JP2017171041A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that can be easily assembled, as well as suppress occurrence of image blur.SOLUTION: A display device emits an indication light L through an emission port to irradiate a translucent member to display an image indicated by the indication light L. The display device comprises: a display part 3 for emitting the indication light L; reflection parts (a first reflection part 41, a second reflection part 42) arranged on a light passage of the indication light L extending from the display part 3 to the emission port, for reflecting the indication light L; a control board for controlling operation of the display part 3; an upper case provided with the emission port; a lower case 71 to be assembled with the upper case; and a holding unit 5 arranged in between the upper case and the lower case 71, as well as fixed to the lower case 71, and holding the display part 3. The holding unit 5 holds, at the upper case side, not only the display part 3, but also at least a part of the reflection part, as well as the control board at the lower case 71 side.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a display device.

  Patent Document 1 discloses a display device that allows a user to visually recognize an image represented by display light as a virtual image by reflecting the display light from the display unit on a reflecting unit and then projecting the reflected light onto a translucent member such as a windshield of a vehicle. A so-called head-up display device is disclosed.

  The display device according to Patent Document 1 has a structure in which each member is disposed in a housing constituted by an upper case (lid 1 in the same document) and a lower case (first case 2 in the same document). Specifically, a reflection part (plane mirror, concave mirror) that reflects display light is assembled inside the lower case, and the control board is fixed to the outside of the lower case. Further, the display unit (liquid crystal display element or backlight) is assembled in a dedicated case (second case 5 in the same document) separate from the above case, and the dedicated case and the lower case are screwed together. It has a structure.

Japanese Patent Laid-Open No. 2016-9155

  In the structure according to Patent Document 1, since each of the display unit and the reflection unit is assembled on the basis of separate members, there is room for improvement in terms of improving the assembling property and improving the placement accuracy of components on the optical path of the display light. There is. If the arrangement accuracy of the parts on the optical path can be improved, it is possible to suppress the image from shifting from the assumed display position (occurrence of image blur).

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device that can be easily assembled and can suppress the occurrence of image blur.

In order to achieve the above object, a display device according to the present invention includes:
A display device that displays an image represented by the display light by emitting display light from an emission port and irradiating the translucent member,
A display unit for emitting the display light;
A reflection unit that is located on the optical path of the display light from the display unit to the exit, and reflects the display light;
A control board for controlling the operation of the display unit;
A first case provided with the injection port;
A second case combined with the first case;
A holding unit that is positioned between the first case and the second case and is fixed to the second case and holds the display unit;
The holding unit holds not only the display unit on the first case side but also at least a part of the reflection unit, and holds the control board on the second case side.
It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, the assembly | attachment is easy and the display apparatus which can suppress generation | occurrence | production of an image blur can be provided.

It is a schematic diagram for demonstrating the mounting aspect of the display apparatus which concerns on one Embodiment of this invention. It is a perspective view of a display apparatus. It is a perspective view of a display device except an upper case etc. It is a perspective view mainly showing a holding unit. It is a rear view of a holding unit. It is an exploded view for demonstrating the connection structure of a control board and a liquid crystal display element. It is a perspective view of the accommodating part vicinity of a holding unit. It is a top view of a lower case. It is a perspective view for demonstrating the connection structure of a control board and an external light sensor board | substrate. (A) And (b) is principal part sectional drawing of a housing | casing. It is a perspective view for demonstrating the detailed structure of an upper case. It is a perspective view for demonstrating the detailed structure of an upper case. It is an exploded view for demonstrating the detailed structure of the 1st holder holding a plane mirror. It is principal part sectional drawing for demonstrating the detailed structure of the 1st holder holding a plane mirror.

  A display device according to an embodiment of the present invention will be described with reference to the drawings.

