Matrix Cooling Control for Display Panels With Burn-In and Heat Limits

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Solution Overview

Problem

Existing display devices suffer from heat generation, burn-in issues, and high power consumption, which affect the operating reliability and maximum luminance of the display panel.

Innovation Solution

Incorporation of a cooling panel with matrix-form cooling elements, driven by a driver and controlled by a timing controller, which varies cooling intensity based on data signals to reduce heat and adjust power consumption according to image characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cooling elements are added to reduce heat generation, then operating reliability is improved, but device complexity increases

Engineering Contradiction:

Improveoperating reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The cooling elements are integrated into the display panel structure by utilizing the same substrate and driving architecture. The cooling pixels share the same gate lines, data lines, and driving transistors as the display pixels, merging the cooling function with the display function in a unified structure rather than adding a separate cooling system.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The display panel substrate serves dual purposes: it functions as both the display medium and the cooling medium. The same thin film transistor structure that drives the light-emitting elements also drives the cooling elements, allowing one substrate to perform multiple functions - display and cooling - thereby reducing overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If cooling intensity is increased to reduce burn-in problems, then reliability is improved, but power consumption increases

Engineering Contradiction:

Improveburn-in resistanceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The cooling intensity is made dynamic rather than static. The driving current for cooling elements is adjusted in real-time based on the displayed image characteristics, such as luminance level and color information. During high-luminance periods, cooling intensity increases to prevent burn-in, while during low-luminance periods, cooling intensity is reduced to minimize power consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The operating parameters of cooling elements are changed based on thermal conditions and image data. The driving current magnitude is modified according to the luminance of displayed images, and cooling activation is adjusted based on real-time temperature monitoring, allowing the system to optimize the balance between burn-in prevention and power consumption.

Inventive Principle:

Principle #35Parameter changes

3Illumination intensity

If maximum luminance is increased to improve display performance, then image quality is improved, but heat generation increases

Engineering Contradiction:

Improvemaximum luminanceVSAvoidheat generation

Core Design Contradiction:

Illumination intensityVSTemperature

Solution Approach 1:

The cooling elements activate before and during the high-luminance display periods to preemptively manage heat generation. By monitoring image characteristics in advance, the system pre-cools the display panel during periods of expected high heat generation, such as during high-luminance video playback or static image display, preventing thermal accumulation before it causes damage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The heat generated by high-luminance display, which is normally a harmful effect, is converted into a useful signal for thermal management. The temperature increase from high-luminance operation triggers the cooling elements to activate, and the same thermal data is used to optimize cooling intensity, turning the harmful heat into a control parameter for preventing overheating.

Inventive Principle:

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

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 reduces heat generation and burn-in problems, increases maximum luminance, and minimizes power consumption by optimizing cooling based on image characteristics.

Implementation Method 1

a plurality of cooling elements disposed in a matrix form to cool the heat generated by the display panel

Methodology Applied

Scientific EffectHeat conduction: Conduction (thermal)

Data Source

PatentUS12562124B2Display device

Publication Date: 2026.02.24 LG DISPLAY CO LTD

AI summary

A display device includes a display panel configured to display an image, a plurality of cooling elements disposed in a matrix form to cool the heat generated by the display panel, a driver configured to drive the display panel and the cooling elements, and a timing controller configured to control the driver, wherein the timing controller is further configured to extract a data value for each area of the display panel based on a data signal and to generate a control signal for driving the cooling elements based on the data value.