CN101271262A - Projector - Google Patents

Abstract

The present invention provides a projector capable of reducing the increase in volume of the projector as a whole and at the same time allowing a fan unit to be installed smoothly without tilting it. The shielding plate (38) has a cutout portion (38B) extending an appropriate length from the end portion (38A) on the side of the opening (34A) in such a manner that its height is cut in half; The insulating plate (36), which is substantially the same as the shielding plate (38), has a cutout portion (36B) extended by an appropriate length from the end portion (36A) on the side of the opening portion (34A) by cutting its height in half. . The exposed amount of the insulating plate (36) from the height region of the shielding plate (38) is reduced, and the exhaust unit (70) can be installed smoothly without touching the insulating plate (36).

Description

Projector

technical field

The present invention relates to projectors.

Background technique

Conventionally, there is known a so-called three-panel projector in which a light beam emitted from a light source is separated into three primary colors of red, green, and blue by a color separation optical system using a dichroic mirror, etc. A light modulation device modulates each color light according to the image information, synthesizes the image-modulated color lights with a cross dichroic prism, and enlarges and projects a color image through a projection lens.

Such a projector is configured to include a power supply unit that supplies power to various built-in devices, and a fan unit that exhausts air inside the devices to the outside. In addition, the power supply unit and the fan unit are disposed adjacent to each other for the purpose of reducing overall volume increase (see Patent Document 1).

On the other hand, for the purpose of removing electromagnetic wave noise generated from the power supply unit, the power supply unit is provided with a shield plate to surround the power supply unit itself. In addition, in order to electrically insulate the power supply unit from the shield plate, the insulating plate is arranged to be sandwiched between the power supply unit and the shield plate.

Patent Document 1: JP-A-2006-243361

However, in the above-mentioned projector, first, the power supply unit is provided on the exterior casing, and then the fan unit is provided at a position adjacent to the power supply unit. Here, if the insulating plate extends so as to protrude from the end edge of the shield plate, the fan unit to be installed hits the insulating plate, making it difficult to install the fan unit. In addition, in such a case, if the fan unit is forcibly installed, the insulating plate is interposed, and the interposed insulating plate pushes the fan unit to one side, thereby causing the fan unit to incline. If the fan unit is tilted, it may not work properly.

Contents of the invention

The present invention has been made in view of such problems, and an object of the present invention is to provide a projector capable of reducing the increase in overall size of the projector and eliminating the problem that the fan unit does not work properly due to inclination.

In order to solve the above-mentioned problems, the present invention provides a projector having the following features.

That is, the projector of the present invention includes a power supply unit and a fan unit disposed adjacent to the power supply unit, and is characterized in that it includes a shielding plate disposed so as to surround the power supply unit, and is sandwiched by the power supply unit. An insulating plate provided between the power supply unit and the shielding plate; an edge of the insulating plate disposed on the side of the fan unit is formed to have a shape along an edge of an adjacent shielding plate.

According to this projector, since the end edge of the insulating plate arranged on the fan unit side is formed to have a shape along the end edge of the adjacent shield plate, the insulating plate on the fan unit side is formed to have substantially the same thickness as that of the shield plate. shape. Thereby, the insulating plate is formed to have a shape in which the amount of exposure from the shape region of the shield plate is reduced. In addition, the shape along the edge of the shielding plate means a shape formed so as not to deviate greatly from the edge of the adjacent shielding plate.

Accordingly, when the fan unit is disposed adjacent to the power supply unit, it is difficult for the fan unit to touch the insulating plate, and the fan unit does not pinch the insulating plate. Therefore, it is possible to install the fan unit smoothly without pinching the insulating plate and without causing a problem of inclination.

In the projector of the present invention, preferably, in the above-mentioned projector, a part of the shield plate arranged on the side of the fan unit is provided with a cutout; Edges of the insulating plates are formed to have shapes along edges of the notches of adjacent shielding plates.

According to the projector of the present invention, even if the shielding plate is formed to have a notch shape preferable in design, the end edge of the insulation plate adjacent to the shielding plate is formed to have an end edge along the cutout portion of the adjacent shielding plate. The shape of the insulating plate becomes such that the amount exposed from the shape area of the shielding plate becomes smaller.

