Electronic device for improving performance of sensor

Patent metadata

Field	Value
Publication number	US-11474205-B2
Application number	US-202016848062-A
Country	US
Kind code	B2
Filing date	Apr 14, 2020
Priority date	Apr 15, 2019
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

An electronic device is provided. An electronic device includes a sensor, a display including a first surface and a second surface, a rear linear polarizer disposed at a front surface of the sensor module, a rear phase difference film disposed between a front surface of the rear linear polarizer and the second surface of the display, a front phase difference film disposed at the first surface of the display at a position corresponding to a location of the sensor, a front linear polarizer disposed at a front surface of the front phase difference film, and a front plate disposed at a front surface of the front linear polarizer.

First claim

What is claimed is:

1. An electronic device, comprising:
a front plate;
a sensor including an optical transmitter and an optical receiver;
a display disposed between the front plate and the sensor;
a collimator disposed between the display and the sensor;
a front phase difference film disposed between the front plate and the display; and
a front linear polarizer disposed between the front plate and the front phase difference film,
wherein an interval between the collimator and the display is smaller than an interval between the optical transmitter and the optical receiver of the sensor.

2. The electronic device of claim 1 , wherein the front phase difference film generates a phase difference of approximately λ/4 in a signal passing through the front phase difference film.

3. The electronic device of claim 1 , wherein the front linear polarizer polarizes a vibration direction of a signal passing through the front linear polarizer in a second polarization direction.

4. The electronic device of claim 1 , wherein the front linear polarizer polarizes a vibration direction of a signal passing through the front linear polarizer in a first polarization direction.

5. The electronic device of claim 1 , further comprising at least one of a first adhesive member and a second adhesive member,
wherein the first adhesive member is disposed between the display and the collimator, and
wherein the second adhesive member is disposed between the collimator and the sensor.

6. The electronic device of claim 5 , wherein the at least one of the first adhesive member and the second adhesive member has a refractive index of 1.4 to 1.6.

7. An electronic device, comprising:
a sensor;
a display including a first surface and a second surface; and
a collimator disposed between the sensor and the second surface of the display,
wherein an interval between the collimator and the display is smaller than an interval between an optical transmitter and an optical receiver included in the sensor.

8. The electronic device of claim 7 , wherein the collimator includes a plurality of transmission regions facing a direction perpendicular to the display.

9. The electronic device of claim 8 , wherein each of the plurality of transmission regions includes a first length of a first direction perpendicular to a rear surface of the display and a second length of a second direction parallel to the rear surface of the display.

10. The electronic device of claim 9 , wherein an angle at which a signal passes through each of the plurality of transmission regions is determined according to a set ratio of the first length to the second length.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Il
• Park Hyeongsoon
• Jo Jeonggyu
• Kang Dareum
• Park Chohee
• Choi Seongwoo

Classifications

• G02B27/30

  Collimators · CPC title

• H04M1/026

  Details of the structure or mounting of specific components · CPC title

• G02B5/3083

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G01S7/4811 Primary

  common to transmitter and receiver · CPC title