Abstract: Provided are image display apparatus and image display methods capable of suitably making correction for variation of driving conditions due to an electric resistance of matrix wiring of a display panel by downsized hardware. The apparatus and methods involve a device of calculating voltage drop amounts caused by the resistance of row wires, for input image data, and a device of calculating image data with correction for the voltage drop amounts (corrected image data). An overflow processing circuit is provided so as to prevent overflow of the image data after the correction from an input range of a modulator, and the overflow is prevented by a gain. Since a gradation converter for changing a gradation conversion characteristic by a gain is provided in the stage preceding to the configuration for making the correction for influence of the voltage drop, it becomes feasible to cancel saturation characteristics of phosphors and to display images with high quality thereby.

Abstract: A liquid crystal device having a display section provided with a plurality of X electrodes and a plurality of Y electrodes, a master X driver IC and a slave X driver IC for driving the X electrodes, and a Y driver for driving the Y electrodes. The master IC has a display control signal generation section which generates a display control signal based on a signal from an external MPU and an output terminal (or input/output terminal) which outputs the display control signal. Each of the master IC and slave IC has an input terminal for receiving the display control signal from the master IC through an external wiring. This liquid crystal device can eliminate a luminance difference within the display screen driven by the master IC and the slave IC.

Abstract: Liquid crystal display with conductive segments for representing symbols which also has at least one inverse segment that fills at least in part the display area that is not covered by the remaining segments. This liquid crystal display allows a simple, visual detection of faulty segments. For this purpose a check is carried out in which all segments and all existing inverse segments are activated which results in a homogenous image when the display is completely functional or the faulty segments are inversely displayed in relation to the remaining display surfaces.

Abstract: An electro-optical device with a pixel portion of enhanced definition is provided, which uses pixels having a novel structure so that the number of stages of a source signal line side driver circuit is reduced to half the number of pixels in the horizontal direction, thereby making a space for placing the driver circuit and increasing the aperture ratio. One horizontal period is divided into the former half and the latter half. Signals for two adjacent pixels are successively inputted to one source signal line. A pixel selecting portion is provided between the two adjacent pixels. The signal selecting portion selects one of the pixels in the former half of one horizontal period so that a signal is written in the pixel whereas it selects the other pixel during the latter half of the horizontal period so that a signal is written in the pixel. Since one source signal line is shared between two adjacent pixels, the invention is advantageous also in terms of aperture ratio.

Abstract: An input digital video signal is allotted by a first multiplexer (310) between regions of a display area to be driven in a dividing manner and is sequentially input to a first memory portion (30A) or a second memory portion (30B). Each of the first and second memory portions (30A and 30B) comprises an input-side line memory (32) composed of, for example, 400-stage input side shift register to which said digital video signal is sequentially input, and an output-side line memory (34) for receiving the data transferred in parallel from the input line memory (32) to serially output the stored data from a selected one of output portions (Out1-4) provided at the 320th, 256th or first stage FF34. The output portion of the memory (34) is thus selected by selectors (380A, 380B) in accordance with the number of pixels in the horizontal direction of the LCD panel, such that LCD panels having the different numbers of pixels can be driven with the same structure.

Abstract: Provided is a display device having a storing circuit 21 section for storing image signals for controlling display and an active device section 22 for performing display control on the basis of the image signals stored by the storing circuit section 21, provided in each dot as a minimum unit of display, thereby achieving space saving.

Abstract: A display device includes a substrate (100), pixel electrodes (PIX) formed on the substrate (100), scanning lines (G) to transmit scanning signals, signal lines (S) divided into four groups (LL, LR, RL and RR) to transmit data signals, signal line driving circuits (112) to drive the groups (LL, LR, RL and RR) of the signal lines (S), respectively, analog switch control signal lines (107 and 108) connected between the signal line driving circuits (112) and the groups (LL, LR, RL and RR) of the signal lines (S), and transistors (ASW) connected between the analog switch control signal lines (107 and 108) and the groups (LL, LR, RL and RR) of the signal lines (S) to provide the data signals to the pixel electrodes (PIX) in response to the scanning signals.

