Beveled Light Guide Plate for Slim Edge Displays
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Solution Overview
Problem
Conventional backlights in information handling systems increase the size and thickness of displays due to their rectangular shape, making it difficult to achieve a slim edge design with minimal bezel areas, which hinders user interaction and portability.
Innovation Solution
A beveled light guide plate is integrated behind the display panel, with a reflective side that couples to a base and an illumination side with a larger perimeter, allowing the light guide plate to fit snugly into a housing that tapers from a support arm to a base, minimizing thickness and enabling a slim edge display with reduced assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional rectangular backlight is used, then illumination coverage is ensured, but display thickness increases
Solution Approach 1:
The light guide plate transitions from a conventional rectangular prism to a frustum shape with tapered sides, utilizing the dimensional change to reduce thickness at the edges while maintaining adequate illumination area. The beveled side surfaces allow the backlight to fit within a thinner profile without compromising light distribution across the display panel.
2Illumination intensity
If a conventional rectangular backlight is used, then illumination uniformity is maintained, but bezel size increases
Solution Approach 1:
The light guide plate employs different geometric characteristics at different locations: the top surface maintains a larger area for uniform light emission, while the side surfaces are beveled to taper toward the base. This local differentiation allows the backlight to provide consistent illumination across the display while occupying less overall space, thereby reducing bezel dimensions.
3Volume of moving object
If the housing is made compact, then portability is improved, but assembly complexity increases
Solution Approach 1:
The beveled light guide plate is integrated directly into the housing structure, with its tapered sides fitting against the sloped interior walls. This merging of the backlight assembly with the housing eliminates the need for separate mounting brackets or complex positioning mechanisms, simplifying assembly while achieving a compact form factor.
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 design results in a sleek and thin display with a minimized bezel size or even a zero-edge perimeter, ensuring efficient light distribution for high-quality image presentation while maintaining a slim edge and reduced thickness.
Implementation Method 1
The light guide plate receives the illumination and, through reflective surfaces and openings, distributes the illumination evenly across the back of the LCD panel
Implementation Method 2
distributes the illumination evenly across the back of the LCD panel
Data Source
AI summary
A display couples a display panel over a light guide plate in a sharp edge housing by adapting the light guide plate side to have a beveled surface that fits along its perimeter into a reduced depth of the housing. The light guide plate beveled surface has angled sides relative to the light guide plate illumination side and reflective side to fit against parallel sides formed in the housing as the housing narrows towards its base where the light guide plate couples. A diffusive pattern formed in the light guide plate reflective surface that directs light towards the illumination surface extends onto the light guide plate side beveled surface.