LED Controller System for High Refresh Rate Data Management
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Solution Overview
Problem
Existing LED pixel array systems face challenges in manufacturing, power management, and data handling at high refresh rates, particularly in controlling the intensity of thousands of emitting pixels at rates of 30-60 Hz, with limitations in power distribution and data management in hybrid silicon CMOS/GaN assemblies.
Innovation Solution
A LED controller system with a power distribution module, image frame buffer, logic module, and pulse width modulator, capable of refreshing images at 60 Hz or greater, connected to an external data bus, and including a standby image buffer for default image presentation, supports high data rates and large LED pixel arrays with hundreds to thousands of independently addressable pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual LED pixels are controlled at high refresh rates (30-60 Hz), then light intensity control precision is improved, but data management complexity and power distribution requirements worsen
Solution Approach 1:
The LED array is divided into multiple zones or groups that can be controlled independently. Instead of controlling every individual pixel at full resolution, the system segments the array into regions that share control characteristics, reducing the overall data management burden while maintaining sufficient control precision for each segment.
Solution Approach 2:
The system pre-calculates and pre-processes control data for LED zones before transmission. By performing preliminary actions such as zone-based intensity averaging or pre-computing control patterns, the system reduces real-time data processing requirements and simplifies ongoing data management.
2Measurement precision
If thousands of LED pixels are individually addressed, then spatial resolution is improved, but power distribution requirements and manufacturing complexity worsen
Solution Approach 1:
The manufacturing process is simplified by segmenting the LED array into modular zones that can be tested, calibrated, and assembled in smaller units. This modular approach reduces manufacturing complexity while preserving the ability to individually address pixels within each zone for high spatial resolution.
Solution Approach 2:
The patent introduces intermediary control structures or buffer zones that facilitate power distribution and signal routing. These intermediaries simplify the manufacturing of power traces and control lines by providing standardized interfaces between pixel groups, reducing overall system complexity.
3Measurement precision
If high refresh rates (60 Hz or greater) are implemented, then temporal control precision is improved, but power consumption and data transmission requirements worsen
Solution Approach 1:
The system implements periodic refresh cycles with variable intensity levels. By using periodic action with different duty cycles for different zones or time periods, the system maintains high temporal precision when needed while reducing average power consumption during steady-state conditions.
Solution Approach 2:
The system dynamically changes operational parameters such as refresh rate and intensity levels based on content requirements. By adjusting parameters like PWM duty cycle and refresh frequency adaptively, the system maintains temporal precision for dynamic content while consuming less power for static or slowly changing displays.
4Power
If thick power traces are used to extend through hybrid silicon CMOS/GaN assembly, then power distribution capability is improved, but device area and manufacturing complexity worsen
Solution Approach 1:
The power distribution network is segmented into multiple smaller power domains or regions within the hybrid assembly. Instead of requiring few thick traces spanning the entire device, the system uses numerous thinner power traces distributed throughout, reducing the area occupied by any single trace while collectively providing sufficient power distribution capability.
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 system enables fine-grained intensity, spatial, and temporal control of light distribution, reducing power fluctuations and data management issues, suitable for applications like architectural lighting, vehicle headlamps, and street lighting, with adaptive lighting capabilities and reduced energy consumption.
Implementation Method 1
LED pixel array able to provide intensity and spatially modulated light projection
Implementation Method 2
a pulse width modulator is connected between the image frame buffer and the LED pixel array
Data Source
AI summary
An LED controller system includes an LED controller including an image frame buffer able to receive image data. A sensor processing module is used to receive and process sensor data and a decision module is used to determine actions taken in response to processed sensor data. An image creation module is used to create images to be sent to the image frame buffer of the LED controller.