Abstract: To provide a highly-reliable testing method of a level shifter, a driving circuit of an electro-optical panel includes a shift register, a level shifter, and a logic operation device. The shift register sequentially outputs first transfer pulses from a plurality of stages. The level shifter shifts the voltage level of each of sequentially-output first transfer pulses thereby outputting a sequence of second transfer pulses as driving signals. The logic operation device performs a logic operation on sequentially-output second transfer pulses thereby outputting test signals the number of which is smaller than the number of stages of the shift register.

Abstract: A control section 130 for outputting a selection signal for selecting the display areas of the display section 110 and transferring display data classified in response to the display areas and the display type to both or either of a display data processing section A 140 and a display data processing section B 133, the display data processing section A 140 and the display data processing section B 133 for converting the display data into a format fitted for the display area and the display type, a data transfer path 160 for separately transferring data from the display data processing section A 140 to the display section 110, and a data transfer path 170 for separately transferring data from the display data processing section B 133 to the display section 110, wherein images of the display data generated by the display data processing section A 140 and the display data processing section B 133 of the display section 110 are selectively displayed in the display area of the display section 110 based on the selec

Abstract: A driving circuit of a display to display full color by light emitting elements is provided which can attain sufficient display characteristics even when there is a difference in characteristics of the light emitting elements and can lower power consumption. The driving circuit is used for a stripe type display in which electrical characteristics of a red light emitting organic EL (Electroluninescence) element differ greatly from those of green and blue light emitting organic EL elements in which these three light emitting elements are arranged repeatedly in a column direction in a manner that the red light emitting element is sandwiched by the green and blue light emitting elements and the driving circuit is made up of driving sections each having driving capability enough to drive the red light emitting organic EL element and other driving sections each having driving capability enough to drive the green and blue light organic EL elements.

Abstract: In conventional liquid crystal display controllers such as for portable telephone sets, the display is reduced in the stand-by state but the liquid crystal display duty is not changed, i.e., even the common electrodes of the rows that are not producing display are scanned, and the consumption of electric power is not decreased to a sufficient degree in the stand-by state. A liquid crystal display controller (2) includes a drive duty selection register (34) capable of being rewritten by a microprocessor (1), and a drive bias selection register (32). When the display is changed from the whole display on a liquid crystal display panel (3) to a partial display on part of the rows only, the preset values of the drive duty selection register and of the drive bias selection register are changed, so that the display is selectively produced on a portion of the liquid crystal display panel at a low voltage with a low-duty drive.

Abstract: A power saving circuit for a liquid crystal panel (LCD) and a plasma display panel (PDP) recovers an energy charged in a panel capacitor through one path of a drive IC driving a scan electrode or data electrode for the PDP, and recovers the energy charged in the panel capacitor through one path of a column drive IC or row drive IC for the LCD panel. The energy recovery path can be a parasitic diode or protective diode of the drive IC. The power saving circuit can operate in an addressing period.

Abstract: For enabling a liquid display drive with a low voltage and a high speed, each pixel is provided with a liquid crystal cell 5, a switching transistor 7 and an additional capacitance 9, and the additional capacitances are electrically commonly connected for a block of plural pixels. After the image signal is supplied to the pixels corresponding to the block, the potential of desired one of the common electrode lines 52, 52′, to which the additional capacitances 9 corresponding to the block are connected, is varied and retained at thus varied value.

Abstract: A photoelectric sensor 11 has a level display unit (28). The level display unit (28) is constituted by arranging a plurality of 7-segment indicators (33). The 7-segment indicators (33) are partially constituted of red LED segments (33b) and partially constituted of red/green two-color LED segments (33a). For a digital display, all of the segments are illuminated in red to display numerals. For a graph display, the red/green two-color LED segments are illuminated in green to present a bar graph.

