Flexible Lighting Apparatus with Visible-Light Absorber
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Solution Overview
Problem
Conventional edge light type lighting apparatuses experience a change in color tone due to light absorption by the light guide plate, particularly when guiding white light, which affects desired optical characteristics, and they lack flexibility in installation and shape adaptation.
Innovation Solution
A lighting apparatus featuring a flexible, light-transmissive resin base material with visible-light absorbers uniformly dispersed, having a maximum absorption wavelength between 500 nm and 750 nm, and a light exit structure with prisms to maintain desired optical characteristics and adapt to various installation locations and shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If white light is guided through the light guide plate, then light transmission is achieved, but color tone changes due to light absorption
Solution Approach 1:
The patent introduces a visible-light absorber that converts the harmful effect of light absorption (which causes color tone changes) into a beneficial effect by selectively absorbing specific wavelength components. The absorber has a maximum absorption wavelength of at least 500 nm and at most 750 nm, which compensates for the yellowing effect and maintains color tone consistency throughout the light guide plate.
2Stability of the object's composition
If a rigid light guide plate is used, then structural stability is maintained, but adaptability to various installation locations and shapes is limited
Solution Approach 1:
The patent replaces the conventional rigid light guide plate with a flexible light guide made of a resin base material. This flexible light guide can be bent and shaped to adapt to various installation locations and surfaces while maintaining its light guiding function. The visible-light absorber is uniformly dispersed in the flexible resin base material, ensuring color tone consistency even when the light guide is bent or deformed.
3Adaptability or versatility
If the resin base material is made flexible, then adaptability to various shapes is improved, but light transmissivity may be compromised
Solution Approach 1:
The patent carefully selects and optimizes the parameters of the resin base material to achieve the right balance between flexibility and light transmissivity. The resin is formulated to be sufficiently flexible for shape adaptation while maintaining adequate light transmissivity for effective light guiding. The uniform dispersion of the visible-light absorber further optimizes the optical properties to compensate for any transmissivity loss.
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 prevents color tone changes and ensures consistent light output while allowing the lighting apparatus to be easily bent and installed on curved surfaces, achieving desired optical characteristics and broad applicability.
Implementation Method 1
a visible-light absorber uniformly dispersed in the resin base material, and the visible-light absorber has a maximum absorption wavelength of at least 500 nm and at most 750 nm
Data Source
AI summary
A lighting apparatus includes: a light source module; a light guide that guides light emitted from the light source module; and a light exit structure provided in the light guide, for causing the light to exit the light guide. The light guide includes: a base material that is flexible and light-transmissive; and a visible-light absorber uniformly dispersed in the base material. The visible-light absorber has a maximum absorption wavelength of at least 500 nm and at most 750 nm.