Display Driving Circuit Voltage Phasing Power Reduction
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption, particularly in the current consumption of driving circuits that apply source driving voltage to source lines and common voltage to common electrodes, which is critical for compact and energy-efficient mobile electronic devices.
Innovation Solution
A driving circuit comprising a source driving circuit, a common voltage driving circuit, and a control circuit that applies external voltages to the source line and common electrode in a controlled manner, including alternating between different voltages and phasing changes to minimize power consumption, thereby reducing current consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional driving circuits are used to apply source driving voltage and common voltage, then the display panel can be driven, but the current consumption is high
Solution Approach 1:
The control circuit applies external voltages to the source line and common electrode before the main driving voltages are applied. This preliminary voltage application prepares the circuit elements in advance, reducing the voltage transition requirements and thereby reducing current consumption during the main driving operation while maintaining display performance
Solution Approach 2:
The invention changes the voltage parameters by applying external voltages with specific values between the maximum and minimum of the source driving voltage, and between the first and second common voltages. This parameter adjustment optimizes the voltage transitions and reduces the current consumption of the driving circuits
2Use of energy by moving object
If voltage transitions are managed with phasing changes to reduce power consumption, then current usage decreases, but the control complexity increases
Solution Approach 1:
The control circuit is divided into a first control circuit for applying external voltage to the source line and a second control circuit for applying external voltage to the common electrode. This segmentation allows independent control of different voltage applications, managing the complexity through modular design while achieving power consumption reduction
Data Source
AI summary
A driving circuit of a display device is provided. The driving circuit applies a first external voltage to a source line of a display panel before a source driving voltage is applied to the source line and applies at least one second external voltage to a common electrode of the display panel before one between a first common voltage and a second common voltage is applied to the common electrode, thereby reducing the driving power of the display device.