US2012263936A1PendingUtilityA1

Device having reduced friction properties

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Assignee: KRZYAK MARTAPriority: Oct 23, 2009Filed: Apr 23, 2012Published: Oct 18, 2012
Est. expiryOct 23, 2029(~3.2 yrs left)· nominal 20-yr term from priority
Inventors:Marta KrzyakMarten WaltherPeter Kracht
Y10T428/265C23C 18/1254C23C 18/1225C03C 17/34C03C 17/42C03C 2217/76Y10T428/249953C03C 2217/425C03C 2218/365F21V 3/04Y10T428/266C23C 18/1216C03C 2217/734B05D 5/08C03C 17/3417G02B 1/115
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Claims

Abstract

A device, in particular a cover panel for a display device or a monitor auxiliary panel or a surface for input devices, includes a substrate and a coating applied onto the substrate. The coating has a surface having a coefficient of friction in the range between approximately 0.01 and 0.12, in particular between approximately 0.02 and 0.1, or between approximately 0.03 and 0.09.

Claims

exact text as granted — not AI-modified
1 . A cover panel for one of a display device, a monitor front panel and a surface for inputs, the cover panel comprising:
 a substrate which is a substantially flat panel having a first side and a second side; and   a coating applied onto at least one of said first side and said second side of said substrate to form an entire system, said coating including at least one anti-reflective coating and a cover layer arranged over said anti-reflective coating, a surface of said cover layer having a coefficient of friction in a range between approximately 0.01 and 0.12 and a reflectivity of said entire system being between approximately 0.1% and 7%.   
     
     
         2 . The cover panel according to  claim 1 , wherein said coefficient of friction is in a range between approximately 0.02 and 0.1. 
     
     
         3 . The cover panel according to  claim 2 , wherein said coefficient of friction is in a range between approximately 0.03 and 0.09. 
     
     
         4 . The cover panel according to  claim 1 , wherein said coating is formed of a material selected to substantially avoid adherence of a plurality of organic substances. 
     
     
         5 . The cover panel according to  claim 4 , wherein said plurality of organic substances include a plurality of oils and skin oil. 
     
     
         6 . The cover panel according to  claim 1 , wherein said cover layer has a thickness <approximately 20 nanometers (nm). 
     
     
         7 . The cover panel according to  claim 6 , wherein said cover layer has a thickness less than approximately 10 nm. 
     
     
         8 . The cover panel according to  claim 7 , wherein said cover layer has a thickness in a range between approximately 0.1 nm to 10 nm. 
     
     
         9 . The cover panel according to  claim 1 , wherein said at least one anti-reflective coating is optically adapted to said cover layer to provide an anti-reflective effect. 
     
     
         10 . The cover panel according to  claim 1 , wherein a refractive index of said coating between said cover layer is in a range between approximately 1.37 and 1.6. 
     
     
         11 . The cover panel according to  claim 1 , wherein said substrate is one of a glass panel, a synthetic substrate and a laminated glass panel. 
     
     
         12 . The cover panel according to  claim 11 , wherein said glass panel is one of a soda-lime glass panel and a borosilicate glass panel obtained in one of a draw method, float technology, from cast glass and from rolled glass. 
     
     
         13 . The cover panel according to  claim 11 , wherein said synthetic substrate is an acrylic-glass substrate. 
     
     
         14 . The cover panel according to  claim 1 , wherein said substrate has a thickness in a range between approximately 0.05 millimeters (mm) and 10 mm. 
     
     
         15 . The cover panel according to  claim 14 , wherein said substrate has a thickness in a range between approximately 0.05 mm and 8 mm. 
     
     
         16 . The cover panel according to  claim 15 , wherein said substrate has a thickness in a range between approximately 0.05 to 3 mm. 
     
     
         17 . The cover panel according to  claim 1 , wherein an outward facing surface of said coating has an angle of contact of >approximately 50°. 
     
     
         18 . The cover panel according to  claim 17 , wherein said angle of contact is approximately 70°. 
     
     
         19 . The cover panel according to  claim 18 , wherein said angle of contact is >approximately 80°. 
     
     
         20 . The cover panel according to  claim 1 , wherein said reflectivity of said entire system is in a range between approximately 0.1% and 6%. 
     
     
         21 . The cover panel according to  claim 20 , wherein said reflectivity of said entire system is in a range between approximately 0.1% and 5.5%. 
     
     
         22 . The cover panel according to  claim 21 , wherein said reflectivity of said entire system is in a range between approximately 0.1% and 4%. 
     
     
         23 . The cover panel according to  claim 22 , wherein said reflectivity of said entire system is in a range between approximately 0.1% and 2%. 
     
     
         24 . The cover panel according to  claim 23 , wherein said reflectivity of said entire system is in a range between approximately 0.1% and 1.5%. 
     
     
         25 . The cover panel according to  claim 1 , wherein said at least one anti-reflective coating is applied using one of a liquid technology, a high-vacuum technology, a chemical vapor deposition (CVD) process, and an etching process. 
     
