Touch Display Module Pressure Detection Signal Interference
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Solution Overview
Problem
The integration of touch and display panels in touch display modules leads to increased signal interference due to crowded components and wires, resulting in decreased accuracy for touch point detection and pressure value sensing.
Innovation Solution
A touch display module with a pressure detection mechanism that includes a 3-D sensor with touch units and pressure sensing units, where gate driving, touch scan, and pressure scan pulses are separated in time to minimize signal interference, and a mask layer is used to further reduce interference between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch and display panels are integrated in a touch display module, then the functionality and user experience are enhanced, but signal interference increases and detection accuracy decreases
Solution Approach 1:
The patent divides the integrated touch display module into distinct functional regions: display pixel units, touch sensing units, and pressure sensing units. Each unit type has dedicated signal transmission paths and control circuits, preventing signal interference while maintaining integration benefits. The segmentation of sensing units into touch-specific and pressure-specific components allows independent optimization of each function.
Solution Approach 2:
The patent introduces dedicated signal transmission lines and control circuits as intermediaries between the sensing units and processing circuits. These intermediaries isolate and manage signals from different sensing types, preventing cross-interference. The use of separate transmission paths for touch signals and pressure signals acts as a mediator to maintain signal integrity in the integrated structure.
2Adaptability or versatility
If pressure sensing units are added to enhance touch functionality, then user experience is improved, but signal interference and detection accuracy problems worsen
Solution Approach 1:
The patent segments the sensing functionality into distinct touch sensing units and pressure sensing units, each with dedicated signal transmission paths. This segmentation prevents signal interference between touch detection and pressure detection, allowing both functions to operate simultaneously without mutual interference.
Solution Approach 2:
The integrated touch display module achieves multi-functionality by combining display, touch sensing, and pressure sensing in a single structure. The module can simultaneously perform visual display, touch point detection, and pressure value detection, providing enhanced user experience while managing signal interference through proper design.
3Measurement precision
If more sensing units are integrated into the touch panel, then detection capabilities are enhanced, but component crowding and signal interference increase
Solution Approach 1:
The patent arranges touch sensing units and pressure sensing units in different spatial dimensions and layers within the integrated module. This dimensional separation reduces physical crowding of components while maintaining comprehensive detection coverage. The multi-layer structure allows more sensing units to be integrated without increasing planar density excessively.
Solution Approach 2:
The patent divides the sensing system into separate touch sensing units and pressure sensing units, each with dedicated control circuits and signal transmission paths. This segmentation reduces the complexity of signal management compared to a unified sensing system, making the integration of multiple sensing units more manageable despite the increased component count.
Data Source
AI summary
A touch display module having a pressure detection mechanism is provided. The touch display module includes a 3-D (three-dimensional) sensor and a 3-D controller. The 3-D sensor includes touch units and at least one pressure sensing unit. The 3-D controller includes a driver and a driving pulse processor. The driver provides a pressure scan pulse to the pressure sensing unit and a touch scan pulse to the touch units in combination with the driving pulse processor. The present disclosure further provides a driving method corresponding to the touch display module having the pressure detection mechanism including steps of: providing pressure scan pulses to the pressure sensing unit by the driver in combination with the driving pulse processor and providing touch scan pulses to the touch units in combination of the driving pulse processor by the driver.