707 results about "Grey level" patented technology

The invention provides a color stripe removing method and device and a display device.The method comprises the steps that a viewpoint mapping graph of a display panel is obtained, the viewpoint mapping graph comprises the corresponding relation between pixels and viewpoints of the display panel, and the pixels comprise multiple sub-pixels; according to the viewpoint mapping graph, determining the number and the arrangement sequence of sub-pixels corresponding to the first viewpoint in the first viewpoint period; and according to the number and the arrangement sequence of the sub-pixels corresponding to the first viewpoint in the first viewpoint period, adjusting the gray-scale values of the sub-pixels in the first viewpoint period so as to control the brightness of the sub-pixels in the first viewpoint period. By means of the method, color stripes appearing when the display device displays in a naked eye mode can be reduced or even eliminated, and therefore the naked eye display effect of the display device is improved.

A cockpit display system includes a cockpit, a first display apparatus, a first light sensor, a second light sensor and a brightness distribution calculation module. The first light sensor is suitable for detecting a first ambient light brightness. The second light sensor is suitable for detecting a second ambient light brightness. The brightness distribution calculation module is suitable for respectively calculating a first brightness and a second brightness of the first display area and the second display area of the first display apparatus under a same display gray level according to the first ambient light brightness and the second ambient light brightness. The first brightness and the second brightness are different from each other.

The invention belongs to the technical field of semiconductor display, particularly relates to a backlight and display drive cooperative control LED module system, and aims to solve the problems of brightness distortion, halo effect and energy efficiency degradation caused by disconnection of backlight and pixel control in high dynamic range display. The system generates adaptive backlight distribution through image semantic analysis and illumination field reconstruction, and realizes stable light output in combination with dynamic cutting compensation and temperature feedback; and the display driving end performs gray scale feedforward correction according to the backlight state, and introduces a cross-domain error back propagation mechanism to realize frame-level online calibration. And the dynamic response and the processing real-time performance are further optimized through motion vector sensing and double-phase time sequence scheduling. According to the system, the contrast ratio is increased to more than 100000: 1, the halo radius is reduced to 40% of that of a traditional scheme, the power consumption is reduced by 18%, and the visual experience and the operation stability are remarkably improved.

The invention relates to a display device. The display device comprises a display screen and a processor. The display screen is used for displaying images and comprises a plurality of pixels, and one pixel comprises a plurality of sub-pixels used for transmitting light of different colors. The processor is connected with the display screen and the backlight module, and the processor is configured to perform image analysis on the to-be-displayed image, obtain a gray scale average value of the to-be-displayed image, and obtain a corresponding multi-level classification label and a corresponding confidence coefficient; the confidence coefficient is used for representing the accuracy of the multi-level classification labels; determining a corresponding lookup table according to the multi-level classification label and the corresponding confidence coefficient; the lookup table comprises a corresponding relation between the multi-level classification labels and the pixel compensation gains; determining a pixel compensation gain according to the lookup table; calculating the pixel value of each pixel in the display screen according to the gray-scale value of each sub-pixel and the pixel compensation gain; and adjusting the transmittance of each pixel in the display screen based on the pixel value. The pixel compensation effect can be improved, and then the display effect is improved.

A display screen, and a display compensation method and display compensation device therefor. The display compensation method includes: acquiring actual measured brightness values of sub-pixel units in the display screen at target gray scales; mapping the actual measured brightness values to actual measured gray scales; establishing a function model relating compensation gray scale (dependent variable) to drive gray scale (independent variable); determining a constant of the function model based on the target gray scales and the actual measured gray scales and calculating compensation gray scales; acquiring a parameter which characterizes a degree of difference between the compensation gray scale and the corresponding target gray scale; and determining optimal compensation gray scales based on the parameter

A light emission control method comprises the following steps: (A) determining an N value; (B) obtaining M different presentation sequences; (C) in the current time interval, for each to-be-displayed picture, according to the picture gray-scale value corresponding to each light-emitting component in the to-be-displayed picture and the total number N of the sub-periods, determining the number of display time periods of units to which each light-emitting component is divided in each sub-period by using the current sequence; (D) in the next time interval, for each to-be-displayed picture, according to the picture gray-scale value corresponding to each light-emitting component in the to-be-displayed picture and the total number N of the sub-periods, determining the number of display time periods of units to which each light-emitting component is divided in each sub-period by using the next sequence; and (E) repeating the step (D) until the next sequence is the previous sequence of the current sequence, and returning to the step (C). Therefore, artifacts are improved.

