WO2017216958A1 - Display light guide body and display device provided with same - Google Patents

Display light guide body and display device provided with same Download PDF

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Publication number
WO2017216958A1
WO2017216958A1 PCT/JP2016/068111 JP2016068111W WO2017216958A1 WO 2017216958 A1 WO2017216958 A1 WO 2017216958A1 JP 2016068111 W JP2016068111 W JP 2016068111W WO 2017216958 A1 WO2017216958 A1 WO 2017216958A1
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WO
WIPO (PCT)
Prior art keywords
light
display
light guide
incident
light incident
Prior art date
Application number
PCT/JP2016/068111
Other languages
French (fr)
Japanese (ja)
Inventor
洋佑 網谷
Original Assignee
三菱電機株式会社
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/068111 priority Critical patent/WO2017216958A1/en
Publication of WO2017216958A1 publication Critical patent/WO2017216958A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings

Definitions

  • the present invention relates to a display light guide used for detecting the illuminance of a display, and a display device including the same.
  • the head-up display device described in Patent Literature 1 guides ambient light to an optical sensor through a light guide, and adjusts display luminance according to the brightness of ambient light received by the optical sensor.
  • the light guide has an entrance surface facing the front of the vehicle and an exit surface facing the photosensor disposed below, and ambient light incident from the front of the vehicle is used as the photosensor. It is a guide.
  • one screen may be viewed from a plurality of directions.
  • the display device mounted on the center panel of the vehicle can be viewed from both the driver seat side and the passenger seat side.
  • the light incident on the screen from the driver seat side and reflected to the passenger seat side strongly affects the visibility of the display.
  • the light incident on the screen from the passenger seat side and reflected to the driver's seat side strongly affects the visibility of the display.
  • Patent Document 1 guides light incident from one specific direction, such as the front of the vehicle, to the optical sensor.
  • the display characteristics of the screen could not be adjusted. For this reason, the visibility of screen display from a plurality of directions may be reduced.
  • This invention solves the said subject, and it aims at obtaining the light guide for a display which can improve the visibility of the screen display from a several direction, and a display apparatus provided with the same.
  • the display light guide according to the present invention includes a light incident portion and a plurality of light guide portions.
  • the light incident part has a light incident surface on which light is incident.
  • the plurality of light guides are provided to be branched from the light incident part along a plurality of directions forming a predetermined angle with respect to the normal direction of the display surface, and each has a light exit surface from which light is emitted. is doing.
  • the present invention light in a plurality of directions having a predetermined angle with respect to the normal direction of the display surface is guided by the plurality of light guides, so that light incident from these directions is detected respectively. can do. Therefore, it is possible to adjust the display characteristics according to the light incident on the display surface and reflected from a plurality of directions, and the visibility of the screen display from the plurality of directions can be improved.
  • FIG. 1 is a front view showing a display device according to Embodiment 1.
  • FIG. 3 is a cross-sectional arrow view showing a state in which the display device according to Embodiment 1 is cut along line AA in FIG. 2; 4 is a perspective view showing an example of a light guide in the first embodiment.
  • FIG. 5A is a front view showing the light guide body of FIG. 4.
  • FIG. 5B is a top view showing the light guide body of FIG. 4.
  • FIG. 5C is a side view showing the light guide body of FIG. 4. It is a figure which shows the relationship between the light guide in Embodiment 1, and ambient light.
  • FIG. 3 is a graph showing a relationship between an angle at which ambient light is incident and illuminance of ambient light guided by the light guide in the first embodiment.
  • FIG. 8A is a perspective view showing a modification of the light guide in the first embodiment.
  • FIG. 8B is a top view showing the light guide of FIG. 8A.
  • FIG. 8C is a side view showing the light guide body of FIG. 8A.
  • FIG. 9A is a front view showing another modification of the light guide in the first embodiment.
  • FIG. 9B is a top view showing the light guide body of FIG. 9A.
  • FIG. 9C is a side view showing the light guide body of FIG. 9A. It is a perspective view which shows the display apparatus which concerns on Embodiment 2 of this invention.
  • FIG. 8A is a perspective view showing a modification of the light guide in the first embodiment.
  • FIG. 8B is a top view showing the light guide of FIG. 8A.
  • FIG. 8C is a side view showing the light
  • FIG. 10 is a perspective view illustrating an example of a light guide in a second embodiment.
  • 12A is a front view showing the light guide body of FIG. 11.
  • 12B is a top view illustrating the light guide body of FIG. 11.
  • FIG. 12C is a side view showing the light guide body of FIG. 11. It is a figure which shows the relationship between the light guide in Embodiment 2, and ambient light.
  • FIG. 1 is a perspective view showing a display device 1 according to Embodiment 1 of the present invention.
  • FIG. 2 is a front view showing the display device 1.
  • 3 is a cross-sectional arrow view showing the display device 1 taken along line AA in FIG.
  • FIG. 4 is a perspective view showing an example of the light guide 5 in the first embodiment.
  • the display device 1 is a display device that is attached to a specific location and in which the display on the display surface 2 may be visually recognized from a plurality of directions.
  • the display apparatus 1 is provided with the panel part 3 which has the display surface 2, and the main-body part 4 to which the panel part 3 was attached, as shown in FIG.
  • the display device 1 may be a panel-type display device including the panel unit 3 when all the components can be stored in the panel unit 3.
  • the display device 1 is a display of a car navigation device mounted on the center panel of the vehicle, and a case where the display is visually recognized mainly from two directions of the passenger seat side and the driver seat side is given as an example. I will explain.
  • the display surface 2 is the same surface as a display surface on which information is displayed or a surface parallel to the display surface, and is realized as a surface including a display surface and a non-display area provided around the display surface, for example.
  • the non-display area is an area around the display surface and on the same or parallel surface as the display surface, and is a region where a character or the like is printed. However, when there is no non-display area, only the display surface becomes the display surface 2.
  • the panel unit 3 is a display panel that displays information on the display surface 2, and the light incident surface 5 a-1 is exposed at a part of the display surface 2 as shown in FIGS. 1 and 2.
  • the panel unit 3 includes a cover plate 2a, a liquid crystal module 2b, a light guide 5 and a liquid crystal base member 6 as shown in FIG.
  • the main body 4 contains, for example, various electronic circuits for realizing the function of the car navigation apparatus.
  • the illuminance sensor 7 and the printed circuit board 8 are related to the screen display. And a substrate base member 9.
  • the illuminance sensor 7 is a sensor that receives light emitted from the light exit surfaces 5b-2 and 5c-2 of the light guide 5 and detects the illuminance.
  • the illuminance sensor 7 is mounted on the printed circuit board 8, and two illuminance sensors 7 are provided corresponding to the light exit surfaces 5b-2 and 5c-2, respectively.
  • the printed circuit board 8 is supported by the board base member 9 inside the main body 4.
  • the cover plate 2a is a transparent plate member that constitutes the display surface 2, and is formed of, for example, glass or a transparent resin material.
  • the cover plate 2a also functions as a design member by performing non-transparent printing on a region corresponding to the non-display region.
  • the liquid crystal module 2 b is a module that displays information such as an image based on an electrical signal, and is supported inside the panel unit 3 by a liquid crystal base member 6.
  • the liquid crystal module 2b includes a liquid crystal display unit that displays information according to an electrical signal, and a backlight light source unit that irradiates the liquid crystal display unit with a backlight.
  • the light guide 5 embodies the display light guide according to the present invention. By emitting ambient light incident on the light incident surface 5a-1 from the light exit surfaces 5b-2 and 5c-2, The light is guided to the illuminance sensor 7 indicated by a broken line in FIG.
  • the light guide 5 is made of, for example, a transparent resin material, and includes a light incident portion 5a, light guide portions 5b-1, 5c-1, and attachment piece portions 5d, 5e.
  • the light incident part 5a, the light guide parts 5b-1 and 5c-1, and the attachment piece parts 5d and 5e may be integrally formed of a resin material. By comprising in this way, a number of parts can be reduced and the display apparatus 1 provided with the light guide 5 can be provided at low cost. Further, as the material of the light guide 5, glass or a hollow rubber tube may be used.
  • FIG. 5A is a front view showing the light guide 5
  • FIG. 5B is a top view showing the light guide 5
  • FIG. 5C is a side view showing the light guide 5.
  • FIG. 6 is a diagram showing the relationship between the light guide 5 and the ambient light B1 and C1, and shows a state in which the light guide 5 with the light incident part 5a attached to the display surface 2 is viewed from above. Yes.
  • the light incident part 5a is a columnar member whose one end surface is the light incident surface 5a-1, and the light guide parts 5b-1 and 5c-1 are connected to the other end part.
  • the light guide 5 is in a state where the end of the light incident portion 5 a on the light incident surface 5 a-1 side is fitted in a hole 10 provided in a part of the display surface 2. It is attached to the panel unit 3. Thereby, the light incident surface 5a-1 is arranged on the same or parallel surface as the display surface 2, and the normal direction of the light incident surface 5a-1 is equal to the normal direction a of the display surface 2.
  • the light incident surface 5a-1 is arranged on the same or parallel surface as the display surface 2, and the normal direction of the light incident surface 5a-1 is equal to the normal direction a of the display surface 2.
  • ambient light from a direction having a specific angle with respect to the normal direction a of the display surface 2 is incident on the display surface 2, ambient light from the same direction is incident on the light incident surface 5a-1. Is done.
  • the light guides 5b-1 and 5c-1 are elongated columnar members that are branched from the other end of the light incident part 5a, and have light exit surfaces 5b-2 and 5c-2 at their respective end faces. is doing.
  • the light incident on the light incident portion 5a is propagated to the light exit surfaces 5b-2 and 5c-2 by total reflection inside the light guide portions 5b-1 and 5c-1. Note that the light propagation efficiency by total reflection is improved by reducing the diameter of the light guides 5b-1 and 5c-1 or increasing the length of the light guides 5b-1 and 5c-1.
  • a cylindrical member whose inner peripheral surface is a mirror surface may be used. In this structure, light propagates along the cylindrical central axis.
  • the light guides 5b-1 and 5c-1 are bent to the display surface 2 side.
  • the light guide 5 can be arranged in a narrow space along the back surface side of the display surface 2 inside the panel unit 3. Thereby, the increase in the thickness of the panel part 3 resulting from the dimension of the light guide 5 is suppressed, and the display apparatus 1 can be downsized.
  • Increasing the bent shape R of the light guide portions 5b-1 and 5c-1 also improves the light propagation efficiency by total reflection.
  • the light guide portions 5b-1 and 5c-1 branch from the light incident portion 5a along directions having angles ⁇ 2 and ⁇ 2 with respect to the normal direction a of the display surface 2.
  • the ambient light B1 is ambient light incident on the light incident surface 5a-1 in the direction from the passenger seat side having an angle ⁇ 1 with respect to the normal direction a of the display surface 2. A part of the ambient light B1 passes through the light incident surface 5a-1, but the rest is reflected as reflected light B2 toward the driver's seat.
  • the angle ⁇ ⁇ b> 2 is an angle formed by the ambient light B ⁇ b> 1 incident on the light incident portion 5 a and refracted with respect to the normal direction a of the display surface 2.
  • the ambient light C1 is ambient light incident on the light incident surface 5a-1 in a direction from the driver's seat side having an angle ⁇ 1 with respect to the normal direction a of the display surface 2. A part of the ambient light C1 passes through the light incident surface 5a-1, but the rest is reflected as reflected light C2 toward the passenger seat.
  • the angle ⁇ 2 is an angle formed by the ambient light C1 refracted by being incident on the light incident part 5a with respect to the normal direction a of the display surface 2.
  • the light guide 5 is attached to the inside of the panel unit 3 using the attachment pieces 5d and 5e.
  • the light exit surfaces 5b-2 and 5c-2 are arranged to face the light receiving surfaces of the illuminance sensors 7 corresponding thereto.
  • the illuminance sensor 7 facing the light exit surface 5b-2 detects the illuminance of the light guided by the light guide 5b-1.
  • the illuminance sensor 7 facing the light exit surface 5c-2 detects the illuminance of the light guided by the light guide 5c-1. That is, the display device 1 can separately detect the light guided by the light guide 5b-1 and the light guided by the light guide 5c-1.
  • ambient light incident on the screen increases or decreases as the vehicle moves.
  • the display device 1 is a display device mounted on a center panel of a vehicle
  • Ambient light that is incident and reflected toward the driver's seat may be reduced.
  • the viewer of the screen display is a passenger on the passenger side
  • adjust the screen brightness to increase and if the driver on the driver side is a viewer, adjust the screen brightness to decrease. become.
  • the light guide has a shape along the normal direction of the display surface, and actively detects the ambient light incident from this normal direction. It was. For this reason, it has not been possible to appropriately adjust the display characteristics according to ambient light incident from a plurality of directions that form an angle with respect to the normal direction of the display surface.