  The display device 100 according to the present embodiment is provided so as to be embedded in the dashboard of the vehicle C as shown in FIG. As shown mainly in FIGS. 2 to 8, the display device 100 includes a display unit 3, a first reflection unit 41, a second reflection unit 42, a holding unit 5, a control board 6, and a housing 7. . The display unit 3 includes the backlight unit 1 and the liquid crystal display element 2, and the housing 7 includes a lower case 71 and an upper case 72.

  The display device 100 is configured as a head-up display device. The display device 100 emits the display light L from the display unit 3 from an emission port 72a (see FIG. 2) provided in the upper case 72, and projects the display light L onto the windshield S (front glass) of the vehicle C. Is displayed in front of the windshield. Thereby, the user U (mainly the driver | operator of the vehicle C) can visually recognize the image (virtual image V) showing various information, looking forward while driving. 2 and 3, the schematic optical path of the display light L is represented by a broken line arrow.

  In the following, in order to facilitate understanding of the configuration, the Y axis along the vertical direction viewed from the user U (corresponding to the vertical direction in FIG. 1), the X axis along the horizontal direction viewed from the user U, X and Y Each part will be described as appropriate using a Z-axis orthogonal to the axis. Also, the direction in which the arrows indicating the X, Y, and Z axes shown in the drawing are directed is the + (plus) direction of each axis, and the opposite direction is the-(minus) direction.

(Display unit 3)
The display unit 3 includes a backlight unit 1 and a liquid crystal display element 2. The display unit 3 is held in a storage unit 50 described later of the holding unit 5.

  As shown in FIG. 4, the backlight unit 1 includes a light source 10 and an optical element group (parallel light generation means 11, lens array 12, first lens 13, and second lens 14).

  The parallel light generating unit 11, the lens array 12, the first lens 13, and the second lens 14 are sequentially arranged on the optical path of the light emitted from the light source 10.

  The light source 10 emits light that transmits and illuminates the liquid crystal display element 2 (hereinafter referred to as illumination light). The light source 10 includes, for example, one or a plurality of LEDs (Light Emitting Diodes). The light source 10 is mounted on a circuit board 10a (see FIG. 4) fixed to an end portion (+ X side end portion) of an accommodating portion 50 described later. The circuit board 10a is formed by forming a circuit pattern on a base material made of aluminum, resin, or the like, and is electrically connected to the control board 6 shown in FIGS. 5 and 6 by wiring (not shown). .

  The parallel light generation means 11 receives illumination light from the light source 10 and emits it as parallel light that travels in parallel with the optical axis (generally along the X direction) of the light source 10. The parallel light generating means 11 is made of, for example, a condenser lens, and is fixed to the circuit board 10a as shown in FIGS. As the parallel light generating means 11, an optical element such as a collimating lens may be employed.

  The lens array 12 is composed of, for example, a fly-eye lens in which a plurality of single lenses are arranged vertically and horizontally. The illumination light collimated by the parallel light generating means 11 enters the lens array 12. Since the lens array 12 generates multiple images as many as the number of lenses constituting the lens array 12, an image of one light source 10 becomes a multiple image corresponding to the number of lenses of the lens array 12. Accordingly, the liquid crystal display element 2 can be illuminated with a uniform light intensity distribution even with a small number of light sources 10.

  The first lens 13 and the second lens 14 collect the illumination light transmitted through the lens array 12 so as to correspond to the display area of the liquid crystal display element 2 and efficiently irradiate the necessary range on the back surface of the liquid crystal display element 2. To do. The 1st lens 13 and the 2nd lens 14 consist of acrylic lenses, for example, and at least one of both is constituted as a toroidal lens. As a result, the illumination light that has passed through the first lens 13 and the second lens 14 is distributed in a rectangular shape, so that the shape of the display region of the liquid crystal display element 2 that is generally formed in a rectangular shape is generally used. In addition, the liquid crystal display element 2 is efficiently irradiated.

