KR20240041741A - Passive projector assembly - Google Patents

Abstract

The present invention relates to a passive projector assembly, and more specifically, includes an outer case and an inner case mounted inside the outer case, and a beam output means for image transmission is mounted on this inner case so that foreign matter is transmitted to the beam output means. It relates to a passive projector assembly that can output a clear image by preventing the projector from entering the installed space and prevents the device from overheating through a plurality of cooling units located in the outer and inner enclosures.

Description

Passive projector assembly {PASSIVE PROJECTOR ASSEMBLY}

The present invention relates to a passive projector assembly, and more specifically, includes an outer case and an inner case mounted inside the outer case, and a beam output means for image transmission is mounted on this inner case so that foreign matter is transmitted to the beam output means. It relates to a passive projector assembly that can output a clear image by preventing the projector from entering the installed space and prevents the device from overheating through a plurality of cooling units located in the outer and inner enclosures.

A projector is a type of optical device that projects an enlarged image through a lens unit onto an external screen. It is widely used in educational institutions, businesses, and homes due to its advantage of being able to display a large screen both indoors and outdoors wherever a screen can be installed.

These projectors can be divided into DLP (Digital Light Processing) projectors and LCD (Liquid Crystal Display) projectors depending on the driving method. A DLP projector is a projector that uses a digital micromirror display (DMD), which is one of the image display elements. It is a beam projector that passes through the color wheel generated by the projector and reflects and enlarges the image displayed on the DMD chip. An LCD projector is a beam projector that transmits light through a lens and then enlarges and transmits the image transmitted to the LCD panel.

In the case of these projectors, they are always exposed to the external environment, and external foreign substances such as dust or moisture may enter, causing damage to the equipment or preventing a clear screen from being displayed. In addition, the equipment overheats due to the heat generated during operation, causing malfunctions or damage to the equipment due to heat.

Registered Utility Model Bulletin No. 20-0305250 (Public Notice Date: 2003.02.25) Public Patent Publication No. 10-2018-0007924 (Publication date: 2018.01.24)

The problem to be solved by the present invention is a projector assembly for image output, which consists of an outer case and an inner case mounted inside the outer case, and a beam output means including a light emitting unit and a screen panel inside the inner case. It is installed to prevent the inflow of foreign substances.

In other words, since the inner enclosure in which the beam output means is mounted forms a sealed structure, a passive projector assembly is provided that prevents foreign substances from entering the inner enclosure even if foreign substances enter the outer enclosure.

Another object of the present invention is to provide a passive projector assembly that efficiently reduces heat generated inside the inner enclosure through a cooling unit.

The problems to be solved through various embodiments of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

A passive projector assembly according to the present invention includes an outer enclosure having a first output unit for image output, an inner enclosure having a second output unit located inside the enclosure and communicating with the first output unit, and an interior of the inner enclosure. It is located in and includes a screen panel and a light emitting unit that radiates light to the screen panel, and transmits light to the image output from the screen panel to the outside of the enclosure through the second output unit and the first output unit. It may include a cooling unit including a beam output means for outputting a beam output means, an outer case cooling member located inside the outer case, and an inner case cooling member located inside the inner case.

Specific details of other embodiments are included in the detailed description and drawings.

According to embodiments of the present invention, the beam output means for outputting an image is located inside the sealed inner case, so even if foreign substances enter the outer case, they cannot flow into the inner case, and thus the inflow of foreign substances can be completely blocked. there is.

In addition, the first output part of the outer case formed for image output and the second output part of the inner case are communicated by a protector, so that foreign substances can be blocked from entering through the first output part and the second output part.

Furthermore, it is possible to prevent damage to the device due to overheating by constructing a cooling unit in the outer and inner enclosures.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a passive projector assembly according to the present invention.
Figure 2 is an exploded perspective view of a passive projector assembly according to the present invention.
3 is a partially exploded view of a passive projector assembly according to the present invention.
Figure 4 is another exploded view of a passive projector assembly according to the present invention.
Figure 5 is a cross-sectional view of a passive projector assembly according to the present invention.
Figure 6 is an air flow diagram of a passive projector assembly l according to the present invention.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, since various changes can be made to the embodiments, the scope of rights of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes for the embodiments are included in the scope of rights.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the drawing symbols, and overlapping descriptions thereof will be omitted. When describing an embodiment, if it is determined that a detailed description of related known technology may unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

Additionally, when describing components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be connected or connected directly to that other component, but there is no additional component between each component. It should be understood that may be “connected,” “combined,” or “connected.”