The invention belongs to the field of LED display control, particularly relates to a software-definable LED driving chip gray scale display control method, and aims to solve the problems that the refresh rate of each gray scale cannot be flexibly adjusted, the nonlinear response of an LED driving chip and a lamp bead cannot be compensated, first scanning darkness cannot be solved and ghosting cannot be effectively eliminated in the prior art. The method comprises the following steps: determining the number of refresh cycles of one frame of display time and the number of gray scales displayed in each refresh cycle; calculating the initial gray scale weight of each gray scale bit, and adjusting the gray scale weight; scanning the transformation moment line by line according to each refresh cycle, and adjusting the position of the gray scale OE position in the subfield; and when to-be-displayed data is received, controlling the LED driving chip to complete gray scale display of the LED display screen. According to the method and the device, the refresh rate of each gray scale is flexibly adjusted, the nonlinear response is compensated, and the first scanning darkness and the ghosting are effectively eliminated.

This application provides a brightness compensation method for a display panel. The method includes: when detecting that the display panel displays a to-be-displayed image at a current display brightness value, determining a brightness interval in which the current display brightness value is located; determining gray level intervals corresponding to the brightness interval; and obtaining a gray level of the to-be-displayed image, and compensating each pixel unit in the display panel based on a brightness compensation value corresponding to a gray level interval in which the gray level is located.

The invention provides a driving method and a driving circuit of a display panel and a display device.In the driving method of the display panel, in each display frame, positive polarity gray-scale voltage and negative polarity gray-scale voltage are alternately output to pixel units, aging of liquid crystal molecules can be reduced through a polarity alternate driving mode, and meanwhile, the driving efficiency of the display panel is improved. The target gray scale voltage with the same polarity as the next frame is inserted between the adjacent display frames, charge loss caused by leakage current of the thin film transistor is compensated, additional hardware does not need to be added, the design cost and power consumption are reduced, leakage current compensation can be achieved only through time sequence optimization, the problems of ghost shadow, flicker, contrast reduction and the like are effectively solved, and the display quality is improved. And the display image quality is improved.

The invention discloses a driving method for a display device. The display device comprises a plurality of sub-pixels, scanning lines and data lines. The method comprises the following steps of: receiving picture data, wherein the picture data comprises a plurality of sub-pixel gray-scale values to correspond to sub-pixels; the absolute value of the difference value between a first sub-pixel gray-scale value corresponding to a first sub-pixel and a second sub-pixel gray-scale value corresponding to a second sub-pixel is calculated, the first sub-pixel is electrically connected with one of a data line and two scanning lines, and the second sub-pixel is electrically connected with the other one of the data line and the two scanning lines; and when the absolute value of the difference value is greater than or equal to the first threshold value, adjusting the sub-pixel gray-scale value of at least one of the first sub-pixel and the second sub-pixel. Wherein a difference absolute value between the adjusted sub-pixel gray-scale value of the first sub-pixel and the adjusted sub-pixel gray-scale value of the second sub-pixel is smaller than a difference absolute value between the adjusted sub-pixel gray-scale value of the first sub-pixel and the adjusted sub-pixel gray-scale value of the second sub-pixel.

A display apparatus includes a display panel and a display panel driver. The display panel driver determines whether a driving mode of the display panel is a low frequency driving mode, generates an age using a first grayscale acceleration coefficient if the driving mode of the display panel is not the low frequency driving mode, and generates the age using a second grayscale acceleration coefficient different from the first grayscale acceleration coefficient if the driving mode of the display panel is the low frequency driving mode. The first grayscale acceleration coefficient has a maximum value when a grayscale of an image is a maximum grayscale value, and the second grayscale acceleration coefficient has a maximum value when a grayscale of the image is equal to or greater than a predetermined reference grayscale value which is lower than the maximum grayscale value.

The present application provides a watermark embedding method and a display device. The watermark embedding method comprises the following steps. An input image is received by a processing circuit. A watermark signal is generated by the processing circuit according to time series data and a preset scheme to generate watermark information of the watermark signal. In each of a plurality of consecutive periods, the phases of the time series data are opposite and the average values of the gray scales of the preset scheme are equal during a dark state period and a bright state period. The watermark signal is embedded into the input image signal by the processing circuit to generate an output image signal with the watermark information. An image is displayed by a display panel according to the output image signal.

