203 results about "Color coordinates" patented technology

The invention provides a processing method and device of a spliced display screen and a spliced display device, and belongs to the technical field of display. The spliced display screen comprises a plurality of sub-display screens spliced together, and the processing method of the spliced display screen comprises the steps that all the sub-display screens are controlled to display a full-white picture, and RGB data of each sub-display screen are detected; converting the RGB data into brightness and color coordinates of the sub display screens; sequentially performing color temperature correction, gamma correction and brightness correction on each sub-display screen according to the brightness and the color coordinates of the plurality of sub-display screens, so that the difference value between the color temperature of each sub-display screen and a target color temperature is not greater than a preset first threshold value, the difference value between the maximum brightness of each sub-display screen and the target brightness is not greater than a preset second threshold value. The display uniformity of the spliced display screen can be improved.

The invention discloses a method and device for detecting color reducibility of a mobile phone camera and a medium, and relates to the technical field of image quality detection.The method comprises the steps that after geometric alignment is conducted on a color card image set, color block areas are divided, and a cross-light-source color block observation matrix is obtained through color block feature extraction; converting the cross-light-source color block observation matrix into a target color space coordinate, and performing illumination correction to obtain a cross-light-source color coordinate matrix; inputting the cross-light-source color coordinate matrix into a deep learning model, outputting a color block level high-dimensional color embedding matrix, and obtaining a high-dimensional color embedding vector set corresponding to the tested mobile phone camera in combination with an attention weight; calculating a color reducibility error index based on the high-dimensional color embedding vector set in combination with the standard reference library; and performing qualification judgment according to the color reducibility error index to generate a qualification detection conclusion. According to the invention, a stable and reliable technical basis is provided for camera quality detection under a multi-light-source imaging condition.

The invention discloses a light color detection analysis method and system for an LED, and relates to the technical field of LED detection, and the system comprises a light color collection module which is used for obtaining spectrum data generated in the lightening process of a target LED; the time sequence modeling module is used for collecting a plurality of spectral data points at fixed time intervals within a continuous preset time period after the target LED starts to emit light, calculating to obtain a dominant wavelength, a color coordinate and a fitting color temperature value, forming a multi-moment light color parameter sequence, and constructing a time sequence model based on the sequence, and outputting the time sequence model and the corresponding original parameter sequence. According to the method, the change curve of the light intensity and the color coordinates is constructed, and a convergence trend analysis mechanism is introduced, so that the LED light-emitting stable state is automatically judged, wrong judgment caused by unstable early data is effectively avoided, and the representativeness and the accuracy of detection data are improved.

The invention relates to the technical field of LED display testing, in particular to an LED screen backlight module performance testing system which comprises the steps that a model identification code of a module to be tested is received, a corresponding standard optical parameter set is called, and initial driving current is applied. Actual optical signals driven by different currents are collected through a light sensing probe array and converted into a digital optical measurement value set containing brightness and color coordinate values of multiple sampling points. Comparing the brightness measurement value with a target brightness value point by point to generate a brightness consistency deviation matrix; and judging the color coordinate measurement value and the target range, and generating a color coordinate qualified identifier list. And calculating an actual brightness uniformity value according to the deviation matrix, and comparing the actual brightness uniformity value with a standard threshold value. And if the actual brightness uniformity value reaches the standard and the color coordinates of all the sampling points are qualified, generating a module qualification judgment instruction. According to the system, automatic and high-precision comprehensive evaluation of brightness space uniformity and chromaticity consistency of the backlight module is realized.

