OLED Cooling Control for High-Output Phototherapy Panels
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Solution Overview
Problem
Existing OLED devices used in phototherapy face issues such as high heat generation leading to burns, tissue deformation, and light quenching due to increased power, and are not flexible enough for curved body parts.
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 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 patent converts the harmful heat generated by OLED into a beneficial cooling effect by using the heat to drive a Peltier element that actively cools the OLED. The heat sink and fan system dissipates this heat, allowing the OLED to operate at high power levels without causing burns or tissue deformation, thus transforming the harmful thermal byproduct into a useful cooling mechanism.
Solution Approach 2:
The patent introduces a cooling system as an intermediary between the OLED and the user's skin. This cooling system, comprising a Peltier element, heat sink, and fan, acts as a thermal mediator that removes excess heat from the OLED before it can be transferred to the skin, enabling high light output without direct thermal harm to the user.
2Illumination intensity
If power is increased to compensate for light loss in light conversion film, then light output is improved, but light quenching occurs reducing light output
Solution Approach 1:
The patent converts the harmful effect of heat-induced light quenching into a benefit by using active cooling to maintain the OLED at optimal operating temperatures. The cooling system prevents thermal quenching, allowing the OLED to operate at high power levels continuously without the light output degradation that would otherwise occur, thus enabling sustained high-efficiency phototherapy.
3Object-affected harmful factors
If cooling system is added to reduce heat generation, then harmful heat effects are reduced, but device complexity increases
Solution Approach 1:
The patent merges the cooling function with the existing OLED structure by integrating the Peltier element directly with the OLED module. The heat sink and fan are combined into a unified cooling assembly that works together with the OLED housing, creating a compact integrated system that reduces heat without requiring a completely separate complex cooling infrastructure.
Solution Approach 2:
The cooling system is designed to be self-regulating through feedback control. The temperature sensor continuously monitors the OLED temperature, and the control unit automatically adjusts the cooling system operation accordingly, allowing the system to self-regulate thermal conditions without requiring complex manual control mechanisms or excessive system complexity.
4Adaptability or versatility
If OLED is made flexible for curved body parts, then adaptability is improved, but manufacturing precision may be compromised
Solution Approach 1:
The patent employs flexible OLED structures and thin-film encapsulation layers that allow the device to bend and conform to curved body surfaces. The flexible substrate and thin-film cooling elements maintain structural integrity while enabling curvature, allowing precise manufacturing of flexible components that can adapt to various body shapes without compromising operational precision.
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 provides high light output without skin damage, allows temperature and light output adjustment, and can be used on curved body parts, improving phototherapy efficacy and efficiency.
Implementation Method 1
The cooling element is a Peltier element
Implementation Method 2
the cooling system further includes a heat sink and a fan for dissipating heat generated in the cooling element
Implementation Method 3
the cooling system further includes a heat sink and a fan for dissipating heat generated in the cooling element
Implementation Method 4
the cooling system further includes a heat sink and a fan for dissipating heat generated in the cooling element
Implementation Method 5
OLED light sources are being used in phototherapy
Data Source
AI summary
The present disclosure relates to an OLED device with cooling system 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 for measuring a temperature of the OLED or of an area adjacent to the OLED, and a control unit 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.