Middle Frame Sound Channel Isolation to Prevent Display Yellow Spots

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Solution Overview

Problem

Existing electronic devices face issues with the 'yellow spot' phenomenon due to oil ingress through sound channels, affecting display quality and functionality.

Innovation Solution

A middle frame design with a partition plate and peripheral wall forms a sound channel isolated from the mounting cavity, featuring a sound inlet and outlet that is positioned to avoid contact with the display module, ensuring the sound channel is sealed and aligned with the display screen for optimal sound diffusion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the sound channel is positioned close to the display module to enable sound conduction, then sound quality is improved, but oil ingress occurs causing yellow spot phenomenon

Engineering Contradiction:

Improvesound qualityVSAvoidyellow spot phenomenon

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The middle frame is divided into a partition plate and a peripheral wall that form a sealed first mounting cavity, separating the sound channel into an isolated second mounting cavity. This segmentation prevents oil from the sound channel from contacting the display module while maintaining acoustic functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The partition plate acts as an intermediary barrier between the sound channel and the display module. It allows sound waves to pass through while blocking oil ingress, thus protecting the display module from harmful contamination.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the sound channel is isolated from the mounting cavity to prevent oil ingress, then yellow spot phenomenon is reduced, but sound conduction efficiency may be compromised

Engineering Contradiction:

Improveyellow spot phenomenonVSAvoidsound conduction

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The sound channel is nested within the middle frame structure as a separate second mounting cavity formed by the partition plate and peripheral wall. This nested configuration maintains acoustic pathways while providing protective isolation from the display module.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Ease of operation

If the first sound outlet is positioned on the peripheral wall to diffuse sound outward, then sound distribution is improved, but the complexity of the middle frame structure increases

Engineering Contradiction:

Improvesound distributionVSAvoidmiddle frame structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The peripheral wall serves multiple functions: it forms the boundary of the first mounting cavity, provides structural support, and houses the first sound outlet for sound diffusion. This multi-functionality reduces the need for additional separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260019488A1Middle frame of electronic device, processing method, and electronic device

Publication Date: 2026.01.15 HONOR DEVICE CO LTD

AI summary

A middle frame of an electronic device and the electronic device. The electronic device may include a handheld device, an in-vehicle device, a wearable device, a terminal device, or be connected to any one of a wireless modem, a cellular phone, a smartphone, a personal digital assistant, a computer, a tablet computer, a handheld computer, or the like. In embodiments, a display module of the electronic device is located inside a first mounting cavity, a sound channel is relatively isolated from the first mounting cavity, and the sound channel is not communicated with the first mounting cavity. In this way, the display module is also relatively isolated from the sound channel, so that a medium like oil inside the sound channel is prevented from contacting the display module. This greatly reduces a probability of occurrence of a yellow spot phenomenon.