Vehicular Display Light Guide Body Hiding Light Source
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Solution Overview
Problem
The existing vehicular display devices have a configuration that allows direct visual recognition of the image display surface of the liquid crystal display panel, which affects the appearance of the device and requires improvement.
Innovation Solution
A vehicular display device is designed with a liquid crystal display panel, a display board, a light source, and a light guide body that includes a light-receiving part between the display board and the overlapping region of the image display surface, and a light-emitting part that emits light outwardly, preventing direct visual recognition of the light source by the driver and enhancing the appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a transmission part is disposed at a periphery of the display board to emit light received from the light source, then light can be transmitted and displayed, but the driver can directly visually recognize the image display surface of the liquid crystal display panel through the transmission part, resulting in poor appearance
Solution Approach 1:
A light guide body is introduced as an intermediary component between the light source and the transmission part. The light guide body receives light from the light source and guides it to the transmission part, preventing direct visual recognition of the light source while maintaining light transmission functionality. This mediator structure improves appearance by hiding the light source behind the display board.
Solution Approach 2:
The light guide body extends in the depth direction (rearward direction) behind the display board, utilizing the third dimension to position the light-receiving part rearward of the display board. This dimensional arrangement allows the light source to be positioned behind the display board while still transmitting light to the front, thereby improving appearance without sacrificing functionality.
2Shape
If the light-receiving part is disposed between the display board and the overlapping region, then direct visual recognition of the light source is suppressed, but the device configuration becomes more complex
Solution Approach 1:
The light guide body serves multiple functions simultaneously: it acts as a light-receiving structure, a light-guiding medium, and an appearance-improving element that hides the light source. By consolidating these functions into a single component, the overall device complexity is minimized while achieving the desired appearance improvement.
Solution Approach 2:
The light guide body merges the light-receiving function with the structural element that improves appearance. Instead of adding separate components for light reception and appearance improvement, the light guide body combines both functions, reducing the number of parts and simplifying the overall device configuration.
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 configuration suppresses direct visual recognition of the light source, resulting in a vehicular display device with improved appearance and a sense of unity between the display boards and the liquid crystal display panel, while simplifying the device configuration and creating a three-dimensional effect.
Implementation Method 1
a light guide body configured to emit light received through the liquid crystal display panel from the light source
Data Source
AI summary
A vehicular display device includes: a display board for displaying a scale; a liquid crystal display panel including an image display surface for displaying an image, and having an overlapping region in which the image display surface overlaps the display board further rearward than the display board; a light source for illuminating the liquid crystal display panel; and a first light guide body for receiving light from the light source via the liquid crystal display panel and emitting the light. The first light guide body includes: a light receiving part disposed between the overlapping region of the image display surface and the display board, for receiving the light from the light source via the liquid crystal display panel; and a light-emitting part exposed outwardly from the display board as viewed by a viewer, for emitting light from the first light guide body that is received by the light-receiving part.