JP2014048558A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that displays a whole display image without changing the content of the image to be displayed, and restricts ghosting of the display image.SOLUTION: A display device 100 according to the invention, for displaying input image data 10, comprises: a display device 3 having a displayable pixel area 3b having more extra pixel areas, compared to the resolution of the image data 10; and a display position changing part 2 configured to change the display position coordinates of an image 3a of the image data 10 within the range where the image 3a is not located beyond the displayable pixel area 3b. An arbitrary image is displayed in a pixel area where the image data 10 in the displayable pixel area 3b is not displayed.

Description

  The present invention relates to a display device, and more particularly to a display device that displays input image data while suppressing burn-in.

  Generally, a display device such as a CRT, a plasma display, or a liquid crystal display (LCD) may cause problems such as burn-in when a still image is continuously displayed for a long time. Conventionally, it has been common to use a screen saver to prevent burn-in.

  However, since the screen saver displays an image that is completely different from the still image that was originally displayed, the screen saver is not suitable for use for displaying a still image for a long time, such as display guidance or device information display.

  In view of this, a technique has been devised that suppresses image sticking by changing the spatial display position to an extent that the user does not notice, although it appears to be a still image.

  For example, in Patent Document 1, the display position of an image to be displayed on a display device is changed at regular intervals in units of several pixels. Moreover, in patent document 2, the display position of the image displayed on a display apparatus is temporally changed per subpixel. Further, in Patent Document 3, in a displayable pixel range of a display device, an area for displaying an enlarged display image and an area for displaying an enlarged display image are provided, and the enlargement / reduction ratio of these areas is changed with time. Suppresses burn-in.

JP 2000-227775 A JP-A-2005-107132 JP 2006-48068 A

  In the techniques of Patent Document 1 and Patent Document 2 described above, by changing the display position of the display image, a part of the image to be displayed protrudes from the displayable pixel area of the display device, and a part of the image is not displayed. There's a problem.

  Moreover, in the technique of the above-mentioned patent document 3, since the image to be displayed is partially enlarged / reduced and displayed, information different from the content of the original image may be presented to the observer.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a display device that displays the entire display image without changing the content of the image to be displayed and suppresses burn-in of the display image. .

  A display device according to the present invention is a display device that displays input image data, and includes a display device having a displayable pixel region having a pixel region that is extra than the resolution of the image data, and an image of the image data. A display position changing unit that changes display position coordinates in a range in which the image does not protrude from the displayable pixel area, and displays an arbitrary image in a pixel area in which no image data is displayed in the displayable pixel area And

  According to the display device of the present invention, it is possible to suppress image sticking to the display device by changing the image display position of the image data in the displayable pixel region of the display device.

  In addition, by changing the display position of the image data image within a range that does not protrude from the displayable pixel region, it is possible to present the image data to the observer without impairing the content of the image data.

  In addition, the display device according to the present invention can display an arbitrary image in a pixel area where image data in the displayable pixel area is not displayed. Therefore, if a black image is displayed in this area, it is possible to maintain good visibility of the image data.

1 is a functional block diagram of a display device according to an embodiment of the present invention. It is a functional block diagram of the drive control part of the display apparatus which concerns on embodiment of this invention. It is a figure which shows the displayable pixel area | region of the display apparatus which concerns on embodiment of this invention. It is a figure which shows the change of the display position of the image data in the display apparatus which concerns on embodiment of this invention.

<Configuration>
FIG. 1 shows a functional block diagram of display device 100 in the present embodiment. The display device 100 in the present embodiment changes the display device 3 for displaying the image data 10 input to the display device 100 and the display position of the image data 10 in the displayable pixel region 3 b of the display device 3. The display position changing unit 2 is provided.

  Further, the display device 100 according to the present embodiment further includes a display image data generation unit 1 that changes the display position of the image data 10 based on the output from the display position change unit 2 and outputs the change to the display device 3. Prepare. It is assumed that the image data 10 input to the display device 100 is video data including a still image.

  The display position changing unit 2 adjusts the display position of the image data 10 with reference to the internal memory 6 that stores information necessary for changing the display position of the image data 10 and the information stored in the internal memory 6. A display position adjusting unit 5 that controls the display position, and a drive control unit 4 that controls the display position adjusting unit 5. The drive control unit 4 includes a counter 4a and a comparison unit 4b (FIG. 2).

