JP6083204B2 - projector - Google Patents

Description

  The present invention relates to a projector.

  Conventionally, a projector including a cooling unit that cools an internal mechanism is widely known (for example, see Patent Document 1). According to the conventional projector, it is possible to cool the internal mechanism (for example, the power supply unit, the light source unit, and the light modulation unit) of the projector by the cooling unit.

JP 2005-31106 A

  However, a widely known conventional projector is a general type that uses electric power from a battery, an outlet, or the like, and naturally, the configuration and arrangement of the cooling unit are also known in accordance with it. For this reason, a projector that uses power supplied from a light bulb socket, that is, a projector that is connected to a light bulb socket is not provided with a cooling unit, and the configuration and arrangement of the cooling unit are not known. Further, regarding a projector used by being connected to a light bulb socket, downsizing is strongly demanded due to its nature, and thus it is difficult to use a conventionally known configuration and arrangement of a cooling unit as it is.

  Furthermore, when a member corresponding to a shade, such as a lamp cover or a concave depression (hereinafter referred to as a lamp cover or the like) is present around the bulb socket, warm air stays in the lamp cover or the like. Then, if the air that has been warmed by the cooling unit is blown to the object to be cooled, the cooling efficiency of the projector is greatly reduced, which is not preferable (see the comparative example described later). Since it is very customary that a lamp cover or the like is fixed around the bulb socket, a projector that is connected to the bulb socket is required to have a cooling mechanism with good cooling efficiency.

  Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a projector that is used by being connected to a light bulb socket and includes a cooling mechanism that improves the cooling efficiency of the projector. .

  The projector of the present invention includes a connection unit connectable to a light bulb socket, a power supply unit that supplies power from the connection unit, a light source unit that emits light, and modulates light from the light source unit according to image information. An optical engine unit having a light modulation unit and a projection optical system that projects light modulated by the light modulation unit; and the power supply unit and the optical engine unit disposed between the connection unit and the optical engine unit. A cooling unit that cools the air, a communication port through which air circulated by the cooling unit passes, and an opening at an end on a projection direction side where the projection optical system projects light, and the optical engine unit And a cover that covers at least a portion, wherein the cooling unit introduces the air from one of the communication port and the opening and guides the introduced air to the other.

  According to the projector of the present invention, since the cooling mechanism including the cooling unit and the cover is provided, it is possible to improve the cooling efficiency of the projector by separating the air used for cooling from the warm air used for cooling. (Refer to Embodiment 1 described later.)

  In addition, according to the projector of the present invention, since the cover is provided, a cooling flow path is formed between the optical engine unit and the cover, so that the cooling efficiency of the projector can be further improved.

  Further, according to the projector of the present invention, it is arranged between the connection unit and the optical engine unit, and includes a cooling unit that cools the power supply unit and the optical engine unit, so that a compact cooling path can be configured, It becomes possible to contribute to miniaturization of the projector.

  Further, according to the projector of the present invention, since the above-described cooling unit is provided, it is possible to cool main components with one cooling unit, and it is possible to reduce the cost of the projector.

  In addition, according to the projector of the present invention, since the cooling unit is provided as in the conventional projector, the internal mechanism of the projector can be cooled by the cooling unit.

  Further, according to the projector of the present invention, since the connecting portion that can be connected to the light bulb socket is provided, it can be easily attached and used at a place where the light bulb socket is installed.

  In addition, about a power supply part, all the power supply parts may be arrange | positioned in a connection part, and a part of power supply part may be arrange | positioned near an optical engine part.

  In the present specification, the “bulb socket” refers to a general socket for mounting a light bulb. As such a light bulb socket, one having a thread on the inner side surface and having an inner side surface and an inner bottom surface as electrodes (so-called screw-type light bulb socket) is widely used. By using the corresponding connection portion, it is possible to widely apply not only to screw-in type light bulb sockets but also to other types of light bulb sockets (for example, hook-type light bulb sockets).

  In the projector according to the aspect of the invention, it is preferable that the communication port is disposed on a side opposite to the optical engine with respect to the cooling unit.

  By adopting such a configuration, the position of the communication port is at the above position, so that it is possible to more reliably separate the air used for cooling from the warm air used for cooling.

  In the projector according to the aspect of the invention, it is preferable that the cooling unit introduces the air from the opening and discharges the air from the communication port.

  With this configuration, the projector can create an air flow from the image projection side to the light bulb socket side, so that the projection image is prevented from fluctuating due to warm air, which is favorable. It is possible to ensure image quality.

  In addition, since the above configuration creates an air flow from the optical engine unit side to the connection unit side, the light source unit and the light that are highly required to be cooled from the viewpoint of the heat generation amount and the heat-resistant temperature. It becomes possible to cool the modulation unit first to ensure the operational stability of the projector.

  In the projector according to the aspect of the invention, the connection portion and the optical engine portion may be disposed at positions facing each other with the cooling portion interposed therebetween, and the cover may have a cross-sectional area from the opening side toward the cooling portion side. It is preferable to have a smaller shape.

  With such a configuration, it is possible to increase the speed of air flow in the vicinity of the cooling unit, and as a result, it is possible to further improve the cooling efficiency.

  In addition, with the configuration as described above, it can be said that the inside of the cover is widened on the projection direction side, so it is possible to arrange a relatively large dustproof filter at the tip of the cover, and as a result, It is possible to extend the service life of the dust filter.

