Backlight Assembly Buffer Member for Light Source Protection
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Solution Overview
Problem
In liquid crystal display devices, deformation of the light guide due to heat from the light source can cause pressure on the light source, leading to damage and diffraction of light, reducing uniform luminance and efficiency.
Innovation Solution
A backlight assembly design featuring a light guide with a buffer member, including a ladder-shaped structure with bar-shaped supporting units and connections, positioned between the light guide and the circuit board, which exposes the light source and includes a reflective material to minimize light loss and prevent deformation-induced pressure on the light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a buffer member is placed between the light guide and light source to prevent deformation-induced pressure, then the light source is protected from damage, but the light path is altered causing diffraction and reduced incident light efficiency
Solution Approach 1:
The patent introduces a buffer member as an intermediary element positioned between the light guide and light source. This buffer member serves as a mediator that absorbs deformation forces from the light guide while maintaining optical transparency, allowing light to pass through without significant diffraction or path alteration, thus protecting the light source without compromising incident light efficiency
2Productivity
If the light guide is positioned close to the light source to maximize light incidence, then incident light efficiency is increased, but heat from the light source causes deformation of the light guide leading to pressure on the light source
Solution Approach 1:
The patent applies beforehand cushioning by placing a buffer member between the light guide and light source before heat-induced deformation can occur. This buffer member is positioned in advance to absorb and distribute the thermal expansion and deformation forces that will be generated by the light source heat, preventing direct contact and pressure on the light source while maintaining close positioning for efficient light incidence
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 buffer member effectively prevents damage to the light source from deformation and enhances light efficiency by maintaining a consistent light path and reflecting non-incident light, thereby increasing incident light efficiency and reducing light loss.
Implementation Method 1
the buffer member includes a reflective material such that the light that is not incident to the light guide or the light emitted from the light guide, is reflected back toward the light guide by the buffer member
Data Source
AI summary
A backlight assembly includes: a light guide; a light source at one side of the light guide and separated from the light guide; a circuit board on which the light source is mounted; and a buffer member between the light guide and the circuit board. An opening is defined in the buffer member and exposes the light source.