CN103631038A - Silk screen optical filter - Google Patents
Silk screen optical filter Download PDFInfo
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- CN103631038A CN103631038A CN201310594944.1A CN201310594944A CN103631038A CN 103631038 A CN103631038 A CN 103631038A CN 201310594944 A CN201310594944 A CN 201310594944A CN 103631038 A CN103631038 A CN 103631038A
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- silk screen
- optical filter
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- screen optical
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Abstract
The invention discloses a silk screen optical filter which comprises first protective glass, second protective glass and a silk screen arranged between the first protective glass and the second protective glass. The silk screen is a metal wire mesh etched on a TAC substrate, and the surface of the metal wire mesh is sequentially plated with a copper layer and a nickel layer. By means of the silk screen optical filter, the transmittance of the silk screen can be improved by 10%, the reflection coefficient of a displayer module mirror surface is reduced to 0.7%, and the diffuse reflection coefficient is reduced to 0.5%. The silk screen optical filter is good in transmittance, high in optical energy utilization rate, good in use safety and strong in shielding performance.
Description
Technical field
The present invention relates to electron device, be specifically related to a kind of silk screen optical filter being loaded on liquid crystal display front end.
Background technology
In a lot of applications, electromagnetic Compatibility Design is one of leading indicator of electronic device design always, airborne liquid crystal display must have good Electro Magnetic Compatibility as bubble head parts important in airborne, and good EMC Design can effectively improve security, stability and the reliability of equipment.
In order to reach good effectiveness, be chosen in liquid crystal display front end in the past and install one additional and have layer glass and wire gauze to form silk screen optical filter window glass; Then the wire gauze leaking outside by window glass surrounding snaps in the metal construction of display, thereby form the conductor chamber of sealing around at display module, this silk screen optical filter window glass, when playing effectiveness, has reduced the mechanical damages such as the vibrated and shock of liquid crystal display mode.
But, because wire gauze is guaranteeing that under the condition of certain electromagnet shield effect and good physical strength, it is very thin that the string diameter of wire gauze cannot be done, so silk screen window glass aperture opening ratio is less, transmitance is low, and this just causes the efficiency of light energy utilization of LCD MODULE to reduce.
And wire gauze window glass is installed at the front end of LCDs, cause LCD MODULE surface reflectance high, general specularity factor 1.5% left and right, diffuse-reflection factor 2.0% left and right.Higher surface reflection causes LCD MODULE bright ring border contrast in strong illumination situation to decline, affect user's observing effect, particularly airborne indicator has a strong impact on pilot to showing the quick obtaining of information when the bright environmental work in high-altitude, affects flight safety.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide that a kind of transmitance is good, the efficiency of light energy utilization is high, safety in utilization is good, and the strong silk screen optical filter of shielding properties.
To achieve these goals, the technical solution used in the present invention is:
This silk screen optical filter; comprise the first cover glass, the second cover glass and be located at the silk screen between described the first cover glass and the second cover glass; described silk screen is the wire gauze being etched on TAC base material, on described wire gauze surface, is coated with successively copper layer and nickel dam.
Described wire gauze is the nanometer silver granuel silk screen of exposure on TAC base material.
Described copper layer and nickel dam are plated on described wire gauze surface by chemical plating method.
Between described the first cover glass and described silk screen one side and between the second cover glass and described silk screen opposite side, be respectively equipped with hot-melt film.
Described the first cover glass one side and hot-melt film contact, and described the first cover glass opposite side surface is provided with anti-reflection film.
Described anti-reflection film is broadband anti-reflection film.
Described the second cover glass one side and hot-melt film contact, and are provided with the index matching layer of gradually changed refractive index on described the second cover glass opposite side surface.
The refractive index of described the first cover glass and the second cover glass is 1.47, and the refractive index of hot-melt film is that the refractive index of 1.48, TAC base material is 1.49.
Described silk screen string diameter is 8～12 μ m.
The reflection coefficient of this silk screen optical filter is 0.7%, and diffuse-reflection factor is 0.5%.
The invention has the advantages that: first, this silk screen optical filter, silk screen is the wire gauze being etched on TAC base material, silk screen string diameter narrows down to 8～12 μ m, has solved the excessive defect in traditional chemical etch pattern silk screen point of crossing; The string diameter of conventional wire-net is generally in 14 μ m left and right, and two kinds of silk screens are under the condition of equal order number, and the novel silk screen transmitance of etch pattern TAC can promote 10%.
