JP3430477B2 - Lecture support device - Google Patents

Description

Description: 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 that arranges a concave half mirror on the front surface, arranges a display device below the concave half mirror, and projects an image displayed on the display device onto the concave half mirror. 2. Description of the Related Art Conventionally, in order to give a long lecture or an accurate speech, a speaker often prepares a resume and talks while watching it during a lecture or the like. However, in such a style of speech, the eyes were lowered when reading the resume, eye contact between the speaker and the audience was lost, and the intention of the speaker was often not clearly communicated. In order to be able to view the resume without losing eye contact during the lecture, a display device is arranged upward on a lecture table or the like, and characters and the like displayed on the display via a half mirror are placed above the display device. A lecture support device (hereinafter referred to as a prompter) has been developed in which the optical path is converted into a hollow optical path. [0004] When such a prompter is used, the speaker 9 can move the display device 11 on the lecture table 14 as shown in FIG.
Half mirror 1 supported by pillars 12 from above
The user can read information such as characters projected on the display device 11 reflected on the half mirror 13 while viewing the audience through the viewer 3. Therefore, for example, even when reporting a very precise digit sequence, the audience faces the audience. Because I was able to read out accurately while I was, I was able to report with confidence even if I couldn't tolerate mistakes at a general meeting of shareholders. Further, since nothing can be seen from the audience side, if the transmittance of the half mirror 13 is increased and the layout is properly performed, no problem is caused. [0005] However, although such a convenient prompter, due to its configuration, the display device 11 must be viewed from a considerable distance, and unless the characters to be displayed are enlarged, the display device 11 must be viewed. There was a problem that it became easier. Also, if the displayed characters are enlarged, the number of characters that can be displayed naturally decreases, and if the number of characters is to be increased,
Since the weight of the equipment is inevitably increased due to the increase in size of the entire equipment,
It is difficult to install and move the equipment at the venue, and even though it is originally a device for watching the resume without seeing it, the presence of the device is an obstacle to the audience was there. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a display screen having a concave half without increasing the size of the apparatus. An object of the present invention is to provide a technology that can be enlarged by a mirror to make it easier to see. The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings. [0009] The present invention relates to a display.
An airtight and transparent hollow box arranged on the device,
Means for adjusting the air pressure inside the box
The apparatus, wherein the hollow box is provided with the display device.
The opposing surface is a flexible flange that constitutes a concave half mirror.
And a display device.
The surface other than the opposing surface is made of a rigid transparent material . According to the above-mentioned means, on the display device
An airtight and transparent hollow box is arranged, and the disk of the hollow box is disposed.
The surface facing the play device constitutes a concave half mirror.
It is made of a flexible film, and the image displayed on the display device is projected onto the concave half mirror, so that the size of the device does not matter from the audience side. Nevertheless, speakers can see large projections as if using a large display. Embodiments of the present invention will be described below in detail with reference to the drawings. In all the drawings for describing the embodiments, those having the same functions are denoted by the same reference numerals, and their repeated description will be omitted. FIG. 1 is a schematic diagram showing a schematic configuration of one embodiment of a prompter according to the present invention, and FIG. 2 is a diagram for explaining the operation of a concave half mirror of the present embodiment. Reference numeral 2 denotes a column extending upward from the display device 1, and its height is fixed or variable. 3 is a concave half mirror supported by the column 2, 4 is a personal computer (hereinafter referred to as a personal computer), 5 is a text floppy, 6 is a prompter software floppy, 7 is an electrical connection between the display device 1 and the personal computer 4. Is a connector, 8 is a connector, and 9 is a speaker. The display device 1 has, for example, 10
The display unit 101 includes an inch-active matrix driven liquid crystal display device. This display device 1
Is basically the same as a personal computer display device, but because it is projected (moved) to a mirror to see an upright display,
It has a function to receive display signals from a personal computer and display them left and right. The personal computer 4 is related to an application program function. Like the other application programs such as a word processor and a spreadsheet, the personal computer 4 operates on an OS (MS-DOS or the like) of the personal computer and outputs the output to a display device. 1 is displayed on the display unit 101. In the prompter of this embodiment, a CRT back 401 is attached to a personal computer (note type) 4 so that a display signal of the personal computer 4 can be output, and this signal is used as a display signal of the prompter. Separately, the personal computer 4 and the prompter are connected by RS232C402.
