LCD Temperature Sense Pattern Integration
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Solution Overview
Problem
Current LCD devices face challenges in maintaining image quality and operational reliability across varying temperatures due to difficulties in aligning liquid crystal molecules and measuring the precise temperature of the LCD panel, which affects the display's performance and manufacturing costs.
Innovation Solution
Incorporating a temperature sense pattern with a thin film transistor structure within the non-display area of the LCD panel, formed from materials like chrome, aluminum, or copper, which changes resistivity with temperature, allowing for internal temperature measurement without additional processing steps and reducing the need for external temperature sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is added to measure the LCD panel temperature, then temperature measurement capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the temperature sensing function with the existing thin film transistor structure by incorporating a temperature sense pattern formed from the same metal layer (Aluminum, Copper, or Chrome) used for gate and data lines. This integration eliminates the need for separate temperature sensor components and reduces device complexity while maintaining measurement capability.
Solution Approach 2:
The metal layer serving as gate and data lines is given a dual function: it acts as both the circuit conductor and the temperature sensing element. By utilizing the temperature-dependent resistivity特性 of the existing metal layer, the system achieves multi-functionality without adding extra components.
2Measurement precision
If a temperature sensor is added to measure the LCD panel temperature, then temperature measurement capability is improved, but manufacturing cost increases
Solution Approach 1:
The temperature sensing function is merged into the existing metal layer structure, eliminating the need for separate temperature sensor components and their associated manufacturing processes. This integration reduces material costs and simplifies production.
Solution Approach 2:
The existing metal layer is assigned a dual role as both circuit conductor and temperature sensor, maximizing the utility of already-present materials and avoiding additional material costs for dedicated temperature sensing components.
3Illumination intensity
If liquid crystal molecules are aligned using induced electric field, then image display function is improved, but temperature-dependent alignment precision deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the temperature sense pattern continuously monitors the panel temperature, and the controller uses this information to adjust the voltage applied to pixel electrodes. This compensation approach maintains alignment precision across varying temperatures by dynamically adapting the driving voltage based on real-time temperature data.
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
This solution enables precise temperature measurement and compensation within the LCD panel, enhancing image quality and operational reliability across a wide temperature range while reducing manufacturing costs by integrating temperature sensing directly into the panel's structure.
Implementation Method 1
a temperature sense pattern provided within the non-display area of the liquid crystal display panel
Data Source
AI summary
A liquid crystal display device includes a liquid crystal display panel having an effective area and a non-display area, and a temperature sense pattern provided within the non-display area of the liquid crystal display panel.