Display Panel Gamma Correction Circuit for Unevenness Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
When the unevenness correction circuit is downstream of the gamma correction circuit, the luminance characteristics of the display panel are not defined as product specifications, leading to the need for individual adjustments, which can increase costs and production time if not accurately measured.
Innovation Solution
An unevenness correction system that includes a panel drive circuit with a gamma correction means, an unevenness correction means, and a correction data generation mechanism, where gamma correction information is used to generate correction data for each display panel, allowing for digital reading of image signals to adjust for individual characteristics without additional measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the unevenness correction circuit is downstream of the gamma correction circuit, then the gamma characteristics remain stable and do not change when gamma correction settings are modified, but the luminance characteristics of the display panel are not defined as product specifications and differ for each individual panel, requiring individual adjustments that increase costs and production time
Solution Approach 1:
The system performs preliminary measurement of the display panel's luminance characteristics during the gamma correction process. By measuring the actual luminance output and comparing it with the input gamma correction signal, the system预先 obtains the panel-specific characteristics data that will be used for subsequent unevenness correction, avoiding the need for separate measurement processes and reducing production time
Solution Approach 2:
The system implements a feedback mechanism where the actual luminance characteristics of each individual display panel are measured and fed back to the correction data generation process. This feedback loop enables the system to automatically adjust and generate customized correction data for each panel based on its specific characteristics, eliminating manual measurement and adjustment while maintaining accuracy
2Measurement precision
If optical measurement is performed to ascertain the characteristics of each individual display panel, then accurate correction data can be generated, but the measurement process and parameter determination take place before the unevenness correction process, resulting in characteristics measurement being performed all over again and increasing cost and production time
Solution Approach 1:
The system merges the gamma correction measurement process with the panel characteristics measurement process. By using the same measurement setup and data acquisition system for both gamma correction verification and panel characteristics assessment, the system eliminates the need for separate measurement processes, thereby maintaining measurement accuracy while significantly reducing production time and cost
Solution Approach 2:
The measurement system is designed to serve multiple functions: it verifies gamma correction accuracy, measures panel luminance characteristics, and provides data for unevenness correction. This multi-functional approach allows a single measurement process to accomplish what would traditionally require multiple separate processes, reducing both time and resource consumption
Data Source
AI summary
An unevenness correction system according to the present invention includes a panel drive circuit provided with a gamma correction circuit that performs gamma correction on an image signal input to an input interface, a gamma correction information acquisition circuit that acquires a gamma correction signal obtained through gamma correction as gamma correction information, an unevenness correction circuit that performs an unevenness correction on the gamma correction signal based on correction data, and an output interface that externally outputs the gamma correction information, and an unevenness correction apparatus provided with a pattern generator that outputs the image signal of a predetermined image to the input interface, and a control unit that generates correction data based on gamma correction information of each individual display panel input to and read by a gamma correction information reading unit from the output interface regarding the output image signal.