JP2007212593A - Display system, display method, and display program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that when advertisement etc., is displayed, the advertisement can not sufficiently be represented and sufficient advertisement can not be obtained since a conventional display system drives light emission bodies of the whole screen uniformly at a low duty ratio to uniformly lower the brightness of the whole screen and then the whole dislay screen enters an out-of-focus state to cause a decrease in recognition performance. <P>SOLUTION: In the display system equipped with a display section having a plurality of light emitting elements and a control section controlling the plurality of light emitting elements, the control section lowers the luminance of some of the plurality of light emitting elements or turns them off to suppress a decrease in expressing power of display while displaying information at the display section. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display system, a display method, and a display program capable of displaying an image or the like without reducing or improving expressive power while reducing power consumption.

  Various display systems for displaying information such as advertisements of products and companies, news, etc. are installed in places throughout the city. Particularly in large cities, a large number of display systems are installed, and information is displayed for a long time regardless of day or night.

  Displaying while consuming a large amount of power in this way goes against the trend of the era of promoting environmental protection. However, the influence of advertisements is considered to be great, and the needs for displaying advertisements from clients are not negligible.

  Under the circumstances as described above, a display system capable of performing display while suppressing power consumption is desired for the purpose of reducing the cost of the display system. As a conventional technique, the following technique related to a display system aiming at power saving is disclosed.

  FIG. 11 is a block diagram showing a circuit configuration of a display system (solar cell sign system) disclosed in Japanese Patent Laid-Open No. 2001-92391. Referring to FIG. 11, the control element that controls on / off of the light emitting diode controls the light emitting diode to be turned on by reducing the duty ratio of the control element according to the charge amount of the storage battery detected by the charge capacity detector. Yes.

In addition, the display system (display device brightness control method and device) described in Japanese Patent Application Laid-Open No. 2004-77910 has a duty ratio of a pulse signal for PWM driving a light emitter during business hours and outside business hours of a store to be installed. In the non-business hours, the driver is driven at a low duty ratio to reduce the luminance of the light emitter and display.
JP 2001-92391 A JP 2004-77910 A

  However, the conventional display systems described in the above documents have the following problems.

  Any of the conventional display systems described above realizes a power-saving display system by lowering the brightness of the entire screen by driving the light emitters of the entire screen uniformly at a low duty ratio. However, in such a display in which the brightness of the entire screen is lowered uniformly, the entire display screen becomes blurred and the recognizability is lowered. Therefore, there has been a problem that in displaying advertisements, sufficient expressions cannot be made and effective advertisements cannot be made.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a display system capable of displaying while saving power or maintaining the same level of expression while losing display power. To do.

To solve the above problem,
The display system of the present invention includes:
In a display system comprising a display unit having a plurality of light emitting elements and a control unit for controlling the plurality of light emitting elements,
The control unit is characterized in that a part of the plurality of light emitting elements is reduced in luminance or turned off to suppress a reduction in display power while displaying information on the display unit.

Moreover, the display system of the present invention includes:
In a display system comprising a display unit having a plurality of light emitting elements and a control unit for controlling the plurality of light emitting elements,
The display system includes a power saving mode in which brightness of some of the light emitting elements is reduced or turned off, and when the power saving mode is executed, the light emitting element that is reduced in brightness or turned off is specified. The control unit displays information on the display unit by lowering the luminance of the identified light emitting element or turning it off.

  By adopting this configuration, the brightness of some of the light-emitting elements that make up the display unit is reduced or turned off, and while displaying with low power consumption, display without losing expressiveness or maintaining the same level of expressiveness Is possible.

Moreover, the display system of the present invention includes:
An image processing apparatus, a display device having a display unit and a control unit,
When the power saving mode is executed, the image processing apparatus identifies a light emitting element that reduces brightness or turns off,
The control unit displays information on the display unit by lowering the brightness of the identified light emitting element or turning it off.

Moreover, the display system of the present invention includes:
Have an image processing program,
When the image processing program is executed, a light emitting element whose luminance is reduced or turned off is identified, and the control unit displays information on the display unit by reducing the luminance of the identified light emitting element or turning it off. .

Moreover, the display system of the present invention includes:
Each light emitting element has position data,
The light emitting element whose luminance is reduced or turned off is specified by designating its position data.

