Head-up display device

Abstract

To provide a head-up display device that can be compactly configured.SOLUTION: A head-up display device comprises: a display panel unit 84 that has a display panel 81 emitting display light L upon receiving illumination light; a display panel holder 20 that accommodates the display panel 81; and a light guide barrel member 90 that guides the display light L from the display panel 81. The display panel unit 84 includes a relay substrate 83, and a cable 82 that electrically connects the display panel 81 and the relay substrate 83 to each other. The light guide barrel member 90 includes a substrate accommodation part 92 that accommodates the relay substrate 83.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a head-up display device.

Background Art

[0002] The head-up display device described in Patent Document 1 includes a holder in which a first holding part for holding a liquid crystal panel and a second holding part for holding a display substrate are integrally formed. The second holding part protrudes forward from the lower end of the first holding part, and the cross-section of the holder is L-shaped.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration described in Patent Document 1 above, since the holder has the second holding part, it is difficult to configure the holder, and thus the head-up display device, in a compact manner.

[0005] The present disclosure has been made in view of the above actual situation, and an object thereof is to provide a head-up display device that can be configured in a compact manner.

Means for Solving the Problems

[0006] To achieve the above object, a head-up display device according to the present disclosure includes a display panel unit having a display panel that receives illumination light and emits display light, a display panel holder that houses the display panel, and a cylindrical member that guides the display light from the display panel. The display panel unit includes a circuit board and an electric wire that electrically connects between the display panel and the circuit board. The cylindrical member includes a substrate housing part that houses the circuit board. [Effects of the Invention]

[0007] According to this disclosure, it can be configured compactly. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram of a vehicle equipped with a head-up display device according to one embodiment of the present disclosure. [Figure 2] This is a schematic cross-sectional view of a head-up display device according to one embodiment of the present disclosure. [Figure 3] This is a schematic cross-sectional view of a display unit according to one embodiment of the present disclosure. [Figure 4] This is a perspective view of a display unit according to one embodiment of the present disclosure. [Figure 5] This is a perspective view of a display panel holder, a light guide tube member, and a holder cover according to one embodiment of the present disclosure. [Figure 6] This is an exploded perspective view of a display panel holder and a light guide tube member according to one embodiment of the present disclosure. [Figure 7] This is a perspective view of a display panel holder and a light guide tube member according to one embodiment of the present disclosure. [Figure 8] This is a perspective view of a display panel holder according to one embodiment of the present disclosure. [Figure 9] This is a perspective view of a display panel holder and holder cover according to one embodiment of the present disclosure. [Figure 10] This is a perspective view of a head-up display device with the lower cover removed, according to one embodiment of the present disclosure. [Figure 11] This is a schematic side view of a display panel holder according to a comparative example and a light guide tube member according to one embodiment of the present disclosure. [Modes for carrying out the invention]

[0009] One embodiment of the head-up display device relating to this disclosure will be described with reference to the drawings. As shown in Figure 1, the head-up display device 100 is installed in the dashboard of the vehicle 200. The head-up display device 100 emits display light L representing an image toward the windshield 201, which is an example of a projection target member of the vehicle 200. The display light L is reflected by the windshield 201 and reaches the viewer 1 (mainly the driver of the vehicle 200). As a result, the head-up display device 100 displays a virtual image V on the display surface A so as to be superimposed on the real scene seen through the windshield 201.

[0010] As shown in Figure 2, the head-up display device 100 comprises a display device 10 that emits display light L, a concave mirror 30, a housing 60, and a main control board 11.

[0011] The concave mirror 30 reflects the display light L from the display device 10, amplifying it as it is directed toward the windshield 201 (see Figure 1).

[0012] The housing 60 is made of a non-transparent resin material or a metal material and is a hollow, substantially rectangular parallelepiped. The housing 60 comprises a lower case portion 60a, an upper case portion 60b, and a lower cover 60c. The lower case section 60a is a box-shaped structure with a bottom that opens upwards. The lower case section 60a houses the concave mirror 30 and the display device 10.

[0013] As shown in Figure 2, the upper case portion 60b is formed as a lid that closes the opening of the lower case portion 60a. The upper case portion 60b has an opening formed at a position opposite the windshield 201 (see Figure 1). The upper case portion 60b is provided with a curved plate-shaped window portion 61 that closes this opening. The window portion 61 is made of a light-transmitting resin material such as acrylic through which the display light L passes.

