Patent Description:
A light emitting device in the related art includes a plurality of light emitting elements, a wavelength conversion layer disposed above the plurality of light emitting elements, and a frame body having an inner peripheral surface surrounding each of the plurality of light emitting elements and having a quadrangular opening surrounding each of the plurality of light emitting elements (see <CIT>). Furthermore, an illumination switch described in <CIT> comprises a light emitting element mounted on a lower surface of a mounting hole provided in the light source and illuminating the display portion of the operating body through the mounting hole.

In the above-described light emitting device in the related art, the frame body defines each region of the wavelength conversion layer that is irradiated with light emitted from a corresponding one of the plurality of light emitting elements. Such a light emitting device, however, cannot meet a demand for variations of indication in which lights emitted from the plurality of light emitting devices are indicated in a superimposed manner or light emitted from one of the plurality of light emitting elements is exclusively indicated.

An indicating device according to the present invention includes the features defined in claim <NUM>.

According to the present invention, a part of the indicating part adjacent to the first light emitting element relative to the partition wall is irradiated with the light emitted from the first light emitting element and the light emitted from the second light emitting element in a superimposed manner. On the other hand, a part of the indicating part adjacent to the second light emitting element relative to the partition wall is irradiated only with the light emitted from the second light emitting element. This makes it possible to increase variations of indication. Further embodiments of the present invention are described below and define optional features.

In the indicating device according to an embodiment,
a longest distance between the first light emitting element and the first region is shorter than a shortest distance between the second light emitting element and the first region.

The longer the distance from the light source, the smaller the light intensity. According to the above-described embodiment, the longest distance between the first light emitting element and the first region is shorter than the shortest distance between the second light emitting element and the first region. This makes, even in a case where the first light emitting element and the second light emitting element emit light having approximately the same light emission intensity, light reaching the first region from the first light emitting element larger in illuminance than light reaching the first region from the second light emitting element. This allows the light emission color of the first light emitting element to be clearly indicated in the first region.

The indicating device according to an embodiment further includes a cover provided to cover the indicating part, the cover including a light-shielding part having a light-shielding property, the light-shielding part being provided to cover a part of the first region.

According to the above-described embodiment, the light-shielding part is provided to cover the part of the first region, so that the first region is partially shielded from light. Accordingly, the part illuminated by the first light emitting element and the second light emitting element and the part shielded from light by the light-shielding part are positioned adjacent to each other in the first region. This makes the indicated part in the first region clear.

The indicating device according to an embodiment further includes a switch, in which
the light-shielding part of the cover is disposed at a position corresponding to an operation part of the switch.

According to the above-described embodiment, the light-shielding part of the cover is disposed at the position corresponding to the operation part of the switch, so that the light-shielding part allows a user to clearly recognize the position of the operation part of the switch.

In the indicating device according to an embodiment, the first region irradiated with the light emitted from the first light emitting element is higher in average illuminance than the first region irradiated with the light emitted from the second light emitting element.

According to the above-described embodiment, the first region irradiated with the light emitted from the first light emitting element is higher in average illuminance than the first region irradiated with the light emitted from the second light emitting element, so that the light emission color of the first light emitting element can be clearly indicated in the first region.

According to an embodiment, the first light emitting element is a single-color LED, and the second light emitting element is a multi-color LED capable of emitting light of a plurality of colors.

An air conditioner according to the present invention includes the indicating device.

The air conditioner according to an embodiment has a plurality of operating modes, and a light emission mode of the indicating device changes in accordance with each of the operating modes.

According to the above-described embodiment, the light emission mode of the indicating device changes in accordance with each of the operating modes of the air conditioner, so that the user can easily recognize each of the operating modes of the air conditioner. Further, for example, changing a light emission pattern or a light emission color as the light emission mode allows an increase in visibility of the indicating part.

With reference to the attached drawings, a description will be given below of an embodiment of the present invention.

<FIG> is a perspective view of an indoor unit <NUM> of an air conditioner according to the embodiment of the present invention.

As illustrated in <FIG>, the air conditioner according to the present embodiment is an air conditioner including the indoor unit <NUM> of a floor-standing type. The air conditioner according to the present embodiment has four operating modes, a cooling operating mode, a heating operating mode, a ventilation operating mode, and a dehumidifying operating mode.

