JP5267974B2 - Illumination structure and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out illumination toward an upper surface and a side surface on the same housing by using one light source. <P>SOLUTION: This illumination structure is provided with: a light source 7 arranged in a housing; a first illumination part 11 arranged on the upper surface of the housing, and carrying out illumination toward the upper side; a second illumination part 21 arranged on the upper surface of the housing, and carrying out illumination toward the side; a first light guide part 10 guiding the light of the light source 7 to the first illumination part 11; and a second light guide part 20 guiding the light of the light source 7 to the second illumination part 21 through the first light guide part 11. The first illumination part 11 is molded integrally with the first light guide part 10, and the second illumination part 21 is molded integrally with the second light guide part 20. A side surface of the second light guide part 20 facing the second illumination part 21 is formed into a tapered shape. The thickness of the second light guide part 20 between the bottom surface and the upper surface is formed to increase toward the front end. The light source 7 is arranged by being tilted at a predetermined angle with respect to the first light guide part 10. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an illumination structure that illuminates two places on a housing with the same light source, and an electronic apparatus including the illumination structure.

Patent Document 1 discloses a technology for emitting a part of irradiation light from a light source provided to illuminate a liquid crystal panel in an information terminal, and receiving and guiding the emitted light to illuminate a keyboard. It has been.
JP 2002-49439 A

  However, in Patent Document 1, although it is possible to illuminate the upper surface of the liquid crystal panel and the keyboard using one light source, the illumination is directed toward the upper surface and the side surface on the same housing using one light source. I couldn't make it.

  The subject of this invention is enabling it to illuminate toward the upper surface and side surface on a housing | casing using the same light source.

In order to solve the above-described problems, the invention described in claim 1 is a light source that is arranged inside the housing and emits light along the optical axis, and an upper surface of the housing that illuminates upward. A first illuminating unit; a second illuminating unit disposed on an upper surface of the housing for illuminating toward the side; and a plate-shaped first illuminating the light from the light source to the first illuminating unit. A light guide part and a plate-like second light guide part separate from the first light guide part for guiding the light of the light source to the second illumination part through the first light guide part The first illumination part is integrally formed with the first light guide part, and the second illumination part is integrally formed with the second light guide part, The light source is disposed with an optical axis inclined at a predetermined angle with respect to the first light guide unit, and a surface of the second light guide unit on the first light guide unit side is the first light guide unit. The second part of the optical part And wherein illuminating structure that is wider than the surface of the optical portion.

The invention described in claim 2 is the illumination structure according to claim 1, characterized in that a reflecting sheet on the bottom surface opposite to the first illuminating portion of the first light guide portion .

The invention according to claim 3 is the illumination structure of claim 1, wherein the second illuminating unit comprises a first inclined surface extending along one side of the upper surface of the second light guide section And the second inclined surface is formed on both sides of the bottom surface of the second light guide portion facing the second illumination portion.

A fourth aspect of the invention is the illumination structure according to the third aspect of the invention, wherein the second inclined surface is mirror-finished.

A fifth aspect of the present invention is the illumination structure according to the third or fourth aspect , wherein a reflective sheet is provided on the bottom surface and the top surface of the second light guide section.

The invention described in claim 6 is the illumination structure according to any one of claims 1 to 5, increases toward the width of the second light guide section at the distal end of the second light guide section It is characterized by being formed to be thin .

The invention described in claim 7 is the illuminating structure according to any one of claims 3 6, wherein the second light guide section bottom surface and the thickness second light guide between the upper surface of the characterized by being formed as Uhodo thicker suited to the tip of the department.

The invention described in claim 8 is the illuminating structure according to any one of claims 1 to 7, receiving for receiving light from the first light guide portion of the second light guide section The surface is formed wider than the light emitting surface that emits light from the first light guide unit, and the first light guide unit has a surface on the light source side that extends along the emission surface of the light source, and one side surface is It is characterized by being formed in a substantially trapezoidal planar shape extending along the optical axis of the light source .

