Dual-Screen Display Apparatus with Segmented Touch Sensors
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Solution Overview
Problem
Existing dual-screen display devices face challenges in simultaneously detecting finger and pen inputs with high accuracy when folded, as existing hybrid touch sensor systems require multiple detection methods on a single screen, increasing complexity and cost.
Innovation Solution
A display apparatus with two casings, one equipped with a capacitive touch sensor for finger input and the other with an inductive touch sensor for pen input, where the sensors can detect inputs even when the screens are overlapped, with the inductive touch sensor's hovering amount set larger than the casing thickness to accommodate pen inputs through the capacitive touch sensor screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hybrid touch sensor system with multiple detection methods is employed on a single screen, then both finger input and pen input can be detected simultaneously, but the device complexity and cost increase
Solution Approach 1:
The display device is divided into two separate screens, each equipped with a different touch sensor type. The first screen has a capacitive touch sensor for finger input, while the second screen has an inductive touch sensor for pen input. This segmentation allows each sensor to be optimized for its specific input type without the complexity of implementing multiple sensor types on a single screen.
Solution Approach 2:
The overlapping dual-screen structure enables a single screen (the second screen with inductive touch sensor) to serve multiple functions: it can detect both direct pen inputs on its surface and indirect pen inputs through the first screen when the device is folded. This multi-functionality reduces the need for separate detection systems.
2Adaptability or versatility
If the inductive touch sensor's hovering amount is set larger than the casing thickness, then pen inputs can be detected through the overlapped first screen, but the sensor design becomes more challenging
Solution Approach 1:
The inductive touch sensor is designed with a specifically increased hovering amount (detection distance) that exceeds the thickness of the first casing. This parameter change allows the sensor to detect pen inputs even when the first screen is positioned between the pen and the second screen, enabling functional versatility while maintaining manufacturability through controlled sensor specification.
3Reliability
If both screens are equipped with touch sensors, then both can independently detect inputs, but the cost and complexity increase
Solution Approach 1:
The device uses two separate screens with different touch sensor types positioned in different spatial locations. The first screen (capacitive) handles finger inputs, while the second screen (inductive) handles pen inputs. This segmentation maintains reliable input detection for different input types while avoiding the complexity of implementing multiple sensor types on each individual screen.
Solution Approach 2:
The first screen acts as an intermediary element that can be penetrated by pen inputs. When the device is folded, the first screen allows pen inputs to pass through to the second screen's inductive touch sensor, enabling the second screen to detect pen inputs indirectly while the first screen continues to detect finger inputs independently.
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 simultaneous and accurate detection of both finger and pen inputs without the need for multiple sensors on a single screen, reducing costs and improving usability when the devices are folded, while maintaining detection accuracy.
Implementation Method 1
a first screen including a first touch sensor to receive a finger input
Implementation Method 2
a second screen including a second touch sensor to receive a pen input
Data Source
AI summary
A display apparatus includes a first casing including a first screen including a first touch sensor to receive a finger input and a second casing including a second screen including a second touch sensor to receive a pen input. As the first casing and the second casing are overlapped with each other, the first screen and the second screen overlap with each other.