Display Device Power Supply Feedback Voltage Compensation
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Solution Overview
Problem
Display devices face challenges in maintaining sufficient luminance due to voltage drops in the power supply, particularly at the connectors and circuit boards, which can lead to reduced performance and efficiency.
Innovation Solution
The display device incorporates a feedback mechanism where a feedback line connects the second pad on the second circuit board directly to the power supply, allowing it to adjust the output voltage based on the feedback voltage, thereby compensating for voltage drops and ensuring consistent power delivery to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a feedback mechanism is implemented to compensate for voltage drops, then luminance stability is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where a feedback line connects the second pad on the second circuit board directly to the power supply. This allows the power supply to receive feedback voltage and adjust the output voltage in real-time to compensate for voltage drops occurring at connectors and circuit boards, thereby maintaining stable luminance output.
Solution Approach 2:
The feedback line acts as an intermediary element that transfers voltage information from the second pad back to the power supply. This intermediary connection enables the system to detect and compensate for voltage drops without requiring direct monitoring of all intermediate components, thus managing complexity while maintaining stability.
2Reliability
If voltage compensation is implemented through feedback lines, then power delivery consistency is improved, but manufacturing complexity increases
Solution Approach 1:
The feedback mechanism enables real-time monitoring and adjustment of power delivery. The power supply receives feedback voltage through the feedback line and dynamically adjusts its output to maintain consistent power delivery to the display panel, compensating for variations introduced by connectors and circuit board traces.
Solution Approach 2:
The feedback mechanism works to maintain equipotential conditions by adjusting the power supply output voltage to match the actual voltage received at the second pad. This compensates for voltage drops and ensures that the display panel receives the intended power level despite variations in the power delivery path.
Data Source
AI summary
A display device may include a display panel, a first circuit board, a second circuit board, and a power supply. The display panel may include a pixel and a first pad electrically connected to the pixel. The second circuit board may be electrically connected through the first circuit board to the first pad and may include a second pad, a first power connection line, and a first feedback line. The power supply may be electrically connected through the first power connection line to the second pad, may be electrically connected through the first feedback line to the second pad, may supply a first power through the second pad to the display panel, and may receive a feedback voltage of the second pad through the first feedback line.