CN101193472A - EL film sheet and its making method, and mobile phone keyboard with this film sheet - Google Patents
EL film sheet and its making method, and mobile phone keyboard with this film sheet Download PDFInfo
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- CN101193472A CN101193472A CNA200610156973XA CN200610156973A CN101193472A CN 101193472 A CN101193472 A CN 101193472A CN A200610156973X A CNA200610156973X A CN A200610156973XA CN 200610156973 A CN200610156973 A CN 200610156973A CN 101193472 A CN101193472 A CN 101193472A
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Abstract
The invention discloses an inorganic electroluminescence (EL) diaphragm, a manufacture method and a mobile phone keyboard formed thereof. The diaphragm consists of a transparent substrate, a transparent conducting layer, a bus bar, an emitting layer, a dielectric layer, a back electrode layer and an insulating layer. By adopting the method for screen-printing the polymeric transparent conducting layer on the transparent and flexible diaphragm substrate, a novel transparent electrode is formed to replace a traditional conductive film of poly ethylene terephthalate / indium tin oxide (PET/ITO). The method reduces the thickness of the EL diaphragm and significantly improves the flexibility of the EL diaphragm. As for the mobile phone keyboard made of the EL diaphragm, a whole piece of the EL diaphragm adheres to a circuit board with an arched metal shrapnel. As the ultra-thin and flexible EL diaphragm hardly affects feeling of key, openwork process is not required on the metal shrapnel. Therefore, the invention provides backlight for the mobile phone keyboard with a good feeling of key, thin thickness and even luminescence.
Description
Technical field
The present invention relates to a kind of EL (inorganic EL) diaphragm, its manufacture method, and with the keypad for cellular phone of its formation.
Technical background
The keyboard back light of existing mobile phone, most of LED that adopts is as light-emitting component, and the light source that the LED lamp forms is installed in the bottom of button.The LED key-press backlight has the shortcoming of brightness irregularities, manage to address this problem, and must increase the quantity of LED, and shape and weight will increase greatly like this, and the LED consumed power is big, and the battery consumption of mobile phone is fast, thereby can't use for a long time.The LED lamp body is long-pending bigger in addition, need take than large space, causes the button integral thickness to increase.
Because electroluminescence (EL) element is the area source of sheet, thin thickness is luminous evenly, and power consumption is minimum.For solving the above-mentioned problem of mentioning, people have expected replacing the LED element as the key-press backlight source with EL element.
EL sheet essence is a capacitor, has dielectric layer between two cube electrodes, and wherein there is luminescent layer in a cube electrode printing opacity between transparent electrode layer and the dielectric layer.Electrode is applied AC power, so that phosphor is luminous.
The inorganic EL sheet has layer structure; typically; on transparent base, form transparent indium tin oxide (ITO) electrode with vacuum splashing and plating; form first dielectric layer, inorganic light-emitting layer, second dielectric layer and back electrode, insulating barrier successively with silk screen printing on the ITO electrode, insulating barrier generally has defencive function concurrently.Wherein first dielectric layer is not essential, according to situation can, as shown in Figure 1.
Present EL sheet, typically having thickness is the polyester transparent base material of 75-125 μ m, monoblock EL sheet thickness reaches 180-230 μ m.Though the even power consumption of its illumination is little, its substrate is thick and hard, and the EL sheet has influenced the sense of touch of button greatly.In order to address this problem, usually at corresponding metal clips place with EL sheet hollow out, as shown in Figure 3, but this has influenced the uniformity of key-press backlight again.
These factors have limited the application of EL element on mobile phone key is backlight to a great extent.
Summary of the invention
The present invention is exactly the above-mentioned problem that has the EL diaphragm now in order to solve, and proposes a kind of flexible EL diaphragm and preparation method thereof, and the keypad for cellular phone that comprises this diaphragm.
