WO2003081907A1 - A portable folded projection system - Google Patents

A portable folded projection system Download PDF

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Publication number
WO2003081907A1
WO2003081907A1 PCT/KR2002/000890 KR0200890W WO03081907A1 WO 2003081907 A1 WO2003081907 A1 WO 2003081907A1 KR 0200890 W KR0200890 W KR 0200890W WO 03081907 A1 WO03081907 A1 WO 03081907A1
Authority
WO
WIPO (PCT)
Prior art keywords
mirror
screen
folded
case
plate
Prior art date
Application number
PCT/KR2002/000890
Other languages
French (fr)
Inventor
Jung-Ho Park
Original Assignee
La Vidia Co.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020020016236A external-priority patent/KR20030077247A/en
Priority claimed from KR2020020009022U external-priority patent/KR200278068Y1/en
Application filed by La Vidia Co. filed Critical La Vidia Co.
Priority to AU2002307685A priority Critical patent/AU2002307685A1/en
Publication of WO2003081907A1 publication Critical patent/WO2003081907A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof

Definitions

  • This invention relates to a portable folded projection system. More specifically, this invention relates to a portable folded projection system that can be moved as a bag, and projected on the built-in screen as well as on the outside screen by the simple operation.
  • the first generation display system is the present TV system using an electron gun and a vacuum tube.
  • the first generation TV System has a disadvantage that its volume is large and its weight is heavy because the vacuum tube is indispensable for controlling the scanning direction from the electron gun.
  • a more than 30-inch TV occupies the large space and cannot be moved by adults.
  • the heavy weight and large volume of the first generation TV System caused us to develop the second-generation display system.
  • lots of the companies manufacturing the display system have developed the various flat board display for the purpose of developing the lightweight, slimness, and a large sized screen.
  • a wall hanging display system, a liquid display system, and a projection display system through direct and indirect projection are the examples of the flat board display.
  • the second display systems have been seeking for the market corresponding to their characteristics and advantages.
  • This invention is one of the third display systems, the assembled transportable projection system adding the easily transportable function and the projecting function on the built in screen as well as on the outside screen by the simple operation to a rear screen projection display system.
  • the previous rear screen projection display system has the basic structure fixing the image projection device, mirror, and projection screen in a fixed space. And it is a general tendency to set up in a place.
  • the transportable projection display system which can be displayed whenever and wherever the customers need to watch the display system, has been required.
  • diverse transportable projection display systems have been presented.
  • the applicant presented a transportable projection display system (Korea Patent Laid- open Number 2001-38252 in addition to U.S.A. Patent Number 5,622,419, Korea Patent Laid-open Number 1993-13855, Korea Patent Laid-open Number 1990- 14909, and Japan Patent Laid-open Number Pyungsung 5-100314) for a patent.
  • Korea Patent Laid-open Number 1990-14909 has the structure projecting the image through the built in screen as well as through the outside screen when necessary. But unlike this invention the above mentioned projection display system, Korea Patent Laid-open Number 1990-14909, didn't adopt the projection screen and had the affection of the light from outside. So it is impossible to watch the transparent image. And the direction of the system should be inconveniently changed when we need to change the system to watch the image through the built in screen or through the outside screen.
  • the present invention was devised to solve the above-noted problems and it is an object of this invention to provide a portable folded projection system to supply the transparent image by not being affected from the outside light and to get the multiple projecting function on the built in screen as well as on the outside screen by the simple operation, opening and closing a supplementary cover.
  • Fig. 1 illustrates an opening structure of the first example of the portable folded projection system according to the present invention.
  • Fig. 2 is the folded structure of the first example of the portable folded projection system according to the present invention.
  • Fig. 3 is the system structure of the second example of the portable folded projection system according to the present invention when projecting the image through built-in screen and mirror.
  • Fig. 4 is the system structure of the second example of the portable folded projection system in the state of being folded according to the present invention when projecting the image on the outside screen.
  • Fig. 5 is the picture showing that the first mirror set up the designated position by the stopper according to the present invention.
  • Fig. 6 is the picture of the folded state when the folded fan style plates exclude the outside light.
  • Fig. 7 is the picture of the opening state of the folded fan style plates excluding the outside light.
  • Fig. 8 is the rear picture for showing the means of setting up and folding the screen.
  • Fig. 9 is the picture for showing the means of setting up and folding the screen and the first mirror.
  • Fig. 10 is a plain figure, a base figure and a side figure of the fixed bearing plate as a means of setting up and folding the screen.
  • the present invention devised to solve the above-noted problems has following structure.
  • the first embodiment of the present invention comprises a bag type portable case separated from the cover, and a projector fixed by a mount in the case for projecting the image through a lens, and an opaque projection screen set up to the opened direction of the case cover of in three dimensions [3-D] and folded inside again to display the projected image from said projector to the users, and a screen plate attached to said screen at the front side, having the sloping projected structure becoming narrower from upward to downward at the rear side, and set up in three dimensions and folded inside again with the screen, and a first mirror, standing opposite to the screen, for reflecting the projected image from the projector to the screen through light path, wherein said first mirror is fixed in said case and set up to the upward direction of the opened case cover in three dimensions [3-D] and folded inside again to, and a first mirror plate attached to said first mirror, protecting the first mirror, setting up with the first mirror in three dimensions [3-D], folded inside again with it, and combined with the end of the fixed stand projected from the bottom of the case to upward, and
  • a short focusing lens having a short focusing length is proper to the first embodiment of the projection system according to the present invention.