Accordingly, when the fan unit is installed adjacent to the power supply unit, the fan unit is less likely to touch the insulating plate, and the fan unit does not pinch the insulating plate.

Description of drawings

Figure 1 is a perspective view of the interior of the projector;

2 is a schematic diagram of an optical system built into a projector;

Fig. 3 is a perspective view showing the arrangement of an exhaust unit;

Fig. 4 is an enlarged perspective view of a power supply unit on the exhaust unit side.

Label description

1...Projector; 10...Lower casing; 20...Cooling device; 21A, 21B...Sirocco fan; 22...Sucking side pipe; 23...Exhaust side pipe; 30. ..power supply unit; 31...power supply block; 32...lamp drive block; 33A, 34A...opening; 33, 34...box-shaped member; 35, 36...insulating plate; 36B...notch portion; 36C...end edge of insulating plate; 37, 38...shielding plate; 38B...notch portion; 38C...end edge of shielding plate; 40...light source device; 50...optical unit; 52...uniform illumination optical device; 53...color separation optical device; 54...relay optical device; 55...optical device; 60...projection lens; 70. ..exhaust unit; 551...LCD panel; 552...incident side polarizer; 553...exit side polarizer; 554...cross dichroic prism; C...installation space

Detailed ways

Next, an embodiment of the projector 1 of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the inside of a projector 1 of the present invention. In addition, in this perspective view, the inside of the projector 1 is shown in a state where the control device and the upper casing are removed so that the assembled units and members can be easily seen.

That is, the projector 1 is roughly configured to include: a lower casing 10 serving as an exterior casing; a cooling device 20 mounted on the lower casing 10; a power supply unit 30 for supplying electric power to various built-in devices; and a light source device. 40, which emits light; an optical unit 50, which optically processes the light beam emitted from the light source device 40 to form a color image corresponding to image information; a projection lens 60, which projects the image light from the optical unit 50; The air unit 70 serves as a fan unit that discharges the air inside the housing composed of the lower housing 10 and the upper housing (not shown) to the outside. In addition, although not shown, this projector 1 further includes a control device and an upper casing provided so as to be placed on each of these devices.

The cooling device 20 is a device for cooling the inside of the projector 1 . That is, the cooling device 20, as shown in FIG. The heat-generating components inside the projector 1 (for example, a liquid crystal panel 551 , which will be described later, etc.) are cooled. Specifically, the cooling device 20 is configured to include: a pair of Sirocco fans 21A, 21B, a suction-side duct 22 connected to the suction side of the pair of Sirocco fans 21A, 21B, and a pair of Sirocco fans 21A, 21B connected to The discharge side pipe 23 on the discharge side.

The cooling device 20, driven by sirocco fans 21A, 21B, introduces external cooling air into the projector 1 through the suction side duct 22 from the suction port (not shown) of the lower casing 10, and then passes the cooling air connected to each The discharge-side duct 23 on the discharge side of the sirocco fans 21A, 21B sends cooling air to a heat-generating component (for example, a liquid crystal panel 551 described later), thereby cooling the heat-generating component.

The power supply unit 30 is a device for supplying electric power to each component (a light source lamp, a control board, etc.) constituting the projector 1 . The power supply unit 30, as shown in the perspective view of FIG. The power of the light source lamp 42 is lit.

The power supply block 31 and the lamp driving block 32 are unitized so that cuboid box-shaped members 33 and 34 extending in a direction perpendicular to the axial direction of the projection lens 60 can be inserted into a unit.

The box-shaped members 33, 34 are provided to cope with EMI (Electro Magnetic Interference: Electromagnetic Interference), and include: insulating plates 35, 36 arranged to surround the power supply block 31 and the lamp driving block 32, and to surround Metal shielding plates 37 , 38 are provided in the form of the insulating plates 35 , 36 . That is, the insulating plates 35, 36 are provided to be sandwiched between the power supply block 31 and the lamp driving block 32 as the power supply unit, and the shielding plates 37, 38 corresponding thereto, respectively.

