143 results about "Vacuum fluorescent display" patented technology

The present invention provides methods and apparatuses for determining a liquid level inside a container by using an effective capacitance associated with one or more sense electrodes that are located inside the container. Embodiments may support different types of liquids, including water, and support different electrical appliances, including electric kettles, coffee makers, and water treatment appliances having a non-transparency housing such as stainless steel and black color Lucite or glass that cannot directly indicate the water level. A value of capacitance characteristic associated with a sensing electrode is determined. The water level may be displayed to the user on any kind of electronic panel, e.g., liquid crystal display (LCD), light emitting diode (LED) display, or vacuum fluorescent display (VFD). Also, a correction factor may be applied to a determined capacitance associated with a sensing electrode to compensate for the operating temperature of the sensor electrode and the liquid.

A navigation system with a portable heads up display (HUD). The HUD comprises a housing rotably mounted on a stand. The housing holds a device for generating an image that can be projected onto a vehicle windshield, for example a vacuum fluorescent display (VFD) module. Preferably, the navigation system is a NavMate® Navigation System from Visteon Technologies LLC, and the HUD is operatively connected to the navigation system by a high speed serial interface, for example an RS232 interface. An exemplary HUD includes a microcontroller, frame buffer, and a graphic display module. A preferred image generator is a Futaba GP1045A02A graphic display module.

The invention relates to the determination of acceleration parameter range in the acceleration service life test of vacuum fluorescent displays (VFD) and discloses a method that comprises the following steps: (1) the service life of the VFD is described by applying the Weibell distribution function; (2) a shape parameter m and a size parameter Eta of the Weibell distribution are estimated by adopting the maximum likelihood method; (3) the range of an acceleration parameter Beta in the acceleration service life test of the vacuum fluorescent display is calculated by combining Arrhenius equation and the least square method. The method calculates the range of the acceleration parameter Beta in the acceleration service life test of the vacuum fluorescent display based on the maximum likelihood method, thus estimating the service life of the VFD in a short time, saving time for the service life test and lowering service life prediction cost.

Nano-particles of an electrically conductive oxide adhere to the surface of particles of a phosphor for low-voltage electron beams. The average diameter of nano-particles of the electrically conductive oxide is in the range of 5 to 100 nm. The weight percentage of the nano-particles of the electrically conductive oxide to the entire phosphor is 0.01 to 10. A vacuum fluorescent display uses the phosphor for low-voltage electron beams.

The invention relates to a prediction method of the life of vacuum fluorescent display (VFD), which uses the weibull distribution to describe the life of the VFD. The maximum likelihood method is used to estimate the parameters so as to predict the average life span of the VFD under the condition of accelerating temperature stress T; finally the predicted average life span is applied to the formula of average life under the normal stress of the VFD (Mu 0 is equal to Tau square Mu) so as to acquire the average life of the VFD under the normal stress. Thus the prediction method can realize the estimation of the life of the VFD in a short period of time, saves the life testing time, and reduces the life predicting costs.

The present disclosure relates to a producing method for oxynitride or nitride phosphor powders which can be used in displays such as vacuum fluorescent display (VFD), field emission display (FED) and LED display devices, or in lighting devices such as cold cathode fluorescent lamps (CCFL) and LED lamps, or in light-emitting apparatuses such as back-lights, wherein the producing method for phosphor powders comprises the step of subjecting part or all of a metal oxide to nitriding by calcining in an atmosphere containing nitrogen, using a fine carbon substance.

The invention relates to the field of measurement tools, in particular to a flux-gate type wide-range magnetometer which is characterized in that a magnetic field measurement circuit comprises an oscillation excitation circuit, a filtering, phase-sensitive demodulating and integrating circuit, a feedback circuit and a calibrating circuit, wherein the oscillation excitation circuit is connected with the probe and the filtering, phase-sensitive demodulating and integrating circuit, and the calibrating circuit is connected with the oscillation excitation circuit. The invention has the advantage of realizing three-component high-resolution (1nT) and high precision (0.2%) measurement of a strong magnetic field with a range of -2000mu T-2000muT. An embedded control system structure is adopted in the flux-gate type wide-range magnetometer, the characteristics of VFD (Vacuum Fluorescent Display) large-screen display, convenience for operation and visual display are obtained, and functions of automatic zero calibration and automatic measurement are achieved. The flux-gate type wide-range magnetometer is stable and reliable, can be used for carrying out measurement and recording automatically for a long time, provides multiple forms of communication interfaces such as internet, USB and RS-232 communication interface, and has the advantages of small volume and light weight.