  • the second embodiment of the present invention comprises a bag type portable case separated from the cover, and a projector fixed by a mount in the case for projecting the image through a lens, and an opaque projection screen set up to the opened direction of the case cover of in three dimensions [3-D] and folded inside again to display the projected image from said projector to the users, and a screen plate attached to said screen at the front side, having the sloping projected structure becoming narrower from upward to downward at the rear side, and set up in three dimensions and folded inside again with the screen, and a first mirror, standing opposite to the screen, for reflecting the projected image from the projector to the screen through light path, wherein said first mirror is fixed in said case and set up to the upward direction of the opened case cover in three dimensions [3-D] and folded inside again to, and a first mirror plate attached to said first mirror, protecting the first mirror, setting up with the first mirror in three dimensions [3-D], folded inside again with it, and combined with the end of the fixed stand projected from the bottom of the case to upward, and a
  • the projection system according to the present invention further comprises a terminal board on the outside of the case to receive signals from the outside image or audio play system.
  • the projection system according to the present invention further comprises a ventilation opening to give off heat in the case to the outside, and a filter in the ventilation opening for preventing dust from coming from outside and shutting the noise arising from working the projector in the case.
  • the portable folded projection system further comprises a "- 1 -" type sliding rail floating in the air, combined with the projected supporting stand from both the walls in the case, and having a projected place declining from the screen to the first mirror along both the walls of the case, and a bearing plate having several vertically arrayed bearings on the square plate being a certain distance away from the inside walls of the case between the vertical sides of the "- 1 -" type sliding rail, having column structure that the diameter of the bearings on the center part is larger than that of the above mentioned bearings on the both sides, having the structure sliding along with the bottom side with the center part of the parallel arrayed bearings caught in the bottom side of the "- 1 -" sliding rail, and having the groove coming in and out from outside along with the above mentioned parallel arrayed bearings, and a first mirror switch as a bar that one side is connected by the first mirror plate by a hinge and the other side is connected with the one side of said bearing plate, having the guide slot pier
  • the portable folded projection system further comprises a first screen protection layer attached to a side of said first mirror plate facing to the screen surface for protecting the screen in the folded state where the projection system having a structure that the first mirror and the first mirror plate are folded first and then the screen is folded on them when the first mirror plate and the screen are folded, and a second screen protection layer forming horizontally in inside of the case cover faced to the screen in case of closing the case cover on folded screen and closing the case in storage or movement.
  • the means of setting up and folding the first mirror and the second mirror is a hinge or a gas absorber. And it is proper that the each lower part of the light shielding plate is connected by an axis so that can be opened and folded like a fan to be folded by forming seam one by one from the inside.
  • the stopper for the first mirror and the second mirror is a fixed thing protruded at the back of the mirror plate to catch it when the mirror plate is rotated and set up.
  • the first mirror plate have another protruded part in the lower part in order to fix the maximum degree of the first mirror plate's opening angle by the protruded part is caught in the screen supporter to support the first mirror when the first mirror is rotated and set up, and the stopper for said second mirror is the fixed thing protruded from the bottom part of the case at the back of the second mirror plate when the second mirror plate is set up.
  • the image projected through the projector (10) reflected by the second mirror (41) reflects the first mirror (42) and the reflected image is displayed through the screen (12).
  • the first mirror (42) needs to have a means to make it fix to open it to the exact degree because it affects the quality of the projected image unless it is not fixed in the exact degree.
  • the means is the stopper (50) shown in the figure 5.
  • the stopper for the first mirror and the second mirror shown in the left picture should be the fixed thing projected at the back of the mirror plate when the mirror plate is rotated and set up to catch it.
  • the above projection is caught at the screen supporter and set up the maximum degree when the first mirror plate is rotated and set up, for the above first mirror plate has another projection in the lower part shown on the right picture.
  • the stopper for above-mentioned second mirror can be the fixed thing projected from the bottom part of the case at the back of the second mirror plate to catch the plate when the second mirror plate is set up like the picture shown the left picture.
  • Figure reference numberl3 is the screen plate, the numberl5 is the case, and the number 52 is the light shielding plate.
  • the image projected through the projector (10) is directly projected to the outside screen not through the second mirror (41). At this time the second mirror is folded and the supplementary cover is opened.
  • the first screen protection layer (80) is attached to a side of the above mirror plate (30) attached to the screen to protect the screen in the folded state.
  • the second screen protection layer (90) forming horizontally is inside of the case cover faced to the screen in case of closing the case cover (17) on folded screen and closing the case in storage or movement.
  • the fan style light shielding plate shown in Figure 6 and 7 is possible to install as an example of the light shielding plate by the invention.
