JP2011181221A - Lighting system and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system and electronic equipment excellent in in-plane uniformity of light emission intensity and in reproduction of color, achievable of various patterns, and appropriate for miniaturization and reduction in thickness. <P>SOLUTION: The lighting system includes: a light guide plate 20; a light source 22 provided in a side surface of the light guide plate 20; a prism 24 provided in a surface of the light guide plate 20 to reflect the light, which is emitted from the light source 22 and propagates inside of the light guide plate 20, to emit from the other surface of the light guide plate 20; a light guide plate 30 arranged on the other surface side of the light guide plate 20; a light source 32 provided in a side surface of the light guide plate 30; a prism 34 provided in a surface of the light guide plate 30 on the light guide plate 20 side thereof to reflect the light, which is emitted from the light source 32 and propagates inside of the light guide plate 30, to emit from the other surface of the light guide plate 30; and a lens sheet 40 arranged on the other surface side of the light guide plate 30. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lighting device and an electronic apparatus.

  In a small electronic device such as a mobile phone or a personal digital assistant (PDA), a lighting device that captures light as one of interfaces and generates various light emission patterns may be used.

  For example, by applying such a lighting device to a phone mounted on a mobile phone or a lighting device for notifying an incoming e-mail, in addition to the original function of notifying an incoming call, by illuminating a part of the exterior A decorative effect can also be exhibited.

  As a lighting device for a small electronic device, a lighting device of a light emitting diode (LED: Light Emitting Diode) is generally arranged so as to face the exterior direction of the electronic device.

JP 2004-111170 A Japanese Patent Laid-Open No. 2005-135843 JP-A-2005-243451 JP 2010-0334017 A

  However, in the above-described conventional lighting device, with the downsizing and thinning of electronic devices, the distribution of light emission intensity may become non-uniform or a desired color may not be reproduced by color separation. In addition, it has been difficult to realize complicated patterns such as pattern superposition.

  According to one aspect of the embodiment, the first light source that is provided on the side surface of the first light guide plate having a flat plate shape and the first light guide plate, and enters the light from the side surface into the first light guide plate. And is provided on one surface of the first light guide plate, reflects the light emitted from the first light source and propagates in the first light guide plate, and reflects the other light of the first light guide plate. A first prism that exits from the surface; a flat second light guide plate disposed on the other surface side of the first light guide plate; and a side surface of the second light guide plate, The second light source for entering the light into the second light guide plate, and provided on one surface of the second light guide plate on the first light guide plate side, emitted from the second light source A second prism that reflects the light propagating through the second light guide plate and emits it from the other surface of the second light guide plate; An illumination device that is disposed on the other surface side of the second light guide plate and has a lens sheet that once collects the light emitted from the first light guide plate and the second light guide plate and then diverges the light. Provided.

  According to another aspect of the embodiment, a flat plate-shaped first light guide plate and one side surface of the first light guide plate are provided, and light is transmitted from the one side surface into the first light guide plate. A first light source that is incident on the first light guide plate, a second light source that is provided on the other side surface of the first light guide plate, and that enters the light from the other side surface into the first light guide plate, and the first light source plate. A first light source is provided on one surface of the light guide plate, reflects the light emitted from the first light source and propagates through the first light guide plate, and is emitted from the other surface of the first light guide plate. And the first light guide plate that is provided on the one surface of the first light guide plate and reflects the light emitted from the second light source and propagating through the first light guide plate. A second prism that emerges from the other surface of the first light guide plate, and the second light guide plate disposed on the other surface side of the first light guide plate. Lighting apparatus is provided with a lens sheet for diverging emitted by said light is once condensed.

  According to still another aspect of the embodiment, the first light guide plate having a flat plate shape and a side surface of the first light guide plate are provided, and light is incident on the first light guide plate from the side surface. The first light source and the first light guide plate are provided on one surface of the first light source plate and reflect the light emitted from the first light source and propagating through the first light guide plate to reflect the first light guide. Provided on the side of the second light guide plate, a first prism that exits from the other surface of the light plate, a flat second light guide plate disposed on the other surface side of the first light guide plate A second light source for allowing light to enter the second light guide plate from the side surface, and the second light source provided on one surface of the second light guide plate on the first light guide plate side. The second light beam that is emitted from the second light guide plate and reflects the light propagating through the second light guide plate and is emitted from the other surface of the second light guide plate. And a lens sheet that is disposed on the other surface side of the second light guide plate, and once converges the light emitted from the first light guide plate and the second light guide plate, then diverges. There is provided an electronic apparatus that includes a lighting device and a control circuit that controls a light emission color or blinking timing of the first light source and the second light source.

  Further, according to still another aspect of the embodiment, the first light guide plate having a flat plate shape and one side surface of the first light guide plate are provided, and the first light guide plate is provided from the one side surface. A first light source for entering light, a second light source provided on the other side of the first light guide plate, and entering the light into the first light guide plate from the other side, and the first The light guide plate is provided on one surface of the first light guide plate, reflects the light emitted from the first light source and propagates through the first light guide plate, and is emitted from the other surface of the first light guide plate. The first light guide plate is provided on the one surface of the first light guide plate and reflects the light emitted from the second light source and propagating through the first light guide plate. A second prism that exits from the other surface of the optical plate; and the first prism that is disposed on the other surface side of the first light guide plate. An electronic device comprising: an illumination device having a lens sheet that once collects the light emitted from the light source and then diverges; and a control circuit that controls the emission color or blinking timing of the first light source and the second light source. Equipment is provided.

  According to the disclosed illumination device, there are provided an illumination device and an electronic apparatus that have high in-plane uniformity and color reproducibility of emission intensity, can realize various patterns, and are suitable for downsizing and thinning. be able to.

