Light Distribution Element with Concave Reflecting Face
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Solution Overview
Problem
Current lighting lamps face challenges in achieving light emitting uniformity while maintaining low cost and high space utilization, as lateral entry type light guide plates require multiple light emitting units, increasing cost, and direct type plates occupy more space due to the arrangement of light emitting units below the light guide plate.
Innovation Solution
A light distribution element with a concave reflecting face and Fresnel surface is used, where the light source cavity is formed with the first face concaved towards the emitting face, allowing fewer light emitting units to be used below the light distribution element, optimizing light distribution and reducing overall space occupancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If lateral entry type light guide plates are used to achieve light emitting uniformity, then light distribution uniformity is improved, but the number of light emitting units increases which raises cost
Solution Approach 1:
The patent applies curvature by forming a light source cavity with a concave first face and equipping the light distribution element with a concave reflecting face. This curved geometric structure concentrates and redirects light rays from fewer LED units to achieve uniform light emission across the plate, resolving the contradiction between using fewer LEDs and maintaining uniformity.
Solution Approach 2:
The patent changes the geometric parameters of the light distribution system by introducing specific concave angles and Fresnel surface configurations. These parameter modifications enable the light rays to be redistributed uniformly across the plate surface, achieving uniform illumination with a reduced number of light emitting units.
2Quantity of substance
If direct type light guide plates are used to reduce cost by using fewer light emitting units, then cost is reduced, but space occupancy increases as light emitting units are arranged below the light guide plate
Solution Approach 1:
The patent transitions from a planar arrangement of LEDs below the light guide plate to a three-dimensional light source cavity structure. By forming LEDs within a concave cavity and using a concave reflecting face, the system achieves compact spatial arrangement that reduces overall space occupancy while maintaining the benefit of using fewer light emitting units.
3Ease of manufacture
If conventional light distribution elements are used to maintain simple structure, then manufacturing simplicity is improved, but light emitting uniformity deteriorates
Solution Approach 1:
The patent segments the light distribution element into distinct functional surfaces: a Fresnel surface for initial light redirection and a concave reflecting face for secondary redistribution. This segmentation allows each surface to perform a specific optical function, achieving uniform light emission while maintaining manufacturability through standardized molding processes.
Solution Approach 2:
The light distribution element integrates multiple optical functions into a single component: the Fresnel surface handles initial light redirection while the concave reflecting face provides secondary distribution. This multi-functionality achieves uniform light emission without requiring multiple separate components, maintaining manufacturing simplicity.
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 meets light emitting uniformity requirements with fewer light emitting units, reducing the cost of the lighting lamp and enhancing space utilization by evenly distributing light rays through the concave reflecting face and Fresnel surface.
Implementation Method 1
The incident face includes a Fresnel surface
Implementation Method 2
The emitting face includes a concave reflecting face, and the concave reflecting face is concaved towards a side where the incident face is located
Data Source
AI summary
The present disclosure discloses a light distribution element, a light source assembly and a lighting lamp. The light distribution element comprises a light source cavity, a first face, an incident face and an emitting face. The first face and the emitting face are arranged opposite to each other. The light source cavity is formed in a manner that the first face is concaved towards a side where the emitting face is located, the incident face is an inner surface of the light source cavity, and the incident face includes a Fresnel surface. The emitting face includes a concave reflecting face, and the concave reflecting face is concaved towards a side where the incident face is located.