JP2002287726A - Method of displaying image, image display device, computer program and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of displaying image by which an image with a luminance lower than that of the preceding image is displayed after the preceding image was displayed for a specified period so as to extend the durable period of the display element, and to provide an image display device, a computer program to realize the above image display device, and a recording medium where the computer program is recorded. SOLUTION: In the main controlling part 1, the image to be displayed is divided into a plurality of regions, selection for whether or not the color conversion to be done is received for every divided region, and the image in the region which is determined to covert colors is subjected to the color conversion process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display method, an image display apparatus, and an image display apparatus for measuring an image display time and displaying an image having a lower luminance than the image when a predetermined time has elapsed. And a recording medium on which the computer program is recorded.

[0002]

2. Description of the Related Art An image display device such as a CRT or PDP displays an afterimage phenomenon called burn-in on a display screen when the same image is continuously displayed on the screen for a long time, and emits light when an image with high luminance is continuously displayed. Display pixels such as a body or a phosphor are consumed. Since the progress of image sticking differs for each dye of the light emitting element,
Even when burn-in occurs only on a part of the screen, the image display device needs to be replaced.

In order to prevent burn-in of an image display device and prolong its useful life, when the displayed content does not change for a certain period of time, as represented by a screen saver, the content is unrelated to the content. A measure is taken to display the moving image and keep changing the displayed contents to prevent the image display device from burning.

[0004] In a conventional screen saver, a method of displaying an image background in black is generally used, and while a processed image is being displayed by the screen saver, the displayed content cannot be confirmed. Therefore, if it is necessary to check the display contents even while displaying the image by the screen saver, instead of using such a screen saver, perform conversion of the display color of the original image such as color inversion. Measures have been taken to prevent image burn-in of the image display device.

[0005]

However, in the above-mentioned prior art, since the color inversion is performed on the image data of the entire screen regardless of the display contents of the screen, the display contents can be understood during the color inversion display. There was a problem that it was difficult.

Further, by simply performing the color inversion processing, the area displayed in black is displayed in white after color inversion.
Despite the effect of preventing burn-in, there is a problem that the effect of suppressing the consumption of the display element is small, and the development of an image display method and a display device that can solve such a problem is desired. Was.

If the user does not want to use the screen saver depending on the time of the day, the user can change the screen saver setting by automatically setting the screen saver to display an image processed by the screen saver after a predetermined time elapses as in the prior art. It was necessary to stop the function, and it sometimes felt annoying.

Further, since the use time of the image display device differs depending on the user, it is not always possible to prevent the consumption of the display pixels to the utmost. It is desirable to be able to display recommended values and change the set values based on these recommended values.

The present invention has been made in view of such circumstances, and by performing color conversion processing on an image of an area selected for color conversion, it is possible to confirm the image content of an unselected area. It is an object of the present invention to provide an image display method, an image display device, a computer program for realizing the image display device, and a recording medium on which the computer program is recorded, which can obtain an image sticking prevention effect.

Another object of the present invention is to realize an image display method, an image display device, and an image display device having a high effect of suppressing the consumption of the display element by further performing a process of lowering the luminance by a predetermined amount. To provide a computer program.

Still another object of the present invention is to reduce the luminance of an image within a range that does not impair the color image of the original image by performing a process of changing the gradation value and reducing the maximum luminance value by a predetermined amount. An object of the present invention is to provide an image display method, an image display device, and a computer program for realizing the image display device.

Still another object of the present invention is to select whether or not to perform a color conversion process for each time period during which an image is displayed, to select whether or not to perform a process for lowering the luminance by a predetermined amount, and to select a gradation value. An image display method and an image display method capable of accepting a selection as to whether or not to perform a process of changing and lowering the maximum luminance value by a predetermined amount, and performing each process according to the selection, thereby reducing a change in setting after the start of use. It is to provide a display device and a computer program for realizing the image display device.

Still another object of the present invention is to provide a display device having a life expectancy calculated based on a maximum value of luminance for each time zone, a maximum luminance of a displayed image, and a time displayed at the maximum luminance. Calculate the recommended value of the maximum luminance value so that the calculated life expectancy of the display element is as equal as possible, and reduce the luminance of the image based on the recommended value to maximize the consumption of the display element after the start of use. It is an object of the present invention to provide an image display method, an image display device, a computer program for realizing the image display device, and a recording medium storing the computer program, which can prevent the image display device.

