KR102362728B1 - Head up display device - Google Patents

Abstract

The head-up display device of the embodiment includes an image generating unit for generating an image having information; a plurality of light sources emitting light; a light guide unit disposed on the optical axis of the plurality of light sources to guide the light emitted from the plurality of light sources to the image generator; and a virtual image optical unit generating the image generated and projected by the image generating unit as a virtual image. It includes, wherein the light guide unit is disposed on the plurality of light sources, the first optical member including a base substrate and a lens unit formed to protrude from the base substrate; and a light incident surface disposed on the first optical member and having curved surfaces convex in the direction of the plurality of light sources and a light exit surface facing the light incident surface and having a curved surface convex in the direction of the image generator; A second optical member comprising a; In addition, it is possible to adjust the beam shape of the light supplied to the image generator and to provide a virtual image with improved image quality to the driver by allowing uniform light to be transmitted.

Description

Head up display device {HEAD UP DISPLAY DEVICE}

The embodiment relates to a head-up display device.

A head-up display device is a front-view device that displays as a virtual image by superimposing various information necessary for driving with an external view at the position of the gaze line of the pilot or driver in order to minimize the gaze movement of the pilot or driver. to be. Such head-up display devices are generally known.

In the case of a head-up display device for a vehicle, information of the instrument panel or navigation information may be displayed on the windshield in the driver's eye field direction, so that the driver can easily grasp driving information without moving the field of view to another place.

The head-up display device includes an image panel for realizing a displayed image and a light emitting unit for supplying a light source to the image panel. In particular, a light emitting diode is used for the light emitting part, but in order to improve image quality in a head-up display device, it is necessary to minimize the loss of light emitted from the light emitting device and supply uniform light to the image panel. something is needed

The embodiment provides a head-up display device capable of obtaining a high-quality image by improving light uniformity by disposing a plurality of optical members between a light source and an image panel.

An embodiment includes an image generating unit that generates an image having information; a plurality of light sources emitting light; a light guide part disposed on the optical axis of the plurality of light sources to guide the light emitted from the plurality of light sources to the image generator; and a virtual image optical unit generating the image generated and projected by the image generating unit as a virtual image. a first optical member disposed on the plurality of light sources, the light guide unit including a base substrate and a lens unit protruding from the base substrate; and a light incident surface disposed on the first optical member and having a curved surface convex in the direction of the plurality of light sources and a light exit surface facing the light incident surface and having a convex curved surface in a direction of the image generator; A second optical member comprising a; It provides a head-up display device comprising a.

The light guide part may include an intermediate member disposed between the first optical member and the second optical member, and the intermediate member may be a diffusion plate.

The intermediate member may further include at least one of a prism sheet and DBEF.

The base substrate may be disposed to be perpendicular to the optical axis, and the plurality of light sources may be arranged on the base substrate in at least one of an x-axis direction and a y-axis direction perpendicular to the x-axis.

The base substrate may be disposed to face the plurality of light sources, and the lens unit may be disposed to face the second optical member.

The lens unit may have a hemispherical or hemispherical shape.

The plurality of lens units may be provided, and the plurality of lens units may be disposed to correspond to the plurality of light sources, respectively.

The plurality of lens units may be disposed to be spaced apart from each other.

The plurality of lens units may be disposed so that at least one adjacent lens unit and an outer region overlap each other.

The second optical member may have a vertical cross-section formed by connecting a first curve forming the light incident surface and a second curve forming the light exit surface.

In addition, the vertical section may include the first curve, the second curve, and a straight line connecting the first curve and the second curve.

The second optical member may be a horizontal column formed by extending the vertical cross-section in the x-axis direction.

The second optical member may include a plurality of the horizontal pillars overlapped in the y-axis direction.

The horizontal pillars of the second optical member may be overlapped in the y-axis direction to correspond to the rows in which the plurality of light sources are disposed.

A central portion of the curved surface of the horizontal pillar and a central portion of the lens unit may be disposed on the optical axis of the light source.

The light guide part may further include a housing part disposed to include the first optical member, the intermediate member, and the second optical member.

The virtual image optical unit may include at least one reflective mirror; a position adjusting unit for adjusting a position of the at least one reflection mirror; and a driving motor unit controlling at least one of a reflection angle and a diffraction angle of the at least one reflection mirror by controlling the position adjustment unit. may include

The head-up display device according to the embodiment includes a plurality of optical members for collecting or diffusing light emitted from a light source, so that a beam shape of light supplied to an image panel can be adjusted and uniform light is transmitted Thus, it is possible to provide a virtual image with improved image quality to the driver.