  The display device 3 includes M pixels in the longitudinal direction in addition to a pixel region based on XGA (1024 × 768) or SVGA (800 × 600), which is a pixel array employed in a general display device. Many extended pixels are provided in the lateral direction by N pixels.

  Assuming that the resolution of the image data 10 input to the display device 100 is XGA (1024 × 768) as shown in FIG. 3, for example, the displayable pixel region 3b of the display device 3 is (1024 + M) × ( 768 + N). Here, the values of the expanded pixel numbers M and N are preferably about 5 to 10.

  As shown in FIG. 3, the upper left coordinate of the image 3a of the image data 10 is represented as (Δx, Δy) with the upper left corner of the displayable pixel region 3b as the origin (0, 0). In order to display the image 3a of the image data 10 without protruding from the displayable pixel region 3b, Δx and Δy must be 0 or more and M or N or less, respectively.

  The internal memory 6 stores the coordinates of # 0 to #L corresponding to the display position (Δx, Δy) of the image 3a of the image data 10 in order to control the change of the display position of the image 3a of the image data 10. ing. The display position change of the image 3a of the image data 10 is sequentially performed from # 0 to #L, and after #L, the display position is returned to # 0. That is, the change in the display position is one cycle at L + 1 times. L is set to 2 or more. The coordinates of # 0 to #L can be arbitrarily determined. However, in order to move the entire displayable pixel region 3b, (0,0), (M, 0), (M, N), (0 , N). Table 1 shows an example. 4A to 4I show the display positions of the image 3a of the image data 10 corresponding to # 0 to # 8 in Table 1, respectively. Further, the internal memory 6 also stores the values of the extended pixel numbers M and N.

<Image data display position change operation>
In the present embodiment, XGA is assumed as the resolution of the image data 10 input to the display device 100. When image data 10 having a resolution different from that of XGA is input, the image data 10 is converted to XGA by a resolution conversion unit (not shown) provided in the display device 100, and then the display image data generation unit 1 and the display position are converted. Input to the change unit 2.

  Hereinafter, the operation of the display position changing unit 2 will be described. The image data 10 input to the display position changing unit 2 is input to the drive control unit 4. The drive control unit 4 detects a vertical synchronization signal included in the image data 10 and outputs a trigger signal 20 to the display position adjustment unit 5 at regular time intervals.

  The operation of the drive control unit 4 will be described with reference to FIG. The image data 10 input to the drive control unit 4 is input to the counter 4a. The counter 4a counts the vertical synchronization signal included in the image data 10 and outputs the count number to the comparison unit 4b.

  The comparison unit 4b compares the count number input from the counter 4a with the image position change cycle stored in the display position change unit 2 in advance. When the count number reaches the image position change period, the comparison unit 4b outputs the trigger signal 20 to the display position adjustment unit 5 and returns the count number of the counter 4a to zero. Note that the display position change period is preferably set to around several minutes in terms of time.

  Next, the operation of the display position adjustment unit 5 will be described. The display position adjustment unit 5 refers to any of the coordinates # 0 to # 8 in Table 1 stored in the internal memory 6 and outputs the display position control data 30 to the display image data generation unit 1. . When the trigger signal 20 is input from the drive control unit 4 to the display position adjustment unit 5, the number to be referred to is incremented, and the display position control data 30 is updated accordingly.

  For example, it is assumed that the display position adjustment unit 5 refers to the coordinates of # 0 in Table 1 as the display position control data 30 when the operation of the display device 100 is started. In this state, when the trigger signal 20 is input to the display position adjustment unit 5, the display position control data 30 is updated from # 0 to # 1.

  In this way, each time the trigger signal 20 is input to the display position adjustment unit 5, the display position control data 30 is updated from # 0 to # 8 in Table 1. When the trigger signal 20 is input while referring to # 8, the process returns to # 0.

  Next, the operation of the display image data generation unit 1 will be described. The display image data generation unit 1 receives the image data 10 and the display position control data 30 from the display position adjustment unit 5. First, when image data 10 is input, the image data 10 is stored in a storage unit (not shown). Next, the display image data generation unit 1 refers to the extended pixel numbers M and N stored in the internal memory 6 provided in the display position changing unit 2. Next, (Δx, Δy) is calculated from the display position control data 30 and the values of M and N. For example, when M and N are 10 and the display position control data 30 is (M / 2, N / 2), (Δx, Δy) = (5, 5).

