JP2008256945A - Projection type display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform remote control operation from various positions regardless of using and installation circumstances of a projection type display device, and to reduce noise to a remote control light receiving part from a fluorescent lamp when the projection type display device is used while it is suspended from the ceiling. <P>SOLUTION: The projection type display device 1 having a remote control operation function is equipped with a projection lens 3 for projecting video light to a screen, an openable/closable lens cover 4 for protecting the projection lens 3, and the remote control light receiving part 5 provided on the lens cover 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projection display device having a remote control operation function.

  2. Description of the Related Art Conventionally, a projection display device, for example, a projection display device using a liquid crystal panel as a display device, splits light emitted from a light source lamp and reflected by a reflector into a predetermined color light through a plurality of dichroic mirrors. Is input to a liquid crystal panel corresponding to each of the R, G, and B color lights via a polarization beam splitter and modulated with a video signal or the like. Thereafter, each color light is condensed through a dichroic mirror or a dichroic prism and projected onto a screen from a projection lens. In this way, a light source lamp, an optical component, a display device such as a liquid crystal panel, a control board for controlling images, a power supply board, and the like are housed in a housing, and the projection lens is disposed at the front of the housing. A projection display device is configured.

  In addition, many projection display devices have a remote control function for controlling the projection display device body from the outside, and include a remote control light receiving unit composed of a photodiode or the like as a part for receiving a remote control signal.

  Further, when the projection display device is not in operation, the projection lens is covered with a lens cover to protect the projection lens or to prevent dust.

  In a conventional projection display device, the remote control light receiving unit is provided on the front surface of the projection display device main body, the remote control light receiving portion is provided on the rear surface of the projection display device main body, and both the front and rear surfaces of the projection display device main body. What is provided for is known.

  In the conventional projection display device as described above, when the remote control light receiving unit is arranged only on one of the front or rear surface of the projection display main body, the remote control operation is performed from the side where the remote control light receiving unit is not arranged. There was a problem that the transmission signal from the remote control transmitter could not be received. Also, in response to this problem, remote control signals from the front and rear sides can be received, but remote control signals from the left and right directions cannot be received for those provided on both the front and rear surfaces of the projection display device body. Further, since it is necessary to add two remote control light receiving units, the cost increases and a space for adding two remote control light receiving units is required, which hinders the miniaturization of the projection display device main body.

  In addition, when the projection display main unit is used by attaching it to the ceiling of a room, fluorescent lamps for lighting the room are often nearby, and the light from this fluorescent lamp is a remote control signal to the remote control light receiving unit. There was a problem that the reliability of remote control was lowered due to noise.

  In order to deal with these problems, in Patent Document 1, a reflector is provided on the front side of the projection display main body so that a remote control transmission signal from the rear side is guided to the remote control light receiving unit on the front side, Document 2 proposes that a movable light-shielding plate is disposed in front of the remote control light-receiving unit to reduce noise from a fluorescent lamp when suspended from a ceiling.

Utility model registration No. 3093280 JP 2000-49364 A

  The technique of Patent Document 1 can handle remote control operations from the rear side of the projection display device main body, but cannot handle operations from the side surface side. Moreover, the subject that the noise from the fluorescent lamp at the time of ceiling use cannot be reduced occurred.

  Although the technique of Patent Document 2 reduces noise from a fluorescent lamp when suspended from a ceiling, it cannot cope with a remote control operation from directly below the main body of the projection display device. Also, when a remote control operation is performed from the side where the remote control light receiving unit is not arranged, there is a problem that a transmission signal cannot be received.

  The present invention has been made to solve such a problem, and enables remote control operation from various positions regardless of the use and installation status of the projection display device. The purpose is to reduce the noise from.

  In order to solve the above problems, a projection display device of the present invention having a remote control operation function is provided on a projection lens that projects image light onto a screen, an openable and closable lens cover that protects the projection lens, and a lens cover. A remote control light receiving unit is provided.

  According to the projection type display device according to the present invention, by providing the lens cover with the remote control light receiving unit, the position and orientation of the remote control light receiving unit can be changed according to the use and installation status of the projection type display device. The remote control light receiving unit can always receive the remote control signal in a good state.

  Moreover, when using the ceiling, the remote control light receiving unit can be directed toward the floor surface, and noise from the fluorescent lamp can be reduced.

