Abstract: A display filter and a display apparatus including the display filter increase a contrast ratio, increase brightness, and have a great electromagnetic (EM) radiation-shielding effect. The display filter includes a filter base and an external light-shielding layer formed on a surface of the filter base. The external light-shielding layer includes a base substrate including a transparent resin and light-shielding patterns spaced apart on a surface of the base substrate at predetermined intervals, and including a conductive material.

Abstract: An interface module for receiving television signals or radio signals has several inputs and outputs for receiving and distributing picture and sound signals as well as control signals and at least one input for antenna signals. The interface module includes at least one tuner and a chip with a microprocessor including memory and data capture capability, and is capable of picture, color and sound decoding and signal processing units. The chip and the tuner are installed in a common casing.

Abstract: A durable unitary lens filter is provided for use with a touch sensitive display device for associated control process equipment. A front cover secures the unitary lens filter to the machine. The lens assembly includes a mounting bezel that supports an intermediate lens securing an integral rear lens filter through which a responsive display shows process information to an operator. The front cover captivates the integral bezel to secure the lens to the associated process device. The lens is molded from a semi-rigid material composition including glass fibers. An internal retainer compressibly captivates the bezel against the front cover. The bezel periphery extends substantially beyond the outermost peripheral edge of the rear lens so that forces thereto are transferred and dissipated to the machine housing.

Abstract: A TV receiver having a metal front cabinet is provided with a discharge path between the front cabinet and a ground portion of the TV receiver. The discharge path includes a series circuit in which a discharge tube is connected in series to a parallel circuit of a first resistor and a high-voltage capacitor and a second resistor that is connected in parallel to the series circuit. The discharge path effectively discharges a voltage occurring at the front cabinet via the second resistor while preventing a sudden flow of current and reducing the influence of static electricity. The series circuit in which the discharge tube is connected in series to the parallel circuit of the first resistor and the high-voltage capacitor has a function of causing high-voltage pulses occurring at the ground portion GND to escape to the front cabinet while converting those into pulses having a low voltage level.

Abstract: The present invention relates to a color cathode ray tube and more specifically to a color cathode ray tube in which electron beam landing errors caused by terrestrial magnetism are corrected such that color purity is improved.

Abstract: A display apparatus having a base board in which a tuner-mounted video board and various circuit components are electrically connected, and a back case, connected to the base board and protecting the video board and the circuit components, wherein the back case has: a main case covering the electronic circuit components; and a sub-case detachably connected to the main case, mounted with the video board, and blocking electromagnetic interference between the video board and the electronic circuit components. With this configuration, the present invention provides a display apparatus with a high quality of a picture image, that prevents a sustain noise by blocking electromagnetic interference between the video board and electric circuit components. The present invention also provides convenient access for after-sale maintenance and upgrade of the video board and the electric circuit components.

Abstract: There is provided an image display device including a panel of good work efficiency which can prevent the destruction of its conductive coat due to discharge and can highly efficiently reduce the leakage of unwanted radiation electric fields. The image display device includes a panel grounding electrode which connects a conductive coat and a grounding member together, and the panel grounding electrode uses a conductive adhesive material having in the whole of an adhesive layer, and an insulative protective tape.

Abstract: An image display apparatus which employs a cathode ray tube displays, when an image displayed on a screen of the cathode ray tube is to be corrected against an inclination caused by the terrestrial magnetism, a reference for correction is displayed on the screen of the cathode ray tube so that correction current appropriate for correction of the image against the inclination caused by the terrestrial magnetism can be obtained in a short time.

Abstract: The present invention discloses a color CRT system that can be easily adapted for installations in either the northern or the southern hemisphere. The CRT is symmetrical with respect to its yamming or set up for the earth's magnetic field so the CRT can be installed in either a normal or an inverted orientation. Likewise the yoke and yoke connector are designed and can be easily installed so the CRT scan starts in the upper left of the CRT in either the normal or inverted installation. The connectors for the neck video card are designed to exit the side of the card so the wires can be routed to the CRT system card in either CRT installation orientation. Finally the anode wire is made with a length and attachment point such that the anode is wireable when the CRT is in the normal or inverted orientation.

