Degradation control of display pixels for a high definition display

• US 9,654,693 B2
• Filed: 10/29/2014
• Issued: 05/16/2017
• Est. Priority Date: 10/29/2014
• Status: Active Grant

• Current Assignee: Grass Valley Canada (Belden Inc.)
• Original Assignee: Gvbb Holdings SARL (Vislink Technologies, Inc.)
• Inventors: Van Den Herik, Ben, de Boer, Martin
• Primary Examiner(s): DAGNEW, MEKONNEN D
• Application Number:
  US14/526,924
• Publication Number:
  US 20160127650A1
• Time in Patent Office: 930 Days
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G06T 3/20 Linear translation of whole images or parts thereof, e.g. panning
• CPC Class Codes: G06T 3/40 Scaling of whole images or parts thereof, e.g. expanding or contracting
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/046 Dealing with screen burn-in prevention or compensation of the effects thereof
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 5/10 Intensity circuits
• CPC Class Codes: H04N 23/635 Region indicators; Field of view indicators

Abstract

An apparatus includes a display and an image processing system. The display has an array of horizontal pixels and vertical pixels. The image processing system is configured to present an image on the display as a visible display array having a smaller size than the array and to shift the visible display array by at least one pixel.

Claims

1. A viewfinder apparatus, comprising:

a display comprising an array of horizontal pixels and vertical pixels; and

an image processing system configured to;

present an image and an overlay on the display as a visible display array having a smaller size than the array; and

shift the visible display array by at least one pixel, wherein the presented image and overlay are shifted by the at least one pixel.

2. The apparatus of claim 1, wherein the image processing system further comprises a shift processor configured to set a maximum horizontal shift of n pixels and a maximum vertical shift of m pixels, wherein the shift of at least one pixel comprises at least one of a horizontal shift of N pixels in the range 1<

=N<

=n, or a vertical shift of M pixels in the range 1<

=M<

=m.

3. The apparatus of claim 1, wherein the image processing system further comprises a shift processor configured to set a shift frequency and perform subsequent shifts of the visible display array at intervals according to the shift frequency.

4. The apparatus of claim 3, wherein the shift processor is further configured to apply a Gaussian filter to distribute the visible display array.

5. The apparatus of claim 1, wherein the image processing system further comprises a scaling unit configured to scale an input video image size to fit the visible display array.

6. The apparatus of claim 5, wherein the scaling unit comprises at least one upscaling unit and at least one downscaling unit configured to perform at least two of an upscaling of horizontal pixels, an upscaling of vertical pixels, a downscaling of horizontal pixels or a downscaling of vertical pixels.

7. The apparatus of claim 5, wherein the image processing system comprises a clock crossing unit to buffer a video input signal of a first clock domain for a scaling performed in a second clock domain.

8. The apparatus of claim 1, further comprising a user interface.

9. The apparatus of claim 1, further comprising a memory configured to store a current position of the shifted visible display array, wherein upon deenergizing the display and restoring power to the display, the position is recalled from the memory, and the visible display array is presented based on the stored position.

10. The apparatus of claim 1, wherein the overlay comprises a center cross-mark.

11. The apparatus of claim 10, wherein the center cross-mark forms a guide for a user with reference to a center of view of the display.

12. A camera, comprising:

an imager configured to convert photons to an electrical image signal; and

a viewfinder comprising;

a display comprising an array of horizontal pixels and vertical pixels; and

an image processing system configured to;

present an image and an overlay on the display based on the electrical image signal as a visible display array having a smaller size than the array; and

shift the visible display array by at least one pixel, wherein the presented image and overlay are shifted by the at least one pixel.

13. The camera of claim 12, wherein the overlay comprises a center cross-mark.

14. The camera of claim 13, wherein the center cross-mark forms a guide for a user with reference to a center of view of the camera.