CN1786884A - Apparatus for improving key identification accuracy in terminal of requiring multi-keys and method thereof - Google Patents
Apparatus for improving key identification accuracy in terminal of requiring multi-keys and method thereof Download PDFInfo
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- CN1786884A CN1786884A CNA2005100777637A CN200510077763A CN1786884A CN 1786884 A CN1786884 A CN 1786884A CN A2005100777637 A CNA2005100777637 A CN A2005100777637A CN 200510077763 A CN200510077763 A CN 200510077763A CN 1786884 A CN1786884 A CN 1786884A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/0202—Constructional details or processes of manufacture of the input device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/34—Microprocessors
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
An apparatus for enhancing accuracy of key recognition in a terminal demanding plural keys and a method thereof are provided. The said apparatus comprises an MCU(Micro Control Unit), a keypad enable logic providing unit, a keypad, and a key inputting voltage level generating unit. The MCU, including an ADC port and an interrupt port, checks an ADC value and performs a key mapping operation. The keypad enable logic providing unit offers a keypad enable logic to the MCU. The keypad includes plural keys. The key inputting voltage level generating unit generates a key inputting voltage level if a key value is inputted at the keypad and transmits the key value to the MCU via the ADC port and the interrupt port for accurately recognizing the key value. In the portable terminal, wherein IM (instant message)handset requires for plural keys for letter and digital input, the terminal port for key recognizing and the associated resource achieve minimizing, at the same time the accuracy of key recognizing and stability are increased.
Description
Technical field
The present invention relates to require the terminal of a plurality of keys, particularly relate to a kind of devices and methods therefor that in requiring the terminal of a plurality of keys, improves the key identification accuracy, at IM (Instant Messaging) mobile phone etc. for literal and numeral input and require in the pocket terminal of a plurality of keys, the port and the related resource that can be used in key identification are realized minimizing, improve the accuracy of key identification, improve stability.
Background technology
Generally speaking, the pocket terminal is meant small-sized end device, can hold with a hand, carries out input operation in moving.
This pocket terminal has been used a plurality of keys for input characters, numeral or special symbol etc.
For this reason, existing is number according to applied key, row (Row) and row (Column) are constituted matrix (matrix), and main control unit (MCU:Main Control Unit) is imported by key flutter identification keys such as (keychattering), or externally uses other conversion equipment.
Fig. 1 has the formation block diagram that uses the key input apparatus of key matrix in requiring the terminal of a plurality of keys now.
As shown in the figure, Reference numeral 1 is the MCU that device is carried out the main control function, and Reference numeral 2 is the ports that are positioned at above-mentioned MCU and import from the keypad received signal, Reference numeral 3 is keypads, that is, a plurality of keys are constituted matrix-style, transmit key assignments to above-mentioned MCU1 by above-mentioned port 2.
Further describe the action of the existing apparatus that as above constitutes below.
At first, (some among the Key_11 ~ Key_nn), the signal of correspondent button then passes to the port 2 of MCU1 if the user supresses a plurality of keys in keypad 3.So MCU1 resolves by port 2 and transmits the key assignments of coming, and identifies corresponding key assignments.
For example, when pressing Key_11, the Column1 of port 2 and the signal between Row1 link together.So, MCU1 recognizes Column1 and is connected with the signal of Row1, recognizes the Key_11 key of supressing keypad 3.
On the other hand, for the situation of externally using conversion equipment, use converter, receive the key assignments input with external integrated (IC:Integrated Circuit).
But but there are the following problems for this existing technology.
That is, using under the situation of key matrix, the increase of the number of the key that will use along with terminal needs press the port of corresponding proportion distribution MCU1, if reach the boundary of port number, and utility key more then.
In addition, for the situation of externally using conversion equipment, the corresponding rising of other fee of material, and require to stablize the required operation of steering logic inevitably.
Summary of the invention
The present invention proposes in order to solve above-mentioned existing every problem just, the object of the present invention is to provide a kind of devices and methods therefor that in requiring the terminal of a plurality of keys, improves the key identification accuracy, at IM mobile phone etc. for literal and numeral input and require in the pocket terminal of a plurality of keys, the port and the related resource that can be used in key identification are realized minimizing, improve the accuracy of key identification, improve stability.
For realizing as above purpose, the device that in requiring the terminal of a plurality of keys, improves the key identification accuracy in the one embodiment of the invention, its constitutive characteristic is to comprise following several sections:
MCU, it has ADC port and interruptive port, checks the ADC value, the execute key mapping; The keypad enable logic provides portion, and it provides the keypad enable logic to above-mentioned MCU; Keypad, it has a plurality of keys; Key input voltage level generating unit, when behind above-mentioned keypad input key assignments, it generates the key input voltage level, passes to above-mentioned MCU by above-mentioned ADC port and interruptive port, and key assignments is correctly discerned.
