JP2011069914A - Display control device and display control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display control device and a display control method for reducing a memory size required when displaying an image of one frame across a plurality of displays. <P>SOLUTION: An input control part 10 alternately buffers a continuous scan signal in a first buffer 31 and a second buffer 32. An output control part 40 divides the scan signal read from the first buffer 31 or the second buffer 32 at a temporal center position in accordance with the scan order, synchronizes a horizontal synchronization signal with a second synchronization signal obtained by the frequency adjustment in conformity with the display in a first LCD module 51 and a second LCD module 52, outputs the first half scan signal to the first LCD module 51, outputs the second half scan signal to the second LCD module 52 in synchronization with the second synchronization signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display control apparatus that displays images on a plurality of monitors.

  There is a display driving method for displaying images on a plurality of displays (see, for example, Patent Document 1). The above method proposes whether to display the same frame or different frames. In this method, one frame image cannot be displayed on a plurality of displays.

  Recently, there are portable game machines equipped with a plurality of displays. In some event venues, a plurality of displays may be used. In these cases, an image of one frame may be displayed over a plurality of displays. However, in order to perform such control, there is a problem that a large memory is required.

JP 2005-352450 A

Conventionally, in order to display one frame across a plurality of displays, there is a problem that a large memory for storing image data is required.
The present invention has been made to solve the above problems, and provides a display control device and a display control method capable of reducing the memory size required when displaying an image of one frame across a plurality of displays. The purpose is to provide.

  In order to achieve the above object, the present invention provides a signal dividing means for dividing an image signal into N (N is a natural number) for each signal corresponding to one scanning line, and a synchronizing signal of the image signal is matched with a display means. Synchronization signal generating means for generating a frequency-adjusted synchronizing signal, and output control means for outputting the N image signals divided by the signal dividing means in synchronization with the synchronizing signals generated by the synchronizing signal generating means, respectively. It was made to comprise.

  As described above, according to the present invention, each signal corresponding to one scanning line is divided according to the number of display means, and the frequency of the synchronizing signal is adjusted according to the display means for displaying an image. The generated image signal is output in synchronization with the generated synchronization signal.

  Therefore, according to the present invention, an image signal obtained by dividing the scanning line and its synchronization signal can be obtained, and by outputting these signals to a plurality of displays, an image of one frame can be displayed across the plurality of displays. In addition, since the image signal is divided for each scanning line, it is possible to provide a display control device and a display control method that require a small memory size for this processing.

The circuit block diagram which shows the structure of one Embodiment of the display control apparatus concerning this invention. The figure which shows an example of the image | video divided | segmented and displayed by the display control apparatus shown in FIG. The figure for demonstrating the scanning signal buffered by the buffer part of the display control apparatus shown in FIG. The figure for demonstrating the display control operation | movement of the display control apparatus shown in FIG. The figure which shows an example of the image | video divided | segmented and displayed by the display control apparatus shown in FIG. The figure for demonstrating the process divided and displayed horizontally by the display control apparatus shown in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration of a display control apparatus according to an embodiment of the present invention. The display control device includes an input control unit 10, a clock generation unit 20, a buffer unit 30, an output control unit 40, a first LCD module 51, and a second LCD module 52. Here, in order to simplify the description, a case where there are two display units will be described as an example.

  For example, a digital input image signal (luminance signal and color difference signal) is input to the input control unit 10, and an output destination (the first of the buffer unit 30) is output for each signal corresponding to one scanning line (hereinafter abbreviated as scanning signal). The first buffer 31 and the second buffer 32) are switched. That is, the input control unit 10 records the scan signal in the first buffer 31, records the next scan signal in the second buffer 32, and further records the next scan signal in the first buffer 31. Repeat control.

  The clock generator 20 generates a synchronization signal (hereinafter referred to as a second synchronization signal) for reproducing a video by the first LCD module 51 and the second LCD module 52 based on the synchronization signal (hereinafter referred to as a first synchronization signal) of the image signal. Signal).

