OLED Illumination Module Dynamic CCT Control
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Solution Overview
Problem
Current OLED illumination technology faces challenges in cost and lifespan, limiting its adoption despite offering advantages like high color rendering index, adjustable brightness, and low heat emission. There is a need to enhance OLED illumination systems by coordinating OLED element design, driving circuit design, and lighting design to match user themes and demands for dynamic light emission characteristics.
Innovation Solution
An OLED apparatus comprising an OLED illumination module, a driving unit, an optical sensing module, and a control unit that adjusts voltage and duty cycle of pulse width modulation to change correlated color temperature (CCT) and light intensity, utilizing multiple emitting layers and transport layers to achieve dynamic color temperature and luminance adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If OLED illumination technology is used to provide high color rendering index and adjustable brightness, then lighting quality is improved, but cost and lifespan are worsened
Solution Approach 1:
The patent implements dynamic control of OLED illumination by adjusting voltage and PWM duty cycle in real-time based on feedback from optical sensors and user preferences. The system dynamically changes light intensity and color temperature (CCT) to adapt to different environmental conditions and user needs, transforming a static lighting system into a dynamic one that optimizes performance and extends operational life through adaptive operation.
Solution Approach 2:
The system changes multiple operating parameters simultaneously - voltage level, PWM duty cycle, and resulting optical parameters (intensity and CCT). By controlling the OLED device through multiple parameters rather than a single fixed state, the system can optimize lifespan by operating at lower voltages when full brightness is not needed, while still providing high-quality illumination when required.
2Adaptability or versatility
If voltage and duty cycle are adjusted to change CCT and light intensity, then adaptability is improved, but device complexity is worsened
Solution Approach 1:
The system incorporates feedback mechanisms where optical sensors monitor the actual light output and environmental conditions, and this information is fed back to the control unit. The control unit then adjusts voltage and PWM duty cycle based on this feedback to achieve desired lighting conditions. This closed-loop feedback system manages the complexity by using sensor data to automatically optimize parameters without requiring complex manual control mechanisms.
Solution Approach 2:
The control unit serves multiple functions: it processes sensor data, determines optimal operating parameters, generates PWM signals, and adjusts voltage output. By consolidating these diverse control functions into a single multi-functional control unit, the system achieves high adaptability while managing overall device complexity through functional integration rather than proliferation of separate 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
Enables precise control over CCT and light intensity, enhancing the OLED illumination system's applicability and user experience by allowing for targeted adjustments, thereby improving market competitiveness and user satisfaction.
Implementation Method 1
organic light-emitting diode (OLED) element has Lambertian planar light source characteristic, light intensity thereof from any point view is soft
Data Source
AI summary
An organic light-emitting diode (OLED) apparatus includes at least one OLED illumination module, a driving unit, an optical sensing module, a control unit, and a storage unit. The driving unit is configured to adjust voltage applied to the OLED illumination module, so as to change a CCT of the OLED illumination module. The optical sensing module is configured to sense the light emitted by the OLED illumination module. The control unit is configured to receive a feedback signal from the optical sensing module so as to adjust a light intensity and the CCT of the OLED illumination module. The storage unit is configured to store photoelectric parameter data of the OLED illumination module. The control unit is configured to adjust the CCT and the light intensity of the OLED illumination module to target values according to the photoelectric parameter data.