Abstract: A display device includes a pixel array in which a plurality of display pixels are arranged in a two-dimensional manner which is divided into a plurality of column groups composed of the display pixels of a predetermined number of columns, a signal drive circuit which produces a signal current based on display data, and sequentially outputs, in time series via a common terminals, the signal current that corresponds to the display pixels for one row of the pixel array for each of signal currents that correspond to each of the column groups, and a current latch circuit which sequentially captures and holds the signal currents output from the signal drive circuit for one row of the pixel array, generates gradation currents and simultaneously supplies the gradation currents to the plurality of data lines, wherein the pixel array and the current latch circuit are formed on a display panel substrate.

Abstract: A drive circuit that is an example of the present invention is a drive circuit of a display device for outputting in parallel the analog picture signals generated based on the digital picture signals inputted in serial. This circuit comprises a level shift circuit for converting the voltage level of the digital picture signals that were inputted in serial, a D/A conversion circuit for generating analog picture signals based on the digital picture signals that were subjected to level conversion with the level shift circuit, and an expansion circuit connected to the output side of the D/A conversion circuit or between the level shift circuit and the D/A conversion circuit and serving to expand and hold the inputted serial picture signals in parallel and output the picture signals in parallel. The level shift circuit is thus formed in the front stage of the picture signal register circuit.

Abstract: A display device includes a liquid crystal display panel having a first and second substrates with scanning electrodes and data electrodes and a liquid crystal layer; a scanning electrode driving circuit applying to the scanning electrodes scan pulse; a data electrode driving circuit applying to the data electrodes data pulses having combinations of different voltage levels according to write data; and a driving control circuit supplying to the scanning and data electrode driving circuits a pulse control signal controlling the phase of the scan pulses and data pulses. The scanning and data electrode driving circuits control the scan pulses and data pulses at voltage levels according to the pulse control signal, and the driving control circuit inverts or does not invert the phase of the pulse control signal, at each application interval of the scan pulses, according to the number of changed values and unchanged values of the write data.

Abstract: A power supply circuit including a high-potential-side voltage generation circuit and a low-potential-side voltage generation circuit which respectively generate a high-potential-side voltage and a low-potential-side voltage to be supplied to a common electrode, and alternately supplying the high-potential-side voltage and the low-potential-side voltage to the common electrode as a common electrode voltage so that polarity of the common electrode voltage is the same in consecutive first and second horizontal scan periods. When a precharge voltage of data lines in a precharge period in the first horizontal scan period is higher than the average voltage of the data lines set after the precharge period, the power supply circuit controls the supply capability of the common electrode voltage in a precharge period of the data lines in the second horizontal scan period.

Abstract: The present invention relates to device for driving liquid crystal display (LCD) and method for driving the same. The device for driving LCD comprises a voltage input module for receiving Gamma reference voltage; a voltage generation module connected to said voltage input module, for generating pixel driving voltage of a corresponding color with one resistor-chain, according to the Gamma reference voltage and the color of pixel being driven; and a voltage output module connected to said voltage generation module, for transmitting the pixel driving voltage of said corresponding color to a liquid crystal panel.

Abstract: An optimum driving method is realized in a miniaturized liquid crystal display device having two liquid crystal display panels so as to low power consumption. The liquid crystal display device includes a first liquid crystal display panel, a second liquid crystal display panel, a drive circuit which is mounted on the first liquid crystal display panel, output terminals which are formed on the first liquid crystal display panel and to which signals outputted from the drive circuit are supplied, and connection lines which connect the output terminals and the second liquid crystal display panel, wherein the drive circuit can change the AC driving method employed during a display period of the first liquid crystal display panel and the AC driving method employed during a display period of the second liquid crystal display panel which are present within the same frame.

Abstract: A display panel driving apparatus which reduces a peak value of a voltage/current upon charging or discharging of discharging cells on a display panel. The apparatus has a pulse generating part for supplying a driving pulse to a capacitive light-emitting device arranged in each of crossing positions of a plurality of row electrode pairs and column electrodes on the display panel of the display panel driving apparatus. The pulse generating circuit includes a charge/discharge resonance circuit for executing charging and discharging to the capacitive light-emitting devices through an inductor, and a harmonic multiplexing circuit for multiplexing a harmonic current having a harmonic frequency of a resonance frequency of the charge/discharge resonance circuit to a charge/discharge current by the charge/discharge resonance circuit.

