CN101123833A

CN101123833A - EL key device and its making method

Info

Publication number: CN101123833A
Application number: CNA2006101042755A
Authority: CN
Inventors: 邓力升; 林诗岚
Original assignee: TEEHWA TECHNOLOGY CORP
Current assignee: TEEHWA TECHNOLOGY CORP
Priority date: 2006-08-09
Filing date: 2006-08-09
Publication date: 2008-02-13

Abstract

The invention relates to an electroluminescent keystoke device and the manufacture method of the device. The invention mainly presses a metal wire layer, a transparency insulating layer, a carbon line layer, a transparent conducting layer, a luminous layer, a white dielectric layer, a carbon back layer, a silver back layer and a covering layer on a base plate of an electrically non-conductive material printed with keystoke letterforms in order. The settling of the carbon line layer and the carbon back layer can lead the applied current to be much uniformly arranged on the conducting layer and the silver back layer to avoid the phenomenon of uneven luminous brightness of partial areas in the luminous layer. And the setting of the transparency insulating layer can avoid bad circuit conduction caused by the factors of dust fall or adhered by other conducting impurities. Besides, the white dielectric layer can provide a capacity effect to reserve the instant electric power needed when the luminous layer is shining and can be a white background when the luminous layer is shining.

Description

EL key device and manufacture method thereof

Technical field

The invention relates to a kind of EL key device and manufacture method thereof, especially refer to a kind of on the button substrate in conjunction with EL layer and relevant circuit layer, rely on to apply electric current and can make described EL layer luminous and produce a kind of EL key device of soft cold light effect from described button substrate back.

Background technology

Along with the progress and the consumer demand of science and technology, many Portable consumption electronic products are developed like the mushrooms after rain, in order to consumer's communication at any time, acquisition and use information.Many Portable consumption electronic products have key device (Keypad) in order to have more interactive relationship between energy and user so possess more, can import corresponding instruction or character for the user.For example: intelligent mobile phone (SmartPhone), personal digital assistant (Personal Digital Assistant; PDA), with mobile computer etc.

Once had the dealer to design and can send keypad device of mobile phone backlight, it not only is not easy to use the person at dark place operation push-button, and visual modish sense and modern sense more are provided.But, these are existing to be used for producing at button the technology of light behind, mostly be rely on button behind the mode of the backlight module that constituted by cold cathode fluorescent lamp (CCFL) or light-emitting diode (LED) collocation backlight (or being called light diffusing sheet) of device one reach, not only overall structure thickness is relatively thicker, manufacturing cost is higher relatively and the single structure that more can't be combined into one with button itself for it.

United States Patent (USP) USPatNo.5856030 and USPatNo.6270834 case once disclosed a kind of EL device 10.See also shown in Figure 1ly, it is the circuit generalized section of the disclosed existing EL device of USPatNo.5856030 and USPatNo.6270834.Described existing EL device 10 mainly is to change on the paster 11 one to form in regular turn: and the indium tin oxide layer 13 of first coating layer 12 of polyurethane (Polyurethane) thin-film material, conduction (Indium Tin Oxide, ITO), second coating layer 18 of metallic circuit layer 14, EL layer 15, dielectric layer 16, back of the body conductive layer 17 and thin polyurethane membrane material.Rely on the alternating current that between indium tin oxide layer 13 and back of the body conductive layer 17, imposes predetermined voltage, can make EL layer 15 produce light.Yet described existing EL device 10 still has following deficiency:

(1) because the conductive characteristic of metallic circuit layer 14 and tin oxide layer 13, make that the distribution of electric current is unequal, bigger electric current is more easily arranged by EL layer 15 near near metallic circuit layer 14 and electrode contact 19, not only electric current is unstable and luminosity is also more inhomogeneous.

(2) in the processing procedure process of existing EL device 10, Chang Wufa avoids having the influence of dust fall or other electrically conductive particles.Because the live width of metallic circuit layer 14 is narrower, will cause circuit turn-on bad easily if be subjected to the obstruction of dust fall.And if when being attached with electrically conductive particles, when also causing follow-up formation EL layer 15 easily with dielectric layer 16, in uneven thickness in the position of described electrically conductive particles, or even electrically conductive particles takes place directly and back of the body conductive layer 17 conductings and cause short circuit.

