AMOLED Pixel Circuit In-Cell Touch Integration
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Solution Overview
Problem
Existing AMOLED display panels face challenges in integrating in-cell touch control circuits with AMOLED driving circuits due to limited space, requiring additional Thin Film Transistors (TFTs) that occupy valuable space in the pixel unit.
Innovation Solution
The integration of an AMOLED pixel circuit comprising a light-emitting module, touch control module, control module, output module, and driving and amplifying module, where the control module and driving and amplifying module are shared between the light-emitting and touch control modules, allowing for time division driving without increasing the number of signals, enabling simultaneous manufacturing of in-cell touch screen panel circuits and AMOLED driving circuits in limited pixel unit space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional TFTs are added to the pixel unit for touch control circuit, then the touch control function is achieved, but the pixel unit space is occupied and manufacturing complexity increases
Solution Approach 1:
The patent applies multi-functionality by enabling the same pixel circuit to perform both display and touch control functions. The pixel circuit includes a light emitting module for display and a touch sensing module that shares the same pixel electrode structure. By using the pixel electrode as both the light emitting electrode and the touch sensing electrode, the circuit achieves dual functionality without requiring separate dedicated touch control TFTs, thus reducing overall device complexity while maintaining both display and touch capabilities
Solution Approach 2:
The patent merges the display circuit and touch control circuit into a single integrated pixel unit. The touch sensing module is combined with the light emitting module such that they share common structures including the pixel electrode, insulation layers, and signal lines. This merging eliminates the need for separate touch control TFTs and reduces the number of manufacturing steps, allowing simultaneous manufacturing of both display and touch control circuits in the limited pixel unit space
2Adaptability or versatility
If additional TFTs are added to the pixel unit for touch control circuit, then the touch control function is achieved, but the pixel unit space is occupied
Solution Approach 1:
The patent applies multi-functionality by enabling the same pixel circuit to perform both display and touch control functions. The pixel circuit includes a light emitting module for display and a touch sensing module that shares the same pixel electrode structure. By using the pixel electrode as both the light emitting electrode and the touch sensing electrode, the circuit achieves dual functionality without requiring separate dedicated touch control TFTs, thus reducing overall device complexity while maintaining both display and touch capabilities
Solution Approach 2:
The patent implements nesting by placing the touch sensing module within the same pixel unit structure as the light emitting module. The touch sensing module is nested within the pixel electrode structure, utilizing the space already allocated for display functions. The insulation layers and signal lines are arranged in a nested configuration where the touch control circuit elements are embedded within or adjacent to the display circuit elements, maximizing space utilization without requiring additional pixel unit area
3Productivity
If in-cell touch screen panel circuit and AMOLED driving circuit are manufactured simultaneously, then manufacturing efficiency is improved, but the integration complexity increases
Solution Approach 1:
The patent merges the display circuit and touch control circuit into a single integrated pixel unit. The touch sensing module is combined with the light emitting module such that they share common structures including the pixel electrode, insulation layers, and signal lines. This merging eliminates the need for separate touch control TFTs and reduces the number of manufacturing steps, allowing simultaneous manufacturing of both display and touch control circuits in the limited pixel unit space
Solution Approach 2:
The patent applies preliminary action by designing the pixel circuit structure in advance to accommodate both display and touch control functions from the outset. The pixel electrode is pre-configured to serve dual purposes as both the light emitting electrode and the touch sensing electrode. The insulation layers and signal line routing are pre-planned to facilitate simultaneous manufacturing of both circuits, reducing the need for additional processing steps and simplifying the overall manufacturing process
Data Source
AI summary
The present disclosure relates to a field of display technology, and provides an AMOLED pixel circuit, a method for driving the same, and a display device, which can improve an integration of an in-cell touch control circuit with an AMOLED driving circuit. The AMOLED pixel circuit comprises a light-emitting module, a touch control module, a control module, an output module and a driving and amplifying module. The MOLED pixel circuit provided in embodiments of the present disclosure can be used in the manufacture of the AMOLED display device.