JP3332864B2 - Projection device operated by remote control - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection apparatus for irradiating an image on a screen with intense light, and more particularly to a projector remotely controlled by a remote controller.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view of such a projection device as viewed from behind, which is externally operated by a remote controller (9).
In the following description, the direction of projection onto the screen is referred to as front, and the opposite side is referred to as rear. From the front end of the cabinet (1), a projection lens (67) for projecting an image on a screen (not shown in FIG. 4) is provided so as to be freely protruded and retracted.
(11) (11), a terminal group (80) to which a cord is externally connected, and a light receiving unit (5) for receiving a remote control operation signal are provided.
The light receiving section (5) is configured by fitting a transparent transmitting piece (50) into an opening (10) formed at the lower end of the cabinet (1) and providing a light receiving sensor (SE) inside the transmitting piece (50). Is done. Remote control (9)
The user looking at the screen image, the cabinet
Since it is common to operate from the back of (1), the light receiving section
(5) is provided at the rear end of the cabinet (1). FIG. 5 is a plan view of the cabinet (1). cabinet
A chassis (3) is provided in (1), and the chassis (3) is provided.
Inside, there is a dichroic mirror (45) (4
6), total reflection mirror (75) (76) (77) (78), prism body (30),
Liquid crystal panels (7) (7a) (7b) and lenses (79) (79) (79) (79) are provided as is well known. At the back of the chassis (3), a light source
(35) has been deployed. The images projected by the liquid crystal panels (7), (7a) and (7b) are input from a terminal group (80).

The light from the light source (35) is split into R (red), G (green), and B (blue) by dichroic mirrors (45) and (46), and the B light is a total reflection mirror (77). ) After being reflected by (78), the liquid crystal panel (7a) corresponding to the B light is irradiated. The R light is applied to the liquid crystal panel (7b), and the G light is applied to the liquid crystal panel (7).
, And each light is synthesized by the prism body (30) and projected on the screen from the projection lens (67). An operation signal is issued from the remote controller (9), and the liquid crystal panels (7) (7a) (7
b) and ON / OFF of the light source (35) are switched.

[0004]

In such a projection device, as shown in FIG. 6, an image may be projected on a screen (60) by hanging it upside down from a ceiling (4). . In this case, if the projection device is not operated from below with the remote control (9), the light receiving section (5) is located on the ceiling (4) side.
It is difficult for the operation signal to reach the light receiving section (5) from directly below the device.
Therefore, the user who operates the remote control (9) is
This must be moved to a position where the operation signal from (9) reaches, which is inconvenient. SUMMARY OF THE INVENTION It is an object of the present invention to provide a projection device that may be used upside down, so that an operation signal can be received even from an operation signal emitted from directly below the device.

[0005]

The light receiving unit (5) of the projection device is
It is composed of a transparent or translucent transmitting piece (50) fitted into the opening (10) of the cabinet (1), and a light receiving sensor (SE) disposed inside the transmitting piece (50). The opening (10) is opened across the top surface and the rear end surface of the cabinet (1).
0) is the first cabinet located in the same plane as the top of the cabinet (1).
A piece (51) and a second piece (52) located in the same plane as the rear end face of the cabinet (1),
Inside the end face, beneath the light receiving section (5), the cabinet (1)
A terminal group (80) to which a cord is connected from the outside is
It is provided inside the cabinet 1 and supports the terminal group 80.
The light receiving sensor (SE) is mounted on the holder (8).
From the inside of the cabinet (1), on both sides of the transparent piece (50)
Light from inside the device enters the light-receiving sensor (SE).
Ribs (12) and (12) are provided to prevent shooting.

[0006]

[Operation and Effect] Since the transmitting piece (50) straddles the top surface and the rear end surface of the cabinet (1), the range in which a signal from the remote controller can be received becomes wider than before. Also, turn cabinet (1) upside down
When (1) is suspended, the transmission piece (50) faces rearward and downward. Therefore, the user directly under the cabinet (1)
Even if (9) is operated, the operation signal can reach the light receiving sensor (SE), which is convenient for the user. In addition, transmission piece (50)
Is located in the same plane as the top surface and the rear end surface of the cabinet (1), and does not protrude from the cabinet (1). Absent.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. The same reference numerals are used for the same configuration as the conventional one. FIG. 1 is an exploded perspective view showing the internal configuration of the rear end of the cabinet (1), and FIG. 2 is a front view of the cabinet (1) as viewed from the rear. Cabinet (1) as before
Inside, a holder (8) with a terminal group (80), a light receiving sensor
(SE), and the holder (8) is provided with a cabinet (1).
Fits through the transparent window (11) opened on the rear end face of the. The holder (8) is provided by injection molding of a synthetic resin, and two-stage shafts (81) (81) protrude from the upper end surface. The light receiving sensor (SE) is mounted on the circuit board (2), and the upper shaft (82) of the two-stage shaft (81) (81) is inserted into the holes (20) (20) formed in the circuit board (2). ) (82) fits.

