OLED Display Panel Pixel Circuit Frequency Reduction
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Solution Overview
Problem
High-frequency refresh of OLED display panels leads to increased life loss of transistors in pixel circuits, as the operating frequency of these circuits must match the refresh frequency, resulting in reduced performance and lifespan.
Innovation Solution
Implementing a configuration where multiple pixel circuits are connected to each light-emitting element, allowing them to operate at different phases of the display panel, thereby reducing the operating frequency of each pixel circuit while maintaining high refresh frequency, such as by having two pixel circuits alternately drive the light-emitting element during odd and even frame periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the pixel circuit operates at high frequency to match the refresh frequency of the display panel, then the display refresh rate is improved, but the lifespan of the transistor is reduced
Solution Approach 1:
The patent divides the pixel circuit into multiple independent pixel circuits (first pixel circuit and second pixel circuit) that share a common light-emitting element. Each pixel circuit operates at a lower frequency, alternating to drive the light-emitting element, thereby segmenting the high-frequency operation burden and reducing individual transistor wear while maintaining high display refresh rate.
2Reliability
If the pixel circuit operates at high frequency to match the refresh frequency, then the display performance is improved, but the operating frequency of the pixel circuit increases causing greater life loss
Solution Approach 1:
The patent merges multiple pixel circuits to share a single light-emitting element, allowing them to operate at lower frequencies in an alternating manner. This combination approach maintains high display performance through coordinated operation while reducing the operating frequency burden on each individual pixel circuit, thereby extending transistor lifespan.
3Duration of action of stationary object
If multiple pixel circuits are used to drive light-emitting elements at different phases, then the operating frequency of each pixel circuit is reduced, but the device structure becomes more complex
Solution Approach 1:
The patent designs multiple pixel circuits with identical structures and functions, where each pixel circuit can independently drive the light-emitting element. This multi-functionality allows the system to achieve lower operating frequencies per circuit while maintaining structural uniformity, reducing the complexity impact through standardized design patterns.
Data Source
AI summary
A display panel, a method for driving the same, and a display apparatus are provided. The display panel includes a plurality of light-emitting elements. Each one of the light-emitting element is electrically connected to M pixel circuits, where M is a positive integer greater than or equal to 2. The M pixel circuits are configured to drive the light-emitting element to emit light respectively during different display phases of the display panel.