# US 12,217,677 B2 · Display device, method of driving display device, and electronic apparatus including display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,217,677 B2 - Document ID: US12217677B2 - Status: Granted - Kind: B2 - Application number: 18/230,668 - Filed: 2023-08-07 - Published: 2024-04-25 - Granted: 2025-02-04 - Earliest claimed: 2022-10-25 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Eunjin Choi; Geonhwi Park; Jang-Mi Lee; Kihyun Pyun - Web page: https://patentgrep.com/patent/US12217677B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - 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 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 3/36: using liquid crystals - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - G09G 2330/021: Power management, e.g. power saving - 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 displaying an image based on output image data, a voltage curve controller generating a converted peak luminance, a converted full white luminance, a converted peak grayscale, and a converted full white grayscale from a reference peak luminance and a reference full white luminance based on a gain mode and a gain value, and generating converted voltage curves including a first converted voltage curve from a first reference voltage curve based on the converted peak grayscale and the converted full white grayscale, and a driving voltage controller generating a driving voltage from the converted voltage curves based on a load and a maximum grayscale value of input image data. A voltage of the first converted voltage curve with respect to a peak grayscale is equal to a voltage of the first reference voltage curve with respect to the converted peak grayscale. ## Claims ### Claim 1 A display device, comprising: a display panel which displays an image based on output image data which is converted input image data; a voltage curve controller which generates a converted peak luminance, a converted full white luminance, a converted peak grayscale corresponding to the converted peak luminance, and a converted full white grayscale corresponding to the converted full white luminance from a reference peak luminance and a reference full white luminance based on a gain mode and a gain value, and generates converted voltage curves including a first converted voltage curve from a first reference voltage curve based on the converted peak grayscale and the converted full white grayscale, each of the converted voltage curves representing a voltage with respect to a grayscale; and a driving voltage controller which generates a driving voltage from the converted voltage curves based on a load of the input image data and a maximum grayscale value of the input image data, and provides the driving voltage to the display panel, wherein a voltage of the first converted voltage curve with respect to a peak grayscale is equal to a voltage of the first reference voltage curve with respect to the converted peak grayscale, and wherein the driving voltage controller selects one converted voltage curve among the converted voltage curves based on the load of the input image data which is a ratio of an average of grayscale values of the input image data to the maximum grayscale of the input image data. ### Claim 2 (depends on 1) The display device of claim 1, wherein a voltage of the first converted voltage curve with respect to a full white grayscale is equal to a voltage of the first reference voltage curve with respect to the converted full white grayscale. ### Claim 3 (depends on 2) The display device of claim 2, wherein a ratio of the full white grayscale to the converted full white grayscale is substantially equal to a ratio of the peak grayscale to the converted peak grayscale. ### Claim 4 (depends on 2) The display device of claim 2, wherein voltages of the first converted voltage curve with respect to grayscales between the full white grayscale and the peak grayscale are generated by interpolating the voltage of the first converted voltage curve with respect to the full white grayscale and the voltage of the first converted voltage curve with respect to the peak grayscale. ### Claim 5 (depends on 2) The display device of claim 2, wherein a voltage of the first converted voltage curve with respect to a black grayscale is equal to the voltage of the first converted voltage curve with respect to the peak grayscale. ### Claim 6 (depends on 5) The display device of claim 5, wherein voltages of the first converted voltage curve with respect to grayscales between the black grayscale and the full white grayscale are generated by interpolating the voltage of the first converted voltage curve with respect to the black grayscale and the voltage of the first converted voltage curve with respect to the full white grayscale. ### Claim 7 (depends on 5) The display device of claim 5, wherein the black grayscale and the peak grayscale are 0 grayscale and 255 grayscale, respectively. ### Claim 8 (depends on 1) The display device of claim 1, wherein the converted peak luminance is generated by multiplying the reference peak luminance by the gain value. ### Claim 9 (depends on 1) The display device of claim 1, wherein the converted full white luminance is equal to the reference full white luminance when the gain mode is a peak gain mode in which a luminance of the image decreases in a load range less than or equal to a predetermined load. ### Claim 10 (depends on 1) The display device of claim 1, wherein the converted full white luminance is generated by multiplying the reference full white