Asymmetric Hexagonal Light Source Unit for Projector Illuminance
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Solution Overview
Problem
The existing light source units for projectors using light-emitting diodes face challenges in miniaturization and illuminance due to the need for thicker mirror tunnels and limited diode arrangement, which results in increased heat effects and reduced light utilization efficiency.
Innovation Solution
A light source unit with a main body having inclined reflecting planes defining a rectangular projecting port, where the inclination angles and shapes of the sides allow for efficient diode placement and reduced light diffusion, enabling better light projection and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large number of light emitting diodes are arranged on the bottom surface of a quadrangular prism-shaped mirror tunnel, then the quantity of light projected increases, but the mirror tunnel becomes thicker and the light beams intersect the optical axis at large angles causing diffusion
Solution Approach 1:
The patent changes the mirror tunnel from a quadrangular prism shape to a hexagonal prism shape with asymmetric wall surface inclinations. The wall surfaces on longer sides have a first inclination angle while wall surfaces on shorter sides have a second inclination angle, creating asymmetric light reflection paths that prevent large-angle intersections with the optical axis while accommodating more light emitting diodes.
Solution Approach 2:
The patent transitions from arranging light emitting diodes only on the bottom surface to arranging them on multiple surfaces (bottom surface and side surfaces) of the hexagonal prism. This multi-dimensional arrangement increases the quantity of light without requiring increased tunnel thickness.
2Object-affected harmful factors
If light emitting diodes are arranged at predetermined intervals to eliminate heat effects from adjacent diodes, then heat influence is reduced, but the number of light emitting diodes that can be disposed on a fixed area is limited
Solution Approach 1:
The patent utilizes multiple surfaces of the hexagonal prism (bottom surface and multiple side surfaces) to arrange light emitting diodes. This multi-dimensional distribution increases the total number of diodes while maintaining sufficient spacing intervals to reduce heat influence between adjacent diodes.
Solution Approach 2:
Each wall surface of the hexagonal prism serves as a mounting surface for light emitting diodes, maximizing the use of available space. The asymmetric design allows different wall surfaces to have different numbers of diodes based on their inclination angles and lengths, optimizing both heat management and light quantity.
3Quantity of substance
If the diameter of the mirror tunnel is increased to accommodate more light emitting diodes, then the quantity of light increases, but the light beams intersect the optical axis at large angles causing diffusion and reducing light utilization efficiency
Solution Approach 1:
The asymmetric inclination angles of the wall surfaces are specifically designed to control light reflection angles. The first inclination angle for longer sides and the second inclination angle for shorter sides work together to ensure that reflected light beams do not intersect the optical axis at large angles, maintaining high light utilization efficiency while increasing light quantity through the hexagonal configuration.
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 allows for a higher density of light-emitting diodes, improved light efficiency, and reduced heat effects, enhancing illuminance while facilitating projector miniaturization.
Implementation Method 1
the mirror tunnel has to be thicker, which will disrupt the miniaturization of the projector which utilizes the relevant light source unit. In addition, when the light emitting diodes are illuminated, the light emitting diodes are badly affected by heat generated by the light emitting diodes disposed adjacent thereto
Data Source
AI summary
A light source unit has a main body portion and light emitting elements, and the main body portion includes wall surfaces which constitute reflecting planes which are inclined so as to define a rectangular projecting port, and an inclination of the wall surfaces lying on longer member sides constitutes an inclined angle which is smaller than an inclination of the wall surfaces lying shorter member sides of the projecting port, the wall surfaces on the shorter member sides being each formed into a trapezoidal shape.