In-Cell Self Capacitive Touch Display Panel Line Sharing
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Solution Overview
Problem
In-cell self capacitive touch control display panels face manufacturing difficulties and high driving costs due to the complexity of integrating touch control circuits with the array substrate.
Innovation Solution
The solution involves sharing touch scanning and receiving lines with the gate and data lines, respectively, and using pixel electrodes as touch control self capacitance, allowing for time-division display and touch control without additional process steps or driving components, utilizing materials like molybdenum, aluminum, copper, ITO, and Silicon Nitride layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate touch control circuit is integrated into the array substrate, then the in-cell self capacitive touch control function is achieved, but the manufacturing complexity and driving cost increase
Solution Approach 1:
The patent merges the touch control circuit components with the existing display circuit components. Specifically, the gate scan line serves dual purposes as both a display gate line and a touch scanning line. The data line serves as both a display data line and a touch receiving line. The pixel electrode serves as both a display electrode and a touch control self capacitance electrode. This merging eliminates the need for separate touch control circuits, thereby achieving touch control functionality without increasing manufacturing complexity
Solution Approach 2:
The patent implements multi-functionality in the array substrate components. The gate scan line performs both display scanning and touch scanning functions. The data line performs both display data transmission and touch signal receiving functions. The pixel electrode performs both display control and touch sensing functions as self capacitance. This universal design allows a single circuit structure to achieve both display and touch control functions, avoiding the need for additional separate circuits
2Adaptability or versatility
If a separate touch control circuit is integrated into the array substrate, then the in-cell self capacitive touch control function is achieved, but the driving cost increases
Solution Approach 1:
The patent combines the touch control driving requirements with the existing display driving circuitry. The gate driver that drives the display gate scan lines also drives the touch scanning lines. The source driver that drives display data lines also receives touch sensing signals through the same data lines. This combination reduces the quantity of separate driving components needed, thereby lowering driving cost
Solution Approach 2:
The driving circuits are designed to perform multiple functions. The gate driver provides both display gate signals and touch scanning signals. The source driver handles both display data transmission and touch signal reception. This multi-functional driving approach reduces the total number of driving components required, achieving touch control functionality without proportionally increasing driving cost
Data Source
AI summary
The present invention provides an in-cell self capacitive touch control display panel and a manufacture method thereof. The in-cell self capacitive touch control display panel comprises: an array substrate, a CF substrate and a liquid crystal layer arranged between the array substrate and the CF substrate, and light is incident from a CF substrate side, and exits out of an array substrate side. The array substrate comprises: a plurality of gate scan lines (11) separately arranged along a horizontal direction, a plurality of data lines (41) separately arranged along a vertical direction, and a plurality of pixel electrodes (50) aligned in array; a touch scanning line is commonly shared with the gate scan line (11), and a touch receiving line is commonly shared with the data line (41), and a touch control self capacitance is commonly shared with the pixel electrode (50), under the premise of not adding more to the present process flow of the array substrate, the in-cell self capacitive touch control function can be realized and the driving cost of the panel can be reduced. The manufacture method of the in-cell self capacitive touch control display panel can reduce the driving cost of the panel without adding more to the present process flow of the array substrate.