Abstract: A multi-lamp backlight apparatus is disclosed. The multi-lamp backlight apparatus includes 2N lamps, N balancing transformers, and a high-voltage power source. N is a positive integer and k is an integer index ranging from 1 to N. The kth balancing transformer among the N balancing transformers includes a first primary winding, a second primary winding, and a secondary winding. The first primary winding connects in series with the (2k?1)th lamp of the 2N lamps. The second primary winding connects in series with the first primary winding and the (2k)th lamp. The secondary winding corresponds to the first primary winding and the second primary winding. The high-voltage power source is connected between the first primary windings and the second primary windings.

Abstract: A buffer circuit is driven with a low voltage and operates at a high speed has first and second comparators constituted by P channel and N channel MOS transistors provided between an input terminal and an output terminal of a buffer amplifier. A predetermined offset voltage is set for the comparing operation, and a switch circuit turns ON/OFF in response to an output signal from the first comparator and the output signal of the second comparator. A leading up of an output voltage from the buffer amplifier is accelerated by the current flowing from a power source line to the output terminal. The buffer circuit also includes an operation restricting circuit for restricting the comparing operation of the second comparator in a range of a dead band of the transistors.

Abstract: A backlight unit includes: a power supplying part; a non-dimming point light source receiving power from the power supplying part and providing a feed back signal to the power supplying part; a dimming control part outputting a dimming signal; and a plurality of dimming point light sources receiving power from the power supplying part, and receiving the dimming signal from the dimming control part.

Abstract: An information processing system including a host device and a client device which requests the host device to process information, includes: a communication unit which provides communication between the host device and the client device, wherein the host device includes: a communication completion judgment: unit which judges whether or not first communication information to be transmitted and received via one round of communication provided by the communication unit has all been transmitted or received; and a communication information process determination unit which, in the event that the communication unit is unable to transmit or receive the first communication information before it is judged by the communication completion judgment unit that the first communication information has all been transmitted or received, determines a process related to the first communication information in accordance with second communication information received via a next or subsequent round of communication.

Abstract: An apparatus and method for controlling standby mode in an electronic device. In standby mode, power and clock signals are reduced or stopped to conserve power. The apparatus includes an initiator module coupled to a power and clock control module (PCCM). When the initiator module meets conditions for standby mode, the initiator module sends a standby signal to the PCCM and does not interact with other initiator, target, or interconnect modules. When the PCCM communicates a wait signal, the initiator module enters standby mode. When the initiator module detects a wakeup event, the standby signal is deactivated. In this state, the initiator module may process information but may not interact with other modules. When the PCCM deactivates the wait signal and returns power and clock signal to steady state levels, initiator module may resume normal operation.

Abstract: An AMOLED panel includes an AMOLED pixel unit, a scan driving unit and a data driving unit. The scan driving unit is coupled to the AMOLED pixel unit. The data driving unit is coupled to the AMOLED pixel unit and a voltage source and includes a switch and a DC-to-AC converter. The switch has a first terminal coupled to the AMOLED pixel unit and a second terminal coupled to the voltage source. The DC-to-AC converter has n+1 bytes, wherein n is a positive integer. The DC-to-AC converter is coupled to a control terminal of the switch and outputs a variable voltage to turn on the switch to make the switch generate a data current. The DC-to-AC converter changes a magnitude of the variable voltage to control a magnitude of the data current.

Abstract: In order to prevent a gradation shift due to variations in the thickness of a film used to form an auxiliary capacitor, a detection capacitor having a layer structure similar to that of the auxiliary capacitor placed for each pixel is provided on an array substrate. Furthermore, the capacitor value of the detection capacitor as a representative of the plurality of auxiliary capacitors is detected, and the potential amplitude ?Vcs of a power supply line connected to the auxiliary capacitor is adjusted based on this detected value.

Abstract: A power source apparatus for a display is provided, which comprises a voltage generating section capable of controlling outputting or output termination of one or more predetermined output voltages, and a switching section provided between an output terminal of the predetermined output voltage and a predetermined reference potential terminal. The switch section is turned from OFF to ON when the voltage generating section performs the output termination control.

