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(54) Title: SPARSE-LAMP INFRARED MULTI-POINT TOUCHSCREEN AND IMPLEMENTATION METHOD THEREFOR

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(57) Abstract: Disclosed is a sparse-lamp infrared mul-ti-point touchscreen, characterized by being mainly com-posed of structures such as a power source (5), a touch-screen (I), a microprocessor unit (MCU) (6) connected tothe touchscreen (I) and a USB interface, an LDO circuitmodule (7), an infrared transmission unit (2), an infraredreceiving unit (3) and an amplification unit (4) which areconnected to the microprocessor unit (MPU) (6). Also dis-closed at the same time is an implementation method forthe sparse-lamp infrared multipoint touchscreen, character-ized by mainly comprising steps such as (I) forming an X-axis left optical scanning network and an X-axis right op-tical scanning network on a touchscreen, so as to acquire anapproximate touch point of a touch object. By means of thepresent invention, the accurate positions of two or moretouch points can be confirmed simultaneously, therebythoroughly overcoming the defect that multi-point touchpositions cannot be positioned in a traditional touch screen.

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INTERNATIONAL SEARCH REPORTInternational application No.

PCT/CN2014/076559

A. CLASSIFICATION OF SUBJECT MATTER

G06F 3/042 (2006.01) i

According to International Patent Classification (IPC) or to both national classification and IPC

B. FIELDS SEARCHED

Minimum documentation searched (classification system followed by classification symbols)

G06F 3/-

Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched

Electronic data base consulted during the international search (name of data base and, where practicable, search terms used)

CNABS, CNTXT, CNKI: infrared, touch, touch control, screen, send, receive, microprocessor, magnify, power supply, address

selection, location, space, adjacent, tube, external diameter, scan, quadrant, area, sector

EPODOC, WPI: infrared, touch, screen, send+, receiv+, MCU, magnif+, power, address, select+, location, spac+, adjacent, tube,

external diameter, scan+, quadrant, area, sector

C. DOCUMENTS CONSIDERED TO BE RELEVANT

Category" Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.

A

CN 102129328 A (HONGFUJIN PRECISION INDUSTRY (SHENZHEN) CO. , LTD. etal.), 20 July 2011 (20.07.2011), description, paragraphs 14-15

CN 2824143 Y (CHENGDU JIRUI TOUCH COMPUTER CO. , LTD.), 04 October 2006(04.10.2006), the whole document

Further documents are listed in the continuation of Box C. g See patent family annex.

Special categories of cited documents:

"A" document defining the general state of the art which is not

considered to be of particular relevance

"E" earlier application or patent but published on or after the

international filing date

"L" document which may throw doubts on priority claim(s) or

which is cited to establish the publication date of another

citation or other special reason (as specified)

"0" document referring to an oral disclosure, use, exhibition or

other means

"P" document published prior to the international filing date

but later than the priority date claimed

Date of the actual completion of the international search

21 January 2015 (21.01.2015)

Name and mailing address of the ISA/CN:State Intellectual Property Office of the P. R. ChinaNo. 6, Xitucheng Road, JimenqiaoHaidian District, Beijing 100088, China

Facsimile No. : (86-10) 62019451

Form PCT/ISA/210 (second sheet) (July 2009)

"T" later document published after the international filing dateor priority date and not in conflict with the application butcited to understand the principle or theory underlying theinvention

"X" document of particular relevance; the claimed inventioncannot be considered novel or cannot be considered to involve

an inventive step when the document is taken alone"Y" document of particular relevance; the claimed invention

cannot be considered to involve an inventive step when thedocument is combined with one or more other suchdocuments, such combination being obvious to a personskilled in the art

"&" document member of the same patent family

Date of mailing of the international search report

28 January 2015 (28.01.2015)

Authorized officer

XING, Peng

Telephone No. : (86-10) 62089927

INTERNATIONAL SEARCH REPORTInformation on patent family members

International application No.

PCT/CN2014/076559

Patent Documents referred

in the Report

CN 102129328 A

CN 2824143 Y

Publication Date

20 July 2011

04 October 2006

Patent Family

US 2011175850Al

None

Publication Date

21 July 2011

Form PCT/ISA/210 (patent family annex) (July 2009)

A. 48 II'~'4G06F 3/042(2006. 01) i

~ @Ye.k kkh W (J~ @Rm8

PCT/CN2014/076559

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