FIG. 1 is a perspective view showing the structure of the illumination device according to the first embodiment. FIG. 2 is a schematic cross-sectional view showing the structure of the illumination device according to the first embodiment. FIG. 3 is a diagram (part 1) illustrating the structure and function of the prism of the illumination device according to the first embodiment. FIG. 4 is a diagram (part 2) illustrating the structure and function of the prism of the illumination device according to the first embodiment. FIG. 5 is a diagram (part 3) illustrating the structure and function of the prism of the illumination device according to the first embodiment. FIG. 6 is a perspective view showing the structure of the lens sheet of the illumination device according to the first embodiment. FIG. 7 is a plan view (part 1) illustrating the structure and operation of the lighting apparatus according to the first embodiment. FIG. 8 is a plan view (part 2) illustrating the structure and operation of the lighting apparatus according to the first embodiment. FIG. 9 is a plan view (part 1) for explaining the structure and operation of the illumination apparatus according to the second embodiment. FIG. 10 is a plan view (part 2) for explaining the structure and operation of the illumination apparatus according to the second embodiment. FIG. 11 is a plan view (part 1) for explaining the structure and operation of the illumination apparatus according to the third embodiment. FIG. 12 is a plan view (part 2) for explaining the structure and operation of the illumination apparatus according to the third embodiment. FIG. 13 is a perspective view showing the structure of the illumination device according to the fourth embodiment. FIG. 14 is a plan view showing the structure of the illumination device according to the fourth embodiment. FIG. 15 is a diagram for explaining the operation of the prism of the illumination device according to the fourth embodiment. FIG. 16 is a plan view for explaining the structure and operation of the illumination apparatus according to the fourth embodiment. FIG. 17 is a plan view showing the structure of the illumination device according to the fifth embodiment. FIG. 18 is a diagram illustrating the structure and function of the prism of the illumination device according to the fifth embodiment. FIG. 19 is a plan view for explaining the structure and operation of the illumination apparatus according to the fifth embodiment. FIG. 20 is a plan view showing the structure of the illumination device according to the sixth embodiment. FIG. 21 is a plan view for explaining the structure and operation of the illumination apparatus according to the sixth embodiment. FIG. 22 is a perspective view (part 1) illustrating the structure and operation of an electronic device according to the seventh embodiment. FIG. 23 is a perspective view (part 2) illustrating the structure and operation of an electronic device according to the seventh embodiment.

[First Embodiment]
The illumination device according to the first embodiment will be described with reference to FIGS.

  FIG. 1 is a perspective view showing the structure of the illumination device according to the present embodiment. FIG. 2 is a schematic cross-sectional view illustrating the structure of the illumination device according to the present embodiment. 3 to 5 are diagrams illustrating the structure and function of the prism of the illumination device according to the present embodiment. FIG. 6 is a perspective view showing the structure of the lens sheet of the illumination device according to the present embodiment. 7 and 8 are diagrams for explaining the operation of the lighting apparatus according to the present embodiment.

  First, the structure of the illumination device according to the present embodiment will be described with reference to FIGS.

  As illustrated in FIG. 1, the illumination device 10 according to the present embodiment includes a light guide plate 20, a light guide plate 30 disposed on the light guide plate 20, and a lens sheet 40 disposed on the light guide plate 30. Yes.

  The light guide plates 20 and 30 have two opposing surfaces and a plurality of side surfaces. On one side surface of the light guide plate 20, a light emitting diode (LED) 22 is provided. Similarly, an LED 32 is provided on one side surface of the light guide plate 30. A control circuit 50 for controlling the light emission of the LEDs 22 and 32 is connected to the LEDs 22 and 32.

  The LED 22 is disposed so that the light emitting surface thereof faces one side surface of the light guide plate 20 so that emitted light is introduced into the light guide plate 20. Similarly, the LED 32 is arranged so that the light emitting surface thereof faces one side surface of the light guide plate 30 so that emitted light is introduced into the light guide plate 30. The LEDs 22 and 32 can be provided on arbitrary side surfaces of the light guide plates 20 and 30, respectively. In the example of FIG. 1, the LEDs 22 and 32 are provided on the side portions facing each other. However, for example, the LEDs 22 and 32 may be provided on the same side portion of the light guide plates 20 and 30.

  The LEDs 22 and 32 are not particularly limited, and may be single color LEDs or RGB integrated LEDs. In the present embodiment, an LED is described as an example of a typical light source, but the light source to be used is not limited to the LED. For example, a small lamp, an organic electroluminescence (EL) element, or the like may be used instead of the LED.

  A prism 24 is provided on the surface of the light guide plate 20 opposite to the side on which the lens sheet 40 is provided, as shown in FIG. The prism 24 is formed by a plurality of grooves 26 provided on the surface portion of the light guide plate 20. The plurality of grooves 26 are provided so that the ridge lines extend in a direction intersecting the propagation direction of the light emitted from the LED 22. For example, the several groove | channel 26 extended in the direction parallel to the side surface of the light-guide plate 20 in which LED22 of the light-guide plate 20 was provided is arrange | positioned.

  Similarly, a prism 34 is provided on the surface of the light guide plate 30 opposite to the side on which the lens sheet 40 is provided, as shown in FIG. The prism 34 is formed by a plurality of grooves 36 provided on the surface portion of the light guide plate 30. The plurality of grooves 36 are provided so that the ridge lines extend in a direction intersecting the propagation direction of the light emitted from the LED 32. For example, the several groove | channel 36 extended in the direction parallel to the side surface of the light-guide plate 30 in which LED32 of the light-guide plate 30 was provided is arrange | positioned.

  The groove 26 of the prism 24 reflects the light emitted from the LED 22 toward the surface of the lens sheet 40 and is emitted to the outside from the light guide plate 20. Is set. Similarly, the grooves 36 of the prism 34 are inclined surfaces on the LED 32 side with respect to the surface of the light guide plate 30 so that the light emitted from the LEDs 32 is reflected toward the surface of the lens sheet 40 and emitted to the outside from the light guide plate 30. The tilt angle is set.

  For example, as shown in FIG. 3, among the light rays that have propagated through the light guide plate 20 and entered the prism 24, light rays that satisfy the total reflection condition with respect to the inclined surface 26 a of the prism 24 (for example, light rays 28 a, indicated by solid lines in the figure). Is totally reflected by the slope 26a of the prism 24. Of the light totally reflected by the inclined surface 26a of the prism 24, the light incident on the surface of the light guide plate 20 at an angle larger than the total reflection critical angle and satisfying the total reflection condition is opposite to the prism 24 forming surface. The light is emitted from the front surface side. Of the light emitted from the surface side of the light guide plate 20, only the light incident on the human eye can be felt bright by the person and becomes effective light.

  On the other hand, a light ray that does not satisfy the total reflection condition with respect to the inclined surface 26a of the prism 24 (for example, the light ray 28b, represented by a dotted line in the figure) is transmitted through the inclined surface 26a of the prism 24, and the prism 24 formation surface of the light guide plate 20 It is emitted from the side and does not become effective light. Furthermore, among the light emitted from the surface side of the light guide plate 20, light that does not enter the human eye cannot feel light, so that light that is effective as well as light that does not satisfy the total reflection condition is Don't be.

  Therefore, even if light is emitted from the surface of the light guide plate 20, the position of the light guide plate where the light enters the human eye is bright, and the position of the light guide plate where the light does not enter the human eye feels dark. From the viewpoint of more light out of the light propagating in the light guide plate 20 satisfying the total reflection condition, exiting from the surface of the light guide plate, and entering the human eye, the slope 26a of the prism 24 with respect to the surface of the light guide plate 20 The inclination θa is desirably set to an angle of 40 to 50 degrees.

