# US 2025/0148976 A1 · Display device and method of driving the same, and electronic device including the display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0148976 A1 - Document ID: US20250148976A1 - Status: Published application - Kind: A1 - Application number: 18/749,138 - Filed: 2024-06-20 - Published: 2025-05-08 - Earliest claimed: 2023-11-07 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hyo Min KIM - Web page: https://patentgrep.com/patent/US20250148976A1 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G06F 3/0418: {for error correction or compensation, e.g. based on parallax, calibration or alignment} - G06F 3/042: by opto-electronic means - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0852: being a dynamic memory with more than one capacitor - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/041: Temperature compensation - G09G 2330/02: Details of power systems and of start or stop of display operation - 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 2354/00: Aspects of interface with display user - G09G 2360/144: the light being ambient light - G09G 2360/145: the light originating from the display screen - 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) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract A display device includes: a display panel including pixels each having a light emitting element located between a first power source receiving a first power voltage and a second power line receiving a second power voltage, and photo sensors including a light receiving element located between a third power line receiving a reset voltage and the second power line; at least one temperature sensor for sensing a temperature of the display panel; a power supply for supplying the first power voltage, the second power voltage, and the reset voltage; and a controller connected to the temperature sensor and the power supply. The controller controls the power supply such that a voltage value of the reset voltage is changed based on the temperature of the display panel. ## Claims ### Claim 1 A display device comprising: a display panel comprising pixels each including a light emitting element located between a first power source receiving a first power voltage and a second power line receiving a second power voltage, and photo sensors each including a light receiving element located between a third power line receiving a reset voltage and the second power line; at least one temperature sensor configured to sense a temperature of the display panel; a power supply configured to supply the first power voltage, the second power voltage, and the reset voltage; and a controller connected to the temperature sensor and the power supply, wherein the controller controls the power supply such that a voltage value of the reset voltage is changed based on the temperature of the display panel. ### Claim 2 (depends on 1) The display device of claim 1, wherein the power supply changes the reset voltage such that a voltage difference between the reset voltage and the second power voltage is decreased when the temperature of the display panel increases. ### Claim 3 (depends on 2) The display device of claim 2, wherein the power supply increases a voltage value of the second power voltage when the temperature of the display panel increases. ### Claim 4 (depends on 1) The display device of claim 1, wherein the power supply changes the reset voltage such that a voltage difference between the reset voltage and the second power voltage is increased when the temperature of the display panel decreases. ### Claim 5 (depends on 4) The display device of claim 4, wherein the power supply decreases a voltage value of the second power voltage when the temperature of the display panel decreases. ### Claim 6 (depends on 1) The display device of claim 1, wherein the controller further includes a storage device configured to store a lookup table including voltage values of the second power voltage and voltage values of the reset voltage, which correspond to a plurality of temperature values. ### Claim 7 (depends on 1) The display device of claim 1, wherein each of the photo sensors includes: a second transistor connected between the first power line and a first node, the second transistor including a gate electrode connected to a reset control line; the light receiving element connected between the first node and the second power line; a first transistor including a first electrode connected to a fourth power line receiving a common voltage and a gate electrode connected to the first node; and a third transistor connected between a second electrode of the first transistor and a readout line, the third transistor including a gate electrode connected to a sensing scan line. ### Claim 8 (depends on 7) The display device of claim 7, further comprising: a reset circuit configured to generate a reset signal supplied to the reset control line, using a gate-on voltage supplied from the power supply; a sensing scan driver configured to supply a sensing scan signal to the sensing scan line; and a readout circuit configured to receive a sensing signal from the readout line. ### Claim 9 (depends on 8) The display device of claim 8, wherein the controller controls the power supply such that a voltage value of the gate-on voltage is changed based on the temperature of the display panel. ### Claim 10 (depends on 9) The display device of claim 9, wherein the power supply decreases the voltage value of the gate-on voltage when the temperature of the display panel increases, and increases the voltage value of the gate-on voltage when the temperature of the display panel decreases. ### Claim 11 (depends on 10) The display device of claim 10, wherein the controller further includes a storage device configured to store a lookup table including voltage values of the second power voltage, voltage values of the reset voltage, and voltage values of the gate-on voltage, which correspond to a plurality of temperature values. ### Claim 12 (depends on 8) The display device of claim 8, wherein the display panel is divided into at least two blocks, and the photo sensors located in the blocks different from each other are connected to different reset control lines. ### Claim 13 (depends on 12) The display device of claim 12, wherein the photo sensors included in a first block among the at least two blocks are connected to a first reset control line, and photo sensors included in a second block different from the first block among the at least two blocks are connected to a second reset control line, and wherein the first reset control line is supplied with a first reset signal from a first reset circuit, and the second reset control line is supplied with a second reset signal from a second reset circuit. ### Claim 14 (depends on 13) The display device of claim 13, wherein the power supply supplies a first gate-on voltage to the first reset circuit based on a temperature of the first block, and supplies a second gate-on voltage to the second reset circuit based on a temperature of the second block. ### Claim 15 A method of driving a display device including photo sensors each having a light receiving element located between a first power line receiving a reset voltage and a second power line receiving a second power voltage, the method comprising: sensing a temperature of a display panel including the photo sensors; and changing voltage values of the reset voltage and the second power voltage, which are supplied to the photo sensors, based on the temperature of the display panel. ### Claim 16 (depends on 15) The method of claim 15, wherein, in the changing of the voltage values of the reset voltage and the second power voltage, the reset voltage and the second power voltage: are controlled such that a voltage difference between the reset voltage and the second power voltage is decreased when the temperature of the display panel increases; and are controlled such that the voltage difference between the reset voltage and the second power voltage is increased when the temperature of the display panel decreases. ### Claim 17 (depends on 15) The method of claim 15, wherein each of the photo sensors includes an N-type transistor connected between the first power line and the light receiving element, the N-type transistor being turned on by a reset signal, and wherein a voltage value of the reset signal is changed based on the temperature of the display panel. ### Claim 18 (depends on 17) The method of claim 17, wherein a voltage value of a gate-on voltage of the reset signal is decreased when the temperature of the display panel increases, and is increased when the temperature of the display panel decreases. ### Claim 19 (depends on 17) The method of claim 17, wherein the display panel is divided into a plurality of blocks, and a voltage of a reset signal supplied to each of the plurality of blocks is changed based on the temperature of the display panel. ### Claim 20 An electronic device comprising: a display panel including pixels and photo sensors; a voltage generating circuit configured to supply a first power voltage and a second power voltage to the pixels, and supply a reset voltage and the second power voltage to the photo sensors; a temperature sensor configured to sense a temperature of the display panel; and a controller configured to control the voltage generating circuit based on the temperature of the display panel, which is sensed by the temperature sensor, wherein the controller controls the voltage generating circuit such that voltage values of the reset voltage and the second power voltage are changed based on the temperature of the display panel.