LED Projection Lamp Lens Using Multiple Reflection and Refraction
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Solution Overview
Problem
Existing LED light sources in starry sky projection lamps suffer from insufficient brightness, leading to increased costs when using laser light sources to compensate, and there is a need for a cost-effective solution to achieve high brightness and diverse lighting effects.
Innovation Solution
A novel lens design for LED light sources that includes a light directing portion with a reflection group and refraction groups, allowing multiple reflections and refractions to enhance brightness, integrated with a divergence portion to diverge the light beam, and a projection lamp configuration using a first and second reflection mirror to create patterns like a starry sky.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LED light sources are used in starry sky projection lamps, then production cost is reduced, but brightness is insufficient
Solution Approach 1:
The patent combines multiple optical functions (reflection, refraction, divergence) into a single integrated lens structure. The lens merges the light-directing portion with the divergence portion to achieve both brightness enhancement through multiple optical interactions and cost reduction by using LED instead of laser, resolving the contradiction between cost and brightness.
Solution Approach 2:
The light-directing portion continuously redirects light rays through multiple reflections and refractions before they reach the divergence portion. This continuous optical action ensures that light from the LED source is efficiently utilized throughout the projection path, maintaining high brightness despite the lower initial output of LED compared to laser sources.
2Illumination intensity
If laser light sources are used to achieve high brightness, then brightness is improved, but production cost increases
Solution Approach 1:
The patent changes the optical parameters of the light path by introducing multiple reflection and refraction surfaces in the lens. This transforms the light distribution pattern from the LED source, concentrating and redirecting light to achieve brightness levels comparable to laser sources while maintaining the cost advantage of using LED technology.
Solution Approach 2:
The lens acts as an intermediary between the LED light source and the projection medium. It mediates the light output by collecting, redirecting, and concentrating the light from the LED, effectively bridging the brightness gap between LED and laser sources while avoiding the high cost of laser technology.
3Illumination intensity
If multiple reflections and refractions are implemented in the lens, then brightness is enhanced, but device complexity increases
Solution Approach 1:
The patent merges multiple optical surfaces (reflection surfaces and refraction surfaces) into a single integrated lens body. This consolidation achieves the desired brightness enhancement through multiple optical interactions while avoiding the complexity of assembling separate optical components, thus resolving the contradiction between brightness enhancement and device complexity.
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 lens design achieves higher brightness and cost-effective formation of lighting patterns, such as a starry sky, using LED light sources, reducing production costs while maintaining brightness comparable to laser light sources.
Implementation Method 1
Light is reflected by the plurality of reflection surfaces
Implementation Method 2
the light is refracted by the plurality of first refraction surfaces and subsequently refracted by the second refraction surface
Implementation Method 3
a light beam is then diverged out
Data Source
AI summary
Disclosed is a novel lens for an LED light source, and a projection lamp with the same. The lens includes a reflection portion and a divergence portion. A light source is refracted by the reflection portion and then projected to the divergence portion, by which a light beam is then diverged out. The divergence portion has a flat surface side and a concave surface side, and the reflection portion is arranged on the flat surface side. The utility model has the following beneficial effects: the structure is exquisite, by using a new structural design for a focus lens, the light beam of the LED light source is reflected and refracted multiple times in the lens and then diverged, which solves the problem of large area of the LED light source, and at the same time, after being re-focused, the light beam is suitable for forming higher-brightness white light.