JPH0830211A - Indicator with widened angle of field - Google Patents

Abstract

PURPOSE:To provide the field angle widened indicator which is bright and has the wide angle of field even when an indicator for power supply, etc., is situated beyond a set front surface because of restrictions of the design of a flat panel display such as a plasma display(PDP). CONSTITUTION:The back surface 1b of a transparent cover 1 fitted in front of an LED 2 is formed in a wedgelike or quadrangular prism shape which is pointed toward the LED, and light diffusion processing is performed by texturing, printing, etc., for the front surface 1a of a transparent cover. The light emitted by the LED 2 is bent by the wedge or quadrangular prism to exit from the front surface cover 3, and then spreads only laterally or both laterally and longitudinally, so that the light does not travel in a slanting lateral direction which is not necessary so much. Consequently, the field angle widened indicator which is bright and has the wide angle of field is obtained. Its directional characteristics can be adjusted with the intensity of the light diffusion on the front surface 1a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a wide viewing angle indicator in the case where an indicator such as a power source is located deeper than the front surface of a set due to design restrictions of a flat panel display such as a plasma display (PDP).

[0002]

2. Description of the Related Art As a conventional indicator, an actual open 57
14186, it is roughly as shown in FIG. Here, 9 is an LED, 8 is a transparent cover, 3
Is a front panel, and 4 is an LED mounting base plate. The transparent cover 8 has a convex lens portion 8b, and the light emitted from the LED is once narrowed down here, and then exits through the window of the front panel 3 to widen and obtain a wide viewing angle. However, in such a configuration, since the light emitted from the transparent cover spreads isotropically, the intensity of the light is reduced by the square of the distance, and there is a problem that the light becomes dark when viewed from a distance. Further, since the convex lens portion 5b has a hemispherical shape, it is difficult to manufacture.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a wide viewing angle indicator which is easy to manufacture and does not become dark when viewed from a distance.

[0004]

The LED side of the transparent cover of the indicator is wedge-shaped or 4 toward the LED.
It is formed in a pyramid shape.

[0005]

[Function] The LED side of the transparent cover of the indicator is LE
Since the tip is formed in a wedge shape or a quadrangular pyramid shape toward D, the light emitted from the transparent cover is deviated in two directions or four directions, and by setting it in the direction viewed by a person,
Bright and wide viewing angle becomes possible.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A viewing angle widening indicator of an electric device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a conceptual view of a first embodiment according to the present invention, (A) is a top view, (B) is a rear view of a transparent cover, and (C) is a side view thereof. Here, 2 is an LED, 1 is a transparent cover, 3 is a front panel, and 4 is an LED mounting base plate. A back surface 1b of the transparent cover 1 is formed in a wedge shape having a tip toward the LED, and a ridgeline 1c at the tip is arranged in the vertical direction of the electric device.

Since the back surface 1b of the transparent cover 1 is desired to be formed in a wedge shape, the light emitted from the LED and passing through the transparent cover spreads out in a direction perpendicular to the ridge line of the tip of the wedge shape. Therefore, when the ridge line is arranged in the vertical direction of the device, the light spreads in the horizontal direction, the viewing angle spreads in the horizontal direction normally seen by humans, and it does not spread in the vertical direction which is not needed so much, and thus a bright viewing angle widening indicator is provided. Become. In this case, the directivity can be adjusted by subjecting the front surface 1a of the transparent cover 1 to light diffusion processing such as graining or printing.

FIG. 2 is a conceptual view of a second embodiment according to the present invention, (A) is a top view, (B) is a rear view of a transparent cover,
(C) is a side view of the transparent cover, and (D) and (E) are a rear view and a side view of a transparent cover having substantially the same shape as (B) and (C), respectively. Here, 2 is an LED, 5 is a transparent cover, 3 is a front panel, and 4 is an LED mounting base plate. Further, 6 is a transparent cover having substantially the same shape as 5. Both sides 5d of a wedge-shaped triangular side surface having a tip end facing the LED of the transparent cover 5 are cut obliquely with respect to the front panel 3. The transparent cover 6 has a wedge-shaped side end 6d.
Is cut into a triangle. The ridgeline 5c or 6c at the tip of the transparent cover 5 or 6 is arranged in the vertical direction of the electric device as in the first embodiment.