  The display image data generation unit 1 determines the display position of the stored image data 10 based on (Δx, Δy). In the displayable pixel region 3b, arbitrary image data is added as an image to be displayed in a region where the image 3a of the image data 10 is not displayed, that is, a blanking region 3c (see FIG. 3).

  As described above, the display image data generation unit 1 generates the display image data 40 and outputs it to the display device 3. The display device 3 displays the display image data 40 input from the display image data generation unit 1.

  By the operation described above, the display device 100 according to the present embodiment causes the image 3a of the image data 10 in the displayable pixel region 3b at a constant time interval according to the order shown in FIGS. Change the display position of.

  As described above, in the displayable pixel region 3b, an arbitrary image can be displayed in the region where the image 3a of the image data 10 is not displayed, that is, in the blanking region 3c. Therefore, if a black image is displayed in the blanking region 3c, the visibility of the image 3a of the image data 10 can be kept good.

  In the present embodiment, the display position of the image 3a of the image data 10 is changed by M / 2 or N / 2 as shown in FIG. 3, but the method of changing the display position is limited to this. Not. Further, in the display position change, the amount of movement at one time is preferably about several pixels, and it is preferable to move in order within the displayable pixel region 3b as shown in FIG.

<Effect>
The display device 100 according to the present embodiment is a display device 100 that displays input image data 10, and includes a displayable pixel region 3 b that has a displayable pixel region 3 b that has an extra pixel region than the resolution of the image data 10. And a display position changing unit 2 that changes the display position coordinates of the image 3a of the image data 10 within a range where the image 3a does not protrude from the displayable pixel area 3b, and the image data 10 in the displayable pixel area 3b is not displayed. An arbitrary image is displayed in the pixel area, that is, the blanking area 3c.

  Therefore, by changing the display position of the image 3 a of the image data 10 in the displayable pixel region 3 b of the display device 3, it is possible to suppress image sticking to the display device 3.

  Further, by changing the display position of the image 3a of the image data 10 within a range that does not protrude from the displayable pixel region 3b, the image data 10 can be presented to the observer without deteriorating the content of the image data 10.

  In addition, display device 100 in the present embodiment can display an arbitrary image in blanking region 3c. Therefore, if a black image is displayed in the blanking region 3c, the visibility of the image 3a of the image data 10 can be kept good.

  In the display device 100 according to the present embodiment, the number of pixels in the vertical and horizontal directions of the displayable pixel region 3b is two pixels or more larger than the resolution of the image data 10.

  Therefore, by setting the number of extended pixels M and N to 2 or more, the image 3a of the image data 10 can change the display position of at least one pixel in all four directions, up, down, left, and right within the displayable pixel region 3b. Therefore, it is possible to obtain the effect of suppressing seizure more reliably.

  In the display device 100 according to the present embodiment, a pixel area in which the image 3a in the displayable pixel area 3b is not displayed, that is, an arbitrary image displayed in the blanking area 3c is a black image. Therefore, by making the image displayed in the blanking region 3c black, it is possible to maintain good visibility of the image 3a even when the image 3a of the image data 10 is a dark image.

  In the display device 100 according to the present embodiment, the display position changing unit 2 changes the display position of the image 3a of the image data 10 at a constant time interval. Accordingly, by changing the display position of the image 3a of the image data 10 at a constant time interval, it is possible to more reliably avoid the same image from being continuously displayed on a certain pixel, and therefore, the burn-in can be suppressed more effectively. It is possible.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

  DESCRIPTION OF SYMBOLS 1 Display image data generation part, 2 Display position change part, 3 Display device, 3a image, 3b Displayable pixel area, 3c Blanking area, 4 Drive control part, 4a counter, 4b Comparison part, 5 Display position adjustment part, 6 internal memory, 10 image data, 20 trigger signal, 30 display position control data, 40 display image data, 100 display device.

Claims (4)

A display device for displaying input image data,
A display device comprising a displayable pixel region having a pixel region that is extra than the resolution of the image data;
A display position changing unit that changes the display position coordinates of the image of the image data in a range in which the image does not protrude from the displayable pixel region;
With
An arbitrary image is displayed in a pixel area where the image data is not displayed in the displayable pixel area.
Display device. The vertical pixel region and the horizontal pixel region of the displayable pixel region are two or more pixels larger than the resolution of the image data,
The display device according to claim 1. The arbitrary image is a black image,
The display device according to claim 1. The display position changing unit performs the change at a constant time interval.
The display device according to claim 1.

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