  • the above light shielding plate is set up in the folded state with the screen when the screen is set up. After the screen was set up, the light shielding plate has the structure to have the side and the upper part of the case tightly closed to shut outside light, and the inside of the light shielding plate is painted in black to prevent the reflection of the light.
  • One axis is connected to the first mirror plate (42) by the hinge. And the other axis is a bar(C) connected with the one side of the above-mentioned bearing plate (F).
  • the center of the bar connected with the bearing plate (F) has the guide slot (B) pierced a distance.
  • the bearing plate is connected with the above mentioned guide slot (B) connected with the bearing projected from a side of the bearing plate.
  • the first mirror switch makes the first mirror (42) opened and folded(C), with connected bearings moving along the above mentioned guide slot,
  • the Figure 8 is the one shown under the bearing plate (F).
  • the bearing plate is two bars connected each other to the sliding direction of the bearings plate so that they can come in and out along with the slot (G) of the above mentioned bearing plate like the figure. It is under the "- 1 -" type sliding rail(A), and each bar has the structure that the center part is projected upward and both sides descend downward. By the hinge (I) an end of the bar connects two folded bars (H) each other.
  • the screen is fixed caught the bar (J) to the direction of the bearing plate in the slot (G) of the bearing plate when the screen is wholly set up as the streamline descending exterior structure (J, K) fixed an end of each folded bar (H) which is not the connected part by the hinge (I).
  • the bar (J) to the direction of the bearing plate is unlocked, the above-mentioned bearing plate becomes sliding along with the sliding rail (A). Beginning from the sliding rail, the folded bar goes gradually into the slot of the bearing plate and the connected part of the folded bar by the hinge descends downward at the same time. And the screen is folded.
  • the bar (K) to the direction of the first mirror plate is caught in the slot of the bearing plate and fix the screen by the locks (J, K).
  • Figure 10 shows the side view, top view, and bottom view of the bearing plate as a means of setting up and folding the screen.
  • Figure reference number D shows the screen supporter. One side is connected with the fixed bearing plate (F) and the other side with the screen plate (13). When the screen is set up, the screen supporting stand supports the screen. And the movement of the bearing plate folds the screen.
  • Figure reference number L shows the button on the above mentioned screen plate to give pressure from outside when the screen is folded again. And it shows a connection bar (M) to separate the lock (K) caught in the bearing plate from the bearing plate (F) by the pressure of the above-mentioned button.
  • the easily assembled transportable projection system has some advantages: small size, lightweight and easy transportation makes it possible to move and display whenever and wherever needed.
  • the assembled transportable projection system by the invention can be transmitted the transparent image without light interference from outside.
  • the invention has an advantage having the multiple function; rear projection system transmitting the image through the screen inside and front projection system transmitting the image to the outside screen simply by opening and closing the supplementary cover.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)

Abstract

The present invention is a portable folded projection system to transmit image through the screen in the bag being able to be movable by simple setting.The easily assembled portable folded projection system can be transmitted the transparent image without light interference from outside. And the invention has an advantage having the multiple function; rear projection system transmitting the image through the screen inside and front projection system transmitting the image to the outside screen simply by opening and closing the supplementary cover.

Description

A PORTABLE FOLDED PROJECTION SYSTEM
BACKGROUND OF THE INVENTION Field of the Invention
This invention relates to a portable folded projection system. More specifically, this invention relates to a portable folded projection system that can be moved as a bag, and projected on the built-in screen as well as on the outside screen by the simple operation.
Description of the Related Arts
With the advancement of the quality of life the interest in the household electric appliances, especially in the display system becomes growing. Above all the beginning of the broadcasting of the HDTV will have a great change in the displaying market.
It can be said that the first generation display system is the present TV system using an electron gun and a vacuum tube. The first generation TV System has a disadvantage that its volume is large and its weight is heavy because the vacuum tube is indispensable for controlling the scanning direction from the electron gun. A more than 30-inch TV occupies the large space and cannot be moved by adults. The heavy weight and large volume of the first generation TV System caused us to develop the second-generation display system. With the response to this demand lots of the companies manufacturing the display system have developed the various flat board display for the purpose of developing the lightweight, slimness, and a large sized screen. A wall hanging display system, a liquid display system, and a projection display system through direct and indirect projection are the examples of the flat board display. The second display systems have been seeking for the market corresponding to their characteristics and advantages.
By the way the consumers' dissatisfaction with the second display systems led to the third generation display system, high definition display system. In addition there is a trend that lots of companies add the diverse function and various uses to the third display systems.
This invention is one of the third display systems, the assembled transportable projection system adding the easily transportable function and the projecting function on the built in screen as well as on the outside screen by the simple operation to a rear screen projection display system.
Meanwhile the previous rear screen projection display system has the basic structure fixing the image projection device, mirror, and projection screen in a fixed space. And it is a general tendency to set up in a place. But as we live in the modern world, the transportable projection display system, which can be displayed whenever and wherever the customers need to watch the display system, has been required. To respond to this demand diverse transportable projection display systems have been presented. As one of them, the applicant presented a transportable projection display system (Korea Patent Laid- open Number 2001-38252 in addition to U.S.A. Patent Number 5,622,419, Korea Patent Laid-open Number 1993-13855, Korea Patent Laid-open Number 1990- 14909, and Japan Patent Laid-open Number Pyungsung 5-100314) for a patent.