[0014]

According to a first aspect of the present invention, there is provided an image display method for measuring an image display time and displaying an image having a lower luminance than the image when a predetermined time has elapsed. Divide the image to be displayed into multiple areas,
It is characterized in that selection of whether or not to perform color conversion is received for each of the divided areas, color conversion processing is performed on an image of the area selected to perform color conversion, and the color-converted image is displayed.

An image display device according to a second aspect of the present invention has a means for measuring a display time of an image, a means for determining whether or not a predetermined time has elapsed, and a means for determining whether or not a predetermined time has elapsed. In an image display apparatus including a unit for generating a luminance image and a unit for displaying the generated image, a unit for dividing an image to be displayed into a plurality of regions, and whether to perform color conversion for each of the divided regions And a means for performing a color conversion process on an image in an area selected for color conversion.

According to a third aspect of the present invention, there is provided a computer program for causing a computer to determine whether or not a predetermined time has elapsed, and for causing the computer to generate an image having a lower luminance than the image when the predetermined time has elapsed. Causing the computer to display the generated image.
Causing the computer to divide the image to be displayed into a plurality of regions; allowing the computer to select whether or not to perform color conversion for each of the divided regions; and causing the computer to select the region selected for color conversion. Performing a color conversion process on the image.

According to a fourth aspect of the present invention, a recording medium includes a step of causing a computer to determine whether a predetermined time has elapsed, and a step of causing the computer to generate an image having a lower luminance than the image when the predetermined time has elapsed. Causing a computer to display a plurality of images on a computer-readable recording medium, characterized in that a computer program having a step of causing the computer to display the generated image is recorded. Dividing the image into regions, and causing the computer to accept selection of whether to perform color conversion for each divided region,
Causing the computer to perform a color conversion process on an image in an area selected to be color-converted.

The first invention, the second invention, the third invention, and the fourth invention
According to the present invention, an image to be displayed is divided into a plurality of regions, and a selection as to whether or not to perform color conversion is received for each of the divided regions, and the image in the region selected to be color-converted is subjected to color conversion. Since the conversion process is performed, even when a processed image by the screen saver is displayed, the display content of an unselected area can be confirmed.

In the first invention, the second invention, the third invention, and the fourth invention, in addition to the color conversion processing, processing for lowering the luminance by a predetermined amount is further performed, so that the effect of preventing the consumption of the display element is high. The service life of the image display device can be extended.

Further, in the first, second, third, and fourth inventions, the color image of the original image is changed in order to further perform a process of changing the gradation value and lowering the maximum luminance value by a predetermined amount. It is possible to reduce the brightness of the image within a range that does not impair, thereby preventing the consumption of the display element.

Further, in the first invention, the second invention, the third invention, and the fourth invention, a process of selecting whether or not to perform the color conversion process for each time zone during which an image is displayed, and a process of lowering the brightness by a predetermined amount are described. In order to accept the selection of whether or not to perform the process and whether or not to perform the process of changing the gradation value and lowering the maximum luminance value, for example, the above-described selection is performed according to the usage time of the user of the image display device. If so, the frequency of changing the settings of the screen saver can be reduced, and the user's labor can be reduced.

Further, the life expectancy of the display element calculated based on the maximum value of the luminance for each time zone, the life expectancy of the display element calculated based on the maximum luminance value of the displayed image and the time displayed at the maximum luminance value, and Since the recommended value of the maximum luminance value is calculated as equal as possible, and the luminance of the image is reduced based on the recommended value, the consumption of the display element after starting the image display is maximized. Can be prevented.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. Embodiment 1 FIG. 1 is a block diagram of an image display device according to the present invention. In the figure, reference numeral 1 denotes a main control unit, which is specifically constituted by a CPU. 3 is a ROM connected to the main controller 1 via the bus 2
And stores a screen saver and various control programs for realizing the display method of the present invention. 4 is R
It is an AM and stores temporary data generated when the screen saver stored in the ROM 3 is executed and when the control program is executed. An interface unit 5 receives image data from a video camera such as a surveillance camera not shown. 6 is an input processing unit,
The image data received by the interface unit 5 is decomposed for each pixel and written into the image memory 7. Reference numeral 8 denotes an output processing unit which enlarges / reduces image data stored in the image memory 7 and partially changes colors, and displays the changed image data on a screen by the display unit 9. Reference numeral 10 denotes a clock unit which has time information and a timer function. Reference numeral 11 denotes an operation unit, which includes various function keys and cursor keys for performing setting for changing image data displayed on the display unit 9.

