KR20180035372A - Head up display apparatus - Google Patents

Abstract

The present invention relates to a head up display device having a structure capable of improving uniformity of an image in a display part. According to an embodiment of the present invention, the head up display device comprises: a light source part; a first light transmitting member located so as to face the light source part in an optical axis direction; a second light transmitting member located so as to face the first light transmitting member in the optical axis direction; the display part which is provided in a plate shape, is located so as to face the second light transmitting member in the optical axis direction, and receives light passing through the second light transmitting member; and a light diffusing member located above or below the second light transmitting member. The second light transmitting member includes a light transmitting part which is formed in a curved shape having an upper surface upwardly convex and a lower surface downwardly convex. The light diffusing member is located on the upper surface or the lower surface of the light transmitting part, and can have a curvature corresponding to a curvature of the upper surface or the lower surface of the light transmitting part.

Description

[0001] The present invention relates to a head up display apparatus,

Embodiments relate to a head-up display device having a structure capable of improving the uniformity of an image on a display portion.

The contents described in this section merely provide background information on the embodiment and do not constitute the prior art.

The Head Up Display (HUD) is known to have originated from the aircraft to allow pilots to look ahead and to see various specifications while looking down at the front without looking at the instrument panel.

The head-up display is particularly mounted on a vehicle in order to enable the passenger of the vehicle including the driver to easily grasp the state of the vehicle and the surroundings of the vehicle so as to secure the passenger and prevent a traffic accident, Related head-up display technologies are constantly being developed.

The head-up display device can display, for example, the front window of the vehicle, that is, the visible area of the passenger, the specifications of the vehicle necessary for driving the windshield, and information about the vehicle and the surroundings of the vehicle.

Since the head-up display device provides such information in the visible region of the passenger, the passenger can concentrate primarily on the road traffic situation, and the driver can reduce the number of times the driver watches the road and the traffic situation alternately.

Therefore, the head-up display device can alleviate the fatigue of the passenger of the vehicle including the driver, and contributes greatly to the safety of running of the vehicle.

Embodiments relate to a head-up display device having a structure capable of improving the uniformity of an image on a display portion.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

One embodiment of the head-up display device comprises: a light source unit; A first light transmitting member disposed so as to face the light source unit in the optical axis direction; A second light transmitting member disposed to face the first light transmitting member in the direction of the optical axis; A display unit provided in a plate shape and arranged to face the second light transmitting member in the direction of the optical axis and to which light passing through the second light transmitting member is incident; And a light diffusing member disposed on an upper portion or a lower portion of the second light transmitting member, wherein the second light transmitting member includes a light transmitting portion having an upwardly convex shape and a downward convexly curved shape, The light diffusion member may be disposed on the upper surface or the lower surface of the transparent portion and may have a curvature corresponding to the curvature of the upper surface or the lower surface of the transparent portion.

The light-diffusing member may be provided in a film shape, and may be arranged in a curved shape convex downward or convex upward.

The first light transmitting member may include a first flange protruding downward to separate the light source unit and the first light transmitting member in the optical axis direction.

The first light transmitting member may include a convex lens portion through which light incident from the light source passes.

The first light transmitting member may have a second flange protruding upward to separate the first light transmitting member and the second light transmitting member in the optical axis direction.

The second light transmitting member may have a third flange protruding downward and formed to correspond to the second flange and spacing the first light transmitting member and the second light transmitting member in the optical axis direction .

A first projection may be formed on an upper surface of the second flange, and a first recess may be formed in a lower surface of the third flange at a position corresponding to the first projection to receive the first projection.

A first projection may be formed on a lower surface of the third flange, and a first recess may be formed on an upper surface of the second flange to receive the first projection at a position corresponding to the first projection.

One embodiment of the head-up display device may further include a first heat-dissipating unit coupled to the light source unit and including a plurality of first radiating fins.

One embodiment of the head-up display device comprises: a casing accommodating the first light transmitting member and the second light transmitting member; And a holder for coupling the display unit to the casing.

The casing may include a second heat-radiating portion formed on a side portion and including a second radiating fin.

Wherein the holder includes: a first mounting portion for pressing the display portion to mount the holder to the casing; And a second mounting portion bent from the first mounting portion and engaged with the casing so that the holder is mounted on the casing.

