# US 11,898,744 B2 · Quantum structure thin film and quantum structure light-emitting module including the same

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- Number: US 11,898,744 B2
- Document ID: US11898744B2
- Status: Granted
- Kind: B2
- Application number: 17/338,257
- Filed: 2021-06-03
- Published: 2021-09-16
- Granted: 2024-02-13
- Earliest claimed: 2016-09-13
- Assignees: Sic Technology Co., Ltd.
- Applicants: SIC Technology CO. LTD
- Inventors: Shien-Tsung Wu
- Web page: https://patentgrep.com/patent/US11898744B2

## CPC

- F21V 9/32: characterised by the arrangement of the photoluminescent material
- F21V 31/005: {Sealing arrangements therefor}
- G02B 6/005: {provided by one optical element, or plurality thereof, placed on the light output side of the light guide}
- G02B 6/0051: {Diffusing sheet or layer}
- G02B 6/0055: {Reflecting element, sheet or layer}
- G02F 1/133603: {with LEDs}
- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light}
- G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell}
- F21Y 2115/10: Light-emitting diodes [LED]
- G02F 2202/36: Micro- or nanomaterials
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A quantum structure thin film includes an excitation layer, a first substrate and a second substrate. The excitation layer includes a plurality of quantum structures which are one of quantum dots and quantum rods, and which are made of one of cesium lead halide and organic ammonium lead halide. The first substrate and the second substrate are respectively disposed on two opposite sides of the excitation layer. One of the first substrate and the second substrate includes an inner layer, a buffer layer, and an outer layer that are sequentially disposed on the excitation layer in such order. Also disclosed herein is a quantum structure light-emitting module including the quantum structure thin film.

## Claims

### Claim 1

A quantum structure light-emitting module, comprising:
a quantum structure thin film which includes:
an excitation layer including a plurality of quantum structures, said quantum structures being one of quantum dots and quantum rods, and being made of one of cesium lead halide and organic ammonium lead halide, and
a first substrate and a second substrate that are respectively disposed on two opposite sides of said excitation layer, wherein one of said first substrate and said second substrate includes an inner layer, a buffer layer, and an outer layer that are sequentially disposed on said excitation layer in such order;
a light-emitting unit that is spaced apart from said quantum structure thin film, and that includes a first light-emitting element emitting a blue light and a second light-emitting element emitting a red light, wherein the blue light emitted from said first light-emitting element and the red light emitted from said second light-emitting element pass through said first substrate and enter said excitation layer, the blue light exciting said quantum structures to emit a green light, and the blue light, the red light and the green light being mixed and exiting through said second substrate, and said first substrate has an incident surface opposite to said excitation layer and said second substrate has a light-exiting surface opposite to said excitation layer;
a light guide plate disposed on a side of said incident surface of said first substrate, said light guide plate having a light exiting light guide surface facing said incident surface of said first substrate, a reflection light guide surface opposite to said light exiting light guide surface, and an incident light guide surface interconnecting said light exiting light guide surface and said reflection light guide surface, said first light-emitting element and said second light-emitting element facing said incident light guide surface; and
a reflective sheet that is disposed on said reflection light guide surface of said light guide plate, and a green phosphor disposed on said reflective sheet.

### Claim 2 (depends on 1)

The quantum structure light-emitting module of claim 1, wherein said quantum structure thin film further includes at least one water resistance unit that is disposed between said excitation layer and one of said first substrate and said second substrate, said at least one water resistance unit including a water resistance layer that is made of an organic material and an inorganic material and that is moisture impermeable.

### Claim 3 (depends on 1)

The quantum structure light-emitting module of claim 1, wherein the other one of said first substrate and said second substrate includes an inner layer, a buffer layer, and an outer layer that are sequentially disposed on said excitation layer in such order.

### Claim 4 (depends on 1)

The quantum structure light-emitting module of claim 1, wherein said second light-emitting element is a red light-emitting diode including potassium fluorosilicate phosphor.

