# US 12,183,264 B2 · Display apparatus and method of driving the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,264 B2 - Document ID: US12183264B2 - Status: Granted - Kind: B2 - Application number: 18/203,926 - Filed: 2023-05-31 - Published: 2023-10-12 - Granted: 2024-12-31 - Earliest claimed: 2021-05-04 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hyeonuk Won; Dohyun Kang; Jungkook Park; Donghak Pyo - Web page: https://patentgrep.com/patent/US12183264B2 ## CPC - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0443: with several sub-pixels for the same colour in a pixel, not specifically used to display gradations (G09G3/364 takes precedence) - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2310/0243: Details of the generation of driving signals - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2320/0257: Reduction of after-image effects - G09G 2320/0285: using tables for spatial correction of display data - G09G 2320/043: Preventing or counteracting the effects of ageing - G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - G09G 2354/00: Aspects of interface with display user - G09G 2358/00: Arrangements for display data security - 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 apparatus is disclosed. The display apparatus includes a display panel including first pixels and second pixels, and a display panel driver which drives the display panel. In a first mode, the display panel driver drives both the first pixels and the second pixels. In a second mode, the display panel driver drives the second pixels in a first part for one frame, and drives the first pixels in a second part for the one frame. ## Claims ### Claim 1 A display apparatus comprising: a display panel including first pixels and second pixels; and a display panel driver which drives the display panel, wherein, in a first mode, the display panel driver drives both the first pixels and the second pixels, wherein, in a second mode, the display panel driver drives the second pixels in a first part for one frame, and drives the first pixels in a second part for the one frame, wherein each of the second pixels includes a plurality of sub-pixels, and wherein a light blocking material is disposed in the plurality of sub-pixels. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein the first part for the one frame corresponds to N−1 pixel rows of N pixel rows, wherein N is an integer greater than 1, and wherein the second part for the one frame corresponds to a remaining pixel row of the N pixel rows. ### Claim 3 (depends on 1) The display apparatus of claim 1, wherein the first mode is a normal mode in which a user looking at the display apparatus from a side perceives a normal image, and wherein the second mode is a private mode in which the user looking at the display apparatus from the side does not perceive the normal image. ### Claim 4 (depends on 1) The display apparatus of claim 1, wherein the first pixels are normal pixels, and wherein the second pixels are private pixels. ### Claim 5 (depends on 4) The display apparatus of claim 4, wherein each of the private pixels includes the plurality of sub-pixels, wherein each of the plurality of sub-pixels includes a plurality of light emitting regions, and wherein the light blocking material is disposed between the plurality of light emitting regions of each of the plurality of sub-pixels. ### Claim 6 (depends on 1) The display apparatus of claim 1, wherein the display panel driver comprises: a gate driver which provides gate voltages to the display panel; a gamma reference voltage generator which generates a first gamma reference voltage, a second gamma reference voltage, a third gamma reference voltage, and a fourth gamma reference voltage; a data driver which provides data voltages to the first pixels based on the first gamma reference voltage in the first mode, provides the data voltages to the second pixels based on the second gamma reference voltage in the first mode, provides the data voltages to the first pixels based on the third gamma reference voltage in the second mode, and provides the data voltages to the second pixels based on the fourth gamma reference voltage in the second mode; and a driver controller which controls the gate driver, the gamma reference voltage generator, and the data driver. ### Claim 7 (depends on 6) The display apparatus of claim 6, wherein the gamma reference voltage generator comprises: a first gamma lookup table corresponding to the first gamma reference voltage for the first pixels in the first mode; a second gamma lookup table corresponding to the second gamma reference voltage for the second pixels in the first mode; a third gamma lookup table corresponding to the third gamma reference voltage for the first pixels in the second mode; and a fourth gamma lookup table corresponding to the fourth gamma reference voltage for the second pixels in the second