Components included in one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description given in one embodiment may be applied to other embodiments, and detailed description will be omitted to the extent of overlap.

As shown in FIGS. 1 to 5, the passive projector assembly (A) according to the present invention includes an outer enclosure 10, an inner enclosure 20 located inside the outer enclosure 10, and the inner enclosure 20. ) It may include a beam output means 40 and a cooling unit 30 located inside.

The drawings in this specification omit the drawing of the cover covering the outer case 10 and the inner case 20 in order to more accurately express the interior of the outer case 10 and the inner case 20, and thus the scope of rights is omitted. It should not be interpreted as limiting. Additionally, in this specification, the direction in which the image is projected is referred to as the front, the opposite direction is referred to as the rear, and the upper and lower directions can be roughly determined based on the drawing. In this specification, electrical and electronic components for controlling the power supply and PCB are omitted as they are similar to the conventional operation method, but it is preferable that the components are mounted inside the inner case 20 rather than the outer case 10. do.

First, the outer case 10 is a case that forms the outer shape of the passive projector assembly (A) according to the present invention, and the first storage portion 11 may be formed. The enclosure 10 is shown in the drawing as having a rectangular shape, but may have various shapes such as circular or polygonal. One or more installation holes 15 may be formed on the other side of the enclosure 10. The installation hole 15 is equipped with a blowing fan 35, which will be described later, and can introduce external air into the enclosure 10.

The first output unit 13 may be in the shape of a ball for irradiating the image emitted from the beam output means 40 to the outside. A protective cap 17 may be further formed on the outside of the first output unit 13. The protective cap 17 may include a truncated cone-shaped or cone-shaped protective wall portion 173 that is open at the front and rear. Therefore, the protective wall portion 173 may have a shape whose inner diameter becomes smaller from the rear to the front. The protective cap 17 may further include a flange portion 171 formed behind the protective wall portion 173. The flange portion 171 may be installed in the front of the enclosure 10. The flange portion 171 may be fixed to the front of the enclosure 10 using bolts, rivets, etc. In another embodiment, the flange portion 171 may be fixed to the front of the enclosure 10 through an adhesive method. In another embodiment, the flange portion 171 may be fixed to the front of the enclosure 10 by being molded using a 3D printer or by injection molding.

A positive pressure maintaining member 18 may be installed around the first output unit 13. The positive pressure holding member 18 may include an opening/closing opening 181 formed in the enclosure 10, and an opening/closing wing 183 capable of opening or covering the door opening. The positive pressure maintaining member 18 can discharge external air introduced into the enclosure 10 when the blowing fan 35 operates.

A wind path can be formed by the blowing fan 35, the protective cap 17, and the positive pressure holding member 18, and the formed wind path acts as an air curtain to prevent foreign substances such as dust from entering the first output unit 13. Inflow can be prevented.

An inner enclosure 20 may be located inside the outer enclosure 10. The inner box 20 may include a second storage portion 21. A first output unit 13 may be formed on the front of the inner enclosure 20. The first output unit 13 may be formed to communicate with the second output unit 23 on the same straight line. An image emitted from a beam output member located inside the inner enclosure 20 may pass through the second output unit 23 . The image passing through the second output unit 23 may pass through the first output unit 13, penetrate the protective cap 17, and be irradiated to the outside.

As shown in the drawing, the inner case 20 may have the same rectangular shape as the outer case 10, but may also have another shape such as a circle or a polygon. The shape of the inner case 20 may be the same as that of the outer case 10, or may be different from the shape of the outer case 10.

The inner case 20 may be configured to a size that can be accommodated inside the outer case 10. Preferably, the wall forming the inner box 20 is spaced apart from the inner wall of the outer box 10 and is of a size capable of forming a space (spacing portion 14).

