Keypad Input Using Segmented Stroke Elements
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Solution Overview
Problem
Conventional portable devices with limited keypads, such as cellular phones, face challenges in efficiently and intuitively inputting English letters due to the assignment of multiple letters to a few keys, leading to errors and increased key pressings, making current input methods inconvenient and time-consuming.
Innovation Solution
A keypad apparatus that assigns basic elements representing strokes of letters to keys, allowing for intuitive input by recognizing sequential or single presses of these elements to correspond to specific letters, minimizing key pressings and mimicking handwriting direction and order.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple letters are assigned to a limited number of keys on portable devices, then the device can be made compact and portable, but the number of key pressings increases and input efficiency decreases
Solution Approach 1:
The invention segments the letter input process into basic stroke elements that can be combined to form different letters. Instead of assigning multiple complete letters to single keys, each key represents a basic stroke component, and letters are formed by sequencing these segmented stroke elements in specific patterns.
Solution Approach 2:
The invention introduces dynamic sequencing where the same basic elements can be combined in different orders and patterns to represent different letters. The system dynamically interprets the sequence and pattern of key presses rather than relying on static one-to-one letter-to-key mappings.
2Area of stationary object
If multiple letters are assigned to a single key, then the keypad can be compact, but the ease of operation deteriorates due to increased errors and complexity
Solution Approach 1:
By segmenting letters into basic stroke elements, the invention reduces the cognitive load on users. Instead of memorizing which key corresponds to which letter among multiple options, users learn a small set of basic stroke patterns that can be systematically combined, making operation more intuitive and less error-prone.
Solution Approach 2:
The basic stroke elements act as intermediaries between the physical keys and the final letter output. These intermediate elements provide a structured framework that simplifies the mapping process, making the input method more systematic and easier to operate.
3Device complexity
If conventional phone-keypad letter assignment is used, then the device structure remains simple, but the number of key pressings increases and input time is extended
Solution Approach 1:
The invention employs dynamic pattern recognition where sequences of basic element presses are interpreted as complete letters. This dynamic approach allows multiple letters to be encoded in fewer key presses by utilizing patterns and combinations, significantly reducing the time required for text input while maintaining a simple physical keypad structure.
Solution Approach 2:
The invention merges multiple letter information into single key press sequences by combining basic stroke elements. Instead of pressing each letter key individually multiple times, the system combines basic elements in patterns that represent complete letters, reducing the total number of presses required.
Data Source
AI summary
A method and apparatus for inputting letters by combining basic elements obtained by separating and symbolizing strokes of letters, so as to provide excellent letter intuitiveness and recognition. According to the present invention, a letter may be input by pressing one of or sequentially pressing two of keys to which basic elements , , , , , , , , , , and obtained by separating and symbolizing strokes of letters are assigned, and letters may be rapidly and conveniently input by minimizing key pressing paths.