JP2010063039A - Remote control receiving apparatus and projection-type display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote control receiving apparatus capable of receiving transmission signals from a wide range. <P>SOLUTION: A remote control receiving section 90 includes: a remote control receiving circuit 93 for receiving signal light (transmission signal) for performing remote control from a receiving part 931; a light guide member 91 for turning the signal light toward the receiving part 931 through a diffraction; and a reflecting member 92 for reflecting the signal light, that is emitted from the light transmitting member 91 but is not directed to the receiving part 931, toward the reflecting part 931. The reflection member 92 includes a reflecting plane 92a formed in an annular shape. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a remote control receiver that receives a transmission signal for remote control. The present invention also relates to a projection display device provided with a remote control receiver.

Currently, a projection display device (hereinafter referred to as “projector”) that enlarges and projects an image drawn on a liquid crystal panel or the like onto a projection surface (screen or the like) has been commercialized and widely spread. This type of projector is usually provided with a remote control receiver, and can be remotely operated by a transmission signal (for example, signal light by infrared rays) from a remote control transmitter. An example of a projector that can be remotely controlled is described in, for example, Patent Document 1, and an example of a remote control receiver that can be mounted on an electrical device such as a projector is described in, for example, Patent Document 2.
JP 2005-148595 A JP 2006-179767 A

  When the projector is installed on a floor or a desk, it is assumed that a remote operation is received from the front, rear, left and right of the apparatus. On the other hand, an effective reception angle is defined for the remote control receiver, and a transmission signal cannot be properly received unless the direction is within the effective reception angle. However, this effective reception angle is not sufficiently wide. For this reason, in the projector, in order to receive transmission signals from a wide range, it is necessary to arrange a plurality of remote control receivers, which may increase costs and make the structure complicated.

  The present invention has been made to solve such a problem, and a remote control receiving device capable of receiving a transmission signal from a wide range and a remote control receiving device capable of smooth remote control are provided. An object is to provide a projection display device.

  A remote control receiving apparatus according to the first aspect of the present invention includes a remote control receiving unit that receives a transmission signal for performing remote control from a receiving unit, a guiding unit that directs the transmission signal to the receiving unit by refraction, Reflecting means for reflecting the transmission signal that is not directed to the receiving unit from the guiding unit and that is directed to the receiving unit.

  When the approach angle of the transmission signal with respect to the direction perpendicular to the receiving unit of the remote control receiving unit (the front direction of the receiving unit) is relatively small, the transmission signal that has entered the guiding unit is refracted and passes through the guiding unit. Proceeding in the direction toward the reception unit, the guidance unit exits and is received by the reception unit.

  On the other hand, when the approach angle is increased, the transmission signal that has entered the guiding unit is not refracted until it travels to the receiving unit even if it is refracted, and exits the guiding unit in a direction away from the receiving unit. However, the transmission signal output from the guiding means is reflected by the reflecting means, travels to the receiving section, and is received by the receiving section.

  In this way, according to this configuration, a transmission signal from an approach angle that cannot be guided to the remote control receiving means (receiving unit) by the guiding means can be guided to the remote control receiving means by the reflecting means. The transmission signal can be received.

  In addition, it is desirable that the reflecting means has a configuration having an annular reflecting surface. With such a configuration, the transmission signal can be reflected to the receiving unit side by the reflecting surface regardless of the direction of the transmission signal from the guiding means. In addition, the reflective surface should just be substantially cyclic | annular, and it may not be continuous over the perimeter, and a part may be interrupted.

  At this time, if the reflecting means is disposed so that the reflecting surface surrounds the periphery of the guiding means, the transmission signal emitted from the guiding means can be reliably reflected by the reflecting surface.

  Furthermore, at this time, if the reflecting means is arranged so that the reflecting surface surrounds the periphery of the light receiving unit, the transmission signal reflected by the reflecting unit can be reliably received by the receiving unit.

  A projection display device according to a second aspect of the present invention includes the remote control receiver according to the first aspect.

