Light Source Device Uniformity via Local Quality Patterns
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Solution Overview
Problem
Display apparatuses face challenges in achieving uniformity and efficiency of light emission due to uneven luminance caused by the arrangement of light sources.
Innovation Solution
The use of a light source device with a reflective sheet and a light source module that includes a substrate with a light emitting diode, an optical dome, and light patterns made of materials with varying reflectivity, such as silk and copper, to refract, reflect, and scatter light uniformly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If light sources are arranged in a conventional manner, then the device structure is simple, but the light uniformity is poor
Solution Approach 1:
The patent applies local quality by creating light patterns with different reflectivity at different locations on the substrate. High reflectivity regions are positioned where light needs to be redirected, while other areas maintain different properties. This spatial variation in optical properties enables uniform light distribution without requiring complex overall structural changes.
Solution Approach 2:
The patent introduces light patterns as intermediary elements between the light sources and the display panel. These patterns act as mediators that modify and redistribute light from the sources, converting point-like or uneven light emission into uniform illumination across the display area.
2Illumination intensity
If light sources are densely arranged to improve luminance, then the brightness increases, but the light uniformity deteriorates
Solution Approach 1:
The patent uses local quality by assigning different reflectivity characteristics to different regions of the substrate. High reflectivity light patterns are strategically placed to redirect light from dense source arrangements, ensuring that areas with higher source density contribute to uniform overall illumination rather than creating localized brightness spots.
3Loss of energy
If a reflective sheet is used to improve light efficiency, then the light utilization increases, but the light uniformity becomes uneven
Solution Approach 1:
The patent combines a reflective sheet with locally varied light patterns on the substrate. The reflective sheet provides overall light redirection and efficiency improvement, while the position-dependent light patterns with varying reflectivity fine-tune the distribution to achieve uniformity. This layered approach allows both high efficiency and uniformity to coexist.
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 configuration improves the uniformity and efficiency of light emission, enhancing the display's luminance and visual performance by absorbing and converting blue light within the light source module.
Implementation Method 1
The first light pattern may be configured to absorb blue light that is emitted from the light emitting diode, and convert the absorbed blue light to a different color light
Implementation Method 2
a reflective sheet through which a through hole is disposed, and a light source module exposed through the through hole... a first light pattern disposed on the substrate and inside the optical dome, the first light pattern including a material having a reflectivity higher than a reflectivity of the substrate
Implementation Method 3
an optical dome covering the light emitting diode... to refract, reflect, and scatter light uniformly
Implementation Method 4
a light emitting diode disposed on a portion of the substrate, the portion corresponding to the through hole... The light emitting diode may be configured to emit blue light
Data Source
AI summary
A display apparatus includes a reflective sheet through which a through hole is disposed, and a light source module exposed through the through hole. The light source module includes a substrate on which the reflective sheet is disposed, and a light emitting diode disposed on a portion of the substrate, the portion corresponding to the through hole. The light source module further includes an optical dome covering the light emitting diode, and a first light pattern disposed on the substrate and inside the optical dome, the first light pattern including a material having a reflectivity higher than a reflectivity of the substrate.