Optical Base Plate Protrusion for Uniform Light Extraction
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Solution Overview
Problem
Conventional illumination apparatuses with light guiding plates suffer from low light extraction efficiency and increased cost due to repeated light reflection, leading to non-uniform light output.
Innovation Solution
An illumination apparatus comprising a frame, an optical base plate with a protrusion area featuring reflective surfaces of varying inclination angles, a light source positioned adjacent to the optical base plate, and an optical film, which eliminates the need for a conventional light guiding plate, enhancing light extraction efficiency and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a light guiding plate is used to guide and transmit light, then light can be transmitted through the illumination apparatus, but light extraction efficiency decreases due to repeated reflections (about 60-65%)
Solution Approach 1:
The patent removes the light guiding plate from the illumination apparatus structure. By extracting this component, the repeated internal reflections that cause energy loss are eliminated, and light can directly pass through the optical base plate to the optical film, significantly improving light extraction efficiency while simplifying the overall structure.
Solution Approach 2:
The patent integrates the light guiding function directly into the optical base plate by adding a protrusion portion with reflective surfaces. This merging of functions eliminates the need for a separate light guiding plate, reducing structural complexity while maintaining or improving light transmission efficiency.
2Weight of moving object
If a light guiding plate is additionally arranged to guide light, then light transmission is achieved, but the weight of the flat lamp increases
Solution Approach 1:
The light guiding function is merged into the optical base plate through the addition of a protrusion portion with reflective surfaces. This integration eliminates the need for a separate light guiding plate, thereby reducing the overall weight of the flat lamp while maintaining the light guiding function.
Solution Approach 2:
The patent extracts and removes the light guiding plate from the structure. By taking out this additional component, the weight of the flat lamp is reduced while the light guiding function is maintained through the modified optical base plate design.
3Ease of manufacture
If a light guiding plate is additionally arranged to guide light, then light transmission is achieved, but the cost of the flat lamp increases
Solution Approach 1:
The light guiding function is merged into the optical base plate, eliminating the need for a separate light guiding plate. This reduces the number of components that need to be manufactured and assembled, thereby lowering the overall manufacturing cost while simplifying the structure.
Solution Approach 2:
The patent extracts and removes the light guiding plate from the structure. By taking out this additional component, the bill of materials and assembly complexity are reduced, leading to lower manufacturing costs.
4Illumination intensity
If light is reflected many times in the light guiding plate, then light is transmitted through the apparatus, but light output uniformity decreases
Solution Approach 1:
The patent removes the light guiding plate that causes multiple internal reflections. By extracting this component, light travels more directly from the light source through the optical base plate to the optical film, reducing the number of reflections and improving both light output uniformity and extraction efficiency.
Solution Approach 2:
The patent adds a protrusion portion with specific reflective surfaces to the optical base plate. This local modification creates controlled reflection zones that improve light distribution uniformity without causing the excessive reflections that occur in a full light guiding plate structure.
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 achieves higher light extraction efficiency and better light output uniformity while reducing costs by optimizing light distribution and reflection within the apparatus.
Implementation Method 1
The reflective surface includes a plurality of inclined surfaces with different inclination angles
Implementation Method 2
The optical film is disposed at the frame, and the protrusion portion of the optical base plate protrudes toward the optical film
Data Source
AI summary
An illumination apparatus includes a frame, an optical base plate, a light source and an optical film. The optical base plate is disposed in the frame and has a protrusion area at the center of the optical base plate. The protrusion area has at least a protrusion portion, which has at least a reflective surface. The reflective surface includes a plurality of inclined surfaces with different inclination angles. The light source is disposed in the frame and located adjacent to the periphery of the optical base plate. The light source is disposed corresponding to the reflective surface and has a plurality of light-emitting elements. Each light-emitting element has an optical axis direction, and the optical axis directions extend toward the protrusion area. The optical film is disposed at the frame, and the protrusion portion of the optical base plate protrudes toward the optical film.