Digital Pixel Driving Circuit Leakage Control
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Solution Overview
Problem
Current digital pixel driving circuits fail to accurately control organic light-emitting diodes (OLEDs) due to leakage current, causing them to emit light even when instructed to turn off, which affects display efficiency and accuracy.
Innovation Solution
A digital pixel driving circuit comprising a pixel driving module, a display module, a storage module, and a short-circuiting module, where the storage module buffers level signals and the short-circuiting module short-circuits the display module's input and output terminals when instructed to turn off, preventing leakage current from driving the OLED to display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a digital pixel driving circuit is used to control OLED, then power consumption is reduced and signal interference resistance is improved, but leakage current causes the OLED to emit light even when instructed to turn off
Solution Approach 1:
The pixel circuit is segmented into multiple functional modules: a pixel driving module for normal operation, and a short-circuiting module specifically designed to handle the turn-off state. This segmentation allows each module to be optimized for its specific function, with the short-circuiting module dedicated to eliminating leakage current effects.
Solution Approach 2:
The short-circuiting module acts as an intermediary component between the pixel driving module and the OLED. It is controlled by a short-circuiting control signal that activates only when the pixel needs to be turned off, providing a controlled path to eliminate leakage current without affecting normal operation.
2Reliability
If the short-circuiting module is added to eliminate leakage current, then control accuracy is improved, but device complexity increases
Solution Approach 1:
The short-circuiting module shares control signals and electrical connections with existing circuit components. The short-circuiting control signal is generated from the same data line infrastructure, and the module utilizes existing power supply and signal routing, thereby reducing the need for entirely separate control infrastructure.
3Use of energy by moving object
If the pixel circuit is optimized for low power consumption, then energy efficiency is improved, but susceptibility to signal interferences and drive device consistency issues increases
Solution Approach 1:
The short-circuiting module automatically activates in response to leakage current effects without requiring external intervention or complex compensation circuits. It self-regulates the pixel state by detecting the need for short-circuiting and executing the correction, reducing dependence on drive device consistency.
Data Source
AI summary
A digital pixel driving circuit and a digital pixel driving method. The digital pixel driving circuit includes a pixel driving module, a display module, a storage module and a short-circuiting module. An output terminal of the pixel driving module is electrically connected to an input terminal of the display module, and a control terminal of the pixel driving module is electrically connected to any output terminal of the storage module. An input terminal of the short-circuiting module is electrically connected to the input terminal of the display module, an output terminal of the short-circuiting module is electrically connected to an output terminal of the display module, and a control terminal of the short-circuiting module is electrically connected to any output terminal of the storage module.