Touchpad with Light-Emitting Layer for Stylus Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high manufacturing cost of professional drawing boards with touch screen functionality limits their adoption in laptops, especially for low-priced and medium-priced products, necessitating a cost-effective solution for integrating handwriting and touch functions.
Innovation Solution
A touch system with a switchable function that uses a stylus device and touchpad, where the touchpad surface is divided into functional and writing areas based on a beacon signal strength threshold, utilizing a light-emitting layer to emit lights with specific optical characteristics for identifying touched positions and generating control signals corresponding to predetermined coordinate sets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a professional drawing board with touch screen functionality is used, then handwriting function is achieved, but manufacturing cost increases
Solution Approach 1:
The touchpad is designed to serve multiple functions: it can operate as a standard touchpad for finger input and as a drawing board for stylus input. By detecting the type of input device (finger or stylus) and switching operational modes accordingly, the system eliminates the need for separate professional drawing board hardware, thereby reducing manufacturing costs while maintaining handwriting functionality
Solution Approach 2:
The patent combines the touchpad and drawing board functions into a single integrated device. The touchpad surface is used for both finger touching and stylus drawing, with the system automatically distinguishing between the two input types and activating appropriate processing modes, thus avoiding the need for separate hardware components
2Adaptability or versatility
If the touchpad surface is divided into functional area and writing area, then stylus function is activated, but device complexity increases
Solution Approach 1:
The functional area on the touchpad is dynamically adjusted based on the detected stylus position and movement. The system continuously monitors beacon signal strength and recalculates the functional area boundaries in real-time, allowing the writing area to adapt to different drawing scenarios without requiring complex pre-defined zone structures
Solution Approach 2:
The system automatically detects whether a finger or stylus is being used and self-adjusts its operational mode accordingly. When a stylus is detected through beacon signal analysis, the system automatically divides the touchpad into functional and writing areas without user intervention, simplifying the user experience while managing complexity internally
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 users to utilize both handwriting and touch modes with a lower cost, integrating general finger touch and stylus functions, allowing for efficient operation and control signal generation without the need for expensive hardware upgrades.
Implementation Method 1
emitting a first light with a first optical characteristic toward the surface by a light emitting element in a light emitting layer of the touchpad
Data Source
AI summary
An operation method of touch system with handwriting function which comprises a stylus device and a touchpad, wherein a surface of the touchpad is divided into a function area and a writing area, and the operation method comprises: sending a beacon signal by the stylus device, receiving the beacon signal by touchpad, emitting a first light toward a pattern locating in the functional area of the surface of the touchpad by a light emitting element of a light emitting layer of the touchpad when signal strength of the beacon signal is bigger than a threshold, identifying, by the touchpad, a touched position on the surface when the touchpad is touched, changing the first light emitted to the pattern to a second light by the light emitting element and generating and outputting a control signal by the touchpad when the touched position falls in the pattern.