JPS6073665A - External light shielding apparatus for electrooptic display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an external light shading device for electronic display, which blocks external light entering an electronic device installed in an outdoor facility such as a stadium, and improves the contrast of the display surface. The present invention also relates to an external light shielding device that increases the viewing angle in the horizontal direction of the display.

In general, this type of electronic display device uses a light bulb, a cathode ray tube, a fluorescent lamp, etc. as a light emitting body. However, when the display surface is formed only from these light emitters, the contrast deteriorates when exposed to direct sunlight during the day, making it difficult to confirm the display. For this reason, it has been proposed, for example, as seen in Japanese Utility Model Publication No. 57-39847, that a light shield having a large number of horizontal grid plates is provided in front of a display lamp.

It has been confirmed that this type of lamp has good contrast because the lattice plate blocks direct sunlight that enters from above the lamp. However, since the horizontal lattice plate is formed into an elongated flat plate, the viewing angle in the left and right direction is narrow because it is limited around the horizontal lattice plate, and the visibility angle is approximately 100'～
12o0, and in a large stadium or the like, there is a risk that it will not be visible if it is removed from the front of the display device, so there is a demand for something that can be seen from a wide range.

The present invention has been made in consideration of the above-mentioned circumstances, and provides an external light shielding device for electronic displays that can widen the viewing angle in the left and right directions without impairing the external light shielding effect, and make the display visible from a wide range. The purpose is to provide equipment.

The present invention is characterized in that a plurality of louver pieces arranged horizontally in the left-right direction in front of the light-emitting body are formed of arc-shaped plates.

The details of the invention will be explained below with reference to the illustrated embodiments.

Reference numeral 1 denotes a light-emitting body, and the light-emitting body 1 is made of, for example, a T-shaped pulp light bulb, and its front surface is formed into a light-emitting display section 2. Reference numeral 3 denotes a cylindrical container having a light projection opening 4 on the front surface, and this container 3 is attached to a display device (not shown). Then, the light emitting body 1 is housed in the container 1 with the light emitting display section 2 positioned on the light emitting opening 4 side. 5 is a louver, and this louver 5 is a container 3
An annular frame portion 6 having an inner surface that is flush with the inner peripheral surface of
The frame portion 6 is formed with a plurality of louver pieces 7 spaced apart from each other in the vertical direction and horizontally in the left and right direction.

These louver pieces 7 are formed of arc-shaped plates. That is, the front edge part 8 and the rear edge part 9 are each formed into an arcuate surface, and the louver piece 7a located in the middle part
The louver pieces 7b+7c+7d+7e located in the vertical direction are arranged so that their protruding lengths are made longer and the protruding lengths of the louver pieces 7b+7c+7d+7e are sequentially made shorter. This is done by forming each louver piece 7 with a different radius of curvature, with the louver piece 7a having a large radius of curvature located in the middle, and the louver piece 7b having a smaller radius of curvature,
7c... may be provided. Further, in this embodiment, one louver piece 7b' is provided on the lower side. and,
Louver pieces 7b+7c+7 arranged in the upper half of the louver 5
cL7e is approximately 45 degrees at a light shielding angle θ formed by a line A connecting the front edge 8 of the upper louver piece and the rear edge 9 of the adjacent lower louver piece and a line B extending horizontally forward. It is formed to be. 10 is a connection terminal.

Next, the operation of this embodiment will be explained.

Since the light shielding angle θ at which the light emitter 1 is shielded from light by the louver 5 is approximately 45°, direct sunlight from entering the light emitter 1 is blocked, resulting in good contrast. Since the louver piece 7 of the louver 5 is formed in an arc shape, the light emitting display part 2 of the light emitter 1 is projected outward from the light emitting opening 4 of the container 3, and the viewing angle ψ in the left and right direction is The angle is approximately 220°, and it is possible to view the angle from a position close to the direct product of the display surface of the display device. Moreover, since the light-emitting display section 2 of the light-emitting body 1 is projected forward from the light projection opening 4 of the container 3, the light output is increased and the display surface becomes brighter, making it easier to see.

Although the present invention has been described above in detail based on the illustrated embodiments, the present invention allows various embodiments. For example, the light emitter may be a cathode ray tube, a fluorescent lamp, or the like. Further, the container may not be provided; for example, a light emitting body may be provided on a partition wall provided in the display device, and a louver 5 may be provided in front of the partition wall.

As described in detail above, in the present invention, a plurality of louver pieces are arranged horizontally horizontally in front of the light emitting body and are formed of arc-shaped plates, so that external light is effectively blocked and the display surface is The viewing angle can be widened without impairing the contrast ratio in the display, the display can be clearly viewed from a wide range, and the display effect can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the louver attached to the container, FIG. 2 is an enlarged front view, FIG. 3 is an enlarged plan view, and FIG. 4 is an enlarged view of the main parts. FIG. 5 is a plan sectional view of the main part. 1... Light-emitting body 2... Light-emitting display section 509. Louva 710. Louva Cantilever Permit Applicant Toshiba Electric Materials Co., Ltd. Agent Patent Attorney Ono 1) Engraving of Hiroshi Yoshi drawing (no change in content) 20 Title of the invention: External light shading device for electric display 3, Relationship with the person making the amendment Patent applicant: Toshiba RC Da〉7, 1-4-28 Mita, Minato-ku, Tokyo (375) Toshiba Electric Materials Co., Ltd. Company Satrata Representative: Dairoku Sato 4, Agent Address: 5, Toshiba Electric Materials Corporation Horiyomachi Plant, 72 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture 210, application subject to amendment, specification and drawings 6, amendment Contents (1) Correct the application form as shown in the attached sheet (engraving, no changes to the contents). (2) Correct the entire text of the specification as shown in the attached sheet (engraving, change in content = 494-

Claims (2)

[Claims] (1) It consists of a plurality of louver pieces arranged in front of the light emitting body, spaced apart from each other in the vertical direction, and arranged side by side with the left and right sides horizontal, and these louver pieces arranged in parallel are arc-shaped plates. 1. An external light shading device for electric display, characterized in that: (2) The louver pieces arranged in parallel are arranged such that the louver pieces located in the middle part have a longer outward protrusion length, and the louver pieces located in the vertical direction have their protrusion lengths sequentially shorter. An external light shielding device for electronic display according to claim (1), characterized in that: