Blind Spot Display Optics for Curved Surface Matching
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Solution Overview
Problem
Existing blind spot display devices attached to curved obstacles often result in a shape difference between the display surface and the obstacle, degrading the design sense.
Innovation Solution
A blind spot display device with an incidence surface, a light guide member, a first reflecting surface, a second reflecting surface, and multiple prism portions, where external environment light beams enter the incidence surface, are guided by the light guide member, and emit toward a display region through the prism portions, with the apexes of the prism portions arranged in a three-dimensional manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the blind spot display device is attached to a curved obstacle, then the display function is achieved, but the shape difference between the display surface and the obstacle degrades the design sense
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement of prism portions to a three-dimensional arrangement where apexes are positioned at different depths along the optical path. This dimensional change allows the display surface to conform to curved obstacles while maintaining optical performance, resolving the contradiction between achieving display function on curved surfaces and maintaining shape consistency.
Solution Approach 2:
The patent changes the spatial parameters of the prism portions by arranging their apexes in three dimensions rather than on a single plane. This parameter change enables the display device to adapt to curved obstacle geometries while preserving the optical guidance function, thus resolving the shape consistency issue without sacrificing display capability.
2Device complexity
If the apexes of prism portions are arranged on a plane, then the structure is simple, but the curved appearance matching the obstacle is lost
Solution Approach 1:
The patent moves the prism apexes from a two-dimensional planar arrangement to a three-dimensional configuration along the optical path. This dimensional transition enables the display surface to exhibit curved appearance that matches obstacles while maintaining manageable structural complexity through systematic arrangement.
Solution Approach 2:
The patent introduces curvature to the prism arrangement by positioning apexes in three dimensions rather than on a flat plane. This curved arrangement allows the display surface to match the curved geometry of obstacles, resolving the contradiction between structural simplicity and curved appearance.
3Loss of information
If light beams are guided through multiple reflections, then the blind spot image is displayed, but light loss increases
Solution Approach 1:
The patent applies different surface properties to different regions of the light guide member. The first reflecting surface has high reflectivity to ensure effective blind spot image display through multiple reflections, while the second reflecting surface has lower reflectivity to minimize light loss. This local quality differentiation resolves the contradiction between display effectiveness and light loss.
Solution Approach 2:
The patent changes the reflectivity parameter along the optical path by using a first reflecting surface with high reflectivity near the incidence point and a second reflecting surface with lower reflectivity further along the path. This parameter variation optimizes the balance between achieving effective blind spot display and minimizing cumulative light loss.
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 device ensures a curved appearance of the display surface, improving the visual design effect by matching the shape of the obstacle, while maintaining effective light guidance and display.
Implementation Method 1
external environment light beams enter the incidence surface, reflect alternately on the first and second reflecting surface while passing through the light guide member
Implementation Method 2
external environment light beams enter the incidence surface, reflect alternately on the first and second reflecting surface while passing through the light guide member, and emits toward the display region through the prism portions
Data Source
AI summary
A blind spot display device displays an image of blind spot blocked by an obstacle, and includes an incidence surface, a light guide member, a first reflecting surface closed to a display region, a second reflecting surface close to the blind spot, and multiple prism portions protruding toward the display region. An external environment light beam enters the incidence surface, reflects alternately on the first and second reflecting surface while passing through the light guide member, and emits toward the display region through the prism portions. Apexes of the prism portions are arranged in a three dimensional manner not along a plane.