Secondly, on the basis of the nanometer silver granuel silk screen obtaining after exposure, adopt the mode of plated film to plate respectively one deck copper and mickel, so both increased etching silk screen electric conductivity, nickel dam has also played certain Darkening process effect simultaneously.The diffuse reflection of silk screen optical filter is mainly derived from the surface of the silk screen material of grid arrangement, and the rough surface of silk screen base material; By silk screen material surface is carried out to Darkening process, the surround lighting major part being irradiated on silk screen optical filter is absorbed by blackening layer, thereby realize, reduce the irreflexive object of silk screen optical filter, and then the display effect of raising liquid crystal display, be beneficial to pilot's quick obtaining and show information, guarantee flight safety.
Again, on the first cover glass of silk screen optical filter, plate a kind of broadband anti-reflection film of multilayer, can effectively reduce the front end reflection coefficient of liquid crystal display, and then improve the display effect of liquid crystal display; Further be beneficial to pilot's quick obtaining and show information, guarantee flight safety.
Again secondly,, at the lower surface of the lower cover glass of silk screen optical filter, plate one deck index matching layer, the refractive index of this index matching layer is gradual change, and refractive index realizes gradual transition from lower cover glass to optics bonded adhesives; Thereby promote the overall reflective performance of silk screen optical filter, effectively improved the display effect of liquid crystal display; Further be beneficial to pilot's quick obtaining and show information, guarantee flight safety.
Finally, by the various device materials of silk screen optical filter being carried out to the coupling of refractive index, by selecting optical cement and the TAC material with appropriate index, reduce the reflection of each material interface of silk screen optical filter as far as possible.Adopt the display module specularity factor of this silk screen optical filter to be reduced to 0.7%, diffuse-reflection factor 0.5%, has effectively improved the display effect of liquid crystal display, and the high light that has particularly improved LCD MODULE is readable.
Accompanying drawing explanation
The content of below each width accompanying drawing of instructions of the present invention being expressed and the mark in figure are briefly described:
Fig. 1 is the structural representation of silk screen optical filter of the present invention.
Fig. 2 is the part structure for amplifying schematic diagram of the wire gauze of silk screen optical filter of the present invention.
Fig. 3 is the part structure for amplifying schematic diagram of the wire gauze of silk screen optical filter in prior art.
Mark in above-mentioned figure is:
1, the first cover glass, 2, hot-melt film, 3, silk screen, the 4, second cover glass.
Embodiment
Contrast accompanying drawing below, the description by optimum embodiment, is described in further detail the specific embodiment of the present invention.
As shown in Figures 1 and 2; this silk screen optical filter; comprise the first cover glass 1, the second cover glass 4 and be located at the first cover glass 1 and the silk screen 3 of 4 of the second cover glasses, silk screen 3, for to be etched in the wire gauze on TAC base material, is coated with copper layer and nickel dam successively on wire gauze surface.TAC base material is TAC film (cellulose acetate membrane of lipoprotein).
As preferred version, wire gauze is the nanometer silver granuel silk screen of exposure on TAC base material.
This silk screen optical filter, silk screen 3 is for being etched in the wire gauze on TAC base material, and the shield effectiveness of silk screen optical filter can be by increasing silk screen 3 order numbers and improving silk screen 3 electric conductivity two aspects and improve.Because of the increase with silk screen 3 order numbers, the aperture opening ratio of silk screen 3 can decline thereupon, thereby causes the transmitance of silk screen 3 optical filters to reduce.Therefore this silk screen 3, by increasing the electric conductivity two aspect combinations of silk screen 3 order numbers and increase silk screen 3, guaranteeing silk screen 3 transmitances simultaneously, guarantees the better shielding properties of silk screen optical filter tool.
As preferred version, on the basis of the nanometer silver granuel silk screen obtaining after exposure, adopt the mode of plated film to plate respectively one deck copper and mickel, so both played the object that has increased etching silk screen electric conductivity, nickel dam has also played certain melanism effect simultaneously; The surround lighting major part being irradiated on silk screen optical filter is absorbed by blackening layer, thereby realize, reduces the irreflexive object of silk screen optical filter, realizes diffuse reflection anti-reflection optimization, and then improves the display effect of liquid crystal display.
