HUD Display Device Light Condensing Isolation
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Solution Overview
Problem
Conventional display devices, such as HUDs, face challenges in achieving brightness and image quality while minimizing the adverse effects of external light, particularly sunlight, which can damage components and reduce light use efficiency due to the condensing properties of light condensing elements like concave mirrors.
Innovation Solution
The display device incorporates a microlens array with specific diffusion characteristics as a diffusion plate, positioned to diffuse image light at a controlled divergence angle, and ensures that components are not located in the light condensing portion to prevent temperature rises, using a configuration where the light condensing portion of external light is isolated from critical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a microlens array with specific optical characteristics is used as the screen to achieve brightness and improve image quality, then brightness and image quality are improved, but the light condensing property of external light reflected by the concave mirror is promoted
Solution Approach 1:
The patent extracts and isolates the harmful light condensing function from the useful image formation function. By positioning the light condensing portion at a location separate from critical components, the harmful effect of external light condensation is removed from the component vicinity while preserving the microlens array's brightness-enhancing diffusion characteristics.
Solution Approach 2:
The patent introduces an intermediary spatial arrangement between the optical elements and the light condensing portion. By strategically positioning components away from the light condensing portion, an intermediate zone is created that prevents direct exposure to condensed external light while maintaining the optical pathway for image formation.
2Device complexity
If components are positioned near the light condensing portion to optimize optical path, then device compactness is improved, but temperature of components rises and component damage may occur
Solution Approach 1:
The patent extracts the light condensing function from the component assembly area. By designing the optical system such that the light condensing portion is spatially separated from critical components, the harmful thermal effect is removed from the component environment while maintaining efficient light guidance for image formation.
Solution Approach 2:
The patent resolves the spatial conflict by transitioning to a three-dimensional spatial arrangement. Instead of arranging components in a compact planar configuration, the design utilizes vertical and depth dimensions to position components away from the light condensing portion, achieving both compactness and thermal protection.
3Use of energy by moving object
If diffusion angle of the screen is increased to improve brightness, then light use efficiency is improved, but light condensing property of external light is enhanced
Solution Approach 1:
The patent extracts the harmful light condensation effect from the useful light diffusion function. By carefully designing the microlens array parameters and positioning the light condensing portion away from components, the beneficial light diffusion for brightness is maintained while the harmful external light condensation is isolated and prevented from damaging components.
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 approach enhances image quality and brightness while reducing the influence of external light, preventing component damage and maintaining high reliability and safety by strategically positioning components to avoid the light condensing area.
Implementation Method 1
a diffusion plate configured to diffuse the image light
Implementation Method 2
a light condensing element to receive and condense the image light diffused by the diffusion plate
Implementation Method 3
a second concave mirror that reflects light emitted from the first concave mirror to a windshield
Implementation Method 4
external light is condensed in the device by the light condensing element
Data Source
AI summary
A display device and an apparatus. The display device includes light emitter to emit light, an image generator to generate image light using the light emitted from the light emitter, a diffusion plate configured to diffuse the image light, and a light condensing element to receive and condense the image light diffused by the diffusion plate. A component in an optical path between the light emitter and the diffusion plate is disposed at a position different from a position of a light condensing portion of external light having transmitted through the diffusion plate via the light condensing element. The apparatus includes a light emitter to emit light, an image generator to generate image light using the light emitted from the light emitter, a diffusion plate to diffuse the image light, and a concave mirror to reflect the image light diffused by the diffusion plate to a transmission reflection member.