A power supply circuit for a vacuum fluorescent display includes a boosting coil, input terminal, switching transistor, PWM control circuit, boosting circuit, first filament terminal, and second filament terminal. The boosting coil is provided in a current path to generate an induced voltage in accordance with a change in current flowing therein. The input terminal receives a DC voltage to be applied to one terminal of the boosting coil. The switching transistor is provided between the other terminal of the boosting coil and a ground line. The PWM control circuit periodically turns on/off the switching transistor. The boosting circuit generates a boosted voltage on the basis of an induced voltage generated at the other terminal of the boosting coil when the switching transistor is switched from ON to OFF. The first terminal is connected to the node between the other terminal of the boosting coil and the switching transistor. A DC voltage lower than the induced voltage generated at the other terminal of the boosting coil is applied to the second terminal.

PROBLEM TO BE SOLVED: To provide a glass composition which is used for forming a dielectric body or a partition wall of a plasma display panel, a fluorescent indicator tube or a field emission display, does not contain harmful matters and causes little environmental load, and to provide a glass paste composition which can greatly reduce the warping of the substrate by using this glass composition. ŽSOLUTION: The glass composition is one that does not substantially contain Pb and Bi and has a glass transition point of 430°C-540°C, and it is characterized by containing 1-15 mol% of SiO<SB>2</SB>, 10-50 mol% of B<SB>2</SB>O<SB>3</SB>, 30-50 mol% of ZnO, 0-12 mol% of an oxide of an alkali metal:R<SB>2</SB>O (in the formula, R exhibits at least one alkali metal selected from among K, Na and Li), and 3-20 mol% of BaO in terms of oxides. Ž

A vacuum fluorescent display includes a display portion, filament cathode, grid, and a pair of filament support members. The display portion is arranged on a substrate and has an anode coated with a phosphor material in accordance with a pattern to be displayed. The filament cathode is applied above the anode of the display portion to be separate from the anode. The grid is arranged between the anode of the display portion and the filament cathode, and cooperates with the corresponding anode to display a predetermined pattern. The pair of filament support members are connected to an outside and extend the filament cathode. Part of the filament support members is clamped between a front glass plate and glass spacer and is extracted to outside.

The present invention provides a vacuum fluorescent display driving apparatus and a vacuum fluorescent display driving method that may prevent generation of excessive load on power lines employed in driving, without causing an increase in size of the apparatus. The vacuum fluorescent display driving apparatus of the present invention includes, a grid driver that applies a driving voltage to plural grid electrodes respectively provided in the vacuum fluorescent display, and a grid driver limiting section that performs limitation on the number of grid electrodes to which voltage is applied simultaneously by the grid driver, to less than a predetermined first threshold value.

A power supply circuit for a vacuum fluorescent display includes a boosting coil, input terminal, switching transistor, PWM control circuit, boosting circuit, first filament terminal, and second filament terminal. The boosting coil is provided in a current path to generate an induced voltage in accordance with a change in current flowing therein. The input terminal receives a DC voltage to be applied to one terminal of the boosting coil. The switching transistor is provided between the other terminal of the boosting coil and a ground line. The PWM control circuit periodically turns on/off the switching transistor. The boosting circuit generates a boosted voltage on the basis of an induced voltage generated at the other terminal of the boosting coil when the switching transistor is switched from ON to OFF. The first terminal is connected to the node between the other terminal of the boosting coil and the switching transistor. A DC voltage lower than the induced voltage generated at the other terminal of the boosting coil is applied to the second terminal.

