Flexible Backlight Carrier for Display Thermal Expansion
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Solution Overview
Problem
Thermal expansion of light guide plates in display modules causes significant displacement relative to light sources, leading to misalignment and potential light leakage or distortion, especially across varying operating temperatures.
Innovation Solution
A flexible backlight illumination carrier with flexures, such as springs, is used to secure light sources, allowing for spacing adjustments as the light guide plate expands or contracts, maintaining alignment with optical input terminals across temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid structure is used to secure light sources, then manufacturing precision is improved, but adaptability to thermal expansion deteriorates
Solution Approach 1:
The patent applies the dynamics principle by transforming the rigid carrier into a flexible one that can dynamically adapt to thermal expansion. The flexible carrier includes elastic deformation regions that allow the carrier to bend and adjust its shape when temperature changes cause the light guide plate to expand or contract, thereby maintaining alignment between light sources and optical input terminals throughout the operating temperature range.
Solution Approach 2:
The patent applies the parameter changes principle by allowing the physical state of the carrier to change in response to temperature variations. The flexible carrier's elastic deformation regions enable the carrier to change its geometric parameters (bending, stretching) as temperature changes, accommodating thermal expansion of the light guide plate while preserving alignment precision.
2Adaptability or versatility
If a flexible structure is used to accommodate thermal expansion, then adaptability is improved, but manufacturing precision deteriorates
Solution Approach 1:
The flexible carrier with elastic deformation regions provides dynamic adaptation to thermal expansion while maintaining manufacturing precision through proper design of the deformation regions. The elastic regions are strategically positioned and dimensioned to allow necessary movement for thermal accommodation while keeping light sources aligned with optical input terminals within acceptable tolerances.
Solution Approach 2:
The patent applies segmentation by dividing the carrier into rigid sections (that hold light sources) and elastic deformation regions (that accommodate thermal expansion). This segmentation allows the carrier to combine the alignment precision of rigid structures with the thermal adaptability of flexible structures, as the rigid sections maintain positioning while the elastic regions absorb dimensional changes.
3Stability of the object's composition
If light sources are rigidly fixed, then structural stability is improved, but alignment under thermal stress deteriorates
Solution Approach 1:
The flexible carrier provides structural stability through its overall design while incorporating dynamic elastic deformation regions that allow the structure to adapt to thermal stress. The carrier remains stable in terms of holding light sources securely, but the elastic regions enable controlled deformation to maintain alignment between light sources and optical input terminals under thermal stress conditions.
Solution Approach 2:
By segmenting the carrier into stable rigid portions and flexible elastic deformation regions, the patent achieves both structural stability and thermal alignment. The rigid portions provide stable mounting for light sources, while the elastic regions between them accommodate thermal expansion and contraction, preventing misalignment under thermal stress.
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 ensures consistent alignment of light sources with optical input terminals, reducing light leakage and maintaining optimal illumination efficiency across a wide temperature range, enhancing power efficiency and image quality.
Implementation Method 1
Thermal expansion of a light guide plate in a display module may cause significant displacement of the light guide plate relative to light sources disposed along an edge of the light guide plate
Implementation Method 2
The flexible carrier may include a number of flexures, each disposed between a respective pair of the light sources to allow a spacing between the pair of adjacent light sources to change
Data Source
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AI summary
A display includes a light guide plate (110), a plurality of light sources (114) disposed along an edge (116) of the light guide plate (110), and a flexible carrier (132) to which the plurality of light sources (114) are secured. The flexible carrier (132) includes a plurality of flexures (150), each flexure of the plurality of flexures disposed between a respective pair of adjacent light sources (114) of the plurality of light sources to allow a spacing between the pair of adjacent light sources to change.