Display Panel Power Segmentation for Regional Overcurrent Protection
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Solution Overview
Problem
Existing electronic devices face challenges in ensuring reliable power distribution and protection against overcurrents, particularly in regions of the display panel, which can lead to device malfunction or failure.
Innovation Solution
The electronic device incorporates a power generation unit, first and second power measurement units, and an overcurrent protection unit to monitor and manage currents in different regions of the display panel, using a reference current calculated based on target currents to determine if power should be cut off, with larger pads for power and common power cables to facilitate higher current transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power is provided to the display panel through a single power line, then the device structure is simple, but the current distribution is uneven and overcurrent damage can occur
Solution Approach 1:
The power distribution system is segmented into multiple independent power lines (first power line and second power line) that separately supply power to different regions (first region and second region) of the display panel. This segmentation prevents current concentration in a single line and enables independent overcurrent protection for each region, resolving the contradiction between structural simplicity and current distribution safety.
2Reliability
If separate power lines are used for different regions, then current distribution safety is improved, but the device structure becomes more complex
Solution Approach 1:
Multiple power lines are merged at the power supply unit, which centrally generates and distributes power to both the first and second power lines. This merging approach maintains structural simplicity at the power source while enabling differentiated current control and protection for each region downstream, thus improving current distribution safety without excessively increasing overall device complexity.
Solution Approach 2:
The power supply unit performs multiple functions: it generates power for both power lines, measures currents in both lines, determines overcurrent conditions for both regions, and controls power cutoff for both regions. This multi-functionality consolidates control logic and reduces the need for separate control units for each power line, mitigating the increase in device complexity.
3Reliability
If overcurrent protection is implemented for the entire display panel, then power distribution safety is improved, but the precision of detecting specific overcurrent regions is reduced
Solution Approach 1:
The overcurrent protection system is segmented into region-specific measurement and control units. The first measurement unit measures current in the first power line supplying the first region, while the second measurement unit measures current in the second power line supplying the second region. This segmentation enables precise detection of overcurrent conditions in specific regions rather than treating the entire panel as a single unit, thus improving measurement precision while maintaining overall power distribution safety.
4Measurement precision
If region-specific power measurement is implemented, then measurement precision is improved, but the device complexity increases
Solution Approach 1:
The measurement and control functions for multiple power lines are merged into integrated units. The power supply unit incorporates both the first measurement unit and second measurement unit, along with the control logic for determining overcurrent conditions and executing power cutoff decisions. This merging reduces the need for completely separate control systems for each region, mitigating the increase in device complexity while maintaining region-specific measurement precision.
Data Source
AI summary
An electronic device includes: a display panel including an active area including a first region and a second region, a plurality of first circuit films, a plurality of second circuit films, a first circuit board, a second circuit board, a first circuit cable, a second circuit cable, and a main circuit board. The main circuit board includes: a power generation unit, which provides power to the display panel, a first power measurement unit electrically connected to the first circuit cable and the power generation unit, and, which measures a first current provided to the first region, a second power measurement unit electrically connected to the second circuit cable and the power generation unit, and, which measures a second current provided to the second region, and an overcurrent protection unit, which cuts off the power based on the reference current and each of the first and second currents.