  In addition, with the above-described configuration, the connecting portion and the optical engine portion are disposed at positions facing each other with the cooling portion interposed therebetween, so that a cooling portion with a simple configuration (for example, an axial flow fan is installed). The main components can be cooled using the

  “The shape in which the cross-sectional area decreases from the opening side toward the cooling part side” means that the cross-sectional area of the internal space decreases as it goes in a certain direction when viewed in a plane perpendicular to a certain axis (for example, If the cross-sectional shape of the internal space is a circle, the diameter of the circle decreases). The certain axis is, for example, the central axis of the connection part or the central axis of the projected image (both central axes may coincide), and the certain direction is, for example, from the optical engine part side to the cooling part side. It is the direction to go. It should be noted that the rate at which the cross-sectional area is reduced may be constant or may not be constant.

  In the projector according to the aspect of the invention, the optical engine unit includes a heat radiating unit that radiates heat from the light source unit on a side other than the side on which the projection optical system projects light, and the cover includes the heat radiating unit. It is preferable to extend in the projection direction.

  By adopting such a configuration, it becomes possible to improve the cooling efficiency of the light source unit.

  Further, with the above-described configuration, it is possible to greatly reduce the heat conducted from the light source unit to other components (for example, the light modulation unit).

  In said structure, it is preferable that an optical engine part has a some light source part and a some heat radiating part corresponding to a some light source part.

  By adopting such a configuration, if different color lights are emitted for each light source unit, a multicolor projection image is projected without separating light from one light source unit emitting white light into a plurality of color lights. It becomes possible to do. In addition, since it is not necessary to separate the light into a plurality of color lights, it is possible to contribute to downsizing of the projector.

  Furthermore, in said structure, it is preferable that a some thermal radiation part is arrange | positioned so that each may not conduct heat with another thermal radiation part. By adopting such a configuration, heat conduction from the heat radiating portion to the heat radiating portion is suppressed, for example, a large heat radiating portion is made to correspond to a light source portion having a large heat generation amount or a low heat-resistant temperature, and a heat generation amount is small or It is possible to perform cooling suitable for each light source unit such that a small heat radiating unit corresponds to a light source unit having a low heat-resistant temperature.

From the viewpoint of separating the air used for cooling and the warm air used for cooling and improving the cooling efficiency, in the projector of the present invention, the cover extends from the cooling unit to the tip of the optical engine unit. It is more preferable to cover.
In addition, since warmed air stays in the lamp cover or the like, in the projector according to the present invention, the "cover has an end on the projection direction side for projecting a projected image from an end on the projection direction side such as a lamp cover". It is even more preferable that it is disposed so as to be positioned on the projection direction side.

  In the projector according to the aspect of the invention, the optical engine unit includes a heat radiating unit that radiates heat from the light source unit on a side other than the side on which the projection optical system projects light, and the cover includes the projection optical unit. It is preferable to cover at least a part of the system and the heat radiating portion and extend in the projection direction.

  With such a configuration, since the cover covers at least a part of the projection optical system and the heat radiating portion and extends in the projection direction, the air used for cooling and the warm air used for cooling Can be more reliably separated.

  In the projector according to the aspect of the invention, it is preferable that the cover has a fixing portion that fixes an expansion member that extends the cover in the projection direction at an end portion on the opening side.

  By adopting such a configuration, the length of the cover is arbitrarily adjusted according to the usage environment and the user's preference such as interior (for example, the lamp cover is large and the length of the projector cover is insufficient) Sometimes it is possible to fix the expansion member and improve the cooling efficiency).

  The expansion member preferably has an opening having a size that does not interfere with projection of the projected image.

  Various methods can be used as a method of the fixing portion for fixing the expansion member to the cover. Examples include a method of fitting using corresponding unevenness and a method of screwing using a screw thread.

  In the projector according to the aspect of the invention, it is preferable that the cover has a dustproof filter in an area of the opening that does not block light from the projection optical system.

  With such a configuration, it is possible to prevent dust and the like from entering the projector and operate the projector for a long time.

  The projector of the present invention includes a connection unit connectable to a light bulb socket, a power supply unit that supplies power from the connection unit, a light source unit that emits light, and modulates light from the light source unit according to image information. An optical engine unit having a light modulation unit and a projection optical system for projecting light modulated by the light modulation unit; and the power supply unit disposed between the connection unit and the optical engine unit and circulating air. And a cooling unit that cools the optical engine unit, a cover that covers at least a part of the optical engine unit, and a projector cover that is arranged to cover at least a part of the cover, The projection direction side end portion is disposed so as to be positioned closer to the projection direction side than the projection direction side end portion of the projector cover.

  According to the projector of the present invention, since the cooling mechanism including the cooling unit and the cover is provided, it is possible to improve the cooling efficiency of the projector by separating the air used for cooling from the warm air used for cooling. (Refer to Embodiment 3 described later.)

  In addition, according to the projector of the present invention, since the cover is provided, a cooling flow path is formed between the optical engine unit and the cover, so that the cooling efficiency of the projector can be further improved.

  Further, according to the projector of the present invention, the cover is arranged so that the end on the projection direction side is located closer to the projection direction than the end on the projection direction side of the projector cover. Therefore, it is possible to prevent the cooling unit from picking up the warmed air, and to further improve the cooling efficiency of the projector.

  Further, according to the projector of the present invention, since the projector cover is provided, even if the lamp cover or the like is fixed around the bulb socket, the influence is reduced, and the projector can be stably cooled. .

  Further, according to the projector of the present invention, it is arranged between the connection unit and the optical engine unit, and includes a cooling unit that cools the power supply unit and the optical engine unit, so that a compact cooling path can be configured, It becomes possible to contribute to miniaturization of the projector.

