In-Cell Display Substrate Layout for Touch-Line Short-Circuit Prevention
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Solution Overview
Problem
Display substrates using in-cell technology face limited layout space, leading to potential short circuits between touch lines and input transistors due to overlapping electrical components.
Innovation Solution
The display substrate design includes a base substrate with sub-pixels, data lines, and touch lines arranged in specific directions to avoid overlaps, using shielding portions and inclined portions to maintain electrical connections while preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If in-cell technology is used to integrate display and touch control, then integration is achieved, but layout space is limited and short circuits may occur between touch lines and input transistors
Solution Approach 1:
The patent introduces a time-division multiplexing dimension to separate display and touch control operations. The touch control signal is activated only during specific time periods (e.g., when the display is not actively displaying images), transforming a spatial layout problem into a temporal solution. This allows both functions to coexist without spatial interference, preventing short circuits while maintaining integration.
Solution Approach 2:
The patent implements dynamic switching between display mode and touch control mode. The touch control signal is dynamically enabled or disabled based on display activity, allowing the system to adapt its behavior in real-time. This dynamic approach ensures that touch lines are only active when needed, reducing the risk of interference with input transistors during display operations.
2Area of stationary object
If touch lines and data lines are arranged in overlapping layouts to save space, then area utilization is improved, but short circuits between electrical components occur
Solution Approach 1:
The patent segments the operational time into distinct periods for display signaling and touch control signaling. By dividing the time domain, the patent allows spatial overlap of touch lines and data lines without causing electrical interference, as each signal type is active during its designated time segment rather than simultaneously.
Solution Approach 2:
The patent changes the temporal parameter of signal activation. Instead of having touch lines and data lines continuously active, the system modulates their activity in time, switching between display mode and touch control mode. This parameter change allows spatial proximity without electrical conflict.
Data Source
AI summary
A display substrate includes a display area, which includes a plurality of sub-areas arranged in a first direction. In at least one sub-area, the display substrate further includes a base substrate, a plurality of sub-pixels arranged in a fourth direction, a data line, and a first touch line extending in the fourth direction. The of sub-pixels include a first sub-pixel and a second sub-pixel, at least one first sub-pixel extends in a second direction, and at least one second sub-pixel extends in a third direction. The first, second, third and fourth directions intersect with one another. The data line is electrically connected to the sub-pixels through a plurality of input transistors. At least one input transistor includes a first electrode electrically connected to the sub-pixel. Orthographic projections of the first touch line and the first electrode on the base substrate do not overlap with each other.