A transparent conductive layer composition, a transparent conductive layer formed of the composition, an image display having the transparent conductive layer are provided. The transparent conductive layer composition contains a composition for a conductive layer and a composition for a transparent coating layer formed on the conductive layer. The transparent coating layer composition includes an amino compound, such as 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldimethoxysilane, N-(6-aminoethyl)-3-aminopropyltrimethoxysilane, and p-aminophenyltrimethoxysilane, a metal compound, such as tetraethyl orthosilicate, and a polar solvent. The transparent conductive layer formed of the composition has a low resistance and strong film hardness and is less reflective and cost effective. The transparent conductive layer can be used on the front panel surface of an electrical image display device, including a cathode ray tube, a vacuum fluorescent display, a plasma display, and a liquid crystal display, to effectively shield electromagnetic waves and an electromagnetic field formed due to the emission of electromagnetic waves.

Provided is a silicon nitride powder for siliconitride phosphor having high luminance, a Sr₃Al₃Si₁₃O₂N₂₁ phosphor and a β-Sialon phosphor using the powder, which can be used for vacuum fluorescent displays (VFDs), field emission displays (FEDs), plasma display panels (PDPs), cathode ray tubes (CRTs), light emitting diodes (LEDs), or the like, and processes for producing these phosphors. The silicon nitride powder for the siliconitride phosphors is a crystalline silicon nitride powder for use as a raw material for producing siliconitride phosphors including a silicon element, a nitrogen element, and an oxygen element, and has an average particle diameter of 1.0 to 12 μm and an oxygen content of 0.2 to 0.9% by weight.

This present invention provides a navigation image display apparatus and method thereof. The navigation image display apparatus comprises a Vacuum Fluorescent Display (VFD) module and a control module. The VFD module comprises at least one electric emitting part connected to a power source for generating a plurality of electrons; and a display part having a plurality of display areas which display images based on the electrons. The control module is operable to control the brightness of the display areas for displaying a navigation image. Preferably, the navigation image can comprise at least one image of turning left, straight ahead only, turning right, U turn left or U turn right, etc.

Luminance life can be enhanced in a vacuum fluorescent display that is driven according to a dynamic drive scheme and that uses a phosphor having remarkable luminance saturation. A drive method for a vacuum fluorescent display, having causing a phosphor layer formed on an anode to display under low-energy electron excitation by the dynamic driving, wherein the phosphor included in the phosphor layer is a phosphor in which the luminance increases when a pulse width is reduced under conditions in which the Du is kept the same in the dynamic driving, and in which, after a voltage is applied to the anode and the luminance of the phosphor is saturated, the time at which the luminance value decreases to 10% of the saturation luminance value following stoppage of the voltage application is 200 μsec or more; and wherein the pulse width and pulse repetition period in the dynamic driving are made variable in the direction of maintaining the initial luminance of the phosphor as driving time elapses.

The present invention relates to a zinc oxide phosphor characterized by emitting visible light with a broad emission spectrum close to white, and a process for producing the same. A powder prepared by adding a plurality of additives to zinc oxide and heat-treating the resulting mixture is further hydrogenated to improve the luminous efficiency of the zinc oxide phosphor. The zinc oxide phosphor providing a broad emission spectrum covering a wavelength range over substantially the entire visible region can be applied to a white diode, a white vacuum fluorescent display, and a fluorescent paint.

This invention relates to a plasma TV, especially to an electromagnetic wave shielding structure that can connect the electric guard board to the background of the vacuum luminescence display to shield the electromagnetic wave. And this invention is composed of the internally-arranged tuner with the TV capability and the plasma display device installed the VFD-vacuum luminescence display for constructing the front display window, wherein at the back of the vacuum luminescence display, the external face that covers the vacuum luminescence display can connect with the guard board of the contacting part, wherein the guard board is used to connect with the back cover, case, supporting board or filter, so the electromagnetic wave produced from the device won't leak out through being conducted to the back cover and case.

The distance between filamentary cathodes and a phosphor on an anode substrate can be reduced by shortening the distance between the filamentary cathodes and a grid. To obtain high luminance without loss of display quality, the present invention provides a vacuum fluorescent display (1) with a driver IC, comprising a display unit (3) provided with a phosphor layer on an anode substrate (2), a plurality of filamentary cathodes (5), a grid (4), a driver IC (6), and a filament support (7) for shielding the IC and supporting an end part of the filamentary cathodes. The end part of the filamentary cathodes is fixed to one short side of the vacuum fluorescent display at a long side of the filament support. Depressions are provided to a surface of the filament support, or slits are provided to the filament support.