Electrochromic Dimming Device for In-Vehicle Rear-View Display Glare Control
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Solution Overview
Problem
Existing in-vehicle rear-view display systems face issues with glare due to high luminance or significant luminance differences, which can affect viewing clarity and vision health, and conventional anti-glare films compromise screen clarity.
Innovation Solution
An in-vehicle rear-view display system with a dimming device that adjusts luminance based on ambient light changes, controlled by a first control unit, eliminating the need for anti-glare films by using an electrochromic material to modify light emission and incorporating features like photosensitive units, visual tracking, and communication units for optimal display adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an anti-glare film is added to the display screen to prevent glare, then glare phenomenon is reduced, but screen clarity deteriorates and fine blur occurs
Solution Approach 1:
The patent extracts the anti-glare function from the traditional anti-glare film approach and implements it through a dimming device with electrochromic material that can be controlled independently. This allows the glare prevention function to be separated from the screen structure itself, avoiding the clarity degradation caused by physical films while maintaining the glare reduction benefit.
Solution Approach 2:
The patent employs a dynamic dimming device that can adjust its luminance transmission in real-time based on ambient light conditions detected by a photosensitive sensor. Unlike a static anti-glare film that always reduces clarity, this dynamic system only activates glare prevention when needed, maintaining screen clarity under normal conditions while preventing glare when ambient light becomes problematic.
2Illumination intensity
If luminance of light source is increased to improve visibility, then viewing clarity is improved, but glare phenomenon is generated and vision health is affected
Solution Approach 1:
The patent changes the parameter of light transmission through the dimming device based on ambient light conditions. The electrochromic material adjusts its optical properties dynamically, allowing high luminance from the display to be maintained while controlling the amount of light that reaches the viewer's eyes, thereby preventing glare while preserving visibility.
Solution Approach 2:
The system incorporates a photosensitive sensor that detects ambient light conditions and provides feedback to the control unit. This feedback mechanism allows the system to automatically adjust the dimming device's luminance transmission to prevent glare while maintaining optimal viewing clarity, creating a closed-loop control system that balances visibility and glare prevention.
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
Effectively prevents glare without compromising screen clarity, ensuring improved viewing comfort and health by dynamically adjusting luminance and display orientation based on ambient conditions.
Implementation Method 1
the material of the dimming device is an electrochromic material
Data Source
AI summary
An in-vehicle rear-view display system is described, comprising: a display device comprising a dimming device configured to adjust luminance of light emitted from the display device based on a color change of the dimming device; a first control unit connected with the dimming device and configured to control the color change of the dimming device in accordance with a luminance change of an irradiation light. By arranging in the display device a dimming device capable of adjusting the luminance of light emitted from the display device, the first control unit can control the color change of the dimming device in accordance with the luminance change of the ambient light, and thereby control the luminance of light emitted from the display device so as to preventing glare. Meanwhile, the poor clarity of the screen caused by an anti-glare screen film added to the screen of the display device is avoided.