Vehicle Display Backup Mode for Panel Failure Visibility
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Solution Overview
Problem
In-vehicle displays face safety and usability issues when faulty, as they rely on functional normality, leading to impaired driving information availability, affecting driving safety and user experience.
Innovation Solution
Implementing a display control method and apparatus with multiple modes, using a backlight unit to display essential information when the panel fails, ensuring backup display and energy-efficient operation, and switching to normal mode when the panel recovers or battery level improves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display relies on functional normality of the panel for safety, then the display quality is improved, but the reliability deteriorates when the panel fails
Solution Approach 1:
The system performs preliminary safety verification by detecting panel health status before critical failure occurs. The control unit continuously monitors the panel and switches to backup display mode in advance when abnormalities are detected, ensuring safety is maintained proactively rather than reactively.
Solution Approach 2:
A driver board is introduced as an intermediary component between the display panel and the system. The driver board performs verification of the panel's functional status and can independently control a backup display, acting as a mediator that ensures safety even when the panel fails.
2Reliability
If the backup display is implemented using the driver board verification, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The driver board is designed with multi-functionality, serving both as the normal control interface for the display panel and as the control unit for the backup display. This universal component reduces the need for separate dedicated backup display controllers, thereby reducing overall system complexity while maintaining reliability.
Solution Approach 2:
Instead of creating a completely independent backup display system, the patent uses the existing driver board to control a simplified backup display. The driver board copies its verification and control functions to manage the backup display, reducing complexity by reusing existing components rather than adding entirely new ones.
3Manufacturing precision
If the display uses both backlight unit and panel, then the display quality is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts the display mode based on real-time panel health status. When the panel is healthy, both the backlight unit and panel operate together for high-quality display. When the panel fails or degrades, the system automatically switches to using only the backlight unit for backup display, thereby reducing power consumption while maintaining essential display functionality.
Solution Approach 2:
The system changes the operational parameters of the display system by switching between two distinct modes: full display mode (backlight + panel) for normal operation and backup display mode (backlight only) for safety operation. This parameter change allows the system to optimize power consumption based on the required display quality and panel status.
Data Source
AI summary
This application provides a display method and apparatus, and a terminal device. The method may be applied to a display. The display includes a backlight unit, a panel, and a first control unit. The display has a first display mode and a second display mode. The first display mode is displaying image information by using the backlight unit, the second display mode is displaying the image information by using the backlight unit and the panel, and the method includes: receiving a first status message by the first control unit, where the first status message indicates that the panel does not work; receiving a first image signal, where the first image signal is used to display first image information; and displaying the first image information in the first display mode based on the first status message.