1 is a view showing a block diagram of an embodiment of a head-up display device,
2 is a view showing an embodiment of a vehicle equipped with the head-up display device illustrated in FIG. 1;
3 is an enlarged cross-sectional view of only a part of the head-up display device illustrated in FIG. 2;
4a to 4b are views showing an embodiment of the first optical member,
5 is a view showing a plan view, a perspective view and a cross-sectional view of an embodiment of the first optical member,
6 is a view showing a plan view, a perspective view and a cross-sectional view of an embodiment of the second optical member,
7 is a view showing an embodiment of the second optical member,
8 is a view showing an embodiment of the arrangement of the light guide unit and the image generating unit,
9A is a view showing a simulation result of optical characteristics in a conventional head-up display device that does not include a light guide unit;
9B is a diagram illustrating a simulation result of optical characteristics in a head-up display device according to an exemplary embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention that can specifically realize the above objects will be described with reference to the accompanying drawings.

In the description of the embodiment according to the present invention, in the case where it is described as being formed on "on or under" of each element, on (above) or below (on) or under) includes both elements in which two elements are in direct contact with each other or one or more other elements are disposed between the two elements indirectly. In addition, when expressed as “up (up) or down (on or under)”, it may include the meaning of not only the upward direction but also the downward direction based on one element.

In addition, as used hereinafter, relational terms such as “first” and “second”, “upper/upper/above” and “lower/lower/below” refer to any physical or logical relationship or order between such entities or elements. may be used only to distinguish one entity or element from another, without necessarily requiring or implying that

In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not fully reflect the actual size.

1 is a block diagram illustrating the configuration of a head-up display device according to an embodiment.

The head-up display apparatus 100 according to an exemplary embodiment may include a light source unit 110 , a light guide unit 120 , an image generation unit 130 , a virtual image optical unit 140 , and a control unit 150 .

The light source unit 110 emits light supplied to the image generation unit, and may include a plurality of light sources 112 and a substrate 114 .

The plurality of light sources 112 may be disposed on the substrate 114 . An electrode pattern for electrical connection to the light source 112 may be formed on the substrate 114, and a PCB ( Printed Circuit Board) may be a substrate or may be formed in the form of a film.

In addition, the substrate 114 may selectively use a single-layer PCB, a multi-layer PCB, a ceramic substrate, a metal core PCB, or the like.

The controller 150 may serve to drive the plurality of light sources 112 through the substrate 114 .

The plurality of light sources 112 may be, for example, a light emitting diode (LED) or a laser (Light Amplification by Stimulated Emission of Radiation), but the embodiment is not limited to the type of the light source 112 .

The plurality of light sources 112 may be a side view type light emitting diode or a top view type light emitting diode.

In addition, the plurality of light sources 112 included in the light source unit 110 include a light emitting diode (Light Emitting Diode, LED) chip, a light emitting device package in which the light emitting device (LED) is fixed to the body, or an optical member in the light emitting device package. It may be in the form of a light emitting module.

When the light source 112 is a light emitting diode chip (LED chip), the light emitting diode chip is composed of a blue LED chip or an ultraviolet LED chip, or a red LED chip, a green LED chip, a blue LED chip, a yellow green LED chip. , may be configured in a package form in which at least one or more of the white LED chips are combined.

Here, the white LED may be implemented by combining a yellow phosphor on a blue LED or using a red phosphor and a green phosphor on the blue LED at the same time, and a yellow phosphor on the blue LED. (Yellow phosphor), red phosphor (Red phosphor), and green phosphor (Green phosphor) can be implemented simultaneously.

Meanwhile, the plurality of light sources 112 included in the light source unit 110 may emit light having different wavelengths or may emit light having the same wavelength band. In this case, the controller 150 may control whether at least one light source among the plurality of light sources 112 emits light through the substrate 114 so that the plurality of light sources 112 operate alternately.

In addition, when the plurality of light sources 112 emit light of red, green, and blue components, in order to express the virtual image to be displayed in color, the controller 150 controls the blinking of the plurality of light sources 112 on the substrate 114 . ) can be controlled through

Also, in order to adjust the luminance of the virtual image to be displayed in the head-up display, the controller 150 may control the brightness level of the light emitted from the light source 112 . For this reason, high-quality light can be provided according to the surrounding environment, such as at night or during the day when strong direct sunlight exists.