  • a conventional display device mounted on a vehicle center panel ambient light incident from the normal direction of the display surface is positively detected.
  • the brightness of the screen is adjusted according to the ambient light incident in the normal direction of the display surface from the rear of the vehicle. Since the brightness of the screen is not adjusted according to the ambient light incident on the screen from the passenger side or the driver's side in this way, there is a possibility that the brightness adjustment that reduces the visibility from the passenger in the passenger seat or the driver's seat may be performed. There is.
  • the light guides 5b-1 and 5c-1 are along the respective directions forming the angles ⁇ 2 and ⁇ 2 with respect to the normal direction a of the display surface 2. And branched from the light incident portion 5a.
  • the angles ⁇ 2 and ⁇ 2 are angles formed by the ambient light B1 and C1 refracted by entering the light incident portion 5a with respect to the normal direction a of the display surface 2.
  • the ambient lights B1 and C1 are ambient lights that are incident on the light incident surface 5a-1 from directions that form angles ⁇ 1 and ⁇ 1 with respect to the normal direction a of the display surface 2. Therefore, by using this light guide 5, it is possible to positively detect the ambient light B 1 and C 1 incident from each direction forming angles ⁇ 1 and ⁇ 1 with respect to the normal direction a of the display surface 2. Become.
  • FIG. 7 is a graph showing the relationship between the angle ⁇ 1 at which the ambient light B1 is incident and the illuminance of the ambient light B1 guided by the light guide 5.
  • ⁇ 1 is defined as an angle in the minus direction
  • the illuminance of the ambient light B1 incident from the direction having the angle ⁇ 1 is the maximum value. That is, it can be seen that the ambient light B1 incident from the direction that forms the angle ⁇ 1 with respect to the normal direction a of the display surface 2 by the light guide 5 is efficiently guided and detected by the illuminance sensor 7.
  • a part of the ambient light B1 shown in FIG. 6 is reflected by the display surface 2 and enters the eyes of the passenger in the driver's seat, and the rest is incident on the light incident surface 5a-1.
  • the ambient light B1 incident on the light incident surface 5a-1 is guided to the light output surface 5b-2 by the light guide 5b-1 and emitted.
  • the ambient light B1 emitted from the light exit surface 5b-2 is detected by the illuminance sensor 7.
  • the illuminance sensor 7 generates an electrical signal corresponding to the intensity of the ambient light B1 detected in this way and outputs it to the control unit.
  • the control unit controls the output of the backlight light source unit of the liquid crystal module 2b, for example, according to the electrical signal input from the illuminance sensor 7. Thereby, the brightness
  • control unit is not illustrated in FIG. 3, the control unit is mounted inside the panel unit 3 or the main body unit 4.
  • the control unit may be a dedicated hardware processing circuit, but may be realized by using a CPU (Central Processing Unit) that reads and executes a program stored in the memory.
  • CPU Central Processing Unit
  • the control unit determines in advance which adjustment on the passenger side or the driver side is prioritized. For example, when giving priority to the driver's seat side, the control unit adjusts the display characteristics of the screen according to the ambient light B1. In this case, even if the ambient light C1 is strongly incident, the visual recognition from the driver's seat side is less affected, so the control unit does not perform adjustment according to the ambient light C1. By determining the side to be preferentially adjusted in this way, unnecessary adjustment is eliminated, and power consumption required for this can be reduced.
  • control unit may switch between the passenger seat side and the driver seat side according to the content displayed on the display device 1. For example, when displaying an image such as a movie, the driver does not continuously view the image, so the control unit gives priority to adjustment on the passenger seat side. In addition, since the navigation map screen is information necessary for driving, the control unit gives priority to adjustment on the driver's seat side.
  • the present invention is not limited to this.
  • the light guide 5 by arranging the light guide 5 so that the light guide portions 5b-1 and 5c-1 are in the vertical direction of the display surface 2, the ambient light reflected in the vertical direction is guided and actively detected.
  • FIG. 8A is a perspective view showing a light guide 5A according to a modification of the first embodiment.
  • FIG. 8B is a top view showing the light guide 5A.
  • FIG. 8C is a side view showing the light guide 5A.
  • the light guide 5A includes a light incident portion 5a having a light incident surface 5a-1 and light guide portions 5f-1 and 5g-1 provided by branching from the light incident portion 5a.
  • the light guides 5f-1 and 5g-1 receive light along directions that form angles ⁇ 2 and ⁇ 2 with respect to the normal direction a of the display surface 2 in the same manner as the light guides 5b-1 and 5c-1. Branched from the portion 5a, each has light exit surfaces 5f-2 and 5c-2.
  • the light guide portions 5f-1 and 5g-1 are not bent toward the display surface 2, and the light incident portion 5a and the light guide portions 5f-1 and 5g-1 are the same as shown in FIG. 8C. It is on a plane. That is, the light guide 5A has a Y shape as shown in FIGS. 8A and 8B. In this configuration, the depth from the light incident surface 5a-1 to the light exit surfaces 5f-2 and 5g-2 is long, and a correspondingly large mounting space is required. However, similarly to the light guide 5, light in a plurality of directions having specific angles with respect to the normal direction a of the display surface 2 can be efficiently guided.
  • FIG. 9A is a front view showing a light guide 5B of another modified example in the first exemplary embodiment.
  • FIG. 9B is a top view showing the light guide 5B.
  • FIG. 9C is a side view showing the light guide 5B.
  • the light guide 5B includes a light incident portion 5a having a light incident surface 5a-1, light guide portions 5b-1, 5h-1, and 5c-1 that are branched from the light incident portion 5a, and attachment pieces. Part 5d, 5e is provided.
  • the light guide portions 5b-1 and 5c-1 are provided to be branched from the light incident portion 5a along directions that form angles ⁇ 2 and ⁇ 2 with respect to the normal direction a of the display surface 2.
  • the light guide portion 5h-1 is provided extending from the light incident portion 5a along a direction that forms an angle of 0 ° with respect to the normal direction a of the display surface 2, and has a light exit surface 5h-2.
  • the light guide 5B In the light guide 5B, light from each direction forming angles ⁇ 2 and ⁇ 2 with respect to the normal direction a of the display surface 2 is guided by the light guides 5b-1 and 5c-1, and further, the light guide 5h- 1, the light incident along the normal direction a of the display surface 2 is efficiently guided.
  • the display device 1 is a display device mounted on a center panel of a vehicle
  • ambient light from the rear of the vehicle can be efficiently guided by using the light guide 5B.
  • the light guide according to the first embodiment may include four or more light guide parts. That is, the light guide unit in the first embodiment only has to branch from the light incident unit 5a along each direction that forms a predetermined angle with respect to the normal direction a of the display surface 2. There are many possible directions.
  • the light guide 5 includes the light incident portion 5a having the light incident surface 5a-1 and the light guide portions 5b-1 and 5c-1.
  • the light guide portions 5b-1 and 5c-1 are provided to be branched from the light incident portion 5a along the directions that form angles ⁇ 2 and ⁇ 2 with respect to the normal direction a of the display surface 2, and the light exit surface 5b-2. , 5c-2.
  • the display device 1 since the light guide portions 5b-1 and 5c-1 of the first embodiment are bent toward the display surface 2, the thickness of the panel portion 3 due to the dimensions of the light guide 5 is increased. As a result, the display device 1 can be downsized. Further, by increasing the bent shape R of the light guide portions 5b-1 and 5c-1, the light propagation efficiency by total reflection is improved.
  • the display device 1 according to Embodiment 1 includes the light guide 5, the panel unit 3 having the display surface 2 where the light incident surface 5 a-1 of the light incident unit 5 a is exposed, and the light output of the light guide 5. And an illuminance sensor 7 for detecting light emitted from the surfaces 5b-2 and 5c-2. By comprising in this way, it becomes possible to provide the display apparatus from which the effect similar to the above is acquired.
  • FIG. FIG. 10 is a perspective view showing a display device 1A according to Embodiment 2 of the present invention.
  • FIG. 11 is a perspective view showing an example of the light guide 5C in the second embodiment. Similar to the first embodiment, the display device 1A is attached to a specific location, and the display on the display surface 2A may be visually recognized from a plurality of directions.
  • the display device 1A includes a panel unit 3A having a display surface 2A and a main body unit 4 to which the panel unit 3A is attached.
  • the display surface 2A is a surface that is the same or parallel to the display surface on which information is displayed, and includes, for example, a display surface and a non-display area provided around the display surface. As realized.
  • the display surface 2A is configured by a cover plate 2a formed of glass or a transparent resin material.
  • the panel unit 3A is a display panel that displays information on the display surface 2A. As shown in FIG. 10, the display-side light incident surface 2c is exposed at a part of the display surface 2A.
  • the display side light incident surface 2c is a light incident surface on which ambient light is incident, and is provided in a non-display area of the cover plate 2a constituting the display surface 2A.
  • the display side light incident surface 2c is formed by applying a non-transparent coating to a portion other than the display side light incident surface 2c in the non-display area.
  • a portion other than the display side light incident surface 2c may be formed of a non-translucent material. Thereby, unnecessary light can be prevented from entering the inside of the panel unit 3A from the periphery of the display-side light incident surface 2c.
  • the light guide 5C embodies the display light guide of the present invention, and emits ambient light from the light exit surfaces 5b-2 and 5c-2 to the illuminance sensor 7 indicated by a broken line in FIG. Light guide.
  • the light guide 5C is made of, for example, a transparent resin material, and includes light guide portions 5b-1, 5c-1, attachment pieces 5d, 5e, and a connecting portion 5i.
  • the light guide portions 5b-1, 5c-1, the attachment pieces 5d, 5e, and the connecting portion 5i may be integrally formed of a resin material. By comprising in this way, a number of parts can be reduced and the display apparatus 1A provided with 5 C of light guides can be provided cheaply. Moreover, you may use glass or a hollow rubber tube as a material of 5 C of light guides.
  • FIG. 12A is a front view showing the light guide 5C
  • FIG. 12B is a top view showing the light guide 5C
  • FIG. 12C is a side view showing the light guide 5C
  • FIG. 13 is a diagram showing the relationship between the light guide 5C and the ambient light B1 and C1, and shows a state in which the light guide 5C attached to the inside of the panel portion 3A is viewed from above.
  • the light guides 5b-1 and 5c-1 are provided along each direction forming angles ⁇ 2 and ⁇ 2 with respect to the normal direction a of the display surface 2A, and the light incident surfaces 5b-1a and 5c-1a and the light exit surface 5b-2 and 5c-2, respectively.
  • the connecting part 5i is a member for connecting the light guide part 5b-1 and the light guide part 5c-1, and as shown in FIG. 13, the light guide part 5b-1 and the light guide part 5c-1 are connected to each other. It connects so that the state along each direction may be maintained.
  • the light guide 5C is attached to the inside of the panel portion 3A using the attachment pieces 5d and 5e.
  • the light incident surfaces 5b-1a and 5c-1a are arranged so as to face the display side light incident surface 2c from the back surface side of the display surface 2A.
  • the light exit surfaces 5b-2 and 5c-2 are arranged to face the light receiving surfaces of the corresponding illuminance sensors 7.
  • the normal direction of the display side light incident surface 2c is equal to the normal direction a of the display surface 2A. Further, when ambient light from a direction having a specific angle with respect to the normal direction a of the display surface 2A is incident on the display surface 2A, ambient light from the same direction is also incident on the display side light incident surface 2c. Is done.
  • the light incident on the display side light incident surface 2c is transmitted through the display surface 2A and emitted to the rear surface side, and is incident on the light incident surfaces 5b-1a and 5c-1a.
  • the light incident on the light incident surfaces 5b-1a and 5c-1a is propagated to the light exit surfaces 5b-2 and 5c-2 by total reflection inside the light guide portions 5b-1 and 5c-1. Note that the light propagation efficiency by total reflection is improved by reducing the diameters of the light guides 5b-1 and 5c-1 or increasing the lengths of the light guides 5b-1 and 5c-1.
  • a cylindrical member whose inner peripheral surface is a mirror surface may be used as the shape of the light guide portions 5b-1 and 5c-1. In this structure, light propagates along the cylindrical central axis.
  • the light guide portions 5b-1 and 5c-1 are bent to the display surface 2A side.
  • the light guide 5C can be arranged in a narrow space along the back surface side of the display surface 2A inside the panel portion 3A.
  • an increase in the thickness of the panel portion 3A due to the size of the light guide 5C is suppressed, and the display device 1A can be downsized.
  • Increasing the bent shape R of the light guide portions 5b-1 and 5c-1 also improves the light propagation efficiency by total reflection.
  • the ambient light B1 is ambient light incident on the display-side light incident surface 2c in a direction from the passenger seat side having an angle ⁇ 1 with respect to the normal direction a of the display surface 2A.
