T9 keyboard for minimum syllable guided accurate full pinyin input

A Nine-Grid keyboard with the precise full-Pinyin input of the minimum syllable-oriented, characterized by:

• it consists of a Nine-Grid main-level keyboard with five additional vowel-finals keys, A, E, U, I and O, and combines the minimum syllable-oriented input sub-keyboards of eight full-mapping levels, and when the conversion conditions of Pinyin syllables are satisfied, the input key is clicked from the keys marked as 2-9 of main-level keyboard, so as to trigger switching to the input sub-keyboard of each mapping level, and any click input of the input sub-keyboard at each mapping level will return to the main-level keyboard, and the precise full-Pinyin input can be realized on the Nine-Grid keyboard through the minimum syllable-oriented and five additional vowel-finals keys;
• wherein, the layout and trigger switching of the Nine-Grid main-level keyboard and the minimum syllable-oriented input sub-keyboards of full-mapping levels are as follows:
• the Nine-Grid main-level keyboard is arranged as follows:
• the ABC key of the standard Nine-Grid keyboard is marked as BCA key, the DEF key as DFE key, the MNO key as NMO key, and the JKL key as KJL key;
• in addition, the vowel-finals A key is added on the far left side of the first line, the vowel-finals E key is added on the far right side of the first line, the vowel-finals I key is added on the far left side of the second line, the vowel-finals O key is added on the far right side of the second line, and the vowel-finals U key is added on the far left side of the third line;
• the oriented input sub-keyboards of the eight full-mapping levels are arranged as follows:
• each contains nine different the minimum syllable-oriented keys, whose mapping positions correspond to the keys marked as 1-9 on the main level keyboard one by one, and the other auxiliary keys are exactly the same as the five additional vowel-finals keys A, E, U, I, O on the main-level keys, wherein, the minimum syllable-oriented keys are:
• the minimum syllable consists of one initials and one of the six vowel-finals a, e, u, v, i, and o, which contain two letters, the first initials of the eight letter keys BCA, DFE, GHI, KJL, NMO, PQRS, TUV and WXYZ in the main-level keyboard is the minimum syllable candidate initials;
• and the underlined initials are the minimum syllable preferred initials;
• the minimum syllable-oriented keys of all preferred initials and vowel-finals effective combinations should be distributed at a certain full-mapping level or at the adjacent vacancies of the minimum syllable-oriented keys of full-mapping level, when the minimum syllable-oriented keys of all preferred initials and vowel-finals effective combinations are full;
• the minimum syllable candidate initials click can be on-screen displayed, and part of the minimum syllable of the candidate initials combinations can occupy the remaining vacancies after arranged the minimum syllable of all preferred initials and vowel-finals combinations in the same full-mapping level;
• the double initials keys zh, ch, sh and special finals er, which are equally important to the minimum syllable-oriented keys of all preferred initials and vowel-finals combinations, are not the minimum syllable combination , and are the four special cases of the extension of the definition of the minimum syllable-oriented keys;
• the main-level keyboard and each full-mapping levels with the minimum syllable-oriented input sub-keyboards trigger switching is specifically:
• the eight-letter keys marked as 2-9 of main-level keyboard click triggers switching to input sub-keyboards of full-mapping levels, when the initial click of each Pinyin syllable is inputted or when the character terminator “'” is inputted before clicking, and the input sub-keyboards of full-mapping levels switch back to the main-level keyboard every time the input is clicked;
• when the input Pinyin syllable is not finished, the eight-letter keys marked as 2-9 of the main-level keyboard click input the GHI or NMO key, and the main-level keyboard remains unchanged, that is, only the lowercase letter g or n of the corresponding key of the main keyboard is inputted;
• when the current input is one of the five additional vowel-finals keys “A, E, U, I, O” of the main-level keyboard, the main-level keyboard remains unchanged;
• when the current input is one of the five additional vowel-finals keys “A, E, U, I, O” of the input sub-keyboards of full-mapping levels, it directly results in the switch from the input sub-keyboards of full-mapping levels to the main-level keyboard;
• the precise Pinyin input refers to the traditional Nine-Grid input usually has multiple Pinyin syllables, and the precise Pinyin input Pinyin syllables are uniquely determined.