Frame Scanning Pixel Display Driving Unit Power Optimization
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Solution Overview
Problem
Current frame scanning control methods for LCDs have high power consumption and inefficient light-emitting due to TFTs being turned off during signal writing, resulting in limited light-emitting time and increased power usage.
Innovation Solution
A frame scanning pixel display driving unit with a driving transistor, data writing module, and driving control module that allows for efficient signal writing and light-emitting by using multiple sub-modules to manage the connection and disconnection of the driving transistor with the light-emitting element, enabling increased light-emitting time and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If frame scanning control method is used in LCD, then power consumption is reduced, but light-emitting time is limited and display effect is negatively affected
Solution Approach 1:
The patent applies preliminary action by pre-charging the capacitor during the signal writing phase before the light-emitting phase begins. The driving transistor is turned on during signal writing to charge the capacitor, so that when the light-emitting phase starts, the capacitor is already charged and ready to drive the light-emitting element, eliminating the need to wait for signal writing to complete before charging.
Solution Approach 2:
The patent implements dynamics by dynamically controlling the state of the driving transistor and capacitor across different phases. During the signal writing phase, the driving transistor is turned on and the capacitor is charged; during the light-emitting phase, the driving transistor remains on and the capacitor drives the light-emitting element. This dynamic state management allows overlapping of signal writing and capacitor charging processes.
2Use of energy by stationary object
If TFTs are turned off during signal writing, then power consumption is reduced, but signal writing efficiency decreases and light-emitting time is limited
Solution Approach 1:
The patent applies continuity of useful action by maintaining the driving transistor in the on-state continuously across both the signal writing phase and the light-emitting phase. This eliminates the idle period where the transistor would be turned off, allowing signal writing and capacitor charging to occur simultaneously without interruption, thereby improving signal writing efficiency while maintaining low power consumption through frame scanning.
3Reliability
If most time is spent on signal writing phase, then display refresh is completed, but actual light-emitting time is reduced
Solution Approach 1:
The patent applies preliminary action by completing the capacitor charging process during the signal writing phase itself, rather than waiting for signal writing to finish. The capacitor is charged in advance during signal writing, so that when the light-emitting phase begins, the charging process is already complete or nearly complete, maximizing the available light-emitting time.
Solution Approach 2:
The patent implements continuity of useful action by ensuring that the capacitor charging process continues uninterrupted during both the signal writing phase and the light-emitting phase. The driving transistor remains on throughout, allowing the capacitor to charge during signal writing and then immediately drive the light-emitting element, eliminating idle time and maximizing the utilization of the frame period.
Data Source
AI summary
The present disclosure provides a frame scanning pixel display driving unit and a driving method thereof, and a display apparatus. The frame scanning pixel display driving unit includes: a driving control module for receiving a first frame data signal, and controlling the driving transistor to drive the pixel to display based on the first frame data signal; a data writing module for receiving and latch the second frame data signal when the driving transistor drives the pixel to display based on the first frame data signal, and transmitting the second frame data signal to the driving control module after the displaying of the first frame data signal is completed. The present disclosure enables a frame scanning display mode, and can reduce the power consumption during the signal writing phase and effectively reduce the power consumption of the panel display.