  • a part of the ambient light B1 passes through the display side light incident surface 2c, but the rest is reflected as reflected light B2 toward the driver's seat.
  • the angle ⁇ 2 is incident on the display-side light incident surface 2c and refracted, and the ambient light B1 incident on and refracted by the light incident surface 5b-1a is in the normal direction a of the display surface 2A. It is the angle to make.
  • the ambient light C1 is ambient light incident on the display-side light incident surface 2c in a direction from the driver's seat side having an angle ⁇ 1 with respect to the normal direction a of the display surface 2. A part of the ambient light C1 passes through the display-side light incident surface 2c, but the rest is reflected as reflected light C2 toward the passenger seat.
  • the angle ⁇ 2 is incident on the display side light incident surface 2c and refracted, and the ambient light C1 incident on the light incident surface 5c-1a is refracted in the normal direction a of the display surface 2A. It is the angle to make.
  • the light guides 5, 5A and 5B shown in the first embodiment since a plurality of light guide portions are branched from the common light entrance portion 5a, they are incident on the light entrance surface 5a-1. In some cases, a part of the light also branches to an adjacent light guide unit, and the efficiency of light guide decreases.
  • the light guide portions 5b-1 and 5c-1 of the light guide 5C in Embodiment 2 there is a gap between the display side light incident surface 2c and the light incident surfaces 5b-1a and 5c-1a. is there. By comprising in this way, the branching to an adjacent light guide part is lose
  • a part of the ambient light B1 is reflected by the display surface 2A and enters the eyes of the driver's occupant, and the rest is incident on the display-side light incident surface 2c.
  • the ambient light B1 incident on the display side light incident surface 2c is further incident on the light incident surface 5b-1a.
  • the ambient light B1 incident on the light incident surface 5b-1a is guided to the light output surface 5b-2 by the light guide 5b-1 and emitted.
  • the ambient light B1 emitted from the light exit surface 5b-2 is detected by the illuminance sensor 7.
  • the illuminance sensor 7 generates an electrical signal corresponding to the intensity of the ambient light B1 detected in this way and outputs it to the control unit.
  • the control unit controls the output of the backlight light source unit of the liquid crystal module 2b, for example, according to the electrical signal input from the illuminance sensor 7. Thereby, the brightness
  • the light guide portions 5b-1 and 5c-1 of the light guide 5C may be configured in a shape that does not bend toward the display surface 2A, like the light guide 5A.
  • a larger mounting space is required.
  • the light of the several direction which has a specific angle with respect to the normal line direction a of 2 A of display surfaces can be guided efficiently.
  • the light guide unit in the second embodiment may be provided along each direction that forms a predetermined angle with respect to the normal direction a of the display surface 2A. Can be considered.
  • the light guide 5C according to Embodiment 2 includes the light guide portions 5b-1 and 5c-1 and the connecting portion 5i.
  • the light guides 5b-1 and 5c-1 are provided along each direction forming angles ⁇ 2 and ⁇ 2 with respect to the normal direction a of the display surface 2A, and the light incident surfaces 5b-1a and 5c-1a and the light exit surface 5b-2 and 5c-2, respectively.
  • the connecting portion 5i connects the light guide portions 5b-1 and 5c-1. Even in this configuration, light in a plurality of directions having specific angles with respect to the normal direction a of the display surface 2A is guided, and thus light incident from these directions can be detected. . Therefore, it is possible to adjust the display characteristics according to the light incident on and reflected from the display surface 2A from a plurality of directions, and the visibility of the screen display from the plurality of directions can be improved.
  • a display device 1A according to Embodiment 2 includes a panel unit 3A, a light guide 5C, and an illuminance sensor 7.
  • the panel unit 3A has a display surface 2A from which the display side light incident surface 2c is exposed.
  • the light guide 5C is disposed with the light incident surfaces 5b-1a and 5c-1a facing the display side light incident surface 2c from the back surface side of the display surface 2A.
  • the illuminance sensor 7 detects light emitted from the light exit surfaces 5b-2 and 5c-2, respectively.
  • the light guide 5C showed the structure provided with the connection part 5i, it is not limited to this.
  • the connecting portion 5i may be omitted and the light guide portions 5b-1 and 5c-1 may be separately fixed in the apparatus. That is, in the light guide 5C provided in the display device 1A according to Embodiment 2, the connecting portion 5i is not an essential configuration, and the light guide portions 5b-1 and 5c-1 may be separately fixed. Good.
  • the light incident surfaces 5b-1a and 5c-1a of the light guides 5b-1 and 5c-1 are arranged to face the display side light incident surface 2c from the back surface side of the display surface 2A.
  • any combination of each embodiment, any component of each embodiment can be modified, or any component can be omitted in each embodiment. .
  • the display light guide according to the present invention can improve the visibility of screen display from a plurality of directions, for example, in an in-vehicle display device in which screen display is visually recognized from the direction of each seat of the vehicle. Is preferred.
  • 1,1A display device 2,2A display surface, 2a cover plate, 2b liquid crystal module, 2c display side light incident surface, 3,3A panel portion, 4, main body portion, 5,5A-5C light guide, 5a light incident portion 5a-1, 5b-1a, 5c-1a Light incident surface, 5b-1, 5c-1, 5f-1, 5g-1, 5h-1 Light guiding part, 5b-2, 5c-2, 5f-2 , 5g-2, 5h-2, light emitting surface, 5d, 5e mounting piece, 5i connecting portion, 6 liquid crystal base member, 7 illuminance sensor, 8 printed circuit board, 9 substrate base member, 10 holes.

Abstract

The present invention is provided with a light-entry part (5a) having a light-entry surface (5a-1), and light guide parts (5b-1, 5c-1). The light guide parts (5b-1, 5c-1) are provided so as to branch from the light-entry part (5a) along a direction forming a pre-set angle with respect to the direction of a line normal to a display surface (2), and have light-exit surfaces (5b-2, 5c-2), respectively.

Description

ディスプレイ用導光体およびこれを備えたディスプレイ装置Display light guide and display device including the same
　この発明は、ディスプレイの照度検出に使用されるディスプレイ用導光体およびこれを備えたディスプレイ装置に関する。 The present invention relates to a display light guide used for detecting the illuminance of a display, and a display device including the same.
　従来から、周囲光の明るさに応じて表示輝度を調整するディスプレイ装置が知られている。例えば、特許文献１に記載されるヘッドアップディスプレイ装置は、導光体を通して周囲光を光センサに導き、光センサが受けた周囲光の明るさに応じて表示輝度を調整している。なお、この導光体は、車両の前方に向いた入射面と、下方に配置された光センサに対向する出射面とを有しており、車両の前方から入射された周囲光を光センサに導くものである。 Conventionally, a display device that adjusts display brightness according to the brightness of ambient light is known. For example, the head-up display device described in Patent Literature 1 guides ambient light to an optical sensor through a light guide, and adjusts display luminance according to the brightness of ambient light received by the optical sensor. The light guide has an entrance surface facing the front of the vehicle and an exit surface facing the photosensor disposed below, and ambient light incident from the front of the vehicle is used as the photosensor. It is a guide.
国際公開第２０１３／１４６１６０号International Publication No. 2013/146160
　ディスプレイ装置の実際の使用態様として１つの画面が複数の方向から視認される場合がある。例えば、車両のセンターパネルに搭載されたディスプレイ装置は、運転席側からも助手席側からも見ることができる。ただし、画面表示を助手席側から見る場合、運転席側から画面に入射して助手席側へ反射する光が表示の視認性に強く影響を与える。反対に運転席側から見る場合には、助手席側から画面に入射して運転席側へ反射する光が表示の視認性に強く影響を与える。 As an actual usage mode of the display device, one screen may be viewed from a plurality of directions. For example, the display device mounted on the center panel of the vehicle can be viewed from both the driver seat side and the passenger seat side. However, when viewing the screen display from the passenger seat side, the light incident on the screen from the driver seat side and reflected to the passenger seat side strongly affects the visibility of the display. On the contrary, when viewed from the driver's seat side, the light incident on the screen from the passenger seat side and reflected to the driver's seat side strongly affects the visibility of the display.
　このように１つの画面を複数の方向から視認する場合、ユーザの視点位置へ向けて反射する光に応じて表示特性を調整する必要がある。
　しかしながら、特許文献１に代表される従来の導光体は、車両の前方といった、特定の１つの方向から入射された光を光センサに導くものであるため、複数の方向からの視認に対して画面の表示特性を調整することができなかった。このため、複数の方向からの画面表示の視認性が低下する場合があった。 Thus, when visually recognizing one screen from a plurality of directions, it is necessary to adjust the display characteristics according to the light reflected toward the viewpoint position of the user.
However, the conventional light guide represented by Patent Document 1 guides light incident from one specific direction, such as the front of the vehicle, to the optical sensor. The display characteristics of the screen could not be adjusted. For this reason, the visibility of screen display from a plurality of directions may be reduced.
　この発明は上記課題を解決するものであり、複数の方向からの画面表示の視認性を向上させることができるディスプレイ用導光体およびこれを備えたディスプレイ装置を得ることを目的とする。 This invention solves the said subject, and it aims at obtaining the light guide for a display which can improve the visibility of the screen display from a several direction, and a display apparatus provided with the same.
　この発明に係るディスプレイ用導光体は、入光部および複数の導光部を備える。入光部は、光が入射される入光面を有している。複数の導光部は、ディスプレイ面の法線方向に対して予め定められた角度をなす複数の方向に沿って入光部から分岐して設けられ、光が出射される出光面をそれぞれが有している。 The display light guide according to the present invention includes a light incident portion and a plurality of light guide portions. The light incident part has a light incident surface on which light is incident. The plurality of light guides are provided to be branched from the light incident part along a plurality of directions forming a predetermined angle with respect to the normal direction of the display surface, and each has a light exit surface from which light is emitted. is doing.
　この発明によれば、複数の導光部によってディスプレイ面の法線方向に対して予め定められた角度をなす複数の方向の光が導光されるので、これらの方向から入射する光をそれぞれ検出することができる。従って、複数の方向からディスプレイ面に入射して反射する光に応じた表示特性の調整が可能となり、複数の方向からの画面表示の視認性を向上させることができる。 According to the present invention, light in a plurality of directions having a predetermined angle with respect to the normal direction of the display surface is guided by the plurality of light guides, so that light incident from these directions is detected respectively. can do. Therefore, it is possible to adjust the display characteristics according to the light incident on the display surface and reflected from a plurality of directions, and the visibility of the screen display from the plurality of directions can be improved.
この発明の実施の形態１に係るディスプレイ装置を示す斜視図である。It is a perspective view which shows the display apparatus which concerns on Embodiment 1 of this invention. 実施の形態１に係るディスプレイ装置を示す正面図である。1 is a front view showing a display device according to Embodiment 1. FIG. 実施の形態１に係るディスプレイ装置を、図２のＡ－Ａ線で切った様子を示す断面矢示図である。FIG. 3 is a cross-sectional arrow view showing a state in which the display device according to Embodiment 1 is cut along line AA in FIG. 2; 実施の形態１における導光体の一例を示す斜視図である。4 is a perspective view showing an example of a light guide in the first embodiment. FIG. 図５Ａは、図４の導光体を示す正面図である。図５Ｂは、図４の導光体を示す上面図である。図５Ｃは、図４の導光体を示す側面図である。FIG. 5A is a front view showing the light guide body of FIG. 4. FIG. 5B is a top view showing the light guide body of FIG. 4. FIG. 5C is a side view showing the light guide body of FIG. 4. 実施の形態１における導光体と周囲光との関係を示す図である。It is a figure which shows the relationship between the light guide in Embodiment 1, and ambient light. 周囲光が入射された角度と実施の形態１における導光体により導光された周囲光の照度との関係を示すグラフである。3 is a graph showing a relationship between an angle at which ambient light is incident and illuminance of ambient light guided by the light guide in the first embodiment. 図８Ａは、実施の形態１における導光体の変形例を示す斜視図である。図８Ｂは、図８Ａの導光体を示す上面図である。図８Ｃは、図８Ａの導光体を示す側面図である。FIG. 8A is a perspective view showing a modification of the light guide in the first embodiment. FIG. 8B is a top view showing the light guide of FIG. 8A. FIG. 8C is a side view showing the light guide body of FIG. 8A. 図９Ａは、実施の形態１における導光体の別の変形例を示す正面図である。図９Ｂは、図９Ａの導光体を示す上面図である。図９Ｃは、図９Ａの導光体を示す側面図である。FIG. 9A is a front view showing another modification of the light guide in the first embodiment. FIG. 9B is a top view showing the light guide body of FIG. 9A. FIG. 9C is a side view showing the light guide body of FIG. 9A. この発明の実施の形態２に係るディスプレイ装置を示す斜視図である。It is a perspective view which shows the display apparatus which concerns on Embodiment 2 of this invention. 実施の形態２における導光体の一例を示す斜視図である。FIG. 10 is a perspective view illustrating an example of a light guide in a second embodiment. 図１２Ａは、図１１の導光体を示す正面図である。図１２Ｂは、図１１の導光体を示す上面図である。図１２Ｃは、図１１の導光体を示す側面図である。12A is a front view showing the light guide body of FIG. 11. 12B is a top view illustrating the light guide body of FIG. 11. FIG. 12C is a side view showing the light guide body of FIG. 11. 実施の形態２における導光体と周囲光との関係を示す図である。It is a figure which shows the relationship between the light guide in Embodiment 2, and ambient light.
