QR Code Display for Small Electronic Device Screens
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Solution Overview
Problem
Conventional methods for displaying error information on electronic devices with small displays, such as printers, face challenges in representing larger amounts of data due to the size constraints of QR codes, leading to incomplete URL displays for accessing Web sites.
Innovation Solution
The system acquires a reduced URL from an information provision server, which generates a QR code that can be displayed on the device's compact screen, allowing users to access error solution pages or shopping pages by redirecting to the actual URL through the server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a QR code with complete URL information is generated on the electronic device, then the user can access the Web site, but the QR code size becomes too large to display on the small device display
Solution Approach 1:
The URL information is segmented into two parts: a shortened access code displayed as QR code on the electronic device, and the complete URL stored on the information provision server. This segmentation allows the QR code to fit within the limited display area while preserving complete URL information on the server.
Solution Approach 2:
The information provision server acts as an intermediary between the electronic device and the target Web site. When the user scans the QR code, the server receives the access code, retrieves the corresponding complete URL, and redirects the user to the correct Web site, thus enabling complete URL functionality through a shortened code.
2Measurement precision
If more error information and model name are included in the QR code, then the error diagnosis becomes more accurate, but the QR code size increases beyond display capability
Solution Approach 1:
Error information is segmented into essential identification elements (encoded in the access code/QR code) and detailed diagnostic data (stored on the server). The QR code contains only the minimal access code needed to retrieve complete error information, maintaining small size while enabling accurate error diagnosis through server-side storage of detailed error messages and model information.
Solution Approach 2:
The information provision server serves as an intermediary that stores and manages detailed error information and model names corresponding to each access code. When a user scans the QR code, the server uses the access code to retrieve and present the complete error information and model details, thereby providing accurate error diagnosis without requiring the QR code itself to contain all this information.
Data Source
AI summary
There is a technique that displays a QR code in which a URL of an error information site is embedded on a display in a case where an error occurs in a printer or the like and allows an access to the error information site by a mobile terminal capturing the QR code. However, on a condition that the size of the display is small, there is a case where it is not possible to display the QR code in which the URL of the error information site is embedded. In an electronic device mounting a display, an access code indicating first resource specification information for redirect is created and the created access code is displayed on the display. Then, the first resource specification information has a data amount corresponding to an access code of a size than can be displayed on the display.