# US 10,503,952 B2 · Fingerprint identification display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,503,952 B2 - Document ID: US10503952B2 - Status: Granted - Kind: B2 - Application number: 15/743,130 - Filed: 2017-07-19 - Published: 2019-04-04 - Granted: 2019-12-10 - Earliest claimed: 2016-08-02 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: Haisheng Wang; Xue Dong; Jing Lv; Chun Wei Wu; Yingming Liu; Xiaoliang Ding - Web page: https://patentgrep.com/patent/US10503952B2 ## CPC - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen} - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A fingerprint identification display device includes: a display panel; a light guide plate arranged on a light emitting surface of the display panel; a light emitting component configured to emit modulated light; and a plurality of photosensitive induction units arranged in an array and arranged below the light guide plate, in which the modulated light is transmitted between the light guide plate and the display panel in a total reflection mode. ## Claims ### Claim 1 A fingerprint identification display device, comprising: a display panel; a light guide plate arranged on a light emitting surface of the display panel; a light emitting component configured to emit modulated light; and a plurality of photosensitive induction units arranged in an array and arranged below the light guide plate, wherein the modulated light is transmitted between the light guide plate and the display panel in a total reflection mode. ### Claim 2 (depends on 1) The fingerprint identification display device according to claim 1, wherein each of the photosensitive induction unit comprises a photosensitive diode and a control switching transistor, the photosensitive diode is configured to sense the modulated light reflected by a ridge of a fingerprint, and the control switching transistor is configured to control the photosensitive diode to convert the modulated light into a potential and output the potential. ### Claim 3 (depends on 2) The fingerprint identification display device according to claim 2, further comprising: identification scanning lines and recognition output lines, wherein the identification scanning lines are configured to load identification scanning signals to the control switching transistor, and the recognition output lines are configured to load a negative bias to the photosensitive diode by the control switching transistor, or the recognition output lines are configured to read electrical signals output by the photosensitive diode. ### Claim 4 (depends on 3) The fingerprint identification display device according to claim 3, wherein each of the identification scanning lines corresponds to each row of the photosensitive induction units in a one-to-one manner, each of the recognition output lines corresponds to each column of the photosensitive induction units in a one-to-one manner; or each of the identification scanning lines corresponds to each column of the photosensitive induction units in a one-to-one manner, each of the recognition output lines corresponds to each row of the photosensitive induction units in a one-to-one manner. ### Claim 5 (depends on 1) The fingerprint identification display device according to claim 1, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged in the display panel. ### Claim 6 (depends on 5) The fingerprint identification display device according to claim 5, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged in a region covered by a black matrix in the display panel. ### Claim 7 (depends on 1) The fingerprint identification display device according to claim 1, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged on a surface of the light guide plate close to the display panel. ### Claim 8 (depends on 7) The fingerprint identification display device according to claim 7, further comprising, a transparent reflection film, wherein the transparent reflection film is disposed on the surface of the light guide plate close to the display panel and arranged between the light guide plate and each of the photosensitive induction units, and a refractive index of the transparent reflection film is smaller than a refractive index of the light guide plate. ### Claim 9 (depends on 8) The fingerprint identification display device according to claim 8, wherein the transparent reflection film is made of inorganic material. ### Claim 10 (depends on 1) The fingerprint identification display device according to claim 1, wherein the light guide plate is a protective cover plate which is arranged above the display panel. ### Claim 11 (depends on 10) The fingerprint identification display device according to claim 10, wherein the protective cover plate has a groove structure at a frame facing a side of the display panel, and the light emitting component is in the groove structure. ### Claim 12 (depends on 1) The fingerprint identification display device according to claim 1, further comprising a protective cover plate arranged on the display panel, wherein the light guide plate is arranged between the display panel and the protective cover plate. ### Claim 13 (depends on 12) The fingerprint identification display device according to claim 12, wherein the light emitting component is arranged at at least two sides of the light guide plate opposite to each other. ### Claim 14 (depends on 11) The fingerprint identification display device according to claim 11, further comprising a blocking component arranged on the light emitting component, wherein a positive projection of the blocking component on the display panel covers at least a portion of a positive projection of the light emitting component. ### Claim 15 (depends on 14) The fingerprint identification display device according to claim 14, wherein the positive projection of the blocking component on the display panel covers a whole positive projection of the light emitting component. ### Claim 16 (depends on 1) The fingerprint identification display device according to claim 1, wherein the light emitting component is an OLED light source or a LED light source for emitting modulated infrared light or modulated visible light. ### Claim 17 (depends on 2) The fingerprint identification display device according to claim 2, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged in the display panel. ### Claim 18 (depends on 2) The fingerprint identification display device according to claim 2, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged on a surface of the light guide plate close to the display panel. ### Claim 19 (depends on 2) The fingerprint identification display device according to claim 2, wherein the light guide plate is a protective cover plate which is arranged above the display panel. ### Claim 20 (depends on 13) The fingerprint identification display device according to claim 13, further comprising a blocking component arranged on the light emitting component, wherein a positive projection of the blocking component on the display panel covers at least a portion of a positive projection of the light emitting component.