JPH11109936A - Display controller and display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display an image on a display screen while considering the distance between a person viewing a display and the display screen by measuring the distance between the position of the person viewing the screen and the screen and revising the display image displayed on the screen based on the distance. SOLUTION: The light rays such as infrared rays with which the person viewing the screen is irradiated from a light emission part of a distance sensor 11 are reflected and received by a light receiving part. The light receiving part outputs it as the change of output voltage, output current or resistance value to impart it to a control part 12 through an A/D converter and an encoder. The control part 12 obtains the distance between the person and the screen by measuring the change of output value based on a light receiving intensity, or the time from light emission by the light emission part until reflected light arrives at the photodetector. The control part 12 refers to the data in a storage part 13 by using the distance obtained based on the output from the distance sensor 11 to decide the magnified rate of the display screen. A size conversion part 14 magnifies/reduces the image to be displayed on a display part based on instructions from the control part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for controlling display of images, characters, and the like.

[0002]

2. Description of the Related Art Presently, display devices for displaying images such as images, graphics, and characters on a screen are used in various fields. In addition, the size can be as small as 5 inches, which is used for car navigation, or as large and small as a large display device set on the side of a building or a display device incorporated in a vending machine. Also, various types of displays such as CRTs, LCDs, PDPs, and LEDs are used for the display portion according to the intended use.

[0003]

In these display devices, the distance between the position of the viewer and the screen is generally not strictly fixed. Is provided with a certain width.
However, if the viewer is outside the range and is too close or too far from the screen, the screen becomes difficult to see.

For example, in the case of a large display device, if the distance between the position of the viewer and the screen is too short, the displayed image is too large to know what is being displayed. In addition, the brightness of the screen is too strong, and the display screen is too dazzling. Alternatively, if the distance is too long, the image becomes small or the brightness is low, making it difficult to see.

When the contents of the displayed screen are switched one after another, the switching speed is set so as to be optimal when viewed at an average distance. I don't know what is displayed because I feel the switching is fast.

As described above, in the conventional screen display method, the image is displayed irrespective of the distance between the viewer and the display screen. Therefore, there are various problems depending on the distance between the viewer and the screen. there were.

[0007] It is an object of the present invention to provide a display control device and a display method which solve the above problems.

[0008]

A display control device according to the present invention controls an image display of a display device for displaying an image, and includes a distance measuring means and a display changing means.

The distance measuring means measures the distance between the position of the viewer and the screen. The display change means changes a display image displayed on the screen based on the distance. The change of the display image by the display change unit changes the size of the display image based on the distance between the screen and the position of a person measured by the distance measurement unit, for example. Alternatively, the luminance of the display image is changed based on the distance. Alternatively, the switching speed of the display image is changed based on the distance. Further, a configuration in which the content of the display image is changed based on the distance is also within the scope of the present invention.

Further, the display control device according to the present invention further comprises a correspondence storage means for storing the correspondence between the distance and the display image to be changed, and the display change means refers to the correspondence storage means based on the distance. It is also possible to adopt a configuration in which the above change is made.

Furthermore, an image display device provided with each of the above means is also applicable to the present invention. According to the present invention, the distance between the position of the person watching the screen and the screen is measured by the distance measurement means, and based on the distance, the image display control means
Since the screen display is controlled, an image display that is optimal for the distance between the viewer and the screen, for example, an image display converted to a size corresponding to the distance, a display luminance corresponding to the distance It is possible to perform switching to the displayed image, the image display converted to the switching speed corresponding to the distance, or the image display of the display content corresponding to the distance.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A display control device according to a first embodiment of the present invention will be described below. The display control device according to the first embodiment measures a distance between a person who views a display screen and the screen, and changes the size of a display image displayed on the screen based on the measured distance.

FIG. 1 is a block diagram showing a configuration of a display control device 10 according to the first embodiment. In FIG. 1, a display control device 10 is connected to a display unit 1 having a display screen, and controls a display image displayed on the display unit 1 by processing image data supplied to the display unit 1. is there.

The display unit 1 is a CRT, LCD, PDP, LE
D and the like, and displays an image on a screen based on signals and data transmitted from the display control device 10.

