JP2009130858A - Light guide tube and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel and enhanced display device capable of efficiently dissipating the heat generated in an electronic component. <P>SOLUTION: The columnar light guide tube 592, which emits light rays made incident from a first end face at an incidence side from a second end face at an emission side, includes: a planar portion 592b provided in a lower part of the light guide 592; and a projecting portion 592c provided on the planar portion 592b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a light guide tube and a display device.

  Conventionally, as described in, for example, Patent Document 1 below, in a remote control signal receiving device, a light guide tube is disposed in front of a light receiving element, and a condensing function including a concave portion is provided on an outgoing light side end surface. It has been known.

Japanese Patent Laid-Open No. 10-243481 JP-A-6-289260

  However, an apparatus that receives a remote control signal may detect unnecessary light in addition to infrared light emitted from the remote control apparatus. For example, the remote control signal receiver may malfunction due to inverter light from a fluorescent lamp placed on the ceiling of the room. In the above prior art, since erroneous detection due to inverter light from a fluorescent lamp is not assumed, it is assumed that a remote control signal receiving device malfunctions due to inverter light.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a new and improved light guide tube and display device capable of suppressing malfunction caused by unnecessary light rays. It is to provide.

  In order to solve the above-described problem, according to an aspect of the present invention, a cylindrical light guide that emits the infrared light incident from the first end surface on the incident side from the second end surface on the emission side; There is provided a light guide tube including a flat part provided at a lower portion of the light guide part and a protrusion provided on the flat part.

  According to the above configuration, the cylindrical light guide unit that emits the infrared light incident from the first end surface on the incident side is output from the second end surface on the output side, and the planar portion is provided below the light guide unit. And a protrusion is provided on the flat surface. Therefore, when the light incident on the first end face from above is emitted from the second end face, the light is emitted from a higher position by the flat portion, and to the light receiving element disposed in the vicinity of the second end face. Is suppressed. Further, the light incident on the first end face from above is diffused by the protrusions. Therefore, when unnecessary light such as inverter light from the fluorescent light is incident, it is possible to prevent the unnecessary light from reaching the light receiving element.

  Further, the protrusion may be provided on the flat portion on the first end face side. According to such a configuration, since the protrusion is provided on the flat portion on the first end face side, unnecessary light incident from a higher angular position can be diffused by the protrusion.

  Further, a slope provided at the lower portion of the light guide portion on the second end face side may be further provided. According to such a configuration, light incident on the first end surface from the upper side is reflected upward by the inclined surface, so that unnecessary light can be prevented from reaching the light receiving element.

  In order to solve the above problem, according to another aspect of the present invention, a main body stand unit, a display unit, and a support unit that stands from the main body stand unit and supports the display unit are provided. A display device, provided inside the main body stand portion, on which an electronic component is mounted, a light receiving element mounted on the circuit board and receiving infrared light as a remote control signal, and the light receiving device A light guide tube disposed on the front surface of the device and guiding the infrared light to the light receiving device, wherein the light guide tube transmits the infrared light incident from the first end surface on the incident side to There is provided a display device including a columnar light guide that emits light from two end faces, a flat surface provided at a lower portion of the light guide, and a protrusion provided on the flat surface.

  According to the above configuration, in the display device including the main body stand unit, the display unit, and the support unit that is erected from the main body stand unit and supports the display unit, an electronic component is mounted inside the main body stand unit. A circuit board is provided. A light receiving element that receives infrared light as a remote control signal is mounted on the circuit board, and a light guide tube that guides the infrared light to the light receiving element is disposed on the front surface of the light receiving element. The light guide tube includes a cylindrical light guide that emits infrared light incident from the first end surface on the incident side from the second end surface on the output side, and a flat portion is provided below the light guide. A protrusion is provided on the flat surface. Therefore, when the light incident on the first end face from above is emitted from the second end face, the light is emitted from a higher position by the flat portion, and to the light receiving element disposed in the vicinity of the second end face. Is suppressed. Further, the light incident on the first end face from above is diffused by the protrusions. Therefore, when unnecessary light such as inverter light from the fluorescent light is incident, it is possible to prevent the unnecessary light from reaching the light receiving element.

  ADVANTAGE OF THE INVENTION According to this invention, the light guide tube and display apparatus which can suppress the malfunctioning by an unnecessary light beam can be provided.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

[Overall configuration of display device]
FIG. 1 is a schematic perspective view showing an appearance of a display device 1000 according to an embodiment of the present invention. Here, FIG. 1A is a schematic perspective view showing a state in which the display device 1000 is viewed from the upper right of the front. FIG. 1B is a perspective view showing a state in which the display device 1000 is viewed from the back and upper right of the display device 1000. FIG. FIG. 2 is a schematic perspective view showing a state in which the display device 1000 is viewed from the left side of the front.

