Video processing apparatus and video processing method

• US 8,063,870 B2
• Filed: 05/23/2007
• Issued: 11/22/2011
• Est. Priority Date: 08/04/2006
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Jeong-bae
• Primary Examiner(s): Awad; Amr
• Assistant Examiner(s): MATTHEWS, ANDRE L
• Application Number:
  US11/752,571
• Publication Number:
  US 20080030430A1
• Time in Patent Office: 1,644 Days
• Field of Search: 345/102, 345/4, 345/84, 345/691, 345/44
• US Class Current: 345/102
• 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 for processing an input video signal;

a display panel for displaying 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;

a controller for calculating 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 for controlling 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; and

a detecting part for detecting 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, 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,

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 and the intensities are adjusted in eight steps or four steps.

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

a storage part for storing 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 input to the video processing apparatus.

3. The video processing apparatus as claimed in claim 2, wherein the storage part stores information on the intensities of the light corresponding to the calculated brightness of each of the pixels.

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

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

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

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

8. 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,

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

further wherein, 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,

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 comprises performing an OR operation for the R G and B component values of the pixels such that the intensities correspond to a most significant 1 bit or bits of the R, G, and B component values, and the intensities are adjusted in eight steps or four steps.

9. The video processing method as claimed in claim 8, further comprising:

storing the calculated brightness of each of the pixels.

10. The video processing method as claimed in claim 9, 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.

11. processing method as claimed in claim 8, wherein the video signal is input through a low voltage differential signaling (LVDS) interface.

12. The video processing method as claimed in claim 8, wherein the video signal is input through a low voltage differential signaling (LVDS) interface.

13. The video processing method as claimed in claim 8, wherein the plurality of light emitting elements comprises at least one light emitting diode.

14. The video processing method as claimed in claim 8, wherein the plurality of light emitting elements comprises at least one light emitting diode.