner terminal according to of the present invention on the EL plate.
Figure 10 is the cross-sectional view of the state of the EL plate that is communicated with by conduction double faced adhesive tape or conductive spacer according to the present invention and PCB.
Embodiment
Hereinafter, will engage accompanying drawing and describe the preferred embodiments of the present invention in detail.At first, will describe in detail according to the EL plate that is used for button of the present invention.
The EL plate that is used for button according to the present invention comprises the EL system with light structures, and the static electricity shield layer of this EL system upper surface, scattering layer or this two-layer in one deck at least.In addition, the EL system comprises protection against noise layer and static electricity shield layer, perhaps the one deck at least in two-layer of this under the EL system.
Referring to Fig. 5, it is cross-sectional view according to an embodiment of EL plate of the present invention, preferably, according to the sequential cascade that is used for the EL plate of button according to protection against noise layer 21, insulating barrier 22, basal surface electrode layer 23, dielectric layer 24, luminescent layer 25, front surface electrode layer 26, insulating barrier 27, scattering layer 28 and static electricity shield layer 29 of the present invention.
In described hierarchy, it is apparent that it is possible changing stacked order and omitting some layer, and comprise within the scope of the invention.Basal surface electrode layer 23, dielectric layer 24, luminescent layer 25 and front surface electrode layer 26 comprise the EL system as the ray structure of EL plate.
Preferably, every layer manufacture method is the screen printing that is used for the plating film of product in the EL plate.
The structure of EL is not limited to present embodiment, and it can be applied to all EL ray structures in the known technology field.The structure of EL system is known in technical field of the present invention, so omitted further explanation (is Korea S's publication of 2000-0071435 referring to application number) here.
Formation at static electricity shield layer 29, scattering layer and/or the protection against noise layer 21 of the structure of the EL plate that is used for button is characteristics of the present invention, will be described in more detail below.
Static electricity shield layer 29 is formed the infringement to circuit part and EL system that is caused by the exterior static generation to prevent, and is used for by earth terminal the static that generates being discharged into PCB or product casing (product case).Preferably, static electricity shield layer 29 is made by high conductive material such as carbon, copper, silver and gold.The only formation of the zone the position of removing each key of forming button of static electricity shield layer 29 also can be positioned at the downside (not shown go out) or the upside of EL system.
Scattering layer 28 is used to improve the scattering of the light that luminescent layer generates.Preferably, be set up light is made by high photoconductive material by scattering layer 28 wherein, and can comprise the various materials that are used to improve light scattering.Preferably, can select various pigment, bead, calcium carbonate to be used for scattering layer 28.
The electromagnetic wave that protection against noise layer 21 blocking-up generates during in AC power when the EL system works, and be used to prevent to cause the noise of the faulty operation of the various device that is used for the EL plate.Preferably, protection against noise layer 21 is set at the basal surface of EL system.If protection against noise layer 21 is configured to by high conductive material such as carbon, copper, silver and gold, but be not limited to these, this protection against noise layer 21 block noise effectively so.
The EL plate prevents noise by forming the influence of static electricity shield layer 29 energy minimization static by the electromagnetism wave energy that forms the 21 blocking-up AC power generation of protection against noise layer.Especially, scattering layer 28 is set in the EL plate, with the color that improved light is provided and the uniformity of brightness, so the EL plate is suitable for use as the light-emitting component of button in the mobile phone.
Now, describe the dome keypad according to EL method of the present invention, it has the EL plate that is used for button, and has improved stability and click-like feel.It should be noted that luminous plaque according to common EL method also can comprise substitutes the EL plate that is used for button in the present invention, and is applied in the dome keypad according to EL method of the present invention.
Fig. 6 is that wherein button is made up of keycap 10, EL vault plate 100 and PCB50 according to the cross-sectional view of the dome keypad of the EL method of having improved stability and click-like feel of the present invention.EL vault plate 100 further comprises EL plate 20, vault 40 and primer 30.PCB50 is formed with and the be separated by fixing contact terminal 51 of preset distance of vault 40 thereon.
When electric power when the outside applies, EL plate 20 self is luminous.As previously mentioned, EL plate 20 is printed with predetermined static electricity shield layer or protection against noise layer in the zone except luminous component, to minimize static or electromagnetic influence.
In addition, vault 40 is bonded to the rear surface of EL plate 20.When the user pushes keycap 10, vault 40 elastic deformations, the fixedly contact terminal 51 of the projection 11 contact PCB50 by keycap 10.