  The liquid crystal display element 2 is configured, for example, by providing polarizing plates on the front and back of a TFT (Thin Film Transistor) type liquid crystal panel. As the liquid crystal panel, various types such as a TN (Twisted Nematic) type, a VA (Vertical Alignment) type, a STN (Super-Twisted Nematic) type, and a ferroelectric type are applicable. The liquid crystal panel may be a passive drive type. A diffusion plate (not shown) is provided between the liquid crystal display element 2 and the second lens 14 to reduce illumination unevenness.

  As shown in FIG. 4, the liquid crystal display element 2 is provided with a cover 2 a that allows the display area to be viewed and protects the end portion. The liquid crystal display element 2 is fixed to an end portion (−X side end portion) of an accommodating portion 50 described later via the cover 2a. The cover 2a is fixed to the housing part 50 by hooks H1 provided in the housing part 50 or the like.

  The liquid crystal display element 2 displays an image by switching each pixel to one of transmission / non-transmission states under the control of the control substrate 6. Further, the control board 6 performs light emission control of the light source 10 via the circuit board 10a. When the liquid crystal display element 2 is transmitted and illuminated by the illumination light generated by the backlight unit 1, display light L representing an image is emitted. In this way, the display light L is emitted from the display unit 3 including the backlight unit 1 and the liquid crystal display element 2.

(First reflector 41, second reflector 42)
The first reflection unit 41 includes a plane mirror 41a and a first holder 41b that holds the plane mirror 41a. The flat mirror 41a is formed by depositing a metal such as aluminum on a base material made of resin, glass or the like to form a reflective surface. The plane mirror 41 a reflects the display light L emitted from the display unit 3 toward the second reflection unit 42. The plane mirror 41a is held by the holding unit 5 via the first holder 41b shown in FIG. The holding structure will be described later.

  The second reflecting portion 42 includes a concave mirror 42a and a second holder 42b that holds the concave mirror 42a. The concave mirror 42a is formed by depositing a metal such as aluminum on a base material made of resin, glass or the like to form a reflection surface. The display light L reflected by the concave mirror 42a through the display unit 3 and the plane mirror 41a is enlarged and projected onto the windshield S. Thereby, the virtual image V visually recognized by the user U becomes the magnitude | size to which the image currently displayed on the display part 3 was expanded. The holding structure by the second holder 42b will be described later.

(Holding unit 5)
The holding unit 5 holds the display unit 3, the reflection unit (the first reflection unit 41 and the second reflection unit 42), the control board 6, and a motor M described later. The holding unit 5 has a housing portion 50, a plate portion 51, and a stay portion 52, and is integrally formed of resin or the like.

  The housing unit 50 houses the lens array 12, the first lens 13, and the second lens 14. The accommodating part 50 holds the circuit board 10a on which the light source 10 is mounted and the parallel light generating means 11 is fixed, and the liquid crystal display element 2. That is, the storage unit 50 holds the display unit 3.

  The accommodating part 50 has wall parts 50a and 50b facing each other in the Z direction, and is formed in a box shape opened in the + Y direction. Moreover, the accommodating part 50 is opening toward each direction of + X and -X. For this reason, when it sees from a X direction, the accommodating part 50 makes concave shape.

  Grooves sandwiching both ends of each optical element (lens array 12, first lens 13, and second lens 14) are formed on the inner surfaces of the walls 50a and 50b. In addition, a positioning hole (not shown) into which a convex positioning portion provided in each optical element is inserted is formed in the bottom 50c (schematically shown in FIG. 6) of the accommodating portion 50. . With such a structure, each optical element is disposed in the accommodating portion 50. In addition, a lid 53 (see FIG. 3) that covers each optical element disposed is fixed to the upper portion of the housing portion 50. The lid 53 is fixed to the housing part 50 by a hook H <b> 2 provided in the housing part 50.

  The liquid crystal display element 2 is fixed to the end portion on the −X side of the housing portion 50 via the cover 2a. In addition, the circuit board 10 a is fixed to the + X side end of the housing part 50. As shown in FIG. 7, the circuit board 10 a is fixed by a hook H <b> 3 provided in the housing portion 50, a hook H <b> 4 provided in the lid 53, and the like.