  As shown in FIGS. 1 and 2, the display device 1000 of the present embodiment includes a main body stand unit 100, an arm unit (support unit) 200, and a display unit (display display unit) 300. The display device 1000 receives, for example, a television broadcast video and displays it on the display screen 300 a of the display unit 300.

  The display unit 300 includes a display panel (organic EL panel) 320 that displays an image using an organic electroluminescence (EL) phenomenon. The organic EL panel 320 includes a plurality of organic EL elements that are self-luminous elements and does not require a configuration such as a backlight, and thus the thickness thereof is sufficiently thin. As shown in FIG. 2, the display unit 300 of the present embodiment has a thickness t that is suppressed to about several mm (about 3 mm) or less, and is a thin panel with a very small thickness.

  The arm part 200 is provided at one position behind the main body stand part 100 and is erected upward from the main body stand part 100. The arm unit 200 is provided on the right side of the horizontal (horizontal) center of the main body stand unit 100 when the display device 1000 is viewed from the front, and on the right side of the horizontal center of the display unit 300. It is connected. As described above, in the display device 1000 according to the present embodiment, the arm unit 200 is provided on either the left or right end side of the display unit 300 in the horizontal direction, and the display unit 300 is supported in a cantilever manner.

  In the case of a liquid crystal display, since a backlight is necessary, the thickness of the display portion increases and the weight also increases. In particular, as in the present embodiment, when it is assumed that the display is not a computer display but a TV image display, in order to ensure image quality as a television receiver, more than a computer display. It is necessary to arrange a backlight. In addition to the backlight, the liquid crystal display also requires an inverter for controlling the backlight. For this reason, in the case of a liquid crystal display, in order to support the display unit in a cantilevered manner, it is necessary to greatly increase the rigidity of the display unit including the arm unit, which complicates the structure and increases the weight. Is assumed. Therefore, it is not realistic to support the liquid crystal display in a cantilever manner in consideration of user convenience, manufacturing cost, and the like.

  On the other hand, since the organic EL panel is composed of an organic EL element which is a self-luminous element, no components such as a backlight or an inverter associated therewith are required, and the organic EL panel is configured to be lightweight only with a thin glass panel. Can do. Therefore, according to the present embodiment, the display unit 300 itself can be configured to be very lightweight, and the display unit 300 can be supported in a cantilever manner.

  The display unit 300 can be rotated in the direction of the arrow A1 in FIG. 2 around the connecting portion with the arm unit 200, and the user can set the tilt position of the display unit 300 to a desired angle. .

  In the conventional display panel, the member that supports the display panel supports the central portion in the horizontal direction of the display panel from the lower side in the case of one-point support. In the case of two-point support, the vicinity of both ends in the horizontal direction of the display panel is supported from below. In the present embodiment, the arm unit 200 is disposed so as to be shifted from the horizontal center portion of the display unit 300, and the display unit 300 is supported in a cantilevered manner. Only the screen 300a can be recognized independently. Thereby, an impression can be given to the user as if the display unit 300 is floating on the main body stand unit 100 without the arm unit 200 interposed therebetween. Therefore, by supporting the display unit 300 in a cantilever manner, it is possible to allow the user to gaze at only the display screen 300a independently.

  Moreover, it is not necessary to connect the base of the arm part 200 to the center of the main body stand part 100, and the freedom degree of installation of the arm part 200 improves. Therefore, it is possible to determine the installation position of the arm unit 200 with respect to the main body stand unit 100 in consideration of the internal structure of the main body stand unit 100, the arrangement of the substrates, and the like, and the degree of design freedom can be increased. Accordingly, it is possible to arrange the constituent members most efficiently in consideration of the internal structure of the main body stand unit 100, and it is possible to minimize the size of the display device 1000. In addition, since the arm unit 200 is not installed at the center of the main body stand unit 100, an effective space can be widened on the upper surface of the main unit stand unit 100, and a display unit, operation buttons, LED indicator lamps are provided on the upper surface of the main unit stand unit 100. Etc. can be arranged freely.