  By setting the slope θa of the inclined surface 26a of the prism 24 to an angle of 40 to 50 degrees, light propagating in the light guide plate 20 within an angle range within ± 10 degrees with respect to the horizontal direction can be transmitted in the vertical direction of the light guide plate 20. Can be reflected at an angle within about ± 10 degrees and emitted outside the light guide plate 20.

  The prism 34 provided on the light guide plate 30 is the same as that of the prism 24 provided on the light guide plate 20.

  By providing the prism 24 on the light guide plate 20, the light incident on the prism 24 from the incident end face side out of the light emitted from the LED 22 and incident on the light guide plate 20 is reflected by the prism 24 to be on the lens sheet 40 side of the light guide plate 20. The light can be emitted from the surface. Similarly, by providing the light guide plate 30 with the prism 34, the light emitted from the LED 32 and incident on the light guide plate 30 is reflected by the prism 34 from the incident end face side, and the lens of the light guide plate 30 is reflected. The light can be emitted from the surface on the sheet 40 side (see FIG. 4).

  Since the light guide plate 30 is between the light guide plate 20 and the lens sheet 40, the light emitted from the light guide plate 20 becomes effective light after passing through the light guide plate 30. For this reason, the light guide plates 20 and 30 are arranged so that the ridge line of the groove 26 of the prism 24 and the ridge line of the groove 36 of the prism 34 do not overlap, and the light emitted from the light guide plate 20 is reflected by the prism 34 of the light guide plate 30. It is desirable to prevent this (see FIG. 4).

  Furthermore, it is desirable that the angle θb of the inclined surface 26b of the prism 24 shown in FIG. 3 is an angle close to the horizontal, for example, about 1 to 10 degrees. Since the prism 34 provided on the light guide plate 30 is the same as the prism 24 provided on the light guide plate 20, the light emitted from the light guide plate 20 passes through the light guide plate 30 and is prismatic on the light guide plate 30. There is almost no effect of changing the direction of the light due to the angle of the slope near 34 horizontal.

  The prisms 24 and 34 are not limited to prisms having a shape in which V-shaped grooves 26 are continuously connected as shown in FIG. For example, as shown in FIG. 5B, a prism having a shape in which the adjacent grooves 26 are arranged apart from each other can be applied. In the case of the prism 24 in FIG. 5B as well, as in the prism 24 in FIG. 5A, the slope θa of the inclined surface 26a of the prism 24 with respect to the surface of the light guide plate 20 is set to an angle of 40 to 50 degrees. Is desirable.

  The prism 24 can be formed in any region of the light guide plate 20. Similarly, the prism 34 can be formed in any region of the light guide plate 30.

  The lens sheet 40 is not particularly limited, but it is desirable that the lens sheet 40 diverges after once condensing light. By providing the lens sheet 40 that diverges the light once condensed, the visible range of the light emitted from the illumination device 10 can be expanded, and the entire light emitting region can be recognized by human eyes. As such a lens sheet, a lens array sheet in which a plurality of lens structures are periodically arranged can be applied. For example, a microlens array sheet (see FIG. 6A) in which spherical microlenses 42a are arranged in a lattice shape, and a lenticular lens sheet in which a plurality of cylindrical lenses 42b are arranged in parallel (FIG. 6B). For example, a light diffusion sheet (see FIG. 6C) can be applied. As the light diffusing sheet, a material in which a diffusing material 42c for diffusing light in the material is placed, a material having irregularities on the surface, an opaque member such as milky white, and the like can be applied. In the case of the lenticular lens sheet, the ridge extension direction of the cylindrical lens 42b is arranged in parallel to the propagation direction of the light emitted from the LEDs 22 and 32.

  When a microlens array sheet or a lenticular lens sheet is applied as the lens sheet 40, the lens sheet 40 may be arranged so that the flat surface faces the light guide plate 30 side, or the uneven surface of the lens is on the light guide plate 30 side. You may arrange so that it may face. Moreover, you may use the lens sheet 40 which provided the uneven | corrugated surface of the lens on both surfaces of the sheet | seat. In the case of a lenticular lens, the straightness of light propagation can be increased by directing the uneven surface of the lens toward the light guide plate 30 side. Thereby, even if the length of the light propagation direction in the light guide plates 20 and 30 is increased, the spread of the light emission width can be suppressed.

  The control circuit 50 can turn on / off the LEDs 22 and 32, and can control the emission color in the case of using RGB integrated LEDs. The control circuit 50 can control the emission timing and emission color of the LEDs 22 and 32. The plurality of LEDs 22 and 32 may be collectively controlled or individually controlled. In addition, the timing of light emission / extinguishment may be controlled such that the plurality of LEDs 22 and 32 are sequentially turned on / off.

  Next, the operation of the lighting apparatus according to the present embodiment will be described with reference to FIGS.

  Here, the prism 24 of the light guide plate 20 is provided in the heart-shaped region 62 (see FIG. 7A), and the prism 34 of the light guide plate 30 is provided in the heart-shaped region 64 smaller than the region 62. (See FIG. 7B). The horizontal lines in the regions 62 and 64 schematically represent the extending directions of the ridgelines of the prisms 24 and 34.

  First, the desired LEDs 22 and 32 are turned on by the control circuit 50.

  Light emitted from the LED 22 is introduced into the light guide plate 20 and propagates toward the side surface opposite to the side surface on which the LED 22 is provided while repeating total reflection in the light guide plate 20. In this process, a part of the light enters the prism 24. As shown in FIG. 3, among the light rays propagating through the light guide plate 20 and entering the prism 24, light rays (light rays 28 a) satisfying the total reflection condition with respect to the inclined surface 26 a of the prism 24 are transmitted by the inclined surface 26 a of the prism 24. Totally reflected. The light reflected by the prism 24 propagates in a direction close to a direction perpendicular to the surface of the light guide plate 20 and is emitted from the light guide plate 20. Of the light emitted from the light guide plate 20, light incident on human eyes is used as effective light. On the other hand, a light ray (light ray 28b) that does not satisfy the total reflection condition with respect to the inclined surface 26a of the prism 24 is transmitted through the inclined surface 26a of the prism 24 and is emitted from the prism 24 forming surface side of the light guide plate 20 as effective light. Not used. Further, light that is totally reflected by the inclined surface 26a of the prism 24 and is emitted from the light guide plate 20 is not used as effective light that does not enter the human eye.

