Power Source Voltage Application Circuit for Miniature LED Displays
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Solution Overview
Problem
Miniature LEDs face challenges in being adapted to medium-or-large-size display products due to high power consumption and inefficiency in luminous efficiency compared to OLEDs, with a significant portion of voltage being wasted in wiring, making them unsuitable for low-power applications.
Innovation Solution
A power source voltage application circuit comprising an energy storage sub-circuitry, resetting sub-circuitry, and output control sub-circuitry is introduced, which includes transistors and capacitors to manage voltage connections and disconnects, reducing energy loss by isolating the light-emitting element from the high voltage input and allowing efficient power distribution to pixel circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If miniature LED is applied to display panel with direct power supply, then simple manufacture process and long service life are achieved, but power consumption for wiring becomes far greater than power consumption for light emission
Solution Approach 1:
The patent divides the display panel into multiple independent power supply units, each serving a specific region. By segmenting the power supply system, the wiring length for each unit is reduced, thereby decreasing the power consumption for wiring while maintaining the simplicity of the manufacture process.
Solution Approach 2:
The patent introduces a voltage selection circuit that operates in the electrical dimension to optimize power delivery. By dynamically selecting between different voltage inputs based on regional requirements, the system reduces unnecessary voltage drops across wiring without complicating the manufacturing process.
2Illumination intensity
If higher current is provided to miniature LED to achieve same brightness as OLED, then luminous efficiency requirement is met, but power consumption increases significantly
Solution Approach 1:
The patent implements regional power supply with different voltage levels tailored to specific display areas. By providing higher voltage only where high brightness is required and lower voltage in other regions, the system achieves the necessary illumination intensity while significantly reducing overall power consumption.
Solution Approach 2:
The voltage selection circuit dynamically adjusts the power supply voltage based on real-time display requirements. This dynamic adaptation allows the system to optimize the balance between brightness output and power consumption, providing higher current only when and where needed.
3Illumination intensity
If voltage is applied directly across cathode and anode of miniature LED, then light emission function is achieved, but majority part of voltage is wasted along wires
Solution Approach 1:
The patent introduces a voltage selection circuit as an intermediary between the power source and the LED array. This intermediary component optimizes voltage distribution by selecting appropriate voltage levels for different regions, thereby reducing voltage wastage in wiring while ensuring sufficient voltage reaches the LED terminals for effective light emission.
Data Source
AI summary
The present disclosure provides a power source voltage application circuit, including a power source voltage output end, an energy storage sub-circuitry, a resetting sub-circuitry and an output control sub-circuitry. A first end of the energy storage sub-circuitry is connected to a first node, and a second end of the energy storage sub-circuitry is connected to a second node. The resetting sub-circuitry is connected to a resetting control end, a reference voltage input tend, the first node, the second node and an initial voltage input end respectively. The output control sub-circuitry is connected to an output control end, a first voltage input end, the first node, the second node and the power source voltage output end respectively.