The invention discloses a multi-channel multi-color-temperature intelligent light source system for consistency calibration of a camera module and an optimization method, and the calibration system generates PWM signals through an STM32F103ZET6 main control unit of a light source controller to control the light output of each group of cold and warm LEDs so as to provide a stable and adjustable illumination environment; measuring reference brightness and chromaticity parameters of cold light and warm light of each group of LEDs, setting a target brightness value and a color temperature value, and converting the target brightness value and the color temperature value into target chromaticity coordinates; the initial PWM duty ratio of the cold and warm light LED is calculated, a piecewise polynomial nonlinear compensation algorithm is adopted to correct the duty ratio, and the LED is driven to output mixed light meeting the target brightness and color temperature; collecting a large amount of brightness and color temperature data by cyclically and gradually adjusting the duty ratio, and generating an error thermodynamic diagram; and the compensation model coefficient is optimized and updated according to error analysis, so that the light source output keeps high-precision consistency in a full range. Compared with the prior art, the method has the advantages that the brightness and color temperature consistency of the light source can be automatically calibrated and continuously optimized, the accuracy and stability of OTP burning calibration of the camera module are greatly improved, and the production test efficiency and the product imaging quality are improved.

A light-emitting diode device includes light-emitting diodes, a storage module, a control module, a driving module, and a package structure. The light-emitting diodes emit different colors of light. The storage module pre-stores color coordinate reference information and brightness reference information corresponding to a current / voltage of the light-emitting diodes. The control module receives the color coordinate reference information and the brightness reference information corresponding to the light-emitting diodes, and uses the color coordinate reference information, the brightness reference information, the color coordinate requirement information, and the brightness requirement information according to a light mixing algorithm to generate a first control signal. The driving module generates a driving signal according to the first control signal to drive the light-emitting diodes to emit a light having a color coordinate and brightness that meet requirements. The package structure accommodates the light-emitting diodes, the storage module, the control module, and the driving module.

The invention relates to the technical field of curved surface display, and discloses a display compensation method and system of a curved surface display panel. The method comprises the following steps: acquiring original brightness data of the curved surface display panel at different visual angles, and establishing a compensation reference library containing an incidence relation between a brightness attenuation gradient and a curvature radius; dividing a main compensation area, a transition compensation area and an edge compensation area according to the reference library, and determining the compensation intensity grade of each area; a dynamic compensation strategy containing a brightness decay prediction model and a color coordinate offset correction model is configured for the main compensation area; after generating an initial compensation parameter set based on the strategy, verifying the effectiveness through curved surface deformation simulation; and if the verification is passed, the parameter set is loaded to the display driving chip, and compensation is completed. According to the method, through accurate reference library construction, refined region division, a dynamic compensation strategy and comprehensive simulation verification, the display consistency of the curved surface display panel is effectively improved, the display quality under different visual angles is improved, and the method is suitable for various curved surface display devices.

The embodiment of the invention discloses a display device and a control method of the display device, and relates to the technical field of display, the display device comprises a backlight module, a liquid crystal panel and a backlight driving circuit, the backlight driving circuit determines target backlight data according to initial backlight data and preset reference data, and a first target color coordinate is taken as a reference, so that the first target color coordinate is obtained; the initial backlight data is converted into target backlight data, color cast caused by conversion is reduced, and meanwhile, under the condition that the initial backlight data is backlight data corresponding to a white field picture or a gray field picture, the target backlight data obtained through conversion can make at least one of a red light-emitting light source, a green light-emitting light source and a blue light-emitting light source emit light; therefore, the light-emitting color cast phenomenon of the white light-emitting source is improved. Backlight supply is achieved through the light-emitting light sources corresponding to red, green, blue and white, so that the energy consumption of the display device is reduced, and meanwhile the display effect of the display device can be guaranteed.

The invention discloses a near BBL curve LED white light color mixing method, system and lamp, a first color temperature light source and a second color temperature light source are selected in a preset color coordinate area, and a color point range is determined for each of the first color temperature light source and the second color temperature light source based on calculation of an intermediate color temperature point light source color deviation value extreme value on a target light mixing path; and selecting the first color temperature light source and the second color temperature light source of which the color coordinates are located in the corresponding color point range, and adjusting the luminous flux output proportion of the two light sources for light mixing so as to form intermediate color temperature light. The problems that a multi-CCT light and color modulation product adopts two light sources, the color temperature and color tolerance between the two light sources cannot meet the requirements of customers, and the color deviation value of the light sources obviously deviates from a BBL curve are solved.

