KR20170001433A - Screen for Projector - Google Patents

Screen for Projector Download PDF

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Publication number
KR20170001433A
KR20170001433A KR1020150091417A KR20150091417A KR20170001433A KR 20170001433 A KR20170001433 A KR 20170001433A KR 1020150091417 A KR1020150091417 A KR 1020150091417A KR 20150091417 A KR20150091417 A KR 20150091417A KR 20170001433 A KR20170001433 A KR 20170001433A
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KR
South Korea
Prior art keywords
screen film
screen
frame
bezel
layer
Prior art date
Application number
KR1020150091417A
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Korean (ko)
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KR101777856B1 (en
Inventor
조훈
김영성
김성태
김진범
Original Assignee
엘지전자 주식회사
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Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020150091417A priority Critical patent/KR101777856B1/en
Publication of KR20170001433A publication Critical patent/KR20170001433A/en
Application granted granted Critical
Publication of KR101777856B1 publication Critical patent/KR101777856B1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens

Abstract

A screen for a projector according to an embodiment of the present invention includes a screen film part including a diffusion layer for diffusing light and a reflection layer and including a plurality of holes formed at upper, A bezel portion that covers the screen film portion, a frame portion that is disposed on the back surface of the screen film portion and that is coupled to the bezel portion, and one end that passes through a hole and the other end that is fixed to the frame portion, And an end portion of the screen film portion is fixed to the side surface of the frame portion by bending at each end portion of the frame portion so as to satisfy the design and the price, The film can be perfectly flat.

Description

Screen for Projector {Screen for Projector}

The present invention relates to a screen, and more particularly to a projector and a screen for a projector.

In recent years, with the increase in the consumption of high-quality, large-capacity multimedia contents, it is required to increase the size and quality of the display screen.

Among the display devices, a projector is a device for projecting an image, and can be used for presentation of a conference room, a projector of a theater, a home theater of a home, and the like.

On the other hand, in such a projector, a projector screen is used for viewing an image, and an optical screen for maximizing the performance of the projector is also being developed.

 Recently, a beam projector using a laser light source capable of realizing a large screen of 80 inches and 100 inches or more is a display device capable of reproducing moving pictures through receiving data as well as receiving a TV, and a product having a distance of about 50 cm between a light source and a display panel is developed .

In the case of such a display device, the distance between the screen unit fixed to the wall and the light source module including the light source device can be set to be close to each other, thereby limiting the installation space and realizing a large screen This is advantageous.

Until now, the bezel has a structure that applies tensile force to the film by a spring on a wide frame and lamination of honeycomb with a film and rigid structure, but it causes a rise in the price of the product.

Up to now, the typical screen is a structure that makes the film flat by using the tensile force of the spring, though the price is low. This is cheaper because of the lower cost of configuration, but it is vulnerable because of its wide bezel in terms of design.

Another typical structure is a structure in which a film is laminated on a honeycomb having a flat rigid structure. This can reduce the thickness of the bezel, but it adds to the cost of the process and the additional cost of the honeycomb.

SUMMARY OF THE INVENTION An object of the present invention is to provide a screen structure in which a film is perfectly flat for a projection image without distortion while satisfying design and price.

According to one aspect of the present invention, there is provided a screen for a projector comprising a screen film portion including a diffusion layer for diffusing light and a reflection layer, the screen film portion including a plurality of holes formed at upper, A bezel portion which covers a part of the front surface of the screen film portion, a frame portion which is disposed on the rear surface of the screen film portion and which is engaged with the bezel portion, And the end portion of the screen film portion is fixed to the side surface of the frame portion by bending at each end portion of the frame portion so as to satisfy the design and the price, The film can be perfectly flat for a distortion-free projection image.

Effects of the projector screen according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, there is an advantage that the thickness of the bezel can be reduced and the aesthetics of the screen can be improved.

Also, according to at least one of the embodiments of the present invention, a projection image without distortion can be realized while satisfying the design and the price.

Meanwhile, various other effects will be directly or implicitly disclosed in the detailed description according to the embodiment of the present invention to be described later.