For realizing as above purpose, the method that improves the key identification accuracy in requiring the terminal of a plurality of keys in the one embodiment of the invention is characterized in that comprising following several steps:
The 1st step after keypad starts, is converted to the required pattern of using to keypad, carries out ADC; The 2nd step after above-mentioned the 1st step, if through still there not being the key input after the certain hour, then keeps key input holding state; The 3rd step after above-mentioned the 2nd step, if the key input is arranged, is then checked the ADC value, and the execute key mapping after interrupting value changes, is returned above-mentioned the 2nd step, prevents key input interpretation mistake.
In sum, the present invention improves the key identification accuracy in requiring the terminal of a plurality of keys devices and methods therefor has following effect, promptly, at IM mobile phone etc. for literal and numeral input and require in the pocket terminal of a plurality of keys, the port and the related resource that can be used in key identification are realized minimizing, improve the accuracy of key identification, improve stability.
Description of drawings
Fig. 1 has the formation block diagram that uses the key input apparatus of key matrix in requiring the terminal of a plurality of keys now;
Fig. 2 is the formation block diagram that improves the device of key identification accuracy in requiring the terminal of a plurality of keys of the present invention;
Fig. 3 is the process flow diagram that improves the method for key identification accuracy in requiring the terminal of a plurality of keys.
Wherein, Reference numeral:
1:MCU 2: port
3: keypad 10:MCU
11:ADC end 12: interruptive port
20: the keypad enable logic provides portion 30: keypad
40: key input voltage level generating unit 41～44: keypad value efferent
45:ADC reference voltage efferent 46: interrupt the reference voltage efferent
Embodiment
With reference to the accompanying drawings, illustrate that the present invention improves an embodiment under the technological thought of devices and methods therefor of key identification accuracy in requiring the terminal of a plurality of keys.
Fig. 2 is the present invention improves the device of key identification accuracy in requiring the terminal of a plurality of keys a formation block diagram.
As shown in the figure, it is made of following several sections: MCU10, and it has ADC port one 1 and interruptive port 12, checks analog-digital conversion (ADC:Analog-to-Digital Conversion) value, execute key mapping (Key Mapping); The keypad enable logic provides portion 20, and it provides the keypad enable logic to above-mentioned MCU10; Keypad 30, it has a plurality of keys; Key input voltage level generating unit 40, if imported key assignments from above-mentioned keypad 30, it generates the key input voltage level, passes to above-mentioned MCU10 by the above-mentioned ADC port one 1 and the middle broken ends of fractured bone 12, so that key assignments is correctly discerned.
Wherein, key input voltage level generating unit 40 is made of following several sections: keypad value efferent (41～44), and after the key of above-mentioned keypad 30 was pressed, it outputed to ADC port one 1 in the above-mentioned MCU10 to the keypad value; ADC is with reference voltage efferent 45, and it is connected between the ADC port one 1 in above-mentioned keypad value efferent (41～44) and the above-mentioned MCU10, exports the ADC reference voltage; Interrupt with reference voltage efferent 46, it is connected between above-mentioned keypad 30 and the above-mentioned keypad value efferent (41～44), is connected to the interruptive port 12 in the above-mentioned MCU10, and output interrupts using reference voltage.
Wherein, the keypad enable logic provides portion 20 to provide the keypad enable logic to above-mentioned MCU10, and the effect of keypad enable logic is, after keypad starts, keypad is converted to uses required pattern, carry out ADC, if behind the process certain hour, still there is not the key input, then keep key input holding state,, then check the ADC value if the key input is arranged, the execute key mapping, after interrupting value changes, keep key input holding state, prevent key input interpretation mistake.
Above-mentioned unaccounted symbol Key_1 to Key_n is meant a plurality of keys in the keypad, V_KEY is meant voltage, R ref is meant reference resistance, R1 to Rn is meant the resistance of distributing to each key, and ADC point is that keypad value efferent (41～44) and ADC use the place between reference voltage efferent 45 and the ADC port one 1.
Fig. 3 is presented at the process flow diagram that improves the method for key identification accuracy in the terminal that requires a plurality of keys.