For this reason, EL diaphragm of the present invention comprises transparent base, be formed on transparency conducting layer also on the transparent base, be formed on the preceding electrode converging bar on the transparent preceding electrode that constitutes by transparent base and transparency conducting layer, be formed on the luminescent layer on transparent preceding electrode and the busbar, be formed on the dielectric layer on the luminescent layer, be formed on the back electrode on the dielectric layer, be formed on the back electrode busbar on the back electrode, be formed on the insulating barrier on back electrode and the busbar, it is characterized in that: described transparent base is the transparent flexible film substrate, and described transparency conducting layer is the macromolecule transparency conducting layer.
According to embodiments of the invention, EL film of the present invention can also comprise following feature:
Described macromolecule transparency conducting layer is that the method for silk screen printing macromolecule transparency conducting layer on the transparent flexible film forms.
Resin glue is the high-k flexible resin(a) in luminescent layer and the dielectric layer.
The flexible resin glue of described high-k is cyanogen resin, fluororesin, for example one or more in polyvinyl alcohol cyanoethyl ether, cyanoethyl candy, cyanethyl cellulose, polyvinylidene fluoride, the polytetrafluoroethylene.
Electroluminescent powder is one or more in coating luminescent powder, the non-coating luminescent powder in the luminescent layer, and dielectric layer medium powder is BaTiO3 powder and/or TiO2 powder.
The manufacture method of EL sheet of the present invention comprises the steps: A, on base material the printing transparent conductive layer, form transparent before electrode; B, the slurry that will contain electroluminescent powder, binding agent be printed on described transparent before on the electrode, form luminescent layer; C, the slurry that will contain medium powder, binding agent are printed on the described luminescent layer, form dielectric layer; D, on dielectric layer, print back electrode; And E, on back electrode, print insulating barrier.
According to embodiments of the invention, method of the present invention can also comprise following feature: carry out drying after each printing.
The keypad for cellular phone of the EL of having diaphragm of the present invention comprises the wiring board with arch metal clips, it is characterized in that, also comprise described EL diaphragm, this diaphragm full wafer adheres on the above-mentioned wiring board with arch metal clips, and has the EL diaphragm to exist equally at the metal clips place.
The scheme advantage that the present invention proposes is as follows:
The present invention adopts the novel transparent electrode to replace traditional PET/ITO conducting film, and the method for a kind of EL of reduction sheet thickness, raising EL sheet flexibility is provided.
Replaced traditional PET base material with the transparent flexible film substrate.Fexible film has stronger ductility and anti-bending, thereby this EL diaphragm has on the irregular wiring board of arch shrapnel, can form effectively to fit tightly.And be used for the transparent flexible film of silk screen printing, thickness there is not particular restriction.Common transparent flexible film, thickness are about 40-60 μ m, greatly reduce the thickness of EL diaphragm integral body.Thereby the new E L diaphragm between button silica gel and metal clips, little to the influence of button sense of touch.
The ITO transparency conducting layer that the macromolecule transparency conducting layer that silk screen printing forms has replaced traditional vacuum sputtering to form.Silk screen printing is compared with vacuum sputtering, has reduced cost, has simplified technology, can form the conduction region of arbitrary graphic.The more important thing is, the very easily embrittlement under the situation of bending of ITO film, and the novel transparent conductive layer is a polymeric film structure, has good bend resistance, stretch-proof performance.Guaranteed the function of flexible EL diaphragm, be not damaged because of alteration of form.
Luminescent layer and dielectric layer adopt the high-k flexible resin(a), thereby can make effectively luminous acquisition high brightness of luminescent powder as far as possible.This resin has high-k, has effectively increased the brightness of EL diaphragm.And the employing of this flexible resin(a) also makes diaphragm present flexible characteristic.
The keypad for cellular phone that adopts above-mentioned EL diaphragm to constitute is backlight, and EL diaphragm monoblock adheres on arch metal clips and the wiring board.Because ultrathin flexible EL diaphragm influences the button sense of touch hardly, do not need as traditional key-press backlight EL sheet, carry out hollow out at the metal clips place and handle.
As mentioned above, it is even to the invention provides a kind of illumination, and brightness is higher, and ultrathin flexible does not influence the mobile phone button EL film backlight of button sense of touch.
