Display Device Temperature Detection Wires for Sunlight Heat
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Solution Overview
Problem
Head-up displays (HUDs) face challenges in distinguishing between temperature increases due to external sunlight condensed by an optical system and those from the surrounding environment, leading to potential display deterioration.
Innovation Solution
A display device with a substrate having a display region, temperature detection wires arranged to overlap with the display region, and light detection electrodes that allow for the detection of partial heat generation states, enabling the differentiation of sunlight-induced heat from environmental temperature increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is arranged outside the display region, then the device complexity is reduced, but the measurement precision of temperature detection cannot distinguish between sunlight-induced heat and environmental temperature increases
Solution Approach 1:
The temperature detection function is segmented into multiple temperature detection wires arranged at different positions within the display region. This allows independent detection of temperature at specific locations, enabling distinction between localized sunlight-induced heat and uniform environmental temperature changes.
Solution Approach 2:
The detection approach transitions from a single external temperature sensor to multiple temperature detection wires positioned at different spatial coordinates within the display region. This spatial dimensionality enables differentiation between localized and ambient temperature changes.
2Measurement precision
If temperature detection wires are arranged within the display region, then the measurement precision for detecting partial heat generation is improved, but the device complexity increases due to additional components
Solution Approach 1:
The temperature detection wires serve dual functions: they detect temperature changes within the display region and can be integrated with the display device's existing structure. This multi-functionality reduces the need for separate dedicated temperature sensing components, thereby limiting the increase in device complexity.
Solution Approach 2:
The temperature detection wires are merged with the display device structure, allowing temperature detection functionality to be integrated into the existing display region rather than adding completely separate external sensing components.
3Reliability
If multiple temperature detection wires are arranged in the display region, then the reliability of temperature monitoring is improved, but the manufacturing precision requirements increase
Solution Approach 1:
Temperature detection wires are strategically positioned at specific locations within the display region where temperature monitoring is most critical. This localized approach ensures reliable temperature monitoring while reducing the overall number of wires needed, thereby lowering manufacturing precision requirements compared to a fully distributed sensor array.
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
Accurately detects partial heat generation within the display region caused by external light, preventing potential deterioration and improving display quality by distinguishing sunlight-induced temperature increases from environmental changes.
Implementation Method 1
a temperature detection wire SM arranged at a position overlapping with the display region AA in plan view... a resistance value of the temperature detection wire SM changes in accordance with a temperature of a temperature detection region
Implementation Method 2
a light detection electrode LS... a resistance value of the light detection electrode LS changes in accordance with an amount of light incident on the light detection electrode LS
Data Source
AI summary
A display device comprising: a substrate having a display region; a plurality of temperature detection wires arranged at positions overlapping with the display region in plan view; and a light detection electrode overlapping with temperature detection regions of the temperature detection wires in plan view.