VIDEO PROCESSING APPARATUS AND VIDEO PROCESSING METHOD

• US 20080030430A1
• Filed: 05/23/2007
• Published: 02/07/2008
• Est. Priority Date: 08/04/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: CHO, Jeong-bae
• Granted Patent: US 8,063,870 B2
• Time in Patent Office: Days
• US Class Current: 345/44
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix

Abstract

A video processing apparatus and method, the apparatus including: a signal processing part to process an inputted video signal; a display panel to display the processed video signal; a backlight unit that comprises a plurality of light emitting elements that correspond to pixels of the processed video signal and emit light to the display panel; and a controller to calculate a brightness of each of the pixels based on R, G and B component values of each of the pixels, and to control the backlight unit such that the plurality of light emitting elements emit light with intensities corresponding to the calculated brightness of each of the pixels. Thus, aspects of the present invention are capable of improving quality of a video and reducing power consumption.

Claims

1. A video processing apparatus comprising:

a signal processing part to process an inputted video signal;

a display panel to display the video signal processed by the signal processing part;

a backlight unit comprising a plurality of light emitting elements that correspond to pixels of the processed video signal and emit light to the display panel; and

a controller to calculate a brightness of each of the pixels based on R, G, and B component values of each of the pixels of the video signal processed by the signal processing part, and to control the backlight unit such that the plurality of light emitting elements emit light with intensities corresponding to the calculated brightness of each of the pixels.

2. The video processing apparatus as claimed in claim 1, wherein:

the R, G, and B component values of each of the pixels are binary numbers; and

the controller calculates the brightness of each of the pixels by performing an OR operation for the R, G, and B component values of each of the pixels such that the intensities correspond to a most significant 1 bit or bits of the R, G, and B component values.

3. The video processing apparatus as claimed in claim 1, further comprising:

a storage part to store the calculated brightness of each of the pixels, wherein the controller controls the backlight unit to emit the light with the intensities corresponding to the stored brightness of each of the pixels when the video signal is inputted to the video processing apparatus.

4. The video processing apparatus as claimed in claim 3, wherein the storage part stores information on the intensities of the light corresponding to the calculated brightness of each of the pixels.

5. The video processing apparatus as claimed in claim 2, further comprising:

a detecting part to detect a brightness of the light emitted from each of the plurality of light emitting elements of the backlight unit,

wherein the controller periodically calculates an average of the brightness of the light detected by the detecting part such that when the average exceeds a predetermined value, the controller calculates the brightness of each of the pixels and controls the detecting part and the backlight unit such that the plurality of the light emitting elements emits the light with the intensities corresponding to the calculated brightness of each of the pixels.

6. The video processing apparatus as claimed in claim 1, further comprising:

a detecting part to detect a brightness of the light emitted from the backlight unit,

wherein the controller periodically calculates an average of the brightness of the light detected by the detecting part such that when the average exceeds a predetermined value, the controller calculates the brightness of each of the pixels and controls the detecting part and the backlight unit such that the plurality of the light emitting elements emits the light with the intensities corresponding to the calculated brightness or each of the pixels.

7. The video processing apparatus as claimed in claim 2, wherein the video signal inputted to the signal processing part is inputted through a low voltage differential signaling (LVDS) interface.

8. The video processing apparatus as claimed in claim 1, wherein the video signal inputted to the signal processing part is inputted through a low voltage differential signaling (LVDS) interface.

9. The video processing apparatus as claimed in claim 2, wherein the plurality of light emitting elements comprises at least one light emitting diode.

10. The video processing apparatus as claimed in claim 1, wherein the plurality of light emitting elements comprises at least one light emitting diode.

11. A video processing method of a video processing apparatus comprising a backlight unit including a plurality of light emitting elements, the method comprising:

receiving a video signal;

calculating a brightness of each pixel of the received video signal based on R, G, and B component values of each pixel; and

emitting light from the plurality of light emitting elements with intensities corresponding to the calculated brightness of each of the pixels.

12. The video processing method as claimed in claim 11, wherein:

the R, G, and B component values of each of the pixels are binary numbers; and

the calculating of the brightness of each of the pixels of the received video signal comprises;

calculating the brightness of each of the pixels by performing an OR operation for the R, G, and B component values of each of the pixels such that the intensities correspond to a most significant 1 bit or bits of the R, G, and B component values..

13. The video processing method as claimed in claim 11, further comprising:

storing the calculated brightness of each of the pixels.

14. The video processing method as claimed in claim 13, wherein the storing of the calculated brightness further comprises:

storing information on the intensities of the light corresponding to the calculated brightness of each of the pixels.

15. The video processing method as claimed in claim 12, wherein:

the calculating of the brightness of each of the pixels of the received video signal further comprises detecting the brightness of the light emitted from each of the plurality of light emitting elements, and

the emitting of the light comprises;

calculating an average of the detected brightness of the light; and

emitting the light from the plurality of light emitting elements with the intensities corresponding to the calculated brightness of each of the pixels when the calculated average exceeds a predetermined value.

16. The video processing method as claimed in claim 11, wherein:

the calculating of the brightness of each of the pixels of the received video signal comprises detecting the brightness of the light emitted from the plurality of light emitting elements, and

the emitting of the light comprises;

calculating an average of the detected brightness of the light; and

emitting the light from the plurality of light emitting elements with the intensities corresponding to the calculated brightness of each of the pixels when the calculated average exceeds a predetermined value.

17. The video processing method as claimed in claim 12, wherein the video signal is inputted through a low voltage differential signaling (LVDS) interface.

18. The video processing method as claimed in claim 11, wherein the video signal inputted through a low voltage differential signaling (LVDS) interface.

19. The video processing method as claimed in claim 12, wherein the plurality of light emitting elements comprises at least one light emitting diode.

20. The video processing method as claimed in claim 11, wherein the plurality of light emitting elements comprises at least one light emitting diode.

21. A video processing apparatus comprising:

a signal processing part to process an inputted video signal; and

a controller to calculate a brightness of each pixel of the processed video signal based on R, G, and B component values of each of the pixels of the video signal.

22. The video processing apparatus as claimed in claim 21, further comprising:

a display panel to display the video signal processed by the signal processing part; and

a backlight unit comprising a plurality of light emitting elements that correspond to the pixels of the processed video signal and emit light to the display panel,

wherein the controller controls the backlight unit such that the plurality of light emitting elements emit light with intensities corresponding to the calculated brightness of each of the pixels.

23. The video processing apparatus as claimed in claim 21, wherein:

the R, G, and B component values of each of the pixels are binary numbers; and

the controller calculates the brightness of each of the pixels by performing an OR operation for the R, G, and B component values of each of the pixels such that the intensities correspond to a most significant 1 bit or bits of the R, G, and B component values.

24. The video processing apparatus as claimed in claim 22, further comprising:

a storage part to store the calculated brightness of each of the pixels, wherein the controller controls the backlight unit to emit the light with the intensities corresponding to the stored brightness of each of the pixels when the video signal is inputted to the video processing apparatus.

25. The video processing apparatus as claimed in claim 22, further comprising:

a detecting part to detect a brightness of the light emitted from the plurality of light emitting elements,

wherein the controller periodically calculates an average of the brightness of the light detected by the detecting part such that when the average exceeds a predetermined value, the controller calculates the brightness of each of the pixels and controls the detecting part and the backlight unit such that the plurality of the light emitting elements emits the light with the intensities corresponding to the calculated brightness of each of the pixels.