Numeric Keypad Mode Indication for Image Forming Input Reliability
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Solution Overview
Problem
The connection of general-purpose input devices to image forming apparatuses often results in operational issues, such as incorrect mode switching and user confusion due to the lack of tactile feedback and clear mode indication.
Innovation Solution
An image forming apparatus with a dedicated input device featuring hardware keys, a switching key, and a light-emitting portion that maintains the NumLock LED in an on state to ensure the numerical input mode is consistently selected, preventing mode switching errors and enhancing user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a general-purpose input device is connected to the image forming apparatus, then the device compatibility and versatility are improved, but the operational reliability deteriorates due to mode switching errors and user confusion
Solution Approach 1:
The patent implements a light emitting portion (LED) that provides visual feedback to indicate the current input mode (numerical input mode or cursor movement mode). This feedback mechanism allows users to confirm the active mode, preventing operational errors caused by unintended mode switching when using general-purpose input devices with the image forming apparatus.
2Device complexity
If a touch panel is used for numerical input, then the device complexity is reduced, but the ease of operation deteriorates due to lack of tactile feedback
Solution Approach 1:
The patent combines both touch panel and physical hardware key input methods into a single integrated operating portion. The hardware key unit includes a numerical key portion with tactile feedback for reliable numerical input, while the touch panel provides a graphical interface. This merging allows users to choose the most suitable input method for their needs, maintaining simplicity while improving operational ease.
3Ease of operation
If hardware keys are added to provide tactile feedback, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The hardware key unit is designed to be externally connectable to various image forming apparatus models, providing universal functionality across different devices. The same hardware key unit can be connected to different apparatuses via standard interfaces (USB, serial, parallel), reducing overall system complexity while maintaining enhanced operational ease through tactile feedback.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively addresses the operational issues by maintaining the numerical input mode and providing clear mode indication, thereby improving user convenience and reducing errors when using general-purpose input devices with the image forming apparatus.
Implementation Method 1
a light emitting portion capable of notifying a user of that the first processing condition is set for the information processing device by being turned on and capable of notifying the user of that the second processing condition is set for the information processing device by being turned off
Data Source
AI summary
An image forming apparatus controls a general-purpose numerical key unit so as to maintain a state in which a NumLock LED is turned on in the case where a connecting cable of the general-purpose numerical key unit including a NumLock key capable of selectively switching, in a case that the general-purpose numerical key unit is connected to an information processing device including a display screen, a condition when the information processing devices processes an inputted key signal, between a first processing condition in which the key signal is processed as information on a numerical value and a second processing condition in which the key signal is processed as information for moving a cursor displayed on the display screen, and the NumLock LED capable of notifying a user of that the first processing condition is set for the information processing device by being turned on is connected to a connecting portion.