Display Panel Emission Driving Circuit Flicker Control
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Solution Overview
Problem
Display panels experience flicker issues during startup and shutdown, affecting display quality.
Innovation Solution
A display panel with an emission driving circuit featuring cascaded emission driving units, including a control module with a control transistor that adjusts the operating state of the output module to prevent signal output to the pixel driving circuit, thereby avoiding flicker by turning off the output module during startup and shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the emission driving unit outputs signal during startup and shutdown, then the display panel can be operated, but flicker occurs affecting display quality
Solution Approach 1:
The control module is configured to turn off the output module before the emission driving unit outputs signal during startup and shutdown phases. This preliminary action prevents the harmful flicker effect from occurring in the first place during critical transition periods, while allowing normal operation when needed
Solution Approach 2:
The control module dynamically adjusts the operating state of the output module based on the operational phase of the display panel. During startup and shutdown, the output module is turned off to prevent flicker, while during normal operation it is activated to enable signal output, creating a dynamic adaptation to different operational conditions
2Ease of operation
If the control transistor maintains large voltage difference for long duration, then the output module can be effectively controlled, but the stability of the control transistor deteriorates
Solution Approach 1:
The control transistor operates in periodic cycles, maintaining large voltage difference only during necessary control periods and returning to smaller voltage states during other phases. This periodic modulation ensures effective control when needed while preventing continuous stress that would degrade transistor stability
Solution Approach 2:
The voltage difference across the control transistor is dynamically adjusted based on operational requirements. The control module modifies the voltage parameters to maintain large voltage difference only when control action is necessary, and reduces voltage difference during idle or steady-state periods, thereby balancing control effectiveness with component stability
Data Source
AI summary
A display panel, a method for driving the same, and a display apparatus are provided. The display panel includes an emission driving circuit that includes cascaded emission driving units. The emission driving unit includes a control module including a control transistor. The control transistor provides a signal of an adjustment signal terminal to a first node in response to a signal of a first control signal terminal, so as to turn off a first output module. A voltage difference between any two of a control electrode, a first electrode or a second electrode of the control transistor is smaller than or equal to a preset threshold, and/or a duration in which a voltage difference between any two of the control electrode, the first electrode or the second electrode of the control transistor is greater than the preset threshold is smaller than or equal to a preset duration.