Emission Selection Gate Driver for Low-Frequency Pulse Masking
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Solution Overview
Problem
Existing display devices face issues with power consumption and masking operations malfunctioning when reducing the driving frequency, particularly in mobile devices like smartphones and tablets, leading to incomplete masking of pulses during low-frequency operation.
Innovation Solution
An emission selection driver and gate driver system that generates emission and selection signals based on the voltage of emission control nodes, inverted emission control nodes, and enable signals, ensuring synchronized pulse lengths and timings to prevent erroneous masking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the driving frequency of the display panel is reduced to lower power consumption, then power consumption is reduced, but masking operations malfunction and pulses are not completely masked
Solution Approach 1:
The patent implements dynamic frequency adjustment by enabling the display panel to operate at different driving frequencies based on content requirements. The system can switch between high frequency (for moving images requiring accurate masking) and low frequency (for still images where power savings are prioritized), making the masking operation adaptive to different operational conditions rather than fixed at a single frequency.
Solution Approach 2:
The patent changes the timing parameters of the global scan signal and emission signal to ensure proper synchronization at different driving frequencies. By adjusting the pulse widths and timing relationships between signals, the system maintains reliable masking operations across varying frequency conditions, resolving the contradiction between power consumption and masking reliability.
2Use of energy by stationary object
If a global scan signal is used to mask signals in low-frequency operation, then power consumption is reduced, but only part of the pulses are masked causing masking malfunction
Solution Approach 1:
The patent employs feedback mechanisms where the emission driver monitors the timing and synchronization between the global scan signal and emission signal. Based on this feedback, the system adjusts signal parameters to ensure complete masking of pulses that should be suppressed, preventing partial masking failures that occur in low-frequency operations with conventional approaches.
Solution Approach 2:
The system performs preliminary synchronization checks and signal parameter adjustments before initiating the masking operation. By pre-configuring the timing relationships between global scan signals and emission signals, the system ensures that complete masking is achieved before low-frequency operation begins, preventing masking incompleteness issues.
Data Source
AI summary
An emission selection driver includes an emission driver configured to output an emission signal in response to a voltage of an emission control node and a voltage of an inverted emission control node and a selection driver configured to output a selection signal based on the voltage of the emission control node, the voltage of the inverted emission control node, and an enable signal.