Abstract: An integrated portable computer projector system comprises an image projector integrally couplable to a computer device.

Abstract: An OLED (organic light-emitting diode) passive-matrix display includes a display portion and a driver portion. The display portion includes a matrix of OLEDs for displaying information. The driver portion includes a monitor circuit and a voltage adjusting circuit. The voltage adjusting circuit has a power-up portion that generates a supply voltage based on a reference voltage. In response to an indication to switch modes, the voltage adjusting circuit switches to an operational mode wherein the supply voltage is generated based on the maximum voltage drop read across the OLEDs.

Abstract: A control circuit for balancing current in a thin display device includes a light source, a power supply, and a control part. The light source includes a plurality of parallel light-emitting diode (LED) rows. The LED row includes at least one LED and a switch unit. The switch unit is in series connection with the LED. The switch unit has two working conditions, one is on and the other is off, to determine whether the current passes through the LED row. The power supply provides a working power for the LEDs. The control part detects the currents of the LED rows, controls the on-state timing ratio of the switch unit and controls the output power of the power supply.

Abstract: Described herein are systems and methods that reduce power consumption for an electronics device that includes a display device. The systems and methods identify characteristic color video information for a graphics component that allows a person to visually locate the graphics component in a display area for the display device. Video information in the display area other than the characteristic color video information is then altered to conserve power. Preserving the characteristic color video information for the graphics component maintains a person's ability to locate the graphics component at a later time, even though other portions of the display area have been altered and potentially visually degraded to conserver power.

Abstract: A backlighted electronic transmissive display assembly consistent with certain implementations has an electronic transmissive display panel that produces a visual display using light passing through the panel. A solar light collector collects sunlight. Light is received from the solar light collector and supplied as a backlight to the electronic transmissive display panel. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

Abstract: An element driving transistor controls an amount of power supplied from a power supply PVDD to an element to be driven (display element) provided in a pixel of each row. A storage capacitor has a first electrode connected to a gate electrode of an element driving transistor and a second electrode connected to a capacitor line. A voltage level of a capacitor control signal SCn to be output to the capacitor line is set to a voltage level which controls the element driving transistor via the storage capacitor Cs to be periodically switched off. A V driver formed at a periphery of a display portion of a panel has a generator which generates a capacitor control signal SCn using outputs of registers which sequentially transfer and output a signal according to a V start signal STV so that the off-control period of the element driving transistor is determined according to the H level period of the V start signal STV.

Abstract: A backlight unit includes: a power supplying part; a non-dimming point light source receiving power from the power supplying part and providing a feed back signal to the power supplying part; a dimming control part outputting a dimming signal; and a plurality of dimming point light sources receiving power from the power supplying part, and receiving the dimming signal from the dimming control part.

Abstract: An LED interface circuit provides connection options for one or more types of LEDs. In an embodiment, the circuit includes an input node that receives an LED control signal, and an output that has a first output node, and a second output node. A driving circuit is disposed between the input header and the output. The driving circuit has a non-inverted input node and an inverted output node. In an embodiment, the inverted output node is capable of sinking current. The non-inverted input node is coupled to the input header and to the first output node, while the inverted output node is coupled to the second output node. The output of the LED interface circuit is capable of driving a plurality of different types of LED displays.

Abstract: Managing power in a display controller having an on-board power supply coupled to a host device having an off-board power supply by way of a connector is described. If the on-board power supply is active, then power is supplied to the display controller by the off-board power supply by way of the connector and a low frequency clock arranged to provide a low frequency clock signal is turned on. Alternatively, when it is determined that the on-board power supply is active, then power is supplied to the display controller by the on-board power supply only, the low frequency clock is turned off and a high frequency clock arranged to provide a high frequency clock signal is turned on.

Abstract: Disclosed herein are a liquid crystal display device which is capable of maintaining the level of a common voltage applied to a common electrode constant, and a method for driving the same.

