Inorganic-light-emitter display with integrated black matrix

• US 9,818,725 B2
• Filed: 08/04/2015
• Issued: 11/14/2017
• Est. Priority Date: 06/01/2015
• Status: Active Grant

• Current Assignee: X Display Company Technology Limited (Sensinnovat BVBA)
• Original Assignee: X-Celeprint Limited
• Inventors: Bower, Christopher, Den Boer, Willem, Meitl, Matthew, Cok, Ronald S.
• Primary Examiner(s): TORNOW, MARK W
• Application Number:
  US14/818,201
• Publication Number:
  US 20160351539A1
• Time in Patent Office: 833 Days
• Field of Search: 349 61- 63, 345205
• CPC Class Codes: H01L 2224/96 the devices being encapsulated in a common layer, e.g. neo-wafer or pseudo-wafer, said common layer being separable into individual assemblies after connecting
• CPC Class Codes: H01L 25/0655 the devices being arranged next to each other
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2933/0025 relating to coatings
• CPC Class Codes: H01L 2933/0033 relating to semiconductor body packages
• CPC Class Codes: H01L 2933/0066 relating to arrangements for conducting electric current to or from the semiconductor body
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

An inorganic-light-emitter display includes a display substrate and a plurality of spatially separated inorganic light emitters distributed on the display substrate in a light-emitter layer. A light-absorbing layer located on the display substrate in the light-emitter layer is in contact with the inorganic light emitters. Among other things, the disclosed technology provides improved angular image quality by avoiding parallax between the light emitters and the light-absorbing material, increased light-output efficiency by removing the light-absorbing material from the optical path, improved contrast by increasing the light-absorbing area of the display substrate, and a reduced manufacturing cost in a mechanically and environmentally robust structure using micro transfer printing.

Claims

1. An inorganic-light-emitter display, comprising:

a display substrate;

a plurality of spatially separated inorganic light emitters distributed on the display substrate in a light-emitter layer, wherein the plurality of light emitters emit light through the display substrate; and

a light-absorbing black-matrix material surrounding at least a portion of the plurality of inorganic light emitters in the light-emitter layer, wherein the light-absorbing material at least partially covers the display substrate, wherein each light emitter of the plurality of inorganic light emitters has a light-emissive area and wherein the combined light-emissive areas of the plurality of inorganic light emitters is less than or equal to one eighth of the light-absorbing material area.

2. The display of claim 1, comprising a transparent adhesive layer located between the display substrate and the plurality of spatially separated inorganic light emitters that adheres the spatially separated inorganic light emitters to the display substrate.

3. The display of claim 1, comprising one or more pixel controllers located at least partially over the light-absorbing material and electrically connected to the inorganic light emitters.

4. The display of claim 1, comprising one or more pixel controllers disposed on the display substrate, the pixel controllers connected to the inorganic light emitters with electrical connections, and the pixel controllers and the electrical connections located at least partially between the light-absorbing layer and the display substrate.

5. The display of claim 1, wherein the inorganic light emitters have light-emitting areas, the light-absorbing black-matrix material forms a light-absorbing layer that at least partially covers a top surface of the inorganic light emitters, and comprising optical vias in the light-absorbing layer, the optical vias located at least partially in correspondence with the light-emitting areas of the inorganic light emitters.

6. The display of claim 1, wherein the plurality of inorganic light emitters and the light-absorbing material are disposed on a common surface.

7. The display of claim 1, comprising:

one or more pixel controllers electrically connected to the plurality of spatially separated inorganic light emitters, each pixel controller distributed over the display substrate in the light-emitter layer, wherein the light-absorbing black-matrix material surrounds at least a portion of the one or more pixel controllers.

8. The display of claim 1, wherein the light-absorbing black-matrix material is in contact with the display substrate.

9. The display of claim 1, wherein the light-absorbing black-matrix material is in contact with the plurality of spatially separated inorganic light emitters.

10. The display of claim 1, comprising one or more pixel controllers located at least partially over and in contact with the light-absorbing material, wherein each electrically connected to the inorganic light emitters.

11. The display of claim 1, wherein the plurality of spatially separated inorganic light emitters are in contact with the display substrate.

12. An inorganic-light-emitter display, comprising:

a display substrate;

a plurality of spatially separated inorganic light emitters distributed on the display substrate in a light-emitter layer;

a light-absorbing black-matrix material surrounding at least a portion of the plurality of inorganic light emitters in the light-emitter layer, wherein the light-absorbing material at least partially covers the display substrate; and

one or more pixel controllers electrically connected to the plurality of spatially separated inorganic light emitters, each pixel controller distributed over the display substrate in the light-emitter layer, wherein the light-absorbing black-matrix material surrounds at least a portion of the one or more pixel controllers,

wherein each light emitter of the plurality of inorganic light emitters has a light-emissive area and wherein the combined light-emissive areas of the plurality of inorganic light emitters is less than or equal to one eighth of the light-absorbing material area.

13. The display of claim 12, wherein at least a portion of the light-absorbing black- matrix material is in contact with the display substrate.

14. The display of claim 12, wherein the light-absorbing black-matrix material is in contact with the plurality of spatially separated inorganic light emitters.

15. An inorganic-light-emitter display, comprising:

a display substrate;

a plurality of spatially separated inorganic light emitters distributed on or over the display substrate in a light-emitter layer;

a light-absorbing black-matrix material surrounding at least a portion of the plurality of inorganic light emitters in the light-emitter layer, wherein the light-absorbing material at least partially covers the display substrate; and

one or more pixel controllers electrically connected to the plurality of spatially separated inorganic light emitters, each pixel controller distributed on the display substrate in the light-emitter layer, wherein the light-absorbing black-matrix material at least partially covers the one or more pixel controllers and the one or more pixel controllers are in contact with the display substrate,

wherein each light emitter of the plurality of inorganic light emitters has a light-emissive area and wherein the combined light-emissive areas of the plurality of inorganic light emitters is less than or equal to one eighth of the light-absorbing material area.