  As shown mainly in FIG. 4, the plate portion 51 is formed so as to extend in the −X direction from the accommodating portion 50. The plate portion 51 is formed in a substantially trapezoidal shape in plan view (viewed from the Y direction). The end of the plate portion 51 that is inclined with respect to the X axis is a first holding portion 51 a that holds the first reflecting portion 41. For example, the first holding portion 51a is provided with a support portion 510 (see FIG. 14), which will be described later, so as to protrude in the + Y direction, and the first holder 41b is supported by the support portion 510, whereby the first reflection is performed. The part 41 is held. The holding / fixing structure of the first reflecting portion 41 will be described later.

  A stray light prevention wall 54 is provided between the accommodating portion 50 and the plate portion 51 of the holding unit 5. As shown in FIG. 2, the stray light prevention wall 54 is adapted to be combined with a light shielding wall 72 b formed on the upper case 72, and prevents stray light of the display light L emitted from the display unit 3. As shown in FIG. 2, the stray light prevention wall 54 can be viewed from the side of the housing portion 50 (side of the wall portion 50 b) while looking through the display area of the display portion 3 (liquid crystal display element 2). It is formed so as to surround the front.

  The stay portion 52 is formed so as to protrude in the + Z direction from one side surface of the housing portion 50. The stay portion 52 is formed with a second holding portion 52 a that holds the second reflecting portion 42. Specifically, the second holding portion 52a includes a bearing hole, and one of the pair of shaft portions 42c (see FIG. 12) provided on the second reflecting portion 42 (second holder 42b) (only one in FIG. 3). Is supported). The other of the pair of shaft portions 42c is supported by a shaft support portion 71a (see FIG. 8) provided in the lower case 71. The pair of shaft portions 42c are substantially along the X direction, and are rotatably supported.

  The stay unit 52 is provided with a motor holding unit 52b that holds a motor M (for example, a stepping motor) and a gear mechanism (consisting of a plurality of gears) that transmits the rotational power of the motor M to the second reflecting unit 42. It has been. The display device 100 is configured such that when the motor M rotates, the second reflecting section 42 rotates around a rotation axis (substantially parallel to the X axis) via a gear mechanism. Thereby, the inclination of the concave mirror 42a (that is, the display position of the virtual image V) can be adjusted.

  The control board 6 includes a printed circuit version on which a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a display control unit (graphic controller), various drivers, and the like are mounted. Control overall operation. That is, the control board 6 performs light emission control of the light source 10, display control of the liquid crystal display element 2, operation control of the motor M, and the like. The control board 6 is electrically connected to an outside light sensor board D (see FIG. 9) on which an outside light sensor (photo sensor or the like) is mounted, and according to detection information acquired from the outside light sensor, Dimming control of the display unit 3 (light source 10) is also performed. The external light sensor substrate D is fixed to the back surface of the upper case 72, for example, and detects the intensity of external light taken from a hole O1 (see FIG. 2) provided in the upper case 72. Note that at least a part of these controls may be performed by a control unit outside the display device 100.

  For example, the control board 6 acquires various types of vehicle information transmitted from an ECU (Electronic Control Unit) of the vehicle C through a communication line and causes the liquid crystal display element 2 to display an image indicating the vehicle information. The vehicle information may include not only information related to the own vehicle (vehicle C) (vehicle speed and the like) but also information around the vehicle C (information related to the preceding vehicle and obstacles, etc.).

