JPH07219458A - Lecture support device - Google Patents

Abstract

PURPOSE:To magnify a display screen with a concave half-mirror for better visibility without enlarging a prompter. CONSTITUTION:A concave half-mirror 3 is arranged on the front of a prompter, a display device 1 is arranged below the concave half-mirror 3, and an image displayed on the display device 1 is projected on the concave half-mirror 3. The concave half-mirror 3 is formed with a flexible film on the half-mirror face, the face opposite to the half-mirror face and a box member airtightly connecting both faces is made of a rigid transparent material, and a means adjusting the air pressure in the box member is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lecture support device,
In particular, the present invention relates to a lecture support device in which a concave half mirror is arranged on the front surface, a display device is arranged below the concave half mirror, and an image displayed on the display device is projected on the concave half mirror.

[0002]

2. Description of the Related Art Conventionally, in order to give a long lecture or give an accurate speech, a lecturer often prepares a resume and talks while watching the lecture. However, in such a speech style, the eyes were lowered when reading the resume, the eye contact between the speaker and the audience was lost, and the intention of the speaker was often not clearly transmitted.

Therefore, in order to be able to see the resume without losing eye contact during the lecture, a display device is arranged upward on the lecture table or the like, and characters displayed on the display via a half mirror above the display device. A lecture support device (hereinafter referred to as "prompter") was developed, in which the optical path is converted into a hollow optical path.

When such a prompter is used, the lecturer 9 can display the display device 11 on the lecturer 14 as shown in FIG.
Half mirror 1 supported by columns 12 from above
Since it is possible to view the audience through 3 and read the information such as the characters displayed on the display device 11 reflected on the half mirror 13, for example, even when reporting a very fine number sequence, the audience is directed. I was able to accurately read the text as it was, so I was able to report without anxiety even if I could not tolerate an error in my statement at a general meeting of shareholders. Further, since nothing can be seen from the side of the audience, if the transparency of the half mirror 13 is increased and the layout is properly performed, it will be of no concern.

[0005]

However, although it is such a convenient prompter, due to its configuration, the display device 11 is viewed from a considerable distance, and it is difficult to see unless the displayed characters are enlarged. There was a problem.

Further, if the displayed characters are enlarged, the number of characters that can be displayed is naturally reduced, and if the number of characters is increased,
Since the size of the entire device will increase, the weight will inevitably increase.
It becomes difficult to install and move the device in the venue, and the existence of the device is an obstacle to the audience even though it is originally a device for watching resumes without the eyes of the audience. was there.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to enlarge a display screen with a concave half mirror without increasing the size of the device. It is to provide a technology that can make it easier to see.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[0009]

In order to achieve the above object, in the prompter of the present invention, a concave half mirror is arranged on the front surface, and a display device is arranged below the concave half mirror. The most important feature is that the displayed image is displayed on a concave half mirror.

In the concave half mirror, the half mirror surface is made of a flexible film, and a surface facing the half mirror surface and a box member for airtightly connecting both surfaces are made of a rigid transparent material. It is characterized by having means for adjusting the air pressure inside the box member.

[0011]

According to the above-mentioned means, the concave half mirror is arranged on the front surface, the display device is arranged below the concave half mirror, and the image displayed on the display device is imaged on the concave half mirror. , Despite the size of the device that the audience does not care about, the speaker can see a large projection as if using a large display.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

In all the drawings for explaining the embodiments, parts having the same function are designated by the same reference numerals, and the repeated description thereof will be omitted.

FIG. 1 is a schematic diagram showing a schematic configuration of an embodiment of a prompter according to the present invention, FIG. 2 is a diagram for explaining the operation of a concave half mirror of the present embodiment, 1 is a display device, Reference numeral 2 is a column extending upward from the display device 1, and its height is fixed or variable. Reference numeral 3 is a concave half mirror supported by a support 2. Reference numeral 4 is a personal computer (hereinafter referred to as a personal computer). Reference numeral 5 is a text floppy. Reference numeral 6 is a prompter software floppy. Reference numeral 7 is an electrical connection between the display device 1 and the personal computer 4. Is a dedicated cable, 8 is a connector, and 9 is a speaker.

The display device 1 is, for example, 10
The display unit 101 includes an inch active matrix drive liquid crystal display device or the like. This display device 1
Is basically the same as the display device of a personal computer, but since it is projected (moved) on a mirror to see an upright display,
It has the function of receiving display signals from a personal computer and displaying them in the opposite direction.

The personal computer 4 is related to the application program function, and is operated on the OS (MS-DOS, etc.) of the personal computer, like the other application programs such as word processors and spreadsheets, and the output thereof is a display device. No. 1 is displayed on the display unit 101.

In the prompter of this embodiment, the CRT back 401 is attached to the personal computer (notebook type) 4 so that the display signal of the personal computer 4 can be output, and this signal is used as the display signal of the prompter. Separately, the personal computer 4 and the prompter are connected by RS232C402.
This is so that the prompter itself can control keyboard input such as speed adjustment and page breaks.