This is to make it possible to control the keyboard input, such as speed adjustment and page break, with the prompter body. The prompter itself of the present invention operates without the application software of the present embodiment. For example, it is possible to display only one table or a word processing document. FIG. 2 shows how characters and the like displayed on the display device 1 are viewed through a concave half mirror 3 after the display device 1 is arranged upward and the optical path is changed to a hollow shape. 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 magnification (Magnificatio)
n) When M is f> L, it follows that geometrical optics teaches that: M = f / (f−L) (Reference: Optical Handbook). Incidentally, a plane mirror (indicated by a broken line) is considered to be f = ∞ (infinity), and substituting this results in M = 1. It is well known that light transmission, that is, the image is hardly distorted when the speaker 9 and the audience see each other through the concave half mirror 3 or the concave surface has a uniform thickness. There is no problem because it is used for automobile windshields. In the actual use of the prompter, the layout differs depending on the limitations of the venue, the height and posture of the speaker 9, and the distance L, so that the focal length f needs to be changed depending on the case. If the distance f is fixed, it is difficult to use. FIGS. 3A and 3B are diagrams showing the detailed configuration of the concave half mirror 3 of the present embodiment. FIG. 3A is a plan view as viewed from a transparent film, and FIG. 3B is a view of FIG. FIG. 3C is a cross-sectional view taken along line XX of FIG. 3A, taken along line XX. In FIG. 3, reference numeral 301 denotes an airtight and transparent hollow box which serves as a support frame of the concave half mirror 3 and corresponds to a side surface of the concave half mirror 3 when viewed from the half mirror surface. 302 is a flexible transparent film, and 303 is a bulb. As the flexible transparent film 302, a stretchable film such as polyethylene, vinyl chloride and butadiene is used. Further, the shape of the frame (outer shape) of the airtight and transparent hollow box 301 is square.
Although this shape is square in FIG. 3, it is preferable to have a round shape because a concave shape having excellent optical characteristics can be realized. Therefore, in this embodiment, FIG.
(B), airtight and transparent hollow box 301 as shown in (C)
Is formed of a flexible transparent film 302, and this film is used as a half mirror. A valve 303 is provided on a portion 11A corresponding to a side surface of the hollow box 301 when viewed from the half mirror surface.
When the pressure difference between the inside and the outside is provided through the valve 303, the transparent film 302 bends due to the pressure difference and forms a pseudo concave surface, and the focal length of the concave surface decreases as the pressure difference increases. The position of the valve 303 is changed to the concave half mirror 3
If it is matched with the supporting column 2 and the inside of the supporting column 2 is used as a pressure pipe, it is the same as the conventional prompter, and despite the size of the device, the audience does not care about the size It is possible to see a large projection as if a large display device 1 were used. Since the hollow box 301 is airtight, if the pressure is adjusted first, then the focal length f does not change. Therefore, there is no need to adjust the mirror by changing mirrors having different curvatures. In addition, since the curvature can be changed by adjusting the pressure, there is no problem even if the speakers 9 having different heights use one after another by changing the pressure by the speaker 9 itself. In this embodiment, assuming that the internal pressure of the hollow box 301 is negative compared to the outside air, the film surface of the transparent film 302 is concave 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 formed. Looking at this convex from behind,
Although it can be used as a concave mirror, of course, even though the hollow box 301 is made of a transparent plate, a slight surface reflection remains, and there is a reflection image due to a flat surface. It is easier to see when using it. As described above, the invention made by the present inventor is:
Although the present invention has been described in detail with reference to the embodiment, the present invention is not limited to the embodiment, and it is needless to say that various changes can be made without departing from the scope of the invention. As described above, according to the present invention, the speaker can use a large display despite the fact that the size of the apparatus is not bothered by the audience. You can see a large projection as well.

BRIEF DESCRIPTION OF THE 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 the present embodiment. FIG. 3 is a diagram illustrating a configuration of a concave half mirror according to the present embodiment. FIG. 4 is a diagram for explaining a general use of a conventional prompter. [Description of Signs] 1,11: display device, 2, 12: support column, 3: concave half mirror, 4: personal computer, 5: text floppy,
6: prompter software floppy, 7: dedicated 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 Nippon Telegraph and Telephone Corporation, 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo (56) References JP-A-1-147421 (JP, A) JP-A Sho 64-44912 (JP, A) JP-A-7-104233 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09F 9/00 G02B 5/00-5/136 G02B 27 / 02 A47B 19/00

Claims (1)

(57) [Claim 1] An airtight device arranged on a display device
A transparent hollow box, and means for adjusting the air pressure inside the hollow box.
A lecture support device, wherein the hollow box has a surface facing the display device,
It is composed of a flexible film that constitutes a concave half mirror.
Other than the surface facing the display device
The lecture support device, characterized in that the surface is made of a rigid transparent material .