Abstract: A predetermined voltage is supplied to a voltage supply line connected in common to respective current paths of driving elements of each of a plurality of display pixels. Adjustment voltages based on a predetermined unit voltage are sequentially applied to a plurality of data lines connected to the display pixels. Specific values corresponding to element characteristics of the respective driving elements of the display pixels are sequentially detected based on a value of a detection value that is a potential difference between a data line and the voltage supply line or a value of a current flowing into the voltage supply line. Correction gradation voltages are generated for each pixel by correcting a gradation voltage having a voltage value corresponding to display data for the pixel based on the specific value for the pixel, so as to compensate for characteristic fluctuation of the driving element of the pixel.

Abstract: A variable capacitor is formed from a pair of electrodes and a dielectric interposed between the electrodes over a substrate, and an external input is detected by changing capacitance of the variable capacitor by a physical or electrical force. Specifically, a variable capacitor and a sense amplifier are provided over the same substrate, and the sense amplifier reads the change of capacitance of the variable capacitor and transmits a signal in accordance with the input to a control circuit.

Abstract: Instant invention is related to a method to display gray shades in RMS responding display matrix, comprising acts of: selecting each row of the display matrix with a set of “s” discrete select voltages in a sequence or random and applying a set of discrete data voltages to a column of the display matrix wherein the data voltages are of both polarities and energy of the select and data waveforms that are applied to rows and columns are constants during the “s” time intervals for all the rows and columns to display gray shades in RMS responding display matrix.

Abstract: A LCD (Liquid Crystal Display) with improved motion image quality and a driving method therefor. The LCD includes a pixel, a data driving circuit and a scan driving circuit. The data driving circuit generates over driving pixel data and gray pixel data according to pixel data of a Nth frame and pixel data of a (N+1)th frame, and outputs driving voltages, which correspond to the over driving pixel data, black pixel data and the gray pixel data, to the pixel at first, second and third time. The scan driving circuit outputs a scan signal at the first time, second time and third time to enable the pixel to receive the driving voltages corresponding to the over driving pixel data, the black pixel data and the gray pixel data. The driving voltages enables the pixel to generate a brightness curve similar to a pulse curve.

Abstract: Disclosed herein are a liquid crystal display device which is capable of driving a liquid crystal using image signals supplied to two adjacent data lines, and a driving method thereof. The liquid crystal display device has a plurality of liquid crystal cells formed respectively in pixel areas defined by intersections of n gate lines and m data lines. Each of the liquid crystal cells includes a thin film transistor connected to any one of the gate lines and any one of two data lines adjacent respectively to left and right sides of a corresponding one of the liquid crystal cells, among the data lines, and a liquid crystal capacitor and a storage capacitor each formed between the other one of the two adjacent data lines and the thin film transistor.

Abstract: There are provided a liquid crystal drive method, a liquid crystal display system and a liquid crystal drive control device, which can realize low power consumption at an alternating current drive of a liquid crystal panel. A common voltage given to a common electrode of a liquid crystal is switched between a positive phase and a negative phase. Display data is converted in such a manner that first display data and second display data selecting two of a plurality of gradation voltages in which magnitudes of potential differences in the pixel electrodes in the positive phase and the negative phase with reference to the common voltage corresponding to display data in a display memory are the same are in the same bit pattern except for one specified bit. For example, bit allocation of positive and negative gradation display data is made in such a manner that low-order bits other than the highest order bit are symmetric up and down in binary with respect to the middle.

Abstract: The invention provides a method of driving an electro-optical device and an electronic apparatus which are capable of reducing the time for writing data without providing special circuits. In the electro-optical device pixel circuits having reset transistors for controlling an electric connection between drains and gates of driving transistors between the drains and the gates of the driving transistors are arranged on a display panel in a matrix. The pixel circuits arranged in a matrix are electrically connected to a scanning line driving circuit via scanning lines. The scanning line driving circuit sequentially switches on the reset transistors from the pixel circuit connected to first scanning lines in accordance with scanning line control signals supplied from a control circuit and then lets organic EL elements emit light.