Abstract: An emergency lighting with an electrical illuminant (DL1, DL2, DL3), which, as a power supply drops below a predeterminable value, can be connected to an energy source that can be charged from the power supply by means of a charging connection, for example, by means of an electronic switch (T1), where the energy source consists of at least one high-capacity storage condenser (CS; CS1, CS2) and where light-emitting diodes can be provided as illuminants.

Abstract: Provided is an apparatus for controlling multiple powers which is capable of turning on and off the multiple powers in their priorities for systems or components to be supplied with the multiple powers such as a liquid crystal display (LCD) module. In the apparatus for controlling multiple powers, an on-signal of high level is applied to an input terminal, and an output of a control signal generating unit is sequentially changed to a high level whenever a clock is applied to a clock signal input terminal by one period, so that outputs of the multiple powers are sequentially output. In addition, an off signal of low level is applied to the input terminal, and an output of the control signal generating unit is changed to a low level in a reversal order whenever a clock is applied to the clock signal input terminal by one period, so that outputs of the multiple powers are interrupted in the reversal order.

Abstract: An electronic ballast system controls one or more ballasts of HID or fluorescent lamps, which are controlled in an “on/off” manner by a ultra low power controller that is isolated for a primary power circuit or derives its very low switch power from the ballast itself. The on/off control provides a near lossless control system. This system may be applied to electronic ballast for operates at fractional power levels corresponding to different lighting intensities and with conventional occupancy sensors. The system may also be applied to other electronically compatible end-use devices and applications.

Abstract: A driving circuit of a liquid crystal display is provided.

Abstract: An LCD panel module includes a common boosting converter, an LCD boosting circuit, an LDO control circuit, and constant current circuits for parallel-connected LED elements and series-connected LED elements. The LCD panel module is so configured that a type-switching unit can switch over between Type 1 in which the LED elements are connected in parallel and Type 2 in which the LED elements are connected in series. The common boosting converter preliminarily boosts a battery voltage supplied from a lithium ion battery to a low voltage or a high voltage and supplies the boosted voltage to the parallel-connected LED elements or series-connected LED elements respectively. The LCD boosting circuit boosts the low voltage and supplies it to an LCD panel, while the LDO control circuit steps down the high voltage and supplies it to the LCD panel.

Abstract: A projection image display system includes a plurality of emission sources and a power controller capable of programmable emission frame cycles. The power controller can program each of the emission sources to enhance the display performance of incoming video.

Abstract: A driver circuit for driving a display device, and the driver circuit includes a control section, a driving section and a switch. The control section provides an image signal and a first control signal in response to a power signal. The driving section receives the first control signal and the image signal from the control section to output a scan signal or the image signal in response to the first control signal. The switch is coupled to the control section, and provides the control section with the power signal in response to a second control signal so that the power signal is selectively provided to the control section during a predetermined period. Therefore, the power consumption of the display device may be reduced.

Abstract: A circuit arrangement for commutating the AC voltage of a plasma display panel, in which the losses and electro-magnetic interference which occur as a result of the influence of parasitic resistances (coils, supply lines, semiconductor switches) and the attendant hard charging and discharging processes, are substantially avoided. For the charging operation of the capacitor (Cp) of the plasma cells the oscillation circuit is supplied with an auxiliary charging voltage (u1) whose value exceeds 50% of the input voltage (U0). The oscillation circuit for the discharging operation is supplied with an auxiliary discharging voltage (u2) whose value falls short of 50% of the input voltage (U0). The two auxiliary voltages are connected to a DC converter.

Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.

Abstract: This invention provides a method and an apparatus for saving power dissipation during the testing and evaluation of liquid crystal display LCD panels. In addition, this invention provides a method and apparatus of the changing of the order of backplane and segment addressing to reduce the power consumed by LCD panels. The method includes the step of interlacing the access of common or backplane addresses to an LCD. The LCD power saving method also includes the interlacing the access of the RAM data driving the LCD segment drivers. The segment address signals are developed from data read out of a random access memory, RAM. The segment address signals are activated such that alternating LCD panel locations are written with ones and zeros in a checkerboard pattern so as to stress the LCD panel in the worst case. This method provides for the saving of power dissipation during testing and evaluation by reducing the amount of segment switching from once every backplane cycle to once every frame.