  Further, according to the projector of the present invention, since the above-described cooling unit is provided, it is possible to cool main components with one cooling unit, and it is possible to reduce the cost of the projector.

  In addition, according to the projector of the present invention, since the cooling unit is provided as in the conventional projector, the internal mechanism of the projector can be cooled by the cooling unit.

  Further, according to the projector of the present invention, since the connecting portion that can be connected to the light bulb socket is provided, it can be easily attached and used at a place where the light bulb socket is installed.

  In addition, about a power supply part, all the power supply parts may be arrange | positioned in a connection part, and a part of power supply part may be arrange | positioned near an optical engine part.

FIG. 3 is a diagram for explaining a projector 1000 according to the first embodiment. FIG. 3 is a diagram for explaining how to use the projector 1000 according to the first embodiment. FIG. 3 is a diagram for explaining the air flow by the cooling unit 30 of the projector 1000 according to the first embodiment. The perspective view of the thermal radiation part 100R, 100G, 100B in Embodiment 1. FIG. The figure shown in order to demonstrate the cover 120 in Embodiment 1. FIG. The figure shown in order to demonstrate the flow of the air by the cooling unit 30 of the projector 1002 which concerns on a comparative example. FIG. 9 is a diagram for explaining a projector 1004 according to a second embodiment. FIG. 10 is a diagram for explaining a projector 1006 according to a third embodiment. FIG. 10 is a diagram for explaining an air flow by a cooling unit 30 of a projector 1006 according to a third embodiment.

  Hereinafter, embodiments of the projector of the present invention will be described.

[Embodiment 1]
FIG. 1 is a diagram for explaining a projector 1000 according to the first embodiment. 1A is a front view of the projector 1000, FIG. 1B is a front view of the projector 1000 with the cover 120 removed, and FIG. 1C is an AA view of FIG. It is sectional drawing. In each of the drawings including FIG. 1, the components that are not related to the present invention among the components of the projector 1000 are omitted.

  FIG. 2 is a diagram for explaining how to use the projector 1000 according to the first embodiment. 2A is a diagram illustrating a state before the projector 1000 is attached to the light bulb socket S, and FIG. 2B is a diagram illustrating a state after the projector 1000 is attached to the light bulb socket S. In FIG. 2, the light bulb socket S and the lamp cover LC are shown in a sectional view.

FIG. 3 is a diagram for explaining the air flow by the cooling unit 30 of the projector 1000 according to the first embodiment. A curved arrow indicated by a symbol F in FIG. 3 represents a schematic air flow. This also applies to FIGS. 6 and 9 described later.
FIG. 4 is a perspective view of the heat dissipation units 100R, 100G, and 100B in the first embodiment. 4A is a perspective view of the heat dissipation part 100G, FIG. 4B is a perspective view of the heat dissipation part 100R, and FIG. 4C is a perspective view of the heat dissipation part 100B.

As shown in FIG. 1, the projector 1000 includes a connection unit 10, a power supply unit 20, a cooling unit 30, an optical engine unit 40, and a cover 120.
As shown in FIG. 2, the projector 1000 is used by connecting to a light bulb socket S having a lamp cover LC fixed around it, for example.

The connection unit 10 is configured to be connectable to a light bulb socket that supplies current from the outside. More specifically, the connecting portion 10 includes a first contact portion 12 located at the tip portion and a second contact portion 14 in which a helical thread (right screw) is formed. , E26 corresponding to the screw-in type light bulb socket S. In addition, the projector 1000 can correspond to various light bulb sockets, for example, a screw-in type light bulb socket and a hook-type light bulb socket other than E26, by including the connection portion 10 that can be connected to the light bulb socket.
Further, the projector 1000 has a slit-like communication port 16 through which air circulated by the cooling unit 30 passes, and the communication port 16 functions as an air inlet and outlet. In the present embodiment, the communication port 16 is disposed on the opposite side of the cooling unit 30 from the optical engine unit 40, but is not limited thereto.
The central axis Ax is an axis that becomes the center of the connecting portion 10. In the case of this embodiment, the center axis Ax coincides with the rotation axis when the connecting portion 10 is rotated and screwed into the light bulb socket. The central axis Ax also coincides with the central axis of the projected image.

  The power supply unit 20 is disposed in the connection unit 10, and the current sent from the light bulb socket via the connection unit 10 is used as another driving element (electric power) for the projector 1000, for example, each light source described later. Supplied to the units 50R, 50G, 50B, the cooling unit 30, and the like. Since the configuration of the power supply unit 20 as a whole is widely known, a detailed description thereof is omitted here. In the projector 1000 according to the first embodiment, as illustrated in FIG. 1C, a part of the power supply unit 20 is disposed in the connection unit 10, and the other part of the power supply unit 20 is a substrate 110 described later. It is arranged in the vicinity (not shown). A part of the power supply unit 20 includes, for example, a primary filter.

The cooling unit 30 is disposed between the connection unit 10 and the optical engine unit 40, and cools the power supply unit 20 and the optical engine unit 40 disposed in the connection unit 10 by circulating air. The connection unit 10 and the optical engine unit 40 are disposed at positions facing the cooling unit 30 with the cooling unit 30 in between. The cooling unit 30 includes, for example, an axial flow type fan.
As shown in FIG. 3, the cooling unit 30 introduces air from an opening 121 to be described later, guides the introduced air to the communication port 16, and discharges the air from the communication port 16. An air flow from the 40 side toward the connection unit 10 side, that is, the power supply unit 20 side is created. For this reason, the air introduced from the side (opening 121) on which the projector 1000 of the cover 120, which will be described later, projects a projected image cools the optical engine unit 40, then passes through the cooling unit 30, and further cools the power source unit 20. Then, it is discharged from the communication port 16 to the outside.

