Composite function keyboard circuit
A composite function keyboard circuit includes a first matrix circuit, a first bias resistor group, a second matrix circuit, a second bias resistor group and a controller. Each switch unit in the first matrix circuit is an ink-type force sensing switch. A resistance of the ink-type force sensing swi...
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| creator | CHEN, YI-LIANG CHANG, CHIHN LI, CHIEN-MING |
| description | A composite function keyboard circuit includes a first matrix circuit, a first bias resistor group, a second matrix circuit, a second bias resistor group and a controller. Each switch unit in the first matrix circuit is an ink-type force sensing switch. A resistance of the ink-type force sensing switch is variable according to a pressing mode of a keypress action. An electrical connection path is formed between the ink-type force sensing switch and the corresponding bias resistor of the second bias resistor group. When the ink-type force sensing switch is electrically conducted, a divided sensing voltage is generated by the electrical connection path, and the controller generates a corresponding key control instruction according to a level of the divided sensing voltage. Furthermore, the cooperation of the first matrix circuit and the first bias resistor group can achieve a ghost key preventing function. |
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Each switch unit in the first matrix circuit is an ink-type force sensing switch. A resistance of the ink-type force sensing switch is variable according to a pressing mode of a keypress action. An electrical connection path is formed between the ink-type force sensing switch and the corresponding bias resistor of the second bias resistor group. When the ink-type force sensing switch is electrically conducted, a divided sensing voltage is generated by the electrical connection path, and the controller generates a corresponding key control instruction according to a level of the divided sensing voltage. 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Furthermore, the cooperation of the first matrix circuit and the first bias resistor group can achieve a ghost key preventing function.</description><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CALCULATING</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>ELECTRIC DIGITAL DATA PROCESSING</subject><subject>ELECTRIC SWITCHES</subject><subject>ELECTRICITY</subject><subject>EMERGENCY PROTECTIVE DEVICES</subject><subject>PHYSICS</subject><subject>RELAYS</subject><subject>SELECTORS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2024</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFB2zs8tyC_OLElVSCvNSy7JzM9TyE6tTMpPLEpRSM4sSi7NLOFhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfEh4Z4WJobGBiZOTsZEKAEAyzwm2Q</recordid><startdate>20240501</startdate><enddate>20240501</enddate><creator>CHEN, YI-LIANG</creator><creator>CHANG, CHIHN</creator><creator>LI, CHIEN-MING</creator><scope>EVB</scope></search><sort><creationdate>20240501</creationdate><title>Composite function keyboard circuit</title><author>CHEN, YI-LIANG ; CHANG, CHIHN ; LI, CHIEN-MING</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_TWI841304BB3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>chi ; eng</language><creationdate>2024</creationdate><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CALCULATING</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>ELECTRIC DIGITAL DATA PROCESSING</topic><topic>ELECTRIC SWITCHES</topic><topic>ELECTRICITY</topic><topic>EMERGENCY PROTECTIVE DEVICES</topic><topic>PHYSICS</topic><topic>RELAYS</topic><topic>SELECTORS</topic><toplevel>online_resources</toplevel><creatorcontrib>CHEN, YI-LIANG</creatorcontrib><creatorcontrib>CHANG, CHIHN</creatorcontrib><creatorcontrib>LI, CHIEN-MING</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>CHEN, YI-LIANG</au><au>CHANG, CHIHN</au><au>LI, CHIEN-MING</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Composite function keyboard circuit</title><date>2024-05-01</date><risdate>2024</risdate><abstract>A composite function keyboard circuit includes a first matrix circuit, a first bias resistor group, a second matrix circuit, a second bias resistor group and a controller. Each switch unit in the first matrix circuit is an ink-type force sensing switch. A resistance of the ink-type force sensing switch is variable according to a pressing mode of a keypress action. An electrical connection path is formed between the ink-type force sensing switch and the corresponding bias resistor of the second bias resistor group. When the ink-type force sensing switch is electrically conducted, a divided sensing voltage is generated by the electrical connection path, and the controller generates a corresponding key control instruction according to a level of the divided sensing voltage. Furthermore, the cooperation of the first matrix circuit and the first bias resistor group can achieve a ghost key preventing function.</abstract><oa>free_for_read</oa></addata></record> |
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| language | chi ; eng |
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| subjects | BASIC ELECTRIC ELEMENTS CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES PHYSICS RELAYS SELECTORS |
| title | Composite function keyboard circuit |
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