The display control device 10 includes a distance sensor 11,
A size conversion unit for changing the display size of an image displayed on the screen; a storage unit for storing data representing the relationship between the distance and the display size; and a display unit, a distance sensor, and a size conversion unit. The control unit 12 is provided. The distance sensor 11 is for measuring the distance between the person watching the screen of the display unit 1 and the screen, and is, for example, a photoelectric sensor including a light emitting unit and a light receiving unit. In the distance sensor 11, a light emitting unit and a light receiving unit are paired, and light beams such as infrared rays emitted from the light emitting unit to a person viewing the screen are reflected and received by the light receiving unit. The light receiving section outputs this as a change in output voltage, output current or resistance value, which is an A / D converter,
It is provided to the control unit 12 via the encoder. Control unit 1
In step 2, the distance between the person and the screen is obtained by measuring the change of the output value based on the received light intensity or the time from the emission of the light beam by the light emitting unit to the reflected light reaching the light receiving unit. The control unit 12 controls the entire display control device 10, and uses information on the distance between the person who is looking at the screen and the screen obtained from the distance sensor 11 and the distance stored in the storage unit 13 described later. The display magnification of the image to be displayed on the screen is determined based on the relationship between the display magnification and the magnification of the display screen, and the display magnification is instructed to the size conversion unit 14. Storage unit 1
Reference numeral 3 denotes data for storing the relationship between the distance and the display size. The control unit 12 refers to the data in the storage unit 13 using the distance obtained based on the output from the distance sensor 11, and displays the display screen. To determine the magnification. Size converter 14
Performs enlargement / reduction of an image displayed on the display unit based on an instruction from the control unit 12.

FIG. 2 is a diagram showing an example of data representing the relationship between the distance and the display size stored in the storage section 12. As shown in FIG.
In the case of FIG. 2, for example, the display magnification with respect to the distance and the original image size is 0.9 times the original image size when the distance between the viewer and the screen is 1 m, 1.0 times when the distance is 2 m, and 1.times. 1 times,
・ ・ When the distance increases, the image displayed on the screen is enlarged and displayed accordingly. Note that the data indicating the relationship between the distance and the display size and the relationship between the distance in the storage unit in each embodiment described below is an example, and these data depend on the type and size of the method of the display unit, the purpose of use, the installation environment, and the like. It changes greatly. In the display control device according to each embodiment, it is possible to cope with the difference in conditions such as the method of the display unit to be connected simply by changing the data of the relationship between the distance in the storage unit and the conversion of the display image based on the distance. Yes, there is no need to change other parts of the display control device such as changing the firmware of the control unit. Note that, when a person who is watching the screen approaches and the display image is enlarged and displayed, a portion that is enlarged and protrudes from the screen is deleted. However, depending on the type of the displayed image, deleting the display image may cause a problem. In this case, the original image is displayed on the display unit 1 so that the original image does not protrude from the screen even if it is enlarged.
Can be dealt with by setting the screen smaller than the screen in advance, or by setting the screen not to be enlarged to a certain size or more.

FIG. 3 is a diagram showing an example of the enlargement processing of the original image in the size conversion section 14 in FIG. As shown in FIG. 3, the size conversion unit 14 performs an image enlargement process by performing a complementation process of the image data on the given original image at a display magnification instructed by the control unit 12. For example, in FIG. 3, when the size of the original image is changed to four times, in addition to the pixel data indicated by the black dots in FIG. The data of the enlarged image of 4 times is generated. When the original image is reduced, on the contrary, the pixel data of the original image is thinned out to generate data of the reduced image.

Now, in the configuration as shown in FIGS.
When there is a person looking at the screen in front of the display unit 1, light is emitted from the light receiving unit of the distance sensor 11, and the reflected light is received by the light receiving unit. A change in current value or the like based on the received light beam is output from the light receiving section, and this is given to the control section 12 via an A / D converter or an encoder as information on the distance between the person watching the screen and the screen. Can be When there are a plurality of persons watching the screen, one of the plurality of persons is arbitrarily selected and the distance to the person is measured by the distance sensor 11 or the irradiation angle of the light beam from the distance sensor 11 is determined. It is installed in a direction, and measures by measuring only the distance to a person in this direction. Alternatively, a distance sensor 11 that can detect the positions of a plurality of persons, for example, a pressure sensor instead of the above-described optical sensor is installed on the floor near the screen of the display unit 1, and the distance between each person near the screen and the screen Is calculated, and this is treated as the distance between the person watching the screen and the screen.