FIG. 2 is a schematic diagram showing an image stored in the RAM 4 and processed by the screen saver of the present invention. A in the figure is an image before being processed by the screen saver, and the number of possible gradations is 256. The background portion is white (each gradation value of the RGB signal is 255), and the graphic portion is black (each gradation value of the RGB signal is 0). In a general change in the number of gradations, when the number of gradations is changed from i to j, the changed gradation value is (i / j) × n +
1 (n = 0, 1,..., J−1). Therefore, only the color difference between the gradation values is enlarged, there is no change in the gradation value of the white portion, and the maximum value of the luminance does not change. When changing the number of gradations from the number of gradations i to j by the screen saver of the present invention, ((ij) / 2) + n (n = 0, 1, 1)
.. J-1). That is, since the number of gradations is changed so as to concentrate on the vicinity of the central value of the gradation value by changing the large and small regions of the gradation value, the luminance can be reduced by changing the number of gradations. it can.

The image B is obtained by changing the number of gradations of the original image A to 128 and then lowering the luminance by 32. When changing the total number of gradations from 256 to 128, (R,
G, B) = (0, 0, 0) is represented by (R, G, B) =
(64, 64, 64) and (R, G, B) = (2
55, 255, 255) is (R, G, B) =
(191, 191, 191). Next, in order to lower the brightness by 32, the gradation value of the figure portion is (R, G,
B) = (32, 32, 32), and the gradation value of the background portion is (R, G, B) = (159, 159, 159).

In the image C, the number of tones is changed from 256 to 64 for the left half image, the luminance is reduced by 16 and the color is inverted for the right half image, and then the number of tones is 64.
And the brightness is reduced by 16. As a result, the tone value of the figure portion included in the left half area is (R,
G, B) = (80, 80, 80), the gradation value of the background portion is (R, G, B) = (143, 143, 143).
The gradation values of the figure part included in the right half area are (R, G,
B) = (143, 143, 143), and the tone value of the background portion is (R, G, B) = (80, 80, 80).

The screen saver installed in the ROM 3 of the image display device of the present invention is, for example, a normal display mode for displaying an image received by the interface unit 5 of the image display device without processing, between 8:00 and 20:00. When displaying the image processed by the screen saver,
In the daytime mode for displaying an image in which the number of gradations has been changed and the luminance has been changed, such as image B, and when displaying a processed image by a screen saver between 20:00 and 8:00, a selected area such as image C After the color reversal process is performed on the image, a night mode in which an image in which the number of gradations is changed and the luminance is changed is displayed.

FIG. 3 is a conceptual diagram showing the contents of the RAM 4 of the image display device. In the figure, a is a day / night mode definition table in which the switching time of the display mode is recorded. In the present embodiment, the switching time of the day mode to the night mode (20:00) and the switching time of the night mode to the day mode (8). ) Are recorded in advance. Further, numbers 1 to 3 are assigned to the mode flags in order to identify whether the display mode for displaying the image is the day mode, the night mode, or the normal mode.

Table b is an image processing definition table in which the number of gradations and the amount of change in luminance are recorded in advance for each of the daytime mode and the nighttime mode. For example, in the example shown in FIG. 3, the number of gradations is set to 128 and the change amount of luminance is set to 32 for the daytime mode, and the number of gradations is set to 64 and the luminance is set to 64 for the nighttime mode. The change amount is set to 16. After changing the image data stored in the image memory 7 to the number of gradations defined here, the output processing unit 8 lowers the luminance according to the change amount of the luminance. Further, identification information as to whether or not to change the number of gradations and identification information as to whether or not to lower the luminance for each mode are set in the change necessity flag. When making a change, assign 1 to the change necessity flag,
If no change is made, 2 is assigned to the change necessity flag.

The table c is a rectangle definition table in which the coordinates of the rectangular areas for which the color inversion of the image data is to be performed and a flag indicating whether or not the color inversion is required for each rectangular area are recorded. The user of this image display device defines the rectangular area,
This is performed by determining the vertex coordinates of the rectangle using the function keys and the cursor keys of the operation unit 11. The vertex coordinates of the defined rectangle are recorded in the rectangle definition table c. In addition, the user selects whether or not to invert the color of the image of the defined rectangular area for each display mode. In the case of inverting the color, assign 1 as an inversion necessity flag. 2 is assigned as a rejection flag.

