Anti-vibration system for the display screen of an image display device

• US 20090169127A1
• Filed: 08/08/2008
• Published: 07/02/2009
• Est. Priority Date: 12/28/2007
• Status: Abandoned Application

• Current Assignee: Altek Corporation
• Original Assignee: Altek Corporation
• Inventors: Lu, Tsung Yi
• Application Number:
  US12/222,394
• Publication Number:
  US 20090169127A1
• Time in Patent Office: Days
• US Class Current: 382/255
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G09G 2340/0464 Positioning
• CPC Class Codes: G09G 3/007 Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T

Abstract

An anti-vibration system and a method thereof keep images to be displayed on a fixed location of a display screen while the display screen moves. The system includes: a three-dimensional phase detector for detecting the three-dimensional displacement of the display screen, an image control unit for recording the initial location of an image displayed on the display screen, a digital signal processor (DSP) for converting the three-dimensional displacement into a two-dimensional displacement and receiving the initial position of the image to calculate an initial location of another image, an image phase adjusting unit for adjusting the output range of the image and displaying the image on the screen according to the initial location of another image calculated by the DSP. The image is kept on the same location of the display screen, so that it will not vibrate due to the display screen moves.

Claims

1. An anti-vibration system for the display screen of an image display device, comprising:

a display screen for outputting an image of a static picture or a dynamic video by the image display device;

an image control unit for reducing a first image displayed on the display screen, and recording and transmitting the initial location of the first image displayed on the display screen;

a three-dimensional phase detector for continuously detecting the three-dimensional displacement of the display screen;

a digital signal processor for receiving the initial location of the first image and the three-dimensional displacement, wherein the three-dimensional displacement is calculated and converted into a two-dimensional displacement, an initial location of a second image after the image display screen is moved is calculated according to the initial location of the first image and the two-dimensional displacement, and the digital signal processor outputs a signal containing the initial location of the second image according to the initial location of the second image; and

an image phase adjusting unit for receiving the initial location of the second image, wherein the image phase adjusting unit adjusts the location of the image edge according to the signal of the initial location of the second image and outputs the image frame to the display screen.

2. The anti-vibration system for the display screen of an image display device as claimed in claim 1, further comprising an anti-vibration control module that controls the three-dimensional phase detector to start or stop transmitting the three-dimensional phase displacement to the digital signal processor in order to turn on or turn off the anti-vibration system.

3. The anti-vibration system for the display screen of an image display device as claimed in claim 2, wherein the three-dimensional phase detector sets the location of the display screen on the anti-vibration control module turning on the anti-vibration function as the initial location for vibration detecting.

4. The anti-vibration system for the display screen of an image display device as claimed in claim 1, further comprising an amending and setting unit for setting the margin area of the display screen, and the display margin area is used for adjusting the display location of the second image by the system.

5. The anti-vibration system for the display screen of an image display device as claimed in claim 4, wherein the area of the display screen exceeding the reduced first image is the display margin area set by the amending and setting unit.

6. The anti-vibration system for the display screen of an image display device as claimed in claim 1, wherein the plane formed by two dimensions of the three dimensions detected by the three-dimensional phase detector is parallel to the display screen, and the third dimension is vertical to the display screen.

7. The anti-vibration system for the display screen of an image display device as claimed in claim 1, wherein when the image is a dynamic video file, and the initial location of the first image recorded by the image control unit is the initial location of a single image frame of the dynamic video file.

8. An anti-vibration method for the display screen of an image display device, comprising:

receiving an instruction of starting the image anti-vibration function;

recording the location of the display screen;

detecting the three-dimensional displacement of the display screen;

converting the three-dimensional displacement into a two-dimensional displacement and calculating the compensating value for the image frame; and

outputting the image frame to the display screen according to the compensating value.

9. The anti-vibration method for the display screen of an image display device as claimed in claim 8, wherein the step of recording a location of the display screen comprises:

reading a margin area of the display screen set by an amending and setting unit, wherein the margin area is used for adjusting the display location of a second image;

reducing a first image displayed on the display screen to make the image frame of the first image smaller than the display edge of the display screen according to the range of the margin area; and

recording the initial location of the first image by an image control unit.

10. The anti-vibration method for the display screen of an image display device as claimed in claim 9, wherein the step of converting the three-dimensional displacement into a two-dimensional displacement and calculating the compensating value for the image frame comprises:

receiving the three-dimensional displacement and converting the three-dimensional displacement into the two-dimensional displacement by a digital signal processor; and

calculating an initial location of a second image displayed on the moved display screen according to the two-dimensional displacement and the initial location of the first image so that the image displacement caused by the movement of the display screen is compensated when the display screen outputs the second image.

11. The anti-vibration method for the display screen of an image display device as claimed in claim 10, wherein the step of outputting the image frame according to the compensation value further comprises:

determining whether an instruction of stopping the image anti-vibration function is received or not; and

stopping transmitting the three-dimensional displacement to the digital signal processor when the instruction of stopping the image anti-vibration function is received.

12. The anti-vibration method for the display screen of an image display device as claimed in claim 10, wherein the step of calculating the initial location of the second image further comprises:

outputting a signal of the initial location of the second image according to the initial location of the second image; and

adjusting the location of the image edge of the image displayed on the display screen according to the signal of the initial location of the second image.

13. The anti-vibration method for the display screen of an image display device as claimed in claim 12, wherein the step of adjusting the location of the image edge of the image displayed on the display screen according to the signal of the initial location of the second image comprises:

detecting whether the second image composed of the initial location of the second image exceeds the display edge of the display screen or not by an image phase adjusting unit;

the image phase adjusting unit using the second image composed of the initial location of the second image to replace the first image and outputting the second image to the display screen, if the second image does not exceed the display edge of the display screen; and

the image phase adjusting unit ignoring the second image composed of the initial location of the second image and outputting the first image to the display screen, if the second image exceeds the display edge of the display screen.