The indoor unit <NUM> includes a casing <NUM> that houses components such as a fan (not illustrated) and a heat exchanger (not illustrated). The casing <NUM> includes a top grille <NUM> provided with a blow-out port <NUM>. The above-described blow-out port <NUM> is provided with a horizontal flap <NUM> for adjusting an airflow direction.

The indoor unit <NUM> includes an indicating device <NUM> whose light emission mode changes in accordance with each of the operating modes of the air conditioner. The indicating device <NUM> is embedded in the top grille <NUM> of the indoor unit <NUM> so as to allow a user to visually recognize each of the light emission modes.

<FIG> is an exploded perspective view of the indicating device <NUM> according to the present embodiment.

With reference to <FIG>, the indicating device <NUM> according to the present embodiment includes a printed circuit board <NUM>, a lamp cover <NUM>, a switch cover <NUM>, a light receiving lens <NUM>, and a front cover <NUM>. With the indicating device <NUM> built up, the front cover <NUM>, the switch cover <NUM>, the lamp cover <NUM>, and the printed circuit board <NUM> are arranged in this order from the outside of the indoor unit <NUM> (illustrated in <FIG>).

On the printed circuit board <NUM> according to the present embodiment, a first light emitting element <NUM> and a second light emitting element <NUM> capable of emitting light different in light emission color from light emitted from the first light emitting element <NUM> are mounted. According to the present embodiment, the first light emitting element <NUM> is a single-color light emitting diode (LED) capable of emitting green light. The second light emitting element <NUM> is a multi-color LED capable of emitting light of a plurality of colors. Specifically, the second light emitting element <NUM> is a multi-color LED that includes a red LED chip, a green LED chip, and a blue LED chip so as to be capable of emitting light of each color, that is, red light, blue light, or green light, and light that is a mixture of some of the red light, the blue light, and the green light. On the printed circuit board <NUM>, a third light emitting element <NUM> is further mounted. The third light emitting element <NUM> according to the present embodiment is a single-color LED capable of emitting white light.

On the printed circuit board <NUM>, an operation switch <NUM> and a light receiving element <NUM> are mounted. When the operation switch <NUM> is operated, the above-described air conditioner is switched between operation and non-operation. Further, the light receiving element <NUM> receives a signal from an external operation device such as a remote controller. The operation switch <NUM> according to the present embodiment is an example of a switch according to the present invention.

The lamp cover <NUM> is provided so as to cover the printed circuit board <NUM>. The lamp cover <NUM> is made of light-shielding resin.

The lamp cover <NUM> includes a wall <NUM> having a tubular shape. A hole defined by the wall <NUM> allows a space of the lamp cover <NUM> adjacent to the switch cover <NUM> and a space of the lamp cover <NUM> adjacent to the printed circuit board <NUM> to communicate with each other. With the indicating device <NUM> built up, the lamp cover <NUM> is disposed so as to cause the wall <NUM> to surround the first light emitting element <NUM>, the second light emitting element <NUM>, and the third light emitting element <NUM> provided on the printed circuit board <NUM>.

The wall <NUM> is provided with a partition wall <NUM> having an approximately semitubular shape and projecting toward the inside of the wall <NUM>. With the indicating device <NUM> built up, the lamp cover <NUM> is disposed so as to cause the partition wall <NUM> and a part of the wall <NUM> to surround the first light emitting element <NUM> provided on the printed circuit board <NUM>.

The lamp cover <NUM> is formed of a monolithic component. That is, the wall <NUM> and the partition wall <NUM> provided on the wall <NUM> are integrally formed. The wall <NUM> and the partition wall <NUM> provided on the wall <NUM> are made of light-shielding resin.

The lamp cover <NUM> is provided with a receiving hole <NUM> for receiving the light receiving lens <NUM>. The receiving hole <NUM> allows a space of the lamp cover <NUM> adjacent to the printed circuit board <NUM> and a space of the lamp cover <NUM> adjacent to the top grille <NUM> to communicate with each other.

The switch cover <NUM> according to the present embodiment includes an indicating part <NUM> that is translucent and has a dome shape. The indicating part <NUM> is irradiated with light emitted from each of the first light emitting element <NUM>, the second light emitting element <NUM>, and the third light emitting element <NUM>. With the indicating device <NUM> built up, the switch cover <NUM> is attached to the lamp cover <NUM> so as to cause the indicating part <NUM> to cover an opening defined by the wall <NUM> of the lamp cover <NUM>. Further, with the indicating device <NUM> built up, the switch cover <NUM> is disposed so as to position the indicating part <NUM> in a circular first hole 11a provided in the top grille <NUM>.