However, the transportable projection display systems besides Korea Patent
Laid-open Number 1990-14909 above mentioned have the structures projected only through the built in screen.
On the contrary Korea Patent Laid-open Number 1990-14909 has the structure projecting the image through the built in screen as well as through the outside screen when necessary. But unlike this invention the above mentioned projection display system, Korea Patent Laid-open Number 1990-14909, didn't adopt the projection screen and had the affection of the light from outside. So it is impossible to watch the transparent image. And the direction of the system should be inconveniently changed when we need to change the system to watch the image through the built in screen or through the outside screen. SUMMARY OF THE INVENTION
The present invention was devised to solve the above-noted problems and it is an object of this invention to provide a portable folded projection system to supply the transparent image by not being affected from the outside light and to get the multiple projecting function on the built in screen as well as on the outside screen by the simple operation, opening and closing a supplementary cover.
BRIEF DESCRIPTION OF THE DRAWINGS
The object, other features and advantages of the present invention will become more apparent by describing the preferable embodiment thereof with reference to the accompanying drawings, in which:
Fig. 1 illustrates an opening structure of the first example of the portable folded projection system according to the present invention.
Fig. 2 is the folded structure of the first example of the portable folded projection system according to the present invention.
Fig. 3 is the system structure of the second example of the portable folded projection system according to the present invention when projecting the image through built-in screen and mirror.
Fig. 4 is the system structure of the second example of the portable folded projection system in the state of being folded according to the present invention when projecting the image on the outside screen.
Fig. 5 is the picture showing that the first mirror set up the designated position by the stopper according to the present invention. Fig. 6 is the picture of the folded state when the folded fan style plates exclude the outside light.
Fig. 7 is the picture of the opening state of the folded fan style plates excluding the outside light. Fig. 8 is the rear picture for showing the means of setting up and folding the screen.
Fig. 9 is the picture for showing the means of setting up and folding the screen and the first mirror.
Fig. 10 is a plain figure, a base figure and a side figure of the fixed bearing plate as a means of setting up and folding the screen.
DESCRIPTION OF THE PREFFERED EMBODIMENTS
The present invention devised to solve the above-noted problems has following structure.
That is, the first embodiment of the present invention comprises a bag type portable case separated from the cover, and a projector fixed by a mount in the case for projecting the image through a lens, and an opaque projection screen set up to the opened direction of the case cover of in three dimensions [3-D] and folded inside again to display the projected image from said projector to the users, and a screen plate attached to said screen at the front side, having the sloping projected structure becoming narrower from upward to downward at the rear side, and set up in three dimensions and folded inside again with the screen, and a first mirror, standing opposite to the screen, for reflecting the projected image from the projector to the screen through light path, wherein said first mirror is fixed in said case and set up to the upward direction of the opened case cover in three dimensions [3-D] and folded inside again to, and a first mirror plate attached to said first mirror, protecting the first mirror, setting up with the first mirror in three dimensions [3-D], folded inside again with it, and combined with the end of the fixed stand projected from the bottom of the case to upward, and a stopper for fixing the degree to the highest in setting up the first mirror, wherein the stopper is fixed on the bottom of the case to catch a part of the bottom of the first mirror plate, and a folded light shielding plate painted dark light absorbing material on inside surface of the plate for protecting of light reflection, set up in the folded state at the inside of the projected part of the screen plate in setting up said screen, and having the side and the upper part of the case closed tightly to shut outside light by way of spreading the folded part to the direction of said first mirror after setting up the screen and fixing, and wheels fixed on a side of the case to make movement of the case convenient, and a handle to pull the case.
And a short focusing lens having a short focusing length is proper to the first embodiment of the projection system according to the present invention.
And the second embodiment of the present invention comprises a bag type portable case separated from the cover, and a projector fixed by a mount in the case for projecting the image through a lens, and an opaque projection screen set up to the opened direction of the case cover of in three dimensions [3-D] and folded inside again to display the projected image from said projector to the users, and a screen plate attached to said screen at the front side, having the sloping projected structure becoming narrower from upward to downward at the rear side, and set up in three dimensions and folded inside again with the screen, and a first mirror, standing opposite to the screen, for reflecting the projected image from the projector to the screen through light path, wherein said first mirror is fixed in said case and set up to the upward direction of the opened case cover in three dimensions [3-D] and folded inside again to, and a first mirror plate attached to said first mirror, protecting the first mirror, setting up with the first mirror in three dimensions [3-D], folded inside again with it, and combined with the end of the fixed stand projected from the bottom of the case to upward, and a first stopper for fixing the degree to the highest in setting up the first mirror, wherein the stopper is fixed on the bottom of the case to catch a part of the bottom of the first mirror plate, and a second mirror to reflect the projected image through the above mentioned projector in set up, which is fixed between the first mirror and the projector so that it can be folded and set up to the direction of the bottom of the case, and a second mirror plate attached to the second mirror to protect the second mirror so that it can be set up with the second mirror in three dimensions [3-D] and folded inside again with it, and a second stopper for fixing the degree to the highest in setting up the second mirror, wherein the second stopper is fixed on the bottom of the case to catch a part of the bottom of the mirror plate, and a supplementary cover for directly projecting beam to the outside not through the first mirror when is opened and is folded said second mirror, wherein the supplementary cover is formed on a side of the case lower to the set up screen, and a folded light shielding plate painted dark light absorbing material on inside surface of the plate for protecting of light reflection, set up in the folded state at the inside of the projected part of the screen plate in setting up said screen, and having the side and the upper part of the case closed tightly to shut outside light by way of spreading the folded part to the direction of said first mirror after setting up the screen and fixing, and wheels fixed on a side of the case to make movement of the case convenient, and a handle to pull the case. And a standard lens having a standard focusing length is proper to the second embodiment of the projection system according to the present invention.
