Pixel Driving Method for AMOLED Data Lines
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Solution Overview
Problem
The increasing resolution of Active-matrix Organic Light Emitting Diode (AMOLED) panels faces challenges in reducing the number of data voltage output terminals, leading to high alternating current loads during pixel driving, which affects efficiency and power consumption.
Innovation Solution
A pixel driving method is introduced that utilizes multiplexers with two driving branches to reduce alternating current load by controlling the switching elements to turn on and off only once during each data writing cycle, with specific phases for pre-charging, first data writing, and second data writing, using thin film transistors as switching elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiplexing technology is introduced to reduce the number of data voltage output terminals, then the number of output terminals is reduced, but the alternating current load during pixel driving increases
Solution Approach 1:
The data writing process is segmented into distinct phases: pre-charging phase, first data writing phase, and second data writing phase. Each phase has specific switching operations to control the multiplexer driving branches, reducing unnecessary switching and thereby reducing alternating current load while maintaining multiplexing benefits
Solution Approach 2:
A pre-charging phase is performed before actual data writing to charge the data lines to a preset voltage level. This preliminary action ensures that the data lines are ready for data writing, reducing the need for repeated charging operations and lowering the alternating current load during normal operation
Data Source
AI summary
The present application discloses a pixel driving method, comprising: in a pre-charging phase, turning on a second driving branch to write a preset voltage into a second data line, and then turning off the second driving branch and turning on a first driving branch to write the preset voltage into a first data line; in a first data writing phase, keeping the first driving branch to be turned on to write a first data voltage into the first data line, and then turning off the first driving branch; and in a second data writing phase, turning on the second driving branch to write a second data voltage into the second data line.