Variable-Refresh Display Panels with Adaptive Pixel Reset
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Solution Overview
Problem
Conventional display panels experience flickering and unevenness due to the use of the same reset signal for different refresh frequencies, particularly at low refresh frequencies, which affects the display quality and power consumption.
Innovation Solution
Implementing a pixel circuit with multiple refresh modes allowing different refresh frequencies and corresponding reset signals to adaptively reset node voltages, thereby improving display stability and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same reset signal is used for different refresh frequencies, then the device complexity is reduced, but the display quality deteriorates due to flickering and unevenness
Solution Approach 1:
The patent implements dynamic adaptation of reset signals based on refresh frequency. The system transitions from a static, fixed reset signal configuration to a dynamic configuration where reset signals are automatically adjusted according to the operating refresh frequency, thereby maintaining display quality across different refresh rates without manual intervention
Solution Approach 2:
The patent changes the parameter of reset signal timing and characteristics to match different refresh frequencies. By adjusting the reset signal parameters (such as timing relative to data input and frame rate) to correspond with the current refresh frequency, the system eliminates flickering and unevenness while maintaining simplicity in the overall device architecture
2Reliability
If multiple refresh modes with different reset signals are implemented, then the display quality is improved, but the device complexity increases
Solution Approach 1:
The patent implements a universal refresh mechanism that handles multiple refresh frequencies through a single integrated system. Rather than requiring separate dedicated circuits for each refresh mode, the system uses a universal approach where the same pixel circuit structure supports multiple refresh rates by dynamically adjusting reset signal parameters, thereby reducing overall device complexity
Solution Approach 2:
The system performs self-adjustment of reset signals based on the current refresh frequency without external intervention. The refresh control mechanism automatically identifies the operating refresh rate and configures the appropriate reset signal timing, eliminating the need for complex manual configuration or external control circuits for each refresh mode
3Use of energy by moving object
If refresh frequency is reduced to save power, then the power consumption is reduced, but the display quality deteriorates due to flickering
Solution Approach 1:
The patent adjusts the reset signal timing parameter to compensate for lower refresh frequencies. By modifying the reset signal characteristics to match the reduced refresh rate, the system maintains display quality and eliminates flickering even at lower power-consuming refresh frequencies, enabling energy-efficient operation without sacrificing visual quality
Data Source
AI summary
A display panel and an electronic device including the display panel. The display panel includes a pixel circuit including a plurality of refresh modes, and at least two of the plurality of refresh modes make the pixel circuit to be at different refresh frequencies. Different reset signals correspond to different reset signals.