  According to this configuration, similarly to the first aspect, the remote control receiving device can receive a transmission signal from a wide range, so that remote control can be performed smoothly.

  As described above, according to the present invention, it is possible to provide a remote control receiver capable of receiving transmission signals from a wide range. Further, by providing such a remote control receiver, a projection display device capable of smooth remote control can be provided.

The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

  Hereinafter, a configuration of a projector to which a remote control receiver according to an embodiment is applied will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an overview of a projector.

  The external cabinet 1 of the projector includes a first cabinet 1a and a second cabinet 1b that protrudes laterally from the first cabinet 1. A window 2 for projecting light modulated by the video signal is disposed on the front side of the first cabinet 1a, and the remote control receiver 90 is externally provided near the window 2 (upper surface of the first cabinet 1a). It faces. Further, from the right side surface of the first cabinet 1a, each terminal of the AV terminal unit 50 and the AC inlet 60 face the outside, and a knob 22 for adjusting the focus of the projected image is displaced in the Z-axis direction. It is arranged as possible.

  Note that the AV terminal unit 50 includes an operation button unit 51 for alarm operation input. In addition, an LED 451 for notifying a decrease in the remaining battery level is exposed to the outside from the second cabinet 1b.

  An adapter is used when the projector is placed on a placement surface such as a floor.

  FIG. 2 is a diagram for explaining the configuration and mounting method of the adapter. The figure (a) shows the case where the stand 3 is used as an adapter, and the figure (b) shows the case where the arm member 5 is used as an adapter.

  Referring to FIG. 2A, the stand 3 is mounted on the bottom surfaces of the first cabinet 1a and the second cabinet 1b. That is, the stand 3 is screwed to the first cabinet 1 a with the screws 4 with the bottom surfaces of the first cabinet 1 a and the second cabinet 1 b placed on the top surface of the stand 3.

  FIGS. 3A and 3B are a right side view and a back side view, respectively, showing the usage state of the projector when the stand 3 is mounted. In this case, the light modulated by the video signal is projected onto the surface (mounting surface) on which the projector is mounted.

  Referring to FIG. 2B, the arm member 5 is mounted on the back surfaces of the first cabinet 1a and the second cabinet 1b. That is, the arm member 5 is screwed to the first cabinet 1a with the screws 6 in a state where the holes of the arm member 5 are aligned with the screw holes arranged on the back surfaces of the first cabinet 1a and the second cabinet 1b.

  FIG. 4 is a right side view showing a usage state of the projector when the arm member 5 is attached. In this case, the light modulated by the video signal is projected onto a surface (wall, screen, etc.) different from the surface (mounting surface) on which the projector is placed. In addition, by turning the adjusting screw 5a arranged on the arm member 5, the light projection direction can be finely adjusted, and the projection state of the image on the projection surface can be adjusted.

  5 and 6 are an external perspective view and a top view showing the configuration of the projector in a state where the external cabinet 1 is omitted. FIG. 6 shows a state where the main board 40 is removed.

  Referring to FIGS. 5 and 6, the projector includes optical engine 10, projection optical system 20, power supply unit 30, main board 40, AV terminal unit 50, and AC inlet 60. In addition, 80a is a boss from the front side cabinet, 80b is a boss from the back side cabinet, and 80c is a bush for vibration absorption.

  The projection optical system 20 is mounted in the cabinet by sandwiching the collar portion between the bosses 80a and 80b via the bush 80c. As described above, the projection optical system 20 is sandwiched via the vibration absorbing bush 80c, so that the impact from the external cabinet 1 is difficult to be transmitted to the projection optical system 20. Further, since the projection optical system 20 is supported by the boss 80a from the front cabinet and the boss 80b from the back cabinet via the vibration absorbing bush 80c, the support strength is improved.

