JP2002358074A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which uses a picture obtained by sampling an original picture (still picture) to realize display of high quality. SOLUTION: A conversion part 30 generates sampled picture data D21 to D24 from original picture data D1 related to an original picture P1 which is a still picture. A switching part 50 switches sampled picture data D21 to D24 at switching intervals T1 to T4 to output them as display picture data D3. The switching intervals T1 to T4 are set to integral multiples of a field period. A display part 70 displays a picture P3 corresponding to the display picture data D3 on a screen 71.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device capable of displaying high quality images using an image obtained by sampling an original image (still image).

[0002]

2. Description of the Related Art In recent years, image systems for handling still images have become widespread due to improvements in performance of digital cameras, image display capabilities in personal computers, and the like. For example, in an image file system, a printing system, an ultra-high resolution display system, etc., the information amount of a still image, particularly the resolution, has been improved year by year.

FIG. 8 is a schematic diagram for explaining a conventional display device 1P. In the conventional display device 1P, the display controller 60P stores and manages high-resolution original image (still image) data in the storage unit 10P. Such original image data is captured through an imaging device such as the digital camera 101P, a recording medium such as a magnetic disk, an external storage device, a scanner, a communication line, and the like, and includes a high-definition computer graphic image.

Further, the display controller 60P reads out a still image from the storage unit 10P via the reading unit 20P, controls the display unit 70P, and displays the still image on the display device 70P.
It is displayed on the P screen 71P. The screen 71P is, for example, CR
Various display devices such as T and LCD are used, and which display device is used, that is, the resolution of the screen 71P is selected according to the use of the display device 1P.

[0005] By the way, due to the improvement in performance of digital cameras and the like, an image of a super-resolution having a sufficient number of pixels and exceeding the resolution of a display device has been increasingly used as the original image data. On the other hand, in the conventional display device 1P, the resolution of the screen 71P is
It is predetermined by the number of pixels of P. Therefore, the display controller 60P reduces the original image by sampling the original image according to the resolution of the screen 71P, and the reduced image is displayed on the screen 71P. Note that the original image can be reduced to any size smaller than the size of the screen 71P.

Further, Japanese Patent Application Laid-Open No. H11-95715 discloses that
An example of a method for displaying bitmap image data having a high-density dot configuration on a dot matrix display having a large screen having a low-density dot configuration is disclosed. In such a display method, a plurality of adjacent dots on the original image are grouped, and each group is assigned to each dot on the display. Thereby, the original image data is developed on the screen of the display. Then, data of one dot is selected from data of a plurality of dots included in one group in accordance with a predetermined selection order rule, and the data of the selected one dot is supplied to one dot of the display to drive the display. By repeating such a selection operation at high speed, an image corresponding to the original image is displayed. At this time, 1
The display time for the screen (one frame) is divided, and the data of a plurality of dots in one group is supplied to the display drive for each of the divided periods.

[0007]

As described above, in the conventional display device 1P, when the resolution of the obtained original image (data) is higher than the resolution (number of pixels) of the screen 71P, the original image is sampled and displayed. . For this reason, the resolution of the image displayed on the screen 71P is reduced according to the number of pixels of the screen 71P. In addition, aliasing components due to sampling occur as moiré (aliasing distortion), which degrades image quality. The reduction in resolution and the occurrence of moiré are remarkable when the original image is reduced to a size smaller than the screen 71P.

In the display method disclosed in the above publication, the above selection operation is repeated at high speed, so that information of adjacent pixels is averaged by a specific one dot. Therefore, an LPF (low-pass filter) effect of reducing moire (aliasing distortion) and the like can be obtained. However, it is considered that the resolution cannot be avoided even by the display method.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a display device capable of displaying a high quality image using an image obtained by sampling an original image (still image).

[0010]

According to a first aspect of the present invention, a display device obtains original image data relating to an original image of a still image, performs a sampling process on the original image data, and has different sampling target pixels. A conversion unit that converts and outputs a plurality of sampled image data, a switching unit that switches the plurality of sampled image data at a switching interval set to an integral multiple of a field cycle and outputs the display image data, and a screen. And a display unit for displaying an image corresponding to the display image data on the screen.

A display device according to a second aspect of the present invention is the display device according to the first aspect, wherein the sampling process samples the first pixels arranged at a predetermined pitch in the original image to form a first pixel. A first sampling process corresponding to a process of acquiring a sampled image;
A second sampling process corresponding to a process of generating a second sampled image by sampling a second pixel in the original image separated by a distance equal to or less than the predetermined pitch from the first pixel; Includes sampled image data relating to the first and second sampled images.

