Abstract: An erasing device for a liquid crystal display image of the present invention is furnished with an auxiliary power source for continuously supplying power source to a liquid crystal display panel for a certain period after the main power source of the main body of the liquid crystal display device is turned OFF. Upon input of a power source OFF signal directing to turn OFF the main power source, a driving signal generating circuit and a driver controller light up the liquid crystal display panel entirely on a saturation voltage of the liquid crystal and subsequently shut off the same entirely using the power supply from the auxiliary power source.

Abstract: The invention is based upon the use of the characteristic of LCD screen which offer the possibility of directing the visibility angle of said screens as a function of the voltage applied. By directing said angle towards one eye or the other of the viewer alternatingly, as a function of previously recorded stereoscopic images and at a sufficiently high rate so that the viewer cannot perceive discontinuities, a tri-dimensional effect in the image received by said viewer is obtained. The block diagram of one of the invention includes an image generating system 2 connected to an LCD screen 1 and to an image synchronization block 3 which is connected to an angle generator system 4, the latter providing the necessary voltages to the screen 1 in order to direct the image from the screen to one or the other eye of the viewer.

Abstract: A voltage supply circuit for an LCD driver employs two voltage dividers. A low current voltage divider includes resistive elements having a high resistance, thus providing a bias voltage with a low current. A high current voltage divider includes resistive elements having low resistances, thus providing a bias voltage with a high current. The high current voltage divider provides bias voltage levels with high current at the beginning of each time phase change. Thus, the liquid crystal display receives a high current when updating the bias voltage levels on the LCD, thereby producing a fast settling time. When the bias voltage levels are held constant, however, only the low current voltage divider provides the bias voltage levels to reduce power consumption. A halt mode prevents the liquid crystal display and driver from consuming any power by disconnecting both voltage dividers from the voltage source when in sleep mode.

Abstract: A photovoltaic module capable of being oriented by hand with respect to the sun, including an infinitely adjustable stand system for locating the module at its optimum orientation with respect to the sun and a multi-volt controller for regulating the power flow between the module and one or more powered devices.

Abstract: An electronic shelf label mounting system which protects an electronic shelf label from damage. The mounting system includes a rail having rounded top and bottom surfaces and a channel containing an electronic display module. In the preferred embodiment, the channel is wider than the electronic display module. A cover protects the electronic display module from damage from causes such as contact with shopping carts. A hinge member pivotally couples the cover to the rail. In a second embodiment, the cover is hingeless. The preferred embodiment further includes wireless electrical connections between the electronic display module and the rail, including power and signal connections, and ground connections at a location sufficient to minimize static discharge between the ground connections and the power and signal connections. The preferred embodiment also includes a downwardly biased flexible locking pawl for locking the electronic display module in the channel which engages a groove within the channel.

Abstract: An LCD Driver System (10) includes a row decoder (38) for providing command signals to row drivers (50) and a RAM row decoder (64) for controlling a RAM (76) which supplies data to a column driver (88). The row and column drivers (50 and 88) are supplied with power by a power source (58) which can supply either high or low voltages. In normal mode, the power source (58) supplies high voltage and the row driver (50) drives both a dot matrix portion (14) and an icon portion (16) of an LCD display. In an icon mode, a disable signal disables the row decoder (38) and the RAM row decoder (64), enables only the icon row driver (54) of the row drivers (50) and the icon row of the RAM (76) and switches the power source (58) to supply low voltage so as to save power.

Abstract: The invention is directed to simultaneously implement display by using the first and second liquid crystal display sections. While a voltage (1/2 V.sub.L) which is a half of a drive voltage V.sub.L supplied from the second drive power supply by the second liquid crystal driver is taken as a virtual ground, a voltage (1/4 V.sub.L) resulting from positively and negatively dividing by 4 the drive voltage V.sub.L is applied to each of electrodes of the second liquid crystal display section defined in the liquid crystal display panel. In a selected waveform, by applying a voltage which exceeds the saturation voltage of liquid crystals, to selected portions of the waveform, the liquid crystals are turned on. In a non-selected waveform, such a voltage is not applied. In the second liquid crystal display section, direct current component of the waveform of a signal supplied by the second liquid crystal driver is cut off by the direct current cutoff circuit. A bias voltage (1/2 V.sub.

Abstract: A driver circuit for a liquid crystal display device has an output terminal, an N-MOS transistor, a P-MOS transistor, a first semiconductor switch connected between the output terminal and the N-MOS transistor and, a second semiconductor switch connected between the output terminal and the P-MOS transistor. Each of the N-MOS transistor and the P-MOS transistor have source, drain, gate and substrate, and form a power source portion taking the source as an output side. The first and second semiconductor switches have control inputting means for inputting a switching control signal for alternately outputting the output voltages of the N-MOS transistor and the P-MOS transistor through the output terminal. The drain, gate and substrate voltages are set so that the output voltage output from the N-MOS transistor is greater than the output voltage output from said P-MOS transistor.