Using this output, the control unit 12 obtains the distance between the position of the person watching the screen and the screen, and obtains the display magnification by referring to the relationship between the distance and the magnification in the storage unit 13 based on the distance. For example, if the distance between a person and the screen is 4m,
From the relationship between the distance and the display magnification shown in FIG. 2, 1.2 is obtained as the display magnification, and this is instructed from the control unit 12 to the size conversion unit 14. The size conversion unit 14 performs storage processing on the original image based on this instruction, and generates image data with a magnification of 1.2 times. This is output to the display unit 1 via the control unit 12, and an image 1.2 times the original image is displayed on the screen of the display unit 1.

When the person watching the screen moves and the distance to the screen becomes 1 m, the output of the distance sensor 11 changes accordingly, and in response to this, the control unit 12 causes the storage unit 13 From the relationship between the distance and the magnification stored in the memory, 0.9 is determined as the display magnification, and this is calculated by the size conversion unit 14.
To instruct. In response to this, the size conversion unit 14 thins out the data of the original image to generate image data with a display magnification of 0.9 times. The image data is output to the display unit 1 via the control unit 12, and an image having a magnification of 0.9 times the normal image is displayed on the screen of the display unit 1.

As described above, in the first embodiment, the size of the image displayed on the screen changes according to the distance between the screen and the viewer, and a display suitable for the distance is displayed. Converted to an image. For those who look at the display on the screen,
Regardless of the distance to the screen, the screen is not difficult to see.

Next, a display control device according to a second embodiment will be described. The display control device according to the second embodiment measures the distance between the position of a person viewing the display screen and the screen, and changes the brightness of the display image based on this distance, as in the first embodiment.

FIG. 4 is a block diagram showing the configuration of the display control device 20 according to the second embodiment. The display control device 20 of FIG. 4 is connected to the display unit 1 having a display screen, processes image data displayed on the display unit 1,
This controls the luminance of the display image.

The display control device 20 includes a distance sensor 21,
A brightness conversion unit 2 for changing the brightness of the image displayed on the display unit 1
4. A storage unit 23 for storing data representing the relationship between the distance and the display luminance, and a control unit 22 for controlling the display unit 1, the distance sensor 21, and the luminance conversion unit 24. The distance sensor 21 is the same as the distance sensor 11 in FIG. 1 and measures the distance between the screen of the display unit 1 and a viewer.
The control unit 22 controls the entire display control device 20, determines the display luminance of the screen using the distance measured by the distance sensor 21, and instructs the luminance conversion unit 24 on the luminance of the image. The storage unit 23 corresponds to the storage unit 13 of FIG. 1 and stores data indicating a relationship between a distance between a person watching the screen and the screen and a luminance of a display image. The control unit 22 refers to the data in the storage unit 23 using the distance data output from the distance sensor 21 and obtains the brightness of the display screen. The brightness conversion unit 24 processes the display image based on an instruction from the control unit 22 to change the brightness.

FIG. 5 is a view showing an example of data representing the relationship between the distance and the display luminance stored in the storage section 23. As shown in FIG. In the case of FIG. 5, for example, if the luminance of the original image is 1, the distance and the display luminance ratio are 0.9 (90%) when the distance between the viewer and the screen is 1 m, and 1.0 when the distance is 2 m. (100%), 3
When the distance is m, the luminance of the image displayed on the screen increases as the distance increases, such as 1.1 (110%). Note that the relationship between the distance and the luminance is also an example, and changes variously depending on the type of the display unit 1 and the installation environment.

FIG. 6 is a diagram showing an example of a luminance conversion process in the luminance conversion section 24 of FIG. FIG. 6A shows that the display unit 1 is LE.
The luminance conversion process in the case of the D system is shown. In the case of an LED monitor, the conversion of luminance is performed by using the fact that the display luminance increases in proportion to the amount of current applied to each pixel. As shown in FIG.
In the case where the display unit 1 is of the LED type, the amount of current applied to the display unit 1 is controlled by the current control unit 25 based on the designation of the display luminance from the control unit 22 to change the display luminance.

