Display Driving Circuits for Variable-Frequency Brightness Uniformity
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Solution Overview
Problem
Existing OLED display technologies face challenges in efficiently controlling the driving current to maintain consistent illumination across different display sub-areas, leading to uneven brightness and potential image quality issues.
Innovation Solution
A driving circuit with multiple scan circuits, including first and second scan sub-circuits, that operate at different frequencies to independently control display sub-areas, allowing for varying driving frequencies within a frame of image to optimize brightness and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single scan circuit drives all display sub-areas at the same frequency, then the circuit structure is simple and easy to control, but the brightness uniformity across different sub-areas deteriorates
Solution Approach 1:
The display area is divided into multiple display sub-areas, each driven by independent scan sub-circuits. These sub-circuits can operate at different frequencies to achieve uniform brightness across the entire display area, resolving the contradiction between simple circuit structure and brightness uniformity.
Solution Approach 2:
Different display sub-areas are assigned different driving frequencies based on their specific requirements. This local differentiation allows each sub-area to be optimized independently, achieving overall brightness uniformity while maintaining manageable circuit complexity.
2Illumination intensity
If different display sub-areas are driven at different frequencies, then the brightness uniformity is improved, but the control complexity and circuit design difficulty increase
Solution Approach 1:
The scan circuits are designed with multi-functionality, capable of operating at multiple frequencies and modes. This universality allows the same circuit architecture to serve multiple sub-areas with different frequency requirements, reducing overall control complexity while maintaining brightness uniformity.
Solution Approach 2:
The driving frequencies of different scan sub-circuits are made dynamically adjustable rather than fixed. This dynamic capability allows the system to adapt frequency settings based on display content and performance requirements, achieving brightness uniformity without excessive control complexity.
3Ease of operation
If all display sub-areas are updated at the same frame rate, then the control is simple and consistent, but the image quality and responsiveness for different regions deteriorate
Solution Approach 1:
The display area is segmented into multiple sub-areas that can be updated at different frame rates. This segmentation allows important regions to be refreshed more frequently for better image quality and responsiveness, while less critical regions use lower frame rates to maintain simple overall control.
Solution Approach 2:
The frame rate parameter is made variable across different display sub-areas rather than uniform. This parameter differentiation allows optimization of image quality for specific regions while maintaining manageable control complexity through selective application.
Data Source
AI summary
A driving circuit is provided. The driving circuit includes one or more scan circuits; wherein the one or more scan circuits comprise a first scan circuit; wherein the first scan circuit comprises a plurality of first scan sub-circuits; and at least two first scan sub-circuits of the plurality of first scan sub-circuits are configured to drive two display sub-areas of a plurality of display sub-areas of a display area with two different driving frequencies in at least one frame of image, respectively.