Abstract: A geomagnetism sensor (2) outputs the vertical magnitude of geomagnetism as a detection signal (Vy). An A-D converter (5) converts the detection signal (Vy) into digital data which in turn is supplied to a CPU (6) together with data from a memory (1). The CPU (6) performs a computation based on a vertical deflection signal (VH), the data from the memory (1) and the detection signal (Vy) to provide parameters (hposi, yvj, vcancel) for determining current values to be supplied to a deflection yoke (13), a convergence correction coil (14) and a beam landing correction coil (15). D-A converters (7-9) convert these parameters into analog signals. Drive circuits (10-12) receives the analog signals provided by conversion to generate current for driving the deflection yoke (13), the convergence correction coil (14) and the beam landing correction coil (15). Image variations under the influence of the vertical component of geomagnetism are automatically corrected.

Abstract: The invention relates to a software method for reducing the electromagnetic irradiation of the Phase Lock Loop (PLL) within an On-Screen Display Menu system. The method includes the steps as follows: setting the resolution of an OSD system to a predetermined pass value of Electromagnetic Interference (EMI); checking the OSD system; changing the resolution of the OSD system to a value to be displayed if the OSD system is started; keeping on the predetermined value of EMI if the OSD system is not started; repeating the checking of the OSD system step.

Abstract: In a method of treating a surface of a face panel for an image display including forming a film on the surface using coating materials, the film is formed of at least two layers including a first layer formed by a spray coating method and a second layer formed by a spin coating method to be superposed on the first layer. Thus, a face plate having antireflection/antistatic effects and providing high-resolution images can be obtained with high efficiency.

Abstract: Circuits and buses directed to analog signal processing are accommodated in a cabinet functioning as an electromagnetic shielding. Circuits and buses directed to digital signal processing are disposed outside the cabinet. In order to minimize generation of noise from the bus through which digital data is transmitted, a microprocessor combines a plurality of signals and data as digital data for output onto a bus from one I/O port. A decoder that receives and separates the combined data is provided in the cabinet. Data is transferred between the microprocessor and the decoder through one bus. As a result, a digital/analog common tuner has the influence of noise generated from a digital signal processing system on the analog signal processing system suppressed, improving the reception properties.

Abstract: The invention relates to an interface module for receiving television signals or radio signals, having several inputs (7) and outputs (7, 9, 10, 14) for receiving and distributing picture and sound signals as well as control signals and at least one input for receiving antenna signals (5a), the interface module comprising at least one tuner (1) and a chip (2) having a microprocessor (4), which comprises memory means and means for capturing data and having switching means (11), picture, color and sound decoding means (12) and signal processing means (13), whereas the chip (2) and the tuner (1) are installed in one common casing (3).

Abstract: The invention provides a transparent member for use as a shield against electromagnetic waves characterized in that an electrically conductive reticular pattern is provided on a substrate (1) by forming a thin-film layer (2) of copper or an alloy thereof on the substrate by physical thin film formation and forming a copper thick-film layer (4) on the thin-film layer by plating so as to give the member a total transmittance of at least 50%, the reticular pattern having an electric resistivity of up to 200 m&OHgr;/□.

Abstract: A stacked film, which has a conductive film and a dielectric film formed on the conductive film, is stuck on a front surface of a panel portion of a cathode ray tube. One end of a conductive tape is stuck on the dielectric film of the stacked film, and the other end of the conductive tape is stuck on a band functioning as a ground portion of the cathode ray tube. The conductive tape has a conductive sticky layer which has a sheet resistivity in a range of 10 &OHgr;/cm2 to 1 K&OHgr;/cm2. The conductive film of the stacked film is electrically connected to the band of the cathode ray tube via the conductive tape. With this configuration, electrostatic charges on a display screen and leakage of an electromagnetic field from the display screen can be reduced.