In addition, by configuring the box-shaped members 33 and 34 in this way, the insulating plates 35 and 36 and the shielding plates 37 and 38 have an arrangement relationship adjacent to each other.

As shown in FIG. 1 , the box-shaped members 33 and 34 are provided with openings 33A and 34A on the side opposite to the side adjacent to the cooling device 20 (the −X-axis direction side). The openings 33A and 34A function as exhaust ports for exhausting the air heated by the power supply block 31 and the lamp driving block 32 .

FIG. 2 schematically shows the configuration of a light source device 40 , an optical unit 50 , and a projection lens 60 as main parts when projecting an image. The light source device 40 is a device that emits light beams, and is configured to include a light source device main body 41 and a parallelizing lens 44 . In addition, the light source device main body 41 includes a light source lamp 42 (see FIG. 2 ) and a reflector 43 . In addition, this light source device 40 is unitized by being attached to a globe 45 .

The optical unit 50 is a unit for optically processing the light beam emitted from the light source device 40 under the control of the control device to form a color image corresponding to image information. The optical unit 50 is configured to include: a uniform illumination optical device 52, which is used to uniformly irradiate the light beam on the image forming area of the liquid crystal panel 551; Part of the light beam is separated into red, green and blue three-color light; relay optical device 54, which guides the color light separated by color separation optical device 53 into optical device 55; optical device 55, which separates and incident light beam according to image information modulated to form image light (color image); and the housing 51 for optical components that accommodates these various devices.

Briefly describing each optical device, the uniform illumination optical device 52 is configured to include an appropriate lens array 521 , a polarization conversion element 522 and an overlapping lens 523 . The color separation optical device 53 is configured to include dichroic mirrors 531 and 532 and a reflection mirror 533 . The relay optical device 54 is configured to include an incident-side lens 541 , a relay lens 542 , and reflection mirrors 543 and 544 . The optical device 55 is configured to include three liquid crystal panels 551 (551R, 551G, and 551B) as light modulation devices, and an incident-side polarizing plate 552 and an output-side polarizing plate disposed on the light beam incident side and the light beam exiting side of each liquid crystal panel, respectively. 553, and a cross dichroic prism 554 as a color synthesis optical device. In addition, reference numeral 525 is a field lens.

Although not shown in detail, the projection lens 60 includes a plurality of lenses and a cylindrical lens barrel housing the plurality of lenses therein, and magnifies and projects a color image formed by the optical unit 50 .

The exhaust unit 70 sucks the heated air stagnated inside the projector 1 and discharges it to the outside of the projector 1 through exhaust ports formed on the lower case and the upper case (not shown) as the exterior case. . The exhaust unit 70 is a unit provided adjacent to the power supply unit 30 as shown in FIG. 1 , and is configured to include an axial fan 71 and an exhaust duct 72 .

The axial flow fan 71 is, as shown in FIG. 1 , arranged opposite to the light source device 40 and arranged obliquely so that the discharge direction of air faces the −X-axis direction with respect to the +Z-axis direction. The axial flow fan 71 is driven and controlled by the control board, and is driven to suck in the air sent by the cooling device 20 to the liquid crystal panel 551 and the air near the light source device 40 and then discharge it to the exhaust duct 72 .

The exhaust duct 72 is connected with the discharge port of the axial fan 71, and discharges the air discharged from the axial fan 71 to the exhaust port (not shown) formed on the lower casing 10 and the upper casing. Projector 1 external.

The axial flow fan 71 and the exhaust duct 72 constituted as described above are assembled to form an exhaust unit 70 , and the exhaust unit 70 is provided adjacent to the power supply unit 30 as shown in FIG. 3 . FIG. 3 is a perspective view showing the installation of the exhaust unit 70 .

The exhaust unit 70 is provided in an installation space C provided between the power supply unit 30 and the light source device 40 as shown in FIG. 3 . That is, the exhaust unit 70 is installed in the installation space C such that the axial fan 71 is arranged to face the light source device 40 , and furthermore, the exhaust duct 72 is adjacent to the power supply unit 30 .

The shielding plate 38 and insulating plate 36 arranged on the side of the exhaust unit 70 (side of the installation space C) are configured as follows. FIG. 4 is an enlarged perspective view of the power supply unit 30 on the installation space C side, showing the opening 34A side of the box-shaped member 34 .