  As shown in FIGS. 1 and 2, the arm unit 200 is provided to be inclined from the rear of the main body stand unit 100 toward the back surface of the display unit 300. In FIG. 2, the inclination angle θ of the arm unit 200 with respect to the vertical direction is a value of about 45 ° to 60 °. Accordingly, when the display unit 300 is viewed from the front, the arm unit 200 is hidden behind the display unit 300, and the arm unit 200 is suppressed from being recognized within the user's field of view. Therefore, it is possible to reliably suppress the arm unit 200 from being recognized in the user's field of view due to a synergistic effect with the arrangement of the arm unit 200 shifted from the center of the display unit 300.

  For this reason, only the display unit 300 and the main body stand unit 100 are shown in the user's visual field, and the arm unit 200 hardly enters the visual field, so that the user directly recognizes the connection state between the display unit 300 and the main unit stand unit 100. Is suppressed. Therefore, the user feels as if the display unit 300 is floating in the space.

  Further, as described above, in the configuration of the present embodiment, the thickness of the display unit 300 is very thin, about several millimeters, so that the user feels that the lightness of the display unit 300 is emphasized. Therefore, for the user, the display unit 300 having a very floating feeling and light weight is provided by a synergistic effect with the feeling that the display unit 300 is floating in the space.

  Thereby, the user can watch only the display content of the display unit 300 recognized as floating in the space, and concentrate on viewing the display content without being concerned about other structures. be able to. Accordingly, it is possible to provide a display device 1000 that can maintain a good design while producing a feeling that the display screen 300a is floating for the user, and greatly improve the visibility of the display screen 300a. Is possible.

[Main unit stand configuration]
FIG. 3 is an exploded perspective view showing an internal configuration of the main body stand unit 100. The main body stand unit 100 incorporates tuners for satellite broadcasting (BS, CS), terrestrial digital waves, etc., and various terminals such as LAN, HDMI, USB, etc., on the back side for receiving terrestrial digital waves. A rod antenna 104 (see FIG. 1B) is provided. The main body stand unit 100 incorporates a speaker box, operation buttons, and the like. As shown in FIG. 3, a bottom cover 550, a main substrate (O substrate) 560, a cooling unit 570, and a top cover block 580 are arranged in the main body stand unit 100 in order from the lower side.

  4 is an enlarged perspective view showing a region indicated by an arrow A in FIG. As shown in FIG. 4, on the left side of the front surface of the top cover block 580, a light receiving window 582 that receives a remote control signal transmitted from the remote control device when the display device 1000 is operated by the remote control is provided. A light guide member 590 provided with a light guide tube 592 for guiding a remote control signal to a light receiving element on the main substrate 560 is fitted in the light receiving window 582. The light guide member 590 is made of an acrylic resin such as PMMA, for example.

  FIG. 5 is a perspective view showing the positional relationship between the light receiving element 600 mounted on the main substrate 560 and the light guide member 590. FIG. 6 is a top view showing the positional relationship between the light receiving element 600 and the light guide member 590. The light receiving element 600 mounted on the main board 560 is a sensor that receives infrared light as a remote control signal.

  As shown in FIGS. 5 and 6, the light guide tube 590 has a cylindrical shape and is provided so as to extend from the main body of the light guide member 592 toward the light receiving element 600. Thus, infrared light emitted from the remote control device is guided to the light receiving surface 602 of the light receiving element 600 by the light guide tube 590. As shown in FIG. 6, the end surface 594 of the light guide tube 590 that faces the light receiving surface 602 of the light receiving element 600 has a concave shape along the light receiving surface 602.

  FIG. 7 is a schematic diagram showing a state in which infrared light emitted from the remote control device is guided to the light receiving surface 602 of the light receiving element 600, and from the front left side of the display device 1000 to the central axis of the light guide tube 590. The remote control signal is transmitted at a relatively large angle θ. Here, FIG. 7A shows a state in which light is guided by the light guide tube 592 of the present embodiment in which the end surface 594 has a concave shape. FIG. 7B shows a state in which light is guided by a light guide tube 592 having a flat end surface 594.

  As shown in FIG. 7A, in the light guide tube 592 of the present embodiment, the end face 594 has a concave shape, and therefore, as shown by an arrow in FIG. Even when the light is reflected at point P in FIG. 7A, the incident light reaches the light receiving surface 602. On the other hand, in the light guide tube 592 having the end surface 594 as a plane, incident light does not reflect at a position corresponding to point P in FIG.

  Therefore, according to the light guide tube 592 of the present embodiment in which the end surface 594 has a concave shape, the infrared light emitted from the remote control device can reliably reach the light receiving surface 602 even when the incident angle is large. The sensitivity during remote control operation can be greatly improved. Further, even when the diameter of the light guide tube 592 is reduced, infrared light having a large incident angle can be detected, so that an optimum structure can be obtained particularly when downsizing.

