JPH0566673U - Outdoor display - Google Patents

Abstract

(57) [Abstract] [Purpose] An object is to provide an outdoor display device capable of reducing irregular reflection of sunlight at the tip of a black eaves. In an outdoor display device having arc tubes 1 arranged in a matrix and having black eaves 2 projecting forward from the upper part of each arc tube 1, the lower surface of the tip of the black eaves 2 is chamfered 2A. It is characterized by

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a large-sized display device for outdoor use.

[0002]

[Prior Art]

 FIG. 2 is a sectional view of a screen in a conventional display device of this type disclosed in, for example, Japanese Patent Laid-Open No. 60-225881. In the figure, 1 is a luminous tube in which a matrix is arranged, 2 is a black canopy, 3 is direct light of the sun, 4a, 4b and 4c are diffusely reflected light.

This type of black eaves is required to have a complicated shape, mechanical strength and weather resistance, and to be lightweight and inexpensive. For this reason, engineering plastics such as polycarbonate are used as the material, but it is difficult to form them thinner than 1.5 mm to 2 mm.

[0004]

[Problems to be solved by the device]

 For this reason, the tip of the black eaves 2 has a thickness as shown in the drawing, and the direct light of the sun strikes the end face of the tip with a width, and diffuse reflection light 4a, 4b, 4c is generated. As a result, when the screen is viewed from the viewer, the brightness of the black level apparently rises, which causes deterioration of the screen contrast.

The present invention has been made to solve this problem, and an object of the present invention is to provide an outdoor display device capable of reducing reflection of solar light at the tip of the black eaves.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an outdoor display device having arc tubes arranged in a matrix and having black eaves protruding forward from the upper part of each arc tube. did.

[0007]

[Action]

 In the present invention, since the lower surface of the tip of the black eaves is chamfered, the sunlight hitting this tip is almost eliminated, and diffuse reflection is unlikely to occur at the tip.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the lower end of the black eaves 2 is chamfered 2A to have a blade shape in cross section.

Therefore, most of the sunlight 3 is not blocked by the tip of the black eaves 2 and reaches the upper surface of the black eaves 2. The sunlight 3 reaching the upper surface of the black eaves 2 is diffusely reflected here, but most of the irregularly reflected lights 4a, 4b, 4c are not reflected toward the viewer, so that the brightness of the black level is not likely to rise. Absent.

[0011]

[Effect of the device]

 As described above, since the sunlight reflected by the tip of the black eaves is almost eliminated in the present invention, it is possible to prevent the black level brightness from increasing due to diffused reflection at the tip, and to reduce the contrast. It is possible to obtain a good quality display screen.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a screen of a conventional outdoor display device.

[Explanation of symbols]

 1 arc tube 2 black eaves 2A black eaves chamfer

Claims (1)

[Scope of utility model registration request] 1. An outdoor display device having matrix-arranged arc tubes and having black eaves protruding forward from the top of each arc tube, wherein the lower surface of the tip of the black eaves is chamfered. Outdoor display device.