A ninth aspect of the present invention is characterized by an electronic apparatus including the illumination structure according to any one of the first to eighth aspects.
The invention according to claim 10 is a light source that is arranged inside the housing and emits light along an optical axis from an emission surface, and a first illumination unit that is arranged on the top surface of the housing and illuminates upward. A second illumination unit disposed on the upper surface of the housing and illuminating toward the side; a plate-shaped first light guide unit that guides light from the light source to the first illumination unit; A plate-like second light guide part separate from the first light guide part for guiding the light of the light source to the second illumination part through the first light guide part, The light source is arranged with an optical axis inclined at a predetermined angle with respect to the first light guide part, and the second light guide part is formed integrally with the second illumination part, The second light guide has a planar shape of a substantially right triangle with the first light guide side as a short side, and the thickness between the bottom surface and the top surface increases toward the tip. Is viewed from the side corresponding to the short side, a first inclined surface is formed at the upper end of the surface corresponding to the long side of the right triangle, and the first inclined surface is the second illumination unit. A second inclined surface is formed on both sides of the bottom surface, and the first light guide unit is integrally formed with the first illumination unit on the upper surface, and the light source side The light guide side has a substantially trapezoidal planar shape whose width is smaller than the width of the second light guide unit side, the light source side surface extends along the emission surface of the light source, and The long side surface extends along the optical axis of the light source, and the surface of the second light guide portion on the first light guide portion side is the second light guide portion of the second light guide portion. It is characterized by an electronic device that is formed wider than the surface on the light guide side.

  According to the present invention, the same light source can be used to illuminate favorably toward the upper surface and side surfaces on the housing.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment)
FIG. 1 shows a mobile phone as a configuration of an embodiment of an electronic apparatus to which the present invention is applied. An upper housing 1 and a lower housing 2 are coupled via a biaxial hinge portion 3. The biaxial hinge 3 can be opened and closed in the vertical direction and can be opened and closed in the horizontal direction.

  And the cover 4 of the biaxial hinge part 3 is integrally assembled | attached along the one side part of the upper housing | casing 1. FIG. In the illustrated example, the cover 4 is formed with an upper surface opening 5 by a logo at the lower end and a side opening 6 by a slit along the left side. The upper surface opening 5 by these logos and the side surface opening 6 by slits can be illuminated as shown in FIG.

  FIG. 2 shows an upper housing 1 and a cover 4. In the upper housing 1, an LED (Light Emitting Diode) 7 as a light source, an upper surface opening 5 and a side surface opening of the cover 4 are shown. 6 and the first light guide unit 10 for guiding the light of the LED 7 to the first light unit 11, and the LED 7. The second light guide unit 20 that guides the light to the second illumination unit 21 through the first light guide unit 11 is disposed.

  The LEDs 7 sequentially light and notify incoming lights in, for example, seven emission colors. As shown in an enlarged view in FIG. 3, the LEDs 7 emit light to the first light guide unit 10 and the second light guide unit 20. The shaft is disposed at a predetermined angle. As a result, light is applied obliquely to the slit-like elongated second illumination unit 21 to illuminate the tip.

  The first light guide unit 10 is, for example, a milky white one in which a light diffusing material is mixed into a transparent resin, and the first illumination unit 11 with a logo is integrally formed on the upper surface thereof, and the bottom surface reflects light. For this purpose, blasting is applied. The first light guide 10 is formed on the inclined surface 13 whose right side is parallel to the cover 4 on one side of the upper housing 1 and whose left side is parallel to the optical axis of the LED 7. ing. A flange 14 is formed in parallel on the parallel surface 12, and a flange 15 is also formed on the inclined surface 13. The flange 15 is formed in parallel with the flange 14.

  As described above, the first light guide unit 10 has, for example, the white reflective sheet 16 attached to the blasted bottom surface, and the upper surface including the flanges 14 and 15 except for the first illumination unit 11. For example, a white reflection sheet 17 is attached. The reflection efficiency is improved by the reflection sheets 16 and 17 on the bottom surface and the upper surface, and thus the light guide efficiency is increased.

  Next, the second light guide unit 20 is made of, for example, a transparent resin mixed with a light diffusing material and colored in accordance with the color of the upper housing 1. 21 is integrally formed. The second light guide portion 20 is formed on the parallel surface 22 along the side opening 6 by the slit of the cover 4 on the left side and the inclined surface 23 parallel on the optical axis of the LED 7 on the right side. .

  In this way, the side surface of the second light guide unit 20 facing the second illumination unit 21 is formed into a tapered shape by the inclined surface 23. Thereby, the light guide efficiency to the 2nd illumination part 21 is improved. Mounting bosses 24 and 25 are formed on the front and rear of the inclined surface 23.

  The second light guide 20 is formed such that the thickness between the bottom surface and the top surface gradually increases toward the tip. Specifically, the upper surface of the second light guide 20 is formed on an inclined surface 26 that gradually increases toward the tip. Thereby, the light guide efficiency to the front-end | tip of the 2nd illumination part 21 is improved.

