# US 2023/0274686 A1 · Current sensor and display 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 2023/0274686 A1 - Document ID: US20230274686A1 - Status: Published application - Kind: A1 - Application number: 18/079,607 - Filed: 2022-12-12 - Published: 2023-08-31 - Earliest claimed: 2022-02-28 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: KIHYUN PYUN; JANG-MI LEE - Web page: https://patentgrep.com/patent/US20230274686A1 ## CPC - G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 3/2096: {Details of the interface to the display terminal specific for a flat panel (suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167)} - G01R 19/16571: {comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current (G01R19/16514, G01R19/16519, G01R19/16528, G01R19/16533, G01R19/1659 take precedence; measuring currents by using elements sensitive to the magnetic field generated G01R15/14; measuring earth resistance G01R27/18; testing for leakage or short circuits in electrical apparatus G01R31/52)} - 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 3/2007: {Display of intermediate tones} - G01R 19/0092: {Measuring current only} - G09G 2300/0828: forming a digital to analog [D/A] conversion circuit - 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: 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) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract A display device may include a display panel which displays an image based on image data, a power supply which provides a driving voltage to the display panel through a power line, a current sensor which generates first current data including average, minimum, and maximum sensing currents of a first period based on sensing currents generated by sampling a current flowing through the power line at a sampling frequency, generates second current data including average, minimum, and maximum sensing currents of a second period less than the first period based on the sensing currents, and includes a first controller controlling the image data or the power supply based on the second current data, and a timing controller which communicates with the current sensor, and includes a second controller controlling the image data or the power supply based on the first and second current data. ## Claims ### Claim 1 A display device, comprising: a display panel which displays an image based on image data; a power supply which provides a driving voltage to the display panel through a power line; a current sensor which generates first current data including an average sensing current, a minimum sensing current, and a maximum sensing current of a first period based on sensing currents generated by sampling a current flowing through the power line at a sampling frequency, generates second current data including an average sensing current, a minimum sensing current, and a maximum sensing current of a second period shorter than the first period based on the sensing currents, and includes a first controller controlling the image data or the power supply based on the second current data; and a timing controller which communicates with the current sensor every frame period and includes a second controller controlling the image data or the power supply based on the first current data and the second current data. ### Claim 2 (depends on 1) The display device of claim 1, wherein the second period is shorter than a frame period. ### Claim 3 (depends on 1) The display device of claim 1, wherein the current sensor further includes: a first current data generator which generates the first current data based on the sensing currents; and a second current data generator which generates the second current data based on the sensing currents. ### Claim 4 (depends on 3) The display device of claim 3, wherein the current sensor further includes a third current data generator which generates third current data including an average sensing current, a minimum sensing current, and a maximum sensing current of a third period longer than the first period based on the sensing currents. ### Claim 5 (depends on 4) The display device of claim 4, wherein the first period is equal to the frame period, and wherein the third period is equal to a plurality of frame periods. ### Claim 6 (depends on 3) The display device of claim 3, wherein the current sensor further includes an analog-to-digital converter which converts a voltage between opposite terminals of a sensing resistor connected to the power line into the sensing currents based on the sampling frequency. ### Claim 7 (depends on 3) The display device of claim 3, wherein the current sensor further includes a current transmission memory which stores the first current data and the second current data, and wherein the timing controller further includes a current receiving memory which receives the first current data and the second current data from the current transmission memory and stores the first current data and the second current data. ### Claim 8 (depends on 7) The display device of claim 7, wherein the current transmission memory and the current receiving memory communicate using an I2C interface. ### Claim 9 (depends on 1) The display device of claim 1, wherein the first controller includes an over-current detector which generates a control signal for controlling a magnitude of the driving voltage based on the second current data. ### Claim 10 (depends on 1) The display device of claim 1, wherein the timing controller further includes net power controller which generates a load of the image data based on the image data. ### Claim 11 (depends on 10) The display device of claim 10, wherein the second controller includes a global current manager which controls a grayscale of the image data based on the average sensing current of the first current data, the average sensing current of the second current data, and the load of the image data. ### Claim 12 (depends on 10) The display device of claim 10, wherein the second controller includes an over-current protector which generates a control signal for controlling a supply of the driving voltage to the display panel based on the maximum sensing current of the first current data, the maximum sensing current of the second current data, and the load of the image data. ### Claim 13 (depends on 1) The display device of claim 1, wherein the second controller includes a current detection burnt protector which generates a control signal for controlling a supply of the driving voltage to the display panel based on the minimum sensing current and the maximum sensing current of the first current data, and the minimum sensing current and the maximum sensing current of the second current data. ### Claim 14 A current sensor, comprising: a first current data generator which generates first current data including an average sensing current, a minimum sensing current, and a maximum sensing current of a first period based on sensing currents generated by sampling a current flowing through a power line, which provides a driving voltage to a display panel from a power supply, at a sampling frequency; a second current data generator which generates second current data including an average sensing current, a minimum sensing current, and a maximum sensing current of a second period shorter than the first period based on the sensing currents; and a controller which controls the image data or the power supply based on the second current data, wherein the current sensor transmits the first current data and the second current data to a timing controller every frame period. ### Claim 15 (depends on 14) The current sensor of claim 14, wherein the second period is shorter than a frame period. ### Claim 16 (depends on 14) The current sensor of claim 14, further comprising: a third current data generator which generates third current data including an average sensing current, a minimum sensing current, and a maximum sensing current of a third period longer than the first period based on the sensing currents. ### Claim 17 (depends on 16) The current sensor of claim 16, wherein the first period is equal to a frame period, and wherein the third period is equal to a plurality of frame periods. ### Claim 18 (depends on 14) The current sensor of claim 14, further comprising: an analog-to-digital converter which converts a voltage between opposite terminals of a sensing resistor connected to the power line into the sensing currents based on the sampling frequency. ### Claim 19 (depends on 14) The current sensor of claim 14, further comprising: a current transmission memory which stores the first current data and the second current data, and transmits the first current data and the second current data to the timing controller. ### Claim 20 (depends on 14) The current sensor of claim 14, wherein the controller includes an over-current detector which generates a control signal for controlling a magnitude of the driving voltage based on the second current data.