Display Device Correction Data Generation via Center Characteristic Compensation
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Solution Overview
Problem
Existing display devices face challenges in simultaneously performing mura correction and image quality correction, leading to deteriorated performance and increased test process time due to variations in pixel luminance and gamma characteristics.
Innovation Solution
A method and device for generating correction data that involves obtaining characteristic distributions for initial display devices, generating center characteristic compensation data, and applying it to subsequent devices to perform mura correction and image quality correction, thereby reducing test time and improving correction accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mura correction and image quality correction are simultaneously performed, then correction comprehensiveness is improved, but performance of mura correction and/or image quality correction deteriorates
Solution Approach 1:
The patent divides the correction process into two separate stages: first performing mura correction to address luminance non-uniformity, then performing image quality correction to adjust gamma and color characteristics. This segmentation allows each correction type to be optimized independently, preventing performance deterioration that would occur if both were performed simultaneously.
Solution Approach 2:
The patent applies preliminary mura correction before performing image quality correction. By first compensating for luminance non-uniformity across the display panel, the subsequent image quality correction can focus solely on gamma and color characteristics without being confounded by luminance variations, thereby improving overall correction performance.
2Manufacturing precision
If mura correction and image quality correction are sequentially performed, then correction performance is improved, but test process time increases
Solution Approach 1:
The patent generates a single set of correction data that simultaneously addresses mura defects, gamma characteristics, and color coordinates through a unified correction algorithm. This multi-functional correction approach maintains high correction performance while reducing the number of separate correction passes required, thereby shortening test process time.
Solution Approach 2:
The patent modifies the correction algorithm to process multiple correction parameters (luminance uniformity, gamma, color coordinates) in a single operation by changing the mathematical model to handle multiple correction objectives simultaneously. This parameter integration maintains comprehensive correction performance while eliminating the time penalty of sequential processing.
3Measurement precision
If correction data is generated for each display device individually, then correction accuracy is improved, but test process time increases
Solution Approach 1:
The patent performs preliminary characterization of the display panel's luminance non-uniformity, gamma characteristics, and color coordinates during the manufacturing process. This preliminary measurement data is then used to pre-calculate correction values that can be applied to multiple devices from the same production batch, maintaining high correction accuracy while significantly reducing the time required for individual device testing.
Solution Approach 2:
The patent creates a master correction profile based on measurements from representative display devices and then copies or adapts this correction data to subsequent devices from the same manufacturing batch. This copying approach maintains consistent correction accuracy across multiple devices while dramatically reducing the time required to generate correction data for each individual device.
Data Source
AI summary
In a method of generating correction data for each of a plurality of display devices, a characteristic distribution for initial display devices among the plurality of display devices may be obtained, center characteristic compensation data may be generated based on the characteristic distribution for the initial display devices, the center characteristic compensation data may be applied to subsequent display devices that are subsequent to the initial display devices among the plurality of display devices, mura correction data and image quality correction data may be generated by performing mura correction and image quality correction on each of the subsequent display devices to which the center characteristic compensation data are applied, and the center characteristic compensation data, the mura correction data and the image quality correction data may be written into each of the subsequent display devices.