(3) with polyurethane (Polyurethane) first and

second coating layer

12,18 that thin-film material was constituted, it is too soft and extending on architectural characteristic, and the key device that is not suitable for being used as the architectural characteristic that needs suitable elastic force (restoring force) uses.

Summary of the invention

First purpose of the present invention provides an EL key device and a manufacture method thereof, can rely on to set up a carbon line layer on metal line layer, so that the CURRENT DISTRIBUTION that applies is more even.

Second purpose of the present invention provides an EL key device and a manufacture method thereof, can rely on to set up a transparent insulating layer on metal line layer, can avoid the bad or short circuit phenomenon of circuit turn-on that causes because of dust fall or other electrically conductive particles.

For achieving the above object, the technical solution used in the present invention is:

A kind of EL key device includes:

One button substrate is by the insulation material is constituted;

Conductive module before one is on the surface attached to substrate;

One luminescent layer is attached on the preceding conductive module and be to cover a light-emitting zone;

One back conductive module is positioned on the luminescent layer, can make described luminescent layer produce light by means of impose scheduled current between forward and backward conductive module; And

One protective layer combines with described substrate and with described back conductive module, luminescent layer, be coated on therebetween with preceding conductive module;

It is characterized in that described preceding conductive module is more to include:

One metal line layer is looped around the nearly outer rim place of described substrate;

One carbon line layer covers on the described metal line layer; With

One transparency conducting layer is formed on the carbon line layer and covers described light-emitting zone at least.

Described metal line layer is for relying on printing process to be formed on the substrate gold, silver, copper, nickel, aluminium or its alloy; And the shape of described carbon line layer is to be same as described metal line layer shape; In addition, between described carbon line layer and described metal line layer, more be provided with a transparent insulating layer, described transparent insulating layer is to cover described light-emitting zone at least, and be to be provided with the circuit fluting that is same as described metal line layer shape corresponding to the metal line layer part on described transparent insulating layer, the carbon line layer is slotted by described circuit with metal line layer and is electrically connected.

The shape of described metal line layer is to include: with a U font structure ring reach the standard grade around one of bottom of substrate and the nearly outer rim of two sides place a layer portion, be positioned at least two electrode contacts that roll off the production line layer portion and be positioned at the nearly upper limb place of substrate of the nearly lower edge of substrate with an inverted T-shape structure; Wherein, described upper and lower line layer portion is at the side projection profile that is a similar goblet in shape; And one of them is arranged in described two electrode contacts is directly to be connected metal line layer, and another electrode contact then is to connect the back conductive module.

Described EL key device more includes:

One white dielectric layer covers on the luminescent layer and covers described light-emitting zone at least;

And described back conductive module is more to include:

One carbon backing layer extensively covers on the described white dielectric layer; And

One silver medal backing layer extensively covers on the described carbon backing layer.

Be to be printed with button relevant font or pattern on described substrate, and the material of described substrate be following wherein one: hard PC plate, rubber, silicon rubber or the combined type material substrate that is combined by the polyethylene terephthalate sheet of two variable thickness.

For achieving the above object, the technical solution used in the present invention also includes:

A kind of EL key device, it includes:

One button substrate is that the insulation material constitutes;

Conductive module before one is on the surface attached to substrate;

One transparent insulating layer covers described light-emitting zone at least, and is to be provided with the circuit fluting that is same as described metal line layer shape corresponding to the metal line layer part on described transparent insulating layer; With

One transparency conducting layer is located on the transparent insulating layer and covers described light-emitting zone.

More be provided with a carbon line layer between described transparent insulating layer and described transparency conducting layer, the shape of described carbon line layer is to be same as described metal line layer shape, and described carbon line layer is electrically connected by described circuit fluting with metal line layer; In addition, be to be printed with button relevant font or pattern on described substrate, and the material of described substrate be following wherein one: hard PC plate, rubber, silicon rubber or the combined type material substrate that is combined by the polyethylene terephthalate sheet of two variable thickness.