  Here, the first synchronization signal and the second synchronization signal include a horizontal synchronization signal and a vertical synchronization signal, respectively. However, the clock generation unit 20 performs frequency adjustment on the horizontal synchronization signal. The frequency is adjusted in accordance with the display performed by the first LCD module 51 and the second LCD module 52.

  The buffer unit 30 includes a first buffer 31 and a second buffer 32. Each of the first buffer 31 and the second buffer 32 is for buffering one scanning signal, and the scanning signal output from the input control unit 10 is alternately given for each scanning signal. After buffering, the data is output to the output control unit 40.

  The output control unit 40 alternately reads the scanning signals buffered in the first buffer 31 and the second buffer 32 one by one, and reads the read scanning signal in the middle position in time (the middle position on the scanning line). ) To generate a first half signal (hereinafter abbreviated as the first half signal) and a second half signal (hereinafter abbreviated as the second half signal).

  Then, the output control unit 40 outputs the first half signal to the first LCD module 51 in synchronization with the second synchronization signal generated by the clock generation unit 20, and simultaneously synchronizes with the second synchronization signal to send the second half signal to the second LCD. Output to module 52.

  The first LCD module 51 and the second LCD module 52 are each a display device using an LCD (Liquid Crystal Display) and have the same resolution. The first LCD module 51 displays an image based on the first half signal and the second synchronization signal, while the second LCD module 52 displays an image based on the second half signal and the second synchronization signal.

  Here, assuming that an image is displayed as shown in FIG. 2A by the input image signal and the first synchronization signal for one frame, the display control device shown in FIG. As described above, the images are displayed on the first LCD module 51 and the second LCD module 52 in half.

  Next, the operation of the display control apparatus having the above configuration will be described in detail. In the following description, in order to make the principle of the present invention easier to understand, as shown in FIG. 3, one scanning line is shown thicker than the actual one, and a video including a number is provided at both ends of each scanning line. And

  First, as shown in FIG. 4A, the input control unit 10 outputs a scanning signal corresponding to the scanning line of the line 1 to the first buffer 31. The first buffer 31 buffers the scanning signal of line 1.

  Subsequently, as shown in FIG. 4B, the input control unit 10 outputs a scanning signal corresponding to the scanning line of the line 2 to the second buffer 32 as shown in FIG. The second buffer 32 buffers the scanning signal of line 2. In parallel with this, the output control unit 40 reads the scanning signal of the line 1 from the first buffer 31 and outputs the first half signal to the first LCD module 51 in synchronization with the second synchronization signal. The signal is output to the second LCD module 52 in synchronization with the second synchronization signal. As a result, an image based on the first half signal of line 1 is displayed on the first LCD module 51, while an image based on the second half signal of line 1 is displayed on the second LCD module 52.

Further, as shown in FIG. 4C, the input control unit 10 outputs a scanning signal corresponding to the scanning line of the line 3 to the first buffer 31 as shown in FIG. The first buffer 31 buffers the scanning signal of line 3. In parallel with this, the output control unit 40 reads the scanning signal of the line 2 from the second buffer 32, synchronizes the first half signal with the second synchronization signal, and outputs it to the first LCD module 51. The signal is output to the second LCD module 52 in synchronization with the second synchronization signal. As a result, an image based on the first half signal of line 2 is displayed on the first LCD module 51, while an image based on the second half signal of line 2 is displayed on the second LCD module 52.
From line 4 onward, the same processing is repeatedly executed to display as shown in FIG.

  As described above, in the display control device having the above configuration, continuous scanning signals are alternately buffered in the first buffer 31 and the second buffer 32. Then, the output control unit 40 divides the scanning signal read from the first buffer 31 or the second buffer 32 according to the scanning order at a temporally middle position, and the frequency of the horizontal synchronization signal is the first LCD module 51 and the second LCD. The first scanning signal is output to the first LCD module 51 in synchronism with the second synchronizing signal adjusted to the display in the module 52, and the second scanning signal is synchronized with the second synchronizing signal. 52 is output.

  Therefore, according to the display control apparatus having the above configuration, an image of one frame can be divided and displayed on the plurality of displays 51 and 52 only by including the two buffers 31 and 32 capable of buffering one scanning signal. .

