JP5045136B2 - Large screen display device - Google Patents

Description

  The present invention relates to a large-screen display device used for displaying video information and providing information to an unspecified number of publics.

  Large-screen display devices have been widely used as a means for advertising and sales promotion activities for companies and products, or for providing information to the public in public facilities. For example, large-screen display devices are installed in streets, station corridors, and event venues where a large number of people come and go, and various video information using moving images, still images, text, etc. is linked to advertisements and campaigns to the public. Has come to be offered. This is because by displaying information to be transmitted to the public on a large screen, information can be transmitted to a larger number of people at the same time, and the advertising effect can be further enhanced.

  In such a large screen display device, a large number of viewers stop in front of the display screen or watch the video information while moving, so that the relative position between each viewer and the display screen becomes indefinite. For this reason, the video information displayed on the display screen has a difference in appearance between a viewer near the display screen and a viewer located away from the display screen. For example, when detailed video information is displayed according to the position of the viewer near the display screen, it is difficult for the viewer who is away from the display screen to see. On the other hand, if the video information is enlarged and displayed so that viewers away from the display screen can easily see, the video area that can be viewed at a glance for viewers near the display screen is narrowed. , The amount of information transmitted is reduced. In view of this, in large-screen display devices, it has become a problem to provide video information that is easily visible to all viewers.

  As conventional techniques related to the above problems, there are a video information providing system and a coding control information generation method disclosed in Patent Document 1 below. In this prior art, in order to obtain video information having a resolution that can be easily seen by a viewer, encoding control information of video information is generated using a display screen size and a viewing distance as parameters.

JP-A-9-55926 (page 5, FIG. 1)

  The prior art of Patent Document 1 is designed to obtain an optimal resolution in accordance with the visual characteristics of the viewer when the display screen size of the display device and the viewing distance between the display device and the viewer fluctuate. The present invention provides an economical video information providing system by maintaining necessary and sufficient image quality and suppressing unnecessary code transmission.

  However, since the conventional technology of Patent Document 1 is based on the premise that video information is provided only by a single display screen, a plurality of different video information cannot be provided simultaneously by a plurality of display screens. For this reason, in the case of a large screen display device intended to provide video information to an unspecified number of publics, in addition to a display screen for the entire unspecified number of publics, viewing at a certain position in the large screen display It is necessary to display a display screen for a viewer or a display screen for a viewer at another position simultaneously and independently. However, in the prior art of Patent Document 1, such a screen for each viewer is required. There was a problem that a private display screen could not be displayed simultaneously and independently.

  Furthermore, in the prior art of Patent Document 1, when there are a plurality of viewers, only the minimum viewing distance among the viewing distances of each viewer is used for determining the resolution, which is an indicator of the fineness of display. Therefore, the determined resolution is fixed to a resolution that matches the viewer at the minimum viewing distance. For this reason, there has been a problem that video information whose resolution is individually controlled cannot be provided to each of a plurality of viewers. Furthermore, because there are individual differences in the visual acuity of viewers in the unspecified number of publics, it is desirable to automatically adapt the resolution of the displayed video information not only according to the visual distance but also according to the visual acuity of each viewer. There was a problem.

  The present invention has been made to solve the above-described problems. A private display screen for each viewer is displayed simultaneously and independently, and the resolution is individually adapted to each of a plurality of viewers. An object of the present invention is to provide a large screen display device.

  In order to solve the problems described above, a large-screen display device according to the present invention includes a display unit that displays information provided to a viewer, and a public display area that displays information for an unspecified viewer on the display unit. Public display area generating means for generating information, private display area generating means for generating a private display area for displaying information for a specific viewer on the display means, and the public display area generated by the public display area generating means And control means for controlling the generation conditions of the private display area generated by the private display area generation means.

  According to the present invention, a private display screen for each viewer is displayed simultaneously and independently, and the large screen display device can be placed at any position by individually adapting the resolution to each of the plurality of viewers. Thus, it is possible to individually provide video information that can be easily viewed by each viewer.

Embodiment 1 FIG.
Hereinafter, the configuration of the large-screen display device according to Embodiment 1 of the present invention will be described with reference to FIG.

FIG. 1 is a configuration diagram of a large screen display device according to the first embodiment.
In FIG. 1, a display means 1 is a large, high-definition display device, for example, and displays display information data such as moving images, still images, and characters. A plurality of distance measuring means 2 are attached around the display means 1 and measure the distance (viewer distance) between the display means 1 and the viewer. The control unit 3 controls the display information and the display screen displayed on the display unit 1 based on the measurement information of the distance measurement unit 2. The display information storage unit 4 stores display information to be displayed on the display unit 1. The public display area generating unit 5 generates display information and display screens for an unspecified number of publics as public display areas based on the control information from the control unit 3. The private display area generating unit 6 generates display information and a display screen for a specific viewer as a private display area based on the control information from the control unit 3.