The shape of described metal line layer is to include: with a U font structure ring reach the standard grade around one of bottom of substrate and the nearly outer rim of two sides place a layer portion, be positioned at least two electrode contacts that roll off the production line layer portion and be positioned at the nearly upper limb place of substrate of the nearly lower edge of substrate with an inverted T-shape structure; Wherein, described upper and lower line layer portion is at the side projection profile that is a similar goblet in shape; And, have in described two electrode contacts wherein one be directly to be connected metal line layer, another electrode contact then is directly to be connected the back conductive module.

Described EL key device more includes:

And described back conductive module is more to include:

A kind of manufacture method of EL key device includes the following step:

(A) printing one metal line layer is on a substrate, and described substrate is that the insulation material constitutes;

(B) printing one carbon line layer, the shape of described carbon line layer and position are corresponding to described metal line layer;

(C) printing one transparency conducting layer, described transparency conducting layer is to cover described light-emitting zone;

(D) printing one luminescent layer is on described transparency conducting layer, and described luminescent layer is to cover described light-emitting zone;

(E) printing one white dielectric layer is on described luminescent layer, and described white dielectric layer is to be encompassed in described luminescent layer;

(F) form a back conductive module on described white dielectric layer, can make described luminescent layer produce light by means of between metal line layer and back conductive module, imposing scheduled current; And

(G) printing one protective layer is on the conductive module of described back, and the periphery of described protective layer is to combine with described substrate and with aforesaid metal line layer, carbon line layer, transparency conducting layer, luminescent layer, white dielectric layer, be coated between substrate and the protective layer with back conductive module.

Between step (A) and step (B), more include the following step:

(A1) printing one transparent insulating layer is on described metal line layer, described transparent insulating layer is to cover a light-emitting zone, and transparent insulating layer is being to be provided with the circuit fluting that is same as the metal line layer shape corresponding to the metal line layer part, the carbon line layer is to be printed on the transparent insulating layer, and the carbon line layer is electrically connected by described circuit fluting with metal line layer.

The step of conductive module is more to include after the described formation of step (F):

(F1) printing one carbon backing layer is on described white dielectric layer, and described carbon backing layer is to be encompassed in described white dielectric layer; And

(F2) printing one silver medal backing layer is on described carbon backing layer, and described carbon backing layer is to be encompassed in described carbon backing layer.

Be to be printed with button relevant font or pattern on described substrate, and the material of described substrate be following one of them: hard PC plate, rubber, silicon rubber or the combined type material substrate that is combined by the polyethylene terephthalate sheet of two variable thickness.

Compared with prior art, the beneficial effect that has of the present invention is:

(1) substrate of the present invention is to adopt hard PC plate non-conductive, relatively hard, can be suitably crooked but not extending made, it is fitted and is being taken as that button uses and the EL key device of producing one, make the present invention can have that more traditional existing backlight module thickness is thinner, cost is lower and more can and the effects such as single structure that directly are combined into one of button itself.

(2) the present invention can make the CURRENT DISTRIBUTION that applies more even by means of set up carbon line layer and carbon backing layer respectively on metal line layer and silver-colored backing layer.

(3) the present invention has the transparent insulating layer 22 that circuit is slotted by means of set up one between metal line layer and carbon line layer, can avoid the bad or short circuit phenomenon of circuit turn-on that causes because of dust fall or other electrically conductive particles.

(4) the present invention relies on the mode of printing one white dielectric layer on luminescent layer, can provide a capacity effect with the deposit luminescent layer required moment electric power when luminous, and can be used as the white background of luminescent layer when luminous.

Description of drawings

Fig. 1 is the circuit generalized section of the disclosed existing EL device of USPatNo.5856030 and USPatNo.6270834;

Fig. 2 is the schematic diagram of each circuit layer composition order in the EL key device of the present invention;

Fig. 3-1 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-2 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-3 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-4 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-5 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-6 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-7 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-8 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-9 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 3-10 is the manufacturing process schematic diagram of EL key device of the present invention;

Fig. 4 is the three-dimensional exploded perspective view of each circuit layer of EL key device of the present invention.

