Touch Screen Character Input Segmentation and Expansion
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Solution Overview
Problem
Conventional touch screen devices face challenges in character input due to overcrowding, leading to reduced readability and increased errors from adjacent character touches.
Innovation Solution
A method and device that partition the touch screen into array positions, allowing users to select representative characters, which are then enlarged and rearranged for input, enhancing the touch area and reducing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all characters are arranged on the touch screen, then character selection is possible, but the touch area occupied by each character becomes narrow reducing readability
Solution Approach 1:
The character input process is segmented into multiple stages: first displaying all characters in a compact grid, then upon user selection, expanding only the selected character into a larger selection area with multiple candidate positions. This segmentation allows efficient browsing without requiring large individual touch areas for all characters simultaneously.
Solution Approach 2:
The patent transitions from a two-dimensional grid layout to a three-dimensional hierarchical structure where selected characters are elevated to a prominent position with multiple selection options arranged in different spatial dimensions (up, down, left, right), effectively adding a depth dimension to the character selection interface.
2Adaptability or versatility
If all characters are arranged on the touch screen, then complete character set is available, but character arrangement becomes difficult and readability lowers
Solution Approach 1:
The character set is segmented into a comprehensive grid display for browsing, then further segmented when selected - the selected character is divided into multiple candidate positions (first, second, third positions) arranged in different directions, allowing complete character availability while maintaining ease of selection.
Solution Approach 2:
The system performs preliminary arrangement of all characters in a compact grid format before user interaction, then upon selection, pre-expands the selected character into multiple candidate positions in anticipated directions (up, down, left, right), making the complete character set accessible without requiring complex real-time arrangement.
3Area of stationary object
If touch area per character is narrow, then screen space is utilized, but input errors increase due to adjacent character touches
Solution Approach 1:
The touch area is segmented into two functional zones: a compact grid area for character browsing that maximizes screen space utilization, and an expanded selection area that appears only when a character is selected, providing sufficient touch area for accurate selection without compromising overall screen space efficiency.
Solution Approach 2:
When a character is selected, the system transitions from a two-dimensional grid to a three-dimensional selection structure where the selected character expands in multiple spatial directions (up, down, left, right) creating a larger effective touch area that reduces input errors while maintaining efficient screen space usage in the default state.
Data Source
AI summary
A method of controlling a mobile terminal, and which includes displaying a touch keypad on a touch screen of the mobile terminal, the touch keypad including character input regions, at least one specific character input region including a first character symbol and a second character symbol; displaying an output window above the touch keypad, the output window displaying character symbols touched on the character input regions; receiving a touch selection signal indicating a touch selection of the specific character input region; as long as the received touch selection signal is received, displaying the keypad and a new character input region with the second character symbol being displayed larger than the second character symbol displayed in the specific character input region; and displaying the second character symbol in the output window when the touch selection is released from the new character input region.