Direct Type Backlight Non-Uniform LED Row Spacing
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Solution Overview
Problem
Conventional LED backlight designs with equal row gaps fail to optimize lightness distribution, particularly at the central position, affecting user visual sensation.
Innovation Solution
The design involves varying the row gaps between LED rows, with the gap nearest to the center being minimized, and optionally increasing gaps sequentially from the center to the margins, to enhance lightness distribution and visual experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LED rows are evenly spaced with equal row gaps, then the structure is simple and easy to manufacture, but the central lightness distribution is poor and does not optimize user visual sensation
Solution Approach 1:
The patent applies local quality by making different parts of the LED row arrangement have different spacing characteristics. Specifically, the row gaps are designed to be non-uniform, with the gap nearest to the center being minimum and other gaps increasing sequentially from the center toward the margins. This local variation in spacing optimizes the lightness distribution at the central position, which is most critical for user visual sensation, while maintaining a relatively simple overall structure.
2Illumination intensity
If row gaps are varied with minimum gap at center and increasing toward margins, then central lightness distribution is optimized, but the structure becomes more complex
Solution Approach 1:
The patent employs asymmetry by deliberately creating non-uniform row gaps between LED rows. The gap nearest to the center is designed to be minimum, while other gaps increase sequentially from the center toward the margins. This asymmetric spacing pattern is specifically designed to optimize lightness distribution at the central position, creating a focused illumination pattern that enhances user visual sensation without requiring complex additional components.
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 approach optimizes central lightness and user visual sensation by ensuring the central position receives maximum relative lightness, improving the overall lightness distribution and visual experience.
Implementation Method 1
The principle for operating a backlight module is to direct the light emitted from a backlight as a planar light source via a light guide plate... Although the CCFL is the main trend currently, yet the demands for using the LEDs have been increasing daily.
Data Source
AI summary
A direct type backlight has a plate and a plurality of light emitting diode (LED) rows. The LED rows are disposed on the plate, and every two adjacent LED rows have a row gap positioned therebetween. The one of these gaps, which is nearest to the center of the direct type backlight, is a minimum gap.