Abstract: In a lamp driving apparatus, backlight assembly and liquid crystal display device using the same, the lamp driving module is mounted on the substrate and provides lamps with power voltage. Sensors are disposed on the substrate to face the lamps, and detect operation state of the lamps to output sensing signals. Voltage cut-off module is disposed on the substrate and compares the sensing signals with a predetermined reference signal. The voltage cut-off module provides the lamp driving module with voltage cut-off signal when at least one of the sensing signals has an amplitude smaller than the reference signal. The deterioration of the lamps may be prevented, and the life expectancy of lamps except broken lamps may be increased.

Abstract: The present invention provides a pixel driving method for a liquid crystal display. The pixel includes a storage capacitor and a liquid crystal capacitor. The pixel driving method includes steps of: providing a common voltage signal to a liquid crystal capacitor, and providing a bias signal to a storage capacitor wherein the bias signal is synchronized with the common voltage signal and the amplitude of the bias signal is larger than that of the common voltage signal.

Abstract: A method of writing an image on a liquid crystal display of the type having a layer of cholesteric liquid crystal material disposed between a pair of unpatterned conductors and a light absorbing layer for forming an image wise thermal pattern in response to an image wise pattern of light, including applying a first voltage to the conductors; applying a second voltage different from the first voltage to the conductors after applying the first voltage, wherein the first and second voltages are non-zero; and exposing the liquid crystal display to the image wise pattern of light.

Abstract: A liquid crystal display is provided, which includes: groups of gate lines transmitting a gate-on voltage; data lines alternately transmitting normal data voltages and an impulsive data voltage; pixels arranged in a matrix and including switching elements that are connected to the gate lines and the data lines and turn on in response to the gate-on voltage to transmit the data voltages; gate driving circuits connected to respective groups of gate lines and sequentially applying the gate-on voltage to the gate lines; a data driver applying the data voltages to the data lines; a duty ratio selector outputting a duty ratio selection signal informing a selected duty ratio; and a signal controller controlling the gate driver and the data driver based on the duty ratio selection signal, wherein the signal controller determines a time for the application of the impulsive data voltage based on the duty ratio selection signal.

Abstract: A display driver adjustable for a gamma specification of a liquid display panel, including: a system interface receiving display data from an external; a memory storing the display data; a grayscale voltage generator generating a plurality of grayscale voltages; a gamma adjusting circuit adjusting the gamma specification; and an output circuit outputting the grayscale voltage in response to the display data from the memory to the liquid display panel, wherein the gamma adjusting circuit includes: a gradient adjustment register controlling variable resistors of a ladder resistor; an amplitude/reference adjustment register; and a micro adjustment register, wherein the gradient adjustment register, the amplitude/reference adjustment register and micro adjustment register, are independently set in accordance with red, green and blue, respectively.

Abstract: An active matrix type liquid crystal display device driving method for switching a partial display mode and a normal display mode. The respective data lines of the partial display area are scanned in a certain period defined as a frame period, “k” pieces (symbol “k” is integer larger than, or equal to 1) of the partial display areas are present within 1 screen, a common electrode potential is varied 2k times within 1 frame period; a common electrode potential in a partially scanning period for scanning the partial display area is made as a constant potential against a reference of a driving circuit for driving the data lines; and within at least two continued frames, a common electrode potential of a blank period other than the partially scanning period is made as a constant potential which is different from the constant potential in the partially scanning period.

Abstract: An alternating unipolar carrier waveform is used to drive a pi-cell modulator. The pi-cell is driven by the carrier, but the carrier never changes polarity within the time period that the cell is energized. However, each time the cell is energized, i.e., once per field, the polarity alternates. Further, a burst of pulses each separated by a short rest period is used on initial application of power to more quickly drive the pi-cell to its activated state.

