Touch Pad Letter Input for Vehicle AVN Systems
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Solution Overview
Problem
Current audio video navigation (AVN) systems in vehicles require inconvenient multiple button presses or dial rotations for tasks like setting date and time and changing radio frequencies, making these operations difficult and time-consuming for users.
Innovation Solution
A touch pad-based letter input system that allows users to directly input letters, which are recognized and displayed on a screen, enabling simplified operation of AVN systems by automatically moving focus between input sections and providing voice feedback for confirmed inputs or deletions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If buttons or dials are used for setting date and time or changing radio frequency, then the system can be operated, but multiple button presses or dial rotations are required causing user inconvenience and increased operation time
Solution Approach 1:
The patent replaces mechanical buttons and dials with a touch pad interface that recognizes handwriting input. Users can directly write characters on the touch pad to input date, time, or radio frequency information, eliminating the need for multiple button presses or dial rotations. This substitution of mechanical interaction with graphical recognition significantly reduces operation time and improves ease of use.
2Productivity
If multiple button presses or dial rotations are required for setting, then the system can be operated, but the operation becomes difficult and time-consuming
Solution Approach 1:
The touch pad with handwriting recognition replaces complex mechanical operations with simple graphical input. Users write characters naturally on the touch pad, and the system recognizes and processes the input directly, eliminating the need for multiple sequential button presses or dial rotations. This reduces both operation time and perceived complexity.
Solution Approach 2:
The system captures the user's handwriting as an image or signal pattern on the touch pad, then recognizes and converts it into digital input data. This copying and recognition process allows direct translation of natural writing into system commands, bypassing complex mechanical interaction sequences.
3Measurement precision
If dials are used for frequency selection, then the system can be operated, but precise frequency selection requires looking at the rotating dial and adjusting rotation amount causing user inconvenience
Solution Approach 1:
The patent replaces the mechanical dial with a touch pad interface. Users write the desired frequency directly on the touch pad, and the system recognizes the written characters to set the frequency precisely. This eliminates the need to visually monitor dial rotation and manually adjust rotation amounts, making precise frequency selection both easier and more accurate.
Data Source
AI summary
A letter input system and method using a touch pad are provided to improve the function of inputting letters with an operation system within a vehicle. The system includes a touch pad that receives a writing from a user and a controller that recognizes a letter from the writing based on a transmission signal from the touch pad and outputs the recognized letter in a setting image on a display unit. The display unit displays the recognized letters in a predetermined section on the setting image based on a transmission signal from the controller.