Flush Optoelectronic Package Structure for Slim Photo Interrupters
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Solution Overview
Problem
Conventional photo-interrupters used in electronic devices, such as gaming mice, face challenges in achieving a small and slim design due to their larger size and optical path, which affects speed and accuracy, and are prone to dust and dirt accumulation on protruded lenses.
Innovation Solution
An optoelectronic package structure with a housing encapsulating lead frames and an optoelectronic element, where the sealing element is flush with the housing surface, reducing the overall size and optical path, and incorporating a reflector cup to enhance light emission and reception efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If protruded lenses are used on light-emitting and light-receiving elements, then light emission and reception efficiency is improved, but overall device size and optical path length increase
Solution Approach 1:
The patent merges the light-emitting element and light-receiving element into a single integrated package structure, with both elements disposed on the same lead frame. This integration eliminates the need for separate housing for each element and allows the sealing element to flush with the housing surface, reducing overall size while maintaining optical efficiency through optimized internal light paths.
2Illumination intensity
If protruded lenses are used on light-emitting and light-receiving elements, then light emission and reception efficiency is improved, but the device becomes prone to dust and dirt accumulation
Solution Approach 1:
The patent merges the light-emitting element and light-receiving element into a single integrated package structure, with both elements disposed on the same lead frame. This integration eliminates the need for separate housing for each element and allows the sealing element to flush with the housing surface, reducing overall size while maintaining optical efficiency through optimized internal light paths.
3Reliability
If conventional photo-interrupter structure is used, then light emission and reception function is achieved, but optical path length is too long affecting response speed
Solution Approach 1:
The patent transitions from a conventional linear optical path arrangement to a three-dimensional integrated package structure. By disposing both light-emitting and light-receiving elements on the same lead frame with vertical stacking and optimized spatial arrangement, the optical path is shortened in the horizontal dimension while maintaining functional reliability through proper optical coupling.
4Reliability
If light-emitting and light-receiving elements are oppositely disposed in separate housings, then optical function is achieved, but device complexity and size increase
Solution Approach 1:
The patent merges the light-emitting element and light-receiving element into a single integrated package structure, with both elements disposed on the same lead frame. This integration eliminates the need for separate housing for each element and allows the sealing element to flush with the housing surface, reducing overall size while maintaining optical efficiency through optimized internal light paths.
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 reduces the size and optical path of the photo-interrupting device, enhances light emission and reception efficiency, and minimizes dust interference, improving response speed and accuracy.
Implementation Method 1
the optoelectronic element is configured to emit light or receive light
Implementation Method 2
the optoelectronic element is configured to emit light or receive light
Implementation Method 3
incorporating a reflector cup to enhance light emission and reception efficiency
Data Source
AI summary
An optoelectronic package structure and a photo-interrupting device are provided. The photo-interrupting device includes a casing and two optoelectronic package structures oppositely arranged. The optoelectronic package structure includes a housing, a first lead frame, a second lead frame, an optoelectronic element, and a sealing element. The optoelectronic element is disposed on the first lead frame and is electrically connected to the second lead frame through a conducting wire. The housing encapsulates one part of each of the first lead frame and the second lead frame. Another part of each of the first lead frame and the second lead frame correspondingly protrudes from one end of the housing having an opening arranged on a first surface, and the optoelectronic element is exposed through the opening. The sealing element covers the optoelectronic element, and a surface of the sealing element is not higher than the first surface of the housing.