Abstract: In a liquid crystal display (16) having rows and columns of pixels (22), one or more selected rows of pixels are turned off (put in a standby mode) in a manner that saves power. A row of pixels is turned off by applying to the row a cyclical two-level voltage (BP2) having a magnitude that, when combined with voltages (FP3) applied to columns, results in each pixel in the selected row receiving a combined voltage (BP2-FP3) having a reduced number of transitions (30), having a magnitude that is insufficient to turn on a pixel, and having an average value of substantially zero over a cycle. The method is incorporated in a liquid crystal display apparatus (32) having a mode control (54) for switching selected rows of pixels between an active mode and a standby mode.

Abstract: The present invention relates to an apparatus for sequentially controlling power to operate an LCD module through the internal circuit of an LCD controller, and comprises a timing and comparing means for receiving a timer value and a clock signal from an external circuit and outputting a match signal to control a time interval to sequentially generate said enable signals and to sequentially disable said enable signals; a display control means for controlling said display responsive to a display control signal, a write control signal and a reset signal from said external circuit; a power sequence FSM (finite state machine) for receiving the output of said display control means, said match signal from said timing and comparing means, said clock signal from an external circuit and a FSM reset signal, and outputting a clear signal to said timing and comparing means or outputting a first and second power enable signals and a control enable signal to said display; and a FSM reset signal generating means for receivi

Abstract: In the case where a fed display data is to be displayed as it is, a display operation is executed in accordance with a predetermined first clock signal. In the case where a calculation operation is executed based on the fed display data and the calculation result is to be displayed as a display data, the display operation is executed in accordance with a second clock signal having a frequency higher than that of the first clock signal. In this way, the second clock signal is fed to a display device only when the calculation operation which requires a high speed processing is executed. Accordingly, power consumption can be reduced and an improved quality of display can be obtained. Further, an inversion signal is fed to the display device together with a display signal and a scan signal. The inversion signal is used for periodically switching the polarity of the display signal applied to the display device so as to prevent an occurrence that a direct current is applied to the display device.

Abstract: In a projector, green CRT projection tubes for displaying pictures for the right and left eyes are arranged on the right and left sides with respect to a screen respectively, while a red CRT projection tube for convergence adjustment is arranged at the center. Further, the projector includes polarizing filters which are provided on respective front surfaces of the CRT projection tubes, a triple two-input one-output type selector switch, and a convergence adjusting picture signal source. In general, a right eye picture signal from a right eye picture signal source is supplied to the CRT projection tube through the selector switch, while a left eye picture signal from a left eye picture signal source is supplied to the CRT projection tube through the selector switch. At this time, the observer can visually recognize a stereoscopic monochromatic picture through polarizing glasses.

Abstract: In accordance with one aspect of the invention, a liquid crystal display driver for driving liquid crystal display electrodes, comprises: a voltage signal generator adapted to provide a predetermined voltage signal to the liquid crystal display electrodes, the voltage signal generator being further adapted to be activated when the voltage signal level of said electrodes is outside a predetermined dead zone region, the voltage signal generator being deactivated when the voltage signal level of the electrodes is substantially within the predetermined dead zone region; and a switch adapted to couple the voltage signal generator to at least one of said liquid crystal display electrodes.

Abstract: A circuit for driving an AC TFEL device which is a complete solid luminescence element, capable of generating positive and negative AC voltages from a single DC voltage by utilizing a relative potential difference and thereby providing a compact voltage supply unit required for driving the AC TFEL device. A circuit is also provided which is constructed to reduce the number of operating voltages required in the refresh drive method and the scan inversion symmetric drive method upon driving the matrix of the AC TFEL device by using a relative potential generating circuit. By employing such a circuit, it is possible to simply provide a voltage supply circuit required in a portable display system using the AC TFEL device and supply a voltage required for the refresh driving and the scanning sequence inversion driving by using only one clock control signal.

Abstract: A display device has a reverse polarity LCD panel separated from a cavity by a light diffuser. A plurality of LEDs mounted in said cavity are interconnected to a common constant current source.

Abstract: The data selection circuit of 1/n Duty-1/m Bias activating scheme of the present invention includes (m+1) selectors which are independently provided. Each selector includes 2.sup.n decoder sections for subjecting n-bit select data supplied from the exterior to different decoding processes, and 2.sup.n inverter sections respectively connected in series with the decoder sections, outputs of the inverter sections being connected in a wired OR connection configuration. The 2.sup.n .times.(m+1) inverter sections are supplied with different preset input signals determined by integers m, n (m.gtoreq.2, n.gtoreq.2) and the logic of the corresponding decoding sections from the exterior. Thus, the data selection circuit of 1/n Duty-1/m Bias scheme in which the number of necessary transistors is significantly reduced can be provided.

Abstract: A liquid-crystal display according to this invention which incorporates timing signal generation circuit 13 which turns on switches 10 to 12 when interval control signal P from the liquid-crystal power supply circuit is in active status, and which turns switches 10 to 12 off when interval control signal P is in inactive status. By turning switches 10 to 12 off when no display is required, current flow from power supply 3 to ground (GND) is cut and power consumption is reduced.