Optical module, manufacturing process thereof and electronic device comprising the same

Patent metadata

Field	Value
Publication number	US-2016013223-A1
Application number	US-201514795613-A
Country	US
Kind code	A1
Filing date	Jul 9, 2015
Priority date	Jul 9, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

The present disclosure relates to an optical module. In an embodiment, the optical module includes a carrier, a light source, a light detector, and a first polarizer. The light source and the light detector are disposed adjacent to a first surface of the carrier. The first polarizer is disposed on the light detector. The optical module is configured to polarize light emitted from the light source into a first polarization direction substantially perpendicular to a second polarization direction of light permitted through the first polarizer.

First claim

What is claimed is:

1 . An optical module, comprising:
a carrier having a first surface; a light source disposed adjacent to the first surface; a light detector disposed adjacent to the first surface; and a first polarizer disposed on the light detector; wherein the optical module is configured to polarize light emitted from the light source into a first polarization direction substantially perpendicular to a second polarization direction of light permitted through the first polarizer.

2 . The optical module of claim 1 , wherein the light source is a vertical-cavity surface-emitting laser.

3 . The optical module of claim 1 , further comprising a second polarizer disposed on the light source, wherein the second polarizer is configured to polarize the light emitted from the light source into the first polarization direction.

4 . The optical module of claim 3 , wherein the light source comprises one or more light emitting areas, and the second polarizer covers at least one light emitting area.

5 . The optical module of claim 1 , wherein the light detector comprises one or more photosensitive areas, and the first polarizer covers at least one photosensitive area.

6 . The optical module of claim 1 , wherein the light detector has an upper surface and the first polarizer and the light source are disposed adjacent to the upper surface, and are spaced apart from each other.

7 . The optical module of claim 1 , wherein the light detector comprises a photosensitive area, and the first polarizer covers substantially all of the photosensitive area.

8 . The optical module of claim 1 , further comprising a second polarizer disposed on the light source, wherein the light source comprises a light emitting area and the second polarizer covers the light emitting area.

9 . An electronic device, comprising:
an optical module, comprising:
a carrier having a first surface;
a light source disposed adjacent to the first surface;
a light detector disposed adjacent to the first surface; and
a first polarizer disposed on the light detector;
wherein the optical module is configured to polarize light emitted from the light source into a first polarization direction substantially perpendicular to a second polarization direction of light permitted through the first polarizer; and
a transparent sheet, having a first surface and a second surface opposite to the first surface, the first surface of the transparent sheet facing the first surface of the carrier.

10 . The electronic device of claim 9 , wherein one of the first surface and the second surface of the transparent sheet comprises a 1/4λ waveplate.

11 . The electronic device of claim 9 , wherein the optical module is further configured to polarize the light emitted from the light source in a first polarization state, and the transparent sheet is configured to transform the light in the first polarization state into light in a second polarization state.

12 . The electronic device of claim 11 , wherein the first polarization state is a linear polarization and the second polarization state is a circular polarization.

13 . The electronic device of claim 11 , wherein the second surface of the transparent sheet comprises a 1/4λ waveplate.

14 . The electronic device of claim 11 , wherein the transparent sheet is further configured to transform light in a third polarization state into light in a fourth polarization state.

15 . The electronic device of claim 14 , wherein the third polarization state is a circular polarization and the fourth polarization state is a linear polarization.

16 . The electronic device of claim 14 , wherein light in the fourth polarization state has a polarization direction substantially perpendicular to a polarization direction of light in the first polarization state.

17 . A process of manufacturing an optical module, comprising:
providing a carrier, the carrier having a first surface; disposing a light source structure adjacent to the first surface, the light source structure configured to emit light in a first polarization direction; and disposing a light detection structure adjacent to the first surface, the light detection structure configured to admit light in a second polarization direction; wherein the first polarization direction is substantially perpendicular to the second polarization direction.

18 . The process of claim 17 , wherein the light source structure comprises a light source and a first polarizer, and disposing the light source structure comprises disposing the light source adjacent to the first surface and disposing the first polarizer on the light source.

19 . The process of claim 18 , wherein the light source comprises one or more light emitting areas, and the second polarizer covers at least one light emitting area.

20 . The process of claim 18 , wherein the light detection structure comprises a light detector and a second polarizer, and disposing the light detection structure comprises disposing the light detector adjacent to the first surface and disposing the second polarizer on the light detector, and wherein the light detector comprises at least one photosensitive area, and the second polarizer is disposed adjacent to the at least one photosensitive area.

Assignees

• Advanced Semiconductor Eng

Inventors

• Chang Jung-Hsuan
• Chen Ying-Chung

Classifications

• H01S5/18355

  having a defined polarisation · CPC title

• G01S17/04

  Systems determining the presence of a target · CPC title

• G01S7/499

  using polarisation effects · CPC title

• G01S7/4813 Primary

  Housing arrangements · CPC title

• H10F39/107

  having multiple elements covered by H10F30/00 in a repetitive configuration, e.g. radiation detectors comprising photodiode arrays · CPC title