Array Substrate Touch Control Wiring Simplification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing self-capacitive touch-control display devices have complex wiring and a large occupied area, hindering the development of thinner and lighter display devices.
Innovation Solution
An array substrate with intersecting gate and data lines, independent touch-control electrodes, and a touch-control circuit that includes switch units, control leads, and a control unit, allowing row-by-row control of touch detection and minimizing the area occupied by the touch-control structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing self-capacitive touch-control structures are used, then touch control function is achieved, but wiring becomes complicated and occupied area increases
Solution Approach 1:
The touch-control electrode is divided into multiple segments (first touch-control electrode and second touch-control electrode) that are independently controllable. Each segment can be selectively activated through separate switch units, allowing the touch-control function to be achieved with simpler wiring structures compared to a single large electrode requiring complex multi-layer routing.
Solution Approach 2:
The patent introduces a temporal dimension to touch control by sequentially activating different touch-control electrodes in different time periods. The control unit activates either the first or second touch-control electrode based on the scanning phase, transforming the simultaneous wiring complexity into a sequential control approach that reduces structural complexity.
2Ease of operation
If existing self-capacitive touch-control structures are used, then touch control function is achieved, but occupied area becomes large
Solution Approach 1:
The touch-control electrode is segmented into multiple smaller electrodes (first and second touch-control electrodes) arranged in different regions. This segmentation allows each electrode to occupy a smaller area while collectively providing the necessary touch control functionality across the display panel, reducing the overall occupied area compared to a single large electrode structure.
Solution Approach 2:
The patent utilizes temporal multiplexing to reduce spatial requirements. By sequentially activating different touch-control electrodes in different time periods, the system achieves comprehensive touch control coverage without requiring all electrodes to be simultaneously present in the same spatial location, thereby reducing the occupied area.
3Area of stationary object
If simplified touch-control structure is implemented, then area is reduced, but touch detection control becomes more difficult
Solution Approach 1:
The control unit incorporates feedback mechanisms to track which touch-control electrode is currently active and manages the switching between first and second touch-control electrodes based on scanning phase information. This feedback control simplifies the overall system by providing clear state management and automatic coordination of the simplified electrode structure.
Solution Approach 2:
The control unit is pre-programmed with the scanning phase information and automatically determines which touch-control electrode should be activated next. This preliminary planning of the control sequence reduces real-time control complexity and enables smooth transitions between different electrode states without requiring complex on-the-fly decision-making.
Data Source
AI summary
An array substrate includes a plurality of pixel units defined by intersected gate electrode lines and data lines, a plurality of independent touch-control electrodes arranged in an array, and a touch-control circuit. The touch-control circuit includes a plurality of first switch units, a plurality of first control leads, a plurality of touch-detection terminals, and a control unit. The touch-control electrode is electrically connected to one touch-control terminal through at least one of the first switch units. The first switch unit is electrically connected to the control unit through at least one of the first control leads. The first control lead is configured between any of neighboring rows of the pixel units. Further, when the array substrate is in a touch detection phase, the control unit is capable of controlling an ON status of the first switch units to allow row-by-row control of touch detection for the plurality of touch-control electrodes.