DE112019004491T5 - Field of view display device - Google Patents

Abstract

A head-up display device adapted for a vehicle and configured to display an image comprises: a plurality of light sources (201) configured to emit a display light for displaying the image; and a passage formation portion (22) that forms an air passage (22a) that guides air discharged from an air conditioning unit (12) configured to air-condition a vehicle cabin. The field of view display device further comprises a heat emitting element (30) coupled to the plurality of light sources (201) in a manner that enables heat to be transferred from the plurality of light sources (201) to the heat emitting element (30). The heat emitting element (30) is configured to emit the heat of the plurality of light sources (201) to the air in the air passage (22a). The heat releasing member (30) has a configuration for increasing an amount of heat released to the air toward a downstream side in a flowing direction of the air in the air passage (22a).

Description

Cross-reference to the associated registration

This application is based on and incorporated by reference Japanese Patent Application No. 2018-168270 filed on September 7, 2018.

Technical area

The present disclosure relates to a head-up display device (head-up display device) for a vehicle.

State of the art

As a field of view display device of this type, for example, a field of view display device described in Patent Literature 1 is known. The field of view display device of Patent Literature 1 includes a heat emitting element that emits heat from a display unit that emits light along with heat. The heat emitting element is arranged in a second air passage that branches off from a first air passage that supplies air blown from an air conditioning device into a vehicle cabin. With such an arrangement of the heat emitting member, the display unit of the field of view display device is cooled by the air of the air conditioning device through the heat radiating member.

Citation list

Patent literature

Patent Literature 1: JP 2015-157575A

Summary of the invention

As the head-up display device (hereinafter also referred to as a HUD device), there is a head-up display device comprising a plurality of light sources each of which is formed by a light emitting diode (i.e., LED). In a case where the light sources are cooled by the air (cooling air) in this HUD device, the cooling air absorbs the heat from the light sources, thereby increasing the temperature of the cooling air as the cooling air moves toward the downstream side flows. More specifically, if the light sources are air-cooled without ingenuity, some of the light sources located in a downstream area are less likely to be air-cooled and thereby tend to become hot.

When the temperature of the light source such as the LED is reduced, a greater amount of electric current can be passed through the light source to increase the brightness of the light source. However, if the temperatures of the light sources differ from one another as a function of the locations of the light sources, the degrees of brightness of the light sources can differ from one another due to the temperature differences between the light sources. This means that the degrees of brightness of the light sources differ. In order to limit the deviation in the degree of brightness among the light sources, the light sources must be uniformly cooled.

In addition, when the light sources are electrically connected in series, the electric current values of the light sources become equal to each other. However, the electric current value of the respective light sources is determined by the hottest light source that has the highest temperature among the light sources (i.e., the light source that has the worst degree of cooling). For this reason, too, it is important to uniformly cool the light sources in order to limit the temperature deviation among the light sources. As a result of an in-depth study by the inventors, the above-described point has been found.

Patent Literature 1 described above shows the technique of cooling the light sources by the air discharged from the air conditioning device (in other words, an air conditioner), but does not show a technique of unitarily cooling the light sources.

In view of the above, it is an object of the present disclosure to provide a head-up display device that can limit a temperature variation among a plurality of light sources caused by cooling the plurality of light sources by air discharged from an air conditioning unit.

• eine Vielzahl von Lichtquellen, die eingerichtet ist, ein Anzeigelicht zum Anzeigen des Bildes zu emittieren;
• einen Durchlassausbildungsabschnitt, der einen Luftdurchlass ausbildet, der Luft leitet, die aus einer Klimatisierungseinheit ausgegeben wird, die eingerichtet ist, eine Fahrzeugkabine zu klimatisieren; und
• ein Wärmeabgabeelement, das mit der Vielzahl von Lichtquellen in einer Weise gekoppelt ist, die eine Wärmeübertragung von der Vielzahl von Lichtquellen auf das Wärmeabgabeelement ermöglicht, wobei das Wärmeabgabeelement eingerichtet ist, die Wärme der Vielzahl von Lichtquellen an die Luft in dem Luftdurchlass abzugeben, wobei:
  • das Wärmeabgabeelement eine Konfiguration zum Erhöhen einer Wärmemenge hat, die an die Luft in Richtung einer stromabwärtigen Seite in einer Strömungsrichtung der Luft in dem Luftdurchlass abgegeben wird.

In order to achieve the object described above, according to one aspect of the present disclosure, there is provided a head-up display device that is for a vehicle and is configured to display an image. The field of view display device comprises:

• a plurality of light sources configured to emit a display light for displaying the image;
• a passage formation portion that forms an air passage that guides air discharged from an air conditioning unit configured to air-condition a vehicle cabin; and
• a heat emitting element coupled to the plurality of light sources in a manner that enables heat transfer from the plurality of light sources to the heat emitting element, the heat emitting element configured to release the heat of the plurality of light sources to the air in the air passage, wherein:
  • the heat releasing member has a configuration for increasing an amount of heat released to the air toward a downstream side in a flowing direction of the air in the air passage.

Here, in a case where the air in the air passage absorbs the heat from the heat releasing member and flows into the air passage, the temperature of the air increases from the upstream side toward the downstream side in the flow direction of the air in the air passage. On the other hand, as described above, the heat releasing member has the configuration to increase the amount of heat released to the air toward the downstream side in the flowing direction of the air in the air passage.

Thus, it is possible to reduce the tendency that the air in the air passage is less able to absorb the heat due to the increase in the temperature of the air on the downstream side in the flow direction of the air in the air passage. Therefore, it is possible to limit the temperature deviation among the light sources caused by the cooling of the light sources by the air supplied from the air conditioning unit.

• eine Vielzahl von Lichtquellen, die eingerichtet ist, ein Anzeigelicht zum Anzeigen des Bildes zu emittieren;
• einen Durchlassausbildungsabschnitt, der einen Luftdurchlass ausbildet, der Luft leitet, die aus einer Klimatisierungseinheit ausgegeben wird, die eingerichtet ist, eine Fahrzeugkabine zu klimatisieren; und
• ein Wärmeabgabeelement, das mit der Vielzahl von Lichtquellen in einer Weise gekoppelt ist, die eine Wärmeübertragung von der Vielzahl von Lichtquellen auf das Wärmeabgabeelement ermöglicht, wobei das Wärmeabgabeelement eingerichtet ist, die Wärme der Vielzahl von Lichtquellen an die Luft in dem Luftdurchlass abzugeben, wobei:
  • das Wärmeabgabeelement eine Wärmeabgabeneigungsfläche umfasst, wobei die Wärmeabgabeneigungsfläche in dem Luftdurchlass freiliegt und sich von einer stromaufwärtigen Seite in Richtung einer stromabwärtigen Seite in einer Strömungsrichtung der Luft in dem Luftdurchlass erstreckt; und
  • die Wärmeabgabeneigungsfläche bezüglich einer Durchlasserstreckungsrichtung, in der sich der Luftdurchlass erstreckt, so gekippt ist, dass die Wärmeabgabeneigungsfläche in Richtung der stromaufwärtigen Seite in der Strömungsrichtung der Luft in dem Luftdurchlass zeigt.

According to another aspect of the present disclosure, there is provided a head-up display device that is for a vehicle and is configured to display an image. The field of view display device comprises:

• a plurality of light sources configured to emit a display light for displaying the image;
• a passage formation portion that forms an air passage that guides air discharged from an air conditioning unit configured to air-condition a vehicle cabin; and
• a heat emitting element coupled to the plurality of light sources in a manner that enables heat transfer from the plurality of light sources to the heat emitting element, the heat emitting element configured to release the heat of the plurality of light sources to the air in the air passage, wherein:
  • the heat release member includes a heat release slope surface, the heat release slope surface being exposed in the air passage and extending from an upstream side toward a downstream side in a flowing direction of the air in the air passage; and
  • the heat releasing inclined surface is tilted with respect to a passage extending direction in which the air passage extends so that the heat releasing inclined surface faces toward the upstream side in the flow direction of the air in the air passage.

Therefore, compared to a case where the heat releasing inclined surface is parallel to the passage extending direction and therefore not tilted with respect to the passage extending direction, the air that has previously flowed through an area located along and upstream of the heat releasing inclined surface can is objectionable to some extent, more easily contacting a downstream portion of the heat releasing slope surface. More specifically, the air that has not yet received much heat from the upstream part of the heat releasing slope surface can more easily contact the downstream part of the heat releasing slope surface.

