# US 12,010,898 B2 · Light emitting device with optimized light-guiding units

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- Number: US 12,010,898 B2
- Document ID: US12010898B2
- Status: Granted
- Kind: B2
- Application number: 18/108,022
- Filed: 2023-02-10
- Published: 2023-09-21
- Granted: 2024-06-11
- Earliest claimed: 2022-03-21
- Assignees: Innolux Corporation
- Applicants: InnoLux Corporation
- Inventors: Tsung-Han Tsai; Hsiao-Lang Lin
- Web page: https://patentgrep.com/patent/US12010898B2

## CPC

- H10K 59/879: {comprising refractive means, e.g. lenses}
- G02F 1/13: based on liquid crystals, e.g. single liquid crystal display cells
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 2102/331: {Nanoparticles used in non-emissive layers, e.g. in packaging layer}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- 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

## Abstract

A light emitting device has a light emitting panel and a light guiding structure. The light emitting panel has a pixel, and the pixel has a first sub-pixel. The light guiding structure is set on the light emitting panel and has a plurality of light-guiding units. From a top view direction of the light emitting device, a number N of the light-guiding units that partially overlap with the first sub-pixel satisfies a following equation: (25540(X*Y){circumflex over ( )}−1)+(173600000(X*Y){circumflex over ( )}−2)−(0.000749(X*Y){circumflex over ( )}−3)+(0.0791(X*Y){circumflex over ( )}−4)−(2.548(X*Y){circumflex over ( )}−5)−0.1085≤N≤(44027(X*Y){circumflex over ( )}−1)+(430300000(X*Y){circumflex over ( )}−2)−(0.005148(X*Y){circumflex over ( )}−3)+(0.5005(X*Y){circumflex over ( )}−4)−(15.6(X*Y){circumflex over ( )}−5)−0.00081967. Where X is a resolution of the light emitting panel in pixels per inch, and Y is a size of a single light-guiding unit in micrometer.

## Claims

### Claim 1

A light emitting device, comprising:
a light emitting panel comprising a pixel, the pixel comprising a first sub-pixel; and
a light guiding structure disposed on the light emitting panel and comprising a plurality of light guiding units;
wherein in a top view of the light emitting device, an amount of part of the light guiding units overlapping the first sub-pixel satisfies the following equation:
25540(X*Y){circumflex over ( )}−1+173600000(X*Y){circumflex over ( )}−2−0.000749(X*Y){circumflex over ( )}−3+0.0791(X*Y){circumflex over ( )}−4−2.548(X*Y){circumflex over ( )}−5−0.1085≤N≤44027(X*Y){circumflex over ( )}−1+430300000(X*Y){circumflex over ( )}−2−0.005148(X*Y){circumflex over ( )}−3+0.5005(X*Y){circumflex over ( )}−4−15.6(X*Y){circumflex over ( )}−5−0.00081967;
wherein X is a resolution of the light emitting panel in PPI, Y is a size of one of the plurality of light guiding units in micrometer, and N is the amount of the part of the light guiding units overlapping the first sub-pixel.

### Claim 2 (depends on 1)

The light emitting device as claimed in claim 1, wherein in the top view of the light emitting device, the light guiding units are in a shape of polygon, the amount of the part of the light guiding units overlapping the first sub-pixel satisfies the following equation:
23707(X*Y){circumflex over ( )}−1+231700000(X*Y){circumflex over ( )}−2−0.00277(X*Y){circumflex over ( )}−3+0.2695(X*Y){circumflex over ( )}−4−8.4(X*Y){circumflex over ( )}−5−0.000441361≤N≤44027(X*Y){circumflex over ( )}−1+430300000(X*Y){circumflex over ( )}−2−0.005148(X*Y){circumflex over ( )}−3+0.5005(X*Y){circumflex over ( )}−4−15.6(X*Y){circumflex over ( )}−5−0.00081967.

### Claim 3 (depends on 1)

The light emitting device as claimed in claim 1, wherein in a top view of the light emitting device, the light guiding units are curved profile, the amount of the part of the light guiding units overlapping the first sub-pixel satisfies the following equation:
25540(X*Y){circumflex over ( )}−1+173600000(X*Y){circumflex over ( )}−2−0.000749(X*Y){circumflex over ( )}−3+0.0791(X*Y){circumflex over ( )}−4−2.548(X*Y){circumflex over ( )}−5−0.1085≤N≤47432(X*Y){circumflex over ( )}−1+322400000(X*Y){circumflex over ( )}−2−0.001391(X*Y){circumflex over ( )}−3+0.1469(X*Y){circumflex over ( )}−4−4.732(X*Y){circumflex over ( )}−5−0.2015.

### Claim 4 (depends on 1)

The light emitting device as claimed in claim 1, further comprising a light filtering structure disposed on the light guiding structure, wherein the light filtering structure comprises a first light filtering unit overlapping the first sub-pixel.

### Claim 5 (depends on 4)

The light emitting device as claimed in claim 4, wherein the pixel further comprises a second sub-pixel, the light filtering structure further comprises a second light filtering unit overlapping the second sub-pixel, an area of the first light filtering unit is greater than an area of the second light filtering unit, and a color of the first light filtering unit is green.

### Claim 6 (depends on 5)

The light emitting device as claimed in claim 5, wherein a color of a second light filtering unit is red.

### Claim 7 (depends on 5)

The light emitting device as claimed in claim 5, wherein a color of a second light filtering unit is blue.

### Claim 8 (depends on 5)

The light emitting device as claimed in claim 5, wherein the pixel further comprises a third sub-pixel, the light filtering structure further comprises a third light filtering unit overlapping the third sub-pixel, the area of the second light filtering unit is greater than an area of the third light filtering unit, a color of the second light filtering unit is red, and a color of the third light filtering unit is blue.

### Claim 9 (depends on 4)

The light emitting device as claimed in claim 4, further comprising a light converting structure disposed between the light filtering structure and the light guiding structure.