56results about How to "Avoid image sticking" patented technology

The invention discloses a pixel circuit, a driving method of the pixel circuit and an organic electroluminescence display panel. A first node and a second node are reset in the initialization phase through a first switching transistor and a seventh switching transistor included in a node initialization module so that the difference caused by parasitic capacitance of the two nodes can be avoided. The gate electrode of a driving transistor is electrically connected with the first node. The source electrode of the driving transistor is electrically connected with the second node. The driving transistor is reset in the initialization phase so that the problem of threshold grabbing inconsistency caused by voltage jump can be avoided, and the brightness of the first frame after high and low grayscale switching is ensured to be consistent. Besides, the driving transistor is completely reset in the initialization phase of each frame so that the ghost phenomenon caused by deviation of the threshold voltage of the driving transistor can be prevented.

The present invention discloses a pixel circuit, a driving method thereof, a display panel and a display device. According to the present invention, before a light-emitting device emits light, an initialization module provides the signals at a reference signal end to the grid and the second pole of a driving transistor separately, provides a signal at a first voltage end to the first pole of the driving transistor, and is utilized to reset the grid and the first pole of the driving transistor separately, so that the difference caused by the parasitic capacitances of the grid and the first pole is avoided, and further the problem that due to the voltage jump, the threshold values are captured inconsistently, is avoided, and accordingly, the consistent brightness of a first frame after the high and low gray-scale switching can be guaranteed. Moreover, the second pole of the driving transistor is reset at the initialization stage of each frame, so that a large current flows through the driving transistor, and the threshold-voltage excursion of the driving transistor caused by the bias stress is forced to recover, and accordingly, a persistence of vision phenomenon is avoided.

A method of improving the afterimage phenomena for LCD is suitable for improving the afterimage phenomena produced after the LCD is shut off. The LCD consists of grid driver element, control circuit and pixel array, in which the said control circuit and grid driver element individually are coupled on the pixel array, moreover, when the LCD is shut on, the control circuit is shut off. The method activates the control circuit to get the control circuit to activate the pixel array to discharge when the LCD is shut off, then eliminates the charges remained in the pixel array to avoid the afterimage phenomena when LCD is shut off.

The invention discloses a display device, which comprises scanning wires, data wires, pixel transistors, pixel electrodes, a grid driver, a source driver and a discharge circuit. The data wires and the scanning wires are mutually crossed. Each pixel transistor is electrically coupled with the corresponding scanning wire and the corresponding data wire respectively, and each pixel electrode is electrically coupled with the corresponding pixel transistor. The grid driver is electrically coupled with the scanning wire, and the source driver is coupled with the data wire. The discharge circuit is electrically coupled with the grid driver and the data wire and is started to control the grid driver to simultaneously conduct the pixel transistors when the display device is closed, and the pixel electrode is electrically coupled with a reference voltage through the data wire and the discharge circuit. The invention also discloses a ghost eliminating method corresponding to the display device.

The invention discloses a liquid crystal display and a method for detecting and eliminating residual shadows. The liquid crystal display comprises a driving circuit board, a grid driver and a detecting module, wherein the driving circuit board is provided with a direct-current power converter and a time schedule controller, wherein the direct-current power converter is used for receiving a power signal, and the time schedule controller is used for receiving an input signal; the grid driver is electrically connected with the direct-current power converter and the time schedule controller and also electrically connected on a panel; and the detecting module is electrically connected with the grid driver and used for detecting the power signal and the input signal. When judging that the power signal and the input signal are abnormal, the detecting module outputs an output pulse signal to the grid driver to eliminate residual shadows.

The invention discloses a pixel circuit, a driving method of the pixel circuit, a display panel and a display device. The pixel circuit comprises a node initialization module, a data writing module, a coupling module, a luminescence control module, a drive transistor and a luminescent component, wherein before luminescence of the luminescent component, the node initialization module provides a reference signal to a grid of the drive transistor; and the data writing module is used for conducting a third switching transistor when the reference signal is written into the grid of the drive transistor by virtue of the node initialization module, so that the reference signal, which is received by the grid of the drive transistor, is driven to be provided to a second electrode of the drive transistor. By simultaneously resetting the grid and the second electrode of the drive transistor in an initialization stage, current directions in the initialization stage and in a data writing stage can be kept opposite to a current direction in a luminescence stage, threshold voltage deviation, caused by long-time bias, of the drive transistor can be recovered, and subsequently, the occurrence of a ghosting phenomenon can be prevented.

A liquid crystal display enabling to eliminate ghost off consists of face plate with multiple pixel unit for displaying image; detection circuit for generating a switch signal; source electrode driver including a processing unit for providing a data signal voltage, multiple the first switch unit for connecting data signal voltage through to each first pixel unit of said face plate when switch-signal is on the first state and multiple the second switch unit for electric-connecting through each first pixel unit when switch signal is on the second state.

The embodiment of the invention provides a display device, electronic equipment and a display method. The display device comprises a first display area, a second display area, a power supply management chip and a driving control chip, the power management chip is electrically connected with the first pixel layer in the first display area and the second pixel layer in the second display area, and the driving control chip is electrically connected with the power management chip and is used for controlling the power management chip to provide a first power supply voltage for the first pixel layerand provide a second power supply voltage for the second pixel layer, so that the brightness of the first pixel layer is the same as that of the second pixel layer. On the basis, the relative relation between the first power supply voltage and the second power supply voltage is adjusted, according to the technical scheme, the brightness difference between the first pixel layer and the second pixel layer can be compensated, so that the brightness of the first pixel layer is the same as that of the second pixel layer, no obvious boundary exists between the first display area and the second display area, and the ghost phenomenon between the display areas due to large loss difference of display elements is avoided.

