HUD Light-Receiving Unit Extraction for Lid Fitting
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Solution Overview
Problem
Existing head-up display devices face challenges in easily fitting the lid body to the case while connecting the light-receiving unit to the control board, as the connecting member can get caught between components, restricting movement and potentially affecting detection accuracy.
Innovation Solution
The head-up display device incorporates a light-receiving unit with a sensor holding portion that is held by a holder, which is integrated with the reflection unit's mirror holder, allowing the connecting member to be accommodated within the case, thus preventing restriction during lid body fitting. Additionally, a cylindrical portion surrounds the light-receiving sensor for protection and to maintain detection accuracy, and components are integrated to reduce the number of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connecting member length is increased to allow easy fitting of the lid body, then the fitting ease is improved, but the connecting member may get caught between the case and the lid body
Solution Approach 1:
The light-receiving unit is extracted from the lid body and relocated to the case, separating it from the moving lid body. This extraction eliminates the problem of the connecting member getting caught during lid body fitting, as the light-receiving unit remains stationary within the case while the lid body moves independently.
Solution Approach 2:
The device is segmented into two independent parts: the case containing the light-receiving unit and control board, and the lid body that can move freely. This segmentation allows the lid body to be fitted easily without being constrained by the connecting member, while the light-receiving unit remains positioned for accurate detection.
2Reliability
If the connecting member length is reduced to prevent it from getting caught, then the reliability is improved, but the range of movement of the lid body is restricted
Solution Approach 1:
The light-receiving unit is extracted from the lid body and placed in the case, eliminating the need for a long connecting member. This extraction resolves the contradiction by allowing the lid body to move freely without restriction while maintaining reliable connection through a shorter connecting member.
3Ease of operation
If the light-receiving unit is mounted on the lid body for easy connection, then the ease of operation is improved, but the connecting member restricts the lid body movement range
Solution Approach 1:
The light-receiving unit is extracted from the lid body and relocated to the case. This extraction resolves the contradiction by maintaining easy connection through the connecting member while eliminating the restriction on lid body movement range, as the light-receiving unit is now stationary in the case.
Solution Approach 2:
The system is segmented into a stationary case containing the light-receiving unit and a movable lid body. This segmentation allows the lid body to achieve full movement range while the light-receiving unit remains properly connected through the connecting member to the control board in the case.
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
Facilitates easy fitting of the lid body by avoiding connecting member restrictions, maintains detection accuracy by preventing center deviations, and reduces the number of components required, enhancing the overall structure and functionality of the head-up display device.
Implementation Method 1
a light-receiving unit (70) which detects light from the outside
Implementation Method 2
a reflection unit (60) which reflects the light projected from the projector
Data Source
AI summary
Provided is a head-up display device wherein in a state where a light-receiving unit is connected to a control substrate, a lid can be easily mounted to a case. Housed in a case of a head-up display device are a substrate for controlling a projector and a reflection unit for reflecting light projected thereon by the projector. The reflection unit is configured to have a reflecting mirror that is held by a holder, while the substrate is connected, via a connection member, with a light-receiving unit for detecting light from outside. The light-receiving unit is configured to have a light-receiving sensor that is held by a sensor holding part. The sensor holding part for holding the light-receiving sensor is held by the holder.