Embedded Shield Can IR Module for Compact Window Openings
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Solution Overview
Problem
The installation of an infrared light source module in electronic devices, such as smartphones, leads to an increase in the size of the window hole due to the need for a shielding member to block electromagnetic waves, compromising the aesthetic appearance.
Innovation Solution
An electronic device design incorporating a housing with light-transmitting areas and a shielding member to suppress electromagnetic waves while maintaining a compact form factor, featuring an infrared light emitter and receiver positioned to emit and receive infrared light through these areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding member is disposed to surround the infrared light source, then electromagnetic waves are blocked, but the separation distance between the infrared light source and cover glass is increased, thereby increasing the window hole size
Solution Approach 1:
The shielding member is embedded within the module housing rather than being disposed externally around the infrared light source. This nesting approach allows the shielding function to be integrated into the existing structure, blocking electromagnetic waves without increasing the overall window hole size.
Solution Approach 2:
The shielding member is positioned in the vertical dimension within the module housing, perpendicular to the light transmission path. This dimensional arrangement allows electromagnetic shielding to occur without expanding the horizontal window hole area, as the shielding occurs in the Z-axis direction rather than the X-Y plane.
2Power
If the infrared light source receives higher power, then sufficient power for depth information detection is obtained, but more electromagnetic waves are generated
Solution Approach 1:
The harmful electromagnetic waves generated by the high-power infrared light source are extracted and blocked by the shielding member, separating the useful infrared light function from the harmful electromagnetic radiation. This allows the infrared light source to operate at high power while the shielding member removes the unwanted electromagnetic interference.
Solution Approach 2:
The electromagnetic waves that are a byproduct of high-power operation are converted from a harmful effect into a managed phenomenon. The shielding member transforms the harmful electromagnetic radiation into a contained field, allowing the system to benefit from high-power operation while neutralizing the negative effects through strategic shielding placement.
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 suppresses electromagnetic wave generation while preventing an increase in window hole size, maintaining the device's aesthetic appearance and ensuring stable power supply for depth information detection.
Implementation Method 1
a shielding member (e.g., a shield can) for blocking electromagnetic waves emitted by the infrared light source may be disposed around the infrared light source
Implementation Method 2
an infrared light source and an infrared receiver to detect distance information about the object
Implementation Method 3
receive light reflected from the object, and detect depth information based on a time from an emission time to a reception time
Data Source
AI summary
The electronic device includes an infrared light emitter disposed on the printed circuit board, the infrared light emitter corresponding to a first light-transmitting area of the plurality of light-transmitting areas, and being configured to emit infrared light through the first light-transmitting area; and an infrared receiver corresponding to a second light-transmitting area of the plurality of light-transmitting areas. The infrared light emitter includes: a substrate including a third surface facing a third direction and a fourth surface facing a fourth direction opposite to the third direction; at least one electronic component including a light source disposed on the fourth surface of the substrate; a module housing surrounding the at least one electronic component of the substrate; and a shielding member disposed in the module housing, the shielding member being configured to shield electromagnetic waves.