Light-Emitting Module Groove Design for Reduced Light Leakage
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Solution Overview
Problem
Conventional liquid crystal display apparatuses suffer from low light-using efficiency due to light leakage caused by a gap between the light-emitting diode and the light-guiding unit, leading to increased power consumption and reduced brightness.
Innovation Solution
A light-emitting module with a light-guiding unit featuring a groove to house both a light-emitting unit and a fluorescent unit, where the fluorescent unit converts blue-colored light into white-colored light, reducing light loss and improving efficiency by minimizing the gap between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the gap between the light-emitting diode and the light-guiding unit is reduced to minimize light leakage, then light-using efficiency is improved, but manufacturing precision becomes more difficult to maintain due to cutting margins and injection-molding margins
Solution Approach 1:
A resin layer is introduced as an intermediary substance between the light-emitting diode and the light-guiding unit. This resin layer fills the gap created by manufacturing tolerances (cutting margins and injection-molding margins), preventing light leakage while accommodating variations in manufacturing precision. The resin acts as a optical coupling medium that maintains close contact between components without requiring extremely tight tolerances.
2Loss of energy
If the light-emitting diode is disposed close to the light-guiding unit to improve light guidance, then light-using efficiency increases, but the complexity of assembly and positioning increases
Solution Approach 1:
The light-emitting diode, resin layer, and light-guiding unit are combined into an integrated assembly where the resin layer is pre-applied to the light-emitting diode or the light-guiding unit before final assembly. This merging of components simplifies the assembly process by reducing the number of separate positioning steps required, while maintaining the close proximity needed for efficient light guidance.
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-using efficiency, reduces power consumption, and improves brightness by minimizing light leakage and ensuring accurate placement of the light-emitting unit within the light-guiding unit, resulting in a more efficient and compact display device.
Implementation Method 1
the fluorescent unit receives the first light and emits a second light toward an inner side surface of the groove, the second light having a different wavelength range than the first light
Data Source
AI summary
A light-emitting module includes a light guiding body, a light-emitting unit and a fluorescent unit. The light-guiding unit has a groove. The light-emitting unit is disposed in a portion of the groove and emits a first light. The fluorescent unit is disposed in a remaining portion of the groove, receives the first light and emits a second light having a different wavelength range than the first light. The fluorescent unit emits the second light to an inner side surface of the groove. Therefore, loss of the first and second light is reduced and light-using efficiency of the light-emitting module is increased. Furthermore, a power consumption of a display device is significantly reduced.