The application discloses a display device, a brightness compensation method, a storage medium and a computer device. The brightness compensation device of the display device of one embodiment comprises: a gray scale data acquisition module for acquiring gray scale data of each pixel, wherein the gray scale data comprises a pixel category and gray scale information; a distribution data calculation module for obtaining, from the gray scale data, a pixel category and a count value corresponding to the largest number of pixels at each gray scale value from among a first pixel, a second pixel and a third pixel, as distribution data; a reference data acquisition module for determining, from the distribution data corresponding to different gray scale values, distribution data with the largest count value as reference data; a brightness gain value determination module for determining, according to a preset gain model, an input parameter of the gain model from the gray scale data corresponding to the reference data, and obtaining a gain value; and a brightness compensation module for performing brightness compensation on a brightness value corresponding to each color pixel according to the brightness gain value.

This invention provides a method, apparatus, and quality management method for detecting defects in display panels, belonging to the field of display technology. The method for detecting defects in a display panel includes: confirming whether the display panel has defects based on its display status; if defects are found, acquiring an image showing the defects of the display panel based on received first indication information; displaying the acquired image; enlarging the displayed image according to a preset ratio; and determining a precise defect area based on the grayscale of each pixel corresponding to the displayed image, thereby determining the actual defect size of the display panel.

The invention relates to the technical field of micro display, and discloses a display panel and a preparation method thereof.The display panel comprises pixel units arranged in an array, each pixel unit comprises a driving circuit layer arranged on one side of a substrate, and each driving circuit layer comprises multiple metal wire layers and interlayer dielectric layers arranged between the adjacent metal wire layers; the display panel comprises an isolation structure arranged between any two adjacent pixel units, and the lower end of the isolation structure extends to be flush with the bottom face of any metal wire layer or any interlayer dielectric layer in the direction perpendicular to the substrate or extends into the substrate. The isolation structure comprises a bottom insulating layer and side wall insulating layers arranged on the side walls of any two adjacent driving circuit layers. The isolation grooves are formed between the pixels and are filled with materials such as gas, low-dielectric-constant media or metal, so that capacitive coupling, leakage current and inductive coupling between the pixels are reduced, and the problems of contrast reduction, color distortion, inaccurate gray scale and the like caused by crosstalk are solved.

The application belongs to the technical field of display, and provides a compensation circuit, a control method and a display device of a display device. The compensation circuit comprises a data receiving module, a judgment module, a data compensation module and a data transmission module connected in sequence. The data receiving module is used for receiving a data signal sent by a master control module. The judgment module is used for determining, based on the data signal, that the absolute value of a gray scale change value between a first pixel row and an adjacent second pixel row is greater than or equal to a preset gray scale value. The data compensation module is used for obtaining a digital signal correction value corresponding to the gray scale change value from a preset reference table as a digital signal encoding value of the second pixel row. The data transmission module is used for outputting the digital signal encoding value of the second pixel row to a driving circuit. The application can identify the interference phenomenon in advance and obtain the corresponding digital signal correction value, thereby eliminating the horizontal crosstalk phenomenon and improving the quality of the display picture.

Provided in the embodiments of the present disclosure are a luminance and chrominance calibration method and device, and a storage medium. The method comprises: controlling a display screen to display a preset test image, and controlling a colorimeter to collect luminance and chrominance data of the display screen; on the basis of the luminance and chrominance data, generating a smooth gamma table, and iteratively calculating red, green and blue calibration coefficients for each grayscale, so as to obtain a grayscale expansion mapping table; and on the basis of the grayscale expansion mapping table, performing full-grayscale expansion mapping processing on an input image, and controlling the display screen to display an output image that has been subjected to mapping processing. The embodiments of the present disclosure improve the smoothness of grayscale gradients and the color accuracy across all grayscale levels of display, meet both luminance and chrominance calibration requirements and full‑grayscale smoothness requirements, and reduce the calibration time, thereby improving the production efficiency.

