JP2004014315A - Lighting plate for display by switching between two colors - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting plate which displays two colors by switching and has stable luminous intensity evenness of a light emitting surface by enlarging areas of reflecting surfaces or refracting surfaces which guide light from each light source to the light emitting surface. <P>SOLUTION: The refracting surface 1d is arranged an bottom surface of the lighting plate on the light emitting surface 6a side and the reflecting surface 1c is arranged on an upper surface of the lighting plate on an opposite side to the light emitting surface 6a, wherein light which is guided into the inside of the lighting plate 1 from the first light source 3 is reflected by the reflecting surface 1c and is guided to the light emitting surface 6a, and light which is guided into the inside of the lighting plate from the second light source 4 is refracted by the refracting surface 1d and is guided into the light emitting surface 6a. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a daylighting plate, and more particularly to a daylighting plate suitable for switching and displaying a plurality of colors.
[0002]
[Prior art]
FIG. 2 shows a conventional example of a daylighting plate in which light from different light sources is guided to the same light emitting surface to emit light by switching the light emitting surface between two colors. A red lamp 3 and a blue lamp 4 are fixed to a printed circuit board 2 shown in FIG. The light collecting plate 7 disposed between the panel 5 and the printed board 2 is provided with reflecting surfaces 7c and 7d inclined in different directions, and further provided with recesses 7a and 7b into which the red lamp 3 and the blue lamp 4 respectively enter. Is provided.
[0003]
The recess 7a refracts the light of the red lamp 3 in the direction of the reflecting surface 7c, and the reflecting surface 7c reflects the light of the red lamp 3 in the direction of the lens 6 fixed to the panel 5 to cause the light emitting surface 6a of the lens 6 to emit light. . The recess 7b refracts the light of the blue lamp 4 in the direction of the reflecting surface 7d, and the reflecting surface 7d reflects the light of the blue lamp 4 in the direction of the lens 6 fixed to the panel 5 to change the light emitting surface 6a of the lens 6. Flash. When the red lamp 3 emits light, the light emitting surface 6a emits red light, and when the blue lamp 4 emits light, the light emitting surface 6a emits blue light.
[0004]
[Problems to be solved by the invention]
In the above-mentioned conventional daylighting plate, since the reflecting surfaces 7c and 7b divided into two parts from the center of the upper part of the light emitting surface 6a guide the light of each light source to the light emitting surface 6a, the area of the reflecting surface 7c or 7b is reduced. There is a problem that the light emission of the light emitting surface 6a is so narrow that unevenness easily occurs.
[0005]
The present invention has been made in view of the above points, and an object of the present invention is to increase the area of a reflection surface or a refraction surface that guides the light of each light source to the light emission surface to thereby increase the light emission unevenness of the light emission surface. It is an object of the present invention to provide a daylighting plate for switching and displaying two colors in which the color hardly occurs.
[0006]
[Means for Solving the Problems]
The daylighting plate of the present invention for switching and displaying two colors is provided with a refracting surface on the lower surface on the light emitting surface side, a reflecting surface on the upper surface opposite to the light emitting surface, and was guided from the first light source into the daylighting plate. The light is reflected by the reflection surface and guided to the light emitting surface, and the light guided from the second light source to the inside of the lighting plate is refracted by the refraction surface and guided to the light emission surface. .
[0007]
Further, in the daylighting plate, a recess is provided on an upper surface of the daylighting plate to allow the first and second light sources to protrude.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
A lighting plate according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a daylighting plate according to an embodiment of the present invention. A red lamp 3 and a blue lamp 4 are fixed to a printed circuit board 2 shown in FIG. A reflecting surface 1c is formed on the upper surface of the daylighting plate 1 disposed between the panel 5 and the printed board 2, and a refracting surface 1d is formed on the lower surface. Further, on the upper surface of the lighting plate 1, there are provided recesses 1a and 1b into which the red lamp 3 and the blue lamp 4 respectively enter.
[0009]
The recess 1a refracts the light of the red lamp 3 in the direction of the reflecting surface 1c, and the reflecting surface 1c reflects the light of the red lamp 3 in the direction of the lens 6 fixed to the panel 5 to emit light from the light emitting surface 6a of the lens 6. . The recess 1b refracts the light of the blue lamp 4 in the direction of the refraction surface 1d, and the reflection surface 1d refracts the light of the blue lamp 4 in the direction of the lens 6 fixed to the panel 5 to change the light emission surface 6a of the lens 6. Flash. When the red lamp 3 emits light, the light emitting surface 6a emits red light, and when the blue lamp 4 emits light, the light emitting surface 6a emits blue light.
[0010]
Since the reflecting surface 1c and the refracting surface 1d are formed so as to widely cover the light emitting surface 6a, light is guided from a wide range to the light emitting surface 6a, and uneven light emission does not occur.
[0011]
Although the embodiment is configured as described above, the invention is not limited to this. For example, the reflection surface 1d and the refraction surface 1d are not limited to one plane, and may be formed of, for example, a curved surface or a plurality of planes.
[0012]
【The invention's effect】
According to the daylighting plate of the present invention for switching and displaying two colors, the reflecting surface and the refracting surface for guiding the two colors of light to the light emitting surface can be formed on a wide surface, so that the light is guided from a wide range to the light emitting surface to emit light. No unevenness occurs.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a daylighting plate according to an embodiment of the present invention.
FIG. 2 is a sectional view showing an example of a conventional daylighting plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Daylighting board, 1a, 1b recess, 1c reflection surface, 1d refraction surface 2 Printed circuit board 3 Red lamp 4 Blue lamp 5 Panel 6 Lens, 6a Light emission surface 7 Daylighting plate, 7a, 7b recess, 7c, 7d Reflection surface

Claims (2)

A refracting surface is provided on the lower surface on the light emitting surface side, and a reflective surface is provided on the upper surface opposite to the light emitting surface. Light guided from the first light source into the lighting plate is reflected by the reflective surface and guided to the light emitting surface. A light guide plate configured to switch between two colors so that light guided from the second light source into the light guide plate is refracted by the refraction surface and guided to the light emission surface. 2. The daylighting plate according to claim 1, wherein a recess is provided on an upper surface of the daylighting plate to allow the first and second light sources to protrude.

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