And it is proper that the projection system according to the present invention further comprises a terminal board on the outside of the case to receive signals from the outside image or audio play system.
Also, it is proper to expose the terminal board outside of the case in case of the image or audio play system is fixed in the inside of the case.
And it is proper that the projection system according to the present invention further comprises a ventilation opening to give off heat in the case to the outside, and a filter in the ventilation opening for preventing dust from coming from outside and shutting the noise arising from working the projector in the case.
And it is proper that the portable folded projection system according to the first and second embodiment of the present invention further comprises a "-1-" type sliding rail floating in the air, combined with the projected supporting stand from both the walls in the case, and having a projected place declining from the screen to the first mirror along both the walls of the case, and a bearing plate having several vertically arrayed bearings on the square plate being a certain distance away from the inside walls of the case between the vertical sides of the "-1-" type sliding rail, having column structure that the diameter of the bearings on the center part is larger than that of the above mentioned bearings on the both sides, having the structure sliding along with the bottom side with the center part of the parallel arrayed bearings caught in the bottom side of the "-1-" sliding rail, and having the groove coming in and out from outside along with the above mentioned parallel arrayed bearings, and a first mirror switch as a bar that one side is connected by the first mirror plate by a hinge and the other side is connected with the one side of said bearing plate, having the guide slot piercing the center of the bar connected with the bearing plate to a fixed distance, having the structure that the bearings projected from a side of the bearing plate is connected with said guide slot, and making the first mirror opened and folded with connected bearings moving along said guide slot, and a screen supporter that one side is connected with said bearing plate and the other side with the screen plate, which makes the screen folded and supports screen at the same time through the movement of the bearings when the screen is set up or folded, and two folded bars , as two bars connected each other to the sliding direction of the bearing plate so that they can come in and out along with the slot of said bearing plate, whose end of the bar connected each other by a hinge, situated under the "-1-" type sliding rail, and having the structure that the center part of each bar is projected upward and both sides descend downward, and a locking means having shaped of streamline descending exterior fixed an end of each folded bar which is not the connected part by the hinge, wherein the locking means to the direction of the bearing plate is caught in the slot of the bearing plate and make the screen is fixed when the screen is wholly set up, and, in case of screen folding, the locking means to the direction of the bearing plate is unlocked and make the bearings plate slide along the sliding rail resulting to the screen is folded by the folded bar goes gradually into the slot of the bearing plate beginning from the sliding rail and the connected part of the folded bar by the hinge descends downward at the same time, and the locking means to the direction of the first mirror plate is caught in the slot of the bearing plate and make the screen is fixed when the screen is wholly folded, and a button on the screen plate to give pressure from outside when the screen is folded again after being wholly set up, and a connection bar to separate the lock caught in the bearing plate from the bearing plate by the pressure of said button.
And it is more proper that the portable folded projection system according to the present invention further comprises a first screen protection layer attached to a side of said first mirror plate facing to the screen surface for protecting the screen in the folded state where the projection system having a structure that the first mirror and the first mirror plate are folded first and then the screen is folded on them when the first mirror plate and the screen are folded, and a second screen protection layer forming horizontally in inside of the case cover faced to the screen in case of closing the case cover on folded screen and closing the case in storage or movement.
At this time, the means of setting up and folding the first mirror and the second mirror is a hinge or a gas absorber. And it is proper that the each lower part of the light shielding plate is connected by an axis so that can be opened and folded like a fan to be folded by forming seam one by one from the inside.
And it is possible that the stopper for the first mirror and the second mirror is a fixed thing protruded at the back of the mirror plate to catch it when the mirror plate is rotated and set up.
Also, it is possible that the first mirror plate have another protruded part in the lower part in order to fix the maximum degree of the first mirror plate's opening angle by the protruded part is caught in the screen supporter to support the first mirror when the first mirror is rotated and set up, and the stopper for said second mirror is the fixed thing protruded from the bottom part of the case at the back of the second mirror plate when the second mirror plate is set up.
Referring the Fig. 3 and 4, the second embodiment of the present projection system according to this invention, the structure of the present projection system according to this invention will be explained in detail.
