Sliding Display Digitizer Segmentation for Touch Precision
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Solution Overview
Problem
Existing display devices face challenges in providing precise touch input, especially when using electronic pens, and lack flexibility in design and volume reduction.
Innovation Solution
A slidable display device with a flexible display panel, a main digitizer, and sub-digitizers, where the sub-digitizers move in accordance with the sliding behavior of the display panel, allowing for precise touch input and flexible design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a flexible display panel with sliding mechanism is used, then volume reduction and design flexibility are improved, but touch input precision deteriorates
Solution Approach 1:
The display device is segmented into multiple independent digitizer modules (main digitizer and sub-digitizers) that can be positioned at different locations. Each digitizer module independently detects touch inputs, ensuring precision is maintained regardless of the sliding mechanism's movement or compression state.
Solution Approach 2:
A flexible printed circuit board serves as an intermediary to electrically connect the main digitizer and sub-digitizers. This intermediary maintains electrical connectivity between digitizer modules even when the display panel is compressed or expanded during sliding, ensuring continuous precise touch input detection.
2Measurement precision
If multiple digitizer modules are used to maintain touch precision, then touch input precision is improved, but device complexity increases
Solution Approach 1:
Multiple digitizer modules (main digitizer and sub-digitizers) are merged into a unified touch detection system. The controllers integrate signals from all digitizer modules, allowing the system to function as a single cohesive unit for touch input detection rather than separate independent systems.
Solution Approach 2:
The digitizer modules are designed with universal functionality to detect various types of touch inputs (fingertip, electronic pen, knuckle) regardless of their position on the display. The same detection principles and controller logic apply to all digitizer modules, reducing overall system complexity.
3Adaptability or versatility
If sub-digitizers are positioned on sliding areas, then adaptability to sliding behavior is improved, but manufacturing precision requirements increase
Solution Approach 1:
The sub-digitizers are dynamically positioned on the sliding areas rather than being fixed to the main body. This allows the digitizers to move with the sliding mechanism, maintaining their functional relationship with the display areas they serve regardless of the device's expanded or compressed state.
Solution Approach 2:
The flexible printed circuit board uses flexible thin film technology to connect the main digitizer and sub-digitizers. This flexible connection accommodates the movement and positioning variations of sub-digitizers on sliding areas without requiring extremely precise manufacturing tolerances.
Data Source
AI summary
A display device includes: a display panel including a flat area and a first sliding area adjacent to the flat area in a first direction and configured to slide in the first direction; a main digitizer disposed on the flat area of the display panel; a first sub-digitizer disposed on the main digitizer and partially overlapping with the main digitizer in a thickness direction; and a flexible printed circuit board electrically connecting the main digitizer with the first sub-digitizer.