The invention provides a display panel, a display device and a driving method of the display panel. The display panel comprises at least one pixel circuit group. The pixel circuit group comprises an output switching unit, a first pixel driving circuit and a second pixel driving circuit. The output switching unit comprises a first output signal end, a second output signal end, a first input signalend and a second input signal end. The first pixel driving circuit is electrically connected with the first input signal end, and the second pixel driving circuit is electrically connected with the second input signal end. The light-emitting device comprises a first light-emitting device and a second light-emitting device, the first light-emitting device is electrically connected with the first output signal end, and the second light-emitting device is electrically connected with the second output signal end. The output switching unit controls the pixel driving circuits in the pixel circuit group to drive different light emitting devices in the first stage and the second stage. According to the display panel, the display device and the driving method of the display panel, the ghost shadowphenomenon of the display panel is reduced, and the display effect is improved.

The invention discloses a driving method of a pixel driving circuit, a display panel and a display device, and relates to the field of display, the pixel driving circuit comprises a driving transistor, a first reset module, a first light emitting control module, a storage capacitor and a compensation module; the gate of the driving transistor is electrically connected with the first node, the first end of the driving transistor is electrically connected with the second node, and the second end of the driving transistor is electrically connected with the third node; the driving method comprises a resetting stage, high and low potential alternate resetting is carried out on the first node for multiple times in the resetting stage, and the last resetting is effective level resetting of the driving transistor. According to the invention, the first node is subjected to repeated high-low potential alternate resetting, so that the hysteresis problem of the driving transistor is avoided, and when a black picture is switched to a white picture, the brightness can quickly reach the brightness of white, and the ghost shadow phenomenon is avoided.

The present invention discloses a liquid crystal display for eliminating remnant shadows, which comprises a source cathode driver, a grid driver and a plurality of pixel units. Each pixel unit comprises a switch unit, a pixel electrode, a first electrode, a second electrode, a liquid crystal capacitor and a storage capacitor. The switch unit is used to communicate a pixel data voltage when receiving a driving signal voltage. The first electrode is used to provide a first signal voltage. The second electrode is used to provide a second signal voltage. The first pole of the liquid crystal display is electrically connected with the first electrode; a second pole is electrically connected with the pixel electrode; so the liquid crystal molecules in the liquid crystal display can be driven according to the pixel data voltage and the first signal voltage. The first pole of the storage capacitor is connected with the pixel electrode; the second pole is electrically connected with the second electrode; wherein, the quasi bit of the second signal voltage is bigger than the quasi bit of the first signal voltage.

The invention relates to the technical field of electronic paper, and provides an electronic paper display device. The electronic paper display device comprises an electronic paper display panel, a first storage circuit, a first driving circuit, a second storage circuit and a second driving circuit, wherein the first storage circuit is used for storing a driving waveform; the first driving circuitis used for acquiring the driving waveform in the first storage circuit and providing the driving waveform for the display panel; the second storage circuit is used for storing Vcom values at different temperatures; and the second driving circuit is used for receiving temperature information, selecting the Vcom value in the second storage circuit according to the temperature information and providing the Vcom value for a common electrode. According to the electronic paper display device, when the temperature of electronic paper changes along with the environment, the proper Vcom value can becorrespondingly provided, so that the voltage difference between a pixel electrode and the common electrode is the same as the driving waveform designed under the normal temperature condition, and thepositive and negative voltages are balanced.

The embodiment of the invention provides a method and device for eliminating afterimage and a storage medium, which are applied to an optical communication product or part comprising an LCOS panel andused for eliminating the afterimage generated by long-time fixation of a display picture of the LCOS panel. The method comprises the following steps: detecting that the LCOS panel is in a display state; and dynamically changing the driving voltage of the LCOS panel to dynamically adjust a picture corresponding to the LCOS panel, wherein the dynamically adjusted picture has the same display effectas the picture before dynamic adjustment. According to the embodiment of the invention, the afterimage phenomenon of a product using the LCOS technology during long-term work can be eliminated.

The embodiment of the invention provides a display control method and a display control device of display columns, which relate to the technical field of display and are capable of avoiding the display columns to be in the same state for a long time. The display control method comprises: displaying a first display column in a display column display zone of a terminal device, wherein the background and the display information of the first display column are in a first color assortment state; switching the first display column displayed in the display column display zone into a second display column if the display time of the first display column reaches a first preset time, wherein the background and the display information of the second display column are in a second color assortment state, and the first color assortment state is different from the second color assortment state.

The invention discloses a half-reversible display device and an operation method thereof; the half-reversible display device comprises a half-reversible display panel and a backlight module; the half-reversible display panel comprises a plurality of pixels; each pixel comprises a plurality of sub-pixels in different colors; each sub-pixel respectively is provided with a penetration zone and a reflection zone; the operation method of the half-reversible display comprises the following steps: determining whether the half-reversible display enters a reflection zone operation mode or not; when the half-reversible display enters the reflection zone operation mode, a mode in which at least one sub-pixel of each pixel is driven in each time is used to drive the half-reversible display, and the backlight module is shut, so the reflection zone of the driven sub-pixel can be used to reflect an environment light source of the half-reversible display for displaying.

A method for driving a plasma display panel(PDP) is provided to prevent a fluorescent material from being damaged due to excessive wall charges by preventing the wall charges from being excessively accumulated on respective electrodes. A PDP includes Y, Z, and X electrodes. One frame is divided into reset, address, and sustain periods. During the sustain period, a sustain pulse with a predetermined intensity is applied on the Y electrode. The sustain pulse alternates between positive and negative values. A triggering pulse is applied on the Z electrode before the sustain pulse is applied on the Y electrode. An application timing of the triggering pulse is sooner than the application timing of the sustain pulse by a predetermined phase. The triggering pulse alternates between positive and negative values.