  As shown in FIG. 6, a focus adjustment lever 21 protrudes from the projection lens portion of the projection optical system 20. The focus of the projected image is adjusted by rotating the lever 21 in the in-plane direction of the XZ plane. The focus adjusting knob 22 is attached to the tip of the focus lever 21, and this knob 22 faces the outside from the right side surface of the first cabinet 1a (see FIG. 4).

  The optical engine 10 separates white light from the light source 101 into light in the blue wavelength band, green wavelength band, and red wavelength band and modulates light in each wavelength band with a display element (liquid crystal panel). The light of each wavelength band is color-synthesized by a dichroic prism, and the synthesized light is emitted to the projection optical system 20. As shown in FIG. 7, the light source 101 is arranged to irradiate light in the X-axis direction, and the projection optical system 20 is arranged so that the optical axis is in the Y-axis direction.

  The power supply unit 30 supplies power to the light source 101 and the main board 40. An AC voltage is input to the power supply unit 30 via the AC inlet 60. The main board 40 is a circuit for driving and controlling the projector. As shown in FIG. 5, the circuit board that holds the main board 40 is disposed so as to cover a part of the optical engine 10. Further, an AV (Audio Visual) signal is input to the main board 40 via the AV terminal unit 50. Further, the AV terminal portion 50 includes the operation button portion 51 for alarm operation input as described above.

  Three intake fans 71 are arranged on the back side of the optical engine 10. The air sucked by these intake fans 71 is exhausted by the exhaust fan 72 disposed on the left side of the optical engine 10 and the exhaust fan 72 disposed on the back side. By arranging the intake fan 71 and the exhaust fan 72 in this way, the air sucked by the intake fan 71 flows through the optical system of the optical engine 10, the light source 101, and the power supply unit 30. The sucked air is guided to the side surface of the light source 101 through the duct 73 and flows from the side surface of the light source 101 toward the exhaust fan 72. The heat generated in these members is removed by the air flow.

  Next, the configuration of the remote control receiver 90 will be described with reference to FIGS. The remote control receiving unit 90 receives signal light (transmission signal) based on infrared rays transmitted from a remote control transmitter (not shown) and outputs a signal corresponding to the signal light to the main board 40. The user can perform remote control of the projector by operating the remote control transmitter.

  FIG. 7 is an exploded perspective view of the remote control receiver 90 before being attached to the back side of the first cabinet 1a. FIG. 8 is a diagram showing the configuration of the remote control receiving unit 90. FIG. 8A is an exploded perspective view of the remote control receiving unit 90 as viewed from the front side, and FIG. It is AA 'sectional drawing of the figure (a) in the state attached to the 1st cabinet 1a.

  As shown in FIG. 7, a light receiving window 111 is formed in the first cabinet 1a. A pair of ribs 112, a mounting boss 113, and a pin 114 are formed around the light receiving window 111 in order to mount the remote control receiver 90 to the first cabinet 1a. A claw is formed at the tip of the rib 112.

  Referring to FIGS. 7 and 8, remote control receiving unit 90 includes light guide member 91, reflecting member 92, remote control receiving circuit 93, and receiving board 94.

  The light guide member 91 includes a light guide portion 911 and two leg portions 912 that support the light guide portion 911. The light guide member 91 is made of a material having a high refractive index, for example, an acrylic material.

  The light guide part 911 has a substantially cylindrical shape, and a step part 911a is formed at the tip part, and the outer diameter of the tip part is made smaller by the step part 911a. Moreover, the front end surface 911b of the light guide unit 911 is formed to have a spherical shape. A substantially cylindrical guide portion 911c is formed on the rear surface of the distal end portion of the light guide portion 911 so as to protrude toward the remote control receiving circuit 93, and a recess in which the reflection member 92 is fitted around the guide portion 911c. 911d is formed (see FIG. 8B).

  The leg portions 912 are provided on both sides of the light guide portion 911. Each leg 912 is formed with a rectangular opening 912a.

  The reflecting member 92 has an annular shape (cylindrical shape), and is formed of a highly reflective material such as an aluminum material so that the signal light can be reflected by its inner surface (reflecting surface) 92a. In order to improve the reflection performance, the inner surface 92a of the reflecting member 92 can be mirror-finished.

