Vehicle Display Device with Lowered Linear Light Emitter
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Solution Overview
Problem
Existing vehicle display devices with linear light emitting portions can be annoying to drivers when the necessity of alerting is low, as they are within the driver's direct visual field, leading to discomfort.
Innovation Solution
A vehicle display device with a linear light emitting portion positioned lower than the driver's visual field when looking straight ahead, emitting light at a specific angle of depression (20° to 40°) and blinking period (200 ms to 600 ms), and optionally equipped with a lens cover and eaves portion to prevent sunlight interference and improve visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the linear light emitting portion is positioned within the driver's visual field, then the driver can easily recognize the light emission for alerting, but the driver may feel annoyed by the light emission when the necessity of alerting is low
Solution Approach 1:
The patent positions the light emitting portion in a different spatial dimension (lower height position) relative to the driver's direct visual field, specifically at an angle of depression between 20° to 40° below the horizontal line from the driver's eyes. This dimensional repositioning allows the light to be recognized when needed while avoiding constant visibility that causes annoyance
2Object-affected harmful factors
If the light emitting portion is positioned lower than the driver's visual field, then driver annoyance is reduced, but the driver's ability to recognize the light emission may be compromised
Solution Approach 1:
The patent optimizes specific parameters including the angle of depression (20° to 40° below horizontal), blinking period (200 ms to 600 ms), and position in the vehicle transverse direction (intermediate region). These parameter changes ensure the light remains visible and recognizable while minimizing driver annoyance
3Illumination intensity
If sunlight enters the vehicle cabin through the front windshield, then the interior becomes illuminated, but the direct light from the light emitting portion may be obscured or recognition hindered
Solution Approach 1:
The patent introduces an eaves portion as an intermediary structure that extends obliquely upward and rearward from above the light emitting portion. This eaves structure acts as a shield or mediator that blocks direct sunlight from reaching the light emitting portion while allowing the emitted light to reach the driver, preventing obscuration
Data Source
AI summary
A vehicle display device includes a light emitting device having a light emitting portion that is linear and that is provided at a front side of a vehicle cabin such that direct light that is emitted can be seen by a driver. The light emitting portion is disposed at a height position that is configured to be further toward a lower side than a visual field of the driver in a case in which the driver drives while looking straight ahead.