Shape-Memory Alloy Light Cover for LED Leakage
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Solution Overview
Problem
Information handling systems face challenges in effectively blocking light leakage from LEDs due to mechanical deformation caused by high temperatures, leading to potential damage and inefficient light containment.
Innovation Solution
A light cover made of a semi-rigid shape-memory alloy that changes shape in response to temperature, forming a minimized gap to block light when heated and a widened gap for safe installation when cooled, using a blocking portion that extends vertically with the optical sheet and mounting pegs for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light cover is made of a rigid material to effectively block light leakage, then light containment is improved, but mechanical deformation occurs due to high temperatures causing installation damage
Solution Approach 1:
The patent applies shape-memory alloy material that changes its physical parameters (shape, rigidity) in response to temperature changes. At high temperatures, the alloy maintains a first shape configuration that provides effective light blocking, while at low temperatures, it transitions to a second shape configuration that enables safe installation without thermal deformation damage.
Solution Approach 2:
The light cover employs a dynamic shape-memory alloy structure that can dynamically change its shape between two configurations based on temperature conditions. This dynamic adaptation allows the blocking portion to extend vertically for optimal light containment during operation while retracting or deforming during installation to avoid damage from thermal contact.
2Reliability
If the blocking portion extends vertically close to the optical sheet to minimize gaps and block light, then light leakage is reduced, but the optical sheet may be scratched during installation
Solution Approach 1:
The blocking portion is designed with dynamic shape-changing capability through shape-memory alloy. During installation (cool state), it adopts a second shape configuration that widens the gap between the blocking portion and optical sheet, preventing scratches. During operation (heated state), it transitions to a first shape configuration that minimizes the gap to less than 0.2 millimeters, effectively blocking light leakage.
Solution Approach 2:
The patent implements preliminary shape configuration where the blocking portion is pre-formed to extend vertically in parallel with the optical sheet at high temperatures. This preliminary positioning ensures optimal light blocking is achieved automatically when the system operates, while the low-temperature shape provides installation protection.
3Ease of operation
If the light cover structure is simplified for easy installation, then ease of operation is improved, but light blocking effectiveness may be compromised
Solution Approach 1:
The light cover utilizes the self-service property of shape-memory alloy that automatically transitions between shapes based on temperature conditions without external control. The alloy inherently knows when to adopt the installation-friendly second shape (cool) and when to adopt the light-blocking first shape (heated), eliminating the need for complex control mechanisms while maintaining both installation ease and light containment effectiveness.
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 cover effectively blocks light leakage by maintaining its shape at high temperatures and allows safe installation without damaging the optical sheet, ensuring reliable light containment and preventing mechanical deformation.
Implementation Method 1
the blocking portion having a first shape associated with a heated state in which the blocking portion extends vertically in parallel with a lower portion of an optical sheet... a second shape associated with cooled state in which the blocking portion extends diagonally away from the lower portion of the optical sheet
Data Source
AI summary
Systems and methods are disclosed for a light cover that may include a blocking portion configured to block a light emitted from a light-emitting diode, the blocking portion having a first shape associated with a heated state in which the blocking portion extends vertically in parallel with a lower portion of an optical sheet, the first shape configured to minimize a gap between the lower portion of the optical sheet and the blocking portion; a mounting portion configured to contact a bottom portion of a cover bottom of the display, the mounting portion extending orthogonally from the blocking portion; and a plurality of mounting pegs disposed on interior portions of the mounting portion, each of the plurality of mounting pegs configured to removably couple the mounting portion of the light cover to the bottom portion of the cover bottom.