  As shown in FIG. 5, the control board 6 is fixed to the back surface (the surface facing the −Y direction) of the housing portion 50. The housing portion 50 is provided with a plurality of hooks H5, and the control board 6 is held by these hooks H5 and the like. The control board 6 held in this way is arranged so as to cover the back surface of the plate part 51 of the accommodating part 50 as shown in FIG. Further, as shown in FIG. 6, the control board 6 is electrically connected to the liquid crystal display element 2 via an FPC (Flexible Printed Circuits) 6a. A hole O2 is provided in the bottom part 50c of the accommodating part 50, and the liquid crystal display element 2 and the control substrate 6 separated by the bottom part 50c can be connected by passing the FPC 6a through the hole O2. Yes.

(Case 7)
The housing 7 has the lower case 71 and the upper case 72 as described above.
As shown in FIG. 8, the bottom portion 710 of the lower case 71 is provided with a plurality of hooks H6 that protrude in the + Y direction. The holding unit 5 is fixed to the upper surface of the bottom portion 710 of the lower case 71 by being locked by these hooks H6. Further, the tip of the stay portion 52 of the holding unit 5 is fixed to the bottom portion 710 of the lower case 71 with a screw Sc. Of the side wall portions erected from the outer edge of the bottom portion 710 of the lower case 71, the shaft support portion 71a is provided on the inner surface (the surface facing the + X direction) of one side wall portion 711.

As described above, the upper case 72 has the injection port 72a and the light shielding wall 72b. The lower case 71 and the upper case 72 are combined by an engaging means such as a hook and a fixing means such as a screw to constitute a box-shaped casing 7.
From here, the detailed structure of each part other than having been described above will be described mainly with reference to FIG.

(Cord clamp function)
As shown in FIG. 9, the control board 6 is electrically connected to the external light sensor board D by the wiring W. The wiring W is sandwiched between the clamps C1 and C2, and does not play during vibration. The clamp C <b> 1 is provided in the first holding part 51 a in the holding unit 5. The clamp C <b> 2 is provided on the back surface (the surface facing the substantially −X direction) of the first reflecting portion 41. Specifically, the clamp C2 is provided on the back surface of the first holder 41b that holds the flat mirror 41a. Thus, by providing the clamps C1 and C2, it is possible to prevent the wiring W from being unintentionally pinched when the holding unit 5 is assembled to the lower case 71. For this reason, connection reliability can be maintained.

(Holding unit 5, lower case 71)
As shown in FIG. 10A, a hook H <b> 7 that is locked to the lower case 71 is provided in the vicinity of the motor holding portion 52 b of the holding unit 5. That is, the holding unit 5 is (i) locked to the hook H6 provided in the lower case 71, (ii) the stay portion 52 is fixed to the lower case 71 with the screw Sc (see FIG. 8), and (iii) ) The vicinity of the motor holding portion 52b is locked to the lower case by the hook H7. By doing in this way, rattling that may occur due to vibration of the motor M or the like can be suppressed.

  As shown in FIG. 10B, the lower case 71 is provided with a plurality of pins P <b> 1 that protrude in the + Y direction from the bottom 710. The control board 6 fixed to the back surface of the holding unit 5 as described above is configured to be supported by the lower case 71 by these pins P1. By doing so, it is possible to suppress rattling of the control board 6 and to ensure the strength of twisting due to the insertion / extraction of an external connector (not shown) with respect to the control board 6.

(Upper case 72)
As shown in FIG. 11, the upper case 72 is provided with a cover portion 72c that covers the upper end portion (+ Y side end portion) of the plane mirror 41a. By doing in this way, generation | occurrence | production of the unnecessary reflected light by the end surface of the plane mirror 41a being exposed can be prevented. Moreover, since the cover 72c is provided on the upper case 72, it is not necessary to provide a dedicated cover separately, which leads to a reduction in the number of parts.

  As shown in FIGS. 12 and 14, the upper case 72 is provided with a plurality (two in this embodiment) of first protrusions P2 protruding in the −Y direction on the back side of the cover 72c. The upper case 72 is provided with a plurality of (four in this embodiment) second protrusions P3 that protrude from the upper side and press the lid 53 that covers the housing part 50 when assembled in the -Y direction. ing. The functions of the first protrusion P2 and the second protrusion P3 will be described in detail later.