First in case of the projection through the screen in the case, the image projected through the projector (10) reflected by the second mirror (41) reflects the first mirror (42) and the reflected image is displayed through the screen (12). For convenience' sake light shielding plate and screen protection layer are not shown in the figure. While the above mentioned second mirror (41) fixed to the bottom of the case has no problems, the first mirror (42) needs to have a means to make it fix to open it to the exact degree because it affects the quality of the projected image unless it is not fixed in the exact degree. The means is the stopper (50) shown in the figure 5. The stopper for the first mirror and the second mirror shown in the left picture should be the fixed thing projected at the back of the mirror plate when the mirror plate is rotated and set up to catch it. And another example is the structure of a stopper; the above projection is caught at the screen supporter and set up the maximum degree when the first mirror plate is rotated and set up, for the above first mirror plate has another projection in the lower part shown on the right picture. The stopper for above-mentioned second mirror can be the fixed thing projected from the bottom part of the case at the back of the second mirror plate to catch the plate when the second mirror plate is set up like the picture shown the left picture.
Figure reference numberl3 is the screen plate, the numberl5 is the case, and the number 52 is the light shielding plate.
Next in Figure 4, the image is projected through the outside screen.
Whether the screen (12) and the first mirror (42) are open or not, the image projected through the projector (10) is directly projected to the outside screen not through the second mirror (41). At this time the second mirror is folded and the supplementary cover is opened.
And as the Figure shows, the first mirror (42) and the first mirror plate
(30) are folded first and then the screen (12) is folded on them when the first mirror plate (30) and the screen (12) are folded. The first screen protection layer (80) is attached to a side of the above mirror plate (30) attached to the screen to protect the screen in the folded state. The second screen protection layer (90) forming horizontally is inside of the case cover faced to the screen in case of closing the case cover (17) on folded screen and closing the case in storage or movement.
At this time the fan style light shielding plate shown in Figure 6 and 7 is possible to install as an example of the light shielding plate by the invention. The above light shielding plate is set up in the folded state with the screen when the screen is set up. After the screen was set up, the light shielding plate has the structure to have the side and the upper part of the case tightly closed to shut outside light, and the inside of the light shielding plate is painted in black to prevent the reflection of the light.
Next, referring the Figure 8 to 10, there is a detail explanation of setting up and folding the screen. First, in the Figure 9, it has a projected place(A) declining from the screen to the first mirror as the "->-" type sliding rail floating in the air and combined with the projected supporting stand from both the walls in the case. A bearing plate being a certain distance away from the inside walls of the case has several vertically arrayed bearings(E) between the vertical of the "J-" type sliding rail. Compared with diameter of the bearings on the center part, each of the above-mentioned bearings on both sides has column structure having the larger diameter. The center part of the parallel arrayed bearings caught in the bottom side of the "J-" sliding rail has the structure sliding along with the bottom side. The bearing plate has the groove (Figure 8, G) coming in and out from outside along with the above mentioned parallel arrayed bearings.
One axis is connected to the first mirror plate (42) by the hinge. And the other axis is a bar(C) connected with the one side of the above-mentioned bearing plate (F). The center of the bar connected with the bearing plate (F) has the guide slot (B) pierced a distance. The bearing plate is connected with the above mentioned guide slot (B) connected with the bearing projected from a side of the bearing plate. The first mirror switch makes the first mirror (42) opened and folded(C), with connected bearings moving along the above mentioned guide slot,
The Figure 8 is the one shown under the bearing plate (F). The bearing plate is two bars connected each other to the sliding direction of the bearings plate so that they can come in and out along with the slot (G) of the above mentioned bearing plate like the figure. It is under the "-1-" type sliding rail(A), and each bar has the structure that the center part is projected upward and both sides descend downward. By the hinge (I) an end of the bar connects two folded bars (H) each other.
The screen is fixed caught the bar (J) to the direction of the bearing plate in the slot (G) of the bearing plate when the screen is wholly set up as the streamline descending exterior structure (J, K) fixed an end of each folded bar (H) which is not the connected part by the hinge (I). When the screen is folded, the bar (J) to the direction of the bearing plate is unlocked, the above-mentioned bearing plate becomes sliding along with the sliding rail (A). Beginning from the sliding rail, the folded bar goes gradually into the slot of the bearing plate and the connected part of the folded bar by the hinge descends downward at the same time. And the screen is folded. When the screen is wholly folded, the bar (K) to the direction of the first mirror plate is caught in the slot of the bearing plate and fix the screen by the locks (J, K).
And Figure 10 shows the side view, top view, and bottom view of the bearing plate as a means of setting up and folding the screen.
Figure reference number D shows the screen supporter. One side is connected with the fixed bearing plate (F) and the other side with the screen plate (13). When the screen is set up, the screen supporting stand supports the screen. And the movement of the bearing plate folds the screen.
Figure reference number L shows the button on the above mentioned screen plate to give pressure from outside when the screen is folded again. And it shows a connection bar (M) to separate the lock (K) caught in the bearing plate from the bearing plate (F) by the pressure of the above-mentioned button.