　以下、この発明をより詳細に説明するため、この発明を実施するための形態について、添付の図面に従って説明する。
実施の形態１．
　図１は、この発明の実施の形態１に係るディスプレイ装置１を示す斜視図である。図２は、ディスプレイ装置１を示す正面図である。図３は、ディスプレイ装置１を、図２のＡ－Ａ線で切った様子を示す断面矢示図である。図４は、実施の形態１における導光体５の一例を示す斜視図である。ディスプレイ装置１は、特定の箇所に取り付けられて、複数の方向からディスプレイ面２の表示が視認される場合があるディスプレイ装置である。 Hereinafter, in order to describe the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a perspective view showing a display device 1 according to Embodiment 1 of the present invention. FIG. 2 is a front view showing the display device 1. 3 is a cross-sectional arrow view showing the display device 1 taken along line AA in FIG. FIG. 4 is a perspective view showing an example of the light guide 5 in the first embodiment. The display device 1 is a display device that is attached to a specific location and in which the display on the display surface 2 may be visually recognized from a plurality of directions.
　また、ディスプレイ装置１は、図１に示すように、ディスプレイ面２を有したパネル部３とパネル部３が取り付けられた本体部４とを備える。ただし、ディスプレイ装置１は、全ての構成要素をパネル部３に収めることができる場合、パネル部３からなるパネル型のディスプレイ装置であってもよい。
　なお、以降では、ディスプレイ装置１が、車両のセンターパネルに搭載されたカーナビゲーション装置のディスプレイであり、主に助手席側と運転席側の２つの方向から表示が視認される場合を例に挙げて説明する。 Moreover, the display apparatus 1 is provided with the panel part 3 which has the display surface 2, and the main-body part 4 to which the panel part 3 was attached, as shown in FIG. However, the display device 1 may be a panel-type display device including the panel unit 3 when all the components can be stored in the panel unit 3.
In the following description, the display device 1 is a display of a car navigation device mounted on the center panel of the vehicle, and a case where the display is visually recognized mainly from two directions of the passenger seat side and the driver seat side is given as an example. I will explain.
　ディスプレイ面２は、情報が表示される表示面と同一面またはこれと平行な面であり、例えば、表示面と表示面の周囲に設けられた非表示領域とを含む面として実現される。
　なお、非表示領域とは、表示面の周囲にあって表示面と同一または平行な面上の領域であり、文字などが印刷される余白となる領域である。ただし、非表示領域がない場合は、表示面のみがディスプレイ面２となる。 The display surface 2 is the same surface as a display surface on which information is displayed or a surface parallel to the display surface, and is realized as a surface including a display surface and a non-display area provided around the display surface, for example.
Note that the non-display area is an area around the display surface and on the same or parallel surface as the display surface, and is a region where a character or the like is printed. However, when there is no non-display area, only the display surface becomes the display surface 2.
　パネル部３は、ディスプレイ面２に情報を表示する表示パネルであり、図１および図２に示すように、入光面５ａ－１がディスプレイ面２の一部に露出されている。
　また、パネル部３は、図３に示すようにカバー板２ａ、液晶モジュール２ｂ、導光体５および液晶ベース部材６を備える。 The panel unit 3 is a display panel that displays information on the display surface 2, and the light incident surface 5 a-1 is exposed at a part of the display surface 2 as shown in FIGS. 1 and 2.
The panel unit 3 includes a cover plate 2a, a liquid crystal module 2b, a light guide 5 and a liquid crystal base member 6 as shown in FIG.
　本体部４は、例えば、カーナビゲーション装置の機能を実現するための様々な電子回路が収容されており、画面表示に関係する構成として、図３に示すように、照度センサ７、プリント回路基板８および基板ベース部材９を備えている。
　照度センサ７は、導光体５の出光面５ｂ－２，５ｃ－２から出射された光を受光して、その照度を検出するセンサである。なお、照度センサ７は、プリント回路基板８上に実装されており、出光面５ｂ－２，５ｃ－２のそれぞれに対応して２つ設けられる。
　プリント回路基板８は、本体部４の内部で基板ベース部材９によって支持されている。 The main body 4 contains, for example, various electronic circuits for realizing the function of the car navigation apparatus. As shown in FIG. 3, the illuminance sensor 7 and the printed circuit board 8 are related to the screen display. And a substrate base member 9.
The illuminance sensor 7 is a sensor that receives light emitted from the light exit surfaces 5b-2 and 5c-2 of the light guide 5 and detects the illuminance. The illuminance sensor 7 is mounted on the printed circuit board 8, and two illuminance sensors 7 are provided corresponding to the light exit surfaces 5b-2 and 5c-2, respectively.
The printed circuit board 8 is supported by the board base member 9 inside the main body 4.
　カバー板２ａは、ディスプレイ面２を構成する透明な板状部材であり、例えば、ガラスまたは透明な樹脂材料で形成されている。なお、カバー板２ａは、上記非表示領域に対応する領域に非透光性の印刷を施すことによって意匠部材としても機能する。
　液晶モジュール２ｂは、電気信号を基に画像などの情報を表示するモジュールであり、液晶ベース部材６によってパネル部３の内部に支持されている。
　なお、液晶モジュール２ｂには、電気信号に応じて情報を表示する液晶表示部と、液晶表示部にバックライトを照射するバックライト光源部とが内蔵されている。 The cover plate 2a is a transparent plate member that constitutes the display surface 2, and is formed of, for example, glass or a transparent resin material. The cover plate 2a also functions as a design member by performing non-transparent printing on a region corresponding to the non-display region.
The liquid crystal module 2 b is a module that displays information such as an image based on an electrical signal, and is supported inside the panel unit 3 by a liquid crystal base member 6.
The liquid crystal module 2b includes a liquid crystal display unit that displays information according to an electrical signal, and a backlight light source unit that irradiates the liquid crystal display unit with a backlight.
　導光体５は、この発明におけるディスプレイ用導光体を具体化したものであり、入光面５ａ－１に入射された周囲光を出光面５ｂ－２，５ｃ－２から出射することにより、図４に破線で示す照度センサ７へ導光する。また、導光体５は、例えば、透明な樹脂材料で構成されており、入光部５ａ、導光部５ｂ－１，５ｃ－１および取り付け片部５ｄ，５ｅを備える。 The light guide 5 embodies the display light guide according to the present invention. By emitting ambient light incident on the light incident surface 5a-1 from the light exit surfaces 5b-2 and 5c-2, The light is guided to the illuminance sensor 7 indicated by a broken line in FIG. The light guide 5 is made of, for example, a transparent resin material, and includes a light incident portion 5a, light guide portions 5b-1, 5c-1, and attachment piece portions 5d, 5e.
　なお、入光部５ａと、導光部５ｂ－１，５ｃ－１と、取り付け片部５ｄ，５ｅとを樹脂材料で一体に成形してもよい。このように構成することにより、部品点数を削減することができ、導光体５を備えたディスプレイ装置１を安価に提供することができる。
　また、導光体５の材料として、ガラスまたは中空のゴムチューブを使用してもよい。 The light incident part 5a, the light guide parts 5b-1 and 5c-1, and the attachment piece parts 5d and 5e may be integrally formed of a resin material. By comprising in this way, a number of parts can be reduced and the display apparatus 1 provided with the light guide 5 can be provided at low cost.
Further, as the material of the light guide 5, glass or a hollow rubber tube may be used.
　図５Ａは導光体５を示す正面図、図５Ｂは導光体５を示す上面図、図５Ｃは導光体５を示す側面図である。図６は、導光体５と周囲光Ｂ１，Ｃ１との関係を示す図であり、入光部５ａがディスプレイ面２に取り付けられた状態の導光体５を上方から見た様子を示している。入光部５ａは、一方の端面が入光面５ａ－１となっている柱状部材であり、他方の端部に導光部５ｂ－１，５ｃ－１が接続されている。 5A is a front view showing the light guide 5, FIG. 5B is a top view showing the light guide 5, and FIG. 5C is a side view showing the light guide 5. FIG. 6 is a diagram showing the relationship between the light guide 5 and the ambient light B1 and C1, and shows a state in which the light guide 5 with the light incident part 5a attached to the display surface 2 is viewed from above. Yes. The light incident part 5a is a columnar member whose one end surface is the light incident surface 5a-1, and the light guide parts 5b-1 and 5c-1 are connected to the other end part.
　導光体５は、図６に示すように、入光部５ａの入光面５ａ－１側の端部がディスプレイ面２の一部に設けられた孔部１０に嵌合された状態で、パネル部３に取り付けられる。
　これにより、入光面５ａ－１は、ディスプレイ面２と同一または平行な面に配置され、入光面５ａ－１の法線方向は、ディスプレイ面２の法線方向ａと等しくなる。
　また、ディスプレイ面２の法線方向ａに対して特定の角度を有する方向からの周囲光がディスプレイ面２に入射された場合、入光面５ａ－１においても、同じ方向からの周囲光が入射される。 As shown in FIG. 6, the light guide 5 is in a state where the end of the light incident portion 5 a on the light incident surface 5 a-1 side is fitted in a hole 10 provided in a part of the display surface 2. It is attached to the panel unit 3.
Thereby, the light incident surface 5a-1 is arranged on the same or parallel surface as the display surface 2, and the normal direction of the light incident surface 5a-1 is equal to the normal direction a of the display surface 2.
When ambient light from a direction having a specific angle with respect to the normal direction a of the display surface 2 is incident on the display surface 2, ambient light from the same direction is incident on the light incident surface 5a-1. Is done.
　導光部５ｂ－１，５ｃ－１は、入光部５ａの他方の端部から分岐して設けられた細長い円柱状の部材であり、各端面に出光面５ｂ－２，５ｃ－２を有している。
　入光部５ａに入射された光は、導光部５ｂ－１，５ｃ－１の内部における全反射により出光面５ｂ－２，５ｃ－２へ伝搬される。なお、導光部５ｂ－１，５ｃ－１の径を小さくするか、導光部５ｂ－１，５ｃ－１の長さを長くすることにより、この全反射による光の伝搬の効率が向上する。
　また、導光部５ｂ－１，５ｃ－１の形状としては、例えば、内周面を鏡面状にした円筒形状の部材であってもよい。この構造では、円筒形状の中心軸に沿って光が伝搬する。 The light guides 5b-1 and 5c-1 are elongated columnar members that are branched from the other end of the light incident part 5a, and have light exit surfaces 5b-2 and 5c-2 at their respective end faces. is doing.
The light incident on the light incident portion 5a is propagated to the light exit surfaces 5b-2 and 5c-2 by total reflection inside the light guide portions 5b-1 and 5c-1. Note that the light propagation efficiency by total reflection is improved by reducing the diameter of the light guides 5b-1 and 5c-1 or increasing the length of the light guides 5b-1 and 5c-1. .
Further, as the shape of the light guide portions 5b-1 and 5c-1, for example, a cylindrical member whose inner peripheral surface is a mirror surface may be used. In this structure, light propagates along the cylindrical central axis.
　図３に示すように、導光部５ｂ－１，５ｃ－１は、ディスプレイ面２側に曲がった形状になっている。このように構成することで、パネル部３の内部におけるディスプレイ面２の裏面側に沿った狭い空間に導光体５を配置することができる。これにより、導光体５の寸法に起因したパネル部３の厚さの増大が抑えられ、ひいてはディスプレイ装置１の小型化が可能となる。なお、導光部５ｂ－１，５ｃ－１の曲げ形状のＲを大きくすることでも全反射による光の伝搬の効率が向上する。 As shown in FIG. 3, the light guides 5b-1 and 5c-1 are bent to the display surface 2 side. With this configuration, the light guide 5 can be arranged in a narrow space along the back surface side of the display surface 2 inside the panel unit 3. Thereby, the increase in the thickness of the panel part 3 resulting from the dimension of the light guide 5 is suppressed, and the display apparatus 1 can be downsized. Increasing the bent shape R of the light guide portions 5b-1 and 5c-1 also improves the light propagation efficiency by total reflection.