Abstract: An array substrate (10) is provided with a pixel electrode (3) disposed in a region defined by two adjacent gate wirings (1) and two adjacent source wirings (2), a switching element (5) for switching a voltage applied to the pixel electrode (3) from the source wiring (2) based on a signal voltage supplied from the gate wiring (1), a common wiring (8) arranged between the two adjacent gate wirings (1) and a common electrode (4) being electrically connected to the common wiring (8) and generating an electric field between the pixel electrode (3) whereto a voltage is applied, wherein the pixel electrode (1) comprises a first pixel electrode (1a) and a second pixel electrode (2a), and the opposing electrode (2) comprises a first opposing electrode (1b) and a second opposing electrode (2b), wherein a first region generates an electric field between the first pixel electrode (1a) and the first opposing electrode (2a) whose light transmittance is lower than that of the first pixel electrode (1a) and a second region

Abstract: A display device which includes a plurality of adjacent gate lines and drain lines disposed in a display area of the display device, and a plurality of pixels disposed in the display area, each of the plurality of pixels having a switching element coupled to a corresponding one of the plurality of adjacent gate lines and a corresponding one of the plurality of drain lines. During one frame period, the plurality of adjacent gate lines are selected, and thereby video signals are written into the plurality of pixels via the plurality of drain lines, and thereafter during the one frame period, the plurality of adjacent gate lines are selected, and thereby signals corresponding to blanking data are written into the plurality of pixels.

Abstract: A D/A converter with reduced power consumption is offered by reducing an amount of electric charges that is charged and discharged as D/A conversion is performed. A terminal of each of four capacitors C1, C2, C3 and C4 is connected to a common node. The capacitors C1, C2, C3 and C4 have capacitances C, C, 2C and 4C, respectively. A selection circuit SEL is provided with selection transistors ST1, ST2, ST3, ST4, ST5 and ST6, and selects and outputs either a first reference electric potential V1 or a second electric potential V2 according to a value of each bit of the digital signals D0, D1 and D2. Each of transfer transistors TT1, TT2 and TT3 transfers each of outputs of the selection circuit SEL to another terminal of corresponding each of the capacitors C2, C3 and C4, respectively, in response to a start pulse STP.

Abstract: In a drive unit for use with a matrix type display, a buffer circuit of the power supply circuit of the drive unit has an high-voltage first output circuit and a low-voltage second output circuit for generating the same output voltage under a normal operating condition, wherein the high-voltage output circuit has enhanced capability of providing output current to bring up the output voltage and the low-voltage output circuit has enhanced capability of providing output current to bring down the output voltage. A voltage detected at a node connected to the output end of the buffer circuit is compared with a bias voltage. Based on the comparison, the outputs of the first and second output circuits are switched over from one to the other as it is supplied to the display.

Abstract: A drive control circuit sends out pulse signals of various pulse signals so as to control the light emission amount and luminance of LEDs by gradually increasing and decreasing the pulse width in predetermined cycles during predetermined periods based on parameters supplied from an LED drive controller that determine a first emission control processing period, a second emission control processing period, first to fourth slope periods and the like. The tone of an emitted color realized by a plurality of LEDs is controlled by synchronizing the periods of time of light emission control processings.

Abstract: A power supply circuit which generates driving voltages for an electro-optic device having a plurality of common electrodes and a plurality of segment electrodes with the use of multi-line driving in which four lines of common electrodes are simultaneously selected. The driving voltages are first through seventh driving voltages in which an i-th (2?i?5, and i is an integer) driving voltage is higher than an (i+1)th driving voltage.

Abstract: The present invention provides a display device which can achieve the high breakdown voltage proof property, the enhancement of reliability or the expansion of the designing/process tolerance of transistors by the improvement of a circuit. A display device includes a plurality of pixels and a drive circuit which drives the plurality of pixels.

