Display Sensor Electrode Layout for Digitizer-Free Pen Input
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Solution Overview
Problem
Existing electronic devices lack efficient mechanisms to sense inputs from pens without the need for additional digitizers, which can increase thickness and weight and reduce flexibility.
Innovation Solution
An electronic device is designed with a substrate, a circuit layer containing a transistor, a light emitting element layer, and a sensor layer that includes specific electrode patterns and bridge patterns to differentiate between touch and pen inputs, allowing for pen input detection without a digitizer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a digitizer is added to sense pen inputs, then pen input sensing capability is improved, but device thickness and weight increase
Solution Approach 1:
The patent merges the pen sensing function with the existing display structure by integrating sensing electrodes into the display's circuit layers. The first and second sensing electrodes are formed within the display panel itself, combining multiple functions (display and pen sensing) into a single integrated structure, thereby eliminating the need for a separate digitizer layer.
Solution Approach 2:
The display panel is designed to perform multiple functions: it serves as both the light-emitting display structure and the pen sensing mechanism. The sensing electrodes are embedded within the display's circuit layers, allowing the same structure to detect both touch inputs and pen inputs, making the display panel a universal component for both visualization and input sensing.
2Adaptability or versatility
If a digitizer is added to sense pen inputs, then pen input sensing capability is improved, but device weight increases
Solution Approach 1:
The patent merges the pen sensing function with the existing display structure by integrating sensing electrodes into the display's circuit layers. The first and second sensing electrodes are formed within the display panel itself, combining multiple functions (display and pen sensing) into a single integrated structure, thereby eliminating the need for a separate digitizer layer.
Solution Approach 2:
The display panel is designed to perform multiple functions: it serves as both the light-emitting display structure and the pen sensing mechanism. The sensing electrodes are embedded within the display's circuit layers, allowing the same structure to detect both touch inputs and pen inputs, making the display panel a universal component for both visualization and input sensing.
3Adaptability or versatility
If a digitizer is added to sense pen inputs, then pen input sensing capability is improved, but device flexibility is reduced
Solution Approach 1:
The patent merges the pen sensing function with the existing display structure by integrating sensing electrodes into the display's circuit layers. The first and second sensing electrodes are formed within the display panel itself, combining multiple functions (display and pen sensing) into a single integrated structure, thereby eliminating the need for a separate digitizer layer.
Solution Approach 2:
The patent employs flexible circuit layers and thin film structures to maintain device flexibility. The sensing electrodes are formed using flexible conductive materials and thin insulating layers, allowing the entire display assembly to remain flexible and adaptable to bending or curved surfaces without requiring a rigid digitizer layer.
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 sensing of pen inputs while maintaining device thinness and flexibility by eliminating the need for a digitizer, enhancing user interaction capabilities.
Implementation Method 1
a sensor layer on the light emitting element layer, and including: a first sensing electrode including first patterns, and a first bridge pattern electrically connected to the first patterns; a second sensing electrode extending in a first direction crossing the first sensing electrode; a first electrode extending in a second direction crossing the first direction; and a second electrode including second patterns, and a second bridge pattern electrically connected to the second patterns
Data Source
AI summary
An electronic device includes: a substrate; a circuit layer on the substrate; a light emitting element layer on the circuit layer; and a sensor layer on the light emitting element layer, and including: a first sensing electrode including first patterns, and a first bridge pattern electrically connected to the first patterns; a second sensing electrode extending in a first direction crossing the first sensing electrode; a first electrode extending in a second direction crossing the first direction; and a second electrode including second patterns, and a second bridge pattern electrically connected to the second patterns. One of the first patterns includes a first region overlapping with the first electrode; one of the second patterns includes a second region overlapping with the second sensing electrode; and a first area of the first region is less than a second area of the second region.