A display device according to a third aspect is the display device according to the first or second aspect, wherein the plurality of sampled image data include one and another sampled image data,
The switching unit outputs the one sampled image data as the display image data at a higher frequency than the other sampled image data.

A display device according to a fourth aspect is the display device according to any one of the first to third aspects, wherein the switching interval has the same value for the plurality of sampled image data. is there.

A display device according to a fifth aspect is the display device according to any one of the first to third aspects, wherein the switching interval is set with fluctuation.

A display device according to a sixth aspect is the display device according to the fifth aspect, wherein the fluctuation includes 1 / f fluctuation.

A display device according to a seventh aspect is the display device according to any one of the first to third aspects, wherein at least one of the switching interval and the switching order of the plurality of sampled image data. Is variable.

The display device according to claim 8 is the display device according to claim 7, wherein the original image data includes attribute data relating to an attribute of the original image, and the switching interval and the switching At least one of the order is set with reference to the attribute data.

A display device according to a ninth aspect is the display device according to any one of the first to eighth aspects, wherein the sampling process samples image data of a part of the original image. Generating a plurality of sampled image data.

A display device according to a tenth aspect is the display device according to the first aspect.
10. The display device according to claim 9, wherein the plurality of sampled image data include image data related to an image smaller than the size of the screen.

The display device according to the eleventh aspect is the display device according to the first aspect.
The display device according to claim 9, wherein the plurality of sampled image data include sampled image data in which sampling target pixels partially overlap.

[0021]

<First Embodiment> FIG. 1 is a schematic diagram for explaining a display device 1 according to a first embodiment,
2 and 3 are schematic diagrams for explaining the operation of the display device 1. FIG. As shown in FIG. 1, the display device 1 includes a storage unit 1
0, a reading unit 20, a converting unit 30, an image memory (or a frame memory) 40, and a switching unit 50.
, A display controller 60, and a display unit 70 having a display screen (hereinafter, also simply referred to as a “screen”) 71.

The storage unit 10 includes a large-capacity memory such as a hard disk, and stores image data (hereinafter, also referred to as "original image data") D1 relating to an original image P1 of a still image. The resolution of the original image (still image) P1 is higher than that of the screen 71 (the number of pixels is large). The original image data D1 includes a high-definition computer graphic image and the like, an imaging device such as the digital camera 101, a scanner 10 and the like.
2. a recording medium such as a magnetic disk and an external storage device 103;
The data is stored in the storage unit 10 through the communication line 104 or the like.
The storage unit 10 is managed and controlled by the display controller 60, and outputs the original image data D1 to the conversion unit 30 via the reading unit 20.

The conversion section 30 acquires the original image data D1,
The original image data D1 is subjected to a sampling process to convert the original image data D1 into a plurality of (here, for example, four) sampled image data D21 to D24. And the conversion unit 3
0 indicates that the sampled image data D21 to D24 are stored in the image memory 40.
Output to and store.

Here, as shown in FIG. 2, the original image P1 is represented by a plurality of pixels arranged in a matrix. A sampled image P21 (see FIG. 3) corresponding to the sampled image data D21 is an image obtained by sampling (extracting) a plurality of pixels (or sampling target pixels) e1 in the original image P1. Similarly,
The sampled images P22 to P24 (see FIG. 3) corresponding to the sampled image data D22 to D24 are images obtained by sampling (extracting) a plurality of pixels (or sampling target pixels) e2 to e4 in the original image P1. . In the original image P1, the pixels e1 and e2 are adjacent to each other in the horizontal direction (or the horizontal direction), the pixels e3 and e4 are adjacent to each other in the horizontal direction, and the pixels e1 and e4 are adjacent to each other.
1 and e3 are adjacent to each other in the vertical direction (or vertical direction), and the pixels e2 and e4 are adjacent to each other in the vertical direction.
The pixels e1 to e4 are adjacent to each other in a 2 × 2 matrix.