Description of drawings
Fig. 1 is the EL sheet profile that makes up according to prior art.
Fig. 2 is the EL sheet profile according to the method structure of the embodiment of the invention.
The key-press backlight schematic diagram that Fig. 3 is to use the EL sheet of prior art to make up.
The key-press backlight schematic diagram that Fig. 4 is to use the EL sheet of the embodiment of the invention to make up.
Embodiment
The EL diaphragm profile of prior art and EL keyboard schematic diagram backlight are seen accompanying drawing 1, Fig. 3.EL diaphragm profile that the present invention relates to and EL keyboard schematic diagram backlight are seen Fig. 2, Fig. 4.
Under the prerequisite that guarantees illumination uniformity, in order to reduce of the influence of EL sheet as far as possible, must reduce the thickness of EL diaphragm to the button sense of touch, increase the flexibility of EL diaphragm.
The present invention adopts the novel transparent electrode to replace traditional PET/ITO conducting film.Silk screen printing macromolecule electrically conducting transparent slurry on the transparent flexible film forms the novel transparent electrode.The method of a kind of EL of reduction sheet thickness, raising EL sheet flexibility is provided.
At first, replaced traditional PET (Fig. 1) base material 1a with transparent flexible film substrate 1b (Fig. 2).
From base material rerum natura angle, PET base material 1a is a fragile material, after almost can't extending, bending folding line is arranged.EL diaphragm provided by the invention adopts fexible film to make base material.Fexible film has stronger ductility and anti-bending, thereby this EL diaphragm has on the irregular wiring board of arch shrapnel, can form effectively to fit tightly.
From the base material thickness angle, be used for the PET transparent base of vacuum sputtering ITO, because technology is limit, thickness is generally between 75-125 μ m; And be used for the transparent flexible film of silk screen printing, thickness there is not particular restriction.Common transparent flexible film, thickness are about 40-60 μ m, greatly reduce the thickness of EL diaphragm integral body.Thereby the new E L diaphragm between button silica gel and metal clips, little to the influence of button sense of touch.
Secondly, the macromolecule transparency conducting layer 2b that silk screen printing forms, the ITO transparency conducting layer 2a that has replaced traditional vacuum sputtering to form.
Silk screen printing is compared with vacuum sputtering, has reduced cost, has simplified technology, can form the conduction region of arbitrary graphic.The more important thing is, the very easily embrittlement under the situation of bending of ITO film, and the novel transparent conductive layer is a polymeric film structure, has good bend resistance, stretch-proof performance.Guaranteed the function of flexible EL diaphragm, be not damaged because of alteration of form.
In addition, thus in order to make effectively luminous acquisitions high brightness of luminescent powder, luminescent layer and dielectric layer employing high-k flexible resin(a) as far as possible.This resin has high-k, has effectively increased the brightness of EL diaphragm.And the employing of this flexible resin(a) also makes diaphragm present flexible characteristic.
The keypad for cellular phone that adopts above-mentioned EL diaphragm to constitute is backlight, and EL diaphragm monoblock adheres on arch metal clips 8 and the wiring board 7.Because ultrathin flexible EL diaphragm 9b influences the button sense of touch hardly, do not need as traditional key-press backlight EL sheet 9a, carry out hollow out 10 at the metal clips place and handle.
As mentioned above, it is even to the invention provides a kind of illumination, and brightness is higher, and ultrathin flexible does not influence the mobile phone button EL film backlight of button sense of touch.
Be further described below in conjunction with the EL diaphragm of accompanying drawing present embodiment.
Fig. 2 is the electroluminescence diaphragm profile that the present invention relates to.This EL diaphragm is a layer structure.Have the macromolecule transparency conducting layer 2b (transparent base and transparency conducting layer constitute transparent preceding electrode), luminescent layer 3, dielectric layer 4, dorsum electrode layer 5, the insulating barrier 6 that are formed on successively on the transparent flexible film 1b, wherein transparent base and transparency conducting layer constitute transparent preceding electrode.Before transparent, form busbar (not marking on the figure) on electrode, the back electrode.Busbar is generally formed by silver/carbon slurry, is the lines shape, and electrode, back electrode are distinguished the extraction electrode head in the past, play the effect that compiles electric current.