Therefore, it is possible to reduce the tendency that the air in contact with the heat releasing surface becomes hotter toward the downstream side in the flow direction of the air in the air passage. Therefore, it is possible to limit the temperature deviation among the light sources caused by the cooling of the light sources by the air supplied from the air conditioning unit.

• eine Vielzahl von Lichtquellen, die eingerichtet ist, ein Anzeigelicht zum Anzeigen des Bildes zu emittieren;
• einen Durchlassausbildungsabschnitt, der einen Luftdurchlass ausbildet, der Luft leitet, die aus einer Klimatisierungseinheit ausgegeben wird, die eingerichtet ist, eine Fahrzeugkabine zu klimatisieren; und
• ein Wärmeabgabeelement, das mit der Vielzahl von Lichtquellen in einer Weise gekoppelt ist, die eine Wärmeübertragung von der Vielzahl von Lichtquellen auf das Wärmeabgabeelement ermöglicht, wobei das Wärmeabgabeelement eingerichtet ist, die Wärme der Vielzahl von Lichtquellen an die Luft in dem Luftdurchlass abzugeben, wobei:
  • die Vielzahl von Lichtquellen in einer Lichtquellenreihenrichtung nacheinander angeordnet ist, die von einer stromaufwärtigen Seite in Richtung einer stromabwärtigen Seite in einer Strömungsrichtung der Luft in dem Luftdurchlass gerichtet ist;
  • das Wärmeabgabeelement Folgendes umfasst:
    • eine stromaufwärtsseitige Wärmeabgabelamelle, die in den Luftdurchlass vorsteht und sich in der Lichtquellenreihenrichtung erstreckt;
    • eine stromabwärtsseitige Wärmeabgabelamelle, die auf der stromabwärtsseitigen Seite der stromaufwärtsseitigen Wärmeabgabelamelle in der Strömungsrichtung der Luft in dem Luftdurchlass angeordnet ist, wobei die stromabwärtsseitige Wärmeabgabelamelle in den Luftdurchlass vorsteht und sich in einer Lichtquellenreihenrichtung erstreckt; und
    • eine Luftstromführung, die in dem Luftdurchlass angeordnet ist; und die Luftstromführung Seite an Seite bezüglich der stromabwärtsseitigen Wärmeabgabelamelle angeordnet ist, wobei die Luftstromführung eingerichtet ist, die Luft, die vorher durch einen Bereich geströmt ist, der entlang der stromaufwärtsseitigen Wärmeabgabelamelle in dem Luftdurchlass angeordnet ist und von dieser beanstandet ist, in Richtung der stromabwärtsseitigen Wärmeabgabelamelle zu führen und abzulenken.

According to another aspect of the present disclosure, there is provided a head-up display device that is for a vehicle and is configured to display an image. The field of view display device comprises:

• a plurality of light sources configured to emit a display light for displaying the image;
• a passage formation portion that forms an air passage that guides air discharged from an air conditioning unit configured to air-condition a vehicle cabin; and
• a heat emitting element coupled to the plurality of light sources in a manner that enables heat transfer from the plurality of light sources to the heat emitting element, the heat emitting element is configured to dissipate the heat of the plurality of light sources to the air in the air passage, wherein:
  • the plurality of light sources are sequentially arranged in a light source row direction directed from an upstream side toward a downstream side in a flowing direction of the air in the air passage;
  • the heat emitting element comprises:
    • an upstream side heat releasing fin that protrudes into the air passage and extends in the light source row direction;
    • a downstream side heat releasing fin disposed on the downstream side of the upstream side heat releasing fin in the flowing direction of the air in the air passage, the downstream side heat releasing fin protruding into the air passage and extending in a light source row direction; and
    • an air flow guide disposed in the air passage; and the airflow guide is arranged side by side with respect to the downstream-side heat dissipation fin, the airflow guide being configured to direct the air that has previously flown through an area that is arranged along and spaced from the upstream-side heat dissipation fin in the air passage toward the downstream side To guide and deflect heat dissipation lamella.

Thus, compared to a case where the air flow guide is not provided, the air that has previously flowed through the area disposed along the upstream side heat releasing fin and spaced to some extent therefrom, the downstream heat releasing fin due to the air flow through the air flow guide. More specifically, the air that has not yet received much heat from the upstream-side heat releasing fins can more easily contact the downstream-side heat releasing fins.

Therefore, it is possible to reduce a temperature difference between the temperature of the air contacting the upstream side heat releasing fin and the temperature of the air contacting the downstream side heat releasing fin. Thus, it is possible to limit the temperature deviation among the light sources caused by the cooling of the light sources by the air supplied from the air conditioning unit.

As described above, any of the head-up display devices of the above-described aspects can limit the temperature variation among the plurality of light sources caused by cooling the plurality of light sources by the air discharged from the air conditioning unit.

The reference numerals in parentheses attached to each component or the like show an example of the correspondence between the component and the specific component described in the embodiments that will be described below.

Figure list

• 1 Fig. 13 is a schematic structural diagram showing an air conditioning unit, an HUD device, and peripheral components of the HUD device according to a first embodiment.
• 2 Fig. 13 is a sectional view schematically showing the HUD device of the first embodiment.
• 3 FIG. 3 is a sectional view taken along a line III-III in FIG 2 .
• 4th FIG. 4 is a sectional view taken along a line IV-IV in FIG 3 .
• 5 FIG. 13 is a sectional view schematically showing a HUD device of a second embodiment and FIG 2 corresponds to.
• 6th FIG. 6 is a sectional view taken along a line VI-VI in FIG 5 and corresponds 3 .
• 7th FIG. 13 is a sectional view schematically showing a HUD device of a third embodiment and FIG 2 corresponds to.
• 8th FIG. 8 is a sectional view taken along a line VIII-VIII in FIG 7th corresponds to 3 .
• 9 FIG. 13 is a sectional view schematically showing a HUD device of a fourth embodiment, and FIG 2 corresponds to.

Description of embodiments

Each of the embodiments will be described below with reference to the drawings. In each of the following embodiments, parts that are the same or equivalent to each other are denoted by the same reference numerals in the drawings.

(First embodiment)

A field of view display device 10 of the present embodiment is an apparatus for a vehicle and displays an image visually recognized by an occupant on a front windshield of the vehicle. The image shown by the field of view display device 10 is displayed includes, for example, information relating to vehicle travel.

How 1 is shown, the vehicle that has the head-up display device 10 (hereinafter also referred to as a HUD device 10 designated) has an air conditioning unit 12th for air conditioning the vehicle cabin, in addition to the HUD device 10 . The HUD device 10 and the air conditioning unit 12th are installed in an interior of an instrument panel arranged on the vehicle cabin, for example. 1 shows a partial sectional view of the air conditioning unit 12th and the air conditioning duct 14th .

The air conditioning unit 12th includes a fan 121 , an air conditioning case 122 , an evaporator 123 and a heating means core 124 . The blower 121 sucks the air from an inside or an outside of the vehicle cabin and blows the sucked air.

A single internal passage 122a that is the air coming from the blower 121 is blown, conducts, is in an interior of the air conditioning housing 122 educated. The air conditioning housing 122 forms an outer shell of the air conditioning unit 12th out. Thus is the unit interior passage 122a a passage in the interior of the air conditioning unit 12th .

The evaporator 123 and the heating means core 124 are at the unit interior passage 122a arranged. More precisely, the evaporator 123 and the heating means core 124 are in the air conditioning housing 122 recorded. The evaporator 123 is a cooling device that cools air in the unit interior passage 122a flows. The evaporator 123 a refrigerant evaporates and cools the air by exchanging heat between the air and the refrigerant.

The heating element core 124 is on a downstream side of the evaporator 123 in the flow direction of the air in the unit interior passage 122a arranged. The heating element core 124 is a heating device that heats the air coming out of the evaporator 123 in the unit interior passage 122a is issued. The heating element core 124 heats the air with the heat from the engine coolant by exchanging the heat between the air and the engine coolant.

In addition, the unit includes inside passage 122a a warm air passage 122c as well as a bypass passage 122d on the downstream side of the evaporator 123 in the direction of air flow. The warm air passage 122c directs the air through the heating element core 124 , and the bypass passage 122b directs the air while holding the heating element core 124 bypasses. Also includes the air conditioning housing 122 a plurality of discharge ports located on the downstream side of the warm air passage 122c and the bypass passage 122d are arranged in the flow direction of the air, and with the unit inside passage 122a is connected. The discharge ports include, for example, a plurality of face discharge ports, a plurality of defrost discharge ports, and a plurality of foot discharge ports. In 1 are some of the discharge ports as discharge ports 122b displayed.

