Illuminating Device Lens and Reflector Light Distribution
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Solution Overview
Problem
Existing illuminating devices face challenges in reducing size while achieving uniform light emission across the entire light radiation surface, as the width of the light guide body is increased by the light emitting portion, leading to inefficient light distribution and attenuation.
Innovation Solution
Incorporating a light reflecting portion opposed to the light source to reflect emitted light obliquely rearward, combined with a lens and a case design that allows light to travel through a gap, reducing the width of the device and enhancing light distribution and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide body with a light emitting portion is used to distribute light, then light distribution is improved, but the width of the device increases
Solution Approach 1:
The patent removes the light guide body and diffusing material from the device structure. Instead of using a wide light guide body to distribute light, the invention extracts this function and replaces it with a compact lens system combined with reflective surfaces that redirect light from the LED, achieving uniform light distribution without increasing device width
Solution Approach 2:
The patent utilizes the vertical dimension by positioning the lens above the LED and using reflective surfaces on the circuit board and lens inner surface to redirect light. This three-dimensional light redirection approach replaces the two-dimensional light distribution method of the light guide body, enabling compact device design while maintaining uniform illumination
2Illumination intensity
If diffusing material is contained in the light guide body to promote light diffusion, then light brightness uniformity is improved, but light attenuation increases
Solution Approach 1:
The patent completely removes the diffusing material from the device structure. Instead of relying on diffusing material to achieve uniform light distribution, the invention uses optical reflection principles with reflective surfaces on the circuit board and lens inner surface to redirect and evenly distribute light, eliminating light attenuation caused by diffusing material
Solution Approach 2:
The patent replaces the mechanical/diffusive light distribution mechanism (diffusing material in light guide body) with an optical reflection mechanism (reflective surfaces on circuit board and lens). This substitution reduces light attenuation while achieving uniform light distribution across the device surface
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 enables a compact illuminating device that uniformly emits light across its entire surface, reducing light attenuation and increasing luminous efficiency by effectively redirecting and spreading light through the gap between the case and lens.
Implementation Method 1
a lens that is located substantially parallel to the light-source optical axis such that a surface of the lens faces the light-source optical axis, the lens extending to a position rearward of the light source
Implementation Method 2
a light reflecting portion located so as to be opposed to a front side of the light source, the light reflecting portion being adapted to reflect emitted light of the light source obliquely rearward of the light source, and reflect the emitted light toward the lens
Data Source
AI summary
An illuminating device includes a light source having a light-source optical axis, a lens that is located substantially parallel to the light-source optical axis such that a surface of the lens faces the light-source optical axis, the lens extending to a position rearward of the light source in a direction of the light-source optical axis, and a light reflecting portion located so as to be opposed to a front side of the light source, the light reflecting portion being adapted to reflect emitted light of the light source obliquely rearward of the light source, and reflect the emitted light toward the lens.