  In the first embodiment, the air flow created by the cooling unit 30 flows through the gap between the optical engine unit 40 and the cover 120 as a flow path. Since the flow path is away from the central axis of the projected image, dust can be prevented from entering the optical path in the optical engine unit 40. Moreover, the air used for cooling and the warm air used for cooling can be separated. Details of the cover 120 will be described later.

  As shown in FIG. 1, the optical engine unit 40 includes light source units 50R, 50G, and 50B, optical collimating optical systems 60R, 60G, and 60B, light modulation units 70R, 70G, and 70B, a cross dichroic prism 80, It has a projection optical system 90, heat radiating parts 100 </ b> R, 100 </ b> G, 100 </ b> B, and a substrate 110.

The optical engine unit 40 includes a plurality of light source units (light source units 50R, 50G, and 50B). The light source units 50R, 50G, and 50B emit light. More specifically, the light source unit 50R emits red light from the light emitting unit 52R (not shown), the light source unit 50G emits green light from the light emitting unit 52G (not shown), and the light source unit Reference numeral 50B emits blue light from the light emitting section 52B (not shown). Of the three light source units 50R, 50G, and 50B, one light source unit 50G is disposed in a direction opposite to the projection direction in which the projection optical system 90 projects light with respect to the cross dichroic prism 80 that is a light combining unit. The remaining two light source units 50R and 50B are arranged in a direction substantially orthogonal to the projection direction with respect to the light combining unit.
Examples of the light emitting units 52R, 52G, and 52B included in the light source units 50R, 50G, and 50B include a light emitting diode (LED), a semiconductor laser (LD), and an organic EL (OLED). If circumstances such as the size of the projector allow, other light sources such as a metal halide lamp, a high-pressure mercury lamp, and an extra-high pressure mercury lamp may be used. Note that the light source unit in the claims is at least one of the light emitting units 52R, 52G, and 52B, or at least one of the light source units 50R, 50G, and 50B including the light emitting units 52R, 52G, and 52B, respectively. It corresponds to.

  The light collimating optical systems 60R, 60G, and 60B make light from the corresponding light source units 50R, 50G, and 50B substantially parallel light. Since such an optical system is widely known, detailed description thereof is omitted here. If necessary, a light homogenizing optical system (integrator optical system) for homogenizing light from the light source units 50R, 50G, and 50B can be further used. Further, when the light emitted from the light source units 50R, 50G, and 50B is parallel light, the light collimating optical system may not be used.

  The light modulation units 70R, 70G, and 70B modulate light from the corresponding light source units 50R, 50G, and 50B according to image information. The light modulation units 70R, 70G, and 70B are liquid crystal type light modulation devices in which a liquid crystal as an electro-optical material is hermetically sealed in a pair of transparent glass substrates, and light from the light source units 50R, 50G, and 50B is used as image information. It is a transmission type light modulation device that modulates accordingly. The light modulators 70R, 70G, and 70B modulate the direction of polarization of light in accordance with given image information using, for example, polysilicon TFTs as switching elements. Although not shown in the figure, an incident-side polarizing plate and an exit-side polarizing plate are respectively disposed before and after the light modulation units 70R, 70G, and 70B with respect to the light traveling direction from the light source units 50R, 50G, and 50B. The The incident-side polarizing plates, the respective light modulators, and the exit-side polarizing plates modulate the incident color light.

  The cross dichroic prism 80 is a light combining unit that combines and emits the light from the three light source units 50R, 50G, and 50B. More specifically, the cross dichroic prism 80 combines the optical image modulated for each color light to form a color image. It is an optical element. The cross dichroic prism 80 has a substantially square shape in plan view in which four right-angle prisms are bonded together, and a dielectric multilayer film is formed on a substantially X-shaped interface in which the right-angle prisms are bonded together. The dielectric multilayer film formed at one of the substantially X-shaped interfaces reflects red light, and the dielectric multilayer film formed at the other interface reflects blue light. By these dielectric multilayer films, the red light and the blue light are bent and aligned with the traveling direction of the green light, so that the three color lights are synthesized.

The projection optical system 90 has a projection lens and a focus adjustment mechanism, and projects it as a projected image. The direction in which the projection optical system 90 projects light is defined as the projection direction.
Since a preferable configuration of the projection optical system 90 is widely known, illustration and detailed description thereof are omitted.

  The optical engine unit 40 includes a plurality of heat radiation units (three heat radiation units 100R, 100G, 100B) corresponding to the plurality of light source units (three light source units 50R, 50G, 50B). The heat radiating units 100R, 100G, and 100B are disposed on the sides other than the light emitting units 50R, 50G, and 50B, and radiate heat from the light emitting units 52R, 52G, and 52B in the light source units 50R, 50G, and 50B. Let The heat radiating portions 100R, 100G, and 100B function as a so-called heat sink, and are made of a material having good thermal conductivity such as aluminum.

  As shown in FIGS. 1B and 4, the heat dissipating parts 100R, 100G, and 100B have different sizes and shapes depending on the thermal characteristics and arrangement positions of the corresponding light source parts 50R, 50G, and 50B. . The heat radiating parts 100R, 100G, and 100B are arranged so as not to conduct heat with other heat radiating parts. As the above arrangement, for example, the heat dissipating parts 100R, 100G, and 100B are various arrangements that are non-thermally conductive, such as an arrangement that does not contact each other and an arrangement that interposes a non-heat transfer member between them. Can be adopted.

