JP2010038938A - Projection display device, image projection display method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique by which a reduced page image (what is called a thumbnail image) is displayed in easy-to-view size. <P>SOLUTION: The projection display device includes: an image processing part that generates image data from a data file including a plurality of pages; an electrooptical device that forms image light in accordance with the image data; a projection optical system that projects the image light obtained by the electrooptical device; and an operation part that can perform screen switching operation to switch display on a projection surface. The image processing part includes a first mode in which the image of a designated page in the data file is displayed on an entire screen, and a second display mode in which the reduced page image group in the data file is displayed to be superimposed on at least a part of the entire screen display area on which the image of the designated page in the data file is displayed on the entire screen. The image processing part switches the first display mode and the second display mode mutually according to a screen switching requirement from the operation part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for projecting and displaying an image.

  As a technology for projecting and displaying an image, there is known a technique for displaying a thumbnail in a margin portion of an image caused by a difference in aspect ratio when image data is read from a memory card and displayed on a projection surface. (For example, Patent Document 1).

JP 2006-3395 A

  Conventionally, since thumbnail display is performed in the margin of the image caused by the difference in aspect ratio, there is a problem that the display of the thumbnail image becomes small.

  An object of the present invention is to provide a technique capable of displaying a reduced page image (so-called thumbnail image) in an easily viewable size.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
A projection display device that projects and displays an image, an image processing unit that generates image data from a data file including a plurality of pages, an electro-optical device that forms image light according to the image data, and A projection optical system for projecting image light obtained by the electro-optical device, and an operation unit capable of screen switching operation for switching the display on the projection surface, wherein the image processing unit is designated by the data file A first display mode for displaying an image of a page in full screen, and a reduced page image group of the data file in at least a part of a full screen display area in which an image of a specified page of the data file is displayed in full screen A second display mode for superimposing and displaying, wherein the image processing unit responds to a screen switching request from the operation unit, and includes the first display mode and the second display mode. Another is switchable, the projection display device.
In this way, since the reduced page image group is displayed so as to overlap the image of the currently projected page, there is no restriction on the area when the reduced page image is displayed. As a result, the reduced page image (so-called thumbnail image) can be displayed in a size that is easy to see. As a result, the presentation using the projected image can be performed more smoothly.

[Application Example 2]
In the projection display device according to the application example 1, the operation unit can perform a selection operation for selecting an arbitrary image from the reduced page image group in the second display mode. The projection display device, wherein the image processing unit displays a selected image in the first display mode in response to a selection request from the operation unit.
In this way, it is possible to switch the screen projection to an arbitrary page selected from the reduced page image group.

[Application Example 3]
3. The projection display device according to Application Example 1 or 2, wherein, in the second display mode, the reduced page image group of the file is superimposed and displayed on the entire full screen display area.
In this way, since the reduced page image can be displayed using the entire projection surface, a large number of reduced page images can be displayed simultaneously.

[Application Example 4]
4. The projection display device according to any one of application examples 1 to 3, wherein the second display mode superimposes the reduced page image group on a small area provided at one end of the full screen display area. A first submode for displaying the image and a second submode for displaying the reduced page image group superimposed on the entire full-screen display area. A projection display device capable of switching between the first sub-mode and the second sub-mode upon request.
In this way, a plurality of sub modes in which the arrangement of reduced page images is changed can be used properly according to the application.

  Note that the present invention can be realized in various modes. For example, the present invention can be realized in the form of a projection display device and method, a projection display device system, a computer program for realizing the functions of the method or device, a recording medium on which the computer program is recorded, and the like.

Next, embodiments of the present invention will be described in the following order based on examples.
A. Example:
B. Variations:

A. Example:
FIG. 1 is an explanatory diagram showing a schematic configuration of a projection display device and its external device as an embodiment of the present invention. The projection display device 100 (hereinafter also referred to as “projector”) is provided with a screen SC, a remote controller 300, a personal computer PC, and a memory medium MS as external devices. The projector 100 and the personal computer PC are connected by a USB cable. The projector 100 can project any type of file existing on the personal computer PC on the screen SC. The projector 100 also has an interface for inserting the memory medium MS. By inserting the memory medium MS into this interface, the projector 100 can project any type of file existing on the memory medium MS onto the screen SC. Furthermore, the projector 100 can project the same image as AV1 on the screen SC based on an analog image signal AV1 supplied from an image supply device (not shown). The projector 100 may be operated directly using a remote controller 300, or may be directly operated by providing an operation panel on the projector 100 main body.