The embodiment of the invention provides an image processing method and device and a storage medium. The method comprises the following steps: acquiring a to-be-matted image; the distance between the color coordinate of each pixel point in the to-be-matted image and a predetermined hyperplane is determined, and the hyperplane is the classification boundary of the background color and the non-background color of the to-be-matted image; and determining the probability that each pixel point is the foreground region of the to-be-matted image based on the distance corresponding to each pixel point, and performing matting processing on the to-be-matted image based on the probability. According to the embodiment of the invention, the distribution range of the background color can be accurately defined by using a high-dimensional hyperplane, so that the matted foreground region and background region are more accurate, and the matted image with natural transition is obtained.

The embodiment of the invention provides a control method of a backlight unit, a display device, a storage medium and a program product, brightness data of multiple frames of images is acquired, the brightness data comprises brightness values of multiple color light sources, and positive compensation and / or negative compensation are / is performed on the brightness values of the color light sources of at least part of the frames of images. And controlling a difference value between the brightness value sum of each frame of image after compensation and the brightness value sum of each frame of image before compensation to be smaller than a preset difference value, so that the brightness value sum of each frame of image after compensation is close to the brightness value sum of each frame of image before compensation. The temperature rise amount is suppressed through the change of the brightness data, so that when the brightness of the light source in the backlight unit is controlled based on the compensated brightness data, the color drift phenomenon can be suppressed, and the change rate of the brightness and the color coordinates can be reduced.

The application provides a color deviation compensation method and system of an LED atmosphere lamp group, which comprises the following steps: collecting the junction temperature of the LED atmosphere lamp group in real time; obtaining the color deviation corresponding to the junction temperature according to the junction temperature and a preset temperature-color deviation database; the temperature-color deviation database is used to represent the nonlinear mapping relationship between the junction temperature and the color deviation; correcting the preset target color coordinates reversely according to the color deviation to obtain corrected color coordinates; determining the mixing ratio of RGB three channels according to the corrected color coordinates and the three primary color coordinates of the LED atmosphere lamp group; determining the PWM duty cycle of the RGB three channels according to the mixing ratio; and sending the PWM duty cycle to a driving chip to drive the LED atmosphere lamp group to light up. The application improves the color deviation compensation precision.

The invention relates to a color gamut mapping method and device, computer equipment, a chip and a chip module. The method comprises the steps of querying a pre-constructed color gamut boundary corresponding relation based on a target direction axis coordinate value in converted color coordinate values of a sampling point of a to-be-processed image and a chromaticity coordinate value of the sampling point, and obtaining an input color gamut boundary and an output color gamut boundary corresponding to the sampling point; according to the input color gamut boundary and the output color gamut boundary, mapping the color coordinate value to obtain a target color coordinate value corresponding to the sampling point; smoothing the target color coordinate value to obtain a processed target color coordinate value corresponding to the sampling point; and obtaining a target image corresponding to the to-be-processed image based on the processed target color coordinate value. By adopting the method, the color gamut mapping accuracy can be improved.

The invention discloses an RGB-LED spectrum closed-loop system for colorimetry teaching and a color matching method. The system comprises a multi-source input module, a spectrum database module, a dynamic modeling module, an optimization algorithm engine module, a duty ratio calculation module, a PWM driving module and a closed loop verification module. The system is provided with a multi-source input interface, target color coordinates can be obtained, and chromaticity conversion of RGB input is supported; on the basis of the constructed high-precision linear model, solving a normalized strength ratio under constraints by combining an optimization algorithm engine and taking minimization of chromatic aberration as a target; calculating an actual PWM duty ratio according to the actual PWM duty ratio; meanwhile, a spectral irradiation sensor is integrated to collect a mixed color spectrum in real time, actual color coordinates are calculated, and an offset connecting line with an arrow between a target point and an actual point is dynamically drawn in a chromaticity diagram, so that a set of complete visual teaching tool is formed. Compared with a manual color matching scheme, the color mixing precision and the color matching efficiency are greatly improved, and the teaching requirements of colorimetry can be better met.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The first polyester is contacted with a further organic compound in a volume section V3 to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3 to obtain a first intermediate mixture. The first intermediate mixture comprises a first intermediate product and, the further organic compound. A b value of the Hunter Lab colour coordinates of the first intermediate mixture is adjusted in a volume section V5. The b value of the Hunter Lab colour coordinates of the first intermediate mixture is adjusted so that b≤0.