(First holder 41b for holding the flat mirror 41a)
In describing the detailed structure of the first holder 41b, as shown in FIG. 13, an α-β plane parallel to the reflecting surface of the plane mirror 41a (a plane formed by the α axis and β axis orthogonal to each other), and the method of the reflecting surface A description will be given using the γ-axis (axis orthogonal to the α-axis and β-axis) facing in the line direction.

  The first holder 41b formed of resin includes a first spring E1 having a restoring force in the α direction, a second spring E2 having a restoring force in the β direction, and a third spring E3 having a restoring force in the γ direction. Is provided. In this embodiment, the first spring E1, the second spring E2, and the third spring E3 are resin springs and are formed integrally with the first holder 41b. These springs may be separate from the first holder 41b or may be formed of metal.

  The plane mirror 41a is held by being inserted into the first holder 41b. The inserted plane mirror 41a is biased in the α direction by the first spring E1, biased in the β direction by the second spring E2, and biased in the γ direction by the third spring E3. Thus, the plane mirror 41a is held while being pressed by the first holder 41b from three directions orthogonal to each other. By doing in this way, the impact to the plane mirror 41a is absorbed, and rattling is prevented. As a result, occurrence of image blur can be suppressed.

  As shown in FIGS. 14 and 9, the first holder 41 b is provided with a supported portion 410 that protrudes from the back surface thereof. The supported portion 410 is supported by a support portion 510 provided in the holding unit 5. Note that the support portion 510 may be provided in the lower case 71. Further, the holding unit 5 and the lower case 71 may cooperate to support the first holder 41b.

  A leaf spring E4 is provided on the supported portion 410 of the first holder 41b. The leaf spring E4 has a restoring force mainly in the Y direction. The leaf spring 4 may be integrally formed with the first holder 41b by resin or the like, or may be a separate body.

  As shown in FIG. 14, the leaf spring E <b> 4 provided on the first holder 41 b is provided so as to correspond to the first protrusion P <b> 2 provided on the upper case 72. In this embodiment, two leaf springs E4 are provided corresponding to the two first protrusions P2. When the upper case 72 is assembled to the lower case 71, the first holder 41b is supported by the support portion 510 provided in the holding unit 5 while the leaf spring E4 is pressed in the -Y direction by the first protrusion P2. By doing in this way, the impact to the plane mirror 41a is absorbed, and rattling is prevented. As a result, occurrence of image blur can be suppressed.

  Each optical element (lens array 12, first lens 13, and second lens 14) accommodated in the accommodating portion 50 is also disposed while being pressed at least in the vertical direction (substantially Y direction) by a spring (not shown). The When the upper case 72 is assembled to the lower case 71, the lid 53 fixed to the housing portion 50 is also pressed by the second protrusion P <b> 3 provided on the upper case 72. Accordingly, each optical element is pressed in the −Y direction via the lid 53. The display device 100 suppresses the occurrence of image blur even with such a structure. Each optical element (lens array 12, first lens 13, and second lens 14) is pressed not only in the vertical direction (substantially Y direction) but also in the optical axis direction (substantially X direction) by a spring (not shown). It is preferable. Furthermore, it is preferable if it is pressed also in a substantially Z direction by a spring (not shown). That is, it is preferable that each optical element is accommodated in the accommodating portion 50 while being pressed from three directions orthogonal to each other.

