# US 11,906,355 B1 · In-cell optical sensing display panel

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- Number: US 11,906,355 B1
- Document ID: US11906355B1
- Status: Granted
- Kind: B1
- Application number: 18/162,687
- Filed: 2023-01-31
- Granted: 2024-02-20
- Earliest claimed: 2023-01-31
- Assignees: Novatek Microelectronics Corp.
- Applicants: Novatek Microelectronics Corp.
- Inventors: Yu-Ying Tang; Yao Chung Chang; Chih-Chang Lai
- Web page: https://patentgrep.com/patent/US11906355B1

## CPC

- G01J 1/44: Electric circuits {(for command of an exposure part G03B7/02)}
- G01J 1/0209: {Monolithic}
- 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 1/4204: {with determination of ambient light (solar light G01J2001/4266)}
- G01J 1/4228: {arrangements with two or more detectors, e.g. for sensitivity compensation}
- G02F 1/13338: {Input devices, e.g. touch panels}
- G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing}
- H10K 39/34: integrated with organic light-emitting diodes [OLED]
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- G01J 2001/446: {Photodiode}
- G01J 2001/448: {Array [CCD]}
- H10K 59/125: including organic TFTs [OTFT]
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/40: OLEDs integrated with touch screens
- 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)
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An in-cell optical sensing display panel includes a pixel array, a plurality of first optical sensors and a plurality of second optical sensors. The pixel array is disposed in an active area of the in-cell optical sensing display panel, and the active area includes a first region and a second region which surrounds the first region. The sensor array is disposed in the first region of the active area and is configured to sense a fingerprint of a finger touching a surface of the in-cell optical sensing display panel. The second optical sensors are disposed in the second region of the active area and are configured to sense ambient light, and the second optical sensors are not to be used for fingerprint sensing.

## Claims

### Claim 1

An in-cell optical sensing display panel, comprising:
a pixel array disposed in an active area of the in-cell optical sensing display panel, wherein the active area comprises a first region and a second region, and the second region surrounds the first region;
a sensor array, disposed in the first region of the active area, comprising a plurality of first optical sensors and configured to sense a fingerprint of a finger touching a surface of the in-cell optical sensing display panel; and
a plurality of second optical sensors, disposed in the second region of the active area and configured to sense ambient light and not to be used for fingerprint sensing.

### Claim 2 (depends on 1)

The in-cell optical sensing display panel of claim 1, wherein each of the second optical sensors comprises a plurality of sensing elements, and an occupied area of each of the plurality of sensing elements is same as an occupied area of one of the first optical sensors.

### Claim 3 (depends on 2)

The in-cell optical sensing display panel of claim 2, wherein
the sensing elements are divided into a plurality of sensing groups electrically connected to each other in parallel, and
sensing elements in each of the sensing groups are electrically connected to each other in series.

### Claim 4 (depends on 1)

The in-cell optical sensing display panel of claim 1, further comprising:
a non-active area where no display pixel is disposed and no second optical sensor is disposed.

### Claim 5 (depends on 1)

The in-cell optical sensing display panel of claim 1, further comprising:
an optical sensing layer, comprising the first optical sensors and the second optical sensors; and
a black matrix layer, comprising a plurality of first openings and a plurality of second openings,
wherein each of the first openings corresponds to a corresponding one of the first optical sensors and overlaps an area of the corresponding one of the first optical sensors, each of the second openings corresponds to a corresponding one of the second optical sensors and overlaps an area of the corresponding one of the second optical sensors, and a width of each of the second openings is greater than a width of each of the first openings.

### Claim 6 (depends on 5)

The in-cell optical sensing display panel of claim 5, further comprising:
a touch sensing layer, comprising a plurality of third openings and a plurality of fourth openings, wherein the third openings overlap the first openings, and the fourth openings overlap the second openings, and
a width of each of the fourth openings is greater than a width of each of the third openings.

### Claim 7 (depends on 1)

The in-cell optical sensing display panel of claim 1, further comprising:
an optical sensing layer, comprising the first optical sensors and the second optical sensors; and
a black matrix layer, comprising a plurality of first openings and a plurality of second openings, wherein each of the first openings overlaps an area of a corresponding one of the first optical sensors, and each of the second openings overlaps an area of a corresponding one of the second optical sensors,
wherein a horizontal distance between a central point of each of the second openings and a central point of the area of the corresponding one of the second optical sensors is greater than a horizontal distance between a central point of the each of the first openings and a central point of the area of the corresponding one of the first optical sensors.

### Claim 8 (depends on 7)

The in-cell optical sensing display panel of claim 7, further comprising:
a touch sensing layer, comprising a plurality of third openings and a plurality of fourth openings, wherein the third openings overlap the first openings, and the fourth openings overlap the second openings, and
wherein a horizontal distance between a central point of each of the fourth openings and a central point of the area of the corresponding one of the second optical sensors is greater than a horizontal distance between a central point of the each of the third openings and a central point of the area of the corresponding one of the first optical sensors.

### Claim 9 (depends on 1)

The in-cell optical sensing display panel of claim 1, further comprising:
an optical sensing layer, comprising the first optical sensors and the second optical sensors; and
a black matrix layer, comprising a plurality of first openings and a plurality of second openings, wherein each of the first openings overlaps an area of a corresponding one of the first optical sensors, and each of the second openings overlaps an area of a corresponding one of the second optical sensors, and
wherein a position of each of the second openings is relative to a position of each of the corresponding one of the second optical sensors, such that a field of view of the corresponding one of the second optical sensors is inclined toward an edge of the in-cell optical sensing display panel.

### Claim 10 (depends on 9)

The in-cell optical sensing display panel of claim 9, further comprising:
a touch sensing layer, comprising a plurality of third openings and a plurality of fourth openings, wherein the third openings overlap the first openings, and the fourth openings overlap the second openings, and
wherein a position of each of the fourth opening is relative to a position of each of the corresponding one of the second optical sensors, such that a field of view of the corresponding one of the second optical sensors is inclined toward an edge of the in-cell optical sensing display panel.

### Claim 11 (depends on 1)

The in-cell optical sensing display panel of claim 1, wherein
the in-cell optical sensing display panel is a liquid crystal display (LCD) panel.

### Claim 12 (depends on 1)

The in-cell optical sensing display panel of claim 1, wherein
the in-cell optical sensing display panel is an organic light-emitting diode (OLED) panel.