Display Data-Line Wire Mixing for Demux Coupling Control
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Solution Overview
Problem
Display quality is reduced due to coupling between data lines in display apparatuses, leading to data mapping errors and increased dead space, particularly in border reduction structures and when demux circuits are adjacent to integrated circuits.
Innovation Solution
A display apparatus with a wire mixing structure that includes a demux circuit connected to four output amplifiers, branching into eight output lines, and a wire mixing structure that rearranges data order to prevent data mapping errors and enhance demux coupling, while maintaining the integrated circuit and active area of the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a demux circuit is used to divide R-G data and B-G data into separate data lines, then data routing flexibility is improved, but coupling between data lines increases causing display quality degradation
Solution Approach 1:
The patent introduces a wire mixing structure as an intermediary component between the demux circuit and the display panel. This wire mixing structure includes a first wire group and a second wire group that are twisted or intertwined with each other, acting as a mediator to reduce electromagnetic coupling between data lines while maintaining the signal routing flexibility provided by the demux circuit.
Solution Approach 2:
The patent applies different wire configurations to different regions: the wire mixing structure with twisted first and second wire groups is used specifically in regions where coupling is problematic, while other regions maintain standard routing. This local application of specialized wire mixing addresses the coupling issue without compromising overall system performance or requiring complete redesign.
2Area of stationary object
If border reduction structure is implemented to reduce dead space, then display area is improved, but additional lines are added causing increased coupling
Solution Approach 1:
The wire mixing structure serves as an intermediary that reduces coupling between the additional border reduction lines and the main data lines. By twisting the wire groups, the structure minimizes electromagnetic interference while allowing the border reduction structure to achieve its goal of reducing dead space and increasing display area.
3Area of stationary object
If demux circuit is disposed adjacent to integrated circuit to reduce dead space, then dead space is reduced, but number of floating wires increases causing increased coupling
Solution Approach 1:
The wire mixing structure with twisted first and second wire groups acts as an intermediary that reduces coupling between the increased number of floating wires resulting from the compact demux circuit placement. This allows the demux circuit to be disposed adjacent to the integrated circuit, minimizing dead space while the wire mixing mitigates the coupling effect of the additional wires.
4Device complexity
If conventional data driver output is connected directly to data line, then connection simplicity is improved, but data mapping error occurs due to demux circuit position shift
Solution Approach 1:
The wire mixing structure performs a preliminary reconfiguration of the data line connections before the data reaches the display panel. By pre-arranging the wire mapping to compensate for the demux circuit position shift, the system maintains data mapping accuracy without requiring complex real-time correction or increasing connection complexity.
Data Source
AI summary
A display apparatus includes a data driver, a demux circuit, a wire mixing structure and a display panel. The data driver includes four output amplifiers. The demux circuit is connected to the four output amplifiers and branches the four output amplifiers into first, second, third, fourth, fifth, sixth, seventh, and eighth output lines through demux switching. The wire mixing structure is connected to the demux circuit, and has an input terminal and an output terminal. The display panel includes data lines connected to the wire mixing structure. When first data is provided to the input terminal of the wire mixing structure in an order of 1, 2, 3, 4, 5, 6, 7 and 8, second data at the output terminal of the wire mixing structure is output in an order of 4, 1, 2, 3, 7, 6, 5 and 8.