Table d is a display result log which records the display results after the start of use of the screen saver. The time when the image received by the interface unit 5 starts to be displayed on the display unit 9, the time when the screen saver function starts to operate, and The switching time of the display mode and the maximum luminance at those times are sequentially recorded. The maximum luminance is determined from the number of gradations recorded in the image processing definition table b and the amount of change in luminance. (Maximum luminance) = (luminance center value) + (number of gradations) / 2− (change amount of luminance) Given by Further, the table e is a use situation table in which the accumulated light emission time is recorded, and the accumulated value of the display time and the maximum display luminance is recorded.

In this embodiment, the switching time between display modes, the number of gradations for each display mode, the amount of change in luminance, and the like are given in advance as factory settings. When using for the first time, these values are
You may input from 1.

FIG. 4 is a flowchart illustrating the processing procedure of the main control unit 1.

After the activation of the screen saver, the main control section 1 resets the timer of the clock section 10 (step S1).
The main control unit 1 determines whether there is a key operation such as a pressing operation of a function key or a cursor key of the operation unit 11 (step S2), and if there is a key operation (S2: YE)
S), the process returns to S1, and the timer is reset. If there is no key operation (S2: NO), the main control unit 1 determines whether a predetermined time has elapsed (step S3). If the predetermined time has not elapsed (S3: NO), the main control unit 1 executes the process. S2
Return to If the predetermined time has elapsed (S3: YES),
The image processed by the screen saver is displayed (step S4).

While the image processed by the screen saver is being displayed on the screen, the main controller 1 determines whether or not there is a key operation (step S5). If there is no key operation (S5: NO) , And returns to S4 to continue displaying the processed image by the screen saver. When there is a key operation (S5:
YES), the display of the processed image by the screen saver is stopped, and the image received by the interface unit 5 is displayed without processing (step S6). The main controller 1 determines whether or not the screen saver has been terminated (step S7), and if the screen saver has not been terminated (S7).
7: NO), returning to S1 to reset the timer of the clock unit 10.

FIG. 5 is a flowchart showing in detail the procedure for displaying a processed image by the screen saver.

The main control section 1 stores the full screen image data received by the interface section 5 in the image memory 7 (step S11).

The main control unit 1 reads out the number of gradations, the amount of change in luminance, and the change necessity flag for each of the daytime mode and nighttime mode from the image processing definition table b (step S1).
2) The daytime mode inversion necessity flag, the nighttime mode inversion necessity flag, and the coordinates of the rectangle are read from each rectangle area from the rectangle definition table c (step S13).

Based on the read coordinates, a rectangle is cut out from the full-screen image data and stored in the image memory 7 (step S14).

Next, the main controller 1 determines whether the current time corresponds to the daytime mode or the nighttime mode according to a procedure described later (step S15). S1
As a result of the determination in 5, it is determined whether or not the mode flag is 1 (step S16). If the current mode flag is not 1 (S16: NO), it is determined whether or not the mode flag is 2 (step S16). In step S17), if the mode flag is not 2 (S17: NO), the process returns to S15, and the display mode determination process is performed again.

When the display mode of the current time is determined by S16 and S17 (S16: YES or S17: YE
In S), it is determined whether or not to perform color inversion based on the inversion necessity flag read from the rectangle definition table c in S13 (step S18). If the reversal necessity flag is 1 (S18: YES), the color reversal process is performed (step S19), and the color-reversed rectangular image data is stored in the image memory 7 (step S20). If the inversion necessity flag is 2 (S18: NO), the image memory 7 stores the rectangular image data as it is without performing the color inversion process (S20).

Next, the main controller 1 determines whether or not reading has been completed for all rectangles (step S21).
If there is a rectangle that has not been read (S21: NO),
The process returns to S13, and the inverting necessity flag and the coordinates of the rectangle are read for the remaining rectangles.

After all the rectangle information stored in the rectangle definition table c has been read (S21: YES), S20 is executed.
Is pasted on the original full-screen image data (step S22). The main controller 1 determines whether all the rectangular image data has been pasted (step S23), and if there is any rectangular image data that has not been pasted (S23: N).
O), the process returns to S22 to continue the paste processing of the rectangular image data.

