Touch Display Panel Data Line Switching for Signal Integration
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Solution Overview
Problem
The integration of touch and display functions in a single panel for thinner and lighter displays leads to complex manufacturing processes and increased costs due to additional metal wiring and uneven surfaces, which affect display quality and increase the risk of light leakage.
Innovation Solution
A touch display panel configuration where touch sensing electrodes are connected to data lines via control switches, allowing the same data lines to provide touch signals during touch states and display signals during display states, eliminating the need for additional metal wiring and improving surface planarization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional metal wiring is added to connect touch sensing electrodes, then electrical connection is achieved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent merges the touch sensing electrode connection with the existing data line structure. The touch sensing electrode is electrically connected to the data line through a via hole, eliminating the need for separate metal wiring layers. This integration reduces manufacturing complexity while maintaining reliable electrical connection for touch sensing functionality.
Solution Approach 2:
The data line serves dual functions: it transmits display data signals to sub-pixels during display mode and provides touch driving signals to touch sensing electrodes during touch sensing mode. This multi-functionality eliminates the need for dedicated metal wiring for touch electrodes, simplifying the overall structure and reducing manufacturing steps.
2Reliability
If additional metal wiring is added to connect touch sensing electrodes, then electrical connection is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines the touch electrode connection function with the existing data line infrastructure. By using via holes to connect touch sensing electrodes directly to data lines, the invention eliminates the need for additional metal wiring layers and their associated manufacturing processes, thereby significantly reducing manufacturing cost while ensuring reliable electrical connection.
Solution Approach 2:
The existing data line structure serves the dual purpose of data transmission and touch sensing connection. The via holes and data lines that already exist in the display panel structure are utilized to provide electrical connection for touch electrodes, making the system self-sufficient and eliminating the need for external metal wiring additions.
3Reliability
If additional metal wiring is added to connect touch sensing electrodes, then electrical connection is achieved, but surface planarization deteriorates causing light leakage
Solution Approach 1:
The patent integrates touch electrode connections into the existing data line plane. By connecting touch sensing electrodes to data lines through via holes within the same planar structure, the invention maintains surface flatness without introducing additional metal wiring that would create height variations and potential light leakage issues.
4Length of moving object
If touch sensing electrodes are integrated into the display panel, then panel thickness is reduced, but manufacturing process complexity increases
Solution Approach 1:
The patent merges touch sensing functionality into the existing display panel data line structure. By utilizing the data lines and via holes that are already part of the display panel fabrication process, the invention integrates touch sensing without requiring separate metal wiring layers, thereby reducing panel thickness while keeping manufacturing process complexity manageable.
Data Source
AI summary
A touch display panel and a method for driving the touch display panel. The touch display panel including: a substrate; first scan lines and data lines; sub-pixels arranged in an array; touch sensing electrodes disposed in an array, each of which corresponds to the sub-pixels; first control switches, wherein each of the touch sensing electrodes is connected to at least one of the data lines via one of the first control switches. When in a touch state, the first control switch is turned on, so that the at least one of the data lines is configured to provide a touch signal to the touch sensing electrode corresponding to the data lines; and when in a display state, the first control switch is turned off, so that each of the data lines is configured to provide a display signal to the sub-pixel corresponding to the data line.