Light Guide System for Perceived Display Area Expansion
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Solution Overview
Problem
Existing display devices in motor vehicles face challenges in extending the display area while minimizing screen dimensions and improving ergonomics without increasing costs, as larger screens are costly and existing solutions do not effectively enhance user interaction.
Innovation Solution
Incorporating a light guide system with a first portion outside the peripheral edge producing lateral illumination and a second portion extending inside to create an auxiliary illumination beam within the display window, enhancing perceived screen size and ergonomics through customizable lighting effects and depth simulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display screen diagonal is increased to extend the display area, then the display area is improved, but the cost of the display device increases
Solution Approach 1:
The patent extends the display area by utilizing the third dimension (depth) through light guides that create virtual image planes beyond the physical screen boundaries. Light guides with refractive indices between 1.3 and 1.7 generate lateral and auxiliary illumination beams that form virtual images, effectively expanding the perceived display area without increasing the physical screen diagonal or cost.
2Ease of operation
If the display screen diagonal is increased to improve ergonomics, then the ergonomics is improved, but the cost of the display device increases
Solution Approach 1:
The patent creates virtual copies of the display content through light guides that generate lateral and auxiliary illumination beams. These light guides produce virtual images that appear to extend beyond the physical screen, providing enhanced ergonomics and user interaction without requiring a larger physical display screen, thereby avoiding increased costs.
3Area of moving object
If light guides are added to extend the display area, then the perceived display area is improved, but the device complexity increases
Solution Approach 1:
The patent integrates light guides directly into the housing structure, merging the illumination function with the structural housing. The light guides are positioned within the housing and work in conjunction with the display screen to create extended virtual images, combining multiple functions into a unified structure rather than adding separate complex 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
The light guide system effectively enlarges the perceived display area, improves ergonomics by making functions easier to locate, and achieves these enhancements at a lower cost by maintaining the electronic screen size, offering a variety of lighting effects and depth simulation.
Implementation Method 1
the light guide comprising: a first portion which is arranged outside the peripheral edge and which produces a lateral beam of illumination outside the peripheral edge, and a second portion which extends in the extension of the first portion, facing vis the display window, and which produces an auxiliary beam of illumination in the display window
Implementation Method 2
the light guide is made by molding with the adjacent wall of the casing
Data Source
Figure 1~2
AI summary
The invention relates to a display device (10) comprising a casing (12) containing a display screen (14) arranged facing a display window (18) defined by a peripheral edge (20). The device is characterised in that the casing (12) is provided with at least one light guide (32, 34) associated with at least one light source (36, 38), said light guide (32, 34) comprising: a first portion (40) which is arranged outside the peripheral edge (20) and which produces a side illumination beam (F1) outside the peripheral edge (20); and a second portion (42) which extends from the first portion (40), facing the display window (18), and which produces an auxiliary illumination beam (F2) in the display window (18).