# US 10,371,880 B2 · Display device and method for fabricating the same

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- Number: US 10,371,880 B2
- Document ID: US10371880B2
- Status: Granted
- Kind: B2
- Application number: 15/463,004
- Filed: 2017-03-20
- Published: 2017-09-28
- Granted: 2019-08-06
- Earliest claimed: 2016-03-24
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Chan-jae Park; Taeho Lee; Hyun-hwa Song; Seunghwan Baek
- Web page: https://patentgrep.com/patent/US10371880B2

## CPC

- G02B 6/005: {provided by one optical element, or plurality thereof, placed on the light output side of the light guide}
- G02B 6/0023: {provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source}
- G02B 6/0026: {Wavelength selective element, sheet or layer, e.g. filter or grating}
- G02B 6/0051: {Diffusing sheet or layer}
- G02B 6/0056: {for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements}
- G02B 6/0083: {Details of electrical connections of light sources to drivers, circuit boards, or the like}
- Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

A display device includes a backlight unit and a display panel disposed on the backlight unit. The backlight unit includes a light source unit and an optical unit disposed between the light source unit and the display panel. The optical unit includes an alignment layer, quantum rods disposed on the alignment layer, and an accommodation part configured to accommodate the alignment layer and the quantum rods.

## Claims

### Claim 1

A display device, comprising:
a backlight unit; and
a display panel disposed on the backlight unit,
wherein the backlight unit comprises:
a light source unit; and
an optical unit disposed between the light source unit and the display panel,
wherein the optical unit comprises:
an alignment layer;
quantum rods disposed on the alignment layer, wherein each of the quantum rods has a long axis and a short axis crossing the long axis and the quantum rods are aligned using grooves in the alignment layer extending in a first direction corresponding to the long axis of each of the quantum rods, the grooves being spaced apart from each other in a second direction corresponding to the short axis of each of the quantum rods; and
an accommodation part configured to accommodate the alignment layer and the quantum rods.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the accommodation part comprises an accommodation groove configured to accommodate the alignment layer and the quantum rods.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the accommodation part further comprises:
a bottom portion; and
a side portion connected to the bottom portion,
wherein the accommodation groove is defined by the bottom portion and the side portion, and
the alignment layer and the quantum rods are disposed on the bottom portion.

### Claim 4 (depends on 1)

The display device of claim 1, wherein the optical unit further comprises:
a cover part disposed on the accommodation part; and
frit configured to connect the accommodation part to the cover part.

### Claim 5 (depends on 1)

The display device of claim 1, wherein the light source unit emits blue light, and
the quantum rods comprise:
first quantum rods configured to receive the blue light and emit red light; and
second quantum rods configured to receive the blue light and emit green light.

### Claim 6 (depends on 1)

The display device of claim 1, wherein the backlight unit further comprises a light guide plate configured to receive light from the light source unit,
the light source unit is disposed on a side surface of the light guide plate, and
the optical unit is disposed between the light guide plate and the display panel.

### Claim 7 (depends on 1)

The display device of claim 1, wherein the backlight unit further comprises a light guide plate configured to receive light from the light source unit,
the light source unit is disposed on a side surface of the light guide plate, and
the optical unit is disposed between the light source unit and the light guide plate.

### Claim 8 (depends on 1)

The display device of claim 1, wherein the backlight unit further comprises a diffusion plate configured to receive light from the light source unit,
the light source unit is disposed below the diffusion plate, and
the optical unit is disposed between the light source unit and the diffusion plate.

### Claim 9 (depends on 1)

The display device of claim 1, Wherein the light source unit comprises:
a circuit board; and
a light source disposed on the circuit hoard,
the backlight unit further comprises a connection part connecting the circuit hoard to the optical unit, and
the optical unit is disposed on the light source.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the optical unit further comprises frit configured to connect the accommodation part to the display panel.

### Claim 11 (depends on 1)

The display device of claim 1, wherein each of the quantum rods comprises:
a core; and
a shell surrounding the core.

### Claim 12 (depends on 1)

The display device of claim 1, wherein each of the quantum rods converts a wavelength band of light provided from the light source unit, and linearly polarizes the light.

### Claim 13

A display device, comprising:
a backlight unit; and
a display panel disposed on the backlight unit,
wherein the backlight unit comprises:
a light source unit; and
an optical unit disposed between the light source unit and the display panel,
wherein the optical unit comprises:
an alignment layer having grooves extending in a first direction and aligned in the first direction, wherein the grooves are separated from each other in a second direction crossing the first direction;
quantum rods disposed on the grooves; and
an accommodation part storing the alignment layer and the quantum rods.

### Claim 14 (depends on 13)

The display device of claim 13, wherein long axes of the grooves extend substantially parallel to the first direction.

### Claim 15 (depends on 13)

The display device of claim 13, wherein the quantum rods comprise first quantum rods and second quantum rods,
wherein the first quantum rods emit light of a first color when exposed to light of a second color, and the second quantum rods emit light of a third color when exposed to the light of the second color, wherein the first, second and third colors are different from each other, and the light source unit emits the light of the second color.