Display apparatus and electronic device

Inventors: Koji Kusunoki (Isehara, JP); Daisuke Kubota (Atsugi, JP); Kazunori Watanabe (Machida, JP); Susumu Kawashima (Atsugi, JP); Satoshi Yoshimoto (Isehara, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

H10W90/00 G06V40/1318 H10D86/423 H10D86/60 H10H20/857 H10K39/30 H10K59/65

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Quick Facts

Patent No.: US 12702063
App. No.: 17/927,387
Granted: Aug 4, 2026
Kind: B2

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Abstract

A display apparatus having a noncontact input function is provided. The display apparatus has a first function of detecting, with a light-receiving device, light irradiated from a light source outside a display portion and blocked by a pointing object to recognize the position pointed by the pointing object, and a second function of detecting, with the light-receiving device, light irradiated from a light source inside or outside the display portion and reflected by the pointing object to recognize the position pointed by the pointing object. The display apparatus can operate by switching the first function and the second function in accordance with the intensity of the light irradiated from the light source outside the display portion.

Claims (23)

1 . A display apparatus comprising a plurality of light-emitting devices and a plurality of light-receiving devices in a display portion,

wherein the display apparatus has

a first operational configuration that irradiates no light from the light-emitting devices and detects, with the light-receiving devices, light attenuated by being blocked by a pointing object over the display portion to recognize a position pointed to by the pointing object, and

a second operational configuration that irradiates light from the light-emitting devices and detects, with the light-receiving devices, light reflected by the pointing object to recognize a position pointed to by the pointing object in a period in which the display portion is in a non-display state,

wherein the period in which the display portion is in the non-display state is provided between images of sequential frames, and

wherein the display apparatus recognizes a position pointed by the pointing object not in contact with the display portion.

2 . The display apparatus according to claim 1 , wherein the first operational configuration and the second operational configuration are switched in accordance with intensity of a light detected with the light-receiving devices when the light-emitting devices irradiate no light.

3 . The display apparatus according to claim 1 , wherein light irradiated from the light-emitting devices is infrared light.

4 . The display apparatus according to claim 1 , wherein in the first operational configuration, a second region that is surrounded by a first region provided with the light-receiving devices detecting light with intensity higher than or equal to a first intensity and that is provided with the light-receiving devices detecting light with intensity lower than the first intensity and vicinity of the second region is recognized as a position pointed to by the pointing object.

5 . The display apparatus according to claim 1 , wherein in the second operational configuration, a fourth region that is surrounded by a third region provided with the light-receiving devices detecting light with intensity lower than or equal to a second intensity and that is provided with the light-receiving devices detecting light with intensity higher than the second intensity and vicinity of the fourth region is recognized as a position pointed to by the pointing object.

6 . The display apparatus according to claim 1 , wherein the light-receiving devices comprise a photoelectric conversion layer and comprise an organic compound in the photoelectric conversion layer.

7 . The display apparatus according to claim 1 ,

wherein the display portion comprises a display device, and

wherein the display device emits any of red light, green light, blue light, and white light.

8 . The display apparatus according to claim 7 , wherein in the second operational configuration, the light-receiving devices detect light when the display device emits no light.

9 . The display apparatus according to claim 7 , wherein the display device and the light-receiving devices each comprise a diode structure and a cathode of the display device and an anode of the light-receiving devices are electrically connected to each other.

10 . The display apparatus according to claim 7 , wherein the display device and the light-receiving devices each comprise a diode structure and a cathode of the display device and a cathode of the light-receiving devices are electrically connected to each other.

11 . The display apparatus according to claim 7 ,

wherein the display device and the light-receiving devices are electrically connected to a plurality of transistors,

wherein one or more of the plurality of transistors comprises a metal oxide in a channel formation region,

wherein the metal oxide comprises In, Zn, and M, and

wherein M is Al, Ti, Ga, Ge, Sn, Y, Zr, La, Ce, Nd, or Hf.

12 . An electronic device comprising the display apparatus according to claim 1 and an optical sensor, wherein the electronic device switches operation for detecting a position pointed to by the pointing object in accordance with intensity of light detected by the optical sensor.