Driver Circuit Dynamic Voltage Switching for Power Reduction
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Solution Overview
Problem
The increasing demand for larger and higher-resolution displays in mobile devices leads to higher power consumption in source drivers, particularly due to the number of output buffers, necessitating a reduction in power consumption without compromising functionality.
Innovation Solution
A driver circuit and operational amplifier circuit that can switch between different operating voltage levels, utilizing power switching circuits to dynamically adjust the supply voltage for input and output stages, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of output buffers in the source driver is increased to meet larger and higher-resolution display demands, then the display size and resolution are improved, but the power consumption of the source driver increases significantly
Solution Approach 1:
The patent implements dynamic voltage switching in the output buffer circuitry, allowing the circuit to operate at different voltage levels (first voltage level and second voltage level) based on operational requirements. This dynamic adjustment enables the display to maintain high resolution while consuming less power during operations that do not require maximum performance, thereby resolving the contradiction between display resolution and power consumption.
2Adaptability or versatility
If more output buffers are added to support greater display functions, then the functionality and resolution of the display are enhanced, but the power consumption of the output buffers increases
Solution Approach 1:
The patent changes the operating voltage parameter of the output buffers dynamically. The circuit can switch between a first voltage level and a second voltage level, allowing the display to adapt its power consumption to the actual functional requirements. This parameter change enables the system to maintain enhanced display functionality while reducing power consumption when full performance is not needed.
3Use of energy by moving object
If the operating voltage of the output buffers is reduced to lower power consumption, then the power usage is decreased, but the circuit functionality and performance may be compromised
Solution Approach 1:
The patent employs dynamic voltage switching that allows the output buffers to operate at a first voltage level when high performance and full functionality are required, and switch to a second (lower) voltage level when power conservation is the priority and reduced performance is acceptable. This dynamic approach ensures that circuit functionality is maintained when needed while achieving power consumption reduction during normal operation.
Data Source
AI summary
A driver circuit is provided. The driver circuit includes a first operational amplifier circuit, a second operational amplifier circuit, and at least one power switching circuit is provided. The first operational amplifier circuit receives a first input signal and generates a first output signal according to the first input signal. The second operational amplifier circuit receives a second input signal and generates a second output signal according to the second input signal. The at least one power switching circuit is configured to be coupled to switch a first input stage circuit to one of a first output stage circuit and a second output stage circuit, and the at least one power switching circuit is further coupled to switch a second input stage circuit to the other one of the first output stage circuit and the second output stage circuit.