Head-Up Display Angle Adjuster for Compact Optical Path
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Solution Overview
Problem
Current head-up display devices using double-layer implementations with TFT-LCDs or DLP+TFT-LCD technologies face issues with power consumption, volume, brightness, and cost effectiveness.
Innovation Solution
A head-up display device comprising a light source, scanner, angle adjuster, display unit, and projection assembly, where the angle adjuster enlarges the exit angle of scanned light to shorten the optical path, avoiding image overlap and reducing device volume, and includes multiple display sub-units with different distances and sizes, along with a MEMS mirror and laser light sources for efficient image projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If double-layer display with TFT-LCDs or DLP+TFT-LCD is used, then image projection capability is achieved, but device volume increases
Solution Approach 1:
The display system is segmented into independent display sub-units, each capable of independent image projection. This allows the system to achieve complex display functionality while maintaining a compact overall structure by distributing functions across multiple smaller components rather than using a single large complex display unit.
Solution Approach 2:
The patent utilizes spatial arrangement in three-dimensional space by positioning multiple display sub-units at different distances from the scanner. This dimensional arrangement allows images to be projected at different depths without increasing the footprint of the device, effectively reducing device volume while maintaining projection capability.
2Use of energy by moving object
If conventional display components are used, then image projection is achieved, but power consumption increases
Solution Approach 1:
The patent replaces conventional mechanical display components (TFT-LCDs, DLP) with a laser-based optical system. The laser light source combined with scanner and display sub-units creates a more energy-efficient image projection mechanism that consumes less power while maintaining or improving projection efficiency.
Solution Approach 2:
The system uses laser light sources which can be precisely controlled in terms of intensity, wavelength, and timing. By optimizing these parameters, the system achieves high image projection efficiency with reduced power consumption compared to conventional display components that operate at fixed performance levels.
3Illumination intensity
If conventional display components are used, then image projection is achieved, but brightness is reduced
Solution Approach 1:
The laser-based optical system replaces conventional display components, providing superior brightness through the inherent intensity and coherence of laser light. This substitution achieves higher illumination intensity while actually reducing overall power consumption, resolving the contradiction between brightness and energy use.
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 reduces the volume of the head-up display device while maintaining effective image projection, enhancing convenience and safety for drivers by displaying critical information on a windshield without overlapping images.
Implementation Method 1
a scanner configured to scan light emitted from the light source to form scanned light
Implementation Method 2
an angle adjuster configured to change an exit angle of the scanned light
Implementation Method 3
the collimator is configured to converge and collimate a light beam emitted from the light source
Implementation Method 4
the scanner includes a MEMS mirror
Implementation Method 5
the light source includes a laser light source
Implementation Method 6
each of the plurality of display sub-units includes a diffuser plate
Data Source
AI summary
A head-up display device and a transportation device are provided. The head-up display device includes a light source, a scanner configured to scan light emitted from the light source to form scanned light, an angle adjuster configured to change an exit angle of the scanned light, a display unit configured to form an image according to the scanned light from the angle adjuster, and a projection assembly configured to project the image formed on the display component to a selected area.