Abstract: An optical recording medium in which deposition of impurities or damage to a surface of the medium illuminated by the light for signal recording and/or reproduction is to be prevented from occurring. An amine salt compound of perfluoropolyether having terminal carboxylic groups, represented by the chemical formulas (1) and/or (2): Rf—COO?N+HR1R2R3??(formula 1) R1R2R3N+H?CO—Rf—COO?N+HR1R2R3??(formula 2) where Rf denotes a perfluoropolyether group and R1, R2 and R3 denote hydrogen or a hydrocarbon group, is held on the surface side illuminated by light.

Abstract: A recording apparatus including: a recording head having a plurality of actuators for performing dot printing; a drive circuit which outputs respective drive pulses to the respective actuators; and a main circuit which transmits, to the drive circuit, a drive signal for outputting the respective drive pulses to the respective actuators. The drive signal includes selection data for selecting, for each of the actuators, a drive-waveform signal which provides a waveform of each of the drive pulses, among plural sorts of drive-waveform signals. The main circuit transmits, to the drive circuit, a clock signal and a drive-waveform-data signal that is a serial signal in which is included data to generate the plural sorts of drive-waveform signals. The drive circuit includes a drive-waveform-signal generating circuit which generates the plural sorts of drive-waveform signals on the basis of the clock signal and the drive-waveform-data signal.

Abstract: An optical recording medium in which deposition of impurities or damage to a surface of the medium illuminated by the light for signal recording and/or reproduction is to be prevented from occurring. An amine salt compound of perfluoropolyether having terminal carboxylic groups, represented by the chemical formulas (1) and/or (2): Rf—COO?N+HR1R2R3??(formula 1) R1R2R3N+H?CO—Rf—COO?N+HR1R2R3??(formula 2) where Rf denotes a perfluoropolyether group and R1, R2 and R3 denote hydrogen or a hydrocarbon group, is held on the surface side illuminated by light.

Abstract: An optical recording medium in which deposition of impurities or damage to a surface of the medium illuminated by the light for signal recording and/or reproduction is to be prevented from occurring. An amine salt compound of perfluoropolyether having terminal carboxylic groups, represented by the chemical formulas (1) and/or (2): Rf—COO?N+HR1R2R3??(formula 1) R1R2R3N+H?CO—Rf—COO?N+HR1R2R3??(formula 2) where Rf denotes a perfluoropolyether group and R1, R2 and R3 denote hydrogen or a hydrocarbon group, is held on the surface side illuminated by light.

Abstract: A light guide member (35) is made of a transparent material, and includes a main body portion (35a), disposed at a back side of a central portion of an operating member (2), and extension portions (35d, 35e) which extend from the main body portion, and are disposed respectively at back sides of push operating portions (8, 9). This light guide member is separate from the operating member (2), and light emitted from LEDs (66) passes sequentially through the main body portion (35a) of the light guide member (35) and the extension portions (35d, 35e) to illuminate light-transmitting indicating portions (12, 13) of the operating member.

Abstract: A display device antireflection filter 100 formed on a glass base material is comprised of an antireflection layer 102 of at least one layer containing SiO2 and a material layer 103 made of composition produced by adding compound whose interaction with SiO2 is small to compound having alkoxysilane group at terminal and which has perfluoropolyether group. This device exhibits improved wear and abrasion resistance.

Abstract: A light guide member (35) is made of a transparent material, and includes a main body portion (35a), disposed at a back side of a central portion of an operating member (2), and extension portions (35d, 35e) which extend from the main body portion, and are disposed respectively at back sides of push operating portions (8, 9). This light guide member is separate from the operating member (2), and light emitted from LEDs (66) passes sequentially through the main body portion (35a) of the light guide member (35) and the extension portions (35d, 35e) to illuminate light-transmitting indicating portions (12, 13) of the operating member.

Abstract: A moving member 20 for operating a contact mechanism is provided in a body case 12 in such a manner as to be movable in its projecting and retracting direction. A rubber-made waterproof cap 23 is provided on a front portion of the body case 12 in such a manner as to cover the moving member 20. When a door 31 is closed, the moving member 20 including the rubber cap 23 is pressed by the door 31 to turn off the contact, whereas when the door 31 is opened, the pressing force is canceled to turn on the contact. A distal wall portion of the rubber cap 23 is formed of a low-friction member to form a low-friction portion 23b. Consequently, contact surfaces of the rubber cap 23 and the door 31 are formed as low-friction surfaces, and contact surfaces of the rubber cap 23 and the moving member 20 are also formed as low-friction surfaces.

Abstract: A display device antireflection filter 100 formed on a glass base material is comprised of an antireflection layer 102 of at least one layer containing SiO2 and a material layer 103 made of composition produced by adding compound whose interaction with SiO2 is small to compound having alkoxysilane group at terminal and which has perfluoropolyether group. This device exhibits improved wear and abrasion resistance.

Abstract: An optical recording medium incorporating a supporting body; a recording portion which is formed on either main surface of the supporting body and on which a signal is recorded; and a light permeable layer formed on the recording portion, wherein light is applied from a position adjacent to the light permeable layer to record/reproduce a signal, and carboxylic acid amine salt expressed by general formula (1) and/or general formula (2) is held on the surface which is irradiated with light where n is an integer from 1 to 3, each of R1 and R2 is hydrogen or a hydrocarbon group, R3 is a hydrocarbon group and Rf is a perfluoroalkyl group having three or more carbon atoms, where at least either of R1 and R2 is perfluoroalkyl group having three or more carbon atoms, at least any one of R1, R2, R3, R4 and R5 is hydrocarbon group having 12 or more carbon atoms and the rest of them are hydrogen or hydrocarbon group.

