JP2006092089A - Image display device and image-displaying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily grasp a portion, which a projector projects, on an image displayed on an image display device when the projector captures at least a portion of the image displayed on the image display device and projects the image thus captured. <P>SOLUTION: In an image display system 1, an electronic portable terminal 100 is connected to a projector 200 via a prescribed interface. The electronic portable terminal 100 is provided with; a position detection means 130 which detects its own position on an arranged face 10; an extraction area determination part 159 which determines an area on a displaying medium 154 based on the position; an image extraction part 155 which extracts an image displayed on the area; and a transmission part 157 which transmits the extracted image to the projector 200. The image extracted by the image extraction part 155 is displayed on the projector 200. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image display device and an image display system for displaying an image.

  Conventionally, as a method for projecting an image displayed on an image display device by a projector and projecting the captured image, the projector displays substantially the same as the image displayed on the image display device as described in Patent Document 1 below. The image signal is sent to the projector via a cable, and the projector side projects an image generated based on the received image signal.

JP 2004-69996 A

  However, in the conventional method, an image substantially the same as the image displayed on the image display device is displayed on the projector. For example, when a part of the document displayed on the image display device is enlarged and displayed, It has been difficult to grasp where the projected image corresponds to the entire document.

  In order to solve the above-described problems, an image display system according to the present invention includes an image display device that displays input data on a display medium, and a projection display device that projects and displays an image generated based on the input data. And an image display system connected via a predetermined interface, wherein a predetermined area on the display medium is determined in accordance with a position where the image display device has moved, and is within the predetermined area. The displayed image is displayed on the projection display device.

  According to the image display system of the present invention, the predetermined area on the display medium of the image display apparatus is determined in accordance with the moved position of the image display apparatus, and an image displayed in the predetermined area. Is projected by a projection display device. Therefore, the user of this image display system can visually recognize the image displayed on the display medium of the image display device and the image projected and displayed on the projection display device at substantially the same time. Thus, the location displayed by the projection display device can be easily grasped.

  In order to solve the above-described problems, an image display device of the present invention is an image display device that displays input data on a display medium, and the position of the image display device itself on a surface on which the image display device is installed. A position detection unit that detects a region, a region determination unit that determines a region on the display medium based on the detected position, an image extraction unit that extracts an image displayed in the region, and the extracted image And an image output unit for outputting to the outside.

  According to the above configuration, the area on the display medium of the image display device is determined according to the moved position of the image display device, and the image displayed in this area is extracted, Output to the outside.

  The image display device of the present invention preferably further includes an area setting unit for setting the size of the area.

  According to the present invention, since the size of the area can be set by the area setting unit, the range of the image output to the outside can be easily adjusted.

  In the image display device of the present invention, the position detection unit may calculate based on a movement amount of the image display device moving on the surface.

  According to this invention, the image display device calculates its own position from the amount of movement that moves on the surface on which the image display device is installed, so that it is not necessary to install a reference point for calculating the position. If the display device can be installed on the surface, the position of the image display device can be detected.

  In the image display system of the present invention, the image display device includes a position detection unit that detects a position of the image display device on a surface on which the image display device is installed, and an area on the display medium based on the position. It is preferable that the projection display device includes an image extraction unit that extracts an image displayed in the region on the display medium.

  According to the present invention, by providing the image display unit in the projection display device, the processing load of the image display device is distributed, and various functions as the image display system can be processed efficiently.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)

FIG. 1 is a perspective view showing an appearance of an image display system 1 according to the first embodiment. The image display system 1 includes an electronic portable terminal 100 and a projector 200.
The electronic portable terminal 100 is one of image display devices that display input data. The electronic portable terminal 100 is installed on the plane 10 in an external view and a flat plate shape. A liquid crystal display 125 and operation buttons 120 for operating the electronic portable terminal 100 are disposed on the surface portion of the electronic portable terminal 100.
In addition, a part of the back surface portion is in contact with the plane 10, and the movement detection ball 131 of the position detection unit 130 (FIG. 4) disposed on the back surface portion is also disposed in contact with the plane 10. The configuration of the position detection unit 130 will be described later.
Further, a connection terminal 105 for outputting an analog image signal is disposed on one side surface portion of the electronic portable terminal 100. The analog image signal is an RGB signal, a composite image signal, or the like.

