HUD Light Converging Elements Multi-Plane Stacking
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Solution Overview
Problem
Conventional head-up displays suffer from insufficient brightness at the intersection regions of adjacent light emitting unit rows, leading to non-uniform display due to the divergence of the image beam and the need for increased volume of curved surface reflectors.
Innovation Solution
The display module incorporates light emitting units with light converging elements arranged in a specific configuration, where the light converging elements of different rows are spaced apart and in contact with each other, reducing the gap between them to increase the overlap area on the display panel, thereby enhancing brightness at the intersection regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If light converging elements are disposed between display panel and light sources to decrease beam divergence, then beam divergence is reduced, but brightness at edge regions becomes insufficient causing non-uniform display
Solution Approach 1:
The patent transitions from a single-plane arrangement of light emitting units to a multi-level three-dimensional configuration. By stacking light emitting units across multiple planes (first plane, second plane, third plane) at different heights, the system increases the overlap area of illuminating beams on the display panel, thereby improving brightness uniformity while maintaining beam convergence.
2Reliability
If curved surface reflectors are increased in volume to receive divergent image beams, then beam reception is improved, but head up display volume increases
Solution Approach 1:
The patent utilizes vertical stacking of light emitting units across multiple planes to increase beam overlap area, thereby improving display uniformity without requiring larger curved surface reflectors. This multi-level configuration efficiently uses vertical space rather than expanding horizontal volume.
Solution Approach 2:
The light emitting units are arranged in a nested multi-plane configuration where units on different planes are positioned to create overlapping beam paths. This nested arrangement maximizes the utilization of spatial volume, allowing multiple light sources to contribute to the same display region without requiring proportional increases in overall system volume.
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 configuration improves the brightness and uniformity of the display by increasing the overlap area of illuminating beams on the display panel, addressing the issue of poor display quality caused by insufficient brightness at the intersection regions.
Implementation Method 1
The light converging element is disposed in a transmitting path of the illuminating beam... including a bottom surface adjacent to the light source, a top surface far away from the light source and opposite to the bottom surface
Data Source
AI summary
A display module including light emitting units and a display panel is provided. Each of the light emitting units includes a light source and a light converging element. The light emitting units are divided into at least one first light emitting unit row and a second light emitting unit row adjacent to the first light emitting unit row. Top surfaces of the light converging elements of the first light emitting unit row are disposed on a first surface. Top surfaces of the light converging elements of the second light emitting unit row are disposed on a second surface. The first surface is located between the display panel and the second surface. Moreover, a head up display including the display module is also provided.