Between the first cover glass 1 and silk screen one side and between the second cover glass 4 and silk screen opposite side, be respectively equipped with hot-melt film 2, by hot-melt film, silk screen 3, the first cover glass 1 and the second cover glass 4 bound together and form silk screen optical filter.
As preferred version, the first cover glass 1 one sides and hot-melt film 2 contact, and the first cover glass 1 opposite side surface is provided with anti-reflection film.According to anti-reflection principle in Film Optics, before the upper cover glass of silk screen optical filter, show to plate one deck anti-reflection film.Preferred this anti-reflection film is the broadband anti-reflection layer that the principle of employing multilayer anti-reflection film is made; At visible light wave range, there is good anti-reflection effect, and then silk screen is carried out to surperficial mirror-reflection anti-reflection optimization, and then improve the display effect of liquid crystal display.
Because silk screen optical filter need be bonded on liquid crystal display by optical cement; pretend as preferred version; lower surface at the lower cover glass of silk screen optical filter plates one deck index matching layer; the refractive index of this index matching layer is gradual change; refractive index realizes gradual transition from lower cover glass to optics bonded adhesives; reduce reflection, to realize the optimization of silk screen optical filter reflecting effect, and then the display effect of raising liquid crystal display.
According to principle of reflection, the reflection coefficient of light on two media interphase is:
r=(n1-n2)/(n1+n2) （1）
The refractive index that wherein n1 is incident medium, n2 is the refractive index of emergent medium, there is formula (1) can find out when light passes through the interphase of two media, the refractive index difference of two media is less, on this dielectric interface, reflection coefficient is less, therefore this silk screen optical filter, carries out index matching to forming the various materials of silk screen optical filter.
As preferred version, it is that the refractive index of 1.48, the first cover glasses 1 and the second cover glass 4 is 1.47 that the refractive index of the hot-melt film 2 of selecting approaches the first cover glass 1 and the second cover glass 4; Selecting refractive index is 1.49 TAC material, replace traditional PET material (refractive index 1.61) as the base material of etch pattern silk screen, to reduce the reflection coefficient on each dielectric interface of silk screen optical filter as far as possible, silk screen 3 is carried out to the optimization of reflecting effect, thereby promote the overall reflective performance of silk screen optical filter, and then improve the display effect of liquid crystal display.
The etch pattern TAC silk screen that adopts nanometer silver granuel exposure technique and chemical etch technique to make, silk screen 3 string diameters narrow down to 8～12 μ m, solve the excessive defect in traditional chemical etch pattern silk screen point of crossing, the string diameter of conventional wire-net is generally in 14 μ m left and right, two kinds of silk screens are under the condition of equal order number, and the novel silk screen transmitance of etch pattern TAC can promote 10%.
This silk screen optical filter, select the etch pattern TAC silk screen of high aperture to replace traditional wire gauze, this kind of novel etching silk screen adopts nanometer silver granuel exposure technique to solve the excessive phenomenon in point of crossing that old-fashioned etching silk screen exists simultaneously, improve the aperture opening ratio of silk screen 3 own, thereby effectively raised the transmitance of silk screen optical filter.
And on the first cover glass 1 of silk screen filter for shielding, plate a kind of broadband anti-reflection film of multilayer, can effectively reduce the front end reflection coefficient of liquid crystal display, improve the display effect of liquid crystal display.On the second cover glass 4 of silk screen filter for shielding, plate index matching layer, reduce reflection, to realize the optimization of silk screen optical filter reflecting effect, and then the display effect of raising liquid crystal display.
In addition in order further to reduce the reflection coefficient of silk screen optical filter itself, the principle producing according to reflection, we carry out the coupling of refractive index to forming the various device materials of silk screen optical filter, by selecting optical cement and the TAC material with appropriate index, reduce the reflection of each material interface of silk screen optical filter as far as possible.
Adopt the display module specularity factor of this silk screen optical filter to be reduced to 0.7%, diffuse-reflection factor 0.5%, has effectively improved the display effect of liquid crystal display, and the high light that has particularly improved LCD MODULE is readable.
