Backlight Reflecting Sheet Layout for Uniform Display Illumination
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Solution Overview
Problem
Existing backlight units in display devices suffer from non-uniform light distribution, leading to brightness inconsistencies that affect the viewing experience.
Innovation Solution
Incorporation of a reflecting sheet with a specific pattern of dots and holes designed to optimize light reflection and distribution, ensuring uniform illumination across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional reflecting sheet is used in the backlight unit, then the structure is simple, but the light distribution is non-uniform causing brightness inconsistencies
Solution Approach 1:
The reflecting sheet incorporates dot patterns at specific locations (particularly around outermost holes and in corner regions) where light distribution is typically non-uniform. These localized dot modifications create controlled reflection zones that compensate for edge effects and improve overall light uniformity without requiring complete redesign of the entire sheet.
Solution Approach 2:
The reflecting sheet is divided into distinct functional regions: areas with dot patterns, areas without dots, and regions with different dot densities. This segmentation allows each zone to perform its specific function - dots in corner/edge regions for light redistribution, and smooth areas for maintaining uniform reflection, thereby solving the non-uniform light distribution problem.
2Illumination intensity
If dots are added to the reflecting sheet to improve light uniformity, then brightness consistency improves, but manufacturing complexity increases
Solution Approach 1:
The patent specifies particular parameters for the dot patterns including size (e.g., 1-10 micrometers), spacing (e.g., 10-50 micrometers), and location (around outermost holes and in corner regions). By defining these parameters within specific ranges, the invention makes the dot pattern manufacturable using conventional techniques while achieving the desired light uniformity improvement.
Solution Approach 2:
The dot patterns are implemented as surface modifications on the reflecting sheet rather than complex three-dimensional structures. This approach uses simple, easily manufacturable surface features (dots) rather than complex assemblies, reducing manufacturing complexity and cost while achieving the light uniformity improvement.
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 solution enhances light uniformity, reducing brightness non-uniformity and providing a more consistent viewing experience by effectively managing light reflection and distribution.
Implementation Method 1
a reflecting sheet located on the at least one substrate, wherein the reflecting sheet includes a first sheet part located on the bottom, the first sheet part including a plurality of holes corresponding to the plurality of light sources, and a plurality of first dots
Data Source
AI summary
A display device including a display panel; a frame at a rear of the display panel; a plurality of light sources between the display panel and the frame, the light sources providing light for the display panel; a plurality of lenses respectively mounted on the plurality of light sources; and a reflecting sheet between the display panel and the frame. In addition, the reflecting sheet includes a first sheet part forming a central area of the reflecting sheet; a second sheet part forming a side area of the reflecting sheet around the first sheet part; and first and second strips of light controlling material respectively disposed on the reflecting sheet at first and second outside edges of a corresponding lens, and the corresponding lens overlaps at least a portion of the first and second strips of light controlling material.