PIS LED Display Board Current Control for Power Loss Reduction
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Solution Overview
Problem
Conventional LED electronic display boards face high power consumption and reduced lifespan due to fixed resistance values, leading to unnecessary power loss and heat generation, requiring complex power monitoring and additional devices for efficient operation.
Innovation Solution
A Pixel Integrate Scanning (PIS) distributed type automatic power-saving electronic display board that uses a PIS power-saving controller to histogram-equalize image signals, comparing current values with gamma controller reference values to adjust driving currents, minimizing power consumption and reducing flickering through a gain controller and auto flicker detector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed resistance values are used in LED electronic display boards, then the circuit structure is simple, but power consumption increases and heat generation occurs
Solution Approach 1:
The patent applies dynamic resistance adjustment by replacing fixed resistors with PWM-controlled switches that dynamically adjust the effective resistance based on image content. The controller modifies driving currents in real-time according to histogram analysis of displayed images, transforming a static circuit into a dynamic system that adapts to varying display requirements, thereby reducing power consumption while maintaining display quality
Solution Approach 2:
The patent changes the electrical parameters (current, resistance) of the LED driving circuit based on image characteristics. By analyzing the histogram of displayed images and adjusting driving currents accordingly, the system optimizes power consumption for different image types (e.g., dark images use lower currents), directly addressing the energy loss problem caused by fixed resistance values
2Device complexity
If fixed driving currents are supplied to LEDs, then the control system is simple, but power loss increases and LED lifespan decreases
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors image content through histogram analysis and adjusts driving currents accordingly. This closed-loop control ensures LEDs operate at optimal current levels for each displayed image, preventing excessive current that would reduce lifespan while maintaining simple overall system architecture through automated feedback-based adjustment
Solution Approach 2:
The patent performs preliminary analysis of the image content (histogram calculation) before adjusting the driving currents. By pre-processing the image data to determine optimal current levels based on brightness distribution, the system prepares the appropriate driving parameters in advance, preventing power loss and heat generation before they occur while keeping the control logic straightforward
3Loss of energy
If power monitoring devices and video analytics programs are added, then power consumption can be reduced, but device complexity increases
Solution Approach 1:
The patent merges the power-saving function directly into the existing LED control circuitry. The histogram analysis and current adjustment capabilities are integrated into the current control system, eliminating the need for separate power monitoring devices and video analytics programs. This consolidation achieves power reduction while maintaining simple system architecture by combining multiple functions into a unified control mechanism
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 effectively reduces power loss and extends the lifespan of LED modules by dynamically controlling driving currents based on image quality, brightness, and size, while minimizing the need for additional devices and complex systems.
Implementation Method 1
A light-emitting diode (LED) refers to a semiconductor device that emits light
Data Source
AI summary
Provided is a pixel integrate scanning (PIS) distributed type automatic power-saving electronic display board, which histogram-equalizes a reference value of color values of an initial image signal on the basis of image pulses along with the drive control for easily implementing a high-definition image to set the value of a current (If) supplied to and flowing through the LED, and allows the gain controller to compare the set current value with a difference between the image reference value of the gamma controller and the correction value of the histogram-equalized image and determine a change in a subtraction loss value based on the power consumption difference of a display image in consideration of image quality change, brightness, and image size to designate a current value for display on the electronic display board and transmit corresponding image information so that the power-saving operation of the LED module is automatically performed.