Dual Display Tax Calculation Device with Multi-Rate Keys
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional calculation devices are inadequate in performing tax calculations with multiple tax rates efficiently, as they require complex operations to display tax-included total amounts based on various tax rates.
Innovation Solution
A calculation device with a processor and dual display areas, allowing for simple operation to calculate and display tax-included amounts based on multiple tax rates, with a tax calculation key associated with each rate, enabling easy display of tax-included total amounts on a secondary screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional calculation devices perform tax calculations with multiple tax rates, then tax calculation functionality is provided, but the operation becomes complex and displaying tax-included total amounts requires complex operations
Solution Approach 1:
The display is divided into a first display area for showing individual tax-included amounts and a second display area for showing the tax-included total amount. This segmentation allows the device to present multiple pieces of information simultaneously without requiring complex display switching operations, thereby maintaining versatility while improving ease of operation.
Solution Approach 2:
The patent introduces a spatial dimension to information display by using multiple display areas arranged in different positions on the display unit. Instead of sequentially displaying different pieces of information, the system displays individual tax-included amounts and their total in different spatial locations simultaneously, reducing operational complexity.
2Loss of information
If tax-included total amounts for multiple tax rates are displayed, then complete tax information is provided, but the display and operation become more complex
Solution Approach 1:
The display unit is segmented into distinct areas: a first display area for individual tax-included amounts and a second display area for the tax-included total amount. This segmentation enables complete tax information to be displayed simultaneously without increasing overall display complexity, as each area has a specific, simplified function.
Solution Approach 2:
The display unit serves multiple functions through its segmented structure: it displays individual tax-included amounts, calculates totals, and presents both pieces of information simultaneously in different areas. This multi-functionality is achieved without increasing device complexity because the segmented approach provides a clear organizational framework.
3Adaptability or versatility
If multiple tax rates are supported with dedicated keys, then tax calculation versatility is improved, but the device structure becomes more complex
Solution Approach 1:
The patent combines multiple tax rate functionalities into a unified calculation system. Instead of having separate calculation mechanisms for each tax rate, the device uses a single calculation unit that processes tax-included amounts for multiple tax rates and displays them in different areas of the display unit, thereby supporting multiple tax rates without proportionally increasing device structure complexity.
Solution Approach 2:
The calculation device is designed with universal functionality to handle multiple tax rates through a unified structure. The display unit's segmented areas and the calculation unit work together to provide multi-tax rate support without requiring separate dedicated hardware for each tax rate, thus improving versatility while controlling device complexity.
Data Source
AI summary
A calculation device comprises a display including both a first display area and a second display area, and a processor being configured to accept operations of at least one of a tax calculation key which are associated with a plurality of tax rates, respectively, to display, when the operation of the tax calculation key associated with any one of the plurality of tax rates was accepted with respect to numerical value data which indicates tax-excluded amount data displayed on the first display area, tax-included amount data on the first display area, the tax-included amount data being calculated based on the tax rate corresponding to the tax calculation key; and to display, on the second display area, tax-included total amount data which indicates a total of the tax-included amount data corresponding to at least one of the numerical value data.