Vault 40 is preferably made by metal material, but is not limited thereto, and can select all conductive other materials to be used for elastic deformation.For example, can use rubber mix carbon.
Fig. 7 is the detailed cross sectional view according to the EL vault plate of the dome keypad that is applied in the EL method that has improved stability and click-like feel of the present invention.Fig. 8 is the assembling process figure that the EL plate arch that has improved the dome keypad that is applied in the EL method of stability and click-like feel according to the present invention pushes up.
Referring to Fig. 7, in the presumptive area of the covering vault 40 of EL plate rear surface, be coated with adhesive 41 according to 100 of EL vault plates of the present invention, therefore have only the presumptive area of EL plate 20 and vault 40 to adhere to by the adhesive 41 that applies.
In addition, EL plate 20 and primer 30 are adhered to by the predetermined adhesive 41 that applies, and primer 30 is bonded with predetermined adhesive 32 in its rear surface, and PCB50 is thereon bonded.
Preferably, adhesive only is coated in the presumptive area of rear surface of EL plate 20 of contact vault 40, when the user when depressing keycap 10, described vault is depressed by the projection 11 of keycap 10.For example, as shown in Figure 5, the specific region attenuation on the rear surface of EL plate 20 is printed thereon and is coated with predetermined adhesive.
Now, referring to Fig. 8, the specific part of the rear surface of EL plate 20 contact vault 40, that depressed by the projection 11 of keycap 10 is set to adhesive surface, and its attenuation also is printed with adhesive.Next, EL plate 20 is bonded with primer 30 in its rear surface, and bonding again vault 40 is to finish assembling.
Fig. 9 is the state diagram that is formed with inner terminal according to of the present invention on the EL plate, shows to apply the inner terminal (by arrow illustrated) of electric power to EL plate 20.It should be noted that the present invention is not limited to this, can use traditional method to be communicated with power supply to EL plate 20.
Figure 10 is the cross-sectional view of the state of the EL plate that is communicated with by conduction double faced adhesive tape or conductive spacer according to the present invention and PCB.
Inner terminal 61 forms in the presumptive area of the rear surface of EL plate 20, and PCB50 also is formed with inner terminal 62 at its predetermined front surface.
Again referring to Fig. 8, between the inner terminal 61 of EL plate 20 sides and inner terminal 62, form an intended groove that does not have stacked primer 30, and predetermined double faced adhesive tape/conductive spacer 60 is inserted in this groove in the PCB50 side, bonding and be fixed therein.
In described structure, be applied to luminous EL plate according to the dome keypad that is equipped with advanced dome shape of EL method of the present invention, with the depressed state of accurate identification key, promote the stability of product and improve clicking rate.
Previous embodiment and advantage only are exemplary, are not interpreted as limiting the present invention.The present invention can easily be applied in the device of other type.Description of the invention is illustrative, does not limit the scope of the claims.To those skilled in the art, many selection, modifications and variations are conspicuous.In the claims, the sentence that method adds function is intended to cover structure described herein, and the function that execution is quoted not only structurally is equal to but also is equivalent configurations.
Commercial Application
Therefore, have a kind of EL plate of the invention provides of described feature, it has improved can be The light scattering ability of littleization static or electromagnetic impact. Use the invention provides of EL plate The dome keypad of EL method, it is the pressed state of identification key accurately, to increase the steady of product Qualitative and clicking rate. In addition, conductive double sided adhesive tape or conductive spacer are used as EL plate and PCB Between the energising jockey, to reduce manufacturing cost and to increase productivity. Therefore, use Generate and various auxiliary merit to can carry out signal such as the present invention in the communicator of mobile phone Can, especially can be used for fully having in the dark or distinguishing night the merit of numeral or character The button of energy.
Claims (6)
1, a kind of EL plate, the EL system is provided with static electricity shield layer and scattering layer, perhaps is this one deck in two-layer at least.
2, a kind of EL plate further is provided with protection against noise layer and static electricity shield layer under the EL system, perhaps be this one deck in two-layer at least.
3, the dome keypad of EL method comprises: be equipped with the fixedly PCB of contact terminal; Be arranged on the vault on the PCB, this vault is by the fixedly contact terminal of strain contact PCB; Gummy formation is stacked in the primer on the PCB, and it is provided with vault and is installed in position on the PCB; Gummy formation is laminated to the EL plate on vault and the primer, and when power supply was applied in, EL plate self was luminous; And be installed on the EL plate and be provided with the keycap of the projection of pushing vault, the EL plate of EL plate stability that has been top first section and second section definite improvement and click-like feel wherein.
