JPH11355696A - Image display device and record medium recording program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device which realizes an electronic blackboard projector that has functions of both a projector and an electronic blackboard with a simple configuration and a record medium on which a program is recorded. SOLUTION: Light from a light source 1 transmits a liquid crystal panel 3 on which an image is shown after infrared rays are eliminated by a filter 2 and is projected to a screen through a dichroic mirror 4 and a lens 5. Infrared rays from an infrared diode 8 provided at the point of a pointing pole 7 held by a user is reflected against the mirror 4 through the lens 5 and is converted into an electric signal by a two-dimensional CCD 9. A coordinate detection circuit 10 detects a light receiving position on the CCD 9 from the electric signal and realizes an electronic blackboard projector which has functions of both a projector and an electronic blackboard with a simple configuration by changing a detection position in the panel 3, the luminance or color of a corresponding pixel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image display device suitable for use in a projector and a recording medium recording a program.

[0002]

2. Description of the Related Art Conventional projectors include cameras and VTRs.
An image signal input from the device is converted into a light image and projected on a screen. On the other hand, in a conventional electronic blackboard, an image is displayed when a user indicates a position on a screen where a coordinate detection device is embedded.

[0003]

The conventional projector has only a function as a projection device for only an image signal input from a camera, a VTR, or the like. There has been a growing demand for using a projected image itself as a substitute for a blackboard, such as correcting a projected image. On the other hand, a conventional electronic blackboard requires a screen in which a coordinate detection device is embedded, and the system configuration is complicated, and installation is difficult.

The present invention has been made in view of the above circumstances, and provides an image display device that realizes an image display device having both functions of a projector and an electronic blackboard with a simple configuration, and a recording medium on which a program is recorded. Aim.

[0005]

According to a first aspect of the present invention, there is provided a display device for displaying an input image signal as an optical image, and displaying the optical image displayed by the display device. Projection means for projecting on a screen,
Light detecting means for detecting light of a predetermined wavelength from a light emitting means moving on a screen, photoelectric converting means for receiving the light of the predetermined wavelength detected by the light detecting means and converting the light into an electric signal, and photoelectric converting means Detection processing means for detecting information of the received position detected by the light detection means based on the electric signal converted by the processing, and processing a signal of a pixel corresponding to a position corresponding to the received position on the display means; It is characterized by having.

According to a second aspect of the present invention, in the first aspect, the detection processing means changes the luminance or the color of the pixel signal.

According to a third aspect of the present invention, in the first aspect, the display means includes a light source, a filter for removing light of a predetermined wavelength from the light of the light source, and a liquid crystal panel illuminated with the light from the filter. And characterized by comprising:

According to a fourth aspect of the present invention, in the first aspect, the projection means and the light detection means transmit a light image, reflect light of a predetermined wavelength from a light source, and enter the photoelectric conversion means. And a dichroic mirror.

According to a fifth aspect of the present invention, in the first aspect, the photoelectric conversion means is constituted by a two-dimensional CCD.

A sixth aspect of the present invention is characterized in that, in the first aspect of the present invention, the detection processing means outputs detected position information.

According to a seventh aspect of the present invention, there is provided a display processing for displaying an input image signal as an optical image, a light detection processing for detecting light of a predetermined wavelength from a light emitting means moving on a screen, and a light detection processing. A photoelectric conversion process of receiving light of a predetermined wavelength detected by the photoelectric conversion process and converting the received light into an electric signal; a light receiving position detection process of detecting a position of light received based on the electric signal converted by the photoelectric conversion process; A program for executing a processing for processing a signal of a pixel at a position corresponding to a position at which light is detected detected by the light receiving position detection processing is recorded.

An eighth aspect of the present invention is characterized in that, in the seventh aspect of the present invention, the processing includes recording a program for changing luminance or color of a pixel signal.

According to a ninth aspect of the present invention, in the seventh aspect, a program for executing an output process for outputting detected position information is recorded.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an image display device and a recording medium in which a program is recorded according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a configuration diagram showing an embodiment of an image display device according to the present invention used as an electronic blackboard projector.

In FIG. 1, a projector 11 according to an embodiment of the present invention includes a light source 1, a filter 2 for removing infrared rays from light from the light source 1, and a liquid crystal panel for converting an input image signal into a light image. 3, a dichroic mirror 4, and an infrared reflection layer 4a on the back surface.
It comprises a lens 5 and a screen 6. Further, a pointing rod 7 indicating a position on the screen 6 by a user who uses the screen 6 as a blackboard, and an infrared diode 8 provided at the tip of the pointing rod 7 are illustrated.

The projector 11 receives the infrared light reflected by the infrared reflection layer 4a and converts the infrared light into an electric signal. And a coordinate detection circuit 10 for changing luminance or color and feeding back detected position information to a personal computer.

Next, an operation example of the projector according to the embodiment of the present invention will be described. The liquid crystal panel 3 displays an image based on the input image signal. Light from the light source 1 is converted into a light image by visible light by passing through the liquid crystal panel 3 after infrared rays are removed by the filter 2. This optical image is projected on a screen 6 through a dichroic mirror 4 and a lens 5.