The air conditioning unit 12th , which is constructed in the manner described above, sucks the air from inside or outside the vehicle cabin by using the blower 121 operates, and adjusts the temperature of the sucked air by setting an opening degree of the warm air passage 122c and / or an opening degree of the bypass passage 122d increased or decreased. The air conditioning unit 12th ejects the air-conditioning air at the set temperature from one or more of the discharge ports that are the discharge ports 122b include, into the vehicle cabin, as indicated by arrows ARa. In this way, the air-conditioning unit air-conditioning 12th the vehicle cabin.

Each of the discharge ports of the air conditioning case 122 is connected to a corresponding air conditioning duct, and wherein the air conditioning air discharged from each of the discharge ports is blown into the vehicle cabin after having passed through the corresponding air conditioning duct. More precisely, the vehicle has a plurality of air conditioning ducts, the number of which corresponds to the number of discharge openings of the air conditioning unit 12th corresponds to.

1 shows an air conditioning duct 14th as one of the air conditioning channels. More specifically, an inlet end of the air conditioning duct 14th the 1 that is an upstream end of the air conditioning duct 14th in the flow direction of the air is with a corresponding one of the discharge outlets of the air conditioning unit 12th connected. An outlet end of the air conditioning duct 14th that is a downstream end of the air conditioning duct 14th is in the flow direction of the air is open at a predetermined point of the vehicle cabin.

There is also a canal passage 14a extending from the inlet end to the outlet end of the air conditioning duct 14th extends, on the inside of the air conditioning duct 14th educated. Therefore the channel passage serves 14a as an air passage that the air conditioning air coming out of the air conditioning unit 12th is ejected, leads to the predetermined location in the vehicle cabin.

In the present embodiment, the inlet end is the air conditioning duct 14th connected to the corresponding face discharge port among the discharge ports. The outlet end of the air conditioning duct 14th is connected to the corresponding face discharge outlet, which is arranged on a side surface of the instrument panel in the vehicle cabin, and wherein the air conditioning duct 14th is open to the vehicle cabin through the face discharge outlet. Therefore, in the present embodiment, the predetermined location of the vehicle cabin described above is a vehicle front side portion of the vehicle cabin where the face discharge outlet is open.

As in 1 and 2 shown includes the HUD device 10 a light source unit 20th , a passage formation section 22nd , an input line 24 , an output line 26th and a heat emitting element 30th .

The light source unit 20th includes components associated with an image display. More precisely, as in 2 shown comprises the light source unit 20th for example a variety of light sources 201 , a variety of lenses 202 as well as a display element 204 .

Any of the light sources 201 is a light-emitting element, more precisely, a light-emitting diode (LED) that emits light when it is energized. More precisely, the light sources 201 emit display light for displaying the image. Moreover, when the light sources 201 emit the light, generate the light sources 201 Warmth.

The display element 204 is, for example, a transmission TFT liquid crystal display panel.

In the HUD device, the indicator light comes from the light sources 201 is emitted through the lenses 202 and then passes through the indicator 204 . By having the indicator light through the indicator element 204 occurs, it becomes possible to change the picture of the display element 204 to represent. The indicator light emitted by the indicator 204 falls on the front windshield. Then, the incident display light is reflected by the front windshield serving as a transmission / reflection surface, and thereby the image formed by the display light is displayed as a virtual image formed on the vehicle front side of the front windshield, and by is recognizable to the occupants.

The passage formation section 22nd is on one of the light sources 201 arranged opposite side, which is opposite to a side on which the display light from the light sources 201 is emitted, and wherein the passage formation portion 22nd the light sources 201 is adjacent. A cooling air passage 22a is on an inside of the passage formation section 22nd educated. The cooling air passage 22a is an air passage that allows the cooling air to cool the light sources 201 conducts and extends in a passage extension direction DRc. The cooling air passage 22a has an inlet end 22b at an upstream end of the cooling air passage 22a in the direction of flow of the air, as well as an outlet end 22c at a downstream end of the cooling air passage 22a in the direction of air flow.

The input line 24 , the passage formation section 22nd and the output line 26th are connected in series in that order. The input line 24 , the passage formation section 22nd and the output line 26th are as a pipe element 28 formed in one piece in one piece. All or part of the tubular element 28 is formed, for example, by an easily bendable bellows hose. More precisely, at least a portion of the tubular element 28 has a flexibility.

As in the 1 and 2 is shown has the input line 24 an inlet end 241 at an upstream end of the upstream line 24 in the direction of air flow. The inlet end 241 the input line 24 is with a cold air flow section 122e of the unit internal passage 122a connected, the cold air flow section 122e on an upstream side of the evaporator 123 is arranged in the direction of flow of the air and the air (ie, cold air) passing through the evaporator 123 is cooled, conducts. More precisely, the air that passes through the evaporator 123 Is cooled is the cold air that passes through the heating element core 124 has not been heated, so that the cold air has a temperature that is lower than the temperature of the air that has not yet entered the evaporator 123 has streamed. Also, in the present embodiment, is the cold air flow portion 122e a portion of the unit interior passage 122a that is on the downstream side of the evaporator 123 is arranged in the flow direction of the air and on the upstream side of the heating means core 124 is arranged in the direction of flow of the air.

Therefore, the inlet-side air passage connects 24a , which is formed in the inlet-side duct, the cold air flow section 122e of the unit internal passage 122a and the inlet end 22b of the cooling air passage 22a . More accurate said the inlet end 22b of the cooling air passage 22a is with the cold air flow section 122e through the air outlet on the inlet side 24a connected. In addition, the upstream line conducts 24 the air that is the cold air (air conditioning wind) coming out of the air conditioning unit 12th is discharged to the cooling air passage 22a . Therefore, the cooling air passage conducts 22a the air (ie, the cold air) coming out of the air conditioning unit 12th is expelled.

The line on the output side 26th has an outlet end 261 that is a downstream end of the output-side pipe 26th is in the direction of flow of the air, and where the outlet end 261 with the channel passage 14a connected is. Therefore, the output side conduit passage connects 26a , the one in the line on the output side 26th is designed that outlet end 22c of the cooling air passage 22a and the channel passage 14a . More precisely, the outlet end 22c of the cooling air passage 22a is with the canal passage 14a through the line outlet on the output side 26a connected.

As in the 2 and 3 is the heat emitting element 30th with the light sources 201 coupled and emits the warmth of the light sources 201 to the air in the cooling passage 22a from. For this reason, the heat emitting element comprises 30th a heat dissipation plate 301 and a variety of heat dissipation fins 302 . The heat emitting element 30th is made of a metal such as aluminum alloy, which has good thermal conductivity. For example, the heat dissipation plate 301 and the heat dissipation fins 302 each made of the metal such as the aluminum alloy, and are integrally formed in one piece.

The heat dissipation plate 301 of the heat emitting element 30th is formed in a plate shape (more specifically, a plane plate shape) extending in the passage extending direction DRc. The heat dissipation plate 301 has an area 301a that with the light sources 201 is coupled, and the other face 301b , with the other face 301b the one surface 301a is opposite.

The light sources 201 are along one surface 301a the heat dissipation plate 301 from the upstream side to the downstream side in the flow direction of the air into the cooling air passage 22a arranged one after the other. In other words, the light sources 201 are sequentially arranged in a light source row direction DRd that is a direction that is from the upstream side toward the downstream side in the flow direction of the air in the cooling air passage 22a is directed. For example, there is a plurality of rows of the light sources 201 formed, the light sources 201 are sequentially arranged in each row in the light source row direction DRd. Any of the light sources 201 is on one surface 301a the heat dissipation plate 301 fixed in a state in which the light source 201 from the heat dissipation plate 301 is electrically isolated. In the present embodiment, the light source row direction DRd is parallel to the transmission extending direction DRc.

As in the 2 and 4th is shown although the heat dissipation plate 301 part of the heat emitting element 30th is, is the heat dissipation plate 301 also in the passage formation section 22nd included to part of the passage formation section 22nd to train. The other face 301b the heat dissipation plate 301 forms a passage wall surface that is in the cooling air passage 22a exposed. In 4th are components of the light source unit 20th by the light sources 201 are different, not shown for the sake of simplicity.