(1) The display device 100 described above displays an image (virtual image V) represented by the display light L by emitting the display light L from the emission port 72a and irradiating the windshield S (an example of a translucent member). To do. The display device 100 includes a display unit 3 that emits display light L, and a reflection unit (first reflection unit 41, which is located on the optical path of the display light L from the display unit 3 to the emission port 72a and reflects the display light L. A second reflection unit 42), a control board 6 for controlling the operation of the display unit 3, an upper case 72 (an example of a first case) provided with an injection port 72a, and a lower case 71 (in combination with the upper case 72). An example of a second case) and a holding unit 5 that is positioned between the upper case 72 and the lower case 71 and is fixed to the lower case 71 and holds the display unit 3.
The holding unit 5 holds not only the display unit 3 but also at least a part of the reflecting unit on the upper case 72 side, and holds the control board 6 on the lower case 71 side.
As described above, since the display unit 3, at least a part of the reflection unit, and the control board 6 are configured to be held by the holding unit 5, each member can be disposed simply by fixing the holding unit 5 to the lower case 71. Easy to assemble. Further, since the display unit 3 and the reflection unit are fixed with the holding unit 5 as a reference, occurrence of image blur can be suppressed. In addition, since the control board 6 is provided on the back surface of the holding unit 5, the control board 6 is provided in a space for securing the optical path of the display light L without providing a dedicated antireflection wall for preventing reflection on the control board 6. Exposure can be prevented.

(2) Further, the holding unit 5 includes a housing unit 50 that houses at least a part of the display unit 3, and a plate unit 51 that extends along the emission direction of the display light L from the display unit 3. The plate portion 51 holds the first reflecting portion 41 at the tip portion and holds the control board 6 on the back side. According to such a configuration of the holding unit 5, it is possible to hold the first reflecting unit 41 and the control board 6 while securing the optical path of the display light L from the display unit 3 to the first reflecting unit 41. .

(3) In addition, the holding unit 5 includes a stray light prevention wall 54 that prevents stray light of the display light L emitted from the display unit 3 between the housing unit 50 and the plate unit 51.
(4) The holding unit 5 includes a stay portion 52 that protrudes to the side of the housing portion 50. The stay portion 52 holds the motor M that adjusts the inclination of the second reflecting portion 42, and also 2 Hold at least a part of the reflecting portion 42.
Thus, since each part is unitized, assembly is easy and the number of parts can be reduced.

(5) Moreover, the 1st reflection part 41 has the plane mirror 41a and the holder (1st holder 41b) holding the plane mirror 41a, and the plane mirror 41a is the elastic body (1st provided in the 1st holder 41b). The spring E1, the second spring E2, and the third spring E3) are held while being pressed in three directions orthogonal to each other.
Since it did in this way, generation | occurrence | production of an image blur can be suppressed as mentioned above.

(6) The holding unit 5 is engaged with the lower case 71 by at least engaging means (hook H6, see FIG. 8).
Since it did in this way, an assembly | attachment is easy. Also, fixing means such as screws can be reduced.

  In addition, this invention is not limited by the above embodiment and drawing. Changes (including deletion of constituent elements) can be added to the embodiments and the drawings as appropriate without departing from the scope of the present invention. An example of modification is shown below.

(Modification)
In the above, an example in which the backlight unit 1 that illuminates the liquid crystal display element 2 includes the light source 10 and the optical element group (parallel light generation means 11, lens array 12, first lens 13, and second lens 14) will be described. However, the function and the number of the optical elements constituting the optical element group are arbitrary depending on the design. The display unit 3 may be configured by a self-luminous organic EL (OLED: Organic Light-Emitting Diode) display or the like.

  The example in which the holding unit 5 holds the first reflecting part 41 and a part of the second reflecting part 42 (one shaft part 42c) has been described above. What is necessary is just to hold | maintain at least one part of each of the 2nd reflection part 42. FIG. For example, the holding unit 5 may hold the first reflecting portion 41 in cooperation with the lower case 71 or may hold both the pair of shaft portions 42 c of the second reflecting portion 42. The holding unit 5 may hold only one of the first reflecting portion 41 and the second reflecting portion 42. How the holding unit 5 holds the first reflecting portion 41 and the second reflecting portion 42 is arbitrary depending on the design.

