Pen Sensor Member With Thin Film Transistor for OLED Display
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices lack an effective solution for accurately sensing input from pens, which is essential for advanced user interactions and applications such as digital drawing and annotation, particularly in OLED display systems where pen input detection is not as refined as finger touch sensing.
Innovation Solution
A pen sensing unit is introduced, comprising a pen scan line, pen lines, and pen sensor members with thin film transistors, where the pen sensor members are configured to detect pen input by generating and sensing electromagnetic fields, allowing for precise detection of pen position and contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pen sensing unit is added to an OLED display device, then the ability to sense pen input is improved, but the device complexity increases
Solution Approach 1:
The patent combines the pen sensing unit with the existing OLED display structure by integrating pen sensor members into the display panel layers. The pen scan lines and pen data lines are merged with the display's scanning architecture, allowing pen detection functionality to be added without requiring a completely separate sensing system. This merging approach improves pen input detection accuracy while minimizing the increase in overall device complexity.
Solution Approach 2:
The sensing unit is designed with multi-functionality where the same sensor members and scanning lines serve both display control and pen input detection purposes. The pen sensor members can detect various pen inputs including contact position, pressure, and stroke information, making the sensing system versatile for different pen-based applications while avoiding the need for multiple separate sensing mechanisms.
2Reliability
If pen sensor members with thin film transistors are implemented, then pen input sensing capability is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent specifies particular parameter ranges for the thin film transistors in the pen sensor circuits, including threshold voltage ranges and dimensional specifications for the transistor components. By optimizing these parameters, the patent achieves reliable pen sensor performance while ensuring compatibility with existing thin film transistor manufacturing processes used in OLED display production, thus managing manufacturing complexity.
Solution Approach 2:
The patent applies different structural configurations to different regions of the pen sensor members based on their specific functional requirements. For example, the pen sensor members have different electrode arrangements and thin film transistor configurations depending on whether they are located in the scanning direction or data direction, allowing optimized performance for each region while using standardized manufacturing techniques.
3Measurement precision
If the pen sensor member size is increased to improve detection accuracy, then the measurement precision is improved, but the area occupied in the display increases
Solution Approach 1:
The patent enhances pen position detection accuracy by utilizing the temporal dimension through sequential scanning of pen sensor members. Instead of increasing the physical size of individual sensors, the system achieves high precision by rapidly scanning through multiple smaller sensor members in both scanning and data directions, effectively trading spatial dimension for temporal dimension to maintain accuracy while minimizing area occupation.
Solution Approach 2:
The pen sensing unit is divided into multiple discrete pen sensor members arranged in a matrix pattern across the display area. Each sensor member is small in size but collectively they provide comprehensive coverage and high detection precision through the segmentation approach. The scanning lines and data lines are also segmented to interface with individual sensor members, allowing precise localization without requiring large individual sensor elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The pen sensing unit enables accurate and reliable detection of pen input, enhancing user interaction capabilities in display devices by providing precise coordinates and contact points, thereby improving the functionality of pen-based applications.
Implementation Method 1
the pen sensor members are configured to detect pen input by generating and sensing electromagnetic fields
Data Source
AI summary
A pen sensing unit and a display device are disclosed. The pen sensing unit comprises a first pen line, a pen scan line, and a pen sensor member. The first pen line extends in a first direction. The pen scan line extends in a second direction that intersects the first direction. The pen sensor member is connected to the first pen line and the pen scan line. The pen sensor member is configured to sense input from a pen. The pen sensor member comprises a pen sensor and a pen sensor circuit. The pen sensor circuit is connected to a first end of the pen sensor. The pen sensor circuit comprises a first thin film transistor.