The casing may include a hook protruding from the side portion, and the second mounting portion may include a second through hole into which the hook is inserted.

The light diffusing member may be disposed between the first light transmitting member and the second light transmitting member.

The light diffusing member may be disposed between the second light transmitting member and the display unit.

In the embodiment, since the light diffusion member is provided in a curved shape having a curvature corresponding to the curvature of the upper surface or the lower surface of the transparent portion, uniformity of light passing through the transparent portion and reaching the image panel can be improved.

1 is a side view showing a head-up display device according to an embodiment.
2 is a view for explaining a light diffusion member arrangement structure of an embodiment.
3 is a view for explaining a light diffusion member arrangement structure of another embodiment.
4 is a bottom perspective view showing the first light transmitting member of one embodiment.
FIG. 5 is a perspective view of the first light transmitting member of FIG. 4 viewed from above.
6 is a bottom perspective view showing a second light transmitting member of one embodiment.
FIG. 7 is a perspective view showing a state where the first heat-radiating portion, the casing and the holder of FIG. 1 are combined.
Fig. 8 is a side view of Fig. 7. Fig.
9 is a perspective view showing a holder of an embodiment.
10 is a rear perspective view of Fig.
11 is a photograph of an image displayed on a video panel in a head-up display device without a light diffusion member.
Fig. 12 is a photograph of an image displayed on a video panel in a head-up display device having a planar light diffusing member instead of a curved light diffusing member in the structure of Fig. 2;
13 is a photograph of an image displayed on a video panel in the head-up display device of the embodiment having the curved light diffusing member of Fig.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments are to be considered in all aspects as illustrative and not restrictive, and the invention is not limited thereto. It is to be understood, however, that the embodiments are not intended to be limited to the particular forms disclosed, but are to include all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments.

The terms "first "," second ", and the like can be used to describe various components, but the components should not be limited by the terms. The terms are used for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the constitution and operation of the embodiment are only intended to illustrate the embodiments and do not limit the scope of the embodiments.

In the description of the embodiments, when it is described as being formed on the "upper" or "on or under" of each element, the upper or lower (on or under Quot; includes both that the two elements are in direct contact with each other or that one or more other elements are indirectly formed between the two elements. Also, when expressed as "on" or "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

It is also to be understood that the terms "top / top / top" and "bottom / bottom / bottom", as used below, do not necessarily imply nor imply any physical or logical relationship or order between such entities or elements, And may be used to distinguish one entity or element from another entity or element.

Further, in the drawings, an orthogonal coordinate system (x, y, z) can be used. In the drawing, the x axis and y axis mean a plane perpendicular to the optical axis. For convenience, the optical axis direction (z axis direction) can be referred to as a first direction, the x axis direction as a second direction, and the y axis direction as a third direction .

1 is a side view showing a head-up display device according to an embodiment. The head-up display device of the embodiment may include a light source 100, a first light transmitting member 200, a second light transmitting member 300, a display unit 400, and a light diffusing member 500.

In Fig. 1, for the sake of clarity, illustration of the light diffusing member 500 is omitted. The light diffusing member 500 may be disposed above or below the second light transmitting member 300. The light diffusing member 500 will be specifically described below with reference to FIGS. 2 and 3. FIG.

The light emitted from the light source unit 100 passes through the first light transmitting member 200 and the second light transmitting member 300 and enters the display unit 400 can do.

At this time, the image displayed on the display unit 400 is reflected on the wind shield of the vehicle by the light emitted from the light source unit 100, and the passenger of the vehicle including the driver views the image on the windshield .

The light source unit 100 may include a light emitting device 110 for emitting light. It is appropriate to use the light emitting element 110 having a large brightness and a small energy consumption. As the light emitting device 110, for example, a light emitting diode (LED) may be used.

The light source unit 100 may be fabricated from, for example, a printed circuit board. Therefore, the light source unit 100 may include at least one light emitting device 110 on a printed circuit board, and active or passive devices, circuit wiring, and the like necessary for supplying electric power to the light emitting device 110. [

The display unit 400 is arranged to face the second light transmitting member 300 in the direction of the optical axis, and light passing through the second light transmitting member 300 can be incident thereon. The display unit 400 may include an image panel 410 on which an image is reproduced.