As shown in the figure, it comprises following several steps: (ST11～ST13), after keypad starts, keypad is converted to the required pattern of using carries out ADC to the 1st step; The 2nd step (ST14, ST15) after above-mentioned the 1st step, if through still there not being the key input after the certain hour, then keeps key input holding state; (ST16～ST19), after above-mentioned the 2nd step, if the key input is arranged, then check the ADC value, the execute key mapping after interrupting value changes, is returned above-mentioned the 2nd step to the 3rd step, prevents key input interpretation mistake.
Wherein, (ST16～ST19) also comprises following several steps: whether after above-mentioned the 2nd step, differentiate interrupting value is low step ST16 to the 3rd step; If above-mentioned interrupting value is not low, then think the input of no key, carry out above-mentioned the 2nd step, if above-mentioned interrupting value is low, then regarded as the key input, carry out the step ST17 of ADC; After above-mentioned ADC carries out, check the ADC value, execute key mapping steps ST18; Whether after having carried out above-mentioned ADC value inspection and key mapping, differentiating interrupting value is high step ST19; If above-mentioned interrupting value is not high, a key of then regarding as in the keypad 30 is in down state, keeps holding state, if above-mentioned interrupting value is high, then returns above-mentioned the 2nd step, so that can import the step of new key assignments.
With reference to the accompanying drawings, describe as above the present invention of formation improves the devices and methods therefor of key identification accuracy in requiring the terminal of a plurality of keys action in detail.
At first it may be noted that the objective of the invention is, for literal and numeral input and require in the pocket terminal of a plurality of keys, the port and the related resource that can be used in key identification are realized minimizing, correctly discern key assignments at IM mobile phone etc.
For this reason, as shown in Figure 2, the present invention includes MCU10, the keypad enable logic provides portion 20, keypad 30, key input voltage level generating unit 40.
MCU10 has the ADC port one 1 of the output of the keypad value efferent (41～44) that is used to receive in the key input voltage level generating unit 40 and ADC usefulness reference voltage efferent 45, and be used to receive the interruptive port 12 that interrupts with the output of reference voltage efferent 46, and check the ADC value, execute key shines upon.In addition, it receives keypad enable logic and the execution that portion 20 is provided from the keypad enable logic, correctly discerns key assignments.
The keypad enable logic provides portion 20 to provide the keypad enable logic to MCU10.Wherein, so-called keypad enable logic is meant a kind of logic with following function, promptly, after keypad starts, keypad is converted to uses required pattern, carry out ADC, if through still there not being the key input behind the certain hour, then keep key input holding state,, then check the ADC value if the key input is arranged, the execute key mapping, after interrupting value changes, keep key input holding state, prevent key input interpretation mistake.
Keypad 30 has a plurality of keys (Key_1～Key_n), be used to import key assignments.
The effect of key input voltage level generating unit 40 is that after having imported key assignments from keypad 30, it generates the key input voltage level, passes to MCU10 by ADC port one 1 and interruptive port 12, and key assignments is correctly discerned.
Key input voltage level generating unit 40 is made of with reference voltage efferent 46 with reference voltage efferent 45, interruption keypad value efferent 41～44, ADC.
The effect of keypad value efferent 41～44 is behind the key of pressing keypad 30, and the keypad value is outputed to ADC port one 1 in the MCU10, and it is made of the resistance of distributing to each key.
ADC is connected between the ADC port one 1 in keypad value efferent 41～44 and the MCU10 with reference voltage efferent 45, is made of the reference resistance (R_ref) that receives voltage (V_KEY) input, is used to export the ADC reference voltage.
Therefore, press the key of keypad 30 after, enter ground state, key assignments passes to ADC port one 1 by keypad value efferent (41～44).
Interrupt being connected between keypad 30 and the keypad value efferent (41～44) with reference voltage efferent 46, be made of the reference resistance (R_ref) that receives voltage (V_KEY) input, so that be connected to the interior interruptive port 12 of MCU10, output interrupts using reference voltage.
Therefore, press the key of keypad 30 after, enter ground state, from interrupting being reduced to low level with the look-at-me that reference voltage efferent 46 is imported the interruptive port 12 of MCU10 with high level.And, after the state of pressing the key of keypad 30 is removed, once from interrupting reverting to high level again with the signal that reference voltage efferent 46 is imported the interruptive port 12 of MCU10 with high level.
Further describe action of the present invention below.
At first, differentiate keypad and whether be in starting state, see step ST11.
If keypad is not a starting state, then stop ADC, before keypad becomes startup, keep holding state, see step ST12.
If the user has started keypad 30 for using functions such as IM, then terminal is converted to the required pattern of using to keypad, carries out ADC, sees step ST13.
