Display Region Temperature Wiring for Sunlight Heat Detection
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Solution Overview
Problem
Existing display devices, such as head-up displays (HUDs), face challenges in detecting partial heat generation within the display region without compromising the transmittance of the display area, especially when exposed to sunlight condensed by an optical system.
Innovation Solution
The display device incorporates a substrate with a display region and a plurality of temperature detection wiring lines, where each wiring line is a conductive thin line overlapping with the display region and extending along a light shielding layer, allowing for the detection of partial heat generation without obstructing the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a temperature sensor is arranged outside the display region, then the display region transmittance is maintained, but the sensor cannot detect sunlight condensed by the optical system
Solution Approach 1:
The display region is divided into multiple segments, each containing transparent wiring lines that serve as both display elements and temperature sensors. This segmentation allows temperature detection within the display region while maintaining overall transmittance, as each segment contributes to both functions simultaneously.
Solution Approach 2:
The transparent wiring lines perform multiple functions: they serve as conductive elements for the display function and simultaneously act as temperature sensors for detecting sunlight exposure. This multi-functionality eliminates the need for separate sensors outside the display region, enabling both high transmittance and accurate temperature detection.
2Measurement precision
If temperature detection wiring lines are arranged in the display region, then partial heat generation can be detected, but the wiring lines may obstruct the display
Solution Approach 1:
The wiring lines are designed with locally differentiated properties: they are transparent in the display region to maintain transmittance, and conductive for temperature detection. This local quality variation allows the wiring lines to function as both display elements and sensors without obstruction, as their transparency matches the surrounding display pixels.
Solution Approach 2:
The wiring lines undergo parameter changes in their optical properties - they are designed to be transparent at visible light wavelengths while maintaining electrical conductivity. This parameter change enables them to be imperceptible in the display region while still functioning as effective temperature sensors for detecting partial heat generation.
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 configuration enables effective detection of partial heat generation within the display region without lowering the transmittance, thus protecting the display device from potential damage caused by sunlight exposure.
Implementation Method 1
a plurality of temperature detection wiring lines each having a conductive thin wiring line arranged at a position overlapping with the display region in plan view
Data Source
AI summary
According to an aspect, a display device includes: a substrate having a display region; and a plurality of temperature detection wiring lines each having a conductive thin wiring line arranged at a position overlapping with the display region in plan view. A light shielding layer is arranged so as to extend in a first direction in the display region, and the conductive thin wiring line is arranged at a position overlapping with the light shielding layer and extends in the first direction along the light shielding layer in plan view.