JP2010039130A - Projection type video display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a situation that a screen held movably and a screen frame are damaged because of their contact with each other due to a shock during transportation. <P>SOLUTION: The projection type video display apparatus includes the screen 10, and the screen frame 20 holding the screen 10 movably, and spatially modulates light emitted from a light source in accordance with an image and projects it on the screen 10. The apparatus includes a screen fixing component 30 which takes a first state to fix the screen 10 to the screen frame 20 and a second state to make the screen 10 movable relative to the screen frame 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projection type video apparatus having a screen movably held on a screen frame.

  In a projection type video apparatus, when a highly directional laser is used as a light source, it is relatively easy to increase the brightness of the projection type image display apparatus to such an extent that a clear image can be displayed even in a bright room. . However, when the laser is used as the light source, the screen glare phenomenon due to the speckle pattern, so-called scintillation, becomes more prominent than when the lamp is used as the light source.

  As a conventional method for reducing the above scintillation, there is a method in which the screen is vibrated in any one of the vertical direction of the image display surface of the screen, the longitudinal direction of the screen, and the width direction of the screen (see Patent Document 1). . The screen is vibrated in the above direction by a vibration device using a bimorph, a motor or the like.

JP 55-65940 A

  In the prior art, when an impact is applied during transportation, there is a problem that the screen or the screen frame is damaged by the screen coming into contact with the screen frame that holds the screen movably.

  The present invention has been made in view of the above, and a projection-type image capable of preventing a screen frame and a screen movably held by the screen frame from being damaged by contact with an impact during transportation or the like. An object is to provide an apparatus.

  The projection type video apparatus of the present invention that achieves the above object has a screen and a screen frame that movably holds the screen, and spatially modulates the light emitted from the light source according to the image. A projection-type imaging apparatus that projects onto the screen, wherein the screen can take a first state in which the screen is fixed with respect to the screen frame and a second state in which the screen is movable with respect to the screen frame. It is characterized by comprising a fixed part.

  According to the present invention, the first state in which the screen is fixed to the screen frame by the screen fixing component and the second state in which the screen is movable with respect to the screen frame can be taken. If the screen is fixed to the screen frame by the screen fixing component, even if an impact is applied during transportation, the screen and the screen frame do not contact each other, so that damage due to contact can be prevented. Further, during normal use, the screen can be moved with respect to the screen frame by the screen fixing component, so that the movement of the structure that holds the screen movably is not hindered.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a projection type video apparatus according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment.

  FIG. 1 is a perspective view showing the front appearance of the projection type video apparatus, and FIG. 2 is a perspective view showing the back side appearance of the projection type video apparatus. 1 and 2, the horizontal direction of the screen 10 is represented by an arrow Dx, and the vertical direction is represented by an arrow Dy. 1 and 2 includes an illumination light source device including a light source such as a laser oscillator, an illumination optical system that propagates light emitted from the illumination light source device, and space for the illuminated light. A modulation element that modulates the image and provides an image signal, a projection optical system that enlarges and projects the light output from the modulation element on a screen, and a display unit such as the screen 10 on which the light from the projection optical system is projected ing.

  As shown in FIGS. 1 and 2, the projection type video apparatus 100 includes a quadrangular screen 10 that displays an image, a screen frame 20 that holds the screen 10 in four directions along the outer periphery of the screen 10, and a screen frame 20. And a housing 40 to which is attached. The casing 40 incorporates various devices such as the above-described illumination light source device, illumination optical system, modulation element, and projection optical system.

  A vibration device (not shown) is connected to the screen 10, and vibrations in the in-plane direction and / or the width direction of the screen 10 are applied by the vibration device. A holding mechanism using an elastic member such as a spring is provided between the outer periphery of the screen 10 and the screen frame 20, and the screen 10 is held movably with respect to the screen frame 20 by this holding mechanism. With such a configuration, the screen 10 is vibrated with respect to the screen frame 20 to reduce scintillation.

