Backlight Light Guide Plate Crosstalk Reduction
Solution Overview
Problem
Current 3D image display technologies face challenges in minimizing crosstalk and achieving uniform luminance, particularly in autostereoscopic methods where multiple viewpoints are displayed, leading to suboptimal viewing experiences.
Innovation Solution
A backlight apparatus utilizing a light guide plate with a preset pattern where the height of sub-patterns varies from the light incident portion to the central portion, and the main pattern is configured to be inclined and shifted in crosstalk occurrence regions to minimize interference between different viewpoints, ensuring uniform luminance and reduced crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a light guide plate with uniform pattern height is used, then the manufacturing process is simple, but the luminance uniformity is poor and crosstalk occurs
Solution Approach 1:
The patent applies local quality by varying the height of sub-patterns in different regions of the light guide plate. Specifically, sub-patterns near the light source have different heights than those in the central region, allowing each region to be optimized for its specific function: light source regions control light extraction, while central regions minimize crosstalk and enhance luminance uniformity.
2Device complexity
If the main pattern is straight and uniformly spaced, then the structure is simple, but crosstalk occurs between adjacent viewpoints
Solution Approach 1:
The patent applies asymmetry by tilting the main pattern at a predetermined angle rather than using straight, uniformly spaced patterns. This asymmetric configuration effectively reduces crosstalk between adjacent viewpoints in autostereoscopic displays while maintaining a relatively simple overall structure.
3Ease of manufacture
If sub-patterns near the light source have the same height as central sub-patterns, then the pattern fabrication is easier, but light extraction efficiency is reduced
Solution Approach 1:
The patent applies local quality by varying the height of sub-patterns in different regions of the light guide plate. Specifically, sub-patterns near the light source have different heights than those in the central region, allowing each region to be optimized for its specific function: light source regions control light extraction, while central regions minimize crosstalk and enhance luminance uniformity.
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 solution effectively reduces crosstalk and enhances the uniformity of light emission for 3D image displays, improving the overall viewing experience by optimizing the pattern configuration of the light guide plate.
Implementation Method 1
a light guide plate disposed in a rear of the display panel and spaced apart from the display panel
Implementation Method 2
a height of a sub pattern disposed in a light incident portion of the light guide plate near the light source among a plurality of sub patterns constituting the main pattern is smaller than the height of a sub pattern disposed in a central portion of the light guide plate
Implementation Method 3
The main pattern may be inclined to a preset angle
Data Source
AI summary
A 3D image display apparatus includes a display panel configured to display a multiview image, a light guide plate disposed in a rear of the display panel and spaced apart from the display panel, a main pattern repeatedly formed and spaced at a preset interval, and a light source configured to irradiate light to the light guide plate. A height of a sub pattern disposed in a light incident portion of the light guide plate near the light source among sub patterns constituting the main pattern is smaller than that of a sub pattern disposed in a central portion of the light guide plate.