Vehicle Display Light Pipe Layout for Compact Ambient Sensing
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Solution Overview
Problem
The integration of a light sensor in a vehicle display increases complexity and reduces compactness, making it difficult to integrate into the dashboard.
Innovation Solution
The light sensor is located directly on the main printed circuit board, and a light pipe is used to bring external light to the sensor, reducing the need for a dedicated printed circuit board and allowing flexibility in light collection area positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light sensor is mounted on a dedicated printed circuit board located close to the outer surface of the display, then the light collection efficiency is improved, but the device complexity and integration difficulty increase
Solution Approach 1:
The patent combines the light sensor with the main printed circuit board that already houses the control unit, eliminating the need for a separate dedicated printed circuit board. This merging reduces the overall number of components and simplifies the display structure while maintaining light sensing functionality.
Solution Approach 2:
The patent introduces a light pipe as an intermediary component to bridge the gap between the outer surface of the display and the light sensor mounted on the main printed circuit board. The light pipe efficiently conducts external light to the light sensor, compensating for the increased distance and maintaining light collection efficiency despite the sensor's relocated position.
2Measurement precision
If a light sensor is mounted on a dedicated printed circuit board located close to the outer surface of the display, then the light collection efficiency is improved, but the integration into the dashboard becomes more difficult
Solution Approach 1:
By merging the light sensor onto the existing main printed circuit board that already contains the control unit, the patent reduces the number of assembly steps and simplifies the integration process into the vehicle dashboard, while the light pipe ensures adequate light collection.
Solution Approach 2:
The light pipe serves as a flexible intermediary that can be routed through available spaces in the dashboard structure, enabling easy integration without requiring precise positioning of the light sensor near the outer surface, thus simplifying the manufacturing and installation process.
3Device complexity
If the light sensor is located far from the outer surface of the display, then the compactness of the display is improved, but the light collection efficiency decreases
Solution Approach 1:
The light pipe acts as an efficient light conduit that bridges the distance between the outer surface and the light sensor located deeper within the display structure. This intermediary component maintains high light collection efficiency even when the sensor is positioned far from the outer surface, enabling a more compact display design.
Solution Approach 2:
The patent utilizes the light pipe to redirect light along a different spatial path, effectively transferring light collection functionality from a two-dimensional surface proximity requirement to a three-dimensional routed pathway, allowing the sensor to be positioned deeper within the compact structure.
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
This design results in a more compact and easily adaptable display that can fit various vehicle configurations with simplified assembly.
Implementation Method 1
external light (representative the luminosity of the environment) is brought to the light sensor by the light pipe
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a display (1) comprising: - an image generation unit (2) comprising a light emitter and an auxiliary printed circuit board (22) on which the light emitter is mounted; - a control unit (4), configured to control the image generation unit, and a main printed circuit board (41), distinct from the auxiliary printed circuit board, the control unit being mounted on main printed circuit board; - a light sensor (5) adapted to provide to the control unit a signal representative of a light intensity received by the light sensor; - a light guide (6) configured to collect a light radiation and to guide the light radiation to the light sensor. According to the invention, the light sensor is mounted on the main printed circuit board and in that the light guide is a light pipe.