Backlight Unit Reflective Member for Uniform Light Distribution
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Solution Overview
Problem
Backlight units in display devices often suffer from non-uniform light distribution, leading to luminance issues due to the inefficient radiation of light from light sources to the entire display panel, particularly when a light guide plate is not used.
Innovation Solution
The implementation of a backlight unit with reflective members that utilize light reflection characteristics to disperse light emitted from multiple light sources across the display panel, eliminating the need for a light guide plate and simplifying the structure, thereby improving light uniformity and productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a light source is disposed on one area of the display panel, then the structure is simplified, but light distribution becomes non-uniform leading to luminance issues
Solution Approach 1:
A reflective member is introduced as an intermediary component between the light source and the display panel. This reflective member redirects and distributes light from the single-area light source across the entire display panel surface, achieving uniform illumination without requiring light sources at multiple locations or complex light guide structures
Solution Approach 2:
The solution transitions from a direct linear light path to a multi-dimensional light distribution approach. The reflective member creates indirect light paths that bounce light across different angles and directions, effectively distributing light from one area to the entire panel surface through spatial redirection
2Illumination intensity
If a light guide plate is used to distribute light, then light uniformity is improved, but the structure becomes more complex and thickness increases
Solution Approach 1:
The reflective member extracts and redirects light that would otherwise be lost or concentrated in one area. By positioning the reflective member strategically, it captures light from the single-area source and redistributes it across the panel, achieving the light-guiding function without requiring a full light guide plate structure
Solution Approach 2:
The reflective member serves as a simple, cost-effective alternative to complex light guide plates. It provides the necessary light distribution function with minimal structural complexity, effectively replacing expensive and thick light guide components with a simpler reflective surface
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 enhances light uniformity across the display panel, reduces the complexity and thickness of the display device, and ensures consistent brightness, addressing the issue of non-uniform luminance by effectively distributing light using reflective surfaces.
Implementation Method 1
the backlight unit may include a plurality of light sources 141 and a reflective member 110 configured to reflect light emitted from the plurality of light sources 141
Data Source
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AI summary
A display device includes a display panel, a bottom chassis supporting the rear of the display panel, a light source disposed on at least one side of the bottom chassis, a reflective member disposed between the display panel and the bottom chassis and having a reflective surface for reflecting light emitted from the light source to the display panel, and a reflective holder for fixing one end of the reflective member, the reflective holder reflecting light directed toward the reflective holder to the display panel.