Image signal processing apparatus, image system and method of processing image signal

Information

  • Patent Application
  • 20070229664
  • Publication Number
    20070229664
  • Date Filed
    March 29, 2007
    17 years ago
  • Date Published
    October 04, 2007
    17 years ago
Abstract
Providing an image signal processing apparatus, in which burn-in of a display can be ignorable and power consumption can be reduced, when a blank datum for a blank area in an image signal is detected by a blank area detecting unit, an image signal processing unit processes the image signal so as to interpose a brightness gradation area between an image area and the blank area. Brightness in the brightness gradation area changes gradually between the image area and the blank area.
Description

BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is a basic block diagram of an embodiment of an image signal processing apparatus and an image system according to the present invention;



FIG. 2 is a block diagram of an example of the image signal processing apparatus and the image system shown in FIG. 1;



FIG. 3 is an illustration of a first example of a 16:9 display of a display unit shown in FIG. 1;



FIG. 4 is a an illustration of a second example of the 16:9 display of the display unit shown in FIG. 1;



FIG. 5 is an illustration of blocks in the 16:9 display shown in FIGS. 3, 4;



FIG. 6 is a graph of a relation of an expected brightness and an operating time about the display unit shown in FIG. 2; and



FIG. 7 is a flow chart of an example of a process of reducing burn-in, which is executed by a control unit of the image signal processing apparatus shown in FIG. 2.


Claims
  • 1. An image signal processing apparatus, which executes image processing for an image signal including an image datum for an image displayed in an image area on a display and a blank area datum for a blank displayed in a blank area other than the image area on the display, comprising: a blank area detecting unit for detecting the blank area datum of the image signal; andan image signal processing unit for processing the image signal so as to provide a brightness gradation area between the image area and the blank area on the display, wherein brightness in the brightness gradation area changes gradually between the image area and the blank area corresponding to detection of the blank area datum by the blank area detecting unit.
  • 2. The image signal processing apparatus according to claim 1, wherein the image signal processing unit processes the image signal so as to display the brightness gradation area, the brightness in which decreases gradually from a bright zone to a dark zone in the brightness gradation area.
  • 3. The image signal processing apparatus according to claim 1, wherein the image signal processing unit processes the image signal so as to provide the brightness gradation area from a boundary between the image area and the blank area into the image area.
  • 4. The image signal processing apparatus according to claim 1, wherein the image signal processing unit processes the image signal so as to provide the brightness gradation area from a boundary between the image area and the blank area into the blank area.
  • 5. The image signal processing apparatus according to claim 1 further comprising: a display time measuring unit for measuring each accumulated display time of displaying the image area and the blank area in the image signal,wherein the image signal processing unit processes the image signal so as to control the brightness in the brightness gradation area based on the accumulated display time measured by the display time measuring unit.
  • 6. An image system comprising: an image signal processing apparatus claimed in claim 1; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 7. A method of processing an image signal, which includes an image datum for an image displayed in an image area on a display and a blank area datum for a blank displayed in a blank area other than the image area on the display, comprising the steps of: detecting the blank area datum of the image signal; andprocessing the image signal so as to provide a brightness gradation area between the image area and the blank area on the display, wherein brightness in the brightness gradation area changes gradually between the image area and the blank area corresponding to detection of the blank area datum.
  • 8. The image signal processing apparatus according to claim 2, wherein the image signal processing unit processes the image signal so as to provide the brightness gradation area from a boundary between the image area and the blank area into the image area.
  • 9. The image signal processing apparatus according to claim 2, wherein the image signal processing unit processes the image signal so as to provide the brightness gradation area from a boundary between the image area and the blank area into the blank area.
  • 10. The image signal processing apparatus according to claim 2 further comprising: a display time measuring unit for measuring each accumulated display time of displaying the image area and the blank area in the image signal,wherein the image signal processing unit processes the image signal so as to control the brightness in the brightness gradation area based on the accumulated display time measured by the display time measuring unit.
  • 11. The image signal processing apparatus according to claim 3 further comprising: a display time measuring unit for measuring each accumulated display time of displaying the image area and the blank area in the image signal,wherein the image signal processing unit processes the image signal so as to control the brightness in the brightness gradation area based on the accumulated display time measured by the display time measuring unit.
  • 12. The image signal processing apparatus according to claim 4 further comprising: a display time measuring unit for measuring each accumulated display time of displaying the image area and the blank area in the image signal,wherein the image signal processing unit processes the image signal so as to control the brightness in the brightness gradation area based on the accumulated display time measured by the display time measuring unit.
  • 13. The image signal processing apparatus according to claim 8 further comprising: a display time measuring unit for measuring each accumulated display time of displaying the image area and the blank area in the image signal,wherein the image signal processing unit processes the image signal so as to control the brightness in the brightness gradation area based on the accumulated display time measured by the display time measuring unit.
  • 14. The image signal processing apparatus according to claim 9 further comprising: a display time measuring unit for measuring each accumulated display time of displaying the image area and the blank area in the image signal,wherein the image signal processing unit processes the image signal so as to control the brightness in the brightness gradation area based on the accumulated display time measured by the display time measuring unit.
  • 15. An image system comprising: an image signal processing apparatus claimed in claim 2; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 16. An image system comprising: an image signal processing apparatus claimed in claim 3; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 17. An image system comprising: an image signal processing apparatus claimed in claim 4; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 18. An image system comprising: an image signal processing apparatus claimed in claim 5; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 19. An image system comprising: an image signal processing apparatus claimed in claim 8; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 20. An image system comprising: an image signal processing apparatus claimed in claim 9; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 21. An image system comprising: an image signal processing apparatus claimed in claim 10; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 22. An image system comprising: an image signal processing apparatus claimed in claim 11; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 23. An image system comprising: an image signal processing apparatus claimed in claim 12; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 24. An image system comprising: an image signal processing apparatus claimed in claim 13; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
  • 25. An image system comprising: an image signal processing apparatus claimed in claim 14; anda display unit for displaying the image by the image signal processed by the image signal processing apparatus.
Priority Claims (1)
Number Date Country Kind
2006-094112 Mar 2006 JP national