Figures 1 and 2 schematically illustrate a display device system according to one embodiment of the present invention,
3 is a front view showing a screen for a projector according to an embodiment of the present invention,
4 is a sectional view showing the structure of a screen for a projector,
5 is a cross-sectional view showing the structure of a screen for a projector according to an embodiment of the present invention,
FIG. 6 is an enlarged view of the main part of FIG. 5,
7 is a view illustrating a screen film member of a display device according to an embodiment of the present invention,
FIG. 8 is an enlarged view of the main part of FIG. 7,
9 is a cross-sectional view schematically showing the structure of a screen film portion according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it is needless to say that the present invention is not limited to these embodiments and can be modified into various forms.

In the drawings, the same reference numerals are used for the same or similar parts throughout the specification. In the drawings, the thickness, the width, and the like are enlarged or reduced in order to make the description more clear, and the thickness, width, etc. of the present invention are not limited to those shown in the drawings.

Wherever certain parts of the specification are referred to as "comprising ", the description does not exclude other parts and may include other parts, unless specifically stated otherwise. In the entire specification, "front side " means a direction in which an image is displayed, or a direction toward a user, and" rear side "

The suffix "module" and " part "for components used in the following description are given merely for convenience of description and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

Fig. 1 is a conceptual view showing a display device system related to an embodiment of the present invention, Fig. 2 is a schematic side view of Fig. 1, and Fig. 3 is a front view showing a screen for a projector according to an embodiment of the present invention.

Referring to Figs. 1 and 2, light projected from a projector 10 fixed on a bottom surface B is imaged to output an image. The projector screen 100 may be fixed to the wall surface W as shown in FIG.

Referring to FIG. 3, a screen for a projector according to an exemplary embodiment of the present invention may include a bezel 110, a frame 120, and a screen film 130.

The projector 10 is a display device that allows an image generated by an image element or the like to pass through a projection lens or the like to be displayed on a projector screen 100. The projector 10 may be classified into a CRT (Cathode Ray Tube) projection system, an LCD (Liquid Crystal Display) projection system, an LCOS (Liquid Crystal On Silicon) projection system, and a DLP , Digital Light Processing) projection system.

The CRT projection method is a method of projecting the image signal of an external device amplified by a cathode ray tube to a screen, which is also referred to as a beam projector, and there is a single tube type having one CRT and a three tube type having three CRTs.

In addition, the LCD projection system uses the electro-optic properties of a liquid crystal as a display device. Light from red, green, and blue light sources passes through a transmissive liquid crystal panel and then synthesized into a single image through a polarizing prism. .

In addition, the ELCOS projection system uses an LCOS (reflection type liquid crystal panel) chip in which a silicon wafer is used in place of a lower glass in a conventional liquid crystal display (LCD) device and an electronic circuit is formed thereon. Green, and blue light sources are reflected from the surface of the elctic chip, then synthesized into a single image through a polarizing prism, and magnified and projected onto the screen.

In addition, the di elpe projection system uses a DMD (Digital Mirror Device) chip developed by Texas Instrument of America (USA). After the light from the lamp passes through the color wheel, It is a projection method.

However, the projector 10 related to the display device according to an embodiment of the present invention is not limited to the above-described projection method, and may include various other projection type image projection devices.

The projector 10 according to the present embodiment may be a projector having a very short focus of a front projection type.

The projector 10 may be installed at a position close to the projector screen 100 and may be installed on the side of the bottom surface F near the projector screen 100 as shown in FIGS. . However, the present invention is not limited thereto, and it may be installed in a ceiling scene within a range that satisfies a certain distance and angle condition with the projector screen 100.

According to an embodiment of the present invention, the screen 100 for a projector may be fixedly mounted on a wall surface W as shown in FIGS.

4 is a sectional view showing the structure of a screen for a projector.

4, the bezel portion 110 forms the outer front edge of the screen for the projector. The bezel 410 forms a front edge region of the screen for a projector and prevents the portion of the screen film 430 that is folded on the rear surface of the frame portion 420 from being viewed from the user side So that the appearance quality of the screen for a projector can be improved.

The end portion of the frame portion 420 includes a rounded end portion 421 that is rounded so that the screen film portion 430 can be bent to the rear using the structure of the frame.

The elastic member 425 is fixed to the hole formed in the screen film part 430 and the frame part 420 to apply tension to the screen film part 430 so that the screen film part 430 It can help to make it tight.

However, if the screen film portion 430 is bent 180 degrees at this time, the flatness of the screen film portion 430 may be reduced.

For example, a lift phenomenon may occur in areas a1, a2, and a3. Alternatively, the screen film part 430 may be bent roundly to the round end part 421 to form a space between the screen film part 430 and the frame part 420, 430 may be lowered.

