Pixel Data Line Layout for Threshold Compensation in Displays
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Solution Overview
Problem
Display apparatuses face challenges in ensuring sufficient time for compensating for threshold voltage and storing data signals, particularly in high-resolution displays where spatial limitations restrict the arrangement of data lines and driving voltage lines.
Innovation Solution
A display apparatus is designed with two data lines arranged in one pixel, where the driving voltage line overlaps the data lines and is separated by insulating layers, allowing for sufficient time to compensate for threshold voltage and store data signals, while reducing parasitic capacitance and cross-talk between the lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If two data lines are arranged in one pixel with driving voltage line overlapping, then sufficient time for threshold voltage compensation and data storage is achieved, but parasitic capacitance and cross-talk between lines increases
Solution Approach 1:
An insulating layer is introduced as an intermediary between the driving voltage line and the data lines. This insulating layer acts as a mediator that allows the driving voltage line to overlap with the data lines for compact layout while preventing direct electrical interaction, thereby reducing parasitic capacitance and cross-talk between the lines.
2Measurement precision
If high-resolution display is implemented, then image quality is improved, but spatial limitations restrict the arrangement of data lines and driving voltage lines
Solution Approach 1:
The patent transitions from a planar arrangement to a three-dimensional arrangement by allowing the driving voltage line to overlap with data lines in the vertical dimension. This dimensional change enables more efficient use of horizontal space, accommodating high-resolution requirements without proportionally increasing the display area.
Solution Approach 2:
The insulating layer serves multiple functions simultaneously: it provides electrical insulation between the driving voltage line and data lines, enables compact overlapping arrangement for high resolution, and maintains sufficient spacing for threshold voltage compensation and data storage operations.
Data Source
AI summary
A display apparatus includes a first transistor, a first data line, a second data line, a driving voltage line, and a first insulating layer. The first transistor includes a first semiconductor layer and a first gate electrode. The first semiconductor layer includes a source region and a drain region. The first data line is disposed at a left side of the first transistor, and the second data line is disposed at a right side of the first transistor. The driving voltage line at least partially overlaps the first data line and the second data line. The first insulating layer is disposed between the first data line and the driving voltage line and between the second data line and the driving voltage line.