OLED Thermoelectric Sensor Integration for Temperature Monitoring
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Solution Overview
Problem
Existing optoelectronic component systems, such as OLEDs, face challenges in accurately measuring temperature and luminance due to external sensors that can influence heat flow and aesthetics, and are prone to errors in adhesive thickness and positioning, leading to potential overheating and safety issues.
Innovation Solution
An optoelectronic component apparatus with a thermoelectrically sensitive section integrated directly over the heat-generating layers of the OLED, allowing for accurate temperature measurement and compensation of luminance fluctuations, while maintaining a sleek appearance by eliminating the need for external sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external temperature sensors are adhesively bonded on the OLED surface, then temperature measurement is enabled, but the measurement accuracy is compromised due to local heat flow influence and adhesive thickness variations
Solution Approach 1:
The temperature sensor is merged with the OLED structure by integrating it into the encapsulation layer or substrate, eliminating the need for external adhesive bonding. This integration ensures direct thermal contact with the heat-generating layers without introducing external thermal resistance or disturbance, thereby improving measurement accuracy while avoiding heat flow distortion.
Solution Approach 2:
The encapsulation layer or substrate serves as an intermediary thermal pathway between the heat-generating OLED layers and the temperature sensor. This intermediary structure provides a controlled thermal conduction path that accurately reflects the OLED's operating temperature without being influenced by external environmental factors or adhesive variations.
2Reliability
If external temperature sensors are used, then temperature monitoring is achieved, but the aesthetic appearance is degraded due to visible sensors and adhesive bonding
Solution Approach 1:
The temperature sensor is merged into the OLED's encapsulation layer or substrate, making it invisible from the external view. This integration maintains the sleek, uniform aesthetic appearance of the OLED while preserving full temperature monitoring functionality through the integrated sensor's thermal coupling with the heat-generating layers.
3Measurement precision
If temperature sensors are positioned close to heat-generating layers, then measurement accuracy improves, but the sensors become susceptible to overheating and potential damage
Solution Approach 1:
The encapsulation layer or substrate acts as a thermal intermediary that conducts heat from the OLED's heat-generating layers to the temperature sensor. This intermediary structure allows the sensor to be positioned close to the heat source for accurate measurement while the larger thermal mass of the encapsulation/substrate protects the sensor from immediate thermal damage and provides thermal stability.
4Ease of manufacture
If adhesive bonding is used for sensor attachment, then mounting is simplified, but measurement accuracy is compromised due to adhesive thickness variations
Solution Approach 1:
The temperature sensor is merged into the OLED structure during the encapsulation process, eliminating the need for separate adhesive bonding steps. This integration ensures consistent thermal contact without adhesive thickness variations, improving measurement accuracy while maintaining manufacturing simplicity through process integration.
Solution Approach 2:
The encapsulation layer or substrate serves as a permanent thermal intermediary that is inherently bonded to both the OLED layers and the temperature sensor. This intermediary eliminates the need for additional adhesives, providing stable and accurate thermal coupling throughout the device's operational life.
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 monitoring and adaptive power management, enhancing the safety and efficiency of OLEDs by integrating temperature sensing within the component without altering its external appearance or affecting heat transfer.
Implementation Method 1
the thermoelectrically sensitive section has a first electrical conductivity at a first temperature and a second electrical conductivity at a second temperature
Data Source
AI summary
Various embodiments may relate to an optoelectronic component apparatus, including a carrier, an optoelectronic component and a thermoelectric component on or above the carrier. The optoelectronic component has a planar, optically active region. The thermoelectric component has at least one thermoelectrically sensitive section, wherein the thermoelectrically sensitive section has a first electrical conductivity at a first temperature and a second electrical conductivity at a second temperature, and wherein the thermoelectrically sensitive section is thermally connected to the optoelectronic component in a planar fashion. The thermoelectric component is formed as a temperature sensor and/or thermogenerator.