Infinitely Expandable Display Apparatus Output Deviation Compensation
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Solution Overview
Problem
In infinitely expandable display apparatuses, the sequential reception of image data by multiple display units leads to progressive delays, resulting in image output deviations and degraded quality as the number of units increases.
Innovation Solution
An output deviation compensation circuit is introduced to generate and transfer a deviation compensation signal, ensuring simultaneous image data output across all display units, synchronizing their output times through a cascading scheme.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display units are connected in a cascading scheme to enable infinitely expandable display, then the display area can be increased, but the image output time deviates between display units due to sequential image data reception
Solution Approach 1:
The patent applies preliminary action by calculating and setting compensation values in advance for each display unit based on its position in the cascade. The compensation value is predetermined according to the formula: compensation value = (position in cascade - 1) × compensation period. This allows each display unit to pre-adjust its image holding time to compensate for the sequential reception delay, ensuring synchronized output across all units without requiring real-time adjustment mechanisms.
2Device complexity
If image data is sequentially received by display units in a cascading scheme, then device complexity is reduced, but image quality degrades due to output time deviation
Solution Approach 1:
The patent applies local quality by assigning different compensation values to different display units based on their specific positions in the cascade. Each display unit receives a unique compensation value tailored to its location: the first unit gets 0 compensation, the second gets 1 compensation period, the third gets 2 compensation periods, and so on. This localized adjustment ensures that each unit compensates precisely for its specific delay, achieving synchronized output while maintaining the simple cascading structure.
3Area of stationary object
If the number of display units increases to satisfy large-size display demands, then display area increases, but image quality degrades due to increased output deviation
Solution Approach 1:
The patent enables scalable synchronization by establishing a systematic compensation method that works for any number of display units. The compensation value is calculated in advance based on the unit's position: compensation value = (position - 1) × compensation period. This preliminary calculation approach allows the system to maintain image quality regardless of how many units are connected, as each unit's compensation is predetermined and does not depend on the total number of units in the cascade.
Data Source
AI summary
An infinitely expandable display apparatus includes a set board outputting image data, a plurality of display devices connected to one another through an interface circuit based on a cascading scheme to sequentially receive the image data, and an output deviation compensation circuit generating a deviation compensation signal for allowing the image data to be simultaneously output from the plurality of display devices, and transferring the deviation compensation signal to the plurality of display devices.