The existing EL key device of description of reference numerals: 1-; 11-changes paster; 12-first coating layer; The 13-indium tin oxide layer; 14-metallic circuit layer; 15-EL layer; The 16-dielectric layer; 17-carries on the back conductive layer; 18-second coating layer; The 19-electrode contact; 2-EL key device of the present invention; The 20-substrate; 201,202,203-perforate; The 21-metal line layer; 211,212-electrode; The 213-layer portion that reach the standard grade; The 214-layer portion of rolling off the production line; The 22-transparent insulating layer; The 221-perforate; 222-circuit fluting; 23-carbon line layer; The 24-transparency conducting layer; The 241-perforate; 242,243-electrode breach; The 25-luminescent layer; The 251-perforate; 252,253-electrode breach; 26-white dielectric layer; The 261-perforate; 262,263-electrode breach; 27-carbon backing layer; The 271-perforate; 272,273-electrode contact; 28-silver backing layer; The 281-perforate; 282,283-electrode contact; The 29-protective layer; The 291-perforate; 292,283-electrode otch; The 3-process sequence.

Embodiment

See also Fig. 2, Fig. 3-1～Fig. 3-10, shown in Figure 4, it is a preferred embodiment that discloses EL key device of the present invention.Wherein, shown in Figure 2 is the schematic diagram of each circuit layer composition order in the EL key device of the present invention.It shown in Fig. 3-1～Fig. 3-10 the manufacturing process schematic diagram of EL key device of the present invention.Fig. 4 is the three-dimensional exploded perspective view of each circuit layer of EL key device of the present invention.

As Fig. 2 and shown in Figure 4, and with reference to the manufacturing process of each circuit layer of the EL key device of the present invention shown in figure 3-1～Fig. 3-10.Described EL key device 2 of the present invention mainly is to form in regular turn with mode of printing on a substrate 20: a metal line layer 21, a transparent insulating layer 22, a carbon line layer 23, a transparency conducting layer 24, a luminescent layer 25, one white dielectric layer 26, a carbon backing layer 27, a silver medal backing layer 28 and a protective layer 29 are constituted.Wherein, described metal line layer 21, transparent insulating layer 22, and carbon line layer 23 are conductive modules (unnumbered) before between luminescent layer 25 and substrate 20, constituting in fact, carbon backing layer 27 and silver-colored backing layer 28 then are to constitute a back conductive module (unnumbered) at luminescent layer 25 in fact away from the side of substrate 20, rely on the alternating current that between forward and backward conductive module, imposes predetermined voltage, intensity and frequency, can impel described luminescent layer 25 to produce cold light.

At first, shown in Fig. 3-1, prepare a button substrate 20, and on described substrate 20, print a metal line layer 21.In the present embodiment, described substrate 20 is that a non-conductive and surperficial hard PC plate (Plastic Circuit Board) that does not carry out circuit fabrication constitutes, and its thickness can be preferable between 100～600 μ m.Within this specific thicknesses scope, the substrate 20 that described hard PC plate is constituted can provide: can be in right amount crooked, enough structural strengths of tool but not extending architectural characteristic are very suitable for being taken as " button substrate " and use.Yet, but in other embodiment, substrate 20 of the present invention also can select for use thickness to make between rubber (rubber) or the silicon rubber (TPU) of 100～1000 μ m, or also can use polyethylene terephthalate sheet (PET sheet) the combined type material substrate that combines by two variable thickness (wherein a slice thickness can be between 50～150 μ m between 15～50 μ m, another sheet) to be used as non-conductive button substrate 20 of the present invention.In the present embodiment, on described substrate 20, also be printed with button relevant font or pattern in advance, such as, but be not limited to: control pattern of the symbol of 0～9 numeral, * and # and switch or direction etc. or the like, can make the position and the function of each button of user's identification, with the ad-hoc location of directly pushing described substrate 20 to drive predetermined function corresponding to described button.And, in the pre-position of substrate 20 and be provided with plurality of opening 201,202,203.Wherein, the perforate 201 of smaller aperture due be can for an extraneous electronic installation (mobile phone etc. for example, not shown in the figures) when assembling, rely on and to go into set some reference column (not shown) on the electronic installation with described perforate 201 is directly chimeric, and can reach the effect that rapidly EL key device 2 of the present invention is assembled the precalculated position of electronic installation.And the perforate 202 of larger aperture can be to cooperate other set position of control button (for example the direction operating key is not shown in the figures) of electronic installation to design.As for, 203 of the perforates of described long and narrow arcuation can be visual sense of beauty and designing, perhaps described perforate 203 also can be really not run through substrate 20, and only is deliberately to keep its pellucidity to penetrate for light, and the effect of long and narrow arcuation perforate is visually arranged.