Moreover, the display system of the present invention includes:
There are at least one display pattern to be displayed in the power saving mode,
When the power saving mode is executed, the display mode is selected,
The light-emitting element whose luminance is reduced or turned off is specified according to the selected display mode.

Moreover, the display method of the present invention includes:
A display method for displaying information on a display unit having a plurality of light emitting elements by reducing brightness or turning off some of the light emitting elements among the plurality of light emitting elements.
Identifying which of the plurality of light emitting elements of the display unit the information to be displayed is assigned;
A step of identifying a light-emitting element whose luminance is reduced or extinguished;
Changing the luminance of the identified light emitting element;
And a step of displaying information with the changed luminance on the display unit in the previous period.

The display program of the present invention is
A display program for displaying information on a display unit having a plurality of light emitting elements by reducing brightness or turning off some of the light emitting elements among the plurality of light emitting elements.
Identifying which of the plurality of light emitting elements of the display unit the information to be displayed is assigned;
A step of identifying a light-emitting element whose luminance is reduced or extinguished;
Changing the luminance of the identified light emitting element;
And causing the computer to execute the step of displaying information with the changed brightness on the display unit in the previous period.

  According to the display system of the present invention, the luminance of a part of the light-emitting elements constituting the display unit is reduced or turned off, and the display power can be saved without losing the expressive power or maintaining the same expressive power. Can be displayed.

Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)
FIG. 1 is a block diagram showing an outline of the system configuration of a display system according to Embodiment 1 of the present invention. FIG. 2 is a diagram illustrating an image display flow in the display system according to the first embodiment of the present invention.

  With reference to FIG. 1, the structure of the display system of Embodiment 1 is demonstrated.

  As shown in FIG. 1, the display system 100 of the present embodiment includes an image processing device 101 and a display device 110. The image processing apparatus 101 and the display apparatus 110 can be connected by wire such as an optical cable, or can communicate with each other wirelessly, and display data such as images or characters subjected to image processing from the image processing apparatus 101 to the display apparatus 110. It is possible to send. The installation location of the image processing apparatus 101 and the display device 110 is not particularly limited. However, when the display device 110 is installed outdoors or indoors in a place with many passers-by, it can display advertisements and the like more effectively. preferable.

  The display device 110 mainly includes a display unit 109, a control unit 103, a data reception unit 102, and a memory 104. The display unit 109 includes a plurality of light emitting elements such as light emitting diodes (LEDs), and can display an image or the like. Furthermore, a fine image can be displayed by holding a sufficient number of light emitting elements. Hereinafter, an LED will be described as an example of a light-emitting element that constitutes the display unit 109. However, the display unit is not limited to an LED, and may be a display unit that includes light-emitting elements in a matrix. Further, the arrangement of the light emitting elements is not particularly limited. Furthermore, the light-emitting elements described in this specification are based on the assumption that they are a group of light-emitting elements composed of RGB LEDs, but may be single-color LEDs.

  The control unit 103 refers to the display data received by the data receiving unit 102 and stored in the memory 104 and controls the display unit driver 108 to display the display data. The memory 104 includes a control program memory 106 having a control program for controlling the display driver 108, a display data memory 105 for storing received display data, and a writable RAM 107. The display driver 108 controls the RGB brightness of each light emitting element. The brightness control is realized by a general method such as a method for controlling the amount of current flowing through the LED or a method for controlling the duty ratio of the voltage applied to the LED.

  The display device 110 is connected to the power source 111 and driven by receiving power. The power source 111 may be supplied with power from an external power source, or the display device 110 may have a power source using natural energy such as a solar battery and may be supplied with power from there. Alternatively, a combination thereof may be used. When a power source using natural energy such as a solar cell is adopted as the power source, it is preferable because energy saving can be realized more effectively.

  The image processing apparatus 101 is a computer and includes general configurations such as an input unit such as a display and a keyboard, a control unit, and a storage unit.

  With reference to FIG. 2, the image display flow of the display system of this embodiment will be described.

  As shown in FIG. 2, the display system of this embodiment performs display according to a series of flows.

  In the image display flow of the present embodiment, the image processing apparatus 101 performs image processing for performing power saving display in advance and then transmits display data to the display apparatus 110 to display information.

  The flow is started by designating image data to be displayed and selecting a power saving display mode (S11). The image processing apparatus 101 has a program for performing image processing. When the program is started, a window for selecting image data to be image processed and a button for selecting a power saving display mode are presented on the display.