The projector 200 is one of projection-type display devices that project and display an image generated based on input data, and has an external appearance and a rectangular parallelepiped shape. A projection lens 231 is disposed on one side surface of the projector 200. The projection lens 231 projects an optical image, and the projected optical image is projected as a projection image 20 on a screen installed in the projection direction of the projection lens 231. An operation button 217 for operating the projector 200 is disposed on the upper surface of the projector 200.
A connection terminal (not shown) is disposed on the other side surface of the projector 200. The connection terminal and the connection terminal 105 of the electronic portable terminal 100 are connected by the cable 30, and an analog image signal output from the electronic portable terminal 100 is configured to be sent to the projector 200.
Further, in the image display system 1, a display area 128 is displayed on the liquid crystal display body 125 of the electronic portable terminal 100, and the content displayed in the display area 128 is projected by the projector 200 by the projected image 20. As a projection function. This function will be described later.

(Hardware configuration)
Next, the hardware of the electronic portable terminal 100 will be described. FIG. 2 is a diagram illustrating a hardware configuration of the electronic portable terminal 100. The hardware of the electronic portable terminal 100 includes a CPU (Central Processing Unit) 110, a ROM (Read Only Memory) 111, a RAM (Random Access Memory) 112, a flash memory 113, a display controller 114, a VRAM (Video RAM) 115, media drive 116, operation input unit interface 117, communication interface 118, and A / D converter 136. These hardware resources are connected to each other via a bus 119.

The CPU 110 constitutes display control means, reads a program stored in the ROM 111 as necessary, and expands and stores the read program in the RAM 112. In addition, the CPU 110 is configured to control each hardware resource of the electronic portable terminal 100 by reading and executing a program loaded in the RAM 112 as necessary.
The VRAM 115 is a buffer for writing image data to be displayed on the liquid crystal display 125 according to an instruction from the CPU 110.
The display controller 114 converts the image data stored in the VRAM 115 into a display signal in accordance with an instruction from the CPU 110 and displays the display signal on the liquid crystal display 125.
The flash memory 113 is a storage unit that temporarily stores data in accordance with an instruction from the CPU 110.
The communication interface 118 constitutes the transmission unit 157 (FIG. 5) and is an interface for transmitting an analog image signal to the connected projector 200.
The media drive 116 is a device that reads information from the recording medium 90. As the recording medium 90, for example, a compact flash (registered trademark) can be adopted.
The A / D converter 136 receives an analog signal output from the rotary encoder 133 included in the position detector 130 (FIG. 4) and converts it into a digital signal.

Next, the hardware of the projector 200 will be described. FIG. 3 is a diagram showing a hardware configuration of the projector 200. As shown in FIG. The hardware of the projector 200 includes a CPU 210, a ROM 211, a RAM 212, an operation input unit interface 216, a communication interface 213, an image signal processing controller 214, and a liquid crystal light valve controller 215. These hardware resources are connected to each other via a bus 218.
The CPU 210 reads out the program stored in the ROM 211 as necessary, and expands and stores the read program in the RAM 212. In addition, the CPU 210 is configured to control each hardware resource of the projector 200 by reading and executing a program developed in the RAM 212 as necessary.
The communication interface 213 constitutes the reception unit 250 (FIG. 5) and is an interface that receives an analog image signal transmitted from the electronic portable terminal 100.
The image signal processing controller 214 performs A / D conversion on the analog image signal received from the electronic portable terminal 100 into a digital image signal, and then performs image processing such as gamma correction on the converted digital image signal. Further, the signal is written into the image memory 219 and temporarily stored.
The liquid crystal light valve controller 215 drives the liquid crystal light valve 224 of the projection image generation optical system 220.

