OLED Display Noise Reduction via Staggered Horizontal Block Emission
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Solution Overview
Problem
Concurrent emission methods in organic light emitting displays result in increased emission noise due to rapid changes in current, affecting the displayed image and peripheral apparatus.
Innovation Solution
Divide the display panel into horizontal blocks and control the emission start times of pixels within these blocks, using emission control signals to manage the emission of pixels, ensuring that each block emits light at different times and turns off at distinct points, thereby minimizing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If concurrent emission method is used to simplify pixel structure and enable 3D display, then device complexity is reduced and adaptability is improved, but emission noise increases due to rapid current changes
Solution Approach 1:
The patent divides the display panel into multiple horizontal blocks (first horizontal block, second horizontal block, etc.) and controls each block to emit light at different time periods. This segmentation approach maintains the concurrent emission method's structural simplicity while reducing emission noise by distributing the current load across multiple time slots, preventing rapid simultaneous current changes across the entire panel.
2Reliability
If all pixels emit light simultaneously in concurrent emission method, then threshold voltage compensation is achieved and structure is simplified, but large amounts of noise are emitted from power source lines affecting image quality
Solution Approach 1:
The patent implements periodic emission control by dividing the emission period into multiple time slots, with each horizontal block emitting light during its designated time period. This periodic action maintains the benefits of concurrent emission (threshold voltage compensation) while reducing noise impact on the image by staggering the emission timing across different blocks, preventing simultaneous current surges from all pixels.
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 reduces emission noise by managing the current flow as a step-wave, ensuring a stable image and minimizing interference with peripheral devices.
Implementation Method 1
Organic light emitting displays use organic light emitting diodes (OLEDs) to generate light by a recombination of electrons and holes
Data Source
AI summary
There is provided an organic light emitting display capable of minimizing noise. A method of driving the organic light emitting display includes setting pixels included in horizontal blocks into a non-emission state, the pixels charging voltages corresponding data signals, the pixels starting to emit light at different times in units of the horizontal blocks, and emitting light from the pixels according to the charging voltages.