Source Driving Circuit Intermediate Voltage Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional source and common electrode driver circuits in flat panel displays, such as LCDs, consume high power due to the use of boosted voltages for driving data lines and common electrodes, leading to increased power consumption, especially in portable devices where battery life is a concern.
Innovation Solution
A source driving circuit with an intermediate voltage generator and a switching control unit that selectively applies source driving voltage and intermediate source driving voltage to data lines, controlling the transition timing to final levels of the common electrode voltage, reducing current consumption by optimizing the timing of voltage transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If boosted voltages are used for driving data lines and common electrodes, then driving capability is improved, but power consumption increases
Solution Approach 1:
The patent segments the voltage driving scheme into two parts: boosted voltage driving and non-boosted voltage driving. The switching control unit selectively applies boosted voltage to source data lines when needed, while using non-boosted voltage for common electrode driving, thereby reducing overall power consumption while maintaining necessary driving capability
Solution Approach 2:
The patent dynamically adjusts the voltage driving mode based on real-time display content analysis. The switching control unit monitors data patterns and automatically switches between boosted and non-boosted voltage modes, optimizing the balance between driving capability and power consumption according to actual display requirements
2Reliability
If boosted voltage is continuously applied to data lines, then display quality is maintained, but battery life is reduced
Solution Approach 1:
The patent implements periodic analysis of display data patterns to determine when boosted voltage is necessary. The switching control unit periodically evaluates data content and switches between voltage modes accordingly, maintaining display quality when needed while extending battery life during low-requirement periods
Solution Approach 2:
The patent changes the voltage parameter dynamically based on display content characteristics. By analyzing data patterns and adjusting voltage levels accordingly, the system maintains acceptable display quality while significantly reducing power consumption during periods when full boosted voltage is not required, thereby extending battery life
Data Source
AI summary
A source driving circuit includes a source driver circuit, an intermediate voltage generator, and a switching control unit. The source driver circuit receives display data and generates a source driving voltage corresponding to the received display data The intermediate voltage generator generates an intermediate source driving voltage. The switching control unit receives a plurality of control signals for selectively applying the source driving voltage and the intermediate source driving voltage to data lines of a display as a driving voltage and controls an order of transition to final levels of a common electrode voltage and the driving voltage. The common electrode voltage may be applied to a common electrode of a liquid crystal capacitor coupled to the data line of the display.