HUD Microstructure Layer Deflects Light Away from Normal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional HUD architectures for transport vehicles suffer from low brightness, reflection interference from vehicle mirrors, and inadequate consideration of vehicle body design, resulting in suboptimal display effects.
Innovation Solution
The proposed HUD architecture includes a transport vehicle front windshield structure and a display apparatus without an optical film, featuring a microstructure layer with inclined microstructures that deflect light away from the normal, enhancing brightness and reducing reflection interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional HUD architecture with optical film is used to concentrate light toward normal of display surface, then light concentration is improved, but brightness is reduced and reflection interference increases
Solution Approach 1:
The patent inverts the conventional optical approach by removing the optical film that concentrates light toward the normal direction. Instead, it uses a microstructure layer that deflects light away from the normal direction, achieving the opposite effect of conventional designs to resolve the contradiction between light concentration and brightness enhancement.
Solution Approach 2:
The patent changes the light emission parameter from concentrated (toward normal) to deflected (away from normal) by introducing a microstructure layer with specific geometric parameters. This parameter change transforms the optical behavior to simultaneously improve brightness and reduce reflection interference.
2Illumination intensity
If display apparatus emits light in concentrated direction toward normal of display surface, then light directionality is improved, but brightness and display effect deteriorate
Solution Approach 1:
The patent extracts and removes the optical film from the display apparatus structure. By taking out this component that causes light concentration toward the normal direction, the system achieves improved brightness and reduced reflection interference while simplifying the device structure.
Solution Approach 2:
The patent introduces a microstructure layer as an intermediary between the display surface and the external environment. This intermediary layer performs the function of light deflection without requiring complex optical films, thereby improving brightness while maintaining structural simplicity.
3Adaptability or versatility
If conventional HUD architecture is used without considering vehicle body design, then device compatibility is improved, but overall display effect and integration deteriorate
Solution Approach 1:
The patent designs the display apparatus with a microstructure layer that serves multiple functions: it deflects light to improve brightness, reduces reflection interference, and integrates with various vehicle body designs. This multi-functional design enhances both display effect and vehicle body adaptability.
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 solution significantly increases the brightness of the HUD image by at least 3000% and improves the display effect by minimizing reflection interference from vehicle mirrors and optimizing the design for the vehicle body.
Implementation Method 1
each of the microstructures includes a bottom portion, a top portion, a first side surface, and a second side surface. The bottom portion is parallel to the display surface. The top portion is located above the bottom portion. The first side surface is inclined toward a driver from bottom to top
Implementation Method 2
Image light is emitted by the display apparatus toward the transport vehicle front windshield structure in a propagation direction and reflected to an ocular point of a driver
Implementation Method 3
Image light is emitted by the display apparatus toward the transport vehicle front windshield structure in a propagation direction and reflected to an ocular point of a driver
Implementation Method 4
Image light is emitted by the display apparatus toward the transport vehicle front windshield structure in a propagation direction and reflected to an ocular point of a driver on the side of the transport vehicle front windshield structure facing the interior of the transport vehicle
Data Source
AI summary
Disclosed is a head-up display (HUD) architecture for a transport vehicle, including a transport vehicle front windshield structure and a display apparatus. The display apparatus is arranged on a side of the transport vehicle front windshield structure facing an interior of the transport vehicle and includes a display surface facing the transport vehicle front windshield structure. Image light is emitted by the display apparatus toward the transport vehicle front windshield structure in a propagation direction and reflected to an ocular point of a driver on the side of the transport vehicle front windshield structure facing the interior of the transport vehicle. A light emitting angle is defined between the propagation direction and a normal direction of the display surface. A peak value of intensity distribution of the light emitting angle is located outside the normal direction of the display surface.