  FIG. 2 is an explanatory diagram showing an example of the internal configuration of the projector 100 of FIG. The projector 100 includes a CPU 105, an analog image signal input unit 110, an image processing unit 120, a frame memory 125, a liquid crystal light valve driving unit 130, a liquid crystal light valve 135 as an electro-optical device, and a USB interface unit 140. , An external storage device 145, an internal storage device 150, a remote control signal processing unit 155, a memory medium control unit 160, an illumination optical system 200, and a projection optical system 205. In addition, the components other than the liquid crystal light valve driving unit 130, the liquid crystal light valve 135, the illumination optical system 200, and the projection optical system 205 are connected by a bus 105b.

  The CPU 105 is an electronic circuit for controlling each part of the projector 100. The analog image signal input unit 110 has a function of AD-converting the analog image signal AV1 and outputting digital image data DV1 when the analog image signal AV1 is supplied from an external image supply device (not shown). ing. The analog image signal AV1 includes, for example, an image signal such as an RGB signal representing a computer image supplied from a personal computer, or a composite image signal representing a moving image supplied from a video recorder or a television receiver. The USB interface unit 140 has a function of receiving an arbitrary type of data file AF supplied from the personal computer PC and supplying it to the internal storage device 150 via the bus 105b.

  The memory medium control unit 160 has a function of reading the data file AF stored in the memory medium MS and supplying the data file AF to the internal storage device 150 via the bus 105b. Various types of memory media MS can be used. For example, a USB memory or a memory card (a thin auxiliary storage device that looks like a card) can be used, but is not limited thereto. Remote control signal processing unit 155 controls the function of each unit of projector 100 based on a control signal from remote control 300. For example, the remote control signal processing unit 155 can control the function of the image processing unit 120 based on a control signal from the remote control 300 and superimpose a thumbnail image on the page image.

  The internal storage device 150 includes a ROM and a RAM (not shown), a storage area (not shown) for storing the supplied data file AF, and image data for each page from the data file AF (hereinafter referred to as “page image data”). And a reader 151 for obtaining the information. The reader 151 determines the type of the data file AF from the extension of the data file AF, information on the header, and the like. Then, the contents of the file are analyzed along the data format of the application in which the data file AF is created, and page image data is acquired. The reader 151 supplies the acquired page image data to the image processing unit 120 via the bus 105b. In addition, when there are a plurality of applications that can be displayed on the projector 100, it is preferable that the reader 151 be configured to include a plurality of readers for each application. For example, it is preferable to have a configuration including a power point file reader for a power point file, and similarly to a configuration including a PDF file reader for a PDF file and an excel file reader for an excel file. The data file AF can also be stored in any location other than the internal storage device 150. For example, the data file AF may be stored in an external storage device or the memory medium MS. Further, when the data file AF is a file existing in the memory medium MS, it is possible to directly read from the memory medium MS without storing it in the storage area. The external storage device 145 is a storage device including a hard disk (not shown). Since a refresh operation is not required, it is suitable for storing frequently used data files AF.

  The image processing unit 120 includes a thumbnail processing unit 121, a page processing unit 122, and an image composition unit 123. The page processing unit 122 supplies the page image data received via the bus 105b to the image composition unit 123. At this time, some image processing such as color correction may be performed on the page image data.

  The thumbnail processing unit 121 generates reduced page image data from the page image data received via the bus 105b and temporarily writes it in a buffer memory (not shown). Hereinafter, this “reduced page” is also referred to as “thumbnail”. Then, the thumbnail processing unit 121 generates image data of a thumbnail image group (hereinafter also referred to as “thumbnail list”) to be displayed on the screen SC, and supplies the image data to the image composition unit 123. The image data in the thumbnail list is generated as image data in which a number of thumbnails that can be displayed on the projection plane are arranged and arranged. The frame memory 125 temporarily stores image data of an image displayed on the screen SC.

