Display Device Luminance Control via Adaptive Illuminance Ranges
Solution Overview
Problem
Existing display devices, such as liquid crystal display devices, fail to accurately adjust the luminance of their light sources in response to changing environmental illuminance, leading to user dissatisfaction with image brightness and requiring manual adjustments that are not seamlessly integrated with automatic adjustments.
Innovation Solution
A control method and system for a display device that determines the environmental illuminance range and adjusts the light source luminance accordingly, using multiple luminance information sets and updating these based on user operations to ensure seamless transitions between different illuminance conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the luminance of the light source is automatically adjusted based on illuminance, then the adaptability to environmental conditions is improved, but the user cannot manually override the luminance when the displayed image appears dark or bright
Solution Approach 1:
The system monitors user manual adjustments to luminance and uses this feedback to automatically update the luminance information stored in its memory. When a user manually adjusts luminance, the system detects this operation and modifies its stored luminance information accordingly, enabling the automatic adjustment mechanism to adapt to user preferences and environmental conditions over time.
Solution Approach 2:
The system pre-stores multiple sets of luminance information corresponding to different illuminance ranges. This preliminary preparation allows the system to quickly switch between appropriate luminance settings when environmental conditions change, without requiring real-time calculation or user intervention for each transition.
2Device complexity
If the luminance is adjusted in stages based on illuminance thresholds, then the automatic control is simplified, but the system fails to respond to temporary or small changes in environmental illuminance
Solution Approach 1:
The system dynamically updates its luminance information based on user operations and environmental conditions. Rather than using fixed stage-based adjustments, the system adapts its luminance settings in real-time by incorporating user feedback, allowing it to respond flexibly to temporary or small changes in illuminance while maintaining a relatively simple control structure.
3Measurement precision
If separate luminance information is stored for different illuminance ranges, then the precision of luminance control is improved, but the device complexity increases due to multiple luminance information sets
Solution Approach 1:
The multiple luminance information sets serve multiple functions: they provide precise control for different illuminance conditions, store user preferences across various environments, and enable both automatic and manual adjustment modes. This multi-functionality reduces the need for separate systems for each function, thereby managing complexity while maintaining precision.
4Stability of the object's composition
If the system does not update luminance information during temporary illuminance changes, then the stability of luminance control is improved, but the system fails to adapt when environmental conditions permanently change
Solution Approach 1:
User operations serve as feedback signals that help the system distinguish between temporary and permanent environmental changes. When users manually adjust luminance during what would otherwise be considered temporary conditions, the system uses this feedback to update its stored luminance information, thereby adapting to genuine environmental changes while maintaining stability during transient variations.
Data Source
AI summary
A control method for a display device includes: determining whether an illuminance in an environment where a display device having a light source is installed belongs to a first range or a second range; when the illuminance in the environment belongs to the first range, adjusting a luminance of the light source by referring to first luminance information designating the luminance corresponding to when the illuminance in the environment belongs to the first range; when the illuminance in the environment belongs to the second range, adjusting the luminance by referring to second luminance information designating the luminance corresponding to when the illuminance in the environment belongs to the second range; when a first operation of changing the luminance when the illuminance belongs to the first range is accepted from a user, updating the first luminance information to an updated first luminance information in response to the first operation; updating the second luminance information, based on the updated first luminance information; when a second operation of changing the luminance when the illuminance belongs to the second range is accepted from the user, updating the second luminance information to an updated second luminance information in response to the second operation; and updating the first luminance information, based on the updated second luminance information.