Abstract: A method for enabling or disabling mode functions in a multimode electronic device is provided. The method comprises the steps of selecting a mode enabling/disabling mode from a plurality of modes by initiating activation of the mode selecting mechanism until the mode enabling/disabling mode is exhibited, causing the integrated circuit to enter the mode enabling/disabling mode, exhibiting at least mode function indicators for at least one of the exhibited mode functions within the plurality of modes as the mode selecting mechanism is cycling through the display of mode functions, and selecting the mode function for which enabling or disabling is desired and initiating the switching of the mode function from one of disabled to enabled if the mode function was disabled or one of enabled to disabled if the mode function was enabled. An electronic device that can carry out the foregoing methodology is also provided. In a preferred embodiment, the electronic device is a timepiece and specifically, a wristwatch.

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: A liquid crystal display of compact size is disclosed. The liquid crystal display has a tape carrier package and a single integrated PCB for processing a gate driving signal and data driving signal. The tape carrier package includes a base substrate, a gate driver IC formed on said base substrate, an input pattern formed on said base substrate that applies gate driving signals input from an external device to the gate driver IC, a first output pattern formed on said base substrate that outputs a first gate driving signal processed in said gate driver IC, and a second output pattern formed on said base substrate, that outputs a second gate driving signal bypassing the gate driver IC among the gate driving signals.

Abstract: A method of making a programmable shelf tag, including the steps of supplying a display element having a single flexible transparent; mounting the display element substrate side down in a window formed in a web of adhesive backed print medium having a die cut area around the display element to form an adhesive label that includes the display element; printing static information on the label of the print medium; supplying a support for mounting the adhesive; and attaching the adhesive label to the support.

Abstract: In conventional liquid crystal display controllers such as for portable telephone sets, the display is reduced in the stand-by state but the liquid crystal display duty is not changed, i.e., even the common electrodes of the rows that are not producing display are scanned, and the consumption of electric power is not decreased to a sufficient degree in the stand-by state. A liquid crystal display controller (2) includes a drive duty selection register (34) capable of being rewritten by a microprocessor (1), and a drive bias selection register (32). When the display is changed from the whole display on a liquid crystal display panel (3) to a partial display on part of the rows only, the preset values of the drive duty selection register and of the drive bias selection register are changed, so that the display is selectively produced on a portion of the liquid crystal display panel at a low voltage with a low-duty drive.

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 first sample-and-hold circuit samples and holds an input image signal so as to output an image signal to be applied to a data line causing noise. A correction circuit produces a correcting signal according to the image signal and a pre-charging voltage. An addition circuit adds up an image signal to be applied to a data line affected by the noise and the correcting signal so as to produce a corrected image signal. Consequently, when scanning lines are selected sequentially for each of blocks, into which a plurality of data lines is grouped, in order to display an image, irregular luminance occurring in portions of the displayed image coincident with the borders of the blocks is suppressed to be indiscernible.

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: In driver circuitry for driving an electro-optic display device having a row and column matrix array of pixels, including means for converting incoming digital display information signals into analog signals, sampling errors due to switch and column resistance and transmission delays are compensated by converting the digital samples for alternate columns (or rows) to analog signals having sampling errors of equal magnitude but opposite sign.

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 display driver has a system of driving a plurality of segments with 1/n duty binary voltages. In the system, one frame period has the following three sub-periods; the first sub-period, where the line sequential driving is performed, the second sub-period, where adjustment is made on the segment voltage dispersion which occurs depending on display patterns, and the third sub-period, which is at the other time span than the first and the second sub-periods in the same frame period, where the potentials of the common signals and those of the segment signals are identical. With this driving method, constant Von/Voff ratio is obtained, and the contrast dispersion and crosstalk, which occur depending on a display pattern, are mostly eliminated. Then a good display quality is obtainable, and also the effective values of the voltages applied to the liquid crystal, are adjustable irrespective to the power source voltage.

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.

Abstract: A structure of a liquid crystal device cutting down the power consumption is materialized. In a liquid crystal display device comprising at least two display portions of a dot matrix portion and an icon portion in the same panel, drive is carried out such that both of the display portions are displayed in a normal operation mode and, only the icon portion is displayed in a power-saving operation mode such as when the liquid crystal display device is waiting for operation or is standby. In the power-saving operation mode, the duty ratios of all of the display portions in the power-saving operation mode are lower than those in the normal operation mode, and time shared drive waveforms using the power source voltage as it is which does not require bias voltage are applied.

