48results about How to "Improve afterimage phenomenon" patented technology

The invention provides a liquid crystal display device and a method for improving picture flash and image persistence. The device comprises a liquid crystal panel with N pixels, and a video controller capable of controlling display content of the liquid crystal panel; and the video controller displays a normal picture in modes that p is equal to n-m, p is equal to n+m and p is equal to n (n is more than m), and makes the normal picture reciprocate between p, n p and n pixels.

The invention discloses a positive-negative-mixed liquid crystal composition. The positive-negative-mixed liquid crystal composition is characterized by comprising a component A composed of at least one kind of negative compounds shown in the first general formula (please see the specification for the first general formula) and a component B composed of one or more kinds of positive compounds shown in the second general formula (please see the specification for the second general formula). The liquid crystal composition has the advantages of being positively dielectric, high in charge retention rate, low in rotary viscosity, short in response time and particularly high in transmittance; the positive-negative-mixed liquid crystal composition is suitable for manufacturing a high-transmittance and rapid-responding TFT-LCD.

The invention relates to a liquid crystal display and a driving method thereof. The liquid crystal display comprises a controller and a data driving circuit, wherein the controller is used for receiving image data. First subframe interpolated data and second subframe interpolated data are generated firstly according to the current image data and then a first subframe overdrive gray scale and a second subframe overdrive gray scale are output to the data driving circuit according to the first subframe interpolated data, the second subframe interpolated data and the image data of a previous frame. The liquid crystal display effectively improves the incomplete image phenomenon and has good display quality.

The invention provides a liquid crystal display device and a liquid crystal display method capable of improving picture twinkle and picture ghost. The liquid crystal display device comprises a liquid crystal panel provided with n pixels, and a video controller used for controlling a liquid crystal panel to display a content, wherein the video controller is used for displaying a normal picture through the pixels of p=n-m, p=n+m, and p=n (n is more than m), and the normal picture is reciprocated among p, n*p, and n pixels through the video controller.

An embodiment of the invention discloses a pixel circuit, a display panel and a driving method of the pixel circuit. The pixel circuit comprises a first light-emitting control module and a gate initialization module, wherein the first light-emitting control module comprises a control end, a first end and a second end, a first light-emitting control signal is accessed to the control end of the first light-emitting control module, a first power supply signal is accessed to the first end of the first light-emitting control module, and the second end of the first light-emitting control module is electrically connected with a first electrode of a driving transistor; and the gate initialization module comprises the control end, a first end and a second end, an initialization control signal is accessed to the control end of the grid initialization module, and an initialization voltage signal is accessed to the first end of the grid initialization module. Compared with the prior art, the problem of ghosting is solved, and the display effect of the display panel is improved.

The embodiment of the invention provides a driving method of a display panel, a driving chip and a display device, which relate to the technical field of display, and are used for effectively improving residual image phenomenon and improving display performance. The driving method comprises the following steps: monitoring the static pattern in the first display screen; when the display luminance value of the region where the static pattern is located and the display luminance value of the region where the background pattern is located satisfy the first preset condition, the region where the static pattern is located is defined as the first region; in the display process of the first display screen, the static pattern is controlled to move. Alternatively, in the display process of the second display screen after the first display screen jumps, the gray scale value of the sub-pixel in the second area is adjusted, wherein the second area is an area corresponding to the first area in the second display screen and the display brightness value is lower than the display brightness value of the first area. The driving method is used for driving the display panel to perform screen display.

The invention discloses a pixel circuit and a display panel. The pixel circuit comprises a driving transistor used for providing a driving current for a light-emitting device in a light-emitting stage, and the light-emitting device responds to the driving current to emit light. A first initialization module is connected between a grid electrode of the driving transistor and a first initializationpower supply end, and the first initialization module is used for providing the voltage of the first initialization power supply end to the grid electrode of the driving transistor in a first initialization stage. A second initialization module is connected between the grid electrode of the driving transistor and the second initialization power supply end, and before the first initialization stage, the voltage of the second initialization power supply end is provided for the grid electrode of the driving transistor, and the voltage of the first initialization power supply end is smaller than that of the second initialization power supply end. According to the invention, the hysteresis effect of the driving transistor can be weakened, the ghost phenomenon of the display panel where the pixel circuit is located can be further improved, and the display effect of the display panel is improved.