This application relates to an image processing method, apparatus, and computer device. The method includes: performing face recognition on a target image to obtain a target face region; determining target pixel information for each target pixel in the target face region based on reference pixel information of each reference pixel in a reference face region of each frame of the original image; for each target pixel, converting the target pixel information into color coordinates, and determining the weight of the target pixel based on the hierarchical relationship between the color coordinates and the range of human face coordinates; for each frame of the original image, determining the reference brightness of each reference pixel in the reference face region of the original image based on the weight of each target pixel and the original brightness of each reference pixel in the reference face region of the original image; and determining the current brightness of the target face region based on the reference brightness of each reference pixel in the reference face region. This method can improve the accuracy of face region brightness.

The invention discloses a color calibration method and device, projection equipment and a storage medium, and relates to the technical field of projection. The method comprises the following steps: carrying out white balance calibration under a target color gamut on projection equipment; the calibrated projection equipment sequentially projects a single-color picture of each color in the six original colors; obtaining the current color coordinates of the projected monochromatic pictures of each color in sequence through a color corrector; adjusting the color adjustment parameter corresponding to each color in the projection equipment until the current color coordinate of the monochromatic picture of each color projected again after the parameter adjustment is detected is matched with the standard color coordinate of the monochromatic picture of each color in the target color gamut, and obtaining the standard color adjustment parameter of each color in the projection equipment. Therefore, the projection equipment after white balance calibration can perform color calibration on the to-be-projected picture by using the standard color adjustment parameter corresponding to each color in the six original colors and then output the to-be-projected picture, so that the color accuracy of the projected picture is improved.

The application provides a lamp color adjusting method, a lamp and a lighting system. The lamp color adjusting method specifically comprises: establishing a coordinate mapping relationship between color coordinates of a lamp and polar coordinates on a color circle; obtaining initial polar coordinates according to initial color coordinates and the coordinate mapping relationship; obtaining an offset angle; forming target polar coordinates based on the initial polar coordinates and the offset angle; obtaining target color coordinates corresponding to the target polar coordinates according to the target polar coordinates and the coordinate mapping relationship; and adjusting the color of light emitted by the lamp based on the target color coordinates. Through the lamp color adjusting method, the color of light emitted by the lamp can be quickly changed according to the value of the obtained offset angle, and different light effects can be presented.

The application discloses a kind of LED light-emitting diode light color detection analysis method and system, it is related to LED detection technical field, including: light color acquisition module, for obtaining the spectral data generated in the lighting process of target LED;Timing modeling module, for in the continuous preset time period after target LED starts to emit light, multiple spectral data points are collected at fixed time intervals, main wavelength, color coordinates and fitting color temperature value are calculated to obtain, form multiple time light color parameter sequence, and construct time series model based on the sequence, output time series model and corresponding original parameter sequence.The application realizes the automatic judgment of the stable state of LED light emission by constructing the change curve of light intensity and color coordinates and introducing convergence trend analysis mechanism, effectively avoids the false determination caused by early data instability, and improves the representativeness and accuracy of detection data.