Wherein, the material of transparent flexible film of the present invention has no particular limits, can adopt various film known to a person of ordinary skill in the art, for example polyvinyl chloride (PVC), thermoplastic polyurethane (TPU), polypropylene (PP) etc. are preferably thermoplastic polyurethane (TPU) film.The thickness preferable range 12-60 micron of described transparent flexible film.
Macromolecule conducting material in the macromolecule transparency conducting layer of the present invention has no particular limits, can adopt the various materials that can be used as transparency electrode known to a person of ordinary skill in the art, for example polyaniline (PANI), poly-dioxoethyl thiophene (PEDOT), polyphenylacetylene (PPV) etc. are preferably poly-dioxoethyl thiophene (PEDOT).
The material of the described electroluminescent powder in the luminescent layer 3 of the present invention has no particular limits, can adopt the various materials that can be used as electroluminescent powder known to a person of ordinary skill in the art, for example one or more in coating such as Zn:Cu, ZnS:Mn luminescent powder, the non-coating luminescent powder are preferably the coating luminescent powder.25 to 35 microns of the granularity preferable range of described electroluminescent powder.
The material of the described medium powder in the dielectric layer 4 of the present invention has no particular limits, can adopt the various materials that can be used as medium powder known to a person of ordinary skill in the art, for example BaTiO3 powder and/or TiO2 powder, preferably use the BaTiO3 powder, because the dielectric constant of BaTiO3 is higher.The granularity preferable range of described medium powder is 0.5 to 1 micron.
The flexible resin glue of high-k described in the present invention is preferably cyanogen resin, fluororesin, for example one or more in polyvinyl alcohol cyanoethyl ether, cyanoethyl candy, cyanethyl cellulose, polyvinylidene fluoride, the polytetrafluoroethylene are preferably polyvinylidene fluoride resin.Adopt the purpose of high-k flexible resin(a) to be, in bonding electroluminescent powder and medium powder, make EL sheet have higher luminosity and better bending performance.
Electrode, back electrode busbar rise and compile the function of current before described, can be the known suitable electrode of any those skilled in the art, for example silver-colored line, carbon line etc.
Described back electrode 5 can be the known suitable electrode of any those skilled in the art, for example silver slurry, carbon slurry etc.Described back electrode 5 can be a different shape according to practical situations.
Described insulating barrier 6 can be the known suitable dielectric ink of any those skilled in the art, for example ultraviolet light polymerization dielectric ink, hot curing dielectric ink.
Above-mentioned EL diaphragm is applied to the mobile phone key-press backlight, its monoblock is sticking attached on the circuit board 7 that has arch metal clips 8, by the EL drive circuit on the circuit board, between transparent electrode layer and dorsum electrode layer, apply alternating voltage, thereby make the luminescent powder of luminescent layer luminous, form the key-press backlight source of mobile phone.
Its manufacture method is summarized as follows:
The manufacture method of EL sheet provided by the present invention is included in transparent flexible film substrate 1b and goes up silk screen printing macromolecule transparency conducting layer 2b; Wherein, this method comprises that also the slurry that will contain electroluminescent powder, binding agent is coated on the conductive layer to form luminescent layer 3; The slurry that will contain medium powder, binding agent is coated on the luminescent layer to form dielectric layer 4; On dielectric layer 4, apply back electrode 5; And on back electrode 5, be coated with insulating layer coating 6.
Wherein, the described slurry that contains electroluminescent powder, binding agent, the weight ratio of binding agent and electroluminescent powder is 1: 0.5-3 is preferably 1: 1.0-2.0.Solvent can be in your ketone of dimethyl formamide, dimethylacetylamide, cyclohexanone, different fluorine one or more.Amount of solvent is 0-30 weight %, is preferably 2.5-20 weight %.
