Beam Splitting Module for Multi-Image HUD Projection
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Solution Overview
Problem
Conventional Head-Up Displays (HUDs) in transportation vehicles are limited in their application as they primarily display vehicle speed, restricting the types of driving information that can be displayed, and require drivers to frequently look away from the road to access instrument panel information.
Innovation Solution
A beam splitting module comprising a projector and multiple reflective mirrors that project and reflect split images to form multiple projection images, allowing for the simultaneous display of various driving information such as speed, fuel level, and navigation on a windshield or virtual image, reducing the need for drivers to switch between near and far vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple types of driving information are displayed on the instrument panel, then the information completeness is improved, but the driver needs to frequently look downward which reduces safety
Solution Approach 1:
The patent projects driving information from the traditional horizontal instrument panel onto the vertical windshield surface, creating a head-up display that maintains information completeness while eliminating the need for drivers to look downward, thus resolving the contradiction between information completeness and driving safety
Solution Approach 2:
The patent introduces a beam splitting module with multiple reflective mirrors as an intermediary optical system between the projector and windshield, enabling multiple types of driving information to be simultaneously projected and displayed on the windshield, thereby achieving complete information display without compromising driver safety
2Device complexity
If a single projector displays all driving information, then the device complexity is reduced, but the image quality and clarity deteriorate
Solution Approach 1:
The patent divides the projection system into multiple independent projectors, each responsible for projecting a specific type of driving information through a separate optical path with dedicated reflective mirrors, which maintains high image quality for each information type while keeping each projector module relatively simple
Solution Approach 2:
The beam splitting module with multiple reflective mirrors serves as a universal optical component that can handle multiple projection beams simultaneously, allowing the system to display various types of driving information with high quality without requiring complex individual projector designs for each information type
3Adaptability or versatility
If multiple reflective mirrors are used to display multiple information types, then the information variety is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple reflective mirrors into an integrated beam splitting module that processes multiple projection beams simultaneously, allowing various types of driving information to be displayed through a unified optical system rather than separate independent systems, thus achieving information variety while controlling overall device complexity
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
Enables the simultaneous display of multiple driving information types on a HUD, enhancing driver convenience by reducing the frequency of looking away from the road and improving the clarity and arrangement of projected images through the use of a laser light source and optical refraction adjustments.
Implementation Method 1
The first reflective mirror reflects the first split image to form a first projection image. The second reflective mirror reflects the second split image to form a second projection image.
Data Source
AI summary
A beam splitting module and a projector device using the same are provided. The beam splitting module comprises a projector, a first reflective mirror and a second reflective mirror. The projector projects a first split image, a second split image and a third split image. The first reflective mirror reflects the first split image to a real image forming plate to form a first projection image. The second reflective mirror reflects the second split image to the real image forming plate to form a second projection image. The third split image is projected on the real image forming plate through a space between the first reflective mirror and the second reflective mirror to form a third projection image.