Described metal line layer 21 is the nearly outer rim places that roughly are looped around described substrate 20 with a prespecified geometric.Wherein, the material of metal line layer 21 can be gold, silver, copper, nickel, aluminium or its alloy, and relies on printing process to be formed on the substrate 20.In this preferred embodiment, described metal line layer 21 is to use silver slurry electrically conductive ink to print out silver-colored line on substrate 20 to constitute preferable.With shown in Figure 4, the described prespecified geometric of described metal line layer 21 is to include as Fig. 3-1: show greatly a U font structure ring reach the standard grade around one of bottom of substrate 20 and the nearly outer rim of two sides place layer portion 213, show at least two electrode contacts 211,212 that roll off the production line layer portion 214 and be positioned at the nearly upper limb place of substrate 20 that an inverted T-shape structure is positioned at the nearly lower edge of substrate 20 greatly.Wherein, being combined in of described upper and lower line layer portion 213,214 is the side projection profile of a similar goblet in shape substantially.And, in described two electrode contacts 211,212 electrode contact 211 wherein being arranged is directly to be connected on the metal line layer 21,212 of another electrode contacts and metal line layer 21, carbon line layer 23, conductive layer 25, directly is not connected with luminescent layer 25 but is connected on the silver-colored backing layer 28 of back conductive module.

Then, shown in Fig. 3-2, a transparent insulating layer 22 is printed on the described metal line layer 21.Described transparent insulating layer 22 is to cover a predetermined light-emitting zone at least and is more to be provided with to comprise: plurality of opening 221 and circuit fluting 222.Described transparent insulating layer 22 is constituted with insulation material or dielectric material.The position of described perforate 221 is then corresponding with the perforate 201 of substrate 20, and each hole internal diameter of perforate 221 is to be slightly larger than described perforate 201 (its detailed functions will illustrate in white dielectric layer 26).In addition, the position of described circuit fluting 222 and shape are proper described prespecified geometrics corresponding to metal line layer 21, but the width of described circuit fluting 222 then is slightly less than the line width of described metal line layer 21, makes that the circuit that has only described metal line layer 21 can be revealed.Rely on the setting of described transparent insulating layer 22, can avoid described metal line layer 21 in follow-up printing process, cause the bad or phenomenon of short circuit of circuit turn-on because of dust fall or adhering to of other electrically conductive particles.

Afterwards, shown in Fig. 3-3, a carbon line layer 23 is printed on the described transparent insulating layer 22.Described carbon line layer 23 is carbon line circuit that the carbonaceous conductive ink printing is constituted on transparent insulating layer 22.Be provided with position and the shape of described carbon line layer 23 are described prespecified geometric corresponding to described metal line layer 21 substantially.Because described circuit fluting 222 is penetration state, thus when carbon line layer 23 print get on after, be to make described carbon line layer 23 to slot 222 and do one with described metal line layer 21 and be electrically connected by circuit.Rely on the setting of described carbon line layer 23, can make the electric current that is applied via metal line layer 21 can more be evenly distributed on the transparency conducting layer 24, avoid current concentration in the subregion, to avoid the phenomenon of the subregion luminosity inequality in the luminescent layer 25