　また、導光部５ｂ－１，５ｃ－１は、図６に示すようにディスプレイ面２の法線方向ａに対して角度α２，β２を有した各方向に沿って入光部５ａから分岐している。
　周囲光Ｂ１は、ディスプレイ面２の法線方向ａに対して角度α１を有した助手席側からの方向で入光面５ａ－１に入射した周囲光である。この周囲光Ｂ１の一部は入光面５ａ－１を透過するが、残りは反射光Ｂ２として運転席側へ反射される。
　角度α２は、入光部５ａに入射されて屈折した周囲光Ｂ１が、ディスプレイ面２の法線方向ａに対してなす角度である。 Further, as shown in FIG. 6, the light guide portions 5b-1 and 5c-1 branch from the light incident portion 5a along directions having angles α2 and β2 with respect to the normal direction a of the display surface 2. ing.
The ambient light B1 is ambient light incident on the light incident surface 5a-1 in the direction from the passenger seat side having an angle α1 with respect to the normal direction a of the display surface 2. A part of the ambient light B1 passes through the light incident surface 5a-1, but the rest is reflected as reflected light B2 toward the driver's seat.
The angle α <b> 2 is an angle formed by the ambient light B <b> 1 incident on the light incident portion 5 a and refracted with respect to the normal direction a of the display surface 2.
　周囲光Ｃ１は、ディスプレイ面２の法線方向ａに対して角度β１を有した運転席側からの方向で入光面５ａ－１に入射した周囲光である。この周囲光Ｃ１の一部は、入光面５ａ－１を透過するが、残りは、反射光Ｃ２として助手席側へ反射される。
　角度β２は、入光部５ａに入射されて屈折した周囲光Ｃ１が、ディスプレイ面２の法線方向ａに対してなす角度である。 The ambient light C1 is ambient light incident on the light incident surface 5a-1 in a direction from the driver's seat side having an angle β1 with respect to the normal direction a of the display surface 2. A part of the ambient light C1 passes through the light incident surface 5a-1, but the rest is reflected as reflected light C2 toward the passenger seat.
The angle β2 is an angle formed by the ambient light C1 refracted by being incident on the light incident part 5a with respect to the normal direction a of the display surface 2.
　導光体５は、取り付け片部５ｄ，５ｅを用いてパネル部３の内部に取り付けられる。
　このように導光体５がパネル部３に取り付けられた状態で、出光面５ｂ－２，５ｃ－２は、それぞれに対応した照度センサ７の受光面に対向して配置される。
　出光面５ｂ－２に対向した照度センサ７では、導光部５ｂ－１によって導光された光の照度を検出する。一方、出光面５ｃ－２に対向した照度センサ７では、導光部５ｃ－１によって導光された光の照度を検出する。すなわち、ディスプレイ装置１では、導光部５ｂ－１によって導光された光と、導光部５ｃ－１によって導光された光とを別々に検出することができる。 The light guide 5 is attached to the inside of the panel unit 3 using the attachment pieces 5d and 5e.
In this state where the light guide 5 is attached to the panel unit 3, the light exit surfaces 5b-2 and 5c-2 are arranged to face the light receiving surfaces of the illuminance sensors 7 corresponding thereto.
The illuminance sensor 7 facing the light exit surface 5b-2 detects the illuminance of the light guided by the light guide 5b-1. On the other hand, the illuminance sensor 7 facing the light exit surface 5c-2 detects the illuminance of the light guided by the light guide 5c-1. That is, the display device 1 can separately detect the light guided by the light guide 5b-1 and the light guided by the light guide 5c-1.
　なお、ディスプレイ面２で反射して視認者の眼に入る周囲光が増加すると、視認者は、画面の輝度が低下し過ぎていると感じるため、結果的に画面表示の視認性が低下する。
　この場合、ディスプレイ面２で反射して視認者の眼に入る周囲光の強度に応じて画面の輝度を上げる必要がある。
　一方、ディスプレイ面２で反射して視認者の眼に入る周囲光が減少すると、視認者は、画面の輝度が上昇し過ぎていると感じる。すなわち、視認者にとって適切な輝度よりも高い状態になっている。この場合は、ディスプレイ面２で反射して視認者の眼に入る周囲光の強度に応じて画面の輝度を下げる必要がある。 Note that when the ambient light that is reflected by the display surface 2 and enters the viewer's eyes increases, the viewer feels that the brightness of the screen is too low, and as a result, the visibility of the screen display decreases.
In this case, it is necessary to increase the brightness of the screen according to the intensity of ambient light that is reflected by the display surface 2 and enters the eyes of the viewer.
On the other hand, when the ambient light that is reflected by the display surface 2 and enters the eyes of the viewer decreases, the viewer feels that the brightness of the screen has increased too much. That is, the brightness is higher than the appropriate brightness for the viewer. In this case, it is necessary to reduce the brightness of the screen according to the intensity of ambient light that is reflected by the display surface 2 and enters the eyes of the viewer.
　また、車両に搭載されたディスプレイ装置においては、車両の移動によって画面に入射される周囲光が増加、減少する。例えば、ディスプレイ装置１が、車両のセンターパネルに搭載されたディスプレイ装置である場合、運転席側から画面に入射して助手席側へ反射する周囲光が増加しても、助手席側から画面に入射して運転席側へ反射する周囲光は減少することがある。このとき、画面表示の視認者が助手席側の乗員であれば、画面の輝度を上げる方向に調整し、運転席側の乗員が視認者であれば、画面の輝度を下げる方向に調整することになる。 Also, in a display device mounted on a vehicle, ambient light incident on the screen increases or decreases as the vehicle moves. For example, when the display device 1 is a display device mounted on a center panel of a vehicle, even if ambient light that is incident on the screen from the driver's seat side and is reflected on the passenger seat side increases, Ambient light that is incident and reflected toward the driver's seat may be reduced. At this time, if the viewer of the screen display is a passenger on the passenger side, adjust the screen brightness to increase, and if the driver on the driver side is a viewer, adjust the screen brightness to decrease. become.
　しかしながら、従来の一般的なディスプレイ装置においては、導光体が、ディスプレイ面の法線方向に沿った形状を有しており、この法線方向から入射された周囲光を積極的に検出していた。このため、ディスプレイ面の法線方向に対して角度をなす複数の方向から入射された周囲光に応じた表示特性の調整を適切に行うことできなかった。 However, in the conventional general display device, the light guide has a shape along the normal direction of the display surface, and actively detects the ambient light incident from this normal direction. It was. For this reason, it has not been possible to appropriately adjust the display characteristics according to ambient light incident from a plurality of directions that form an angle with respect to the normal direction of the display surface.
　例えば、車両のセンターパネルに搭載された従来のディスプレイ装置では、ディスプレイ面の法線方向から入射された周囲光が積極的に検出される。この場合、助手席または運転席の乗員が画面を視認する場合であっても、車両の後方からディスプレイ面の法線方向に入射された周囲光に応じて画面の輝度が調整される。このように助手席側または運転席側から画面に入射する周囲光に応じた画面の輝度調整が行わないため、助手席または運転席の乗員からの視認性が低下する輝度調整が行われる可能性がある。 For example, in a conventional display device mounted on a vehicle center panel, ambient light incident from the normal direction of the display surface is positively detected. In this case, even when the passenger in the passenger seat or the driver's seat views the screen, the brightness of the screen is adjusted according to the ambient light incident in the normal direction of the display surface from the rear of the vehicle. Since the brightness of the screen is not adjusted according to the ambient light incident on the screen from the passenger side or the driver's side in this way, there is a possibility that the brightness adjustment that reduces the visibility from the passenger in the passenger seat or the driver's seat may be performed. There is.
　これに対して、実施の形態１に係る導光体５においては、導光部５ｂ－１，５ｃ－１がディスプレイ面２の法線方向ａに対して角度α２，β２をなす各方向に沿って入光部５ａから分岐して設けられている。
　なお、角度α２，β２は、入光部５ａに入射して屈折した周囲光Ｂ１，Ｃ１がディスプレイ面２の法線方向ａに対してなす角度である。周囲光Ｂ１，Ｃ１は、ディスプレイ面２の法線方向ａに対して角度α１，β１をなす各方向から入光面５ａ－１に入射した周囲光である。従って、この導光体５を用いることで、ディスプレイ面２の法線方向ａに対して角度α１，β１をなす各方向から入射された周囲光Ｂ１，Ｃ１を積極的に検出することが可能となる。 On the other hand, in the light guide 5 according to the first embodiment, the light guides 5b-1 and 5c-1 are along the respective directions forming the angles α2 and β2 with respect to the normal direction a of the display surface 2. And branched from the light incident portion 5a.
The angles α2 and β2 are angles formed by the ambient light B1 and C1 refracted by entering the light incident portion 5a with respect to the normal direction a of the display surface 2. The ambient lights B1 and C1 are ambient lights that are incident on the light incident surface 5a-1 from directions that form angles α1 and β1 with respect to the normal direction a of the display surface 2. Therefore, by using this light guide 5, it is possible to positively detect the ambient light B 1 and C 1 incident from each direction forming angles α 1 and β 1 with respect to the normal direction a of the display surface 2. Become.
　図７は、周囲光Ｂ１が入射された角度α１と、導光体５により導光された周囲光Ｂ１の照度との関係を示すグラフである。図７において、α１をマイナス方向の角度と定義し、導光体５の導光部５ｂ－１が、α１＝－３０°を有する方向に沿った形状であるものとしている。図７に示すように、角度α１を有する方向から入射された周囲光Ｂ１の照度が最大値となっている。すなわち、導光体５によってディスプレイ面２の法線方向ａに対して角度α１をなす方向から入射された周囲光Ｂ１が効率的に導光されて照度センサ７に検出されることが分かる。 FIG. 7 is a graph showing the relationship between the angle α1 at which the ambient light B1 is incident and the illuminance of the ambient light B1 guided by the light guide 5. In FIG. 7, α1 is defined as an angle in the minus direction, and the light guide portion 5b-1 of the light guide 5 is assumed to have a shape along the direction having α1 = −30 °. As shown in FIG. 7, the illuminance of the ambient light B1 incident from the direction having the angle α1 is the maximum value. That is, it can be seen that the ambient light B1 incident from the direction that forms the angle α1 with respect to the normal direction a of the display surface 2 by the light guide 5 is efficiently guided and detected by the illuminance sensor 7.
　次に、表示特性の調整の具体的な内容について説明する。
　例えば、図６に示す周囲光Ｂ１は、一部がディスプレイ面２で反射されて運転席の乗員の眼に入り、残りは入光面５ａ－１に入射される。ここで、入光面５ａ－１に入射された周囲光Ｂ１は、導光部５ｂ－１によって出光面５ｂ－２まで導光されて出射される。出光面５ｂ－２から出射された周囲光Ｂ１は、照度センサ７により検出される。
　照度センサ７は、このように検出された周囲光Ｂ１の強度に応じた電気信号を生成して制御部に出力する。制御部は、照度センサ７から入力された電気信号に応じて、例えば、液晶モジュール２ｂのバックライト光源部の出力を制御する。これにより、周囲光Ｂ１の強度に応じて画面の輝度が調整される。 Next, specific contents of the display characteristic adjustment will be described.
For example, a part of the ambient light B1 shown in FIG. 6 is reflected by the display surface 2 and enters the eyes of the passenger in the driver's seat, and the rest is incident on the light incident surface 5a-1. Here, the ambient light B1 incident on the light incident surface 5a-1 is guided to the light output surface 5b-2 by the light guide 5b-1 and emitted. The ambient light B1 emitted from the light exit surface 5b-2 is detected by the illuminance sensor 7.
The illuminance sensor 7 generates an electrical signal corresponding to the intensity of the ambient light B1 detected in this way and outputs it to the control unit. The control unit controls the output of the backlight light source unit of the liquid crystal module 2b, for example, according to the electrical signal input from the illuminance sensor 7. Thereby, the brightness | luminance of a screen is adjusted according to the intensity | strength of ambient light B1.
　なお、図３には制御部を記載していないが、制御部は、パネル部３あるいは本体部４の内部に搭載される。制御部は、専用のハードウェアの処理回路であってもよいが、メモリに格納されたプログラムを読み出して実行するＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）を用いて実現してもよい。 Although the control unit is not illustrated in FIG. 3, the control unit is mounted inside the panel unit 3 or the main body unit 4. The control unit may be a dedicated hardware processing circuit, but may be realized by using a CPU (Central Processing Unit) that reads and executes a program stored in the memory.
　また、助手席側と運転席側のいずれの調整を優先するかを予め決定しておいてもよい。
　例えば、運転席側を優先する場合に、制御部は、周囲光Ｂ１に応じて画面の表示特性を調整する。この場合、周囲光Ｃ１が強く入射されても運転席側からの視認には影響が低いので、制御部は、周囲光Ｃ１に応じた調整を行わない。
　このように優先して調整する側を決定しておくことで、不要な調整がなくなり、これに要する消費電力を低減できる。 In addition, it may be determined in advance which adjustment on the passenger side or the driver side is prioritized.
