Micro-LED Voltage Stabilizing Circuit for Flicker-Free Power Transitions
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Solution Overview
Problem
In micro-LED display panels, the driving voltage Vdd exhibits different climbing speeds at the near and far ends, leading to inconsistent performance and screen flickering during startup and shutdown due to unstable voltage changes.
Innovation Solution
A voltage stabilizing circuit comprising a light emitting module, a driving module, a comparison module, a selection module, a first switch module, and a second switch module, which sets a reference voltage as a judgment threshold to control the on-off timing of micro-LEDs, ensuring stable voltage conditions for consistent performance and incorporating overvoltage protection to prevent screen flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the display panel uses a simple driving circuit without voltage stabilization, then the device complexity is reduced, but the driving voltage becomes unstable causing screen flickering during startup and shutdown
Solution Approach 1:
The patent implements a feedback mechanism where the driving voltage Vdd is continuously monitored and compared against a reference voltage. When voltage instability is detected (Vdd < Vref during startup or Vdd > Vref during shutdown), the circuit automatically adjusts by controlling switch modules to stabilize the voltage, ensuring reliable operation without excessive complexity
Solution Approach 2:
The patent introduces intermediate control components including a comparison module that compares Vdd with reference voltage, and switch modules (first and second switch modules) that act as intermediaries to adjust the driving voltage. These intermediary elements mediate between the power supply and the light emitting module to prevent flickering while maintaining circuit simplicity
2Speed
If the driving voltage climbs quickly at the near end of the display panel, then the startup speed is improved, but the far end experiences inconsistent performance causing screen flickering
Solution Approach 1:
The patent applies local quality control by implementing voltage stabilization at each pixel level through individual switch modules connected to light emitting modules. The comparison module locally compares the driving voltage with reference voltage at each position, allowing different parts of the display panel to be controlled according to their specific voltage conditions, ensuring consistent performance across the entire panel
Data Source
AI summary
Disclosed are a voltage stabilizing circuit and a display panel. A voltage stabilizing circuit includes a light emitting module, a driving module, a comparison module, a selection module, a first switch module and a second switch module. Since the delay of on-off of each LED in the display panel is difficult to be detected by the eyes, the present application combines the above modules, can change the on-off timing of the LED in the entire display panel by setting the reference voltage as the judgment threshold of the driving voltage, to provide more ample time for the driving voltage of the remote end to climb or fall, to turn the LED on and light it up until the driving voltage meets the conditions.