AMOLED Driving Circuit Segmentation for Data Transmission
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Solution Overview
Problem
Existing methods for driving active-matrix organic light emitting diode (AMOLED) displays require high transmission speeds for driver ICs and storage access speeds, which restrict data transmission efficiency.
Innovation Solution
The method involves representing grayscale values in binary format and dividing them into N portions to generate Pulse Width Modulation (PWM) driving signals, which are transmitted during corresponding sub-driving times, reducing the data size and transmission demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pulse width modulation is used to eliminate storage capacitor influence, then drive consistency is improved, but transmission speed requirements for driver IC and storage access increase
Solution Approach 1:
The grayscale value transmission is segmented into multiple sub-frames, where each sub-frame transmits a portion of the data. This segmentation allows the system to maintain drive consistency through PWM while reducing the data transmission burden on the driver IC and storage, as each sub-frame carries only a fraction of the total data load.
2Reliability
If data transmission speed is increased to eliminate storage capacitor influence, then drive consistency is improved, but driver IC and storage access speed requirements become restrictive
Solution Approach 1:
The data transmission process is divided into multiple segments corresponding to different sub-frames. Each sub-frame transmits a portion of the grayscale data, which reduces the peak data transmission rate required from the driver IC and storage system, thereby lowering the complexity and cost requirements for these components while still achieving drive consistency through PWM.
3Manufacturing precision
If grayscale values are transmitted in full resolution, then image quality is maintained, but data transmission speed requirements increase
Solution Approach 1:
The full-resolution grayscale data is segmented across multiple sub-frames for transmission. Each sub-frame carries a portion of the grayscale information, which reduces the instantaneous data transmission rate required while maintaining the overall image quality through sequential reconstruction of the complete grayscale values.
Data Source
AI summary
An method of driving an AMOLED is provided, including: dividing grayscale values of each pixel of each frame into N portions, so as to obtain N PWM driving signals of an organic light emitting diode; dividing the driving time of each frame of the organic light emitting diode into N sub-driving times, wherein one of the sub-driving times of each frame corresponds to one of the PWM driving signals; and transmitting all of the PWM driving signals of each frame to the organic light emitting diode at the corresponding sub-driving time, so as to drive and display an image.