Display Control Device Sensor Abnormality Correction
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Solution Overview
Problem
Existing display control technologies fail to appropriately adjust luminance when abnormalities in illuminance sensors are detected, leading to potential inaccuracies in luminance adjustment.
Innovation Solution
A display control device that includes an illuminance acquisition unit, an abnormality detection unit, and a luminance control unit, which acquires target luminance from correspondence information based on the surrounding illuminance and corrects it when an abnormality in one or both illuminance sensors is detected, ensuring appropriate luminance adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple illuminance sensors are used to detect surrounding illuminance, then measurement precision is improved, but reliability deteriorates when sensor abnormalities occur
Solution Approach 1:
The system performs preliminary actions by detecting sensor abnormalities before they affect luminance adjustment accuracy. The abnormality detection unit continuously monitors sensor status and identifies faulty sensors in advance, allowing the system to switch to using only normal sensors before measurement precision deteriorates
Solution Approach 2:
The system implements feedback mechanisms where the abnormality detection unit provides information about sensor status back to the luminance control unit. This feedback loop enables the system to dynamically adjust which sensors are used for illuminance detection, maintaining reliability even when some sensors become abnormal
2Device complexity
If illuminance sensor abnormalities are not detected, then device complexity is reduced, but luminance adjustment accuracy deteriorates
Solution Approach 1:
The abnormality detection unit is merged with the existing illuminance detection system, combining sensor monitoring and luminance control functions into an integrated system. This approach maintains measurement precision without significantly increasing device complexity, as the abnormality detection leverages the same hardware infrastructure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables more accurate and appropriate luminance adjustment by detecting and addressing sensor abnormalities, ensuring optimal display visibility even when one sensor is faulty.
Implementation Method 1
a first illuminance sensor (42) installed at a position at which illuminance by light transmitting through a front windshield of the vehicle is detected more easily than the second illuminance sensor inside the vehicle
Implementation Method 2
a second illuminance sensor (44) which detects illuminance by light on the rear side in front and rear directions of the vehicle
Data Source
AI summary
A display control device includes: an illuminance acquisition unit configured to acquire surrounding illuminance of a display unit on the basis of one or both of first illuminance detected by a first illuminance sensor and second illuminance detected by a second illuminance sensor; a storage unit configured to store correspondence information in which illuminance is associated with target luminance; a luminance control unit configured to control luminance of a screen of the display unit on the basis of the acquired illuminance and the correspondence information; and an abnormality detection unit configured to detect an abnormality of at least the first illuminance sensor. The luminance control unit acquires the target luminance associated with the surrounding illuminance of the display unit from the correspondence information on the basis of the surrounding illuminance when the abnormality of the first illuminance sensor is not detected. The luminance control unit acquires the target luminance on the basis of information in which one or both of the second illuminance and the correspondence information is corrected and performs control such that the luminance of the screen of the display unit becomes the target luminance when the abnormality of the first illuminance sensor is detected.