[0014] The display device 10 includes an illumination device 70 that emits illumination light IL, and a display unit 80 that receives the illumination light IL and emits display light L. The lighting device 70 includes a plurality of light sources 75a, a light source substrate 75, a light adjustment member 71, a holder 74, and a heat sink 79. The plurality of light sources 75a are composed of LEDs (Light Emitting Diodes) and are arranged on the mounting surface of the light source substrate 75. The plurality of light sources 75a emit illumination light IL.

[0015] The light adjustment member 71 is composed of a plurality of lenses and has functions such as parallelizing the illumination light IL from the plurality of light sources 75a, expanding the illumination light IL according to the size of the display panel 81 described later, and reducing the luminance unevenness of the illumination light IL. The holder 74 is formed in a cylindrical shape so as to surround and hold the periphery of the light adjustment member 71 (the plurality of lenses). The heat sink 79 dissipates the heat generated from the light source substrate 75 to the outside. The heat sink 79 is formed in a range covering the back surface (the surface opposite to the mounting surface) of the light source substrate 75 and above the lighting device 70.

[0016] As shown in FIG. 3, the display unit 80 includes a display panel unit 84, a display panel holder 20, a light guide cylinder member 90 (cylinder member), a holder cover 85, optical elements 97, 98, 99, and double-sided tapes 35, 36. The display panel unit 84 includes a display panel 81, a cable 82, and a relay substrate 83. In the following description, the thickness direction of the display panel 81 is defined as the Z direction, and the directions along the light incident surface of the display panel 81 and perpendicular to each other are defined as the X direction and the Y direction. The X direction is along the vehicle width direction. The Y direction generally follows the height direction and, specifically, is inclined so as to face the vehicle front as it goes upward.

[0017] The optical element 99 is located on the side of the lighting device 70 of the display panel 81 (the right side in FIG. 3) and has a function of adjusting (diffusing or polarizing, etc.) the illumination light IL.

[0018] The display panel 81 is, for example, a TFT (Thin Film Transistor) liquid crystal display panel and emits display light L by receiving the illumination light IL that has passed through the optical element 99. Cable 82 electrically connects the display panel 81 and the relay board 83. Cable 82 is a flexible flat cable, a type of electric wire. One end of cable 82 is connected to the lower end of the display panel 81, and the other end of cable 82 is connected to the end of the relay board 83 closest to the display panel 81. Cable 82 is bent in a U-shape or V-shape when viewed from the X direction.

[0019] As shown in Figure 10, the relay board 83 is connected to the main control board 11 via a cable 13 separate from cable 82. The relay board 83 is a flexible printed circuit board (FPC) and is installed between the display panel 81 and the main control board 11. Cable 13 is a flexible flat cable. The main control board 11 is electrically connected to the relay board 83 via cable 13, and is also electrically connected to the light source board 75 via a cord wire 14, which is a type of electric wire. The main control board 11 outputs control signals to the display panel 81 via cable 13, the relay board 83, and cable 82, and outputs control signals to the light source 75a via the cord wire 14 and the light source board 75, for controlling the light source 75a.

[0020] As shown in Figure 3, the optical element 97 is a prism that transmits display light L from the display panel 81, and changes the direction of radiation of the display light L depending on the orientation of the light-emitting surface 97a. The optical element 97 is attached to the frame portion 21 of the display panel holder 20, which will be described later, by double-sided tape 97b, which is an adhesive material. The display panel 81 and optical element 99 are housed in the display panel holder 20 and held between the display panel holder 20 and the holder cover 85. The optical element 98 is a hot mirror that transmits visible light and reflects near-infrared light. As shown in Figure 4, the optical element 98 is located between the display panel holder 20 and the light guide tube member 90.

[0021] As shown in Figure 8, the display panel holder 20 comprises a frame portion 21, a side wall portion 22, a plurality of flange portions 23, and a plurality of locking protrusions 24a, 24b. The frame portion 21 is a rectangular frame plate that follows the outer periphery of the display panel 81. The frame portion 21 has an opening 21a through which illumination light IL passes. The frame portion 21 is formed to align with the X and Y directions.

