Virtual Touchpad on Touchscreen Display for Cursor Control
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Solution Overview
Problem
Traditional touchpads on laptops are cumbersome and limited in size, making it difficult to control mouse cursors on larger display screens, as they require a separate device and specific surface area for interaction.
Innovation Solution
A virtual touchpad is integrated into a touchscreen display, allowing users to interact with the operating system by translating touch inputs into mouse actions through gesture-recognition software, enabling control of a mouse cursor without the need for a physical touchpad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a traditional physical touchpad is used, then the device provides a dedicated input surface, but the touchpad occupies space on the computing device and is limited to a small area
Solution Approach 1:
The patent transitions from a physical touchpad occupying 2D space on the device to a virtual touchpad utilizing the 2D display surface. By projecting the touchpad functionality onto the display dimension, the system eliminates the need for a separate physical input surface while maintaining touchpad functionality. This dimensional shift allows the touchpad to be as large as the display itself, solving the space limitation.
Solution Approach 2:
The patent creates a virtual copy of the touchpad functionality within the display environment. Instead of using a physical touchpad hardware component, the system renders a virtual representation that responds to touch inputs. This virtual copy maintains all touchpad functions (cursor movement, clicking, scrolling) while occupying no physical space, thereby eliminating the trade-off between dedicated input surface and space consumption.
2Area of stationary object
If a virtual touchpad is implemented on the display, then space efficiency is improved and cursor control on large screens is enhanced, but the display must simultaneously present both the virtual touchpad and the GUI
Solution Approach 1:
The patent divides the display into distinct functional regions: a virtual touchpad area for input reception and a GUI display area for system interaction. This segmentation allows the display to simultaneously present both the virtual touchpad and the operating system interface without interference. The touchpad occupies a specific portion of the display while the GUI renders in the remaining area, managing the complexity through spatial organization.
Solution Approach 2:
The display serves multiple functions simultaneously: it acts as both the virtual touchpad input surface and the GUI presentation medium. By making the display universal, the system eliminates the need for separate input and output devices. The same display hardware and software infrastructure handle both touch input processing and graphical interface rendering, reducing overall system complexity despite the dual functionality requirement.
Data Source
AI summary
Embodiments described herein are directed to simultaneously presenting a virtual touchpad and a graphical user interface of an operating system on the same display. A user can interact with the OS using the virtual touchpad, and user touches are read by a touch-screen portion of the display assigned to the touchpad. Touch input software converts touch packets from user touches into data packets relevant to the screen and display resolution of either the display or a portion of the display presenting the OS. Gesture-recognition software applies rules to the converted packets to determine which actions the user meant by the touches. And an application controlling a mouse cursor manipulates the mouse cursor according to the mouse actions.