Abstract: A method according to one embodiment may include supplying power to plurality of External Electrode Fluorescent Lamps (EEFLs). The method of this embodiment may also include generating signals proportional to the voltage of each EEFL. The method of this embodiment may also include generating a feedback signal indicative of the state of one or more of the plurality of EEFLs based on, at least in part, the value of at least one signal proportional to the voltage of each EEFL. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.

Abstract: A driving circuit for driving a capacitive load promptly to a target voltage is to have a broad dynamic range and achieve a high accuracy output and saving in the surface area with low power dissipation. A first period and a second period are provided in one data driving period. During the first period, a transistor amplifier for driving the load for charging, with a setting drive voltage (V1), and a transistor amplifier for driving the load for discharging, with a setting drive voltage (V2), with V1<V2, are both enabled for actuation and, during the second period, the transistor amplifier performing either the driving for charging or the driving for discharging, and a constant current source, performing the reverse of the operation of the transistor amplifier, are actuated, for driving the load to the target voltage.

Abstract: In the case of supplying voltage to a common electrode which faces a pixel electrode through electro-optical substance while changing the voltage from a first low-potential-side voltage to a first high-potential-side voltage, a second high-potential-side voltage, which is higher than the first high-potential-side voltage, is supplied to the common electrode instead of the first low-potential-side voltage, and the first high-potential-side voltage is then supplied to the common electrode. One of the first high-potential-side voltage and a first intermediate voltage, which is lower than the first high-potential-side voltage but higher than the first low-potential-side voltage, may be supplied to the common electrode before supplying the second high-potential-side voltage to the common electrode.

Abstract: The present invention provides a light emission control device that can drive a plurality of cold cathode fluorescent tubes independently only by connecting a plurality of piezoelectric transformers to only one piezoelectric inverter circuit. A first phase control portion that outputs a signal for changing a phase of the third and the fourth driving control signals with respect to a phase of the first and the second driving control signals to the second driving portion, and a second phase control portion that outputs a signal for changing a phase of the fifth and the sixth driving control signals with respect to a phase of the first and the second driving control signals to the third driving portion are provided in the piezoelectric inverter circuit. Thus, the phase difference of the driving control signals is controlled, so that the output powers to the plurality of cold cathode fluorescent tubes are controlled.

Abstract: An image display apparatus having a plurality of image forming devices. In an output circuit provided between constant voltage supplies and wiring for driving each of the image forming devices, MOSFETs are successively turned on from the one having a higher ON resistance at the time of switching to make a stepwise transition between outputs from the constant voltage supplies, and have steady potential, thereby limiting undesirable variation in signal potential at the time of switching.

Abstract: A driving circuit capable of reducing current consumption is obtained. This driving circuit comprises an analog buffer circuit outputting a signal responsive to the potential of input data while supplying the data to a data line and a buffer control circuit for substantially stopping the analog buffer circuit when not supplying the data to the data line. Thus, the operating time of the analog buffer circuit is minimized, whereby current consumption can be reduced.

Abstract: A method and apparatus matches one or more clock speeds used in, or used by, a graphics accelerator so as to match graphics processing requirements to the speed of the clock source or sources. Clock speed is adjusted under software control to match current requirements. Power is conserved by reducing clock speeds from unnecessarily high rates to a rate that can satisfy current display mode settings and other graphics processing demands.

Abstract: In a liquid crystal display device including a liquid crystal panel for displaying a tone in correspondence with a potential difference between a drain voltage and a common voltage, a drain driver circuit for generating the drain voltage corresponding to display data and applying the drain voltage to the liquid crystal panel, and a gate driver circuit for selecting a scanning line in the liquid crystal panel to which the drain voltage is applied, a power-supply circuit executes a comparative calculation of a reference common voltage and a feedback common voltage, then applying, to the liquid crystal panel, the common voltage obtained as a result of the comparative calculation, the reference common voltage whose potential level having been adjusted, the feedback common voltage is fedback from the liquid crystal panel.