With the indicating device <NUM> built up, the light receiving lens <NUM> is attached to a second hole 11b provided in the top grille <NUM>. A part of the light receiving lens <NUM> is exposed to the outside of the indoor unit <NUM> (illustrated in <FIG>) from the second hole 11b of the top grille <NUM>. The light receiving lens <NUM> receives light (for example, infrared rays) from an external operation device such as a remote controller to guide the light toward the light receiving element <NUM> provided on the printed circuit board <NUM>.

The front cover <NUM> is attached to the top grille <NUM> so as to cover the first hole 11a of the top grille <NUM> and the indicating part <NUM> of the switch cover <NUM> disposed in the first hole 11a. The front cover <NUM> includes a protrusion <NUM> that is translucent and has a circular dome shape, the protrusion <NUM> being provided so as to cover the indicating part <NUM> of the switch cover <NUM>. A light-shielding coating is applied to a part of the protrusion <NUM>. Accordingly, a light-shielding part <NUM> having a circular shape is formed in the part of the protrusion <NUM>. The front cover <NUM> according to the present embodiment is an example of a cover according to the present invention.

<FIG> is a plan view of a region around the indicating device <NUM> according to the present embodiment. <FIG> illustrates a state where the switch cover <NUM> and the front cover <NUM> (illustrated in <FIG>) are removed.

With reference to <FIG>, the partition wall <NUM> is provided so as to surround the first light emitting element <NUM>. Accordingly, the first light emitting element <NUM> and the second light emitting element <NUM> are separated from each other by the partition wall <NUM>. In other words, the partition wall <NUM> is provided so as to intersect with a virtual line VL connecting a center of the first light emitting element <NUM> and a center of the second light emitting element <NUM>. Further, the second light emitting element <NUM> and the third light emitting element <NUM> are disposed on a side opposite to the first light emitting element <NUM> relative to the partition wall <NUM>. Note that when the first light emitting element <NUM> is viewed from above, a center of gravity of an upper surface of the first light emitting element <NUM> coincides with a center of the first light emitting element <NUM>. Similarly, when the second light emitting element <NUM> is viewed from above, a center of gravity of an upper surface of the second light emitting element <NUM> coincides with a center of the second light emitting element <NUM>.

A first distance d1 between the partition wall <NUM> and the first light emitting element <NUM> is shorter than a second distance d2 between the partition wall <NUM> and the second light emitting element <NUM>. Specifically, the first distance d1 is a distance on the virtual line VL between the partition wall <NUM> and the first light emitting element <NUM>. The second distance d2 is a distance on the virtual line VL between the partition wall <NUM> and the second light emitting element <NUM>. According to the present embodiment, the second distance d2 is at least twice the first distance d1. The second distance d2 is preferably at least three times the first distance d1.

<FIG> is a plan view of the region around the indicating device <NUM> according to the present embodiment. <FIG> illustrates a state where the front cover <NUM> (illustrated in <FIG>) is removed. That is, in <FIG>, the switch cover <NUM> is exposed.

The indicating part <NUM> according to the present embodiment includes a first region <NUM> irradiated with the light emitted from the first light emitting element <NUM> and the light emitted from the second light emitting element <NUM>, and a second region <NUM> irradiated only with the light emitted from the second light emitting element <NUM>. In <FIG>, the first region <NUM> is indicated by dot hatching, and the second region <NUM> is indicated by line hatching.

The first region <NUM> is defined by the partition wall <NUM>. The partition wall <NUM> having a light-shielding property can prevent the light emitted from the first light emitting element <NUM> from spreading to the outside of the first region <NUM> by limiting a region of the indicating part <NUM> irradiated with the light emitted from the first light emitting element <NUM> to the first region <NUM>. This makes it possible to clearly distinguish between the first region <NUM> irradiated with the light emitted from the first light emitting element <NUM> and the second region <NUM> not irradiated with the light emitted from the first light emitting element <NUM> in the indicating part <NUM>. Further, the first region <NUM> is partially covered with the light-shielding part <NUM> (indicated by a long dashed double-short dashed line in the drawing) of the front cover <NUM>.