The embodiment of the invention discloses a pixel compensation method and device, a time schedule controller and a display device. Through the pixel compensation method, the difference quantity of the two adjacent frames of display data can be judged according to the gray scale difference value of the two adjacent frames of display data, when the difference quantity is small or even the two adjacent frames of display data have no difference, the compensation algorithm can be adaptively closed, brightness compensation is not relatively carried out any more, then the granular sensation of the frames is reduced, and the image quality is improved. When the difference quantity is large, it can be determined that the video picture is in a dynamic change state, at the moment, a compensation algorithm is started, and naked eyes cannot easily perceive the granular sensation of the picture in the dynamic picture. Therefore, through the pixel compensation method provided by the embodiment of the invention, at least the technical problem that a multi-domain VA visual angle compensation algorithm causes a relatively strong grainy feeling of a picture can be solved.

The embodiment of the invention discloses a pixel circuit and a display panel, and belongs to the technical field of display. The pixel circuit comprises a light-emitting control circuit, the light-emitting control circuit comprises a memory and a time-delay circuit, the memory is set to store at least one bit of gray scale data, and the time-delay circuit is set to generate a light-emitting control signal capable of being delayed according to the gray scale data; and the light-emitting circuit is set to be conducted to emit light under the control of the light-emitting control signal. According to the embodiment of the invention, the problem that pixels in the same row and different columns are started during line-by-line scanning can be avoided.

The disclosure provides a defect detection method and device, a computer readable storage medium and an electronic device, and relates to the technical field of semiconductors. The defect detection method comprises: selecting a plurality of dies as sample dies from a wafer to be measured; wherein the wafer to be measured comprises a plurality of dies; determining the median of the gray scale of a position point in the same area of a plurality of sample dies in units of pixels; setting at least one reference die; wherein the gray scale value of the corresponding same position point of the reference die is the median in units of pixels; comparing the reference die with each die in the wafer to be measured one by one, and determining whether each die in the wafer to be measured has a defect according to the comparison result. The technical problem that the effect of the current defect detection method is poor is solved, and the defect detection effect is improved.

The application discloses a high-gray-scale debugging method and device based on voltage control, a terminal device and a storage medium. The method comprises the following steps: obtaining a target gray scale and attributes of an electronic paper to be debugged; determining a target voltage value corresponding to the target gray scale according to the target gray scale and a preset gray scale voltage mapping table; determining a basic voltage value of the electronic paper to be debugged and a corresponding debugging mode according to the attributes of the electronic paper to be debugged; calculating a driving voltage value of the electronic paper to be debugged according to the debugging mode, the basic voltage value and the target voltage value; and performing a gray scale debugging operation on the electronic paper to be debugged according to the driving voltage value and the target gray scale, so that the electronic paper to be debugged reaches the target gray scale. Through implementation of the application, the artificial operation debugging time is reduced, and the high-gray-scale debugging efficiency of the electronic paper is significantly improved.

The present application relates to organic light emitting display data processing technical field, especially high resolution organic display driving waveform generation method, through distributed parameter analysis, pixel matrix is divided into spatial block, using GPU node parallel extraction parasitic parameter and construct cross block coupling model, generate block parasitic parameter mapping table and characteristic vector matrix;Based on the residual charge data and dynamic gray scale segment control generation contains curvature parameter segmented waveform parameter set;Call brightness and voltage response data to execute nonlinear brightness correction, combined with light intensity feedback loop to generate compensation pulse parameters;According to the display content feature classification switch multi mode driving strategy, through phase locked loop phase synchronization to eliminate time sequence fault, the present application effectively suppresses parasitic effect interference and brightness mutation overshoot, improves the gray scale compensation accuracy and refresh rate synergy, enhances the display uniformity and dynamic picture smooth.

The application discloses a display device and a driving method thereof. The display device comprises a lamp bead and a micro-rotating device. The micro-rotating device is arranged on the light-emitting surface of the lamp bead. The micro-rotating device comprises a rotating plane, and the rotating plane comprises a first area and a second area with different transmittances. When the first area of the rotating plane rotates to the top of the lamp bead, the display device displays with a first gray scale brightness. When the second area of the rotating plane rotates to the top of the lamp bead, the display device displays with a second gray scale brightness. The micro-rotating structure with the first area and the second area with different transmittances is arranged on the light-emitting surface of the lamp bead. The brightness adjustment is realized by using the physical structure of the micro-rotating device, and the brightness adjustment is realized without the control of the gray scale voltage by the chip, so that the chip cost is reduced, and the inaccurate brightness adjustment caused by the voltage loss is avoided.

