Electroluminescent Display Region Segmentation for Image Uniformity
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Solution Overview
Problem
Electroluminescent display apparatuses face challenges in achieving uniform image quality across large screens and high resolutions due to variations in pixel driving characteristics and screen position, leading to deviations in time changes and driving characteristics.
Innovation Solution
The implementation of an electroluminescent display apparatus with a display panel divided into active regions, each with its own memory and timing controller, using internal and external compensation methods to correct pixel driving characteristics, including a compensation circuit to adjust threshold voltage and sensing circuits to modulate video data based on pixel characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the screen size and resolution of electroluminescent display apparatuses increase, then the display quality and image detail are improved, but the difference in time change and driving characteristic deviation of each pixel increases based on screen position
Solution Approach 1:
The display panel is divided into multiple active regions (first active region and second active region), each with its own timing controller and memory. This segmentation allows independent compensation and control of each region, reducing the driving characteristic deviation that occurs in large-screen high-resolution displays while maintaining overall image quality uniformity.
Solution Approach 2:
Each active region is equipped with dedicated timing controllers and memories that store compensation values specific to that region's characteristics. This local quality approach enables precise compensation for position-specific variations in pixel driving characteristics, addressing the uniformity issue in large screens without requiring a single complex global control system.
2Measurement precision
If compensation values are stored for each pixel region, then the accuracy of image compensation is improved, but the memory capacity and device complexity increase
Solution Approach 1:
Instead of storing compensation values for the entire display in a single large memory, the system divides the display into multiple active regions, each with its own smaller memory storing region-specific compensation values. This segmentation reduces the memory capacity requirement while maintaining high compensation accuracy for each region.
Solution Approach 2:
Each timing controller has dedicated memory storing compensation values specific to its corresponding active region. This local storage approach provides high compensation accuracy for each region while avoiding the need for a single large centralized memory, thus balancing precision and memory capacity requirements.
Data Source
AI summary
An electroluminescent display apparatus can include a display panel including a first active region configured to display first image data and a second active region configured to display second image data. The apparatus can further include a first memory configured to store a first main compensation value and a first boundary compensation value, corresponding to first pixels in the first active region, and a second memory configured to store a second main compensation value and a second boundary compensation value, corresponding to second pixels in the second active region. The apparatus can further include a first timing controller configured to correct the first image data based on the first main compensation value and the first and second boundary compensation values, and a second timing controller configured to correct the second image data based on the second main compensation value, the second boundary compensation value, and the first boundary compensation value.