### Claim 5 (depends on 4)

The quantum structure light-emitting module of claim 4, wherein said quantum structures are quantum dots, each with a dimension ranging from 9 nm to 13 nm.

### Claim 6 (depends on 5)

The quantum structure light-emitting module of claim 5, wherein the green light emitted from said quantum structures has a dominant wavelength ranging from 520 nm to 540 nm.

### Claim 7 (depends on 1)

The quantum structure light-emitting module of claim 1, wherein said first substrate is formed with a plurality of first microstructures opposite to said excitation layer.

### Claim 8 (depends on 1)

The quantum structure light-emitting module of claim 1, wherein said second substrate is formed with a plurality of second microstructures opposite to said excitation layer.

### Claim 9 (depends on 1)

The quantum structure light-emitting module of claim 1, further comprising a diffusion sheet disposed between said light guide plate and said quantum structure thin film, said diffusion sheet having a haze that is larger than 60%.

### Claim 10

A quantum structure light-emitting module, comprising:
a quantum structure thin film, said quantum structure thin film having a multi-layered structure which includes:
an excitation layer including a plurality of quantum structures, said quantum structures being one of quantum dots and quantum rods, and being made of one of cesium lead halide and organic ammonium lead halide, and
a first substrate and a second substrate that are respectively disposed on two opposite sides of said excitation layer, said first substrate having an incident surface opposite to said excitation layer, and said second substrate having a light exiting surface opposite to said excitation layer;
a light-emitting unit that is spaced apart from said quantum structure thin film, and that includes a first light-emitting element emitting a blue light and a second light-emitting element emitting a red light, wherein the blue light emitted from said first light-emitting element and the red light emitted from said second light-emitting element pass through said first substrate and enter said excitation layer, the blue light exciting said quantum structures to emit a green light, and the blue light, the red light and the green light being mixed and exiting from said second substrate;
a light guide plate disposed on a side of said incident surface;
a reflective sheet disposed on a side of said light guide plate opposite to said quantum structure thin film; and
a green phosphor disposed on said reflective sheet.

### Claim 11 (depends on 10)

The quantum structure light-emitting module of claim 10, further comprising a diffusion sheet disposed between said light-emitting unit and said quantum structure thin film, said diffusion sheet having a haze value larger than 60%, and wherein said quantum structure thin film further includes at least one water resistance unit that is disposed between said excitation layer and one of said first substrate and said second substrate, said at least one water resistance unit including a water resistance layer that is made of an organic material and an inorganic material and that is moisture impermeable.

### Claim 12 (depends on 10)

The quantum structure light-emitting module of claim 10, wherein one of said first substrate and said second substrate includes an inner layer, a buffer layer, and an outer layer that are sequentially disposed on said excitation layer in such order.

### Claim 13 (depends on 12)

The quantum structure light-emitting module of claim 12, wherein the other one of said first substrate and said second substrate includes an inner layer, a buffer layer, and an outer layer that are sequentially disposed on said excitation layer in such order.

### Claim 14 (depends on 10)

The quantum structure light-emitting module of claim 10, wherein said first substrate is formed with a plurality of first microstructures opposite to said excitation layer.

### Claim 15 (depends on 14)

The quantum structure light-emitting module of claim 14, wherein said second substrate is formed with a plurality of second microstructures opposite to said excitation layer.

### Claim 16 (depends on 10)

The quantum structure light-emitting module of claim 10, wherein said second light-emitting element emitting the red light includes potassium fluorosilicate phosphor.

### Claim 17 (depends on 10)

The quantum structure light-emitting module of claim 10, wherein said quantum structures are quantum dots, each with a dimension ranging from 9 nm to 13 nm.

### Claim 18 (depends on 10)

The quantum structure light-emitting module of claim 10, wherein the green light emitted from said quantum structures has a dominant wavelength ranging from 520 nm to 540 nm.