Vehicle Display Area Control Using Black Data for Power Saving
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Solution Overview
Problem
The increasing demand for vehicle displays in electric and autonomous vehicles necessitates reducing power consumption while maintaining display functionality, particularly in areas not directly related to driving, to enhance safety and efficiency.
Innovation Solution
A display device with independent display areas that can switch to a power saving mode when not in use, utilizing black data transmission and black voltage output to reduce power consumption, and adjustable viewing angles to minimize distractions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display device operates all display areas continuously at full resolution, then the display functionality and information visibility are maintained, but the power consumption increases
Solution Approach 1:
The display device is divided into multiple independent display areas (first display area for driving information, second display area for non-driving information). Each display area can be independently controlled and operated in different modes, allowing the non-driving area to enter power saving mode while the driving area maintains full functionality.
Solution Approach 2:
The display device dynamically adjusts its operation mode based on real-time conditions. The controller receives gaze detection signals to determine whether the user is looking at the display, and automatically switches between normal mode and power saving mode accordingly, optimizing power consumption while maintaining necessary display functionality.
2Use of energy by moving object
If the display device enters power saving mode by transmitting black data and outputting black voltage, then the power consumption is reduced, but the display brightness and visibility decrease
Solution Approach 1:
Different display areas have different quality requirements. The first display area (driving information) maintains full brightness and color quality, while the second display area (non-driving information) is reduced to black or low-brightness state when not viewed, optimizing power consumption without compromising critical information visibility.
Solution Approach 2:
The display device periodically updates the second display area with black data during power saving mode, rather than continuously transmitting image data. This periodic updating mechanism maintains the black voltage output while minimizing power consumption, and can quickly restore normal operation when needed.
3Adaptability or versatility
If the display device maintains fixed viewing angle, then the display structure is simple, but the user experience and safety are compromised when user position changes
Solution Approach 1:
The display device integrates multiple functions into a single system: it serves both as a fixed display and as an adjustable viewing angle display. The controller manages multiple operation modes (normal mode, power saving mode, different viewing angles) within the same hardware structure, providing versatility without requiring separate display systems for each function.
Data Source
AI summary
An embodiment includes a display panel configured to display an image; a data driving circuit configured to apply a data voltage to the display panel; and a timing controller configured to control the data driving circuit. The timing controller transmits black data to the data driving circuit for a first period in a power saving mode, the data driving circuit stores the black data and repeatedly outputs a black voltage according to the stored black data for a first frame period.