FIG. 6B shows a luminance conversion process performed by the luminance conversion unit 24 corresponding to the case where the display unit 1 is not of the LED type.
Shown in FIG. 6B shows that the display unit is a CRT, LCD, or PD.
FIG. 6 shows luminance conversion processing corresponding to a display method such as P, LED, etc., and alternately switches between an original image and an undisplayed image in which nothing is displayed as shown in FIG. Make changes. In this case, for example, the luminance is set to 5
When the brightness is set to 0% (luminance ratio 0.5), if the image data of the original image is image a and the image data of the undisplayed image is image b, the image data of a and b are alternately displayed. By sending it to Part 1, the standard 25% (brightness ratio 0.
In the case of 25), the image data is switched between a, b, b, and b to transmit the image data, thereby realizing the image display with the target luminance. In the brightness conversion processing of FIG. 6B, the brightness of the image can be lower than that of the original image, but it is difficult to increase the brightness. The image with the maximum brightness to be displayed is given.

Now, in the configuration as shown in FIGS.
When a person looks at the screen of the display unit 1, the distance sensor 2
1 emits light from the light emitting unit to the viewer, receives the reflected light, and outputs an output corresponding to the distance to the control unit 22.

Using this output, the control unit obtains the distance between the person and the screen, and uses this distance to determine the display luminance of the image displayed on the screen by referring to the relationship between the distance and the luminance in the storage unit 23. For example, assuming that the distance between the person and the screen is 4 m, 1.2 is obtained as the luminance ratio of the display luminance from FIG. 5, and this is instructed from the control unit 22 to the luminance conversion unit 24. The brightness conversion unit 24 adjusts the applied current to the display unit 1 or switches the screen, and outputs the adjusted current to the display unit 1 via the control unit 22. Thus, the original image is displayed on the screen of the display unit 1. An image with a luminance 1.2 times as large as that of the image is displayed.

When a person watching the screen moves from one place to another and the distance from the screen becomes 1 meter, the output of the distance sensor 21 changes correspondingly.
2 obtains 0.9 as the luminance ratio of the display screen from the relationship between the distance in the storage unit 23 and the magnification, and instructs the luminance conversion unit 24 of this. In response to this, the luminance conversion unit 24 adjusts the applied current and image switching, and displays the 0.9% of the original image on the display unit 1.
An image with double display brightness is displayed.

As described above, in the second embodiment, the brightness of the image projected on the screen changes according to the distance between the screen and the viewer, and a display image having a brightness suitable for the distance is obtained. Is converted. Therefore, the viewer of the display on the screen does not make the screen too dazzling or too dark regardless of the distance to the screen.

Next, a display control device according to a third embodiment will be described. The display control device according to the third embodiment controls the content of the image to be displayed to be switched at a constant speed, and the distance between the person who views the display screen and the screen as in the first and second embodiments. Is measured, and the switching speed of the display image is changed based on the measured distance.

FIG. 7 is a block diagram showing the configuration of the display control device 30 according to the third embodiment. The display control device 30 in FIG. 7 is connected to the display unit 1 having a display screen, switches image data to be supplied to the display unit 1, and controls the switching speed of the display image on the display unit 1. .

The display control device 30 includes a distance sensor 31,
Speed conversion unit 3 for changing the brightness of the image displayed on display unit 1
4, a storage unit 33 for storing data indicating the relationship between the distance and the switching speed, and a control unit 32 for controlling the display unit 1, the distance sensor 31, and the speed conversion unit 34. this house,
The distance sensor 31 is the distance sensor 11 of FIGS.
As in the case of 21, the distance between the screen of the display unit 1 and the position of the viewer is measured, and the distance is notified to the control unit 32. Control unit 3
Reference numeral 2 designates an instruction to each part in the display control device 30, and
0 is controlled. The control unit 32 determines the switching speed of the image to be displayed on the display unit 1 using the distance between the person watching the screen detected by the distance sensor 31 and the screen, and sends the switching speed to the speed conversion unit 34. To switch the image according to. The storage unit 33 stores data indicating the relationship between the distance and the display time of the display image. The control unit 32 stores the data in the storage unit 33 using the distance obtained based on the output from the distance sensor 31. See,
Determine the switching speed of the display screen. Speed converter 34
Performs switching of image data to the display unit 1 based on an instruction from the control unit 32, and controls switching speed of a display image.