The described slurry that contains medium powder, binding agent.The weight ratio of binding agent and medium powder is 1: 0.2-3.0 is preferably 1: 0.8-2.0.Solvent can be in your ketone of dimethyl formamide, dimethylacetylamide, cyclohexanone, different fluorine one or more.Amount of solvent is 0-30 weight %, is preferably 2.5-20 weight %.
Described coating can be adopted the known any coating method of those skilled in the art, and for example rotation coating, silk screen printing etc. are preferably silk screen printing.Carry out drying after each the coating, described drying can adopt the known any drying mode of those skilled in the art, for example far infrared baking, and the temperature when dry is 50-150 ℃, is preferably 70-130 ℃, can be set as required drying time by those skilled in the art.
In addition, before printing, before the electrode, can carry out dedusting, surface preparation to substrate layer 1.Dedusting can be adopted conventional dust collection method, for example electrostatic dedusting roller.Surface preparation can be adopted conventional surface treatment method, for example uses toluene/even wiping of acetone mixed liquor.
Be the embodiment of a concrete manufacture method below:
At first, be the TPU film of 40 μ m to thickness, carry out surface preparation.With toluene/even wiping of acetone mixed liquor.Then carry out following silk-screen operation successively.
On the TPU film of handling, silk screen printing PEDOT electrically conducting transparent slurry in 80 ℃ of dryings 20 minutes, forms transparency conducting layer.
On the PEDOT transparency electrode, silk screen printing silver slurry, in 80 ℃ of dryings 60 minutes, electrode converging bar before forming.
With coating luminescent powder and polyvinylidene fluoride binding agent, press mass ratio and mix at 1.8: 1, add 20%wt dimethyl formamide (DMF) solvent again, be uniformly dispersed, make the luminescent layer slurry.
On transparency electrode and busbar, silk screen printing luminescent layer slurry then 80 ℃ of dryings 90 minutes, forms luminescent layer.
Barium titanate powder and polyvinylidene fluoride binding agent are pressed mass ratio mixing in 1.5: 1, add 20%wt dimethyl formamide (DMF) solvent again, be uniformly dispersed, make the dielectric layer slurry.
On luminescent layer, the silk screen printing dielectric paste, in 80 ℃ of dryings 30 minutes, printing, drying were printed 3 times altogether once more, formed dielectric layer.
Silk screen printing carbon slurry in 80 ℃ of dryings 60 minutes, forms dorsum electrode layer.
Silk screen printing silver slurry in 80 ℃ of dryings 60 minutes, forms the back electrode busbar.
Last silk screen printing UV dielectric ink, the UV photocuring forms insulating barrier.
Behind the EL diaphragm that completes, placed one day, the above EL diaphragm that makes is carried out thickness, flexible test.
The thickness measuring result shows that this EL diaphragm gross thickness is about 100 μ m.Bend test according to the ATSMF1683-05 standard.The result shows that the anti-bending performance of this EL diaphragm is good, and the EL diaphragm does not have obvious folding line, luminous normal free from flaw.
Claims (8)
1. EL diaphragm, comprise transparent base, be formed on the transparent base and transparency conducting layer, be formed on by transparent base and transparency conducting layer constitute transparent before on the electrode preceding electrode converging bar, be formed on transparent before on electrode and the busbar luminescent layer, be formed on dielectric layer on the luminescent layer, be formed on back electrode on the dielectric layer, be formed on back electrode busbar on the back electrode, be formed on the insulating barrier on back electrode and the busbar, it is characterized in that: described transparent base is the transparent flexible film substrate, and described transparency conducting layer is the macromolecule transparency conducting layer.
2. EL diaphragm as claimed in claim 1 is characterized in that, described macromolecule transparency conducting layer is that the method for silk screen printing macromolecule transparency conducting layer on the transparent flexible film forms.
3. EL diaphragm as claimed in claim 1 or 2 is characterized in that, resin glue is the high-k flexible resin(a) in luminescent layer and the dielectric layer.
4. EL diaphragm as claimed in claim 3, it is characterized in that: the flexible resin glue of described high-k is cyanogen resin, fluororesin, for example one or more in polyvinyl alcohol cyanoethyl ether, cyanoethyl candy, cyanethyl cellulose, polyvinylidene fluoride, the polytetrafluoroethylene.