At the upper corner of the cabinet (1), an opening (10) is formed across the top surface and the rear end surface, and a transparent or translucent transparent piece (50) fits into the opening (10). . The transmitting piece (50) is the first piece (51) located in the same plane as the top surface of the cabinet (1).
And a second piece (52) orthogonal to the first piece (51) and located in the same plane as the rear end face of the cabinet (1).
Ribs (12) and (12) protrude from the inner corner of the cabinet (1), and the ribs (12) and (12) are located on both sides of the transmission piece (50).
This prevents the light from the light source (35) from the inside of the apparatus from accidentally entering the light receiving sensor (SE) and causing the light receiving sensor (SE) to malfunction.

Since the transmitting piece (50) straddles the top surface and the rear end surface of the cabinet (1), the remote control (9) can be operated not only from behind the cabinet (1) but also from above. The signal passes through the transmitting piece (50) and reaches the light receiving sensor (SE).
FIG. 3A is a side view showing a range in which the operation signal of the remote control reaches. The applicant has constructed the transmitting piece (50) in this shape, so that the horizontal plane L including the light receiving sensor (SE) can be obtained. If the remote controller (9) is operated from the rear when the upward angle α is within 120 degrees and the downward angle β is within 45 degrees, the light receiving sensor
(SE) is expected to work. In the conventional device shown in FIG. 4, since the light receiving section (5) is located at the lower end of the rear end face of the cabinet (1), the upward angle α is 1
5 degrees, downward angle β within 15 degrees, remote control
The operation of (9) could not be performed. Therefore, by employing the configuration according to the present example, the operable range of the remote controller (9) is expanded.

FIG. 3 (c) shows the light receiving range in the horizontal plane. The applicant has found that the leftward angle γ from the imaginary line K parallel to the projection direction of the projection lens (67) to the left. 45 degrees,
When the right angle θ is in the range of 45 degrees, the light receiving sensor (SE) is expected to operate when the remote controller (9) is operated from behind. Therefore, as shown in FIG. 3 (b), the cabinet (1) is turned upside down, and the remote
Even if (9) is operated, the operation signal reaches the light receiving sensor (SE), which is convenient for the user who operates the remote controller. Also, since the transmitting piece (50) is located in the same plane as the top surface and the rear end face of the cabinet (1) and does not protrude from the cabinet (1), the transmitting piece (50) is obstructed during transportation of the cabinet (1). It does not become damaged or hurt. In the above example, the light receiving section (5)
Is provided only at the rear end of the cabinet (1),
It may be provided at the front end in addition to the rear end, and the number of light receiving sections (5) may be two.

The description of the above embodiments is for the purpose of illustrating the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an internal configuration of a rear end portion of a cabinet.

FIG. 2 is a front view of the cabinet as viewed from the rear.

3 (a) is a side view showing a range where an operation signal of a remote control reaches, FIG. 3 (b) is a side view in which the same is turned upside down, and FIG.
It is a top view of (a).

FIG. 4 is a perspective view of a conventional projection device.

FIG. 5 is a plan view showing the internal structure of the above.

FIG. 6 is a side view showing a state where a conventional projection device is turned upside down and suspended from a ceiling.

[Explanation of symbols]

 (1) Cabinet (5) Receiver (8) Holder (10) Opening (50) Transmission piece (51) First piece (52) Second piece (80) Terminal group

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03B 21/00 H04B 10/10 H04B 10/105 H04B 10/22

Claims (1)

(57) [Claims] 1. A projection lens (67) for irradiating an image on a screen is provided at a front end of a cabinet (1), and a light receiving unit (5) for receiving a remote control operation signal from outside the cabinet (1) is provided at a rear end. The light receiving unit (5) includes a transparent or translucent transmitting piece (50) fitted in an opening (10) of the cabinet (1), and a light receiving sensor (SE) disposed inside the transmitting piece (50). The opening (10) is opened across the top surface and the rear end surface of the cabinet (1), and the transmitting piece (50) is in the same plane as the top surface of the cabinet (1). , And a second piece (52) located in the same plane as the rear end face of the cabinet (1). The light receiving section is provided in the rear end face of the cabinet (1). (5) Below
Is the terminal to which the cord is connected from the outside of the cabinet (1)
A group (80) is provided and provided inside the cabinet (1).
On the holder (8) supporting the terminal group (80), the light receiving sensor
(SE) is attached, and from the inside of the cabinet (1), it is located on both sides of the transparent piece (50).
And light from inside the device enters the light-receiving sensor (SE).
A projection device provided with ribs (12) and (12) for preventing the projection from occurring .