Liquid Crystal Display Heater Line Layout for Low-Temperature Response

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Solution Overview

Problem

The performance of display devices deteriorates due to the decrease in liquid crystal response speed at lower ambient temperatures, leading to decreased luminance and potential color shifting in the displayed images.

Innovation Solution

Incorporation of a heater line made of metal, positioned to overlap with and extend along the source line of the display panel, which applies heat to improve the liquid crystal response speed and maintain image quality in low-temperature environments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the ambient temperature becomes lower, then the liquid crystal response speed decreases, but the display device performance deteriorates

Engineering Contradiction:

Improveliquid crystal response speedVSAvoiddisplay device performance

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent changes the temperature parameter of the liquid crystal layer by introducing a heater line that applies heat to the liquid crystal layer, thereby improving the response speed at low ambient temperatures and maintaining display performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces a heater line as an intermediary component between the temperature environment and the liquid crystal layer, which mediates the thermal effect to improve response speed without directly modifying the liquid crystal material

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If a heater is introduced to improve liquid crystal response speed, then the response speed improves, but scattered light increases and contrast decreases

Engineering Contradiction:

Improveliquid crystal response speedVSAvoidscattered light

Core Design Contradiction:

SpeedVSObject-generated harmful factors

Solution Approach 1:

The heater line is positioned in the peripheral region outside the display region, applying heat locally to the liquid crystal layer without being visible in the display area, thus improving response speed while avoiding scattered light and contrast degradation

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The heater line is arranged in the peripheral region rather than within the display region, utilizing the spatial dimension outside the visible area to provide heating function without affecting optical quality in the display region

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 heater line enhances the liquid crystal response speed, preventing brightness decrease and color shifting, while minimizing scattered light and maintaining contrast.

Implementation Method 1

a heater line containing metal

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS20260079364A1Display device

Publication Date: 2026.03.19 JAPAN DISPLAY INC

AI summary

A display device includes a heater line containing metal, a first substrate including a first line, a second substrate facing the first substrate, and a liquid crystal layer provided between the first substrate and the second substrate, and the heater line is provided so as to overlap with a position of the first line and extend along the first line in plan view.