(Configuration and function of projector optical system)
Next, an outline of the optical system of the projector 200 will be described. The optical system of the projector 200 includes a projection image generation optical system 220 configured to be incorporated in a housing of an optical component called a light guide, and projection optics for projecting a projection image generated by the projection image generation optical system 220. And a system 230.
The projection image generation optical system 220 includes a light emitting unit 221, a light source optical system 222, a color separation optical system 223, a liquid crystal light valve 224, and a color synthesis optical system 225.
The light emitting unit 221 includes a light source lamp and a reflector as a radiation light source (not shown), and a radial light beam emitted from the light source lamp is reflected by the reflector to become a substantially parallel light beam and is emitted to the outside.
The light source optical system 222 makes the intensity distribution of the light beam emitted from the light emitting unit 221 substantially uniform by a lens array (not shown).

The color separation optical system 223 separates the illumination light emitted from the light source optical system 222 into light of three colors, that is, red, green, and blue, respectively, in different wavelength ranges by a dichroic mirror (not shown).
The liquid crystal light valve 224 uses, for example, a polysilicon TFT as a switching element, is provided for each color light separated by the color separation optical system 223, and according to image information input from the liquid crystal light valve controller 215, The color light incident from each light incident surface is modulated, and the modulated light is emitted as transmitted light.
The color synthesis optical system 225 emits light representing a color image by synthesizing the modulated light of each color emitted from the liquid crystal light valve 215 of each color light by a cross dichroic prism (not shown).
The projection optical system 230 projects the image emitted from the color synthesis optical system 225 onto the screen. Note that the projection optical system 230 is provided with a projection lens (not shown) with a zoom function so that the projected image can be scaled (enlarged or reduced).

(Configuration and function of position detector)
Next, the position detection unit 130 of the electronic portable terminal 100 will be described. FIG. 4 is a diagram illustrating a configuration of the position detection unit 130. The position detection unit 130 includes a movement detection ball 131, a roller 132, a guide roller (not shown), and a rotary encoder 133 that converts the rotation of the roller 132 into an electric signal. In addition, the functional unit that processes the electrical signal includes an X-axis rotational speed calculation unit 134A, a Y-axis rotational speed calculation unit 134B, and a calculation unit 135. Note that the X-axis rotation speed calculation unit 134A, the Y-axis rotation speed calculation unit 134B, and the calculation unit 135 are configured so that hardware resources such as the CPU 110, RAM 112, and ROM 111 described above and software stored in the ROM 111 and the like are organically organic. These functions are realized through collaboration.
The movement detection ball 131 is made of hard rubber, for example, and rotates as the electronic portable terminal 100 moves on the surface 10.
The roller 132 is disposed at two positions that are in contact with the movement detection ball 131 and orthogonal to each other. Therefore, the rotation of the movement detection ball 131 is transmitted to each of the rollers (132A, 132B).
The guide roller is formed of an elastic member and is disposed so as to press the movement detection ball 131 against the roller 132.

The rotary encoders (133A, 133B) are directly connected to the respective rollers (132A, 132B). Therefore, the rotation of the movement detection ball 131 divided in two orthogonal directions (X axis and Y axis) is converted into an electric signal by the respective rotary encoders (133A, 133B).
Here, the electrical signal converted by one rotary encoder 133A is sent to the Y-axis rotation speed calculation unit 134B, and the rotation speed is calculated. Similarly, the electrical signal converted by the other rotary encoder 133B is sent to the X-axis rotational speed calculation unit 134A, and the rotational speed is calculated.
Next, each calculated rotation number is sent to the calculation unit 135. The calculation unit 135 calculates the movement amount in the X-axis direction and the movement amount in the Y-axis direction from the start of rotation of the movement detection ball 131 based on the diameter ratio between the movement detection ball 131 and the roller 132. .