In this case, the image panel 410 may be implemented as an LCD (liquid crystal display), a PDP (plasma display panel), or an OLED (organic light emitting diode).

In the display unit 400, a video image can be reproduced. In order that the video image is projected on the windshield of the vehicle and the passenger can see clearly with the naked eye, additional projection light is required.

At this time, the light emitted from the light source unit 100 may serve as the projection light. Accordingly, the image displayed on the display unit 400 is projected on the windshield of the vehicle by the light emitted from the light source unit 100, and the passenger of the vehicle can see the image projected on the windshield.

When it is necessary to adjust the projection angle of the image projected from the display unit 400, for example, a prism, a mirror, or the like may be disposed at a proper position between the display unit 400 and the windshield, The angle can be adjusted.

The first light transmitting member 200 is arranged to face the light source unit 100 in the direction of the optical axis and the light emitted from the light source unit 100 can pass through the first light transmitting member 200. At this time, the first light transmitting member 200 may diffuse the light incident from the light source unit 100 to a plane perpendicular to the optical axis direction.

The area of the light emitted from the light emitting device 110 may be smaller than the area of the image panel 410. Accordingly, the first light transmitting member 200 can diffuse the light emitted from the light emitting device 110.

For this purpose, the first light transmitting member 200 may include a convex lens portion 230. The convex lens part 230 can pass the light incident from the light source part 100. [ That is, light incident from the light emitting element 110 to the first light transmitting member 200 may be condensed by the convex lens unit 230.

Accordingly, the convex lens part 230 may be disposed at a position corresponding to the optical axis direction at a position where the light emitting device 110 is disposed. The light is refracted by the convex lenses while the light passes through the convex lens part 230, and the light can be diffused.

The second light transmitting member 300 may be arranged to face the first light transmitting member 200 in the optical axis direction. The second light transmitting member 300 can pass the light that has passed through the first light transmitting member 200.

Meanwhile, the light passing through the first light transmitting member 200 may pass through the second light transmitting member 300 and enter the image panel of the display unit 400.

The second light-transmitting member 300 may make the incident light have a shape corresponding to the shape and the area of the image panel 410 and may be formed on a plane parallel to the display unit 400, To be distributed.

In order to achieve the above object, the second light transmitting member 300 may include a transparent portion 320 through which light passes, the upper surface of which is convex upward, the lower surface thereof is curved downwardly convexly, and the light passes through.

Due to the curved shape of the transparent portion 320, the light passing through the transparent portion 320 has a uniform brightness on a plane parallel to the display portion 400, and the shape and the area of the image panel 410 As shown in FIG.

For example, the light projecting unit 320 may adjust the angle of the incident light with respect to the optical axis direction to produce light having a shape and area corresponding to the image panel 410. Accordingly, in order to adjust the angle of the incident light with respect to the optical axis direction, the transparent portion 320 may be formed in a curved surface shape whose upper surface is convex upward in the optical axis direction and convex downward in the optical axis direction.

2 is a view for explaining the arrangement structure of the light diffusion member 500 of one embodiment. 2, the light diffusion member 500 is disposed between the first light transmission member 200 and the second light transmission member 300, and may be formed in a film shape.

The light emitted from the first light transmitting member 200 may be incident on the light diffusing member 500 through the second light transmitting member 300.

The light diffusion member 500 may diffuse the light emitted from the first light transmitting member 200 on a plane perpendicular to the optical axis, and may uniformize the brightness of the light. When the light emitted from the first light transmitting member 200 is viewed in a plane perpendicular to the optical axis, the brightness may be unevenly distributed on the plane.

For example, the brightness of the light is large at a position corresponding to the convex lens part 230 disposed on the first light transmitting member 200 on the plane, but the brightness of the light can be decreased as the distance from the convex lens part 230 is increased.

In this case, the light diffusion member 500 can uniformize the light intensity on the plane by lowering the light transmittance at the position corresponding to the convex lens unit 230 and increasing the light transmittance at other positions.

2, the light diffusing member 500 of the embodiment may be provided in a curved shape having a curvature corresponding to the curvature of the lower surface of the transparent portion 320. As shown in FIG.