The invention provides a pixel driving circuit, a driving method thereof and a display device, wherein the pixel driving circuit, the driving method thereof and the display device belong to the fieldof displaying technology. The pixel driving method is applied to an OLED display panel and comprises the steps after the pixel of the OLED display panel displays current gray scale value preset time and before the pixel is switched from the current gray scale value to a target gray scale value, acquiring a corresponding voltage compensating value in switching the current gray scale value to the target gray scale value; compensating target data voltage which corresponds with the target gray scale value by means of the voltage compensating value, and obtaining an actual voltage value; and inputting the actual voltage value into the pixel. The pixel driving circuit, the driving method thereof and the display device can improve a ghost phenomenon of the OLED display device.

The invention discloses a liquid crystal display panel and a display device. The liquid crystal display panel comprises an opposite substrate, an array substrate and a liquid crystal layer, wherein the opposite substrate and the array substrate are oppositely arranged, the liquid crystal layer fills a space between the opposite substrate and the array substrate, the liquid display panel is provided with a plurality of pixel units which are arranged in an array way, at least one hole-shaped groove is formed in the surface, corresponding to the opposite substrate and / or the array substrate, of each pixel unit, and is in a circular truncated cone shape with an increasingly enlarged opening, and the opposite surfaces of the opposite substrate and the array substrate are respectively provided with an orientation layer. The liquid crystal display panel has the advantages that when electric voltage is not applied, a long axis of a liquid crystal molecule in the liquid crystal layer corresponding to each pixel unit is vertical to the orientation layer with the action force on the corresponding liquid crystal molecule, so the liquid crystal molecule has certain inclining angle when the electric voltage is not applied; when the voltage is applied to the display panel, the liquid crystal molecule can be quickly turned to the proper position, so the response speed of the liquid crystal molecule is improved, the response speed of an inputted voltage signal is followed, the ghost effect of a picture is improved, and the quality of the picture is further improved.

The invention discloses a driving method, a driving device and a display device. The driving method is used for driving a display panel, and comprises the step of outputting a scan driving signal for each scan line in the display panel, wherein the scan driving signal comprises a plurality of frames of signals periodically distributed, each frame of signal comprises first voltage and second voltage, the first voltage is used for maintaining gating of each scan line in a first period, and is DC first high-level voltage; the second voltage is used for maintaining switching-off of each scan line in a second period, and is AC voltage, particularly, second low-level voltage and second high-level voltage output alternately; the first high-level voltage is larger than the second high-level voltage. According to the method and the devices provided by the invention, the second voltage for maintaining switching-off of each scan line is converted into the second low-level voltage and the second high-level voltage output alternately, so that the change of leakage current of a TFT in the display panel is effectively improved, image sticking phenomena in the display device are reduced, and the driving method is simple and easy to realize.

The invention discloses a pixel circuit, a display panel and a driving method of the display panel. The pixel circuit comprises a data voltage write-in module, a driving module, a light-emitting module, a light-emitting control module, a storage module and an induction module, and the induction module is electrically connected with the light-emitting module. In the light-emitting stage, the induction module senses the voltage of the light-emitting module and compensates the voltage of the light-emitting module, so that voltage signals compensated by the light-emitting modules in different pixel circuits are equal, the light-emitting brightness of the light-emitting modules in the different pixel circuits is the same, and the display uniformity of the display panel is improved. Moreover, the voltage of the light-emitting module is compensated by the sensing module according to the preset voltage in the light-emitting stage, so that the influence of the initial voltage of the driving module on the driving signal can be avoided, and the ghost phenomenon of the display panel during the switching of different frames is improved.

