191results about How to "Reduce afterimage" patented technology

An organic light-emitting diode display device includes a first switch element turned-on in response to a first scanning signal during a first period to supply a data to a first node, and then maintaining an off-state during a second period, a driving device adjusting a current through an organic light-emitting diode element in accordance with a voltage of the first node; a reference voltage source providing a reference voltage that is capable of turning-off the driving device, a second switch element maintaining an off-state during the first period, and turned-on during the second period to supply the reference voltage to the first node, and a storage capacitor maintaining the voltage at the first node.

A sensor device includes sensor elements two-dimensionally arranged and a sensor driving section driving the sensor elements. Each of the sensor elements includes a photoelectric conversion element generating electric charge according to an amount of received light, a charge storage section connected to one end of the photoelectric conversion element and storing electric charge generated by the photoelectric conversion element, a readout section reading either a voltage value resulted from the electric charge in the charge storage section or the stored electric charge, to output the read voltage value or the read electric charge and a reset section resetting the electric charge in the charge storage section through supplying a predetermined reset voltage to the charge storage section. The sensor driving section controls the reset section so that the predetermined reset voltage is continuously or intermittently supplied to the charge storage section over a period exceeding one horizontal scan period.

The invention discloses a device for controlling the displaying time of a static picture and an implementation method thereof. The device comprises a video stream input module, a data extraction module, a frame buffering module, a frame latching module, a comparison module, a control operation module, a pixel processing module and a video stream output module, and the device further comprises a communication module. The invention further discloses an implementation method for the device, which comprises the following steps: initializing the modules; carrying out the frame latching operation on a data-displaying frame; and judging whether the displaying data of the frame buffering module and the frame latching module are consistent, if so, judging whether the displaying time of the static picture exceeds the predetermined threshold, and carrying out the frame-inserting operation or pixel-shifting operation, and if not, re-latching the data frame. By accurately measuring the displaying time of the static picture and carrying out the corresponding avoiding operations, the invention can prevent a plasma display panel from displaying static pictures and high-brightness pictures for a long time, prolongs the service life of the plasma display panel, effectively reduces the remnant shade problems of the plasma display panel and greatly reduces the workload of development.

The invention provides a liquid crystal display. In the liquid crystal display, a first alignment layer formed on a first substrate includes a first region aligned in a first direction and a second region aligned in a second direction opposite to the first direction, and a second alignment layer formed on a second substrate facing the first substrate includes a third region aligned in a third direction different from the first direction and a fourth region aligned in a fourth direction opposite to the third direction. The liquid crystal molecules interposed between the first and second alignment layers are aligned in different directions in different domains defined by the first to fourth regions. A pixel electrode includes an extension part extending in at least one of the first to fourth directions. The aperture ratio and the light transmittance of the liquid crystal display are improved.

The present application relates to a liquid crystal display including a first substrate, a plurality of gate lines, a plurality of data lines, thin film transistors connected to the gate and data lines, a barrier rib formed on the data lines, and pixel electrodes connected to the thin film transistors. The thin film transistors can be formed using a colored organic film that has an optical density in a range of 1 to 3. Color filters fill the regions surrounded by the barrier rib. Pixel electrodes can be formed on the color filters. A common electrode can be formed on the second substrate facing the first substrate. A liquid crystal layer can be situated between the first and second substrates, which are spaced apart at a predetermined distance by spacers.

The invention provides a television anti-ghost processing method, a television and a storage medium, and the method comprises the steps: detecting whether a display image on an OLED screen changes ina first preset time or not if an OLED screen of a television is in a lightened state; and if not, judging a display picture on the OLED screen as a static picture, and controlling the OLED screen to reduce the brightness according to a preset rule. According to the invention, the brightness of the OLED screen in a static picture is properly reduced; the pixel points on the OLED screen are not in ahigh-brightness state for a long time, the probability of ghost shadows is reduced, the fault rate of the ghost shadows of the OLED screen can be effectively reduced, and the service life of the OLEDscreen is prolonged while it is guaranteed that a user normally uses the OLED screen.

Provided are a phosphor paste composition, a flat display device including the same, and a method of manufacturing the flat display device. The phosphor paste composition contains a phosphor with at least a heat-resistant material selected from a Group II atom-containing material, a Group III atom-containing material, and a Group IV atom-containing material, a binder, and an organic solvent. By using the phosphor paste composition, the deterioration of the phosphor can be prevented during a heat treating process. The flat display device includes a phosphor layer containing the phosphor coated with the heat-resistant material such that lifetime of the flat display device is increased and a permanent residual image phenomenon, the adsorption of water by the phosphor, and the like can be prevented.

The present invention relates to a liquid crystal display (LCD) device which is capable of improving picture quality by switching an optimal gamma voltage and an optimal common voltage on a basis of an operation time, and a method for driving the same. The liquid crystal display device includes a timing controller, a voltage generating unit, a data driver, and a liquid crystal panel. The timing controller can generate voltage control signal for switching initial state to stable state by using certain switching point. The voltage generating unit can receive the voltage control signal, supply the first gamma voltage and the first common voltage during the initial state, and supply the second gamma voltage and the second common voltage during the stable state. The data driver can receive the first gamma voltage in the initial state and the second gamma voltage in the stable state. The liquid crystal panel can suppress short-term residual image if the first gamma voltage and the first common voltage are supplied, and can suppress long-term residual image if the second gamma voltage and the second common voltage are supplied.

