Electromagnetic Board Horizontal Scroll Bar via Controller Mapping
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Solution Overview
Problem
Conventional electromagnetic boards can only implement a vertical scroll bar through electromagnetic induction, failing to meet requirements for horizontal scroll bar operations, which increases costs and area usage with additional hardware or lacks functionality in applications needing both.
Innovation Solution
A method and apparatus that define and implement both horizontal and vertical scroll bars on an electromagnetic board using a controller to determine positional changes of an electromagnetic pen, allowing for virtual scrolls to be mapped into computer inputs without additional hardware, utilizing a combination of horizontally and vertically arranged coils, analog switches, a measurer, and signal generators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional hardware designs are used to implement a horizontal scroll bar, then the horizontal scroll bar function is achieved, but the cost and area increase
Solution Approach 1:
The electromagnetic board's existing coil system is made multi-functional by programming the controller to interpret pen movements in different regions as either horizontal or vertical scroll bar operations. The same hardware components (coils, pen, controller) serve both original writing/drawing functions and new scroll bar functions through software configuration rather than additional hardware.
Solution Approach 2:
The patent creates a virtual copy of the scroll bar interface within the electromagnetic board's coordinate system. By defining virtual scroll bar regions and mapping pen movements within these regions to scroll bar interactions, the system replicates scroll bar functionality through software simulation rather than physical hardware duplication.
2Device complexity
If electromagnetic induction way is used to implement scroll bar, then the cost is reduced, but only vertical scroll bar is achieved without horizontal bar
Solution Approach 1:
The patent extends the functionality from one dimension (vertical scrolling only) to two dimensions (both horizontal and vertical scrolling) by utilizing the planar coordinate system of the electromagnetic board. The controller identifies the region within which the pen moves and applies different interpretation rules: movements in the horizontal direction trigger horizontal scrolling, while vertical movements trigger vertical scrolling, thus achieving bidirectional scroll bar functionality.
Solution Approach 2:
The system dynamically adjusts its interpretation of pen movements based on the current region and movement direction. The controller continuously monitors pen position and determines whether the pen is moving within a defined scroll bar region, then dynamically applies the appropriate scroll bar behavior (horizontal or vertical) based on the movement characteristics, making the system adaptable rather than fixed.
3Adaptability or versatility
If virtual scrolls are mapped into computer scroll bars, then complete scroll bar functions are achieved, but the system complexity increases
Solution Approach 1:
The controller performs preliminary actions by pre-defining scroll bar regions and their characteristics before actual scroll operations begin. The system establishes the coordinate ranges, movement thresholds, and mapping rules in advance, so that during operation, the controller only needs to check whether the pen is within the predefined region and apply the corresponding scroll behavior, rather than computing complex mappings in real-time.
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 complete scroll bar functions on existing electromagnetic boards without increased costs, satisfying user operations for both horizontal and vertical scroll bars, thus overcoming the limitations of prior art by integrating both functionalities within the existing device.
Implementation Method 1
A scroll bar is similar to a wheel of a mouse, that is, a peripheral device for transferring scroll information to the computer... by which it is possible to transfer data, such as coordinates for a movement trace, magnitudes of pressure, and tilt angles, of an electromagnetic pen over the electromagnetic board to the computer
Data Source
AI summary
There are provided a method and an apparatus for scroll information input in an electromagnetic induction way. The method comprises steps of: definition of scroll bars, where a horizontal scroll bar and a vertical scroll bar are defined for an electromagnetic board by means of a controller of the electromagnetic board; implementation of scrolls, where virtual scrolls for the scroll bars of the electromagnetic board are achieved based on positional changes of an electromagnetic pen over the horizontal scroll bar and the vertical scroll bar of the electromagnetic board; and mapping of scrolls, where the virtual scrolls for the scroll bars of the electromagnetic board are mapped into scrolls for scroll bars in a computer by means of the controller.