When the light diffusing member 500 is provided in a planar shape, the distance between the surfaces of the light transmitting unit 320 and the light diffusion member 500 facing each other may be varied due to the curvature of the light transmitting unit 320 . That is, when the light diffusion member 500 is a planar type, the distance in the optical axis direction between the light diffusion member 500 and the center of the light transmission portion 320 is the shortest, ) May be the longest.

In the case of using the planar light diffusing member, the light diffusion effect by the light diffusion member 500 may be deteriorated due to the difference in the separation distance. For example, light passing through the light diffusion member 500 and the light projecting unit 320 may be focused at the center of the light projecting unit 320 having the shortest distance due to the difference in the separation distance.

Accordingly, in the above case, the light uniformity differs between the central portion and the edge of the transparent portion 320, and the image projected from the image panel due to such uneven light may be distorted and the image quality may be deteriorated.

In order to solve the above problem, the curved light diffusing member 500 having the curvature corresponding to the curvature of the lower surface of the transparent portion 320 may be provided. Therefore, as shown in FIG. 2, the light diffusion member 500 may be arranged in a curved convex shape downward to correspond to the lower surface of the transparent portion 320 which is convex downward.

When the curved light diffusing member 500 of the embodiment is disposed, the distance between the surfaces of the transparent portion 320 and the light diffusion member 500 facing each other is smaller than the distance between the transparent portion 320 and the entire light diffusion member 500 Lt; / RTI >

Therefore, the light is prevented from concentrating at the central portion of the transparent portion 320 due to the difference in the spacing distance, and the light is uniformly dispersed throughout the transparent portion 320, passes through the transparent portion 320, It is possible to improve the uniformity of the light.

3 is a view for explaining the arrangement structure of the light diffusion member 500 of another embodiment. 3, the light diffusion member 500 is disposed between the second light transmitting member 300 and the display unit 400, and may be provided in a film form.

At this time, the second light transmitting member 300 may be formed in a curved shape whose upper surface is convex upward and the lower surface is convex downward. Accordingly, the light diffusion member 500 may be arranged in a curved convex shape so as to correspond to the upper surface of the transparent portion 320 which is convex upward.

3, the distance between the transparent portion 320 and the surface of the light diffusion member 500 facing each other is larger than the distance between the transparent portion 320 and the light diffusion member 500, It can be kept constant throughout.

Therefore, the light is prevented from concentrating at the central portion of the transparent portion 320 due to the difference in the spacing distance, and the light is uniformly dispersed throughout the transparent portion 320, passes through the transparent portion 320, It is possible to improve the uniformity of the light.

4 is a bottom perspective view showing the first light transmitting member 200 of one embodiment. 5 is a perspective view of the first light transmitting member 200 of FIG. 4 viewed from above. As shown in FIGS. 4 and 5, the first light transmitting member 200 may include a first flange 210 and a second flange 220.

The first flange 210 may protrude downward from a lower surface of the first light transmitting member 200 and may separate the light transmitting member 100 and the first light transmitting member 200 in a first direction can do.

The shape of the light passing through the first light transmitting member 200 and the brightness distribution of the plane light perpendicular to the first direction, that is, the light distribution along the first direction, Optical uniformity, and other characteristics of the light.

Therefore, in the embodiment, the first flange 210 is used to adjust the distance between the light source unit 100 and the first light transmitting member 200 in the first direction to obtain the optimum light shape, light uniformity, and the like have.

That is, the length of the first flange 210 in the first direction may be appropriately adjusted so that the shape of the light passing through the first light transmitting member 200, the light uniformity, 1 light-transmitting member 200 can be set in the first direction.

The length of the first flange 210 in the first direction may vary depending on the size and specific structure of the head-up display device. Accordingly, the first direction length of the first flange 210 can be variously set according to each head-up display device having various sizes and structures.

Also, the number, position, and shape of the first flanges 210 can be variously selected according to the size and specific structure of the head-up display device.

The second flange 220 may be formed to protrude upward from the upper surface of the first light transmitting member 200 and may be configured to project the first light transmitting member 200 and the second light transmitting member 300 in the first direction As shown in FIG.