  The image composition unit 123 has a function of generating composite image data by combining the page image data supplied from the page processing unit 122 and the image data of the thumbnail list supplied from the thumbnail processing unit 121. As a result, an image in which a thumbnail (reduced page image) represented by the image data in the thumbnail list is superimposed on the image represented by the page image data can be displayed on the screen SC. The image composition unit 123 temporarily writes the supplied page image data in the frame memory 125. When there is a request for thumbnail display, when reading the page image data written in the frame memory 125, the page image data and the thumbnail list image data are combined, and the combined image data DV2 is displayed on the liquid crystal display. Supplied to the light valve driving unit 130.

  The liquid crystal light valve driving unit 130 generates image display data SD in accordance with the image data DV2 supplied from the image composition unit 123. The liquid crystal light valve 135 is driven based on the image display data SD. At this time, the liquid crystal light valve 135 modulates light from the illumination optical system 200 to form image light representing an image. The liquid crystal light valve 135 is illuminated almost uniformly by the illumination optical system 200, and the image light formed by the liquid crystal light valve 135 is projected on the screen SC by the projection optical system 205. In FIG. 2, the illumination optical system 200 and the projection optical system 205 are simplified.

  FIG. 3 is an explanatory diagram illustrating an example of the remote controller 300. The remote controller 300 includes a thumbnail button 310, a cross key 320, an enter button 330, a cancel button 340, a menu button 350, and a lid 360. 3A and 3B show a state in which the lid 360 of the remote controller 300 is closed and an open state, respectively.

FIG. 4 is an explanatory diagram of processing for switching the projection screen of the projector 100 using the remote controller 300. FIG. 4A shows an example of an image displayed in full screen on the screen SC when normal image display is performed. This full screen display means that only the contents are displayed without window frame, toolbar, title bar, or the like. When the thumbnail button 310 is pressed while the page P1 is displayed on the full screen in this way, a thumbnail list can be displayed (FIG. 4B). This thumbnail list is a first sub-mode (hereinafter also referred to as “small thumbnail list”) in which thumbnails are displayed side by side on a part of the projection plane as shown in FIGS. 4B and 4B, and FIG. (C) and a second sub mode (hereinafter also referred to as “large thumbnail list”) for displaying thumbnails side by side on the entire projection surface as shown in (C1). The thumbnail processing unit 121 (FIG. 2) generates image data of a thumbnail list in a necessary form based on the switching request from the remote controller 300 and the setting values for various setting items, and the image composition unit 123 (FIG. 2). To supply. Setting values for various setting items are stored in advance in the internal storage device 150 (FIG. 2). This set value is preferably changeable by the user operating the remote controller 300. Examples of setting items are given below.
・ Size (or reduction ratio) per thumbnail image
-Size of the small thumbnail list screen-Display method of the small thumbnail list screen (for example, display at the left edge of the projection surface, display at the bottom edge of the projection surface)
-Initial cursor position of thumbnail list (for example, the first page is the default, the currently displayed page is the default)

  FIGS. 4B to 4B show examples of images displayed on the screen SC when screen transition is performed based on the small thumbnail list. By pressing the thumbnail button 310, it can be seen that a small thumbnail list is displayed at the left end portion of the page P1. In FIG. 4B, four thumbnails TP1 to TP4 are displayed in the small thumbnail list. In addition, a cursor for selecting a thumbnail is displayed on the thumbnail TP1 indicating the page P1, which is the current page. When the cross key 320 is pressed in this state, the cursor moves in the direction of the key, and an arbitrary thumbnail can be selected. Specifically, as shown in FIG. 4 (B1), the small thumbnail list can be scrolled by pressing the down key of the cross key 320. When the thumbnail list is scrolled in this way, the thumbnail processing unit 121 (FIG. 2) generates image data of the thumbnail list each time and supplies the image data to the image composition unit 123 (FIG. 2). When the image composition unit 123 reads the page image data written in the frame memory 125, the image composition unit 123 combines the page image data and the image data of the thumbnail list, and supplies the combined image data DV2 to the liquid crystal light valve driving unit 130. To do. When the determination button 330 is pressed while an arbitrary thumbnail (thumbnail TP6 in the figure) is selected, the selected page (page P6 in the figure) is displayed on the screen SC as shown in FIG. 4 (B2). If the thumbnail button 310 is further pressed while the small thumbnail list is displayed as shown in FIGS. 4B and 4B, the screen transitions to the screen shown in FIG. Also, as shown in FIGS. 4B and 4B, when the cancel button 340 is pressed in a state where the small thumbnail list is displayed, a transition is made to the screen of FIG. The screen transition by the cancel button 340 is not shown for convenience.

