| 摘要 |
The present invention relates to a key board for a small-sized mobile device, and a semi-compact keyboard which can provide an increased area of each key in comparison with an existing full keyboard and enables easy input by greatly reducing an increase in the number of key inputs compared with the enlarged area. The semi-compact keyboard according to the present invention has a basic arrangement of a full keyboard for a computer and is provided as a 7-7-5 type keyboard (the numbers of keys from first to third rows are 7, 7 and 5, respectively) or a 8-8-6 type keyboard (the numbers of keys from first to third rows are 8, 8 and 6, respectively) according to the provided keys. Therefore, when characters corresponding to the number of keys reduced in each row are rearranged at other character keys, as posterior characters, the characters having relatively low frequency use in the same row are rearranged to left and right at other neighboring character keys thereof as the posterior characters on the basis of original positions. In addition, an interface for inputting each character arranged at a double key enables an input of a prior character using one touch and the input of the posterior character using two touches. The present invention has a greater key area in a small-sized portable information device and is very similar to a computer keyboard with respect to the number of input keys so as to largely reduce input stress of a user. |
