JP2013178308A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that hardly causes displacement in a relative position and an angle between a light-emitting display unit and a reflection member.SOLUTION: The display device has: a light-emitting display unit 10 emitting display light L; a reflection member 21 reflecting the display light L emitted by the light-emitting display unit 10; an imaging member 26 projecting the display light L reflected by the reflection member 21; and a heat radiation member 31 fixing the light-emitting display unit 10, the reflection member 21 and the imaging member 26. Second reflection members 51 and 61 reflect the display light L imaged by the imaging member 26, and are housed in a housing 71. The light-emitting display unit 10 includes a display element 14, and light-emitting elements 11B, 11R and 11G irradiating the display element 14 with light.

Description

  The present invention relates to a display device provided with a light emitting display.

  Conventionally, various head-up display devices that display a virtual image in front of a windshield have been proposed. The head-up display device is provided on a dashboard of a vehicle and displays a virtual image by projecting display light onto a windshield. Various display devices are conceivable as display means for projecting display light, and a head-up display device using a projector is disclosed in Patent Document 2.

JP 2010-277065 A JP 2004-126226 A

However, there is a slight deviation in the relative position and angle between the projector and the reflecting mirror (so-called folding mirror) that reflects the display light emitted by the projector, and a desired virtual image may not be obtained. . For example, when the reflecting mirror fixed to the housing is slightly inclined with respect to a desired angle, there is a problem that a part of the virtual image is not displayed.
The present invention has been made in view of this problem, and provides a display device that is less likely to cause a shift in the relative position and angle between the light emitting display and the reflecting member.

  As described in claim 1, the present invention provides a light emitting display 10 that emits display light L, a reflective member 21 that reflects the display light L emitted from the light emitting display 10, and the reflective member 21. An image-forming member 26 that projects the display light L reflected by the light-emitting device, and a heat-dissipating member 31 that fixes the light-emitting display 10, the reflecting member 21, and the image-forming member 26.

  Further, according to the present invention, the light emitting display 10 that emits the display light L, the reflection member 21 that reflects the display light L emitted from the light emitting display 10, and the reflection A first unit including an imaging member 26 that projects the display light L reflected by the member 21, and a heat dissipation member 31 that fixes the light emitting display 10, the reflection member 21, and the imaging member 26. A, a second reflecting member 51, 61 that reflects the display light L imaged by the imaging member 26, and a housing 71 that houses the second reflecting member 51, 61. Unit B.

  Further, according to the present invention, as described in claim 3, the light emitting display 10 includes a display element 14 and light emitting elements 11B, 11R, and 11G that irradiate the display element 14 with light. is there.

  Since the light emitting display and the reflecting member are fixed to the heat radiating member, there is little possibility that the relative position and angle between the light emitting display and the reflecting member are shifted.

Sectional drawing which shows embodiment of this invention. The general-view figure which shows embodiment same as the above. The principal part enlarged view which shows embodiment same as the above.

  Hereinafter, an embodiment in which the present invention is applied to a head-up display device will be described with reference to the accompanying drawings. The head-up display device displays the virtual image V by reflecting the display light L projected by the display device 2 provided on the dashboard 1 of the vehicle to the vehicle driver 4 side by the windshield 3. The vehicle driver 4 can visually recognize the virtual image V superimposed on the landscape.

  The display device 2 includes a first unit A and a second unit B. The first unit A includes a projector (light emitting display) 10, a plane mirror (reflecting member) 21, a transmission screen (imaging member) 26, a heat sink (heat radiating member) 31, a housing 41, and the like. The second unit B includes a plane mirror (second reflecting member) 51, a concave mirror (second reflecting member) 61, a housing 71, and the like.

  The projector 10 includes a light source unit 11, a mirror unit 12, a reflecting mirror 13, a DMD (Digital Micromirror Device) 14, and a projection lens 15, and is fixed to a heat sink 31. The light source unit 11 of the projector 10 includes a blue light emitting diode (light emitting element) 11B, a red light emitting diode (light emitting element) 11R, and a green light emitting diode (light emitting element) 11G.

  The blue light emitting diode 11B, the red light emitting diode 11R, and the green light emitting diode 11G emit blue, red, and green light, respectively. The blue light emitting diode 11B, the red light emitting diode 11R, and the green light emitting diode 11G are in contact with the heat sink 31, and the heat generated by the blue light emitting diode 11B, the red light emitting diode 11R, and the green light emitting diode 11G is released by the heat sink 31.

  The mirror unit 12 includes a reflection mirror 12a and dichroic mirrors 12b and 12c. The reflection mirror 12a reflects the light B emitted from the blue light emitting diode 11B. The dichroic mirror 12b reflects the light R emitted from the red light emitting diode 11R and transmits the light L1 reflected by the reflection mirror 12a. The dichroic mirror 12c reflects the light G emitted from the green light emitting diode 11G and transmits the light L2 transmitted or reflected by the reflection mirror 12b.

