Rear Dimming Glass Control for Visibility in Reverse
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Solution Overview
Problem
Users of vehicles with rear dimming glasses face difficulty in visual confirmation during backward movement, especially in low light or rainy conditions, requiring frequent manual adjustments to improve visibility, which is not user-friendly.
Innovation Solution
A dimming glass control device with a dimming film that adjusts transmittance based on detected external conditions such as brightness, rain, headlight status, wiper operation, and vehicle movement, using a voltage applying section, status detecting sensors, and a control section to maintain maximum transmittance in adverse conditions to prevent degradation of the rear field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the rear glass is set to non-transparent configuration to improve privacy and reduce external light interference, then privacy protection is improved, but visual confirmation of rear status during backward movement becomes difficult
Solution Approach 1:
The patent applies dynamics by making the glass transmittance state changeable based on vehicle operation status. The control section automatically switches the rear glass between transparent and non-transparent states depending on whether the vehicle is moving backward or forward, allowing the system to adapt its optical properties to different operational contexts rather than remaining static
Solution Approach 2:
The patent implements feedback by using the operation status detection (reverse gear engagement) to automatically control the glass transmittance. The detection section monitors vehicle operation state and feeds this information to the control section, which then adjusts the dimming film transmittance accordingly, creating a closed-loop system that responds to operational conditions
2Ease of operation
If manual adjustment of transmittance is required to maintain visibility during backward movement, then visual confirmation is improved, but user friendliness and convenience deteriorate
Solution Approach 1:
The patent applies self-service by enabling the system to automatically adjust glass transmittance based on detected operation status without requiring user intervention. The control section autonomously determines when transparent state is needed (during backward movement) and activates the voltage applying section accordingly, making the system self-regulating rather than requiring manual user control
3Ease of operation
If the rear glass maintains transparent configuration to improve rear visibility, then visual confirmation during backward movement is improved, but privacy protection and reduction of external light interference worsen
Solution Approach 1:
The patent applies dynamics by making the glass transmittance state changeable based on vehicle operation status. The control section automatically switches the rear glass between transparent and non-transparent states depending on whether the vehicle is moving backward or forward, allowing the system to adapt its optical properties to different operational contexts rather than remaining static
Solution Approach 2:
The patent applies parameter changes by modifying the optical transmittance parameter of the glass based on detected operation status. The control section changes the transmittance parameter from high (transparent) during backward movement to low (non-transparent) during forward movement, dynamically adjusting this key parameter to resolve the contradiction between visibility and light interference
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
Enhances user friendliness by automatically maintaining optimal visibility during backward vehicle operation by preventing unnecessary reduction in transmittance in adverse conditions, reducing the need for manual adjustments and improving rear field of view.
Implementation Method 1
the dimming film has a transmittance of light which is changed depending on application of an AC voltage
Data Source
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AI summary
An objective of the present invention is to control a dimming glass as a rear glass while improving a user friendliness regarding a backward operation of a vehicle. A dimming glass control device 100 includes a voltage applying section 110 configured to change the transmittance by application and non-application of the AC voltage to the dimming film of a dimming glass 11 as a rear glass 11a for a vehicle; a status detecting section 120 configured to detect a brightness/darkness status in an outside of the vehicle, a weather status, a status of switching-on instruction for a headlight, a status of operation instruction for a rear wiper, and a movement status of the vehicle; and a control section 130 configured to cause the voltage applying section 110 to reduce the transmittance of the dimming film and to prohibit reduction of the transmittance, upon a detection result of the status detecting section 120 indicating a dark state in the outside of the vehicle; a rain state; a light on-state of the headlight; a wiper on-state of the rear wiper; and a backward moving state of the vehicle.