Head-Up Display Blind Cover With Integrated Light Shielding
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Solution Overview
Problem
The provision of multiple light-shielding portions in head-up displays requires individual processing such as printing or surface texturing for each member, leading to increased costs.
Innovation Solution
A head-up display design incorporating a blind cover formed as an integral member with integrated light-shielding portions, including a first light-shielding portion to block deviating display light and a second light-shielding portion to prevent outside light entry, while using a single processing step for the blind cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate light-shielding portions are provided in the head-up display, then the display quality is improved by preventing light deviation and outside light entry, but the manufacturing cost increases due to individual processing requirements for each member
Solution Approach 1:
The patent combines multiple light-shielding portions (first light-shielding portion near the liquid crystal display element and second light-shielding portion near the window portion) into a single integrated light-shielding member. This merging eliminates the need for separate processing of multiple independent components, thereby reducing manufacturing costs while maintaining the dual function of preventing display light deviation and blocking outside light entry to preserve display quality.
Solution Approach 2:
The integrated light-shielding member performs multiple functions simultaneously: it acts as both the first light-shielding portion to prevent display light from reaching the cover glass via unintended optical paths, and the second light-shielding portion (light-shielding wall) to block outside light from entering the liquid crystal display. This multi-functionality reduces the total number of components and processing steps required.
2Reliability
If multiple separate light-shielding members are used, then comprehensive light shielding is achieved, but the assembly complexity and processing steps increase
Solution Approach 1:
The patent integrates multiple light-shielding functions into a single light-shielding member that includes both the first light-shielding portion and the second light-shielding portion (light-shielding wall). This integration reduces assembly complexity by eliminating the need to assemble and align multiple separate light-shielding components, while maintaining comprehensive light shielding effectiveness through the coordinated design of its multiple functional portions.
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 design allows for multiple light-shielding in head-up displays without significantly increasing costs by reducing the need for multiple processing steps and assembly complexity.
Implementation Method 1
a plane mirror that reflects display light from the display device
Implementation Method 2
a concave mirror that reflects the display light having passed the plane mirror
Data Source
AI summary
To provide a head-up display that can provide light-shielding portions at a plurality of locations while controlling costs. Provided is a head-up display comprising: a display device that displays images; a plane mirror that reflects display light from the display device; a concave mirror that reflects display light via the plane mirror; a cover glass that allows display light to pass through the concave mirror; and a blind cover formed as an integral member, a virtual image being displayed by using the display light projected on an object from the display device via a prescribed optical path through the plane mirror, the concave mirror, and the cover glass, wherein the blind cover is provided with a first light-shielding portion that blocks the display light that deviates from the prescribed light path from the display device to the plane mirror, a second light-shielding portion that suppresses external light passing through the cover glass from entering the inside, and an attachment portion that attaches the plane mirror to the blind cover.