Abstract: Tilt which is inclination of a normal of optical disk relative to optical axis of optical head is corrected with a liquid crystal element. In a driver for the liquid crystal element, a periodic waveform generator generates periodic waveform and an inverting element inverts the periodic waveform. The periodic waveform and the inverted waveform are connected to two ends of a potential divider which provides partial voltages. The periodic waveform is connected to a common electrode of the liquid crystal element, and the partial voltages of the potential divider are connected to electrodes opposing the common electrode. A structure of a driver circuit for each direction is simple. Tilt in a plurality of directions can be performed independently of each other. Spherical aberration is also corrected. When the liquid crystal element is mounted to a fixed component, deterioration due to jitters is reduced.

Abstract: A tolerance-level display portion 12 is provided in a casing 11 of a head 1 of a photoelectric switch. A light reception signal output from the head 1 is transmitted through a cable 31b of a main body 2. The casing 21 of the main body 2 contains a received light amount display portion 22, a tolerance-level display portion 24, adjust switches 28 and setting switches 29. The CPU in the main body 2 calculates a ratio of a light reception signal to a threshold value to obtain a tolerance level, and applies a control signal corresponding to the obtained tolerance level to a variable power supply circuit. The variable power supply circuit applies a variable voltage, which is dependent on the control signal, through a cable 31a to the head 1. The tolerance-level display portion 12 of the head 1 displays a tolerance level on the basis of the variable voltage by turning on the tolerance-level display LEDs 12a, 12b and 12c.

Abstract: The present invention permits quick removal of charge stored in a liquid crystal layer, without depending upon characteristics of individual devices. This is achieved by providing a detector that detects the turning-off of a power supply, and a connection device that, upon detection of the turning-off of the power supply by the detector, connects to a predetermined line either or both of scanning lines to which scanning signals are supplied and data lines to which data signals are supplied, and connecting the predetermined line to a constant potential.

Abstract: A display apparatus is disclosed which uses an improved precharge method and includes a reduced number of precharge switches. A pixel array section includes gate lines disposed in the direction of a row, signal lines disposed in the direction of a column, and pixels arranged in rows and columns at points at which the gate lines and the signal lines intersect with each other. A precharge switch is connected between a precharge line and each of the signal lines. A precharge drive circuit performs batch precharge wherein it drives the precharge switches at a time within a horizontal blanking period preceding to a horizontal scanning period to apply a precharge signal of a first level at a time to the signal lines and sequential precharge wherein it successively drives the precharge switches within the horizontal scanning period to successively apply a precharge signal of a second level to the signal lines.

Abstract: An electro-optical device, such as a liquid crystal display device, includes a plurality of scanning electrodes and a plurality of signal electrodes wherein the plurality of scanning electrodes intersect the plurality of signal electrodes, wherein the scanning electrodes are organized into groups, each group having a plural number of scanning electrodes to be simultaneously selected, and scanning electrodes are selected on a group-by-group basis according to the MLS (Multi-Line Selection) scheme. The amplitude of voltages applied to the scanning electrodes is set to be equal to the amplitude of voltages applied to the signal electrodes. This allows circuits such as driving circuits, or a power supply circuit to be constructed in a simple fashion.

Abstract: A driving circuit includes a driving signal generating circuit which generates a plurality of driving signals; a plurality of switching circuits which are supplied with the driving signals so as to supply driving voltages in response to the driving signals, respectively; an output node which is connected to each of the switching circuits and is supplied with one of the driving voltages selectively; and a control circuit which controls the switching circuits so that any two of the switching circuits are not turned on simultaneously.

Abstract: Opposed electrodes are separately provided correspondingly to a main display area and a sub display area in an active-matrix liquid-crystal display apparatus. The most-appropriate voltages are applied to the opposed electrode corresponding to the main display area and to the opposed electrode,corresponding to the sub display area, according to the size of each pixel zone disposed in each display area.