5. EL diaphragm as claimed in claim 1 or 2 is characterized in that, electroluminescent powder is one or more in coating luminescent powder, the non-coating luminescent powder in the luminescent layer, and dielectric layer medium powder is BaTiO
3Powder and/or TiO
2Powder.
6. the manufacture method of an EL diaphragm is characterized in that comprising the steps:
A, go up printing transparent conductive layer (2b), forms transparent preceding electrode at base material (1b);
B, the slurry that will contain electroluminescent powder, binding agent be printed on described transparent before on the electrode, form luminescent layer (3);
C, the slurry that will contain medium powder, binding agent are printed on the described luminescent layer (3), form dielectric layer (4);
D, go up printing back electrode (5) at dielectric layer (4); And
E, go up printing insulating barrier (6) at back electrode (5).
7. the manufacture method of EL diaphragm according to claim 6 is characterized in that, carries out drying after each printing.
8. keypad for cellular phone with described EL diaphragm of arbitrary claim among the claim 1-5, comprise wiring board with arch metal clips, it is characterized in that, also comprise described EL diaphragm, this diaphragm full wafer adheres on the above-mentioned wiring board with arch metal clips, and has the EL diaphragm to exist equally at the metal clips place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610156973XA CN101193472B (en) | 2006-11-20 | 2006-11-20 | EL film sheet and its making method, and mobile phone keyboard with this film sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610156973XA CN101193472B (en) | 2006-11-20 | 2006-11-20 | EL film sheet and its making method, and mobile phone keyboard with this film sheet |
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| Publication Number | Publication Date |
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| CN101193472A true CN101193472A (en) | 2008-06-04 |
| CN101193472B CN101193472B (en) | 2011-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200610156973XA Expired - Fee Related CN101193472B (en) | 2006-11-20 | 2006-11-20 | EL film sheet and its making method, and mobile phone keyboard with this film sheet |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102176298A (en) * | 2010-01-26 | 2011-09-07 | 上海科炎光电技术有限公司 | Matrix electroluminescent flat-panel display |
| CN102316619A (en) * | 2011-08-08 | 2012-01-11 | 芜湖日昇昌新光源科技有限公司 | Method for manufacturing large-area electro energy-saving cold light film |
| WO2016095428A1 (en) * | 2014-12-15 | 2016-06-23 | 京东方科技集团股份有限公司 | Flexible electrode structure and manufacturing method therefor, and flexible display substrate |
| CN107403583A (en) * | 2016-05-20 | 2017-11-28 | 捷尔革科技股份有限公司 | Electroluminescent transfer-type paster and can electroluminescent transfer label |
| CN108697000A (en) * | 2018-06-06 | 2018-10-23 | 浙江大学山东工业技术研究院 | A kind of printing method of the high-precision silk screen printing electrode based on elastic substrates |
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| CN109270761A (en) * | 2018-09-14 | 2019-01-25 | 上海洞舟实业有限公司 | A kind of flexibility hot melt glue type all-solid-state flexible electrochromic device |
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| CN110267406A (en) * | 2019-06-27 | 2019-09-20 | 湖南纳昇印刷电子科技有限公司 | A kind of ultrathin flexible EL sheet and preparation method thereof |
| CN110267405A (en) * | 2019-06-21 | 2019-09-20 | 广东彩乐智能包装科技有限公司 | A kind of all print electroluminescent device and preparation method thereof |
| US10720289B1 (en) | 2019-02-20 | 2020-07-21 | Darfon Electronics Corp. | Light emitting keyboard and lighting board thereof |