On the other hand, the flatness degradation may lead to screen distortion upon screen projection.

Thus, the embodiment illustrated in FIG. 5 proposes a structure of a screen for a projector that improves the embodiment of FIG.

FIG. 5 is a sectional view showing the structure of a screen for a projector according to an embodiment of the present invention, and FIG. 6 is an enlarged view of an enlarged view of a portion C in FIG.

FIG. 7 is a view showing a screen film member of a display device according to an embodiment of the present invention, and FIG. 8 is an enlarged view of an enlarged view of a portion D in FIG.

Referring to the drawings, a screen for a projector according to an embodiment of the present invention includes a screen film portion (not shown) including a diffusion layer for diffusing light and a reflection layer, and including a plurality of holes 531 formed at upper, A bezel 510 which covers a part of the front surface of the screen film part 530 and a bezel part 510 which is disposed on the rear surface of the screen film part 530, And a plurality of elastic members 525 which penetrate the holes 531 at one end and are fixed to the frame part 520 and apply tension to the screen film part 510, . ≪ / RTI >

The end portion of the screen film portion 530 may be bent at each end of the frame portion 520 and fixed to the side surface of the frame portion 520.

That is, the end portion of the screen film portion 530 is not bent to the rear of the frame portion 520 by 180 degrees, but is bent only to an appropriate line among the side surfaces of the frame portion 520 at an acute angle, .

Meanwhile, the elastic member 525 may be positioned on the rear surface of the frame 520. Thus, the width of the bezel portion can be reduced as compared with when the elastic member applies tension on the same plane as the screen film member.

Meanwhile, the bezel 510 forms an outer front edge of the screen for a projector, and can cover an end of the screen film 530.

The bezel 510 forms a front edge region of the screen for a projector and prevents the portion of the screen film portion 530, which is folded at the side of the frame portion 520, So that the appearance quality of the screen for a projector can be improved.

The bezel 510 includes a front portion 511 covering a part of a front surface of the screen film portion, a rear portion 512 coupled to the frame, a front portion 511 and a rear portion 512 (Not shown).

According to an embodiment, the front portion 511 and the side portion 513 may be formed to have an acute angle to apply a pretension as indicated by 'B' in FIG. 5. In addition, the end of the front part 511 can be pressed against the screen film part 410 to help maintain the flatness.

In addition, according to an embodiment, the front portion 511 may include a protrusion 514 protruding in a direction toward the screen film portion 530. The protruding portion 514 can closely contact the screen film portion 530 with the frame portion 520.

According to an embodiment, the end portion of the screen film portion 510 may be bent 30 to 60 degrees.

For example, if the end portion of the screen film portion 510 is bent to be less than 30 degrees, a space for covering the end portion of the bent screen film portion 510 is required, so that the front width of the bezel portion 510 is reduced Can be reduced. Also, if the end portion of the screen film portion 510 is bent to a greater degree than 60 degrees, the flatness of the screen film portion 510 may decrease as the bending angle increases.

5 and 6, the frame part 520 includes a bending part 521 formed so as to have an inclination at a predetermined angle, and an end part of the screen film part 530 has a curved shape, May bend over the bending portion (521) of the bushing (520).

The bending portion 521 may be smaller than the end portion of the screen film portion 530 to be bent. The tension applied by the elastic member 525 acts on the screen film portion 530 so that the bending portion 521 is not disturbed so that the screen film portion 530 can be always kept in a tight state.

In order to prevent breakage of the film of the screen film part 530 when the elastic member 525 is connected, the stress can be dispersed by using the eyelet 540.

The through hole 531 formed in the screen film portion 530 is protected by an eyelet 540 formed of a material which is relatively durable as compared with a film such as a metal or a resin material. At this time, one end of the elastic member 525 may be hooked to the eyelet 540.

As shown in the drawing, the elastic member 525 is disposed on the rear side of the frame part 520, which is not visible to the user. One end of the elastic member 525 is engaged with and fixed to the frame part 520, So that the screen film portion 530 can be pulled by the elastic restoring force of the elastic member 525. [

Accordingly, the screen film portion 530 is stretched by the elastic restoring force of the elastic member 525, and the front side where the image is projected can be kept flat.

Meanwhile, according to the embodiment of the present invention, the bezel 510 and the frame 520 can be disassembled and assembled. Therefore, the bezel part 510 and the frame part 520 are shipped in the form of parts at the time of shipment, and can be assembled at the installation site.