  Next, the operation of the large screen display device according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6 as appropriate.

FIG. 2 is a flowchart of the operation of the large screen display device in the first embodiment.
FIG. 3 is an overall overview diagram showing an example when a public display area is displayed on a large screen display device. In FIG. 3, the display means 1, the distance measurement means 2, the control means 3, the long-distance viewer 7, and the public display area 8 are shown.

  First, in step S201 of FIG. 2, the control means 3 generates public display area control information for instructing the setting conditions of the public display area, and the public display area generation means 5 based on the public display area control information. The display means 1 generates a public display area and displays the display information. The display means 1 is composed of a multi-screen display using, for example, an LCD (Liquid Crystal Display), PDP (Plasma Display Panel), rear projection, etc., and an integrated display screen is maintained while maintaining the display resolution for the number of screens. It has a high definition display function that is not enlarged display.

  Further, display information data such as moving images, still images, and characters displayed on the display unit 1 is stored in the display information storage unit 4 of FIG. 1 and read by the control unit 3. The control means 3 controls the generation conditions of the public display area or the private display area based on the display information data and the control information for controlling the display. In accordance with these generation conditions, the display information data is displayed on the display unit 1 by the public display area generation unit 5 or the private display area generation unit 6.

  The display information data may be accompanied by sound information such as sound effects, music, or voice for the display information. Further, the display information data may be data distributed in real time by, for example, broadcasting or a telecommunication line in addition to the data stored in the display information storage unit 4.

  Next, in step S202, the distance measuring unit 2 starts measuring the distance between the display unit 1 and the viewer (viewer distance). The distance measuring means 2 is composed of a plurality of distance sensors as shown in FIG. 3 and detects individual distances from the viewer who views the display means 1. Furthermore, the distance between the display means 1 and the torso (body distance) and the distance between the display means 1 and the head (head distance) are detected for one viewer.

  These distance sensors are assumed to be, for example, an infrared sensor, an ultrasonic sensor, or an image sensor using a camera. The range of the distance measurement is preferably a resolution that can measure the distance to the viewer 7 within a distance of 5 m from the screen of the display unit 1. Furthermore, within a distance of 3 m, for example, a resolution that can measure the viewer's torso and head separately is desirable. These distance sensors are arranged on the outer periphery of the display unit 1 and perform distance measurement, for example, like the distance measurement unit 2 shown in FIG.

  After executing the above step S202, the display means 1 normally keeps the public display area 8 displayed as shown in FIG. 3, and is easy to see for many viewers (far-distance viewers 7) viewing from a distance. Display information is displayed in size. In this state, the private display area 10 described later is not displayed, and the public display area 8 is displayed on the entire surface of the display means 1. Such display control is performed by the control means 3.

  Next, in step S <b> 203, the control unit 3 determines whether the distance (viewer distance) to the viewer measured by the distance measuring unit 2 is equal to or less than a predetermined threshold.

FIG. 4 is an overall overview diagram showing an example when a viewer approaches the large screen display device.
In FIG. 4, a display unit 1, a distance measuring unit 2, a control unit 3, a long-distance viewer 7, a public display area 8, a short-distance viewer 9, and a private display area 10 are shown. Here, the short-distance viewer 9 is a viewer who approaches the display unit 1 in order to see the display information on the display unit 1 closely, and depends on the distance (viewer distance) between the display unit 1 and the viewer. Identified.

  In FIG. 4, it is assumed that a viewer who wants to see the display screen close to the display unit 1 first approaches. At this time, the distance between the viewer who is approaching and the display unit 1 is measured by the distance measuring unit 2 which starts the measurement in step S202, and the distance of the measurement result is transmitted to the control unit 3 together with the identification number of the measured distance sensor. To do. Note that the identification number of the distance sensor may include not only numbers but also alphabets and symbols. The identification number of the distance sensor may be a channel number of an interface board that converts an analog signal that is measurement data of the distance sensor into a digital signal.

  The control means 3 determines whether the distance of the measurement result is a predetermined threshold, for example, 3 m or less. As a result of the determination, if the distance of the measurement result is equal to or less than a predetermined threshold value, it is assumed that the presence of the short-distance viewer 9 is detected, the viewer who is approaching is identified as the short-distance viewer 9, and the Yes The process proceeds to step S204 by branching. If the distance of the measurement result is larger than a predetermined threshold value, it is considered that the presence of the short-distance viewer 9 has not been detected, and the process returns to step S203 again by No branch, and the determination is continued.