| CN112820835A (en) * | 2020-12-31 | 2021-05-18 | 湖南鼎一致远科技发展有限公司 | Electroluminescent device of PVC (polyvinyl chloride) base material and preparation method |
| CN114071906A (en) * | 2020-08-04 | 2022-02-18 | Oppo广东移动通信有限公司 | Shell assembly, preparation method thereof, method for driving shell assembly to emit light and electronic device |
| CN114340073A (en) * | 2021-12-30 | 2022-04-12 | 湖南鼎一致远科技发展有限公司 | Double-sided light-emitting electroluminescent film, preparation method and electroluminescent signboard |
| US11307431B2 (en) | 2018-02-27 | 2022-04-19 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Laser projection modules and methods for detecting fracture thereof, depth cameras and electronic devices |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2772339B2 (en) * | 1994-11-30 | 1998-07-02 | セイコープレシジョン株式会社 | Color EL display device |
| US20040119400A1 (en) * | 2001-03-29 | 2004-06-24 | Kenji Takahashi | Electroluminescence device |
-
2006
- 2006-11-20 CN CN200610156973XA patent/CN101193472B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102176298A (en) * | 2010-01-26 | 2011-09-07 | 上海科炎光电技术有限公司 | Matrix electroluminescent flat-panel display |
| CN102316619A (en) * | 2011-08-08 | 2012-01-11 | 芜湖日昇昌新光源科技有限公司 | Method for manufacturing large-area electro energy-saving cold light film |
| WO2016095428A1 (en) * | 2014-12-15 | 2016-06-23 | 京东方科技集团股份有限公司 | Flexible electrode structure and manufacturing method therefor, and flexible display substrate |
| CN107403583A (en) * | 2016-05-20 | 2017-11-28 | 捷尔革科技股份有限公司 | Electroluminescent transfer-type paster and can electroluminescent transfer label |
| CN109812781B (en) * | 2017-11-21 | 2021-04-20 | 黄鸣 | Luminescent glass structure and forming method thereof |
| CN109812781A (en) * | 2017-11-21 | 2019-05-28 | 黄鸣 | Fluorescent glass structure and forming method thereof |
| US11307431B2 (en) | 2018-02-27 | 2022-04-19 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Laser projection modules and methods for detecting fracture thereof, depth cameras and electronic devices |
| CN108697000A (en) * | 2018-06-06 | 2018-10-23 | 浙江大学山东工业技术研究院 | A kind of printing method of the high-precision silk screen printing electrode based on elastic substrates |
| CN109212827A (en) * | 2018-08-31 | 2019-01-15 | 深圳市华星光电技术有限公司 | A kind of flexibility LCD and preparation method thereof |
| CN109270761A (en) * | 2018-09-14 | 2019-01-25 | 上海洞舟实业有限公司 | A kind of flexibility hot melt glue type all-solid-state flexible electrochromic device |
| CN109270761B (en) * | 2018-09-14 | 2021-09-03 | 上海洞舟实业有限公司 | Flexible hot melt adhesive type all-solid-state flexible electrochromic device |
| US10720289B1 (en) | 2019-02-20 | 2020-07-21 | Darfon Electronics Corp. | Light emitting keyboard and lighting board thereof |
| CN110267405A (en) * | 2019-06-21 | 2019-09-20 | 广东彩乐智能包装科技有限公司 | A kind of all print electroluminescent device and preparation method thereof |
| CN110267406A (en) * | 2019-06-27 | 2019-09-20 | 湖南纳昇印刷电子科技有限公司 | A kind of ultrathin flexible EL sheet and preparation method thereof |
| CN114071906A (en) * | 2020-08-04 | 2022-02-18 | Oppo广东移动通信有限公司 | Shell assembly, preparation method thereof, method for driving shell assembly to emit light and electronic device |
| CN114071906B (en) * | 2020-08-04 | 2023-07-18 | Oppo广东移动通信有限公司 | Shell assembly, manufacturing method thereof, method for driving shell assembly to emit light and electronic equipment |
| CN112820835A (en) * | 2020-12-31 | 2021-05-18 | 湖南鼎一致远科技发展有限公司 | Electroluminescent device of PVC (polyvinyl chloride) base material and preparation method |
| CN114340073A (en) * | 2021-12-30 | 2022-04-12 | 湖南鼎一致远科技发展有限公司 | Double-sided light-emitting electroluminescent film, preparation method and electroluminescent signboard |
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