Head-Up Display Solid-State Light Source for Narrow Dashboards
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Solution Overview
Problem
Existing head-up display devices struggle to achieve high brightness and contrast ratios, particularly in narrow dashboard installations, due to the difficulty in accommodating large light sources needed for sufficient brightness, especially under external light conditions.
Innovation Solution
A head-up display device utilizing a solid-state light source device with light-emitting cells that mix and reflect light, combined with a transparent screen to project information directly into the driver's field of view, ensuring excellent visibility and contrast even in bright conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large-sized light source is used to secure sufficient brightness, then brightness and contrast ratio are improved, but the device cannot be installed in a narrow dashboard
Solution Approach 1:
The patent changes the fundamental parameter of the light source from traditional large-sized lamps to solid-state light-emitting cells, enabling compact size while maintaining or improving brightness through efficient light mixing and reflecting structures
Solution Approach 2:
The patent implements a nested structure where light-emitting cells are arranged within a compact housing, with light mixing chambers and reflecting surfaces nested inside, allowing the entire light source assembly to fit within narrow dashboard spaces while providing sufficient brightness
2Illumination intensity
If a solid-state light source device with light mixing and reflecting structures is used, then brightness and contrast are improved in narrow spaces, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the solid-state light source assembly: light emission, light mixing, and light reflecting are integrated into a single compact unit, reducing overall system complexity while achieving improved brightness and contrast in narrow dashboard installations
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 enables a head-up display device that can be installed in narrow dashboards, providing sufficient brightness and contrast while maintaining excellent visibility under external light, enhancing driver safety with improved visibility of projected information.
Implementation Method 1
a solid-state light source device that reflects and mixes light emitted from a plurality of light-emitting cells and emits the light obtained by the mixing in a predetermined direction
Implementation Method 2
a solid-state light source device that reflects and mixes light emitted from a plurality of light-emitting cells and emits the light obtained by the mixing
Implementation Method 3
a transparent screen that is arranged in a part of the field of view of the operator, and transmit light from the field of view and reflects projection light from the video display device
Implementation Method 4
a transparent screen that is arranged in a part of the field of view of the operator, and transmit light from the field of view and reflects projection light from the video display device
Data Source
AI summary
A head-up display device that displays information including a video in a part of a field of view of an operator (407) includes a video display device (420) that is arranged at a position deviated from the field of view of the operator and generates and projects video light for projecting the information and a transparent screen (410) that is arranged in a part of the field of view of the operator, and transmit light from the field of view and reflects projection light from the video display device in a direction of the operator. A solid-state light source device (421) that reflects and mixes light emitted from a plurality of light-emitting cells (40) and emits the light obtained by the mixing in a predetermined direction is used as a light source constituting the video display device.