The heat dissipating parts 100R, 100G, and 100B have bases 102R, 102G, and 102B and fins 104R, 104G, and 104B that protrude outward in order to increase the area in contact with the air. The fins 104R, 104G, and 104B are disposed so as to face the inner surface of the cover 120. That is, the fins 104 </ b> R, 104 </ b> G, and 104 </ b> B are arranged in the flow path formed by the optical engine unit 40 and the cover 120.
Hereinafter, each heat radiation part 100R, 100G, 100B is demonstrated.

  As shown in FIGS. 1B and 1C, the heat radiating unit 100G corresponding to the light source unit 50G is close to the connection unit 10, more specifically, the projection optical system with respect to the cross dichroic prism 80. The cooling unit 30 is disposed between the light source unit 50 </ b> G disposed on the side opposite to the side on which 90 is disposed and the cooling unit 30. As shown in FIG. 4A, the heat dissipating part 100G has a shape in which the fins 104G extend radially from the base part 102G.

The heat radiating portions 100R and 100B corresponding to the light source portions 50R and 50B are projected onto the position on the side surface, more specifically, to the cross dichroic prism 80, as shown in FIGS. 1B and 1C. The optical system 90 is arranged in a direction (outside) substantially orthogonal to the projection direction with respect to the light source units 50R and 50B, respectively, of the light source units 50R and 50B arranged on the side substantially orthogonal to the light projecting direction. . As shown in FIGS. 4B and 4C, the heat radiation portions 100R and 100B have a shape in which fins 104R and 104B are formed on the outer sides of the base portions 102R and 102B having a conical partial outer surface shape.
The heat radiating part 100R is larger than the heat radiating part 100B. This is because the light characteristics of the light source unit 50R require more cooling than the light source unit 50B. In addition, the magnitude | size and shape of a thermal radiation part can be variously set according to the thermal characteristic and arrangement position of the light source part to be used.

  The substrate 110 mounts electronic components for driving the projector 1000.

  As shown in FIGS. 1 to 3 and 5, the cover 120 is a cover that covers the optical engine unit 40 at least from the end of the cooling unit 30 on the projection direction side. Further, the cover 120 includes at least the cooling unit 30. This is a cover that covers the heat radiating portions 100R, 100G, and 100B from the end portion on the projection direction side and extends toward the projection direction side. In this embodiment, the cover 120 covers the entire optical engine unit 40, but the present invention is not limited to this, and the cover 120 may cover a part of the optical engine unit 40.

  The cover 120 has an opening 121 at the end on the projection direction side where the projection optical system projects light. The cooling unit 30 introduces air from the opening 121, cools the optical engine unit 40 including the light source units 50R, 50G, and 50B and the light modulation units 70R, 70G, and 70B, and further cools the optical engine unit 40. The air thus conducted is guided to the connection portion 10 side to cool the power supply portion 20, and the air is discharged from the communication port 16.

  Although not shown, the cover 120 includes a dustproof filter that prevents foreign matters such as dust from entering the optical engine unit 40 through the opening 121. The dustproof filter is disposed at least in a region that does not block light projected from the projection optical system 90 of the opening 121.

  The cover 120 is arranged such that the end portion on the projection direction side for projecting the projected image is located closer to the projection direction side than the end portion on the projection direction side of the lamp cover LC. That is, as shown in FIG. 2B, the axis that is the center of the connecting portion 10 is the central axis Ax, and the imaginary line that is perpendicular to the central axis Ax and that is in contact with the end of the cover 120 on the projection direction side is the first line. When a virtual line that is perpendicular to the central axis Ax and is in contact with the projection direction side end of the lamp cover LC is a second virtual line L2, the first virtual line L1 and the central axis Ax The contact point is located closer to the projection direction than the contact point between the second virtual line L2 and the central axis Ax.

As shown in FIGS. 1C and 3, the cover 120 has a substantially wedge shape whose cross-sectional area decreases from the opening 121 side (the end side on the projection direction side) toward the cooling unit 30 side.
The cover 120 is made of resin.

  Next, effects of the projector 1000 according to the present embodiment will be described.

  According to the projector 1000 according to the present embodiment, since the cooling mechanism 30 and the cover 120 are provided, the air used for cooling and the warm air used for cooling are separated to improve the cooling efficiency of the projector. It becomes possible to make it.

  Further, according to the projector 1000 according to the present embodiment, since the cover 120 is provided, a cooling flow path is formed between the optical engine unit and the cover, and the cooling efficiency of the projector can be further improved.

  Further, according to the projector 1000 according to the present embodiment, the cooling unit 30 is disposed between the connection unit 10 and the optical engine unit 40 and cools the power supply unit 20 and the optical engine unit 40. The path can be configured, and it is possible to contribute to miniaturization of the projector.

  Further, according to the projector 1000 according to the present embodiment, since the cooling unit 30 is provided, it is possible to cool main components with one cooling unit, and it is possible to reduce the cost of the projector.

  Further, according to the projector 1000 according to the present embodiment, since the cooling unit 30 is provided as in the conventional projector, the internal mechanism of the projector can be cooled by the cooling unit.

  In addition, according to the projector 1000 according to the present embodiment, since the connection portion 10 that can be connected to the light bulb socket S is provided, it can be easily attached and used at a place where the light bulb socket is installed. .