As shown in FIG. 4 , the shield plate 38 has a cutout portion 38B extended by an appropriate length from an end portion 38A on the side of the opening portion 34A by cutting a part in the height direction in half. The height of the notch portion 38B is inclined so as to gradually decrease toward the end portion 38A. Reference numeral 38C denotes an end edge along the notch portion 38B of the shield plate 38 .

The insulating plate 36 adjacent to the shield plate 38 is formed in a shape corresponding to the shape of the shield plate 38 . As shown in FIG. 4 , in the insulating plate 36 arranged on the side of the exhaust unit 70 , the edge 36C of the insulating plate 36 is along the end edge 38C of the cutout portion 38B of the adjacent shielding plate 38 at the portion on the side of the opening 34A. shape. That is, the insulating plate 36 is formed to have substantially the same shape as that of the adjacent shielding plate 38 . Specifically, as shown in FIG. 4 , insulating plate 36 has a cutout portion 36B extending by an appropriate length from end portion 36A on the opening 34A side, substantially the same as shielding plate 38 , with its height cut in half. In addition, the insulating plate 36 in the illustrated example is formed such that its end edge 36C slightly extends from the end edge 38C of the shield plate 38 .

The projector configured as described above exhibits the following effects.

That is, according to the projector 1, the insulating plate 36 is formed with a notch 36B having substantially the same shape as the notch 38B provided on the shield plate 38, and is arranged at the end of the insulating plate 36 on the exhaust unit 70 side. The edge 36C has a shape along the edge 38C of the adjacent shield plate 38 . Accordingly, the exposed amount of the insulating plate 36 on the side of the exhaust unit 70 from the shielding plate 38 is reduced. Therefore, even when the exhaust unit 70 is installed adjacent to the power supply unit 30 , the installed exhaust unit 70 hardly hits the insulating plate 36 and the insulating plate 36 is not sandwiched by the exhaust unit 70 . Through the above, the exhaust unit 70 provided does not pinch the insulating plate 36 and the problem of inclination of the exhaust unit 70 does not arise.

In addition, the projector of the present invention is not limited to the above-described embodiments, and can be appropriately and selectively changed within a range not departing from the gist of the present invention.

The shielding plate and insulating plate of the projector of the present invention are not limited to the illustrated example, and may be formed by selecting appropriate shapes.

In addition, in the above-described embodiment, a so-called three-panel projector including three liquid crystal panels 551 has been described as an example. However, the projector of the present invention is not limited thereto, and may be a single-panel projector including one liquid crystal panel. In addition, it may be configured as a projector including two liquid crystal panels, or a projector including four or more liquid crystal panels.

In addition, in the above-mentioned embodiment, a transmissive liquid crystal panel having a different light entrance surface and a light exit surface is used, but a reflective liquid crystal panel having the same light entrance surface and light exit surface may also be used. In addition, in the above-mentioned embodiments, a liquid crystal panel was used as the light modulator, but a light modulator other than liquid crystal, such as a device using a micromirror, may be used. In this case, the polarizing plates 552 and 553 on the beam incident side and the beam emitting side can be omitted.

The projector of the present invention arranges the fan unit and the power supply unit adjacent to each other without inappropriateness, thereby reducing the increase in the overall size, and can be used as a projector for presentations or home theaters.

Claims (2)

1. projector, this projector comprise power supply unit and with the fan unit of the adjacent setting of described power supply unit, it is characterized in that, comprising:

The barricade that is provided with in the mode of surrounding described power supply unit, and the insulcrete that is provided with in the mode that is clipped between described power supply unit and the described barricade;

Wherein, the ora terminalis that is configured in the described insulcrete of described fan unit side forms the shape that has along the ora terminalis of adjacent described barricade.

2. projector as claimed in claim 1 is characterized in that:

Be configured on the described barricade of described fan unit side, be provided with the cut notch of a part;

The ora terminalis that is configured in the described insulcrete of described fan unit side forms the shape that has along the ora terminalis of the described notch of adjacent described barricade.

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