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Undercoating process for CRT
Patent reports Undercoating process for CRT Misubishi Rayon KK
Organic light-emitting device Matsushita Electrical Industry
Eur 467 357; 18 July 1991
Eur 470 629; 8 August 1991
An undercoating process is described for CRT metal back layers. It uses aqueous pretreatment comprising a monoalcohol and a high-molecular-weight water-soluble compound. The process for the formation of an undercoat for a CRT metal back layer comprises (a) coating a glass panel carrying a fluorescent layer with an aqueous film 2-20 wt% 1-3C alkyl monoalcohol, 0.05-1 wt% water-soluble, high-molecularweight compound and 79-97.75 wt% water; and (b) forming a wet-on-wet layer on this of an undercoating composition. This comprises (i) 1-7 wt% acrylic resin obtained by co-polymerizing 90-100 wt% I ~ C alkyl (excluding t-Bu) methacrylate, and 0-10 wt% ethylenically unsaturated monomer, and (ii) 99-93 wt% solvent containing at least 80 wt% toluene, and (c) drying the layers to form the undercoat. The pretreatment composition (a) and the undercoating composition (b) are also claimed. In the production of high-luminance, high-definition CRTs, the process provides the formation of smooth, pinholeand crack-free undercoat, thus giving smooth metal back layers.
An organic light-emitting device containing cyclic imide(s) is described. An organic light-emitting device has a light-emitting layer, between electrodes mounted on a base plate, comprising a polymer with a repeating unit of formula -Z-(X-Y-),-(I) (n ~> 2; X = O, S, Se or Te; Y = (substituted) aromatic group; Z = a group containing a cyclic imide). The device may also include a carrier transport layer comprising a repeating unit of formula -(X-Y-)n-(II) (n ~>2; X = O , S, Se or Te; Y = (substituted) aromatic group). The process for preparing the device is also claimed. In displays, and spatial light modulators, neural networks, etc. used in optical computing devices, the LEDs have high brightness with little change in brightness with time.
Optical display device Toshiba Eur 468 423; 22 July 1991 An optical display device to prevent external light reflectance is described. The display device comprises a display screen with an optical film formed on it to prevent an external light reflection. The optical film is provided by a porous thin film having fine magnesium fluoride particles and a binder containing, as a main component, at least one condensate selected from a condensate of a silane compound having a fluoroalkyl group and a co-condensate between the silane compound and a silicone or metal oxide series compound. The device is preferably a cathode-ray tube or a liquid crystal display device. The optical film has a porosity of 4.5-36%. The fine magnesium particles have a particle diameter of 10-1000 ]k. The silane compound having a fluoroalkyl group is at least one selected from:
CCD imaging sensor California Institute o/" Technology US 5005 063; 2 April 1991 A back side-illuminated CCD imaging sensor for reading out image charges from wells of the array of pixels is described. It is significantly improved for blue, UV, far UV and low-energy X-ray wavelengths (1-5000/~) by overthinning the back side so as to place the depletion edge at the surface. A thin transparent metal film of ~ 10/k is deposited on a native-quality oxide film of < ~30 ~ grown on the thinned back side. The metal is selected 1o have a higher work function than that of the semiconductor so as to bend the energy bands (at the interface of the semiconductor material and the oxide film) to eliminate wells that would otherwise trap minority carriers. A bias voltage may be applied to extend the frontside depletion edge to the interface of the semiconductor material with the oxide film if there is not sufficient thinning. This metal film ('flash gate') which improves and stabilizes the quantum efficiency of a CCD imaging sensor, will also improve the QE of any p-n junction photodetector.
CF3(CF2)5(CH2)zSi(OR)3; CFs(CF2)5(CH2)2Si(CH3)(OR)2;
Demultiplexer for colour TV signal Deutsche Thomson-Brandt GmbH
CF3(CH2)2Si(OR)3; (OR)3Si(CH2)2(CF2)5(H2)2Si(OR)3;
US 5005 073; 2 April 1991
CF3(CF2)7(CH2)2Si(OR)3; CF3(CH2)2SiCI3, etc.
A demultiplexer for colour television is described. To achieve a qualitative improvement of television images through increased image frequency with simultaneously increased resolution, a high storage capacity is needed. To process a combined colour television signal, a demultiplexer with a shift register to which the data stream of the colour television signal is fed is employed. Parallel outputs from this shift register are connected to a storage. Additionally, a second and third shift register are present, the parallel inputs of which are connected in the storage and from the serial outputs of which the individual components of the colour television signal can be obtained. Further, a sequence controller consisting of address counters is used to access row and columns of the second and third shift registers individually. The invention simplifies the use of storage for digital signal processing in colour television sets.
(where R = alkyl or phenyl group). The co-condensate is at least one co-condensate from co-condensates between one member of the silane compound having a fluoroalkyl group and the other member of silicon, titanium alkoxide and zirconium alkoxide. The binder is added in an amount of 0.25-11 parts by weight relative to 1 part by weight of the fine magnesium particles. The porous thin film also contains at least one kind of electroconductive fine particle selected from indium oxide and tin oxide. A display device is provided that has film which sufficiently eliminates external light reflection, has high mechanical strength and is low in deterioration with time. The luminous reflectance of the optical film does not change with time, as water is prevented from entering the pores of the film by the fluoroalkyl group.
