Portable telephone keypad

• US 20050219067A1
• Filed: 04/02/2005
• Published: 10/06/2005
• Est. Priority Date: 04/02/2004
• Status: Abandoned Application

• Current Assignee: Won-Suk Chung
• Original Assignee: Won-Suk Chung
• Inventors: Chung, Won Suk
• Application Number:
  US11/097,765
• Publication Number:
  US 20050219067A1
• Time in Patent Office: Days
• US Class Current: 341/22
• CPC Class Codes: G06F 1/1616 with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
• CPC Class Codes: G06F 1/1664 Arrangements for ergonomically adjusting the disposition of keys of the integrated keyboard
• CPC Class Codes: G06F 1/1677 for detecting open or closed state or particular intermediate positions assumed by movable parts of the enclosure, e.g. detection of display lid position with respect to main body in a laptop, detection of opening of the cover of battery compartment
• CPC Class Codes: G06F 2200/1614 Image rotation following screen orientation, e.g. switching from landscape to portrait mode
• CPC Class Codes: G06F 3/0489 using dedicated keyboard keys or combinations thereof
• CPC Class Codes: H01H 2217/00 Facilitation of operation; Human engineering
• CPC Class Codes: H01H 2225/01 Different switch sites under one actuator in same plane
• CPC Class Codes: H04M 1/0222 Foldable in two directions, i.e. using a two degree of freedom hinge
• CPC Class Codes: H04M 1/0245 using open/close detection
• CPC Class Codes: H04M 1/23 Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof by improving visibility H04M1/22
• CPC Class Codes: H04M 1/72466 with selection means, e.g. keys, having functions defined by the mode or the status of the device
• CPC Class Codes: H04M 2250/70 methods for entering alphabetical characters, e.g. multi-tap or dictionary disambiguation methods for entering alphabetical characters per se G06F3/0237

Abstract

A keypad system operates in a first mode or a second mode. Each key cap is coupled to each group of adjacent two key switches. Each of first symbols is disposed on each of key caps. Two of each second symbols which is rotated 90 degrees to the first symbols are disposed over each key cap, and each of the two symbols is located over each of the key switches. When a key is actuated in the first mode, a first symbol assigned to the key cap is outputted. When a key is actuated in the second mode, a second symbol located over the actuated key switch is outputted. When there is a display operating with the keypad system, the contents of display can be oriented horizontal to the first symbols in the first mode or horizontal to the second symbol in the second mode.

Claims

1. A keypad system, comprising:

a circuit board;

a plurality of key switch means disposed on said circuit board;

a contact surface coupled to said plurality of key switch means;

a plurality of first symbols disposed upon said contact surface, wherein each of said first symbols is assigned to each group of said plurality of key switch means, each group comprising at least two adjacent ones of said plurality of key switch means.

a plurality of second symbols disposed upon said contact surface, wherein at least one of said second symbols (i) is assigned to each of key switch means, (ii) is located approximately above assigned key switch mean, and (iii) is approximately rotated 90 degrees to said plurality of first symbols;

a processor operating in a first mode or a second mode, wherein (i) when one of said plurality of key switch means in said group of plurality of key switch means is actuated in said first mode, said processor outputs a signal for a first symbol which is assigned to said group, (ii) when more than one of said plurality of key switch means in said group of plurality of key switch means are actuated simultaneously in said first mode, said processor outputs a signal for a first symbol which is assigned to said group, and (iii) when one of said plurality of key switch means is actuated in said second mode, said processor outputs a signal for a second symbol which is assigned to said actuated key switch mean; and

a switch mean for selecting mode between said first mode and said second mode.

2. A keypad system according to claim 1, wherein said switch mean for selecting mode comprises a key cap mean and a key switch mean disposed on said circuit board.

3. A keypad system according to claim 1, wherein said contact surface includes a plurality of key cap means, each of said plurality of key cap means coupled to each group of said plurality of key switch means wherein one key cap mean is shared as a contact surface for coupled group of said key switch means.

4. A keypad system according to claim 1, wherein said contact surface includes a plurality of key cap means, each of said plurality of key cap means coupled to each of said plurality of key switch means wherein key cap means in each group of said plurality of key switch means are aligned closely to each other, thereby forming a group of key cap means, and separating said group from other groups of key cap means.

5. A hand-held electronic apparatus, comprising:

an electronic device;

a screen; and

a keypad system connected to the electronic device for entering data into the electronic device, the keypad system comprising;

a circuit board;

a plurality of key switch means disposed on said circuit board;

a contact surface coupled to said plurality of key switch means;

a plurality of first symbols disposed upon said contact surface, wherein each of said first symbols is assigned to each group of said plurality of key switch means, each group comprising at least two adjacent ones of said plurality of key switch means.

a plurality of second symbols disposed upon said contact surface, wherein at least one of said second symbols (i) is assigned to each of key switch means, (ii) is located approximately above assigned key switch mean, and (iii) is approximately rotated 90 degrees to said plurality of first symbols;

a processor operating in a first mode or a second mode, wherein (i) when one of said plurality of key switch means in said group of plurality of key switch means is actuated in said first mode, said processor outputs a signal for a first symbol which is assigned to said group, (ii) when more than one of said plurality of key switch means in said group of plurality of key switch means are actuated simultaneously in said first mode, said processor outputs a signal for a first symbol which is assigned to said group, (iii) when one of said plurality of key switch means is actuated in said second mode, said processor outputs a signal for a second symbol which is assigned to said actuated key switch mean, (iv) said processor orients contents of said screen horizontal to said plurality of first symbols in said first mode, and (v) said processor orients contents of said screen horizontal to said plurality of second symbols in said second mode; and

a switch means for selecting mode between said first mode and said second mode.

6. A keypad system according to claim 5, wherein said switch means for selecting mode comprises a key cap mean and a key switch mean disposed on said circuit board.

7. A keypad system according to claim 5, wherein said switch mean for selecting mode comprises a hinge structure connecting said keypad part and said screen part wherein selection of mode between said first mode and said second mode depends on the rotated angle of said hinge structure.

8. A keypad system according to claim 5, wherein said contact surface includes a plurality of key cap means, each of said plurality of key cap means coupled to each group of said plurality of key switch means wherein one key cap mean is shared as a contact surface for coupled group of key switch means.

9. A keypad system according to claim 5, wherein said contact surface includes a plurality of key cap means, each of said plurality of key cap means coupled to each of said plurality of key switch means wherein key cap means in each group of said plurality of key switch means are aligned closely to each other, thereby forming a group of key cap means, and separating said group from other groups of key cap means.

10. A keypad system according to claim 5, wherein said plurality of first symbols comprises at least a numeric telephone-type set of symbols.

11. A keypad system according to claim 5, wherein said plurality of said second symbols comprises at least an alphabetic-type set of symbols.

12. A keypad system according to claim 11, wherein said alphabetic set of keys comprises a QWERTY keypad.