Display Device Temperature and Kickback Voltage Compensation
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Solution Overview
Problem
Liquid crystal display devices exhibit non-uniform gamma characteristics and display quality due to external temperature variations and kickback voltages across different areas of the display panel, leading to inconsistent image rendering.
Innovation Solution
A display device equipped with a timing controller that includes a first compensator to adjust image data based on external temperature and a second compensator to compensate for kickback voltages in different areas, ensuring uniform gamma characteristics and display quality across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid crystal display controls transmittance through electric field intensity, then image display function is achieved, but gamma characteristic becomes non-linear and display uniformity deteriorates
Solution Approach 1:
The display panel is divided into multiple temperature zones (first temperature area and second temperature area) with different temperature characteristics. Each zone receives customized compensation values to address its specific thermal behavior, enabling differentiated control that maintains gamma linearity across diverse thermal conditions.
Solution Approach 2:
The system dynamically adjusts image data parameters based on detected temperature conditions. When temperature exceeds a threshold, the system applies temperature compensation values to modify the image data, transforming the display characteristics to maintain uniform gamma response across varying thermal environments.
2Manufacturing precision
If temperature compensation is applied across the entire display panel, then gamma uniformity improves, but compensation precision deteriorates due to area-wide averaging
Solution Approach 1:
The display panel is divided into multiple temperature zones (first temperature area and second temperature area) with different temperature characteristics. Each zone receives customized compensation values to address its specific thermal behavior, enabling differentiated control that maintains gamma linearity across diverse thermal conditions.
Solution Approach 2:
Different compensation strategies are applied to different spatial regions of the display panel. The first temperature area receives different compensation values than the second temperature area, allowing each region to be optimized for its specific thermal characteristics rather than applying a uniform approach.
3Reliability
If kickback voltage compensation is applied to all areas, then display quality improves, but device complexity increases due to multiple compensation mechanisms
Solution Approach 1:
The system combines temperature compensation and kickback voltage compensation into a unified image processing pipeline. Both compensation mechanisms operate sequentially on the image data, integrating multiple correction functions into a single coordinated system that manages complexity through structured integration.
Solution Approach 2:
The system applies kickback voltage compensation values in advance to image data before display. By pre-compensating for anticipated kickback effects based on stored compensation values, the system eliminates the need for real-time complex calculations during display operation.
Data Source
AI summary
A display device includes a timing controller, a data driver, and a display panel. The timing controller includes a first compensator receiving a first image data, selecting a temperature compensation value in accordance with the external temperature, and converting the first image data to a second image data on the basis of the selected temperature compensation value and a second compensator selecting a kickback voltage compensation value predetermined in accordance with the areas of the display panel and converting the second image data to the output image data on the basis of the kickback voltage compensation value selected in accordance with the areas.