Lens Module Mounting Bracket with Diffusing Reflection Structures

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Solution Overview

Problem

In electronic devices, strong light reflections within the mounting bracket of lens modules can cause image stains due to stray light hitting the sensor, leading to reduced imaging quality, and current solutions like increased ink printing for light absorption increase production costs and module size.

Innovation Solution

The lens module incorporates a mounting bracket with a reflecting surface featuring diffusing reflection structures, such as screw threads, that redirect external light from the non-photosensitive area to the sensor, preventing stray light from entering and enhancing image quality without increasing the filter size or production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If ink printing is increased at the edge of the filter to prevent light from entering the mounting bracket, then light blocking effect is improved, but the size of the filter and production cost increase

Engineering Contradiction:

Improvelight blocking effectVSAvoidfilter size

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The patent extracts the light blocking function from the filter by introducing a separate light blocking structure (mounting bracket with diffusing reflection structures) that performs the light blocking function independently, allowing the filter to maintain its original size without additional ink printing

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The mounting bracket acts as an intermediary element between the filter and the sensor, using diffusing reflection structures to redirect stray light away from the sensor before it can cause image stains, thereby solving the light blocking problem without modifying the filter

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If ink printing is increased at the edge of the filter to prevent light from entering the mounting bracket, then light blocking effect is improved, but production cost increases

Engineering Contradiction:

Improvelight blocking effectVSAvoidproduction cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent extracts the light blocking function from the filter manufacturing process and implements it through a separate mounting bracket structure, eliminating the need for additional ink printing costs while maintaining effective light blocking

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses a simple mounting bracket structure with diffusing reflection features that can be manufactured using conventional techniques, replacing the need for expensive additional ink printing while achieving the same light blocking effect

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Object-generated harmful factors

If the lens module uses conventional light blocking methods, then stray light is reduced, but image quality is further reduced due to dark angle

Engineering Contradiction:

Improvestray lightVSAvoidimaging quality

Core Design Contradiction:

Object-generated harmful factorsVSManufacturing precision

Solution Approach 1:

The patent converts the potentially harmful stray light into a beneficial effect by using diffusing reflection structures that redirect light at angles away from the sensor, preventing image stains while avoiding the dark angle problem associated with conventional blocking methods

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

Instead of directly blocking light with opaque materials that create dark angles, the patent inverts the approach by using diffusing reflection structures to redirect light away from the sensor, achieving light blocking without creating dark zones in the image

Inventive Principle:

Principle #13The other way round (Inversion)

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 solution effectively diffuses and reflects external light away from the sensor, improving imaging quality by preventing stray light from causing image stains, thus maintaining high image quality without increasing the filter size or production costs.

Implementation Method 1

a reflecting surface, configured to reflect external light from the non-photosensitive area to the sensor

Methodology Applied

Scientific EffectDiffusion reflection: Reflection

Implementation Method 2

The reflecting surface is provided with a plurality of diffusing reflection structures, such as screw threads

Methodology Applied

Scientific EffectDiffusion: Diffusion

Data Source

PatentUS11022730B2Lens module with improved image quality and electronic device with the same

Publication Date: 2021.06.01 TRIPLE WIN TECH (SHENZHEN) CO LTD

AI summary

A lens module with enhanced absorption of stray light includes a sensor and a mounting bracket. The sensor includes a photosensitive area and a non-photosensitive area arranged surrounding the photosensitive area. The sensor is received in the mounting bracket and a window is defined in the mounting bracket. An annular flange extends from an inner wall of the window towards a center axis of the window. The annular flange includes a reflecting surface facing away from the inner wall of the window and tilted towards the sensor. The photosensitive area is exposed in a through hole of the annular flange. Diffusing reflection structures are formed on the reflecting surface and are configured to diffuse light incident on the non-photosensitive area away from the photosensitive area.