# US 11,906,713 B2 · Optical fingerprint sensing module and display device with optical fingerprint detection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,713 B2 - Document ID: US11906713B2 - Status: Granted - Kind: B2 - Application number: 16/885,302 - Filed: 2020-05-28 - Published: 2020-09-17 - Granted: 2024-02-20 - Earliest claimed: 2015-10-14 - Assignees: Novatek Microelectronics Corp. - Applicants: NOVATEK Microelectronics Corp. - Inventors: Feng-Jung Kuo; Min Huang; Jung-Chung Lee; Chi-Ting Chen; Li-Yuan Chang; I-Hsiu Chen; Chin-Hui Huang - Web page: https://patentgrep.com/patent/US11906713B2 ## CPC - G02B 13/14: for use with infrared or ultraviolet radiation ({G02B13/008, } G02B13/16 take precedence) - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G02B 1/11: Anti-reflection coatings - G02B 5/005: {Diaphragms (for cameras G03B9/02)} - G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation} - G02B 6/00: Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings - G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)} - G02B 6/0001: {specially adapted for lighting devices or systems (lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract An optical fingerprint sensing module includes an image sensing device, a light source and a light shielding structure. The image sensing device is configured to sense light transmitted from a fingerprint of a finger on a display panel. The image sensing device includes a light sensing plane having a first geometric center. The light source includes a light emitting plane having a second geometric center. The first geometric center is separated from the second geometric center by a distance from 2 mm to 20 mm. The light shielding structure is disposed between the image sensing device and the light source. In examples, the optical fingerprint sensing module further includes a field angle controller to constrain light pass there through with a field angle of 5-60 degrees. A display device including an optical fingerprint sensing module is disclosed herein as well. ## Claims ### Claim 1 An optical fingerprint sensing module, comprising: an image sensing device configured to sense light transmitted from a fingerprint on a display panel and comprising a light sensing plane having a first geometric center; at least one light source adjacent to the image sensing device, wherein the light source comprises a light emitting plane having a second geometric center, and the first geometric center is separated from the second geometric center by a distance ranged from 2 mm to 20 mm; a light shielding structure disposed between the image sensing device and the light source; and a field angle controller cooperated with the light source such that light emitted from the light source or passing through the field angle controller has a field angle ranged from 5 degrees to 60 degrees, wherein the field angle controller comprises a top plate extending laterally from a top of the light shielding structure and a wall extending downwards from the top plate, the top plate has an aperture aligned with the light emitting plane and disposed above the light source, a width of the aperture is smaller than a width of the light emitting plane of the light source, the light source is positioned between the wall and the light shielding structure, and the wall surrounds the light shielding structure and the light source. ### Claim 2 (depends on 1) The optical fingerprint sensing module according to claim 1, wherein the field angle ranges from 15 degrees to 35 degrees. ### Claim 3 (depends on 1) The optical fingerprint sensing module according to claim 1, wherein the field angle ranges from 20 degrees to 30 degrees. ### Claim 4 (depends on 1) The optical fingerprint sensing module according to claim 1, wherein the field angle has an axis that is substantially perpendicular to the light sensing plane. ### Claim 5 (depends on 1) The optical fingerprint sensing module according to claim 1, wherein the distance ranges from 4 mm to 10 mm. ### Claim 6 (depends on 1) The optical fingerprint sensing module according to claim 1, wherein the image sensing device has a bottom that is coplanar with a bottom of the light source. ### Claim 7 (depends on 1) The optical fingerprint sensing module according to claim 1, wherein the light shielding structure surrounds the image sensing device. ### Claim 8 (depends on 1) The optical fingerprint sensing module according to claim 1, wherein the light shielding structure has an opening exposing the image sensing device. ### Claim 9 (depends on 1) A display device with optical fingerprint detection, comprising: a display panel having a display side and a backside opposite to the display side; and the optical fingerprint sensing module according to claim 1 disposed at the backside of the display panel. ### Claim 10 (depends on 9) The display device according to claim 9, wherein the light emitting plane and the light sensing plane face the backside of the display panel. ### Claim 11 An optical fingerprint sensing module, comprising: an image sensing device; a light shielding structure surrounding the image sensing device, wherein the light shielding structure has an opening exposing the image sensing device; at least one light source positioned out of the light shielding structure such that the light shielding structure is located between the light source and the image sensing device; and a field angle controller adjacent to the light source and cooperated with the light source such that light emitted from the light source or passing through the field angle controller has a field angle ranged from 5 degrees to 60 degrees, wherein the field angle controller comprises a top plate extending laterally from a top of the light shielding structure and a wall extending downwards from the top plate, the top plate has an aperture aligned with the light emitting plane in a direction perpendicular to the light emitting plane and disposed above the light source, a width of the aperture is smaller than a width of a light emitting plane of the light source, the light source is positioned between the wall and the light shielding structure, and the wall surrounds the light shielding structure and the light source. ### Claim 12 (depends on 11) The optical fingerprint sensing module according to claim 11, wherein the image sensing device comprises a light sensing plane having a first geometric center, and the light source comprises the light emitting plane having a second geometric center, wherein the first geometric center is separated from the second geometric center by a distance ranged from 2 mm to 20 mm. ### Claim 13 (depends on 11) The optical fingerprint sensing module according to claim 11, wherein the field angle ranges from 15 degrees to 35 degrees.