The prompter of the present invention itself operates without the application software of this embodiment, and can display, for example, only one table or a word processing document.

FIG. 2 shows the appearance of a character or the like displayed on the display device 1 through the concave half mirror 3 above the display device 1 arranged upward, when the light path is changed to a hollow optical path. is there.

As shown in FIG. 2, when the focal length of the concave half mirror 3 is f and the distance between the concave half mirror 3 and the display device 1 is L, the optical magnifying power (Magnificatio)
n) When M is f> L,

[0021]

## EQU1 ## M = f / (f−L) is a point taught by geometric optics (reference: Optical Handbook). By the way, a plane mirror (shown by a broken line) is considered to be f = ∞ (infinity), and when this is substituted, M = 1.

It is well known that the image is hardly distorted when the light is transmitted, that is, the speaker 9 and the audience see each other through the concave half mirror 3 and the thickness is uniform even if it is concave. There is no problem because it is used for windshields of automobiles.

In the actual use of the prompter, the layout is different depending on the restrictions of the venue, the height and posture of the speaker 9, and the distance L is different. Therefore, it is necessary to change the focal length f depending on the case. It is rather difficult to use if the distance f is fixed.

3A and 3B are diagrams showing the detailed structure of the concave half mirror 3 of this embodiment. FIG. 3A is a plan view seen from a transparent film, and FIG. 3B is a plan view of FIG. FIG. 3C is a sectional view taken along line YY of FIG. 3A, and FIG. 3C is a sectional view taken along line XX. In FIG. 3, 301 is an airtight and transparent hollow box, which serves as a support frame for the concave half mirror 3 and corresponds to the side surface of the concave half mirror 3 when viewed from the Huff mirror surface. 302 is a flexible transparent film, and 303 is a valve.

As the flexible transparent film 302, for example, a stretchable film of polyethylene, vinyl chloride, butadiene or the like is used. The frame (outer shape) of the airtight and transparent hollow box 301 has a rectangular shape.
Although this shape is a square shape in FIG. 3, it is preferable to make it a rounded shape because a concave shape having excellent optical characteristics can be realized.

Therefore, in this embodiment, as shown in FIG.
Airtight and transparent hollow box 301 as shown in (B) and (C)
Is formed by a flexible transparent film 302, and this film is used as a half mirror. The valve 303 is provided in the portion 11A corresponding to the side surface of the hollow box 301 when viewed from the half mirror surface.
When a pressure difference between the inside and the outside is provided via the valve 303, the transparent film 302 bends due to the pressure difference, and a pseudo concave surface is formed, and the focal length of this concave surface becomes shorter as the pressure difference becomes larger.

The position of the bulb 303 is set to the concave half mirror 3.
By using the inside of the support column 2 as pressure piping to match the support column 2 that supports the speaker, the speaker size is the same as the conventional prompter, and the size of the device does not bother the audience. A large projection can be seen as if using a large display device 1.

Since the hollow box 301 is airtight, if the pressure is adjusted first, then the focal length f does not change, and therefore the mirrors having different curvatures are not replaced for adjustment. Further, since the curvature can be changed by adjusting the pressure, there is no problem even when the speakers 9 themselves use different pressures to sequentially use the pressure.

In this embodiment, when the internal pressure of the hollow box 301 is negative compared to the outside air, the transparent membrane 302 has a concave surface when viewed from the center of the hollow box 301, and the internal pressure is positive compared to the outside air. Then a convex surface is created. Looking at this convex surface from the back,
It can of course be used as a concave mirror, but even though it is a hollow box 301 made of a transparent plate, some surface reflection remains, so there is also an image reflected by a flat surface, so the speaker 9 has a concave surface. It is easier to use as it is.

As described above, the invention made by the present inventor is
Although the present invention has been specifically described based on the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the scope of the invention.

[0031]

As described above, according to the present invention, a speaker is as if using a large display, despite the device size being of no concern to the audience. You can see a large projection.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a schematic configuration of an embodiment of a prompter according to the present invention.

FIG. 2 is a diagram for explaining the operation of the concave half mirror of this embodiment.

FIG. 3 is a diagram showing a configuration of a concave half mirror of the present embodiment.

FIG. 4 is a diagram for explaining a general use of a conventional prompter.

[Explanation of symbols]

1, 11 ... Display device, 2, 12 ... Posts, 3 ... Concave half mirror, 4 ... Personal computer, 5 ... Text floppy,
6 ... Prompter software floppy disk, 7 ... Exclusive cable, 8 ... Connector, 9 ... Speaker, 13 ... Half mirror, 301 ... Hollow box, 302 ... Transparent film, 303 ... Valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Takahashi 1-1-6, Saiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. A lecture support characterized in that a concave half mirror is arranged on the front surface, a display device is arranged below the concave half mirror, and an image displayed on the display device is projected on the concave half mirror. apparatus. 2. The concave half mirror has a half mirror surface made of a flexible film, and a surface opposed to the half mirror surface and a box member hermetically connecting both surfaces are made of a rigid transparent material. The lecture support apparatus according to claim 1, further comprising means for adjusting an air pressure inside the box member.