The shape of the light passing through the second light transmitting member 300, the light uniformity, and other characteristics of light may vary depending on the first directional distance between the first light transmitting member 200 and the second light transmitting member 300 .

Therefore, in the embodiment, the distance between the first light transmitting member 200 and the second light transmitting member 300 in the first direction is adjusted by using the second flange 220 so that the optimum light shape, And so on.

That is, the length of the second flange 220 may be appropriately adjusted so that the shape of the light passing through the second light transmitting member 300, the light uniformity, ) And the second light-transmitting member 300 in the first direction.

The length of the second flange 220 in the first direction may vary depending on the size and specific structure of the head-up display device. Therefore, the first direction length of the second flange 220 can be variously set according to each head-up display device having various sizes and structures.

Also, the number, position and shape of the second flanges 220 can be variously selected according to the size and specific structure of the head-up display device.

6 is a bottom perspective view showing the second light transmitting member 300 of one embodiment. As shown in FIG. 6, the second light transmitting member 300 may include a third flange 310.

The third flange 310 may be formed on the side surface of the transparent portion 320 and protrude downward from the second light transmitting member 300 and may be formed to correspond to the second flange 220. The third flange 310 may serve to separate the first light transmitting member 200 and the second light transmitting member 300 in the first direction similarly to the second flange 220 . Hereinafter, the description of the third flange 310 overlapped with the second flange 220 will be omitted.

The shape of the light passing through the second light transmitting member 300 can be optimized by appropriately adjusting the length of the second flange 220 and the third flange 310 in the first direction, 1 distance between the first light transmitting member 200 and the second light transmitting member 300 in the first direction.

The lengths of the first flange 210, the second flange 220 and the third flange 310 are controlled so that the first light transmitting member 200 and the second flange 310 are irradiated from the light source unit 100, It is possible to optimize the shape, the light uniformity, and the like of the light passing through the two light-transmitting members 300.

Meanwhile, the first light transmitting member 200, the light diffusing member 500, and the second light transmitting member 300 may be formed of a light transmitting material. In addition, the image panel 410 may be formed of a light transmitting material and a structure through which the light passing through the second light transmitting member 300 can pass.

5 and 6, the first light transmitting member 200 includes a first protrusion 221 and the second light transmitting member 300 includes a first recess 311 can do.

The first protrusion 221 is formed on the upper surface of the second flange 220 and the first protrusion 221 is formed on the lower surface of the third flange 310 at a position corresponding to the first protrusion 221. [ May be formed in the first recess 311.

It is appropriate that the first light transmitting member 200 and the second light transmitting member 300 are disposed at positions designed to be mutually on a plane perpendicular to the first direction, that is, on the xy plane. If the first light transmitting member 200 and the second light transmitting member 300 are separated from the designed range on the xy plane beyond the allowable range, the shape of the light passing through the second light transmitting member 300, Uniformity and the like may be different from predetermined ones, which may eventually degrade the image quality of the image projected onto the windshield of the vehicle.

The first protrusion 221 is inserted into the first recessed groove 311 so that the first and second light transmitting members 200 and 300 are positioned at a designed position on the xy plane And it is possible to prevent departure from exceeding the allowable range at the designed position.

The first protrusions 221 may be provided at appropriate positions on the upper surface of the second flange 220. The first recesses 311 may be provided on the bottom surface of the third flange 310 so as to be disposed at positions corresponding to the first protrusions 221 in the first direction with the same number of the first protrusions 221 have.

In another embodiment, the first protrusions 221 and the first depressed grooves 311 may be provided in a manner that the positions in the first direction are exchanged with each other. The first protrusion 221 is formed on the lower surface of the third flange 310 and the first protrusion 221 is formed on the upper surface of the second flange 220 at a position corresponding to the first protrusion 221. [ May be formed in the first recess 311.

FIG. 7 is a perspective view illustrating a state in which the first heat dissipation unit 600, the casing 700, and the holder 800 of FIG. 1 are combined. Fig. 8 is a side view of Fig. 7. Fig. The head-up display apparatus of the embodiment may further include a first heat-dissipating unit 600, a casing 700, and a holder 800.