Abstract: A liquid crystal display includes a liquid crystal display panel including a plurality of data lines, a plurality of gate lines crossing the plurality of data lines, and a plurality of liquid crystal cells defined as a first and second liquid crystal cell groups, a data driving circuit to supply a data voltage to the data lines in response to a polarity control signal, a gate driving circuit to supply a scanning pulse that swings between a gate high voltage and a gate low voltage to the gate lines, a first logic circuit to generate the polarity control signal differently for each frame period to maintain a polarity of the data voltage charged in the first liquid crystal cell group, and to invert one time a polarity of the data voltage charged in the second liquid crystal cell group for two frame periods, and a second logic circuit to control the gate driving circuit to decrease the gate high voltage of the scanning pulse to a modulated voltage between the gate high voltage and the gate low voltage for a prede

Abstract: Power consumption in liquid crystal displays is analyzed by including frequent polarity reversals and duty cycle control. A multi-step voltage profile is proposed to reduce the power consumption in multiplexed and non-multiplexed displays. The present invention relates to a method to optimize power consumption in Liquid Crystal Display, wherein said method comprises steps of: applying multi-step waveform for selecting pre-determined address lines, maintaining ratio of step-width (Ts) and pulse width (T) between 0.02 to 0.25, and making final step duration (Tf) greater than or equal to twice the step width (Ts) to optimize power supply of the Liquid Crystal Display and apply a correction voltage if the distortion is significant and modifying the step sizes to reduce the supply voltage of the driver.

Abstract: A display device is for carrying out display by supplying a data signal, that is supplied from a video signal line, to one of a plurality of pixel electrodes via a switching element, and by supplying a scanning signal for controlling ON/OFF state of the switching element to the switching element via a scanning signal line that is orthogonal to the video signal line and is connected to the switching element. When the scanning signal is outputted to the scanning signal line, the scanning signal has a falling waveform that first falls substantially vertically from an ON-level of the switching element in a direction of an OFF-level of the switching element, and then starts falling with a slope, and again falls substantially vertically before reaching the OFF-level of the switching element. As such, the writing of the data signal to the pixel electrode may be securely carried out even when the writing period for each scanning signal is reduced, thereby displaying a high-quality image.

Abstract: A liquid crystal display apparatus having a level conversion circuit in which a high speed operation can be attained and also a small transistor capacity can be obtained is provided. In the liquid crystal display apparatus, a signal circuit for driving pixel elements of a display unit and a scanning circuit are provided. The level conversion circuit is constituted of a first and a second transistors 111 and 112 in which a respective gate electrodes is connected to a first bias voltage power supply, and a third and a fourth transistors 121 and 122 in which a respective gate electrodes is connected to a second bias voltage power supply and a respective source electrodes is connected to a power supply.

Abstract: A liquid crystal display (LCD) controller includes a plurality of segment/key source control circuits connected with an LCD panel and a key matrix through a plurality of segment/key source terminals, to periodically output a signal for one frame which contains a display output period and a key source output period. The plurality of segment/key source control circuits output to the plurality of segment/key source terminals during the display output period, segment signals having display drive voltages indicating a maximum value, a minimum value, and intermediate values between the maximum value and the minimum value.

Abstract: A TFT panel includes (i) a plurality of signal electrodes, (ii) a plurality of scanning electrodes which cross the plurality of signal electrodes, (iii) an active element provided in a vicinity of each intersection at which one of the plurality of signal electrodes and one of the plurality of scanning electrodes cross and connected to the one of the plurality of signal electrodes and the one of the plurality of scanning electrodes, (iv) a pixel electrode driven by the active element, and (v) a counter electrode to which an AC signal is applied, and which faces the pixel electrode.

Abstract: A liquid crystal display device includes a first substrate and a second substrate which are arranged to face each other in an opposed manner by way of a liquid crystal, first electrodes which are formed in a pixel region of a liquid-crystal-side surface of a liquid crystal display part of the first substrate, and second electrodes which are formed in a pixel region of a liquid-crystal-side surface of a liquid crystal display part of the second substrate. The liquid crystal display device further includes an arrangement which, with respect to a voltage applied between the first electrodes and the second electrodes formed per one or a plurality of frames, sequentially applies the voltage which is equal to or less than 20% of the maximum voltage between the first and second electrodes of respective pixel regions.