  When the image data and the power saving display mode are selected, the image processing apparatus 101 reads the selected image data, determines which light emitting element of the display unit 109 of the display apparatus the read image data is assigned to, and Coordinate data is assigned (S12). The coordinate data here corresponds to the position of each light emitting element. For example, when the bottom side of the display unit 109 is the X axis and the left side is the Y axis, the coordinate data is a position coordinate specified by the XY coordinate system. Here, the bottom side is a lower side in the vertical direction when the screen of the display unit 109 is viewed from the front side, and the left side is a left side when the screen of the display unit 109 is viewed from the front side.

  Next, a portion to be emphasized for display (a portion that is a main portion of the image and is displayed without being reduced in luminance or turned off, hereinafter referred to as an emphasized portion) is extracted from the read image data (S13). Next, the coordinate data of the LED whose luminance is reduced or extinguished is specified for the emphasized portion (S14). There are several types of power-saving display modes (described later). Depending on which power-saving display mode is used, the method for extracting the highlighted portion in S13 and S14 and the method for specifying the coordinates of the LED to be turned off differ. Will be described together with the description of each power saving display mode described later.

  In addition, the power saving display mode may be selected by presenting a selection screen on the display to allow the user to select, or by automatically selecting an appropriate power saving display after reading an image. An aspect may be selected.

  Next, the brightness of the LED specified in S14 is changed (S15). It is assumed that the luminance of the LED is numerically set. For example, the luminance can be expressed numerically by setting the maximum luminance to 100 and the minimum luminance to 0 (corresponding to extinction).

  As described above, when display data (coordinate data, brightness) on which image processing for power saving display has been executed by the image processing apparatus 101 is determined, the display data is transmitted to the display apparatus 110 (S16).

  The display device 110 receives the display data transmitted from the image processing device 101 by the data receiving unit 102 (S17), and temporarily stores it in the display data memory 105 (S18). Next, the display program is executed, the display driver 108 is driven, and the display data in the display data memory 105 is referred to and displayed (S19). The image data to be displayed may be still image data or moving image data, and moving images can be displayed.

  3 to 8 show various modes of power saving display.

  With reference to FIGS. 3 to 8, each power saving display mode and the above-described image processing (S <b> 13, S <b> 14, S <b> 15) will be described.

  Although the figure is drawn in gray scale, it is originally a color display. In addition, the original image has higher luminance as white is stronger in the figure.

  3 and 4 show a power-saving display mode that gives a stereoscopic visual effect to an image.

  Referring to FIG. 3, in order to give a three-dimensional visual effect to the image, the brightness of the portion (B) that is desired to be displayed far away is set lower than the portion (A) that is desired to be displayed closer. To do. In this way, by making the luminance different depending on the region, it is possible to give a sense of perspective even on a flat screen while saving power by reducing the luminance.

  The conventional advertisement by three-dimensional modeling has a high effect as an advertisement, but has a problem that the production cost is high. However, according to this power saving display mode, it is possible to present an image having perspective in a flat screen, and it is possible to obtain the same effect as a three-dimensional advertisement at a low cost.

  In the case of this display mode, the part (A) to be displayed so that it can be seen close to the display part corresponds to the emphasized part of the flow. The highlighted portion may be extracted by the user on the display of the image processing apparatus, or may be extracted by automatically determining the shape of the figure from the read image data (S13). Here, the case of automatically extracting will be described. The portion corresponding to the emphasized portion in the image data can be easily extracted by providing extraction data so that it can be automatically extracted when the user creates a display image.

  Next, the part (B) to be displayed so as to appear far away is specified with respect to the emphasized part extracted in S13 (S14). The specifying method is the same as the method for extracting the emphasized portion, and may be designated by the user or automatically. And it changes so that the numerical value of the LED brightness | luminance of the area | region specified by S14 may be made small (S15).

  FIG. 4 is an example of display using this display mode. Referring to FIG. 4, the highlighted portion indicated by the arrow is set to have a higher brightness than the other portions, and is displayed so that it can be seen nearby. In this way, while displaying with low power consumption, it is possible to provide a three-dimensional display effect and display without losing expressive power or maintaining the same expressive power.

  FIG. 5 shows a power-saving display mode in which the LED brightness around the specific area in the image is reduced in gradation.

