Pixel Circuit Control for Mixed Refresh Rate Display Areas
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Solution Overview
Problem
Existing display devices struggle to efficiently manage different refresh frequencies in specific scenarios, such as QR code display and split-screen display, where areas require varying refresh rates, leading to increased power consumption and inefficiency.
Innovation Solution
A pixel circuit with a data-writing control circuit that allows for controlling the connection or disconnection of data lines and scanning terminals, enabling independent refresh frequency adjustment in different display areas by allowing certain areas to maintain high refresh frequencies while others can remain unchanged during a frame or multiple frames, effectively reducing refresh frequency where needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different refresh frequencies are supported in different display areas, then display adaptability is improved, but device complexity increases
Solution Approach 1:
The display area is divided into multiple independent display regions, each with its own pixel circuit and control circuit. This segmentation allows different refresh frequencies to be applied to different areas independently, achieving adaptive display without requiring the entire display to operate at high refresh rates, thus managing complexity through modular design.
Solution Approach 2:
Different display areas are assigned different refresh frequencies based on their specific requirements. For example, areas requiring high refresh rates (like moving images) receive high refresh rates while areas displaying static content receive lower refresh rates. This local differentiation optimizes power consumption while maintaining display adaptability.
2Reliability
If high refresh frequencies are used, then display quality is improved, but power consumption increases
Solution Approach 1:
Instead of applying high refresh rates to the entire display, the system applies high refresh rates only to the necessary portions of the display where high display quality is required. Static or slowly changing content areas operate at lower refresh rates, reducing overall power consumption while maintaining display quality where needed.
Solution Approach 2:
The refresh frequency parameter is dynamically adjusted based on display content and requirements. The control circuit modifies the refresh frequency parameter for different pixel circuits based on whether the displayed content is static, moving, or changing, thereby optimizing the balance between display quality and power consumption.
Data Source
AI summary
A pixel circuit, a display substrate, a display device and a display driving method are provided. The pixel circuit includes a driving circuit, a data-writing circuit, a data-writing control circuit and a light-emitting element; the data-writing circuit controls the connection or disconnection between the data line and the first end of the driving circuit under the control of a control signal; the data-writing control circuit is configured to control the control signal to control whether the data-writing circuit writes the data voltage to the first end of the driving circuit under the control of the control signal. The present disclosure can realize the display of images at different refresh frequencies in different display areas.