[0022] The side wall portion 22 is erected on the outer edge of the frame portion 21 and is formed to follow three of the four sides of the display panel 81, excluding the one side to which the cable 82 is connected. The display panel 81 and optical elements 97, 99 (see Figure 3) are housed inside the side wall portion 22. The two locking projections 24a are located at the lower end of the frame 21 and are positioned at a distance from each other in the X direction. The two locking projections 24b are located at the upper end of the frame 21 and are positioned at a distance from each other in the X direction. In this example, there are multiple flange portions 23, two of which are located on the outer sides of the display panel holder 20 in the X direction. Each flange portion 23 is a rectangular plate shape that is long in the front-rear direction of the vehicle. Figure 10 shows the head-up display device 100 with the lower cover 60c removed. As shown in the figure, the flange portion 23 is fixed from below into the display device housing chamber 60a1 of the lower case portion 60a by screws 23B.

[0023] As shown in Figure 9, the holder cover 85 comprises a frame portion 86, a plurality of hook portions 87a, and a plurality of locking holes 87b. The frame portion 86 is a rectangular frame plate that follows the outer periphery of the display panel 81, etc. The frame portion 86 has an opening 86a through which illumination light IL passes. The frame portion 86 is formed to align with the X and Y directions. Each of the multiple hook portions 87a engages with a locking projection 24a. Two of the hook portions 87a are located at the lower end of the frame portion 86 and are formed in a U-shaped plate form that extends in a direction intersecting the frame portion 86. Each of the multiple locking holes 87b is locked (fitted) by a locking projection 24b. Two of the locking holes 87b are formed at the upper end corners of the frame portion 86.

[0024] As shown in Figures 5 and 6, the display panel holder 20 further comprises a light-shielding wall portion 26 and a plurality of positioning portions 25. The light-shielding wall portion 26 is located on the opposite side of the holder cover 85 of the display panel holder 20. The wall height H1 (see Figure 6) of the light-shielding wall portion 26 along the Z direction is inclined to increase as it approaches the substrate housing portion 92, which will be described later. As shown in Figure 3, the light-shielding wall portion 26 is located on the outer circumference side of the light-emitting surface 97a of the optical element 97 (prism) and extends in a direction along the display light L. The end of the light-shielding wall portion 26 closest to the light-emitting surface 97a is connected to the inner circumference end of the frame portion 21. The light-shielding wall portion 26 and the frame portion 21 form a roughly V shape when viewed from the X direction, as the light-shielding wall portion 26 extends in the Z direction and the frame portion 21 extends in the Y direction. The light-shielding wall portion 26 suppresses the reflection of components inside the display device 10 in the virtual image V. The optical element 98 is attached to the leading edge of the light-shielding wall portion 26 by double-sided tape 98a, as shown by the dashed line in Figure 4.

[0025] As shown in Figures 6 and 7, multiple positioning portions 25, two in this example, are formed as pins extending in the Z direction and fit into positioning portions 95 of the light guide tube member 90, which will be described later. This allows for positioning between the light guide tube member 90 and the display panel holder 20.

[0026] The light guide tube member 90 guides the display light L from the display panel 81 to the concave mirror 30. The light guide tube member 90 comprises a cylindrical portion 91, a substrate housing portion 92, and a plurality of positioning portions 95. The substrate housing portion 92 is integrally formed with the cylindrical portion 91 from a light-shielding resin or metal. The cylindrical portion 91 is a rectangular tube through which the display light L passes. The wall height H2 (see Figure 6) along the Z direction of the cylindrical portion 91 is inclined to increase as it approaches the substrate housing portion 92. The multiple positioning parts 95 are the parts into which the aforementioned positioning part 25 is fitted. The multiple positioning parts 95 are located at the upper end of the cylindrical part 91 and are provided at positions separated in the X direction.

[0027] The substrate housing section 92 houses the intermediate substrate 83 (see Figure 4). The substrate housing section 92 is located at the lower end of the cylindrical section 91 and is centered in the X direction of the cylindrical section 91. The substrate housing section 92 extends toward the holder cover 85 (see Figure 5) in the directions along the X and Z directions. The substrate housing section 92 and the display panel 81 are arranged to form a roughly V shape when viewed from the X direction. The angle between the substrate housing section 92 and the display panel 81 is formed to be approximately 40° to approximately 50°, preferably approximately 45°.