Abstract: A digital-to-analog conversion circuit includes a gradation voltage generation circuit, a most-significant-bits decoder circuit, a least-significant-bits decoder circuit and a calculation circuit. The gradation voltage generation circuit generates multiple main voltages corresponding to most significant bits of the inputted data, and multiple sub voltages corresponding to least significant bits of the inputted data. The most-significant-bits decoder circuit selects one of the main voltages in accordance with the most significant bits, and the least-significant-bits decoder circuit selects one of the sub voltages in accordance with the least significant bits. The calculator circuit performs calculation processing by use of a first main voltage selected by the most-significant-bits decoder circuit, a first sub voltage selected by the least-significant-bits decoder circuit, and a reference voltage.

Abstract: A gradation voltage selection circuit has a plurality of gradation selection parts, a plurality of tournament circuits, and a decoder circuit. Each of the plurality of gradation selection parts includes two first switch circuits and a second switch circuit. The tournament circuit repeating operations of selecting one of two gradation selection voltages based on a logic of partial bits except for bits of the gradation selection signal used for selection operations of the first and second switch circuits, and the decoder circuit selecting one of the plurality of gradation voltages output from the tournament circuit based on a result of decoding bits except for bits of the gradation selection signal used for selection operations of the first switch circuit, second switch circuit and tournament circuit, and supplying the selected one to the output wiring line.

Abstract: A liquid crystal display panel comprises a liquid crystal layer disposed between a row electrode group and a column electrode group defining a plurality of pixels arranged in a matrix. Full screen display on the liquid crystal display panel is carried out using a multiple line addressing (MLA) drive method. Partial screen display on the liquid crystal display panel is carried out using a smart addressing (SA) drive method.

Abstract: A double waveform method for driving a transmission line at an initial voltage to a final voltage is provided. The method includes finding a first voltage, a first maintenance period for the first voltage, a second voltage and a second maintenance period for the second voltage according to the initial voltage and the final voltage. The first voltage is put on the transmission line for a period equal to the first maintenance period. Thereafter, the second voltage is put on the transmission line for a period equal to the second maintenance period. Finally, the final voltage is put on the transmission line. With this transmission arrangement, a stable and correct signal voltage is transmitted through a transmission line faster.

Abstract: A liquid crystal display is provided, which includes: a plurality of pixel row groups, each pixel row group including at least one pixel row that includes a plurality of pixels arranged in a matrix and including switching elements; a plurality of gate lines connected to the switching elements and transmitting a gate-on voltage for turning on the switching elements; and a plurality of data lines connected to the switching elements and transmitting data voltages, wherein the switching elements in adjacent pixel row groups are connected to the data lines at opposite sides.

Abstract: A driving circuit for a liquid crystal display device includes a reference voltage source, a first switch connected to the reference voltage source, a second switch connected to the first switch, a PUMP signal generator connected to the first and second switches, the PUMP signal generator oppositely adjusting the first and second switches, a capacitive element connected to the first and second switches, a third switch connected to the second switch, and a reset voltage source connected to the third switch.

Abstract: A liquid crystal includes a plurality of pixels, a plurality of gate lines, and a plurality of data lines. The plurality of pixels are arranged in a matrix format. The plurality of gate lines transmit a gate signal to the pixels. The plurality of data lines cross the gate lines and transmit data voltages respectively corresponding to the plurality of pixels a plural number of times. A voltage that is the same as that of the data lines neighboring the first and last data lines is applied to the first and last data lines among the plurality of data lines at least once.

Abstract: A display panel for driving a display panel in response to data and gate signals, includes first and second switching sections, a timing control section, a driving voltage generating section, a gate driving section and data driving section. The first switching section switches a source voltage in response to a first switching signal. The timing control section outputs a gate control signal and a data control signal in response to the source voltage. The driving voltage generating section receives the source voltage to output first, second and third driving voltages. The second switching section switches the first, second and third driving voltages. The gate driving section outputs the gate signals in response to the first and second driving voltages. The data driving section outputs the data signals in response to the third driving voltage. The display panel eliminates a noise generated when an electric power is off.

