# US 12,193,281 B2 · OLED display panel and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,193,281 B2 - Document ID: US12193281B2 - Status: Granted - Kind: B2 - Application number: 17/654,823 - Filed: 2022-03-15 - Published: 2022-09-29 - Granted: 2025-01-07 - Earliest claimed: 2021-03-25 - Assignees: EverDisplay Optronics (Shanghai) Limited - Applicants: Everdisplay Optronics (Shanghai) Co., Ltd. - Inventors: Pengfei Li - Web page: https://patentgrep.com/patent/US12193281B2 ## CPC - H10K 59/126: Shielding, e.g. light-blocking means over the TFTs - H10K 59/1201: {Manufacture or treatment} - H10K 59/40: OLEDs integrated with touch screens - H10K 71/233: {by photolithographic etching} - H10K 59/8791: {Arrangements for improving contrast, e.g. preventing reflection of ambient light} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The present disclosure relates to the technical field of display devices, in particular to an OLED display panel and a manufacturing method thereof. The OLED display panel includes a display region and a blind hole region located in the display region disposed on a substrate, wherein the display region includes: a driving circuit arranged on the substrate; a light-emitting layer disposed above the driving circuit; and the blind hole region includes: an opening; traces arranged on the substrate and surrounding the opening; and a light-shielding layer disposed above the traces, wherein the traces and a part of the driving circuit are located on a film layer, and the light-shielding layer and another part of the driving circuit are located on another film layer. ## Claims ### Claim 1 An OLED display panel, comprising a display region and a blind hole region located in the display region disposed on a substrate, wherein the display region comprises: a driving circuit arranged on the substrate; and a light-emitting layer disposed above the driving circuit; and the blind hole region comprises: an opening; traces arranged on the substrate and surrounding the opening; and a light-shielding layer disposed above the traces, wherein the traces and a part of the driving circuit are located on a first film layer, and the light-shielding layer and another part of the driving circuit are located on a second film layer. ### Claim 2 (depends on 1) The OLED display panel according to claim 1, wherein the blind hole region further comprises a photoresist, wherein the photoresist is arranged between the light shielding layer and the traces, on an upper surface of the light shielding layer, and on side surfaces of the light shielding layer and the traces. ### Claim 3 (depends on 1) The OLED display panel according to claim 1, wherein the blind hole region is flush with the display region in a height direction. ### Claim 4 (depends on 3) The OLED display panel according to claim 3, further comprising: an encapsulating glass disposed above the display region and the blind hole region; and a touch layer disposed on an upper surface of the encapsulation glass. ### Claim 5 (depends on 4) The OLED display panel according to claim 4, further comprising: a polarizing layer disposed on an upper surface of the touch layer, wherein the touch layer and the polarizing layer are provided with a hollow structure at a position corresponding to the opening, and the hollow structure is filled with transparent optical glue; and a cover-plate glass glued on an upper surface of the polarizing layer through the transparent optical glue. ### Claim 6 (depends on 1) The OLED display panel according to claim 1, further comprising: a camera, disposed on a side of the substrate away from the display region and being corresponding to the blind hole region, wherein a lens group of the camera is located in a light-transmitting region of the opening. ### Claim 7 (depends on 1) The OLED display panel according to claim 1, wherein the light shielding layer is formed as an indium tin oxide-silver-indium tin oxide composite film. ### Claim 8 (depends on 1) The OLED display panel according to claim 1, wherein the substrate is formed as a transistor array substrate having a low temperature polysilicon thin film. ### Claim 9 A method for manufacturing an OLED display panel, comprising: providing a substrate, wherein a display region and a blind hole region located in the display region are disposed on the substrate, and an opening is formed in the blind hole region; forming a driving circuit located in the display region, traces located in the blind hole region and surrounding the opening, and a light shielding layer located above the traces by performing a patterning process on the substrate, wherein the traces and a part of the driving circuit are located on a first film layer, and the light-shielding layer and another part of the driving circuit are located on a second film layer; forming a light-emitting layer over the driving circuit. ### Claim 10 (depends on 9) The manufacturing method according to claim 9, wherein the patterning process comprises multi-steps photolithography steps; wherein, a formation of the traces is earlier than a formation of the driving circuit; wherein, in a next photolithography step after forming the traces, the forming of the driving circuit in the display region is continued and at the same time the light shielding layer in the blind hole region is formed. ### Claim 11 (depends on 10) The manufacturing method according to claim 10, wherein a photoresist is retained between the light shielding layer and the traces; and the photoresist is formed on an upper surface of the light shielding layer, and side surfaces of the light shielding layer and the traces. ### Claim 12 (depends on 10) The method according to claim 10, wherein each of the multi-steps photolithography steps comprises: depositing a thin film in a preset region; coating a photoresist on an upper surface of the thin film, and forming a photoresist layer with a preset pattern by exposing and developing the photoresist via a photo-mask having the preset pattern; etching a portion of the thin film not being covered by the photoresist layer; forming a thin film layer having the preset pattern photoresist by stripping the photoresist layer. ### Claim 13 (depends on 9) The manufacturing method according to claim 9, wherein after forming the light-emitting layer, the display region and the blind hole region are flush with each other in a height direction.