LED Board Bar Layout for Uniform Display Luminance
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Solution Overview
Problem
Existing display apparatuses face challenges in achieving luminance uniformity, reducing product costs, and simplifying the manufacturing process.
Innovation Solution
The display apparatus incorporates a design with a plurality of board bars on which light sources are mounted, featuring protrusions and recesses with varying shapes and sizes to optimize light distribution, and a reflective sheet to enhance luminance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light sources are mounted on board bars with uniform structure, then manufacturing is simple, but luminance uniformity is poor
Solution Approach 1:
The board bar employs asymmetric protrusion structures where first protrusions and second protrusions have different shapes and dimensions. This local variation in structure allows different light sources to be positioned at optimized locations, creating locally tailored light distribution patterns that collectively achieve uniform luminance across the display panel.
Solution Approach 2:
The invention introduces asymmetric geometry into the board bar design by making the first protrusions differ from the second protrusions in shape, size, or position. This asymmetry enables differential positioning of light sources on opposite sides of the board bar, which is critical for achieving uniform luminance distribution across the display surface.
2Manufacturing precision
If complex protrusion and recess structures are used on board bars, then luminance uniformity improves, but manufacturing complexity increases
Solution Approach 1:
The board bar is segmented into multiple functional regions with distinct protrusion structures. By dividing the light source mounting structure into separate first protrusions and second protrusions with different geometries, the design achieves complex light distribution patterns while maintaining modular manufacturing capabilities for each segment.
3Manufacturing precision
If light sources are positioned to achieve uniform luminance, then product performance improves, but manufacturing cost increases
Solution Approach 1:
The asymmetric protrusion design enables local optimization of light source positions without requiring complex overall system design. Each protrusion type (first and second) is locally tailored to its specific function, simplifying the placement process while achieving uniform luminance output.
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 design improves luminance uniformity and reduces manufacturing complexity while potentially lowering costs by optimizing light source placement and distribution.
Implementation Method 1
Each of the plurality of light sources includes a light emitting diode (LED) or an organic light emitting diode (OLED)
Implementation Method 2
Each of the plurality of light sources includes a light emitting diode (LED) or an organic light emitting diode (OLED)
Implementation Method 3
a reflective sheet to enhance luminance uniformity
Data Source
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AI summary
A display apparatus includes: light sources and board bars on which the light sources are mounted, the board bars spaced apart from each other along a first direction, wherein each of the board bars comprises: a central extending portion extending in a second direction; first protrusions protruding from one side of the central extending portion with respect to the first direction, and arranged along the second direction, wherein first side light sources from among the light sources are on the first protrusions; first recess portions between adjacent pairs of the first protrusions, respectively; second protrusions protruding from another side of the central extending portion, opposite of the one side, and arranged along the second direction, wherein second side light sources from among the light sources are on the second protrusions; and second recess portions between adjacent pairs of the second protrusions, respectively.