luminance by the gain value when the gain mode is a dimming gain mode in which a luminance of the image decreases in an entire load range. ### Claim 11 (depends on 1) The display device of claim 1, wherein each of the first reference voltage curve and the first converted voltage curve represents a voltage with respect to a grayscale when the load of the input image data is a minimum load. ### Claim 12 (depends on 11) The display device of claim 11, wherein the converted voltage curves further include a second converted voltage curve representing a voltage with respect to a grayscale when the load of the input image data is a maximum load, and wherein the voltage curve controller generates the second converted voltage curve based on the first converted voltage curve. ### Claim 13 A method of driving a display device, the method comprising: generating a converted peak luminance, a converted full white luminance, a converted peak grayscale corresponding to the converted peak luminance, and a converted full white grayscale corresponding to the converted full white luminance from a reference peak luminance and a reference full white luminance based on a gain mode and a gain value; generating converted voltage curves including a first converted voltage curve from a first reference voltage curve based on the converted peak grayscale and the converted full white grayscale, each of the converted voltage curves representing a voltage with respect to a grayscale; and generating a driving voltage from the converted voltage curves based on a load of input image data and a maximum grayscale value of the input image data, wherein a voltage of the first converted voltage curve with respect to a peak grayscale is equal to a voltage of the first reference voltage curve with respect to the converted peak grayscale, and wherein generating the driving voltage comprises selecting one converted voltage curve among the converted voltage curves based on the load of input image data which is a ratio of an average of grayscale values of the input image data to the maximum grayscale value of the input image data. ### Claim 14 (depends on 13) The method of claim 13, wherein a voltage of the first converted voltage curve with respect to a full white grayscale is equal to a voltage of the first reference voltage curve with respect to the converted full white grayscale. ### Claim 15 (depends on 14) The method of claim 14, wherein a ratio of the full white grayscale to the converted full white grayscale is substantially equal to a ratio of the peak grayscale to the converted peak grayscale. ### Claim 16 (depends on 14) The method of claim 14, wherein voltages of the first converted voltage curve with respect to grayscales between the full white grayscale and the peak grayscale are generated by interpolating the voltage of the first converted voltage curve with respect to the full white grayscale and the voltage of the first converted voltage curve with respect to the peak grayscale. ### Claim 17 (depends on 14) The method of claim 14, wherein a voltage of the first converted voltage curve with respect to a black grayscale is equal to the voltage of the first converted voltage curve with respect to the peak grayscale. ### Claim 18 (depends on 17) The method of claim 17, wherein voltages of the first converted voltage curve with respect to grayscales between the black grayscale and the full white grayscale are generated by interpolating the voltage of the first converted voltage curve with respect to the black grayscale and the voltage of the first converted voltage curve with respect to the full white grayscale. ### Claim 19 An electronic apparatus, comprising: a display device which outputs visual information; and a processor which provides input image data to the display device, wherein the display device includes: a display panel which displays an image based on output image data which is converted input image data; a voltage curve controller which generates a converted peak luminance, a converted full white luminance, a converted peak grayscale corresponding to the converted peak luminance, and a converted full white grayscale corresponding to the converted full white luminance from a reference peak luminance and a reference full white luminance based on a gain mode and a gain value, and generates converted voltage curves including a first converted voltage curve from a first reference voltage curve based on the converted peak grayscale and the converted full white grayscale, each of the converted voltage curves representing a voltage with respect to a grayscale; and a driving voltage controller which generates a driving voltage from the converted voltage curves based on a load of the input image data and a maximum grayscale value of the input image data, and provides the driving voltage to the display panel, wherein a voltage of the first converted voltage curve with respect to a peak grayscale is equal to a voltage of the first reference voltage curve with respect to the converted peak grayscale, and wherein the driving voltage controller selects one converted voltage curve among the converted voltage curves based on the load of the input image data which is a ratio of an average of grayscale values of the input image data to the maximum grayscale of the input image data. ### Claim 20 (depends on 19) The electronic apparatus of claim 19, wherein a voltage of the first converted voltage curve with respect to a full white grayscale is equal to a voltage of the first reference voltage curve with respect to the converted full white grayscale.