  FIG. 8 is a schematic diagram showing the shape of the light guide tube 592 in detail. Here, FIG. 8A is a side view showing the right side surface of the light guide tube 592. FIG. 8B is a schematic diagram showing a state in which the light guide tube 592 is viewed from the light receiving element 600 side.

  As shown in FIG. 8, a flat surface 592 b is formed in the lower portion of the cylindrical light guide tube 592. In addition, a semi-cylindrical protrusion 592c is formed on the flat surface 592b. Further, an inclined surface 592d is formed on the light receiving element 600 side of the light guide tube 592. And in this embodiment, it is trying to suppress reliably the misdetection by the inverter light especially emitted from a fluorescent lamp etc. by such a structure.

  As shown in FIG. 8A, inverter light emitted from a fluorescent lamp enters the light guide tube 592 from above. At this time, since the protrusion 592c is provided in front of the lower portion of the light guide tube 592 (front side of the display device 1000), the inverter light is diffused by the protrusion 592c as shown in FIG. To do. Thereby, it can suppress that inverter light is guide | induced to the light guide tube 592, and reaches | attains the light-receiving surface 602, and the malfunction by inverter light can be suppressed reliably.

  In addition, since the flat surface 592b is provided below the light guide tube 592, the light reflected by the flat surface 592b does not have the flat surface 592b as shown by the solid arrow in FIG. 9 (the broken line in FIG. 9). (Indicated by the arrow of). For this reason, it can suppress reliably that the inverter light which injected from upper part will arrive at the light-receiving surface 602. FIG.

  Further, since the inclined surface 592d is provided on the light receiving element 600 side below the light guide tube 592, as shown in FIG. 10, light incident on the light guide tube 592 from the upper part is reflected upward by the inclined surface 592d, and the light receiving surface. 602 is never reached. Therefore, by providing the inclined surface 592d, it is possible to reliably suppress the inverter light incident from above reaching the light receiving surface 602.

  As described above, according to the present embodiment, in the light guide tube 592 that guides the remote control signal to the light receiving element 600, a diffusion unit that prevents light from diffusing to the lower part of the light guide tube 592 and reaching the light receiving surface 602 ( Since the flat surface 592b, the protruding portion 592c, and the inclined surface 592d) are provided, it is possible to reliably suppress the inverter light incident from the top from reaching the light receiving surface 602. Therefore, it is possible to reliably prevent the display device 1000 from malfunctioning due to inverter light emitted from a fluorescent lamp or the like.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

It is a schematic perspective view which shows the external appearance of the display apparatus which concerns on one Embodiment of this invention. It is a schematic perspective view which shows the state which looked at the display apparatus from the front left side. It is a disassembled perspective view which shows the internal structure of a main body stand part. It is a perspective view which expands and shows the area | region shown by the arrow A in FIG. It is a perspective view which shows the positional relationship of the light receiving element mounted on the main board | substrate, and a light guide member. It is a top view which shows the positional relationship of a light receiving element and a light guide member. It is a schematic diagram which shows a mode that the infrared light radiate | emitted from the remote control apparatus is guide | induced to the light-receiving surface of a light receiving element. It is a schematic diagram which shows the shape of a light guide tube in detail. It is a schematic diagram which shows a mode that a light ray reflects in the plane part of a light guide tube. It is a schematic diagram which shows a mode that a light ray reflects on the inclined surface of a light guide tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1000 Display apparatus 100 Main body stand part 200 Arm part 300 Display part 560 Circuit board 590 Light guide member 592 Light guide tube 592b Plane part 592c Projection part 592d Slope

Claims (4)

A cylindrical light guide that emits light incident from the first end face on the incident side from the second end face on the emission side;
A plane portion provided at a lower portion of the light guide portion;
A protrusion provided on the planar portion;
A light guide tube, comprising:   The light guide tube according to claim 1, wherein the protrusion is provided on the flat portion on the first end face side.   The light guide tube according to claim 1, further comprising a slope provided at a lower portion of the light guide portion on the second end face side. A display device comprising: a main body stand part; a display part; and a support part that is erected from the main body stand part and supports the display part,
A circuit board provided inside the main body stand portion and mounted with electronic components;
A light receiving element mounted on the circuit board for receiving infrared light as a remote control signal;
A light guide tube disposed on the front surface of the light receiving element and guiding the infrared light to the light receiving element,
The light guide tube is
A cylindrical light guide that emits the infrared light incident from the first end face on the incident side from the second end face on the outgoing side;
A plane portion provided at a lower portion of the light guide portion;
A protrusion provided on the planar portion;
A display device comprising:

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