  The remote control receiving circuit 93 is mounted on a receiving board 94, and a spherical receiving unit 931 is disposed on the upper surface thereof for receiving signal light. The remote control receiving circuit 93 has a predetermined effective reception angle (for example, ± 30 degrees) with respect to a direction perpendicular to the light receiving unit 931, and the light receiving efficiency is greatly reduced for signal light from an angle exceeding that. .

  A pair of square holes 941, screw holes 942, and round holes 943 are formed in the receiving substrate 94. In addition to the remote control receiving circuit 93, peripheral circuit components 944 are mounted on the receiving board 94.

  As shown in FIG. 8B, the receiving board 94 on which the light guide member 91, the reflecting member 92, and the remote control receiving circuit 93 are mounted is integrated as a remote control receiving unit 90 by being attached to the first cabinet 1a. The

  When the remote control receiving unit 90 is attached to the first cabinet 1 a, for example, after the reflective member 92 is fitted into the recess 911 c of the light guide member 91, the light guide unit 911 is fitted into the window 111. At this time, the rib 112 is passed through the opening 912a of the leg 912.

  Next, the receiving substrate 94 is attached to the rear of the light guide member 91. At this time, the round hole 943 is inserted into the pin 943 and the square hole 941 is pushed into the rib 112. As a result, the claw of the rib 112 engages with the edge of the square hole 941, and the receiving board 94 cannot be removed.

  Further, at this time, the screw hole 942 is aligned with the mounting boss 113. Therefore, finally, the receiving board 94 is screwed to the mounting boss 113 using a screw (not shown).

  Thus, when the remote control receiving unit 90 is attached to the first cabinet 1a, that is, when the remote control receiving unit 90 is assembled, the front end surface 911b of the light guide unit 911 is exposed to the outside from the first cabinet 1a. . Further, the centers of the light guide portion 911 and the receiving portion 931 substantially coincide with each other, and the leading end surface of the guiding portion 911c and the receiving portion 931 face each other with a slight gap. Further, the periphery of the guiding portion 911 c and the periphery of the receiving portion 931 are surrounded by the inner surface (reflecting surface) 92 a of the reflecting member 92.

  Next, the reception form of signal light in the remote control receiver 90 will be described with reference to FIG.

  Since the remote control light receiving unit 90 is arranged on the upper surface of the cabinet 1a, for example, when the projector is installed on a floor or a desk, signal light can enter the remote control light receiving unit 90 from the front, rear, left, and right directions of the projector. In this case, when the projector is installed at a low position and signal light is transmitted from a relatively high position with respect to the projector, the entrance angle of the signal light with respect to the direction P perpendicular to the receiving unit 931 shown in FIG. α is relatively small.

  When the approach angle α is smaller than a predetermined angle range (for example, ± 60 degrees), the signal light that has entered the light guide portion 911 has a sufficiently small angle with respect to the vertical direction P as shown by the broken line arrow in FIG. The light is refracted and propagates in the guiding unit 911c toward the receiving unit 931. And it goes out from the front end surface of the induction | guidance | derivation part 911c, and is received by the receiving part 931.

  On the other hand, when the projector is installed at a high position and signal light is transmitted from a position that is not very high with respect to the projector, the signal light entrance angle α with respect to the vertical direction P becomes large.

  When the approach angle α is larger than the predetermined angle range, the signal light that has entered the light guide unit 911 is refracted in the same manner as described above, as shown by the solid line arrow in FIG. It is not refracted until the angle is sufficiently small. As a result, the signal light is not propagated in the guiding portion 911c so as to go to the receiving portion 931, but exits from the outer peripheral surface of the guiding portion 911c in a direction away from the receiving portion 931. However, also in this case, the signal light emitted from the guiding portion 911c strikes the inner surface 92a of the reflecting member 92, is reflected, travels toward the receiving portion 931, and is received by the receiving portion 931.

