OLED Rear Lamp Voltage Stabilization Circuit
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Solution Overview
Problem
Existing rear combination lamps in vehicles face challenges in providing stable voltage to Organic Light Emitting Diodes (OLEDs) due to varying ambient temperatures, which affects their performance and reliability.
Innovation Solution
An input voltage stabilization circuit using a DC-DC converter and feedback mechanism to adjust the output voltage based on the highest voltage required by individual OLEDs, ensuring stable power supply and minimizing the impact of temperature variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If OLEDs are used in rear combination lamps, then the light intensity is reduced to avoid obstructing other drivers, but the voltage required by OLEDs varies with ambient temperature which complicates power supply stability
Solution Approach 1:
The patent implements a feedback mechanism where the DC-DC converter continuously monitors the voltage requirements of individual OLEDs and adjusts its output accordingly. The converter receives feedback signals from voltage detection circuits connected to each OLED, enabling dynamic voltage adjustment to maintain stable operation across varying temperature conditions while accommodating the reduced light intensity requirement of OLEDs.
Solution Approach 2:
The patent employs a dynamic voltage adjustment system where the DC-DC converter can change its output voltage in real-time based on ambient temperature variations and individual OLED characteristics. This dynamic capability allows the system to adapt to changing conditions without requiring manual intervention or fixed voltage settings, thereby maintaining reliability despite the temperature-sensitive nature of OLEDs.
2Device complexity
If a fixed voltage supply is used for multiple OLEDs, then the circuit design is simplified, but individual OLEDs with different voltage requirements cannot operate optimally
Solution Approach 1:
The patent segments the voltage supply system by implementing individual voltage detection and control for each OLED or OLED group. Instead of a single fixed voltage supply, the system divides the power distribution into multiple controllable channels, each capable of delivering the specific voltage required by individual OLEDs. This segmentation enables optimal performance for each diode while maintaining a manageable circuit architecture through modular design.
Solution Approach 2:
The patent utilizes parameter changes by allowing the voltage output to vary dynamically based on the specific requirements of each OLED. The DC-DC converter adjusts voltage parameters in real-time according to feedback from voltage detection circuits, enabling each OLED to operate at its optimal voltage point rather than forcing all diodes to operate at a fixed voltage level.
3Adaptability or versatility
If the DC-DC converter supplies voltage based on the highest requirement among OLEDs, then all OLEDs can be powered, but energy consumption increases
Solution Approach 1:
The patent applies local quality by providing customized voltage levels to different OLEDs or OLED groups based on their individual requirements. Instead of uniformly supplying the highest voltage to all diodes, the system tailors the voltage output to match the specific needs of each local segment (individual OLED or group), thereby reducing overall energy consumption while ensuring all components receive adequate power for operation.
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 solution provides a stable and efficient power supply to OLEDs in rear combination lamps, ensuring consistent performance across varying temperatures and reducing the risk of damage from voltage fluctuations.
Implementation Method 1
a Direct Current to Direct Current (DC-DC) converter configured to supply an output voltage for driving the plurality of OLEDs by raising or lowering a voltage of a main power supplied by a vehicle battery
Implementation Method 2
an optical output unit including a plurality of Organic Light Emitting Diodes (OLEDs)
Data Source
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AI summary
An input voltage stabilization circuit for a rear combination lamp is disclosed. The input voltage stabilization circuit includes an optical output unit including a plurality of Organic Light Emitting Diodes (OELDs), a Direct Current to Direct Current (DC-DC) converter configured to supply an output voltage for driving the plurality of OLEDs by raising or lowering a voltage of a main power supplied by a vehicle battery, and a feedback unit configured to provide information about a highest of voltage values required for the plurality of individual OLEDs, as a feedback to the DC-DC converter. The DC-DC converter adjusts the output voltage based on the feedback.