  Next, the screen fixing component 30 that fixes the screen 10 to the screen frame 20 at the time of transportation or the like will be described. FIG. 3 is an exploded perspective view showing the structure of the screen fixing component 30. FIG. 4 is a cross-sectional view showing a state where the screen and the screen frame are fixed by the screen fixing component, and FIG. 5 is a cross-sectional view showing a state where the fixing of the screen and the screen frame by the screen fixing component is released.

  As shown in FIGS. 3 to 5, the screen fixing component 30 is disposed in the gap between the screw hole unit 70 as the first component disposed in the screen 10 and the screen frame 20 and the screw hole unit 70. The spacer unit 60 as the second part, the slide unit 50 as the third part disposed on the outside of the screen frame 20, that is, the back side of the projection type video apparatus 100, and the connection for connecting the spacer unit 60 and the slide unit 50. The pins 55 and screws 80 for fixing the screen 10 to the screen frame 20 are configured. As shown in FIG. 2, these screen fixing components 30 are provided at four positions on the back side of the projection type video apparatus 100. In FIG. 2, four slide units 50 are shown.

  The screen frame 20 shown in FIG. 3 shows a vertical frame, and in this case, the screen frame 20 is constituted by two plate members, but may be constituted by one plate member. A screen support portion 21 having a substantially U-shaped cross section is formed at one end portion of the screen frame 20 and the end portion of the screen 10 is fitted therein. A long hole 22 and a first hole 23 extending in the vertical direction Dy are formed in the screen frame 20.

  The screw hole unit 70 is configured by a plate material attached to the screen 10, and has a protrusion 71 protruding toward the first hole 23, and a screw hole 72 provided in the protrusion 71 and having a screw groove formed therein. is doing.

  The slide unit 50 has a slide plate 52. In this case, a connecting pin 55 that passes through the long hole 22 is fixed to the slide plate 52. The connecting pin 55 may be fixed toward the spacer unit 60. The slide plate 52 has a size capable of covering the long hole 22 and the first hole 23.

  The spacer unit 60 has a recessed portion 61 into which the connecting pin 55 is inserted and fixed, and a screw hole forming portion 63 in which a second hole 62 into which the screw 80 is inserted is formed. By connecting the slide unit 50 and the spacer unit 60 by the connecting pin 55 inserted into the long hole 22, the slide unit 50 and the spacer unit 60 can move together. As shown in FIG. 4, the thickness of the screw hole forming portion 63 is substantially the same as the gap between the projection 71 of the screw hole unit 70 and the screen frame 20, and the screw hole forming portion 63 of the spacer unit 60. The thickness of the other part is shorter than the gap between the projection 71 of the screw hole unit 70 and the screen frame 20.

  When the screen 10 is fixed to the screen frame 20 using the screen fixing component 30 having such a configuration, first, as shown in FIG. 4, the slide unit 50 to which the spacer unit 60 is connected by the connecting pin 55 is moved. The first hole 23 of the screen frame 20 into which the screw 80 is inserted is exposed, and the second hole 62 of the spacer unit 60 is positioned immediately below the first hole 23. Next, the screw 80 is inserted into the first hole 23 of the screen frame 20, the second hole 62 of the spacer unit 60, and the screw hole 72 of the screw hole unit 70, and these are coupled with the screw 80. Thereby, the screen 10 is fixed to the screen frame 20. Further, at the time of fixing, the screw hole forming portion 63 of the spacer unit 60 works as a spacer in the gap between the screen frame 20 and the protrusion 71 of the screw hole unit 70, and the screw hole forming portion 63 of the spacer unit 60 is Since the screen frame 20 and the projection 71 of the screw hole unit 70 are sandwiched, the screen 10 and the screen frame 20 are more firmly fixed.

  Therefore, by connecting and fixing the screen 10 and the screen frame 20 in advance with the screw 80 before transportation, it is possible to prevent the screen 10 and the screen frame 20 from colliding with each other and being damaged by an impact during transportation. . Since the screen 10 and the screen frame 20 can be prevented from being damaged during transportation, it is not necessary to wrap and transport the projection-type imaging device 100 before transportation, and the amount of packaging during transportation and storage can be reduced. In addition, it becomes easy to improve the efficiency of the transportation method.