  4C to 4C show examples of images displayed on the screen SC when screen transition is performed using a large thumbnail list. When the thumbnail button 310 is pressed while the small thumbnail is displayed, it can be seen that the large thumbnail list is displayed on the entire screen on which the page P1 is displayed. In FIG. 4C, nine thumbnails TP1 to TP9 are displayed in the large thumbnail list. In addition, a cursor for selecting a thumbnail is displayed on the thumbnail TP1 indicating the page P1, which is the current page. When the cross key 320 is pressed in this state, the cursor moves in the direction of the key, and an arbitrary thumbnail can be selected as shown in FIG. 4 (C1). In addition, when the number of thumbnails is large, a method of displaying all thumbnails by scrolling the large thumbnail screen can be employed. Specifically, when the cursor is at one of the thumbnails TP7, TP8, and TP9 and the down key is pressed, the thumbnails displayed on one screen can be changed to TP4 to TP12. The processing of the thumbnail processing unit 121 (FIG. 2) and the image composition unit 123 (FIG. 2) at the time of scrolling is as described in FIG. 4 (B1). When the determination button 330 is pressed while an arbitrary thumbnail (thumbnail TP8 in the figure) is selected, the selected page (page P8 in the figure) is displayed on the screen SC as shown in FIG. 4 (C2). If the thumbnail button 310 or the cancel button 340 is further pressed while the large thumbnail list is displayed as shown in FIGS. 4C and 4C, the screen changes to the screen shown in FIG. The screen transition by the cancel button 340 is not shown for convenience.

  In this way, by displaying the thumbnail list screen so as to overlap the currently displayed page image, the thumbnail list screen can be displayed without being restricted by the display area. As a result, each thumbnail image can be displayed in a size that is easy to see. Further, by preparing a small thumbnail screen and a large thumbnail screen and making them switchable to each other, it is possible to select a thumbnail screen according to the application. Furthermore, by making it possible to set items for the thumbnail display method, it is possible to change the thumbnail size and the like, and to perform more flexible thumbnail display. As a result, it is possible to display an effective thumbnail for the user to smoothly proceed with the presentation.

B. Variations:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

B1. Modification 1:
In the above embodiment, the number of thumbnails displayed at a time on the small thumbnail screen is four, and the number of thumbnails displayed at a time on the large thumbnail screen is nine. The number of images can be arbitrarily set in relation to the size of the thumbnail image. For example, the number of thumbnails to be displayed can be determined in advance and stored as a setting value of the internal storage device. Further, it can be determined by calculating the number of thumbnails that can be displayed on the screen from the size (reduction ratio) per thumbnail image.

B2. Modification 2:
In the above embodiment, the thumbnail list only displays the thumbnail images side by side on the image of the current page. However, various methods can be used for the thumbnail display method. For example, the following method can be employed.
-Eliminate the transition between the small thumbnail list screen and the large thumbnail list screen and display only one of them.
・ To make it easier to see the thumbnail image, a semi-transparent colored background is provided under the thumbnail image.
A number indicating the page number of the thumbnail is displayed around the thumbnail image. For example, in the case of a small thumbnail list, a page number is displayed on the left side of the thumbnail image, and in the case of a large thumbnail list, a page number is displayed on the lower right side of the thumbnail image.

  In the above-described embodiments, the projector is used as the projection display device. However, the present invention is not limited to this, and a television or a display (including a display screen of a mobile phone or a portable information terminal) is also provided. Or you may make it target aurora vision.