When all the rectangular image data are pasted (S23: YES), the mode determined in S16 and S17, the gradation number and the luminance change amount of each display mode read in S12, and the respective The number of gradations and the brightness of the full screen image are changed based on the change necessity flag (step S24) and displayed on the screen (step S2).
5).

FIG. 6 is a flowchart showing the details of the display mode determination process in FIG.

The main controller 1 reads the switching time between the modes and the mode flag from the day / night mode definition table a (step S31). After obtaining the current time from the clock unit 10 (step S32), the main control unit 1 determines whether the current time belongs to the daytime mode or the nighttime mode (step S33). As a result of the determination, it is determined whether or not the display mode to which the current time belongs is the same as the display mode indicated by the mode flag read from the day / night mode definition table a (step S34).
34: NO), and change the mode flag (step S3).
5) If they are the same (S34: YES), the display mode determination processing ends.

In the present embodiment, color inversion is taken as an example of color conversion processing. However, color conversion may be performed not only by color inversion but also by saturation conversion or hue conversion.

Further, in this embodiment, the region to be inverted is defined by a rectangle. However, the region is not limited to a rectangle, but may be defined by an arbitrary geometric shape such as a polygon, a circle, and an ellipse.

Further, in the present embodiment, an example of an image display device having a screen saver installed is described. However, the screen saver is provided by being recorded on a recording medium such as a floppy (registered trademark) disk or a CD-ROM. It is also possible to install and use it on the personal computer itself. In this case, the definition of the rectangle, the input of the number of gradations, the input of the amount of change in luminance, and the like can be performed from an input device such as a keyboard or a mouse connected to the personal computer.

Embodiment 2 In Embodiment 2, the display results in each display mode are recorded in the display result log d of the RAM 4, and the recommended values of the number of gradations and the change in luminance calculated based on the display result log d are recorded. This embodiment is different from the first embodiment in that the display is performed and a change in the change amount of the gradation value and the luminance is received.

FIG. 7 is a flowchart showing a procedure for writing the display result log d.

The main controller 1 determines whether or not the screen saver has been activated (step S41), and if the screen saver has been activated (S41: YES), obtains the maximum luminance of the image display device from the image processing definition table b. Then, the time when the screen saver is activated and the maximum luminance are recorded in the display result log d (step S42). If the screen saver has not been activated (S41: NO), the process waits until the screen saver is activated.

Next, the main controller 1 determines whether or not the screen saver has been completed (step S43). If the screen saver has not been completed (S43: NO), the main controller 1 determines whether or not the display mode has been changed. Judgment (Step S4
4) When there is a change in the display mode (S44: YE)
S), the maximum luminance in the changed display mode is obtained from the image processing definition table b, and the display mode change time and the maximum luminance are recorded in the display result log d (step S4).
5).

If it is determined that the screen saver has been completed (S43: YES), the time at which the screen saver was completed is recorded in the display result log d (step S46).

FIG. 8 is a flowchart showing a procedure for calculating a recommended value of luminance based on the display result log of the screen saver. FIG. 9 is an explanatory diagram showing the recorded contents of the display result log d, and FIG. 10 is a screen saver. It is an explanatory view showing a setting change screen.

The main control unit 1 obtains an amount obtained by integrating the display time and the maximum luminance based on the display result log d as shown in FIG. 9 (step S52), and stores it in the use status table e (step S53). ). Next, the main control unit 1 sets a target and a target based on the change amount of the gradation number and the luminance recorded in the image processing definition table b and the switching time between the display modes recorded in the day / night mode definition table a. Then, a luminance half-life to be calculated is calculated (step S54). The target luminance half-life is calculated by the following equation.

Target luminance half-life = standard luminance half-life × (display element maximum luminance × 24 hours) / Σ (maximum luminance of each mode × display time of each mode)

Here, the standard luminance half-life is a value peculiar to the display device, and is defined as a time until the luminance of the display element is reduced to half when the image is displayed at the maximum luminance. In the present invention, since the maximum brightness is suppressed by providing a daytime mode and a nighttime mode with respect to the normal display, the target brightness half-life can be made longer than the standard brightness half-life.