For example, when giving priority to the driver's seat side, the control unit adjusts the display characteristics of the screen according to the ambient light B1. In this case, even if the ambient light C1 is strongly incident, the visual recognition from the driver's seat side is less affected, so the control unit does not perform adjustment according to the ambient light C1.
By determining the side to be preferentially adjusted in this way, unnecessary adjustment is eliminated, and power consumption required for this can be reduced.
　さらに、制御部が、ディスプレイ装置１で表示するコンテンツに応じて助手席側と運転席側とのどちらを優先するかを切り替えてもよい。
　例えば、映画などの映像を表示する場合は、運転を行う運転者が継続して視聴することはないので、制御部は、助手席側の調整を優先する。
　また、ナビゲーションの地図画面を表示する場合は運転に必要な情報であることので、制御部は、運転席側の調整を優先する。 Further, the control unit may switch between the passenger seat side and the driver seat side according to the content displayed on the display device 1.
For example, when displaying an image such as a movie, the driver does not continuously view the image, so the control unit gives priority to adjustment on the passenger seat side.
In addition, since the navigation map screen is information necessary for driving, the control unit gives priority to adjustment on the driver's seat side.
　なお、これまでの説明では、助手席側と運転席側との水平方向に周囲光が反射する場合を示したが、これに限定されるものではない。
　例えば、導光体５を、導光部５ｂ－１，５ｃ－１がディスプレイ面２の上下方向になるように配置することにより、鉛直方向に反射する周囲光を導光して積極的に検出するように構成してもよい。すなわち、実施の形態１における導光部は、ディスプレイ面２の法線方向ａに対して予め定められた角度をなす各方向に沿って入光部５ａから分岐していればよく、これらの方向には様々な方向が考えられる。 In the description so far, the case where ambient light is reflected in the horizontal direction between the passenger seat side and the driver seat side has been described, but the present invention is not limited to this.
For example, by arranging the light guide 5 so that the light guide portions 5b-1 and 5c-1 are in the vertical direction of the display surface 2, the ambient light reflected in the vertical direction is guided and actively detected. You may comprise. That is, the light guide unit in the first embodiment only has to branch from the light incident unit 5a along each direction that forms a predetermined angle with respect to the normal direction a of the display surface 2. There are many possible directions.
　次に、実施の形態１における導光体の変形例について説明する。
　図８Ａは、実施の形態１における変形例の導光体５Ａを示す斜視図である。図８Ｂは、導光体５Ａを示す上面図である。図８Ｃは、導光体５Ａを示す側面図である。
　導光体５Ａは、入光面５ａ－１を有した入光部５ａと、入光部５ａから分岐して設けられた導光部５ｆ－１，５ｇ－１とを備えている。
　導光部５ｆ－１，５ｇ－１は、導光部５ｂ－１，５ｃ－１と同様に、ディスプレイ面２の法線方向ａに対して角度α２，β２をなす各方向に沿って入光部５ａから分岐して設けられており、出光面５ｆ－２，５ｃ－２をそれぞれが有する。 Next, a modification of the light guide in the first embodiment will be described.
FIG. 8A is a perspective view showing a light guide 5A according to a modification of the first embodiment. FIG. 8B is a top view showing the light guide 5A. FIG. 8C is a side view showing the light guide 5A.
The light guide 5A includes a light incident portion 5a having a light incident surface 5a-1 and light guide portions 5f-1 and 5g-1 provided by branching from the light incident portion 5a.
The light guides 5f-1 and 5g-1 receive light along directions that form angles α2 and β2 with respect to the normal direction a of the display surface 2 in the same manner as the light guides 5b-1 and 5c-1. Branched from the portion 5a, each has light exit surfaces 5f-2 and 5c-2.
　ただし、導光部５ｆ－１，５ｇ－１は、ディスプレイ面２側に曲がっておらず、図８Ｃに示すように、入光部５ａと導光部５ｆ－１，５ｇ－１とが同一の平面上にある。
　すなわち、導光体５Ａは、図８Ａおよび図８Ｂに示すように、Ｙ字形状を有している。
　この構成は、入光面５ａ－１から出光面５ｆ－２，５ｇ－２までの奥行きが長く、その分だけ大きな取り付け空間が必要となる。ただし、導光体５と同様に、ディスプレイ面２の法線方向ａに対して特定の角度を有する複数の方向の光を効率的に導光することができる。 However, the light guide portions 5f-1 and 5g-1 are not bent toward the display surface 2, and the light incident portion 5a and the light guide portions 5f-1 and 5g-1 are the same as shown in FIG. 8C. It is on a plane.
That is, the light guide 5A has a Y shape as shown in FIGS. 8A and 8B.
In this configuration, the depth from the light incident surface 5a-1 to the light exit surfaces 5f-2 and 5g-2 is long, and a correspondingly large mounting space is required. However, similarly to the light guide 5, light in a plurality of directions having specific angles with respect to the normal direction a of the display surface 2 can be efficiently guided.
　また、図９Ａは、実施の形態１における別の変形例の導光体５Ｂを示す正面図である。図９Ｂは、導光体５Ｂを示す上面図である。図９Ｃは、導光体５Ｂを示す側面図である。
　導光体５Ｂは、入光面５ａ－１を有した入光部５ａと、入光部５ａから分岐して設けられた導光部５ｂ－１，５ｈ－１，５ｃ－１と、取り付け片部５ｄ，５ｅを備えている。
　導光体５Ｂにおいて、導光部５ｂ－１，５ｃ－１は、ディスプレイ面２の法線方向ａに対して角度α２，β２をなす各方向に沿って入光部５ａから分岐して設けられている。
　一方、導光部５ｈ－１は、ディスプレイ面２の法線方向ａに対して角度０°をなす方向に沿って入光部５ａから延びて設けられ、出光面５ｈ－２を有する。 FIG. 9A is a front view showing a light guide 5B of another modified example in the first exemplary embodiment. FIG. 9B is a top view showing the light guide 5B. FIG. 9C is a side view showing the light guide 5B.
The light guide 5B includes a light incident portion 5a having a light incident surface 5a-1, light guide portions 5b-1, 5h-1, and 5c-1 that are branched from the light incident portion 5a, and attachment pieces. Part 5d, 5e is provided.
In the light guide 5B, the light guide portions 5b-1 and 5c-1 are provided to be branched from the light incident portion 5a along directions that form angles α2 and β2 with respect to the normal direction a of the display surface 2. ing.
On the other hand, the light guide portion 5h-1 is provided extending from the light incident portion 5a along a direction that forms an angle of 0 ° with respect to the normal direction a of the display surface 2, and has a light exit surface 5h-2.
　導光体５Ｂでは、導光部５ｂ－１，５ｃ－１によってディスプレイ面２の法線方向ａに対して角度α２，β２をなす各方向からの光が導光され、さらに導光部５ｈ－１によってディスプレイ面２の法線方向ａに沿って入射された光が効率的に導光される。
　例えば、ディスプレイ装置１が、車両のセンターパネルに搭載されたディスプレイ装置である場合、導光体５Ｂを用いることで車両の後方からの周囲光も効率的に導光することが可能となる。 In the light guide 5B, light from each direction forming angles α2 and β2 with respect to the normal direction a of the display surface 2 is guided by the light guides 5b-1 and 5c-1, and further, the light guide 5h- 1, the light incident along the normal direction a of the display surface 2 is efficiently guided.
For example, when the display device 1 is a display device mounted on a center panel of a vehicle, ambient light from the rear of the vehicle can be efficiently guided by using the light guide 5B.
　なお、これまで導光部の数が２つと３つの構成を示したが、実施の形態１に係る導光体は、４つ以上の導光部を備えていてもよい。すなわち、実施の形態１における導光部は、ディスプレイ面２の法線方向ａに対して予め定められた角度をなす各方向に沿って入光部５ａから分岐していればよく、これらの方向には様々な方向が考えられる。 In addition, although the number of the light guide parts was shown as two and three structures so far, the light guide according to the first embodiment may include four or more light guide parts. That is, the light guide unit in the first embodiment only has to branch from the light incident unit 5a along each direction that forms a predetermined angle with respect to the normal direction a of the display surface 2. There are many possible directions.
　以上のように、実施の形態１に係る導光体５は、入光面５ａ－１を有した入光部５ａと導光部５ｂ－１，５ｃ－１を備える。導光部５ｂ－１，５ｃ－１は、ディスプレイ面２の法線方向ａに対して角度α２，β２をなす各方向に沿って入光部５ａから分岐して設けられ、出光面５ｂ－２，５ｃ－２をそれぞれが有している。
　このように構成することにより、ディスプレイ面２の法線方向ａに対して特定の角度を有する複数の方向の光が導光されるので、これらの方向から入射する光をそれぞれ検出することができる。従って、上記複数の方向からディスプレイ面２に入射して反射する光に応じた表示特性の調整が可能となり、複数の方向からの画面表示の視認性を向上させることができる。なお、変形例である導光体５Ａ，５Ｂにおいても、上記と同様の効果を得ることができる。 As described above, the light guide 5 according to the first embodiment includes the light incident portion 5a having the light incident surface 5a-1 and the light guide portions 5b-1 and 5c-1. The light guide portions 5b-1 and 5c-1 are provided to be branched from the light incident portion 5a along the directions that form angles α2 and β2 with respect to the normal direction a of the display surface 2, and the light exit surface 5b-2. , 5c-2.
With this configuration, light in a plurality of directions having specific angles with respect to the normal direction a of the display surface 2 is guided, and thus light incident from these directions can be detected respectively. . Therefore, it is possible to adjust the display characteristics according to the light incident on the display surface 2 and reflected from the plurality of directions, and the visibility of the screen display from the plurality of directions can be improved. In the light guides 5A and 5B which are modifications, the same effect as described above can be obtained.
　また、実施の形態１の導光部５ｂ－１，５ｃ－１は、ディスプレイ面２の側に曲がった形状であるので、導光体５の寸法に起因したパネル部３の厚さの増大が抑えられ、ひいてはディスプレイ装置１の小型化が可能となる。さらに、導光部５ｂ－１，５ｃ－１の曲げ形状のＲを大きくすることで、全反射による光の伝搬の効率が向上する。 In addition, since the light guide portions 5b-1 and 5c-1 of the first embodiment are bent toward the display surface 2, the thickness of the panel portion 3 due to the dimensions of the light guide 5 is increased. As a result, the display device 1 can be downsized. Further, by increasing the bent shape R of the light guide portions 5b-1 and 5c-1, the light propagation efficiency by total reflection is improved.
　さらに、実施の形態１に係るディスプレイ装置１は、導光体５と、入光部５ａの入光面５ａ－１が露出されたディスプレイ面２を有するパネル部３と、導光体５の出光面５ｂ－２，５ｃ－２から出射された光をそれぞれ検出する照度センサ７とを備えている。
　このように構成することで、上記と同様の効果が得られるディスプレイ装置を提供することが可能となる。 Furthermore, the display device 1 according to Embodiment 1 includes the light guide 5, the panel unit 3 having the display surface 2 where the light incident surface 5 a-1 of the light incident unit 5 a is exposed, and the light output of the light guide 5. And an illuminance sensor 7 for detecting light emitted from the surfaces 5b-2 and 5c-2.
By comprising in this way, it becomes possible to provide the display apparatus from which the effect similar to the above is acquired.
実施の形態２．
　図１０は、この発明の実施の形態２に係るディスプレイ装置１Ａを示す斜視図である。図１１は、実施の形態２における導光体５Ｃの一例を示す斜視図である。
　ディスプレイ装置１Ａは、実施の形態１と同様に、特定の箇所に取り付けられて、複数の方向からディスプレイ面２Ａの表示が視認される場合があるディスプレイ装置である。
　また、ディスプレイ装置１Ａは、ディスプレイ面２Ａを有したパネル部３Ａと、パネル部３Ａが取り付けられた本体部４とを備える。 Embodiment 2. FIG.
FIG. 10 is a perspective view showing a display device 1A according to Embodiment 2 of the present invention. FIG. 11 is a perspective view showing an example of the light guide 5C in the second embodiment.
Similar to the first embodiment, the display device 1A is attached to a specific location, and the display on the display surface 2A may be visually recognized from a plurality of directions.
The display device 1A includes a panel unit 3A having a display surface 2A and a main body unit 4 to which the panel unit 3A is attached.