The embodiment of the invention provides a driving method of a display panel, a driving chip and a display device in the technical field of display, and is used for improving the ghost shadow phenomenon and improving display performance. The driving method comprises the steps of monitoring a static pattern displayed by the display panel in a first driving mode and when the display brightness value of the area where a static pattern is located and display brightness value of an area where the surrounding pattern is located meet preset conditions, defining the area where the static pattern is located as a target area; driving a pixel circuit in the target area in a second driving mode, in a second drive mode, enabling the grid line to scan the pixel circuit at a second frequency; wherein inthe first driving mode, the second frequency is greater than the first frequency of scanning the pixel circuit by the grid line, wherein in the second driving mode, the driving period of the pixel circuit comprises a signal switching period, an initialization period, a data signal writing period and a light emitting period, and in the signal switching period, the data line writes different data signals into the pixel circuit.

The invention discloses a pixel circuit compensation method, an OLED display panel and a compensation method thereof. The cross voltage of an OLED device between the anode and the cathode is determined by acquiring the anode potential of the OLED device in at least one pixel circuit of at least one color in the OLED display panel so as to compensate high-level signals loaded to the source / drain electrode of driving transistors in each pixel circuit of the color. The current of the OLED device increases along with attenuation of the OLED device in use, and the cross voltage change of the OLED device caused by the life attenuation of the OLED device is compensated to the high-level signals loaded to drive the source / drain electrodes of all the driving transistors of the OLED device of the color so as to improve the ghosting phenomenon.

The invention discloses a display device, a pixel circuit and a pixel circuit control method. The circuit comprises: a reset charging module, which charges a capacitor after resetting of the capacitor in bridge connection between a grid of a driving transistor of the pixel circuit and an anode of a light emitting diode; a write-in module, which writes data signals into the grid of the driving transistor; and a driving module, which comprises the driving transistor and drives the light emitting diode to emit light when the driving transistor receives the data signals. The driving transistor for driving the light emitting diode to emit light is an oxide TFT, and other transistors in the pixel circuit are LTPS TFTs. The hysteresis characteristic of the pixel circuit can be improved, and leakage current of the pixel circuit can be reduced. Therefore, afterimages of frames are overcome, and a problem of low contrast is solved.

The invention discloses a pixel circuit and a driving method thereof, a display panel and a display device. The pixel circuit comprises a driving module, a data writing module, a threshold compensation module, a first reset module, a light-emitting control module, a light-emitting module, a second reset module and a storage module, wherein the data writing module is used for writing data voltage into the driving module; the driving module is used for generating driving current; the light-emitting control module is used for transmitting the driving current generated by the driving module to the light-emitting module; the first reset module is used for resetting the control end of the driving module; the threshold compensation module is used for performing threshold compensation on the data voltage written into the driving module; the second reset module is used for resetting the anode of the light-emitting module; the storage module is used for storing the data voltage written into the driving module. According to the embodiment of the invention, the control end of the driving module can be effectively reset, and the display uniformity is improved.

The invention discloses a public voltage driving method. The method comprises the steps that the picture state of a current display picture is detected according to a preset sampling period, and a control signal is generated according to the picture state of the current display picture; and alternating current public voltage or direct current public voltage is generated according to the control signal. The invention further provides a public voltage driving device and a display device. The picture state of the current display picture is detected according to the preset sampling period. If thecurrent display picture is a dynamic picture, alternating current and direct current public voltage is generated according to the control signal. If the current display picture is a static picture, alternating current public voltage is generated according to the control signal to maintain voltage balance between liquid crystal positive and negative electrodes. Liquid crystal polarization is prevented, and the phenomenon of image-retention is improved.

The invention provides a driving method of a display unit and a driving circuit thereof. The driving method comprises the following steps: performing a first display program to display a first picture on the display unit and start a counting mechanism; judging whether the counting value of the counting mechanism is larger than a preset value or not before a second picture display program is determined to perform; firstly performing a special picture display program and then performing the second picture display program when the counting value is determined to be larger than the preset value; performing the second picture display program to display a second picture on the display unit when the counting value is determined to be smaller than or equal to the preset value.