The first heat dissipation unit 600 may be disposed below the light source unit 100 in combination with the light source unit 100 and may include a plurality of first heat dissipation fins 610. The first heat dissipation unit 600 may be provided to cool the heat generated in the light source unit 100.

This is because it is necessary to prevent the light source unit 100 from being overheated due to the heat generated during the irradiation of light in the light source unit 100.

The first radiating fins 610 protrude downward from the first radiating part 600 and may be provided in plural. The first radiating fins 610 may effectively transmit heat transferred from the light source 100 to the first radiating part 600 to the outside.

The first heat-dissipating unit 600 may be formed of a material having a good heat conductivity and a good workability in order to realize a complicated shape. Accordingly, it is preferable that the first heat-dissipating unit 600 is formed of a metal material. For example, the first heat dissipation unit 600 may be made of copper, copper alloy, aluminum, aluminum alloy, or the like, which is excellent in thermal conductivity and processability.

The casing 700 may have a hollow shape to receive the first light transmitting member 200, the light diffusing member 500 and the second light transmitting member 300, Gt; 710 < / RTI >

The second heat dissipating unit 710 is formed on the side of the casing 700 and discharges the heat generated in the casing 700 to the outside so that the first light transmitting member 200 ), The light diffusion member 500 and the second light transmitting member 300 can be prevented from being overheated.

The second heat dissipating unit 710 may include a second heat dissipating fin 711. As shown in FIG. 6, the second radiating fin 711 may include a protruded grid, for example, in which a bar and a vertical bar intersect with each other, and a protrusion formed at an intersection of the grid .

However, the second radiating fins 711 are not limited thereto, but may be configured in any form as long as they are capable of effective heat transfer to the outside.

The second heat-radiating fins 711 may serve to effectively transfer heat from the casing 700 to the outside. Like the first heat-dissipating unit 600, copper, copper alloy, aluminum, aluminum Alloy or the like.

9 is a perspective view showing a holder 800 of one embodiment. 10 is a rear perspective view of Fig. As shown in Fig. 9, the head-up display device may further include a holder 800. Fig.

The holder 800 is detachably attached to the casing 700 and is capable of coupling the display unit 400 to the casing 700. The first mounting unit 810 and the second mounting unit 820 ).

The first mounting portion 810 is formed with a hollow at a portion corresponding to the image panel 410 of the display portion 400 and presses the display portion 400 to mount the holder 800 on the casing 700 . The second mounting portion 820 is bent from the first mounting portion 810 and engaged with the casing 700 so that the holder 800 can be mounted on the casing 700.

A second through hole 821 is formed in the holder 800 so that the holder 800 can be detachably attached to the casing 700. A hook 730 is hooked to the casing 700 .

The second through hole 821 may be provided in the second mounting portion 820. At this time, in order to stably mount the display unit 400 on the casing 700, it is preferable that at least four of the second mounting units 820 are provided as shown in FIG. At this time, at least one second through hole 821 may be provided in each second mounting portion 820.

The hook 730 is formed on the side of the casing 700 and the second through hole 821 is formed in the second mounting portion 820 so that the hook 730 can be inserted. At this time, since the second mounting portion 820 has elasticity, the holder 800 can be easily attached to and detached from the casing 700.

Due to such a structure, the display unit 400 can be easily mounted or dismounted to the casing 700 without using a screw fastening method using the holder 800.

The pressing force applied to the display unit 400 by the holder 800 can be adjusted by adjusting the size of the second through hole 821 and the position of the second mounting unit 820, So that the display unit 400 can be firmly coupled to the casing 700.

11 is a photograph of an image displayed on a video panel in a head-up display device without a light diffusing member 500. FIG. 12 is a photograph of an image displayed on a video panel in a head-up display device having a planar light diffusing member instead of the curved light diffusing member 500 in the structure of FIG. 13 is a photograph of the image displayed on the image panel in the head-up display device of the embodiment having the curved light diffusing member 500 of FIG.

11 and 12 show images implemented in the head-up display device to be compared and FIG. 13 shows images implemented in the head-up display device according to the embodiment.

11 to 13, the graph on the upper right side shows the illuminance distribution of the image measured in the vertical direction at the center of the image, and the graph on the lower left side shows the distribution of the illuminance measured in the horizontal direction And the illuminance distribution of the image.