As in the 2 and 4th is shown, each of the heat releasing fins is standing 302 of the heat emitting element 30th from the other face 301b the heat dissipation plate 301 into the cooling air passage 22a in front. Therefore, each of the heat releasing fins is 302 in the cooling air passage 22a exposed. Also, each of the heat releasing fins is 302 designed so that the heat dissipation lamella 302 extends in the light source row direction DRd. In the present embodiment, for example, each of the heat releasing fins extends 302 along an entire extent of the heat dissipation plate 301 in the light source row direction DRd. Hence are places of light sources 201 in the light source row direction DRd all in an area passed through the heat releasing fins 302 is occupied in the light source row direction DRd.

Each of the heat releasing fins 302 has a base end 302a that with the other face 301b the heat dissipation plate 301 is coupled. In addition, at least one of the light sources is 201 placed at a point that is the base end 302 the corresponding heat dissipation lamella 302 in a thickness direction DRe of the heat releasing plate 301 overlaps.

In the present embodiment, all of the respective light sources are 201 belonging to one of two rows of light sources, arranged at a point that is the base end 302a from one of two heat dissipation fins 302 in the thickness direction DRe of the heat releasing plate 301 overlaps. Also, all of the appropriate light sources are 201 belonging to the other of the two rows of light sources are arranged at a position that is the base end 302a the other of the two heat dissipation fins 302 in the thickness direction DRe of the heat releasing plate 301 overlaps.

Besides, how 2 as shown, a protrusion height Hfn of each of the heat releasing fins increases 302 that from the other face 301b the heat dissipation plate 301 is measured from, progressively from the upstream side toward the downstream side in the flow direction of the air in the cooling air passage 22a . Therefore, the heat emitting element has 30th a variable heat release configuration for increasing an amount of heat generated by the heat release element 30th to the air of the cooling air passage 22a along a length of the heat emitting element 30th is discharged from the upstream side toward the downstream side in the flow direction of the air. More specifically, the variable heat release configuration is a configuration for increasing a heat release area Ahr of the heat release member 30th , which is an area for releasing the heat to the air of the cooling air passage 22a along the heat emitting element 30th from the upstream side toward the downstream side.

In the present case, the heat release region is Ahr of the heat release element 30th , in other words, an exposed area of a surface of the heat emitting element 30th that is in the cooling air passage 22a is exposed. Therefore, in the present embodiment, the heat releasing area is Ahr of the heat releasing element 30th a sum of an area of the other area 301b the heat dissipation plate 301 as well as the surfaces of the heat dissipation lamellas 302 .

In addition, “the configuration for increasing the heat releasing area Ahr of the heat releasing member is 30th toward the downstream side in the flow direction of the air in the cooling air passage 22a ″ described above, more specifically, as follows. More specifically, this configuration is a configuration for increasing the heat releasing area Ahr of the heat releasing member 30th toward the downstream side in the flow direction of the air into the cooling air passage 22a , wherein the heat release region Ahr of the heat release element 30th a heat release region of the heat release element 30th per unit length of the heat emitting element 30th is in the passage extension direction DRc.

Because such a heat emitting element 30th in the HUD device 10 is provided, a cooling of the light sources 201 the HUD device 10 through the heat emitting element 30th favored. Now is the cooling of the light sources 201 described in detail. As in 1 shown flows by operating the fan 121 the air conditioning unit 12th the air coming through the evaporator 123 is cooled from the unit internal passage 122a into the input line 24 as indicated by an arrow ARb.

As in 1 and 2 is shown, the air flows into the upstream duct 24 comes from the input line 24 to the cooling air passage 22a . Then, at the cooling air passage 22a , the air touches the heat dissipation plate 301 and the heat dissipation fins 302 and flows towards the outlet end 22c of the cooling air passage 22a . In doing so, the heat from the light sources 201 to the heat emitting element 30th guided so that the air that is in the cooling air passage 22a flows, the heat from the light sources 201 through the heat emitting element 30th receives, and thereby the light sources 201 be cooled.

The air drawn by the heat from the light sources 201 in the cooling air passage 22a is heated flows from the cooling air passage 22a into the line on the output side 26th . Then the air flows into the duct on the output side 26th comes from the line on the output side 26th into the canal passage 14a and becomes from the canal passage 14a Ejected into the vehicle cabin together with the air conditioning air passing through the duct passage 14a flows.

As described above, according to the present embodiment, as shown in FIG 2 shown is the HUD device 10 the heat emitting element 30th . The heat emitting element 30th is with the light sources 201 coupled in a way that allows a transfer of heat from the light sources 201 on the heat emitting element 30th allows, and wherein the heat dissipating element 30th the warmth of the light sources 201 to the air in the cooling air passage 22a gives away. In addition, the heat emitting element has 30th the configuration (ie, the variable heat release configuration) for increasing the amount of heat given to the air toward the downstream side in the flowing direction of the air in the cooling air passage 22a is delivered.

Presently, in the case where the air in the cooling air passage increases 22a the heat from the heat emitting element 30th receives and in the cooling air passage 22a the temperature of the air flows from the upstream side toward the downstream side in the flow direction of the air into the cooling air passage 22a . Regarding this point, as described above, the heat emitting member has 30th the variable heat release configuration for increasing the amount of heat given to the air toward the downstream side in the flow direction of the air in the cooling air passage 22a is delivered.

Therefore, it is possible to reduce the tendency for the air in the cooling air passage 22a the heat due to the increase in the temperature of the air on the downstream side in the flow direction of the air in the cooling air passage 22a less likely to pick up. Therefore, it is possible the temperature deviation among the light sources 201 to limit that by cooling the light sources 201 caused by the air coming out of the air conditioning unit 12th is fed. For example, it is possible to use the light sources 201 through the air in the cooling air passage 22a to cool uniformly, and thereby the temperature deviation among the light sources 201 to limit.

When the temperature deviation under the variety of light sources 201 is limited, it is possible to find color irregularity in the entire light sources 201 to eliminate that as the backlight of the display element 204 act. In addition, the input electric power becomes the light sources 201 increased so the brightness of the light sources 201 can be improved.

In addition, according to the present embodiment, the heat releasing configuration of the heat releasing member is variable 30th More specifically, the configuration for increasing the heat releasing area Ahr of the heat releasing member 30th toward the downstream side in the flow direction of the air in the cooling air passage 22ab. Therefore, the variable heat release configuration can be made by the external shape of the heat release member 30th can be easily implemented.

In addition, according to the present embodiment, are the light sources 201 arranged one after the other in the light source row direction DRd, which is the direction going from the upstream side toward the downstream side in the flow direction of the air in the cooling air passage 22a is directed. In addition, each of the heat releasing fins is standing 302 of the heat emitting element 30th from the other face (serving as the passage wall face) 301b of the heat releasing plate 301 into the cooling air passage 22a and extends in the light source row direction DRd. The protrusion height Hfn of each of the heat releasing fins 302 that from the other face 301b the heat dissipation plate 301 is measured increases along a length of the heat releasing fin 302 from the upstream side toward the downstream side in the flow direction of the air in the cooling air passage 22a to the heat release area Ahr of the heat release element 30th toward the downstream side in the flow direction of the air in the cooling air passage 22a to increase.

Thus, the configuration for increasing the heat releasing area Ahr of the heat releasing member can be made 30th toward the downstream side in the flow direction of the air in the cooling air passage 22a can be easily realized by adjusting the projection height Hfn of the corresponding heat dissipation fins 302 will be changed.

In addition, according to the present embodiment, the protrusion height Hfn of each of the heat releasing fins increases 302 that from the other face 301b the heat dissipation plate 301 is measured, increasing toward the downstream side in the flow direction of the air in the cooling air passage 22a . Therefore, there is a rapid change in the amount of heat exchange between the heat emitting element 30th and the air in the cooling air passage 22a limited, and it is thereby possible to use the light sources 201 to cool evenly.

In addition, according to the present embodiment, as shown in FIGS 2 to 4th is shown, at least one of the light sources 201 located at the point that the base end 302a the corresponding heat dissipation lamella 302 in the thickness direction DRe of the heat releasing plate 301 overlaps. Therefore, the heat from the light source 201 which is located at the point that forms the base end 302a the corresponding heat dissipation lamella 302 in the thickness direction DRe of the heat releasing plate 301 overlapped, on the heat dissipation lamella 302 simply transferred to cooling the light source 201 to favor.

