Pre-Processing in a Display Pipeline

Patent metadata

Field	Value
Publication number	US-2024129450-A1
Application number	US-202318392938-A
Country	US
Kind code	A1
Filing date	Dec 21, 2023
Priority date	Aug 11, 2020
Publication date	Apr 18, 2024
Grant date	—

Abstract

An electronic device may include a lenticular display. The lenticular display may have a lenticular lens film formed over an array of pixels. The display may have a number of independently controllable viewing zones. Each viewing zone displays a respective two-dimensional image. Each eye of the viewer may receive a different one of the two-dimensional images, resulting in a perceived three-dimensional image. The electronic device may include display pipeline circuitry that generates and processes content to be displayed on the lenticular display. Content generating circuitry may initially generate content that includes a plurality of two-dimensional images, each two-dimensional image corresponding to a respective viewing zone. Pre-processing circuitry may subsequently anisotropically resize each two-dimensional image. Pixel mapping circuitry may then be used to map the resized two-dimensional images to the array of pixels in the lenticular display.

First claim

What is claimed is:

1 . An electronic device comprising:
a display that includes an array of pixels and a lenticular lens film formed over the array of pixels, wherein the display has a plurality of independently controllable viewing zones; content rendering circuitry configured to generate a two-dimensional image associated with each independently controllable viewing zone; pre-processing circuitry configured to apply a filter to each one of the two-dimensional images; and pixel mapping circuitry configured to map each filtered two-dimensional image to a subset of pixels in the array of pixels, wherein each subset of pixels is associated with an independently controllable viewing zone.

2 . The electronic device defined in claim 1 , wherein the filter is configured to mitigate aliasing.

3 . The electronic device defined in claim 1 , wherein the filter is a low-pass filter.

4 . The electronic device defined in claim 1 , wherein applying the filter comprises taking an average brightness value of a group of pixels as the representative brightness for a pixel in the group of pixels.

5 . The electronic device defined in claim 1 , wherein applying the filter comprises taking a weighted average of brightness values of a group of pixels as the representative brightness for a pixel in the group of pixels.

6 . The electronic device defined in claim 1 , wherein the filter reduces high frequency noise in each one of the two-dimensional images.

7 . The electronic device defined in claim 1 , wherein the filter smooths rapid changes in brightness values in a first direction but does not smooth rapid changes in brightness values in a second direction that is orthogonal to the first direction.

8 . The electronic device defined in claim 7 , wherein the lenticular lens film comprises a plurality of lenticular lenses and wherein each lenticular lens extends along an axis that is parallel to the second direction.

9 . The electronic device defined in claim 7 , wherein the lenticular lens film comprises a plurality of lenticular lenses and wherein each lenticular lens is curved in the first direction.

10 . The electronic device defined in claim 7 , wherein the lenticular lens film comprises a plurality of lenticular lenses and wherein each lenticular lens magnifies light in the first direction while not magnifying light in the second direction.

11 . The electronic device defined in claim 1 , wherein each filtered two-dimensional image has more pixels than the respective subset of pixels to which that filtered two-dimensional image is mapped.

12 . The electronic device defined in claim 1 , wherein the lenticular lens film comprises a plurality of lenticular lenses and wherein each lenticular lens in the plurality of lenticular lenses extends diagonally relative to the array of pixels.

13 . An electronic device, comprising:
a display that includes an array of pixels and a lenticular lens film formed over the array of pixels, wherein the lenticular lens film comprises a plurality of lenticular lenses, wherein each lenticular lens in the plurality of lenticular lenses extends diagonally relative to the array of pixels, and wherein the display has a plurality of viewing zones; content rendering circuitry configured to generate a two-dimensional image associated with each viewing zone; and pre-processing circuitry configured to apply a filter to each one of the two-dimensional images.

14 . The electronic device defined in claim 13 , wherein the filter is configured to mitigate aliasing.

15 . The electronic device defined in claim 13 , wherein the filter blurs rapid changes in brightness values in each one of the two-dimensional images.

16 . The electronic device defined in claim 13 , wherein the filter filters high-frequency noise in a first direction but does not filter high-frequency noise in a second direction that is orthogonal to the first direction and wherein the plurality of lenticular lenses magnifies light in the first direction but does not magnify light in the second direction.

17 . A method of operating an electronic device comprising a display that includes an array of pixels and a lenticular lens film formed over the array of pixels, the method comprising:
generating at least one two-dimensional image; mapping the at least one two-dimensional image to the array of pixels; and applying a low-pass filter to the at least one two-dimensional image.

18 . The method defined in claim 17 , wherein the lenticular lens film comprises a plurality of lenticular lenses and wherein each lenticular lens in the plurality of lenticular lenses extends diagonally relative to the array of pixels.

19 . The method defined in claim 17 , wherein the low-pass filter smooths rapid changes in brightness values in a first direction but does not smooth rapid changes in brightness values in a second direction that is orthogonal to the first direction.

20 . The method defined in claim 19 , wherein the lenticular lens film comprises a plurality of lenticular lenses and wherein each lenticular lens magnifies light in the first direction while not magnifying light in the second direction.

Assignees

• Apple Inc

Inventors

• Zhang Sheng
• Wang Chaohao
• Ma Yue

Classifications

• H04N13/305 Primary

  using lenticular lenses, e.g. arrangements of cylindrical lenses · CPC title

• G06F16/168

  Details of user interfaces specifically adapted to file systems, e.g. browsing and visualisation, 2d or 3d GUIs (query results presentation G06F16/156) · CPC title

• G06T3/40

  Scaling of whole images or parts thereof, e.g. expanding or contracting · CPC title

• G06T5/20

  using local operators · CPC title

• G06T5/70

  Denoising; Smoothing · CPC title