Spatially dithered high-resolution

• US 10,347,168 B2
• Filed: 11/09/2017
• Issued: 07/09/2019
• Est. Priority Date: 11/10/2016
• Status: Active Grant

• Current Assignee: X Display Company Technology Limited (Sensinnovat BVBA)
• Original Assignee: X-Celeprint Limited
• Inventors: Meitl, Matthew, Cok, Ronald S., Bower, Christopher
• Primary Examiner(s): Patel, Premal R
• Application Number:
  US15/808,126
• Publication Number:
  US 20180130400A1
• Time in Patent Office: 607 Days
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/007 Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels
• CPC Class Codes: G09G 3/2051 with use of a spatial dither pattern
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
• CPC Class Codes: H01L 2224/24 of an individual high density interconnect connector

Abstract

A high-resolution display includes a display substrate having an array of light-emitting display pixels disposed thereon for displaying an image comprising an array of image pixels. The total number of display pixels in the array of light-emitting display pixels is less than and evenly divides the total number of image pixels in the image in at least one dimension. An actuator physically moves a display substrate and light-emitting display pixels in one or two dimensions in a direction parallel to a surface of the display substrate. A controller controls the light-emitting operation of display pixels and controls physical location of the display pixels. In some embodiments, a controller controls an actuator to spatially interpolate the spatial location of display pixels at successive times and controls the light-emitting operation of display pixels to display a different subset of the image pixels at each successive time.

Claims

1. A high-resolution display, comprising:

a display substrate;

an array of light-emitting display pixels disposed on the display substrate;

at least one actuator for physically moving the display substrate and the array of light-emitting display pixels to different physical locations in at least one dimension in a direction parallel to a surface of the display substrate;

a controller for controlling the light-emitting operation of the display pixels and for controlling a spatial location of the display pixels; and

wherein the controller controls the at least one actuator to interpolate the spatial location of the display pixels at successive times and controls the light-emitting operation of the display pixels to display a different subset of image pixels in an image at each successive time, wherein a total number of display pixels in the array of light-emitting display pixels is less than and evenly divides a total number of image pixels in the image in at least one dimension,

wherein the light-emitting display pixels comprise inorganic micro-light-emitting diodes having at least one of a length, a width, and a thickness that is less than or equal to twenty microns, wherein each of the micro-light-emitting diodes comprises a semiconductor material and a dielectric material that protects the micro-light-emitting diode, and wherein each of the display pixels comprises two or more sub-pixels comprising at least one of the micro-light-emitting diodes, wherein each of the at least one of the micro-light-emitting diodes is a micro-transfer printed micro-light-emitting diode comprising a fractured or separated tether laterally extending from the dielectric material.

2. The high-resolution display of claim 1, wherein the display pixels are color pixels comprising two or more light-emitting sub-pixels and the controller controls the sub-pixels to emit light of different colors.

3. The high-resolution display of claim 1, wherein each spatial location of the display pixels that the controller controls the at least one actuator to move the display substrate to at a successive time of the successive times corresponds to a relative location of image pixels in the image displayed by the display pixels at the successive time.

4. The high-resolution display of claim 1, wherein a total number of spatial locations the controller controls the at least one actuator to move to is the same as the total number of image pixels in the image.

5. The high-resolution display of claim 1, wherein the spatial locations are interpolated in one dimension.

6. The high resolution display of claim 1, wherein the spatial locations are interpolated in two directions.

7. The high-resolution display of claim 6, wherein the two directions are two orthogonal directions.

8. The high-resolution display of claim 1, wherein the spatial locations at successive times correspond to adjacent image pixels in the image.

9. The high-resolution display of claim 1, wherein the controller controls the at least one actuator to move continuously along a dither pattern.

10. The high-resolution display of claim 1, wherein each display pixel is separated from a neighboring pixel by a pixel separation distance and each of the at least one actuator has a range of motion for moving the display substrate that is at least equal to the pixel separation distance.

11. The high-resolution display of claim 10, wherein each display pixel is a single-color display pixel and adjacent display pixels emit different single-colors of light.

12. The high-resolution display of claim 1, comprising an actuator for physically moving the display substrate and the array of light-emitting display pixels in a direction orthogonal to a surface of the display substrate on which the array of light-emitting display pixels are disposed.

13. The high-resolution display of claim 1, wherein the display substrate is substantially transparent and the high-resolution display comprises at least one additional display substrate each comprising an array of light-emitting display pixels disposed thereon and at least one actuator for physically moving the additional display substrate and the array of light-emitting display pixels disposed thereon to different spatial locations at least one dimension parallel to a surface of the display substrate, wherein the display substrate and the at least one additional display substrate form a stack of display substrates.

14. The high-resolution display of claim 1, wherein each display pixel is separated from a neighboring display pixel by a pixel separation distance and each of the at least one actuator has a range of motion for moving the display substrate of at least one half of the pixel separation distance.

15. The high-resolution display of claim 1, wherein each display pixel is separated from a neighboring pixel by a pixel separation distance, wherein the display pixels are color pixels comprising two or more light-emitting sub-pixels, and the two or more light-emitting sub-pixels in a color pixel are separated by a distance that is less than or equal to one quarter of the pixel separation distance.

16. The high-resolution display of claim 1, wherein each light-emitting display pixel in the array of light-emitting display pixels comprises an active-matrix pixel controller.

17. The high-resolution display of claim 1, wherein the at least one actuator is (i) one or more piezo actuators disposed to move the display substrate in one dimension;

(ii) two or more piezo actuators disposed to move the display substrate in two dimensions;

or (iii) three or more piezo actuators disposed to move the display substrate in three dimensions.

18. The high-resolution display of claim 1, comprising an optical structure disposed over the array of display pixels such that light emitted by the display pixels is optically processed by the optical structure, wherein the at least one actuator is for moving the display substrate relative to the optical structure.

19. The high-resolution display of claim 18, wherein the at least one actuator moves the display substrate in at least one of (i) at least a portion of a straight line segment, a curved line segment, a circle, a circular line segment, a sinusoidal line segment, a sine wave, and (ii) a resonant mechanical mode in one or both of a horizontal plane parallel and a vertical plane orthogonal to a surface of the display substrate on which the array of light-emitting display pixels are disposed.

20. The high-resolution display of claim 1, comprising a head set, wherein at least the display substrate, the array of light-emitting display pixels, and the at least one actuator are mounted to the head set.