In addition, according to the present embodiment, as shown in FIGS 1 and 2 is shown the inlet end of the cooling air passage 22a with the cold air flow section 122e in connection, the one on the downstream side of the evaporator 123 in the direction of flow of the air in the unit interior passage 122a is arranged and directs the air passing through the evaporator 123 is cooled. Therefore, the light sources 201 be cooled by the air passing through the evaporator 123 the air conditioning unit 12th is cooled. For example, it is possible to cool the light sources 201 compared to a case where the light sources favor 201 are cooled by the air conditioning air, the temperature of which, for example, by heating the air conditioning air with the heating element core 124 in the air conditioning unit 12th is set.

It also has the temperature of the cold air, which is the air that passes through the evaporator 123 is cooled, and to the cold air flow passage 122e flows lower than the temperature of the air conditioning air coming from the downstream side of the heating means core 124 in the direction of flow of the air in the air conditioning unit 12th emanates. The cold air coming through the evaporator 123 is cooled, is used for cooling the light sources 201 used immediately. Therefore, the brightness of the light sources 201 be improved. Further, in a case where the HUD device 10 becomes too hot before the time of starting the operation of the HUD device 10 , throttling (derating), which is a control mode for Delaying the start of the operation of the HUD device 10 is to be run to the electronic components of the HUD device 10 to protect. In the case where the throttling is carried out in this way, it is possible to obtain the required brightness of the light sources 201 to ensure at an early stage by shortening an execution period of throttling.

Furthermore, because the cold air coming through the evaporator 123 is cooled, for cooling the light sources 201 is used, it is possible to reduce a size of a cooling component such as a heat sink, a heat releasing sheet used for the cooling purpose, or it is possible to eliminate such a cooling component. As a result, there becomes a significant advantage in vehicle mountability, weight reduction, and cost reduction of the HUD device 10 expected.

In addition, according to the present embodiment, as shown in FIGS 1 and 2 shown is the air conditioning duct 14th provided that the channel passage 14a that has the air (air conditioning wind) coming out of the air conditioning unit 12th is output, leads to the predetermined location in the vehicle cabin. The outlet end 22c of the cooling air passage 22a is with the canal passage 14a connected. Hence the air that is used to make the light sources 201 to cool, can be used for air conditioning the vehicle cabin.

Also, according to the present embodiment, includes the HUD device 10 the input line 24 that is the air coming out of the air conditioning unit 12th is output to the cooling air passage 22a directs. Also includes the HUD device 10 the line on the output side 26th into which the air created by the heat of the light sources 201 in the cooling air passage 22a is heated from the cooling air passage 22a is entered. The input line 24 , the passage formation section 22nd and the output line 26th are connected in series to the tubular element 28 to train. Therefore, it is possible to reduce the number of seams in the air flow path extending from the upstream duct 24 to the line on the output side 26th extends, to reduce, and it is thereby possible to simply limit the escape of air.

In addition, according to the present embodiment, at least the portion of the tubular member has 28 the flexibility. Therefore, it is possible to use the tubular member 28 for cooling the light sources 201 easy to arrange.

(Second embodiment)

Next, a second embodiment will be described. In the present embodiment, differences different from the first embodiment described above are mainly described. In addition, description of the portions that are the same as or equivalent to those in the above-described embodiments will be omitted or simplified. This also applies to the description of the embodiments described below.

As in the 5 and 6th As shown, according to the present embodiment, is the length of each of the heat releasing fins 302 that is measured in the light source row direction DRd is reduced compared with the first embodiment.

More precisely, the location of the downstream end 302b from each of the heat releasing fins 102 in the direction of flow of the air into the cooling air passage 22a is the same as that of the first embodiment. However, it is the upstream end location 302c from each of the heat releasing fins 302 in the flow direction of the air in the cooling air passage 22a on a central part of the heat dissipation plate 301 is set in the light source row direction DRd unlike the first embodiment.

More specifically, a span of the heat releasing fin 302 , which is measured in the light source row direction DRd, overlaps a total span of the light sources 201 (ie, disposed therein) measured in the light source row direction DRd, and is toward the downstream side in the flow direction of the air in the cooling air passage 22a in terms of the total span of the light sources 201 decentered. Similarly, the span of the heat releasing fin overlaps 302 , measured in the light source row direction DRd, a span of the heat releasing plate 301 (ie, disposed therein) measured in the light source row direction DRd, and is toward the downstream side in the flow direction of the air in the cooling air passage 22a with respect to the span of the heat dissipation plate 301 decentered.

Other than the points described above, the rest of the present embodiment is the same as that of the first embodiment. In addition, the present embodiment can achieve the advantages obtained with the common structure that is the same as the first embodiment.

(Third embodiment)

Next, a third embodiment will be described. In the present embodiment, differences resulting from the the first embodiment described above are different.

As in the 7th and 8th shown comprises the heat dissipating element 30th In the present embodiment, a plurality of upstream side heat releasing fins 303 and a plurality of downstream heat releasing fins 304 than the heat dissipation fins that the heat dissipation fins 302 correspond to the first embodiment. In addition, the heat-emitting element comprises 30th of the present embodiment an air flow guide 305 . The present embodiment differs from the first embodiment in these points.

More specifically, the upstream side heat releasing fins 303 and the downstream side heat releasing fins 304 stand out from the other surface 301b the heat dissipation plate 301 into the cooling air passage 22a and extend in the light source row direction DRd. The downstream heat dissipation fins 304 are on the downstream side of the upstream side heat releasing fins 303 in the flow direction of the air in the cooling air passage 22a arranged, with a lamella-to-lamella gap 304a between each of the downstream side heat releasing fins 304 and a corresponding one of the upstream side heat releasing fins 303 is arranged. In the present embodiment, the number of the upstream side heat releasing fins is 303 two and is the number of the downstream side heat releasing fins 304 two. Thus, a total of four heat dissipation lamellas are provided.

Also has how 8th is shown, each of the upstream side heat releasing fins 303 an upstream end 303b on the upstream side in the flow direction of the air in the cooling air passage 22a as well as a downstream end 303c on the downstream side in the flow direction of the air in the cooling air passage 22a . Similarly, each of the downstream side heat releasing fins has 304 an upstream end 304b on the upstream side in the flow direction of the air in the cooling air passage 22a as well as a downstream end 304c on the downstream side in the flow direction of the air in the cooling air passage 22a .

A distance between the upstream ends 303b of the two upstream heat releasing fins 303 that is in a passage width direction DRf of the cooling air passage 22a is measured is a half of a total width Wa of the cooling air passage 22a . The two upstream heat release fins 303 are arranged symmetrically in the passage width direction DRf. Also are the two downstream heat releasing fins 304 arranged symmetrically in the passage width direction DRf. The passage width direction DRf of the cooling air passage 22a is a direction perpendicular to the passage extending direction DRc and along the other surface 301b the heat dissipation plate 301 extends.

The air flow guide 305 is parallel to the downstream heat releasing fins 304 in the cooling air passage 22a arranged. In addition, the airflow guide is 305 with respect to the downstream heat releasing fins 304 arranged side by side in the passage width direction DRf. More precisely, the air flow guide 305 is between the two downstream heat releasing fins 304 arranged so that a gap between the airflow guide 305 and each of the downstream side heat releasing fins 304 is arranged.

In addition, a peripheral portion is a downstream end of each upstream side heat releasing fin 303 that is the downstream end 303c comprises, curved outward in the passage width direction DRf. On the other hand, a peripheral portion is an upstream end of each downstream side heat releasing fin 304 that is the upstream end 304b comprises, curved inward in the passage width direction DRf. Also is the upstream end 304b from each downstream heat releasing fin 304 in the passage width direction DRf with respect to the downstream end 303c the upstream side heat releasing fin 303 shifted inward.

Therefore, the air flowing between the upstream side heat releasing fins 303 is arranged in the passage width direction DRf and along the upstream side heat releasing fins 303 flows, guided as indicated by an arrow ARc. More specifically, this air is passed through the upstream side heat releasing fins 303 and the downstream side heat releasing fins 304 guided so that the air is divided and to an outside of each of the downstream side heat releasing fins 304 is guided in the passage width direction DRf.