　ディスプレイ面２Ａは、ディスプレイ面２と同様に、情報が表示される表示面と同一または平行な面であって、例えば、表示面とこの表示面の周囲に設けられた非表示領域とを含む面として実現される。また、ディスプレイ面２Ａは、ガラスまたは透明な樹脂材料で形成されたカバー板２ａによって構成されている。
　パネル部３Ａは、ディスプレイ面２Ａに情報を表示する表示パネルであって、図１０に示すように、ディスプレイ側入光面２ｃがディスプレイ面２Ａの一部に露出されている。 Similar to the display surface 2, the display surface 2A is a surface that is the same or parallel to the display surface on which information is displayed, and includes, for example, a display surface and a non-display area provided around the display surface. As realized. The display surface 2A is configured by a cover plate 2a formed of glass or a transparent resin material.
The panel unit 3A is a display panel that displays information on the display surface 2A. As shown in FIG. 10, the display-side light incident surface 2c is exposed at a part of the display surface 2A.
　ディスプレイ側入光面２ｃは、周囲光が入射される入光面であり、ディスプレイ面２Ａを構成するカバー板２ａの非表示領域に設けられる。例えば、ディスプレイ側入光面２ｃは、非表示領域におけるディスプレイ側入光面２ｃ以外の部分に非透光性の塗装を施して形成される。ディスプレイ側入光面２ｃ以外の部分を非透光性の材料で形成してもよい。これにより、ディスプレイ側入光面２ｃの周囲から不要な光がパネル部３Ａの内部に侵入することを防止できる。 The display side light incident surface 2c is a light incident surface on which ambient light is incident, and is provided in a non-display area of the cover plate 2a constituting the display surface 2A. For example, the display side light incident surface 2c is formed by applying a non-transparent coating to a portion other than the display side light incident surface 2c in the non-display area. A portion other than the display side light incident surface 2c may be formed of a non-translucent material. Thereby, unnecessary light can be prevented from entering the inside of the panel unit 3A from the periphery of the display-side light incident surface 2c.
　導光体５Ｃは、この発明におけるディスプレイ用導光体を具体化したものであり、出光面５ｂ－２，５ｃ－２から周囲光を出射することで、図１１に破線で示す照度センサ７へ導光する。また、導光体５Ｃは、例えば、透明な樹脂材料で構成されており、導光部５ｂ－１，５ｃ－１、取り付け片部５ｄ，５ｅおよび連結部５ｉを備える。 The light guide 5C embodies the display light guide of the present invention, and emits ambient light from the light exit surfaces 5b-2 and 5c-2 to the illuminance sensor 7 indicated by a broken line in FIG. Light guide. The light guide 5C is made of, for example, a transparent resin material, and includes light guide portions 5b-1, 5c-1, attachment pieces 5d, 5e, and a connecting portion 5i.
　なお、導光部５ｂ－１，５ｃ－１と、取り付け片部５ｄ，５ｅと、連結部５ｉとを樹脂材料で一体に成形してもよい。このように構成することで、部品点数を削減でき、導光体５Ｃを備えたディスプレイ装置１Ａを安価に提供することができる。
　また、導光体５Ｃの材料として、ガラスまたは中空のゴムチューブを使用してもよい。 The light guide portions 5b-1, 5c-1, the attachment pieces 5d, 5e, and the connecting portion 5i may be integrally formed of a resin material. By comprising in this way, a number of parts can be reduced and the display apparatus 1A provided with 5 C of light guides can be provided cheaply.
Moreover, you may use glass or a hollow rubber tube as a material of 5 C of light guides.
　図１２Ａは導光体５Ｃを示す正面図、図１２Ｂは導光体５Ｃを示す上面図、図１２Ｃは導光体５Ｃを示す側面図である。また、図１３は導光体５Ｃと周囲光Ｂ１，Ｃ１との関係を示す図であり、パネル部３Ａの内部に取り付けられた導光体５Ｃを上方から見た様子を示している。導光部５ｂ－１，５ｃ－１は、ディスプレイ面２Ａの法線方向ａに対して角度α２，β２をなす各方向に沿って設けられ、入光面５ｂ－１ａ，５ｃ－１ａと出光面５ｂ－２，５ｃ－２とをそれぞれが有する。 12A is a front view showing the light guide 5C, FIG. 12B is a top view showing the light guide 5C, and FIG. 12C is a side view showing the light guide 5C. FIG. 13 is a diagram showing the relationship between the light guide 5C and the ambient light B1 and C1, and shows a state in which the light guide 5C attached to the inside of the panel portion 3A is viewed from above. The light guides 5b-1 and 5c-1 are provided along each direction forming angles α2 and β2 with respect to the normal direction a of the display surface 2A, and the light incident surfaces 5b-1a and 5c-1a and the light exit surface 5b-2 and 5c-2, respectively.
　連結部５ｉは、導光部５ｂ－１と導光部５ｃ－１とを連結する部材であって、図１３に示すように、導光部５ｂ－１と導光部５ｃ－１とが上記各方向に沿った状態が維持されるように連結している。
　また、導光体５Ｃは、取り付け片部５ｄ，５ｅを用いてパネル部３Ａの内部に取り付けられる。このとき、図１３に示すように、入光面５ｂ－１ａ，５ｃ－１ａが、ディスプレイ面２Ａの裏面側からディスプレイ側入光面２ｃに対向するように配置される。
　出光面５ｂ－２，５ｃ－２はそれぞれに対応した照度センサ７の受光面に対向して配置される。 The connecting part 5i is a member for connecting the light guide part 5b-1 and the light guide part 5c-1, and as shown in FIG. 13, the light guide part 5b-1 and the light guide part 5c-1 are connected to each other. It connects so that the state along each direction may be maintained.
The light guide 5C is attached to the inside of the panel portion 3A using the attachment pieces 5d and 5e. At this time, as shown in FIG. 13, the light incident surfaces 5b-1a and 5c-1a are arranged so as to face the display side light incident surface 2c from the back surface side of the display surface 2A.
The light exit surfaces 5b-2 and 5c-2 are arranged to face the light receiving surfaces of the corresponding illuminance sensors 7.
　前述したように、ディスプレイ側入光面２ｃはディスプレイ面２Ａの一部に配置されるので、ディスプレイ側入光面２ｃの法線方向はディスプレイ面２Ａの法線方向ａと等しくなる。さらに、ディスプレイ面２Ａの法線方向ａに対して特定の角度を有する方向からの周囲光がディスプレイ面２Ａに入射された場合、ディスプレイ側入光面２ｃにおいても、同じ方向からの周囲光が入射される。 As described above, since the display side light incident surface 2c is disposed on a part of the display surface 2A, the normal direction of the display side light incident surface 2c is equal to the normal direction a of the display surface 2A. Further, when ambient light from a direction having a specific angle with respect to the normal direction a of the display surface 2A is incident on the display surface 2A, ambient light from the same direction is also incident on the display side light incident surface 2c. Is done.
　ディスプレイ側入光面２ｃに入射された光は、ディスプレイ面２Ａを透過して裏面側へ出射され、入光面５ｂ－１ａ，５ｃ－１ａに入射される。入光面５ｂ－１ａ，５ｃ－１ａに入射された光は、導光部５ｂ－１，５ｃ－１の内部における全反射により出光面５ｂ－２，５ｃ－２へ伝搬される。
　なお、導光部５ｂ－１，５ｃ－１の径を小さくするか、導光部５ｂ－１，５ｃ－１の長さを長くすることで、この全反射による光の伝搬の効率が向上する。
　また、導光部５ｂ－１，５ｃ－１の形状としては、例えば、内周面を鏡面状にした円筒形状の部材であってもよい。この構造では、円筒形状の中心軸に沿って光が伝搬する。 The light incident on the display side light incident surface 2c is transmitted through the display surface 2A and emitted to the rear surface side, and is incident on the light incident surfaces 5b-1a and 5c-1a. The light incident on the light incident surfaces 5b-1a and 5c-1a is propagated to the light exit surfaces 5b-2 and 5c-2 by total reflection inside the light guide portions 5b-1 and 5c-1.
Note that the light propagation efficiency by total reflection is improved by reducing the diameters of the light guides 5b-1 and 5c-1 or increasing the lengths of the light guides 5b-1 and 5c-1. .
Further, as the shape of the light guide portions 5b-1 and 5c-1, for example, a cylindrical member whose inner peripheral surface is a mirror surface may be used. In this structure, light propagates along the cylindrical central axis.
　また、導光部５ｂ－１，５ｃ－１は、ディスプレイ面２Ａ側に曲がった形状になっている。このように構成することで、パネル部３Ａの内部におけるディスプレイ面２Ａの裏面側に沿った狭い空間に導光体５Ｃを配置することができる。これによって、導光体５Ｃの寸法に起因したパネル部３Ａの厚さの増大が抑えられ、ひいてはディスプレイ装置１Ａの小型化が可能となる。
　なお、導光部５ｂ－１，５ｃ－１の曲げ形状のＲを大きくすることでも全反射による光の伝搬の効率が向上する。 Further, the light guide portions 5b-1 and 5c-1 are bent to the display surface 2A side. With this configuration, the light guide 5C can be arranged in a narrow space along the back surface side of the display surface 2A inside the panel portion 3A. As a result, an increase in the thickness of the panel portion 3A due to the size of the light guide 5C is suppressed, and the display device 1A can be downsized.
Increasing the bent shape R of the light guide portions 5b-1 and 5c-1 also improves the light propagation efficiency by total reflection.
　図１３において、周囲光Ｂ１は、ディスプレイ面２Ａの法線方向ａに対して角度α１を有した助手席側からの方向でディスプレイ側入光面２ｃに入射した周囲光である。
　この周囲光Ｂ１の一部はディスプレイ側入光面２ｃを透過するが、残りは反射光Ｂ２として運転席側へ反射される。実施の形態２において、角度α２は、ディスプレイ側入光面２ｃに入射されて屈折し、さらに入光面５ｂ－１ａに入射されて屈折した周囲光Ｂ１が、ディスプレイ面２Ａの法線方向ａに対してなす角度である。 In FIG. 13, the ambient light B1 is ambient light incident on the display-side light incident surface 2c in a direction from the passenger seat side having an angle α1 with respect to the normal direction a of the display surface 2A.
A part of the ambient light B1 passes through the display side light incident surface 2c, but the rest is reflected as reflected light B2 toward the driver's seat. In the second embodiment, the angle α2 is incident on the display-side light incident surface 2c and refracted, and the ambient light B1 incident on and refracted by the light incident surface 5b-1a is in the normal direction a of the display surface 2A. It is the angle to make.
　周囲光Ｃ１は、ディスプレイ面２の法線方向ａに対して角度β１を有した運転席側からの方向でディスプレイ側入光面２ｃに入射した周囲光である。この周囲光Ｃ１の一部はディスプレイ側入光面２ｃを透過するが、残りは反射光Ｃ２として助手席側へ反射される。
　実施の形態２において、角度β２は、ディスプレイ側入光面２ｃに入射されて屈折し、さらに入光面５ｃ－１ａに入射されて屈折した周囲光Ｃ１が、ディスプレイ面２Ａの法線方向ａに対してなす角度である。 The ambient light C1 is ambient light incident on the display-side light incident surface 2c in a direction from the driver's seat side having an angle β1 with respect to the normal direction a of the display surface 2. A part of the ambient light C1 passes through the display-side light incident surface 2c, but the rest is reflected as reflected light C2 toward the passenger seat.
In the second embodiment, the angle β2 is incident on the display side light incident surface 2c and refracted, and the ambient light C1 incident on the light incident surface 5c-1a is refracted in the normal direction a of the display surface 2A. It is the angle to make.
　なお、実施の形態１で示した導光体５，５Ａ，５Ｂでは、複数の導光部が共通の入光部５ａから分岐した構成であったので、入光面５ａ－１に入射された光の一部が、隣接する導光部にも分岐して導光の効率が低下する場合があった。これに対して、実施の形態２における導光体５Ｃの導光部５ｂ－１，５ｃ－１では、ディスプレイ側入光面２ｃと入光面５ｂ－１ａ，５ｃ－１ａとの間にギャップがある。
　このように構成することによって、隣接する導光部への分岐がなくなり、導光の効率が向上する。従って、実施の形態１と比較して、より指向性を持った周囲光の検出が可能となる。 In the light guides 5, 5A and 5B shown in the first embodiment, since a plurality of light guide portions are branched from the common light entrance portion 5a, they are incident on the light entrance surface 5a-1. In some cases, a part of the light also branches to an adjacent light guide unit, and the efficiency of light guide decreases. On the other hand, in the light guide portions 5b-1 and 5c-1 of the light guide 5C in Embodiment 2, there is a gap between the display side light incident surface 2c and the light incident surfaces 5b-1a and 5c-1a. is there.
By comprising in this way, the branching to an adjacent light guide part is lose | eliminated and the efficiency of light guide improves. Therefore, it becomes possible to detect ambient light with more directivity than in the first embodiment.
