JPH0418859A - Display device - Google Patents

Abstract

PURPOSE:To control a display screen with a simple operation by permitting a pointing light beam detection means provided on a screen surface to detect a light beam from a pointing beam irradiation means and obtaining a selection signal. CONSTITUTION:A large screen pointing device is provided with a picture projection means 2 projecting the picture of a character and a graphic on the screen 1 surface and a picture control means 4 controlling projection pictures 5 and 6 being at least a part of the picture projection means 2 based on the selection signal. Furthermore, the pointing beam radiation means 3 and the pointing beam detection means 8 are provided on the screen 1 surface, and the pointing beam detection means 8 obtains the selection signal. Thus, the screen can easily be controlled by irradiating an appropriate position with the pointing light beam while the display screen is viewed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a display device that displays images such as characters and figures on a screen, and particularly to a display device that can control the display screen using pointing light.

(Prior Art) Conventionally, various types of display devices have been used to project images such as characters and surface shapes onto a screen.

Overhead projectors, slide projectors, etc.
It projects a real image from a film, etc.

Also known are devices that project videos or the output screen of a personal computer onto a large screen. These project electrical signals as images, and there are some that project directly onto the cathode ray tube surface, and others that connect the output to a transmissive liquid crystal display and project it as an image.Compared to those that use real images, Therefore, it is possible to provide images rich in variety.

These display devices are often used in various lectures and explanations, where a presenter progresses the talk while adding explanations to the screen or referring to the screen. As the story progresses, the screen advances, but you can also return to the previous screen. Such screen operations are performed by the presenter himself or someone who helps him, but if the presenter does it himself, it puts a heavy burden on the presenter, and if the person who helps him does it, it puts a heavy burden on the presenter. It was difficult to match the progress of the presentation with screen operations, which could result in the flow of the presentation being disrupted.

In addition, the display screen can be used not only to advance or return the screen, but also to enlarge a part of the screen, or when using the output screen of a personal computer, to press multiple screens at the same time, or to Although various operations such as scrolling are possible, it has been difficult to perform such multiple functions using operations on conventional display devices.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a display device that allows the presenter to control the display screen with simple operations. be.

Of course, this does not preclude an assistant or other person from controlling it.

(Means for Solving the Problems) The present invention provides a large-screen pointing device that includes an image projection means for projecting images such as characters and figures onto a screen surface, and at least a portion of the image projection means based on a selection signal. The apparatus is characterized in that it has an image control means for controlling a projected image, a pointing light irradiation means, and a pointing light detection means provided on the screen surface, and a selection signal is obtained by the pointing light detection means. .

The pointing light beam irradiation means can be adapted to irradiate a modulated light beam.

The pointing beam emitting means may be configured to generate a pick-up signal.

The pickup signal uses a light beam modulated differently from the pointing light beam, and the irradiation angle thereof can be made wide.

The pickup signal may be a signal different from a light beam, such as a wired or wireless electric signal or an ultrasonic signal.

(Function) The present invention projects images such as characters, figures, etc. onto a screen surface, and controls at least a portion of the projected images of the image projection means based on a selection signal. Since a selection signal is obtained by detecting the light beam with a pointing beam detection means provided on the screen surface, the screen can be controlled by irradiating the pointing beam at an appropriate position while looking at the display screen. It is something that can be done.

(Embodiment) FIG. 1 is a schematic configuration diagram for explaining an embodiment in which the present invention is applied to a full-surface projection type projection system. In the figure, 1 is a large screen, 2 is a projector, 3 is a pointer, and 4 is a control device. The projector 2 is a cathode ray tube type projector, and projects an image signal from the control device 4 onto the screen 1. The pointer 3 projects a light beam with good directionality, and uses, for example, a semiconductor laser as a light source.

The projected light beam is modulated to distinguish it from the background. Any suitable modulation method can be adopted, but in this embodiment, rool 11J or roololJ
Two types of continuous code modulation are performed, and two buttons are provided for selection. At the time of detection, two types of signals can be distinguished by detecting the 3-bit signal after 2 consecutive "o" bits. When either button is pressed, a corresponding coded beam of light is projected.

When the pointer is on, a light beam modulated by a continuous code of "1" or an unmodulated light beam is emitted. Of course, these modulation modes are just examples, and other modulation methods can also be adopted.

As shown in FIG. 2, photodiodes 8 are arranged over the entire surface of the screen 1. As shown in FIG. The photodiode 8 is preferably one that is sensitive only to a specific wavelength range that matches the wavelength of the laser beam of the pointer 3.
It can be placed directly on the screen surface, but it may also be placed behind a small hole made in the screen. Each photodiode 8 is arranged in a grid pattern, and the grid spacing is preferably smaller than the size of the spot 9 from the pointer 3. Visible light may be used in cases where a modulation method is adopted.

The operation will be explained. The image signal selected by the control device 4 is given to the projector 2 and projected onto the screen 1. Here, two screens, a first screen 5 and a second screen 6, are projected. 7 indicates a location where the pointing beam from the pointer 3 is irradiated. In this embodiment, multiple windows can be opened on the screen.

It is assumed that the first screen 5 is a menu screen that is open. On the menu screen 7, when the button is pressed when the point 7 on the screen pointed to by the pointer 3 matches the menu selection position, for example, the number display position, the above-mentioned m-variable signal is detected by the photodiode at the corresponding position. A selection signal is transmitted to the control device 4, and the signal output of the selected screen is sent to the projector 2 and displayed on the second screen 6. The buttons provided on the pointer 3 can be provided with appropriate functions, such as using one as a selection button and the other as a cancel button, or selecting the scrolling direction of the screen.

For each screen, selection marks for screen operations are displayed around the screen, and the pointing beam is The selection can be carried out.

Therefore, the presenter can speak while operating the screen using the pointer 3, and since the screen operation is easy, smooth progress is possible.

In the above-mentioned embodiments, screen operations using a personal computer have been described, but it is obvious that the invention can be similarly applied to cases using an overhead projector or a slide projector, with the exception of some operations such as screen division.

Further, the projected light beam from the pointer does not necessarily need to be modulated. However, when modulation is not applied, a selection signal is immediately generated by a light beam that is applied to the position indicated by the pointer in order to make the projection position easy to understand. Since malfunction cannot be avoided in this case, a pick-up signal may be generated from the pointer 3 separately from this light beam, and the detector may take in the pointing light beam from the pointer when the pick-up signal is generated. In this case, the pointer can always use an appropriate signal as a pick-up signal, such as not only a light beam but also a wireless or wired electric signal, an ultrasonic signal, etc., and it is sufficient to input it into the control device.

(Effects of the Invention) As is clear from the above description, according to the present invention, in a display device, the position of a point on the screen can be recognized in relation to the image information being projected, providing a large degree of freedom in screen operation. This has the effect of creating a more powerful presentation.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram for explaining one embodiment of the display device of the present invention, and FIG. 2 is an explanatory diagram of the screen in FIG. 1. 1...Large screen, 2...Projector, 3...
Pointer, 4...control device, 8...photodiode. Straw 1 diagram

Claims (1)

[Claims] an image projection means for projecting images such as characters and figures onto a screen surface; an image control means for controlling at least a part of the projected images of the image projection means based on a selection signal; a pointing light irradiation means; and the screen surface. 1. A display device comprising: a pointing beam detecting means provided in a display device, wherein a selection signal is obtained by the pointing beam detecting means.