  In the above, the control board 6 is fixed to the holding unit 5 by the hook H5 (see FIG. 5), the holding unit 5 is fixed to the lower case 71 by the hook H6 (see FIG. 8), the other hooks H1 to H4, Although the example which fixes each part by H7 was demonstrated, the number, arrangement | positioning, and shape of these hooks are arbitrary according to a design. Further, a fixing means such as a screw may be used instead of or together with the engaging means such as a hook. However, in particular, in the structure for fixing the holding unit 5 to the lower case 71, it is preferable to use a larger number of hooks H6 and reduce fixing means such as screws because the assembly becomes easier.

  Moreover, although the above description showed the example which makes the user U visually recognize the display image by reflecting the display light L with the windshield S of the vehicle C, it is not restricted to this. The display device 100 may be provided with a dedicated combiner (an example of a translucent member), and the display image may be visually recognized by reflecting the display light L with the combiner.

  In the above description, an example of a vehicle on which the display device 100 is mounted is the vehicle C. However, the present invention is not limited to this. The display device 100 may be mounted on another vehicle such as a motorcycle, a construction machine, an agricultural machine, a ship, an aircraft, or the like.

DESCRIPTION OF SYMBOLS 100 ... Display apparatus 1 ... Backlight unit 2 ... Liquid crystal display element 3 ... Display part 41 ... 1st reflection part 41a ... Plane mirror, 41b ... 1st holder, 410 ... Supported part, E1-E3 ... 1st-3rd spring 42 ... 2nd reflection part 42a ... Concave mirror, 42b ... 2nd holder, 42c ... Shaft part 5 ... Holding unit 50 ... Housing part, 50a, 50b ... Wall part, 50c ... Bottom part, O2 ... Hole 51 ... Plate part, 51a ... 1st holding part 52 ... stay part, 52a ... 2nd holding part, 52b ... motor holding part, M ... motor 53 ... lid 54 ... stray light prevention wall 6 ... control board, FPC ... 6a, D ... external light sensor board,
7 ... Case 71 ... Lower case (example of second case)
71a ... shaft support, 710 ... bottom, O2 ... hole 72 ... upper case (an example of a first case)
72a ... Ejection port, 72b ... Light shielding wall, O1 ... Hole, 72c ... Cover part P2 ... First projection part, P3 ... Second projection part L ... Display light, V ... Virtual image, U ... User

Claims (6)

A display device that displays an image represented by the display light by emitting display light from an emission port and irradiating the translucent member,
A display unit for emitting the display light;
A reflection unit that is located on the optical path of the display light from the display unit to the exit, and reflects the display light;
A control board for controlling the operation of the display unit;
A first case provided with the injection port;
A second case combined with the first case;
A holding unit that is positioned between the first case and the second case and is fixed to the second case and holds the display unit;
The holding unit holds not only the display unit on the first case side but also at least a part of the reflection unit, and holds the control board on the second case side.
A display device characterized by that. The holding unit includes a housing portion that houses at least a part of the display portion, and a plate portion that extends along an emission direction of the display light from the display portion,
The reflection unit includes a first reflection unit that reflects the display light from the display unit, and a second reflection unit that further reflects the display light reflected by the first reflection unit,
The plate portion holds the first reflecting portion at a tip portion thereof and holds the control board on the back side thereof.
The display device according to claim 1. The holding unit has a stray light prevention wall for preventing stray light of the display light emitted from the display unit between the storage unit and the plate unit.
The display device according to claim 2. The holding unit has a stay portion protruding to the side of the housing portion,
The stay portion holds a motor that adjusts the inclination of the second reflecting portion, and holds at least a part of the second reflecting portion.
The display device according to claim 2, wherein the display device is a display device. The first reflecting unit includes a plane mirror and a holder that holds the plane mirror,
The plane mirror is held while being pressed in three directions orthogonal to each other by an elastic body provided in the holder.
The display device according to claim 2, wherein the display device is a display device. The holding unit is engaged with the second case by at least engaging means,
The display device according to claim 1, wherein the display device is a display device.