The indicating part <NUM> is entirely irradiated with the light emitted from the second light emitting element <NUM> according to the present embodiment. Similarly, the indicating part <NUM> is roughly entirely irradiated with the light emitted from the third light emitting element <NUM> according to the present embodiment. The second region <NUM> according to the present embodiment is a part of the indicating part <NUM> not irradiated with the light emitted from the first light emitting element <NUM>. Further, the second region <NUM> is partially covered with the light-shielding part <NUM> (indicated by a long dashed double-short dashed line in the drawing) of the front cover <NUM>.

The first region <NUM> irradiated with the light emitted from the first light emitting element <NUM> is higher in average illuminance than the first region <NUM> irradiated with the light emitted from the second light emitting element <NUM>.

A longest distance L1 between the first light emitting element <NUM> and the first region <NUM> is shorter than a shortest distance L2 between the second light emitting element <NUM> and the first region <NUM>. The longest distance L1 is a linear distance in a three-dimensional space between a point A farthest from the first light emitting element <NUM> in the first region <NUM> and the first light emitting element <NUM> (illustrated in a planar view in <FIG>). Similarly, the shortest distance L2 is a linear distance in a three-dimensional space between a point B closest to the second light emitting element <NUM> in the first region <NUM> and the second light emitting element <NUM> (illustrated in a planar view in <FIG>).

<FIG> is a cross-sectional view taken along line V-V of <FIG>.

With reference to <FIG>, the first light emitting element <NUM>, the second light emitting element <NUM>, and the third light emitting element <NUM> are surrounded by the wall <NUM> of the lamp cover <NUM>. Further, the partition wall <NUM> having a light-shielding property is provided between the first light emitting element <NUM> and the second light emitting element <NUM>. Further, the partition wall <NUM> is disposed at a distance from the indicating part <NUM> of the switch cover <NUM>. The partition wall <NUM> prevents the light emitted from the first light emitting element <NUM> from widely spreading and defines the first region <NUM> by limiting the region irradiated with the light emitted from the first light emitting element <NUM> in the indicating part <NUM>. On the other hand, the light emitted from the second light emitting element <NUM> passes between the partition wall <NUM> and the indicating part <NUM> to impinge all over the indicating part <NUM>. The partition wall <NUM> is smaller in dimension in a rising direction (vertical direction in <FIG>) than the wall <NUM>. The dimension of the partition wall <NUM> in the rising direction is at least <NUM>/<NUM> times the dimension of the wall <NUM> in the rising direction. The dimension of the partition wall <NUM> in the rising direction is preferably at least <NUM>/<NUM> times the dimension of the wall <NUM> in the rising direction.

A surface of the printed circuit board <NUM> includes an installation region R defined by the wall <NUM> of the lamp cover <NUM>. The partition wall <NUM> partitions the installation region R into a first installation region R1 and a second installation region R2. The first light emitting element <NUM> is disposed in the first installation region R1, and the second light emitting element <NUM> is disposed in the second installation region R2.

The switch cover <NUM> includes a projecting part <NUM> extending from the indicating part <NUM> toward the operation switch <NUM>. When the indicating part <NUM> is pressed toward the printed circuit board <NUM>, the projecting part <NUM> moves toward the printed circuit board <NUM> to press the operation switch <NUM> provided on the printed circuit board <NUM>. That is, the switch cover <NUM> according to the present embodiment serves as an operation part that is operated by the user to operate the operation switch <NUM>. The indicating part <NUM> of the switch cover <NUM> according to the present embodiment is an example of an operation part of a switch according to the present invention.

The light receiving lens <NUM> is partially exposed to the outside from the top grille <NUM>. Further, the light receiving lens <NUM> extends from the part exposed to the outside toward the light receiving element <NUM>.

The front cover <NUM> is disposed so as to cause the protrusion <NUM> to face the indicating part <NUM> of the switch cover <NUM>. Accordingly, the light-shielding part <NUM> formed in the protrusion <NUM> is disposed at a position corresponding to the indicating part <NUM> serving as the operation part of the switch according to the present invention. Further, the protrusion <NUM> protrudes in a direction remote from the indicating part <NUM>. This increases visibility of the indicating part <NUM> as viewed from the side.

<FIG> is a diagram illustrating one light emission mode of the indicating device <NUM> according to the present embodiment.