The pixel e1 has a predetermined pitch (pixel pitch) s1 to s1 in the horizontal, vertical and oblique directions.
The pixels e2 to e4 are arranged in a similar manner at s3. At this time, for example, the pixels e2 to e4 are within the range of the pixel pitch s1 to s3 or less from the pixel e1.
In other words, for example, with respect to the sampled image P21, the sampled image P22 is shifted by half the pixel pitch s1 in the horizontal direction, and the sampled image P23 is shifted by half the pixel pitch s2 in the vertical direction. P24 is shifted by half the pixel pitch s1 in the horizontal direction and by half the pixel pitch s2 in the vertical direction (ie, half the pixel pitch s3 in the oblique direction).

Each of the sampled images P21 to P24 is an original image P1.
Is an image in which one pixel (one sample point) is extracted (sampled) from four pixels (four sample points) serving as a basic unit, and each has information of a quarter of the original image P1. Each of the sampled images P21 to P24 has the original image P1 at 25% (= 1
/ 4) corresponding to the reduced images, and sampled images P21 to P21
24 have the same resolution.

The conversion section 30 converts the pixels e1 to e1 in the original image P1.
A sampling process corresponding to a process of sampling e4 to obtain sampled images P21 to P24 is performed, and sampled image data D21 to D24 are generated from the original image data D1. In addition,
For such a sampling process, for example, a general sampling process using a sampling signal or a sampling clock can be applied. The above-described shift between the sampled images P21 to P24 corresponds to the difference in the phase of the sampling clock (or the phase of sampling) for each of the sampled images P21 to P24,
For example, the phase difference between the sampling clocks for generating the sampled images P21 and P22 is 180 degrees.

Here, for example, the pixel e1 is called a "first pixel", the sampled image P21 is called a "first sampled image",
When the sampled image data D21 is referred to as “first sampled image data” and the sampling process for generating the sampled image data D21 is referred to as “first sampling process”, each of the pixels e2 to e4 is referred to as “second pixel”. , The respective sampled images P22 to P24 correspond to the “second sampled image”, and the respective sampled image data D2
2 to D24 correspond to “second sampled image data”, and each sampling process for generating sampled image data D22 to D24 corresponds to “second sampled process”.

When, for example, nine pixels (sample points) adjacent to each other in a 3 × 3 matrix in the original image P1 are used as a basic unit, the nine sampled images are 1/1 / horizontally and / or vertically. It is shifted by 3 pixel pitch or 2/3 pixel pitch. That is, the pixels of each sampled image corresponding to a plurality of sampled image data have a relationship shifted on the original image P1 by one pixel pitch or less of the sampled image.

The switching unit 50 includes a switching control unit 51 and a switching interval setting unit 52. The switching control unit 51 reads the sampled image data D21 to D21 from the image memory 40.
24, and reads any one of the sampled image data D2.
1, D22, D23 or D24 is output as display image data D3. At this time, the switching control unit 51 acquires the switching intervals T1 to T4 from the switching interval setting unit 52, and the switching control unit 51 (and thus the switching unit 50)
The switching interval T1 for switching the sampled image data D21 to D24
It is switched every T4 (see FIG. 3) and output as display image data D3 (see FIG. 3). The switching interval T1 to T4 is the field period (1/60 second in the case of the NTSC signal) TF
M (m is an integer). Switching interval T1
T4 can be controlled by setting an integer m, which is several seconds at maximum.

Then, the display controller 60 receives the display image data D3, generates a (video) signal including the display image data D3, and outputs the signal to the display unit 70.
Note that this signal is a signal relating to the entire screen 71, and
For example, in the case of a multi-window display described later (see FIG. 6)
Contains data of an image to be displayed on one or a plurality of small screens.

The display unit 70 acquires the signal (and thus the display image data D3), and displays a (sampled) image or a display image P3 corresponding to the display image data D3 on the screen 71. The screen 71 is, for example, a cathode ray tube (CRT: Cath:
ode Ray Tube) and liquid crystal display (LCD: Liquid C)
The display unit 70 includes a driving device for a display screen 71.

More specifically, as shown in FIG. 3, the switching unit 50 and the display unit 70 start displaying the sampled image P21 as the display image P3 at time t1. Then, at time t2 after the switching interval T1 has elapsed from time t1, the display is switched from the image P21 to the sampled image P22. Further, at time t3 after the switching interval T2 has elapsed from time t2, the display is switched from the image P22 to the sampled image P23. Further, at time t4 after the switching interval T3 has elapsed from time t3, the display is switched from the image P23 to the sampled image P24. Thereafter, at time t5 after the switching interval T4 has elapsed from time t4, the display is switched from the image P24 to the sampled image P21. Each switching interval T1 to T4 can be regarded as a display time of each of the images P21 to P24.