Whether certain hour has imported the value of keypad after differentiating, and judges whether overtimely, sees step ST14.
When behind the process certain hour, still not having the key input, then stop ADC, enter key input holding state is seen step ST15.
And whether be low level signal, see step ST16 if differentiating look-at-me.
If look-at-me is not a low level signal, but high level signal then keeps key input holding state.
On the other hand, if (press particular key among the Key_1～Key_n), MCU10 is interrupted, beginning ADC sees step ST17 to a plurality of keys of user on keypad 30.
That is, press the key of keypad 30 after, be connected with ground connection, will be converted to low level to the interruptive port 12 of MCU10 with the look-at-me of high level transmission from interrupting reference voltage efferent 46.After look-at-me so was converted to low level, MCU10 carried out ADC.
In addition, ADC is with reference voltage efferent 45 and interrupt the reference resistance (R_ref) and the resistance of distributing to the keypad value efferent (41～44) of each key (R1～Rn) performance voltage divider effect of reference voltage efferent 46, therefore, specific voltage level takes place at ADC Point place.MCU10 to specific voltage level is carried out analog to digital (A/D:Analog-to-Digital) conversion checks the ADC value, the execute key mapping, and being identified as is and the corresponding key of detected voltage level to see step ST18.
After a key assignments of input like this is handled, differentiate look-at-me and whether become high level, see step ST19.
If look-at-me is not a high level, but keep low level state, then judge it is that keypad 30 is in the state that a key is pressed, keep holding state.
In addition, if look-at-me reverts to high level, then keep key input holding state again, so that can import new key assignments.
Wherein, to be converted to high level be that state that the key at keypad 30 is pressed takes place when removing to look-at-me.That is, state that the key of keypad 30 is pressed is cut off with being connected of ground connection after removing since with cut-outs that be connected of ground connection, interrupt can importing interruptive port 12, so above-mentioned conversion taken place with the high level signal of reference voltage efferent 46.
Before the signal level of interruptive port 12 reverts to high level again,, also will be left in the basket even the variation of ADC value occurs.That is, press under the state of the some keys in the key of keypad 30 the user, if pressed other key, other key assignments is left in the basket so, thereby can prevent the interpretation mistake of key input.
So, the present invention is in the pocket terminal, and the port and the related resource that are used in key identification have been realized minimizing, and has improved the accuracy of key identification, has improved stability.
And, compared with prior art, the present invention can realize the key input identification of more a plurality of numbers with a small amount of port or resource, increases even need be applied to the number of the key of terminal, also can need not to append exterior I C or distribute under the situation of multiport more and tackle.
In addition, need not constantly to carry out the required ADC of key identification, after interrupting generation, only carry out within a certain period of time, thereby can reduce power consumption.
Even, also can only be identified as the key assignments of identification at first normally and handle, thereby improve the stability of installing because of the key input more than 1 has taken place user's mistake simultaneously.
Useful embodiment of the present invention more than has been described, but the present invention can use multiple variation, change and equivalent.The present invention can suitably change the foregoing description and carry out identical application, and this is self-evident.Therefore, above-mentioned record content is not to be used to limit scope of the present invention, and scope of the present invention is limited by following claims.
Claims (5)
1, a kind of device that improves the key identification accuracy in requiring the terminal of a plurality of keys is characterized in that, comprises following several sections:
Main control unit has analog/digital conversion port and interruptive port, checks the analog/digital conversion value, the execute key mapping;
The keypad enable logic provides portion, provides the keypad enable logic to described main control unit;
Keypad has a plurality of keys;
Key input voltage level generating unit when behind described keypad input key assignments, generates the key input voltage level, passes to described main control unit by described analog/digital conversion port and interruptive port, and key assignments is correctly discerned.
2, the device that improves the key identification accuracy in requiring the terminal of a plurality of keys according to claim 1 is characterized in that described key input voltage level generating unit is made of following several sections:
Keypad value efferent after the key of described keypad is pressed, outputs to analog/digital conversion port in the described main control unit to the keypad value;
Analog/digital conversion reference voltage efferent is connected between the analog/digital conversion port in described keypad value efferent and the described main control unit, output analog/digital conversion reference voltage;
Interrupt the reference voltage efferent, be connected between described keypad and the described keypad value efferent, be connected in the interruptive port in the described main control unit, output interrupts using reference voltage.