Although not shown in the drawing, the outer case 10 and the inner case 20 may further include a cover for sealing the first and second storage parts 11 and 21. The cover may have a structure that covers the first accommodating part 11 and the second accommodating part 21 from the upper direction. An operation switch, a display, etc. for device control may be formed on the cover.

The cover may have a structure that covers the outer case 10 and the inner case 20 together with a single cover. At this time, it is advisable to install a separate packing member on the inside of the cover along the outer edge of the inner box 20 to seal the inner box 20. In one embodiment, the cover may be divided into a cover for the outer case 10 and a cover for the inner case 20. The present invention is characterized in that the inner box 20 is configured as a sealed type, and the shape of the cover may be a different shape for sealing the inner box 20, and the scope of rights should not be interpreted as limiting this. In addition, a separate locking means is further formed on the cover so that it can be stably fixed, and this locking means can be replaced with various known technologies.

A beam output member may be located inside the inner enclosure 20, that is, in the second storage unit 21.

The beam output member enlarges and irradiates the transmitted image, and may include a lens panel 41, a screen panel 43, a light emitting unit 45, a heat dissipation unit 47, and a shielding member 49.

The beam output member transmits light to the image transmitted to the screen panel 43 and irradiates it to the outside. More precisely, it can follow the driving method of an LCD projector.

The light emitting unit 45 may include a light emitting member 461 and a holder 453. In one embodiment, the light emitting member 461 may be an LED chip or lighting. The holder 453 may be a member that fixes the light emitting member 461 or may be a PCB. The light emitting member 461 is located on the inner rear wall of the inner box 20 and can emit light toward the front. In one embodiment, the light emitting member 461 may be located on the same line as the second output unit 23.

The light emitting unit 45 is a member that emits light and may generate heat. Additionally, in the present invention, since the inner enclosure 20 has a sealed structure, it is necessary to reduce the heat generated from the light emitting unit 45. Therefore, the present invention may further include a heat dissipation unit 47 to reduce the heat emitted from the light emitting unit 45.

The heat dissipation unit 47 may include a transmission body 471 and a cooling plate 473 connected to the transmission body 471. The transmitter 471 may be composed of one or more than two, and may be connected to the rear end of the light emitting unit 45. That is, the transmitter 471 may be in close contact with the inner wall surface of the rear end of the inner box 20. The light emitting unit 45 may be installed on the front of the transmitter 471. Both ends of the transmission body 471 may be bent through first bent portions 471a and fixed to the inner wall surface of the inner box 20 in correspondence with the shape of the inner wall surface.

In one embodiment, the transmitter 471 contacts both sides of the light emitting unit 45 and may be installed by forming a first bent portion 471a along the inner wall of the inner enclosure 20. In this case, the light emitting unit 45 may be installed directly on the inner wall of the inner enclosure 20.

Furthermore, when the transmitter 471 has a plate-shaped shape, the light emitting unit 45 and the transmitter 471 can be installed together on the inner wall of the inner box 20.

The transmitter 471 is a member that transmits heat coming from the light emitting unit 45, and a cooling plate 473 may be installed on the transmitter 471. The cooling plate 473 may be a single member in which a plurality of heat dissipation fins are arranged in one direction.

The cooling plate 473 may be installed on both sides of the transmission member 471. The cooling plate 473 is in contact with the transmission body 471 formed along the inner wall of the inner box 20, and a second bent portion 473a corresponding to the first bent portion 471a may be formed. .

The shape of the transmission body 471 and the cooling plate 473 may be implemented in other shapes as well as the embodiment described above, and the scope of rights should not be interpreted to limit this.

A screen panel 43 for transmitting images may be located in front of the light emitting unit 45. The screen panel 43 may be one or more LCD panels. Lens panels 41 may be further installed in front and behind the screen panel 43, respectively. The lens panel 41 located behind the screen panel 43 may be a Fresnel lens that collects light emitted from the light emitting unit 45 to the screen panel 43. The panel located in front of the screen panel 43 may be a Fresnel lens that reduces or enlarges the image transmitted to the screen panel 43.

The screen panel 43 and lens panel 41 are components widely used in conventional LCD projectors, and detailed descriptions thereof will be omitted.

