Display Power Supply Circuit for Input Voltage Margin Control
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Solution Overview
Problem
Existing display devices face voltage margin defects due to voltage drops at the input end of the power supply, leading to increased component count and costs when additional boost integrated circuits are used to disperse currents.
Innovation Solution
A power supply system that adjusts reference voltages and output power based on input voltage fluctuations, varying output voltage or current without adding extra components, using a reference voltage generation circuit and power voltage generation circuit to maintain voltage margins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate boost integrated circuit is configured for source drive IC to disperse currents, then voltage margin defect is improved, but number of components increases and costs increase
Solution Approach 1:
The patent merges the boost circuit functionality into the existing power supply circuit, eliminating the need for a separate boost integrated circuit. The power supply circuit is configured to directly output boosted voltages required by the source drive IC, thereby improving voltage margin while reducing component count and costs.
Solution Approach 2:
The power supply circuit is designed to perform multiple functions: it provides standard operating voltages and simultaneously generates boosted voltages when needed. This multi-functional design eliminates the requirement for dedicated boost circuits while maintaining voltage margin under heavy load conditions.
2Reliability
If a separate boost integrated circuit is configured for source drive IC to disperse currents, then voltage margin defect is improved, but costs increase
Solution Approach 1:
The patent merges the boost circuit functionality into the existing power supply circuit, eliminating the need for a separate boost integrated circuit. The power supply circuit is configured to directly output boosted voltages required by the source drive IC, thereby improving voltage margin while reducing component count and costs.
Solution Approach 2:
The power supply circuit is designed to perform multiple functions: it provides standard operating voltages and simultaneously generates boosted voltages when needed. This multi-functional design eliminates the requirement for dedicated boost circuits while maintaining voltage margin under heavy load conditions.
3Reliability
If a separate boost integrated circuit is configured for source drive IC to disperse currents, then voltage margin defect is improved, but circuit board space is reduced
Solution Approach 1:
The patent merges the boost circuit functionality into the existing power supply circuit, eliminating the need for a separate boost integrated circuit. The power supply circuit is configured to directly output boosted voltages required by the source drive IC, thereby improving voltage margin while reducing component count and costs.
Data Source
AI summary
A power supply according to an embodiment and a display device including the same are disclosed. The power supply according to the embodiment includes a reference voltage generation circuit configured to adjust a voltage level of a reference voltage and output the reference voltage when an input voltage is smaller than or equal to a selected threshold value. The power supply includes a power voltage generation circuit configured to adjust and provide an output power according to a fluctuation amount of the input voltage based on the adjusted reference voltage. The output power is varied either by changing the output voltage or by changing the output current.