# US 12,015,048 B2 · Display device

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- Number: US 12,015,048 B2
- Document ID: US12015048B2
- Status: Granted
- Kind: B2
- Application number: 17/570,112
- Filed: 2022-01-06
- Published: 2022-11-03
- Granted: 2024-06-18
- Earliest claimed: 2021-04-30
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Joo Woan Cho; Dae Ho Song; Tae Hee Lee; Hyung Il Jeon; Byeong Hwa Choi
- Web page: https://patentgrep.com/patent/US12015048B2

## CPC

- H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout}
- G09G 3/3225: using an active matrix
- H10W 20/20: Interconnections within wafers or substrates, e.g. through-silicon vias [TSV]
- H10W 90/00: Package configurations
- G06F 3/147: using display panels
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3241: the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
- G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element
- G09G 2300/0439: Pixel structures
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- H10D 84/80: characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00, e.g. integration of IGFETs (H10D84/40 takes precedence)
- H10H 20/8512: {Wavelength conversion materials}
- H10H 20/855: Optical field-shaping means, e.g. lenses
- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10W 72/921: {Structures or relative sizes of bond pads}
- H10W 72/923: {Bond pads having multiple stacked layers}
- H10W 72/942: {relative to underlying supporting features, e.g. bond pads, RDLs or vias}
- H10W 72/944: {Dispositions of multiple bond pads}
- H10W 72/9445: {Top-view layouts, e.g. mirror arrays}
- H10W 90/722: {between stacked chips}
- H10W 90/754: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H10W 90/794: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

A display device includes a first substrate including a display area, a non-display area, and a plurality of pixel circuit units in the display area and the non-display area, a plurality of light emitting elements on the first substrate in the display area, the plurality of light emitting elements being electrically connected to the pixel circuit units, a hole mask layer on the first substrate and including a plurality of holes corresponding to the light emitting elements, a second substrate on the hole mask layer and including a plurality of open holes corresponding to the plurality of holes, and a plurality of light exit patterns in the plurality of the open holes of the second substrate corresponding to the plurality of holes, wherein each of the light exit patterns includes a first part in one of the plurality of open holes.

## Claims

### Claim 1

A display device comprising:
a first substrate comprising a display area, a non-display area, and a plurality of pixel circuit units in the display area and the non-display area;
a plurality of light emitting elements on the first substrate in the display area, the plurality of light emitting elements being electrically connected to the pixel circuit units;
a hole mask layer on the first substrate and comprising a plurality of holes corresponding to the light emitting elements;
a second substrate on the hole mask layer and comprising a plurality of open holes corresponding to the plurality of holes; and
a plurality of light exit patterns in the plurality of open holes of the second substrate corresponding to the plurality of holes,
wherein each of the light exit patterns comprises a first part in one of the plurality of open holes and a second part protruding from an upper surface of the second substrate, wherein a refractive index of each of the light exit patterns is greater than a refractive index of the second substrate.

### Claim 2 (depends on 1)

The display device of claim 1, wherein a maximum diameter of the second part is greater than a diameter of the plurality of holes, and
wherein side surfaces of the first part that are in contact with the second substrate are inclined.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the second part has a curved outer surface.

### Claim 4 (depends on 2)

The display device of claim 2, wherein a refractive index of the second part is greater than a refractive index of the first part.

### Claim 5 (depends on 1)

The display device of claim 1, wherein the plurality of holes and the plurality of light exit patterns overlap the plurality of light emitting elements in a thickness direction of the display device.

### Claim 6 (depends on 1)

The display device of claim 1, wherein the light emitting elements emit light of a first color, and
wherein at least some of the light exit patterns comprise a colorant to block transmission of the light of the first color.

### Claim 7 (depends on 1)

The display device of claim 1, wherein the first part of each of the plurality of light exit patterns comprises wavelength conversion particles to convert a wavelength of the light of a first color emitted from the light emitting elements, and
wherein the second part of each of at least some of the plurality of light exit patterns comprise a colorant to block transmission of the light of the first color.

### Claim 8 (depends on 1)

The display device of claim 1, further comprising:
a third substrate between the hole mask layer and the first substrate; and
a plurality of color control structures between the third substrate and the light emitting elements,
wherein the plurality of color control structures overlap the light emitting elements in a thickness direction of the display device.

### Claim 9 (depends on 8)

The display device of claim 8, further comprising a plurality of color filters between the third substrate and the color control structures,
wherein a width of the color filters is greater than a diameter of the holes.

### Claim 10 (depends on 1)

The display device of claim 1, further comprising a capping layer on the second substrate,
wherein a refractive index of the capping layer is smaller than a refractive index of the first part.

### Claim 11 (depends on 10)

The display device of claim 10, wherein the refractive index of the capping layer is the same as the refractive index of the second substrate.

### Claim 12 (depends on 11)

The display device of claim 11, wherein a thickness of the capping layer is equal to or smaller than a thickness of the second part.

### Claim 13 (depends on 1)

The display device of claim 1, wherein each of the plurality of light emitting elements comprises a first semiconductor layer, an active layer on the first semiconductor layer, and a second semiconductor layer on the active layer, and
wherein the display device further comprises a third semiconductor layer on the first substrate and on a surface of which the second semiconductor layer of each of the light emitting elements is located.

### Claim 14 (depends on 13)

The display device of claim 13, wherein the second semiconductor layers of the light emitting elements are connected to each other through a base layer on the surface of the third semiconductor layer in the display area and the non-display area, and
wherein the display device comprising a plurality of first connection electrodes respectively located between the light emitting elements and the first substrate in the display area, and
wherein a plurality of second connection electrodes located between the first substrate and the base layer in the non-display area.

### Claim 15 (depends on 14)

The display device of claim 14, wherein the first substrate comprises a plurality of pixel electrodes in the display area and a plurality of common electrodes in the non-display area, and
wherein the plurality of light emitting elements are on a respective one of the pixel electrode, and the second connection electrodes are on the common electrodes.

### Claim 16

A display device comprising:
a first substrate comprising a display area and a non-display area around the display area;
a plurality of light emitting elements spaced from each other in a first direction and a second direction in the display area of the first substrate;
a plurality of common electrodes in the non-display area of the first substrate, and being around the display area;
a hole mask layer on the first substrate and comprises a plurality of holes corresponding to respective ones of the light emitting elements and spaced from each other in the first direction and the second direction;
a second substrate on the hole mask layer and comprises a plurality of open holes formed to correspond to the plurality of holes; and
a plurality of light exit patterns in the open holes and are spaced from each other in the first direction and the second direction,
wherein the light exit patterns comprise a material having a greater refractive index than the second substrate.

### Claim 17 (depends on 16)

The display device of claim 16, wherein a maximum diameter of the light exit patterns is greater than a diameter of the plurality of holes.

### Claim 18 (depends on 17)

The display device of claim 17, further comprising:
a plurality of color control structures between the first substrate and the second substrate, the plurality of color control structures corresponding to respective ones of the light emitting elements; and
a plurality of color filters corresponding to the color control structures,
wherein the color filters overlap the plurality of holes.

### Claim 19 (depends on 18)

The display device of claim 18, wherein a diameter of the color filters is greater than the diameter of the plurality of holes.

### Claim 20 (depends on 18)

The display device of claim 18, further comprising a bank layer around the color filters and extending in the first direction and the second direction.