Vehicle Display Grounding Structure for Heat and Noise Control
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Solution Overview
Problem
Existing vehicle display devices lack effective noise countermeasures and heat dissipation measures for light sources.
Innovation Solution
A vehicle display device with a metal circuit board that includes a main body connected to ground and an extension portion in contact with the display, which serves as a heat sink and noise suppressor, eliminating the need for separate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional circuit board is used, then the light source can be mounted, but noise countermeasures are insufficient
Solution Approach 1:
The patent combines the circuit board and heat sink into a single integrated metal circuit board structure. The circuit board is formed from a conductive plate-shaped metal material that serves both as the mounting substrate for the light source and as a heat dissipation component, eliminating the need for separate heat sink components and improving noise countermeasures through the inherent shielding properties of the metal construction.
Solution Approach 2:
The metal circuit board performs multiple functions simultaneously: it serves as the electrical circuit substrate for mounting and connecting the light source, acts as a heat sink for thermal management through its conductive metal structure, and provides electromagnetic shielding for noise countermeasures. This multi-functional design reduces overall device complexity while improving reliability.
2Temperature
If heat dissipation measures are added, then heat generated by the light source can be dissipated, but the device structure becomes more complex
Solution Approach 1:
The circuit board and heat sink are merged into a single metal circuit board structure. The conductive plate-shaped metal material inherently provides thermal conduction pathways that dissipate heat from the light source mounting area, eliminating the need for separate heat sink components and reducing structural complexity.
Solution Approach 2:
The metal circuit board simultaneously serves as the electrical substrate and thermal management component. Its conductive metal construction provides both electrical connectivity for the light source and thermal conduction for heat dissipation, achieving dual functionality without increasing device complexity.
3Reliability
If separate heat sink and noise shielding components are added, then heat dissipation and noise suppression improve, but assembly complexity increases
Solution Approach 1:
The patent integrates the circuit board, heat sink, and noise shielding functions into a single metal circuit board component. This consolidation eliminates multiple separate parts that would require assembly, thereby reducing assembly complexity while maintaining effective heat dissipation and noise suppression capabilities through the inherent properties of the metal construction.
Solution Approach 2:
The metal circuit board performs multiple functions in a single component: electrical circuit substrate, heat sink for thermal management, and electromagnetic shield for noise suppression. This multi-functional integration eliminates the need for separate heat sink and shielding components, significantly reducing assembly complexity while improving overall reliability.
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
Simultaneously addresses noise suppression and heat dissipation, reducing component count and assembly complexity while maintaining a compact design.
Implementation Method 1
a metal circuit board formed of a conductive plate-shaped metal material... configured to include a main body on which the light source is mounted and which is connected to a ground... the extension portion is arranged in contact with the display so as to connect the display to the ground
Implementation Method 2
a metal circuit board formed of a conductive plate-shaped metal material... the main body is arranged to be exposed toward outside of the backlight case, and the extension portion is arranged in contact with the display so as to connect the display to the ground via the extension portion and the main body
Data Source
AI summary
A vehicle display device includes a display device that emits a display light. The display device has a display, a circuit board formed of a conductive metal material and on which a light source is mounted, and a backlight case that accommodates the light source and the display. The circuit board includes a main body on which the light source is mounted and which is connected to ground, and an extension portion extending from the main body toward the display. When assembled to the backlight case, the main body is positioned so as to be exposed from the backlight case and the extension portion is positioned in contact with the display so as to connect the display to the ground via the extension portion and the main body.