Brightness Parameter Correction for Display Panel Compensation Consistency
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Solution Overview
Problem
The inconsistency and instability of different machines used for brightness compensation result in undesirable compensation effects on display panels, as they produce varying brightness parameters, leading to suboptimal display performance.
Innovation Solution
A brightness parameter correction method that calculates a correction coefficient based on the deviation between tested and reference brightness parameters, ensuring the corrected parameters meet a preset standard, thereby standardizing the compensation across machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brightness compensation is performed using different machines, then the compensation process can be completed, but the brightness parameters obtained from different machines show poor consistency and stability, leading to undesirable compensation effects
Solution Approach 1:
The patent introduces a brightness acquisition device as an intermediary between the display panel and the compensation system. This device standardizes the measurement process across different machines, ensuring that brightness parameters are acquired consistently. The device includes a light source, lens, and sensor arranged in a fixed geometric relationship, which acts as a mediator to eliminate machine-to-machine variability in measurements
Solution Approach 2:
The patent transforms the raw brightness parameters acquired from different machines into standardized parameters by changing the measurement conditions. By controlling the light source intensity, fixed distances (150mm from light source to panel, 50mm from panel to sensor), and specific viewing angles (45-degree incident angle, normal detection angle), the measurement parameters are standardized to ensure consistency across different machines
2Productivity
If multiple brightness acquisition devices are used across different machines, then productivity increases, but the inconsistency between devices leads to poor stability in compensation results
Solution Approach 1:
The patent designs a universal brightness acquisition device that can be applied across multiple machines with the same measurement function. The device uses standardized components (light source, lens, sensor) with fixed geometric relationships, making it universally applicable to different machines while maintaining measurement consistency. This allows multiple devices to work interchangeably without affecting stability
Solution Approach 2:
The patent creates equipotential measurement conditions by standardizing the optical path and geometric relationships in the brightness acquisition device. All measurements are taken under identical conditions (fixed distances, angles, and optical configuration), placing all measurement points at the same 'measurement potential' level, which eliminates variability when using multiple devices across different machines
Data Source
AI summary
A brightness parameter correction method and device and a brightness compensation system. The method includes: obtaining a first to-be-tested brightness parameter of a designated sample display panel at a first gray level; obtaining a first deviation parameter between the first to-be-tested brightness parameter and a reference brightness; calculating a correction coefficient based on the first to-be-tested brightness parameter and the reference brightness parameter when the first deviation parameter is greater than a first preset standard threshold, the correction coefficient being such that a corrected first deviation parameter between a corrected first to-be-tested brightness parameter and the reference brightness parameter is less than or equal to the first preset standard threshold; obtaining a second to-be-tested brightness parameter of a target display panel at the first gray level; and correcting the second to-be-tested brightness parameter using the correction coefficient to obtain a corrected second to-be-tested brightness parameter.