JPH07152489A - Display device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a protective layer such as glass on the substantial display layer at the display position such as liquid crystal and CRT.
This is to prevent a parallax that occurs because the position is actually far behind the position that can be specified with a pen or the like for indicating the coordinates, and to try to bring the visible position and the position specified with the pen or the like closer to each other. [Structure] A plurality of light guides 2 as protective layers are two-dimensionally arranged in contact with the surface of a light-emitting body 3 to each other.
In the issuer 3, the light emitting portion 5 causes the cathode ray 4 to emit light. Then, the light emitted from the light emitting portion 5 travels in the light guide 2 in a substantially vertical direction like the light 6, and does not leak to the other parts, and the surface of the light guide 2 appears to be shining. [Effect] In the display device in which the light guide is arranged on the surface as a protective layer, the visible display part is transferred to the surface of the light guide, so that it looks as if the surface shines or changes the reflective / transmissive state. There is an effect that there is no parallax between the display position and the visual display position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a display device suitable for use as a coordinate input device used for a character input unit of a word processor, a coordinate input unit such as a personal computer and a CAD terminal, a handwritten character input unit for slips of a bank terminal and the like. Regarding

[0002]

2. Description of the Related Art As a device having a conventional coordinate input function, a display device or a character input device in which a liquid crystal and a coordinate input tablet are combined and integrated has been commercialized. Is inside thick glass for the purpose of protecting the surface, and from a viewpoint of viewing this obliquely, a shift occurs due to parallax between the designated coordinate position and the visible display position. For this reason, the user is inconvenient to use the correction in his / her mind to give an instruction. Incidentally, as a device related to this type of device, there are JP-A-58-96337, JP-A-60-178526,
JP-A-60-245028, JP-A-61-82223
The gazette etc. are mentioned.

[0003]

In the conventional device, a shift due to parallax occurs between the display position and the tip of the pen or the like which indicates the coordinate position.

An object of the present invention is that a protective layer such as glass is required on the substantial display layer at the display position of liquid crystal, CRT, etc., so that it is actually deeper than the position where it can be pointed by a pen or the like for pointing the coordinates. It is displayed and prevents parallax that occurs due to
The aim is to bring the visible position closer to the position designated by a pen or the like.

[0005]

The above-mentioned object is to prevent the light emitted from the actual display surface from advancing in the direction of the light causing the parallax, that is, in a direction other than the direction perpendicular to the display surface, and to set the coordinate position. This is achieved by guiding the light to the pointing section that points.

[0006]

In order to achieve the present invention, a large number of light guides are two-dimensionally arranged on the surface of the display layer in order to prevent the light emitted from the original display section from traveling in a direction other than the direction perpendicular to the display surface. Since the light emitted from the display layer is guided to a desired position by the light guide, the actual display surface can be moved to the surface of the light guide. As a result, the position where the surface of the light guide is designated as the pointing portion and the displayed position match, so that it is possible to obtain an easy-to-use display device without parallax.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the display device of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which a light guide according to the present invention is arranged on the surface of a CRT.

A plurality of light guides 2 are arranged on the surface of the light emitter 3. The light of the light emitting portion 5 emitted by the cathode ray 4 travels through the light guide 2 and appears to shine on the surface of the light guide 2.

For example, suppose that the light emitting portion 5 located immediately below the portion designated by the coordinate designating portion 1 of the light emitting body 3 is caused to emit light by the cathode ray 4. The light emitted from the light emitting portion 5 travels in the light guide 2 in a substantially vertical direction like the light 6, and does not leak to the other. Therefore, as the display unit, the position of the surface of the light guide 2 designated by the coordinate designating unit appears to be shining, and the position of the light emitting unit 5 does not appear to shine.
That is, no parallax is generated.

FIG. 2 shows an example in which the light guide according to the present invention is arranged on the surface of the liquid crystal, and it is assumed that the display unit 8 is in the reflective state. At this time, the light from the outside travels like light 6,
Get out of the surface again. That is, it appears that reflection occurs on the surface, and the position of the display unit 8 has moved to the surface of the coordinate designating unit. On the contrary, when the display unit 9 is in the transmissive state, the light 7 from the outside passes through the display unit 9 and the light does not return to the surface. As shown in FIGS. 1 and 2, the light guide 2 has a plate-like structure in which short optical fibers are in contact with each other. Further, the size of the surface of the light guide 2 that contacts the display unit 8 and the size of the outer surface that does not contact the display unit 8 are substantially the same.

As described above, for a display device such as a CRT or an EL panel which emits light by itself, or a display device which displays by a reflective / transmissive state such as liquid crystal, the actual display surface is coordinated. It is possible to obtain a user-friendly display device that can be moved to the surface of the unit and has no parallax between the coordinate indicating portion and the display portion.

As the light guide according to the present invention, short optical fibers made of glass fibers, plastic fibers or the like are adhered to each other and arranged in a two-dimensional manner, or short metal thin tubes having a high reflectance are used. It is possible to use those that are adhered and arranged in a two-dimensional form.

[0014]

In the display device in which the light guide according to the present invention is arranged on the surface as a protective layer, the visible display portion is transferred to the surface of the light guide, so that the surface shines.
It has an effect of appearing to change the reflective / transmissive state and eliminating the parallax between the instructed position and the visually displayed position.

[Brief description of drawings]

FIG. 1 is an operation principle diagram in which the present invention is applied to a CRT display unit.

FIG. 2 is an operation principle diagram in which the present invention is applied to a liquid crystal display unit.

[Explanation of symbols]

1 ... Coordinate instruction unit 2 ... Light guide 3 ... Light emitter 4 ...
Cathode line 5 ... Light emitting portion 8 ... Display portion

Claims (5)

[Claims] 1. A display layer for displaying a display target such as characters, and a protective layer disposed on the display layer, wherein the protective layer is a two-dimensional structure in which a plurality of light guides for guiding light are in contact with each other. A display device, wherein the display devices are arranged in a pattern and arranged on the display layer, and the light to be displayed displayed on the display layer is guided by the plurality of light guides. 2. The display device according to claim 1, wherein the protective layer has a plate shape in which short optical fibers are in contact with each other and are arranged two-dimensionally. 3. The display device according to claim 1, wherein the protective layer has substantially the same size as the surface in contact with the display layer and the size of the outer surface not in contact with the display layer. 4. The display device according to claim 1, wherein the protective layer transmits the display target displayed on the display unit in a substantially vertical direction. 5. The display device according to claim 1, wherein the protective layer is arranged in contact with the surface of the display unit.