| 摘要 |
PURPOSE: A keypad of a portable terminal for the visually impaired is provided to realize braille points showing numbers assigned to number key buttons, respectively, and to realize the braille points by reading braille patterns only differently arrayed between the numbers, thereby enabling a user to easily recognize the braille points. CONSTITUTION: A send button(421) is used for making calls, and uses braille patterns showing the first consonant letter of Korean alphabet. The first lower row of a braille pattern of the first consonant letter is realized in the same method as number patterns. Patterns of an upper row do not overlap with the number patterns, applicable to the send button(421). An end button(423) is used for turning on/off power, and uses patterns diagonally symmetrical to the send button(421). Such the patterns do not overlap with the number patterns, applicable to a keypad(400). A specific symbol can be embossed on a key button(431), or can form a braille pattern.
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