# US 12,183,766 B2 · Image sensor and display device having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,766 B2 - Document ID: US12183766B2 - Status: Granted - Kind: B2 - Application number: 18/370,476 - Filed: 2023-09-20 - Published: 2024-01-11 - Granted: 2024-12-31 - Earliest claimed: 2019-04-02 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Dae Gwang Jang - Web page: https://patentgrep.com/patent/US12183766B2 ## CPC - H04N 25/77: Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components - H10F 39/198: {Contact-type image sensors [CIS]} - H04N 25/70: SSIS architectures; Circuits associated therewith - H04N 25/76: Addressed sensors, e.g. MOS or CMOS sensors - H10F 39/803: {Pixels having integrated switching, control, storage or amplification elements} - H10F 39/8037: {the integrated elements comprising a transistor} - H10F 39/811: {Interconnections} - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract An image sensor includes a sensor pixel. The sensor pixel includes a first transistor coupled between a first power source and a first node, where the first transistor is turned on in response to a first control signal, a light-sensing element coupled between the first node and a second power source, where the light-sensing element generates photocharges in response to incident light, a storage capacitor coupled in parallel to the light-sensing element between the first node and the second power source, and an amplifier including a plurality of transistors coupled in series between the first power source and an output line, where the amplifier outputs a sensing signal corresponding to a voltage of the first node in response to a first driving signal. ## Claims ### Claim 1 An image sensor comprising: a sensor pixel including: a first transistor coupled between a first power source and a first node, wherein the first transistor is turned on in response to a first control signal; a light-sensing element coupled between the first node and a second power source, wherein the light-sensing element generates photocharges in response to incident light; and an amplifier including a plurality of transistors coupled in series between the first power source and an output line, wherein the amplifier outputs a sensing signal corresponding to a voltage of the first node in response to a first driving signal. ### Claim 2 (depends on 1) The image sensor according to claim 1, further comprising: a storage capacitor coupled in parallel to the light-sensing element between the first node and the second power source. ### Claim 3 (depends on 1) The image sensor according to claim 1, wherein the amplifier comprises: a second transistor coupled between the first power source and the output line, wherein the second transistor includes a gate electrode coupled to the first node; and a third transistor coupled between the second transistor and the output line, wherein the third transistor includes a gate electrode coupled to a first driving line, the first driving line being configured to supply the first driving signal. ### Claim 4 (depends on 3) The image sensor according to claim 3, wherein the amplifier further comprises a fourth transistor coupled between the third transistor and the output line, and the fourth transistor outputs the sensing signal during the interval in which the first driving signal is supplied. ### Claim 5 (depends on 4) The image sensor according to claim 4, further comprising: a first driving line coupled in common to gate electrodes of the third and fourth transistors, wherein the first driving line transmits the first driving signal therethrough; and a first resistor element coupled between the gate electrode of the third transistor and the first driving line. ### Claim 6 (depends on 5) The image sensor according to claim 5, wherein the first resistor element comprises a transistor element coupled in a form of a diode between the first driving line and the gate electrode of the third transistor. ### Claim 7 (depends on 5) The image sensor according to claim 5, wherein the amplifier comprises: a second resistor element coupled between the first resistor element and the first driving line; and a fifth transistor coupled between the third transistor and the fourth transistor, wherein the fifth transistor includes a gate electrode coupled between the first and second resistor elements. ### Claim 8 (depends on 1) The image sensor according to claim 1, wherein, during each cycle of a sensing period in which the sensor pixel is activated, the first control signal and the first driving signal are sequentially supplied to the sensor pixel at an interval of a predetermined time. ### Claim 9 (depends on 1) The image sensor according to claim 1, wherein the light-sensing element is a photodiode. ### Claim 10 (depends on 1) The image sensor according to claim 1, wherein the sensor pixel further comprises a transfer transistor coupled between the first node and the light-sensing element, wherein the transfer transistor is turned on in response to a second control signal. ### Claim 11 (depends on 10) The image sensor according to claim 10, wherein the first and second control signals are sequentially supplied to the sensor pixel during each cycle of a sensing period during which the sensor pixel is activated, and the first driving signal is individually supplied subsequent to the first and second control signals a plurality of times during each cycle. ### Claim 12 A display device comprising: a display panel including a display pixel; and an image sensor including a sensor pixel, wherein the sensor pixel comprises: a first transistor coupled between a first power source and a first node, wherein the first transistor is turned on in response to a first control signal; a light-sensing element coupled between the first node and a second power source, wherein the light-sensing element generates photocharges in response to incident light; and an amplifier including a plurality of transistors coupled in series between the first power source and an output line, wherein the amplifier outputs a sensing signal corresponding to a voltage of the first node in response to a first driving signal. ### Claim 13 (depends on 12) The display devicd according to claim 12, further comprising: a storage capacitor coupled in parallel to the light-sensing element between the first node and the second power source. ### Claim 14 (depends on 12) The display device according to claim 12, wherein the amplifier comprises: a second transistor coupled between the first power source and the output line, wherein the second transistor includes a gate electrode coupled to the first node; and a third transistor coupled between the second transistor and the output line, wherein the third includes a gate electrode coupled to a first driving line, the first driving line being configured to supply the first driving signal. ### Claim 15 (depends on 14) The display device according to claim 14, wherein the amplifier further comprises a fourth transistor coupled between the third transistor and the output line, and the fourth transistor outputs a sensing signal during the interval in which the first driving signal is supplied. ### Claim 16 (depends on 12) The display device according to claim 12, wherein, during each cycle of a sensing period in which the sensor pixel is activated, the first control signal and the first driving signal are sequentially supplied to the sensor pixel at an interval of a predetermined time. ### Claim 17 (depends on 12) The display device according to claim 12, wherein the sensor pixel further comprises a transfer transistor coupled between the first node and the light-sensing element, wherein the transfer transistor is turned on in response to a second control signal. ### Claim 18 (depends on 12) The display device according to claim 12, wherein the image sensor is arranged on a rear surface of the display panel, and the sensor pixel is arranged in a sensing area which overlaps a portion of a display area in which the display pixel is arranged.