Extending dynamic range of a display

• US 9,373,277 B2
• Filed: 06/20/2013
• Issued: 06/21/2016
• Est. Priority Date: 06/21/2012
• Status: Expired due to Fees

• Current Assignee: BAE Systems Information and Electronic Systems Integration Incorporated (BAE Systems Plc)
• Original Assignee: BAE Systems Information and Electronic Systems Integration Incorporated (BAE Systems Plc)
• Inventors: Sagan, Stephen F.
• Primary Examiner(s): LEE, NICHOLAS J
• Application Number:
  US13/922,305
• Publication Number:
  US 20130342591A1
• Time in Patent Office: 1,097 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133509 Filters, e.g. light shielding masks
• CPC Class Codes: G09G 3/2007 Display of intermediate tones

Abstract

A method for extending dynamic range of a display that can attenuate brightness to match scene brightness is disclosed. Standard RGB sub pixel filtering as well as neutral density sub pixel filtering is performed. The color addressability of the display is utilized to extend the dynamic range of the emitted energy by more than one order of magnitude with the standard RGB sub pixel filtering. The standard filtering extends the dynamic range of the emitted energy by more than one order of magnitude, while the neutral density filtering extends the dynamic range of the emitted energy by two or more orders of magnitude.

Claims

1. A method for increasing dynamic range of a Red-Green-Blue display with red, green, and blue sub pixels comprising:

performing Red-Green-Blue filtering on said sub pixels; and

performing neutral density filtering on said sub pixels to extend the dynamic range of emitted energy by at least two orders of magnitude.

2. The method of claim 1 further comprising attenuating brightness of said display to match scene brightness.

3. The method of claim 1 further comprising fixed and variable filtering, frame blanking and spatial control.

4. The method of claim 1 wherein the standard Red-Green-Blue filtering extends the dynamic range of emitted energy by more than one order of magnitude.

5. The method of claim 1 wherein color addressability of said display is utilized to extend dynamic range of emitted energy.

6. The method of claim 1 wherein color addressability uses individual and sums of said red, green, and blue sub pixel energy without regard to actual monochrome color.

7. The method of claim 1 wherein a monochrome image is displayed, addressing portions of said display that is normally associated with color to affect amplitude.

8. A method for increasing dynamic range of a Red-Green-Blue display with red, green, and blue sub pixels comprising:

performing Red-Green-Blue filtering on said sub pixels;

performing neutral density filtering on said sub pixels to extend the dynamic range of emitted energy by at least two orders of magnitude;

attenuating brightness of said display to match scene brightness; and

performing fixed and variable filtering, frame blanking and spatial control.

9. The method of claim 8 wherein the standard Red-Green-Blue filtering extends the dynamic range of emitted energy by more than one order of magnitude.

10. The method of claim 8 wherein color addressability of said display is utilized to extend dynamic range of emitted energy.

11. The method of claim 8 wherein color addressability uses individual and sums of said red, green, and blue sub pixel energy without regard to actual monochrome color.

12. The method of claim 8 wherein a monochrome image is displayed, addressing portions of said display that is normally associated with color to affect amplitude.

13. A method for increasing dynamic range of a Red-Green-Blue display with red, green, and blue sub pixels comprising:

performing Red-Green-Blue filtering on said sub pixels;

performing neutral density filtering on said sub pixels to extend the dynamic range of emitted energy by at least two orders of magnitude;

attenuating brightness of said display to match scene brightness; and

performing fixed and variable filtering, frame blanking and spatial control, wherein the standard Red-Green-Blue filtering extends the dynamic range of emitted energy by more than one order of magnitude.

14. The method of claim 13 wherein color addressability of said display is utilized to extend dynamic range of emitted energy.

15. The method of claim 13 wherein color addressability uses individual and sums of said red, green, and blue sub pixel energy without regard to actual monochrome color.

16. The method of claim 13 wherein a monochrome image is displayed, addressing portions of said display that is normally associated with color to affect amplitude.