Meanwhile, the bezel 510 may be formed of a lightweight metal such as aluminum, or may be formed of a synthetic resin material having excellent heat resistance. The bezel 510 may be connected to the frame 520 by a fastening member such as a screw, or may be coupled to the bezel 510 by providing a concave and convex structure capable of fitting.

The frame 520 may be assembled with the bezel 510 and may be divided into four parts vertically and horizontally, such as the bezel 510. For example, the bezel 510 and the frame 520 may be divided into four horizontally arranged vertical parts and left and right vertical parts, respectively.

According to an embodiment of the present invention, the frame part 520 is formed of a lightweight, high-strength material such as aluminum, and a space is formed in the frame part 520 to minimize the weight of the part. The frame part 520 can fix the screen film part 530 in a state where tension is applied by using the elastic member 525 on the surface that the user can not see.

Meanwhile, the frame part 520 is formed by assembling four frames of upper, lower, right and left sides. As shown in FIG. 3, an empty space portion which can not be seen by the user can be formed near the center. This is because it is not necessary to support the screen film part 530 in the vicinity of the center because all four sides of the screen film part 530 are pulled by pulling them all.

If the frame portion 520 is formed of aluminum as described above, there is no danger of flames spreading even when a fire occurs. Therefore, the flame retardancy is excellent, the durability is excellent and the stability against chemical damage is high. No chemical deformation occurs. On the other hand, when the screen for a projector for a long period of time is used, aluminum may react with oxygen in the air to cause whitening, so that the frame 520 may further perform fluorine coating or the like.

7, the screen film portion 530 may include a wing portion protruding in a positive (+) shape so that the upper, lower, left and right ends thereof can be bent and fixed to the side of the frame portion 520 .

On the other hand, a plurality of holes 531 may be formed at the protruded end-wing portion side at predetermined intervals.

8, a first member 540a and a second member 540b may be press fit to form an eyelet 540 in the hole 531. In addition, The eyelet 540 can prevent the hole 531 from being damaged.

7 and 8, the holes 531 are disposed at positions close to the upper, lower, left, and right end portions, and the holes 531 may be configured to be symmetrical with respect to each other. That is, it is preferable that the through holes 531 formed on the upper side, the lower side, the left side and the right side are formed in the same number. This is to allow the screen film portion 530 to be stretched in tension by the tension added by the elastic member 525.

On the other hand, the elastic member may be a tension spring. However, the present invention is not limited thereto, and any elastic member 525 can be used as long as it can apply tension to the screen film portion 530. Meanwhile, the elastic restoring force of the elastic member 525 may vary depending on the material properties of the screen film part 530, and the expansion rate depending on the temperature may be considered.

9 is a cross-sectional view schematically showing the structure of a screen film portion according to an embodiment of the present invention.

9, the screen film part 130 includes a hard coat layer a, a tint layer b, a diffusion layer c, a fresnel lens layer d, a thin film deposition reflective layer e, And a color coating layer (f).

The hard coat layer a may be in close contact with a surface of the frame portion 520 and may be a tint layer b, a diffusion layer c, a fresnel lens layer d, a thin film deposition reflective layer e, The color coating layer (f) may be sequentially laminated. At this time, the color coating layer (f) may be formed to surround the thin film deposition reflective layer (e) formed on the inclined surface of the Fresnel lens layer (d).

Therefore, the image output from the projector can be sequentially incident through the color coating layer (f). The color coating layer (f) functions to prevent oxidation of the thin film deposition reflective layer (e), and the color coating layer (f) has a black color .

By forming the thin film deposition reflective layer (e) on the inclined surface of the Fresnel lens layer (d), the brightness can be increased even in a bright space. Concretely, the luminance is improved by about 5.6 times and the peak gain can be improved by about 5.2 times by the inclined surface reflection effect.

As described above, a flatness is important for a precise reflection of light in a screen including an optical layer composed of an optical film or the like. Particularly, since the optical film is difficult to maintain flatness due to the warping of the screen due to the limitation of the film material itself, the frame and structure capable of supporting and tightly holding the film portion are more important.

According to an embodiment of the present invention, the end portion of the screen film portion is bended at each end of the frame portion to be fixed to the side surface of the frame portion, and tension can be imparted to maintain the flatness.

