Vehicle Camera Window Heated Portion for Even Heat Distribution
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Solution Overview
Problem
Existing vehicle photographing apparatuses face issues with condensation and ice on front window light transmissive portions, leading to blurred images and potential short-circuits due to uneven heating and proximity of heater ends.
Innovation Solution
A polygonal-shaped heated portion is positioned inside the vehicle to radiate heat evenly onto the front window, with heater ends placed at corner portions to prevent short-circuits and ensure even heating, using a series electrical circuit with a fuse module to manage heat and prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heater ends are connected using electrically conductive connectors (solder), then the electrical connection is established, but the total cross-section area increases and electrical resistance decreases, causing uneven heat distribution and potential short-circuits
Solution Approach 1:
The patent introduces a heat-resistant insulating adhesive tape as an intermediary material between the heater ends and the electrically conductive connectors. This tape serves as a mediator that provides electrical insulation while allowing thermal contact, thus preventing short-circuits between the heater ends and the connectors, and maintaining uniform heat distribution across the heated portion.
2Stability of the object's composition
If the heater is fixed to the heated portion with both ends at corner portions, then the heater stability is improved, but the distance between heater ends becomes short, increasing short-circuit risk
Solution Approach 1:
The heat-resistant insulating adhesive tape acts as an intermediary insulating layer that enables the heater ends to be positioned at corner portions of the heated portion for stable fixation, while simultaneously preventing electrical short-circuits between the heater ends and the electrically conductive connectors by providing adequate electrical insulation.
3Reliability
If electric power is supplied to the heater to disperse condensation and ice, then the image pickup quality is improved, but the heater ends may overheat and cause short-circuits
Solution Approach 1:
The heat-resistant insulating adhesive tape serves as a protective intermediary that insulates the heater ends from the electrically conductive connectors, preventing heat transfer that would cause connector overheating and short-circuits, while allowing the heater to operate at full power to effectively disperse condensation and ice on the light transmissive portion.
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
The solution effectively disperses condensation and ice on the front window, ensuring clear images and reducing the risk of short-circuits by maintaining even temperature distribution and using a fuse module to manage heat, thus enhancing the reliability of the vehicle's pre-crash safety system.
Implementation Method 1
the heater generates heat when being supplied electrical power from the electric power source
Implementation Method 2
radiant heat emitted from the heated portion is transmitted to the light transmissive portion
Data Source
AI summary
The photographing apparatus for vehicle includes image pickup device which is disposed inside of a window part provided in a vehicle and receives photographing luminous flux passing through a light transmissive portion, a heater, composed of heated wire, generates heat when being supplied electrical power from electric power source, a heated portion, fixed to the heater, faces an inner surface of the light transmissive portion and gives radiant heat to the light transmissive portion when receiving heat from the heater. The heated portion is a plate having a polygonal shape. Both ends of the heater are positioned at two different corner portions of the heated portion.