  As described above, according to the present embodiment, signal light having a large approach angle α that cannot be directly guided to the remote control reception circuit 93 (reception unit 931) by the light guide member 91, and the remote control reception circuit 93 by the reflection member 92. Therefore, transmission signals from a wide range can be received. Therefore, remote control of the projector can be performed smoothly.

  Further, according to the present embodiment, since the periphery of the guide portion 911 c and the periphery of the receiving portion 931 are surrounded by the inner surface (reflective surface) 92 a of the reflective member 92, the light guide member 91 exits. The signal light can be reliably reflected by the reflecting member 92, and the signal light reflected by the reflecting member 92 can be reliably received by the remote control receiving circuit 93.

  Furthermore, according to the present embodiment, it is not necessary to increase the effective reception angle of the remote control receiving circuit 93, so that the remote control receiving circuit 93 can use general-purpose parts.

  The present invention is not limited to the above embodiment, and various modifications other than those described above can be made to the embodiment of the present invention.

  For example, in the above-described embodiment, the reflecting member 92 is made of only an aluminum material (a material having a high reflectivity). However, the present invention is not limited to this. For example, as shown in FIG. Alternatively, the reflecting surface 922 may be formed by forming the annular body 921 using a material having poor reflectivity such as a molded product and depositing an aluminum film or the like on the inner surface of the annular body 921. Further, as shown in FIG. 6B, the reflecting surface 922 is formed by integrally forming the annular body 921 of FIG. 6A with the light guide portion 91 and depositing an aluminum film or the like on the inner surface thereof. It is also good.

  The reflecting member 92 is preferably annular, but may not necessarily be cylindrical as in the above-described embodiment, and other members may be used as long as the receiving performance of the remote control receiving circuit 93 is not hindered. For example, a cylindrical conical shape (a shape in which the inner surface gradually widens toward the remote control receiving circuit 93 or a shape in which the inner surface gradually narrows toward the remote control receiving circuit 93) is also possible.

  Furthermore, although the embodiment in which the remote control receiver of the present invention is applied to a projector has been described, the present invention is not limited to this, and the remote control receiver of the present invention can also be applied to other electrical devices.

  In addition, the embodiment of the present invention can be modified as appropriate within the scope of the claims.

The figure (perspective view) which shows the external appearance structure of the projector which concerns on embodiment The figure explaining the installation method of the adapter and adapter which concern on embodiment The figure which shows the usage type of the projector which concerns on embodiment The figure which shows the usage type of the projector which concerns on embodiment The figure which shows the internal structure of the projector which concerns on embodiment (perspective view) The figure which shows the internal structure of the projector which concerns on embodiment (top view) The disassembled perspective view of the remote control receiver before being attached to the back side of the 1st cabinet which concerns on embodiment The figure which shows the structure of the remote control receiver which concerns on embodiment The figure for demonstrating the reception form of the signal light in the remote control receiver which concerns on embodiment The figure which shows the example of a change of the remote control receiver which concerns on embodiment

Explanation of symbols

91 Light guide member (guidance means)
92 Reflective member (reflective means)
92a inner surface (reflection surface)
93 Remote control receiving circuit (remote control receiving means)

Claims (5)

Remote control receiving means for receiving a transmission signal for performing remote control from the receiving unit;
Guiding means for directing the transmission signal to the receiving unit by refraction,
Reflecting means for reflecting the transmission signal that is not directed to the receiving unit that has exited from the guiding unit to be directed to the receiving unit;
A remote control receiver characterized by comprising: In claim 1,
The reflecting means has a reflecting surface formed in an annular shape.
A remote control receiver characterized by that. In claim 2,
The reflecting means is disposed so that the reflecting surface surrounds the guiding means.
A remote control receiver characterized by that. In claim 2 or 3,
The reflecting means is arranged so that the reflecting surface surrounds the periphery of the light receiving unit,
A remote control receiver characterized by that.   A projection display device comprising the remote control receiver according to any one of claims 1 to 4.

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