Stylus Input Mapping for Proportional Distortion in Touch Devices
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Solution Overview
Problem
The existing touchpads in notebook computers often experience proportional distortion when the input ratio of the touchpad is inconsistent with the display ratio, leading to an uncomfortable user experience due to distorted images when using a stylus for writing or drawing.
Innovation Solution
An electronic device with a processor that defines an effective input area and a corresponding mapping display area, adjusting the display ratio to match the input ratio, ensuring that the stylus operations are accurately and proportionally represented on the screen without distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the touchpad size is increased to provide more input space, then the input area is improved, but the display proportion becomes inconsistent causing distortion
Solution Approach 1:
The touchpad area is segmented into a effective input area and a non-effective area. The processor identifies and processes only the effective input area for stylus operations, separating it from the rest of the touchpad surface. This segmentation allows the effective input area to have a different size than the display area without causing proportion distortion, as only the effective area is used for precise input mapping.
Solution Approach 2:
Different areas of the touchpad are assigned different functions and qualities. The effective input area is optimized for stylus input with precise mapping, while other areas may serve different purposes. This local differentiation allows the touchpad to provide large input space while maintaining accurate proportion mapping in the effective area, resolving the contradiction between size and precision.
2Area of moving object
If the touchpad input ratio is made different from the display ratio to accommodate larger input area, then the input space is improved, but the output image becomes distorted
Solution Approach 1:
Instead of mapping the entire touchpad area to the display area (which causes distortion when ratios differ), the patent inverts the approach by defining a effective input area within the touchpad that matches the display area proportions. The stylus input is processed only within this effective area, ensuring accurate proportion mapping while allowing the rest of the touchpad to provide additional input space.
Solution Approach 2:
The patent changes the parameter of the effective input area size and position dynamically. The processor can adjust the boundaries and location of the effective input area based on different usage scenarios, allowing optimization of both input space and display proportion accuracy by modifying these parameters as needed.
Data Source
AI summary
An electronic device suitable for a stylus is provided. The electronic device includes a display panel, a touch module, and a processor. The display panel includes a display area. The touch module includes a touchable area. The processor is electrically connected to the display panel and the touch module. The processor defines an effective input area in the touchable area in response to the operation of the stylus, defines a mapping display area in the display area corresponding to the effective input area, and adjusts the display ratio of the mapping display area according to the input ratio of the effective input area.