Character input method and device based on arrow key

A character input interface based on an arrow key, wherein

• when the character input interface is triggered through an up arrow key, a letter set corresponding to the up arrow key is arranged and displayed in a direction from bottom to top, and a letter selection cursor is displayed at a default position;
• when the character input interface is triggered through a down arrow key, a letter set corresponding to the down arrow key is arranged and displayed in a direction from top to bottom, and a letter selection cursor is displayed at a default position;
• when the character input interface is triggered through a left arrow key, a letter set corresponding to the left arrow key is arranged and displayed in a direction from left to right, and a letter selection cursor is displayed at a default position;
• and
• when the character input interface is triggered through a right arrow key, a letter set corresponding to the right arrow key is arranged and displayed in a direction from right to left, and a letter selection cursor is displayed at a default position.

A character input device based on an arrow key, the device comprising:

• an obtaining unit, configured to query a letter database according to triggering of an arrow key and obtain a letter set corresponding to the arrow key;
• a display unit, configured to arrange the letter set corresponding to the arrow key according to a predetermined rule, and partially or fully spread and then display the letter set in a display region;
• a cursor display unit, configured to display a selection cursor at a default position in the display region, wherein the selection cursor is used for identifying a currently selected letter;
• and
• an input unit, configured to input a letter identified by the selection cursor into a character input region according to a predetermined selection rule.