OLED Display Emission Control Pattern Adaptation
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Solution Overview
Problem
Conventional organic light emitting displays face increased manufacturing costs and reduced aperture ratio due to the need for individual drivers for each sub-pixel, leading to a color division phenomenon and deteriorated picture quality when using a mosaic pattern for driving two OLEDs in alternating fields.
Innovation Solution
An organic light emitting display with pixel circuits at crossing regions of scan and data lines, including pattern detection and emission control line drivers that adjust the supply order of emission control signals to control sub-pixels in a stripe pattern when a specific pattern is detected, ensuring all red, green, and blue sub-pixels emit light in both fields, thereby preventing color division.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If one driver drives two OLEDs in alternating fields using mosaic pattern, then manufacturing cost is reduced and aperture ratio is improved, but color division phenomenon occurs and picture quality deteriorates
Solution Approach 1:
The patent applies dynamics by making the emission control pattern adaptive rather than fixed. The system dynamically switches between mosaic pattern and stripe pattern based on the detected image content. When a specific pattern (e.g., text or uniform regions) is detected, the system transitions to stripe pattern to prevent color division, while using mosaic pattern for other content to maintain cost efficiency and aperture ratio.
Solution Approach 2:
The patent changes the emission control parameter (pattern type) based on image content detection. By detecting specific patterns in the image data, the system adjusts the emission control signal pattern from mosaic to stripe or vice versa, thereby optimizing picture quality for specific content while maintaining overall system efficiency.
2Object-affected harmful factors
If sub pixels are controlled in mosaic pattern to reduce vertical stripes, then vertical stripe artifact is reduced, but color division phenomenon is generated in specific patterns
Solution Approach 1:
The patent implements feedback by using a pattern detecting unit to analyze the image content and provide feedback to the emission control system. Based on this feedback, the system automatically adjusts the emission control pattern to prevent both vertical stripes and color division phenomena, achieving adaptive optimization.
Solution Approach 2:
The system changes the emission control parameter (pattern type) based on detected image characteristics. When specific patterns are detected that are prone to color division, the system switches from mosaic pattern to stripe pattern, thereby eliminating color division while maintaining the benefits of mosaic driving for other content.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves picture quality by eliminating the color division phenomenon and reducing manufacturing costs by allowing a single driver to control two OLEDs, maintaining high brightness and color accuracy.
Implementation Method 1
The organic light emitting display displays images using organic light emitting diodes (OLED) that generate light by the re-combination of electrons and holes
Data Source
AI summary
An organic light emitting display includes pixel circuits at crossing regions of scan lines, data lines, first emission control lines, and second emission control lines, a pattern detecting unit for detecting a specific pattern of an image to be displayed, an emission control line driver for supplying a first emission control signal to the first emission control lines, and for supplying a second emission control signal to the second emission control lines, and a timing controller for controlling the emission control line driver so that a supply order of the first and second emission control signals corresponds to whether the specific pattern is detected.