In one light emission mode illustrated in <FIG>, the first light emitting element <NUM> (illustrated in <FIG>) is off, and the second light emitting element <NUM> (illustrated in <FIG>) or the third light emitting element <NUM> (illustrated in <FIG>) is on. For example, when the air conditioner is in the cooling operating mode, the second light emitting element <NUM> irradiates the first region <NUM> and the second region <NUM> with blue emission light. Further, the indicating device <NUM> causes, when the air conditioner is in the heating operating mode, the second light emitting element <NUM> to irradiate the first region <NUM> and the second region <NUM> with red emission light. When the air conditioner is in the dehumidifying operating mode, the second light emitting element <NUM> irradiates the first region <NUM> and the second region <NUM> with green emission light. Further, for example, when the air conditioner is in the ventilation operating mode, the third light emitting element <NUM> irradiates the first region <NUM> and the second region <NUM> with white emission light. The combinations of the operating mode of the air conditioner and the color indicated in the second region <NUM> are not limited to the combinations described above.

<FIG> is a diagram illustrating another light emission mode of the indicating device <NUM> according to the present embodiment.

In another light emission mode illustrated in <FIG>, the first light emitting element <NUM> (illustrated in <FIG>) is on, and the second light emitting element <NUM> (illustrated in <FIG>) or the third light emitting element <NUM> (illustrated in <FIG>) is on. For example, when a timer is set, the indicating device <NUM> turns on the first light emitting element <NUM> in addition to the second light emitting element <NUM> or the third light emitting element <NUM> to indicate that the timer has been set.

For example, when the air conditioner is in the cooling operating mode, the first region <NUM> is irradiated with light including green emission light emitted from the first light emitting element <NUM> and blue emission light emitted from the second light emitting element <NUM>, and the second region <NUM> is irradiated with the blue emission light emitted from the second light emitting element <NUM>. Accordingly, when the air conditioner is in the cooling operating mode, a bluish green color is indicated in the first region <NUM>, and a blue color different from the color indicated in the first region <NUM> is indicated in the second region <NUM>.

For example, when the air conditioner is in the heating operating mode, the first region <NUM> is irradiated with light including green emission light emitted from the first light emitting element <NUM> and red emission light emitted from the second light emitting element <NUM>, and the second region <NUM> is irradiated with the red emission light emitted from the second light emitting element <NUM>. Accordingly, when the air conditioner is in the cooling operating mode, a reddish green color is indicated in the first region <NUM>, and a red color different from the color indicated in the first region <NUM> is indicated in the second region <NUM>.

For example, when the air conditioner is in the dehumidifying operating mode, the first region <NUM> is irradiated with light including green emission light emitted from the first light emitting element <NUM> and green emission light emitted from the second light emitting element <NUM>, and the second region <NUM> is irradiated with the green emission light emitted from the second light emitting element <NUM>. At this time, for example, the green color of the light emitted from the first light emitting element <NUM> may be more vivid than the green color of the light emitted from the second light emitting element <NUM>. Accordingly, when the air conditioner is in the dehumidifying operating mode, a vivid green color is indicated in the first region <NUM>, and a green color different from the green color indicated in the first region <NUM> is indicated in the second region <NUM>.

For example, when the air conditioner is in the ventilation operating mode, the first region <NUM> is irradiated with light including green emission light emitted from the first light emitting element <NUM> and white emission light emitted from the third light emitting element <NUM>, and the second region <NUM> is irradiated with the white emission light emitted from the third light emitting element <NUM>. Accordingly, when the air conditioner is in the ventilation operating mode, a whitish green color is indicated in the first region <NUM>, and a white color different from the color indicated in the first region <NUM> is indicated in the second region <NUM>.

The indicating device <NUM> according to the present embodiment has the following effects.

The first distance d1 between the first light emitting element <NUM> and the partition wall <NUM> is shorter than the second distance d2 between the second light emitting element <NUM> and the partition wall <NUM>. Therefore, a part of the indicating part <NUM> adjacent to the first light emitting element <NUM> relative to the partition wall <NUM> is irradiated with the light emitted from the first light emitting element <NUM> and the light emitted from the second light emitting element <NUM> in a superimposed manner. On the other hand, a part of the indicating part <NUM> adjacent to the second light emitting element <NUM> relative to the partition wall <NUM> is irradiated only with the light emitted from the second light emitting element <NUM>. This makes it possible to increase variations of indication for the indicating part <NUM>.