Abstract: A method and an apparatus for driving passive matrix liquid crystal, comprising the steps of: simultaneously selecting Y row electrodes, where Y is an odd number of 7 and above; calculating an exclusive OR between a Y-bit row selection vector representing a selection pattern of the Y row electrodes and Y-bit ON/OFF display data representing a display pattern of column electrodes, for each corresponding bit; adding the exclusive ORs for each bit; when X=(Y+1)/2, and a 1/(X?1) voltage of the maximum voltage of the column electrodes is Vc, selecting a voltage level of the column electrodes from X voltage levels satisfying: [2×i?(X?1)]×Vc (i=an integer of 0 to (X?1)) in accordance with the result of the addition for driving. These method and apparatus prevent the frame response phenomenon of high-speed liquid crystal while realizing high-contrast display, low-voltage driving, low power consumption, and reduction in chip size.

Abstract: A charge characteristic compensating circuit for a liquid crystal display panel for maintaining a charge characteristic of the liquid crystal display panel independently of ambient temperature change to prevent deterioration of images displayed. A plurality of liquid crystal cells control light transmission in response to data signals from the data lines. A plurality of thin film transistors switch the data signals from the data lines to the liquid crystal cells in response to signals on the gate lines. A voltage supply generates a gate voltage required for the gate lines. A gate line driver applies the gate voltage from the voltage supply to the gate lines to drive the gate lines. A gate line controller responds to a change in the ambient temperature to vary a controlling signal applied to the gate line driver.

Abstract: A power control system comprises a plurality of point-of-load (POL) regulators each adapted to convey regulated power to a load, a serial data bus operatively connecting the plurality of POL regulators, and a digital power manager connected to the data bus. The digital power manager includes a controller adapted to execute stored instructions to program operational parameters of the plurality of POL regulators via the serial data bus and receive monitoring data from the plurality of POL regulators via the serial data bus. The digital power manager further comprises a user interface, such as an I2C interface, adapted to receive programming data therefrom and send monitoring data thereto.

Abstract: This invention provides a color passive matrix bistable liquid crystal display system, in which one respective scan line corresponds to sub-pixels of same color and neighboring scan lines correspond to sub-pixels of different colors. The scan lines are grouped in accordance with the colors of the sub-pixels corresponding thereto such that different scan driving voltages can be provided to the sub-pixels of different colors when the scan lines are scanned. By way of the arrangement of the sub-pixels, different scan driving voltages are switched to the respective scan lines in accordance with the colors of the sub-pixels corresponding thereto. As a result, a demand that the sub-pixels of different colors require different scan driving voltages is satisfied. The image quality is improved.

Abstract: A super twisted nematic (STN) liquid crystal display (LCD) driver and a driving method thereof includes a sub frame counter that counts the number of sub frames in response to a clock signal and generates a sub frame flag signal when each sub frame is counted. An N clock counter receives an N-line signal and generates an N-line flag signal when the number of N-line counted is N in response to the clock signal. A frame counter receives a frame rate control (FRC) selection signal, counts the number of the sub frame flag signal, and generates a frame flag signal when the number of the sub frame flag signal counted is n. A liquid crystal polarity inversion signal generator receives one of the sub frame flag signal, the N-line flag signal, and the frame flag signal in response to a selection signal, and generates a liquid crystal polarity inversion signal.

Abstract: In a liquid crystal display device of the present invention, a source line is formed of a gate metal and a gate line is formed of a source metal for reduction of the number of masks, whereby deterioration of a liquid crystal on the gate line is prevented. During a period in which the liquid crystal display is not used, an inverse voltage for preventing deterioration of the liquid crystal is applied to it. In addition, when the gate line is scanned, a width of a start pulse inputted in a shift register for driving a gate line is increased to approximately ten times as large as an ordinary width to improve a duty ratio in an inverted period of the gate line.

Abstract: A driving voltage control device includes a first to fourth capacitor, and an output section. In the first mode, the first capacitor receives a first voltage and stores a corresponding amount of charge, the second capacitor receives a second voltage and stores a corresponding amount of charge, and the output section supplies either one of a voltage according to the amount of charge stored in the first capacitor or second capacitor to a first output node according to a predetermined timing. In the second mode, the third capacitor receives a third voltage and stores a corresponding amount of charge, the fourth capacitor receives a fourth voltage and stores a corresponding amount of charge, and the output section supplies either one of a voltage according to the amount of charge stored in the third capacitor or fourth capacitor to a second output node according to a predetermined timing.