At this time, the four sampled image data D21
To D24 need not be stored in the image memory 40 at the same time. For example, the conversion unit 30 may be configured to generate the next sampled image P22 while displaying the sampled image P21. In such a case, the capacity of the image memory 40 can be reduced to two sampled image data,
The display device 1 can be simplified.

In the display method disclosed in the above publication, the display time for one frame is divided, and data is switched for each divided period. For this reason, the display method of the display device 1 is different from the display method of the above publication in the interval at which the image to be displayed is switched.

Now, as described above, each of the sampled images P21 to P21
The information amount of P24 is one-fourth of the original image P1, and the resolution of the sampled images P21 to P24 is lower than that of the original image P1. However, since the visual system is considered to accumulate visual information over time, these four sampled images P
The display image P3 (that is, the sampled images P21 to P2) is switched and displayed repeatedly for a sufficient period of time by the observer.
By paying attention to 4), the original image P1 and a considerable amount of information can be given to the visual system of the observer. Thereby, high-quality display is possible.

That is, by switching the display image P3 on the screen 71 so that the visual system receives the information in accordance with the accumulation timing of the visual information, the observer can apparently switch from the sampled images P21 to P24. Also, an image having a higher resolution than the screen 71 is visually recognized. For this reason, by setting the integer m, and hence the switching intervals T1 to T4, in accordance with the speed at which the human visual system receives information, a high-resolution display can be provided more effectively.

At this time, as described above, the conversion unit 30 converts the plurality of samples so that the pixels of the sampled images P21 to P24 are shifted from the original image P1 by one pixel pitch s1 to s3 or less. Generated image data D21 to D24. For this reason, the display which suppressed the blur of an image is obtained.

By the way, the switching intervals T1 to T4 are set to a plurality of sampled image data D21 to D21 by a common integer m.
The same value may be set for D24 (that is, the sampled images P21 to P24), or may be different depending on the integer m of a different value.

Here, an example in which the switching intervals T1 to T4 are different will be described. The timing at which the visual system receives information may have a certain degree of fluctuation similar to the fluctuation (so-called 1 / f fluctuation) observed in human physiological phenomena (for example, heartbeat, pulse and respiration).

Therefore, by giving the fluctuation factor to the integer m and setting the switching intervals T1 to T4 with the fluctuation, the observer can naturally be compared with the case where all the switching intervals T1 to T4 have the same value. High resolution images can be perceived. The fluctuation includes a random fluctuation and a fluctuation having a regularity such as the 1 / f fluctuation.

In particular, by applying 1 / f fluctuation to the switching intervals T1 to T4, the observer can see the sampled image P21
The switching and repetition of P24 can be more naturally received, and a high-resolution image can be smoothly perceived.

When all of the switching intervals T1 to T4 have the same value, the configuration of the switching unit 50 can be simplified.

The switching order of the sampled images P21 to P24 (in other words, the display order) is not limited to the above-described order of the image P21 → the image P22 → the image P23 → the image P24. For example, the image P21 → the image P24 → the image P22 → The order of the image P23 may be applied. Alternatively, for example, the switching unit 50 (specifically, the switching control unit 51) converts one sampled image data D21 into a switching order of image P21 → image P22 → image P21 → image P23 → image P21 → image P24. Other sampled image data D22
It may be output as the display image data D3 at a higher frequency than D23.

At this time, for example, the resolution may depend on the attribute (property) of the original image P1, and the sampled images P21 to P21 may be used.
It is considered that the image quality (including the apparent resolution) may change depending on the switching order of P24. For this reason, the sampled images P21 are arranged in the order in which more optimal image quality is obtained.
To P24 are preferably switched, and can be implemented by the following configuration.

For example, as shown in FIG. 1, attribute data A1 relating to the attribute of the original image P1 is stored in the storage unit 10 in association with the original image data D1. In other words, the attribute data A1 relating to the attribute of the original image P1 is given to the original image data D1. In addition, as shown in the schematic diagram of FIG. 4, when storing a plurality of (here, three) original image data D <b> 11 to D <b> 13 in the storage unit 10,
Each original image D11 to D13 and corresponding attribute data A11 to
A13 is stored in association with A13.