Additional shielding members 49 may be positioned behind and in front of the screen panel 43, respectively. Among the blocking members 49, the blocking member 49 located behind the screen panel 43 can prevent light irradiated to the screen panel 43 from leaking to the outside. Therefore, the loss of light emitted from the light emitting unit 45 can be minimized.

The blocking member 49 located in front of the screen panel 43 prevents external light from entering when the image transmitted through the screen panel 43 is irradiated to the second output unit 23. It can be prevented.

As described above, the blocking member 49 can prevent light leakage or prevent light from entering the image. In addition, since the size of the screen panel 43 is larger than the size of the light emitting unit 45 and the size of the second output unit 23 is smaller than the size of the screen panel 43, the shielding member 49 May include a width expansion portion 491 and a width reduction portion 493.

In addition, it may further include a protector 19 connecting the first output unit 13 and the second output unit 23 to each other. The protector 19 may include a tube member 193 and a lens unit 191 installed at one end of the tube member 193.

The protector 19 is for irradiating the image emitted from the beam output member to the outside of the enclosure 10, and can be fitted into the first output unit 13 and the second output unit 23.

The lens part 191 of the protector 19 is located outside the first output part 13 of the outer case 10, and the rear end of the pipe member 193 is the second output part of the inner case 20. (23) It may be located at the rear, that is, inside the inner enclosure (20). The rear end of the pipe member 193 may communicate with the front of the blocking member 49 (the blocking member 49 located in front of the screen panel 43).

Therefore, the protector 19 blocks foreign substances from entering through the second output unit 23 and at the same time protects the image emitted from the beam output member from dust, etc. You can.

The present invention can prevent foreign substances from entering the interior by sealing the inner box 20. However, as the inner box 20 is sealed, a problem may arise in which the generated heat does not escape to the outside. Therefore, in order to solve this problem, the present invention may include a cooling unit 30 located in the outer case 10, the inner case 20, or both.

As shown in FIGS. 1 to 6, the cooling unit 30 includes an enclosure cooling member 31 located in the first storage portion 11 of the enclosure 10 and an inner enclosure 20. It may include an inner cooling member 32 located in the second storage unit 21.

The enclosure cooling member 31 and the inner enclosure cooling member 32, similar to the cooling plate 473, have a shape in which a plurality of heat dissipation fins are arranged in one direction to increase the cooling efficiency by increasing the contact area with air. You can.

First, the inner box cooling member 32 may be located inside the inner box 20. The inner cooling member 32 may be located between the inner wall of the inner box 20 and the shielding member 49. At this time, the blocking member 49 may be a blocking member 49 located in front of the screen panel 43. The inner cooling member 32 may be located on both sides of the shielding member 49, respectively. At this time, as the shielding member 49 includes a width expansion portion 491 and a width reduction portion 493, the inner cooling member 32 also forms a plurality of cut portions adjacent to or on the outer surface of the shielding member 49. It can be positioned in close contact. Furthermore, a second space 321 may be formed between the inner cooling member 32 and the front inner wall surface of the inner box 20. An air layer is formed by the second space 321, and the heat emitted from the inner cooling member 32 can be diffused, so that a further cooling effect can be expected. Figure 6 shows the air circulation structure according to the present invention, with cold air shown in blue and warm air shown in red.

A thermoelectric element 323 may be further installed in the inner cooling member 32. The thermoelectric element 323 may be installed on one or more sides of the inner cooling member 32, and more preferably, as shown in the drawing, the inner cooling member 32 and the inner enclosure 20. It is best to install it in an area where the inner wall is in contact.

The enclosure cooling member 31 may be located inside the enclosure body 10, that is, in the first storage unit 11. The enclosure cooling member 31 may be located in a spaced portion 14 formed between the outer enclosure 10 and the inner enclosure 20. In one embodiment, the enclosure cooling member 31 may be in close contact with the outer wall surface of the inner enclosure 20. In another embodiment, the enclosure cooling member 31 may be in contact with the outer wall of the inner enclosure 20 where the thermoelectric element 323 is located. Therefore, the enclosure cooling member 31 can be expected to have the effect of cooling the heat of the first storage portion 11 of the enclosure body 10 and simultaneously cooling the heat transferred from the thermoelectric element 323.