Abstract: The invention relates to a software method for reducing the electromagnetic irradiation of the Phase Lock Loop (PLL) within an On-Screen Display Menu system. The method includes the steps as follows: setting the resolution of an OSD system to a predetermined pass value of Electromagnetic Interference (EMI); checking the OSD system; changing the resolution of the OSD system to a value to be displayed if the OSD system is started; keeping on the predetermined value of EMI if the OSD system is not started; repeating the checking of the OSD system step.

Abstract: A purity adjustment device for a video display appliance which automatically compensates for a purity of a picture displayed on a CRT screen that is varied due to the change of the earth magnetic field by electromagnetic deflection using a purity coil.

Abstract: Provided are a high strength cold rolled steel sheet and a high strength plated steel sheet possessing improved geomagnetic shielding properties, that is, having a high relative permeability in a d.c. magnetic field around 0.3 Oe, a process for producing the same, and an explosion-proof band or an outer magnetic shielding material, for television cathode-ray tubes, using the steel sheet. An ultra low carbon steel, which has a carbon content of not more than 0.0060% and has been subjected to solid solution strengthening utilizing silicon and magnesium without relying upon precipitation strengthening, is deoxidized with silicon so that aluminum is substantially absent in the steel. Alternatively, when the ultra low carbon steel is deoxidized with aluminum, boron is added to inhibit the precipitation of AlN. Next, the deoxidized steel is finish rolled at 750 to 980.degree. C., cold rolled with a reduction ratio of 60 to 90%, and then annealed in the temperature range of 750.degree. C. to the Ac.sub.

Abstract: An apparatus for attaching a degauss coil to a cathode-ray tube can simplify a manufacturing process by reducing the number of assemblies for attaching a degauss coil stretched over a curved surface of a funnel of a cathode-ray tube. This apparatus includes a front cabinet for holding a cathode-ray tube with a screen on which an image is displayed by the scanning of electron beams and a degauss coil disposed at the rear of the cathode-ray tube for degaussing the cathode-ray tube wherein degauss coil holders for holding the degauss coil are unitarily formed as one body with the front cabinet.

Abstract: A magnetism shield for a color cathode ray tube is disclosed including: a shadow mask through which an electron beam passes; a mask frame to which the shadow mask is fixed; an inner shield fixed to the mask frame and for preventing the path of the electron beam from being distorted due to magnetism; a panel; a phosphorous surface formed on the inner surface of the panel; and means for shielding an area placed between the shadow mask and phosphorous surface.

Abstract: Electromagnetic interference ("EMI") is reduced in a CRT video display system by spreading-out the EMI-producing spectra present in the video pixel data and/or clock signals. A clock dropping circuit coupled between the display generator main oscillator and the timing generator periodically phase-modulates the timing generator clock signal such that it comprises N phases, where N.gtoreq.2. As a result, each horizontal line of video data and the horizontal synchronization signals is phase shifted. This dual-shifting effect eliminates display image distortion that would result if only the video signal were shifted. Video distortion is further minimized by deriving the horizontal and vertical synchronizing signals from a common constant clock. EMI energy associated with each clock harmonic is spread by a frequency amount .DELTA.f proportional to the rate of phase change in the clock signal, the rate of phase change exceeding half the bandwidth f.sub.m of a standard EMI measurement reference window.