In addition, the air flow guide leads 305 the air that has previously passed through an area along the upstream side heat releasing fins 303 is arranged and is spaced from these, in a direction of an arrow ARd in the cooling air passage 22a has flowed toward the downstream heat releasing fins 304 and deflects them as indicated by arrows ARe.

Thus, compared with a case where the airflow guide 305 is absent, the air that has previously passed through the area along the upstream side heat releasing fins 303 and spaced from these to some extent, as indicated by arrow ARd, the downstream heat releasing fins 304 due to the air being guided through the air flow guide 305 easier to touch. More specifically, the air that hasn't received much heat from the upstream heat releasing fins 303 may have the downstream heat releasing fins 304 easier to touch.

Therefore, it is possible to detect a temperature difference between the temperature of the air that the upstream side heat releasing fin 303 and the temperature of the air that the downstream heat releasing fin 304 touches, reduce. Therefore, it is possible to check the temperature deviation among the light sources 201 to limit that by cooling the light sources 201 through the air coming out of the air conditioning unit 12th is supplied, is caused. For example, it is possible to use the light sources 201 through the air in the cooling air passage 22a to cool uniformly, and thereby the temperature deviation among the light sources 201 to limit.

In addition, in the present embodiment, as in FIGS 7th and 8th is shown, each of the upstream side heat releasing fins 303 a base end 303d that with the other face 301b the heat dissipation plate 301 is connected, and has each of the downstream side heat releasing fins 304 a base end 304d that with the other face 301b the heat dissipation plate 301 connected is. At least one of the light sources 201 is located at a point that is the base end 303d the corresponding upstream heat releasing fin 303 or the base end 304d the corresponding downstream heat releasing fin 304 in the thickness direction DRe of the heat releasing plate 301 overlaps.

Other than the points described above, the rest of the present embodiment is the same as that of the first embodiment. In addition, the present embodiment can achieve the advantages obtained with the common structure that is the same as the first embodiment.

(Fourth embodiment)

A fourth embodiment will next be described. In the present embodiment, differences different from the first embodiment described above are mainly described.

As in 9 is the light source unit 20th of the present embodiment with respect to the light source unit 20th the first embodiment tilted. The present embodiment differs from the first embodiment in this point.

More specifically, according to the present embodiment, although the light source row direction DRd is the direction from the upstream side toward the downstream side in the flowing direction of the air into the cooling air passage 22a is directed, the light source row direction DRd is tilted with respect to the transmission extension direction DRc. Hence the heat emitting element 30th arranged so that the heat dissipation plate 301 is tilted with respect to the passage extension direction DRc.

So the other face is 301b the heat dissipation plate 301 formed as a heat dissipation inclination surface in the cooling air passage 22a exposed and extending from the upstream side toward the downstream side in the flow direction of the air in the cooling air passage 22a extends. The other face 301b the heat dissipation plate 301 , which serves as the heat releasing inclination surface, is tilted with respect to the passage extending direction of the DRc so that the other surface 301b the upstream side in the flow direction of the air in the cooling air passage 22a opposite.

Therefore, compared with, for example, the case where the other face 301b the heat dissipation plate 301 is not tilted with respect to the passage extension direction of the DRc, and is thereby parallel to the passage extension direction DRc, the following points are noted. More specifically, compared with this case, the air that has previously passed through the area located along and spaced from the upstream part of the other surface (which is formed as the heat releasing inclination surface) 301b can be made to a certain degree, a downstream portion of the other face 301b easier to touch. In short, the air that has not received much heat from the upstream part of the other face 301b can take the downstream part of the other face 301b just touch it.

Therefore, it is possible to reduce the tendency that the air flowing with the other face 301b the heat dissipation plate 301 is in contact, toward the downstream side in the flow direction of the air in the cooling air passage 22a gets hotter. Therefore, it is possible to check the temperature deviation among the light sources 201 to limit that by cooling the light sources 201 caused by the air coming out of the air conditioning unit 12th is fed. For example, it is possible to use the light sources 201 through the air in the cooling air passage 22a to cool uniformly, and thereby the temperature deviation among the light sources 201 to limit.

Other than the points described above, the rest of the present embodiment is the same as that of the first embodiment. In addition, the present embodiment can achieve the advantages obtained with the common structure that is the same as the first embodiment.

Although the present embodiment is a modification of the first embodiment, it is also possible to combine this embodiment with the above-described second embodiment or third embodiment.

(Other embodiments)

1. (1) In each of the above-described embodiments, each of the light sources is 201 that for example 2 shown are the light emitting diode. However, the light source is 201 not necessarily limited to the light emitting diode and may be, for example, a light bulb.
2. (2) In each of the above-described embodiments, as in 2 is shown the light sources 201 physically separated from each other. However, the light sources are 201 not necessarily physically separated from each other. For example, it is only necessary to use the multitude of light sources 201 with regard to their function, and can use the light sources 201 be formed as an integrated structure which is formed in one piece.
3. (3) In each of the above-described embodiments, the air conditioning duct is 14th who is in 1 is shown the channel connecting the face ejection port and the face ejection outlet. However, this is an example. For example, the air conditioning duct 14th be a passage connecting the defrost discharge port among the plurality of discharge ports and the defrost discharge outlet opening to the vehicle cabin and facing toward the front windshield. Alternatively, the air conditioning duct 14th be a passage connecting the foot discharge port among the plurality of discharge ports and a foot discharge outlet that is open to a foot side of the occupant in the vehicle cabin.
4. (4) In the first embodiment described above, such as 3 shown is all of the light sources 201 the HUD device 10 arranged so that each of the light sources 201 is arranged at the corresponding location at which each of the light sources 201 the base end 302a the corresponding one of the plurality of heat releasing fins 302 in the thickness direction DRe of the heat releasing plate 301 overlaps. However, this is an example. For example, it is possible to have one or more of all of the light sources 201 is arranged at a location where one or more of all of the light sources 201 the base end 302a from one of the heat dissipation fins 302 in the thickness direction DRe of the heat releasing plate 301 not overlapped.
5. (5) In each of the above-described embodiments, such as in 2 is shown the other face 301b the heat dissipation plate 301 the passage wall surface that is in the cooling air passage 22a exposed. However, the other face must 301b the heat dissipation plate 301 not be the throat panel. For example, a passage wall between the heat dissipation plate 301 and the cooling air passage 22a is arranged and in the cooling air passage 22a exposed, be formed, and the heat dissipation fins 302 from the heat dissipation plate 301 into the cooling air passage 22a protrude through the passage wall.
6. (6) In each of the above-described embodiments, as in 1 shown is the cold air flow section 122e the section of the unit internal passage 122a that is on the downstream side of the evaporator 123 is arranged in the flow direction of the air, and on the upstream side of the heating means core 124 is arranged in the direction of flow of the air. However, this is an example. For example, the cold air flow passage can 122e be a section that is in the bypass passage 122d in the unit interior passage 122a is included. This is because the cold air does not pass through the heating element core 124 is heated, also in the bypass passage 122d flows.
7. (7) In the first embodiment described above, as in 2 shown is the variable heat release configuration of the heat release element 30th the configuration for increasing the heat releasing area Ahr of the heat releasing member 30th with respect to the air toward the downstream side in the flow direction of the air in the cooling air passage 22a . However, this is an example. For example can be the passage cross-sectional area of the cooling air passage 22a along a length of the cooling air passage 22a can be decreased from the upstream side toward the downstream side in the flow direction of the air, and the heat emitting member 30th be set up in such a cooling air passage 22a to be exposed. With this configuration, the flow rate of the air in the cooling air passage increases 22a from the upstream side toward the downstream side in the flow direction of the air in the cooling air passage 22a . Therefore, the heat exchange between the air and the heat emitting element increases 30th from the upstream side toward the downstream side in the flow direction of the air in the cooling air passage 22a so that even if the protrusion height Hfn of the heat releasing fin 302 is constant, the variable heat release configuration of the heat release element 30th is implemented. More specifically, assuming that the temperature of the air in the cooling air passage 22a at any point of the cooling air passage 22a is constant, the variable heat release configuration is only required to increase the amount of heat given to the air toward the downstream side in the flow direction of the air in the cooling air passage 22a is delivered. In addition, the configuration can reduce the passage cross-sectional area of the cooling air passage 22a toward the downstream side in the flow direction of the air, for example, by the shape of the passage formation portion 22nd or the shape of the heat emitting element 30th implemented.
8. (8) In the third embodiment described above, as in 8th shown is the lamella-to-lamella gap 304a between each of the upstream side heat releasing fins 303 and the corresponding one of the downstream side heat releasing fins 304 educated. However, this is an example. For example, the lamella-to-lamella gap 304a are eliminated, so that the upstream heat release fin 303 and the downstream side heat releasing fin 304 can be connected to each other
9. (9) In the third embodiment described above, increases as in FIG 7th and 8th is shown, the protrusion height Hfn (see 2 ) each of the upstream and downstream heat releasing fins 303 , 304 toward the downstream side in the flow direction of the air in the cooling air passage 22a . The above-described change in the protrusion height Hfn in the third embodiment is not essential. For example, in the third embodiment, the protrusion height Hfn of each of the upstream-side and downstream-side heat releasing fins may be 303 , 304 possibly along the length of the heat dissipation fin 303 , 304 from the upstream side toward the downstream side in the flow direction of the air into the cooling air passage 22a be constant. This is because of the effect as well as an advantage of limiting a temperature deviation among the light sources 201 by cooling the light sources 201 caused by the air coming out of the air conditioning unit 12th is supplied, also in this configuration with the air flow guide 305 can be achieved.
10. (10) In the fourth embodiment described above, as in 9 is shown the other face 301b the heat dissipation plate 301 the heat releasing slope area described above. However, the configuration should not be limited to this. For example, side surfaces of the heat dissipation lamellas 302 each be designed as the heat dissipation inclination surface.
11. (11) In the fourth embodiment described above, as in FIG 9 is shown, the protrusion height Hfn (see 2 ) from each of the heat dissipation fins 302 toward the downstream side in the flow direction of the air in the cooling air passage 22a as in the first embodiment. However, this is an example. The above-described change in the protrusion height Hfn in the fourth embodiment is not essential. For example, in the fourth embodiment, the protrusion height Hfn of each of the heat releasing fins may be 302 along the length of the heat release fin 302 from the upstream side toward the downstream side in the flow direction of the air in the cooling air passage 22a be constant. This is because there is an effect and an advantage of limiting the temperature variation among the light sources 201 by cooling the light sources 201 caused by the air coming out of the air conditioning unit 12th can also be achieved with this configuration. The above-described effect, and an advantage, are implemented by the other area 301b the heat dissipation plate 301 is formed as the heat releasing inclination surface described above.
12. (12) The present embodiment is not necessarily limited to the above embodiments, and it may Modifications of the above embodiments take place. Further, the above embodiments are not unrelated to each other and may be combined appropriately unless such combination is obviously impossible. In any of the foregoing embodiments, it goes without saying that the elements that make up the embodiments are not necessarily essential unless they are clearly described as essential or generally considered to be obviously essential.

