Display Panel Pixel Circuits with Frequency-Specific Reset Signals
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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.
Innovation Solution
The display panel incorporates a pixel circuit with multiple refresh modes allowing different refresh frequencies, each corresponding to distinct reset signals, thereby adapting the node voltage reset to the current refresh frequency.
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 single-reset-signal approach to a dynamic multi-signal approach where the reset signal is selected according to the current refresh mode (high or low frequency), allowing the system to adapt its behavior to different operating conditions and eliminate flickering issues at low refresh frequencies
Solution Approach 2:
The patent changes the parameter of reset signal selection based on refresh frequency. By introducing different reset signals for high refresh frequency mode and low refresh frequency mode, the system modifies the reset signal parameter to match the operating conditions, thereby improving display quality without significantly increasing overall system complexity
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 pixel circuit is designed with multi-functionality to handle multiple refresh modes. The same pixel circuit structure can operate in both high refresh frequency mode and low refresh frequency mode by selecting appropriate reset signals, eliminating the need for separate dedicated circuits for each mode and thus limiting the increase in device complexity
Solution Approach 2:
The system dynamically selects between different reset signals based on the current refresh mode rather than requiring separate fixed circuits. This dynamic selection approach allows a single pixel circuit design to serve multiple functions across different operating conditions, minimizing the impact on device complexity while maintaining high display 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.