Abstract: Circuitry to control a power supply of a degaussing coil of a cathode ray tube, said degaussing coil is coupled to a main voltage supply through a switching device the circuitry has inputs coupled to a direct source of current of a switched mode power supply, the switched mode power supply comprises a switched mode transformer with primary windings coupled to the main source of voltage, and secondary windings and the switched mode power supply is switched in a first range of frequencies when the power supply is in a "standby" mode and in a second range of frequencies when the power supply is in an "on" mode wherein said circuitry comprising a detecting circuit which detectes a change in the range of switching frequencies when the power supply is switched from standby to on, the detecting circuit having an input coupled to a direct current source being downstream of a primary winding of the switched mode transformer and an output coupled to an input of a control circuit of the switching device the control circ

Abstract: A picture tilt complementing circuit in a display device includes: a microcomputer for receiving horizontal and vertical sync signals from a computer and generating a tilt control signal; a horizontal sawtooth wave generation unit for converting the tilt control signal transmitted from the microcomputer into a sawtooth wave signal according to a horizontal fly back signal; a vertical sawtooth wave generation unit for converting the tilt control signal transmitted from the microcomputer into a sawtooth wave signal according to a vertical fly back signal; a vertical center control unit for synthesizing a horizontal sawtooth wave signal generated by the horizontal sawtooth wave generation unit with a vertical position control signal transmitted from the microcomputer and sending the synthesized result to a vertical output unit; and a horizontal position control unit for synthesizing a vertical sawtooth wave signal generated by the vertical sawtooth wave generation unit with a horizontal position control signal t

Abstract: A device for removing electric field of a display according to the present invention comprises: a voltage generator connected to a horizontal deflection output circuit of a CRT and generating an antiphase reverse pulse having a frequency band equal to that of a horizontal output pulse; a reverse pulse sensor made of a conductive material, insulated at a given location in the front part of the CRT, and generating the reverse pulse around the CRT; and a connector for detecting the reverse pulse of the voltage generator, connected to ground at one end thereof and the reverse pulse sensor at the other end thereof, and sending the reverse pulse to the reverse pulse sensor.

Abstract: A magnetic compensating circuit includes a magnetic sensor (1), a control circuit (2) for generating a signal for magnetic compensation, and coils (3) for magnetic compensation. The magnetic sensor has a pair of amorphous magnetic substance wires (101) arranged in parallel, coils (102) for providing the pair of amorphous magnetic substance wires with bias magnetic fields in directions opposite to each other, a high-frequency power source (105) for supplying the pair of amorphous magnetic substance wires with high-frequency currents, and circuits (106, 107, 108, 109) for outputting a potential difference derived from the output of the pair of amorphous magnetic substance wires. Thus, this magnetic compensating circuit is capable of detecting a minute external magnetic field with high accuracy.

Abstract: A display comprising a cathode ray display tube (1) having an electromagnetic deflection yoke (2) is described. A pair of first deflection coils (7,6) are located symmetrically about the longitudinal axis of the tube (1) on opposite sides of the yoke (2) for producing within the tube (1) a first magnetic deflection field. A pair of second deflection coils (8,20) are similarly located symmetrically about the longitudinal axis on opposite sides of the yoke (2) for producing within the lube (1) a second magnetic deflection field at right angles to the first deflection field. The display is further provided with a pair of first cancellation coils (4,3) connected to the first deflection coils (7,6) for producing a first cancellation field which tends to cancel a first stray field produced by the first deflection coils (7,6). Support means (10,11) secure the first cancellation coils symmetrically about the longitudinal axis.

Abstract: A vehicle passenger information system, for example an inflight entertainment system, has a combination of improvements for reducing electromagnetic interference ("EMI") and electrostatic discharge ("ESD"). A microprocessor based system controller has a system controller chassis with a first conductive EMI shield layer, a low impedance aircraft chassis ground path directly electrically connected to the shield layer and to controller components. Additionally, a display unit has a chassis with a second conductive EMI shield layer enclosing a plurality of PCBs directly electrically connected to the shield layer. The display unit supports are grounded through a plurality of system connectors penetrating the display chassis and a low impedance display unit ground path directly electrically connects the two shield layers. A method of decreasing the EMI and ESD susceptibility of, and the levels of radiated EMI from, a vehicle entertainment system is also provided.

