Semiconductor device and display device

• US 10,031,362 B2
• Filed: 11/23/2015
• Issued: 07/24/2018
• Est. Priority Date: 12/02/2014
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Hatsumi, Ryo, Ishitani, Tetsuji
• Primary Examiner(s): Merlin, Jessica M
• Application Number:
  US14/948,987
• Publication Number:
  US 20160154263A1
• Time in Patent Office: 974 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H01L 29/24 including, apart from doping materials or other impurities, only semiconductor materials not provided for in groups H01L29/16, H01L29/18, H01L29/20, H01L29/22 including organic materials H10K99/00
• CPC Class Codes: H01L 29/7869 having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate

Abstract

An increase in fabricating cost of a display module including a touch sensor is suppressed. A display device which includes a first substrate, a second substrate, and liquid crystal interposed between the first substrate and the second substrate includes a display portion. The display portion includes a sensor unit and a pixel. The sensor unit includes a first transistor, a first conductive film electrically connected to a gate of the first transistor, and a second conductive film. At least part of the first conductive film overlaps with at least part of the second conductive film. The pixel includes a second transistor, and a pixel electrode electrically connected to the second transistor. At least part of the pixel electrode overlaps with at least part of the first conductive film.

Claims

1. A display device having a display portion comprising:

a first substrate;

a second substrate; and

a liquid crystal layer positioned between the first substrate and the second substrate,

wherein the display portion includes a sensor unit and a first pixel,

wherein the sensor unit includes a first transistor, a first conductive film electrically connected to a gate of the first transistor, and a second conductive film provided under the first transistor,

wherein at least part of the first conductive film overlaps with at least part of the second conductive film,

wherein the first conductive film overlaps with the second conductive film with the first substrate positioned therebetween,

wherein the first pixel includes a second transistor and a first pixel electrode electrically connected to the second transistor, and

wherein at least part of the first pixel electrode overlaps with at least part of the first conductive film.

2. The display device according to claim 1,

wherein the gate of the first transistor and a gate of the second transistor are on a same surface.

3. The display device according to claim 1,

wherein the display portion further includes a second pixel including a second pixel electrode, and

wherein the sensor unit overlaps with the first pixel electrode and the second pixel electrode.

4. An electronic device comprising the display device according to claim 1.

5. The display device according to claim 1,

wherein the first conductive film comprises a transparent conductive material.

6. The display device according to claim 1,

wherein the second conductive film comprises a transparent conductive material.

7. A display device having a display portion comprising:

a first substrate;

a second substrate; and

a liquid crystal layer positioned between the first substrate and the second substrate,

wherein the display portion includes a sensor unit and a first pixel,

wherein the sensor unit includes a first transistor, a first conductive film electrically connected to a gate of the first transistor, and a second conductive film,

wherein the first transistor and the first conductive film are between the first substrate and the liquid crystal layer,

wherein the second conductive film is overlapped with the first conductive film with the first substrate positioned therebetween,

wherein the first pixel includes a second transistor and a first pixel electrode electrically connected to the second transistor, and

wherein at least part of the first pixel electrode overlaps with at least part of the first conductive film.

8. The display device according to claim 7,

wherein the gate of the first transistor and a gate of the second transistor are on and in contact with a same surface.

9. The display device according to claim 7,

wherein the display portion further includes a second pixel including a second pixel electrode, and

wherein the sensor unit overlaps with the first pixel electrode and the second pixel electrode.

10. An electronic device comprising the display device according to claim 7.

11. The display device according to claim 7,

wherein the first conductive film comprises a transparent conductive material.

12. The display device according to claim 7,

wherein the second conductive film comprises a transparent conductive material.

13. A display device having a display portion comprising:

a first substrate;

a second substrate; and

a liquid crystal layer positioned between the first substrate and the second substrate,

wherein the display portion includes a sensor unit and a first pixel,

wherein the sensor unit includes a first transistor and a first capacitor including a first conductive film and a second conductive film,

wherein the first transistor and the first conductive film are provided between the first substrate and the liquid crystal layer,

wherein the first conductive film overlaps with the second conductive film with the first substrate positioned therebetween,

wherein the first pixel includes a second transistor and a first pixel electrode electrically connected to the second transistor, and

wherein at least part of the first pixel electrode overlaps with at least part of the first conductive film.

14. The display device according to claim 13,

wherein the gate of the first transistor and a gate of the second transistor are on and in contact with a same surface.

15. The display device according to claim 13,

wherein the display portion further includes a second pixel including a second pixel electrode, and

wherein the sensor unit overlaps with the first pixel electrode and the second pixel electrode.

16. An electronic device comprising the display device according to claim 13.

17. The display device according to claim 13,

wherein the first conductive film comprises a transparent conductive material.

18. The display device according to claim 13,

wherein the second conductive film comprises a transparent conductive material.