OLED Output Control Device for Flicker Reduction
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Solution Overview
Problem
In OLED technology, low-frequency driving leads to display flickers due to synchronized data writing and anode resetting frequencies, causing black frame insertion that affects user experience.
Innovation Solution
An output control device and circuit that provide distinct control signals for data writing and light emitting element resetting, with the resetting signal frequency being higher than the writing signal frequency, allowing for independent control of light emission and resetting phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the data writing frequency and anode resetting frequency are synchronized at low driving frequencies, then the pixel circuit operation is simplified, but display flickers occur due to black frame insertion being easily recognized by human eyes
Solution Approach 1:
The patent segments the control signals into separate channels: a first control signal for data writing and a second control signal for anode resetting. This allows independent frequency control of each function, enabling the anode resetting to occur at a higher frequency than data writing, thereby eliminating visible black frames while maintaining simplified pixel circuit operation.
Solution Approach 2:
The patent introduces dynamic frequency differentiation where the second control signal (anode resetting) operates at a higher frequency than the first control signal (data writing). This dynamic frequency separation allows the system to adapt to low driving frequency conditions by maintaining a higher resetting frequency, preventing display flickers while keeping the overall system manageable.
2Object-affected harmful factors
If the anode resetting frequency is increased to reduce black frame visibility, then display flickers are reduced, but the control signal complexity increases
Solution Approach 1:
The patent divides the control signal generation into separate functional blocks: a first output device for data writing control and a second output device for anode resetting control. This segmentation allows each block to operate at its optimal frequency independently, reducing the overall control complexity while achieving the desired frequency differentiation to eliminate display flickers.
Solution Approach 2:
The patent designs the output control device to provide multiple control signals with different frequencies from a unified control structure. The first and second output devices work together within a single control system to generate both data writing and anode resetting signals, allowing the system to maintain universality while achieving frequency differentiation for flicker reduction.
Data Source
AI summary
Provided is an output control device for providing control signals for a pixel circuit, which includes: a first output device configured to output a first control signal for controlling writing of a data signal into the pixel circuit, and a third output device configured to output a third control signal for controlling resetting of the light emitting element. A frequency of the third control signal is higher than a frequency of the first control signal.