# US 12,008,966 B2 · Display device having a voltage generator with digital-analog converter for varying output power voltage > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,008,966 B2 - Document ID: US12008966B2 - Status: Granted - Kind: B2 - Application number: 18/099,451 - Filed: 2023-01-20 - Published: 2023-10-26 - Granted: 2024-06-11 - Earliest claimed: 2022-04-25 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Dae-Sik Lee; Siduk Sung; Songyi Han - Web page: https://patentgrep.com/patent/US12008966B2 ## 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} - G09G 3/3275: Details of drivers for data electrodes - G09G 3/3225: using an active matrix - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - 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 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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 display device includes a display panel which displays an image, and a control circuit board connected to the display panel. The control circuit board includes a controller which analyzes the image in real time and determines in real time a digital-type power voltage based on the image, and a voltage generator which generates an analog-type power voltage based on the digital-type power voltage received from the controller. The voltage generator includes a digital-analog converter which converts the digital-type power voltage into the analog-type power voltage and outputs the analog-type power voltage. ## Claims ### Claim 1 A display device, comprising: a display panel which displays an image; and a control circuit board connected to the display panel, wherein the control circuit board includes: a controller which analyzes the image in real time and determines in real time a digital-type power voltage based on the image; and a voltage generator which generates an analog-type power voltage based on the digital-type power voltage received from the controller, wherein the voltage generator includes a digital-analog converter which converts the digital-type power voltage into the analog-type power voltage and outputs the analog-type power voltage, and wherein the digital-analog converter includes: a voltage range setting part which sets a voltage range in which the analog-type power voltage is determined; and a conversion part which generates the analog-type power voltage within the voltage range, based on a digital signal of the digital-type power voltage. ### Claim 2 (depends on 1) The display device of claim 1, wherein the control circuit board further includes a voltage converter which generates an output power voltage based on the analog-type power voltage received from the voltage generator. ### Claim 3 (depends on 2) The display device of claim 2, wherein the control circuit board outputs the output power voltage varied in real time based on the image and applies the output power voltage to the display panel. ### Claim 4 (depends on 2) The display device of claim 2, wherein the voltage converter uses a voltage distribution manner to generate the output power voltage based on the analog-type power voltage. ### Claim 5 (depends on 1) The display device of claim 1, wherein the voltage range setting part determines a voltage variation of the analog-type power voltage within the voltage range to be varied in response to a variation in one step of gray scale for the image, wherein the voltage variation has a constant value. ### Claim 6 (depends on 1) The display device of claim 1, wherein the digital signal of the digital-type power voltage is varied in real time based on gray scale for the image, and the conversion part generates the analog-type power voltage which is varied in real time based on the digital signal of the digital-type power voltage which is varied in real time. ### Claim 7 (depends on 6) The display device of claim 6, wherein a magnitude of the gray scale for the image is in proportion to a magnitude of the analog-type power voltage which is output from the conversion part. ### Claim 8 (depends on 1) The display device of claim 1, wherein the controller determines the digital-type power voltage based on gray scale for the image. ### Claim 9 (depends on 8) The display device of claim 8, wherein a magnitude of the analog-type power voltage is in proportion to a magnitude of the gray scale. ### Claim 10 A display device, comprising: a display panel which displays an image varied in real time; and a control circuit board connected to the display panel, wherein the control circuit board includes: a controller which analyzes information of the image in real time and determines in real time a digital-type power voltage based on gray scale for the image; a voltage generator which generates an analog-type power voltage based on the digital-type power voltage received from the controller; and a voltage converter which generates an output power voltage based on the analog-type power voltage received from the voltage generator, wherein the voltage generator includes a digital-analog converter which converts a digital signal of the digital-type power voltage into the analog-type power voltage, and wherein the digital-analog converter includes: a voltage range setting part which sets a voltage range of the analog-type power voltage; and a conversion part which generates the analog-type power voltage to be within the voltage range in real time based on the digital signal of the digital-type power voltage. ### Claim 11 (depends on 10) The display device of claim 10, wherein the control circuit board further includes a voltage distribution circuit connected to the voltage converter, wherein the voltage distribution circuit receives the analog-type power voltage, calculates a distribution voltage for generating the output power voltage and transmits a calculated distribution voltage to the voltage converter. ### Claim 12 (depends on 11) The display device of claim 11, wherein the voltage converter generates the output power voltage varied in real time based on the analog-type power voltage and outputs the output power voltage to the display panel. ### Claim 13 (depends on 12) The display device of claim 12, wherein a magnitude of the output power voltage is inverse proportion to a magnitude of the analog-type power voltage. ### Claim 14 (depends on 10) The display device of claim 10, wherein a magnitude of the gray scale for the image is in proportion to a magnitude of the analog-type power voltage which is output from the conversion part. ### Claim 15 (depends on 10) The display device of claim 10, wherein a maximum voltage magnitude of the analog-type power voltage is determined as one selected from about 1.8 V, about 3.3 V, and about 4.8 V. ### Claim 16 (depends on 10) The display device of claim 10, wherein the voltage range setting part determines a voltage variation of the analog-type power voltage within the voltage range to be varied in response to a variation in one step of the gray scale for the image, wherein the voltage variation has a constant value. ### Claim 17 (depends on 10) The display device of claim 10, wherein the controller is connected to the voltage converter and controls a generation of the output power voltage. ### Claim 18 (depends on 10) The display device of claim 10, wherein a magnitude of the analog-type power voltage which is output from the digital-analog converter is in proportion to a magnitude of the gray scale for the image.