Dual-Prism Display Module for Wider Viewing and Higher Brightness
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Solution Overview
Problem
Existing head-up displays in transportation vehicles face limitations such as limited display area, low brightness, and restricted information display, making it difficult for drivers and passengers to read important information conveniently and safely.
Innovation Solution
A display module comprising a first prism layer with prismatic structures extending in one direction and a second prism layer with prismatic structures extending transversely, along with a display panel, configured to enhance light divergence and brightness by reflecting light through a transparent plate at an acute angle, allowing for wider viewing angles and enhanced brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional head-up display is used, then the display can be integrated into the vehicle, but the display area is excessively low and display brightness is excessively low
Solution Approach 1:
The patent introduces a dual-layer prism structure with first and second prismatic structures extending in different directions, transforming the light propagation from a single-dimensional path to a multi-dimensional path. This dimensional change enables light to be redirected at multiple angles, expanding the effective display area while maintaining high brightness through optimized light paths.
Solution Approach 2:
The display system is segmented into multiple functional layers including the first prism layer, second prism layer, and transparent plate. Each layer performs a specific function in light manipulation, allowing the display area to be expanded across different spatial zones while maintaining controlled brightness distribution through each segmented component.
2Area of stationary object
If the display area is increased, then more information can be displayed, but the display brightness becomes excessively low
Solution Approach 1:
The patent changes the optical parameters by introducing prismatic structures with specific geometric configurations that alter light propagation angles and paths. These parameter changes enable the system to maintain high brightness across an expanded display area by redirecting light efficiently through the multi-layer prism structure.
3Adaptability or versatility
If light is emitted in multiple directions to increase viewing angle, then the display area expands, but light loss increases due to rays passing through the transparent plate without reflection
Solution Approach 1:
The patent employs asymmetric prism structures where the first and second prismatic structures have different orientations and geometries. This asymmetry creates preferential light reflection paths that direct light toward the observation region while minimizing light loss through the transparent plate, thereby maintaining high viewing angles with reduced energy loss.
4Volume of moving object
If the display module is made compact to fit vehicle space constraints, then the device size is reduced, but the display area and brightness are limited
Solution Approach 1:
The patent implements a nested structure where the first prism layer and second prism layer are integrated within a compact display module assembly. The transparent plate serves as both a protective cover and an optical element, nesting multiple functions within a reduced volume while maintaining an expanded effective display area through the multi-layer light manipulation 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
The solution increases the amount of light biased in a preset direction, reduces light loss, and enhances the brightness and uniformity of the displayed image, enabling a wider viewing angle and improved display quality.
Implementation Method 1
a first prism layer, disposed on the backlight module and having a plurality of first prismatic structures extending along a first direction; a second prism layer, disposed on the first prism layer and having a plurality of second prismatic structures extending along a second direction transverse to the first direction
Implementation Method 2
At least part of image light rays emitted by the display panel reach the observation region by reflection by the transparent plate
Data Source
AI summary
The present invention provides a display module and a display system including the same. The display module includes: a backlight module; a first prism layer, disposed on the backlight module and having a plurality of first prismatic structures extending along a first direction; a second prism layer, disposed on the first prism layer and having a plurality of second prismatic structures extending along a second direction transverse to the first direction; and a display panel, disposed on the second prism layer. The first prismatic structure protrudes away from the backlight module and has a first prismatic section that is triangular on a virtual plane in which the normal direction is the first direction. The second prismatic structure protrudes away from the backlight module and has a second prismatic section that is triangular on a virtual plane in which the normal direction is the second direction. The vertex of the second prismatic section has a vertical projection onto a base edge of the second prismatic section which is offset along the first direction relative to a center of the base edge.