Abstract: A CPU is designed so as to put a demagnetizing circuit in an operative state in accordance with a result of detecting, among other quantities or events, the number of operations to turn on a power counted by a counter, the lapse of time under a predetermined condition measured by a timer since the pulling-out of an AC plug, the movement of the main body of a display device sensed by a sensor unit, an external magnetic field sensed by a sensor unit or a residual magnetism in a CRT itself sensed by a sensor unit. Instead of carrying out demagnetization each time the power is turned on, demagnetization is performed only under certain conditions when necessary, diminishing the problem of wasteful power consumption. On the top of that, the number of cases in which sound and picture vibration are generated due to a demagnetizing operation carried out right after the turning-on of the power is reduced, resulting in a product easy to handle by the user.

Abstract: A cathode-ray tube display unit provided with a high voltage transformer for supplying high voltage to an anode of a cathode-ray tube, a deflection yoke having a horizontal deflection coil and a vertical deflection coil, and an interior conductive coating formed on the inside of a glass vessel of the cathode-ray tube, in which there is provided an electrode in the conductive coating form formed on an external wall face of a glass vessel at a funnel portion being electrically separated from an exterior graphite coating formed on an external surface of the cathode-ray tube and connected to ground, and a circuit for applying reverse pulse voltage V.sub.1 that satisfies (V.sub.0 .times.C.sub.0)>(V.sub.1 .times.C.sub.1) to the electrode in the conductive coating form is included. Where, it is assumed that flyback pulse voltage supplied to the deflection yoke means is V.sub.0, reverse pulse voltage having a polarity reverse to that of voltage generated in the interior conductive coating is V.sub.

Abstract: A pivotable protective screen structure which is height-adjustable and forward/backward shiftable. The protective screen structure includes a base body, a protective screen body and two support racks. The base body is formed with a slot passing through the entire base body and two pairs of slide channels disposed on two sides of the slot. In each pair of the slide channels are disposed opposite engaging teeth. The protective screen body includes a protective screen and a frame body framing the protective screen. Two shaft rods are disposed on two sides of the frame body. The support rack has two horizontal support levers defining a clearance therebetween and formed with upper and lower engaging teeth for engaging with the engaging teeth of the slide channels of the base body. The support rack further has a vertical rectangular hanging frame connected to front ends of the support levers and communicated with the clearance thereof.

Abstract: A color cathode ray tube display device comprises a color cathode ray tube including a neck portion (1a), a funnel portion (1b), and a panel portion (1c), a compensating coil (7) which generates a compensating magnetic field for eliminating the influence of an external magnetic field that acts vertically on electron beams which will intersect a display screen of the color cathode ray tube (1), a current supply unit (4,5) for passing a sawtooth current synchronized with the vertical deflection cycle of a video signal into the compensating coil (7) so that the compensating coil generates the compensating magnetic field, and a memory (5b) for storing information about the sawtooth current passing through the compensating coil (7).

Abstract: A display comprising a cathode ray display tube (1) having an electromagnetic deflection yoke (2) is described. A pair of first deflection coils (7,6) are located symmetrically about the longitudinal axis of the tube (1) on opposite sides of the yoke (2) for producing within the tube (1) a first magnetic deflection field. A pair of second deflection coils (8,20) are similarly located symmetrically about the longitudinal axis on opposite sides of the yoke (2) for producing within the tube (1) a second magnetic deflection field at right angles to the first deflection field. The display is further provided with a pair of first cancellation coils (4,3) connected to the first deflection coils (7,6) for producing a first cancellation field which tends to cancel a first stray field produced by the first deflection coils (7,6). Support means (10,11) secure the first cancellation coils symmetrically about the longitudinal axis.

Abstract: A display unit of the LCD type having a display side and a rear side. The display side is provided with a first layer that is both transparent and electrically conductive, and the rear side is provided with a layer that is electrically conductive. Both of the electrically conductive layers are electrically connected with each other and are also electrically connected to ground. The conduction of the electrically conductive layers is such as to make lower than 5 k.OMEGA. the resistance from any point on the display side or any point on the rear side to a point at which the conductive layers are connected.