In any of the above embodiments, when a numerical value such as a number, a numerical value, an amount, a range, or the like of each element of the exemplary embodiments is mentioned, the present disclosure should not be limited to such a numerical value as it unless it is clearly stated that this is essential and / or is fundamentally required. In any of the above embodiments, when reference is made to a material, shape, positional relationship, or the like of each element, the present disclosure should not be limited to such material, shape, positional relationship, or the like, except as it is clearly described that these are essential and / or are fundamentally required.

(Summary)

According to a first aspect, which is reproduced in one or more or all of the above embodiments, a heat emitting element is coupled to a plurality of light sources in a manner that enables a heat transfer from the plurality of light sources to the heat emitting element. The heat emitting element is configured to emit the heat of the plurality of light sources to the air in the air passage. The heat releasing member has a configuration to increase an amount of heat released to the air toward a downstream side in a flowing direction of the air into the air passage.

In addition, according to a second aspect, the configuration for increasing the amount of heat released to the air toward the downstream side in the flowing direction of the air in the air passage is a configuration for increasing a heat releasing area of the heat releasing member toward the downstream side in the flowing direction of FIG Air in the air passage, wherein the heat release region of the heat release element is an area for releasing the heat to the air in the air passage. Thus, the configuration for increasing the amount of heat released to the air toward the downstream side in the flow direction of the air in the air passage can be easily implemented with the external shape of the heat release member.

Furthermore, according to a third aspect, the plurality of light sources are sequentially arranged in a light source row direction which is a direction directed from an upstream side toward the downstream side in the flow direction of the air in the air passage. The heat releasing member includes a heat releasing fin that protrudes into the air passage from a passage wall surface exposed in the air passage, and extends in the light source row direction. A protrusion height of the heat releasing fin measured from the passage wall surface increases toward the downstream side in the flowing direction of the air in the air passage to increase the heat releasing area of the heat releasing member toward the downstream side in the flowing direction of the air in the air passage. Thus, the configuration for increasing the heat releasing area of the heat releasing member toward the downstream side in the flow direction of the air in the air passage can be easily implemented by changing the protrusion height of the heat releasing fin.

In addition, according to a fourth aspect, the protrusion height of the heat releasing fin increases increasingly toward the downstream side in the flow direction of the air in the air passage. Therefore, a rapid change in the amount of heat exchanged between the heat emitting element and the air in the air passage is restricted, and thereby it is possible to cool the plurality of light sources uniformly.

Furthermore, according to a fifth aspect, the heat release member includes a heat release slope surface, the heat release slope surface being exposed in the air passage and extending from an upstream side toward the downstream side in the flow direction of the air in the air passage. The heat release slope surface is tilted with respect to a passage extension direction in which the air passage extends so that the heat release slope surface faces toward the upstream side in the flow direction of the air in the air passage. This also applies to a sixth aspect.

In addition, according to a seventh aspect, the plurality of light sources are sequentially arranged in a light source row direction that is a direction directed from the upstream side toward the downstream side in the flow direction of the air in the air passage. The heat releasing member includes an upstream side heat releasing fin that protrudes into the air passage and extends in the light source row direction. The heat releasing member includes: a downstream side heat releasing fin disposed on the downstream side of the upstream side heat releasing fin in the flowing direction of the air in the air passage, the downstream side heat releasing fin protruding into the air passage and extending in the light source row direction; and an air flow guide arranged in the air passage. The airflow guide is arranged side by side with respect to the downstream-side heat dissipation fin, the airflow guide being configured to direct the air, which has previously flown through an area that is arranged along and spaced from the upstream-side heat dissipation fin in the air passage, toward the downstream-side heat dissipation fin to lead and distract. This also applies to an eighth aspect.

Furthermore, according to a ninth aspect, the heat releasing member includes: a heat releasing plate having one face coupled to the plurality of light sources and another face opposite to the one face; and a heat releasing fin protruding from the other surface of the heat releasing plate and exposed in the air passage. The heat releasing fin has a base end coupled to the other surface of the heat releasing plate. At least one of the plurality of light sources is arranged at a position that overlaps the base end of the heat releasing fin in a thickness direction of the heat releasing plate. Therefore, the heat of the light source disposed at the position overlapping the base end of the heat releasing fin in the thickness direction of the heat releasing plate can be easily transmitted to the heat releasing fin to promote cooling of the light source.

In addition, according to a tenth aspect, the air conditioning unit includes a cooling device configured to cool the air flowing in a unit interior passage in the air conditioning unit. The air passage includes an inlet end located at an upstream end of the air passage in the flow direction of the air in the air passage. The inlet end of the air passage communicates with a portion of the unit inside passage that is disposed on the downstream side of the cooling device in the flowing direction of the air and that guides the air cooled by the cooling device. Therefore, the plurality of light sources can be cooled by the air cooled by the cooling device of the air conditioning unit. Thus, it is possible to promote the cooling of the light sources compared with, for example, a case where the light sources are cooled by the air conditioning air, the temperature of which is set by heating the air conditioning air in the air conditioning unit, for example.

In addition, according to an eleventh aspect, the head-up display device includes an air conditioning duct that has a duct passage that guides the air discharged from the air conditioning unit to a predetermined location in the vehicle cabin. The air passage includes an outlet end at a downstream end of the air passage in the flow direction of the air in the air passage. The outlet end of the air passage is connected to the duct passage. Therefore, the air that is used to cool the light sources can be used for air conditioning the vehicle cabin.

In addition, according to a twelfth aspect, the head-up display device includes: an input-side duct that guides the air discharged from the air conditioning unit to the air passage; and an output side duct into which the air heated by the heat of the plurality of light sources in the air passage is input from the air passage. The input side pipe, the passage formation section, and the output side pipe are connected in series to form a pipe member. Therefore, it is possible to reduce the number of seams in the air flow path extending from the input-side duct to the output-side duct, and thereby it is possible to easily restrain the air from escaping.

