INORGANIC-LIGHT-EMITTER DISPLAY WITH INTEGRATED BLACK MATRIX

• US 20160351539A1
• Filed: 08/04/2015
• Published: 12/01/2016
• 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.
• Granted Patent: US 9,818,725 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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; and

a light-absorbing 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.

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.

5. 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.

6. 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.

7. The display of claim 1, 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.

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

3-4. -4. (canceled)

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

a display substrate;

a light-absorbing material in contact with the display substrate; and

a plurality of inorganic light emitters distributed on a side of the light-absorbing material opposite the display substrate.

10. The display of claim 9, wherein the plurality of inorganic light emitters distributed on the light-absorbing material are at least partially embedded in the light-absorbing material.

11. The display of claim 9, comprising one or more pixel controllers connected to the inorganic light emitters on the side of the light-absorbing material opposite the display substrate.

12. The display of claim 11, wherein the light-absorbing material forms a first layer and comprising a second layer of light-absorbing material on the first layer, the pixel controllers and the connections.

13. The display of claim 12, comprising inorganic light emitter optical vias in the second layer.

14. The display of claim 9, wherein a surface of each of the plurality of inorganic light emitters are flush with a surface of the light-absorbing material.

17. The display of claim 9, wherein the light-absorbing material is contiguous and surrounds the plurality of inorganic light emitters on the display substrate.

47. The display of claim 9, comprising:

vias formed in the light-absorbing material where the light-absorbing material overlaps the plurality of light emitters.

49. The display of claim 9, comprising a plurality of pixel substrates separate from the display substrate and wherein each of the plurality of inorganic light emitters are located on one of the plurality of pixel substrates and the plurality of pixel substrates are located on the display substrate.

15-16. -16. (canceled)

18-46. -46. (canceled)

48. (canceled)

50-53. -53. (canceled)

54. A method of micro assembling a micro light-emitting diode (LED) display, the method comprising:

providing a plurality of inorganic light emitters;

micro transfer printing the plurality of inorganic light emitters onto a display substrate such that the plurality of inorganic light emitters are spatially separated on the display substrate in a light-emitter layer; and

depositing a light-absorbing material on the display substrate in the light-emitter layer and surrounding at least a portion of the plurality of inorganic light emitters, thereby forming a light-absorbing layer on the display substrate.

65. The method of claim 54, wherein the plurality of inorganic light emitters distributed on the light-absorbing material are at least partially embedded in the light-absorbing material.

55-64. -64. (canceled)

66-115. -115. (canceled)