Power Voltage Generator Circuit for Display Flicker Noise Reduction
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Solution Overview
Problem
Display devices face issues with noise generation in driving voltages due to ground noise, leading to flicker in components connected to the power voltage generator.
Innovation Solution
A power voltage generator is designed to generate an analog reference voltage based on an input voltage, using a resistance string for voltage distribution, a decoding unit to generate reference voltages, and a regulator unit to produce driving voltages, thereby reducing the influence of noise on outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ground noise is present in the power voltage generator, then noise is generated in the driving voltages, but flicker occurs in the display components
Solution Approach 1:
The patent introduces an analog reference voltage generator as an intermediary component between the input voltage source and the regulator units. This generator produces a clean analog reference voltage that serves as a stable baseline, isolating the system from ground noise and preventing noise propagation to the driving voltages and display components.
Solution Approach 2:
The patent implements preliminary noise filtering by generating the analog reference voltage before it enters the regulator units. By establishing a clean reference voltage in advance, the system proactively prevents noise from affecting the driving voltages, rather than attempting to correct noise issues after they propagate through the system.
2Reliability
If the voltage level of reference voltages is increased, then the voltage gain of regulators is reduced, but the complexity of the voltage generation circuit increases
Solution Approach 1:
The patent divides the voltage generation function into separate specialized units: an analog reference voltage generator dedicated to producing stable reference voltages, and regulator units that use these references to generate driving voltages. This segmentation allows each unit to be optimized independently, achieving high reliability without requiring the entire system to be overly complex.
Solution Approach 2:
The analog reference voltage generator serves multiple functions simultaneously: it provides reference voltages for multiple regulator units, establishes a noise-free baseline for the entire system, and enables the regulators to operate with reduced voltage gains. This multi-functionality achieves improved noise characteristics without proportionally increasing overall system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed solution increases the voltage levels of reference voltages applied to regulators, reduces voltage gains of regulators, and minimizes the impact of noise on regulator outputs, improving noise characteristics.
Implementation Method 1
a first bandgap reference voltage generator configured to receive the first input voltage to generate a first bandgap reference voltage
Implementation Method 2
a resistance string configured to generate distribution voltages by performing voltage distribution on the analog reference voltage
Data Source
AI summary
A power voltage generator includes an analog reference voltage generator configured to generate an analog reference voltage based on a first input voltage, a resistance string configured to generate distribution voltages by performing voltage distribution on the analog reference voltage, a decoding unit configured to generate reference voltages by decoding the distribution voltages, and a regulator unit configured to generate driving voltages based on the reference voltages.