# US 2018/0025200 A1 · Luminescent film with quantum dots

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- Number: US 2018/0025200 A1
- Document ID: US20180025200A1
- Status: Published application
- Kind: A1
- Application number: 15/654,951
- Filed: 2017-07-20
- Published: 2018-01-25
- Earliest claimed: 2016-07-20
- Assignees: IB Korea Ltd.
- Applicants: IB Korea Ltd.
- Inventors: Frederick Frye; Douglas Loy
- Web page: https://patentgrep.com/patent/US20180025200A1

## CPC

- G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints
- B41M 3/00: Printing processes to produce particular kinds of printed work, e.g. patterns ({printing apparatus or machines of special type or for particular purposes B41F17/00;} special designs or pictures per se B44F; manufacturing printed circuits using printing techniques H05K3/12 {; manufacturing organic semiconductor devices using printing techniques H10K71/13})
- B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- H04N 1/442: {using a biometric data reading device}
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

One or more techniques and/or systems are disclosed for a luminescent film that can be used with a biometric imager, which can be used to scan biometric markers, and/or to interact with the device. Upon contacting a device surface, an image of at least a portion of the touch object can be captured and used in conjunction with identification of the user and/or for input to the device. The systems or techniques, described herein, may be integrated into a portion of a device, and may comprise a luminescent layer, comprising quantum dots, that can emit photons upon contact, and an image capture component that can generate data indicative of an image of at least a portion of the touch object.

## Claims

### Claim 1

A system for producing a relief print image, comprising:
a relief print data generation component to generate relief print data comprising an indication of light from a light emitting layer received by a sensor array, the relief print data generation component comprising:
the sensor array to convert received photons to an electrical signal indicative of the relief print data; and
the light emitting layer comprising quantum dots to provide electroluminescence, the light emitting layer operably disposed above the sensor array to emit photons from the quantum dots toward the sensor array, the photons indicative of one or more portions of a relief object disposed above the light emitting layer; and
an image generation component operably coupled with the relief print data generation component to convert the relief print data into image data indicative of a relief print image.

### Claim 2 (depends on 1)

The system of claim 1, the quantum dots comprising one or more of:
core-type quantum dots;
core-shell quantum dots; and
alloyed quantum dots.

### Claim 3 (depends on 2)

The system of claim 2:
the core-type quantum dots comprising one or more of: cadmium; zinc; indium; silicon;
germanium; cadmium sulfide (CdS); and cadmium selenide (CdSe); and
the core-shell quantum dots comprising one or more of: a cadmium selenide core with a zinc sulfide coating (CdSe—ZnS); and a copper indium sulfide core with a zinc-sulfide shell (CuInS2/ZnS).

### Claim 4 (depends on 1)

The system of claim 1, the sensor array comprising one or more of:
a photo-sensitive thin film transistor (TFT);
a thin film photo-diode;
a thin film photoconductor;
a complementary metal-oxide semiconductor (CMOS) image sensor; and
a charge-coupled device (CCD) image sensor.

### Claim 5 (depends on 1)

The system of claim 1, the relief print data generation component comprising:
a plurality of sensor arrays, respective sensor arrays operably coupled to at least one other sensor array to convert received photons to an electrical signal; and
an image stitching component to stitch together relief print image data generated from respective sensor arrays, resulting in the relief print data indicative of the relief print image.

### Claim 6 (depends on 5)

The system of claim 5, the relief print data generation component comprising a sensor array substrate adhered under respective sensor arrays.

### Claim 7 (depends on 1)

The system of claim 1, wherein the light emitting layer comprises one or more of:
one or more polarizing layers;
one or more light shielding pattern layers to direct incident light in a desired pattern toward the sensor array; and
one or more adherence layers to respective layers.

### Claim 8 (depends on 1)

The system of claim 1, the light emitting layer disposed over a substrate, and the substrate disposed over the sensor array.

### Claim 9 (depends on 1)

The system of claim 1, the relief print data generation component comprises a protective layer disposed over light emitting layer, the protective layer comprising one or more of:
an abrasion resistive layer;
a liquid resistive layer; and
a shock resistive layer.

### Claim 10

A biometric sensor device, comprising:
a luminescent layer comprising quantum dots to provide luminescence, the luminescent layer emitting photons upon contact from a biometric object; and
an image capture component disposed beneath the luminescent layer to convert at least a portion of the photons emitted into data indicative of an image comprising a representation of at least a portion of the biometric object.

### Claim 11 (depends on 10)

The device of claim 10, the quantum dots comprising one or more of:
core-type quantum dots;
core-shell quantum dots; and
alloyed quantum dots.

### Claim 12 (depends on 11)

The device of claim 11:
the core-type quantum dots comprising one or more of: cadmium; zinc; indium; silicon; germanium; cadmium sulfide (CdS); and cadmium selenide (CdSe); and
the core-shell quantum dots comprising one or more of: a cadmium selenide core with a zinc sulfide coating (CdSe—ZnS); and a copper indium sulfide core with a zinc-sulfide shell (CuInS2/ZnS).

### Claim 13 (depends on 10)

The device of claim 10, the luminescent layer disposed over at least a portion of a touch screen layer of a touch enabled device, and configured to emit photons toward the touch screen layer upon contact from the biometric object.

### Claim 14 (depends on 10)

The system of claim 10, the luminescent layer comprising an electroluminescent layer comprising the quantum dots to emit the photons in response to an electrical charge received from the biometric object.

### Claim 15 (depends on 10)

The system of claim 10, the luminescent layer comprising a dielectric layer disposed above the luminescent layer.

### Claim 16 (depends on 10)

The system of claim 10, the luminescent layer comprising a shielding layer, disposed above the luminescent layer to mitigate emission of photons from a top surface of the luminescent layer.

### Claim 17 (depends on 10)

The system of claim 10, comprising a protective layer disposed over the luminescent layer.

### Claim 18 (depends on 10)

The system of claim 10, the image capture component communicatively coupled with an image processor to generate an image representing the biometric object from the data indicative of the image.

### Claim 19

A method for manufacturing a system for producing a relief print image, comprising:
forming a relief print data generation component to generate relief print data from an indication of light emitted from electrically excited quantum dots in a light emitting layer to a sensor array, the forming comprising:
forming the light emitting layer comprising the quantum dots;
disposing the light emitting layer over the sensor array to convert the photons received from the quantum dots to an electrical signal, the light emitting layer operably disposed to emit the photons toward the sensor array that are indicative of one or more portions of a relief object disposed over the light emitting layer, the electrical signal comprising relief print data indicative of the one or more portions of a relief object; and
operably coupling an image generation component with the relief print data generation to generate relief print image data from the relief print data, the relief print image data indicative of an image of the one or more portions of a relief object.

### Claim 20 (depends on 19)

The method of claim 19, forming the light emitting layer comprising using quantum dots comprising one or more or:
core-type quantum dots comprising one or more of: cadmium; zinc; indium; silicon;
germanium; cadmium sulfide (CdS); and cadmium selenide (CdSe);
core-shell quantum dots comprising one or more of: a cadmium selenide core with a zinc sulfide coating (CdSe—ZnS); and a copper indium sulfide core with a zinc-sulfide shell (CuInS2/ZnS); and
alloyed quantum dots.