# US 11,443,667 B2 · Display apparatus and data driving integrated circuit thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,443,667 B2 - Document ID: US11443667B2 - Status: Granted - Kind: B2 - Application number: 16/419,018 - Filed: 2019-05-22 - Published: 2019-11-28 - Granted: 2022-09-13 - Earliest claimed: 2018-05-22 - Assignees: Novatek Microelectronics Corp. - Applicants: Novatek Microelectronics Corp. - Inventors: Chang-Pao Chang; Wei-Da Guo; Yueh-Hsun Tsai - Web page: https://patentgrep.com/patent/US11443667B2 ## CPC - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - H10D 89/931: {characterised by the dispositions of the protective arrangements} - H10W 42/60: protecting against electrostatic charges or discharges, e.g. Faraday shields (integrated devices comprising arrangements for electrical protection H10D89/60) - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 2300/0426: Layout of electrodes and connections - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - G09G 2310/0275: Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current - G09G 2320/0204: Compensation of DC component across the pixels in flat panels - G09G 2330/021: Power management, e.g. power saving - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - G09G 2330/04: Display protection - G09G 2330/06: Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation - H05K 1/0259: {Electrostatic discharge [ESD] protection} - H10D 89/60: Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD] - H10D 89/611: {using diodes as protective elements} - H10D 89/921: {characterised by the configuration of the interconnections connecting the protective arrangements, e.g. ESD buses} - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract The disclosure provides a display apparatus and a data driving integrated circuit thereof for removing the interference patterns caused by radio wave interference. In the disclosure, a data driving integrated circuit includes a gamma voltage generating circuit, power terminals for receiving power voltages of the gamma voltage generating circuit. The data driving integrated circuit couples dummy terminals to the power terminals, so as to decrease the equivalent impedance of the power terminals through a parallel connection between the I/O ESD protection circuits. Therefore, the DC offset of the power voltages caused by the radio wave interference may be decreased. ## Claims ### Claim 1 A data driving integrated circuit, comprising: a gamma voltage generating circuit, configured to receive a first voltage and a second voltage, wherein the first voltage and the second voltage are in a gamma voltage range, or are as the largest and the smallest gamma voltages of the gamma voltage range; a first power terminal, configured to receive the first voltage as a first gamma reference voltage; a first ESD protection circuit associated with the first power terminal, wherein the first ESD protection circuit is disposed in a path connecting between the first power terminal and the gamma voltage generating circuit; a second power terminal, configured to receive the second voltage as a second gamma reference voltage; a first dummy terminal, configured to receive a third gamma reference voltage other than the first voltage and the second voltage, wherein a DC offset included in the first gamma reference voltage received by the first power terminal is reduced by turning on a first switch disposed between the first dummy terminal and the first power terminal to directly connect the first dummy terminal with the first power terminal; and second ESD protection circuit associated with the first dummy terminal; wherein the first ESD protection circuit and the second ESD protection circuit are coupled in parallel. ### Claim 2 (depends on 1) The data driving integrated circuit of claim 1, wherein the first power terminal, the second power terminal and the first dummy terminal are input/output pins on the data driving integrated circuit and configured to connect to and communicate with an external circuit. ### Claim 3 (depends on 1) The data driving integrated circuit of claim 1, further comprising: a second dummy terminal, coupled to the second power terminal; a third ESD protection circuit associated with the second power terminal; and a fourth ESD protection circuit associated with the second dummy terminal, wherein the third ESD protection circuit and the fourth ESD protection circuit are coupled in parallel. ### Claim 4 (depends on 1) The data driving integrated circuit of claim 1, wherein the gamma voltage generation circuit comprises one or more voltage dividing circuits for generating a plurality of gamma voltages based on the first voltage and the second voltage. ### Claim 5 (depends on 3) The data driving integrated circuit of claim 3, further comprising: a second switch, coupled between the second power terminal and the second dummy terminal. ### Claim 6 (depends on 5) The data driving integrated circuit of claim 5, further comprising: a controller, configured to turn on or off the first switch connecting the first power terminal with the first dummy terminal, and configured to turn on or off the second switch connecting the second power terminal with the second dummy terminal. ### Claim 7 (depends on 5) The data driving integrated circuit of claim 5, further comprising a control terminal, receiving a control signal from an external controller, wherein the control signal is configured to turn on or off the first and second switches. ### Claim 8 A display apparatus, comprising: a display panel, comprising a plurality of pixels, wherein each pixel is driven according to a data voltage; a data driving integrated circuit, disposed on a substrate which is a part of the display panel, for providing data voltages to drive the pixels, and the data driving integrated circuit comprising: a gamma voltage generating circuit, configured to receive a first voltage and a second voltage, wherein the first voltage and the second voltage are in a gamma voltage range, or are as the largest and the smallest gamma voltages of the gamma voltage range; a first power terminal, configured to receive the first voltage as a first gamma reference voltage; a first ESD protection circuit associated with the first power terminal, wherein the first ESD protection circuit is disposed in a path connecting between the first power terminal and the gamma voltage generating circuit; a second power terminal, configured to receive the second voltage as a second gamma reference voltage; a first dummy terminal, configured to receive a third gamma reference voltage other than the first voltage and the second voltage, wherein a DC offset included in the first gamma reference voltage received by the first power terminal is reduced by turning on a first switch disposed between the first dummy terminal and the first power terminal to directly connect the first dummy terminal with the first power terminal; and a second ESD protection circuit associated with the first dummy terminal; wherein the first ESD protection circuit and the second ESD protection circuit are coupled in parallel, a power supplying circuit, disposed on a mainboard, and configured to generate the first voltage and the second voltage; and a connecting device connecting the mainboard and the data driving integrated circuit, wherein the first voltage and the second voltage are transmitted to the data driving integrated circuit through the connecting device. ### Claim 9 (depends on 8) The display apparatus of claim 8, wherein the data driving integrated circuit further comprising: a second dummy terminal, coupled to the second power terminal; a third ESD protection circuit associated with the second power terminal; and a fourth ESD protection circuit associated with the second dummy terminal, wherein the third ESD protection circuit and the fourth ESD protection circuit are coupled in parallel. ### Claim 10 (depends on 8) The display apparatus of claim 8, wherein the gamma voltage generation circuit comprises one or more voltage dividing circuits for generating a plurality of gamma voltages based on the first voltage and the second voltage. ### Claim 11 (depends on 9) The display apparatus of claim 9, wherein the data driving integrated circuit further comprising: a second switch, coupled between the second power terminal and the second dummy terminal. ### Claim 12 (depends on 11) The display apparatus of claim 11, wherein the data driving integrated circuit further comprising: a controller, configured to turn on or off the first switch connecting the first power terminal with the first dummy terminal, and configured to turn on or off the second switch connecting the second power terminal with the second dummy terminal. ### Claim 13 (depends on 11) The display apparatus of claim 11, further comprising: a controller, coupled to the gamma voltage generating circuit, and configured to generate a control signal, wherein the gamma voltage generating circuit, further comprises a control terminal, receiving the control signal from the controller, wherein the control signal is configured to turn on or off the first and second switches.