Organic Light-Emitting Display Device Crosstalk Prevention
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Solution Overview
Problem
High-resolution organic light-emitting display devices operating at high speeds experience crosstalk among scan lines due to reduced horizontal and scan-on times, leading to deteriorated image quality.
Innovation Solution
The device divides a frame into odd-numbered and even-numbered sub-frames, with specific drivers managing scan and emission signals to ensure sufficient horizontal time, allowing for concurrent data writing and light emission operations, thereby preventing crosstalk and enhancing image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of scan lines is increased to enhance resolution, then image quality is improved, but horizontal time and scan on time decrease causing crosstalk among scan lines
Solution Approach 1:
The scan driver is divided into multiple independent scan drivers, each responsible for controlling a specific group of scan lines. This segmentation allows each scan driver to operate independently with optimized timing, preventing crosstalk between adjacent scan lines while maintaining high resolution display.
2Productivity
If the driving frequency is increased to operate at higher speed, then productivity is improved, but horizontal time and scan on time become insufficient leading to crosstalk
Solution Approach 1:
By segmenting the scan control into multiple independent scan drivers, each operating at the high driving frequency, the system maintains sufficient scan on time for each group of scan lines. This enables high-speed operation without crosstalk by distributing the scanning workload across multiple drivers with optimized timing sequences.
Solution Approach 2:
Multiple scan drivers operate in periodic sequences, with each driver controlling its assigned scan lines during specific time intervals within the frame period. This periodic action ensures that each scan line group receives adequate scan on time even at high driving frequencies, preventing crosstalk while maintaining high productivity.
3Reliability
If the scan on time is extended to prevent crosstalk, then reliability is improved, but the time available for other operations decreases
Solution Approach 1:
By dividing scan line control among multiple independent scan drivers, each driver manages a subset of scan lines with optimized scan on time. This segmentation allows the total scan on time to be distributed efficiently, ensuring sufficient time for each group without excessive total time loss, while maintaining reliable crosstalk prevention.
Data Source
AI summary
An organic light-emitting display device includes: a data driver configured to divide one frame into an odd-numbered sub-frame and an even-numbered sub-frame, to divide frame data for implementing the one frame into odd-numbered sub-frame data and even-numbered sub-frame data, to provide the odd-numbered sub-frame data to the data lines in the odd-numbered sub-frame, and to provide the even-numbered sub-frame data to the data lines in the even-numbered sub-frame; an odd-numbered scan driver electrically connected to odd-numbered scan lines to provide an odd-numbered scan signal to the odd-numbered scan lines in the odd-numbered sub-frame; an even-numbered scan driver electrically connected to even-numbered scan lines to provide an even-numbered scan signal to the even-numbered scan lines in the even-numbered sub-frame; an emission driver to provide an emission signal to emission line groups formed by grouping the emission lines by two adjacent emission lines in the odd-numbered sub-frame and the even-numbered sub-frame.