  Further, according to the projector 1000 according to the present embodiment, the communication port 16 is disposed on the side opposite to the optical engine unit 40 with respect to the cooling unit 30, and therefore, the position of the communication port is at the above position. It is possible to more reliably separate the air used for cooling and the air used for cooling.

  Further, according to the projector 1000 according to the present embodiment, the cooling unit 30 introduces air from the opening 121 and discharges air from the communication port 16, so that the projector projects the image from the light bulb socket side. It is possible to create a flow of air that goes in, and to prevent the projected image from fluctuating due to warm air, thereby ensuring good image quality.

  Further, according to the projector 1000 according to the present embodiment, since an air flow from the optical engine unit 40 side toward the connection unit 10 side is created, a light source that is highly required to be cooled from the viewpoint of the amount of heat generation and heat-resistant temperature. It is possible to cool the projector and the light modulator first, and to ensure the operational stability of the projector.

  Further, according to the projector 1000 according to the present embodiment, the cover 120 has a shape in which the cross-sectional area decreases from the opening 121 side toward the cooling unit 30 side, and thus the speed of air flow in the vicinity of the cooling unit is increased. The speed can be increased, and as a result, the cooling efficiency can be further improved.

  Further, according to the projector 1000 according to the present embodiment, it can be said that the inside of the cover 120 is widened on the projection direction side, and thus it is possible to arrange a relatively large dustproof filter at the front end of the cover. As a result, the service life of the dust filter can be extended.

  Further, according to the projector 1000 according to the present embodiment, since the connection unit 10 and the optical engine unit 40 are disposed at positions facing each other with the cooling unit 30 interposed therebetween, a cooling unit having a simple configuration (for example, an axial flow) It is possible to cool the main components with a fan of the formula).

  Further, according to the projector 1000 according to the present embodiment, the optical engine unit 40 includes the heat radiating units 100R, 100G, and 100B, so that the cooling efficiency of the light source unit can be improved.

  Further, according to the projector 1000 according to the present embodiment, since the optical engine unit 40 includes the heat radiating units 100R, 100G, and 100B, the heat conducted from the light source unit to other components (for example, the light modulation unit). It can be greatly reduced.

  Further, according to the projector 1000 according to the present embodiment, since the plurality of heat radiating portions 100R, 100G, and 100B are arranged so as not to conduct heat with other heat radiating portions, heat conduction from the heat radiating portions to the heat radiating portions is performed. For example, a large heat radiating part is associated with a light source part having a large calorific value or a low heat resistant temperature, and a small heat radiating part is associated with a light source part having a small calorific value or a low heat resistant temperature. Cooling suitable for the light source section can be performed.

  Further, according to the projector 1000 according to the present embodiment, the cover 120 has a dustproof filter at least in a region that does not block the light from the projection optical system 90 in the opening 121, so that dust or the like enters the projector. This makes it possible to operate the projector for a long time.

  Here, FIG. 6 is a diagram for explaining the air flow by the cooling unit 30 of the projector 1002 according to the comparative example. FIG. 6 is a cross-sectional view corresponding to FIG. 3 showing the projector 1000 of this embodiment having the cover 120.

  The projector 1002 according to the comparative example basically has the same configuration as that of the projector 1000 according to the present embodiment. However, as illustrated in FIG. 6, the projector 1000 according to the present embodiment is not provided with the cover 120. Is different.

Since the projector 1002 according to the comparative example does not include the cover 120, the cooling unit 30 uses the air once heated for cooling and staying in the lamp cover LC for cooling again, and the cooling efficiency of the projector 1002 is improved. It will decline.
That is, in the projector 1002 according to the comparative example, the cooling unit 30 cannot separate and use the air used for cooling and the warm air used for cooling, and improves the cooling efficiency of the projector 1002. I can't.

[Embodiment 2]
FIG. 7 is a diagram for explaining the projector 1004 according to the present embodiment. 7A is a cross-sectional view of the projector 1004 before connecting the expansion member 124, FIG. 7B is a cross-sectional view of the projector 1004 after connecting the expansion member 124, and FIG. FIG. 7D is a perspective view of the expansion member 124. FIG. 7 (a) and 7 (b) are cross-sectional views corresponding to FIG. 1 (c).

  The projector 1004 according to this embodiment basically has the same configuration as the projector 1000 according to the above embodiment, but the cover 122 is different from the cover 120 of the projector 1000 according to the above embodiment. That is, as shown in FIG. 7, the projector 1004 fixes an expansion member 124 that extends the cover 122 in the projection direction at the end on the opening 121 side in the direction in which the projector 1004 projects a projected image. A cover 122 having a fixing portion 123 is provided.

  The cover 122 basically has the same configuration as the cover 120 in the above-described embodiment, except that a fixing portion 123 that engages and fixes the expansion member 124 is provided at an end portion. The fixing part 123 has a protruding convex part on the inner peripheral part. The convex portion of the fixing portion 123 can be fixed by engaging the expansion member 124 with the fixing portion 123. Moreover, the fixing | fixed part 123 consists of resin, for example.

  As shown in FIGS. 7C and 7D, the expansion member 124 has a shape like an outer surface of a cone with a pointed portion cut off. The expansion member 124 has an opening 126 and an opening 127 having a size that does not interfere with projection of a projected image.