FIG. 8 is a diagram showing an example of data representing the relationship between the distance stored in the storage unit and the display time for displaying one type of image. In the case of FIG. 8, for example, when the distance between the viewer and the screen is 1 m, one image is displayed for 6 seconds and then changed to the next image in the case of the distance and the display time. The time to perform this one display is 5 seconds when the distance is 2 m, 4 seconds when the distance is 3 m,... When the distance increases, the display time displayed on the screen is shortened accordingly, and the switching speed of the display screen is reduced. Be faster.

FIG. 9 is a diagram showing an example of speed conversion processing by the speed conversion unit 34 of FIG. In FIG. 9, switching of five image data of images 1 to 5 is performed. As shown in FIG. 9, in the speed conversion unit 34, switching of the output of the image data to the display unit 1 is controlled by the timer 35. . The timer 35 sets a switching time of image data according to an instruction from the control unit 32, and sequentially changes and outputs image data to the display unit 1 every time the switching time is reached. When the setting of the halfway display time is changed by the control unit 32, the type of image data to be displayed on the display unit 1 is changed based on the change time. For example, if the time designation from the control unit 32 is 5 seconds, the timer 35 sets the control unit 3 for the first 5 seconds.
The data of the image 1 is continuously output to the display unit 1 via the display unit 2, and after 5 seconds, the data is changed to the next image data 2 and output, and thereafter, the image 3, the image 4, the image 5, and the image data are changed every 5 seconds. Is changed to return to the image 1 after the image data 5 and output. On the way, for example, while the data of the image 3 is being output, the control unit 32
Is changed to 3 seconds, the data of the image 3 is output for 3 seconds, and then the images 4 and 5 are output to the display unit 1 for 3 seconds each. Thus, the speed converter 34
Converts the change speed of the image displayed on the display unit 1 based on the instruction of the control unit 32.

Now, in a configuration as shown in FIGS. 7 to 9, when a person looks at the screen of the display unit 1, the distance sensor 31 irradiates the person with a light beam from the light emitting unit, and the reflected light is Is received. Then, the output corresponding to the distance is output to the control unit 32.
To do.

From this output, the control unit 32 obtains the distance between the person and the screen, and uses this distance to refer to the relationship between the distance in the storage unit 33 and the display time of one image. That is, the switching speed of the display screen is obtained. For example, if the distance between the person and the screen is 4 m, the control unit 32 refers to the storage unit 33 based on the distance and sets the display time to 3 m.
Find seconds. Then, this is notified to the display switching unit 34, and the display switching unit 34 receives the notification and switches the data of the display image such as image 1, image 2, ... to the display unit 1 every three seconds. Assuming that the person watching the screen moves halfway and the distance between the person and the screen becomes 1 m, the output from the distance sensor 31 to the control unit 32 changes. A display time of 6 seconds corresponding to a distance of 1 m is obtained from the data in 33 and instructed to the display switching unit 34, and this is set in the timer 35 in the display switching unit 34, and the subsequent switching of image data is performed every 6 seconds. Go on.

As described above, in the third embodiment, the optimum screen switching speed is selected according to the distance between the viewer and the screen viewer, and the display screen is switched according to this speed. Does not switch images too quickly even if the distance from the screen is too short.

Next, a display control device according to a fourth embodiment will be described. The display control device according to the fourth embodiment measures the distance between a person who views a display screen and the screen, and changes the content and type of an image displayed on the screen based on the measured distance.

FIG. 10 is a block diagram showing a configuration of a display control device 40 according to the fourth embodiment. The display control device 40 of FIG. 10 is connected to the display unit 1 having a display screen, and determines the type of display image to be displayed on the screen based on the distance between the person watching the screen of the display unit 1 and the screen. change.

The display controller 40 includes a distance sensor 41,
An image switching unit 44 that switches the type of image displayed on the display unit 1; a storage unit 43 that stores data indicating the relationship between the distance and the type of display image; and the display unit 1 and the distance sensor 41
And a control unit 42 for controlling the image switching unit 44. Among them, the distance sensor 41 is the same as the distance sensor in each of the embodiments described above, and is the same as the display unit 1.
It measures the distance between the screen and the viewer.

