3D Display Module Depth of Field Control
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Solution Overview
Problem
Current augmented-reality heads-up displays (AR-HUD) struggle to rapidly and accurately control the depth of field of display images, which is crucial for effective labeling under changing traffic conditions.
Innovation Solution
A three-dimensional display module integrating light-emitting elements and a liquid-crystal layer, where a drive unit powers the light-emitting elements to produce images and generates an electric field to adjust the focal length of the liquid-crystal layer, enabling rapid and accurate control of the depth of field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional AR-HUD is used, then basic display function is provided, but depth of field control is slow and inaccurate
Solution Approach 1:
The patent combines the display function (light-emitting elements) and depth of field control function (liquid-crystal layer) into a single integrated module. The light-emitting elements generate display images while the liquid-crystal layer simultaneously adjusts the focal length, enabling both functions to work together in one compact system rather than separate components.
Solution Approach 2:
The patent changes the physical state of the liquid-crystal layer by applying voltage to alter its focal length. The drive unit applies different voltages to the liquid-crystal layer, causing it to transition between different focal lengths, which enables rapid and accurate depth of field control for augmented reality labeling.
2Adaptability or versatility
If AR-HUD is used for augmented reality display, then driver information is provided, but labeling effectiveness fails under changing traffic conditions
Solution Approach 1:
The patent makes the display system dynamic by enabling real-time adjustment of the liquid-crystal layer's focal length. The drive unit can rapidly change the focal length in response to varying traffic conditions, allowing the system to adapt its depth of field control dynamically rather than being fixed, thereby maintaining labeling effectiveness in changing environments.
3Productivity
If light-emitting elements and liquid-crystal layer are integrated, then rapid depth of field control is achieved, but device structure becomes more complex
Solution Approach 1:
The drive unit serves multiple functions: it drives the light-emitting elements to emit light for image formation and simultaneously drives the liquid-crystal layer to change focal length. This multi-functionality reduces the need for separate control mechanisms, offsetting the structural complexity with functional integration.
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 allows for the generation of virtual images with varying depths of field, enhancing the display effect of augmented reality by adapting to changing environments while driving, thereby improving safety and convenience.
Implementation Method 1
the drive unit drives each of the second electrodes and the second electrode layer to produce an electric field at the liquid-crystal layer to change the focal length of the liquid-crystal layer
Implementation Method 2
the drive unit drives each of the first electrodes and the first electrode layer to provide power to each of the light-emitting elements such that the light-emitting elements emit light passing through the liquid-crystal layer to form a display image
Data Source
AI summary
A three-dimensional display module includes a substrate, a display layer, a first electrode layer, a liquid-crystal layer, a second electrode layer, and a drive unit. The substrate has first electrodes and second electrodes. The display layer is disposed on the substrate and includes light-emitting elements. The first electrode layer is disposed on the display layer. The liquid-crystal layer is disposed on the display layer. The second electrode layer is disposed on the liquid-crystal layer. The drive unit drives the first electrodes and the first electrode layer to supply power to the light-emitting elements, such that the light-emitting elements generate light passing through the liquid-crystal layer to form a display image. The drive unit drives the second electrodes and the second electrode layer to produce an electric field on the liquid-crystal layer to change focal length of the liquid-crystal layer so as to control depth of field of the display image.