Luminaire Light Guide Element for Wide View Angle
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Solution Overview
Problem
Conventional LED lamps have a limited view angle of approximately 120°, which is smaller than that of incandescent bulbs, making it desirable to increase the view angle for improved illumination.
Innovation Solution
A luminaire design incorporating a lamp holder, a lamp cover, a light-emitting module, and a light guide element, where the light-emitting module is mounted on a platform part within the lamp holder, and the light guide element is shaped to transmit light beams laterally through the lamp cover, increasing the view angle by allowing light to be emitted in a wider direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional LED lamps are used, then power saving and long usage life are achieved, but the view angle is limited to approximately 120°
Solution Approach 1:
A light guide element is introduced as an intermediary component between the LED light source and the external environment. This light guide element redirects light beams that would normally emit upward to exit laterally through the lamp cover, thereby expanding the effective view angle without changing the LED itself, thus preserving the long usage life while improving the illumination angle.
2Shape
If the light guide element is designed with outer diameter longer than the platform part, then light beams can be transmitted laterally to increase view angle, but the device complexity increases
Solution Approach 1:
The light guide element is integrated with the platform part of the lamp holder, forming a unified structure. The light guide element is mounted directly on the platform part, and their combined design simplifies the overall structure while achieving the lateral light transmission function. This merging approach reduces the number of separate components and assembly steps, thereby limiting the increase in device complexity.
3Area of stationary object
If multiple light-emitting modules are arranged on the circuit board, then illumination coverage is improved, but the manufacturing precision requirement increases
Solution Approach 1:
Instead of expanding illumination coverage solely by adding more LED modules in the same plane (which would increase assembly complexity and precision requirements), the invention uses the light guide element to redirect light in a different spatial dimension - from upward emission to lateral emission. This dimensional change in light direction allows a single LED module to achieve broader illumination coverage without proportionally increasing manufacturing precision demands.
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 luminaire achieves a wider view angle of up to 160°, comparable to incandescent bulbs, by using a light guide element that directs light beams outwardly, enhancing the illumination coverage.
Implementation Method 1
the light guide element is shaped to allow light beams emitted from the LED to be transmitted out of the luminaire through the light guide element and the lamp cover in a lateral direction
Data Source
AI summary
A luminaire comprises a lamp holder, a lamp cover, a light-emitting module, and a light guide element. The lamp cover is assembled to the lamp holder to define an accommodating space therebetween. The lamp holder has a platform part protruding into the accommodating space. The light-emitting module is mounted to the platform part, and includes a circuit board and at least one LED disposed on the circuit board. The light guide element is mounted to the platform part, and covers the light-emitting module. The light guide element has an outer diameter longer than that of the platform part. The light guide element is shaped to allow light emitted from the LED to be transmitted out of the lamp cover through the light guide element in a lateral direction, and thus the view angle of the luminaire is increased.