Abstract: A television receiver radiation exposure limiting apparatus including a power supply, a proximity sensor, a rf switch, and a housing wherein the apparatus may be located within a small housing emplaced on the television receiver. The preferred proximity sensor comprises a monostatic infrared type sensor and responds to the comparative infrared signature of a human referenced to the ambient background. The sensor generates an electrical output signal which either stimulates or terminates conduction of electric current in an rf relay or solid state switch whenever a human form is within a preset detection range. A system in which the sensor signal terminates current flow is preferred. The rf relay or solid state switch connects the incoming rf signals representing unprocessed video and audio information to the VHF/UHF input of the television receiver only when no human signature is detected by the proximity sensor.

Abstract: A deflection yoke apparatus has a pair of horizontal and a pair of vertical deflection coils, a coil separator therebetween, and a funnel-shaped deflection core which provides a magnetic path for magnetic flux generated by the deflection coils. A pair of auxiliary coils are arranged at diametrically opposed positions outside the deflection core, and may be energized by the horizontal deflection current supplied to the horizontal deflection coils. The magnetic field generated by the auxiliary coils at least partially compensates the external magnetic leakage field which is radiated outside the deflection core by the horizontal deflection coils. The auxiliary coils have rod-shaped magnetic cores which are in magnetic flux coupling relationship with the smaller end of the deflection core. Leakage flux compensation is thereby achieved with minimal affect on the deflection fields and with low power dissipation in the auxiliary coils.

Abstract: A cathode ray tube device capable of providing sufficient shielding effect against leaking alternating electric field while exhibiting high reliability during long use. Alternating electric field generated by a deflection yoke is sufficiently reduced by the shielding effect produced by a conductive film formed on a funnel portion. A gap formed between the conductive film and an insulating sheet provided between the conductive film and the deflection yoke, due to dimensional error, is filled with insulating silicone grease, so as to avoid secular degradation of insulation which otherwise may occur due to accumulation of dust and other matters.

Abstract: Methods and apparatus for securing a degaussing coil to a cathode ray tube (CRT) are disclosed wherein one or more restraint cables are used together with one or more cable ties to secure and position a degaussing coil onto a CRT. The method and apparatus of the present invention compensate for variations in the length of the degaussing coil without compromising the positioning of the degaussing coil on the CRT.

Abstract: A faceplate assembly has an electrically conductive grid, which is electrically connected to a suitable ground potential, positioned on or above a display screen of an interactive display terminal (IDT) where the grid has a plurality of optical pipes with metal walls, which provide electromagnetic interference (EMI) protection, and with optical cores, which enhance visibility, that optically pipe information originally displayed on the IDT screen which is piped to a viewing plane developed by the grid. A continuous, serpentine electrical conductor is carried by and positioned over the optical pipe walls by a flexible, transparent overlay sheet that can be flexed to bring a selected portion of the electrical conductor into an electrical switch closed position with an adjacent optical pipe wall(s). This selected grid position is electrically measurable and thereby determined.

Abstract: A cathode-ray tube having a layer provided on a face plate outer surface, with the layer comprising at least one colored transparent electroconductive domain consisting of at least one organic dye, at least one electroconductive metal oxide and silica mainly composed of silica gel and at least one non-glare and protective domain consisting of silica mainly composed of silica gel, thereby resulting an a cathode-ray tube having wide and stable optical properties, high contrast, and antistatic property to remove the panel electricity generated by static induction, and an antireflection property.

Abstract: A cathode ray tube device capable of providing sufficient shielding effect against leaking alternating electric field while exhibiting high reliability during long use. Alternating electric field generated by a deflection yoke is sufficiently reduced by the shielding effect produced by a conductive film formed on a funnel portion. A gap formed between the conductive film and an insulating sheet provided between the conductive film and the deflection yoke, due to dimensional error, is filled with insulating silicone grease, so as to avoid secular degradation of insulation which otherwise may occur due to accumulation of dust and other matters.