A voltage adjustment method and apparatus of a liquid crystal display (LCD) panel. The method comprises: acquiring initial reference voltage (RV) values of gamma voltage pairs corresponding to respective gray scales, which includes a first and a second gamma voltage; fixing the first gamma voltages, adjusting respectively the second gamma voltages in accordance with flicker values of the brightness of the LCD panel and the initial RV values of the second gamma voltages, and acquiring the adjusted voltage values of the second gamma voltages; and adjusting synchronously, with an equal proportion, the initial RV value of the first gamma voltage and the adjusted voltage value of the second gamma voltage corresponding to each gray scale respectively, so that the brightness corresponding to the gray scale is adjusted to be the same as the brightness corresponding to the same gray scale in the gamma standard voltage curve.

The present invention discloses a method for improving remnant trace, which includes: firstly inserting at least one first gray-scale line in a frame at the position of the corresponding scalar scanning line, and inserting at least one second gray-scale line in a frame at the position of the corresponding scalar scanning line. A pixel unit has no remnant trace phenomena appeared when converting the pictures because of long-time displaying of the same picture, in virtue of the whole frame inserting the gray-scale line to different positions according to time sequence. The present invention can improve the remnant trace phenomena of the electronic frames and the LCDs, so the display can be more fitful for human visual demand and promote the displaying quality of the display.

The invention provides a display panel, in the display panel, a first driving thin film transistor is electrically connected to a first OLED device, and a second driving thin film transistor is electrically connected to a second OLED device; the first driving thin film transistor comprises a first active layer, and a channel part of the first active layer has a first width-to-length ratio; the second driving thin film transistor comprises a second active layer, and the channel part of the second active layer has a second width-length ratio; and the first aspect ratio is less than the second aspect ratio. According to the invention, the first width-to-length ratio is set to be smaller than the second width-to-length ratio, so as to change the electrical property of the first driving thin film transistor, thereby improving the ghost phenomenon of a picture.

A polymer comprising a unit represented by formula 1-1 or formula 1-2: formula 1-1, formula 1-2; and a unit represented by formula 2, formula 2, wherein R1 is a tetravalent organic group, R2 and R4 are divalent organic groups respectively, and R3 is a divalent organic group different from >R1(OH)2; the unit represented by formula 1-2 is obtained by dehydration and cyclization of the unit represented by formula 1-1 unit.

A driving method of a display unit includes: executing a first display procedure, for displaying a first frame on a display unit of the display driving circuit, and executing a counting mechanism; determining, if a second display procedure for displaying a second frame on the display unit is confirmed to be executed, whether or not a counting value of the counting mechanism is larger than a predetermined value; sequentially executing a specific display procedure and the second display procedure if the counting value is larger than the predetermined value; and directly executing the second display procedure if the counting value is equal to or smaller than the predetermined value. A display driving circuit applicable to be used by the display unit is also provided.

Embodiments of the present invention provide a display panel driving method, a driving device, and a display device. By taking the gray scale data in the current display screen, it is determined that the display brightness ratio of two adjacent pixels in the current display screen is greater than the preset ratio. The pixel is a boundary pixel, and the first driving mode is used to drive at least one boundary pixel in the display panel, so as to first write a data voltage corresponding to a grayscale value of 0 to the boundary pixel, and then write the display of the boundary pixel to the boundary pixel. The data voltage corresponding to the gray scale value makes the data voltage written in the boundary pixel switch between the data voltage corresponding to the 0 gray scale value and the data voltage corresponding to the displayed gray scale value. The implementation of the present invention can effectively improve the afterimage phenomenon caused by the hysteresis effect of the driving transistor when the display gray scale value is switched, and can improve the display effect of the display panel.