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. Further, for example, a configuration in which some components are deleted from all the components shown in the embodiment is also conceivable. Furthermore, you may combine suitably the component described in different embodiment.

  As an example, for example, in the above-described embodiment, as shown in FIG. 2, a case where an image of one frame is vertically divided and displayed, that is, a case where the first LCD module 51 and the second LCD module 52 are arranged horizontally is shown. Explained with an example.

  Instead of this, for example, as shown in FIG. 5, one frame of video can be horizontally divided and displayed, that is, the first LCD module 51 and the second LCD module 52 can be arranged vertically. .

  In this case, an image processing unit is provided in the preceding stage of the input control unit 10, thereby performing a process of rotating the image based on the input image signal (FIG. 6A) by 90 degrees as shown in FIG. 6B. Apply. Specifically, an image rotated by 90 degrees based on the input image signal is generated, a scanning signal obtained by horizontally scanning the image is generated, and this is output as an input image signal. This can be realized by supplying the input image signal subjected to the image processing by the image processing unit to the input control unit 10.

Moreover, in the said embodiment, in order to demonstrate easily, the case where it divided and displayed on two displays was mentioned as an example, but it was also possible to apply to three or more displays. In that case, the output control unit 40 divides the scanning signals read from the buffers 31 and 32 into N parts in accordance with the number N of displays. Then, the clock generation unit 20 generates a second synchronization signal in which the frequency of the horizontal synchronization signal of the first synchronization signal is adjusted according to the display on each display, and the output control unit 40 performs N division in synchronization with this. A scanning signal is output to each display.
In addition, it goes without saying that the present invention can be similarly implemented even if various modifications are made without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 10 ... Input control part, 20 ... Clock generation part, 30 ... Buffer part, 31 ... 1st buffer, 32 ... 2nd buffer, 40 ... Output control part, 51 ... 1st LCD module, 52 ... 2nd LCD module.

Claims (6)

Signal dividing means for dividing the image signal into N (N is a natural number) for each signal corresponding to one scanning line;
Synchronization signal generating means for generating a synchronization signal obtained by adjusting the frequency of the synchronization signal of the image signal in accordance with display means;
A display control apparatus comprising: output control means for outputting N image signals divided by the signal division means in synchronization with the synchronization signals generated by the synchronization signal generation means. The signal dividing means includes
First buffer means capable of buffering a signal corresponding to one scanning line;
Second buffer means capable of buffering a signal corresponding to one scanning line;
Recording control means for alternately recording an image signal in the first buffer means and the second buffer means for each signal corresponding to one scanning line;
2. The display control apparatus according to claim 1, further comprising a dividing unit that alternately reads out image signals buffered in the first buffer unit and the second buffer unit in accordance with a scanning order and divides the image signal into N. Furthermore, an image rotation means for generating an image signal obtained by scanning an image obtained by rotating an image based on the image signal is provided.
The display control apparatus according to claim 1, wherein the signal dividing unit divides the image signal generated by the image rotating unit into N for each signal corresponding to one scanning line. A signal dividing step of dividing the image signal into N (N is a natural number) for each signal corresponding to one scanning line;
A synchronization signal generating step of generating a synchronization signal obtained by adjusting the frequency of the synchronization signal of the image signal according to display means;
A display control method comprising: an output control step of outputting the N image signals divided in the signal division step in synchronization with the synchronization signal generated in the synchronization signal generation step. The signal dividing step includes
A recording control step of alternately recording an image signal corresponding to one scanning line in a first buffer and a second buffer capable of buffering the image signal corresponding to one scanning line;
The display control method according to claim 4, further comprising: a division step of alternately reading out image signals buffered in the first buffer and the second buffer in accordance with a scanning order and performing N division. Furthermore, the image rotation process which produces | generates the image signal which scanned the image which rotated the image based on an image signal is provided,
The display control method according to claim 4, wherein the signal dividing step divides the image signal generated in the image rotation step into N for each signal corresponding to one scanning line.

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