(Function of image display system)
Next, each function of the image display system 1 will be described. FIG. 5 is a block diagram illustrating functions of the image display system 1.
In this image display system 1, the electronic portable terminal 100 includes a data input unit 150, a storage unit 151, a drawing processing unit 152, a display control unit 153, a display medium 154, a display area drawing unit 158, and an image extraction. A unit 155, an image signal generation unit 156, an extraction region determination unit 159, a position detection unit 130, an extraction region setting unit 160, and a transmission unit 157.
The data input unit 150 includes a media drive 116 and reads a file storing data from the recording medium 90 loaded in the media drive 116.
The storage unit 151 includes a flash memory 113 and stores a file in which data input from the data input unit 150 is stored.
The drawing processing unit 152 includes the VRAM 115, and generates image data to be displayed on the display medium 154 from a file storing the data.
The display medium 154 includes a liquid crystal display body 125. The liquid crystal display 125 may be either a transmissive type or a reflective type, and may further have a display memory property.
The display control unit 153 includes the display controller 114 and converts the image data generated by the drawing processing unit 152 into a display signal that can be displayed on the liquid crystal display 125.

The extraction area setting unit 160 sets the size of the area displayed on the projector 200 from the areas displayed on the liquid crystal display 125. In the first embodiment, the size of the area displayed by the projector 200 is stored in the ROM 111 in advance, but can be set by the extraction area setting unit 160 even by a predetermined operation using the operation button 120.
Based on the size of the display area set by the extraction area setting unit 160 and the position information of the electronic portable terminal 100 detected by the position detection unit 130, the extraction area determination unit 159 displays the display displayed on the liquid crystal display 125. A display area 128 to be displayed by the projector 200 is determined from the data. In the first embodiment, immediately after the image display system 1 is activated, the position detection unit 130 is set so that the display region 128 is positioned at, for example, a substantially upper left position or a substantially central position of the liquid crystal display body 125. ing.
The image extraction unit 155 extracts image data included in the display area 128 determined by the extraction area determination unit 159 from the image data displayed on the liquid crystal display 125. Specifically, the image data included in the display area 128 determined by the extraction area determination unit 159 is extracted from the image data stored in the VRAM 115.
The image signal generation unit 156 generates an analog image signal from the image data extracted by the image extraction unit 155.
The transmission unit 157 constitutes an image output unit, and outputs the analog image signal generated by the image signal generation unit 156 to an external device such as the projector 200.
The display area drawing unit 158 generates image data for displaying the display area 128 determined by the extraction area determining unit 159 on the display medium 154 and draws it on the image data generated by the drawing processing unit 152.
Here, the extraction region determination unit 159, the image extraction unit 155, the image signal generation unit 156, the display region drawing unit 158, and the extraction region setting unit 160 are the CPU 110, These functions are realized by organically cooperating hardware resources such as the RAM 112 and the ROM 111 and software stored in the ROM 111 and the like.

In the image display system 1, the projector 200 includes a receiving unit 250, a projection signal generating unit 255, and the optical system described above.
The receiving unit 250 receives an analog image signal output from the transmitting unit 157 of the electronic portable terminal 100.
The projection signal generation unit 255 generates an image signal that can be projected from the received analog image data. In the projection signal generation unit 255, hardware resources such as the CPU 210, the RAM 212, the ROM 211, the image signal processing controller 214, and the liquid crystal light valve controller 215 described above, and software stored in the ROM 211 and the like cooperate organically. In this way, these functions are realized.