  Furthermore, by disposing the remote control light receiving unit on the lens cover, it is not necessary to arrange the remote control light receiving unit inside the projection display device body, the projection display device body can be downsized, and only one remote control light reception unit is required. Compared with the case where two remote control light receiving units are provided at the front and rear, it contributes to cost reduction.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.

<Embodiment 1>
(Constitution)
FIG. 1 is a perspective view for explaining Embodiment 1 of the projection type display apparatus of the present invention. This will be described with reference to FIG. In the projection display device 1, a projection lens 3 is disposed in the front part of the housing 2, and although not shown in the housing 2, a light source lamp, optical components such as a reflector, a mirror, and a prism, and a liquid crystal panel are provided. Such a display device is arranged to form an optical path, and an image or the like is projected onto the front screen via the projection lens 3.

  In the projection display device 1 according to the first embodiment, the lens cover 4 for protecting the projection lens 3 at the front of the housing 2 receives a remote control signal for controlling the projection display device 1 from the outside. A remote control light receiving unit 5 made of a photodiode or the like is provided.

  The lens cover 4 is provided with a rotating part 6 (first rotating part) for being connected to the housing 2 so as to open upward, and the rotating part 6 is another rotating part 7 (first rotation part). 2), the projection lens 3 can be exposed for projection by the lens cover 4 or can be covered for protection.

  Further, the lens cover 4 has engaging claws 8 and 8 a at the ends, and the housing 2 has an engaging hole 9 a corresponding to the engaging claw 8 a at the lower part of the projection lens 3 and an engaging claw 8 on the top plate 21. The engagement hole 9 corresponding to the above is provided.

  The remote control light receiving unit 5 is connected to an electric circuit (not shown) in the housing 2 by a wire such as a lead wire, and the projection display device 1 main body can be controlled by a signal received from the remote control light receiving unit 5. Become.

(Operation)
Next, the operation will be described.

  When the lens cover 4 is in a position covering the projection lens 3, that is, when the set is not used, the engaging claw 8a of the lens cover 4 is engaged and held with the engaging hole 9a on the housing 2 side. In this state, the projection lens 3 can be protected.

  Next, when the lens cover 4 is in a position where the projection lens 3 is exposed, that is, when the set is used, the lens cover 4 is opened upward at a desired opening angle by the rotating unit 6 and the remote control light receiving unit 5 is placed on the front surface. Will be exposed. Furthermore, since the lens cover 4 can be rotated in the horizontal direction by another rotating unit 7 connected to the rotating unit 6, the remote control light receiving unit 5 can be directed in all directions of 360 ° in the horizontal direction.

  Furthermore, when the projection display device 1 is used in a ceiling-mounted state, the top plate 21 is installed so as to face the floor, and the remote control user operates the remote control toward the top plate 21 of the housing 2. Will do. Accordingly, the lens cover 4 is rotated upward about the rotating portion 6 to engage and hold the engaging claw 8 of the lens cover 4 and the engaging hole 9 on the housing 2 side, thereby receiving the remote control light. The part is directed toward the remote control sender.

(effect)
Since the direction of the remote control light receiving unit can be changed in accordance with the position of the remote control sender, there is no restriction on the installation location of the projection display device 1, and the projection display device 1 that is easy to use can be provided. .

  Further, when the projection display device 1 is used in the ceiling state, the remote control light receiving unit is fixed by fixing the lens cover 4 in a position parallel to the top plate 21, that is, the remote control light receiving unit 5 in the floor surface direction. It becomes possible to arrange at a position not easily affected by the light of the fluorescent lamp, and noise from the fluorescent lamp can be reduced.

  Note that the engagement between the lens cover 4 and the housing 2 does not have to be performed by an engaging claw. For example, it is sufficient if the projection lens can be held at a position where the projection lens is exposed, for example, by setting the magnetic force or the frictional resistance of the rotating portion high. .

  Further, when the lens cover 4 is in a position covering the projection lens 3, that is, when the set is not used, a space that is not originally used can be utilized as a storage place for the remote control light receiving unit 5. Therefore, there is no need to divide the space inside the housing 2 for the remote control light receiving unit 5, and the housing 2 can be reduced in size. In addition, since only one remote control light receiving unit 5 is required, it contributes to cost reduction as compared with the case where two remote control light receiving units 5 are provided at the front and rear.