  Most of the light emitted from the light guide plate 20 enters the lens sheet 40 through the light guide plate 30. The light incident on the lens sheet 40 is spread by the lens effect corresponding to the type of the lens sheet 40. By spreading by the lens sheet, the light is spread at each position, and the light overlaps and enters the eyes. Therefore, light rays from a position that has not been seen by human eyes will enter the human eye so that the entire surface can be felt bright.

  Similarly, the light emitted from the LED 32 is introduced into the light guide plate 30 and propagates toward the side surface opposite to the side surface on which the LED 32 is provided while repeating total reflection in the light guide plate 30. In this process, part of the light enters the prism 34. Of these rays, a ray satisfying the total reflection condition with respect to the slope of the prism 34 is totally reflected by the slope of the prism 34. The light reflected by the prism 34 propagates in a direction close to a direction perpendicular to the surface of the light guide plate 30 and is emitted from the light guide plate 30. Of the light emitted from the light guide plate 30, light incident on human eyes is used as effective light. On the other hand, light rays that do not satisfy the total reflection condition with respect to the slope of the prism 34 are transmitted through the slope of the prism 34 and emitted from the prism 34 forming surface side of the light guide plate 30 and are not used as effective light. Further, light that is totally reflected by the slope of the prism 34 and is emitted from the light guide plate 30 is not used as effective light that does not enter the human eye.

  Most of the light emitted from the light guide plate 30 enters the lens sheet 40. The light incident on the lens sheet 40 is spread by the lens effect corresponding to the type of the lens sheet 40. By spreading by the lens sheet, the light is spread at each position, and the light overlaps and enters the eyes. Therefore, light rays from a position that has not been seen by human eyes will enter the human eye so that the entire surface can be felt bright.

  When a microlens array sheet is used as the lens sheet 40, the light emitted from the light guide plate 20 is converted into rotationally symmetric light by the lens effect of the microlens array. Thereby, the light emitted from the light guide plate 12 has no directivity, and can be converted into light having a spread in both the propagation direction of the LED light and the direction perpendicular to the propagation direction.

  When a lenticular lens sheet is used as the lens sheet 40, the light emitted from the light guide plate 20 is converted into anisotropic light by the lens effect of the lenticular lens. That is, the light incident on the lens sheet 40 is spread only in a direction perpendicular to the extending direction of the ridge of the lenticular lens. Since the light emitted from the LED 22 is diverging light, an effect equivalent to that obtained when a microarray lens sheet is used can be obtained.

  When the LED 22 is turned on by the control device 50, the heart-shaped region 62 provided with the prism 24 can be illuminated. Similarly, when the LED 32 is turned on by the control device 50, the heart-shaped region 64 provided with the prism 34 can be illuminated.

  Therefore, in the illuminating device in which the light guide plates 20 and 30 shown in FIGS. 7A and 7B are arranged to overlap, if one of the LEDs 22 and 32 (for example, the LED 22) is turned on, the corresponding light guide plate 20 is turned on. , 30 (for example, the region 62) can be illuminated (see FIG. 8A). If both the LEDs 22 and 32 are lit, both the regions 62 and 64 of the light guide plates 20 and 30 can be illuminated (see FIG. 8B). In the region 62 where the prisms 24 and 34 overlap, the light from the light guide plate 20 and the light from the light guide plate 30 can be superimposed and emitted.

  By controlling the light emission color and blinking timing of the LEDs 22 and 32 by the control device 50, various light emission patterns and patterns with movement can be realized, and the role and design as an interface of the lighting device can be improved. Can do.

  As described above, according to the present embodiment, two light guide plates are arranged so as to overlap each other, and prisms are provided at arbitrary positions on these light guide plates to define the light emitting region. Various light emission patterns including overlapping of patterns can be realized. Moreover, the variation of the light emission pattern can be further expanded by controlling the light emission color and the blinking timing of the plurality of light sources. Thereby, the role and design as an interface of a lighting device can be improved.

  In addition, since the light incident from the side surface of the light guide plate is emitted from the surface of the light guide plate by the prism, the distance until the light emitted from the light source is emitted from the light guide plate can be sufficiently increased. Thereby, in-plane distribution unevenness of emission intensity can be prevented, and color reproducibility can be improved.

  In addition, by providing a lens sheet on the light exit surface of the light guide plate that once collects the light and diverges it, the visible range of the emitted light can be expanded, and the entire light emitting area is recognized by the human eye. can do.

[Second Embodiment]
The illumination device according to the second embodiment will be described with reference to FIGS. 9 and 10. The same components as those of the illumination device according to the first embodiment shown in FIGS. 1 to 9 are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  9 and 10 are plan views for explaining the structure and operation of the illumination apparatus according to the present embodiment.

  The illumination device according to the present embodiment is the same as the illumination device according to the first embodiment except that the arrangement of the light guide plate 30 with respect to the light guide plate 20 is different.

  In the illumination device according to the first embodiment, the light guide plates 20 and 30 are arranged so that the side surface of the light guide plate 20 provided with the LEDs 22 faces the side surface of the light guide plate 30 provided with the LEDs 32. On the other hand, in the illuminating device according to the present embodiment, the light guide plates 20 and 30 are arranged so that the side surface of the light guide plate 20 provided with the LEDs 22 and the side surface of the light guide plate 30 provided with the LEDs 32 form an angle of 90 degrees. ing. The angle formed between the side surface of the light guide plate 20 provided with the LEDs 22 and the side surface of the light guide plate 30 provided with the LEDs 32 can be arbitrarily set.

  Also, the shapes of the light guide plates 20 and 30 can be arbitrarily set such as a pentagon or a hexagon other than the quadrangle shown in the figure.

  As shown in FIG. 9, the prism 24 of the light guide plate 20 is provided in the heart-shaped region 62 (see FIG. 9A), and the prism 34 of the light guide plate 30 is smaller than the region 62 in the heart-shaped region 64. (See FIG. 9B). In this case, the prism 24 of the light guide plate 20 is arranged so that the ridge line extends in the vertical direction in order to reflect the light of the LED 22 incident from the left side surface in the drawing. The prism 24 is disposed so that the inclined surface forming the angle θa with respect to the surface of the light guide plate 20 faces the LED 22 side (see FIG. 3). On the other hand, the prism 34 of the light guide plate 30 is disposed so that the ridgeline extends in the lateral direction in order to reflect the light of the LED 32 incident from the upper side surface in the drawing. The prism 34 is disposed such that the inclined surface forming the angle θa with respect to the surface of the light guide plate 30 faces the LED 32 side (see FIG. 3). In FIG. 9, the vertical line in the region 62 and the horizontal line in the region 64 schematically represent the extending directions of the ridgelines of the prisms 24 and 34.

  Even when the light guide plates 20 and 30 are arranged in this way, the lighting device can be controlled by the same method as in the first embodiment.

