AMOLED Touch System Layer Integration
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Solution Overview
Problem
The existing touch control systems for AMOLED displays are thick and heavy due to the multiple layers required, including a glass cover and independent sensors, which increases the weight of terminal products.
Innovation Solution
The touch control system integrates the TX and RX circuits onto the TFT backplane or packaging glass, reducing the number of stacked layers and incorporating a display driving method that uses segment-by-segment scan and display to shorten response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an independent sensor layer is used in the touch control system, then the touch control function is achieved, but the display screen becomes thicker and heavier
Solution Approach 1:
The patent merges the touch control system with the display screen structure by integrating the TX circuit into the TFT backplane and the RX circuit into the packaging glass, eliminating the need for an independent sensor layer. This combination achieves touch control functionality while reducing the overall thickness and weight of the display screen.
Solution Approach 2:
The TFT backplane and packaging glass are designed to serve multiple functions: the TFT backplane serves as both the display driving substrate and the TX circuit substrate, while the packaging glass serves as both the protective cover and the RX circuit substrate. This multi-functionality eliminates the need for separate dedicated sensor layers.
2Reliability
If multiple layers are stacked to achieve touch control, then the touch control system is complete, but the display screen thickness increases
Solution Approach 1:
The patent combines multiple functions into fewer layers by integrating the TX circuit into the TFT backplane and the RX circuit into the packaging glass, reducing the number of stacked layers while maintaining complete touch control functionality.
Solution Approach 2:
The patent redistributes circuit functions across different existing layers (TFT backplane and packaging glass) rather than adding new stacked layers, utilizing the dimensional space already available in the display structure.
3Reliability
If an independent sensor is used, then the touch control system is functional, but the terminal product weight increases
Solution Approach 1:
The patent merges the touch control system with the display screen structure, eliminating the need for separate sensor components that would add weight to the terminal product. The TX and RX circuits are integrated into existing structural elements.
Solution Approach 2:
The patent extracts the touch control functionality from the traditional multi-layer sensor structure and integrates it directly into the display screen's existing layers, removing unnecessary weight while preserving functionality.
Data Source
AI summary
A touch system includes a glass cover, a polarizer, packaging glass, a thin film transistor (TFT) backplane, a transmitter (TX) circuit, and a receiver (RX) circuit, where the glass cover, the polarizer, the packaging glass, and the TFT backplane are fitted in sequence from top to bottom, and the TX circuit is located on the TFT backplane, and the RX circuit is located on the packaging glass. The TX circuit and the RX circuit are respectively disposed on the TFT backplane and the packaging glass. Therefore, a quantity of stacked layers of the touch control system is reduced. This reduces a thickness of the touch system, thereby achieving a thinner and lighter active matrix organic light emitting diode (AMOLED) display screen, and reducing a weight of a terminal product.