# US 11,444,114 B2 · Image detector with photosensitive pixel array

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- Number: US 11,444,114 B2
- Document ID: US11444114B2
- Status: Granted
- Kind: B2
- Application number: 16/987,645
- Filed: 2020-08-07
- Published: 2021-07-22
- Granted: 2022-09-13
- Earliest claimed: 2020-01-21
- Assignees: Iray Technology Company Limited
- Applicants: Iray Technology Company Limited
- Inventors: Zhongshou Huang; Tieer Gu
- Web page: https://patentgrep.com/patent/US11444114B2

## CPC

- H10F 39/8057: {Optical shielding}
- G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing}
- H04N 25/76: Addressed sensors, e.g. MOS or CMOS sensors
- H04N 25/778: comprising amplifiers shared between a plurality of pixels, i.e. at least one part of the amplifier must be on the sensor array itself
- H10F 39/806: {Optical elements or arrangements associated with the image sensors}
- H10F 39/8063: {Microlenses}
- H10K 59/65: OLEDs integrated with inorganic image sensors
- H10F 39/1898: {Indirect radiation image sensors, e.g. using luminescent members}
- H10F 39/198: {Contact-type image sensors [CIS]}
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An image detector comprises a plurality of photosensitive pixels that each pixel includes a photoelectric conversion layer and a light shielding layer overlapped each other. A plurality of openings are made on the light shielding layer in a manner that its light passing area is substantially proportional to a distance from the opening to a border of the pixel.

## Claims

### Claim 1

An image detector, comprising: a pixel array comprising a plurality of photosensitive pixels,
wherein each of the plurality of photosensitive pixels comprises:
a photoelectric conversion layer configured to convert incident light into signal charges; and
a light shielding layer positioned at a side of the photoelectric conversion layer close to a light incident surface and comprising a plurality of openings to pass the incident light to the photoelectric conversion layer,
wherein each of the plurality of openings has its light-passing area substantially proportional to a distance from the opening to a border of the photosensitive pixel.

### Claim 2 (depends on 1)

The image detector according to claim 1, wherein each of the plurality of photosensitive pixels further comprises a lens array comprising a plurality of convex lenses and positioned at a side of the light shielding layer close to the light incident surface, and
wherein each of the plurality of convex lenses is paired with one of the plurality of openings, and has its optical axis passing through the paired opening and perpendicular to the photoelectric conversion layer.

### Claim 3 (depends on 2)

The image detector according to claim 2, wherein the plurality of openings comprises a central opening surrounded by at least one ring-shaped opening;
wherein the plurality of convex lenses comprises a central convex lens surrounded by at least one ring-shaped convex lens.

### Claim 4 (depends on 2)

The image detector according to claim 2, further comprising:
a light emitting panel positioned at a side of the lens array close to the light incident surface and configured to provide illumination for the image detector.

### Claim 5 (depends on 4)

The image detector according to claim 4, wherein the light emitting panel comprises a visible light display panel configured to illuminate a flat or three-dimensional object to be captured by the image detector.

### Claim 6 (depends on 5)

The image detector according to claim 5, wherein the visible light display panel includes an Organic Light-Emitting Diode (OLED) display.

### Claim 7 (depends on 4)

The image detector according to claim 4, wherein the light emitting panel comprises a radiation conversion layer configured to convert radiation into visible light.

### Claim 8 (depends on 7)

The image detector according to claim 7, wherein the radiation conversion layer comprises a scintillator film or a scintillator crystal.

### Claim 9 (depends on 4)

The image detector according to claim 4, wherein each of the plurality of convex lenses has its diameter DH, which satisfies: 0.8DX<DH<1.5DX, where
DX
=
2
·
Z
2
·
X
m
Z
1
+
R
m
,
and Z1 represents a distance from center of the convex lens to the light emitting panel, Z2 represents a distance from a center of the convex lens to the light shielding layer, Rm represents a curvature radius of the convex lens, and Xm represents a distance from the center of the convex lens to an edge of the photosensitive pixel.

### Claim 10 (depends on 1)

The image detector according to claim 1, wherein each of the plurality of photosensitive pixels further comprises an amplification circuit configured to amplify the signal charges and to output the amplified signal charges to an external circuit; and
wherein the amplification circuit comprises an amplification transistor, a reset transistor, and an output transistor.