A compensation system of a display device according to an embodiment includes a display panel including a first emission area and a second emission area different from the first emission area, each of the first emission area and the second emission area including one or more pixels, a camera configured to capture the display panel at one or more viewpoints, and a compensation controller calculating color coordinate data of the first emission area and the second emission area and generating grayscale compensation data based on the color coordinate data. The grayscale compensation data may be for controlling grayscale values of the one or more pixels included in the second emission area.

The present application discloses a display control method and device for an electronic device, an electronic device, and a storage medium, belonging to the field of display control technology. The display control method includes: obtaining posture information and viewing angle information of the electronic device, and determining M target display units among N display units; determining the equivalent color coordinates of each target display unit based on the posture information and viewing angle information, thereby obtaining M equivalent color coordinates; determining a first color compensation value for each target display unit based on each of the M equivalent color coordinates, thereby obtaining M first color compensation values; determining a second color compensation value for each non-target display unit based on the M first color compensation values; and controlling the display content of the display panel based on the first color compensation values ​​and the second color compensation values.

The application discloses a multi-primary color system primary color parameter optimization method, comprising the following steps: step one, determining the primary color number and white point color temperature of a display; step two, obtaining color coordinates according to the spectrum of a primary color light source; step three, in the CIEXYZ space, setting the white point of a display gamut to be consistent with the white point of a target gamut, calculating the solution space of the multi-primary color system, and then obtaining the brightness of each primary color, and calculating the three stimulus values of all primary colors according to the color coordinates of each primary color; step four, selecting a uniform color space for color gamut evaluation, calculating the primary color vector of the primary color system, transforming the parallel polyhedron formed in the CIEXYZ space into the selected uniform color space, and obtaining the boundary of the display gamut; step five, comparing the display gamut boundaries corresponding to different points in the solution space, that is, obtaining the optimal brightness combination of each group of primary colors; comparing the solution spaces of different primary colors, that is, obtaining the optimal primary color combination, and realizing the primary color design of the multi-primary color display.

A gamma correction method for a display device determines a first voltage code for a first color corresponding to each of grayscale values based on a target gamma value and a target color coordinate at a reference measurement point, generates a first lookup table including the first voltage code for the first color, determines a second voltage code for the first color corresponding to each of the grayscale values based on the target gamma value and the target color coordinate at a correction measurement point, generates a first color position correction value based on the first voltage code for the first color and the second voltage code for the first color, and performs gamma correction using the first color position correction value and the first lookup table.

The invention relates to a display device, a method of compensating brightness and color of the display device, and an electronic device. The display device includes: a display panel including a plurality of compensation areas, each of the plurality of compensation areas including at least one pixel; a driving controller including a compensation controller and a luminance color compensator, the driving controller performing luminance and color compensation for each of the plurality of compensation regions and generating a voltage code and a data signal; a gamma reference voltage generator receiving the voltage code and generating a gamma reference voltage based on the voltage code; and a data driver connected to the driving controller and the gamma reference voltage generator, and generating a data voltage based on the data signal and the gamma reference voltage. Each of the plurality of compensation regions after luminance and color compensation may have a target gamma value and a target color coordinate. The plurality of compensation regions may be shifted while brightness and color compensation is performed.

A light-emitting diode device comprises a plurality of light-emitting diodes, a storage module, a control module, a driving module and a packaging structure. The light-emitting diodes emit different colored lights. The storage module pre-stores color coordinate reference information and brightness reference information. The control module receives the chromaticity coordinate demand information and the brightness demand information, and generates a first control signal according to the chromaticity coordinate reference information, the brightness reference information, the chromaticity coordinate demand information and the brightness demand information according to a light mixing algorithm. The driving module generates a driving signal according to the first control signal and is used for driving the light emitting diode to emit color coordinates and brightness meeting requirements. The packaging structure is used for accommodating the light emitting diode, the storage module, the control module and the driving module.

