# US 12,002,417 B2 · Data driver and LED device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,002,417 B2 - Document ID: US12002417B2 - Status: Granted - Kind: B2 - Application number: 18/198,136 - Filed: 2023-05-16 - Published: 2023-11-30 - Granted: 2024-06-04 - Earliest claimed: 2022-05-25 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Ji Hun Kim; Joon Min Park - Web page: https://patentgrep.com/patent/US12002417B2 ## CPC - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 3/3275: Details of drivers for data electrodes - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - 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: 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) ## Abstract A data driver can include a white data voltage output circuit having an Ath channel for outputting a first white data voltage and a Bth channel for outputting a second white data voltage different from the first white data voltage. The data driver can further include red, green, and blue data voltage output circuits configured to output a red data voltage, a green data voltage, and a blue data voltage, respectively. One of the Ath channel and the Bth channel can operate in a first driving condition, and the Ath channel and the Bth channel can operate together in a second driving condition. ## Claims ### Claim 1 A data driver comprising: a white data voltage output circuit having an Ath channel for outputting a first white data voltage and a Bth channel for outputting a second white data voltage different from the first white data voltage; and red, green, and blue data voltage output circuits for outputting a red data voltage, a green data voltage, and a blue data voltage, respectively, wherein one of the Ath channel and the Bth channel operates in a first driving condition, and the Ath channel and the Bth channel operate together in a second driving condition. ### Claim 2 (depends on 1) The data driver according to claim 1, wherein: the first driving condition is operating at a first frequency; and the second driving condition is operating at a second frequency higher than the first frequency. ### Claim 3 (depends on 1) The data driver according to claim 1, wherein the white data voltage output circuit comprises: a first-A latch configured to sample a first white data signal, and a first-B latch configured to sample a second white data signal; a second-A latch configured to hold the first white data signal output from the first-A latch, and a second-B latch configured to hold the second white data signal output from the first-B latch; an Ath converter configured to convert the first white data signal output from the second-A latch into the first white data voltage, and a Bth converter configured to convert the second white data signal output from the second-B latch into the second white data voltage; an Ath amplifier configured to amplify the first white data voltage output from the Ath converter, and a Bth amplifier configured to amplify the second white data voltage output from the Bth converter; and an Ath switch configured to output the first white data voltage output from the Ath amplifier through an output terminal, and a Bth switch configured to output the second white data voltage output from the Bth amplifier through an output terminal. ### Claim 4 (depends on 3) The data driver according to claim 3, wherein one of the Ath switch and the Bth switch is turned on under the first driving condition, and the Ath switch and the Bth switch are both turned on under the second driving condition. ### Claim 5 (depends on 1) The data driver according to claim 1, wherein the white data voltage output circuit comprises: a first-A latch configured to sample a first white data signal, and a first-B latch configured to sample a second white data signal; a second-A latch configured to hold the first white data signal output from the first-A latch, and a second-B latch configured to hold the second white data signal output from the first-B latch; an Ath switch configured to transfer the first white data signal output from the second-A latch to a converter, and a Bth switch configured to transfer the second white data signal output from the second-B latch to the converter; the converter configured to convert the first white data signal transferred from the Ath switch into the first white data voltage or convert the second white data signal transferred from the Bth switch into the second white data voltage; an amplifier configured to amplify the first white data voltage or the second white data voltage output from the converter; and a switch configured to output the first white data voltage or the second white data voltage output from the amplifier through an output terminal. ### Claim 6 (depends on 5) The data driver according to claim 5, wherein one of the Ath switch and the Bth switch is turned on under the first driving condition, and the Ath switch and the Bth switch are both turned on under the second driving condition. ### Claim 7 A light-emitting display (LED) device comprising: a display panel configured to display an image; and a data driver connected to data lines of the display panel, wherein the data driver comprises: a white data voltage output circuit having an Ath channel for outputting a first white data voltage and a Bth channel for outputting a second white data voltage different from the first white data voltage; and red, green, and blue data voltage output circuits configured to output a red data voltage, a green data voltage, and a blue data voltage, respectively, and wherein one of the Ath channel and the Bth channel operates in a first driving condition, and the Ath channel and the Bth channel operate together in a second driving condition. ### Claim 8 (depends on 7) The LED device according to claim 7, wherein: the first driving condition is operating at a first frequency; and the second driving condition is operating at a second frequency higher than the first frequency. ### Claim 9 (depends on 7) The LED device according to claim 7, wherein the white data voltage output circuit comprises: a first-A latch configured to sample a first white data signal, and a first-B latch configured to sample a second white data signal; a second-A latch configured to hold the first white data signal output from the first-A latch, and a second-B latch configured to hold the second white data signal output from the first-B latch; an Ath converter configured to convert the first white data signal output from the second-A latch into the first white data voltage, and a Bth converter configured to convert the second white data signal output from the second-B latch into the second white data voltage; an Ath amplifier configured to amplify the first white data voltage output from the Ath converter, and a Bth amplifier configured to amplify the second white data voltage output from the Bth converter; and an Ath switch configured to output the first white data voltage output from the Ath amplifier through an output terminal, and a Bth switch configured to output the second white data voltage output from the Bth amplifier through an output terminal. ### Claim 10 (depends on 9) The LED device according to claim 9, wherein one of the Ath switch and the Bth switch is turned on under the first driving condition, and the Ath switch and the Bth switch are both turned on under the second driving condition. ### Claim 11 (depends on 7) The LED device according to claim 7, wherein the white data voltage output circuit comprises: a first-A latch configured to sample a first white data signal, and a first-B latch configured to sample a second white data signal; a second-A latch configured to hold the first white data signal output from the first-A latch, and a second-B latch configured to hold the second white data signal output from the first-B latch; an Ath switch configured to transfer the first white data signal output from the second-A latch to a converter, and a Bth switch configured to transfer the second white data signal output from the second-B latch to the converter; the converter configured to convert the first white data signal transferred from the Ath switch into the first white data voltage or convert the second white data signal transferred from the Bth switch into the second white data voltage; an amplifier configured to amplify the first white data voltage or the second white data voltage output from the converter; and a switch configured to output the first white data voltage or the second white data voltage output from the amplifier through an output terminal. ### Claim 12 (depends on 11) The LED device according to claim 11, wherein one of the Ath switch and the Bth switch is turned on under the first driving condition, and the Ath switch and the Bth switch are both turned on under the second driving condition. ### Claim 13 (depends on 7) The LED device according to claim 7, wherein the data driver outputs the red data voltage, the green data voltage, and the blue data voltage together with one selected from the first white data voltage and the second white data voltage when operating under the first driving condition. ### Claim 14 (depends on 7) The LED device according to claim 7, wherein the data driver outputs the first white data voltage, the second white data voltage, the red data voltage, the green data voltage, and the blue data voltage when operating under the second driving condition. ### Claim 15 (depends on 14) The LED device according to claim 14, wherein the data driver alternately controls the Ath channel and the Bth channel when operating under the second driving condition. ### Claim 16 (depends on 14) The LED device according to claim 14, wherein the display panel separately stores the first white data voltage and the second white data voltage one line at a time, and continuously stores the red data voltage, the greed data voltage, and the blue data voltage two lines at a time when operating under the second driving condition.