Modular Display Scan Group Control With Daisy-Chained Drivers
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Solution Overview
Problem
Large-scale display systems with high-resolution display modules require numerous driver ICs and pins, leading to increased material and power consumption, necessitating a method to control multiple scan groups without a high-performance controller.
Innovation Solution
A modular display apparatus comprising a plurality of display modules with scan groups connected in a daisy chain method, utilizing a controller to transmit image signals and scan signals using a progressive scan method, reducing the need for high-performance controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a passive matrix method is used to drive pixels in a large-scale display, then the display can be controlled with simpler driver ICs, but the number of driver ICs and pins required increases significantly
Solution Approach 1:
The display is divided into multiple scan groups, where each scan group is driven by a separate driver IC. This segmentation allows the system to manage large-scale displays with simpler controllers, as each driver IC handles only a portion of the scan lines rather than all scan lines simultaneously.
Solution Approach 2:
The patent introduces a time dimension by sequentially activating different scan groups across multiple frames. Instead of driving all scan lines simultaneously in one frame, the system divides scanning across multiple frames, reducing the number of pins required at the controller at any given moment.
2Measurement precision
If the number of scan groups increases to achieve high resolution, then display quality improves, but the number of pins required at the controller increases
Solution Approach 1:
Scan groups are segmented and assigned to different frames sequentially. The controller transmits PWM signals for different scan groups in different frames rather than simultaneously, reducing the pin count requirement while maintaining high resolution through increased temporal multiplexing.
Solution Approach 2:
The system uses periodic scanning where different scan groups are activated in alternating frames. This periodic action allows the same physical pins to be reused across different time periods, enabling high resolution without proportionally increasing the number of pins.
3Adaptability or versatility
If a high-performance controller is used to manage multiple scan groups, then control capability improves, but material cost and power consumption increase
Solution Approach 1:
The control task is segmented across multiple frames, with each frame handling a subset of scan groups. This allows the use of lower-performance, lower-power controllers that can manage fewer active scan groups at any given moment, while still achieving comprehensive control of the entire display over time.
Solution Approach 2:
The system dynamically adjusts which scan groups are active in each frame, allowing the controller to operate at lower performance levels during individual frames while maintaining overall control capability across the complete scanning cycle.
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 approach reduces material and power consumption by minimizing the number of required pins and driver ICs, enabling efficient control of large-scale display systems with lower-cost and lower-performance components.
Implementation Method 1
light emitting diodes (LEDs) generated at a cross area of the scan lines and the data lines
Data Source
AI summary
A modular display apparatus is disclosed. The modular display apparatus includes a plurality of display modules, and a controller configured to control the plurality of display modules, and the plurality of display modules include a plurality of scan groups, respectively, the controller is configured to transmit an image signal corresponding to the respective display modules based on an image frame, and the respective scan groups included in a first display module from among the plurality of display modules includes a plurality of scan lines arranged in one direction, a plurality of data lines arranged in a direction perpendicular to the plurality of scan lines, light emitting diodes generated at a cross area of the scan lines and the data lines, and at least one driver integrated circuit.