Touch Panel Multiple Key Press Detection and Correction

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Solution Overview

Problem

Conventional touch panel input devices face challenges in accurately selecting operation keys, especially in vehicles where vibrations and small screen sizes lead to unintended key presses, resulting in inconvenient and wasteful user operations.

Innovation Solution

The system detects multiple key presses on a touch panel screen, sets a standby state for the affected keys, and prompts the user to make a selection instruction to execute the intended processing, allowing cancellation of unintended processing without returning to a previous screen.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple operation keys are arranged in close proximity on a small touch panel screen, then the device can provide more functions, but the accuracy of key selection deteriorates due to difficulty in accurately touching the target position

Engineering Contradiction:

Improvenumber of functionsVSAvoidkey selection accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system performs preliminary detection of multiple touched keys before executing any operation. When multiple keys are detected as touched, the system identifies all candidate keys in advance and presents them for selection, rather than immediately executing the operation of a single key. This preliminary action allows the user to review and correct their input before processing occurs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system provides visual feedback by displaying icons representing the multiple touched keys on the screen. This feedback mechanism allows the user to see which keys were actually pressed and make informed selections. The feedback loop continues until the user makes a definitive selection, ensuring accurate key selection even when multiple keys are inadvertently pressed.

Inventive Principle:

Principle #23Feedback

2Speed

If the system immediately executes processing for a pressed operation key, then the response speed is fast, but unintended processing may be executed due to accidental multiple key presses

Engineering Contradiction:

Improveresponse speedVSAvoidoperation accuracy

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The system performs preliminary detection and identification of multiple touched keys before executing any operation. When multiple keys are detected, the system identifies all candidate keys and presents them for selection in advance, rather than immediately executing the operation of a single key. This preliminary action prevents unintended processing while maintaining efficient response.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies preliminary anti-action by preventing the execution of any operation when multiple keys are detected. Instead of allowing potentially erroneous operations to proceed, the system blocks automatic execution and requires explicit user confirmation through selection. This counter-measure eliminates the risk of unintended processing before it can occur.

Inventive Principle:

Principle #9Preliminary anti-action

3Device complexity

If the user must return to the previous operation screen to correct an erroneous key press, then the system maintains simple processing logic, but the user convenience deteriorates due to wasteful operations

Engineering Contradiction:

Improveprocessing logic simplicityVSAvoiduser convenience

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The system merges the correction function with the current operation screen by displaying icons of multiple touched keys directly on the same screen. Users can select the intended key from the displayed icons without navigating to a previous screen. This merging of functions maintains processing logic simplicity while dramatically improving user convenience by eliminating redundant navigation steps.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system provides self-service by automatically detecting multiple key presses and presenting correction options to the user on the current screen. The correction mechanism is integrated into the normal operation flow, allowing users to correct errors independently without system intervention or screen transitions. This self-service approach improves ease of operation while maintaining simple processing logic.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8134538B2Touch panel input device and processing execution method

Publication Date: 2012.03.13 ALPINE ELECTRONICS INC

AI summary

A touch panel input device and a processing execution method eliminates wasteful operations of a user and increases user convenience. If a state determination unit (multiple key press detection unit) detects that multiple operation keys displayed on a touch panel screen were multiply pressed, an operation control unit (first processing execution control unit) controls execution of processing corresponding to any one of the plural operation keys. A waiting unit sets a state, which causes processing to wait for a user to make a selection instruction to select and execute processing corresponding to the other operation key. If the selection instruction is accepted, the operation control unit (second processing execution control unit) controls execution of processing corresponding to the selection instruction so as to select and execute the processing corresponding to the other operation key, following the multiple key press.