Auxiliary Display Unit for Low Power Always-On Mode
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Solution Overview
Problem
Mobile terminals face high power consumption when displaying information, leading to the need for frequent restarts to conserve energy, as existing display devices do not efficiently manage power usage in idle modes.
Innovation Solution
A display device with a matrix-form pixel array divided into a main display unit and an auxiliary display unit, sharing data lines and gate drivers, where the auxiliary unit operates in an always-on mode with reduced power consumption by fixing gate lines to a low voltage, while the main unit is inactive, and the auxiliary unit displays frequently needed information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display device operates in idle mode with full display activation, then information can be displayed, but power consumption increases
Solution Approach 1:
The pixel array is divided into a main display unit and an auxiliary display unit. The auxiliary display unit is configured to display information in idle mode while the main display unit remains inactive, thereby reducing overall power consumption while still providing information display functionality.
Solution Approach 2:
Different regions of the display are assigned different functions: the auxiliary display unit is optimized for idle mode information display with reduced power consumption, while the main display unit is reserved for full display operations. This local differentiation allows the system to consume less power during idle operations.
2Use of energy by moving object
If the display device is restarted frequently to conserve energy, then power consumption reduces, but user convenience deteriorates
Solution Approach 1:
The auxiliary display unit is pre-configured to provide essential information display functionality in idle mode. This preliminary setup allows the display to remain partially active and useful during idle periods, eliminating the need for frequent restarts while maintaining low power consumption.
3Device complexity
If the auxiliary display unit shares data lines with the main display unit, then device complexity reduces, but signal interference may increase
Solution Approach 1:
The auxiliary display unit shares data lines with the main display unit, consolidating the circuit structure and reducing overall device complexity. This merging approach minimizes the number of separate components while maintaining functional separation through control signals.
Solution Approach 2:
The display device operates in different modes (idle mode and full display mode) with periodic switching. During idle mode, the auxiliary display unit is activated; during full display mode, the main display unit is activated. This periodic operation ensures that both units share data lines without significant signal interference.
Data Source
AI summary
A display device and a mobile terminal include a main display unit and an auxiliary display unit that are driven in a full display mode or an always-on mode. The display device includes a data driver configured to supply a data voltage to the data lines, a first gate driver connected to gate lines of the main display unit, and a second gate driver connected to gate lines of the auxiliary display unit. In the full display mode, at least a portion of the main display unit and the auxiliary display unit display image data. In the always-on mode, at least a portion of the auxiliary display unit displays image data.