Tax Calculation Apparatus Display Verification Without Printing

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Solution Overview

Problem

Conventional POS systems lack the ability for users to easily verify the accuracy of tax calculations due to the separation of the operation terminal and printer, making it difficult to check the correctness of input tax calculations.

Innovation Solution

A tax calculation apparatus with a display and printer, where the processor executes tax calculations, displays the results, and allows users to check tax amounts without printing, enabling easy verification of tax calculations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If the printer prints all tax calculation data (tax-excluded amount, tax amount, tax-included amount) on the receipt, then the complete calculation content is recorded, but the user cannot easily check the correctness of the tax calculation at the operation terminal

Engineering Contradiction:

Improvetax calculation verification capabilityVSAvoiduser checking convenience

Core Design Contradiction:

Loss of informationVSEase of operation

Solution Approach 1:

The patent divides the tax calculation information into two separate output channels: essential information (tax-excluded amount, tax-included amount) is printed on the receipt, while verification information (tax amount, detailed calculation breakdown) is displayed on the operation terminal screen. This segmentation allows users to check calculation correctness at the terminal while the receipt retains only necessary printed content.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The operation terminal screen acts as an intermediary device between the tax calculation system and the user. It provides real-time display of tax calculation results including tax amount data, enabling users to verify calculations without requiring the printed receipt to contain all detailed information. The screen serves as a temporary viewing medium that supplements the printed receipt.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of information

If the printer prints all tax calculation details, then complete information is provided, but unnecessary printing increases paper consumption and printing time

Engineering Contradiction:

Improvetax calculation information completenessVSAvoidpaper consumption

Core Design Contradiction:

Loss of informationVSLoss of substance

Solution Approach 1:

The patent extracts the tax amount data and detailed calculation information from the printed receipt content and relocates it to the operation terminal display. The receipt prints only essential information (tax-excluded amount, tax-included amount), while the extracted verification details are viewed on-screen. This reduces paper consumption while maintaining information accessibility.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent transitions tax calculation verification from a two-dimensional printed medium (receipt paper) to a different dimensional medium (electronic screen display). This dimensionality change allows users to access complete tax calculation information without consuming additional paper, as the screen can display detailed information indefinitely without material consumption.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If the operation terminal and printer are separated in different positions, then the system structure is flexible, but the user cannot easily verify tax calculations at the operation terminal

Engineering Contradiction:

Improvesystem structure flexibilityVSAvoidtax calculation checking ease

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent implements a feedback mechanism where the operation terminal immediately displays tax calculation results (including tax amount) right after calculation is performed. This real-time feedback allows users to verify calculations at the point of operation without needing to wait for or examine the printed receipt. The terminal provides instant confirmation that closes the verification loop.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent performs preliminary display of tax calculation results on the operation terminal screen before the receipt is printed or while printing is occurring. Users can verify the calculation correctness in advance by viewing the displayed tax amount and breakdown, eliminating the need to physically handle or closely examine the printed receipt for verification purposes.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10410197B2Tax calculation apparatus, tax calculation method, and storage medium storing program

Publication Date: 2019.09.10 CASIO COMPUTER CO LTD

AI summary

According to one embodiment, a tax calculation apparatus includes a display, a printer and a processor. The processor is configured to execute processes of accepting a tax calculation operation by a user; deriving tax calculation result data by executing a calculation based on a numerical data, in response to a input of the numerical data and the acceptance of the tax calculation operation, causing the display to display the tax calculation result data, and causing the printer to print tax calculation print data including the tax calculation result data and tax amount data corresponding to the tax calculation result data; and causing the display to display the tax amount data without printing, if the tax calculation operation is accepted in a state in which the tax calculation result data is displayed on the display.