METHOD AND DEVICE FOR DETECTING IF A FINGER IS PRESENT AND SENSING A FINGERPRINT PATTERN
The present invention relates to a method of sensing a fingerprint pattern of a finger using a fingerprint sensing device comprising an array of sensing elements; an electrically conductive finger detecting structure; and finger detecting circuitry connected to the finger detecting structure for pro...
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| creator | RAMBERG, Fredrik LARSSON, Andreas RIEDIJK, Frank THÖRNBLOM, Hans HÄGGLUND, Robert |
| description | The present invention relates to a method of sensing a fingerprint pattern of a finger using a fingerprint sensing device comprising an array of sensing elements; an electrically conductive finger detecting structure; and finger detecting circuitry connected to the finger detecting structure for providing a finger detection signal indicative of a capacitive coupling between the finger detecting structure and the finger. The method comprises the steps of: comparing the finger detection signal with a first threshold value indicating a first capacitive coupling, and a second threshold value indicating a second capacitive coupling stronger than the first capacitive coupling; and activating at least a subset of the sensing elements when the finger detection signal changes from a first value indicating a capacitive coupling weaker than the first capacitive coupling to a second value indicating a capacitive coupling stronger than the second capacitive coupling. |
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The method comprises the steps of: comparing the finger detection signal with a first threshold value indicating a first capacitive coupling, and a second threshold value indicating a second capacitive coupling stronger than the first capacitive coupling; and activating at least a subset of the sensing elements when the finger detection signal changes from a first value indicating a capacitive coupling weaker than the first capacitive coupling to a second value indicating a capacitive coupling stronger than the second capacitive coupling.</description><language>eng ; fre ; ger</language><subject>CALCULATING ; COMPUTING ; COUNTING ; PHYSICS</subject><creationdate>2018</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20180808&DB=EPODOC&CC=EP&NR=3356997A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,309,781,886,25568,76551</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20180808&DB=EPODOC&CC=EP&NR=3356997A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>RAMBERG, Fredrik</creatorcontrib><creatorcontrib>LARSSON, Andreas</creatorcontrib><creatorcontrib>RIEDIJK, Frank</creatorcontrib><creatorcontrib>THÖRNBLOM, Hans</creatorcontrib><creatorcontrib>HÄGGLUND, Robert</creatorcontrib><title>METHOD AND DEVICE FOR DETECTING IF A FINGER IS PRESENT AND SENSING A FINGERPRINT PATTERN</title><description>The present invention relates to a method of sensing a fingerprint pattern of a finger using a fingerprint sensing device comprising an array of sensing elements; an electrically conductive finger detecting structure; and finger detecting circuitry connected to the finger detecting structure for providing a finger detection signal indicative of a capacitive coupling between the finger detecting structure and the finger. The method comprises the steps of: comparing the finger detection signal with a first threshold value indicating a first capacitive coupling, and a second threshold value indicating a second capacitive coupling stronger than the first capacitive coupling; and activating at least a subset of the sensing elements when the finger detection signal changes from a first value indicating a capacitive coupling weaker than the first capacitive coupling to a second value indicating a capacitive coupling stronger than the second capacitive coupling.</description><subject>CALCULATING</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2018</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNijEKAjEQANNYiPqH_YCFBJUrQ7LxtjAXNovYHYeslejB-X-Mor3VDMzMzfmI0nYBXAoQ8EQeIXZcVdALpQNQBAexGjJQgcxYMMnnr1Ley69nplqyE0FOSzO7DrdJV18uDEQU3651fPQ6jcNF7_rsMVu73TXN3m3sH8sLM00wVg</recordid><startdate>20180808</startdate><enddate>20180808</enddate><creator>RAMBERG, Fredrik</creator><creator>LARSSON, Andreas</creator><creator>RIEDIJK, Frank</creator><creator>THÖRNBLOM, Hans</creator><creator>HÄGGLUND, Robert</creator><scope>EVB</scope></search><sort><creationdate>20180808</creationdate><title>METHOD AND DEVICE FOR DETECTING IF A FINGER IS PRESENT AND SENSING A FINGERPRINT PATTERN</title><author>RAMBERG, Fredrik ; LARSSON, Andreas ; RIEDIJK, Frank ; THÖRNBLOM, Hans ; HÄGGLUND, Robert</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP3356997A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2018</creationdate><topic>CALCULATING</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>RAMBERG, Fredrik</creatorcontrib><creatorcontrib>LARSSON, Andreas</creatorcontrib><creatorcontrib>RIEDIJK, Frank</creatorcontrib><creatorcontrib>THÖRNBLOM, Hans</creatorcontrib><creatorcontrib>HÄGGLUND, Robert</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>RAMBERG, Fredrik</au><au>LARSSON, Andreas</au><au>RIEDIJK, Frank</au><au>THÖRNBLOM, Hans</au><au>HÄGGLUND, Robert</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD AND DEVICE FOR DETECTING IF A FINGER IS PRESENT AND SENSING A FINGERPRINT PATTERN</title><date>2018-08-08</date><risdate>2018</risdate><abstract>The present invention relates to a method of sensing a fingerprint pattern of a finger using a fingerprint sensing device comprising an array of sensing elements; an electrically conductive finger detecting structure; and finger detecting circuitry connected to the finger detecting structure for providing a finger detection signal indicative of a capacitive coupling between the finger detecting structure and the finger. The method comprises the steps of: comparing the finger detection signal with a first threshold value indicating a first capacitive coupling, and a second threshold value indicating a second capacitive coupling stronger than the first capacitive coupling; and activating at least a subset of the sensing elements when the finger detection signal changes from a first value indicating a capacitive coupling weaker than the first capacitive coupling to a second value indicating a capacitive coupling stronger than the second capacitive coupling.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CALCULATING COMPUTING COUNTING PHYSICS |
| title | METHOD AND DEVICE FOR DETECTING IF A FINGER IS PRESENT AND SENSING A FINGERPRINT PATTERN |
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