OLED Cooling Control for High Light Output Without Skin Burns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OLED devices fail to provide high light output at temperatures lower than body temperature without causing damage due to heat generation, leading to issues like burns and reduced light output efficiency.
Innovation Solution
An OLED device with a cooling system, including a Peltier element, heat sink, and fan, controlled by a temperature sensor and control unit to maintain the OLED at a preset cooling temperature below body temperature, ensuring consistent light output and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If power is increased to achieve sufficient light output for phototherapy, then light output is improved, but heat generation increases causing burns and tissue deformation
Solution Approach 1:
The harmful heat generated by the OLED is extracted and removed from the system using a cooling system comprising a Peltier element, heat sink, and fan. This allows the OLED to operate at high power levels for sufficient light output while the cooling system actively removes the generated heat to prevent burns and tissue deformation.
Solution Approach 2:
The cooling system is activated before the OLED is driven to pre-cool the OLED to a preset temperature. This preliminary cooling action ensures that when high power is applied to achieve sufficient light output, the OLED starts from a lower temperature baseline, reducing the risk of excessive heat generation and harmful effects on tissue.
2Illumination intensity
If power is increased to compensate for light conversion film losses, then light output is improved, but light quenching phenomenon occurs damaging the light source
Solution Approach 1:
The cooling system is activated before the OLED is driven to pre-cool the OLED to a preset temperature. This preliminary cooling ensures that when high power is applied to compensate for light conversion film losses, the OLED operates from a lower temperature baseline, preventing the light quenching phenomenon that would otherwise damage the light source.
Solution Approach 2:
A temperature sensor continuously monitors the OLED temperature and provides feedback to the control unit. The control unit adjusts the cooling system operation and power application to the OLED based on this temperature feedback, ensuring the OLED operates within a safe temperature range that prevents light quenching while maintaining sufficient light output.
3Object-affected harmful factors
If cooling system is added to reduce heat, then heat generation is controlled, but device complexity increases
Solution Approach 1:
The cooling system is designed to serve multiple functions: it cools the OLED during operation, pre-cools the OLED before operation, and actively removes heat during high-power operation. This multi-functionality justifies the added complexity by providing comprehensive heat management across different operational phases.
Solution Approach 2:
The cooling system components are nested within each other in a compact arrangement: the Peltier element is positioned adjacent to the OLED, the heat sink is attached to the Peltier element, and the fan is integrated to blow air across the heat sink. This nested configuration minimizes the overall space required and reduces the apparent complexity of the system.
4Productivity
If OLED is cooled to below body temperature, then phototherapy efficacy is improved, but temperature control complexity increases
Solution Approach 1:
A temperature sensor continuously monitors the OLED temperature and provides feedback to the control unit. The control unit adjusts the cooling system operation and power application to the OLED based on this temperature feedback, automatically maintaining the OLED at the optimal preset temperature for phototherapy efficacy without requiring manual intervention or complex control mechanisms.
Solution Approach 2:
The system is designed to automatically regulate its own temperature through the feedback control mechanism. The temperature sensor and control unit work together to self-adjust the cooling system and power application, eliminating the need for external temperature control and simplifying the overall operation despite the presence of active cooling 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 OLED device achieves high light output without skin damage, allows easy temperature and light output adjustment, and enables close contact with curved body parts, improving phototherapy efficacy and efficiency.
Implementation Method 1
a cooling system including a cooling element for cooling the OLED
Implementation Method 2
a heat sink and a fan for dissipating heat generated in the cooling element
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The present disclosure relates to an OLED device (10) with cooling system (20) and driving method thereof, and the OLED device according to one embodiment of the present disclosure includes an OLED, a cooling system including a cooling element for cooling the OLED, a temperature sensor (30) for measuring a temperature of the OLED or of an area adjacent to the OLED, and a control unit (40) for controlling driving of the OLED and of the cooling system, wherein the control unit drives the cooling system prior to driving the OLED, and controls such that the OLED starts to be driven when the temperature measured by the temperature sensor is at or below a preset temperature.