Tilt-Adaptive Infrared Module Under a Transparent Cover Plate

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Solution Overview

Problem

The fixed emission direction of infrared modules in electronic devices, typically positioned at the top, results in a limited field of view (FOV) due to space constraints, necessitating a hole in the middle frame and use of a light guide column, which affects the infrared function's usability.

Innovation Solution

The infrared module is positioned under a transparent cover plate, allowing for adjustable emission direction adjustment via a processor-controlled adjustment apparatus with magnetic and coil interactions, enabling the module to adapt to device tilts and maintain a wider FOV.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the infrared module is disposed at the top of the body, then it is easy to use, but the field of view is limited due to space constraints and fixed emission direction

Engineering Contradiction:

Improveease of useVSAvoidfield of view

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The infrared module is made dynamically adjustable through a driving mechanism that can change the emission direction of the infrared ray. The processor controls the module to adjust the emergent direction based on the tilt angle detected by the sensor, transforming a static fixed-direction emitter into a dynamic adaptive system that maintains optimal performance across different device orientations.

Inventive Principle:

Principle #15Dynamics

2Ease of manufacture

If a hole is drilled on the middle frame with a light guide column, then the infrared ray can be conducted out, but the size of the hole is limited by space, resulting in limited field of view

Engineering Contradiction:

Improveinfrared ray conductionVSAvoidfield of view

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The light guide column and hole structure are completely removed from the system. The infrared module is repositioned to emit infrared rays directly through the transparent cover plate, eliminating the intermediate light guide column component. This extraction simplifies the structure, removes manufacturing constraints related to hole size and light guide column fabrication, and maximizes the field of view.

Inventive Principle:

Principle #2Taking out (Extraction)

3Device complexity

If the infrared module has a fixed emission direction, then the structure is simple, but the emission distance is affected by device tilt angle

Engineering Contradiction:

ImprovestructureVSAvoidemission distance

Core Design Contradiction:

Device complexityVSLength of moving object

Solution Approach 1:

The system transitions from a static fixed-direction infrared emitter to a dynamic adjustable emitter. When the sensor detects that the device is tilted beyond a threshold angle, the processor activates the driving mechanism to adjust the infrared module's emission direction, compensating for the tilt and maintaining effective emission distance without significantly increasing overall structural complexity.

Inventive Principle:

Principle #15Dynamics

4Adaptability or versatility

If the infrared module is disposed under the transparent cover plate, then the field of view is enlarged, but the emission direction needs to be adjustable to overcome device tilt impact

Engineering Contradiction:

Improvefield of viewVSAvoidemission direction adjustment

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The mechanical adjustment system is designed with a driving mechanism that can be controlled electronically by the processor. This substitution of simple mechanical control for complex mechanical structures allows the infrared module to be positioned under the transparent cover plate with adjustable emission direction, achieving both enlarged field of view and tilt compensation without excessive structural complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 configuration enhances the infrared module's FOV and emission distance by dynamically adjusting the emission direction, overcoming limitations imposed by device tilts and maintaining effective control range without the need for a light guide column.

Implementation Method 1

adjustment apparatus with magnetic and coil interactions

Methodology Applied

Scientific EffectMagnetic interaction: Magnetism

Implementation Method 2

adjustment apparatus with magnetic and coil interactions

Methodology Applied

Scientific EffectElectromagnetic interaction: Electromagnetic Induction

Data Source

PatentUS20260025455A1Electronic device and control method therefor, and infrared module

Publication Date: 2026.01.22 HUAWEI TECH CO LTD

AI summary

An electronic device, a control method, and an infrared module are provided. The electronic device includes a middle frame, a housing, a processor, and an infrared module. The housing is fitted onto the middle frame. The processor and the infrared module are positioned in an accommodation space formed by the housing and the middle frame. The housing includes a cover plate, and the infrared module is positioned under the cover plate. In response to a tilt of the electronic device in a pitch direction, the processor is configured to adjust an emergent direction, relative to the cover plate, of an infrared ray emitted by the infrared module.