In addition, the enclosure cooling members 31 can also be arranged in a pair, and a first space 311 is formed in front of each enclosure cooling member 31, so that the discharged heat can be spread and a further cooling effect can be expected. there is.

Within the first storage portion 11 of the outer case 10, a rear cooling member 33 may be located on the rear outer wall of the inner case 20. The rear cooling member 33 is a component of the cooling unit 30 and can cool the heat emitted from the light emitting unit 45 and the transmitter 471. The rear cooling member 33 may include a plate portion 331 installed on the rear outer wall surface of the inner enclosure 20 and a plurality of fin portions 333 arranged to be spaced rearward from the plate portion 331. The blowing fan 35 may be located behind the rear cooling member 33, and the blowing fan 35 may also be a component of the cooling unit 30.

In the present invention with the above configuration, the heat generated in the inner case 20 is reduced through the inner case cooling member 32, and the heat conducted through the inner case 20 is transferred to the outer case cooling member 31 and the rear. It is reduced through the cooling member 33, and the air flows through the blowing fan 35 as shown in FIG. 6, so that the heat inside the enclosure 10 can be discharged forward.

As described above, although the embodiments have been described with reference to limited drawings, those skilled in the art can apply various technical modifications and variations based on the above.

For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

Therefore, other implementations, other embodiments, and things equivalent to the claims should also fall within the scope of the claims described below.

A: Passive projector assembly
10: Enclosure 11: First storage unit
13: first output unit 14: separation unit
15: Installer 17: Protection cap
171: Flange part 173: Protective wall part
18: Positive pressure holding member 181: Opening/closing port
183: Opening and closing wings 19: Protector
191: Lens part 193: Tube member
20: inner box 21: second storage unit
23: second output unit 30: cooling unit
31: Enclosure cooling member 311: First space portion
32: Inner box cooling member 321: Second space part
322: bent portion 323: thermoelectric element
33: rear cooling member 331: plate part
333: Fin portion 35: Blowing fan
40: Beam output means 41: Lens panel
43: screen panel 45: light emitting unit
451: light emitting member 453: holder
47: Heat dissipation unit 471: Transmitter
471a: first bent portion 473: cooling plate
473a: second bent portion 49: shielding member
491: Width expansion part 493: Width reduction part

Claims (8)

An enclosure in which a first output unit for video output is formed;
an inner enclosure located inside the outer enclosure and having a second output unit communicating with the first output unit;
Located inside the inner enclosure, it includes a screen panel and a light emitting unit that irradiates light to the screen panel, transmitting light to the image output from the screen panel to the second output unit and the first output unit. Beam output means outputting to the outside of the enclosure through; and
a cooling unit located inside the inner enclosure and including an inner cooling member that cools the heat inside the inner enclosure;
A passive projector assembly comprising: According to claim 1,
A passive projector assembly further comprising a protector that communicates the first output unit and the second output unit. According to claim 1,
The cooling unit is
A passive projector assembly further comprising a rear cooling member that is in close contact with the outer surface of the inner enclosure and reduces heat generated from the light emitting unit. According to claim 1,
It further includes a heat dissipation unit including a conductor connected to the light emitting unit to transfer heat generated from the light emitting unit, and a cooling plate that contacts the transmitter to dissipate the transferred heat to the outside,
The heat dissipation unit is a passive projector assembly located on the inner wall of the inner enclosure. According to claim 1,
A passive projector assembly in which a thermoelectric element is further installed in the inner cooling member. According to claim 3,
The rear cooling member is a passive projector assembly including a plate portion in contact with a rear outer surface of the inner enclosure, and a plurality of fin portions arranged to be spaced apart from the plate portion. According to claim 5,
The thermoelectric element installed on the enclosure cooling member and the inner enclosure cooling member are in contact with the inside and outside of the inner enclosure, respectively, at positions corresponding to each other, and when the heat emitted from the thermoelectric element is conducted through the inner enclosure to the outside of the inner enclosure, , A passive projector assembly in which the enclosure cooling member dissipates and cools the conducted heat. According to claim 7,
A passive projector assembly wherein the inner enclosure is a sealed inner enclosure in which the exterior and interior of the inner enclosure are not in communication.

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