The invention discloses a pixel circuit, a driving method of the pixel circuit and a display panel. The pixel circuit comprises a data voltage write-in module, a driving transistor, a light emitting module, a storage module, a first transistor and an electric leakage compensation module. The data voltage write-in module is used for writing data voltage into the driving transistor. The first transistor is electrically connected with the grid electrode of the driving transistor, and the first transistor is a compensation transistor or a reset transistor. The storage module is electrically connected with the driving transistor and used for storing grid voltage of the driving transistor. The electric leakage compensation module is electrically connected with the grid electrode of the driving transistor for compensating the potential of the grid electrode of the driving transistor. The driving transistor is used for outputting a driving signal to drive the light-emitting module to emit light according to the gate voltage. When the voltage is written into the grid electrode of the driving transistor, the electric leakage compensation module performs electric leakage compensation on the grid electrode of the driving transistor, so that the residual time of a frame of ghost shadow on the display panel can be reduced, and the ghost shadow phenomenon of the display panel is improved.

The invention discloses a display device, a pixel circuit and a control method thereof. The circuit comprises: a reset charging module, which is used for charging a capacitance between a gate of a driving transistor connected across the pixel circuit and a positive electrode of a light-emitting diode. After resetting, the capacitor is charged; a writing module is used to write a data signal to the gate of the driving transistor; a driving module includes the driving transistor and is used to receive the data signal at the driving transistor When driving the light emitting diode to emit light; wherein, the driving transistor used for driving the light emitting diode to emit light adopts oxide TFT, and other transistors in the pixel circuit adopt LTPS TFT. The invention can improve the hysteresis characteristic of the pixel circuit and reduce the leakage current, thereby improving the problem of afterimage and low contrast of the display screen.

A method for driving a display panel, a driving chip and a display device are provided to ameliorate image retention and improve the display performance. The method includes: monitoring a static pattern in a first display image and defining an area where the static pattern is located as a first area when a display brightness value of the area and a display brightness value of an area where a background pattern thereof is located satisfy a first preset condition; and controlling the static pattern to move during displaying of the first display image, or adjusting grayscale values of sub-pixels in a second area during displaying of a second display image, to which the first display image jumps, the second area being an area, corresponding to the first area in the second display image and having a display brightness value lower than a display brightness value of the first area.

The invention relates to a driving method, which is suitable for driving a liquid crystal sub-pixel which is provided with n display areas. When the bias voltage applied on various display areas is all V0, the penetrating power of a liquid crystal layer in a liquid crystal sub-pixel is Tpixel; and when the bias voltage is subjected to delta V mutation, the penetrating power of the liquid crystal layer in the liquid crystal sub-pixel is mutated into S0. The driving method is to apply the bias voltage Vk on the various display areas, so that the penetrating power of liquid crystal layers in various display areas is Tk(Vk), wherein k is more than or equal to 1 and less than or equal to n, and n is more than or equal to 2; and the area of the various display areas is ak, and the ak and the Tk(Vk) meet a relational expression (1). When the bias voltage applied on the various display areas meets the relational expression (1) and is subjected to delta V mutation, the penetrating power of the liquid crystal layers in the various display areas is mutated into Sk(Vk), and the overall penetrating power of the liquid crystal layers in the liquid crystal sub-pixel is mutated into Spixel; and the Sk(Vk) and the Spixel meet a relational expression (2).

Embodiments of the present invention provide a display panel, a driving method thereof, and a display device, relating to the field of display technology, capable of making charging more sufficient, weakening the difference between the brightness of the first frame and other frames, and effectively improving the afterimage phenomenon. The above display panel includes: n pixel groups, each pixel group includes 2m pixel rows arranged along the first direction, n and m are positive integers greater than or equal to 1; each pixel row includes multiple pixel rows arranged along the second direction A pixel circuit; the pixel circuit includes: a driving transistor; a first reset module, configured to transmit the first reset signal provided by the first reset signal line to the gate of the driving transistor in response to the first scanning signal provided by the first scanning signal line , the first reset signal includes alternating high level and low level; the second reset module is used to respond to the second scan signal provided by the second scan signal line, and transmit the second reset signal provided by the second reset signal line to the organic The anode of the light-emitting element.