If the partition wall <NUM> is in contact with the indicating part <NUM> with no gap between the indicating part <NUM> and the partition wall <NUM>, a part that is not irradiated with either the light emitted from the first light emitting element <NUM> or the light emitted from the second light emitting element <NUM> appears in a region of the indicating part <NUM> facing the partition wall <NUM>. The above-described part, therefore, prevents the region irradiated with the light emitted from the first light emitting element <NUM> and the region irradiated with the light emitted from the second light emitting element <NUM> from being continuous with each other. On the other hand, according to the above-described embodiment, the indicating part <NUM> and the partition wall <NUM> are arranged at a distance from each other, so that a part of the light emitted from the second light emitting element <NUM> passes between the indicating part <NUM> and the partition wall <NUM> to impinge on the first region <NUM>. This allows the first region <NUM> and the second region <NUM> of the indicating part <NUM> to be illuminated without interruption.

The longer the distance from the light source, the smaller the light intensity. According to the above-described embodiment, as illustrated in <FIG>, the longest distance L1 between the first light emitting element <NUM> and the first region <NUM> is shorter than the shortest distance L2 between the second light emitting element <NUM> and the first region <NUM>. This makes, even in a case where the first light emitting element <NUM> and the second light emitting element <NUM> emit light having approximately the same light emission intensity, light reaching the first region <NUM> from the first light emitting element <NUM> larger in illuminance than light reaching the first region <NUM> from the second light emitting element <NUM>. This allows the light emission color of the first light emitting element <NUM> to be clearly indicated in the first region <NUM>.

According to the above-described embodiment, the first region <NUM> is partially covered with the light-shielding part <NUM> of the front cover <NUM>, so that the first region <NUM> is partially shielded from light. Accordingly, the part illuminated by the first light emitting element <NUM> and the second light emitting element <NUM> and the part shielded from light by the light-shielding part <NUM> are positioned adjacent to each other in the first region <NUM>. This makes the indicated part in the first region <NUM> clear.

According to the above-described embodiment, as illustrated in <FIG>, the light-shielding part <NUM> of the front cover <NUM> is disposed at the position corresponding to the indicating part <NUM> serving as the operation part of the operation switch <NUM>, so that the light-shielding part <NUM> allows the user to clearly recognize the position of the indicating part <NUM>.

According to the above-described embodiment, the first region <NUM> irradiated with the light emitted from the first light emitting element <NUM> is higher in average illuminance than the first region <NUM> irradiated with the light emitted from the second light emitting element <NUM>, so that the light emission color of the first light emitting element <NUM> can be clearly indicated in the first region <NUM>.

According to the above-described embodiment, the light emission mode of the indicating device <NUM> changes in accordance with the operating mode of the air conditioner, so that the user can easily recognize the operating mode of the air conditioner. Further, for example, changing a light emission pattern or a light emission color as the light emission mode allows an increase in visibility of the indicating part <NUM>.

According to the above-described embodiment, the air conditioner is of a floor-standing type, but the present invention is not limited to the embodiment, and the air conditioner may be of another type such as a wall-mounted type, for example.

Claim 1:
An indicating device (<NUM>) comprising:
a first light emitting element (<NUM>);
a second light emitting element (<NUM>) capable of emitting light different in light emission color from light emitted from the first light emitting element (<NUM>);
an indicating part (<NUM>) that is translucent and is irradiated with the light emitted from the first light emitting element (<NUM>) and the light emitted from the second light emitting element (<NUM>); and
a partition wall (<NUM>) provided between the first light emitting element (<NUM>) and the second light emitting element (<NUM>), wherein
a first distance (d1) between the partition wall (<NUM>) and the first light emitting element (<NUM>) is shorter than a second distance (d2) between the partition wall (<NUM>) and the second light emitting element (<NUM>), and
the indicating part (<NUM>) and the partition wall (<NUM>) are arranged at a distance from each other;
characterized in that the indicating part (<NUM>) includes
a first region (<NUM>) that is irradiated with the light emitted from the first light emitting element (<NUM>) and the light emitted from the second light emitting element (<NUM>), and
a second region (<NUM>) that is irradiated with the light emitted from the second light emitting element (<NUM>) and not irradiated with the light emitted from the first light emitting element (<NUM>).