The control section 42 controls the entire display control device 40, and controls the display section 1 detected by the distance sensor 41.
The type of image content to be displayed on the screen is determined based on the distance between the person watching the screen and the screen, and the type of image data to be sent to the display unit 1 is instructed to the image switching unit 44. The storage unit 43 stores data indicating the relationship between the distance and the type of display image. The control unit 42 uses the distance obtained based on the output from the distance sensor 41 to store the data in the storage unit 43. To determine the type of image content to be displayed on the screen. The image switching unit 44 switches the data of the display image to be sent to the display unit 1 based on an instruction from the control unit 42.

FIG. 11 is a diagram showing an example of data representing the relationship between the distance stored in the storage section 43 and the type of display image. In the case of FIG. 10, for example, when the distance is 1 m, the displayed contents are “cat”, when 2 m, “cat”, when 3 m, “chicken”, 4 m, 5 m, “kame” and “inu”, respectively. Is controlled so that the display unit 1 performs the display. The type of image displayed on the display unit 1 such as "cat" and "cat" may be a still image or a moving image.

FIG. 12 is a diagram showing an image switching process in the image switching section 44 of FIG. As shown in FIG. 12, the image switching unit 44 has a configuration including a changeover switch 45, and switches image data to be sent to the display unit 1 in accordance with an instruction from the control unit 42. For example, if the distance between the person watching the screen and the screen is 1 m, the control unit 42 determines that the image displayed on the display unit 1 is a “cat” by the image switching unit 44.
And the image switching unit 44 receives the instruction.
The data of the image 1 which is the data of the “cat” is output to the display unit 1 as the display data to be output to the display unit 1. When the distance between the person watching the screen and the screen changes to 2 m, the control unit 42 instructs the image switching unit 44 to display the screen of “Ushin”, and the image switching unit 44 receives the “Ushin”. Is output to the display unit 1 as data corresponding to "".

Now, in a configuration as shown in FIGS.
Detects the distance between the person and the screen, and outputs to the control unit 42 based on the distance.

Based on this output, the control section 42 makes the storage section 43
The display unit 1 refers to the relationship between the distance in the area and the type of display image.
To find the image content to be displayed. For example, assuming that the distance between the person and the screen is 3 m, a “back” is obtained as a display image from FIG. 11, and this is instructed from the control unit 42 to the image display switching unit 44. The image display switching unit 44 displays the image 3 corresponding to the image data on the display unit 1.
Send to

When the distance between the person and the screen of the display unit 1 becomes 4 m when the person moves, the output of the distance sensor 41 changes correspondingly. From the relationship between the distance of the image and the displayed image,
This is instructed to the image switching unit 44. In response to this, the image switching unit 44 sends the image 4 which is the image data corresponding to the “Kame” to the display unit 1.

As described above, in the fourth embodiment, the type of image displayed on the screen is changed according to the distance between the screen and the viewer, and a different image is displayed to the viewer. Can be shown. If this is used as an advertisement, for example, a display according to the distance to the viewer of the screen, for example, if the distance is large, only the outline of the advertisement is shown,
When a person who looks at the screen approaches the screen with more interest, more detailed information can be displayed on the screen, and the screen can be more noticed. Alternatively, if this is used for a warning display, a detailed warning corresponding to the distance to a person can be issued, and the person can be made to pay more attention to the screen.

FIG. 13 shows another embodiment of the image display devices 10, 20, 30, and 40 in each of the embodiments described above. In the conventional display control devices, the size conversion unit 1
4, a display change unit that processes and converts the display data of the display unit 1 such as the brightness conversion unit 24, the speed conversion unit 34, and the image switching unit 44, converts the converted image data into the control units 12, 2,
It was sent to the display via 2, 32 or 42. On the other hand, the display control device 50 shown in FIG. 13 is provided with means for directly sending the converted image data to the display unit 1 in the display change unit 54 so that the image data can be sent directly without going through the control unit 1. It was done. With the configuration as shown in FIG. 13, the load on the control unit 52 can be reduced, and data can be sent directly to the display unit, so that high-speed processing can be supported.

The display control device according to each of the embodiments described above changes one element of a display image, for example, only the size of the image, based on the distance between the viewer and the screen. However, the present invention is not limited to this, for example, both the size and brightness of the image, or the switching speed of the image size and display according to the distance between the person and the screen, all of the contents of the image It is also possible to adopt a configuration in which the elements of a plurality of display images are changed, such as changing

[0052]

As described above, according to the display control device of the present invention, an image is displayed on the screen in consideration of the distance between the viewer and the display screen.

