Light Source Unit Low Reflection Pattern Brightness Evenness
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Solution Overview
Problem
Existing light source units for display devices, such as liquid crystal televisions, face challenges in achieving even brightness distribution while maintaining a thin profile, as the reflection patterns in current LED backlights can be thick and difficult to manufacture, leading to brightness unevenness and manufacturing complexities.
Innovation Solution
A light source unit design featuring a low reflection pattern around micro light sources, with a reflection pattern on a base that has a lower reflectivity than other regions, and a second light scattering body to enhance brightness evenness and manufacturing robustness, allowing for a thinner profile while maintaining even brightness distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a thick cured layer is formed as a reflection pattern to correspond to steep light distribution characteristics, then brightness evenness on the light emission surface is improved, but the thickness of the light source unit increases
Solution Approach 1:
The patent applies local quality by forming a low reflection pattern in specific regions around the light source where light intensity is highest. This localized modification allows the reflection pattern thickness to be reduced in areas where it is most needed for brightness evenness, while maintaining overall brightness uniformity without increasing the overall thickness of the light source unit.
Solution Approach 2:
The patent changes the reflectivity parameter by introducing a low reflection pattern with different optical properties in specific regions. By adjusting the reflectivity parameter locally around the light source, the patent achieves better brightness distribution while allowing the cured layer thickness to be reduced, thus solving the contradiction between brightness evenness and thickness.
2Illumination intensity
If a thick cured layer is formed as a reflection pattern, then brightness evenness on the light emission surface is improved, but manufacturing complexity increases
Solution Approach 1:
The patent simplifies manufacturing by applying local quality - forming the low reflection pattern only in specific regions around the light source rather than uniformly across the entire surface. This localized approach reduces the complexity of forming and curing the resin composition while still achieving the desired brightness evenness effect.
Solution Approach 2:
The patent applies segmentation by dividing the reflection pattern into different regions: a low reflection pattern region around the light source and other regions with different properties. This segmentation allows for simpler manufacturing processes in each region while achieving overall brightness uniformity, reducing the complexity of forming a uniformly thick cured layer.
3Length of moving object
If the thickness of the light source unit is reduced, then the light source unit becomes thinner and more compact, but brightness evenness on the emission surface deteriorates
Solution Approach 1:
The patent uses local quality to maintain brightness evenness in a thin light source unit by creating a low reflection pattern in specific regions around the light source. This localized optical modification compensates for the reduced thickness, allowing the light to be distributed more evenly across the emission surface without requiring a thick cured layer throughout the entire unit.
Solution Approach 2:
The patent changes optical parameters locally by introducing the low reflection pattern with different reflectivity characteristics in regions around the light source. This parameter change allows the thin light source unit to achieve proper light distribution and brightness evenness that would otherwise require increased thickness.
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 achieves a thinner light source unit with even brightness distribution on the emission surface, reducing manufacturing difficulties and enhancing the robustness of the light source unit's brightness evenness, particularly effective in cases of peaky light distribution characteristics.
Implementation Method 1
a low reflection pattern that is formed in a region of the light source installation surface positioned around the at least one micro light source based on the light distribution characteristics, in which a reflectivity in the region of the light source installation surface in which the low reflection pattern is formed is less than a reflectivity in a region other than the region in which the low reflection pattern is formed
Implementation Method 2
a base that is arranged with the light source installation surface and has a light-transmitting property
Data Source
AI summary
A light source unit and a display device that are further thinned while evenness in brightness on an emission surface is secured are provided.A light source unit and a display device of the present invention include a light source installation surface on which at least one micro light source is installed, a base that is arranged with the light source installation surface and has a light-transmitting property, a reflection pattern that is formed on a first surface of the base positioned on a light source installation surface side based on light distribution characteristics of the at least one micro light source, and a low reflection pattern that is formed in a region of the light source installation surface positioned around the at least one micro light source based on the light distribution characteristics. A reflectivity in the region of the light source installation surface in which the low reflection pattern is formed is less than a reflectivity in a region other than the region in which the low reflection pattern is formed.