Display Pixel Bridge Layout to Block Data-Readout Coupling
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Solution Overview
Problem
Existing display devices face reliability issues due to coupling capacitance between data and readout lines, which can lead to signal interference and reduced performance.
Innovation Solution
The display device incorporates a vertical bridge line design with a first and second sub-electrode that are electrically disconnected, acting as a shielding member to prevent coupling capacitance, and includes a mesh structure reset voltage wire and power wires to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional vertical bridge line is used to connect data and readout lines, then signal transmission is enabled, but coupling capacitance occurs causing signal interference
Solution Approach 1:
The vertical bridge line is segmented into a first vertical bridge line and a second vertical bridge line separated by a horizontal bridge line. This segmentation prevents direct coupling between the data line and readout line by introducing an intermediate structure that breaks the capacitive coupling path while maintaining electrical connectivity through the horizontal bridge line.
Solution Approach 2:
The horizontal bridge line acts as an intermediary structure between the first vertical bridge line and the second vertical bridge line. It provides an alternative electrical path that prevents direct coupling capacitance between the data line and readout line while still allowing signal transmission, effectively mediating the interaction between the two lines.
2Object-affected harmful factors
If the vertical bridge line is separated into first and second sub-electrodes, then coupling capacitance is reduced, but device complexity increases
Solution Approach 1:
The vertical bridge line is divided into first and second sub-electrodes that are electrically disconnected from each other. This segmentation physically separates the electrodes to reduce coupling capacitance while the horizontal bridge line provides the necessary electrical connection, balancing complexity reduction with functional requirements.
Data Source
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AI summary
A display device (DD, 1060) includes: a first sub-pixel (SPX1), a second sub-pixel (SPX2), and a third sub-pixel (SPX3) arranged along a first direction (DR1), each of the first to third sub-pixels (SPX1 - SPX3) includes a pixel circuit (PXC); a light-sensing pixel (PSR) including a sensor circuit (SC); a data line (D) electrically connected to each of the second and third sub-pixels (SP2, SPX3); a readout line (RX) electrically connected to the light-sensing pixel (PSR); a horizontal bridge line (BRL1_H, BRL2_H) extending along the first direction (DR1); a first vertical bridge line (BRL1_V) extending in a second direction (DR2) and is located in the second sub-pixel (SPX2); and a second vertical bridge line (BRL2_V) extending in the second direction (DR2) and is located in the third sub-pixel (SPX3). In a plan view, the second vertical bridge line (BRL2_V) may be between the readout line (RX) and the data line (D) of the third sub-pixel (SPX3). The second vertical bridge line (BRL2_V) may include a first sub-electrode (SUE1) and a second sub-electrode (SUE2) that are spaced from each other.