Light Emitting Device Package Diagonal Electrode Separation
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Solution Overview
Problem
Existing light emitting device packages face challenges in maximizing luminous flux due to inefficient light reflection and absorption issues, particularly with the placement and orientation of light emitting devices and the Zener diode within the package.
Innovation Solution
A light emitting device package design featuring a body with a cavity, separated lead frames, and a Zener diode positioned closer to the electrode separating member, with the light emitting devices disposed parallel to the length direction and the Zener diode strategically located to minimize light absorption, along with varying inclination angles for improved reflection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the Zener diode is placed close to the light emitting devices for compact design, then device complexity is reduced, but light loss increases due to absorption by the Zener diode
Solution Approach 1:
The electrode separating member is configured at a diagonal angle relative to the light emitting devices, creating a spatial separation in a different dimension. This diagonal arrangement allows the Zener diode to be positioned close to the light emitting devices while maintaining adequate separation distance through three-dimensional spatial optimization, thus reducing light absorption loss while keeping the overall device compact.
2Ease of manufacture
If the inside surface of the body is made flat for simple manufacturing, then ease of manufacture is improved, but reflection efficiency deteriorates
Solution Approach 1:
The inside surface of the body is configured with an asymmetric inclined shape rather than a flat surface. This asymmetric inclination optimizes the reflection path of light emitted by the light emitting devices, directing more light towards the desired output direction and improving overall reflection efficiency while maintaining manufacturing feasibility through mold design.
3Device complexity
If the electrode separating member is positioned parallel to the lead frames for simple structure, then device complexity is reduced, but luminous flux decreases due to inadequate light separation
Solution Approach 1:
The electrode separating member is positioned diagonally rather than parallel to the lead frames, utilizing three-dimensional spatial arrangement to achieve better light separation between the first and second light emitting devices. This diagonal positioning in a different dimensional orientation allows each light emitting device to emit light more effectively without interference, thereby increasing overall luminous flux while maintaining structural 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 design enhances luminous flux by optimizing the arrangement of light emitting devices, the shape of the electrode separating member, and the location of the Zener diode, reducing light loss and improving reflection efficiency, resulting in improved light collection and distribution.
Implementation Method 1
the loss of light generated in the light emitting devices by the Zener diode may be prevented
Implementation Method 2
efficiency of reflection by a reflecting member formed on an inside surface of the body may be improved
Data Source
AI summary
Embodiments relate to a light emitting device package having an improved luminous flux, and the light emitting device package includes a body including a cavity, a first lead frame and a second lead frame exposed on a bottom surface of the cavity and separate from each other by an electrode separating member, a first light emitting device disposed on the first lead frame, a second light emitting device disposed on the second lead frame, and a Zener diode disposed on the first lead frame or the second lead frame, and disposed more closely to the electrode separating member than to the first light emitting device and the second light emitting device. Here, the electrode separating member diagonally separate the first lead frame and the second lead frame along a width direction of the body.