Next, the life expectancy based on the display result is calculated from the display result log d (step S55). Since the use frequency and the use time of the image display device differ depending on the user, the value of the life expectancy calculated from the image processing definition table b generally differs from the value of the life expectancy calculated from the display result log d.

Therefore, the main control unit 1 calculates the maximum luminance recommendation value in the daytime mode and the nighttime mode such that the life expectancy calculated from the image processing definition table b and the life expectancy calculated from the display result log d become equal (step). S56). Although the combination of the maximum luminance recommended values cannot be uniquely obtained, a combination that minimizes the difference between the maximum luminance recommended values of both modes is selected. By selecting in this way, it is possible to prevent one of the maximum luminance recommended values from increasing and the other from increasing.

Next, the main controller 1 displays a screen saver setting screen as shown in FIG. 10, and inputs either the number of gradations or the amount of change in luminance for each mode (step S57). Is determined (step S58). When the input value has not been determined (S58:
NO), and wait until the input value is determined. When the input value is determined (S58: YES), the change amount of the number of gradations or luminance not input in S57 is calculated (step S5).
9) Display on the screen saver setting screen and rewrite the value of the image processing definition table b. Further, the main control unit 1
The predicted luminance after the change is calculated and displayed on the screen saver setting screen (step S60). Thereafter, the changed gradation number and luminance are written in the image processing definition table b (step S61).

(Supplementary Note 1) The display time of an image is measured, and when a predetermined time has elapsed, an image to be displayed is divided into a plurality of areas by an image display method for displaying an image having a lower luminance than the image. An image display characterized by receiving a selection as to whether or not to perform color conversion for each divided area, performing color conversion processing on an image of the area selected for color conversion, and displaying the color-converted image. Method. (Supplementary Note 2) Means for measuring the display time of the image, means for determining whether or not a predetermined time has elapsed, means for generating an image having a lower brightness than the image when the predetermined time has elapsed, Means for dividing an image to be displayed into a plurality of regions, means for receiving a selection as to whether or not to perform color conversion for each of the divided regions, and color conversion. Means for performing a color conversion process on an image of an area selected to be performed. (Supplementary note 3) The image display device according to supplementary note 2, further comprising means for lowering the luminance by a predetermined amount. (Supplementary Note 4) The image display device according to Supplementary Note 2, further comprising means for changing a gradation value to lower a maximum luminance value by a predetermined amount. (Supplementary Note 5) Selection as to whether or not to perform the color conversion processing, whether to perform processing to lower the luminance by a predetermined amount, or whether to perform processing to lower the luminance change value by a predetermined amount by changing the gradation value The image display device according to any one of supplementary notes 2 to 4, further comprising: means for accepting the selection for each time period during which an image is displayed; and means for performing each processing according to the selection. (Supplementary Note 6) Means for measuring the display time of the image, means for determining whether or not a predetermined time has elapsed, and when the predetermined time has elapsed, a value lower than the image is set to prevent consumption of the display element. Means for generating an image of luminance, and an image display device including means for displaying the generated image, a means for calculating the life expectancy of the display element based on the luminance maximum value of the image for each time zone to display the image, Means for calculating the life expectancy of the display element based on the maximum luminance value of the displayed image and the time during which the image was displayed at the maximum luminance value, and a method of calculating the maximum luminance value such that the calculated two remaining lives are as equal as possible. An image display device comprising: means for calculating a recommended value; and means for reducing the brightness of an image based on the calculated recommended value of the maximum luminance value. (Supplementary Note 7) A step of causing a computer to determine whether a predetermined time has elapsed, a step of causing the computer to generate an image having a lower luminance than the image when the predetermined time has elapsed, Causing the computer to divide the image to be displayed into a plurality of regions, and causing the computer to receive a selection as to whether or not to perform color conversion for each of the divided regions. And a step of causing a computer to perform a color conversion process on an image of an area selected for color conversion. (Supplementary Note 8) A step of causing the computer to determine whether a predetermined time has elapsed, a step of causing the computer to generate an image having a lower luminance than the image when the predetermined time has elapsed, Causing a computer to divide an image to be displayed into a plurality of areas on a computer-readable recording medium, wherein the computer program has a computer program recorded thereon, the method comprising: A computer program having a step of accepting a selection as to whether or not to perform color conversion for each of the divided areas, and a step of causing a computer to perform a color conversion process on an image of the area selected for color conversion. A recording medium readable by a computer, characterized by being recorded.

