69results about How to "Reduce image retention" patented technology

A liquid crystal display panel including a first substrate, a second substrate, a liquid crystal layer, and a polymer stabilized alignment layer is provided. The second substrate is disposed opposite to the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The polymer stabilized alignment layer is disposed between the first substrate and the liquid crystal layer, and an average surface roughness of the polymer stabilized alignment layer is greater than or equal to 10 nm.

The invention relates to a method for processing an image, adapted for a display comprising a plurality of pixels, comprising the steps of setting, in dependence upon the image content, a portion out of the plurality of pixels to black for obtaining off-pixels thereby reducing the resolution of the display to a predefined value; and sequentially switching the position of the off-pixels over the plurality of pixels comprised by the display. In this way, a possibility for reducing or compensating for image retention in displays is provided.

The invention discloses a reference voltage compensating device and method. The method comprises the following steps: 1, inquiring a reference voltage compensating value corresponding to the current compensating region from a look-up table, wherein the look-up table contains preset reference voltage compensating values corresponding to all the compensating regions; 2, carrying out digital-analog conversion on the inquired reference voltage compensating value to form an analog voltage signal; and 3, stacking a reference voltage signal and the analog voltage signal to form a new reference voltage signal, and outputting the new reference voltage signal to a source electrode driver. Because the source electrode driver uses the formed new reference voltage signal in the technical scheme, the problems of image retention and poor image quality of displayed pictures caused by the uneven distribution of common electrode voltage on a liquid crystal panel can be effectively solved, thereby reducing the image retention of displayed pictures and improving the image quality of the displayed pictures.

Assembly of sensors formed as an imager with a detection brick including a photosensitive material, a brick for addressing and optionally processing signals from the sensor(s), an interconnection brick located between the detection brick and the addressing brick, this brick including connection pads, characterized in that the photosensitive material of the detection brick contains polymorphous silicon. The invention also relates to a method for the making of the latter.

An image display device having improved properties, comprising an image display panel, heat dispersion material positioned proximate to the image display panel, an open frame positioned proximate to the heat dispersion material opposite the image display panel, and a plurality of electronic components engaging the open frame, the image display device exhibits a support factor of less than about 375 mm-W/m° K.

The invention discloses a backlight control method and apparatus, and a liquid crystal display apparatus. The main content of the method comprises the following steps: from the time when it is monitored that a first row of pixels in an N-th row image subarea of a current image frame starts driving scanning, switching off a backlight lamp of a backlight subarea for a time length of t, wherein t is scanning black frame insertion time; after the backlight lamp of the backlight subarea is switched off for the time length of t, switching on the backlight lamp of the backlight subarea for a preset time length, and enabling backlight brightness of the current backlight subarea to satisfy needed brightness; and after the backlight lamp of the backlight subarea is switched on for the preset time length, setting the backlight lamp of the backlight subarea to be closed. In such a way, a tailing phenomenon generated due to a visual persistence effect is effectively improved, at the same time, it is ensured that the backlight brightness of each backlight subarea is the same, the brightness uniformity of the backlight subarea is improved, and the display quality of a liquid crystal display apparatus is effectively improved.

A display apparatus for communicating with a computer main body through a DPVL system, wherein the display apparatus is provided with a video signal processor to process a video signal output from a computer main body into a displayable video signal, a frame buffer to store frame information corresponding to the video signal, and a controller to control the video signal processor to display a picture based on the frame information stored in the frame buffer when a predetermined shutdown signal is output from the computer main body, and change the picture on the basis of the stored frame information when a predetermined period has elapsed after receiving the shutdown signal. Thus, the present invention provides a display apparatus in which an image sticking phenomenon is decreased, wasteful power consumption is reduced, and which can prevent a user from being confused while the display apparatus continuously displays a still picture.

The method to reduce image sticking in a plasma display panel (PDP) includes four steps. There is converting a relationship between gray level and brightness of an input signal into a linear relation by a converter. Next, there is recording an image with a static image detector at time t using a frame buffer, and after a period of time Δt, comparing the image at time t with the image at time t+Δt, thereby identifying static or dynamic images in the pixel. Then, there is recording a gain of every pixel by a brightness regulator using an image gains memory buffer zone, the gain being regulated according to detection results of the static image detector. Finally, there is improving gray level performance of output images by a gray level promoter and brightness converter. Thus, method actively detects static pixels and reduces brightness in the static region for minimized image sticking.

A method for driving a normal black type liquid crystal display (LCD) includes driving the LCD by applying uncompensated source signals corresponding to gray levels; recording first optimized common signal voltages (Vcom-opt1) of common signals corresponding with the gray levels; adjusting the source signal to drive the LCD so second optimized common signal voltages (Vcom-opt2) of common signals corresponding with the gray levels conform to the following conditions: (1) when the gray level is lower than a predetermined gray level, the Vcom-opt2 exceeds a predetermined voltage of the common signal and the absolute difference between the Vcom-opt2 and the predetermined voltage is less than or equal to that between the Vcom-opt1 and the predetermined voltage; and (2) when the gray level exceeds the predetermined gray level, the absolute difference between the Vcom-opt2 and the predetermined voltage is less than or equal to that between the Vcom-opt1 and the predetermined voltage.

A liquid crystal display (LCD) panel and a fabricating method thereof are described. First, a first substrate and a second substrate are provided. A liquid crystal monomer layer is then formed on the surface of at least one of the first and second substrates. Next, a curing step is performed to the liquid crystal monomer layer to induce a polymerization reaction, so as to form a liquid crystal polymer layer. Thereafter, the first and second substrates are assembled and a liquid crystal layer is filled between the first and second substrates.

