Display Coil Layout for Accurate Pen Sensing Without a Digitizer
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Solution Overview
Problem
Existing multimedia electronic devices lack efficient methods for accurately sensing inputs from pens, particularly in applications requiring precise touch inputs, without increasing thickness or weight due to the inclusion of digitizers.
Innovation Solution
The electronic device incorporates a display layer, a sensor layer, and a lower conductive layer with specific coil configurations and connecting pins, enabling both touch and pen input sensing, as well as charging, through a sensor driver that alternates between sensing and charging modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a digitizer is included to enable pen input sensing, then pen input accuracy is improved, but device thickness and weight increase
Solution Approach 1:
The patent extracts the pen sensing function from a separate digitizer layer and integrates it into the existing display structure using shared conductive layers and coil configurations, eliminating the need for a dedicated digitizer component
Solution Approach 2:
The conductive layers and driving circuits are designed to serve multiple functions: touch sensing, pen sensing, and charging operations, allowing a single structure to replace what would traditionally require separate components
2Measurement precision
If a digitizer is included to enable pen input sensing, then pen input accuracy is improved, but device thickness increases
Solution Approach 1:
The patent merges the touch sensing and pen sensing functions into a single integrated structure where the same conductive layers and driving circuits handle both touch inputs and pen inputs, eliminating the need for separate digitizer layers
Solution Approach 2:
The conductive layers and driving circuits are designed to serve multiple functions: touch sensing, pen sensing, and charging operations, allowing a single structure to replace what would traditionally require separate components
3Measurement precision
If separate touch sensing and pen sensing systems are used, then sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The conductive layers and driving circuits are designed to serve multiple functions: touch sensing, pen sensing, and charging operations, allowing a single structure to replace what would traditionally require separate components
Solution Approach 2:
The system dynamically switches between different sensing modes (touch mode, pen sensing mode, charging mode) by controlling the driving circuits, allowing one physical structure to perform multiple functions at different times
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
Enables accurate pen input sensing without the need for a digitizer, maintaining device flexibility and reducing thickness and weight, while supporting both touch and pen input functionalities.
Implementation Method 1
a lower conductive layer under the sensor layer, and including: first coils spaced from one another along a first direction; second coils spaced from one another along the first direction, each of the second coils crossing two first coils adjacent to each other from among the first coils
Data Source
AI summary
An electronic device includes: a display layer; a sensor layer over the display layer; and a lower conductive layer under the sensor layer, and including: first coils spaced from one another along a first direction; second coils spaced from one another along the first direction, each of the second coils crossing two first coils adjacent to each other from among the first coils; and connecting pins connecting ends of the first coils and ends of the second coils to one another.