Display Device Heat Dissipation via Electromagnetic Vibration

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Solution Overview

Problem

Heat generated by integrated circuits in display devices degrades image quality and reduces the durability of display panels and components, necessitating improved heat dissipation solutions.

Innovation Solution

A display device with a compact heat dissipation structure featuring a housing with conductive lines and a movable member electrically connected to these lines, allowing for efficient heat dissipation between the display panel and a bottom cover, without the use of noise-producing fans.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a heat dissipation fan is used to improve heat dissipation performance, then heat dissipation efficiency is improved, but noise is generated

Engineering Contradiction:
Improveheat dissipation performanceVSAvoidnoise
Core Design Contradiction:
TemperatureVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the mechanical heat dissipation fan system with an electromagnetic vibration system. A vibration element is driven by an electromagnetic driving unit to generate vibrations that propagate through the housing, creating acoustic waves that enhance heat dissipation without mechanical fan noise. This substitution eliminates the harmful noise while maintaining heat dissipation effectiveness.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes phase transition of acoustic energy to thermal energy dissipation. The vibration element generates mechanical vibrations that are converted into acoustic waves within the housing, and these acoustic waves subsequently convert to thermal energy through interaction with the housing walls and air molecules, achieving heat dissipation through a phase transition mechanism rather than direct fan airflow.

Inventive Principle:
Principle #36Phase transitions

2Volume of moving object

If the heat dissipation structure is made compact to reduce device size, then device compactness is improved, but heat dissipation efficiency may be reduced

Engineering Contradiction:
Improveheat dissipation structure sizeVSAvoidheat dissipation efficiency
Core Design Contradiction:
Volume of moving objectVSTemperature

Solution Approach 1:

The patent transitions from traditional three-dimensional space-consuming fan structures to a one-dimensional vibration propagation approach. The vibration element generates vibrations that propagate through the housing walls in a wave manner, utilizing the housing structure itself as the heat dissipation pathway. This dimensional change allows effective heat dissipation within a compact volume without requiring large airflow paths.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The housing structure serves multiple functions: it provides structural support, acts as a vibration transmission medium for heat dissipation, and functions as a resonating chamber for acoustic wave generation. By making the housing multi-functional, the patent eliminates the need for separate dedicated heat dissipation components, achieving compactness while maintaining heat dissipation efficiency.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

Enhances heat dissipation performance, improving image quality and durability of the display panel and its components while maintaining a low-noise operation.

Implementation Method 1

a movable member having both ends supported by and electrically connected to the conductive lines to thereby be movable in a longitudinal direction of the housing

Methodology Applied
Scientific EffectElectromagnetic force: Lorentz Force

Data Source

PatentUS11122716B2Display device
Publication Date: 2021.09.14 LG DISPLAY CO LTD
  • US11122716B2 patent drawing
  • US11122716B2 patent drawing
  • US11122716B2 patent drawing

AI summary

A display device includes a display panel, a bottom cover at a rear surface of the display panel, and a heat dissipation assembly. The heat dissipation assembly includes a housing between the display panel and the bottom cover, conductive lines on two lateral sides within the housing and configured to supply electricity therethrough, and a movable member having both ends thereof supported by and electrically connected to the conductive lines to thereby be movable in a longitudinal direction of the housing.