<Embodiment 2>
(Constitution)
2 and 3 are perspective views for explaining Embodiment 2 of the projection type display device of the present invention.

  As in the first embodiment, the projection display device 1 has the projection lens 3 disposed in the front part of the housing 2, and the lens cover 4 for protecting the projection lens 3 controls the projection display device 1 from the outside. The remote control light-receiving part 5 which consists of a photodiode etc. which receives the remote control signal for this is provided.

  However, the lens cover 4 of the projection display device 1 according to the present embodiment does not have a rotating part and an engaging claw as shown in the first embodiment, and is removable from the projection display device 1. It has a configuration. Furthermore, a connector 10 that can be structurally and electrically connected to the projection display device 1 is provided.

  The main body side of the projection display device 1 does not have an engagement hole as shown in the first embodiment, and is for structurally and electrically connecting to the connector 10 of the lens cover 4 with the remote control light receiving unit 5. At least one or more connectors 11, 11a are provided. The connectors 11 and 11 a are connected to an electric circuit (not shown) in the housing 2, and the main body of the projection display device 1 can be controlled by a signal received from the remote control light receiving unit 5.

  Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted here.

(Operation)
Next, the operation will be described.

  When the lens cover 4 with the remote control light receiving portion is in a position covering the projection lens 3, that is, when the set is not used, the lens cover 4 and the projection lens 3 are fitted and held by the cylindrical portion. In this state, the projection lens 3 can be protected. At this time, the remote control light receiving unit 5 is preferably provided at a position where it is not exposed.

  Next, when the set is used, the lens cover 4 is removed from the projection lens 3, and the connector 10 of the lens cover 4 is connected to the main body side connector 11 or 11a of the projection type display device 1, so that the main body of the projection type display device 1 is connected. In addition to being fixed, the remote control light receiving unit 5 can be directed toward the remote control user.

  For example, when the projection display device 1 is used in a suspended state, as shown in FIG. 3, in order to fix the lens cover 4 in a position parallel to the top plate 21, that is, the remote control light receiving unit 5 in the floor direction. What is necessary is just to fix to the connector 11a of the projection type display apparatus 1.

(effect)
According to the second embodiment, the lens cover 4 can be securely fixed to the position of the arbitrary connector 11 or 11a of the projection display device 1, and the remote control light receiving unit can be adjusted in accordance with the position of the remote control sender. Since the position can be changed, there is no restriction on the installation location of the projection display device 1, and it is possible to provide an easy-to-use projection display device 1. In particular, when the projection display device 1 is permanently installed at a predetermined position such as a ceiling, the user can freely select the installation position of the lens cover 4 and can be permanently fixed.

  Further, when the projection display device 1 is used in a ceiling state, the remote control light receiving unit can be disposed at a position that is not easily affected by the light of the fluorescent lamp by fixing the lens cover 4 to the connector 11a. It becomes possible, and the noise from a fluorescent lamp can be reduced.

  In addition, it is preferable that the connectors installed on the main body side of the projection display device 1 are installed not only on the front and top surfaces but also on the rear surface, the left and right surfaces, or on all surfaces.

1 is a perspective view of a projection display device according to Embodiment 1 of the present invention. It is a perspective view of the projection type display apparatus which concerns on Embodiment 2 of this invention. It is a perspective view of the projection type display apparatus which concerns on Embodiment 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Projection type display apparatus, 2 housing | casing, 3 projection lens, 4 lens cover with a remote control light-receiving part, 5 remote control light-receiving part, 6, 7 rotation part, 8, 8a engagement claw, 9, 9a engagement hole 10, 11, 11a connector.

Claims (4)

A projection type display device having a remote control operation function,
A projection lens that projects image light onto a screen;
An openable and closable lens cover for protecting the projection lens;
A projection display device comprising: a remote control light receiving portion provided on the lens cover.   The projection display device according to claim 1, wherein the remote control light receiving unit is provided at a position exposed when the lens cover is in an open state.   The lens cover includes a first rotating unit for connecting to the projection display device so as to open upward, and a second rotating unit for further rotating in the horizontal direction in the opened state. The projection type display device according to claim 2 provided. The lens cover is configured to be detachable from the projection display device,
The projection display device according to claim 1, further comprising at least one connector capable of installing the lens cover in a detached state as the remote control light receiving unit.

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