  For example, as shown in FIG. 10, if one of the LEDs 22 and 32 (for example, the LED 22) is turned on, one of the regions 62 and 64 of the corresponding light guide plates 20 and 30 (for example, the region 62) can be illuminated (FIG. 10). 10 (a)). If both the LEDs 22 and 32 are turned on, both the regions 62 and 64 of the light guide plates 20 and 30 can be illuminated (see FIG. 10B). In the region 62 where the prisms 24 and 34 overlap, the light from the light guide plate 20 and the light from the light guide plate 30 can be superimposed and emitted.

  By controlling the light emission color and blinking timing of the LEDs 22 and 32 by the control device 50, various light emission patterns and patterns with movement can be realized, and the role and design as an interface of the lighting device can be improved. Can do.

  As described above, according to the present embodiment, two light guide plates are arranged so as to overlap each other, and prisms are provided at arbitrary positions on these light guide plates to define the light emitting region. Various light emission patterns including overlapping of patterns can be realized. Moreover, the variation of the light emission pattern can be further expanded by controlling the light emission color and the blinking timing of the plurality of light sources. Thereby, the role and design as an interface of a lighting device can be improved.

[Third Embodiment]
The illumination device according to the third embodiment will be described with reference to FIGS. 11 and 12. Constituent elements similar to those of the lighting apparatus according to the first and second embodiments shown in FIGS. 1 to 10 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  11 and 12 are plan views for explaining the structure and operation of the lighting apparatus according to the present embodiment.

  The illuminating device according to the present embodiment is the same as the illuminating device according to the second embodiment except that the arrangement of the region 62 where the prism 24 of the light guide plate 20 is formed and the region 64 where the prism 34 of the light guide plate 30 is formed are different.

  In the illumination device according to the second embodiment, the light guide plates 20 and 30 are arranged so that the region 64 in which the prism 34 of the light guide plate 30 is formed is located inside the region 62 in which the prism 24 of the light guide plate 20 is formed. However, the region 64 is not necessarily inside the region 62.

  For example, as shown in FIG. 11, the prism 24 of the light guide plate 20 is provided in the heart-shaped region 62 (see FIG. 11A), and the prism 34 of the light guide plate 30 partially overlaps the region 62. (See FIG. 11B).

  Even when the light guide plates 20 and 30 are arranged in this way, the lighting device can be controlled by the same method as in the first embodiment.

  For example, as shown in FIG. 12, if one of the LEDs 22 and 32 is lit, one of the regions 62 and 64 of the corresponding light guide plates 20 and 30 can be illuminated (FIGS. 10A and 10B). )reference). Moreover, if both LED22 and 32 are lighted, both the area | regions 62 and 64 of the light-guide plates 20 and 30 can be made to light (refer FIG.12 (c)). In the region where the prisms 24 and 34 overlap, the light from the light guide plate 20 and the light from the light guide plate 30 can be superimposed and emitted.

  By controlling the light emission color and blinking timing of the LEDs 22 and 32 by the control device 50, various light emission patterns and patterns with movement can be realized, and the role and design as an interface of the lighting device can be improved. Can do.

  As described above, according to the present embodiment, two light guide plates are arranged so as to overlap each other, and prisms are provided at arbitrary positions on these light guide plates to define the light emitting region. Various light emission patterns including overlapping of patterns can be realized. Moreover, the variation of the light emission pattern can be further expanded by controlling the light emission color and the blinking timing of the plurality of light sources. Thereby, the role and design as an interface of a lighting device can be improved.

[Fourth Embodiment]
The illumination device according to the fourth embodiment will be described with reference to FIGS. Constituent elements similar to those of the lighting apparatus according to the first to third embodiments shown in FIGS. 1 to 12 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 13 is a perspective view showing the structure of the illumination device according to the present embodiment. FIG. 14 is a plan view showing the structure of the illumination device according to the present embodiment. FIG. 15 is a diagram for explaining the operation of the prism of the illumination device according to the present embodiment. FIG. 16 is a plan view for explaining the structure and operation of the lighting apparatus according to the present embodiment.

  As illustrated in FIG. 13, the lighting device 10 of the present embodiment includes a light guide plate 70 and a lens sheet 40 disposed on the light guide plate 70.

  The light guide plate 70 has two opposing surfaces and a plurality of side surfaces. LEDs 72a and 72b are provided on two side surfaces of the light guide plate 70, respectively. A control circuit 50 for controlling the light emission of the LEDs 72a and 72b is connected to the LEDs 72a and 72b.

  The LED 72 a is disposed so that the light emitting surface thereof faces one side surface of the light guide plate 70 so that emitted light is introduced into the light guide plate 70. The LED 72 b is disposed so that the light emitting surface thereof faces the other side surface of the light guide plate 70 so that the emitted light is introduced into the light guide plate 70.

  The LED 72a and the LED 72b are provided on the side surfaces where the traveling directions of the light incident on the light guide plate 70 are different from each other. In the example of FIG. 13, LEDs 72 a and 72 b are provided on the side surfaces of the light guide plate 70 that form an angle of 90 degrees with each other. The side surface on which the LEDs 72a and 72b are arranged is not particularly limited as long as the traveling direction of the light emitted from the LEDs 72a and 72b is different. For example, you may make it provide LED72a, 72b in the side surface which the light-guide plate 70 opposes.

  As shown in FIG. 14, prisms 74a and 74b are provided on the surface portion of the light guide plate 70 opposite to the side where the lens sheet 40 is provided. The prism 74 a is provided in the region 66 a of the light guide plate 70, and the prism 74 b is provided in the region 66 b of the light guide plate 70.

  The prisms 74a and 74b are formed by a plurality of grooves provided on the surface portion of the light guide plate 70, as in the prisms 24 and 34 described above. The plurality of grooves of the prism 74a are provided so as to extend in a direction intersecting (for example, orthogonal to) the propagation direction of the light emitted from the LED 72a. For example, the prism 74a is formed by a plurality of grooves extending in a direction parallel to the side surface of the light guide plate 70 on which the LEDs 72a of the light guide plate 70 are provided. The prism 74a is disposed such that the inclined surface forming the angle θa with respect to the surface of the light guide plate 70 faces the LED 72a side (see FIG. 3). The prism 74b is formed by a plurality of grooves extending in a direction parallel to the side surface of the light guide plate 70 provided with the LEDs 72b of the light guide plate 70. For example, the prism 74b is formed by a plurality of grooves extending in a direction parallel to the side surface of the light guide plate 70 on which the LEDs 72b of the light guide plate 70 are provided. The prism 74b is disposed such that the inclined surface forming the angle θa with respect to the surface of the light guide plate 70 faces the LED 72b side (see FIG. 3). In FIG. 14, a horizontal line in the region 66a and a vertical line in the region 66b schematically represent the extending directions of the ridge lines of the prisms 74a and 74b.

