Optical Member Light Leakage Prevention via Ceramic Shielding
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Solution Overview
Problem
Existing optical members with wavelength conversion units experience light leakage from regions other than the desired extraction area, necessitating a solution to effectively reduce or prevent this leakage.
Innovation Solution
An optical member comprising a wavelength conversion member with a ceramic portion surrounding its lateral surfaces and a light shielding film on the outer lateral surface, which reduces light leakage by blocking light emitted from the ceramic portion and allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light absorbing film is disposed on the wavelength conversion member to suppress reflected light, then the effects of reflected light are suppressed, but light may leak from regions other than the desired light extraction region
Solution Approach 1:
The wavelength conversion member is divided into multiple regions with different light transmission properties. A first wavelength conversion region allows light transmission for the desired extraction, while a second wavelength conversion region has reduced light transmission to prevent leakage. This segmentation enables simultaneous achievement of light extraction and leakage prevention without requiring separate light absorbing films.
Solution Approach 2:
Different regions of the wavelength conversion member are assigned different optical properties. The first region (light extraction region) maintains high light transmission, while the second region (peripheral region) has reduced light transmission. This local differentiation of quality allows the structure to perform multiple functions within a single integrated component, preventing light leakage while maintaining desired light extraction.
2Object-generated harmful factors
If the optical member structure is expanded to prevent light leakage, then light leakage is reduced, but the device size increases and compactness is reduced
Solution Approach 1:
The light leakage prevention function is merged into the wavelength conversion member itself by creating a second wavelength conversion region with reduced light transmission. This eliminates the need for separate light absorbing films or additional light leakage prevention structures, thereby preventing light leakage while maintaining a compact device size.
Solution Approach 2:
The wavelength conversion member is designed to perform multiple functions simultaneously: wavelength conversion, light extraction, and light leakage prevention. By incorporating a second region with reduced light transmission within the same member, the structure achieves multi-functionality without increasing overall device volume, enabling compact design while preventing light leakage.
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 configuration effectively prevents light leakage and allows for a more compact optical member design by using a light shielding film on the outer lateral surface of the wavelength conversion member, ensuring that light is directed within the desired extraction region.
Implementation Method 1
a light shielding film arranged on an outer lateral surface of the first wavelength conversion member
Implementation Method 2
a wavelength conversion member (3) including a wavelength conversion portion (1) and a ceramic portion (2)
Data Source
AI summary
An optical member includes a first wavelength conversion member including a wavelength conversion portion and a ceramic portion surrounding lateral surfaces of the wavelength conversion portion, and a light shielding film arranged on an outer lateral surface of the first wavelength conversion member.