In the above embodiment, a transmissive liquid crystal light valve is used as the electro-optical device, but a reflective light modulation device such as a reflective liquid crystal light valve can also be used. Also, a micromirror array device that modulates the light emitted from the light source 11 can be used by controlling the emission direction of the incident light for each micromirror as a pixel.

  In the above embodiment, the illumination optical system 200 is configured by a light source lamp, but a solid light source such as an LED (Light Emitting Diode) light source or other light sources can also be used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a schematic configuration of a projection display device and its external device as an embodiment of the present invention. It is explanatory drawing which shows an example of an internal structure of the projector 100 of FIG. It is explanatory drawing which shows an example of the remote control. FIG. 11 is an explanatory diagram of processing for switching the projection screen of the projector 100 using the remote controller 300.

Explanation of symbols

    DESCRIPTION OF SYMBOLS 100 ... Projection type display apparatus (projector), 105 ... CPU, 105b ... Bus, 110 ... Analog image signal input part, 120 ... Image processing part, 121 ... Thumbnail processing part, 122 ... Page processing part, 123 ... Image composition part, DESCRIPTION OF SYMBOLS 125 ... Frame memory, 130 ... Liquid crystal light valve drive part, 135 ... Liquid crystal light valve, 145 ... External storage device, 150 ... Internal storage device, 151 ... Reader, 155 ... Remote control signal processing part, 160 ... Memory medium control part, 200 ... Illumination optical system 205 ... Projection optical system 300 ... Remote control 310 ... Thumbnail button 320 ... Cross key 330 ... Set button 340 Cancel button 350 ... Menu button 360 ... Lid

Claims (6)

A projection display device that projects and displays an image,
An image processing unit for generating image data from a data file including a plurality of pages;
An electro-optical device that forms image light according to the image data;
A projection optical system for projecting image light obtained by the electro-optical device;
An operation unit capable of screen switching operation for switching the display on the projection surface;
With
The image processing unit
A first display mode for displaying an image of a specified page of the data file in full screen;
A second display mode in which a reduced page image group of the data file is superimposed and displayed on at least a part of a full screen display area where an image of a specified page of the data file is displayed on a full screen;
With
The projection display device, wherein the image processing unit is capable of switching between the first display mode and the second display mode in response to a screen switching request from the operation unit. The projection display device according to claim 1,
The operation unit is capable of performing a selection operation for selecting an arbitrary image in the reduced page image group during the second display mode,
The projection display device, wherein the image processing unit displays a selected image in the first display mode in response to a selection request from the operation unit. The projection display device according to claim 1 or 2,
The second display mode is a projection display device that displays a reduced page image group of the file superimposed on the entire full-screen display area. A projection display device according to any one of claims 1 to 3,
The second display mode is:
A first sub-mode for displaying the reduced page image group superimposed on a small area provided at one end of the full-screen display area;
A second sub-mode for displaying the reduced page image group superimposed on the entire full-screen display area;
With
The projection display device, wherein the image processing unit can switch between the first sub mode and the second sub mode in response to a request from the operation unit. An image projection display method,
(A) a computer projecting and displaying an image according to a display mode selected from a plurality of display modes;
(B) the computer switching the display mode in response to a display switching request;
With
The plurality of display modes are:
A first display mode for displaying an image of a specified page of a data file including a plurality of pages in a full screen;
A second display mode in which a reduced page image group of the data file is superimposed and displayed on at least a part of a full screen display area where an image of a specified page of the data file is displayed on a full screen;
Including
The image projection display method, wherein the step (b) includes a step of switching between the first display mode and the second display mode. A computer program,
A projection display function for projecting and displaying an image according to a display mode selected from a plurality of display modes;
A display switching function for switching the display mode in response to a display switching request;
Is a computer program that causes a computer to realize
The plurality of display modes are:
A first display mode for displaying an image of a specified page of a data file including a plurality of pages in a full screen;
A second display mode in which a reduced page image group of the data file is superimposed and displayed on at least a part of a full screen display area where an image of a specified page of the data file is displayed on a full screen;
Including
The display switching function includes a function of switching between the first display mode and the second display mode.

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