Unidirectional Cascading Interface for Expandable Display
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Solution Overview
Problem
Infinite expandable display systems based on electroluminescent displays have complex communication interfaces and high manufacturing costs due to the need for bidirectional communication schemes to compensate for pixel degradation.
Innovation Solution
The system employs a unidirectional interface circuit based on a cascading scheme, where driving command signals and execution result signals are transferred between display units using a set board and ASICs, simplifying the communication interface and reducing costs by using a unidirectional interface circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bidirectional communication scheme is used for pixel sensing, then pixel degradation compensation is achieved, but communication interface complexity increases
Solution Approach 1:
The patent extracts the sensing function from the bidirectional communication protocol and implements it through a unidirectional interface. The ASIC embedded in each display unit independently performs pixel sensing and generates execution result signals, which are then transmitted unidirectionally to adjacent display units and finally to the set board, eliminating the need for complex bidirectional communication while maintaining sensing capability
Solution Approach 2:
The patent introduces an intermediary cascading transmission mechanism where execution result signals are passed through adjacent display units in sequence before reaching the set board. This intermediary approach allows the system to maintain simplified unidirectional communication while still achieving comprehensive pixel sensing across all display units
2Reliability
If bidirectional communication scheme is used for pixel sensing, then pixel degradation compensation is achieved, but manufacturing cost increases
Solution Approach 1:
The patent removes the complex bidirectional communication infrastructure and replaces it with a unidirectional signal transmission system. Each display unit's ASIC independently handles sensing operations and transmits results unidirectionally, significantly reducing the communication interface complexity and associated manufacturing costs while preserving pixel degradation compensation functionality
Solution Approach 2:
The patent employs a simplified unidirectional interface circuit that is cheaper to manufacture than bidirectional communication interfaces. The ASIC in each display unit performs sensing operations locally and transmits results through a simple unidirectional path, reducing the need for expensive communication components and infrastructure
3Device complexity
If unidirectional interface circuit is used, then communication interface complexity is reduced, but signal transfer capability must be maintained
Solution Approach 1:
The patent segments the signal transfer process into multiple unidirectional stages. Execution result signals are first transmitted from the ASIC to adjacent display units, then sequentially passed through intermediate display units, and finally received by the set board. This segmented approach maintains complete signal transfer capability while using only simple unidirectional interfaces at each stage
Solution Approach 2:
The patent ensures continuous signal transmission through the cascading unidirectional interface. The execution result signal flows continuously from the ASIC through adjacent display units to the set board without interruption, maintaining full signal transfer capability despite the simplified unidirectional communication path
Data Source
AI summary
An infinitely expandable display apparatus and a driving method thereof are disclosed. An infinitely expandable display apparatus includes a cabinet including a plurality of display units each having an application specific integrated circuit (ASIC) embedded therein, a set board generating a driving command signal needed for driving of the cabinet, and a set interface circuit connecting the set board to the cabinet. The plurality of display units are connected to one another through a unidirectional interface circuit, and at least one of the plurality of display units transfers the driving command signal and an execution result signal based thereon to a neighbor display unit on the basis of a cascading scheme.