# US 2019/0377441 A1 · Redundant resistive touch panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0377441 A1 - Document ID: US20190377441A1 - Status: Published application - Kind: A1 - Application number: 16/547,657 - Filed: 2019-08-22 - Published: 2019-12-12 - Earliest claimed: 2015-10-06 - Assignees: American Panel Corporation - Applicants: American Panel Corporation - Inventors: Ken Mahdi - Web page: https://patentgrep.com/patent/US20190377441A1 ## CPC - G06F 3/045: using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact - G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)} - G06F 3/0444: {using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners} - G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A resistive touch panel assembly is disclosed. An optical stack located within a housing includes an electronic display layer adapted to display an image and a resistive touch panel. The touch panel includes a number of touch input receivers placed adjacent to a first and second independently operable, grid sections which are located adjacent to one another in a seamless fashion. A number of input/output devices are in communication with the optical stack and extend through a channel comprising shielding. ## Claims ### Claim 1 A touch panel assembly comprising: a housing; an optical stack located within said housing and comprising: an electronic display layer adapted to display an image; a resistive touch panel comprising a number of touch input receivers placed adjacent to a first and second independently operable, seamless grid section, wherein said first and second grid sections are located adjacent to one another in a seamless fashion; a number of input/output devices in communication with said optical stack; and a shielded channel extending from within said housing to an area outside of said housing, wherein said input/output devices extend through said channel. ### Claim 2 (depends on 1) The assembly of claim 1 wherein: said touch panel comprises a matrix of electronic circuits; and each of the electronic circuits in the matrix comprises: a first terminal; a second terminal; a third terminal comprising a common; a number of zener diodes, each coupled between said first terminal and said third terminal; a number of capacitors, each coupled between said first terminal and said third terminal, wherein each of said capacitors is coupled in parallel with each of said zener diodes; a first inductor coupled in series between said first terminal and said second terminal; a second inductor coupled in series between said first terminal and said second terminal, wherein said second inductor is coupled in series with said first inductor; and a second capacitor coupled between said first terminal and said third terminal, wherein said second capacitor is coupled in series with only said first and second inductors. ### Claim 3 (depends on 1) The assembly of claim 1 wherein: the electronic display layer comprises liquid crystals. ### Claim 4 (depends on 1) The assembly of claim 1 further comprising: a controller comprising executable software instructions, which when executed, configure the controller to: display the image across substantially the entirety of the electronic display layer; monitor for failure of one of said grid sections; and upon failure of one of said first and second grid sections, display the image on only a portion of the electronic display layer corresponding with the operable grid section. ### Claim 5 (depends on 1) The assembly of claim 1 further comprising: a controller comprising executable software instructions, which when executed, configure the controller to: monitor for failure of one of said input/output devices; and upon failure of one of said input/output devices, automatically change the input/output device utilized. ### Claim 6 (depends on 1) The assembly of claim 1 wherein: said number of input/output devices comprise four input/output devices, wherein at least two of said input/output devices are in electrical connection with said first grid section and at least two others of said input/output devices are in electrical connection with said second grid section. ### Claim 7 (depends on 6) The assembly of claim 6 further comprising: a controller comprising executable software instructions, which when executed, configure the controller to: monitor for failure of one of said input/output devices; and upon failure of one of said input/output devices, automatically change the input/output device utilized. ### Claim 8 (depends on 1) The assembly of claim 1 wherein: the optical stack further comprises a cover glass located above a linear polarizer located above a quarter wave retarder located above a top glass located above an optically clear adhesive located above a bottom glass located above an indium tin oxide layer located above a quarter wave retarder. ### Claim 9 (depends on 8) The assembly of claim 8 wherein: said housing and said cover glass are configured to provide a substantially watertight engagement. ### Claim 10 (depends on 1) The assembly of claim 1 wherein: said electronic display layer is wet laminated to said touch panel. ### Claim 11 (depends on 1) The assembly of claim 1 further comprising: a heating device. ### Claim 12 (depends on 1) The assembly of claim 1 wherein: said touch panel is configured to register touch at an activation pressure of between 0.05N and 0.8N. ### Claim 13 (depends on 1) The assembly of claim 1 wherein: said touch panel is configured to register multiple simultaneous touches. ### Claim 14 (depends on 1) The assembly of claim of claim 1 wherein: each of said grid sections comprise a matrix of electrical circuits; and each of the electrical circuits in the matrix comprises a pair of zener diodes located in parallel with, and on either side of, a number of capacitors, and an inductor placed in series between each capacitor. ### Claim 15 (depends on 14) The assembly of claim 14 wherein: said number of capacitors comprises three capacitors ### Claim 16 A touch panel assembly comprising: a housing; an optical stack located within said housing and comprising: a cover glass; a linear polarizer located below the cover glass; a quarter wave retarder located below the linear polarizer; a top glass located below the quarter wave retarder; an electronic display layer adapted to display an image; a resistive touch panel comprising a number of touch input receivers placed adjacent to a first and second independently operable, seamless grid section, wherein said first and second grid sections are located adjacent to one another in a seamless fashion; a bottom glass located below the resistive touch panel; an indium tin oxide layer located below the bottom glass; and a quarter wave retarder located below the indium tin oxide layer; a controller comprising executable software instructions, which when executed, configure the controller to: display the image across substantially the entirety of the electronic display layer; monitor for failure of one of said grid sections; and upon failure of one of said first and second grid sections, display the image on only a portion of the electronic display corresponding with the operable grid section. ### Claim 17 (depends on 16) The assembly of claim 16 further comprising: a number of input/output devices in communication with said electronic display and said touch panel; and a channel comprising shielding and extending from within said housing to an area outside of said housing, wherein said input/output devices extend through said channel. ### Claim 18 (depends on 17) The assembly of claim 17 wherein: each of the grid sections comprise a matrix of electrical circuits; and each of the electrical circuits in the matrix comprises a pair of zener diodes located in parallel with, and on either side of, a number of capacitors, and an inductor placed in series between each capacitor. ### Claim 19 A touch panel assembly comprising: a housing; an optical stack located within said housing and comprising: a cover glass; a linear polarizer located below the cover glass; a quarter wave retarder located below the linear polarizer; a top glass located below the quarter wave retarder; a liquid crystal layer adapted to display an image; a resistive touch panel comprising a series of touch input receivers placed adjacent to a first and second independently operable, seamless grid section, wherein said first and second grid sections are located adjacent to one another in a seamless fashion; a bottom glass located below the resistive touch panel; an indium tin oxide layer located below the bottom glass; and a quarter wave retarder located below the indium tin oxide layer; wherein each of the grid sections comprise a matrix of electrical circuits; wherein each of the electrical circuits in the matrix comprises: a number of capacitors a pair of zener diodes located in parallel with, and on either side of, said number of capacitors; and an inductor placed in series between each capacitor. ### Claim 20 (depends on 19) The assembly of claim 19 further comprising: a controller comprising executable software instructions, which when executed, configure the controller to: display the image across substantially the entirety of the electronic display layer; monitor for failure of one of said grid sections; and upon failure of one of said first and second grid sections, display the image on only a portion of the electronic display layer corresponding with the operable grid section.