In this embodiment, L is the same as in the first embodiment.
The light from the ED spreads laterally by the wedge shape 5b and travels forward, but a part of it also spreads vertically by the triangularly cut surface 5d or 6d. In this case, most of the light goes to the horizontal direction that humans often see, and part of it also goes to the vertical direction, which is a little needed. It becomes a wide indicator. In this case, the directivity can be adjusted by subjecting the front surface 5a or 6a of the transparent cover 5 or 6 to a light diffusion process such as graining or printing.

FIG. 3 is a conceptual view of a third embodiment according to the present invention, (A) is a top view, (B) is a rear view of a transparent cover,
(C) is a side view of a transparent cover. Where 2 is LE
D and 7 are transparent covers, 3 is a front panel, and 4 is an LED mounting base plate. The back surface 7b of the transparent cover 7 is formed into a quadrangular pyramid having a tip facing the LED 2. The four sides of the quadrangular pyramid face the lateral and vertical directions of the electric device, respectively.

Since the back surface 7b of the transparent cover 7 is desired to have a quadrangular pyramid shape, the light emitted from the LED and passing through the transparent cover spreads laterally and vertically in the quadrangular pyramid and travels forward. Since less diagonal lateral light is required, the indicator becomes bright and has a wide viewing angle. In this case, the transparent cover 7
This directivity can be adjusted by subjecting the front surface 7a of the above to a light diffusion process such as graining or printing.

[0012]

[Effects of the Invention] Even when an indicator such as a power source is located deeper than the front surface of the set due to design restrictions of a flat panel display such as a plasma display (PDP), the LED side of the transparent cover of the indicator is directed toward the LED. Since it is formed into a wedge shape or a quadrangular pyramid shape, the light emitted from the transparent cover is biased in two directions or four directions and placed in a direction that a human can see, so that it is bright and has a wide viewing angle. A wide viewing angle indicator is obtained. Further, since this transparent cover has a flat surface, it can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a first embodiment.

FIG. 2 is a conceptual diagram of a second embodiment.

FIG. 3 is a conceptual diagram of a third embodiment.

FIG. 4 is a conceptual diagram of a conventional example.

[Explanation of symbols]

 1 transparent cover 2 LED 3 front cover 4 LED mounting base plate 5 transparent cover 6 transparent cover 7 transparent cover 8 transparent cover 9 LED

Claims (6)

[Claims] 1. An indicator device comprising an LED arranged behind a front panel of an electric device and a transparent cover attached to a window of the panel opened in front of the LED, wherein the transparent cover faces the ELD. Wide viewing angle indicator with a wedge-shaped tip. 2. An indicator device comprising an LED arranged behind a front panel of an electric device and a transparent cover attached to a window of the panel opened in front of the LED, wherein the transparent cover faces the ELD. The viewing angle widening indicator is characterized in that the tip is formed in a wedge shape, and the ridgeline of the wedge-shaped tip is arranged in the vertical direction. 3. An indicator device comprising an LED arranged behind a front panel of an electric device and a transparent cover attached to a window of the panel opened in front of the LED, wherein the transparent cover faces the ELD. The viewing angle widening indicator is characterized in that the tip is formed in a wedge shape, and both side surfaces of the wedge shape triangle are obliquely cut. 4. An indicator device comprising an LED arranged behind a front panel of an electric device and a transparent cover attached to a window of the panel opened in front of the LED, wherein the transparent cover faces the ELD. Wide viewing angle indicator characterized by forming the tip into a quadrangular pyramid. 5. An indicator device comprising an LED arranged behind a front panel of an electric device and a transparent cover attached to a window of the panel opened in front of the LED, wherein the transparent cover faces the ELD. A wide viewing angle indicator characterized in that the tip is formed in a wedge shape and a light diffusing portion is provided on the opposite surface of the transparent body cover. 6. An indicator device comprising an LED arranged behind a front panel of an electric device and a transparent cover attached to a window of the panel opened in front of the LED, wherein the transparent cover faces the ELD. A wide viewing angle indicator characterized in that the tip is formed into a quadrangular pyramid and a light diffusing portion is provided on the opposite surface of the transparent body cover.