JPH0570985U - A shining white board where you can write letters - Google Patents

Abstract

(57) [Summary] [Purpose] To create a whiteboard that can be used at the same time as an overhead projector in a dimly lit lecture hall, where characters and pictures can be written and seen clearly. [Structure] A known polymer film (1) having a function of writing and erasing characters and images with a felt-tipped pen is attached to a milky white plastic plate (2) with an adhesive, and a light diffusion sheet (3) is provided on the back side thereof. A plastic plate (4) on which dot patterns of different sizes are printed is provided, and the side of the plastic plate with dot patterns is illuminated with a fluorescent lamp (6).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a white board capable of writing and erasing characters and pictures on the surface of the board. More specifically, it relates to a whiteboard in which the board itself shines brightly and the characters and pictures are very visible.

[0002]

[Prior Art]

 At various lectures, overhead projectors (hereinafter abbreviated as OHP) and slide projectors are used to assist in explanations, but it is often necessary to write letters and pictures at the same time. In those cases, it was traditionally written on a blackboard or whiteboard.

[0003]

[Problems to be solved by the device]

 The above solution had the following drawbacks. In other words, during OHP or slide projection, the room is dark, so it is difficult to see or write letters or pictures on the blackboard or whiteboard. Therefore, it was necessary for the attendants to turn on the lights in the room each time and then turn them off.

[0004]

[Means for solving the problem]

 The present invention has been made to fundamentally eliminate these drawbacks. An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a known polymer film (1) having a function of writing and erasing characters and images with a felt pen is opalescent with an adhesive. Attached to a plastic plate (2), on the back side of it, a light diffusion sheet (3) and a plastic plate with a different-sized pattern that has the function of emitting light of uniform intensity regardless of the distance from the light source (4) is provided, the fluorescent lamp (6) is arranged near the cross section of the dot-patterned plastic plate, and the light quantity modulator (7) and the light source switch (8) consisting of the variable light transmittance are arranged at the boundary. Set up.

[0005]

[Action]

 Turn on the whiteboard light source switch (8) configured as described above, illuminate the entire surface of the milky white plastic plate (2) to which the polymer film (1) is bonded, and then operate the light intensity modulator (7) to adjust the light intensity. Add or subtract, and write or erase letters or pictures on this shiny surface. There is no need to turn on / off the lights in the room as in the past.

[0006]

【Example】

 The present invention will be described based on the embodiment shown in FIGS. A well-known polymer film (1) having a function of writing and erasing characters and images with a felt-tipped pen is attached to a milky white plastic plate (2) with an adhesive, and a white or milky white light diffusion sheet ( 3) and a plastic plate (4) printed with dot patterns of different sizes that have the function of emitting light of uniform intensity regardless of the distance from the light source, and apply the reflection plate (5) to the back side. Place a fluorescent lamp (6) near the cross section of the dotted plastic plate and connect the lighting tube, condenser, ballast, etc. Further, a light quantity modulator (7) which is a light transmittance variable body and a light source switch (8) are provided between the fluorescent lamp and the dot-patterned plastic plate. Here, the variable light transmittance is a sheet or film having various levels of light transmittance in the range of 10 to 100%, and can be changed by a winding method or a rotation method using a motor or the like. The light transmittance can be adjusted. In FIG. 1 of the embodiment, a film-like light transmittance varying body is used, but it may be colored. For example, a multi-colored film is used to make it a roll-up type and the whiteboard of the present invention is displayed in color. You can also The amount of light may be adjusted by moving the curved light reflector (9) or by moving another curved body along the curved light reflector and moving it. Further, instead of the variable light transmittance, the light may be electrically controlled by an inverter system. In this case, a triac is used, but since light adjustment is performed using the rising edge of the waveform, noise is likely to occur, and a protection circuit is usually connected and used. As the light diffusing sheet, for example, a sheet having an uneven surface is often used, but it may be smooth as long as it diffuses light. In the whiteboard configured as described above, the light source switch (8) is turned on, the entire surface of the milky white plastic plate (2) to which the polymer film (1) is adhered is illuminated, and then the light intensity modulator (7) is operated to change the light intensity. After adjusting, write or erase letters or images on this shining surface before using. There is no need to turn on / off the lights in the room as in the past. Moreover, it can be used as a general whiteboard when the light is off. Further, a plastic white board containing an iron plate is used as the reflector (5), and the entire whiteboard of the present invention is rotated 180 degrees about the horizontal center line to replace the front and back sides, thereby attaching a magnetic plate and the like. There will be new ways to write letters. The whiteboard of the present invention can be used more conveniently by providing a stand for felt pens and erasers like an ordinary blackboard.

[0007]

[Effect of the device]

 Characters and pictures can be written and deleted. Since it has a structure in which a writable part and a shining part are added, it has good visibility from a distance in a dark place. Therefore, it is not necessary to turn on / off the electric lights in the room as in the past, which saves time. Even when used in a bright room, it is clearly visible because it has a light adjustment mechanism. Panel presentations have become popular in recent academic societies, but even in such cases, the presentation content can be enhanced by using it. Safe and easy to operate. No need for personnel because it is not necessary to turn on / off the light switch in the room. Moreover, it has many effects such as being able to use it as a general whiteboard when it is extinguished.

[Brief description of drawings]

FIG. 1 is a plan view of the present invention.

FIG. 2 is a perspective view of the present invention.

[Explanation of symbols]

 1 Polymer film 2 Milky-white plastic plate 3 Light diffusion sheet 4 Plastic plate with a printed dot pattern 5 Reflector plate 6 Fluorescent lamp 7 Light intensity modulator 8 Light source switch 9 Curved light reflector 10 Light intensity controller switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Ryuzo Iwai 4-5-8 Tanimachi, Chuo-ku, Osaka City Koyo Co., Ltd. Industry Co., Ltd.

Claims (4)

[Scope of utility model registration request] 1. A known polymer film (1) having a function of writing and erasing characters and images with a felt-tipped pen is attached to a milky white plastic plate (2) via an adhesive,
On its back side, a light diffusing sheet (3) and a plastic plate (4) on which dot patterns of different sizes having a function of emitting a uniform intensity regardless of the distance from a light source are printed are provided. A whiteboard in which a fluorescent lamp (6) is arranged near the cross section of the attached plastic plate, and a light quantity modulator (7) and a light source switch (8) are provided. 2. The whiteboard according to claim 1, wherein the light quantity modulator comprises a variable light transmittance body provided at a boundary between the dot-patterned plastic plate and the fluorescent lamp. 3. The whiteboard according to claim 1, wherein the light quantity modulator comprises a movable curved light reflector or a curved curved body along the movable curved light reflector. 4. The whiteboard according to claim 1, wherein the light quantity modulator is an inverter type dimmer.