Light Guide Plate Reflecting Dots for Eye Point Visibility
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Solution Overview
Problem
Existing display devices using light guide plates and reflecting dots struggle to provide clear visibility of display patterns outside the viewer's eye point, limiting the recognition of larger patterns or multiple patterns without changing the viewer's position.
Innovation Solution
The display device adjusts the reflecting direction of light from reflecting dots on a light guide plate to direct reflected light towards a specific eye point, using multiple light sources and strategically oriented reflecting surfaces to ensure visibility of display patterns at specific eye points, even for larger patterns or those positioned away from the viewer's eye width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the emission direction of light reflected by the reflecting dots is controlled to become orthogonal to the front surface of the light guide plate, then the display pattern can be formed on the front surface side, but the display pattern becomes difficult to visually recognize for regions outside the viewer's eye point
Solution Approach 1:
The patent applies local quality by setting different emission directions for light reflected by reflecting dots in different regions of the light guide plate. Specifically, the emission direction is adjusted according to the position relative to the viewer's eye point, with reflecting dots in regions outside the eye point having their emission directions tilted toward the eye point to ensure visibility while maintaining orthogonal emission for other regions
2Device complexity
If the reflecting dots are oriented perpendicular to the light incidence direction, then the light reflection and emission control is simplified, but the display pattern visibility is limited to the eye width of the viewer
Solution Approach 1:
The patent applies dynamics by making the emission direction of reflected light variable rather than fixed. The emission direction is dynamically adjusted based on the viewer's eye point position, allowing the display to adapt to different viewing positions and expand the visible area beyond the fixed eye width limitation
3Loss of information
If multiple display patterns are displayed on the light guide plate surface, then the information display capability is improved, but the visibility of multiple patterns at positions away from the eye width is reduced
Solution Approach 1:
The patent applies local quality by assigning different emission direction characteristics to reflecting dots corresponding to different display patterns based on their positional relationship with the eye point. This allows each display pattern to be optimized for visibility from the eye point, enabling multiple patterns to be simultaneously visible even at positions away from the eye width
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 solution enhances the visibility of display patterns at specific eye points, allowing for the recognition of larger patterns and multiple patterns without requiring the viewer to change their position, by accurately controlling light distribution and reflection directions.
Implementation Method 1
a display pattern formed by a plurality of reflecting dots is displayed by emitting the light reflected by the plurality of reflecting dots to an outside from a front surface side of the light guide plate
Data Source
AI summary
A display device includes a light guide plate that includes a plurality of reflecting dots; and a light source, wherein light emitted from the light source enters inside of the light guide plate from the end surface of the light guide plate and the light is guided inside of the light guiding plate, a display pattern formed by the plurality of reflecting dots is displayed by emitting the light reflected by the plurality of reflecting dots to an outside from a front surface side of the light guide plate, and each of the reflecting dots are formed such that a reflecting direction of the light, that is reflected by the reflecting dots, with respect to an incidence direction of the light, that enters the reflecting dots, is adjusted so that the light reflected by the plurality of reflecting dots is emitted toward a specific eye point of a viewer.