Foldable Display Data Driver Current Adjustment
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Solution Overview
Problem
Foldable display apparatuses consume power even when displaying a black image on inactive areas, leading to inefficient power management.
Innovation Solution
A display apparatus with a data driver that adjusts its driving current based on the display mode and the folded state of the panel, using a current mirror circuit to manage power consumption by varying the driving current according to the active display area, thereby reducing power usage in partial display modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data driver operates with a fixed driving current to ensure stable image display across the entire display area, then display quality is maintained, but power consumption increases when only a portion of the display area is active
Solution Approach 1:
The data driver dynamically adjusts its driving current based on the active display area. When the display panel is folded and only a portion of the display area is active, the data driver reduces its driving current accordingly. This dynamic adjustment maintains reliable image display on the active area while reducing power consumption compared to using a fixed driving current for the entire display area.
2Reliability
If the data driver uses a higher driving current to ensure sufficient signal strength for distant data lines, then signal integrity is improved, but power consumption increases
Solution Approach 1:
The data driver implements local quality by providing different driving currents to different groups of data lines based on their distance from the data driver and the active display area. Data lines serving active display areas receive sufficient current for signal integrity, while data lines serving inactive areas receive reduced or zero current, optimizing the balance between signal quality and power consumption.
3Adaptability or versatility
If the data driver continuously drives all data lines to maintain readiness for any display configuration, then adaptability is improved, but power consumption increases
Solution Approach 1:
The data driver uses periodic action by selectively enabling and disabling data line groups based on the current display configuration. When the display panel is folded and only a portion is active, the data driver periodically activates only the necessary data lines for the active area while keeping others inactive. This maintains adaptability to different display configurations while reducing power consumption by not continuously driving all data lines.
Data Source
AI summary
A display apparatus includes: a foldable display panel to display an image; a gate driver to output a gate signal to the foldable display panel; and a data driver to output a data voltage to the foldable display panel according to a driving current. The driving current is changed according to a display mode that corresponds to a folded state of the foldable display panel.