Patent · US11978678B2 · B2 · US

Display device

(11) Publication number

US11978678B2

(21) Application number

17/817,715

(22) Filing date

2022-08-05

(30) Priority date

2016-06-14

(43) Publication date

2024-05-07

(45) Date of grant

2024-05-07

(51) IPC

B65G 43/08; G01R 31/26; G09G 3/32; H01L 21/288; H01L 21/66; H01L 21/67; H01L 25/075; H01L 25/16; H01L 27/12; H01L 33/00; H01L 33/38; H01L 33/50; H01L 33/62

(52) CPC

H10P Generic processes or apparatus for the manufacture or treatment of devices covered by class H10: 74/23, 14/46, 72/0446, 74/207
B65G Transport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors: 43/08
G01R Measuring electric variables; measuring magnetic variables: 31/26
G09G Arrangements or circuits for control of indicating devices using static means to present variable information: 2300/0426, 3/32
H01L Semiconductor devices; electric solid state devices not otherwise provided for: 21/288, 21/67144, 22/14, 22/20, 25/0753, 25/167, 27/124, 27/1248, 27/1255, 27/1259, 27/1262, 2933/0066, 33/0093, 33/38, 33/50, 33/505, 33/62
H10D Inorganic electric semiconductor devices: 86/021, 86/0212, 86/0221, 86/441, 86/451, 86/471, 86/481, 86/60
H10H Inorganic light-emitting semiconductor devices having potential barriers: 20/01, 20/018, 20/0364, 20/831, 20/84, 20/851, 20/8514, 20/8515, 20/855, 20/857
H10W Generic packages, interconnections, connectors or other constructional details of devices covered by class H10: 90/00

(73) Assignee

Innolux Corp

(72) Inventors

Tung-Kai Liu; Tsau-Hua Hsieh; Wei-Cheng Chu; Chun-Hsien Lin; Chandra LIUS; Ting-Kai Hung; Kuan-Feng LEE; Ming-Chang Lin; Tzu-Min Yan; Hui-Chieh Wang

(54) Title

Display device

(57) Abstract

A display device includes a first substrate, a light-emitting element, a light conversion layer, and a color filter layer. The light-emitting element is disposed on the first substrate. The light conversion layer is disposed on the light-emitting element. In addition, the color filter layer is overlapped the light-emitting element and the light conversion layer.

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Claims (8)

A display device, comprising: a first substrate; a light-emitting diode disposed on the first substrate; a light conversion layer disposed on the light-emitting diode; a color filter layer disposed on the light-emitting diode and the light conversion layer, wherein a width of the color filter layer is greater than a width of the light conversion layer; an insulating layer disposed on the first substrate and having a recess, wherein the light-emitting diode is disposed in the recess of the insulating layer; a light-shielding layer disposed on the insulating layer and having a recess, wherein in a cross-sectional view of the display device, the recess of the light-shielding layer comprises a first width and a second width, the first width is closer to the first substrate than the second width and the first width of the recess of the light-shielding layer is different from the second width of the recess of the light-shielding layer; and a second substrate opposite to the first substrate; wherein the recess of the light-shielding layer is overlapped with the recess of the insulating layer, wherein in the cross-sectional view of the display device, the recess of the insulating layer has a minimum width, the recess of the light-shielding layer has a minimum width, the minimum width of the recess of the light-shielding layer is the first width of the recess of the light-shielding layer, and the minimum width of the recess of the insulating layer is less than the minimum width of the recess of the light-shielding layer.
The display device of claim 1, wherein the light conversion layer, the color filter layer overlaps with the recess of the insulating layer.
The display device of claim 2, wherein the width of the light conversion layer is greater than the minimum width of the recess of the insulating layer.
The display device of claim 1, wherein the light-shielding layer is disposed between the first substrate and the second substrate, wherein the color filter layer is disposed in the recess of the light-shielding layer.
The display device of claim 4, the second width of the recess of the light-shielding layer is greater than the minimum width of the recess of the insulating layer.
The display device of claim 1, wherein the display device comprises a light-shielding region and a non-light-shielding region adjacent to the light-shielding region, the color filter layer is disposed in the non-light-shielding region, and a transistor is disposed in the light-shielding region.
The display device of claim 1, further comprising a conductive layer disposed on the insulating layer, wherein the light-emitting diode is disposed on the insulating layer and the conductive layer is electrically connected to an upper electrode of the light-emitting diode.
The display device of claim 1, further comprising a thin film transistor electrically connected to the light-emitting diode.