The easily assembled transportable projection system has some advantages: small size, lightweight and easy transportation makes it possible to move and display whenever and wherever needed. In addition, the assembled transportable projection system by the invention can be transmitted the transparent image without light interference from outside. And the invention has an advantage having the multiple function; rear projection system transmitting the image through the screen inside and front projection system transmitting the image to the outside screen simply by opening and closing the supplementary cover.

Claims

WHAT IS CLAIMED IS:
1. A portable folded projection system comprising of: a bag type portable case separated from the cover; a projector fixed by a mount in the case for projecting the image through a lens; an opaque projection screen set up to the opened direction of the case cover of in three dimensions [3-D] and folded inside again to display the projected image from said projector to the users; a screen plate attached to said screen at the front side, having the sloping projected structure becoming narrower from upward to downward at the rear side, and set up in three dimensions and folded inside again with the screen; a first mirror, standing opposite to the screen, for reflecting the projected image from the projector to the screen through light path, wherein said first mirror is fixed in said case and set up to the upward direction of the opened case cover in three dimensions [3-D] and folded inside again to; a first mirror plate attached to said first mirror, protecting the first mirror, setting up with the first mirror in three dimensions [3-D], folded inside again with it, and combined with the end of the fixed stand projected from the bottom of the case to upward; a stopper for fixing the degree to the highest in setting up the first mirror, wherein the stopper is fixed on the bottom of the case to catch a part of the bottom of the first mirror plate; a folded light shielding plate painted dark light absorbing material on inside surface of the plate for protecting of light reflection, set up in the folded state at the inside of the projected part of the screen plate in setting up said screen, and having the side and the upper part of the case closed tightly to shut outside light by way of spreading the folded part to the direction of said first mirror after setting up the screen and fixing; wheels fixed on a side of the case to make movement of the case convenient; a handle to pull the case.
2. A portable folded projection system comprising of: a bag type portable case separated from the cover; a projector fixed by a mount in the case for projecting the image through a lens; an opaque projection screen set up to the opened direction of the case cover of in three dimensions [3-D] and folded inside again to display the projected image from said projector to the users; a screen plate attached to said screen at the front side, having the sloping projected structure becoming narrower from upward to downward at the rear side, and set up in three dimensions and folded inside again with the screen; a first mirror, standing opposite to the screen, for reflecting the projected image from the projector to the screen through light path, wherein said first mirror is fixed in said case and set up to the upward direction of the opened case cover in three dimensions [3-D] and folded inside again to; a first mirror plate attached to said first mirror, protecting the first mirror, setting up with the first mirror in three dimensions [3-D], folded inside again with it, and combined with the end of the fixed stand projected from the bottom of the case to upward; a first stopper for fixing the degree to the highest in setting up the first mirror, wherein the stopper is fixed on the bottom of the case to catch a part of the bottom of the first mirror plate; a second mirror to reflect the projected image through the above mentioned projector in set up, which is fixed between the first mirror and the projector so that it can be folded and set up to the direction of the bottom of the case; a second mirror plate attached to the second mirror to protect the second mirror so that it can be set up with the second mirror in three dimensions [3-D] and folded inside again with it; a second stopper for fixing the degree to the highest in setting up the second mirror, wherein the second stopper is fixed on the bottom of the case to catch a part of the bottom of the mirror plate; a supplementary cover for directly projecting beam to the outside not through the first mirror when is opened and is folded said second mirror, wherein the supplementary cover is formed on a side of the case lower to the set up screen; a folded light shielding plate painted dark light absorbing material on inside surface of the plate for protecting of light reflection, set up in the folded state at the inside of the projected part of the screen plate in setting up said screen, and having the side and the upper part of the case closed tightly to shut outside light by way of spreading the folded part to the direction of said first mirror after setting up the screen and fixing; wheels fixed on a side of the case to make movement of the case convenient; a handle to pull the case.
3. A portable folded projection system as set forth in one of the claim 1 or 2, wherein the projection system further comprising of: a "-J-" type sliding rail floating in the air, combined with the projected supporting stand from both the walls in the case, and having a projected place declining from the screen to the first mirror along both the walls of the case; a bearing plate having several vertically arrayed bearings on the square plate being a certain distance away from the inside walls of the case between the vertical sides of the "-1-" type sliding rail, having column structure that the diameter of the bearings on the center part is larger than that of the above mentioned bearings on the both sides, having the structure sliding along with the bottom side with the center part of the parallel arrayed bearings caught in the bottom side of the " -1-" sliding rail, and having the groove coming in and out from outside along with the above mentioned parallel arrayed bearings; a first mirror switch as a bar that one side is connected by the first mirror plate by a hinge and the other side is connected with the one side of said bearing plate, having the guide slot piercing the center of the bar connected with the bearing plate to a fixed distance, having the structure that the bearings projected from a side of the bearing plate is connected with said guide slot, and making the first mirror opened and folded with connected bearings moving along said guide slot; a screen supporter that one side is connected with said bearing plate and the other side with the screen plate, which makes the screen folded and supports screen at the same time through the movement of the bearings when the screen is set up or folded; two folded bars , as two bars connected each other to the sliding direction of the bearing plate so that they can come in and out along with the slot of said bearing plate, whose end of the bar connected each other by a hinge, situated under the "J-" type sliding rail, and having the structure that the center part of each bar is projected upward and both sides descend downward; a locking means having shaped of streamline descending exterior fixed an end of each folded bar which is not the connected part by the hinge, wherein the locking means to the direction of the bearing plate is caught in the slot of the bearing plate and make the screen is fixed when the screen is wholly set up, and, in case of screen folding, the locking means to the direction of the bearing plate is unlocked and make the bearings plate slide along the sliding rail resulting to the screen is folded by the folded bar goes gradually into the slot of the bearing plate beginning from the sliding rail and the connected part of the folded bar by the hinge descends downward at the same time, and the locking means to the direction of the first mirror plate is caught in the slot of the bearing plate and make the screen is fixed when the screen is wholly folded; a button on the screen plate to give pressure from outside when the screen is folded again after being wholly set up; a connection bar to separate the lock caught in the bearing plate from the bearing plate by the pressure of said button.
