Lighting Device With Apertured Light Shield for Uniform Illumination
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Solution Overview
Problem
Existing lighting devices using LED emitters often suffer from non-uniform light intensity and hot spots, which can create unwanted visual artifacts and reduce the perceived quality of illumination.
Innovation Solution
The lighting device incorporates an internal optical structure with light shields and reflectors that redirect and diffuse light to achieve uniform brightness and color distribution along its length, using a combination of light shields and reflectors to manage light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED emitters are used for illumination, then power consumption is reduced and lifetime is extended, but non-uniform light intensity and hot spots occur
Solution Approach 1:
The lighting device is divided into multiple segments including a housing, reflector, light shield with apertures, and lens assembly. Each component segments and redirects specific portions of light to achieve uniform distribution. The light shield segments light into portions that pass through apertures and portions that reflect off surfaces, preventing hot spots and creating uniform illumination intensity.
2Adaptability or versatility
If multi-colored LED emitters are combined to produce white light, then color temperature adjustment is enabled, but light uniformity and color distribution become challenging
Solution Approach 1:
Different portions of light from multi-colored LED emitters are treated differently by the optical components. The light shield and reflector create local variations in light path management, with specific areas directing different color temperatures through apertures and reflections. This local quality control ensures uniform color distribution while maintaining the ability to adjust overall color temperature across the entire lighting device.
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 effectively minimizes hot spots and achieves a uniform light intensity across the device, enhancing the perceived quality of illumination by creating a continuous, uniform light source.
Implementation Method 1
The reflector may be configured to reflect the light generated by the emitter toward the first lens
Implementation Method 2
The light shield may include a first surface configured to reflect the light emitted by emitter. The first surface may be configured to redirect a first portion of the light emitted by the emitter toward a base portion of the reflector
Implementation Method 3
The second lens may be configured to diffuse the redirected first portion of light prior to passing through the first lens. The first lens may be configured to diffuse the light generated by the emitter
Data Source
AI summary
A lighting device includes a first lens, a housing defining a cavity, an emitter mounted within the housing, a reflector within the cavity, and an internal optical structure. The reflector is configured to reflect the light generated by the emitter toward the first lens. The internal optical structure is located between the emitter and the first lens. The internal optical structure includes a second lens and a light shield between the second lens and the emitter. The light shield includes a first surface configured to reflect the light emitted by emitter and includes one or more apertures therethrough that are configured to allow the light emitted by the emitter to pass therethrough.