Display Device Temperature Detection Wiring Units
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Solution Overview
Problem
Existing display devices that project images on translucent members, such as glass, face issues with sunlight-induced deterioration and ineffective temperature detection due to the placement of temperature sensors outside the display region, which fails to account for changing sunlight incidence.
Innovation Solution
A display device with a substrate and a shield conductive layer, featuring wiring units for temperature detection that overlap with the display region, utilizing conductive thin wires and a resistance detection circuit to accurately detect temperature changes within the display area, preventing sunlight-induced deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the temperature sensor is disposed outside the display region, then the device structure is simplified and manufacturing is easier, but the temperature detection accuracy deteriorates because the sensor cannot detect the sunlight collected by the optical system
Solution Approach 1:
The patent transitions from detecting temperature at the periphery (outside display region) to detecting temperature within the display region itself by embedding wiring units directly in the display area. This dimensional shift from external to internal detection enables accurate measurement of the actual heated state caused by concentrated sunlight.
Solution Approach 2:
The wiring units serve dual functions: they act as both shield conductive layers for electromagnetic shielding and as temperature detection elements. This multi-functionality eliminates the need for separate temperature sensors outside the display region, thereby improving detection accuracy while maintaining manufacturing simplicity.
2Device complexity
If the temperature sensor is disposed outside the display region, then the device complexity is reduced, but the reliability of temperature detection deteriorates under varying sunlight conditions
Solution Approach 1:
The patent implements temperature detection at the specific location where sunlight concentration occurs (within the display region) rather than using a general external sensor. This localized detection approach ensures reliable temperature monitoring under varying sunlight conditions by directly measuring the thermal state at the critical area.
Solution Approach 2:
The wiring units provide real-time temperature feedback from the display region to the control circuit, enabling the system to respond to actual thermal conditions. This feedback mechanism enhances detection reliability by continuously monitoring the heated state caused by optical concentration.
3Measurement precision
If wiring units for temperature detection are disposed at positions overlapping with the display region, then the temperature detection accuracy improves, but the device complexity increases
Solution Approach 1:
The patent combines the shield conductive layer and temperature detection wiring units into a single integrated structure within the display region. This merging approach enables temperature detection without adding separate components, thereby improving measurement precision while minimizing the increase in device complexity.
Solution Approach 2:
The wiring units perform multiple functions simultaneously: electromagnetic shielding and temperature detection. This multi-functionality allows the system to achieve accurate temperature monitoring within the display region without requiring additional dedicated temperature sensor components.
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 enables effective detection of temperature changes within the display region, improving the device's ability to handle sunlight exposure and maintaining display quality by accurately identifying and managing heat-related issues.
Implementation Method 1
Each wiring unit for temperature detection has one end coupled to a first wire and the other end coupled to a second wire to detect resistance that changes in accordance with a change in temperature, between the first wire and the second wire
Data Source
AI summary
According to an aspect, a display device includes: a substrate having a display region;a shield conductive layer provided above the substrate; and a plurality of wiring units for temperature detection disposed at positions overlapping with the display region and the shield conductive layer when seen in a plan view. Each wiring unit for temperature detection has one end coupled to a first wire and the other end coupled to a second wire to detect resistance that changes in accordance with a change in temperature, between the first wire and the second wire.