For example, in the configuration according to the second aspect, the image displayed on the screen is converted into a size suitable for the distance according to the distance between the screen and the person who views the screen. Does not make it difficult to see the screen no matter how large the distance to the screen is.

According to the third aspect of the present invention, an image displayed on the screen is converted into a display image having a luminance suitable for the distance in accordance with the distance between the screen and a person who views the screen. Therefore, the viewer of the display on the screen does not make the screen too dazzling or too dark regardless of the distance to the screen.

Further, according to the configuration of the fourth aspect, the optimum screen switching speed is selected according to the distance between the viewer and the screen viewer, and the display screen is switched according to this speed. Even if the distance to the screen is too short, the switching of images is not too fast.

Further, in the configuration according to the fifth aspect, since the type of image content displayed on the screen changes according to the distance between the screen and the person watching the image, a different image is displayed to the person watching the screen for each distance. Can be shown. Thereby, the person who looks at the screen can be more interested in the screen and can be noticed.

Further, in the configuration according to the sixth aspect, the correspondence between the distance between the viewer and the screen and the display image to be changed is stored in the correspondence storage means. Can be dealt with simply by changing the correspondence stored in the correspondence storage means.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a display control device according to a first embodiment.

FIG. 2 is a diagram illustrating an example of data representing a relationship between a distance and a display size stored in a storage unit.

FIG. 3 is a diagram illustrating an enlargement process of an original image in a size conversion unit.

FIG. 4 is a block diagram illustrating a configuration of a display control device according to a second embodiment.

FIG. 5 is a diagram illustrating an example of data representing a relationship between a distance and display luminance stored in a storage unit.

FIG. 6 is a diagram illustrating the principle of luminance conversion processing of an original image in a luminance conversion unit.

FIG. 7 is a block diagram illustrating a configuration of a display control device according to a third embodiment.

FIG. 8 is a diagram illustrating an example of data indicating a relationship between a distance and a display time stored in a storage unit.

FIG. 9 is a diagram illustrating a configuration example of a speed conversion unit.

FIG. 10 is a block diagram illustrating a configuration of a display control device according to a fourth embodiment.

FIG. 11 is a diagram illustrating an example of data representing a relationship between a distance and a display image stored in a storage unit.

FIG. 12 is a diagram illustrating a configuration example of an image switching unit.

FIG. 13 is a diagram showing another form of the display control device in each embodiment.

[Explanation of symbols]

 1 display unit 10, 20, 30, 40, 50 display control device 11, 21, 31, 41, 51 distance sensor 12, 22, 32, 42, 52 control unit 13, 23, 33, 43, 53 storage unit 14 size Conversion unit 24 brightness conversion unit 34 speed conversion unit 44 image switching unit 54 display conversion unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09G 5/36 520 G09G 5/36 520E

Claims (8)

[Claims] 1. A display control device for controlling an image display of a display device for displaying an image, comprising: a distance measuring means for measuring a position of a person watching a screen and a distance from the screen; A display control device comprising: a display change unit that changes a display image displayed on a screen. 2. The display control device according to claim 1, wherein the display change unit changes the size of the display image based on the distance. 3. The display control device according to claim 1, wherein the display change unit changes the brightness of the display image based on the distance. 4. The display control device according to claim 1, wherein the display change unit changes a switching speed of the display image based on the distance. 5. The display control device according to claim 1, wherein the display change unit changes the content of the display image based on the distance. 6. A correspondence storage means for storing a correspondence between the distance and a display image to be changed, wherein the display change means performs the change by referring to the correspondence storage means based on the distance. Claims 1, 2, 3, and 4
Or the display control device according to 5. 7. A display means for displaying an image, a position of a person who looks at a screen of the display means, a distance measuring means for measuring a distance from the screen, and a display displayed by the display means based on the distance. A display device, comprising: display change means for changing an image. 8. A display method for displaying an image on a screen, comprising: measuring a distance between a position of a viewer of the screen and the screen; and changing a display image displayed on the screen based on the distance. The display method characterized by the above.