# US 2019/0170874 A1 · Optical sensing device and optical sensing module

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- Number: US 2019/0170874 A1
- Document ID: US20190170874A1
- Status: Published application
- Kind: A1
- Application number: 15/989,139
- Filed: 2018-05-24
- Published: 2019-06-06
- Earliest claimed: 2017-12-05
- Assignees: Eminent Electronic Technology Corp. Ltd.
- Applicants: Eminent Electronic Technology Corp. Ltd.
- Inventors: Shang-Ming Hung; Yi-Yung Chen
- Web page: https://patentgrep.com/patent/US20190170874A1

## CPC

- G01S 17/86: Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders
- G01J 1/0214: {Constructional arrangements for removing stray light}
- G01J 1/0266: {Field-of-view determination; Aiming or pointing of a photometer; Adjusting alignment; Encoding angular position; Size of the measurement area; Position tracking; Photodetection involving different fields of view for a single detector}
- G01J 1/0488: {with spectral filtering}
- G01J 1/06: Restricting the angle of incident light
- G01J 1/4204: {with determination of ambient light (solar light G01J2001/4266)}
- G01J 1/4228: {arrangements with two or more detectors, e.g. for sensitivity compensation}
- G01S 7/481: Constructional features, e.g. arrangements of optical elements
- G01S 7/4813: {Housing arrangements}
- G01S 7/4816: {of receivers alone}
- G01S 17/04: Systems determining the presence of a target
- G01S 17/08: for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48)
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

An optical sensing device is provided. The optical sensing device includes a first optical sensor and a filter layer. The first optical sensor is configured to receive a first optical signal. The filter layer covers the first optical sensor, and is configured to filter out the first optical signal when the first optical signal is incident on the filter layer at an incident angle not within a specific range.

## Claims

### Claim 1

An optical sensing device comprising:
a first optical sensor, configured to receive a first optical signal; and
a filter layer, wherein the filter layer covers the first optical sensor and is configured to filter out the first optical signal when the first optical is incident on the filter layer at an incident angle not within a specific range.

### Claim 2 (depends on 1)

The optical sensing device of claim 1, wherein the first optical sensor is a proximity sensor.

### Claim 3 (depends on 1)

The optical sensing device of claim 1, wherein the first optical sensor is an infrared light sensor.

### Claim 4 (depends on 1)

The optical sensing device of claim 1, further comprising:
a second optical sensor, configured to sense a second optical signal, wherein the first optical signal and the second optical signal are different.

### Claim 5 (depends on 4)

The optical sensing device of claim 4, wherein the second optical sensor is an ambient light sensor.

### Claim 6 (depends on 1)

The optical sensing device of claim 1, wherein a material of the filter layer comprises at least one of Silicon dioxide, Titanium dioxide and Tantalum pentoxide.

### Claim 7

An optical sensing module, comprising:
a circuit board;
a light source, displaced on the circuit board, wherein the light source is configured to emit a first optical signal; and
an optical sensing device, displaced on the circuit board, wherein the optical sensing device comprises:
a first optical sensor, configured to sense the first optical signal reflected by an object to be sensed; and
a filter layer, wherein the filter layer covers the first optical sensor, and is configured to filter out the first optical signal when the first optical signal is incident on the filter layer at an incident angle not within a specific range.

### Claim 8 (depends on 7)

The optical sensing module of claim 7, wherein the first optical sensor is a proximity sensor.

### Claim 9 (depends on 7)

The optical sensing module of claim 7, wherein the first optical sensor is an infrared light sensor.

### Claim 10 (depends on 7)

The optical sensing module of claim 7, further comprising:
a second optical sensor, configured to sense a second optical signal, wherein the first optical signal and the second optical signal are different.

### Claim 11 (depends on 10)

The optical sensing module of claim 10, wherein the second optical sensor is an ambient light sensor.

### Claim 12 (depends on 10)

The optical sensing module of claim 10, wherein the light source is an infrared light diode.

### Claim 13 (depends on 7)

The optical sensing module of claim 7, wherein a material of the filter layer comprises at least one of Silicon dioxide, Titanium dioxide and Tantalum pentoxide.