Liquid Crystal Display Heater Feedback for Low-Temperature Visibility
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Solution Overview
Problem
Existing display apparatuses require improvements in performance, particularly in maintaining visibility and temperature control of liquid crystal displays to prevent luminance reduction and monochrome display due to low environmental temperatures.
Innovation Solution
Incorporating a heater with integrated temperature measurement and control circuitry, allowing for precise temperature regulation of the liquid crystal layer without additional sensors, thereby enhancing visibility and response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate temperature sensor is added to measure liquid crystal layer temperature, then temperature measurement precision is improved, but device complexity increases
Solution Approach 1:
The heater is designed to serve dual functions: heating the liquid crystal layer and measuring its temperature. By utilizing the heater's electrical resistance characteristics for temperature sensing, the invention eliminates the need for a separate temperature sensor, thereby reducing device complexity while maintaining measurement capability
Solution Approach 2:
The heater performs self-measurement of the liquid crystal layer temperature through its own electrical resistance changes. The measurement circuit detects resistance variations of the heater, which correlate with temperature, allowing the system to monitor temperature without external sensing components
2Stability of the object's composition
If the heater overlaps the liquid crystal layer region, then heating uniformity is improved, but visibility is worsened due to additional components in the optical path
Solution Approach 1:
The heater is constructed as a thin transparent conductive film deposited on the substrate. This thin-film structure provides sufficient heating capability while maintaining optical transparency, allowing light to pass through with minimal obstruction and preserving display visibility
Solution Approach 2:
The heater uses transparent conductive materials that combine electrical conductivity with optical transparency. This composite material approach enables the heater to function both as a heating element and as an optically transparent component, resolving the conflict between heating effectiveness and visibility
3Use of energy by moving object
If environmental temperature is low, then power consumption is reduced, but display performance deteriorates due to luminance reduction and monochrome display
Solution Approach 1:
The system implements temperature feedback control by continuously monitoring the liquid crystal layer temperature through the heater's resistance measurements. Based on the measured temperature, the control circuit adjusts the heater power to maintain optimal display temperature, ensuring reliable display performance while minimizing power consumption through precise control
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 ensures improved heating accuracy and visibility by using the heater to measure and adjust temperature, preventing luminance reduction and monochrome display, thus maintaining optimal display performance across varying environmental conditions.
Implementation Method 1
a heater having a terminal and overlapping a region where the liquid crystal layer is provided in plan view
Implementation Method 2
a measurement circuit having a terminal electrically connectable to the terminal of the heater... capable of measuring a resistance value of the heater
Data Source
AI summary
A performance of a display apparatus is improved. The display apparatus includes: a first substrate; a second substrate facing the first substrate; a liquid crystal layer provided between the first substrate and the second substrate; a heater having a terminal and overlapping a region where the liquid crystal layer is provided in plan view; a measurement circuit having a terminal electrically connectable to the terminal of the heater; a heater driving circuit having a terminal electrically connectable to the terminal of the heater; and a switch circuit, in which the switch circuit is capable of switching on and off of an electrical connection state between the terminal of the heater and the terminal of the measurement circuit and is capable of switching on and off of an electrical connection state between the terminal of the heater and the terminal of the heater driving circuit.