  Referring to FIG. 5, the brightness of the LEDs in the peripheral part (D) of the specific area (C) is set so as to decrease in gradation. By this display mode, the specific area (C) of the display content in the image is displayed more clearly.

  In addition, the gradation of the LED brightness in the peripheral portion (D) has an effect of not being aware of the cut off of the screen. Furthermore, this display method is particularly effective at night. It is possible to give a visual effect that is familiar with the surrounding night view and that the display contents appear to float in the sky.

The figure and characters (portion enclosed by a square) in FIG. 5 correspond to the emphasized portion of the flow. The highlighted portion may be extracted by the user, or a portion having a figure or character may be automatically extracted from the read image (S13). Alternatively, only specific figures and characters may be extracted. Next, for the portion extracted in S13, an area where the luminance of the LED is reduced in gradation is specified (S14). And about the LED which reduces a brightness | luminance in the gradation specified by S14, the numerical value of a brightness | luminance is changed so that it may fall in a gradation. (S15)
In FIG. 5, the portion to be displayed with the luminance reduced in gradation is only the upper portion in the drawing, but may be the entire periphery of the emphasis portion regardless of this. Further, the outermost peripheral portion may be turned off.

  6 and 7 show a power-saving display mode in which a part of LEDs in the same color or similar color region in an image is turned off (thinned out) for display.

  FIG. 6 shows a display in which a part of the LEDs are turned off linearly in the same color or similar color region. The directionality of the line is not limited to the vertical direction as shown in FIG. FIG. 7 shows a display in which the LEDs are turned off in a certain pattern within the same color or similar color region. The pattern of the position of the LED to be turned off is not limited to the pattern of FIG.

  As shown in FIGS. 6 and 7, even if a part of the LEDs of the same color or similar color region in the image is turned off, the information transmission power of the display is not reduced unless the brightness of the emphasized portion (ABC characters) is reduced. Will not be damaged. Further, by changing the LED to be turned off on a sufficiently short time scale, it is possible to make it difficult to understand that the LED is turned off due to the afterimage effect. Therefore, it is possible to maintain the same display quality as a normal display.

  The extraction of the emphasized portion in S13 may be selectable by the user or may be automatically extracted. On the other hand, the LED to be thinned out is specified based on the same color or similar color region specified with reference to the RGB values of the image data. The thinning pattern may be specified by the user, or may be automatically performed according to the shape and tone of the same color or similar color region. As described above, when the LED to be thinned out is specified (S14), the luminance value of the specified LED is set small (S15).

  FIG. 8 shows a mode in which a fantastic effect such as a shadow effect is given and displayed by turning off a specific color area in the image.

  Referring to FIG. 8, the area displayed in a specific color in the image is turned off.

  The extraction of the emphasized portion in S13 may be made selectable by the user or may be automatically extracted. On the other hand, the extraction of the LED to be turned off is specified by referring to the RGB value of each light emitting element and extracting a portion of a specific color (S14). And the brightness | luminance of identified LED is changed small (S15).

  As shown in FIG. 8, it is possible to display with a fantastic effect such as a shadow picture while displaying with power saving.

As described above, in the display system 100 according to the present embodiment, the luminance of a part of the light emitting elements is reduced or turned off, and the display power is displayed with low power consumption while maintaining the same level of expression power. It is possible to keep and display.
(Embodiment 2)
In the first embodiment, display data image-processed in advance by an image processing apparatus is transmitted to the display apparatus and displayed. The display system according to the second embodiment described below includes a program that performs image processing in the display device, and displays the image data received by the display device after image processing.

  FIG. 9 is a block diagram showing an outline of the system configuration of the display system according to the second embodiment of the present invention. FIG. 10 is a diagram showing an image display flow in the display system according to the second embodiment of the present invention. A second embodiment of the display system of the present invention will be described with reference to FIG. 9 and FIG. A description of features common to the first embodiment will be omitted, and characteristic portions of the second embodiment will be described.

  With reference to FIG. 9, the structure of the display system 200 of Embodiment 2 is demonstrated.

  Since the present embodiment performs image processing on the display device 124 side, the image processing device as in the first embodiment is not necessary, and an image input device 121 for inputting image data is provided instead. Alternatively, the image data may be directly input to the display device 124. Further, the memory 122 of the display device 124 includes an image processing program for performing image processing and an image processing program memory 123 for storing the program.

  With reference to FIG. 10, the image display flow of the display system 200 of Embodiment 2 is demonstrated.