(Description of image display system operation)
Next, the operation of the image display system 1 will be described. FIG. 6 is a diagram illustrating an example of the operation of the image display system 1.
When the image display system 1 is operated, data input in a file format from the data input unit 150 of the electronic portable terminal 100A or data stored in the storage unit 151 can be displayed on the display medium 154 in the drawing processing unit 152. After being converted into display data, the display control unit 153 converts it into a display signal and displays it on the liquid crystal display 125A.
In addition, a preset display area 128A is displayed on the liquid crystal display 125A in an overlapping manner.
The image data displayed in the display area 128A is extracted by the image extraction unit 155, and then an analog image signal is generated by the image signal generation unit 156. This analog signal is transmitted from the transmission unit 157 to the projector 200. It is sent to the receiving unit 250.
The projection signal generation unit 255 of the projector 200 generates a display signal for the liquid crystal light valve 224 based on the received analog image signal. The liquid crystal light valve 224 is driven by this display signal, and an optical image is formed in the projection image generation optical system 220. This optical image is projected as a projection image 20A by the projection optical system 230.

Here, a case will be described in which the user of the image display system 1 moves the electronic portable terminal 100A in the lower right direction on the plane 10A to reach a position like the electronic portable terminal 100B on the plane 10B.
When the electronic portable terminal 100A moves, the position detection unit 130 detects the amount of movement, and then sends the position information of the moved electronic portable terminal 100B to the extraction region determination unit 159.
The extraction area determination unit 159 determines the display area 128B moved by the same movement amount in the direction opposite to the movement direction from the position information of the electronic portable terminal 100A.
The image data displayed in the display area 128B is extracted by the image extraction unit 155, the analog image signal is generated by the image signal generation unit 156, and then transmitted from the transmission unit 157 to the projector 200, as described above. To the receiver 250.
In addition, the liquid crystal light valve 224 is driven by the display signal generated by the projection signal generation unit 255 based on the analog image signal sent to the projector 200 as described above. As a result, an optical image is formed by the projection image generation optical system 220, and this optical image is projected as a projection image 20B by the projection optical system 230.
Further, the display area drawing unit 158 generates image data of the display area 128B in order to display the display area 128B on the display medium 154 after erasing the drawn display area 128A before movement. This image data is drawn by being superimposed on the image data generated by the drawing processing unit 152.
Furthermore, even when the electronic portable terminal 100 moves continuously, the display area 128 moves and is displayed in the display area 128 according to the movement of the electronic portable terminal 100 by repeating the above operation. The image data being projected is projected by the projector 200.

According to the first embodiment as described above, there are the following effects.
(1) Since the extraction area determination unit 159 and the image extraction unit 155 for operating as the image display system 1 are provided on the electronic portable terminal 100 side, it is not necessary to add a special function to the projector 200 side. Existing projectors can be used.
(Embodiment 2)

Next, Embodiment 2 of the present invention will be described with reference to FIG. In the following description, parts that are the same as those already described are given the same reference numerals and description thereof is omitted.
FIG. 7 shows functions of the image display system 1 according to the second embodiment. In the first embodiment described above, the image extraction unit 155 realizes its function by organically cooperating hardware resources on the electronic portable terminal 100 side and software. In the image display system 1, the image extraction unit 256 realizes a function by organically cooperating hardware resources on the projector 200 side and software.
That is, on the electronic portable terminal 100 side, the image signal generation unit 156 generates an analog image signal from the same image data as the image data drawn on the display medium 154, and the transmission unit 157 extracts the analog image signal and the extracted image data. A signal of information related to the display area 128 determined by the area determination unit 159 is transmitted to the projector 200.
The projector 200 receives the analog image signal and the information signal related to the display area 128 by the receiving unit 250 and generates a driving signal for the liquid crystal light valve 224 based on the analog image signal input to the projection signal generating unit 255. To do. Next, the image extraction unit 256 extracts a drive signal of an image included in the display region 128 from the drive signal generated by the projection signal generation unit 255 based on the information signal regarding the display region 128. Here, the liquid crystal light valve 224 is driven by the drive signal of the extracted image. As a result, an optical image is formed by the projection image generation optical system 220, and this optical image is projected as the projection image 20 by the projection optical system 230.
Also in the second embodiment, the following effects can be achieved.
(1) By providing the image extraction unit 256 on the projector 200 side, power consumption of the electronic portable terminal 100 can be suppressed.