  The reflection mirror 13 is a flat mirror, and reflects the light L3 from the mirror unit 12 to the DMD 14. The DMD 14 is a display element in which a large number of minute mirror surfaces are arranged in a plane, and generates display light L. The projection lens 15 enlarges the display light L and projects it onto the plane mirror 21. The projection lens 15 may be composed of a single lens or a plurality of lenses.

  The plane mirror 21 is held by the support member 23 and reflects the display light L from the projector 10 to the transmissive screen 26. The transmissive screen 26 is held by the support member 23, and the display light L from the projector 10 is imaged on the transmissive screen 26. The heat sink 31 is made of metal such as aluminum (Al) and has a plurality of heat radiation fins 31a. The plane mirror 21 and the transmission screen 26 are fixed to the heat sink 31 via the holding member 23. The housing 41 is made of an opaque resin and accommodates the projector 10, the plane mirror 21, and the transmissive screen 26. The housing 41 is formed with a window 41a from which the display light L is emitted.

  The reflector 50 includes a plane mirror 51 and a support member 52. The plane mirror 51 reflects the display light L from the first unit A to the concave mirror 61. The support member 52 is fixed to the housing 71 and holds the plane mirror 35. The reflector 60 includes a concave mirror 61, a mirror holder 62, a stepping motor 63, and a support member 64. The concave mirror 61 is formed by depositing a metal (for example, aluminum) on a resin (for example, polycarbonate) to form a reflective surface 61a. The reflecting surface 61a is a concave surface, and the display light L reflected by the plane mirror 51 is enlarged to display the virtual image V. The concave mirror 61 is bonded to the mirror holder 62 with a double-sided adhesive tape. The mirror holder 62 is made of resin (for example, ABS), and the gear portion 65 and the shaft portion 66 are integrally formed.

  A gear 67 is attached to the rotation shaft of the stepping motor 63, and this gear 67 is engaged with the gear portion 65 of the mirror holder 62. The concave mirror 61 is supported in a rotatable state together with the mirror holder 62, and the projection direction of the display light L can be adjusted by rotating the concave mirror 61 by the stepping motor 63. The vehicle driver 4 operates a pushbutton switch (not shown) to adjust the angle of the concave mirror 61 so that the display light L is reflected at the eye position (that is, the virtual image V can be visually recognized).

  The housing 71 is made of resin (for example, polypropylene) and accommodates the reflectors 50 and 60. The housing 71 is provided with a light shielding wall 71a to prevent a phenomenon (washout) in which external light such as sunlight enters the transmission screen 26 and the virtual image V becomes difficult to see. The light shielding wall 71 a has a flat plate shape and is formed so as to hang obliquely from the top of the housing 71. An opening 71b through which the display light L is emitted is formed on the upper surface of the housing 71, and a translucent cover 72 is attached to the opening 71b. The translucent cover 72 is made of a transparent resin such as polycarbonate and has a curved shape.

  In the present embodiment, the projector 10, the plane mirror 21, and the transmissive screen 26 are fixed to a metal heat sink 31 having higher rigidity than the resin housing 41. There is little risk of errors in the position and angle of the mold screen 26. Moreover, in this embodiment, since the display apparatus 2 is divided into the 1st unit A and the 2nd unit B, an assembly | attachment is easy and manufacturing cost can be reduced.

  In addition, this invention is not limited to this embodiment, A various deformation | transformation is possible. For example, although the display element of the present embodiment is a DMD, it may be a liquid crystal display element.

10 Projector (light emitting display)
11B Blue light emitting diode (light emitting element)
11R Red light emitting diode (light emitting element)
11G Green light emitting diode (light emitting element)
14 DMD (Display element)
21 Plane mirror (reflective member)
26 Transmission screen (imaging member)
31 Heat sink (heat dissipation member)
51 Plane mirror (second reflecting member)
61 Concave mirror (second reflecting member)
71 Housing 71
A 1st unit B 2nd unit L Display light

Claims (3)

  A light-emitting display that emits display light, a reflective member that reflects the display light emitted from the light-emitting display, an imaging member that projects the display light reflected by the reflective member, and the light-emitting display And a heat radiating member for fixing the reflecting member and the imaging member. A light-emitting display that emits display light, a reflective member that reflects the display light emitted from the light-emitting display, an imaging member that projects the display light reflected by the reflective member, and the light-emitting display A first unit having a heat dissipation member for fixing the container, the reflecting member, and the imaging member;
A second unit comprising: a second reflecting member that reflects the display light imaged by the imaging member; and a housing that houses the second reflecting member;
A display device comprising:   The display device according to claim 1, wherein the light-emitting display device includes a display element and a light-emitting element that emits light to the display element.

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