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CN-121999721-A - Color consistency calibration system for AMOLED flexible display

CN121999721ACN 121999721 ACN121999721 ACN 121999721ACN-121999721-A

Abstract

The invention discloses a color consistency calibration system for AMOLED flexible display, which relates to the field of display and comprises a deformation sensing module, a color acquisition module, an aging state sensing and dynamic compensation module, a user personalized color gamut adaptation module, a data fusion processing module, a self-adaptive calibration algorithm module, a calibration execution module and a real-time feedback verification module. According to the color consistency calibration system for AMOLED flexible display, screen body stress and deformation data are captured through deformation sensing, the attenuation state of pixels is monitored through aging sensing, a personalized module is adapted to user color preference, partition integrated calibration parameters are generated through data fusion and a self-adaptive algorithm, and then a closed loop is formed through calibration execution and real-time feedback, so that the defects that deformation-aging compound drift is ignored and personalized adaptation is lacking in the prior art are overcome, the color consistency calibration of the AMOLED flexible screen in full scene and full life cycle is realized, the accuracy and the user experience are considered, and the AMOLED flexible display system is suitable for various flexible display terminals such as folding screens and curled screens.

Inventors

  • QU WEIFENG

Assignees

  • 深圳市佳佳伟业科技有限公司

Dates

Publication Date
20260508
Application Date
20260325

Claims (9)

  1. The AMOLED flexible display color consistency calibration system is characterized by comprising a deformation sensing module, a color acquisition module, an aging state sensing and dynamic compensation module, a user personalized color gamut adaptation module, a data fusion processing module, a self-adaptive calibration algorithm module, a calibration execution module and a real-time feedback verification module, wherein the modules are cooperated to realize closed-loop calibration; the deformation sensing module is used for collecting stress values, bending angles, curvature data and three-dimensional deformation contours of all areas of the AMOLED flexible screen in real time; The color acquisition module is used for acquiring color data of the whole domain and the partition of the screen body, and comprises RGBW four-channel brightness values and color coordinates (x, y); The aging state sensing and dynamic compensation module is used for collecting accumulated working parameters and working temperatures of pixels of each partition of the screen body, generating aging attenuation compensation parameters, and superposing the aging attenuation compensation parameters and color drift quantity caused by deformation to obtain composite color drift total quantity; the user personalized color gamut adaptation module is used for receiving the user personalized color gamut requirement, converting the user personalized color gamut requirement into color gamut constraint parameters and generating constraint conditions serving as calibration parameters; The data fusion processing module is used for preprocessing and fusing deformation data, color data and aging data, constructing a composite mapping model of deformation parameters, aging parameters and total color drift, and dynamically optimizing calibration partitions; The self-adaptive calibration algorithm module is used for generating integrated calibration parameters of zonal deformation compensation, aging compensation and personalized adaptation based on the total amount of compound color drift and the color gamut constraint parameters; The calibration execution module is used for converting the integrated calibration parameters into pixel driving signals to realize independent driving and parameter storage; The real-time feedback verification module is used for collecting color data after calibration, carrying out consistency and personalized dual verification, and triggering secondary calibration if the consistency and the personalized dual verification are not up to standard.
  2. 2. The AMOLED flexible display color consistency calibration system according to claim 1, wherein the deformation sensing module comprises a micro-strain sensor array and an optical deformation detection unit, the micro-strain sensor array is integrated on the edge of a substrate of the AMOLED flexible screen and in a stress sensitive area, the density is 10-20 pieces/cm < 2 >, and the sampling frequency is more than or equal to 100Hz.
  3. 3. The color consistency calibration system for AMOLED flexible display of claim 2, wherein the optical deformation detection unit in the deformation sensing module acquires a three-dimensional deformation profile of the screen body based on a laser triangulation ranging principle, and corrects local data deviation of the sensor array.
  4. 4. The AMOLED flexible display color consistency calibration system according to claim 3, wherein the aging state sensing and dynamic compensation module comprises an aging data acquisition unit, an aging attenuation model construction unit and a dynamic compensation logic unit, the aging data acquisition unit comprises a pixel-level accumulated working parameter acquisition module and a temperature sensor array, the sampling period is 1 min/time, the aging attenuation model construction unit trains a mapping model of accumulated working parameters-aging attenuation based on an LSTM algorithm, and the dynamic compensation logic unit superimposes the aging attenuation and deformation color drift to output the total amount of composite color drift.
  5. 5. The AMOLED flexible display color consistency calibration system as in claim 4, wherein said user-personalized color gamut adaptation module comprises a personalized demand input unit, a color gamut adaptation conversion unit, and a consistency assurance logic unit, wherein said demand input unit supports preset mode selection and custom adjustment, the custom adjustment range is limited to within + -10% of the standard color gamut, said consistency assurance logic unit sets a personalized adjustment threshold value, and ensures zoned color consistency error ≤1.5。
  6. 6. The flexible AMOLED display color consistency calibration system as recited in claim 5, wherein said data fusion processing module employs And constructing a composite mapping model by a hybrid deep learning algorithm, denoising sensor data by Kalman filtering, and dynamically adjusting a calibration partition boundary according to the total amount distribution of composite color drift.
  7. 7. The flexible display color consistency calibration system of AMOLED of claim 6, wherein the adaptive calibration algorithm module adopts a reinforcement learning algorithm to minimize the color consistency error of the partition and maximize the personalized demand satisfaction into a double-target rewarding function, the calibration parameters are required to meet the OLED pixel life threshold, the driving voltage fluctuation is less than or equal to + -5%, and the aging acceleration of the screen body caused by excessive calibration is avoided.
  8. 8. The AMOLED flexible display color consistency calibration system according to claim 7, wherein the calibration execution module comprises a partition driving control unit and a parameter writing unit, wherein the partition driving control unit realizes partition independent driving through a T-con chip, the calibration parameter updating frequency is synchronous with the deformation sensing frequency, and the parameter writing unit stores plane standard parameters, historical scene parameters and personalized parameters, and similar scenes are directly called.
  9. 9. The color consistency calibration system of AMOLED flexible display as claimed in claim 8, wherein the consistency verification criteria of the real-time feedback verification module is that the color errors are partitioned in a professional mode Less than or equal to 1.0, in a non-professional mode The color matching degree is not less than 95% and the current calibration parameters are maintained when both the two standards are up to standard.