The conversion unit 30 reads the attribute data A1 together with the original image data D1, and stores the attribute data A1 in the image memory 40 in association with the sampled image data D21 to D24. The switching unit 50 (specifically, the switching control unit 51) reads the attribute data A from the image memory 40.
1, the switching order of the sampled image data D21 to D24 is set with reference to the attribute data A1, and the sampled image data D21 to D24 are switched according to the switching order. At this time, a memory or the like separate from the storage unit 10 and / or the image memory 40 may be provided to store the attribute data A1.

As described above, for example, the sampled image P2
When the conversion unit 30 is configured to generate the next sampled image P22 while displaying No. 1, the conversion unit 30 sets the switching order of the sampled image data D21 to D24 with reference to the attribute data A1. Then, the sampled image data D21 to D24 are sequentially generated according to the switching order.

As described above, by changing the switching order of the sampled images P21 to P24 and setting the switching order for each original image, it is possible to obtain the optimum image quality according to each original image. Alternatively, the switching intervals T1 to T4 may be changed in addition to or in addition to the switching order, and the switching time setting unit 52 (therefore, the switching unit 50) may set the switching intervals T1 to T4 with reference to the attribute data A1. In such a case, the optimum image quality can be obtained.

In the above description, the sampled image P21
The number n (= 4) of .about.P24 corresponds to the reduction ratio 1 / n (= 1/4) of the sampled images P21 to P24 with respect to the original image P1. That is, all of the n sampled images generated with the reduction ratio of 1 / n are used. On the other hand, for example, pixels (sample points) located in an oblique direction on the original image P1
Only two sampled images P21 and P24 composed of e1 and e4 may be used. By thus reducing the number of sampled image data, the conversion unit 30 and the switching unit 50
And the capacity of the image memory 40 can be reduced.

In the above description, the sampled image P21
Although the sample target pixels are different between P24 and P24, the sample target pixels may be partially overlapped (shared) between the sampled images. An example will be described with reference to the schematic diagram of FIG.

In this example, the original image P1 is compressed by three quarters in the horizontal and vertical directions, respectively (therefore, the reduction ratio is about 56%) to generate sampled images P25 and P26. More specifically, 16 pixels (or sample points) e1 to e16 arranged in a 4 × 4 matrix form pixels e1 to e3 and e5.
To e7 and e9 to e11 are sampled to generate a sampled image P25.
1, e2, e4 to e6, e8, e13, e14, e16
Is sampled to generate a sampled image P26. That is, the two sampled images P25 and P26 are both pixels e1, e2, and e.
5, e6.

In response to this, the conversion unit 30 performs a sampling process corresponding to a process of obtaining the sampled images P25 and P26, and generates sampled image data D25 and D26 for the sampled images P25 and P26. . Note that, at this time, sampling phases of pixels that are not common differ between the sampled images P25 and P26.

As described above, by partially overlapping the pixels to be sampled among a plurality of sampled images, it is possible to improve the apparent resolution and to set various reduction ratios. Therefore, for example, the present invention can be applied to the multi-window display shown in the schematic diagram of FIG. Specifically, when small screens 72 and 73 having variable sizes are provided in the screen 71, the reduction ratio is set in accordance with the size of the small screen 72. At this time, the plurality of sampled image data includes image data related to an image smaller than the size (size) of the screen 71, and high-quality display can be obtained on a small screen of multi-window display.

Further, as shown in the schematic diagram of FIG. 7, the conversion unit 30 may be configured to sample a plurality of sampled image data by sampling image data relating to an image P1a of a part of the original image P1. good.

Specifically, the display device 1 displays the original image P1 as the display image P3 as described above, and allows the observer to set a desired range (see the image P1a in FIG. 7) with, for example, a mouse (not shown). Etc. Then, the conversion unit 30 cuts out the data of the image in the designated range from the original image data D1, and samples the cut out image data. Thus, the observer can cut out a notable or important portion or further enlarge / reduce the portion, and can view it with a high-quality display.

Alternatively, as another example, a noticeable portion in the original image P1 is given as attribute data A1, and the conversion unit 30 samples the image data relating to the image P1a by referring to the attribute data A1. It is also possible.

At this time, in the image memory 40, the capacity for the sampled image data corresponding to the partial image P1a is smaller than the capacity for the sampled image data corresponding to the entire original image P1.

[0059]

According to the first aspect of the invention, it is possible to display an image having a higher apparent resolution than the resolution of the sampled image corresponding to the plurality of sampled image data and the resolution of the screen. And high-quality display can be obtained. Note that the smaller the number of the plurality of sampled image data, the smaller the capacity of the memory for storing the plurality of sampled image data can be.