[0028] As shown in Figures 3 and 5, the substrate housing section 92 is located below the light-shielding wall section 26 and the frame section 21. The substrate housing section 92 comprises a plate section 92a and a side wall section 92b. The plate portion 92a is plate-shaped, oriented along the X and Z directions, and faces the relay substrate 83. The plate portion 92a is rectangular in shape. The plate portion 92a comprises a first surface 921 facing the relay substrate 83 and a second surface 922 opposite to the first surface 921, which faces the display panel holder 20.

[0029] Recesses 92c, 92d, and a through hole 92h are formed on the first surface 921 of the plate portion 92a. The recesses 92c and 92d are formed in a concave shape on the first surface 921 of the plate portion 92a. The recesses 92c and 92d are spaces for accommodating the double-sided tapes 35 and 36. The recesses 92c and 92d are each located in the center of the plate portion 92a in the X direction, forming a long rectangle in the Z direction, and are positioned side by side in the Z direction. The first end of the recess 92c extending in the Z direction reaches the edge of the plate portion 92a on the display panel 81 side (right side in Figure 3), and the second end of the recess 92c faces the first end of the recess 92d extending in the Z direction. The second end of the recess 92d is connected to the through hole 92h. The through hole 92h penetrates through to the thickness of the plate portion 92a so that the double-sided tape 36 (more precisely, its curved portion 36b) can pass through. The through-hole 92h is formed to be wider in the X direction than the recess 92d.

[0030] The side wall portion 92b is erected on the outer peripheral edge of the lower surface of the plate portion 92a and is formed corresponding to three of the four sides of the plate portion 92a, excluding the side on the display panel 81 side.

[0031] As shown in an enlarged view at the bottom of Figure 3, the double-sided tapes 35 and 36 hold the relay substrate 83 within the substrate housing 92 and also hold the substrate housing 92 in the display panel holder 20. The double-sided tapes 35 and 36 are elastic and flexible, formed in a strip shape, and have adhesive properties on both sides. The double-sided tapes 35 and 36 are bent into a U-shape so as to adhere to both sides of the plate portion 92a. The double-sided tapes 35 and 36 are the same specifications as the double-sided tapes 97b and 98a. Therefore, there is no need to prepare multiple shapes or types of double-sided tapes.

[0032] The double-sided tape 35 comprises a first adhesive portion 35a housed in a recess 92c, a curved portion 35b bent in a U-shape along the end of the plate portion 92a on the display panel 81 side, and a second adhesive portion 35c located on the second surface 922 of the plate portion 92a. The first adhesive portion 35a provides adhesive force between the plate portion 92a and the relay substrate 83, and the second adhesive portion 35c provides adhesive force between the plate portion 92a and the frame portion 21.

[0033] The double-sided tape 36 comprises a first adhesive portion 36a housed in the recess 92d, a curved portion 36b bent into a U-shape while passing through the through hole 92h, and a second adhesive portion 36c located on the second surface 922 of the plate portion 92a. The first adhesive portion 36a exerts adhesive force between the plate portion 92a and the relay substrate 83, and the curved portion 36b exerts adhesive force between the plate portion 92a and the optical element 98. The second adhesive portion 36c exerts adhesive force between the plate portion 92a and the light-shielding wall portion 26 (more precisely, the tip of the light-shielding wall portion 26). Vibration of the optical element 98 is suppressed when the lower end of the optical element 98 comes into contact with the double-sided tape 36.

[0034] Next, the assembly method for the display unit 80 will be described. This assembly work is performed by a worker, but it is not limited to this and may also be performed by a robot. The optical elements 97, 99 and the display panel 81 are housed in the display panel holder 20, and the holder cover 85 is attached to the display panel holder 20. Next, the optical element 98 is attached to the end face of the display panel holder 20 on the side of the light guide tube member 90. Furthermore, double-sided tapes 35 and 36 are attached along the recesses 92c and 92d of the substrate housing portion 92 of the light guide tube member 90, and the double-sided tapes 35 and 36 are wrapped around to the back side of the substrate housing portion 92. Then, the light guide tube member 90 is assembled to the display panel holder 20 so that the positioning portions 25 and 95 fit together. As a result, the back portions of the double-sided tapes 35 and 36 (second adhesive portions 35c, 36c and curved portion 36b) adhere to the display panel holder 20 and the optical element 99. Then, the cable 82 is bent to adhere the relay substrate 83 to the front portions of the double-sided tapes 35 and 36 (first adhesive portions 35a and 36a). As a result, the relay substrate 83 is held within the substrate housing portion 92. This completes the assembly of the display unit 80. The assembly order is not limited to the above and can be changed as needed.