In addition, according to a thirteenth aspect, at least a portion of the tubular member has flexibility. Therefore, it is possible to easily arrange the lead member for cooling the light sources.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• JP 2015157575 A [0004]

Claims (13)

A field of view display device for a vehicle, which is configured to display an image, the field of view display device comprising: a plurality of light sources (201) configured to emit a display light for displaying the image; a passage formation portion (22) that forms an air passage (22a) that guides air discharged from an air conditioning unit (12) configured to air-condition a vehicle cabin; and a heat emitting element (30) coupled to the plurality of light sources (201) in a manner that enables heat to be transferred from the plurality of light sources (201) to the heat emitting element (30), the heat emitting element (30) being configured to To dissipate heat from the plurality of light sources (201) to the air in the air passage (22a), wherein: the heat releasing member (30) has a configuration for increasing an amount of heat released to the air toward a downstream side in a flowing direction of the air in the air passage. Field of view display device according to Claim 1 wherein the configuration for increasing the amount of heat released to the air toward the downstream side in the flowing direction of the air in the air passage, a configuration for increasing a heat releasing area of the heat releasing member (30) toward the downstream side in the flowing direction of the air is in the air passage, wherein the heat releasing area of the heat releasing element (30) is an area for releasing the heat to the air in the air passage. Field of view display device according to Claim 2 wherein: the plurality of light sources (201) are sequentially arranged in a light source row direction (DRd) which is a direction directed from an upstream side toward the downstream side in the flow direction of the air in the air passage (22a); the heat releasing member (30) comprises a heat releasing fin (302, 303, 304) protruding from a passage wall surface (301b) exposed in the air passage (22a) into the air passage (22a) and extending in the light source row direction (DRd); and a protrusion height (Hfn) of the heat releasing fin (302, 303, 304) measured from the passage wall surface (301b) increases toward the downstream side in the flow direction of the air in the air passage (22a) by the heat releasing area of the heat releasing member (30) toward the downstream side in the flow direction of the air in the air passage (22a). Field of view display device according to Claim 3 wherein the protrusion height (Hfn) of the heat releasing fin (302, 303, 304) increases progressively toward the downstream side in the flow direction of the air in the air passage (22a). Field of view display device according to one of the Claims 1 to 4th wherein: the heat releasing member (30) includes a heat releasing slope surface (301b), the heat releasing slope surface (301b) being exposed in the air passage (22a) and extending from an upstream side toward the downstream side in the flow direction of the air in the air passage (22a). extends; and the heat releasing inclined surface (301b) is tilted with respect to a passage extending direction (DRc) in which the air passage (22a) extends so that the heat releasing inclined surface (301b) faces toward the upstream side in the flow direction of the air in the air passage (22a). A field of view display device for a vehicle, which is configured to display an image, the field of view display device comprising: a plurality of light sources (201) configured to emit a display light for displaying the image; a passage formation portion (22) that forms an air passage (22a) that guides air discharged from an air conditioning unit (12) configured to air-condition a vehicle cabin; and a heat emitting element (30) coupled to the plurality of light sources (201) in a manner that enables heat to be transferred from the plurality of light sources (201) to the heat emitting element (30), the heat emitting element (30) being configured to To dissipate heat from the plurality of light sources (201) to the air in the air passage (22a), wherein: the heat releasing member (30) comprises a heat releasing inclined surface (301b), the heat releasing inclined surface (301b) being exposed in the air passage (22a) and extending from an upstream side toward the downstream side in a flow direction of the air in the air passage (22a); and the heat releasing inclined surface (301b) is tilted with respect to a passage extending direction (DRc) in which the air passage (22a) extends so that the heat releasing inclined surface (301b) faces toward the upstream side in the flow direction of the air in the air passage (22a). Field of view display device according to Claim 1 or 2 wherein: the plurality of light sources (201) are sequentially arranged in a light source row direction (DRd) which is a direction directed from an upstream side toward the downstream side in the flow direction of the air in the air passage (22a); the heat releasing member (30) comprises: an upstream side heat releasing fin (303) protruding into the air passage (22a) and extending in the light source row direction (DRd); a downstream side heat releasing fin (304) arranged on the downstream side of the upstream side heat releasing fin (303) in the flow direction of the air in the air passage (22a), the downstream side heat releasing fin (304) protruding into the air passage (22a) and located in the Light source row direction (DRd) extends; and an air flow guide (305) disposed in the air passage (22a); and the airflow guide (305) is disposed side by side with respect to the downstream heat dissipation fin (304), the airflow guide (305) being configured to convey the air that has previously passed through an area along the upstream heat dissipation fin (303) in the air passage is arranged and spaced from this to guide and deflect in the direction of the downstream heat dissipation fin (304). A field of view display device for a vehicle, which is configured to display an image, the field of view display device comprising: a plurality of light sources (201) configured to emit a display light for displaying the image; a passage formation portion (22) that forms an air passage (22a) that guides air discharged from an air conditioning unit (12) configured to air-condition a vehicle cabin; and a heat emitting element (30) coupled to the plurality of light sources (201) in a manner that enables heat to be transferred from the plurality of light sources (201) to the heat emitting element (30), the heat emitting element (30) being configured to To dissipate heat from the plurality of light sources (201) to the air in the air passage (22a), wherein: the plurality of light sources (201) are sequentially arranged in a light source row direction (DRd) directed from an upstream side toward a downstream side in a flowing direction of the air in the air passage (22a); the heat emitting element (30) comprises: an upstream side heat releasing fin (303) protruding into the air passage (22a) and extending in the light source row direction (DRd); a downstream side heat dissipation fin (304) arranged on the downstream side of the upstream side heat dissipation fin (303) in the flow direction of the air in the air passage (22a), the downstream side heat dissipation fin (304) protruding into the air passage (22a) and located in the Light source row direction (DRd) extends; and an air flow guide (305) disposed in the air passage (22a); and the airflow guide (305) is arranged side by side with respect to the downstream heat dissipation fin (304), the airflow guide (305) being arranged to convey the air that has previously passed through an area arranged along the upstream heat dissipation fin (303) in the air passage and is objectionable to guide and deflect toward the downstream heat release fin (304). Field of view display device according to one of the Claims 1 , 2 and 6th wherein: the heat releasing member (30) comprises: a heat releasing plate (301) having: a surface (301a) coupled to the plurality of light sources (201); and another face (301b) opposite to the one face (301a); and a heat releasing fin (302, 303, 304) protruding from the other surface (301b) of the heat releasing plate (301) and exposed in the air passage (22a); the heat release fin (302, 303, 304) has a base end (302a, 303d, 304d) coupled to the other surface (301b) of the heat release plate (301); and at least one of the plurality of light sources (201) is arranged at a position overlapping the base end (302a, 303d, 304d) of the heat releasing fin (302, 303, 304) in a thickness direction (DRe) of the heat releasing plate (301). Field of view display device according to one of the Claims 1 to 9 wherein: the air conditioning unit (12) comprises a cooling device (123) configured to cool the air flowing in a unit interior passage (122a) in the air conditioning unit (12); the air passage (22a) includes an inlet end (22b) disposed at an upstream end of the air passage (22a) in the flowing direction of the air in the air passage (22a); and the inlet end (22b) communicates with a portion (122e) of the unit inner passage (122a) which is on the downstream side of the cooling device (123) in the flow direction of the air and directs the air cooled by the cooling device (123). Field of view display device according to one of the Claims 1 to 10 , with an air conditioning duct (14) having a duct passage (14a) that guides the air discharged from the air conditioning unit (12) to a predetermined location in the vehicle cabin, wherein: the air passage (22a) has an outlet end (22c ) at a downstream end of the air passage (22a) in the flow direction of the air in the air passage (22a); and the outlet end (22c) communicates with the channel passage (14a). Field of view display device according to one of the Claims 1 to 11 comprising: an upstream duct (24) that guides the air discharged from the air conditioning unit (12) to the air passage (22a); and an output-side pipe (26) into which the air heated by the heat of the plurality of light sources (201) in the air passage (22a) is input from the air passage (22a), wherein: the input-side pipe (24) , the passage forming portion (22) and the discharge side pipe (26) are connected in series to form a pipe member (28). Field of view display device according to Claim 12 wherein at least a portion of the tubular member (28) has flexibility.

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