AMOLED Driving Circuit Potential Saving Unit Power Reduction
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Solution Overview
Problem
AMOLED display screens face high power consumption when displaying an all-white picture due to the complexity of data voltage pulses required for gate voltage scanning, which complicates the driving circuit and increases overall power consumption.
Innovation Solution
A driving circuit with potential saving units and pixel driving units that supply high and low voltage signals to each pixel unit based on control signals, eliminating the need for complex data voltage pulses by using transistors and shifting registers to control light emitting diodes directly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If data voltage pulses are input constantly to keep displaying the same picture, then the picture can be maintained, but the power consumption of the driving circuit and display screen increases
Solution Approach 1:
The patent applies preliminary action by pre-charging capacitors in each pixel unit before the display period. The capacitor stores the voltage signal needed to maintain the picture, eliminating the need for continuous data voltage pulse input. This allows the picture to be maintained using stored energy rather than continuous external energy input, thereby reducing power consumption while maintaining display stability.
2Stability of the object's composition
If data voltage pulses are input constantly to keep displaying the same picture, then the picture can be maintained, but the complexity of the data voltage pulse increases
Solution Approach 1:
The patent simplifies the data voltage pulse structure by using preliminary action - capacitors are pre-charged with the required voltage during a setup phase, and then simply maintained during the display phase. This transforms a complex continuous pulse signal into a simple hold operation, reducing the complexity of data voltage pulse generation and control while maintaining stable picture display.
3Duration of action of stationary object
If the same picture is kept displaying by inputting data voltage pulses constantly, then the picture display is maintained, but the overall power consumption of the display screen increases
Solution Approach 1:
The patent implements preliminary action by charging capacitors in advance during a precharge phase, storing the energy needed for picture maintenance. During the subsequent display period, the stored charge in capacitors maintains the picture without requiring continuous energy input from the power supply, thereby extending the duration of picture display while reducing the overall power consumption of the display screen.
Data Source
AI summary
The present disclosure relates to a driving circuit of a display panel, a display panel and a display device. The driving circuit includes at least one potential saving unit and at least one column of pixel driving units. The potential saving unit is arranged corresponding to a column of pixel units, and is configured to output a first potential signal based on a voltage of the external preset power supply and save the first potential signal to the first potential output terminal, while outputting a second potential signal and saving the second potential signal to the second potential output terminal.