  The flow starts by designating image data to be displayed in a power saving manner with the image input device 121 and selecting a power saving display mode (S21). The designated image data is transmitted to the display device 124 (S22) and temporarily stored in the image data memory 125 (S23). Next, an image processing program is executed, and display data in which the brightness of each LED is changed is determined (S25 to S28, specifying the LED whose brightness is reduced or turned off depending on the display mode is the same as in the first embodiment). The determined display data is temporarily stored in the RAM 107. Then, the display program is executed, the display driver 108 is driven, and the display data in the RAM 107 is referred to and displayed (S29).

  As described above, in the display system 200 according to the present embodiment, as in the first embodiment, the luminance of a part of the light-emitting elements is reduced or turned off, and the display is performed with power saving, but the expression power is not lost or the same level. It is possible to display while maintaining the expressive power of.

  In addition, it should be considered that the above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a system configuration figure of a display system of a 1st embodiment of the present invention. It is an image display flow of the display system of 1st Embodiment of this invention. It is 1 aspect of the power saving display displayed on the display system of 1st Embodiment of this invention. It is 1 aspect of the power saving display displayed on the display system of 1st Embodiment of this invention. It is 1 aspect of the power saving display displayed on the display system of 1st Embodiment of this invention. It is 1 aspect of the power saving display displayed on the display system of 1st Embodiment of this invention. It is 1 aspect of the power saving display displayed on the display system of 1st Embodiment of this invention. It is 1 aspect of the power saving display displayed on the display system of 1st Embodiment of this invention. It is a system configuration figure of a display system of a 2nd embodiment of the present invention. It is an image display flow of the display system of 2nd Embodiment of this invention. It is a block diagram which shows the circuit structure of the conventional display system of Unexamined-Japanese-Patent No. 2001-92391.

Explanation of symbols

100, 200 Display system 101 Image processing device 110, 124 Display device 103 Control unit 109 Display unit

Claims (8)

A display unit having a plurality of light emitting elements;
In a display system comprising a control unit for controlling the plurality of light emitting elements,
The control unit suppresses a decrease in display power while displaying information on the display unit by reducing brightness or turning off a part of the plurality of light emitting elements. A display unit having a plurality of light emitting elements;
In a display system comprising a control unit for controlling the plurality of light emitting elements,
The display system includes a power saving mode for reducing brightness or turning off some of the light emitting elements among the plurality of light emitting elements.
When the power saving mode is executed, the light emitting element that reduces or turns off the luminance is identified,
The control unit displays information on the display unit by lowering the luminance of the identified light emitting element or turning it off. The display system includes an image processing device, a display device having the display unit and the control unit,
When the power saving mode is executed, the image processing device identifies a light emitting element that reduces brightness or turns off,
The display system according to claim 2, wherein the control unit displays information on the display unit by reducing brightness or turning off the identified light emitting element. The display system has an image processing program,
When the image processing program is executed, a light emitting element that lowers brightness or turns off is identified,
The display system according to claim 2, wherein the control unit displays information on the display unit by reducing brightness or turning off the identified light emitting element. Each of the light emitting elements has position data,
The display system according to any one of claims 1 to 4, wherein the light emitting element whose luminance is reduced or turned off is specified by designating position data thereof. There are at least one display mode displayed in the power saving mode,
When the power saving mode is executed, a display mode is selected,
The display system according to any one of claims 2 to 5, wherein the light emitting element that lowers or turns off the brightness is specified according to the selected display mode. A display method for displaying information on a display unit having a plurality of light emitting elements by reducing brightness or turning off some of the light emitting elements among the plurality of light emitting elements.
Identifying which of the plurality of light emitting elements of the display unit the information to be displayed is assigned;
A step of identifying a light-emitting element whose luminance is reduced or extinguished;
Changing the luminance of the identified light emitting element;
And a step of displaying information with the changed luminance on the display unit of the previous period. A display program for displaying information on a display unit having a plurality of light emitting elements by reducing brightness or turning off some of the light emitting elements among the plurality of light emitting elements.
Identifying which of the plurality of light emitting elements of the display unit the information to be displayed is assigned;
A step of identifying a light-emitting element whose luminance is reduced or extinguished;
Changing the luminance of the identified light emitting element;
A display program for causing a computer to execute the step of displaying information with the changed brightness on the display unit in the previous period.