LED display with wavelength conversion layer

Patent metadata

Field	Value
Publication number	US-9599857-B2
Application number	US-201514811417-A
Country	US
Kind code	B2
Filing date	Jul 28, 2015
Priority date	Jun 18, 2013
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A display and method of manufacture are described. The display may include a substrate including an array of pixels with each pixel including multiple subpixels, and each subpixel within a pixel is designed for a different color emission spectrum. An array of micro LED device pairs are mounted within each subpixel to provide redundancy. An array of wavelength conversion layers comprising phosphor particles are formed over the array of micro LED device pairs for tunable color emission spectrum.

First claim

What is claimed is:

1. A display panel comprising:
a display substrate
an array of LED devices mounted on the display substrate within a corresponding array of subpixels in a pixel area of the display substrate;
a cover over the display substrate;
an array of wavelength conversion layers on the cover and positioned directly over the array of LED devices;
an array of color filter layers on the cover and directly over the array of wavelength conversion layers;
a pattern of black matrix material on the cover and arranged between the array of subpixels; and
one or more top electrode layers underneath the cover, and spanning over the display substrate and the array of LED devices and in electrical contact with the array of LED devices.

2. The display panel of claim 1 , wherein the one or more top electrode layers comprises a transparent conductive oxide material.

3. The display panel of claim 1 , further comprising:
a ground line on or within the display substrate; and
the one or more top electrode layers electrically connects the array of LED devices to the ground line.

4. The display panel of claim 1 , wherein the cover is a glass plate.

5. The display panel of claim 1 , wherein the cover is sealed around peripheral edges of the display substrate.

6. The display panel of claim 1 , further comprising:
an array of pixels, each pixel comprising a plurality of subpixels designed for different color emission spectra, wherein the plurality of subpixels comprises:
a first subpixel including:
a first LED device;

a second subpixel including:
a second LED device;
a wavelength conversion layer of the array of wavelength conversion layers;

wherein a wavelength conversion layer is not positioned directly over the first LED device, and wherein the first and second LED devices have the same composition for the same emission spectrum.

7. The display panel of claim 6 , wherein the first and second LED devices are designed to emit a primary blue wavelength.

8. The display panel of claim 7 , further comprising an array of color filter layers on the cover and directly above the array of wavelength conversion layers, wherein the array of color filter layers is to absorb the primary blue wavelength.

9. The display panel of claim 1 , further comprising:
an array of pixels, each pixel comprising a plurality of subpixels designed for different color emission spectra, wherein the plurality of subpixels comprises:
a first subpixel including:
a first LED device;
a first wavelength conversion layer of the array of wavelength conversion layers;

a second subpixel including:
a second LED device;
a second wavelength conversion layer of the array of wavelength conversion layers;

wherein the first and second LED devices have the same composition for the same emission spectrum.

10. The display panel of claim 9 , wherein the first and second LED devices are designed to emit a primary ultraviolet or deep blue wavelength.

11. The display panel of claim 10 , wherein the array of color filter layers is to absorb the primary ultraviolet or deep blue wavelength.

12. The display panel of claim 1 , further comprising an array of controller chips in the pixel area, each controller chip to switch and drive a corresponding plurality of LED devices of the array of LED devices.

13. The display panel of claim 12 , further comprising a pattern of electrical distribution lines connecting the array of controller chips to the array of LED devices.

14. The display panel of claim 1 , wherein the pattern of electrical distribution lines connects the array of controller chips to a data driver circuit and a scan driver circuit.

15. The display panel of claim 14 , wherein the data driver circuit and a scan driver circuit are outside the pixel area of the display substrate.

Assignees

• Luxvue Tech Corp
• Apple Inc

Inventors

• Bibl Andreas
• Mcgroddy Kelly

Classifications

• H10W72/0198

  batch processes · CPC title

• H10W90/00 Primary

  Package configurations · CPC title

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• G02F2001/133614

  Physics · mapped topic

• H01L33/56

  Electricity · mapped topic