  Further, when the screen 10 is released using the screen fixing component 30, as shown in FIG. 5, after the screw 80 is removed, the connection is performed so as to cover the first hole 23 in addition to the long hole 22. The slide unit 50 to which the spacer unit 60 is coupled is moved by the pin 55. Thereby, the light emitted from the light source of the projection type video apparatus 100 can be prevented from leaking outside the projection type video apparatus 100 from the long hole 22 or the first hole 23, and the projection type video apparatus 100. It is possible to prevent dust from entering the projection type video apparatus 100 from the outside through the long hole 22 and the first hole 23. Further, since the slide plate 52 covers the first hole 23 in addition to the long hole 22, the appearance of the projection type video apparatus 100 during normal use can be improved.

  When the slide unit 50 and the spacer unit 60 are moved, the screw hole forming portion 63 held between the screen frame 20 and the protrusion portion 71 of the screw hole unit 70 at the time of fixing is moved, and the protrusion of the screen frame 20 and the screw hole unit 70 is moved. A gap is secured between the portion 71 and the screen 10 is not in contact with each other even if the screen 10 is vibrated. Accordingly, since the screen 10 is movably held by the screen frame 20, it is possible to add vibration to the screen 10 by the vibration device, and it is possible to reduce scintillation.

  In the above embodiment, the screen fixing component is arranged in the vertical frame of the screen frame. However, it may be arranged in the horizontal frame of the screen frame, or in both the vertical frame and the horizontal frame. It may be arranged. The screen fixing component is not limited to the structure described in the above embodiment, and includes a first state in which the screen is fixed to the screen frame and a second state in which the screen is movable with respect to the screen frame. Any other configuration may be adopted as long as it can be taken.

  The projection type video apparatus of the present invention is suitable for application to a projection type video apparatus having a screen and a screen frame that movably holds the screen.

It is a perspective view which shows the front external appearance of the projection type video apparatus of this invention. It is a perspective view which shows the back surface external appearance of the projection type video apparatus of this invention. It is a disassembled perspective view which shows the structure of a screen fixing component. It is sectional drawing which shows the state which fixed the screen and the screen frame with the screen fixing component. It is sectional drawing which shows the state which cancelled | released fixation of the screen and screen frame by a screen fixing component.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Screen 20 Screen frame 21 Screen support part 22 Long hole 23 1st hole 30 Screen fixing component 40 Case 50 Slide unit 52 Slide plate 55 Connection pin 60 Spacer unit 61 Recessed part 62 2nd hole 63 Screw hole formation part 70 Screw hole unit 71 Projection 72 Screw hole 80 Screw 100 Projection type image device

Claims (2)

A projection-type video apparatus having a screen and a screen frame that movably holds the screen, and spatially modulating light emitted from a light source according to an image and projecting the light onto the screen;
A projection type video apparatus comprising: a screen fixing component capable of taking a first state in which the screen is fixed to the screen frame and a second state in which the screen is movable with respect to the screen frame. . A gap is formed between the screen and the screen frame, and the screen frame is formed with a first hole into which a long hole and a screw are inserted,
The screen fixing component is:
A first part attached to the screen and having a screw hole forming portion in which a screw hole is formed; and the screw hole forming portion is protruded;
A second hole into which the screw is inserted, and a thickness of a portion where the second hole is formed has a size corresponding to a gap between the screw hole forming portion of the first component and the screen frame; A second component disposed in a gap between a screen and the screen frame;
A third component disposed in a portion where a long hole is formed outside the screen frame;
A connecting pin inserted into the elongated hole to connect the second part and the third part;
The screw that is inserted into the first hole of the screen frame, the second hole of the second component, and the screw hole of the first component to fix the screen to the screen frame;
When the screw is attached to fix the screen and the screen frame to the first state, the second component is connected to the screw hole forming portion of the first component and the screen frame. When the second part, the third part, and the connecting pin are connected to the screen when the screw is removed to release the fixing of the screen and the screen frame to the second state. The first part formed in the screen frame is covered with the third part by sliding with respect to the frame, and the contact between the second part and the first part is released. Item 4. The projection type video apparatus according to Item 1.

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