Referring to FIG. 11, in the head-up display device without the light diffusion member, the light is concentrated at the central portion of the image panel, particularly at the portion where the light emitting element is disposed, 12 and Fig. 13, respectively.

12, in the head-up display apparatus having the planar light diffusing member, the light uniformity is higher than in the case of FIG. 11, but the light is still concentrated in the central portion of the image panel, Which is lower than the case of FIG.

Referring to Fig. 13, in the head-up display device of the embodiment having a curved optical pick-up member, compared to Figs. 11 and 12, light has a substantially uniform luminance over the entire image panel, It can be clarified that the uniformity is high.

11 to 13, it can be clearly seen that the optical uniformity of the image displayed on the image panel in the head-up display apparatus having the curved light diffusing member 500 is remarkably increased.

Since the light diffusion member 500 is provided in a curved shape having a curvature corresponding to the curvature of the upper surface or the lower surface of the transparent portion 320, the uniformity of the light passing through the transparent portion 320 and reaching the image panel Can be improved.

While only a few have been described above with respect to the embodiments, various other forms of implementation are possible. The technical contents of the embodiments described above may be combined in various forms other than the mutually incompatible technologies, and may be implemented in a new embodiment through the same.

100:
200: first light transmitting member
300: second light transmitting member
400:
500: light diffusion member
600: a first heat-
700: casing
800: Holder

Claims (15)

A light source;
A first light transmitting member disposed so as to face the light source unit in the optical axis direction;
A second light transmitting member disposed to face the first light transmitting member in the direction of the optical axis;
A display unit provided in a plate shape and arranged to face the second light transmitting member in the direction of the optical axis and to which light passing through the second light transmitting member is incident; And
A light diffusing member disposed above or below the second light transmitting member,
Lt; / RTI >
Wherein the second light-
And a translucent portion whose upper surface is convex upward and whose lower surface is convex downwardly convex,
The light-
And a curvature corresponding to a curvature of the upper surface or the lower surface of the transparent portion. The method according to claim 1,
The light-
Wherein the head-up display device is disposed in a film shape and is arranged in a curved shape that is convex downward or convex upward. The method according to claim 1,
Wherein the first light transmitting member comprises:
And a first flange protruded downward to separate the light source unit and the first light transmitting member in the optical axis direction. The method according to claim 1,
Wherein the first light transmitting member comprises:
And a convex lens portion through which light incident from the light source passes. The method according to claim 1,
Wherein the first light transmitting member comprises:
And a second flange protruded upward to separate the first light transmitting member and the second light transmitting member in the optical axis direction. 6. The method of claim 5,
Wherein the second light-
And a third flange protruding downward and formed to correspond to the second flange, and spaced apart from the first light transmitting member and the second light transmitting member in the optical axis direction. The method according to claim 6,
Wherein a first projection is formed on an upper surface of the second flange and a first recessed groove is formed in a lower surface of the third flange at a position corresponding to the first projection to receive the first projection. The method according to claim 6,
Wherein a first protrusion is formed on a lower surface of the third flange and a first recessed portion into which the first protrusion is inserted is formed on a top surface of the second flange at a position corresponding to the first protrusion. The method according to claim 1,
And a first heat dissipating unit coupled to the light source unit and including a plurality of first radiating fins. The method according to claim 1,
A casing accommodating the first light transmitting member and the second light transmitting member; And
A holder for coupling the display portion to the casing,
And a head-up display device. 11. The method of claim 10,
The casing includes:
And a second heat-radiating portion which is formed on the side portion and includes a second radiating fin. 11. The method of claim 10,
Wherein the holder comprises:
A first mounting portion for pressing the display portion to mount the holder to the casing; And
A second mounting portion that is bent from the first mounting portion and is coupled to the casing so that the holder is mounted on the casing;
And a head-up display device. 13. The method of claim 12,
The casing includes a hook protruding from the side portion,
And the second mounting portion includes a second through hole into which the hook is inserted. The method according to claim 1,
Wherein the light diffusion member is disposed between the first light transmitting member and the second light transmitting member. The method according to claim 1,
Wherein the light diffusion member is disposed between the second light transmitting member and the display unit.

Images