Meanwhile, the light guide unit 120 may be disposed on the optical axis of the plurality of light sources 112 to guide the light emitted from the light source unit 110 to the image generator 130 .

The image generating unit 130 may generate an image having information, and project the image having information as 'image light' by the light guided by the light guide unit 120 .

For example, the image generating unit 130 may include at least one of a liquid crystal display (LCD), digital light processing (DLP), and liquid crystal on silicon (LCoS), but in the embodiment, an image is generated. It is not limited to the type of the part 130 .

The controller 150 provides image data having information to the image generator 130 , and the image generator 130 generates an image using the image data received from the controller 150 . To this end, the controller 150 may receive image data by electrically connecting to an external vehicle information providing unit (not shown) and the like. For example, the vehicle information providing unit may be an Electronic Control Unit (ECU), and the control unit 150 and the ECU may be electrically connected.

The ECU may store and control information about the operation of the vehicle and the device of the vehicle, and the controller 150 may receive such information data and convert it into image data to be implemented as image information.

For example, the controller 150 may execute a process of converting driving information transmitted from an ECU, which is an internal system of the vehicle, into displayable data.

In addition, the control unit 150 may serve to supply power required by the head-up display apparatus 100 according to an embodiment. For example, the controller 150 may supply power to each of the substrate 114 and the image generator 130 .

The virtual image optical unit 140 may generate a virtual image from the image light projected from the image generating unit 130 and obtained by obtaining the image, and output it through the output terminal OUT.

The virtual image optical unit 140 may include at least one reflective mirror, and includes a position adjusting unit for adjusting the position of the at least one reflective mirror, and a reflection angle or a diffraction angle of the at least one reflective mirror by controlling the position adjusting unit. It may further include a driving motor unit for controlling at least one.

For example, the at least one reflection mirror may include any one of a flat mirror, a concave mirror, a convex mirror, or a custom free-form mirror.

The reflective mirror may be formed by including a reflective layer made of at least one of Al (Aluminum), Ag (Silver), and Au (Gold) on its surface.

In addition, the at least one reflection mirror may include a redirection mirror for changing the projection direction of the supplied image light.

Hereinafter, the head-up display apparatus 100 mounted on the vehicle 200 will be described in order to help the understanding of the above-described head-up display apparatus 100 illustrated in FIG. 1 . However, the head-up display apparatus 100 illustrated in FIG. 1 may be mounted on various vehicles other than the vehicle 200 illustrated in FIG. 2 , such as an airplane.

FIG. 2 is a diagram illustrating an embodiment of a vehicle 200 in which the head-up display apparatus 100 illustrated in FIG. 1 is mounted, and the control unit 150 of FIG. 1 is omitted.

Referring to FIG. 2 , a vehicle 200 may include a head-up display device 100 , a windshield glass 202 , and a light combiner 204 . Although the head-up display device 100 may be disposed under the windshield glass 202 , the embodiment is not limited to the location of the head-up display device 100 in the vehicle 200 .

Although x, y, and z shown in each of the drawings described below indicate a Cartesian coordinate system, it goes without saying that embodiments may be described by other coordinate systems.

3 is a cross-sectional side view of the configuration of the light source unit 110, the light guide unit 120, the image generator 130, and the virtual image optical unit 140 in the head-up display device 100 shown in FIG. .

Referring to FIG. 3 , the light guide unit 120 may be disposed between the light source unit 110 and the image generation unit 130 .

The light guide unit 120 may include a first optical member 122 disposed adjacent to the light source unit 110 and a second optical member 126 disposed adjacent to the image generator 130 .

The first optical member 122 may include a base substrate 122-1 and a lens unit 122-2. The lens unit 122 - 2 may be formed to protrude from the base substrate 122-1.

At this time, the base substrate 122-1 may face the plurality of light sources, the lens unit 122-2 may be disposed to protrude toward the second optical member 126, and the base substrate 122-1 may include the light source unit ( It may be disposed to be perpendicular to the optical axes O1 and O2 of the 110 .

The second optical member 126 may be disposed on the first optical member 122, and is formed on the light incidence surface 126-1 and the light incidence surface having a convex curved surface in the direction of the light source unit 110 including a plurality of light sources. It may include a light emitting surface 126 - 2 facing and having a convex curved surface in the direction of the image generating unit 130 .

In addition, the light guide part 120 may further include an intermediate member 124 .