4. A portable folded projection system as set forth in claim 3, wherein the projection system further comprising of: a first screen protection layer attached to a side of said first mirror plate facing to the screen surface for protecting the screen in the folded state where the projection system having a structure that the first mirror and the first mirror plate are folded first and then the screen is folded on them when the first mirror plate and the screen are folded; a second screen protection layer forming horizontally in inside of the case cover faced to the screen in case of closing the case cover on folded screen and closing the case in storage or movement.
5. A portable folded projection system as set forth in claim 4, wherein the means of setting up and folding the first mirror and the second mirror is a hinge.
6. A portable folded projection system as set forth in claim 4, wherein the means of setting up and folding the first mirror and the second mirror is a gas absorber.
7, A portable folded projection system as set forth in one of the claim 1 or 2, wherein the each lower part of the light shielding plate is connected by an axis so that it can be opened and folded like a fan to be folded by forming seam one by one from the inside.
8. A portable folded projection system as set forth in claim 1, wherein the lens of the projector is a short focusing lens having a short focusing length.
9. A portable folded projection system as set forth in claim 2, wherein the lens of the projector is a standard lens having a standard focusing length.
10. A portable folded projection system as set forth in one of the claim 1 or 2, wherein the stopper for the first mirror and the second mirror is a fixed thing protruded at the back of the mirror plate to catch it when the mirror plate is rotated and set up.
11. A portable folded projection system as set forth in one of the claim 1 or 2, wherein the first mirror plate have another protruded part in the lower part in order to fix the maximum degree of the first mirror plate's opening angle by the protruded part is caught in the screen supporter to support the first mirror when the first mirror is rotated and set up, and the stopper for said second mirror is the fixed thing protruded from the bottom part of the case at the back of the second mirror plate when the second mirror plate is set up.
12. A portable folded projection system as set forth in claim 3, wherein the projection system further comprising of: a terminal board on the outside of the case to receive signals from the outside image or audio play system; a ventilation opening to give off heat in the case to the outside, and a filter in the ventilation opening for preventing dust from coming from outside and shutting the noise arising from working the projector in the case.
13. A portable folded projection system as set forth in claim 3, wherein the projection system further comprising of: a means for playing and receiving of image signals fixed in the inside of the case to have the terminal board exposed ; a means for playing and receiving of audio signals fixed in the inside of the case to have the terminal board exposed ; a ventilation opening to give off heat in the case to the outside, and a filter in the ventilation opening for preventing dust from coming from outside and shutting the noise arising from working the projector in the case.
PCT/KR2002/000890 2002-03-25 2002-05-14 A portable folded projection system WO2003081907A1 (en)

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KR1020020016236A KR20030077247A (en) 2002-03-25 2002-03-25 A portable fold-up projection system
KR2002-0016236 2002-03-25
KR2020020009022U KR200278068Y1 (en) 2002-03-26 2002-03-26 A portable fold-up projection system
KR2002-0009022(U.M) 2002-03-26

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EP1593998A1 (en) * 2004-05-06 2005-11-09 Hewlett-Packard Development Company, L.P. Display device for projecting an image alternatively onto a remote surface and a rear projection screen
CN115002439A (en) * 2022-05-26 2022-09-02 浙江大学 Foldable three-dimensional information acquisition device
WO2024157731A1 (en) * 2023-01-29 2024-08-02 インターマン株式会社 Portable aerial video display apparatus

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JPH0341493A (en) * 1989-07-07 1991-02-21 Seiko Epson Corp Video projector
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KR19980063851A (en) * 1996-12-06 1998-10-07 이데이노부유키 Portable display
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EP1593998A1 (en) * 2004-05-06 2005-11-09 Hewlett-Packard Development Company, L.P. Display device for projecting an image alternatively onto a remote surface and a rear projection screen
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CN115002439B (en) * 2022-05-26 2023-06-02 浙江大学 Foldable three-dimensional information acquisition device
WO2024157731A1 (en) * 2023-01-29 2024-08-02 インターマン株式会社 Portable aerial video display apparatus

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