Obviously specific implementation of the present invention is not subject to the restrictions described above, as long as adopted the improvement of the various unsubstantialities that method design of the present invention and technical scheme carry out, all within protection scope of the present invention.
Claims (10)
1. a silk screen optical filter; comprise the first cover glass, the second cover glass and be located at the silk screen between described the first cover glass and the second cover glass; it is characterized in that: described silk screen is the wire gauze being etched on TAC base material, on described wire gauze surface, be coated with successively copper layer and nickel dam.
2. silk screen optical filter as claimed in claim 1, is characterized in that: described wire gauze is the nanometer silver granuel silk screen of exposure on TAC base material.
3. silk screen optical filter as claimed in claim 1 or 2, is characterized in that: described copper layer and nickel dam are plated on described wire gauze surface by chemical plating method.
4. silk screen optical filter as claimed in claim 3, is characterized in that: between described the first cover glass and described silk screen one side and between the second cover glass and described silk screen opposite side, be respectively equipped with hot-melt film.
5. silk screen optical filter as claimed in claim 4, is characterized in that: described the first cover glass one side and hot-melt film contact, and described the first cover glass opposite side surface is provided with anti-reflection film.
6. silk screen optical filter as claimed in claim 5, is characterized in that: described anti-reflection film is broadband anti-reflection film.
7. silk screen optical filter as claimed in claim 6, is characterized in that: described the second cover glass one side and hot-melt film contact, and is provided with the index matching layer of gradually changed refractive index on described the second cover glass opposite side surface.
8. silk screen optical filter as claimed in claim 7, is characterized in that: the refractive index of described the first cover glass and the second cover glass is 1.47, and the refractive index of hot-melt film is that the refractive index of 1.48, TAC base material is 1.49.
9. silk screen optical filter as claimed in claim 8, is characterized in that: described silk screen string diameter is 8～12 μ m.
10. silk screen optical filter as claimed in claim 9, is characterized in that: the reflection coefficient of this silk screen optical filter is 0.7%, and diffuse-reflection factor is 0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310594944.1A CN103631038A (en) | 2013-11-22 | 2013-11-22 | Silk screen optical filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310594944.1A CN103631038A (en) | 2013-11-22 | 2013-11-22 | Silk screen optical filter |
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| Publication Number | Publication Date |
|---|---|
| CN103631038A true CN103631038A (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310594944.1A Pending CN103631038A (en) | 2013-11-22 | 2013-11-22 | Silk screen optical filter |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1079594A (en) * | 1996-07-08 | 1998-03-24 | Nissha Printing Co Ltd | Transparent electromagnetic shielding material and manufacture thereof |
| TW200301488A (en) * | 2001-12-19 | 2003-07-01 | Dainippon Printing Co Ltd | Thin sheet for shielding electromagnetic wave |
| CN1839669A (en) * | 2003-08-25 | 2006-09-27 | 旭硝子株式会社 | Electromagnetic shielding multilayer body and display using same |
| CN1965250A (en) * | 2004-06-25 | 2007-05-16 | 诺思罗普格鲁曼公司 | Optical compensation of cover glass-air gap-display stack for high ambient lighting |
| CN102548379A (en) * | 2004-06-23 | 2012-07-04 | 富士胶片株式会社 | Transparent electromagnetic shielding film and method for producing same |
-
2013
- 2013-11-22 CN CN201310594944.1A patent/CN103631038A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1079594A (en) * | 1996-07-08 | 1998-03-24 | Nissha Printing Co Ltd | Transparent electromagnetic shielding material and manufacture thereof |
| TW200301488A (en) * | 2001-12-19 | 2003-07-01 | Dainippon Printing Co Ltd | Thin sheet for shielding electromagnetic wave |
| CN1839669A (en) * | 2003-08-25 | 2006-09-27 | 旭硝子株式会社 | Electromagnetic shielding multilayer body and display using same |
| CN102548379A (en) * | 2004-06-23 | 2012-07-04 | 富士胶片株式会社 | Transparent electromagnetic shielding film and method for producing same |
| CN1965250A (en) * | 2004-06-25 | 2007-05-16 | 诺思罗普格鲁曼公司 | Optical compensation of cover glass-air gap-display stack for high ambient lighting |
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Application publication date: 20140312 |
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