Display Panel Pixel Circuits for Independent Area Refresh Rates
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Solution Overview
Problem
Current display devices cannot 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
A display panel design that includes a pixel circuit with a driving transistor, a preset module, and a gating module, where the gating module is connected in various configurations to optimize the pulse change frequency of the gating signal independently of the control signal, allowing for varying refresh frequencies across 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 is simple and control is easy, but the display effect is not optimal for different display areas with different content requirements
Solution Approach 1:
The display area is divided into multiple independent display areas, each capable of operating at different refresh frequencies. The pixel circuit is segmented into multiple switching transistors (first switching transistor, second switching transistor, third switching transistor) that can be independently controlled by different control signals (first control signal, second control signal), enabling each display area to have customized refresh frequency based on its content requirements.
Solution Approach 2:
The refresh frequency of each display area is made dynamically adjustable through the gating module and multiple control signals. The third switching transistor can be controlled to operate at different frequencies independently of other display areas, allowing the system to adapt dynamically to different display content requirements without fixing the entire display at a single frequency.
2Adaptability or versatility
If different refresh frequencies are applied to different display areas, then optimal display effect is achieved, but the control signal complexity increases
Solution Approach 1:
A gating module is introduced as an intermediary component that receives a gating signal and controls the operation of the third switching transistor. This gating module acts as a mediator between the control system and the pixel circuit, enabling frequency differentiation without requiring complete redesign of the control architecture. The gating module selectively enables or disables the third switching transistor based on the gating signal, thereby controlling whether a display area operates at a different refresh frequency.
3Adaptability or versatility
If the control signal frequency is changed to adjust refresh frequency, then display performance is optimized, but it affects the entire display area and cannot achieve independent adjustment
Solution Approach 1:
The control signal path is segmented into multiple independent channels. Each display area has its own control signal (first control signal, second control signal) that can be transmitted independently through separate signal lines to the corresponding switching transistors. This segmentation of the control signal transmission path allows each display area to receive customized control signals with different frequencies, enabling independent frequency adjustment without affecting other display areas.
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, 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 gating module is connected to a gating signal line, and the gating signal line is configured to receive a gating signal. In at least a portion of an operation process of the display panel, a pulse change frequency of the gating signal is F, and a pulse change frequency of the control signal is Fc, and F≠Fc.