Come again, as shown in Figure 3-4, with printing one transparency conducting layer 24 on the described carbon line layer 23.In the present embodiment, described transparency conducting layer 24 is constituted and is more included by conducting polymer: plurality of opening 241, with two electrode breach 242,243.Described transparency conducting layer 24 is roughly to cover described predetermined light-emitting zone and directly contact with carbon line layer 23, can with from the electric current of metal line layer 21 and carbon line layer 23 fifty-fifty conducting at whole predetermined light-emitting zone.The position of described plurality of opening 241 then is corresponding to described perforate 221, and the aperture of perforate 241 is to be slightly larger than perforate 221.In addition, the position of described electrode breach 242,243 is to correspond respectively to and is to be slightly larger than described two electrode contacts 211,212, makes described two electrode contacts 211,212 directly not touch described transparency conducting layer 24 in fact.

Then, shown in Fig. 3-5, printing one luminescent layer 25 on described transparency conducting layer 24.In the described luminescent layer 25 is more to include: plurality of opening 251 and two electrode breach 252,253.Because the detailed material of this luminescent layer 25 and illumination mode are that belonging to existing and non-is technical characterictic of the present invention, so will not give unnecessary details.The position of described perforate 251 is corresponding to perforate 241, and the aperture of perforate 251 is greater than (or equaling) perforate 241 (its detailed functions will illustrate in white dielectric layer 26).As for the position that is provided with of, described two electrode breach 252,253, then be corresponding with described two electrode breach 242,243 respectively.

Then, shown in Fig. 3-6, a whiter dielectric layer 26 is printed on the described luminescent layer 25, and described white dielectric layer 26 is the predetermined light-emitting zones that cover described luminescent layer 25 at least.In this preferred embodiment, described white dielectric layer 26 is with barium titanate (Barium Titanate) or other dielectric material is constituted and be the shape that is white in color, and it more includes: plurality of opening 261 and two electrode breach 262,263.Described white dielectric layer 26 except can between forward and backward conductive module, provide a capacity effect with deposit luminescent layer 26 when luminous required moment electric power, and can be used as luminescent layer 26 white background when luminous, to reach the effect of sending stable, even and soft cold light.In addition, the position of described perforate 261 is corresponding to described perforate 251, and the aperture of perforate 261 is to be slightly less than perforate 251.So design, can make the dielectric material of inner margin portion of perforate 261 of white dielectric layer 26 to do one with perforate 221 inner margin portion on the transparent insulating layer 22 combines, and transparency conducting layer 24 and luminescent layer 25 be encapsulated in wherein, guarantee can not contact with the circuit of back conductive module.In addition, two electrode breach 262,263 the position is set, then be corresponding with described two electrode breach 252,253 respectively.

Afterwards, shown in Fig. 3-7, a carbon backing layer 27 is printed on described white dielectric layer 26 tops, and described carbon backing layer 27 is to cover but be slightly less than described white dielectric layer 26.Described carbon backing layer 27 is more to include: plurality of opening 271 and two electrode contacts 272,273.The setting of this carbon backing layer 27 is to be similar to aforesaid carbon line layer 23 on function, makes the uniform effect of CURRENT DISTRIBUTION too.The position of described perforate 271 is corresponding to perforate 261, and the aperture of perforate 271 is to be slightly larger than described perforate 261 (its detailed functions will illustrate in protective layer 29).In addition, the position of described two electrode contacts 272,273 is to correspond respectively to described two electrode otch 262,263 places, and, be to be an isolation and directly not contact between the body of described electrode contact 272 and described carbon backing layer 27, yet it can be electrically connected the electrode contact 211 of metal line layer 21 by described electrode otch 262.As for, 273 of another electrode contacts are a connecting state with described carbon backing layer 27, and can be electrically connected another electrode contact 212 of metal line layer 21 by described electrode otch 263.

