Prismoidal LED Light Source for Uniform Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional image projectors using discharge lamps are inefficient in terms of power consumption, heat generation, noise, and cost, while LED light sources struggle to achieve satisfactory brightness due to limited LED placement in small spaces.
Innovation Solution
A prismoidal light source with inclined sides and a reflective inner surface, allowing for a dispersive arrangement of LEDs on a smaller base and risers, which increases the number of LEDs and enhances brightness distribution, enabling a more compact and efficient light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple regular arrangement of LEDs at intervals on the end of the housing is used, then the structure is simple and easy to manufacture, but the number of LEDs that can be disposed is limited and brightness is insufficient
Solution Approach 1:
The patent transitions from a one-dimensional linear arrangement of LEDs on a flat surface to a two-dimensional arrangement on a stepped prismoidal surface. The stepped structure provides multiple levels (risers and treads) that allow LEDs to be positioned in both horizontal and vertical dimensions, significantly increasing the number of LEDs that can be accommodated within the same housing volume while maintaining manufacturing simplicity.
2Illumination intensity
If more LEDs are disposed in a small space to increase brightness, then illumination intensity improves, but heat radiation becomes more difficult and device complexity increases
Solution Approach 1:
By utilizing the vertical dimension through stepped structures, the patent increases LED density without requiring a larger housing volume. The stepped prismoidal housing creates multiple elevation levels that allow LEDs to be arranged in a space-efficient manner, increasing brightness while avoiding the need for complex cooling systems or excessive housing size.
Solution Approach 2:
The housing is segmented into multiple stepped levels with risers and treads, creating distinct zones for LED placement. This segmentation allows for systematic arrangement of LEDs across different planes, facilitating both heat dissipation through distributed positioning and simplified manufacturing through modular construction.
3Ease of manufacture
If LEDs are arranged on a flat surface, then manufacturing is simple, but the number of LEDs is limited and brightness distribution is non-uniform
Solution Approach 1:
The patent introduces vertical elevation changes through stepped structures, transforming the flat two-dimensional arrangement into a three-dimensional configuration. This allows LEDs to be positioned at different heights and angles, creating more uniform light distribution across the projection surface while maintaining the simplicity of mounting LEDs on flat stepped surfaces.
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 allows for a higher number of LEDs to be packed in a smaller space, improving brightness and reducing the size of the light source, resulting in a more efficient and compact projector design.
Implementation Method 1
The entire inner surface of the housing is made of an optically reflective material. A plurality of light emitting elements are arranged on the smaller base of the prismoidal housing and the respective risers of the steps of each flight such that the plurality of light emitting elements emit rays of light toward the open larger base of the housing.
Data Source
AI summary
A light source comprising a prismoidal housing with inclined sides of a flight of steps and with a closed smaller base and an open larger base. The entire inner surface of the housing is made of an optically reflective material. A plurality of light emitting elements are arranged on the smaller base of the prismoidal housing and the respective risers of the steps of each flight such that the plurality of light emitting elements emit rays of light toward the open large base of the housing.