摘要:
A substantially U-shaped gas discharge lamp (1′), containing mercury for the gas discharge, is connected to a high-frequency driver circuit (6′). To ensure that the gas discharge lamp operates with minimum loss and maximum light yield, the respective output terminals (4′, 5′) of the high-frequency driver circuit are not electrically grounded and the central section (11′) of the gas discharge lamp is capacitively coupled to an electric ground. A substantial reduction of lamp current in the central section is ensured, thus lowering thermal production in the central section of the gas discharge lamp. Accordingly, the central section becomes the coldest place in the gas discharge chamber and the place where condensation of the mercury occurs. The mercury vapor pressure can thus be regulated and the light yield optimized.
摘要:
The present invention relates to the adjustment of luminance. The present invention is a method of manufacturing image forming apparatus including a step of applying characteristic shift voltage comprising a plurality of pulses in which the amplitude of the pulse obtained from the look-up table has two or more values, to the emitter, the look-up table storing the amplitude of the pulse and the number of the pulse for shifting characteristic of emitters to a predetermined luminance target value on the basis of the measurement result of the luminance. Moreover, the present invention is a method of manufacturing image forming apparatus comprising a step of applying the second pulses of characteristic shift voltage having the amplitude which was determined in response to the measurement result of the luminance after the first characteristic shift voltage had been applied to the emitter.
摘要:
A communications system that includes one or more free space electron switches. The free space electron switch employs an array of electron emitters, where each emitter is responsive to an RF or optical input signal on an input channel. Each emitter includes a cathode that emits electrons in response to the input signal. Each emitter further includes a focussing/accelerating electrode for collecting and accelerating the emitted electrons into an electron beam. Each emitter further includes an aiming anode that directs the beam of electrons to a desired detector within an array of detectors that converts the beam of electrons to a representative RF or optical signal on an output channel. Each emitter may include a modulating electrode that generates an electric field to modulate data onto the beam of electrons. The communications systems employing the switch can be an ISDN, DSLAM networks, packet routing systems, ADSL networks, PBX systems, local exchange systems, etc.
摘要:
An AC powered light emitting device is provided. The device includes a plurality of organic light emitting diode (OLED) modules. The modules are arranged into groups of modules where the individual modules of the groups are electrically connected in series. The device may be powered using AC power. A display is also provided. The display includes a plurality of OLED modules arranged to spell out a letter or depict an image.
摘要:
The present invention relates to a flat display panel device for compensating a threshold voltage of a panel. Because of an ability of compensating the panel threshold voltage, it is possible to simplify a circuit and a driving method, enhance particularly an image quality of a display unit and increase an opening ration of the panel.
摘要:
A plasma display panel, including a pair of substrates arranged having a predetermined distance between them, a plurality of first electrodes formed on one of the substrates and a plurality of second electrodes formed at a predetermined interval on the other substrate, wherein the second electrodes intersect the first electrodes. The panel further includes a dielectric covering the first and second electrodes, wherein the dielectric is formed on each of the pair of substrates, a barrier rib formed between the pair of substrates and a phosphor layer coated on the barrier rib, wherein discharge cells are formed at the intersections of the first and second electrodes. The panel also has a sealant coated on marginal portions of the panel that seals the panel, a discharge gas injected with a predetermined pressure into the inside of the panel, and a pressure adjusting means for adjusting the pressure of the injected discharge gas in the plasma display panel.
摘要:
An active matrix display is provided which eliminates variation of a threshold voltage of an active element inside a pixel and variation of a driving current due to the Early effect and supplies a desired driving current to a light emitting element of each pixel steadily and accurately. The active matrix display has a current-voltage converter arranged in series in a supply path through which a driving current is supplied to a light emitting element and has a voltage control current source that is controlled by an output voltage of the current-voltage converter, thereby generating a monitor current having correlation with the driving current at the time of setting the driving current, controlling a gate voltage of a driving current generating transistor based on the monitor current such that a desired luminance can be realized and holding the control voltage in a capacitor.
摘要:
An electroluminescent driver circuit with improved power consumption efficiency. In one embodiment, an electroluminescent driver circuit comprises a load to provide illumination, an inductor, a transistor and a plurality of switches. The inductor has a first side coupled to a positive terminal of a power supply and a second side selectively coupled to the load. The transistor is coupled to selectively conduct current from the second side of the inductor to a ground terminal of the power supply in response to a digital signal. The plurality of switches are coupled to the load to selectively charge and discharge the load. Moreover, the switches selectively provide a discharge path for positive charge on the load to be discharged to the positive terminal of the power supply.
摘要:
A high-resolution field emission display that applies a field emission device (or a field emission array) being an electron source element to a flat panel display device. The field emission display includes an upper plate and a lower plate that face each other, wherein the lower plate and the upper plate are vacuum-packaged in parallel positions. A dot pixel of the lower plate includes a high-voltage amorphous silicon thin film transistor formed on the glass substrate of the lower plate, a diode type field emission film partially formed on the drain of the high-voltage amorphous silicon TFT, a passivation insulation layer formed on the high-voltage amorphous silicon TFT and the lateral side of the diode type field emission film, and an electron beam focusing electrode/light-shading film which vertically overlaps with the high-voltage amorphous silicon TFT on some parts of the passivation insulation layer and is formed on a lateral side of the diode type field emission film. A dot pixel of the upper plate includes a transparent electrode formed on the glass substrate of the upper plate, and a red, green or blue phosphor formed on some parts of the transparent electrode. Therefore, the high-resolution field emission display device can obtain an effect of focusing the electron beam trajectory and a light-shading effect for the TFT at the same time, and thus remarkably enhance the performance and the resolution of the field emission display.
摘要:
A PDP apparatus in which degradation in image quality such as display missing points does not occur, even if the peak luminance is increased, has been disclosed. In the PDP apparatus, the display load ratio of each subfield is detected and a sustain pulse cycle is changed according to the display load ratio of each subfield. Moreover, an adaptive sustain pulse number change means is provided, which calculates the total amount of variations in time by summing the variations in time in a display field caused by the changes in the sustain pulse cycles and increases/decreases the number of sustain pulses of each subfield according to the total amount of variations in time.