Come again, shown in Fig. 3-8, on described carbon backing layer 27, printing a silver medal backing layer 28.Described silver-colored backing layer 28 is to cover but be slightly less than described carbon backing layer 27, and is more to include: plurality of opening 281 and two electrode contacts 282,283.In the present embodiment, described silver-colored backing layer 281 is to rely on silver to be starched electrically conductive ink to be printed on the carbon backing layer 27 and to constitute, and it can be used to increase the capacitance of storage of described carbon backing layer 27 and white dielectric layer 26.Yet described silver-colored backing layer 28 also can be other metal material or otherwise attached on the carbon backing layer 27.The position of described perforate 281 is corresponding to described perforate 271 places, and the aperture of perforate 281 is to be slightly larger than perforate 271 (its detailed functions will illustrate in protective layer 29).The position of described two electrode contacts 282,283 is to correspond respectively to described electrode contact 272,273 places, and be to be an isolation and directly not contact between the body of described electrode contact 282 and silver-colored backing layer 28, yet another electrode contact 283 is a connecting state with the body of silver-colored backing layer 28.

At last, shown in Fig. 3-9, on described silver-colored backing layer 28, print a protective layer 29, and obtain EL key device of the present invention 2 finished products shown in Fig. 3-10.Described protective layer 29 is to cover the scope of aforementioned each layer and have bigger outer margin contour relatively; make the outer rim of protective layer 29 come down to directly overlay the outer rim of substrate 20, so can be with described back conductive module, white dielectric layer 26, luminescent layer 25, and preceding conductive module is whole is coated between protective layer 29 and the substrate 20.In the present embodiment; described protective layer 29 is with the usefulness that isolated electric power (also i.e. insulation) can be provided and can avoid the protection printing ink of inner conductive metal material oxidation to be used as encapsulating, and is more to include: plurality of opening 291 and two electrode otch 292,293.The position of described perforate 291 is corresponding to perforate 281 places; and the aperture of perforate 291 is less than perforate 281; can make protective layer 29 perforate 291 inner margin portion protection (insulation) material can and white dielectric layer 26 on perforate 261 inner margin portion do a combination; and carbon backing layer 27 and silver-colored backing layer 28 be encapsulated in wherein, guarantee can not contact with the circuit of preceding conductive module.The position of two electrode otch 292,293 is corresponding respectively and is slightly less than described two electrode contacts 282,283, makes that described two electrode contacts 282,283 can be for being connected with transmission current with the external circuitry (not shown).

In sum, EL key device of the present invention and manufacture method thereof are compared in prior art and can be had following advantages:

(1) substrate 20 of the present invention is to adopt non-conductive, relatively hard, suitably bending but not extending Hard PC plate made, it fits the EL key dress of producing one being taken as that button uses Put 2, make the present invention can have that more traditional existing backlight module thickness is thinner, cost is lower and more can and by The effects such as single structure that key itself directly is combined into one.

(2) the present invention is by means of set up respectively carbon line layer 23 and carbon backing layer on metal line layer 21 and silver-colored backing layer 28 27, can make the CURRENT DISTRIBUTION that applies more even.

(3) the present invention has circuit fluting 222 by means of set up one between metal line layer 21 and carbon line layer 23 Transparent insulating layer 22, can avoid the circuit turn-on that causes because of dust fall or other electrically conductive particles bad or short circuit existing Resemble.

(4) the present invention relies on the mode at luminescent layer 25 printings one white dielectric layer 26, and an electric capacity can be provided Required moment electric power when effect is luminous with deposit luminescent layer 25, and can be used as luminescent layer 25 white when luminous Background.

More than explanation is for the purpose of the present invention just illustrative, and nonrestrictive, those of ordinary skills Understand, in the situation that does not break away from the spirit and scope that claim limits, can make many modifications, variation Or equivalence, but but all will fall within the claim restricted portion of the present invention.