　次に、表示特性の調整の具体的な内容について説明する。
　例えば、周囲光Ｂ１は、一部がディスプレイ面２Ａで反射されて、運転席の乗員の眼に入り、残りはディスプレイ側入光面２ｃに入射される。ディスプレイ側入光面２ｃに入射された周囲光Ｂ１は、さらに入光面５ｂ－１ａに入射される。
　入光面５ｂ－１ａに入射された周囲光Ｂ１は、導光部５ｂ－１によって出光面５ｂ－２まで導光されて出射される。出光面５ｂ－２から出射された周囲光Ｂ１は、照度センサ７によって検出される。照度センサ７は、このように検出された周囲光Ｂ１の強度に応じた電気信号を生成して制御部に出力する。制御部は、照度センサ７から入力された電気信号に応じて、例えば、液晶モジュール２ｂのバックライト光源部の出力を制御する。これにより、周囲光Ｂ１の強度に応じて画面の輝度が調整される。 Next, specific contents of the display characteristic adjustment will be described.
For example, a part of the ambient light B1 is reflected by the display surface 2A and enters the eyes of the driver's occupant, and the rest is incident on the display-side light incident surface 2c. The ambient light B1 incident on the display side light incident surface 2c is further incident on the light incident surface 5b-1a.
The ambient light B1 incident on the light incident surface 5b-1a is guided to the light output surface 5b-2 by the light guide 5b-1 and emitted. The ambient light B1 emitted from the light exit surface 5b-2 is detected by the illuminance sensor 7. The illuminance sensor 7 generates an electrical signal corresponding to the intensity of the ambient light B1 detected in this way and outputs it to the control unit. The control unit controls the output of the backlight light source unit of the liquid crystal module 2b, for example, according to the electrical signal input from the illuminance sensor 7. Thereby, the brightness | luminance of a screen is adjusted according to the intensity | strength of ambient light B1.
　次に、実施の形態２に係る導光体５Ｃの変形例について説明する。
　導光体５Ｃの導光部５ｂ－１，５ｃ－１を、導光体５Ａのように、ディスプレイ面２Ａ側に曲げない形状で構成してもよい。
　この構成は、入光面５ｂ－１ａ，５ｃ－１ａから出光面５ｂ－２，５ｃ－２までの奥行きが長いため、その分だけ大きな取り付け空間が必要となる。
　ただし、このように構成しても、ディスプレイ面２Ａの法線方向ａに対して特定の角度を有する複数の方向の光を効率的に導光することができる。 Next, a modification of the light guide 5C according to Embodiment 2 will be described.
The light guide portions 5b-1 and 5c-1 of the light guide 5C may be configured in a shape that does not bend toward the display surface 2A, like the light guide 5A.
In this configuration, since the depth from the light incident surfaces 5b-1a and 5c-1a to the light exit surfaces 5b-2 and 5c-2 is long, a larger mounting space is required.
However, even if comprised in this way, the light of the several direction which has a specific angle with respect to the normal line direction a of 2 A of display surfaces can be guided efficiently.
　また、導光体５Ｃにおいて、導光部を３つ以上設けてもよい。
　すなわち、実施の形態２における導光部は、ディスプレイ面２Ａの法線方向ａに対して予め定められた角度をなす各方向に沿って設けられていればよく、これらの方向には様々な方向が考えられる。 In the light guide 5C, three or more light guides may be provided.
That is, the light guide unit in the second embodiment may be provided along each direction that forms a predetermined angle with respect to the normal direction a of the display surface 2A. Can be considered.
　以上のように、実施の形態２に係る導光体５Ｃは、導光部５ｂ－１，５ｃ－１と連結部５ｉとを備える。導光部５ｂ－１，５ｃ－１は、ディスプレイ面２Ａの法線方向ａに対して角度α２，β２をなす各方向に沿って設けられ、入光面５ｂ－１ａ，５ｃ－１ａと出光面５ｂ－２，５ｃ－２とをそれぞれが有する。連結部５ｉは、導光部５ｂ－１，５ｃ－１を連結する。このように構成しても、ディスプレイ面２Ａの法線方向ａに対して特定の角度を有する複数の方向の光が導光されるので、これらの方向から入射する光をそれぞれ検出することができる。従って、上記複数の方向からディスプレイ面２Ａに入射して反射する光に応じた表示特性の調整が可能となり、複数の方向からの画面表示の視認性を向上させることができる。 As described above, the light guide 5C according to Embodiment 2 includes the light guide portions 5b-1 and 5c-1 and the connecting portion 5i. The light guides 5b-1 and 5c-1 are provided along each direction forming angles α2 and β2 with respect to the normal direction a of the display surface 2A, and the light incident surfaces 5b-1a and 5c-1a and the light exit surface 5b-2 and 5c-2, respectively. The connecting portion 5i connects the light guide portions 5b-1 and 5c-1. Even in this configuration, light in a plurality of directions having specific angles with respect to the normal direction a of the display surface 2A is guided, and thus light incident from these directions can be detected. . Therefore, it is possible to adjust the display characteristics according to the light incident on and reflected from the display surface 2A from a plurality of directions, and the visibility of the screen display from the plurality of directions can be improved.
　実施の形態２に係るディスプレイ装置１Ａは、パネル部３Ａ、導光体５Ｃおよび照度センサ７を備える。パネル部３Ａは、ディスプレイ側入光面２ｃが露出されたディスプレイ面２Ａを有する。導光体５Ｃは、入光面５ｂ－１ａ，５ｃ－１ａを、ディスプレイ面２Ａの裏面側からディスプレイ側入光面２ｃに対向させて配置される。照度センサ７は、出光面５ｂ－２，５ｃ－２から出射された光をそれぞれ検出する。
　このように構成することで、上記と同様の効果が得られるディスプレイ装置１Ａを提供することが可能となる。 A display device 1A according to Embodiment 2 includes a panel unit 3A, a light guide 5C, and an illuminance sensor 7. The panel unit 3A has a display surface 2A from which the display side light incident surface 2c is exposed. The light guide 5C is disposed with the light incident surfaces 5b-1a and 5c-1a facing the display side light incident surface 2c from the back surface side of the display surface 2A. The illuminance sensor 7 detects light emitted from the light exit surfaces 5b-2 and 5c-2, respectively.
With this configuration, it is possible to provide a display device 1A that can obtain the same effects as described above.
　また、実施の形態２では、導光体５Ｃが連結部５ｉを備える構成を示したが、これに限定されるものではない。例えば、連結部５ｉを省略して導光部５ｂ－１，５ｃ－１を別個に装置内に固定してもよい。すなわち、実施の形態２に係るディスプレイ装置１Ａが備える導光体５Ｃでは、連結部５ｉが必須の構成ではなく、導光部５ｂ－１，５ｃ－１が別個に固定される構成であってもよい。この場合、導光部５ｂ－１，５ｃ－１の入光面５ｂ－１ａ，５ｃ－１ａが、ディスプレイ面２Ａの裏面側からディスプレイ側入光面２ｃに対向して配置される。 Moreover, in Embodiment 2, although the light guide 5C showed the structure provided with the connection part 5i, it is not limited to this. For example, the connecting portion 5i may be omitted and the light guide portions 5b-1 and 5c-1 may be separately fixed in the apparatus. That is, in the light guide 5C provided in the display device 1A according to Embodiment 2, the connecting portion 5i is not an essential configuration, and the light guide portions 5b-1 and 5c-1 may be separately fixed. Good. In this case, the light incident surfaces 5b-1a and 5c-1a of the light guides 5b-1 and 5c-1 are arranged to face the display side light incident surface 2c from the back surface side of the display surface 2A.
　なお、本発明はその発明の範囲内において、各実施の形態の自由な組み合わせ、あるいは各実施の形態の任意の構成要素の変形、もしくは各実施の形態において任意の構成要素の省略が可能である。 In the present invention, within the scope of the invention, any combination of each embodiment, any component of each embodiment can be modified, or any component can be omitted in each embodiment. .
　この発明に係るディスプレイ用導光体は、複数の方向からの画面表示の視認性を向上させることができるので、例えば、車両の座席ごとの方向から画面表示が視認される車載用のディスプレイ装置に好適である。 Since the display light guide according to the present invention can improve the visibility of screen display from a plurality of directions, for example, in an in-vehicle display device in which screen display is visually recognized from the direction of each seat of the vehicle. Is preferred.
　１，１Ａ　ディスプレイ装置、２，２Ａ　ディスプレイ面、２ａ　カバー板、２ｂ　液晶モジュール、２ｃ　ディスプレイ側入光面、３，３Ａ　パネル部、４　本体部、５，５Ａ～５Ｃ　導光体、５ａ　入光部、５ａ－１，５ｂ－１ａ，５ｃ－１ａ　入光面、５ｂ－１，５ｃ－１，５ｆ－１，５ｇ－１，５ｈ－１　導光部、５ｂ－２，５ｃ－２，５ｆ－２，５ｇ－２，５ｈ－２　出光面、５ｄ，５ｅ　取り付け片部、５ｉ　連結部、６　液晶ベース部材、７　照度センサ、８　プリント回路基板、９　基板ベース部材、１０　孔部。 1,1A display device, 2,2A display surface, 2a cover plate, 2b liquid crystal module, 2c display side light incident surface, 3,3A panel portion, 4, main body portion, 5,5A-5C light guide, 5a light incident portion 5a-1, 5b-1a, 5c-1a Light incident surface, 5b-1, 5c-1, 5f-1, 5g-1, 5h-1 Light guiding part, 5b-2, 5c-2, 5f-2 , 5g-2, 5h-2, light emitting surface, 5d, 5e mounting piece, 5i connecting portion, 6 liquid crystal base member, 7 illuminance sensor, 8 printed circuit board, 9 substrate base member, 10 holes.

Claims (6)

  1. 　光が入射される入光面を有した入光部と、
    　ディスプレイ面の法線方向に対して予め定められた角度をなす複数の方向に沿って前記入光部から分岐して設けられ、光が出射される出光面をそれぞれが有した複数の導光部と
    を備えたことを特徴とするディスプレイ用導光体。     A light incident part having a light incident surface on which light is incident;
    A plurality of light guides each provided with a light exit surface that is branched from the light incident part along a plurality of directions that form a predetermined angle with respect to the normal direction of the display surface. And a light guide for a display.
  2. 　前記複数の導光部は、ディスプレイ面の側に曲がった形状であることを特徴とする請求項１記載のディスプレイ用導光体。 The display light guide according to claim 1, wherein the plurality of light guide portions have a shape bent toward the display surface.
  3. 　ディスプレイ面の法線方向に対して予め定められた角度をなす複数の方向のそれぞれに沿って設けられ、光が入射される入光面と光が出射される出光面とをそれぞれが有した複数の導光部と、
    　前記複数の導光部のそれぞれを連結する連結部と
    を備えたことを特徴とするディスプレイ用導光体。     A plurality of light incident surfaces that are provided along each of a plurality of directions that form a predetermined angle with respect to the normal direction of the display surface, each having a light incident surface on which light is incident and a light output surface from which light is emitted. A light guide part,
    A display light guide, comprising: a connecting portion that connects each of the plurality of light guide portions.
  4. 　前記複数の導光部は、ディスプレイ面の側に曲がった形状であることを特徴とする請求項３記載のディスプレイ用導光体。 4. The display light guide according to claim 3, wherein the plurality of light guide portions have a shape bent toward the display surface.
  5. 　請求項１記載のディスプレイ用導光体と、
    　前記入光部の入光面が露出されたディスプレイ面を有するパネル部と、
    　前記複数の導光体の各出光面から出射された光をそれぞれ検出する複数のセンサと
    を備えたことを特徴とするディスプレイ装置。     A light guide for a display according to claim 1,
    A panel unit having a display surface in which a light incident surface of the light incident unit is exposed;
    A display device comprising: a plurality of sensors that respectively detect light emitted from the light exit surfaces of the plurality of light guides.
  6. 　ディスプレイ側入光面が露出されたディスプレイ面を有するパネル部と、
    　ディスプレイ面の法線方向に対して予め定められた角度をなす複数の方向のそれぞれに沿って設けられて、光が入射される入光面と光が出射される出光面とをそれぞれが有した複数の導光部を備え、前記複数の導光部の各入光面が、ディスプレイ面の裏面側から前記ディスプレイ側入光面に対向させて配置されたディスプレイ用導光体と、
    　前記複数の導光体の各出光面から出射された光をそれぞれ検出する複数のセンサと
    を備えたことを特徴とするディスプレイ装置。     A panel unit having a display surface on which the display side light incident surface is exposed;
    Provided along each of a plurality of directions that form a predetermined angle with respect to the normal direction of the display surface, each having a light incident surface on which light is incident and a light output surface from which light is emitted A light guide for a display comprising a plurality of light guides, each light incident surface of the plurality of light guides being disposed to face the display side light incident surface from the back side of the display surface;
    A display device comprising: a plurality of sensors that respectively detect light emitted from the light exit surfaces of the plurality of light guides.
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