Description

Color consistency calibration system for AMOLED flexible display Technical Field The invention relates to the technical field of display, in particular to a color consistency calibration system for AMOLED flexible display. Background AMOLED flexible display has the advantages of being bendable, light, thin, portable and the like, and is widely applied to intelligent terminals such as intelligent mobile phones, tablet computers and wearable equipment; however, the AMOLED flexible screen has two major core problems in actual use, namely color drift caused by deformation, uneven stress distribution in different areas when the screen body is bent and folded, and caused by characteristic deviation of a pixel driving circuit and luminous efficiency change of a luminous material, brightness deviation and color coordinate deviation are caused; In the prior art, aiming at the color calibration scheme of the AMOLED flexible screen, the calibration scene is limited in the operation process, the off-line calibration is only carried out for the plane state, the dynamic color drift in the deformation state is not considered, the aging accumulation effect is ignored, the calibration result is invalid after deformation and long-term use, the calibration granularity is coarse, the global unified calibration parameters are adopted, the stress difference and the aging attenuation difference of different areas cannot be adapted, the individuation adaptation capability is lacking, only the consistency of a standard color gamut is focused, the requirement of a user on a specific color style cannot be met, or the color consistency is destroyed after individuation adjustment, meanwhile, the calibration logic is statically formed, a dynamic closed loop is not formed, and the complex deformation-aging-color drift association rule of the flexible screen is difficult to match. Disclosure of Invention The invention aims to provide a color consistency calibration system for AMOLED flexible display, which solves the problems that the existing color consistency calibration system for AMOLED flexible display is limited in calibration scene, only performs offline calibration on a plane state, does not consider dynamic color drift in a deformation state, ignores aging accumulation effects, causes failure of a calibration result after deformation and long-term use, has rough calibration granularity, cannot adapt to stress differences and aging attenuation differences of different areas by adopting global unified calibration parameters, lacks personalized adaptation capability, only focuses on consistency of standard color gamut, cannot meet requirements of users on specific color styles, or damages color consistency after personalized adjustment, and has static calibration logic, does not form a dynamic closed loop, and is difficult to match with complex deformation-aging-color drift association rules of a flexible screen. The AMOLED flexible display color consistency calibration system comprises a deformation sensing module, a color acquisition module, an aging state sensing and dynamic compensation module, a user personalized color gamut adaptation module, a data fusion processing module, a self-adaptive calibration algorithm module, a calibration execution module and a real-time feedback verification module, wherein the modules are cooperated to realize closed-loop calibration; the deformation sensing module is used for collecting stress values, bending angles, curvature data and three-dimensional deformation contours of all areas of the AMOLED flexible screen in real time; The color acquisition module is used for acquiring color data of the whole domain and the partition of the screen body, and comprises RGBW four-channel brightness values and color coordinates (x, y); The aging state sensing and dynamic compensation module is used for collecting accumulated working parameters and working temperatures of pixels of each partition of the screen body, generating aging attenuation compensation parameters, and superposing the aging attenuation compensation parameters and color drift quantity caused by deformation to obtain composite color drift total quantity; the user personalized color gamut adaptation module is used for receiving the user personalized color gamut requirement, converting the user personalized color gamut requirement into color gamut constraint parameters and generating constraint conditions serving as calibration parameters; The data fusion processing module is used for preprocessing and fusing deformation data, color data and aging data, constructing a composite mapping model of deformation parameters, aging parameters and total color drift, and dynamically optimizing calibration partitions; The self-adaptive calibration algorithm module is used for generating integrated calibration parameters of zonal deformation compensation, aging compensation and personalized adaptation based on the total amount of compound color drift