The application discloses a method for solving color deviation of a three-color Mini LED backlight liquid crystal display device and a liquid crystal display device, and relates to the technical field of liquid crystal display, and comprises the following steps: adjusting RGB backlight currents of a white field, recording a set of RGB backlight current ratios when color coordinates of the white color reach design target values; adjusting RGB backlight currents of red, green and blue single-color fields respectively, recording a second set of RGB backlight current ratios, so that the RGB synthesis obtains the design target values, and obtaining coordinate points W, R, G and B of the white color, the red color, the green color and the blue color on a CIE chromaticity diagram respectively; performing segmentation processing on a to-be-displayed image, counting average image color coordinates of each block as to-be-displayed colors, obtaining a coordinate point C of the to-be-displayed colors on the CIE chromaticity diagram, and calculating RGB current values of backlight of the block according to relative positions of C, R, G, B and W and the two sets of RGB backlight current ratios. The application can guarantee a color gamut and solve the color deviation phenomenon.

The embodiment of the invention provides a light-emitting device, a driving method thereof, a driving device and electronic equipment. The light-emitting device comprises four kinds of light-emitting device sets, the color temperature of the first light-emitting device set is the lowest, the color temperature of the second light-emitting device set is the highest, and a triangle defined by color coordinate points of the first light-emitting device, the second light-emitting device and the third light-emitting device on a chromaticity graph comprises a target color temperature area. A triangle defined by color coordinate points of the first light-emitting device, the second light-emitting device and the fourth light-emitting device on the chromaticity diagram comprises a target color temperature area, and the method comprises the steps that according to the target color temperature, a first luminous flux output proportion and a second luminous flux output proportion are obtained; determining a target luminous flux output proportion according to the first luminous flux output proportion and the second luminous flux output proportion; and driving the four light-emitting device groups to emit light according to the target luminous flux output proportion. According to the invention, each target color temperature can be simulated more accurately, the color tolerance is reduced, and the spectrum quality under different color temperatures is improved.

A method of testing a compensation operation for a display device includes providing test data including red test data, green test data, and blue test data to the display device, capturing an image displayed by the display device based on the test data, generating red compensation data which is compensation data for the red test data, green compensation data which is compensation data for the green test data, and blue compensation data which is compensation data for the blue test data based on a luminance and a color coordinates of the captured image, and comparing a delta value, calculated based on red test data to which the red compensation data is applied, green test data to which the green compensation data is applied, and blue test data to which the blue compensation data is applied, with a threshold value to test whether the compensation operation is a miscompensation.

The invention discloses a display module, a control method thereof and a display device. The display module comprises a main screen (1) and an auxiliary screen (2) which are arranged in a stacked mode. The temperature sensor (3) is arranged on the auxiliary screen (2) and is used for measuring the working temperature of the auxiliary screen (2) corresponding to different time in a preset time period after the display module is started; wherein the preset time period is a corresponding time period from startup of the display module to stable working temperature of the display module; and the controller is used for determining screen temperatures corresponding to different times of the display module in a preset time period according to each working temperature and a temperature difference value between the surface of the secondary screen (2) and the surface of the main screen (1), and adjusting voltage related to color coordinates of pixels according to each screen temperature, the deviation of the color coordinate value of the picture displayed by the display module in the preset time period compared with the preset color coordinate value is smaller than or equal to 1%.

The invention provides a packaging method based on an LED flip chip fluorescent powder pre-coating process. The packaging method comprises the steps that a flip chip is pre-coated with a fluorescent powder layer; carrying out photoelectric testing on the flip chips to obtain color coordinate data of each flip chip, and generating a distribution diagram; obtaining a color point combination area of the flip chip; judging whether all the flip chips are located in the color point combination area or not according to the distribution diagram and the color point combination area; when one or more flip chips are out of the color point combination area, controlling die bonding equipment to combine the flip chips out of the color point combination area into the color point combination area for die bonding based on the distribution diagram and a preset die bonding algorithm, so that all the flip chips are positioned in the color point combination area; through the packaging method provided by the invention, the lamp beads which do not meet the color area requirement are not generated, so that the packaging yield is greatly improved, and the packaging yield can reach 100%.