According to the second aspect of the present invention, it is possible to obtain a display in which blurring of an image is suppressed.

According to the third aspect of the invention, it is possible to obtain an optimum image quality according to the original image.

According to the fourth aspect of the invention, the configuration of the switching unit can be simplified.

According to the fifth aspect of the invention, a natural display can be obtained.

According to the invention of claim 6, more natural display can be obtained.

According to the seventh aspect of the invention, it is possible to obtain an optimum image quality according to the original image.

According to the eighth aspect of the invention, it is possible to obtain an optimum image quality for a plurality of original images according to each original image.

According to the ninth aspect, a part of the original image can be displayed with high image quality.

According to the tenth aspect, high-quality display can be obtained on a small screen of multi-window display.

According to the eleventh aspect, it is possible to set various reduction ratios of the sampled image with respect to the original image.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a display device according to a first embodiment.

FIG. 2 is a schematic diagram for explaining an operation of the display device according to the first embodiment.

FIG. 3 is a schematic diagram for explaining an operation of the display device according to the first embodiment.

FIG. 4 is a schematic diagram for explaining an operation of the display device according to the first embodiment.

FIG. 5 is a schematic diagram for explaining an operation of the display device according to Embodiment 1.

FIG. 6 is a schematic diagram for explaining an operation of the display device according to Embodiment 1.

FIG. 7 is a schematic diagram for explaining an operation of the display device according to Embodiment 1.

FIG. 8 is a schematic diagram for explaining a conventional display device.

[Explanation of symbols]

1 display device, 30 conversion unit, 50 switching unit, 51
Switching control unit, 52 Switching interval setting unit, 70
Display unit, 71 screens, 72, 73 small screens, A1, A1
1 to A13 attribute data, D1, D11 to D13 original image data, D21 to D26 sampled image data, D3
Display image data, P1, P11 to P13 original image, P1a
Image, P21 to P26 Sampled image, P3 display image, T1 to T4 switching interval, TF field period, m integer, s1 to s3 pitch.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B057 AA20 BA23 CD09 CD10 CH18 DA16 5C076 AA21 AA22 BA05 BB22 CB01 5C082 AA01 AA27 BA20 BB15 BB25 BB26 BD09 CA34 CA56 CA76 DA55 MM10

Claims (11)

[Claims] 1. A conversion unit that obtains original image data relating to an original image of a still image, performs a sampling process on the original image data, converts the original image data into a plurality of sampled image data having different sampling target pixels, and outputs the sampled image data. A switching unit that switches the plurality of sampled image data at a switching interval set to an integral multiple of a field period and outputs the display image data, and a screen, wherein the display image data is displayed on the screen. And a display unit for displaying an image corresponding to. 2. The display device according to claim 1, wherein the sampling process is a process of sampling a first pixel arranged at a predetermined pitch in the original image to obtain a first sampled image. A corresponding first sampling process, and a second process corresponding to a process of sampling a second pixel in the original image separated from the first pixel by a distance equal to or less than the predetermined pitch to generate a second sampled image. A display device, comprising: a sampling process; wherein the plurality of sampled image data includes sampled image data relating to the first and second sampled images. 3. The display device according to claim 1, wherein the plurality of sampled image data includes one and another sampled image data, and the switching unit includes the one sampled image data. A display device that outputs the sampled image data as the display image data more frequently than the other sampled image data. 4. The display device according to claim 1, wherein the switching interval has the same value for the plurality of sampled image data. 5. The display device according to claim 1, wherein the switching interval is set with fluctuation. 6. The display device according to claim 5, wherein the fluctuation includes 1 / f fluctuation. 7. The display device according to claim 1, wherein at least one of the switching interval and the switching order of the plurality of sampled image data is variable. 8. The display device according to claim 7, wherein the original image data includes attribute data relating to an attribute of the original image, and the at least one of the switching interval and the switching order is the same as the original image data. A display device that is set with reference to attribute data. 9. The display device according to claim 1, wherein the sampling process samples the image data relating to a part of the original image and converts the plurality of sampled image data into a plurality of sampled image data. A display device including a generating process. 10. The display device according to claim 1, wherein the plurality of sampled image data include image data related to an image smaller than the size of the screen. 11. The display device according to claim 1, wherein the plurality of sampled image data includes sampled image data in which sampling target pixels partially overlap. apparatus.