  Here, as shown in FIG. 15, a region 66 a in which a prism 74 a in which a ridge line extends in the horizontal direction is formed, and a slope in which the ridge line extends in the vertical direction and forms an angle θa with the surface of the light guide plate 70. Consider a light guide plate 70 provided with a region 66b in which a prism 74b is formed on the left side.

  As shown in FIG. 3, the light that has entered the light guide plate 20 from the LED 22 is reflected by the inclined surface 26 a of the groove 26 of the prism 24 that forms an angle θa with respect to the surface of the light guide plate 20, and is emitted to the lens sheet 40 side. The light becomes effective light. That is, in FIG. 15, when light enters from the LED 72b on the left side, the light incident on the prism 74b is reflected by the prism 74b to become effective light, but the light incident on the prism 74a passes through the prism 74a. Thereby, the region 66b can be selectively illuminated. As described above, by appropriately arranging the prisms corresponding to the traveling direction of the light emitted from the LEDs, a set of a plurality of LEDs and prisms can be provided on one light guide plate.

  In this way, even when a plurality of prisms 74a and 74b that reflect light incident from different directions are provided on one light guide plate 70, the illumination device is controlled by the same method as in the first embodiment. can do.

  For example, as shown in FIG. 16, if one of the LEDs 72a and 72b is turned on, one of the regions 66a and 66b of the corresponding light guide plate 70 can be illuminated (see FIGS. 16A and 16B). ). Moreover, if both LED72a, 72b is lighted, both the area | regions 66a, 66b of the light-guide plate 70 can be made to light (refer FIG.16 (c)).

  The side surface on which the LED 72 is disposed is not particularly limited as long as the traveling direction of light emitted from the LEDs 72 and 74 is different. For example, you may make it provide LED72,74 in the side surface which the light-guide plate 70 opposes.

  By controlling the light emission color and blinking timing of the LEDs 22 and 32 by the control device 50, various light emission patterns and patterns with movement can be realized, and the role and design as an interface of the lighting device can be improved. Can do.

  In the example of FIG. 14, the case where two LEDs 72a and 72b having different traveling directions in the light guide plate 70 are provided, but three or more LEDs having different traveling directions in the light guide plate 70 are provided. Also good. For example, LEDs may be provided on each of the four side surfaces of the light guide plate 70 shown in FIG. 14 and four prisms corresponding to these LEDs may be provided.

  As described above, according to this embodiment, a plurality of light sources are provided on the light guide plate, and prisms corresponding to these light sources are provided, so that the region where the corresponding prism is arranged can be selectively selected by selecting the light source to be lit. Can emit light. In addition, various light emission patterns can be realized by controlling the light emission colors and blinking timings of a plurality of light sources. Thereby, the role and design as an interface of a lighting device can be improved.

  In addition, since the light incident from the side surface of the light guide plate is emitted from the surface of the light guide plate by the prism, the distance until the light emitted from the light source is emitted from the light guide plate can be sufficiently increased. Thereby, in-plane distribution unevenness of emission intensity can be prevented, and color reproducibility can be improved.

  In addition, by providing a lens sheet on the light exit surface of the light guide plate that once collects the light and diverges it, the visible range of the emitted light can be expanded, and the entire light emitting area is recognized by the human eye. can do.

[Fifth Embodiment]
The illumination device according to the fifth embodiment will be described with reference to FIGS. Constituent elements similar to those of the lighting apparatus according to the first to fourth embodiments shown in FIGS. 1 to 16 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 17 is a plan view showing the structure of the illumination device according to the present embodiment. FIG. 18 is a diagram illustrating the structure and function of the prism of the illumination device according to the present embodiment. FIG. 19 is a plan view for explaining the structure and operation of the lighting apparatus according to the present embodiment.

  The illuminating device according to the present embodiment is the same as the illuminating device according to the fourth embodiment except that it further includes a region 66c provided with a prism 74c that reflects both the light emitted from the LED 72a and the light emitted from the LED 72b. It is.

  That is, in the light guide plate 70, for example, as shown in FIG. 17, in addition to the region 66a provided with the prism 74a and the region 66b provided with the prism 74b, a prism 74c that reflects light emitted from the LEDs 72a and 72b. A region 66c provided with is provided.

  In the region 66c of the surface portion different from the side on which the lens sheet 40 is provided of the light guide plate 70, as shown in FIG. 18A, for example, a prism formed by arranging a plurality of pyramidal depressions 76 74c is provided.

  As shown in FIG. 18B, each depression 76 has an angle θa of an inclination angle of the inclined surface 76a facing the side surface on which the LED 72a is provided with respect to the surface of the light guide plate 70. In addition, an inclination angle of the inclined surface 76b facing the side surface on which the LED 72b is provided with respect to the surface of the light guide plate 70 is an angle θa.

  By providing such a prism 74c, the light emitted from the LED 72a can be reflected by the slope 76a, and the light emitted from the LED 72b can be reflected by the slope 76b. Thereby, in the area | region 66c, the light emitted from LED72a and the light emitted from LED72b can be superimposed and light-emitted.

  The prism 74c of the illumination device according to the present embodiment has a quadrangular pyramid shape corresponding to the outer shape of the light guide plate 70 being a rectangular shape, but the shape of the prism 74c is not limited thereto. . An arbitrary polygonal pyramid shape can be applied to the prism 74c depending on the location of the light source.

  In this way, even when a plurality of prisms 74a, 74b, and 74c that reflect light incident from different directions are provided on one light guide plate 70, the illumination device can be obtained in the same manner as in the first embodiment. Can be controlled.

  For example, as shown in FIG. 19, if one of the LEDs 72a and 72b is turned on, one of the region 66a and the region 66c or the region 66b and the region 66c of the corresponding light guide plate 70 can be illuminated (FIG. 19 ( a) and FIG. 19B). Further, if both the LEDs 72a and 72b are turned on, all the regions 66a, 66b and 66c of the light guide plate 70 can be illuminated (see FIG. 19C). In the region 66c, the light emitted from the LED 72a and the light emitted from the LED 72b can be superimposed and emitted.

  By controlling the light emission color and blinking timing of the LEDs 22 and 32 by the control device 50, various light emission patterns and patterns with movement can be realized, and the role and design as an interface of the lighting device can be improved. Can do.

