Light Source Module Penetrating Light Selection Layer
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Solution Overview
Problem
Direct type backlight modules for thick-sensitive products face challenges in reducing module thickness and cost due to the need for longer optical distances and increased numbers of light-emitting diodes, which also affect yield rates and alignment.
Innovation Solution
A light source module configuration including a light-emitting element, first and second optical layers, a penetrating light selection layer, a light splitting layer, and a wavelength conversion layer, allowing beams to travel in a longer transmission path for improved uniformity and reduced optical distance, while increasing brightness through beam adjustment and conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the optical distance is increased to reduce the number of light-emitting diodes, then cost is reduced, but the backlight module thickness increases
Solution Approach 1:
The patent introduces a light guide layer with light guide slopes that redirects light in the vertical dimension, allowing light to reach the optical film from different angular paths. This dimensional change enables effective light transmission with a shorter vertical optical distance, thereby reducing module thickness while maintaining the ability to use fewer light-emitting diodes
Solution Approach 2:
The light guide layer acts as an intermediary between the light-emitting diodes and the optical film. It captures light from the LEDs and redistributes it through its sloped structure, enabling efficient light transmission with reduced optical distance requirements, thus allowing thinner module design without increasing the number of LEDs
2Illumination intensity
If the number of light-emitting diodes is increased to improve light uniformity in thick-sensitive products, then light uniformity is improved, but cost increases
Solution Approach 1:
The light guide layer serves as a mediator that redistributes light from fewer LEDs across the entire display area. Its sloped structure ensures uniform light dispersion, achieving good light uniformity without requiring an increased number of light-emitting diodes, thereby reducing cost while maintaining uniformity
3Illumination intensity
If the number of light-emitting diodes is increased to improve light uniformity, then light uniformity is improved, but yield rate is reduced
Solution Approach 1:
The light guide layer acts as an intermediary that enables uniform light distribution with fewer LEDs. This reduces the complexity of the mounting process and the number of components that need to be assembled, thereby improving yield rate while maintaining light uniformity
4Quantity of substance
If light-guiding side walls are added to reduce the number of light-emitting diodes, then the number of light-emitting diodes is reduced, but module thickness is not effectively reduced
Solution Approach 1:
The patent uses a thin light guide layer with integrated light guide slopes instead of bulky light-guiding side walls. This film-based approach achieves effective light redirection and distribution while maintaining a thin profile, thereby reducing module thickness while still enabling the use of fewer light-emitting diodes
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 enhances illumination uniformity, allows for increased spacing between light-emitting elements, reduces module thickness, and lowers costs by optimizing beam travel and brightness within the light source module.
Implementation Method 1
The first optical layer is disposed on a transmission path of the beam. An exit angle of the beam at which the beam exits the first optical layer is greater than an incident angle of the beam at which the beam is incident to the first optical layer
Implementation Method 2
The penetrating light selection layer allows light with a wavelength falling within a second wavelength band to pass through, and the penetrating light selection layer has corresponding transmittance for light with a wavelength falling within the first wavelength band and is incident at different angles
Implementation Method 3
The second optical layer is disposed on the transmission path of the beam. When the beam is incident to the second optical layer, an exit angle of the beam at which the beam exits the second optical layer is less than an incident angle of the beam at which the beam is incident to the second optical layer
Implementation Method 4
The light splitting layer is disposed on the transmission path of the beam. The light splitting layer allows light with a wavelength falling within the first wavelength band to pass through and reflects light with a wavelength falling within the second wavelength band
Implementation Method 5
The wavelength conversion layer is disposed on the transmission path of the beam and configured to convert part of the beam into a converted beam, and a wavelength of the converted beam falls within the second wavelength band
Data Source
AI summary
A light source module includes at least one light-emitting element, a first optical layer, a penetrating light selection layer, a second optical layer, a light splitting layer, and a wavelength conversion layer. The light-emitting element is configured to provide a beam with a wavelength falling within a first wavelength band. An exit angle at which the beam exits the first optical layer is greater than an incident angle at which the beam is incident to the first optical layer. The penetrating light selection layer may allow light with a wavelength falls within a second wavelength band to pass through and has corresponding transmittance for light with a wavelength falling within the first wavelength band and is incident at different incident angles. An exit angle at which the beam exits the second optical layer is less than an incident angle at which the beam is incident to the second optical layer.