3, according to a certain described device that in requiring the terminal of a plurality of keys, improves the key identification accuracy in claim 1 or the claim 2, it is characterized in that, described keypad enable logic provides portion to provide the keypad enable logic to described main control unit, the effect of keypad enable logic is, after keypad starts, keypad is converted to uses required pattern, carry out analog/digital conversion, if, then keep key input holding state through still there not being the key input behind the certain hour, if the key input is arranged, then check the analog/digital conversion value, the execute key mapping is after interrupting value changes, keep key input holding state, prevent key input interpretation mistake.
4, a kind of method that improves the key identification accuracy in requiring the terminal of a plurality of keys is characterized in that, comprises following several steps:
The 1st step after keypad starts, is converted to the required pattern of using to keypad, carries out analog/digital conversion;
The 2nd step after described the 1st step, if through still there not being the key input after the certain hour, then keeps key input holding state;
The 3rd step after described the 2nd step, if the key input is arranged, is then checked the analog/digital conversion value, and the execute key mapping after interrupting value changes, is returned described the 2nd step, prevents key input interpretation mistake.
5, the method that improves the key identification accuracy in requiring the terminal of a plurality of keys according to claim 4 is characterized in that described the 3rd step also comprises following several steps:
Whether after described the 2nd step, differentiating interrupting value is low step;
If described interrupting value is not low, then think the input of no key, carry out described the 2nd step, if described interrupting value is low, then regarded as the key input, carry out the step of analog/digital conversion;
After described analog/digital conversion is carried out, check the analog/digital conversion value, the execute key mapping steps;
Whether after having carried out the mapping of inspection of described analog/digital conversion value and key, differentiating interrupting value is high step;
If described interrupting value is not high, a key of then regarding as in the keypad is in down state, keeps holding state, if described interrupting value is high, then returns described the 2nd step, so that can import the step of new key assignments.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040101709A KR100687225B1 (en) | 2004-12-06 | 2004-12-06 | Apparatus and method for improving of key recognition accuracy in multi key demanded terminal |
| KR1020040101709 | 2004-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1786884A true CN1786884A (en) | 2006-06-14 |
Family
ID=36784370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100777637A Pending CN1786884A (en) | 2004-12-06 | 2005-06-24 | Apparatus for improving key identification accuracy in terminal of requiring multi-keys and method thereof |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100687225B1 (en) |
| CN (1) | CN1786884A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800557A (en) * | 2009-02-10 | 2010-08-11 | 阿尔派株式会社 | Key input device and key input identification method thereof |
| CN101493728B (en) * | 2008-01-24 | 2011-08-10 | 中兴通讯股份有限公司 | Line control push-button detecting and recognizing device and method capable of identifying combined key |
| CN103067547A (en) * | 2011-10-20 | 2013-04-24 | 联芯科技有限公司 | Mobile terminal input device and mobile terminal input method |
| CN107967112A (en) * | 2012-10-19 | 2018-04-27 | 谷歌有限责任公司 | Inaccurate gesture of the decoding for graphic keyboard |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592871A (en) * | 2013-05-20 | 2014-02-19 | 赛龙通信技术（深圳）有限公司 | Multitask timing control system and interruption response method thereof |
| CN103686010A (en) * | 2013-11-22 | 2014-03-26 | 乐视致新电子科技（天津）有限公司 | ADC port simulation multi-IO-port key input device, television-system and method |
| CN104714912B (en) * | 2015-03-04 | 2017-11-10 | 惠州Tcl移动通信有限公司 | A kind of more card detection apparatus, more card detecting systems and its method |
-
2004
- 2004-12-06 KR KR1020040101709A patent/KR100687225B1/en not_active IP Right Cessation
-
2005
- 2005-06-24 CN CNA2005100777637A patent/CN1786884A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493728B (en) * | 2008-01-24 | 2011-08-10 | 中兴通讯股份有限公司 | Line control push-button detecting and recognizing device and method capable of identifying combined key |
| CN101800557A (en) * | 2009-02-10 | 2010-08-11 | 阿尔派株式会社 | Key input device and key input identification method thereof |
| CN101800557B (en) * | 2009-02-10 | 2014-01-29 | 阿尔派株式会社 | Key input device and key input identification method thereof |
| CN103067547A (en) * | 2011-10-20 | 2013-04-24 | 联芯科技有限公司 | Mobile terminal input device and mobile terminal input method |
| CN107967112A (en) * | 2012-10-19 | 2018-04-27 | 谷歌有限责任公司 | Inaccurate gesture of the decoding for graphic keyboard |
| CN107967112B (en) * | 2012-10-19 | 2021-09-21 | 谷歌有限责任公司 | Decoding inaccurate gestures for graphical keyboards |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100687225B1 (en) | 2007-02-27 |
| KR20060062758A (en) | 2006-06-12 |
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