  The expansion member 124 has an engaging portion 125 that engages with the fixing portion 123 of the cover 122 on the side of the opening portion 126 that has a smaller opening area. The engaging part 125 has a concave shape corresponding to the convex part of the fixing part 123 of the cover 122. The extension member 124 can be attached to the cover 122 by engaging and fixing the convex portion of the fixing portion 123 and the concave engagement portion 125, and the projector 1004 can extend the length of the cover 122. It has a configuration. In the present embodiment, the configuration in which the expansion member 124 is fixed to the cover 122 is not limited to this, and various methods can be used. For example, the cover 122 and the expansion member 124 are provided with a thread, A method of screwing and fixing to the other can be used.

  As described above, the projector 1004 according to the present embodiment is different in the configuration of the cover 122 from the projector 1000 according to the above embodiment, but includes the cooling mechanism of the cooling unit 30 and the cover 122, and thus the projector 1000 according to the above embodiment. Similarly to the above, it is possible to separate the air used for cooling and the warm air used for cooling to improve the cooling efficiency of the projector.

  Further, according to the projector 1004 according to this embodiment, the cover 122 has the fixing portion 123 that fixes the expansion member 124 that extends the cover 122 in the projection direction at the end on the opening 121 side. Or, for example, as an interior, the length of the cover can be arbitrarily adjusted according to the user's preference.

  The projector 1004 according to the present embodiment has the same configuration as the projector 1000 according to the above-described embodiment except for the configuration of the cover 122, and thus has the same effects as the projector 1000 according to the present embodiment.

[Embodiment 3]
FIG. 8 is a diagram for explaining the projector 1006 according to this embodiment. 8A is a front view of the projector 1006, FIG. 8B is a front view of the projector 1006 with the projector cover 130 removed, and FIG. 8C is a cross-sectional view of the projector 1006. FIG. 8C is a cross-sectional view corresponding to FIG.
FIG. 9 is a diagram for explaining the flow of air by the cooling unit 30 of the projector 1006 according to the present embodiment. FIG. 9 is a cross-sectional view of the projector 1000 corresponding to FIG. 3, and illustration of the light bulb socket S and the lamp cover LC is omitted.

  The projector 1006 according to this embodiment basically has the same configuration as the projector 1000 according to the above-described embodiment, but differs in that a projector cover 130 is provided. That is, the projector 1006 according to this embodiment includes a projector cover 130 that is disposed so as to cover the cover 120 as shown in FIGS. 8 and 9.

  The projector cover 130 is a member that functions like a lamp cover or the like. From the relationship between the cover 120 and the projector cover 130, the cover 120 is arranged such that the end portion on the projection direction side is located closer to the projection direction side than the end portion on the projection direction side of the projector cover 130. That is, as shown in FIG. 8A, a virtual line that is perpendicular to the central axis Ax and is in contact with the end of the cover 120 on the projection direction side is the third virtual line L3, and is perpendicular to the central axis Ax. In addition, when the virtual line in contact with the projection direction end of the projector cover 130 is the fourth virtual line L4, the contact point between the third virtual line L3 and the central axis Ax is the fourth virtual line L4 and the central axis Ax. Located closer to projecting the projected image than the contact.

  According to the projector 1006 according to the present embodiment, since the cooling mechanism 30 and the cover 120 are provided, the air used for cooling is separated from the warm air used for cooling, thereby improving the cooling efficiency of the projector. It becomes possible to make it.

  Further, according to the projector 1006 according to the present embodiment, since the cover 120 is provided, a cooling flow path is formed between the optical engine unit and the cover, and the cooling efficiency of the projector can be further improved.

  Further, according to the projector 1006 according to the present embodiment, the cover 120 is disposed such that the end portion on the projection direction side is positioned closer to the projection direction side than the end portion on the projection direction side of the projector cover 130. It is possible to prevent the cooling unit from picking up warm air staying in the cover, and to further improve the cooling efficiency of the projector.

  Further, according to the projector 1006 according to the present embodiment, since the projector cover 130 is provided, even if the lamp cover or the like is fixed around the light bulb socket, the influence is reduced, and the projector is stably cooled. Is possible.

  Further, according to the projector 1006 according to the present embodiment, since the cooling unit 30 is disposed between the connection unit 10 and the optical engine unit 40 and cools the power supply unit 20 and the optical engine unit 40, the projector 1006 is compactly cooled. The path can be configured, and it is possible to contribute to miniaturization of the projector.

  Further, according to the projector 1006 according to the present embodiment, since the cooling unit 30 is provided, it is possible to cool main components with one cooling unit, and it is possible to reduce the cost of the projector.

  Further, since the projector 1006 according to the present embodiment includes the cooling unit 30 as in the case of the conventional projector, the internal mechanism of the projector can be cooled by the cooling unit.

  Further, according to the projector 1006 according to the present embodiment, since the connection portion 10 that can be connected to the light bulb socket S is provided, it can be easily attached and used at a place where the light bulb socket is installed. .

  Since the projector 1006 according to the present embodiment has the same configuration as the projector 1000 according to the first embodiment except that the projector cover 130 is provided, the projector 1006 according to the first embodiment has the same effects.

[Modification]
As mentioned above, although this invention was demonstrated based on said embodiment, this invention is not limited to said embodiment. The present invention can be carried out in various modes without departing from the spirit thereof, and for example, the following modifications are possible.

  The dimensions, the number, the material, and the shape of each component described in the above embodiments are exemplifications, and can be changed within a range that does not impair the effects of the present invention.

  In each said embodiment, although the power supply part 20 was arrange | positioned inside the connection part 10, this invention is not limited to this. If the power supply unit 20 is configured to be able to supply the current (electric power) from the light bulb socket to each component such as the light source unit (light emitting unit) and the cooling unit via the connection unit 10, a part of the power source unit 20 is inside the connection unit 10. The structure arrange | positioned may be sufficient, and the structure arrange | positioned outside the connection part 10 may be sufficient.

