# US 10,503,953 B2 · Display device having a light sensing unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,503,953 B2 - Document ID: US10503953B2 - Status: Granted - Kind: B2 - Application number: 15/823,789 - Filed: 2017-11-28 - Published: 2018-06-14 - Granted: 2019-12-10 - Earliest claimed: 2016-12-08 - Assignees: Innolux Corporation - Applicants: Innolux Corporation - Inventors: Chang-Chiang Cheng; Chih-Hao Chang - Web page: https://patentgrep.com/patent/US10503953B2 ## CPC - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G06V 40/1329: {Protecting the fingerprint sensor against damage caused by the finger} - G09F 9/00: Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) - H10K 59/60: OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes - G06V 40/1341: {Sensing with light passing through the finger} - G06V 2201/02: Recognising information on displays, dials, clocks - H10K 59/40: OLEDs integrated with touch screens - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display device is described. The display device includes a first substrate, a second substrate, and a display layer disposed between the first substrate and the second substrate. The first substrate includes a pixel driving unit. The second substrate includes the light sensing unit. ## Claims ### Claim 1 A display device, comprising: a first substrate comprising a pixel driving unit; a second substrate comprising a light sensing unit and a black matrix, wherein the light sensing unit comprises a switching element, the switching element at least partially overlaps the pixel driving unit, and the black matrix is disposed between the switching element and the pixel driving unit; and a display layer disposed between the first substrate and the second substrate. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the first substrate comprises: a first base; the pixel driving unit disposed on the first base; and a first electrode disposed on the pixel driving unit; wherein the pixel driving unit is electrically connected with the first electrode. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the second substrate further comprises: a second base; wherein the light sensing unit is disposed on the second base, and the light sensing unit comprises a sensing transistor. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the sensing transistor overlaps the pixel driving unit in a normal direction perpendicular to the first base. ### Claim 5 (depends on 3) The display device according to claim 3, wherein the switching element is disposed on the second base, and the switching element is electrically connected with the sensing transistor. ### Claim 6 (depends on 5) The display device according to claim 5, wherein the second substrate further comprises: a light shielding layer disposed between the second base and the switching element; wherein the light shielding layer overlaps the switching element in a normal direction perpendicular to the first base. ### Claim 7 (depends on 6) The display device according to claim 6, wherein the light shielding layer and the sensing transistor are not overlapped in the normal direction. ### Claim 8 (depends on 6) The display device according to claim 6, wherein the light shielding layer overlaps the pixel driving unit in the normal direction. ### Claim 9 (depends on 3) The display device according to claim 3, wherein the sensing transistor comprises amorphous silicon, poly-silicon, or IGZO. ### Claim 10 (depends on 1) The display device according to claim 1, wherein the second substrate further comprises: a color filter layer disposed between the light sensing unit and the display layer. ### Claim 11 (depends on 10) The display device according to claim 10, wherein the second substrate further comprises—: a second base; wherein the black matrix is disposed on the second base—; and wherein the color filter layer comprises a first color portion and a second color portion, a color of the first color portion is different from a color of the second color portion, and the black matrix is disposed between the first color portion and the second color portion. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the black matrix overlaps the pixel driving unit in a direction perpendicular to the second base. ### Claim 13 (depends on 1) The display device according to claim 1, wherein the second substrate further comprises: a first conductive line and a third conductive line, which are electrically connected to the light sensing unit, the first conductive line transmits a supply voltage signal to the light sensing unit, and the third conductive line transmits a scan voltage signal to the light sensing unit. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the second substrate further comprises a second conductive line, the first conductive line and the second conductive line extend along a first direction, and the third conductive line extends along a second direction, the first direction different from the second direction. ### Claim 15 (depends on 1) The display device according to claim 1, wherein the second substrate further comprises: a fourth conductive line, the fourth conductive line connected to a sensing transistor, and the fourth conductive line transmitting a reference voltage signal to the light sensing unit. ### Claim 16 (depends on 15) The display device according to claim 15, wherein the fourth conductive line comprises a transparent electrode layer. ### Claim 17 (depends on 1) The display device according to claim 1, further comprising a backlight source, wherein the first substrate is disposed between the backlight source and the second substrate. ### Claim 18 (depends on 1) The display device according to claim 1, further comprising an external light source, wherein the external light source is disposed adjacent to the second substrate. ### Claim 19 (depends on 3) The display device according to claim 3, wherein the second base comprises a transparent material.