  Next, in step S204, the control means 3 displays the private information to be displayed to the near-field viewer 9 that has detected the presence according to the position of the near-field viewer 9 that has detected the presence and the distance of the measurement result. The position and size of the display area 10 are determined. FIG. 5 is a diagram illustrating an example of the private display area 10. The area of the display screen of the private display area 10 is a display screen having a humanoid area that matches the outer shape of the upper body of the short-distance viewer 9 in order to make it as difficult as possible to see from the long-distance viewer 7.

  The control means 3 has a correspondence table of the identification numbers of a plurality of distance sensors used as the distance measurement means 2 and the positions of these distance sensors, and the identification number of the distance sensor that measures the viewer distance of the near-field viewer 9 Thus, the position of the measured distance sensor is referred to, and this is regarded as the position where the short distance viewer 9 stands, and the position where the private display area 10 is displayed is determined.

  Further, the size of the private display area 10 is determined according to the distance of the measurement result. In this way, the control means 3 uses the front of the short-distance viewer 9 as the display position. Furthermore, when the short-distance viewer 9 approaches the display means 1, the private display area 10 is set to a relatively small size. Control information on the position and size of the private display area 10 is generated so that the viewer 9 becomes a life-size size as the viewer 9 approaches the display means 1.

  Next, in step S205, the control means 3 determines the resolution, which is the display density of the display information in the private display area 10, according to the distance of the near viewer 9 and the size of the private display area 10, for example, The resolution of the private display area 10 is determined so that the display information becomes finer than the display information of the public display area 8. At this time, the display information whose resolution is determined is, for example, character information presented to the near-field viewer 9 or image information such as a moving image or a still image. This makes it difficult for the long-distance viewer 7 to see the display information in the private display area 10, and allows the short-distance viewer 9 to provide as much information as possible with display information of an appropriate size.

  Next, in step S206, the private display area generation means 6 generates the private display area 10 on the display means 1 based on the position and size control information of the private display area 10 generated by the control means 3, and displays the display information. Is displayed.

  Next, in step S207, the control means 3 determines an excluded display area excluding the display area of the private display area 10 based on the information on the position and size of the private display area 10 determined in step S204. Based on the excluded display area, control information for reconfiguring the public display area 8 is generated. In the reconstruction of the public display area 8, the display information layout is arranged so that the display information displayed in the public display area 8 avoids the display area of the private display area 10 based on the position and size information of the private display area 10. Control information is generated by changing the character of the display information so as not to lose the information. At this time, the display density of the display information in the public display area 8 is not changed.

  Further, when there are a plurality of short-distance viewers 9 at different positions, a plurality of private display areas 10 correspond to the respective short-distance viewers 9, and when the short-distance viewers 9 are close to each other, In some cases, a plurality of private display areas 10 are displayed overlapping each other. At this time, the control means 3 determines the short-distance viewer 9 closest to the display means 1 and controls to display the private display area 10 corresponding to the short-distance viewer 9 in the forefront. Generate control information.

  Next, in step S208, the public display area generation unit 5 generates the public display area reconstructed in step S207 on the display unit 1 based on the control information generated by the control unit 3, and displays the display information.

The above is the description of the basic operation of the large screen display device in the first embodiment.
Next, an operation for controlling the resolution of the display information displayed in the private display area 10 to be adapted to the personal visual acuity of the short-distance viewer 9 will be described with reference to FIGS.

FIG. 6 is a side view showing a state of the short-distance viewer 9 who sees the large screen display device in the vicinity.
FIG. 7 is a side view showing another state of the near-field viewer 9 who sees the large screen display device in the vicinity.
In FIG. 6 and FIG. 7, each distance sensor of the distance measuring means 2 is a distance to the head 11 of the short-distance viewer 9 in addition to the distance to the trunk of the short-distance viewer 9 (trunk distance). (Head distance) is also measured. FIG. 6 shows a state in which the short distance viewer 9 first views the private display area 10 displayed on the display device 1. Further, FIG. 7 shows that the head 11 of the short-distance viewer 9 tilts forward in order to look closer to the display information in the private display area 10 when the short-distance viewer 9 has insufficient personal vision. Shows the state.