Claims

1. EL key device includes:

One button substrate is by the insulation material is constituted;

Conductive module before one is on the surface attached to substrate;

One carbon line layer covers on the described metal line layer; With

2. EL key device according to claim 1 is characterized in that: described metal line layer is for relying on printing process to be formed on the substrate gold, silver, copper, nickel, aluminium or its alloy; And the shape of described carbon line layer is to be same as described metal line layer shape; In addition, between described carbon line layer and described metal line layer, more be provided with a transparent insulating layer, described transparent insulating layer is to cover described light-emitting zone at least, and be to be provided with the circuit fluting that is same as described metal line layer shape corresponding to the metal line layer part on described transparent insulating layer, the carbon line layer is slotted by described circuit with metal line layer and is electrically connected.

3. EL key device according to claim 1 is characterized in that: the shape of described metal line layer is to include: with a U font structure ring reach the standard grade around one of bottom of substrate and the nearly outer rim of two sides place a layer portion, be positioned at least two electrode contacts that roll off the production line layer portion and be positioned at the nearly upper limb place of substrate of the nearly lower edge of substrate with an inverted T-shape structure; Wherein, described upper and lower line layer portion is at the side projection profile that is a similar goblet in shape; And one of them is arranged in described two electrode contacts is directly to be connected metal line layer, and another electrode contact then is to connect the back conductive module.

4. EL key device according to claim 1 is characterized in that: described EL key device more includes:

And described back conductive module is more to include:

5. EL key device according to claim 1, it is characterized in that: be to be printed with button relevant font or pattern on described substrate, and the material of described substrate be following wherein one: hard PC plate, rubber, silicon rubber or the combined type material substrate that is combined by the polyethylene terephthalate sheet of two variable thickness.

6. EL key device, it includes:

One button substrate is that the insulation material constitutes;

Conductive module before one is on the surface attached to substrate;

7. EL key device according to claim 6, it is characterized in that: between described transparent insulating layer and described transparency conducting layer, more be provided with a carbon line layer, the shape of described carbon line layer is to be same as described metal line layer shape, and described carbon line layer is electrically connected by described circuit fluting with metal line layer; In addition, be to be printed with button relevant font or pattern on described substrate, and the material of described substrate be following wherein one: hard PC plate, rubber, silicon rubber or the combined type material substrate that is combined by the polyethylene terephthalate sheet of two variable thickness.

8. EL key device according to claim 6 is characterized in that: the shape of described metal line layer is to include: with a U font structure ring reach the standard grade around one of bottom of substrate and the nearly outer rim of two sides place a layer portion, be positioned at least two electrode contacts that roll off the production line layer portion and be positioned at the nearly upper limb place of substrate of the nearly lower edge of substrate with an inverted T-shape structure; Wherein, described upper and lower line layer portion is at the side projection profile that is a similar goblet in shape; And, have in described two electrode contacts wherein one be directly to be connected metal line layer, another electrode contact then is directly to be connected the back conductive module.

9. EL key device according to claim 6 is characterized in that: described EL key device more includes:

And described back conductive module is more to include:

10. the manufacture method of an EL key device includes the following step:

11. the manufacture method of EL key device according to claim 10 is characterized in that: between step (A) and step (B), more include the following step:

12. the manufacture method of EL key device according to claim 10 is characterized in that: the step of conductive module is more to include after the described formation of step (F):

13. the manufacture method of EL key device according to claim 10 is characterized in that: the shape of described metal line layer is to include: with a U font structure ring reach the standard grade around one of bottom of substrate and the nearly outer rim of two sides place a layer portion, be positioned at least two electrode contacts that roll off the production line layer portion and be positioned at the nearly upper limb place of substrate of the nearly lower edge of substrate with an inverted T-shape structure; Wherein, described upper and lower line layer portion is at the side projection profile that is a similar goblet in shape; And, have in described two electrode contacts wherein one be directly to be connected metal line layer, another electrode contact then is directly to be connected the back conductive module.

14. the manufacture method of EL key device according to claim 10, it is characterized in that: be to be printed with button relevant font or pattern on described substrate, and the material of described substrate be following one of them: hard PC plate, rubber, silicon rubber or the combined type material substrate that is combined by the polyethylene terephthalate sheet of two variable thickness.