Provided is a liquid crystal display device that includes a liquid crystal layer sandwiched between two substrates, one of which includes a pixel electrode and a common electrode, where the electrode that is disposed closer to the liquid crystal layer has a stripe pattern that includes a plurality of slip electrode portions, and each of the plurality of slip electrode portions includes a curved portion at which each of the plurality of the slip electrode portions changes a stretching direction, and where the other electrode has a solid flat shape provided with a plurality of openings at locations that overlap with the curved portions of the plurality of slip electrode portions, the plurality of openings being provided in a manner that makes the opening in one curved portion independent and that allows only a convex outline segment of the slip electrode portion to run through an area of the opening.

In driving a liquid crystal display device, respective voltages of picture signals supplied in subframe periods are changed so as to enlarge a voltage difference between a gradation voltage of a picture signal supplied in the first subframe period and a gradation voltage of a picture signal supplied in the second subframe period.

The invention provides a three-dimensional display device and a display control method thereof. A plurality of back light units are controlled to be simultaneously opened when the back light units receive a drive signal of a frame in a display area which is on the lowest side and a liquid crystal in the display area on the lowest side completely reacts, and each of the back light units is closed when each of the back light units starts to receive a drive signal of another frame in a corresponding display area. The brightness of each display area is controlled through a drive current of each of the back light units which the display areas correspond to. By means of the three-dimensional display device and the display control method thereof, picturecrosstalk generated by the three-dimensional display device can be reduced, ghost shadows are reduced, the three-dimensional display effect is improved, and the experiencing effect of a user is promoted.

A method of driving a display panel includes generating a high pixel gamma voltage and a low pixel gamma voltage. At least one of the high pixel gamma voltage and the low pixel gamma voltage includes a positive gamma voltage and a negative gamma voltage having different values. The positive gamma voltage is a difference between a first gamma voltage higher than a common voltage and the common voltage. The negative gamma voltage is a difference between the common voltage and a second gamma voltage lower than the common voltage. A high pixel data voltage is generated based on the high pixel gamma voltage and the high pixel data voltage output to a high pixel. A low pixel data voltage is generated based on the low pixel gamma voltage and the low pixel data voltage is output to a low pixel.

[Problem]In the present invention, it is an object to improve display quality by improving response speed of a liquid crystal element in a liquid crystal display device, in particular, response speed in the case of falling. [Means for Solving the Problems]In the present invention, it is characterized that a liquid crystal layer is divided into plural regions (domains) substantially by mixing a chemical compound including a liquid crystal skeleton in a liquid crystal layer exisiting liquid crystal molecules as a technique to improve response speed of a liquid crystal element in a liquid crystal display device for solving the above problem.

A driving method of a display device comprising a display area including a plurality of pixels arranged in a matrix, comprising a first step and a second step. In the first step, a first signal is input to each of the plurality of pixels and a first image is displayed on the display area. In the second step, a second signal is input to each of the plurality of pixels; an afterimage that appears on the display area in the first step is erased; a second image is displayed on the display area. The second step is performed after the first step.

The invention provides a method and system reducing ghost shadows of an electronic ink screen. In a Partial mode, when refreshment is carried out between two same gray scales, one or more frames of the gray scales are added, a refreshing mode that a grey scale is compensated in the process of a grey scale to the grey scale is achieved, the effect of VCOM voltage of the electric ink screen is resisted, the electric ink screen is prevented from darkening, the ghost shadows are reduced, the display speed is not influenced, and thus the display effect is greatly improved.

The invention provides a method for manufacturing liquid crystal display panels, comprising the following steps: providing a first substrate, a second substrate and a liquid crystal layer, wherein, the liquid crystal layer comprises a liquid crystal component, a photosensitive molecule monomer and a photoinitiator; the liquid crystal display panel is provided with a plurality of pixels, and each pixel comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel, then the liquid crystal display panel controls liquid crystal component to lead a plurality of liquid crystal molecules corresponding to the red sub-pixel in the liquid crystal component to be arranged along a first pretilt angle theta R, a plurality of liquid crystal molecules corresponding to the green sub-pixel to be arranged along a second pretilt angle theta G, and a plurality of liquid crystal molecules corresponding to the blue sub-pixel to be arranged along a third pretilt theta B, and the theta G is more than or equal to the theta B and is less than or equal to theta R, and polymerizes the photosensitive molecule monomer to form a stable alignment layer of a polymer between the liquid crystal layer and the first substrate and between the liquid crystal layer and the second substrate.

Apparatus and method for correcting a tone of a panoramic image. An image processing apparatus may acquire, from an overlapping region of a left image and a right image, ghost information based on an optimal threshold and a cost map in which a similarity between the left image and the right image is reflected, may generate a tone correction map based on a global tone correction function generated using the ghost information in the overlapping region, and based on a local tone correction level generated using local information of an optimal seam, and may correct the left image and the right image using a final tone correction map generated by applying, to the tone correction map, a weighting based on the left image and a weighting based on the right image.