4, button as claimed in claim 3 comprises the EL plate as claim 1 or claim 2.
5, button as claimed in claim 3, wherein the adhesive that applies in vault and the specific region that contacts vault of EL plate by the rear surface of EL plate is adhered to, and when keycap was operated, described vault was pressed by keycap.
6, button as claimed in claim 3, wherein EL plate and PCB are provided with the conduction double faced adhesive tape separately or are used to switch on and be connected the inner terminal of conductive spacer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040040985 | 2004-06-04 | ||
| KR1020040040985A KR100477080B1 (en) | 2004-06-04 | 2004-06-04 | El metal dome keypad improved stability and click ratio |
| KR1020040100000 | 2004-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1965562A true CN1965562A (en) | 2007-05-16 |
Family
ID=37387118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800181773A Pending CN1965562A (en) | 2004-06-04 | 2005-06-03 | El sheet and dome keypad using the same |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100477080B1 (en) |
| CN (1) | CN1965562A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847593A (en) * | 2017-04-14 | 2017-06-13 | 常州信息职业技术学院 | A kind of preparation method of weighing instrument film key switch and its antistatic backing |
| CN106847590A (en) * | 2017-04-14 | 2017-06-13 | 常州信息职业技术学院 | A kind of preparation method of film key switch and thin-film key panel |
| CN106876204A (en) * | 2017-04-14 | 2017-06-20 | 常州信息职业技术学院 | A kind of preparation method of mining instrument thin-film key switch and its screen layer |
| CN108695093A (en) * | 2018-07-31 | 2018-10-23 | 深圳市汇创达科技股份有限公司 | Noise reduction button module, electronic equipment and implementation method |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100627971B1 (en) * | 2006-01-09 | 2006-09-26 | 디케이 유아이엘 주식회사 | Unity type el keypad of portable appliance and thereof manufacturing method |
| KR100851658B1 (en) | 2006-12-26 | 2008-08-13 | 주식회사 두성테크 | The metal dome sheet having a wave guide sheet |
| KR100925823B1 (en) | 2008-04-17 | 2009-11-06 | 아이비컴어셈블리(주) | Dome sheet equipped with plunger for wireless telephone |
| KR101008671B1 (en) | 2009-03-20 | 2011-01-18 | 이강준 | Actuator Dome Sheet Manufactruing Method for Mobile Phone Key Pad |
| KR101208413B1 (en) | 2011-03-31 | 2012-12-05 | 김영엽 | Metal dome switch and production method of the same |
| KR101150302B1 (en) | 2012-03-12 | 2012-06-08 | 최종구 | Method for manufacturing reverse dome sheet |
-
2004
- 2004-06-04 KR KR1020040040985A patent/KR100477080B1/en not_active IP Right Cessation
-
2005
- 2005-06-03 CN CNA2005800181773A patent/CN1965562A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847593A (en) * | 2017-04-14 | 2017-06-13 | 常州信息职业技术学院 | A kind of preparation method of weighing instrument film key switch and its antistatic backing |
| CN106847590A (en) * | 2017-04-14 | 2017-06-13 | 常州信息职业技术学院 | A kind of preparation method of film key switch and thin-film key panel |
| CN106876204A (en) * | 2017-04-14 | 2017-06-20 | 常州信息职业技术学院 | A kind of preparation method of mining instrument thin-film key switch and its screen layer |
| CN106847593B (en) * | 2017-04-14 | 2018-09-11 | 常州信息职业技术学院 | A kind of production method of weighing instrument film key switch and its antistatic backing |
| CN106847590B (en) * | 2017-04-14 | 2019-02-26 | 常州信息职业技术学院 | A kind of production method of film key switch and thin-film key panel |
| CN106876204B (en) * | 2017-04-14 | 2020-03-06 | 常州信息职业技术学院 | Mining instrument thin film key switch and manufacturing method of shielding layer thereof |
| CN108695093A (en) * | 2018-07-31 | 2018-10-23 | 深圳市汇创达科技股份有限公司 | Noise reduction button module, electronic equipment and implementation method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100477080B1 (en) | 2005-03-17 |
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Open date: 20070516 |