Further, as described above, the projector screen 100 can prevent thermal deformation, warping, and distortion due to temperature, humidity, and other environmental factors, and is excellent in various physical properties such as high rigidity, smoothness, light weight, incombustibility and durability Do.

Particularly, since the screen film portion 530 is wound around the frame unit 520 and fixed while the bezel portion 510 and the frame portion 520 are configured to be capable of being divided into four parts, the width of the bezel portion 510, It is possible to minimize the size.

It is also possible to ship the bezel 510, the frame 520 and the screen film 530 as separate components at the time of shipment, and it is possible for the operator to easily assemble the bezel 510, the shipping cost, Can be greatly reduced.

In addition, according to the embodiment of the present invention, it is easy to assemble and install without being restricted by the screen installation space for the projector, and has a beautiful appearance design.

According to at least one of the embodiments of the present invention, there is an advantage that the thickness of the bezel can be reduced and the aesthetics of the screen can be improved.

Also, according to at least one of the embodiments of the present invention, a projection image without distortion can be realized while satisfying the design and the price.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

100; Projector screens
510; Bezel
520; Frame unit
525; Elastic member
530; Screen film portion
531; hall
540; Eyelash

Claims (14)

A screen film portion including a diffusion layer for diffusing light and a reflection layer and including a plurality of holes formed at upper, lower, left, and right end portions;
A bezel portion covering a part of a front surface of the screen film portion;
A frame portion disposed on a rear surface of the screen film portion and coupled with the bezel portion; And
And a plurality of elastic members having one end penetrating the hole and the other end being fixed to the frame portion and applying a tension to the screen film portion,
Wherein an end portion of the screen film portion is bended at each end of the frame portion and is fixed to a side surface of the frame portion. The method according to claim 1,
Wherein the end portion of the screen film portion is bended at 30 to 60 degrees. The method according to claim 1,
Wherein the bezel portion covers an end portion of the screen film portion. The method according to claim 1,
Wherein the bezel portion includes a front portion that covers a part of a front surface of the screen film portion, a rear portion that engages with the frame, and a side portion that connects the front portion and the rear portion. 5. The method of claim 4,
Wherein the front surface portion and the side surface portion are formed to have an acute angle. 5. The method of claim 4,
Wherein the front portion includes a protrusion protruding in a direction toward the screen film portion. The method according to claim 1,
Wherein the bezel portion and the frame portion are divided into four parts, i.e., a horizontal part and a vertical part, respectively. The method according to claim 1,
The frame unit includes:
And a bending portion formed to have an inclination at a predetermined angle,
And an end portion of the screen film portion is bended above a bending portion of the frame portion. The method according to claim 1,
Wherein the bezel portion is injection-molded with synthetic resin, and the frame portion is formed of an aluminum material. The method according to claim 1,
Wherein the elastic member is a tension spring. The method according to claim 1,
The screen film portion
A hard coat layer;
A tint layer formed on one surface of the hard coat layer;
A diffusion layer formed on the tint layer;
A Fresnel lens layer formed on one surface of the diffusion layer;
A thin film deposition reflective layer of aluminum formed on an inclined surface of the Fresnel lens layer; And
And a color coating layer having a black color surrounding the thin film deposition reflective layer. The method according to claim 1,
The screen film portion
Each corner portion is cut out into a square shape and provided in a cross (+) shape,
Wherein the holes are coupled to a pair of mutually coupled metal eyelets. 13. The method of claim 12,
And one end of the elastic member is hooked to the eyelet. The method according to claim 1,
Wherein the elastic member is located on a rear surface of the frame portion.

KR1020150091417A 2015-06-26 2015-06-26 Screen for Projector KR101777856B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150091417A KR101777856B1 (en) 2015-06-26 2015-06-26 Screen for Projector

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KR20170001433A true KR20170001433A (en) 2017-01-04
KR101777856B1 KR101777856B1 (en) 2017-09-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112114489A (en) * 2019-06-19 2020-12-22 青岛海信激光显示股份有限公司 Projection screen, projection system and assembly method of projection screen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112114489A (en) * 2019-06-19 2020-12-22 青岛海信激光显示股份有限公司 Projection screen, projection system and assembly method of projection screen
WO2020253447A1 (en) * 2019-06-19 2020-12-24 青岛海信激光显示股份有限公司 Projection screen, projection system, and projection screen assembly method
US11782336B2 (en) 2019-06-19 2023-10-10 Hisense Laser Display Co., Ltd Projection screen, projection system and assembly method of projection screen

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