Light-emitting-and-receiving element module with inclined intermediate wall
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Solution Overview
Problem
Existing sensor devices face challenges in enhancing sensing performance due to light interference from gaps between the substrate and light-intercepting walls, which affects the detection of illumination objects.
Innovation Solution
A light-emitting-and-receiving element module with a semiconductor substrate housing, where light-emitting and light-receiving elements are integrated on the substrate, and an intermediate wall with inclined surfaces is used to minimize light interference by directing stray light away from the receiving elements, improving the module's structural integrity and sensing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light-intercepting wall is used to separate light-emitting and light-receiving regions, then light interference is reduced, but gaps between the substrate and light-intercepting wall cause stray light leakage
Solution Approach 1:
The patent converts the harmful stray light that leaks through gaps into a beneficial effect by introducing inclined surfaces on the light-intercepting wall. These inclined surfaces redirect the stray light toward the light-receiving element at controlled angles, transforming the interference into a supplementary light source that enhances detection capability while maintaining structural simplicity
Solution Approach 2:
The patent addresses the two-dimensional gap problem by introducing a third-dimensional solution through inclined surfaces on the light-intercepting wall. The inclination angle is specifically designed to redirect light in three-dimensional space, preventing stray light from directly reaching the light-receiving element while allowing controlled light paths
2Device complexity
If light-emitting and light-receiving elements are integrated on the same substrate, then device compactness is improved, but light interference from the light-emitting region affects the light-receiving element
Solution Approach 1:
The patent divides the internal space of the housing into distinct light-emitting and light-receiving regions using a light-intercepting wall. This segmentation physically separates the two functional areas, preventing direct light interference while maintaining the integrated compact structure on the same substrate
Solution Approach 2:
The light-intercepting wall acts as an intermediary element between the light-emitting and light-receiving regions. It selectively blocks direct light paths while allowing the inclined surfaces to mediate controlled light redirection, serving as a buffer that manages light interaction between the two elements
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 effectively reduces stray light incidence on the light-receiving elements, enhancing the sensor device's sensitivity and reliability by optimizing the placement and design of the light-emitting and receiving elements within the module.
Implementation Method 1
a light-emitting element (3a) and a light-receiving element (3b) on a top surface (2a) of the substrate (2)
Implementation Method 2
detect characteristics of an illumination object by applying light from a light-emitting element to the illumination object and by causing a light-receiving element to receive specularly reflected light and diffusely reflected light from the illumination object
Implementation Method 3
the lower surface of the light shielding wall has an inclined surface inclined with respect to the upper surface of the substrate
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3
AI summary
A light-emitting-and-receiving element module 1 comprises a substrate 2 that comprises a top surface 2a; a light-emitting element 3a on the top surface 2a of the substrate 2; a light-receiving element 3b on the top surface 2a of the substrate 2 and apart from the light-emitting element 3a; and an intermediate wall 5 between the light-emitting element 3a and the light-receiving element 3b, the intermediate wall 5 comprising a lower surface 5c disposed apart from the top surface 2a. The lower surface 5c of the intermediate wall 5 has a protruding shape.