Signal Conversion Unit for Touch Display IC Interface Reduction
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Solution Overview
Problem
Mutual capacitance type touch control display panels face challenges due to the limited number of signal interfaces on the driving IC chip, leading to increased costs and potential bonding faults when connecting touch sensing signal lines, which affects the accuracy and reliability of touch control functions.
Innovation Solution
A touch control display panel design that incorporates a signal conversion unit with a plurality of input terminals connected to touch sensing signal lines and output terminals connected to the driving IC chip, allowing the conversion of multiple input signals into fewer output signals, reducing the number of interfaces needed and minimizing bonding issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple touch sensing signal lines are connected to the driving IC chip through a limited number of signal interfaces, then the touch control functionality is achieved, but the cost increases and bonding faults occur
Solution Approach 1:
The patent segments the signal transmission path by introducing a signal conversion unit that divides multiple touch sensing signal lines into multiple groups, with each group connected to a separate output terminal of the signal conversion unit. This segmentation reduces the number of direct connections required to the driving IC chip, thereby reducing bonding complexity and improving bonding reliability.
Solution Approach 2:
The signal conversion unit acts as an intermediary between the multiple touch sensing signal lines and the limited signal interfaces of the driving IC chip. It converts multiple input signals from touch sensing electrodes into a reduced number of output signals that can be processed by the driving IC chip, eliminating the need for direct one-to-one connections and reducing bonding faults.
2Adaptability or versatility
If a touch control IC chip is added to process touch sensing signals, then signal processing capability is improved, but the cost of the touch control display panel increases
Solution Approach 1:
The patent merges the signal conversion function into the array substrate, combining the functions of touch sensing signal acquisition and signal conversion into a single integrated structure. This eliminates the need for a separate touch control IC chip, reducing component quantity and cost while maintaining signal processing capability.
Solution Approach 2:
The array substrate is designed to perform multiple functions: it serves as both the display driving substrate and the signal conversion unit. The signal conversion unit integrated on the array substrate can process touch sensing signals from multiple electrodes and output converted signals to the driving IC chip, making the array substrate multi-functional and eliminating the need for additional dedicated touch control IC chips.
3Device complexity
If multiple touch sensing signal lines are directly connected to the driving IC chip, then signal transmission is simplified, but the number of required signal interfaces increases
Solution Approach 1:
The patent introduces a temporal dimension to signal transmission by sequentially outputting touch sensing signals from the signal conversion unit. Instead of requiring simultaneous multiple interfaces, the system uses time-division multiplexing where different touch sensing signals are transmitted at different time periods through the same output terminal, reducing the number of required signal interfaces while maintaining signal transmission capability.
Data Source
AI summary
A touch control display panel, a touch control display device and a driving method are provided. The touch control display panel comprises a color film substrate including touch sensing electrodes and touch sensing signal lines electrically connected to the touch sensing electrodes, respectively; and an array substrate arranged opposite to the color film substrate and including a driving IC chip and a signal conversion unit. The signal conversion unit includes input terminals and output terminals. The input terminals are electrically connected to the touch sensing signal lines, respectively. The output terminals are electrically connected to the driving IC chip. The signal conversion unit combines a plurality of input signals received at the input terminals into a plurality of output signals, and transmits the output signals to the output terminals, respectively.