A liquid crystal composition is described, which has a negative dielectric anisotropy and contains a specific compound having high stability to ultraviolet light as a first component, and may further contain a specific compound having a large negative dielectric anisotropy as a second component, a specific compound having a high maximum temperature or a small viscosity as a third component, and a specific compound having a polymerizable group as an additive component. An AM liquid crystal display device is also described, including the liquid crystal composition.

The present invention directs to a method an device for avoiding image sticking, the method for avoiding image sticking is to adjust a real common electrode voltage by difference between the real common electrode voltage and an ideal common electrode voltage, said difference is obtained by acquiring a real pixel electrode voltage on a panel; the device comprises a difference generation block for generating the difference between the real common electrode and the ideal common electrode voltage and an adjusting block for adjusting the real common electrode voltage, said adjusting block comprises an enabling block for generating a common electrode voltage adjustor enabling signal, a control block for generating a common electrode voltage adjustor control signal, and a common electrode voltage adjustor for adjusting the real common electrode voltage. With the method and device of the present invention, the coupling voltage's influence on a pixel electrode can be eliminated, and image sticking can be alleviated or avoided, and no impact on flicker is generated.

An electro-optical device includes a plurality of scanning lines; a plurality of data lines; a plurality of pixels that are provided so as to correspond to intersections between the plurality of scanning lines and the plurality of data lines, each of the pixels has a pixel electrode, and a switching element that allows, when the selection voltage is applied to the scanning line, the data line and the pixel electrode to enter a conductive state; a scanning line driving circuit that supplies a selection voltage for selecting the plurality of scanning lines in a predetermined order; and a data line driving circuit that supplies, when the scanning line is selected, an image signal to the corresponding data line in accordance with a gray-scale level of the corresponding pixel. Further, an entire screen display mode in which an entire screen is displayed and a partial display mode in which a part of an entire screen is set to a display region and the other portion is set to a non-display region are selected, and the scanning line driving circuit supplies a first voltage to the scanning lines of the display region for a predetermined period in the entire screen display mode, and supplies a second voltage to the scanning lines of the display region for a period longer than the predetermined period in the partial display mode.

A light emitting diode circuitry includes a first transistor, a second transistor, a third transistor, a fourth transistor, a storage capacitor, a fifth transistor, a sixth transistor and light emitting diodes. The first transistor is used for receiving a first control signal. The second transistor is used for receiving a second control signal. The third transistor is electrically coupled to the second transistor and the first transistor. The fourth transistor is used for receiving a data signal and a third control signal. The storage capacitor is electrically coupled to the second transistor. The fifth transistor is used for receiving a fourth control signal. The sixth transistor is used for receiving a fifth control signal. The light emitting diodes are coupled to the sixth transistor and a power source.

To reduce the image sticking, a first number of frames outputted from the multimedia signal source are successively received. The first number of frames are processed to obtain a plurality of corresponding gray-level characteristic. A predefined frame is inserted into a plurality of incoming frame with a specified ratio if the plurality gray-level characteristic is qualified to a specified predefined condition.

A liquid crystal display includes a frame rate control (FRC) device which adds an FRC compensation value to digital video data using a plurality of FRC patterns defining subpixels, to which the FRC compensation value will be written, and a data driving circuit which converts the digital video data received from the FRC device into a data voltage and invert a polarity of the data voltage based on a previously determined inversion method. The FRC device counts frame periods and increases a frame count value each time the frame period changes. The FRC device changes to a next FRC pattern in previously determined order in response to the frame count value, and holds or skips the frame count value when the frame period reaches a previously determined time.

A driving method with reducing image sticking effect is disclosed. The driving method includes applying a voltage on the data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect, and applying different asymmetric waveforms to different data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect.

The present invention provides a liquid crystal display device that sufficiently reduces image sticking, by forming a polymer layer with stable alignment control appropriately. In a method for manufacturing the liquid crystal display device of the present invention, base film forming conditions are different between the step of forming a base film on a substrate including an active element and the step of forming a base film on a substrate different from the substrate including an active element.

The present invention relates to a photoalignment layer, for example, a liquid crystal alignment layer, which is able to realize the wide viewing angle and contrast ratio characteristics of a photopolymerizable alignment layer, and to facilitate interaction with the liquid crystal layer, thereby improving alignment stability and reducing image sticking, and a liquid crystal cell including the same. The liquid crystal alignment layer includes a photo-alignment layer including a photo-alignment polymer having at least partially photo-aligned photoreactive groups; and a mesogen layer including a cured product of a reactive mesogen that is liquid crystal-aligned by the photo-aligned photoreactive group, in which the photo-alignment polymer include a norbornene-based polymer having a particular structure.

An AMOLED back plate includes a substrate on which a buffer layer and a poly-silicon section are sequentially formed. A source and a drain are respectively formed of P-type heavy doped micro silicon on the poly-silicon section that have edges facing and spaced from each other to define a channel therebetween. A gate isolation layer is formed on the buffer layer, the source, the drain and the channel. A gate is formed on the gate isolation layer and has opposite edges that face in directions toward the edges of the source and the drain. The opposite edges of the gate are spaced from the edges of the source and the drain by predetermined spacing distance in horizontal directions so as to prevent the gate from overlapping the source and the drain.