Description

The invention relates to display devices, and in particular to a display device with light-emitting elements.

As digital technology develops, display devices are being used more widely in many aspects of daily life, such as in televisions, notebook computers, computers, cell phones, smartphones, and other modern information devices. Also, display devices are continuously being developed to be lighter, thinner, smaller and more fashionable than previous generations. These display devices include light-emitting diode display devices.

Light-emitting diodes (LEDs) generate electromagnetic radiation (for example, light) by applying the recombination of an electron-hole pair in a p-n junction. In a forward bias p-n junction formed of direct band gap material such as GaAs or GaN, electromagnetic radiation is generated by the recombination of electron-hole pairs pouring into a depletion region. The electromagnetic radiation may be in the visible light region or the invisible light region, and LEDs of different colors are formed of materials with different energy gaps.

Nowadays, LEDs for the display device industry are trending towards mass production, and any reduction in the production cost of LED display devices may bring a significant beneficial economic effect. However, existing display devices are not satisfactory in every aspect.

Therefore, a display device that can increase display quality or reduce the production cost is still required in the industry.

Citations (3)

US20060012288A1
US20120008065A1
US20160223863A1

Record as JSON

{
  "publication_number": "US11978678B2",
  "country": "US",
  "kind": "B2",
  "title": "Display device",
  "abstract": "A display device includes a first substrate, a light-emitting element, a light conversion layer, and a color filter layer. The light-emitting element is disposed on the first substrate. The light conversion layer is disposed on the light-emitting element. In addition, the color filter layer is overlapped the light-emitting element and the light conversion layer.",
  "claims": [
    "1. A display device, comprising: a first substrate; a light-emitting diode disposed on the first substrate; a light conversion layer disposed on the light-emitting diode; a color filter layer disposed on the light-emitting diode and the light conversion layer, wherein a width of the color filter layer is greater than a width of the light conversion layer; an insulating layer disposed on the first substrate and having a recess, wherein the light-emitting diode is disposed in the recess of the insulating layer; a light-shielding layer disposed on the insulating layer and having a recess, wherein in a cross-sectional view of the display device, the recess of the light-shielding layer comprises a first width and a second width, the first width is closer to the first substrate than the second width and the first width of the recess of the light-shielding layer is different from the second width of the recess of the light-shielding layer; and a second substrate opposite to the first substrate; wherein the recess of the light-shielding layer is overlapped with the recess of the insulating layer, wherein in the cross-sectional view of the display device, the recess of the insulating layer has a minimum width, the recess of the light-shielding layer has a minimum width, the minimum width of the recess of the light-shielding layer is the first width of the recess of the light-shielding layer, and the minimum width of the recess of the insulating layer is less than the minimum width of the recess of the light-shielding layer.",
    "2. The display device of claim 1, wherein the light conversion layer, the color filter layer overlaps with the recess of the insulating layer.",
    "3. The display device of claim 2, wherein the width of the light conversion layer is greater than the minimum width of the recess of the insulating layer.",
    "4. The display device of claim 1, wherein the light-shielding layer is disposed between the first substrate and the second substrate, wherein the color filter layer is disposed in the recess of the light-shielding layer.",