  In each of the above embodiments, a liquid crystal type light modulation device is used as the light modulation unit, but the present invention is not limited to this. As the light modulation section, generally, any light modulation section may be used as long as it modulates light from the light source section according to image information. For example, a micromirror type light modulation device or the like may be used. For example, a DMD (digital micromirror device) can be used as the micromirror light modulator.

  In each of the above embodiments, a projector including three light modulation units has been described as an example, but the present invention is not limited to this. The present invention can also be applied to a projector using one, two, or four or more light modulation units. For example, in the case of a projector having one liquid crystal type light modulation unit, a configuration in which one light modulation unit is arranged at the subsequent stage of the light combining unit can be given. Further, in the case where the projector includes a light homogenizing optical system after the light synthesizing unit, a configuration in which one light modulating unit is disposed between the light homogenizing optical system and the projection optical system can be given. Further, one light modulation unit may be arranged in the light uniformizing optical system.

  In the above-described embodiment, one expansion member 124 is connected to the projector, but the present invention is not limited to this. Two or more expansion members may be connected. This can be realized, for example, by providing a portion corresponding to the fixing portion 123 also on the expansion member 124 side.

  In the third embodiment, the projector cover 130 is added to the projector 1000 described in the first embodiment, but the present invention is not limited to this. The projector of the present invention may have a configuration in which a projector cover 130 is added to the projector 1004 described in the second embodiment.

  In each of the above embodiments, the cover 120 is configured to extend in the projection direction from the end of the cooling unit 30 on the projection direction side, but the present invention is not limited to this. The cover 120 extends in the projection direction from the end of the cooling unit 30 on the opposite side to the projection direction, that is, the cover 120 may cover the cooling unit 30. In addition, the cover 120 may cover the cooling unit 30 and part of the connection unit 10 and extend in the projection direction as long as the connection unit 10 can be connected to the light bulb socket S.

  In the third embodiment, as shown in FIG. 9, the projector cover 130 covers the communication port 16 from the side of the connection portion 10 and is arranged so as to extend in a cross-sectional area in the projection direction. The cooling unit 30 is configured to introduce air from the opening 121, cool the optical engine unit 40, the power supply unit 20, and the like, and discharge the cooled and warm air from the communication port 16. Although the air from 16 distribute | circulates the space provided between the projector cover 130 and the cover 120, and was discharged | emitted outside the projector, this invention is not limited to this. The projector cover 130 extends from the end of the communication port 16 on the projection direction side so as to extend in the projection direction without covering the communication port 16, and the warm air from the communication port 16 covers the projector cover 130 and the cover. The configuration may be such that the space provided between the projector 120 and the projector 120 is not circulated and is directly discharged to the outside of the projector.

DESCRIPTION OF SYMBOLS 10 ... Connection part, 12 ... 1st contact part, 14 ... 2nd contact part, 16 ... Communication port, 20 ... Power supply part, 30, 32 ... Cooling part, 40 ... Optical engine part, 50R, 50G, 50B ... Light source part , 60R, 60G, 60B ... optical collimating optical system, 70R, 70G, 70B ... optical modulation unit, 80 ... cross dichroic prism, 90 ... projection optical system, 100R, 100G, 100B ... heat dissipation unit, 102R, 102G, 102B ... Base, 104R, 104G, 104B ... fins, 110 ... substrate, 120, 122 ... cover, 123 ... fixing part, 124 ... expansion member, 125 ... engagement part, 130 ... projector cover, 1000, 1002, 1004, 1006 ... projector , LC ... Lamp cover, S ... Socket

Claims (7)

A connection that can be connected to a light bulb socket;
A power supply for supplying power from the connection;
A light source unit for emitting light, a light modulator for modulating the light on the image information from the light source unit, a projection optical system for projecting the light modulated by the pre-Symbol light modulator, the projection optical system An optical engine part having a heat radiating part for radiating heat from the light source part provided on a side other than the side projecting light ;
A cooling unit that is disposed between the connection unit and the optical engine unit and cools the power supply unit and the optical engine unit;
A communication port through which air circulated by the cooling section passes;
The projection optical system has an opening at an end portion on a projection direction side for projecting light, covers the heat radiation unit, the cooling unit, and the optical engine unit, and a cover that extends in the projection direction, Prepared,
In the cover, an end on the opening side covers a tip on the projection direction side of the optical engine unit, and
The cooling unit introduces the air from one of the communication port and the opening and guides the introduced air to the other. The projector according to claim 1.
The communication port is disposed on a side opposite to the optical engine unit with respect to the cooling unit. The projector according to claim 2,
The projector, wherein the cooling unit introduces the air from the opening, and discharges the air from the communication port. The projector according to claim 3.
The connection part and the optical engine part are respectively arranged at positions facing each other across the cooling part,
The projector has a shape in which a cross-sectional area decreases from the opening side toward the cooling part side. The projector according to any one of claims 1 to 4 ,
The projector includes a fixing portion that fixes an extension member that extends the cover in the projection direction at an end on the opening side. In the projector in any one of Claims 1-5 ,
The projector has a dustproof filter at least in a region of the opening that does not block light from the projection optical system. The projector according to any one of claims 1 to 6,
Further comprising a projector cover disposed to cover at least a part of the cover,
Projector said cover, an end portion of the opening portion side, from an end portion of the projection direction of the projector cover, characterized in that it is arranged to be positioned in the projection direction.

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