Displays
Volume 14 Number 1 1993
59
Organic light-emitting device Matsushita Electrical Industry
Eur 467 357; 18 July 1991
Eur 470 629; 8 August 1991
An undercoating process is described for CRT metal back layers. It uses aqueous pretreatment comprising a monoalcohol and a high-molecular-weight water-soluble compound. The process for the formation of an undercoat for a CRT metal back layer comprises (a) coating a glass panel carrying a fluorescent layer with an aqueous film 2-20 wt% 1-3C alkyl monoalcohol, 0.05-1 wt% water-soluble, high-molecularweight compound and 79-97.75 wt% water; and (b) forming a wet-on-wet layer on this of an undercoating composition. This comprises (i) 1-7 wt% acrylic resin obtained by co-polymerizing 90-100 wt% I ~ C alkyl (excluding t-Bu) methacrylate, and 0-10 wt% ethylenically unsaturated monomer, and (ii) 99-93 wt% solvent containing at least 80 wt% toluene, and (c) drying the layers to form the undercoat. The pretreatment composition (a) and the undercoating composition (b) are also claimed. In the production of high-luminance, high-definition CRTs, the process provides the formation of smooth, pinholeand crack-free undercoat, thus giving smooth metal back layers.
An organic light-emitting device containing cyclic imide(s) is described. An organic light-emitting device has a light-emitting layer, between electrodes mounted on a base plate, comprising a polymer with a repeating unit of formula -Z-(X-Y-),-(I) (n ~> 2; X = O, S, Se or Te; Y = (substituted) aromatic group; Z = a group containing a cyclic imide). The device may also include a carrier transport layer comprising a repeating unit of formula -(X-Y-)n-(II) (n ~>2; X = O , S, Se or Te; Y = (substituted) aromatic group). The process for preparing the device is also claimed. In displays, and spatial light modulators, neural networks, etc. used in optical computing devices, the LEDs have high brightness with little change in brightness with time.
Optical display device Toshiba Eur 468 423; 22 July 1991 An optical display device to prevent external light reflectance is described. The display device comprises a display screen with an optical film formed on it to prevent an external light reflection. The optical film is provided by a porous thin film having fine magnesium fluoride particles and a binder containing, as a main component, at least one condensate selected from a condensate of a silane compound having a fluoroalkyl group and a co-condensate between the silane compound and a silicone or metal oxide series compound. The device is preferably a cathode-ray tube or a liquid crystal display device. The optical film has a porosity of 4.5-36%. The fine magnesium particles have a particle diameter of 10-1000 ]k. The silane compound having a fluoroalkyl group is at least one selected from:
CCD imaging sensor California Institute o/" Technology US 5005 063; 2 April 1991 A back side-illuminated CCD imaging sensor for reading out image charges from wells of the array of pixels is described. It is significantly improved for blue, UV, far UV and low-energy X-ray wavelengths (1-5000/~) by overthinning the back side so as to place the depletion edge at the surface. A thin transparent metal film of ~ 10/k is deposited on a native-quality oxide film of < ~30 ~ grown on the thinned back side. The metal is selected 1o have a higher work function than that of the semiconductor so as to bend the energy bands (at the interface of the semiconductor material and the oxide film) to eliminate wells that would otherwise trap minority carriers. A bias voltage may be applied to extend the frontside depletion edge to the interface of the semiconductor material with the oxide film if there is not sufficient thinning. This metal film ('flash gate') which improves and stabilizes the quantum efficiency of a CCD imaging sensor, will also improve the QE of any p-n junction photodetector.
CF3(CF2)5(CH2)zSi(OR)3; CFs(CF2)5(CH2)2Si(CH3)(OR)2;
Demultiplexer for colour TV signal Deutsche Thomson-Brandt GmbH
CF3(CH2)2Si(OR)3; (OR)3Si(CH2)2(CF2)5(H2)2Si(OR)3;
US 5005 073; 2 April 1991
CF3(CF2)7(CH2)2Si(OR)3; CF3(CH2)2SiCI3, etc.
A demultiplexer for colour television is described. To achieve a qualitative improvement of television images through increased image frequency with simultaneously increased resolution, a high storage capacity is needed. To process a combined colour television signal, a demultiplexer with a shift register to which the data stream of the colour television signal is fed is employed. Parallel outputs from this shift register are connected to a storage. Additionally, a second and third shift register are present, the parallel inputs of which are connected in the storage and from the serial outputs of which the individual components of the colour television signal can be obtained. Further, a sequence controller consisting of address counters is used to access row and columns of the second and third shift registers individually. The invention simplifies the use of storage for digital signal processing in colour television sets.
(where R = alkyl or phenyl group). The co-condensate is at least one co-condensate from co-condensates between one member of the silane compound having a fluoroalkyl group and the other member of silicon, titanium alkoxide and zirconium alkoxide. The binder is added in an amount of 0.25-11 parts by weight relative to 1 part by weight of the fine magnesium particles. The porous thin film also contains at least one kind of electroconductive fine particle selected from indium oxide and tin oxide. A display device is provided that has film which sufficiently eliminates external light reflection, has high mechanical strength and is low in deterioration with time. The luminous reflectance of the optical film does not change with time, as water is prevented from entering the pores of the film by the fluoroalkyl group.
Displays
Volume 14 Number 1 1993
59