Title:
PEEP PROOF DISORDER CIPHER INPUT DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/105704
Kind Code:
A1
Abstract:
The present invention relates to a peep proof disorder cipher input device which is characterized that the key (1) on the keyboard is constituted of transparent body or convex lens (b) and the non-transparent outboard (a) fixed together. Bottom of the non-transparent outboard is spring contacted with the micro switch or the thin film switch (3) which is positioned corresponding to the key leg on the switchboard (2) of the bottom. A character display carrier (5) mounted on the mainboard is under the opening pore of the switchboard which corresponding to the transparent body or convex lens. A cipher input circuit is formed by connecting the output of the micro switch or the thin film switch (3) composing the key matrix and the input of CPU on the mainboard. It can prevent the cipher input from being peeping or filching due to this structure. The present invention adopts a method of arranging the key assignment 0 - 9 character bit randomly with the order variable to make the peep proof disorder cipher input device.
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Inventors:
HAN GUOZHONG (CN)
SHEN SHINGUANG (CN)
TANG APING (CN)
SHEN SHINGUANG (CN)
TANG APING (CN)
Application Number:
PCT/CN2005/001807
Publication Date:
October 12, 2006
Filing Date:
October 31, 2005
Export Citation:
Assignee:
CHONGQING BANK TECHNOLOGY DEV (CN)
HAN GUOZHONG (CN)
HAN GUOZHONG (CN)
International Classes:
G06F3/023
Foreign References:
| CN1558377A | 2004-12-29 | |||
| CN2600861Y | 2004-01-21 | |||
| JP2002032176A | 2002-01-31 | |||
| CN1416038A | 2003-05-07 |
Attorney, Agent or Firm:
CHONGQING HENGXIN PATENT AGENT CO., LTD (Yubei District, Chongqing 7, CN)
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