[0035] Next, we will explain, in comparison with a comparative example (the display panel holder 120 in Figure 11), why the display unit 80 can be made compact by having the light guide tube member 90 have a substrate housing portion 92. The comparative example, the display panel holder 120, comprises a frame-shaped housing body 121 for housing the display panel and a substrate housing portion 192 for housing the relay substrate 183. The display panel holder 120 is formed by a mold (not shown). Therefore, due to the mold's removal direction, it is necessary to increase the angle α between the housing body 121 and the substrate housing portion 192 as viewed from the X direction, so that the substrate housing portion 192 does not overlap with the substrate housing portion 192 in the mold's removal direction. Thus, the display panel holder 120 according to the comparative example is up to H3 in height taller than the light guide tube member 90 of this embodiment. Therefore, the configuration of this embodiment can be made more compact by H3 in height compared to the configuration of the comparative example. In particular, the cylindrical portion 91 forms a roughly triangular shape when viewed from the X direction. The longest side 91H of this triangle intersects at point P1 with a virtual plane on which the plate-shaped substrate housing portion 92 rests. The longest side 91H is the side closest to the concave mirror 30 (see Figure 2). Therefore, the substrate housing portion 92 does not protrude beyond the longest side 91H, allowing the light guide cylinder member 90 to be constructed compactly.

[0036] (effect) According to the embodiment described above, the following effects are achieved. (1) The head-up display device 100 includes a display panel unit 84 having a display panel 81 that receives illumination light IL and emits display light L, a display panel holder 20 that houses the display panel 81, and a light guide tube member 90 (blind cover) that guides the display light L from the display panel 81. The display panel unit 84 includes a relay board 83 which is an example of a circuit board, and a cable 82 which is an example of an electric wire that electrically connects the display panel 81 and the relay board 83. The light guide tube member 90 includes a board housing section 92 that houses the relay board 83. With this configuration, the light guide tube member 90 has a substrate housing portion 92, which allows the display unit 80, and consequently the head-up display device 100, to be made compact, as described above.

[0037] (2) The substrate housing section 92 includes a plate portion 92a having a first surface 921 facing the relay substrate 83 and a second surface 922 opposite to the first surface 921 that faces the outer surface of the display panel holder 20. The head-up display device 100 includes double-sided tapes 35, 36 for holding the relay substrate 83 and the display panel holder 20 relative to the substrate housing section 92. The double-sided tapes 35, 36 include first adhesive portions 35a, 36a located between the first surface 921 and the relay substrate 83, second adhesive portions 35c, 36c located between the second surface 922 and the display panel holder 20, and curved portions 35b, 36b that curve to connect the first adhesive portions 35a, 36a and the second adhesive portions 35c, 36c. With this configuration, the relay substrate 83 is held in the substrate housing 92 by the first adhesive portions 35a and 36a of the double-sided tapes 35 and 36, while the substrate housing 92 is held in the display panel holder 20 by the second adhesive portions 35c and 36c, maintaining a clearance equal to the thickness of the double-sided tapes 35 and 36. This makes it possible to suppress interference between the substrate housing 92 and the display panel holder 20 even under vibration.

[0038] (3) The head-up display device 100 is held between the light guide tube member 90 and the display panel unit 84 and includes an optical element 98 that adjusts the display light L from the display panel 81. The double-sided tape 36 is formed to contact the optical element 98. With this configuration, the vibration of the optical element 98 can be suppressed by the double-sided tape 36.

[0039] (4) The display panel holder 20 is equipped with a light-shielding wall portion 26 that blocks external light from entering the display panel holder 20. With this configuration, the light-shielding wall 26 prevents components inside the display device 10 from being reflected in the virtual image V. Furthermore, a mold slide structure is required to form the light-shielding wall portion 26. For this reason, it was difficult to further form a substrate housing portion in the display panel holder 20 which has the light-shielding wall portion 26. With the above configuration, by forming the substrate housing portion 92 in the light guide cylinder member 90, it becomes possible to have both the light-shielding wall portion 26 and the substrate housing portion 92 in the light guide cylinder member 90 and the display panel holder 20 as a whole.