  First, when the near-field viewer 9 views the private display area 10 for the first time, it is assumed that the resolution of the display information in the private display area 10 is a character size as shown in FIG. Next, the distance measuring means 2 measures the distance of the torso and the distance of the head 11 from the display means 1 for the short distance viewer 9. Based on this measurement result, the control means 3 makes it easy to see the display information in the private display area 10 when the distance of the head 11 is close to the display means 1 with respect to the distance of the torso of the short-distance viewer 9. For example, the character size is increased and displayed as in the display information displayed in the private display area 10 of FIG. By controlling the display information in this way, the resolution of the display information displayed in the private display area 10 can be adapted according to the personal visual acuity of the short-distance viewer 9.

  As described above, according to the first embodiment, the private display screen for each viewer is displayed simultaneously and independently, and the resolution is individually adapted to each of the plurality of viewers. Thus, there is an effect that the individual display information for each viewer can be provided in an easily adaptable manner for each viewer.

Embodiment 2. FIG.
As described above, the large-screen display device of the first embodiment displays the private display area 10 for each viewer simultaneously and independently, and individually adapts the resolution to each of the plurality of viewers. Next, a second embodiment in which the private display area 10 is moved following the moving viewer when the viewer moves relative to the display means 1 will be described. . Hereinafter, the large-screen display device according to the second embodiment will be described with reference to FIG.

FIG. 8 is a configuration diagram of the large screen display device according to the second embodiment.
In the second embodiment, in addition to the configuration of the first embodiment, a movement detection unit 12 and a movement history storage unit 13 are newly provided. Other configurations are the same as those in the first embodiment, and thus description thereof is omitted.

  In FIG. 8, when the control unit 3 detects the presence of the near-field viewer 9 from the measurement result of the distance sensor of the distance measurement unit 2, the control unit 3 executes a series of processes from step S204 to step S208 in FIG. The identification number of the distance sensor that measured the viewer distance of the near-field viewer 9, the position of the distance sensor corresponding to the identification number, the viewer distance of the near-field viewer 9, and the distance sensor measured the viewer distance Information on the measurement time is transmitted to the movement detection means 12 as distance measurement result information.

  Next, the movement detection means 12 stores the past distance measurement result information transmitted from the control means 3 as movement history in the movement history storage means 13 for each measurement time. Furthermore, the movement detection means 12 refers to the distance measurement result information stored in the past, and compares the distance measurement result information at the current measurement time to determine whether or not the near distance viewer 9 is moving. As a method for this determination, for example, a distance sensor indicating a distance closest to the near-field viewer 9 at the next measurement time when a position of the distance sensor indicating the distance closest to the near-field viewer 9 at a certain measurement time is used. What is necessary is just to determine with the short-distance viewer 9 moving, when it adjoins the position of.

  Note that the determination as to whether or not the near-field viewer 9 is moving is based on whether the distance between the distance sensors is close within a predetermined threshold, for example, in addition to the adjacent distance sensors. You may do it. Alternatively, for example, a method of determining the movement of the short-distance viewer 9 by calculating the position of the short-distance viewer 9 by combining the measurement values of a plurality of distance sensors located in the vicinity of the short-distance viewer 9. good. Furthermore, for example, the position of the near-field viewer 9 is calculated by using a plurality of omnidirectional detection type distance sensors that can detect the distance and angle with the near-field viewer 9 existing not only in the front but also at an oblique position. Thus, a method of determining the movement of the short-distance viewer 9 may be used.

  Next, when the movement detection unit 12 detects the movement of the short-distance viewer 9, the control unit 3 receives the movement detection notification from the movement detection unit 12 and receives the short-distance viewer 9 corresponding to the current measurement time. Control information for display is generated by determining the display screen of the private display area 10, display information, and the resolution of the display information so that the private display area 10 is displayed in accordance with the position of the display. Thereafter, a series of processing from step S206 to step S208 in FIG. 2 is executed.

  By repeatedly executing such processing, the private display area 10 can be moved following the moving short-distance viewer 9 when the short-distance viewer 9 moves relative to the display means 1. it can.

  Furthermore, even when two or more short-distance viewers 9 cross each other, the movement history storage means 13 manages the movement history for each detected short-distance viewer 9 so that each short-distance viewer 9 has Movement can be detected.

  For example, first, an identification number is assigned to the distance measurement result information of each near-field viewer 9 detected by the movement detection unit 12 and stored in the movement history storage unit 13. Next, when each new short-distance viewer 9 is detected, the distance measurement result information of each identification number stored in the movement history storage means 13 and the distance measurement result information of each new short-distance viewer 9 , Each new near-field viewer 9 determines whether or not the already detected near-field viewer 9 has moved. If the detected near-field viewer 9 moves as a result of the determination, the identification number of the near-field viewer 9 is assigned to the distance measurement result information of each new near-field viewer 9. On the other hand, when the detected near-field viewer 9 has not moved, a new identification number is issued and added to the distance measurement result information of each new near-field viewer 9.