Abstract: A light modulating device, such as a ferroelectric liquid crystal display (FLCD) comprises an addressable matrix and modulating elements or pixels and associated circuitry for selectively addressing each element in a series of addressing frames in order to vary the transmission level of each element relative to the transmissions levels of the other elements. Such addressing utilises a temporal dither addressing scheme for addressing at least part of each element within each frame with different combinations of temporal dither signals applied to separately addressable temporal bits within the frame to produce different transmission levels. In order to enable a large number of grey levels to be produced whilst limiting the perceived errors at transitions between different grey levels, the temporal bits are addressed in a first order in a first frame (or in a first spatial location) and in a second order, which is different to the first order, in a second frame (or in a second spatial location).

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: A method of updating characters within a multiplexed display used for displaying events including dynamic events which occur at a relatively faster rate. The display characters representing dynamic events are refreshed at a higher refresh frequency and more frequently during each display cycle. A plurality of display drivers including at least one grid driver controls the update and enablement of characters within the multiplexed display.

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 single semiconductor chip device is utilized for controlling an external system which has a liquid crystal display (LCD) associated therewith. A dual port random access memory (RAM) stores data representative of information to be displayed on the LCD. The RAM includes a plurality of master data storage latches and a single slave data storage latch shared by all of the plurality of master storage latches. A microcontroller has a central processing unit (CPU) for communicating with the master storage latches via one of the RAM ports to periodically change the data stored therein. An LCD control module successively updates the data in the single slave storage latch with data from each of the master storage latches and downloads the updated data from the single slave storage latch to a temporary store associated with the LCD after each update from a master storage latch and before the update of data from the next master storage latch.

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: In a driving system of so-called enable chain system for dividing signal electrodes of a liquid crystal display device into a plurality of signal electrode groups and driving the respective signal electrode groups by drivers formed in an IC form, a data register in the driver includes a control circuit for creating an internal start signal for controlling the timing at which the display data fetching operation is started in synchronism with a clock signal.

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: A dot matrix LCD system able to provide a flashing effect having a control unit to output a signal indicative of a symbol to be displayed and a reversal signal indicative of whether the symbol is to be displayed in the reverse. A first memory unit connected to the control unit stores the symbol to be displayed, and a second memory unit connected to the control unit stores an indication of whether the symbol is to be displayed in the reverse. A character generator connected to the first memory unit generates a pattern of dots based on the indication stored in the first memory unit, while a pattern memory unit connected to the character generator stores the pattern of dots. An LCD display unit having a plurality of display dots, is driven by a driver to illuminate the display dots, corresponding to the pattern. A reversal operation unit connected between the pattern memory unit and the driver transmits the pattern from the pattern memory unit to the driver.

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: An IC for use in an IC apparatus for providing a timed drive of a display matrix, the display matrix displaying a multi-place text composed of at least one of letters, figures and other characters, and the display matrix having more columns than lines in order to display at least 1-line text. A plurality of identically structured ICs form a chain of such ICs that supply column signals for controlling the columns of the display matrix. Each IC has at least a shift register, a character generator and or read-only memory. The shift register into which bits are shifted which correspond to at least a section of text to be displayed on the display matrix has an input and an output operatively connected to an input pin and an output pin, respectively, of the IC.

Abstract: The invention relates to a circuit array for operating a liquid-crystal display in the time-division multiplexing mode, the display having at least one backplane and several segments. The circuit array includes a microprocessor having a first pulse generator, a shift register array storing data signals supplied to the circuit array, this shift register array having a number of stages corresponding to the number of segments, and driving stages which generate segment pulse sequences for the segments in accordance with the supplied data signals. In accordance with the invention, the microprocessor supplies the data signals to the shift register array via a first interface, the shift register array being designed as a cyclic shift register with each register point of the shift register array being clearly allocated to a segment. In addition, the microprocessor supplies control data, particularly data determining the time multiplexing rate, to a second interface having a decoder.