[0040] (5) The substrate housing section 92 is at an angle of approximately 40° to approximately 50°, preferably approximately 45°, with respect to the display panel 81. With this configuration, compared to Patent Document 1, the angle between the substrate housing 92 and the display panel 81 can be reduced, making the head-up display device 100 more compact.

[0041] This disclosure is not limited to the embodiments and drawings described above. Modifications (including the deletion of components) can be made as appropriate, provided they do not alter the essence of this disclosure. An example of such a modification is described below.

[0042] (modified version) In the above embodiment, the display unit 80 was equipped with optical elements 97, 98, and 99, but one or more of the optical elements 97, 98, and 99 can be omitted. Furthermore, new optical elements may be provided. Furthermore, the functions, shapes, and arrangements of the optical elements 97, 98, and 99 can be changed as appropriate.

[0043] In the above embodiment, the head-up display device 100 projected the display light L onto a windshield 201, which is an example of a projection target member. However, the projection target member is not limited to this and may be a dedicated combiner.

[0044] In the above embodiment, the head-up display device 100 may include a folding mirror that reflects the display light L from the display device 10 toward the concave mirror 30. Furthermore, in the above embodiment, the head-up display device 100 may also include a mirror drive mechanism that rotates the concave mirror 30 around a rotation axis along the vehicle width direction.

[0045] In the above embodiment, the double-sided tapes 35 and 36 were formed to extend to both sides (first surface 921 and second surface 922) of the plate portion 92a of the substrate housing portion 92, respectively. However, different double-sided tapes may be used in the areas along the first surface 921 and the areas along the second surface 922. The two double-sided tapes 35 and 36 may be formed as a single, connected double-sided tape. Alternatively, adhesive may be used instead of double-sided tapes 35, 36, 97b, and 98a. In the above embodiment, the double-sided tape 36 was in contact with the optical element 98, but it is not necessary for it to be in contact with the optical element 98. In the above embodiment, at least one of the recesses 92c and 92d may be omitted. [Explanation of Symbols]

[0046] 1. Sighted person 10 Display device 11 Main control board 13,82 Cable 14 wires 20,120 Display Panel Holder 21,86 Frame section 21a,86a opening 22,92b Side wall part 23 Flange section 23B Screw 24a, 24b Locking protrusion 25,95 Positioning section 26 Light-shielding wall section 30 Concave Mirrors 35, 36, 97b, 98a Double-sided tape 35a,36a 1st adhesive part 35b, 36b Curved section 35c,36c 2nd adhesive part 60 cabinets 60a Lower case section 60b Upper case section 60a1 Display device housing room 60c bottom cover 61 Window section 70 Lighting devices 71 Light adjustment member 74 Holder 75 Light source substrate 75a light source 79 Heatsink 80 Display Units 81 Display Panel 83,183 relay boards 84 Display Panel Unit 85 Holder Cover 87a Hook part 87b Locking hole 97, 98, 99 Optical elements 90 Light guide tube member 91 Cylinder part 91H Long side 92,192 Circuit board housing section 92a plate part 92c, 92d recess 92h through hole 921 Page 1 922 2nd page 97a Light exit surface 100 Head-Up Display Devices 121 Main housing section 200 vehicles 201 Windshield α angle A Display surface L display light P1 intersection V Illusion IL illumination light

Claims

1. A display panel unit having a display panel that receives illumination light and emits display light, A display panel holder that houses the aforementioned display panel, The system includes a cylindrical member that guides the display light from the display panel, The aforementioned display panel unit is Circuit board and The system includes an electric wire that electrically connects the display panel and the circuit board, The cylindrical member includes a circuit board housing portion for housing the circuit board. Head-up display device.

2. The substrate housing portion comprises a plate portion having a first surface facing the circuit board and a second surface opposite to the first surface that faces the outer surface of the display panel holder. The head-up display device is equipped with double-sided tape to hold the circuit board and the display panel holder relative to the substrate housing section. The double-sided tape mentioned above is A first adhesive portion located between the first surface and the circuit board, A second adhesive portion located between the second surface and the display panel holder, It comprises a curved portion that curves to connect the first adhesive portion and the second adhesive portion, The head-up display device according to claim 1.

3. The head-up display device includes an optical element that adjusts the display light from the display panel, The double-sided tape is formed to contact the optical element, The head-up display device according to claim 2.

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