Abstract: A pixel including a light-emitting element, a driving transistor, a maintain capacitor, a switch device, and a control device. The driving transistor is serially coupled to the light-emitting element for driving the light-emitting element to emit light and has a threshold voltage and a gate connected to a point. A first terminal of the maintain capacitor is connected to the point. The switch device is controlled by a scan signal and connected between a data line and the point. The control device is connected to a second terminal of the maintain capacitor. When the switch device is turned off, the control device provides a first control voltage, the value of which is determined by the threshold voltage, to the point through the maintain capacitor.

Abstract: The preferred embodiments of the present invention provide a system and method for reducing the battery power required by a handheld device (300) that incorporates a graphical display (301). Graphical display (301), display drivers (307), LCD controller (403) and a memory (405) are optimized such that several pixels of information may be clocked simultaneously when the device is operating in a partial display mode. The optimized circuitry reduces the required refresh clock frequency (411) and thus the current drain on a device battery (319) thereby improving device operation time.

Abstract: A liquid crystal display device includes a liquid crystal display panel, a row electrode drive circuit (scanning signal line drive circuit), a column electrode drive circuit (source signal line drive circuit), a power supply circuit, a common electrode drive circuit, and a memory (storage means). The memory stores the respective optimum applied voltages for the source electrode corresponding to display modes of the liquid crystal display device, a reflective mode and a transmissive mode. With the above arrangement, in the case where the display mode is switched among a plurality of display modes, the above active matrix display device can reset an optimum applied voltage for a common electrode or a source electrode in accordance with each of the display modes to suppress the occurrence of flickers, thus allowing the display device to maintain a high quality of display all the time.

Abstract: A calibration method for calibrating a fixed format emissive display device having a plurality of pixels is described In the display each pixel comprises at least three sub-pixels for emitting light of different real primary colours. The method comprises determining, for each real primary colour separately, a virtual target primary colour which can be reached by at least 80% of the pixels of the display, determining a colour gamut defined by the determined virtual target primary colours, and adjusting the drive currents to the sub-pixels to achieve a colour inside the determined colour gamut. A display having an extended range of colours is described, i.e. a gamut of colours that is more than the gamut provided by an n virtual primary colour based electronic multicolour display, as measured on a chromaticity diagram, for example. A color and/or brightness uniform image can be produced with this fixed format emissive display device.

Abstract: An apparatus of driving a liquid crystal display (LCD) includes a gray voltage generator generating a range of gray voltages that correspond to different LC light transmittance levels. These gray voltages, along with image data, are fed into a data driver. The data driver converts the gray voltages to a data voltage that properly generates the image indicated by the image data. The gray voltage values are chosen from a wider range of values than the pixel voltages, and this conversion may include determining a conversion factor based on the relative range sizes. This conversion may also include calculating the voltage difference between the previous data and the current data and adjusting the data voltage according to the magnitude of this difference. Generally, the larger the voltage difference, the larger is the data voltage magnitude that is needed to bring the pixel voltage to the target voltage within limited time.

Abstract: A system for reducing the residual image effect of a liquid crystal display after turned off is described, which includes a timing controller, a source driver, a gate driver, and a plurality of thin film transistors on the panel of the liquid crystal display. The system first transmits an image signal to the panel of the liquid crystal display by means of the timing controller in a period of time from when a backlight of the liquid crystal display is turned off to when an image data transmission is turned off. The system then transmits a control signal to the gate driver through the timing controller to turn on all the thin film transistors during a period of time from when the image data transmission is turned off to when the power to the liquid crystal display is turned off. Therefore, residual electric charges in the thin film transistors are discharged rapidly via a plurality of source lines of the source driver, and the residual image effect is consequently diminished.

Abstract: A method of increasing image gray-scale response speed comprising the following steps: to divide plural driven gate lines of an LCD into plural areas; to divide the frame interval time relative to the plural areas into plural sub-intervals, and to sequentially activate each first gate line of these areas during a time period of synchronized signals, then to sequentially activate the next gate lines of these areas, the operation is repeated; to apply an advance voltage to at least a gate line to overdrive frames, and to apply an image data voltage to at least a gate line; to repeat the above steps until the end of the entire frame interval time and to enter the next frame interval. The LCD can be fast driven by dividing of time and space. The method suits for treatment of frames of displays of various LCD's and organic light emitting diodes (OLED's).

Abstract: A display apparatus (1) for generating a stereoscopic image by superimposing a plurality of images at a predetermined interval from each other on the view line of the viewer, the apparatus comprising: a first display unit (11) having a plurality of emission areas (11-1) for emitting a light, disposed in a discrete manner in a plane of a display screen and a plurality of transmission areas (11-2) for transmitting a light, disposed in a discrete manner in the plane of the display screen except for areas occupied by said plurality of emission areas; and a second display unit (12) disposed behind the first display unit as seen from the viewer.

Abstract: Regarding the time gradation method as the digital gradation expression method, it is an object of the invention to provide a display device which prevents a reduction of frame frequency and implements a low-power-consumption SRAM. The invention overcomes the aforementioned disadvantages of conventional technique by synchronizing a writing and reading by utilizing read and write signals of which states read at a certain timing to select which of two memories is efficient to be written.

Abstract: An image display device controls the video signal and the lighting circuit according to the input video signal, so as to improve contrast, so that flicker or “bright black display”, which may be caused when the display characteristics do not match the human visual characteristics, is eliminated. The image display device includes a filter circuitry, in which a filter selecting circuit changes the filter characteristic according to the difference of a video signal and memory data stored in a memory circuit. The filter circuitry selects different filter characteristics for the display change from dark to bright and for the display change from bright to dark. This prevents display flicker, which may be caused due to saturation of human visual perception with respect to changes in gradation and illuminance level.