  By doing so, it is possible to detect movement for each short-distance viewer 9, and even after two or more short-distance viewers 9 cross, The area 10 can be moved.

  As described above, according to the second embodiment, when the near-field viewer 9 moves with respect to the display unit 1, the private display area 10 is moved following the moving near-field viewer 9. Therefore, the short distance viewer 9 can freely browse the private display area 10 while freely moving with respect to the public display area of the display means 1, and the convenience of the short distance viewer 9 is improved.

1 is a configuration diagram of a large screen display device in Embodiment 1. FIG. 3 is a flowchart of the operation of the large screen display device in the first embodiment. In Embodiment 1, it is the whole general | schematic figure which shows an example in case the public display area 8 is displayed on the big screen display apparatus. In Embodiment 1, it is the whole general-view figure which shows an example when a viewer approaches the large screen display device. 3 is a diagram illustrating an example of a private display area 10 according to Embodiment 1. FIG. In Embodiment 1, it is a side view which shows the state of the short-distance viewer 9 who sees a large screen display apparatus near. In Embodiment 1, it is a side view which shows another state of the short-distance viewer 9 who sees a large screen display apparatus near. FIG. 6 is a configuration diagram of a large screen display device in a second embodiment.

Explanation of symbols

1 display means, 2 distance measurement means, 3 control means, 4 display information storage means, 5 public display area generation means, 6 private display area generation means, 7 long-distance viewer, 8 public display area, 9 short-distance viewer, 10 Private display area, 11 Head of short-distance viewer, 12 Movement detection means, 13 Movement history storage means.

Claims (9)

Display means for displaying information to be provided to viewers;
Public display area generating means for generating a public display area for displaying information for unspecified viewers on the display means;
A private display area generating means for generating a private display area for displaying information for a specific viewer on the display means;
Control means for controlling the generation conditions of the public display area generated by the public display area generation means, and for controlling the generation conditions of the private display area generated by the private display area generation means;
A distance measuring means for measuring a distance between the display means and the viewer as a viewer distance, and providing an identification number for identifying the viewer distance to the viewer distance;
The control means includes a correspondence table between the identification number and the installation position of the distance measuring means, and the viewer who has the viewer distance measured by the distance measuring means within a predetermined threshold is the specific viewing Identifying as a person, obtaining the identification number of the distance measuring means that measured the viewer distance when the specific viewer was identified, obtaining the installation position corresponding to the identification number from the correspondence table, A large screen display characterized in that, based on the installation position, a position where the specific viewer exists is determined as a specific viewer position, and the generation condition of the private display area displayed at the specific viewer position is controlled. apparatus. The said control means determines the display size of the said private display area according to the said viewer distance, and controls the production | generation conditions of the said private display area based on this display size . Large screen display device. The control means determines an exclusion display area excluding the display area of the private display area from the display means, and controls the generation condition of the public display area based on the exclusion display area. The large-screen display device according to claim 1 or 2 . The said control means determines the resolution showing the display density of the information for the said specific viewer according to the said viewer distance, and controls the production | generation conditions of the said private display area based on this resolution. The large-screen display device according to any one of claims 1 to 3 . The large-screen display device according to claim 4, wherein the resolution is a display density of character information displayed in the private display area . The large-screen display device according to claim 4, wherein the resolution is a display density of image information displayed in the private display area . The distance measuring means measures a head distance, which is a distance between the head of the specific viewer and the display means, and a torso distance, which is a distance between the torso of the specific viewer and the display means, respectively. And
The said control means enlarges the display of the information for the said specific viewer, when the said head distance measured by the said distance measurement means is smaller than the said trunk | drum distance. Item 7. The large screen display device according to any one of Items 6 to 7 . A movement history storage means for storing a movement history including a past position of the specific viewer position determined by the control means;
Movement detection means for detecting a change in the specific viewer position based on the movement history and the current position of the specific viewer position determined by the control means;
The control means updates the display position of the private display area according to the change in the specific viewer position detected by the movement detection means, and controls the generation conditions of the private display area based on the display position. The large-screen display device according to claim 1 , wherein the large-screen display device is provided. The movement history storage means distinguishes and stores the movement history for each specific viewer when there are a plurality of the specific viewers,
The movement detection means detects a change in the specific viewer position for each specific viewer based on the movement history stored by the movement history storage means,
The control means updates the display positions of the plurality of private display areas according to changes in the specific viewer positions for the specific viewers detected by the movement detection means, and based on these display positions. 9. The large screen display device according to claim 8, wherein a generation condition of the private display area displayed at each of the specific viewer positions is controlled .

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