On the other hand, when the user points on the screen 6 with the tip of the pointing rod 7, the light from the infrared diode 8 is reflected by the infrared reflecting layer 4 a through the lens 5, and
The light is received by the dimensional CCD 9. The light received by the two-dimensional CCD 9 is photoelectrically converted and converted into an electric signal by the coordinate detection circuit 1.
0, the coordinate detection circuit 10 detects the light receiving position (coordinate) on the two-dimensional CCD 9 based on the electric signal.
If the resolution and size of the two-dimensional CCD 9 and the liquid crystal panel 3 are equal, the coordinate detection circuit 10 can detect which pixel on the liquid crystal panel 3 the infrared diode 8 is pointing. Then, the coordinate detection circuit 10 changes the brightness or the color of the pixel at a position corresponding to the position detected on the liquid crystal panel 3. Therefore, the brightness or color of the corresponding pixel of the projected image on the screen 6 changes. The coordinate detection circuit 10 sends the detected position information to a personal computer.

Therefore, when the user moves the pointing rod 7, the brightness or color of the pixel on the projected image immediately changes along the movement trajectory of the infrared diode 8, so that the image from the liquid crystal panel 3 is displayed on the screen 6. The user can write a picture or a character repeatedly.

Further, by feeding back the detected position information to the personal computer, it is possible to control the mouse cursor of the personal computer.

In the present embodiment, the brightness or the color of the detected pixel is changed, but other processing may be applied to the detected pixel.

Although a liquid crystal panel is used as a display means for obtaining a light image, other lattice light valves for projection may be used.

The horizontal resolution of the CCD as the photoelectric conversion means may be an integral multiple of the horizontal resolution of the display means, and the vertical resolution of the CCD may be an integral multiple of the vertical resolution of the display means.

Also, the light receiving area of the CCD and the light receiving area of the display means may be the same, and the shapes of both may be similar.

Further, the size of the pixel of the CCD and the size of the pixel of the display means may be 1: 1 or 1: 3 or 3: 1.

The electrical processing in the above operation is performed by CP
U or a computer system such as a personal computer using a memory. The memory in that case is
The storage medium according to the present invention is configured. In this storage medium, processing for displaying an input image signal on the liquid crystal panel 3
A process of receiving infrared rays by a photoelectric conversion means such as a dimensional CCD 9 and converting the infrared rays into an electric signal; a process of detecting a light receiving position from the electric signal; A program for executing the process to be changed is stored. Therefore, C
The object of the present invention can be achieved by the PU executing the above program.

The storage medium may be an optical disk, a magneto-optical disk, a semiconductor memory, a magnetic recording medium, or the like.

[0028]

As is apparent from the above description, according to the image display device and the recording medium in which the program is recorded according to the present invention, an electronic blackboard projector having both functions of a conventional projector and an electronic blackboard can be realized. . In this case, since position detection can be performed inside the projector, a special screen with a built-in position detection device as in the past is not required, and a normal screen can be used, realizing an inexpensive device with a simple system configuration. can do.

According to the image display device of the present invention and the recording medium on which the program is recorded, for example, a liquid crystal panel,
Filter, light source, dichroic mirror, 2D CCD
A simple configuration can be obtained by using such a method.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an electronic blackboard projector according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light source 2 Filter 3 Liquid crystal panel 4 Dichroic mirror 4a Infrared reflective layer 5 Lens 6 Screen 7 Pointing rod 8 Infrared diode 9 Two-dimensional CCD 10 Coordinate detection circuit 11 Projector

Claims (9)

[Claims] A display means for displaying an input image signal as a light image; a projection means for projecting the light image displayed by the display means on a screen; and a light emitting means moving on the screen. Light detection means for detecting light of a predetermined wavelength; photoelectric conversion means for receiving the light of the predetermined wavelength detected by the light detection means and converting the light into an electric signal; and the electric signal converted by the photoelectric conversion means Detection processing means for detecting information on the light-receiving position detected by the light detection means based on the light-receiving means, and processing a signal of a pixel corresponding to a position corresponding to the light-receiving position on the display means. Image display device. 2. The image display device according to claim 1, wherein said detection processing means changes the brightness or color of the signal of said pixel. 3. The display means includes: a light source; a filter for removing the light of the predetermined wavelength from the light of the light source; and a liquid crystal panel illuminated with the light from the filter. The image display device according to claim 1, wherein: 4. The projector according to claim 1, wherein the projection unit and the light detection unit include a dichroic mirror that transmits the light image, reflects the light of the predetermined wavelength from the light source, and causes the light to enter the photoelectric conversion unit. Claim 1.
The image display device as described in the above. 5. The image display device according to claim 1, wherein said photoelectric conversion means is constituted by a two-dimensional CCD. 6. The image display device according to claim 1, wherein the detection processing means outputs the detected position information. 7. A display process for displaying an input image signal as a light image, a light detection process for detecting light of a predetermined wavelength from a light emitting means moving on a screen, and the light detection process A photoelectric conversion process of receiving light of a predetermined wavelength and converting the received light into an electric signal; a light receiving position detection process of detecting the position of the received light based on the electric signal converted by the photoelectric conversion process; A recording medium on which a program for recording a program for executing a processing for processing a signal of a pixel at a position corresponding to the light receiving position detected by the light receiving position detection processing is recorded. 8. The recording medium according to claim 7, wherein the processing changes luminance or color of a signal of the pixel. 9. The recording medium according to claim 7, wherein a program for executing an output process of outputting the detected position information is recorded.