# US 12,183,247 B2 · Display panel and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,247 B2 - Document ID: US12183247B2 - Status: Granted - Kind: B2 - Application number: 17/421,398 - Filed: 2021-05-31 - Published: 2024-01-18 - Granted: 2024-12-31 - Earliest claimed: 2021-05-20 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd.; Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd.; Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Kui Wang - Web page: https://patentgrep.com/patent/US12183247B2 ## CPC - G09G 3/2074: {using sub-pixels} - H10K 59/121: characterised by the geometry or disposition of pixel elements - H10K 50/19: Tandem OLEDs - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2300/046: with an emissive area and a light-modulating area combined in one pixel - G09G 2320/0626: for control of overall brightness - H10K 59/1213: {the pixel elements being TFTs} - H10K 59/351: {comprising more than three subpixels, e.g. red-green-blue-white [RGBW]} - H10K 59/60: OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes - 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) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The present application provides a display panel and a display device. the display panel includes a display region and a light-transmitting display region. The display region includes a first pixel unit. The light-transmitting display region includes a second pixel unit. The second pixel unit includes a first subpixel, a second subpixel, and a third subpixel. At least one subpixel of the first subpixel, the second subpixel, and the third subpixel includes at least two light-emitting layers connected in series. The display panel and the display device provided by the present application can increase a lifespan of the subpixel in the light-transmitting display region and reduce a power consumption of the display panel and the display device. ## Claims ### Claim 1 A display device, comprising a display panel; wherein the display panel comprises: a display region comprising a first pixel unit; and a light-transmitting display region comprising a second pixel unit, wherein the second pixel unit comprises a first subpixel, a second subpixel, and a third subpixel, and at least one subpixel of the first subpixel, the second subpixel, and the third subpixel comprises at least two light-emitting layers connected in series; wherein a lifespan of the first subpixel is less than a lifespan of the second subpixel, and the lifespan of the second subpixel is less than a lifespan of the third subpixel; and the subpixel comprising the at least two light-emitting layers connected in series is the first subpixel, a combination of the first subpixel and the second subpixel. or a combination of the first subpixel, the second subpixel, and the third subpixel. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the first subpixel is a blue subpixel, the second subpixel is a green subpixel, and the third subpixel is a red subpixel. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the second pixel unit further comprises an additional subpixel, and the additional subpixel comprises at least two light-emitting layers connected in series. ### Claim 4 (depends on 2) The display device according to claim 2, wherein the additional subpixel is a combination of a red light-emitting layer and a cyan light- emitting layer connected in series, a combination of a blue light-emitting layer and an orange light-emitting layer connected in series, a combination of a green light-emitting layer and a magenta light-emitting layer connected in series, or a combination of the red light-emitting layer, the green light-emitting layer, and the blue light-emitting layer connected in series. ### Claim 5 (depends on 2) The display device according to claim 2, wherein an area of the additional subpixel is equal to an area of the first subpixel, an area of the second subpixel, or an area of the third subpixel. ### Claim 6 (depends on 1) The display device according to claim 1, wherein an arrangement density of the first pixel unit is greater than or equal to an arrangement density of the second pixel unit. ### Claim 7 A display panel, comprising: a display region comprising a first pixel unit; and a light-transmitting display region comprising a second pixel unit, wherein the second pixel unit comprises a first subpixel, a second subpixel, and a third subpixel, and at least one subpixel of the first subpixel, the second subpixel, and the third subpixel comprises at least two light-emitting layers connected in series; wherein a lifespan of the first subpixel is less than a lifespan of the second subpixel, and the lifespan of the second subpixel is less than a lifespan of the third subpixel; and the subpixel comprising the at least two light-emitting layers connected in series is the first subpixel, a combination of the first subpixel and the second subpixel. or a combination of the first subpixel, the second subpixel, and the third subpixel. ### Claim 8 (depends on 7) The display panel according to claim 7, wherein the first subpixel is a blue subpixel, the second subpixel is a green subpixel, and the third subpixel is a red subpixel. ### Claim 9 (depends on 7) The display panel according to claim 7, wherein the second pixel unit further comprises an additional subpixel, and the additional subpixel comprises at least two light-emitting layers connected in series. ### Claim 10 (depends on 9) The display panel according to claim 9, wherein the additional subpixel is a combination of a red light-emitting layer and a cyan light-emitting layer connected in series, a combination of a blue light-emitting layer and an orange light- emitting layer connected in series, a combination of a green light-emitting layer and a magenta light-emitting layer connected in series, or a combination of the red light- emitting layer, the green light-emitting layer, and the blue light-emitting layer connected in series. ### Claim 11 (depends on 9) The display panel according to claim 9, wherein an area of the additional subpixel is equal to an area of the first subpixel, an area of the second subpixel, or an area of the third subpixel. ### Claim 12 (depends on 7) The display panel according to claim 7, wherein an arrangement density of the first pixel unit is greater than or equal to an arrangement density of the second pixel unit. ### Claim 13 (depends on 7) The display panel according to claim 7, wherein an area of the first pixel unit is less than or equal to an area of the second pixel unit. ### Claim 14 (depends on 7) The display panel according to claim 7, wherein a brightness of the display region is greater than or equal to a brightness of the light-transmitting display region. ### Claim 15 (depends on 7) The display panel according to claim 7, wherein the subpixel comprising the at least two light-emitting layers connected in series comprises an anode layer, a hole injection layer, a first hole transport layer, a first light-emitting layer, an electron transport layer, a charge generation layer, a second hole transport layer, a second light-emitting layer, an electron injection layer, and a cathode layer. ### Claim 16 (depends on 7) The display panel according to claim 7, further comprising a driving circuit layer, wherein the driving circuit layer comprises a first driving circuit and a second driving circuit, the first driving circuit is disposed in the display region and is electrically connected to the first pixel unit, and the second driving circuit is disposed in the display region adjacent to the light-transmitting display region and is electrically connected to the second pixel unit.