Display Power Supply Circuit for Uniform Heat Management

Solution Overview

Problem

Display devices experience uneven display quality due to varying heat generation in different regions of the display panel, leading to deterioration of light-emitting elements and non-uniform illumination.

Innovation Solution

A display device design featuring a power supply circuit with varying densities of power lines and strategically placed openings, along with a temperature and current control module that adjusts power distribution based on temperature and current measurements to maintain uniform heating and prevent overheating.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If power supply voltage is supplied to the display panel, then the light-emitting elements can illuminate and display images, but heat is generated unevenly in different regions causing deterioration of light-emitting elements and uneven display quality

Engineering Contradiction:

Improvepower supply voltageVSAvoidheat generation

Core Design Contradiction:

PowerVSTemperature

Solution Approach 1:

The patent applies local quality by creating different portions of the power supply circuit with different power line densities. Specifically, the power supply circuit is divided into a first portion with a first density of power lines and a second portion with a second density of power lines, where the densities differ to compensate for regional heat generation variations. This allows each region to receive appropriate power distribution tailored to its thermal characteristics.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the parameter of power line density in different regions of the power supply circuit. By varying the density of power lines between the first and second portions, the patent adjusts the electrical resistance and current distribution to balance heat generation across different regions of the display panel, preventing localized overheating.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If power supply voltage is supplied to the display panel, then the display panel can function, but the light-emitting elements in regions generating more heat are deteriorated

Engineering Contradiction:

Improvedisplay panel functionVSAvoidlight-emitting element durability

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent applies local quality by creating different portions of the power supply circuit with different power line densities. Specifically, the power supply circuit is divided into a first portion with a first density of power lines and a second portion with a second density of power lines, where the densities differ to compensate for regional heat generation variations. This allows each region to receive appropriate power distribution tailored to its thermal characteristics.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the parameter of power line density in different regions of the power supply circuit. By varying the density of power lines between the first and second portions, the patent adjusts the electrical resistance and current distribution to balance heat generation across different regions of the display panel, preventing localized overheating.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If power supply voltage is supplied to the display panel, then the display panel can operate, but the display quality becomes uneven across different regions

Engineering Contradiction:

Improvedisplay panel operationVSAvoiddisplay quality uniformity

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies local quality by creating different portions of the power supply circuit with different power line densities. Specifically, the power supply circuit is divided into a first portion with a first density of power lines and a second portion with a second density of power lines, where the densities differ to compensate for regional heat generation variations. This allows each region to receive appropriate power distribution tailored to its thermal characteristics.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the parameter of power line density in different regions of the power supply circuit. By varying the density of power lines between the first and second portions, the patent adjusts the electrical resistance and current distribution to balance heat generation across different regions of the display panel, preventing localized overheating.

Inventive Principle:

Principle #35Parameter changes

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 prevents local overheating, maintains uniform display quality across the entire panel, and prolongs the lifespan of light-emitting elements by ensuring consistent power distribution and heat management.

Implementation Method 1

the first portion having a first density of the first power lines and/or of the second power lines and the second portion having a second density of the first power lines and/or of the second power lines

Methodology Applied

Scientific EffectElectrical Resistance: Electrical Resistance

Data Source

PatentUS11665939B2Display device

Publication Date: 2023.05.30 LG DISPLAY CO LTD

AI summary

The present disclosure relates to a display device capable of preventing light-emitting elements in a display panel from being deteriorated. A power supply circuit includes a plurality of first power supply lines each of which extends in a first direction and a plurality of second power supply lines each of which extends in a second direction intersecting the first direction, in which the second power supply lines are electrically connected with the first power supply lines.