JPH07314982A - Display board - Google Patents

Abstract

PURPOSE:To prevent a recording part from being exposed to the mutual interference of a light emitted from the light sources of a deletion part which deletes information on a display sheet by light and a reading part which emits the light to an image on the display sheet and reads the image by providing a light shutoff part which shuts off mutual lights between the deletion part and the reading part. CONSTITUTION:This display board consists of a recording part 10 which emits a specific ultraviolet beam, a deletion part 11 which emits a visible light, and a reading part 12 which emits a natural light. The ultraviolet beam from the recording part 10 and the visible light from the deletion part 11 have respectively varying wavelength areas, and the natural light from the reading part 12 is a visible light. When performing a recording/deletion operation, and a reading operation simultaneously, the natural light from the reading part 12 deletes data in the recording part 10, or the ultraviolet beam from the recording part 10 or the visible light from the deletion part 11 records unnecessary data in or deletes it from information to be loaded into the reading part 12. Therefore, shutters A, B13, 14 are provided between the reading part 12 and the deletion part 11, so that the mutual interference of lights can be prevented from occurring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board for recording and displaying information, and more particularly to a display board for recording information using a material such as a photochromic compound capable of coloring / decoloring by light. It is a thing.

[0002]

2. Description of the Related Art In recent years, in a display board such as a whiteboard, an attempt has been made to use a material such as a photochromic compound capable of coloring / decoloring by light. This is for drawing on a display screen in which a photochromic compound is laminated on a board serving as a substrate, using a pen-type writing instrument capable of emitting ultraviolet rays. As a result, there has been considered a display board in which ink eraser is not scattered and clothes or the like are not soiled by what is written on the board as in the past.

[0003]

However, in the above-mentioned conventional display board, the ultraviolet rays used for coloring, the visible light used for decoloring, and the natural light used for reading the display content have different wavelength regions from each other. However, there is a problem in that the accuracy of recording, erasing, and reading deteriorates when the light of the light interferes.

In view of this point, an object of the present invention is to provide a display board in which lights for recording, erasing or reading do not interfere with each other.

[0005]

In order to solve the above problems, the present invention reads an image by erasing information on a display sheet by light and an image on the display sheet by irradiating the image with light. A light-shielding unit that blocks mutual light from the reading unit is provided.

[0006]

The present invention can prevent the mutual interference of the light emitted from the light sources of the recording section, the erasing section and the reading section by the above means.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a display board according to a first embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1
Is a perspective view of the display board in the first embodiment of the present invention,
2 is a cross-sectional view taken along the line AA ′ of FIG. 1, in which 1 is a display board, 3 is an outer case having an opening 2 in the front surface, 4
Is a back plate of the outer case 3, 5 is a leg portion that supports the outer case 3, 6 is a display sheet for writing information in the outer case 3, 7 is an intermediate panel that supports the display sheet 6, and 8 and 9 are display sheets A sheet transport roller for transporting 6 around the intermediate panel 7 in the direction of arrow N, 10 is a recording unit for recording information on the display sheet 6, and 11 is an erasing unit for erasing the information recorded on the display sheet 6. , 12 are reading units for taking in the information recorded on the display sheet 6, 1
3 and 14 are shutters A and B for preventing mutual interference of light
Is.

The display sheet 6 includes a material such as a photochromic material which exhibits a reversible color development / erasing reaction by light. Therefore, by irradiating the display sheet 6 with ultraviolet rays of a specific wavelength, information can be written in a specific color, and by irradiating visible light, the information once written can be erased.

The display board 1 of this embodiment has a recording section 10 which emits ultraviolet rays of a specific wavelength and an erasing section 11 which emits visible light.
And having a reading unit 12 that emits natural light, information is recorded on and erased from the display sheet 6 based on information input from the outside, and the information recorded on the display sheet 6 is read while irradiating natural light. .

In the display board 1 of the present embodiment constructed as described above, the display sheet 6 is transferred in the direction of arrow N by the sheet transfer rollers 8 and 9. At this time, the information recorded on the display sheet 6 is taken in by the reading unit 12, the previous information is erased by the erasing unit 11, the information externally input by the recording unit 10 is recorded, and then the opening 2 is reached. The desired information is displayed by being transferred.

However, the ultraviolet light of the recording unit 10 and the visible light of the erasing unit 11 have different wavelength regions, and the reading unit 1
Since the natural light 2 is visible light, when the recording / erasing operation and the reading operation are performed at the same time, the natural light of the reading unit 12 causes the erasing action in the recording unit 10, or the ultraviolet light or the erasing unit of the recording unit 10 is performed. There is a problem that the visible light 11 causes unnecessary recording or erasing of information to be taken in by the reading unit 12. Therefore, in the first embodiment of FIG. 2, the shutter A13 is provided between the reading unit 12 and the erasing unit 11 and the shutter B14 is provided between the erasing unit 11 and the recording unit 10 to prevent mutual light interference. it can. If a static eliminating material or a material having a cleaner effect is used for the shutter A13 and the shutter B14, it can be used as a countermeasure against static electricity or a stain on the display sheet 6.

In the second embodiment of the present invention shown in FIG. 3, the sheet meandering roller 1 for changing the transport direction of the display sheet 6 is shown.
The display board in which the display sheet 6 is meandered by 5, 16, 17, 18, 19, 20 is the shutter A1 as in the first embodiment.
3 and the shutter B14 are not provided. In this example, the display sheet 6 is meandered by the sheet meandering rollers 15, 16, 17, 18, 19, and 20, so that the reading section 12 and the erasing section 1 are provided.
1. A wall can be formed between the recording units 10 to prevent mutual interference of light. 21 and 22 are display sheets 6
And a back plate 4 of the outer case 3 to prevent abrasion of the seat surface due to friction. Further, in this example, the length of the display sheet 6 and the sheet meandering rollers 15, 16, 1
By adjusting the positions of 7, 18, 19, and 20, it is possible to have multiple screens of three screens or more. As described above, in the second embodiment, the reading portion 12 is formed by the meandering portion of the display sheet 6,
Since the space between the erasing section 11 and the recording section 10 can be shielded from light, there is no need to provide a special shutter as in the first embodiment.

[0013]

As is apparent from the above description, according to the present invention, it is possible to prevent mutual interference of light in the recording section, the erasing section, and the reading section, and to perform accurate recording / display and reading of display contents. Display board can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a display board according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a display board in the first embodiment.

FIG. 3 is a sectional view of a display board in the second embodiment.

[Explanation of symbols]

1 Display Board 2 Opening 3 Exterior Case 4 Back Plate 5 Leg 6 Display Sheet 7 Intermediate Panel 8, 9 Sheet Transfer Roller 10 Recording Section 11 Erasing Section 12 Reading Section 13 Shutter A 14 Shutter B 15, 16, 17, 18, 19,20 Sheet meandering roller 21,22 Sheet protector

Claims (2)

[Claims] 1. A casing having an opening, a display sheet having a composition containing a photochromic compound and having a display portion exposed at the opening, and a recording means for recording information on the display sheet by light. Reading means for reading an image recorded on the display sheet, sheet transfer means for moving the display part from the opening, the reading means, and mutual interference of light when recording and erasing the recorded image. A display board, comprising: 2. A writing sheet for writing by irradiating light and erasing a written image by irradiating light, an erasing unit for irradiating the writing sheet with erasing light, and a drawing sheet on the writing sheet. A reading unit that irradiates the formed image with light and reads the image by the reflected light; and a blocking unit that blocks the mutual light between the erasing unit and the reading unit. board.