    "5. The display device of claim 4, the second width of the recess of the light-shielding layer is greater than the minimum width of the recess of the insulating layer.",
    "6. The display device of claim 1, wherein the display device comprises a light-shielding region and a non-light-shielding region adjacent to the light-shielding region, the color filter layer is disposed in the non-light-shielding region, and a transistor is disposed in the light-shielding region.",
    "7. The display device of claim 1, further comprising a conductive layer disposed on the insulating layer, wherein the light-emitting diode is disposed on the insulating layer and the conductive layer is electrically connected to an upper electrode of the light-emitting diode.",
    "8. The display device of claim 1, further comprising a thin film transistor electrically connected to the light-emitting diode."
  ],
  "description_excerpt": "The invention relates to display devices, and in particular to a display device with light-emitting elements.\n\nAs digital technology develops, display devices are being used more widely in many aspects of daily life, such as in televisions, notebook computers, computers, cell phones, smartphones, and other modern information devices. Also, display devices are continuously being developed to be lighter, thinner, smaller and more fashionable than previous generations. These display devices include light-emitting diode display devices.\n\nLight-emitting diodes (LEDs) generate electromagnetic radiation (for example, light) by applying the recombination of an electron-hole pair in a p-n junction. In a forward bias p-n junction formed of direct band gap material such as GaAs or GaN, electromagnetic radiation is generated by the recombination of electron-hole pairs pouring into a depletion region. The electromagnetic radiation may be in the visible light region or the invisible light region, and LEDs of different colors are formed of materials with different energy gaps.\n\nNowadays, LEDs for the display device industry are trending towards mass production, and any reduction in the production cost of LED display devices may bring a significant beneficial economic effect. However, existing display devices are not satisfactory in every aspect.\n\nTherefore, a display device that can increase display quality or reduce the production cost is still required in the industry.",
  "cpc": [
    "H10P 74/23",
    "B65G 43/08",
    "G01R 31/26",
    "G09G 2300/0426",
    "G09G 3/32",
    "H01L 21/288",
    "H01L 21/67144",
    "H01L 22/14",
    "H01L 22/20",
    "H01L 25/0753",
    "H01L 25/167",
    "H01L 27/124",
    "H01L 27/1248",
    "H01L 27/1255",
    "H01L 27/1259",
    "H01L 27/1262",
    "H01L 2933/0066",
    "H01L 33/0093",
    "H01L 33/38",
    "H01L 33/50",
    "H01L 33/505",
    "H01L 33/62",
    "H10D 86/021",
    "H10D 86/0212",
    "H10D 86/0221",
    "H10D 86/441",
    "H10D 86/451",
    "H10D 86/471",
    "H10D 86/481",
    "H10D 86/60",
    "H10H 20/01",
    "H10H 20/018",
    "H10H 20/0364",
    "H10H 20/831",
    "H10H 20/84",
    "H10H 20/851",
    "H10H 20/8514",
    "H10H 20/8515",
    "H10H 20/855",
    "H10H 20/857",
    "H10P 14/46",
    "H10P 72/0446",
    "H10P 74/207",
    "H10W 90/00"
  ],
  "ipc": [
    "B65G 43/08",
    "G01R 31/26",
    "G09G 3/32",
    "H01L 21/288",
    "H01L 21/66",
    "H01L 21/67",
    "H01L 25/075",
    "H01L 25/16",
    "H01L 27/12",
    "H01L 33/00",
    "H01L 33/38",
    "H01L 33/50",
    "H01L 33/62"
  ],
  "assignees": [
    "Innolux Corp"
  ],
  "inventors": [
    "Tung-Kai Liu",
    "Tsau-Hua Hsieh",
    "Wei-Cheng Chu",
    "Chun-Hsien Lin",
    "Chandra LIUS",
    "Ting-Kai Hung",
    "Kuan-Feng LEE",
    "Ming-Chang Lin",
    "Tzu-Min Yan",
    "Hui-Chieh Wang"
  ],
  "filing_date": "2022-08-05",
  "publication_date": "2024-05-07",
  "grant_date": "2024-05-07",
  "priority_date": "2016-06-14",
  "application_number": "US-202217817715-A",
  "family_id": "84194317",
  "cited_by_count": 0,
  "citations": [
    "US20060012288A1",
    "US20120008065A1",
    "US20160223863A1"
  ]
}

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