Display Panel Pixel Gating for Region-Specific Refresh Rates
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Solution Overview
Problem
Current display devices fail to achieve optimal display effects due to a uniform screen refresh frequency across different display areas, despite varying optimal refresh frequencies required for different display contents.
Innovation Solution
The display panel incorporates a gating module to optimize the operating frequency of pixel circuits, allowing for varying screen refresh frequencies without altering the pulse change frequency of the control signal, thereby enabling independent adjustment of refresh rates in different display areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a uniform screen refresh frequency is applied across the entire display area, then the device structure remains simple and control is easy, but optimal display effect cannot be achieved in different display areas with different content requirements
Solution Approach 1:
The display area is divided into multiple independent display regions, each capable of operating at different refresh frequencies. The pixel circuit is segmented into functional modules (preset module, gating module, driving transistor) that can be independently controlled. This allows different display areas to be updated at different rates based on content requirements, achieving optimal display effect for each region without requiring complete system redesign.
Solution Approach 2:
The refresh frequency of different display areas is made dynamically adjustable rather than fixed uniformly. The gating module enables dynamic selection of refresh frequencies (e.g., 60Hz or 120Hz) for different display regions based on real-time content requirements. This dynamic adaptation allows the system to optimize display performance for each area while maintaining overall system simplicity.
2Adaptability or versatility
If different display areas operate at different refresh frequencies, then optimal display performance is achieved for each area, but the control signal complexity increases
Solution Approach 1:
A gating module is introduced as an intermediary component between the control signal line and the pixel circuit. This gating module receives a single control signal and selectively gates it to different display areas based on their required refresh frequencies. The intermediary handles the complexity of differential frequency control internally, allowing the external control system to maintain simplicity while achieving sophisticated per-area frequency management.
Solution Approach 2:
The pixel circuit incorporates self-service mechanisms where the preset module automatically adjusts operating parameters based on the gating signal state. When the gating module enables or disables signal transmission, the preset module autonomously configures the driving transistor and other circuit elements accordingly, eliminating the need for complex external control logic and reducing the operational burden on the control system.
3Adaptability or versatility
If the pulse change frequency of the control signal is increased to support variable refresh rates, then different display areas can achieve different refresh frequencies, but the base control signal frequency must change which affects overall system operation
Solution Approach 1:
The system employs periodic gating signals with different duty cycles and frequencies to control different display areas. Instead of changing the base control signal frequency, periodic gating actions are superimposed on the stable control signal. The gating module applies periodic enable/disable cycles at different frequencies for different display regions, allowing variable refresh rates to be achieved through periodic modulation rather than fundamental frequency changes, thus maintaining control signal stability.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a pixel circuit including a driving transistor and a preset module, a light-emitting element, a driving circuit, and a gating module. A first terminal of the preset module is connected to the driving transistor, a second terminal of the preset module is connected to a preset signal terminal or the driving transistor, a control terminal of the preset module is connected to a control signal line, and the control signal line is configured to receive a control signal. The driving circuit is configured to provide the control signal for the control signal line. The gating module is connected between the control terminal of the preset module and the driving circuit. The gating module is connected to a gating signal line, and the gating signal line is configured to receive a gating signal.