[0063]

As described in detail above, according to the first, second, third, and fourth inventions, the image to be displayed is divided into a plurality of regions, and each divided region is divided into a plurality of regions. In order to perform the color conversion process on the image of the area selected to perform the color conversion, even when displaying the processed image by the screen saver,
The display contents of the non-selected area can be confirmed.

In the first, second, third, and fourth aspects of the present invention, in addition to the color conversion processing, processing for lowering the luminance by a predetermined amount is further performed. In other words, the service life of the image display device can be prolonged.

Further, according to the first, second, third, and fourth aspects of the present invention, a process of changing the gradation value and lowering the maximum luminance value by a predetermined amount is performed. The brightness of the image can be reduced within a range that does not impair the image, and the consumption of the display element can be prevented.

Further, according to the first, second, third and fourth aspects of the present invention, it is possible to select whether or not to perform the color conversion processing for each time period during which an image is displayed, and to lower the luminance by a predetermined amount. In order to accept the selection of whether or not to perform the processing and whether or not to perform the processing of changing the gradation value and lowering the maximum luminance value, for example, the above-described processing is performed in accordance with the use time of the user of the image display apparatus. When the selection is made, the frequency of changing the settings of the screen saver can be reduced, and the user's labor can be reduced.

Further, the life expectancy of the display element calculated based on the maximum value of the luminance for each time zone, the life expectancy of the display element calculated based on the maximum luminance of the displayed image and the time displayed at the maximum luminance, and Since the recommended value of the maximum luminance value is calculated as equal as possible, and the luminance of the image is reduced based on the recommended value, the consumption of the display element after starting the image display is maximized. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram of an image display device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an image processed by a screen saver.

FIG. 3 is a conceptual diagram showing the contents of a RAM of the image display device.

FIG. 4 is a flowchart illustrating a processing procedure of a main control unit.

FIG. 5 is a flowchart showing details of a display procedure of a screen saver screen.

FIG. 6 is a flowchart illustrating a procedure of a display mode determination process.

FIG. 7 is a flowchart showing a procedure for writing a display result log.

FIG. 8 is a flowchart illustrating a procedure for calculating a recommended luminance value based on a display result log.

FIG. 9 is an explanatory diagram showing recorded contents of a display result log.

FIG. 10 is an explanatory view showing a screen for changing a screen saver setting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main control part 2 Bus 3 ROM 4 RAM 5 Interface part 6 Input processing part 7 Image memory 8 Output processing part 9 Display part 10 Timekeeping part 11 Operation part

Claims (4)

[Claims] 1. An image display method for measuring an image display time and, when a predetermined time has elapsed, displaying an image having a lower luminance than the image, the image to be displayed is divided into a plurality of regions, and the divided image is divided into a plurality of regions. An image display method comprising: receiving a selection as to whether or not to perform color conversion for each area, performing a color conversion process on an image of the area selected for color conversion, and displaying the color-converted image. 2. A means for measuring a display time of an image, a means for determining whether or not a predetermined time has elapsed, and a means for generating an image having a lower luminance than the image when the predetermined time has elapsed. An image display device comprising means for displaying a generated image, a means for dividing an image to be displayed into a plurality of areas, a means for receiving a selection as to whether or not to perform color conversion for each of the divided areas; Means for performing a color conversion process on an image in an area selected to be converted. A step of causing the computer to determine whether a predetermined time has elapsed; a step of causing the computer to generate an image having a lower luminance than the image when the predetermined time has elapsed; Displaying the generated image. The computer program, comprising: causing a computer to divide an image to be displayed into a plurality of regions; and causing the computer to select whether or not to perform color conversion for each of the divided regions. A computer program, comprising: causing a computer to perform a color conversion process on an image of an area selected for color conversion. 4. A step of causing a computer to determine whether or not a predetermined time has elapsed; a step of causing the computer to generate an image having a lower luminance than the image when the predetermined time has elapsed; Displaying the generated image on a computer-readable recording medium having a computer program recorded thereon, the method comprising: causing the computer to divide an image to be displayed into a plurality of areas; A computer program is recorded which has a step of receiving a selection as to whether or not to perform color conversion for each area, and a step of causing a computer to perform color conversion processing on an image of the area selected for color conversion. A computer-readable recording medium characterized by the above-mentioned.