mode. ### Claim 8 A display apparatus comprising: a display panel including first pixels and second pixels; and a display panel driver which drives the display panel, wherein, in a first mode, the display panel driver drives both the first pixels and the second pixels, wherein, in a second mode, the display panel driver drives the second pixels in a first time, and drives the first pixels in a second time after the first time, wherein each of the second pixels includes a plurality of sub-pixels, and wherein a light blocking material is disposed in the plurality of sub-pixels. ### Claim 9 (depends on 8) The display apparatus of claim 8, wherein the first time for driving the second pixels and the second time for driving the first pixels are repeated alternately with each other in the second mode. ### Claim 10 (depends on 9) The display apparatus of claim 9, wherein the second time is shorter than the first time. ### Claim 11 (depends on 10) The display apparatus of claim 10, wherein the second time is shorter than a time during which a user perceives an image displayed by the first pixels. ### Claim 12 (depends on 8) The display apparatus of claim 8, wherein the first pixels are normal pixels, and wherein the second pixels are private pixels. ### Claim 13 (depends on 12) The display apparatus of claim 12, wherein each of the private pixels includes the plurality of sub-pixels, wherein each of the plurality of sub-pixels includes a plurality of light emitting regions, and wherein the light blocking material is disposed between the plurality of light emitting regions of each of the plurality of sub-pixels. ### Claim 14 (depends on 8) The display apparatus of claim 8, wherein the display panel driver comprises: a gate driver which provides gate voltages to the display panel; a gamma reference voltage generator which generates a first gamma reference voltage, a second gamma reference voltage, a third gamma reference voltage, and a fourth gamma reference voltage; a data driver which provides data voltages to the first pixels based on the first gamma reference voltage in the first mode, provides the data voltages to the second pixels based on the second gamma reference voltage in the first mode, provides the data voltages to the first pixels based on the third gamma reference voltage in the second mode, and provides the data voltages to the second pixels based on the fourth gamma reference voltage in the second mode; and a driver controller which controls the gate driver, the gamma reference voltage generator, and the data driver. ### Claim 15 (depends on 14) The display apparatus of claim 14, wherein the gamma reference voltage generator comprises: a first gamma lookup table corresponding to the first gamma reference voltage for the first pixels in the first mode; a second gamma lookup table corresponding to the second gamma reference voltage for the second pixels in the first mode; a third gamma lookup table corresponding to the third gamma reference voltage for the first pixels in the second mode; and a fourth gamma lookup table corresponding to the fourth gamma reference voltage for the second pixels in the second mode. ### Claim 16 A method of driving a display apparatus, the method comprising: driving first pixels and second pixels of the display apparatus in a first mode; driving the second pixels in a first part of one frame; driving the first pixels in a second part of the one frame, wherein each of the second pixels includes a plurality of sub-pixels, and wherein a light blocking material is disposed in the plurality of sub-pixels. ### Claim 17 (depends on 16) The method of claim 16, wherein the first part of the one frame corresponds to N−1 pixel rows of N pixel rows, wherein N is an integer greater than 1, and wherein the second part of the one frame corresponds to a remaining pixel row of the N pixel rows. ### Claim 18 (depends on 16) The method of claim 16, wherein the first pixels are normal pixels, and wherein the second pixels are private pixels. ### Claim 19 (depends on 18) The method of claim 18, wherein each of the private pixels includes the plurality of sub-pixels, wherein each of the plurality of sub-pixels includes a plurality of light emitting regions, and wherein the light blocking material is disposed between the plurality of light emitting regions of each of the plurality of sub-pixels. ### Claim 20 (depends on 16) The method of claim 16, the method further comprising: setting a first gamma reference voltage for the first pixels using a first gamma lookup table in the first mode; setting a second gamma reference voltage for the second pixels using a second gamma lookup table in the first mode; setting a third gamma reference voltage for the first pixels using a third gamma lookup table in the second mode; and setting a fourth gamma reference voltage for the second pixels using a fourth gamma lookup table in the second mode.