     
         26 . The cover panel according to  claim 25 , wherein said liquid technology is a sol-gel technology. 
     
     
         27 . The cover panel according to  claim 26 , wherein said at least one anti-reflective coating is one of a single-layer interference coating and a multi-layer interference coating. 
     
     
         28 . The cover panel according to  claim 27 , wherein said multi-layer interference coating is a three layer to seven layer interference coating. 
     
     
         29 . The cover panel according to  claim 28 , wherein said multi-layer interference coating is a three-layer interference coating including a first layer having a refractive index between approximately 1.6 and 1.8, a second layer having a refractive index between approximately 1.9 and 2.5, and a third layer having a refractive index between approximately 1.4 and 1.5. 
     
     
         30 . The cover panel according to  claim 25 , wherein said at least one anti-reflective coating is applied using said high-vacuum technology as one of a single layer system and a multi-layer interference coating system. 
     
     
         31 . The cover panel according to  claim 30 , wherein said multi-layer interference coating system includes a three-layer to a seven-layer interference coating. 
     
     
         32 . The cover panel according to  claim 31 , wherein said at least one anti-reflective coating is produced in a sputtering process under a high vacuum. 
     
     
         33 . The cover panel according to  claim 31 , wherein said at least one anti-reflective coating is produced in a high-vacuum process using thermal evaporation. 
     
     
         34 . The cover panel according to  claim 25 , wherein said CVD process is one of an online-CVD process and an offline-CVD process. 
     
     
         35 . The cover panel according to  claim 25 , wherein said at least one anti-reflective coating is applied using said etching process as one of a porous layer and a light-scattering surface. 
     
     
         36 . The cover panel according to  claim 1 , wherein the cover panel is used for one of a display device, a part of a touch panel, a part of a touch screen with optical scanning, within a display system as a touch panel for interactive input of a plurality of signals, as a cover panel, as a protective panel, and as a protective cover for at least one of a display, an information display unit and a touch screen. 
     
     
         37 . A method to produce a cover panel for one of a display device, a monitor front panel, and a surface for inputs, the method comprising the steps of:
 providing a substrate;   applying an anti-reflective coating onto said substrate according to one of a liquid technology and a high-vacuum technology;   introducing said coated substrate into a pressure vessel set to a vacuum in a range of between approximately 10 Pascals (Pa) to 1050 hectopascals (hPa); and   applying a cover layer onto said anti-reflective coating such that a coefficient of friction is between approximately 0.01 and 0.12.   
     
     
         38 . The method according to  claim 37 , wherein said liquid technology is a sol-gel technology. 
     
     
         39 . The method according to  claim 37 , wherein said pressure vessel is set to between approximately 10 hPa to 500 hPa. 
     
     
         40 . The method according to  claim 37 , wherein said vacuum is one of a fine vacuum in a range between approximately 10 Pa and 100 Pa and a low vacuum above 100 Pa, said vacuum being evacuated. 
     
     
         41 . The method according to  claim 37 , wherein said coefficient of friction is between approximately 0.02 and 0.1. 
     
     
         42 . The method according to  claim 41 , wherein said coefficient of friction is between approximately 0.03 and 0.09. 
     
     
         43 . The method according to  claim 37 , further comprising the step of putting an ultra-hydrophobic coating material into a vaporizer located in said pressure vessel and evaporating and subsequently precipitating said ultra-hydrophobic coating material onto a surface of one of said substrate and said coating such that said one of said substrate and said coating has a coefficient of friction between approximately 0.01 and 0.12. 
     
     
         44 . The method according to  claim 43 , wherein said ultra-hydrophobic coating material is precipitated onto said at least one anti-reflective coating in a form of said cover layer. 
     
     
         45 . The method according to  claim 43 , wherein said coefficient of friction is between approximately 0.02 and 0.1. 
     
     
         46 . The method according to  claim 45 , wherein said coefficient of friction is between approximately 0.03 and 0.09. 
     
     
         47 . The method according to  claim 43 , wherein a temperature in said vaporizer is between approximately 100° C. and 400° C. 
     
     
         48 . The method according to  claim 47 , wherein said substrate exhibits a temperature of between approximately 300 K and 370 K. 
     
     
         49 . The method according to  claim 37 , wherein said cover layer has a thickness <approximately 20 nanometers (nm). 
     
     
         50 . The method according to  claim 49 , wherein said thickness of said cover layer is <approximately 10 nm. 
     
     
         51 . The method according to  claim 50 , wherein said thickness of said cover layer is in a range between approximately 0.1 nm to 10 nm. 
     
     
         51 . The method according to  claim 37 , further comprising the step of producing one of a display device, a part of a touch panel, a part of a touch screen with optical scanning, a touch panel within a display system for interactive input of a plurality of signals, a cover for a display system for interactive input of a plurality of signals, a protective panel for a display system for interactive input of a plurality of signals, a protective cover for a display, an information display unit, and a touch screen.

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