Application Layout Scaling via User Distance and PPD
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Solution Overview
Problem
Image display devices face challenges in scaling application layouts effectively due to differences in display region sizes and pixel densities, leading to objects appearing too large or small, and varying information presentation across devices.
Innovation Solution
An apparatus and method that generate a scaling variable based on the distance between the image display device and the user, considering the device's resolution and display region size, to adjust the layout and object sizes accordingly, using Pixels Per Degree (PPD) and Dots Per Inch (DPI) calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the layout is scaled based on resolution ratio, then the application can be displayed on different resolution devices, but objects appear too large or too small due to pixel density differences
Solution Approach 1:
The patent changes the scaling parameter from resolution ratio to PPD (Pixels Per Degree) ratio. By calculating PPD based on both resolution and display region size, the system achieves accurate object size representation across different devices. The scaling factor is computed as PPD_display/PPD_reference, which accounts for both resolution and physical display dimensions, resolving the issue of objects appearing too large or small.
2Adaptability or versatility
If the layout is scaled based on resolution, then device compatibility is improved, but the amount of information presentable in a unit display region varies due to pixel density differences
Solution Approach 1:
The patent uses PPD (Pixels Per Degree) as the scaling parameter, which incorporates both resolution and display region size. This ensures that the same amount of information is presented in the same visual space across different devices, maintaining consistent information density while achieving device compatibility.
3Adaptability or versatility
If different scaling methods are used for different devices, then display compatibility is achieved, but the user experience becomes inconsistent across devices
Solution Approach 1:
The patent establishes a unified scaling method based on PPD that works consistently across all devices. By using the formula scaling_factor = PPD_display/PPD_reference, the system achieves both device compatibility and consistent user experience, as the same calculation logic applies to all displays regardless of their specific resolution or size characteristics.
Data Source
AI summary
An apparatus and method for scaling a layout of an application in an image display device are provided. The method for scaling includes generating a scaling variable considering a distance between the image display device and a user, and scaling a layout of an application using the scaling variable.