Electronic device

Patent metadata

Field	Value
Publication number	US-11246532-B2
Application number	US-201816152840-A
Country	US
Kind code	B2
Filing date	Oct 5, 2018
Priority date	Feb 5, 2018
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

An electronic device to be mounted around a finger includes: a top part on which a nail of the finger is located; a bottom part disposed opposite to the top part, where a fingerprint surface of the finger is located on the bottom part; and a side part connecting the top part and the bottom part to each other, where the top part generates a nail image by image-picking up the nail, and senses a movement of the finger, based on the nail image.

First claim

What is claimed is:

1. An electronic device adapted to be mounted around a finger, the electronic device comprising:
a top part adapted to cover a nail of the finger and having a display area and a sensing area;
a bottom part disposed opposite to the top part, wherein the bottom part is configured to contact a fingerprint surface of the finger; and
a side part connecting the top part and the bottom part to each other,
wherein the top part comprises a first substrate, display pixels, light emitting parts, and light sensing parts, and wherein the display pixels, the light emitting parts, and the light sensing parts are disposed on the first substrate,
wherein each of the display pixels includes a pixel semiconductor layer disposed on the first substrate, a first gate electrode overlapping with the pixel semiconductor layer, and a first gate insulating layer disposed between the pixel semiconductor layer and the first gate electrode,
wherein each of the light sensing parts includes a sensing semiconductor layer disposed on the first gate insulating layer, a second gate electrode overlapping with the sensing semiconductor layer, and a second gate insulating layer disposed between the sensing semiconductor layer and the second gate electrode,
wherein the top part is configured to generate a nail image by image-picking up the nail using the light emitting parts and the light sensing parts, in conjunction with using a controller and an image analyzer, and is configured to sense a state of the finger pressing on the bottom part, based on the nail image, and wherein information from the image analyzer reflecting the state of the finger pressing on the bottom is displayed in the display area.

2. The electronic device of claim 1 ,
wherein the first substrate includes the display area and the sensing area;
wherein the display pixels are disposed in the display area, and the display pixels display an image through a display surface which is a front surface of the top part,
wherein the light emitting parts are disposed in the sensing area, and emit light onto the nail through a sensing surface which is a back surface of the top part,
wherein the light sensing parts are disposed in the sensing area, and sense reflected light through the sensing surface, and
wherein the reflected light is the light emitted from the light emitting parts and reflected by the nail.

3. The electronic device of claim 2 , wherein the display area and the sensing area do not overlap with each other.

4. The electronic device of claim 2 , wherein the display area and the sensing area overlap with each other.

5. The electronic device of claim 2 , wherein the second gate electrode blocks external light which is transmitted through the display surface, to the sensing semiconductor layer.

6. The electronic device of claim 2 , wherein
the pixel semiconductor layer includes polycrystalline Si, and
the sensing semiconductor layer includes amorphous Si—Ge.

7. The electronic device of claim 2 , wherein
a display element included in each of the display pixels includes:
a first lower electrode including a transparent conductive layer and a reflective layer;
a first emitting layer disposed on the first lower electrode; and
a first upper electrode disposed on the first emitting layer, and
a display element included in each of the light emitting parts includes:
a second lower electrode including the transparent conductive layer;
a second emitting layer disposed on the second lower electrode; and
a second upper electrode disposed on the second emitting layer.

8. The electronic device of claim 7 , wherein each of the first upper electrode and the second upper electrode is a semi-transmissive reflective layer which reflects light in an infrared region.

9. The electronic device of claim 7 , wherein
the display element included in each of the light emitting parts further includes a semi-transmissive reflective layer disposed on the second upper electrode,
wherein the semi-transmissive reflective layer overlaps with the second emitting layer, and
wherein the semi-transmissive reflective layer reflects light in an infrared region.

10. The electronic device of claim 9 , wherein the display element included in each of the light emitting parts further includes a capping layer disposed between the second upper electrode and the semi-transmissive reflective layer.

11. The electronic device of claim 2 , wherein the bottom part, in conjunction with the controller and the image analyzer, is adapted to generate a biometric image by image-picking up the fingerprint surface, and adapted to sense a heartbeat of a user, based on the biometric image.

12. The electronic device of claim 11 , wherein the bottom part includes:
a second substrate including an auxiliary area; and
additional light sensing parts disposed in the auxiliary area, wherein the additional light sensing parts sense transmitted light through an auxiliary surface which is a front surface of the bottom part,
wherein the transmitted light is the light emitted from the light emitting parts and transmitted through the finger.

13. The electronic device of claim 2 , wherein the light emitted from the light emitting parts is infrared light.

Assignees

• Samsung Display Co Ltd

Inventors

• Lim Jae Ik
• Park Won Sang

Classifications

• H10K59/65

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• A61B5/6826 Primary

  Finger · CPC title

• A61B5/0205 Primary

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• H10F39/198

  Contact-type image sensors [CIS] · CPC title

• G06V40/28

  Recognition of hand or arm movements, e.g. recognition of deaf sign language (static hand signs G06V40/113) · CPC title