OLED Driving Power Supply Voltage Adjustment for Color Pixels
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Solution Overview
Problem
In organic light emitting diode (OLED) displays, the large voltage across driving transistors leads to heating and high power consumption due to all pixel units being driven by the same voltage, which is not optimized for different colors, resulting in inefficient operation.
Innovation Solution
A driving power supply with a boost module and a voltage adjusting module that generates distinct driving voltages for different color pixel units, reducing the voltage across the driving transistor and optimizing power usage by using pulse control signals and linear voltage regulators to adjust voltages accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all pixel units are driven by the same driving voltage, then the circuit structure is simple, but the power consumption is high and heat generation occurs in driving transistors
Solution Approach 1:
The patent divides the driving voltage supply into separate channels for different color pixel units (red, green, blue). Each color has its own driving voltage output terminal (VDD_R, VDD_G, VDD_B) generated by dedicated voltage adjusting modules, allowing independent optimization of driving voltages for each color to reduce overall power consumption
Solution Approach 2:
The patent applies different driving voltages to different color pixel units based on their specific characteristics. The voltage adjusting modules generate optimized driving voltages tailored to each color's requirements, ensuring each pixel unit operates at optimal voltage levels rather than using a uniform voltage for all colors
2Reliability
If a large voltage is applied across driving transistors to ensure proper operation, then the driving reliability is improved, but heat generation increases
Solution Approach 1:
The patent optimizes the driving voltage parameters for each color pixel unit using voltage adjusting modules. By precisely controlling and adjusting the voltage parameters (VDD_R, VDD_G, VDD_B) to match each color's specific requirements, the system achieves reliable driving while minimizing excessive voltage application that would cause heat generation
3Device complexity
If the same driving voltage is used for all color pixel units, then the power supply structure is simple, but the operating efficiency is reduced
Solution Approach 1:
The power supply structure is segmented into multiple independent voltage adjusting modules, each dedicated to a specific color pixel unit. This segmentation enables each module to optimize voltage output for its assigned color, improving overall operating efficiency while maintaining a modular and manageable system architecture
Solution Approach 2:
The patent implements dynamic voltage adjustment for each color pixel unit through voltage adjusting modules. The driving voltages (VDD_R, VDD_G, VDD_B) can be independently optimized and adjusted based on the specific requirements of each color, enabling dynamic optimization of operating efficiency rather than using a static uniform voltage
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 reduces power consumption and heat generation in the driving transistors, improving the reliability and efficiency of the OLED display by providing tailored driving voltages for each color, thereby lowering overall power consumption.
Implementation Method 1
The boost module includes: a boost chip 2, an energy-storage inductor L, a first switching tube T1, a Schottky diode D... The boost module is used for boosting an initial voltage VCC input from the initial voltage input terminal to obtain the driving voltage VDD
Implementation Method 2
one terminal of the energy-storage inductor L is connected to the initial voltage input terminal, the other terminal of the energy-storage inductor L is connected to a first terminal of the Schottky diode D and a second electrode of the first switching tube T1
Implementation Method 3
The boost module includes: a boost chip 2, an energy-storage inductor L, a first switching tube T1, a Schottky diode D... the other terminal of the energy-storage inductor L is connected to a first terminal of the Schottky diode D
Data Source
AI summary
The present invention discloses a driving power supply, a display driving circuit and an organic light emitting diode display. The driving power supply comprises a boost module and a voltage adjusting module connected to the boost module; the boost module is used for boosting an initial voltage input from an initial voltage input terminal of the driving power supply to generate a reference voltage and outputting the reference voltage to the voltage adjusting module; the voltage adjusting module is used for adjusting magnitude of the reference voltage according to colors of pixel units to be driven to generate a plurality of driving voltages, respectively, and the driving voltages corresponding to pixel units of different colors are different.