  As described above, according to this embodiment, a plurality of light sources are provided on the light guide plate, and prisms corresponding to these light sources are provided, so that the region where the corresponding prism is arranged can be selectively selected by selecting the light source to be lit. Can emit light. In addition, by providing a prism that reflects light emitted from a plurality of light sources, various light emission patterns including overlapping of patterns, such as generating another pattern in the pattern, can be realized. In addition, various light emission patterns can be realized by controlling the light emission colors and blinking timings of a plurality of light sources. Thereby, the role and design as an interface of a lighting device can be improved.

[Sixth Embodiment]
The illumination device according to the sixth embodiment will be described with reference to FIGS. Constituent elements similar to those of the lighting apparatus according to the first to fifth embodiments shown in FIGS. 1 to 19 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 20 is a plan view showing the structure of the illumination device according to the present embodiment. FIG. 21 is a plan view for explaining the structure and operation of the lighting apparatus according to the present embodiment.

  The illumination device according to the present embodiment is obtained by applying the light guide plate 70 of the illumination device according to the fourth embodiment instead of the light guide plate 30 in the illumination device according to the first embodiment. For example, as shown in FIG. 20, the light guide plate 20 provided with the LED 22, the prism 24 that reflects the light emitted from the LED 22, the LEDs 72a and 72b, and the prism that reflects the light emitted from the LEDs 72a and 72b. And a light guide plate 70 provided with 74a and 74b. The prism 24 is formed in the region 62 of the light guide plate 20, and the prisms 74 a and 74 b are formed in the regions 66 a and 66 b of the light guide plate 70.

  Even when the light guide plates 20 and 70 are arranged in this way, the illumination device can be controlled by the same method as in the first embodiment.

  For example, as shown in FIG. 21, if only the LED 22, for example, of the LEDs 22, 72a, 72b is turned on, the region 62 of the light guide plate 20 can be illuminated (see FIG. 21 (a)). Further, for example, when the LED 22 and the LED 72a are turned on among the LEDs 22, 72a and 72b, the region 62 of the light guide plate 20 can be illuminated and the region 66a of the light guide plate 70 can be illuminated (see FIG. 21B). In the region where the prisms 24 and 74a overlap, the light from the light guide plate 20 and the light from the light guide plate 70 can be superimposed and emitted. Moreover, if LED22 and LED72b are lighted among LED22, 72a, 72b, for example, while the area | region 62 of the light-guide plate 20 can be made to light, the area | region 66b of the light-guide plate 70 can be made to light (refer FIG.21 (c)). In the region where the prisms 24 and 74b overlap, the light from the light guide plate 20 and the light from the light guide plate 70 can be superimposed and emitted.

  By controlling the light emission color and blinking timing of the LEDs 22, 72a, 72b by the control device 50, various light emission patterns and moving patterns can be realized, improving the role and design of the lighting device interface can do.

  As described above, according to the present embodiment, two light guide plates are arranged so as to overlap each other, and prisms are provided at arbitrary positions on these light guide plates to define the light emitting region. Various light emission patterns including overlapping of patterns can be realized. In addition, since a plurality of light sources are provided on one light guide plate, and prisms corresponding to these light sources are respectively provided, by selecting a light source to be lit, a region where the corresponding prism is arranged can be selectively emitted. Moreover, the variation of the light emission pattern can be further expanded by controlling the light emission color and the blinking timing of the plurality of light sources. Thereby, the role and design as an interface of a lighting device can be improved.

[Seventh Embodiment]
An electronic apparatus according to the seventh embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the component similar to the illuminating device by 1st thru | or 6th embodiment shown in FIG. 1 thru | or FIG. 21, description is abbreviate | omitted or simplified.

  22 and 23 are perspective views for explaining the structure and operation of the electronic apparatus according to the present embodiment.

  A cellular phone 80 shown in FIG. 22 includes a first casing 82 and a second casing 84, and the first casing 82 and the second casing 84 are formed to be foldable. FIG. 22 shows a state in which the mobile phone 80 is opened, and FIG. 23 shows a state in which the mobile phone 80 is closed.

  As shown in FIG. 22, the first casing 82 is provided with an operation unit 86 having an input device including a character input key, a numeric keypad, a cross key, a determination key, and other function keys. The second housing 84 is provided with a display unit 88 for displaying predetermined information. Also, as shown in FIG. 23, a light emitting unit 90 is provided on the back surface of the second housing 84. The light emitting unit 90 is not particularly limited, and is for visually informing an incoming call or e-mail, for example. The light emitting unit 90 may be disposed on the operation unit 86 or the display unit 88.

  A cellular phone 80 shown in FIG. 23 is an example in which the illumination device according to the sixth embodiment is applied as the light emitting unit 90. By turning on only the LED 22 of the lighting device installed in the light emitting unit 90 (see FIG. 20), a large heart shape can be displayed in the region 62 (FIG. 23A). Further, by turning on the LEDs 22, 72a, 72b of the lighting device installed in the light emitting unit 90 (see FIG. 20), a large heart shape is displayed in the region 62, and is superimposed on the regions 66a, 66b. A small heart shape can be displayed (FIG. 23B). Further, the display pattern of the light emitting unit 90 can be dynamically changed by the control device 50. Thereby, it is possible to visually notify the arrival of an incoming call or electronic mail.

  The light emission pattern of the illuminating device that forms the light emitting unit 90 can be changed as appropriate by controlling the light emission color and timing of the LEDs 22, 72a, 72b. Therefore, the light emission pattern can be appropriately set according to the purpose, such as distinguishing between incoming calls and incoming e-mails.

  The illuminating devices according to the first to sixth embodiments emit light emitted from the LEDs from the side surface of the light guide plate and output to the surface side of the light guide plate, thereby reducing unevenness in the distribution of light emission intensity and color expression. The thickness of the lighting device can be reduced while improving the above. Thereby, it is possible to reduce the size and thickness of an electronic device equipped with a lighting device.

  Moreover, the illuminating device by 1st thru | or 6th embodiment can set a light emission area | region and color arbitrarily by arrangement | positioning of LED and a prism. Thereby, various light emission patterns and patterns with movement can be realized, and the role as an interface and the design can be improved.

  In the above-described embodiment, a mobile phone is described as an example of the electronic device. However, the use of the disclosed lighting device is not limited to the mobile phone, and can be applied to various electronic devices using the lighting device. . In particular, the disclosed lighting device is suitable for downsizing and thinning, and is effectively applied to electronic devices such as mobile phones, portable information terminals, and portable game machines that are required to be downsized and thinned.

  Thus, according to the present embodiment, it is possible to reduce the size and thickness of an electronic device equipped with a lighting device. In addition, since the light emitting area and color of the lighting device can be arbitrarily set, various light emission patterns can be realized, and the role and design as an interface can be improved.