  In the second light guide unit 20, the light receiving surface that receives light from the first light guide unit 10 is formed in a wider portion 27 than the light emitting surface that emits light from the first light guide unit 10. . Note that the wide portion 27 has the same thickness as the light emitting surface of the first light guide unit 10, but the lower surface side thereof is an inclined surface 28 that gradually falls downward. Thereby, the light guide efficiency into the 2nd light guide part 20 from the light-receiving surface which receives the light from the 1st light guide part 10 is improved.

  Further, as shown in FIG. 4, the second light guide unit 20 has an inclined surface 31 on the right side of the elongated second illumination unit 21 with an inclined surface in the upper left portion, and is continuous with the upper surface (inclined surface 27). ing. The second light guide 20 has inclined surfaces 32 and 33 on both the left and right sides of the bottom surface. The inclined surfaces 32 and 33 on both the left and right sides of the bottom surface are mirror-finished to reflect light. As a result, the reflection efficiency to the elongated second illumination part 21 by the inclined surface at the upper left is increased, and thus the light guide efficiency is increased.

  As described above, for example, the silver reflection sheet 34 is attached to the bottom surface including the inclined surface 28 of the second light guide unit 20, and the white reflection sheet 35 is also formed on the upper surface including the inclined surface 31. It is pasted. Reflection efficiency is increased by the reflection sheets 34 and 35 on the bottom surface and the top surface, and therefore the light guide efficiency is increased.

  As shown in FIG. 2A, the cellular phone having the above illumination structure has an upper surface opening with a logo at the lower end portion of the cover 4 of the biaxial hinge portion 3 along one side portion of the upper housing 1. The first illumination part 11 with the logo on the upper surface of the first light guide part 10 is located in the part 5, and the second light guide part 20 is located in the side opening 6 by a slit along the left side of the cover 4. An elongated second illuminating portion 21 is located on the upper left inclined surface.

  Then, when the LEDs 7 are sequentially turned on with light emission colors such as seven colors by the incoming call, the first illumination unit 11 with the logo on the upper surface emits light with the light passing through the first light guide unit 10. Therefore, as shown in FIG.1 (b), it light-emits from the upper surface opening part 5 by a logo.

  At the same time, the elongated second illuminating unit 21 with the inclined surface on the upper left side emits light with the light passing through the second light guiding unit 20 through the first light guiding unit 10. Therefore, as shown in FIG.1 (b), it light-emits from the side surface opening part 6 by a slit.

  FIG. 5 shows an optical path in the first light guide unit 10 and an optical path in the second light guide unit 20. As shown in the figure, light emitted from the LED 7 is generated in the first light guide unit 10. In addition to being reflected by the blasted bottom surface and the white reflecting sheet 16, it is also reflected by the white reflecting sheet 17 on the upper surface, and efficiently illuminates the first illuminating unit 11.

  The light emitted from the LED 7 is guided from the first light guide 10 to the second light guide 20, and in the second light guide 20, as shown in FIG. Reflected by the silver reflective sheet 34 on the bottom surface including the inclined surface 28 and also reflected by the white reflective sheet 35 on the upper surface including the inclined surface 31 on the back side of the second illumination unit 21, the second illumination is performed. The portion 21 is illuminated efficiently.

  Further, in the second light guide 20, as shown in FIG. 4, the light is reflected by the inclined surface 23 on the right side parallel to the optical axis of the LED 7, and the mirror processing on the left and right sides of the bottom is performed. The light is also reflected by the inclined surfaces 32 and 33, and illuminates the second illumination unit 21 more efficiently.

  As described above, according to the mobile phone including the illumination structure of the embodiment, the same LED 7 is used to pass the first light guide unit 10 toward the upper surface opening 5 by the logo on the upper surface of the cover 4 on the upper housing 1. The first illumination part 11 with the logo on the upper surface can be well illuminated, and the second light guide part 20 is passed through the second light guide part 20 toward the side opening 6 by the slit on the side of the cover 4. The elongated second illuminating part 21 by the surface can be illuminated well.

  Moreover, since the first illumination unit 11 is integrally molded with the first light guide unit 10 and the second illumination unit 21 is integrally molded with the second light guide unit 20, the molding is easy and the light guide This eliminates the gap between the light-emitting portion and the illumination portion, thereby contributing to improvement in light guide efficiency.

