# US 2021/0242579 A1 · Electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242579 A1 - Document ID: US20210242579A1 - Status: Published application - Kind: A1 - Application number: 17/144,380 - Filed: 2021-01-08 - Published: 2021-08-05 - Earliest claimed: 2020-02-05 - Assignees: Innolux Corporation - Applicants: InnoLux Corporation - Inventors: Tsung-Han TSAI - Web page: https://patentgrep.com/patent/US20210242579A1 ## CPC - H01Q 1/364: {using a particular conducting material, e.g. superconductor} - H01Q 1/526: {Electromagnetic shields} - H01Q 3/44: varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element - H01Q 9/0457: {electromagnetically coupled to the feed line} - H01Q 21/065: {Patch antenna array} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An electronic device includes a plurality of antenna units and a circuit. At least one of the antenna units includes a first electrode, a phase modulation electrode, and a liquid crystal layer located between the first electrode and the phase-shift electrode. The circuit provides a first AC signal directly to the phase modulation electrode, and it provides a second AC signal indirectly to the phase-shift electrode. ## Claims ### Claim 1 An electronic device, comprising: a plurality of antenna units, wherein at least one of the plurality of antenna units comprises a first electrode, a phase modulation electrode, and a liquid crystal layer located between the first electrode and the phase modulation electrode; and a circuit for providing a first AC signal directly to the phase modulation electrode and providing a second AC signal indirectly to the phase modulation electrode. ### Claim 2 (depends on 1) The electronic device as claimed in claim 1, wherein the circuit comprises a first circuit unit for providing the first AC signal and a second circuit unit for providing the second AC signal. ### Claim 3 (depends on 1) The electronic device as claimed in claim 1, wherein the second AC signal is provided to the phase modulation electrode indirectly by electromagnetic coupling. ### Claim 4 (depends on 1) The electronic device as claimed in claim 1, wherein a frequency of the first AC signal is less than a frequency of the second AC signal. ### Claim 5 (depends on 1) The electronic device as claimed in claim 1, wherein the first AC signal has a positive voltage part and a negative voltage part with respect to a voltage level of the first electrode. ### Claim 6 (depends on 5) The electronic device as claimed in claim 5, wherein the first AC signal is a periodic wave, and a time-amplitude integral of the positive voltage part in a duty cycle is 80% to 125% of a time-amplitude integral of the negative voltage part in the duty cycle. ### Claim 7 (depends on 1) The electronic device as claimed in claim 1, wherein the at least one of the plurality of antenna units further comprises a capacitor coupled to a wire that transmits the first AC signal to the phase modulation electrode. ### Claim 8 (depends on 1) The electronic device as claimed in claim 1, wherein the at least one of the plurality of antenna units further comprises a shielding structure disposed on a position where the second AC signal is fed to the phase modulation electrode. ### Claim 9 (depends on 1) The electronic device as claimed in claim 1, wherein the at least one of the plurality of antenna units further comprises: a spacer, wherein a height of the spacer is equal to a thickness of the liquid crystal layer; and another spacer, wherein a height of the another spacer is 50% to 95% of the thickness of the liquid crystal layer. ### Claim 10 (depends on 1) The electronic device as claimed in claim 1, wherein the at least one of the plurality of antenna units further comprises: a spacer, disposed on a metal pad, wherein a total height of the spacer and the metal pad is equal to a thickness of the liquid crystal layer. ### Claim 11 (depends on 1) The electronic device as claimed in claim 1, further comprising: a liquid crystal display panel, wherein the liquid crystal display panel and the plurality of antenna units share the liquid crystal layer. ### Claim 12 (depends on 11) The electronic device as claimed in claim 11, wherein the circuit comprises a first circuit for providing the first AC signal, and a second circuit for providing the second AC signal, wherein the first circuit is further for providing data signals to the liquid crystal display panel. ### Claim 13 (depends on 11) The electronic device as claimed in claim 11, wherein the second AC signal is provided to the phase modulation electrode indirectly by electromagnetic coupling. ### Claim 14 (depends on 11) The electronic device as claimed in claim 11, wherein a frequency of the first AC signal is less than a frequency of the second AC signal. ### Claim 15 (depends on 11) The electronic device as claimed in claim 11, wherein with respect to a voltage level of the first electrode, the first AC signal has a positive voltage part and a negative voltage part. ### Claim 16 (depends on 15) The electronic device as claimed in claim 15, wherein the first AC signal is a periodic wave, and a time-amplitude integral of the positive voltage part in a duty cycle is 80% to 125% of a time-amplitude integral of the negative voltage part in the duty cycle. ### Claim 17 (depends on 11) The electronic device as claimed in claim 11, wherein the at least one of the plurality of antenna units further comprises a capacitor coupled to a wire that transmits the first AC signal to the phase modulation electrode. ### Claim 18 (depends on 11) The electronic device as claimed in claim 11, wherein the at least one of the plurality of antenna units further comprises a shielding structure disposed above a position where the second AC signal is fed to the phase modulation electrode. ### Claim 19 (depends on 11) The electronic device as claimed in claim 11, wherein the at least one of the plurality of antenna units further comprises: a spacer, wherein a height of the spacer is equal to a thickness of the liquid crystal layer; and another spacer, wherein a height of the another spacer is 50% to 95% of the thickness of the liquid crystal layer. ### Claim 20 (depends on 11) The electronic device as claimed in claim 11, wherein the at least one of the plurality of antenna units further comprises: a spacer, disposed on a metal pad, wherein a total height of the spacer and the metal pad is equal to a thickness of the liquid crystal layer.