[Modified Embodiment]
The present invention is not limited to the above embodiment, and various modifications are possible.

  For example, in the first to third embodiments, the light guide plate 30 is disposed between the light guide plate 20 and the lens sheet 40, but the light guide plate 20 is disposed between the light guide plate 30 and the lens sheet 40. May be.

  In the sixth embodiment, the light guide plate 70 is disposed between the light guide plate 20 and the lens sheet 40. However, the light guide plate 20 may be disposed between the light guide plate 70 and the lens sheet 40. .

  In the first to third embodiments and the sixth embodiment, the lighting device in which two light guide plates are stacked is shown. However, the lighting device may be formed by stacking three or more light guide plates. Good.

  Moreover, although the said 6th Embodiment showed the illuminating device which combined the light-guide plate 20 of the illuminating device by 1st Embodiment, and the light-guide plate 70 of the illuminating device by 4th Embodiment, the combination of a light-guide plate is shown. It is not limited to this. For example, you may make it form the illuminating device which combined the light-guide plate 20 of the illuminating device by 1st Embodiment, and the light-guide plate 70 of the illuminating device by 5th Embodiment.

  Further, in the above embodiment, the lens sheet 40 is arranged on the almost entire area on the light guide plate. However, the lens sheet 40 is selectively formed on the light emitting area (areas 62, 64, 66a, 66b, 66c) of the light guide plate. You may make it form in.

  Moreover, although the case where the light emission area | region of the light-guide plate was made into the heart shape was shown in the said embodiment, the shape of a light emission area | region is not limited to this. The light emitting area can be defined by the outer shape of the prism. An arbitrary light emission pattern can be formed by appropriately setting the outer shape of the prism.

DESCRIPTION OF SYMBOLS 10 ... Illuminating device 20, 30, 70 ... Light guide plate 22, 32, 72a, 72b ... LED
24, 34, 74a, 74b, 74c ... Prism 26, 36 ... Groove 26a, 26b ... Groove slope 28 ... Light beam 40 ... Lens sheet 50 ... Control circuit 62, 64, 66a, 66b, 66c ... Light emitting area 76 ... Indent 76a , 76b... Sloped surface 80... Mobile phone 82... First housing 84 .. second housing 86.

Claims (8)

A flat first light guide plate;
A first light source that is provided on a side surface of the first light guide plate and that makes light enter the first light guide plate from the side surface;
The light is provided on one surface of the first light guide plate, reflects the light emitted from the first light source and propagates in the first light guide plate, and is reflected from the other surface of the first light guide plate. A first prism to exit;
A flat second light guide plate disposed on the other surface side of the first light guide plate;
A second light source that is provided on a side surface of the second light guide plate and that allows light to enter the second light guide plate from the side surface;
The second light guide plate is provided on one surface on the first light guide plate side, reflects the light emitted from the second light source and propagating through the second light guide plate, and the second light guide plate. A second prism that exits from the other surface of the light guide plate;
A lens sheet that is disposed on the other surface side of the second light guide plate, and once converges the light emitted from the first light guide plate and the second light guide plate, and then diverges. A lighting device. The lighting device according to claim 1.
The first prism provided on the first light guide plate and the second prism provided on the second light guide plate are arranged so as to overlap at least in a part of the region. A lighting device characterized by the above. The lighting device according to claim 1 or 2,
The position of the reflective part of the said 1st prism and the position of the reflective part of the said 2nd prism have shifted | deviated. The illuminating device characterized by the above-mentioned. A flat first light guide plate;
A first light source that is provided on one side surface of the first light guide plate and that makes light enter the first light guide plate from the one side surface;
A second light source that is provided on the other side surface of the first light guide plate and makes light incident on the first light guide plate from the other side surface;
The light is provided on one surface of the first light guide plate, reflects the light emitted from the first light source and propagates in the first light guide plate, and is reflected from the other surface of the first light guide plate. A first prism to exit;
The other surface of the first light guide plate that is provided on the one surface of the first light guide plate and reflects the light emitted from the second light source and propagating through the first light guide plate. A second prism emanating from
An illumination device, comprising: a lens sheet that is disposed on the other surface side of the first light guide plate, and once collects the light emitted from the first light guide plate and then diverges. The lighting device according to claim 4.
Provided on the one surface of the first light guide plate, emitted from the first light source and propagated in the first light guide plate, and emitted from the second light source and the first light source. An illumination device, further comprising a third prism that reflects the light propagating through the light guide plate and emits the light from the other surface of the first light guide plate. The lighting device according to claim 4 or 5,
A plate-like second light guide plate disposed between the one surface side of the first light guide plate or between the first light guide plate and the lens sheet;
A third light source that is provided on a side surface of the second light guide plate, and that makes light enter the second light guide plate from the side surface;
The second light guide plate is provided on one surface opposite to the lens sheet side and reflects the light emitted from the third light source and propagating through the second light guide plate. The illumination device further comprising: a fourth prism that emits light from the other surface of the two light guide plates. A flat first light guide plate; a first light source that is provided on a side surface of the first light guide plate; and that enters light into the first light guide plate from the side surface; and A first prism that is provided on one surface, reflects the light emitted from the first light source and propagates in the first light guide plate, and exits from the other surface of the first light guide plate; A flat plate-like second light guide plate disposed on the other surface side of the first light guide plate, and a side surface of the second light guide plate, and from the side surface into the second light guide plate. A second light source for entering light and a surface of the second light guide plate on the first light guide plate side, which are emitted from the second light source and propagate through the second light guide plate A second prism that reflects the light to be emitted from the other surface of the second light guide plate, and the other of the second light guide plate Is arranged on the side, a lighting device having a lens sheet emanating from the temporarily focusing the light emitted from the first light guide plate and the second light guide plate,
An electronic apparatus comprising: a control circuit that controls a light emission color or a blinking timing of the first light source and the second light source. A first light guide plate having a flat plate shape; a first light source provided on one side surface of the first light guide plate and configured to enter light into the first light guide plate from the one side surface; Provided on the other side of the light guide plate, provided on one surface of the first light guide plate, a second light source for entering light from the other side into the first light guide plate, A first prism that reflects the light emitted from one light source and propagates in the first light guide plate and emits from the other surface of the first light guide plate; and the first light guide plate A second prism provided on one surface, reflecting the light emitted from the second light source and propagating through the first light guide plate, and exiting from the other surface of the first light guide plate; The light is disposed on the other surface side of the first light guide plate and once collects the light emitted from the first light guide plate. A lighting device having a lens sheet for diffusing,
An electronic apparatus comprising: a control circuit that controls a light emission color or a blinking timing of the first light source and the second light source.

Images