Backlight Unit Light Guide Plate Split Patterns
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Solution Overview
Problem
Current display technologies face challenges in converting a point light source into a surface light source efficiently, which is essential for achieving high-quality three-dimensional stereoscopic image display without the need for additional holographic or diffractive optical elements, while maintaining light coherence and minimizing the thickness of the backlight unit.
Innovation Solution
The implementation of a light guide plate with concentrically arranged split patterns that change the path of light emitted from a point light source, converting it into a surface light source without using separate holographic or diffractive optical elements, thereby maintaining light coherence and reducing the thickness of the backlight unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a point light source is used, then the thickness of the backlight unit is reduced, but the conversion into a surface light source becomes inefficient
Solution Approach 1:
The light guide plate is segmented with multiple reflection patterns (first reflection pattern, second reflection pattern, third reflection pattern) that divide and redirect light from the point light source to create a surface light source effect. This segmentation allows efficient light distribution across the display area while maintaining a thin backlight unit structure.
Solution Approach 2:
The invention transforms light propagation from a point source in three-dimensional space into a surface light source by utilizing the light guide plate's structure. The reflection patterns redirect light at different angles and positions, effectively converting a zero-dimensional point source into a two-dimensional surface light source without increasing the backlight unit's thickness.
2Reliability
If additional holographic or diffractive optical elements are used, then three-dimensional stereoscopic image display quality is improved, but the device complexity and thickness increase
Solution Approach 1:
The invention merges the functions of light guiding, light redistribution, and three-dimensional stereoscopic image display into a single light guide plate structure. The reflection patterns integrated into the light guide plate perform multiple functions simultaneously, eliminating the need for separate holographic or diffractive optical elements and reducing overall device complexity.
Solution Approach 2:
The light guide plate serves multiple functions: it guides light from the point light source, redistributes it to create a surface light source effect, and enables three-dimensional stereoscopic image display through its specific reflection patterns. This multi-functionality reduces the number of components needed while maintaining display quality.
3Reliability
If additional holographic or diffractive optical elements are used, then three-dimensional stereoscopic image display quality is improved, but the thickness of the backlight unit increases
Solution Approach 1:
The invention combines light guiding and three-dimensional display functions into a single integrated light guide plate structure. The reflection patterns are formed within the light guide plate itself, eliminating the need for additional separate optical elements that would increase the overall thickness of the backlight unit.
4Stability of the object's composition
If conventional light distribution methods are used, then light emission uniformity is improved, but light coherence is lost
Solution Approach 1:
The light guide plate uses segmented reflection patterns that redirect light in controlled segments rather than complete diffusion. This segmentation approach maintains light coherence by avoiding random scattering while still achieving uniform light emission across the display area through the coordinated action of multiple reflection patterns.
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 effectively converts a point light source into a surface light source, enhancing the uniformity and efficiency of light emission for three-dimensional stereoscopic displays while minimizing the thickness of the backlight unit and maintaining light coherence.
Implementation Method 1
a light guide plate with concentrically arranged split patterns that change the path of light emitted from a point light source
Data Source
Figure 1
Figure 2~3
Figure 4A
AI summary
A backlight unit includes: a light source unit including a point light source; and a light guide plate disposed on a path of light emitted from the light source unit, where a plurality of split patterns is defined in the light guide plate. The plurality of split patterns transmits a part of the light emitted from the light source unit and reflects a remaining part thereof, and the plurality of split patterns is concentrically arranged on the light guide plate and around the light source unit.