Granted Patent B2

US 12,200,950 · App. 18/278,199 · Granted Jan 14, 2025

Inventors: Hiromichi Godo (Isehara, JP); Yoshiyuki Kurokawa (Sagamihara, JP); Kouhei Toyotaka (Isehara, JP); Kazuki Tsuda (Atsugi, JP); Satoru Ohshita (Hadano, JP); Hidefumi Rikimaru (Tama, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

H10K39/34G06F3/013G09G3/3208H10K59/65G09G2330/021G09G2354/00G09G2360/14

Abstract

Claims (81)

1. An electronic device with an eye tracking function comprising:

a display device; and

an optical system,

wherein the display device comprises a first light-emitting element, a second light-emitting element, a sensor portion, and a driver circuit portion,

wherein the sensor portion comprises a light-receiving element,

wherein the first light-emitting element is configured to emit infrared light,

wherein the second light-emitting element is configured to emit visible light,

wherein the light-receiving element is configured to detect the infrared light that is emitted from the first light-emitting element and reflected by an eyeball of a user,

wherein the first light-emitting element and the second light-emitting element are placed in one layer,

wherein the first light-emitting element and the second light-emitting element have a common electrode, and

wherein the common electrode and the light-receiving element overlap each other.

2. The electronic device according to claim 1 ,

wherein the display device further comprises a first substrate and a second substrate,

wherein the first substrate is placed between the first light-emitting element and the second light-emitting element and the sensor portion,

wherein the second substrate overlaps with the first substrate with the first light-emitting element and the second light-emitting element therebetween,

wherein the first substrate has a light-transmitting property at least with respect to infrared light, and

wherein the second substrate has a light-transmitting property with respect to visible light and infrared light.

3. The electronic device according to claim 1 ,

wherein the light-receiving element is formed over a silicon substrate.

4. The electronic device according to claim 1 ,

wherein the first light-emitting element is placed outside a display region in a top view.

5. The electronic device according to claim 1 ,

wherein the first light-emitting element is placed in a display region in a top view.

6. The electronic device according to claim 1 ,

wherein the sensor portion is placed in a display region in a top view.

7. The electronic device according to claim 1 ,

wherein the sensor portion is placed outside a display region in a top view.

8. The electronic device according to claim 1 ,

wherein the display device further comprises an image processing portion, and

wherein eye tracking is performed using the first light-emitting element, the sensor portion, and the image processing portion.

9. The electronic device according to claim 8 ,

wherein the image processing portion comprises an arithmetic circuit configured to perform a product-sum operation.

10. The electronic device according to claim 9 ,

wherein the arithmetic circuit comprises a transistor comprising a metal oxide in a channel formation region.

11. The electronic device according to claim 1 ,

wherein a light-emitting layer included in the first light-emitting element and a light-emitting layer included in the second light-emitting element each comprise a light-emitting organic compound.

12. An electronic device with an eye tracking function comprising:

a display device; and

an optical system,

wherein the display device comprises a first light-emitting element, a second light-emitting element, a sensor portion, and a driver circuit portion,

wherein the sensor portion comprises a light-receiving element,

wherein the first light-emitting element is configured to emit infrared light,

wherein the second light-emitting element is configured to emit visible light,

wherein the light-receiving element is configured to detect the infrared light that is emitted from the first light-emitting element and reflected by an eyeball of a user,

wherein the first light-emitting element, the second light-emitting element, and the sensor portion are placed parallel to a top surface of a pixel electrode included in the first light-emitting element and the second light-emitting element,

wherein the first light-emitting element and the second light-emitting element have a common electrode, and

wherein the common electrode and the light-receiving element overlap each other.

13. The electronic device according to claim 12 ,

wherein the display device further comprises a first substrate and a second substrate,

wherein the first substrate overlaps with the second substrate with the first light-emitting element, the second light-emitting element, and the sensor portion therebetween, and

wherein the second substrate has a light-transmitting property with respect to visible light and infrared light.

14. An electronic device with an eye tracking function comprising:

a display device; and

an optical system,

wherein the display device comprises a first light-emitting element, a second light-emitting element, a third light-emitting element, an organic photodiode, and a driver circuit portion,

wherein the first light-emitting element, the second light-emitting element, and the third light-emitting element are configured to emit visible light,

wherein the organic photodiode is configured to detect the visible light emitted from the first light-emitting element and reflected by an eyeball of a user,

wherein the first light-emitting element is placed outside a display region in a top view,

wherein the second light-emitting element is placed inside the display region in the top view,

wherein the first light-emitting element and the second light-emitting element have a common electrode,

wherein the first light-emitting element and the second light-emitting element are placed in one layer,

wherein the common electrode and the organic photodiode overlap each other, and

wherein light emitted from the third light-emitting element is introduced into eyes through an optical route using total reflection and a half mirror.

15. The electronic device according to claim 14 ,

wherein the display device further comprises a first substrate and a second substrate,

wherein the first light-emitting element, the second light-emitting element, and the organic photodiode are placed between the first substrate and the second substrate,

wherein the first light-emitting element, the second light-emitting element, and the organic photodiode are placed parallel to a top surface of the first substrate, and

wherein the second substrate has a light-transmitting property with respect to visible light.

16. The electronic device according to claim 14 ,

wherein the organic photodiode is placed inside the display region in the top view.

17. The electronic device according to claim 14 ,

wherein the organic photodiode is placed outside the display region in the top view.

18. The electronic device according to claim 14 ,

wherein the display device further comprises an image processing portion, and

wherein eye tracking is performed using the first light-emitting element, the organic photodiode, and the image processing portion.

19. The electronic device according to claim 18 ,

wherein the image processing portion comprises an arithmetic circuit configured to perform a product-sum operation.

20. The electronic device according to claim 19 ,

wherein the arithmetic circuit comprises a transistor comprising a metal oxide in a channel formation region.

21. The electronic device according to claim 14 ,

wherein a light-emitting layer included in the first light-emitting element and a light-emitting layer included in the second light-emitting element each comprise a light-emitting organic compound.

Assignments (1)

Priority Claims (2)

Continuity (2)

References Cited (109)

Cited By (1)

US 12,402,857