(Modification)
In the above embodiment, the mobile phone is used. However, the present invention is not limited to this, and all electronic devices having an illumination structure such as a camera, a PDA, a notebook computer, a wearable personal computer, a calculator, and an electronic dictionary. Can be used.
Further, the light guide part may be integrally formed as in the embodiment, instead of being a separate body.
Further, in the embodiment, the LED is used as the light source, but other appropriate light sources may be employed.
Moreover, the shape of the illumination part and the light guide part is arbitrary, and it is needless to say that other specific detailed structures can be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS The structure of one Embodiment of the electronic device to which this invention is applied is shown, the top view (a) which showed the time of a mobile telephone being extinguished, and the top view (b) which showed the time of lighting. It is the top view (a) and side view (b) which showed the upper housing | casing and cover of FIG. It is the top view (a) and side view (b) which showed the light source, the illumination part, and the light guide part in the cover of FIG. It is sectional drawing of the 2nd light guide part of FIG. It is the side view (a) which showed the optical path in the light guide part of FIG. 3, and the enlarged view (b) of the arrow B part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper housing | casing 2 Lower housing | casing 3 Biaxial hinge part 4 Cover 5 Upper surface opening part 6 Side surface opening part 7 Light source 10 1st light guide part 11 1st illumination part 12 Parallel surface 13 Inclined surface 14 庇 15 庇 16 Reflection Sheet 17 Reflective sheet 20 Second light guide portion 21 Second illumination portion 22 Parallel surface 23 Inclined surface 24 Mounting boss 25 Mounting boss 26 Inclining surface 27 Wide portion 28 Inclining surface 31 Inclining surface 32 Inclining surface 33 Inclining surface 34 Reflecting sheet 35 Reflective sheet

Claims (10)

A light source that is arranged inside the housing and emits light along the optical axis;
A first illumination unit disposed on the upper surface of the housing and illuminating upward;
A second illumination unit disposed on the upper surface of the housing and illuminating toward the side;
A plate-like first light guide part for guiding light of the light source to the first illumination part;
A plate-like second light guide part separate from the first light guide part for guiding the light of the light source to the second illumination part through the first light guide part,
The first illumination part is integrally formed with the first light guide part,
The second illumination part is formed integrally with the second light guide part,
The light source is disposed with an optical axis inclined at a predetermined angle with respect to the first light guide unit ,
The surface of the second light guide unit on the first light guide unit side is formed wider than the surface of the first light guide unit on the second light guide unit side. Illuminated structure to do.   2. The illumination structure according to claim 1, wherein a reflection sheet is provided on a bottom surface of the first light guide unit that faces the first illumination unit. The second illumination part is composed of a first inclined surface extending along one side of the upper surface of the second light guide part,
2. The illumination structure according to claim 1, wherein second inclined surfaces are formed on both side portions of the bottom surface of the second light guide unit facing the second illumination unit.   The illumination structure according to claim 3, wherein the second inclined surface is mirror-finished.   The illumination structure according to claim 3, wherein a reflection sheet is provided on the bottom surface and the top surface of the second light guide unit.   6. The illumination structure according to claim 1, wherein a width of the second light guide portion is formed so as to become narrower toward a tip of the second light guide portion.   7. The thickness between the bottom surface and the top surface of the second light guide unit is formed so as to increase toward the tip of the second light guide unit. Illuminated structure. Forming a light receiving surface for receiving light from the first light guide in the second light guide wider than a light emitting surface for emitting light from the first light guide;
The first light guide section is formed in a substantially trapezoidal planar shape with a surface on the light source side extending along an emission surface of the light source and one side surface extending along an optical axis of the light source. The illumination structure according to any one of claims 1 to 7.   An electronic apparatus comprising the illumination structure according to claim 1. A light source that is arranged inside the housing and emits light along the optical axis from the emission surface;
A first illumination unit disposed on the upper surface of the housing and illuminating upward;
A second illumination unit disposed on the upper surface of the housing and illuminating toward the side;
A plate-like first light guide part for guiding light of the light source to the first illumination part;
A plate-like second light guide part separate from the first light guide part for guiding the light of the light source to the second illumination part through the first light guide part,
The light source is disposed with an optical axis inclined at a predetermined angle with respect to the first light guide unit ,
The second light guide is
The second illumination part is integrally formed;
A plane shape of a substantially right triangle having a short side on the first light guide portion side;
It is formed so that the thickness between the bottom surface and the top surface becomes thicker toward the tip,
When the second light guide is viewed from the side corresponding to the short side, a first inclined surface is formed at the upper end of the surface corresponding to the long side of the right triangle, and the first inclined surface. Functions as the second illuminating portion, and a second inclined surface is formed on both sides of the bottom surface,
The first light guide unit is:
The first illumination part is integrally molded on the upper surface,
The light source side has a substantially trapezoidal planar shape that is smaller than the width of the second light guide unit,
A surface on the light source side extends along an emission surface of the light source;
The long side surface of the second light guide portion extends along the optical axis of the light source,
The surface of the second light guide unit on the first light guide unit side is formed wider than the surface of the first light guide unit on the second light guide unit side. Electronic equipment.