A display apparatus includes a display panel and a display panel driver. The display panel driver determines whether a driving mode of the display panel is a low frequency driving mode, generates an age using a first grayscale acceleration coefficient if the driving mode of the display panel is not the low frequency driving mode, and generates the age using a second grayscale acceleration coefficient different from the first grayscale acceleration coefficient if the driving mode of the display panel is the low frequency driving mode. The first grayscale acceleration coefficient has a maximum value when a grayscale of an image is a maximum grayscale value, and the second grayscale acceleration coefficient has a maximum value when a grayscale of the image is equal to or greater than a predetermined reference grayscale value which is lower than the maximum grayscale value.

The invention discloses a display screen bright and dark line adjustment optimization method and system and an LED display screen, and belongs to the technical field of display, and the method comprises the steps: obtaining brightness response data of a target display screen under multi-gray-scale input, and constructing a bright and dark line initial response distribution diagram; identifying a target gray stage based on brightness fluctuation characteristics, and extracting brightness deviation slope characteristics to construct a characteristic set; constructing a bright and dark line local response model based on the feature set; generating a driving adjustment vector in combination with the model, the brightness expected value and the current adjustment range; after the adjustment vector is applied to the display screen, brightness response is collected again, and an adjusted response matrix is constructed; comparing the brightness difference before and after adjustment, and if the preset tolerance is not reached, updating the model and repeatedly adjusting until the brightness consistency requirement is met; and finally outputting an adjustment scheme for batch optimization. According to the method, high-precision identification and iterative adjustment of bright and dark line defects are realized, the display uniformity is improved, and the method has good industrial application value.

The application discloses a method and device for establishing a brightness correction database of a display panel, and a brightness correction method and device for the display panel. The method comprises the following steps: obtaining brightness defect data of a pixel unit with a brightness defect in a detection image of the display panel, and classifying the brightness defect of the pixel unit according to the brightness defect data; fitting the brightness of the pixel unit corresponding to different types of brightness defects at different gray scales to obtain a plurality of brightness-gray scale curves; and obtaining brightness correction data of the pixel unit corresponding to different types of brightness defects according to the plurality of brightness-gray scale curves to form the brightness correction database. The speed and accuracy of the brightness defect correction of the display panel are improved.

Embodiments of the present application disclose an electronic price tag text image pixel processing method, device, equipment and medium. The method comprises: extracting font edge pixel points from the electronic price tag text image to be processed, selecting reference pixel points from adjacent pixel points, and determining the edge direction and brightness mixing direction of the font edge pixel points; performing negative direction and positive direction search according to the position and brightness mixing direction of the font edge pixel points, determining the mixing factor of the font edge pixel points according to the obtained negative search distance, positive search distance and preset balance factor, determining the mixed brightness value of the font edge pixel points according to the mixing factor, the brightness value of the font edge pixel points and the brightness value in the brightness mixing direction, and mapping the pixel processing result of the electronic price tag text image to be processed according to the mixed brightness value and the gray scale color supported by the electronic price tag image. The pixel is processed in gray scale according to the mixed brightness value in the brightness mixing direction, so as to improve the display clarity and smoothness.

In a first display pattern in which first input data corresponding to a first image is a first highest gray scale and second input data corresponding to a second image is a second lowest gray scale, a control unit sets the second lowest gray scale as display data of the second image, and in a second display pattern in which the first input data is a first lowest gray scale and the second input data is the second lowest gray scale, the control unit sets a gray scale larger than the second lowest gray scale as the display data of the second image.

The invention discloses a physiological state detection method, which is suitable for an electronic device, the electronic device comprises a display screen, a visible light camera and an infrared light camera, the visible light camera and the infrared light camera are arranged above the display screen, and the detection method comprises the following steps: receiving an infrared light image generated by the infrared light camera; receiving a visible light image generated by the visible light camera; capturing a first pixel range containing physiological features in the infrared light image, and reading gray-scale pixel values in the first pixel range; capturing a second pixel range containing physiological features in the visible light image, and reading a red pixel value in the second pixel range; and calculating the physiological parameter according to the gray-scale pixel value and the red pixel value.