As mentioned above, although this invention was demonstrated based on embodiment shown in figure, this invention is not limited to this, The modification as described below can also be assumed.
(1) Communication between the electronic portable terminal 100 and the projector 200 is not limited to communication via the cable 30 and may be communication by radio or infrared light.
(2) The movement detection in the position detection unit 130 is not limited to the method of detecting the rotation of the movement detection ball 131 by the rotary encoder 133, and the acquired image is obtained after the moving surface is acquired by including the light emitting unit and the light receiving unit. May be subjected to image processing to detect the moving direction and moving amount.

1 is a perspective view showing an appearance of an image display system according to Embodiment 1 of the present invention. The figure which shows the structure of the hardware of the electronic portable terminal in the said embodiment. FIG. 2 is a diagram showing a hardware configuration of a projector in the embodiment. The figure which shows the structure of the position detection part in the said embodiment. The block diagram which shows the function of the image display system in the said embodiment. The figure which shows an example of operation | movement of the image display system in the said embodiment. The figure which shows the function of the image display system of Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Image display system, 10 ... Plane, 20 ... Projection image, 30 ... Cable, 90 ... Recording medium, 100 ... Electronic portable terminal, 105 ... Connection terminal, 110 ... CPU, 111 ... ROM, 112 ... RAM, 113 ... Flash Memory 114, display controller 115 115 VRAM 116 media drive 117 operation input interface 118 communication interface 119 bus 120 operation button 125 liquid crystal display 128 128 display area 130 Position detection unit 131... Movement detection ball 132 132 Roller 133 Rotary encoder 134 A X-axis rotation number calculation unit 134 B Y-axis rotation number calculation unit 135 Calculation unit 136 A / D converter 150 ... Data input unit, 151 ... Storage unit, 152 ... Drawing processing unit, 153 ... Table Control unit, 154 ... display medium, 155 ... image extraction unit, 156 ... image signal generation unit, 157 ... transmission unit, 158 ... display region drawing unit, 159 ... extraction region determination unit, 160 ... extraction region setting unit, 200 ... projector , 210 ... CPU, 211 ... ROM, 212 ... RAM, 213 ... communication interface, 214 ... image signal processing controller, 215 ... liquid crystal light valve, 216 ... operation input interface, 217 ... operation buttons, 219 ... image memory, 220 ... Projected image generation optical system, 221... Light emitting unit, 222... Light source optical system, 223... Color separation optical system, 224... Liquid crystal light valve, 225. Receiving unit, 255... Projection signal generating unit, 256... Image extracting unit.

Claims (5)

An image display system in which an image display device that displays input data on a display medium and a projection display device that projects and displays an image generated based on the input data are connected via a predetermined interface. ,
A predetermined area on the display medium is determined according to a position where the image display device has moved,
An image display system, wherein an image displayed in the predetermined area is displayed on the projection display device. An image display device that displays input data on a display medium,
A position detection unit for detecting the position of the image display device itself on the surface on which the image display device is installed;
An area determining unit that determines an area on the display medium based on the detected position;
An image extraction unit for extracting an image displayed in the area;
An image display device comprising: an image output unit that outputs the extracted image to the outside. The image display device according to claim 2,
An image display device further comprising an area setting unit for setting the size of the area. The image display device according to any one of claims 2 to 3,
The position detection unit calculates an image display device based on a moving amount of the image display device moving on the surface. The image display system according to claim 1,
The image display device includes a position detection unit that detects a position of the image display device on a surface on which the image display device is installed, and an area determination unit that determines an area on the display medium based on the position. ,
The projection display device includes an image extraction unit that extracts an image displayed in the region on the display medium.

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