Abstract: In a pair of spectacles using liquid crystal lenses, an electrical circuit, for controlling the optical transmission of the liquid crystal lenses, controls the amplitude and/or duty cycle of the voltage driving the lens so as to operate the liquid crystal lens in the transition region, between maximum and minimum optical densities.

Abstract: Disclosed is a method of driving an electro-optical device, such as a liquid crystal display device, including a plurality of scanning electrodes and a plurality of signal electrodes which are formed such that the plurality of scanning electrodes intersect the plurality of signal electrodes, wherein the scanning electrodes are organized into groups, each group consisting of a plural number of scanning electrodes to be simultaneously selected, and scanning electrodes are selected on a group-by-group basis according to the MLS (Multi-Line Selection) scheme. The amplitude of voltages applied to the scanning electrodes is set to be equal to the amplitude of voltages applied to the signal electrodes. This allows circuits such as driving circuits, or a power supply circuit to be constructed in a simple fashion. This driving method is also employed to drive an electro-optical device constructed in a multiple-fold matrix structure.

Abstract: The present invention concerns a control device (21) for a liquid crystal display cell (1) including electrodes (1.1a; 1.1b; 1.1c) forming segments and/or symbols. This device includes control means (33a; 33b; 33c) for providing control signals to said electrodes; and a matrix network of connection paths (45; 47; 49; 50) whose columns (49; 50) are connected to said control means, and whose lines (45; 47) are connected to receive address signals and data signals representative of said control signals. This device further includes switching means (52) arranged at each of the intersections of said network, each of said switching means being arranged so as to be able to be switched permanently into the conducting state or the non conducting state, in accordance with a circuit layout predetermined as a function of said cell.

Abstract: A liquid crystal driving integrated circuit (101) mounted directly on a liquid crystal substrate, wherein the integrated circuit (101) comprises a plurality of power supply terminal arrays, each of which include a high voltage power input terminal (102), (112), a low voltage power input terminal (103), (113), and an intermediate voltage power input terminal (130), (131) and a plurality of signal input terminal arrays (104)-(108), (114)-(118). A substantially rectangular integrated circuit chip (101) containing the integrated circuit is divided into two halves along a line (123) intersecting, at right angles, the longer sides of the chip. A first power supply terminal array (102), (103), (130) and a first signal input terminal array (104)-(108) are provided on one half of the divided chip, and a second power supply terminal array (112), (113), (130) and a second signal input terminal array (114)-(118) are provided on the other half thereof.

Abstract: There is provided an active matrix EL display device that can display a clear multi gray-scale color display to reduce the shift in the potential caused by the potential drop due to the wiring resistance of a power source supply line, in order to decrease the unevenness in a display region. A plurality of drawing out ports of the power source supply line are arranged. Further, in the wiring resistance between the external input terminal and the pixel portion power source supply line, potential compensation is performed by supplying potential to the power source supply line by a feedback amplifier. Further, in addition to above structure, the power source supply line may be arranged in a matrix.

Abstract: A portable communication apparatus (1) has a movable cover (16) with a liquid crystal display (19, 20) mounted thereon. The liquid crystal display (19, 20) is double-sided in at least one part (20), hence showing the information both from a front side and from a back side (21). This part of the display (20) is transmissive, and the rest of the display (19) is either reflective or transflective. The information is viewable through a window (22) in the cover (16) when the cover (16) is closed. As soon as the cover (16) changes positions from closed to opened, or from opened to closed, the information will be rotated 180°, so that the information will appear correctly. The portable communication apparatus has means (30, 31) and steps for the rotation of information, which automatically will be initiated, when the position of the cover (16) is detected by a controller (30).

Abstract: A display apparatus displays an image based on image data and distance data concerning each pixel. The display apparatus has a detector, a display data generator. The detector detects a visual range from a viewer's eye to the viewer's point of regard. The generator produces display data based on the image data, the distance data and the visual range. The display apparatus further has an image display, projector and controller. The image display displays an image based on the display data. The projector projects the displayed image as a virtual image. The controller controls a projection distance of the virtual image so that the virtual image is projected onto the point of regard.