Abstract: An electro-optical apparatus is provided which corrects a voltage applied to a pixel with high accuracy. An electro-optical apparatus includes a correction circuit. When, for example, a positive-polarity selection voltage +VS is applied to a scanning line during the second-half period of one horizontal scanning period, the correction circuit detects a spike resulting from voltage switching from a voltage ?VD/2 to a voltage +VD/2 on the data lines, determines whether the level of the detected spike is a threshold level or more, and if a determination is made that the level of the detected spike is the threshold level or more, adds a pulse with the same polarity as that of the detected spike to a selection-voltage supply line in the second-half period following the first-half period.

Abstract: A display driver includes a front drawing row designation register, a partial mode setting register, a data line driver circuit having an operational amplifier section and a partial non-display voltage output section, and a partial display control section. The front drawing row designation register is a register for designating one of the scanning lines corresponding to a front drawing row. The partial mode setting register is a register which sets for the scanning lines either a normal display mode in which a drive voltage depending on gray-scale data is supplied to at least one of the data lines, or a partial non-display mode in which a partial non-display voltage is supplied to at least one of the data lines. The operational amplifier section drives at least one of the data lines based on the drive voltage. The partial non-display voltage output section drives at least one of the data lines based on the partial non-display voltage. The partial display control section controls the data line driver circuit.

Abstract: A gradation potential generating circuit in a color liquid crystal display device includes 65 resistance elements connected in series and dividing a voltage applied between first and second nodes to generate 64 gradation potentials; a first current amplifier circuit provided corresponding to each gradation potential higher than a precharge potential of a data line and having charging capability higher than discharging capability; and a second current amplifier circuit provided corresponding to each gradation potential lower than the precharge potential and having discharging capability higher than charging capability.

Abstract: For a display device having a solar cell and a power buffer for keeping stored electric power, a display system which has a low-power drive mode, self-contained power and no need for recharging or power wiring is provided. The display system includes a solar cell using a thin-film semiconductor, a power storage element for temporarily storing the produced power, a driving circuit, a matrix display unit, a display rewrite instruction unit for inputting screen rewrite and a control circuit and starts rewriting a display when power sufficient to rewrite an image screen is stored in the solar cell. The display device having remarkable portability and no limited battery life, which controls a display mode depending on the power produced by the solar cell, can display even when power generation is low and allows self-contained power even if the storage element has a small capacity, can be obtained.

Abstract: Methods and apparatus for mitigating or substantially eliminating pixel burn-in on phosphor-based display panels. A visual display includes a display installation and a computer. The display installation may include a display panel having including a plurality of pixels each with a bit depth and an interface for receiving a video input and for driving the display panel. The computer is configured to determine a primary burn value for each of the pixels for a primary period of time, and to determine a secondary burn value for each of the pixels for a secondary period of time. The computer determines the secondary burn values such that when a pixel is driven at the secondary burn value thereof for the secondary period of time, an average value of the pixel for the primary and secondary periods of time is approximately equal to one-half of the bit depth of the pixel.

Abstract: A liquid crystal display apparatus capable of improving response time as well as display quality is provided. The apparatus includes a timing controller to generate a plurality of compensated grayscale data, a memory to store grayscale data or the compensated grayscale data, a column driver to apply the compensated grayscale data to a plurality of data lines, a gate driver to apply a gate signal to a plurality of gate lines, and a liquid crystal panel including the gate lines, the data lines and a plurality of switching element disposed between the data lines and the gate lines.

Abstract: A digitizer for user interaction via an object with an electronically refreshable display screen, the digitizer comprising: a transparent sensing arrangement of detectors located at said electronically refreshable display screen for detecting an electric field of said object, said detectors having outputs, and an arrangement of differential amplifiers associated with said outputs, thereby to apply differential detection between said outputs.

Abstract: In a personal data assistant, a main body includes an input sheet, which is turnable between a first position where at least a part of a display unit of the personal data assistant is covered and a second position where the display unit is not covered. The input sheet has various types of keys formed thereon. When any one of the keys is pressed on the input sheet, a pressure is applied to an input device formed on the display unit, and an input coordinate is detected by the change of, for example, the resistance value of the input device. Since the surface of the display unit is not entirely covered with the input sheet, the display in the range of the display unit which is not covered with the input sheet is not made dark. Further, since the input device is not directly touched with a finger, the input device is prevented from being made dirty, and the display of the display unit under the input device is prevented from being difficult to be seen.

Abstract: An active-matrix liquid crystal display device has pixels arranged in a matrix which each include a thin film transistor (TFT) as an active element. When the device is in a power-off state, TFTs in all the pixels are switched on, and all horizontal switches are turned on so that all data lines are supplied with a potential equal to the potential of common electrodes of the pixels. This forms a discharging path for discharging residual charge in all the pixels, and the discharging path can instantaneously discharge the residual charges.

Abstract: A cathode ray tube (CRT) device increases image resolution using spatial or temporal techniques. The CRT device includes a plurality of electron guns that each produce an electron beam and a plurality of separate phosphor dots, each corresponding to one of a plurality of primary colors. Certain ones of the phosphor dots form a color spot of a single primary color when impacted by an electron beam. The CRT device also includes steering electronics coupled to the plurality of electron guns to guide the electron beams to project on the phosphor dots to form a plurality of color spots each indicating a different one of the primary colors. The steering electronics direct the electron beams to separate and shift the color spots indicating the different primary colors from one another. In one embodiment, a subpixel clock is coupled to the steering electronics to effect subpixel rendering on the CRT device.