E-paper Display Gate Selection Line Segmentation
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Solution Overview
Problem
Conventional e-paper display panels experience increased stray capacitance and driving voltage requirements due to the configuration of gate lines with gate selection lines, leading to higher power consumption.
Innovation Solution
The e-paper display apparatus incorporates a reduced number of gate selection lines disposed between adjacent source lines, with a driving signal having a first period for turning on the gate selection line and a second period for turning it off, allowing for extended turn-on time and reduced driving voltage, thereby minimizing stray capacitance and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gate selection lines are configured with gate lines in conventional e-paper display panels, then the pixel circuit can be controlled to display image data, but the stray capacitance of the circuit increases and the driving voltage needs to be increased to maintain the charge rate
Solution Approach 1:
The gate control function is segmented into gate lines and gate selection lines with different functions. Gate lines are used for writing data signals to pixel circuits, while gate selection lines are used for selecting and holding data. This segmentation allows optimization of each line's characteristics, reducing overall stray capacitance and power consumption while maintaining display functionality.
Solution Approach 2:
The patent changes the electrical parameters of the gate selection lines by configuring them with different capacitance characteristics compared to conventional gate lines. By adjusting the capacitance parameter and using asymmetric rise/fall time configurations, the patent reduces the driving voltage requirements and power consumption while maintaining reliable pixel circuit control.
2Reliability
If gate selection lines are configured with gate lines, then pixel circuit control is achieved, but the driving load of the driver circuit increases
Solution Approach 1:
The gate control function is segmented into gate lines and gate selection lines with different functions. Gate lines are used for writing data signals to pixel circuits, while gate selection lines are used for selecting and holding data. This segmentation allows optimization of each line's characteristics, reducing overall stray capacitance and power consumption while maintaining display functionality.
Solution Approach 2:
The patent employs dynamic control of gate selection lines with asymmetric rise and fall times. The rise time is configured to be longer than the fall time, allowing controlled charging of pixel circuit capacitors while quickly discharging when not in use. This dynamic timing control reduces the instantaneous driving load on the driver circuit while maintaining reliable pixel control.
Data Source
AI summary
An e-paper display apparatus includes an e-paper display panel including multiple source lines, multiple gate selection lines, and multiple pixel circuits and a driver circuit coupled to the e-paper display panel and configured to output a driving signal to the gate selection line. The gate selection lines and the source lines are disposed along a first direction. The source lines corresponding to the gate selection line simultaneously receive respective data signals when the gate selection line is turned on. The driving signal includes a first period and a second period. The gate selection line is turned on during the first period, and the gate selection line is turned off during the second period. A time length of the first period is greater than a time length of the second period.