Abstract: A three-dimensional display is provided with a display device alternatively displaying an image for the right eye and an image for the left eye in division of the images at predetermined time periods. A liquid crystal shutter disposed in front of the display device is operated in synchronization with image switching of the display device, and the image transmitted through the liquid crystal shutter is observed as a three-dimensional image through polarized glasses of which polarizing directions differ in the right and left from each other. The liquid crystal cell which serves as a liquid crystal shutter has a structure of a ferroelectric liquid crystal held between two sheets of resin film substrates and the ferroelectric liquid crystal contains more than 10 wt % of ferroelectric liquid crystal polymer so that it can respond to a large size display device and a high speed motion.

Abstract: A method of flattening projections on a sheet material having fine projections on a surface thereof, which protrude from a flat portion of the sheet material, said method comprising partially immersing a rod member, which has a surface having a polishing capability, into a liquid, rotating the rod member so as to form a film of the liquid on the surface of the portion of the rod member, which is exposed above the surface of the liquid, and conveying the sheet material in one direction while contacting a surface of the sheet material with the film, thus polishing the projections.

Abstract: The present invention is a filter for a display device having a substrate 1, an outermost layer inorganic film provided on the substrate 1 through or not through one or more other films and a surface modified film covering the surface of the outermost layer inorganic film and having a polar term component .gamma..sup.p of the surface energy of not more than 2.0 erg/cm.sup.2. The present invention provides a filter for a display device having an antireflection property superior in stain resistance, scratch resistance, processing resistance, etc. and suitable even when used as a front panel of a CRT or other display device.

Abstract: A composition for forming an antifouling film or an optical component having such an antifouling film, for example, an anti-reflection filter, contains an alkoxysilane compound having a perfluoropolyether group indicated by the following general formula (1):R.sub.f (COR.sub.1 --R.sub.2 --Si(OR.sub.3).sub.3 }.sub.j (1)where, in the formula, R.sub.f indicates a perfluoropolyether group, R.sub.1 indicates a bivalent atom or group, R.sub.2 indicates an alkylene group, R.sub.3 indicates an alkyl group, and j is 1 or 2.

Abstract: Disclosed herein is a magnetic recording medium comprising a nonmagnetic substrate, a magnetic thin film layer on said substrate, and a lubricant layer on said magnetic layer, wherein said lubricant layer contains a compound having the formula:RN.sup.+ H.sub.3 O.sup.- OCRf.sub.1wherein R is a hydrocarbon group which has three or more carbon atoms, and Rf.sub.1 is a perfluoropolyether group. This magnetic recording medium has a low coefficient of friction and shows improved wear resistance and durability.

Abstract: There is provided a lubricant which is produced by dissolving a sorbitan ester compound in a solvent such as hexane or toluene. In the sorbitan ester compound, at least one of hydroxyl groups of 1,5-sorbitan is linked by ester linkage to a perfluoro polyether having a terminal carboxyl group and at least an other hydroxyl group is linked by ester linkage to a hydrocarbon having a terminal carboxyl group. There is also provided a thin magnetic metal film type magnetic recording medium or a coated magnetic recording medium in which the above lubricant is held on the surface of a magnetic layer. The lubricant exhibits superior lubricating effects under all conditions and is capable of maintaining the lubricating effects for prolonged time. Consequently, the magnetic recording medium which has the lubricant held on the magnetic layer exhibits superior running durability and resistance against abrasion.

Abstract: A magnetic recording medium having a magnetic metal thin film as a magnetic layer is disclosed. An oxide layer is formed on the surface of the magnetic metal thin film, and a proactive layer is further formed on the oxide layer. The oxide layer on the surface of the magnetic metal thin film has a thickness of 20 to 230 .ANG., while the protective layer has a thickness of 20 to 230 .ANG.. The combined total thickness of the oxide layer and the protective layer is 40 to 250 .ANG.. The oxide layer surface may be bombarded prior to formation of the protective layer for improving the bonding of the protective layer. A lubricant may be coated on the surface of the protective layer. The lubricant may be one of perfluoro alkyl ester of carboxylic acid, ester compounds of perfluoro polyether having carboxylic groups, and amine salt compounds. The reverse surface of a non-magnetic base film as a substrate has a centerline mean roughness R.sub.a and the maximum height R.sub.max of projections in the ranges of 0.015 .mu.

Abstract: A magnetic recording medium comprises a non-magnetic support and a magnetic layer formed on the support wherein an ascorbic ester compound is incorporated in or formed on the magnetic layer. The medium has good durability under different and severe use conditions.

Abstract: Novel perfluoropolyether derivatives are described which are obtained from perfluoropolyethers having a carboxyl group at one or both ends and monoamines or diamines. The derivative is useful as a lubricant owing to its significantly improved lubricity. The lubricity is shown under severe high or low temperature and humidity conditions over a long term. The derivative is especially useful as a lubricant for magnetic recording mediums of the coating and metal thin film types.

Abstract: Novel perfluoropolyether derivatives are described which are obtained from perfluoropolyethers having a carboxyl group at one or both ends and monoamines or diamines. The derivative is useful as a lubricant owing to its significantly improved lubricity. The lubricity is shown under severe high or low temperature and humidity conditions over a long term. The derivative is especially useful as a lubricant for magnetic recording mediums of the coating and metal thin film types.