Reduced blur, low flicker display system

Patent metadata

Field	Value
Publication number	US-9728142-B2
Application number	US-201514799670-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Jul 15, 2015
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A reduced blur, low flicker display system is provided, comprising: a display device comprising an array of pixel devices, each configured to be driven to a given output intensity value by changing each of the pixel devices between at least two intensity values within an image frame, including: a first intensity value and a second intensity value, higher than the first intensity value; and, a computing device configured to: spatially drive the pixel devices, according to image frames of image data, on a pixel-by-pixel basis and independent of one another, to respective output intensity values, according to at least two different spatio-temporal driving modes within a same image frame, a first set of the pixel devices driven according to a first spatio-temporal driving mode, and a second set of the pixel devices driven according to a second spatio-temporal driving mode, each within the same image frame.

First claim

What is claimed is:

1. A display system comprising:
a display device comprising an array of pixel devices, each of the pixel devices configured to be driven to a given output intensity value by changing each of the pixel devices between at least two intensity values within an image frame, the at least two intensity values including: a first intensity value and a second intensity value, the second intensity value higher than the first intensity value; and,
a computing device configured to:
compare image frames of image data, on a pixel-by-pixel basis, to determine: a first set of the pixel devices that correspond to moving image data; and a second set of the pixel devices that corresponds to static image data;
spatially drive the pixel devices, on a pixel-by-pixel basis and independent of one another, to respective output intensity values, according to at least two different spatio-temporal driving modes within a same image frame, the first set of the pixel devices driven according to a first spatio-temporal driving mode within the same image frame, and the second set of the pixel devices driven according to a second spatio-temporal driving mode within the same image frame,
the first spatio-temporal driving mode comprising one or more of a single-pulse pulsed width modulation PWM mode, a single-draw mode, and a single-flash mode, and the second spatio-temporal driving mode comprising one or more of a multi-pulse PWM mode, a multi-draw mode, and a multi-flash mode, wherein the first set of the pixel devices and the second set of the pixel devices are adjacent one another.

2. The display system of claim 1 , wherein the computing device is further configured to spatially drive the pixel devices based on data from an input channel received with the image data.

3. The display system of claim 1 , wherein the computing device is further configured to spatially drive the pixel devices based on comparing a current image frame to at least one previous image frame, on a pixel-by-pixel basis.

4. The display system of claim 1 , wherein the computing device is further configured to compare the image frames of the image data by: comparing current pixel values in a current image frame to previous pixel values of at least one previous image frame, on a pixel-by-pixel basis; determining the first set of the pixel devices when respective changes between respective current pixel values and respective previous pixel values meet a threshold condition; and, determining the second set of the pixel devices when the respective changes between the respective current pixel values and the respective previous pixel values are do not meet the threshold condition.

5. The display system of claim 4 , wherein meeting the threshold condition comprises a respective change being one or more of: being above a threshold pixel value change; and being indicative of motion occurring at a respective pixel.

6. The display system of claim 1 , wherein the computing device is further configured to control respective pixels at the pixel devices adjacent the first set of the pixel devices, other than the second set of pixel devices, to the first spatio-temporal driving mode.

7. The display system of claim 1 , wherein the computing device is further configured to determine the first set of the pixel devices and the second set of the pixel devices based on whether respective pixel devices are located in an image blend zone.

8. The display system of claim 1 , wherein the computing device is further configured to receive the image data, comprising the image frames, from one or more of a memory and an external image source.

9. A method comprising:
at a display system comprising a computing device and a display device comprising an array of pixel devices, each of the pixel devices configured to be driven to a given output intensity value by changing each of the pixel devices between at least two intensity values within an image frame, the at least two intensity values including: a first intensity value and a second intensity value, the second intensity value higher than the first intensity value,
comparing image frames of image data, on a pixel-by-pixel basis, to determine: a first set of the pixel devices that correspond to moving image data; and a second set of the pixel devices that corresponds to static image data;
spatially driving, using the computing device, the pixel devices, on a pixel-by-pixel basis and independent of one another, to respective output intensity values, according to at least two different spatio-temporal driving modes within a same image frame, the first set of the pixel devices driven according to a first spatio-temporal driving mode within the same image frame, and the second set of the pixel devices driven according to a second spatio-temporal driving mode within the same image frame,
the first spatio-temporal driving mode comprising one or more of a single-pulse pulsed width modulation PWM mode, a single-draw mode, and a single-flash mode, and the second spatio-temporal driving mode comprising one or more of a multi-pulse PWM mode, a multi-draw mode, and a multi-flash mode, wherein the first set of the pixel devices and the second set of the pixel devices are adjacent one another.

10. The method of claim 9 , further comprising spatially driving the pixel devices based on data from an input channel received with the image data.

11. The method of claim 9 , further comprising spatially driving the pixel devices based on comparing a current image frame to at least one previous image frame, on a pixel-by-pixel basis.

12. The method of claim 9 , further comprising comparing the image frames of the image data by: comparing current pixel values in a current image frame to previous pixel values of at least one previous image frame, on a pixel-by-pixel basis; determining the first set of the pixel devices when respective changes between respective current pixel values and respective previous pixel values meet a threshold condition; and, determining the second set of the pixel devices when the respective changes between the respective current pixel values and the respective previous pixel values are do not meet the threshold condition.

13. The method of claim 12 , wherein meeting the threshold condition comprises a respective change being one or more of: being above a threshold pixel value change; and being indicative of motion occurring at a respective pixel.

14. The method of claim 9 , further comprising controlling respective pixels at the pixel devices adjacent the first set of the pixel devices, other than the second set of pixel devices, to the first spatio-temporal driving mode.

15. The method of claim 9 , further comprising determining the first set of the pixel devices and the second set of the pixel devices based on whether respective pixel devices are located in an image blend zone.

16. A non-transitory computer-readable medium storing a computer program, wherein execution of the computer program is for:
at a display system comprising a computing device and a display device comprising an array of pixel devices, each of the pixel devices configured to be driven to a given output intensity value by changing each of the pixel devices between at least two intensity values within an image frame, the at least two intensity values including: a first intensity value and a second intensity value, the second intensity value higher than the first intensity value,
comparing image frames of image data, on a pixel-by-pixel basis, to determine: a first set of the pixel devices that correspond to moving image data; and a second set of the pixel d

Assignees

• Christie Digital Systems Usa

Inventors

• Nicholson Stuart James Myron

Classifications

• G09G3/002 Primary

  to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT · CPC title

• G09G3/003

  to produce spatial visual effects · CPC title

• G09G2310/0237

  Switching ON and OFF the backlight within one frame · CPC title

• G09G3/2018

  by time modulation using two or more time intervals · CPC title

• H04N5/57

  Control of contrast or brightness · CPC title