The intermediate member 124 may be disposed between the first optical member 122 and the second optical member 126 . The intermediate member 124 may diffuse the light of the concentrated light source passing through the first optical member 122 .

For example, the intermediate member 124 may be a diffuser sheet.

The intermediate member 124 diffuses the light of the light source that has passed through the first optical member, thereby improving luminance uniformity of the light passing through the intermediate member.

For example, by including the intermediate member in the light guide part, uniform light can be obtained by reducing light source unevenness caused by the difference in luminance between the center and the edge of the light source.

In addition, the intermediate member may further include at least one of a prism sheet and a dual brightness enhancement film (DBEF). When the prism sheet or DBEF is included, the luminance of the light source passing through the intermediate member may be increased.

Meanwhile, the middle portion of the lens unit 122-2 is positioned on the optical axes O1 and O2 of the light source 112 so that the optical axis of the light source 112 and the optical axis of the first optical member lens unit 122-2 coincide. Also, the central portion of the light incident surface 126 - 1 and the central portion of the light emitting surface 126 - 2 of the second optical member may also be disposed on the optical axes O1 and O2 of the light source 112 . .

In the head-up display device of the embodiment shown in FIG. 3 , the plurality of light sources 112 may be arranged in two rows. For example, although the embodiment of FIG. 3 may include six light sources, the embodiment is not limited to the number of light sources 112 . That is, the light source unit 110 of the head-up display apparatus 100 according to the embodiment may include more or fewer than six light sources 112 .

For example, in the embodiment of FIG. 3 , three light sources are arranged in an x-axis direction, and three light sources constituting one row are arranged in two rows in the y-axis direction. That is, in the embodiment, the six light sources may be arranged in 2 rows and 3 columns, but the arrangement of the plurality of light sources is not limited to the illustrated embodiment and may be arranged in various forms.

4A to 4B are views illustrating exemplary embodiments of the first optical member 122 .

4A to 4B , in the first optical member, the lens unit 122 - 2 may have a semi-spherical or semi-elliptical shape. That is, a hemispherical or semi-elliptical spherical lens unit 122-2 may protrude from the base substrate 122-1.

In this case, the lens unit 122-2 is sized to cover the light source, and the area of the cross-section at the surface where the lens unit 122-2 meets the base substrate 122-1 may be greater than or equal to the cross-sectional area of the light source.

(a) of Figure 4a is a view showing a plan view of the first optical member, (b) is a view showing a cross section cut along line AA` in (a) drawing, (c) is a view showing BB` in drawing (a) A drawing showing a cross-section cut by a line.

The lens unit 122 - 2 formed to correspond to each light source may be formed by overlapping at least one adjacent lens unit and an outer region.

For example, referring to FIG. 4A , in the drawing, lens units adjacent in a row direction are disposed to be spaced apart from each other, but lens units adjacent in a column direction may be formed so that neighboring outer regions overlap each other.

In addition, although not shown in the drawings, the plurality of lens units 122 - 2 adjacent to each other in the column direction are arranged to be spaced apart from each other, and the lens units are arranged in the row direction so that the neighboring lens units overlap each other. can be formed.

Also, in the plurality of lens units, the outer regions of neighboring lens units may all overlap each other.

In this case, the arrangement interval of the lens unit 122 - 2 may vary according to the arrangement interval of the corresponding light source.

In FIG. 4B , the horizontal cross section of the lens unit 122-2 may have an elliptical shape. For example, the lens unit 122-2 may be formed on the base substrate 122-1 in a semi-elliptical shape.

(a) of Figure 4b is a view showing a plan view of the first optical member, (b) is a view showing a cross section cut along line AA` in (a) drawing, (c) is a view showing BB` in drawing (a) A drawing showing a cross-section cut by a line.

The plurality of lens units 122 - 2 may be disposed to be spaced apart from each other. For example, referring to FIG. 4B , in the drawing, not only the lens units adjacent in the row direction but also the lens units adjacent in the column direction may be spaced apart from each other.

Although FIG. 4B shows an embodiment in which the horizontal cross-section has an elliptical shape having a long axis in the vertical direction, the shape of the lens unit 122-2 is not limited to the illustrated embodiment, and has an elliptical shape having a long axis in the horizontal direction. It may have a horizontal cross-section or may have a circular horizontal cross-section.

In the first optical member of the embodiment shown in FIGS. 4A to 4B , the light emitted from the plurality of light sources is emitted from the lens unit 122-2 due to the lens unit 122-2 protruding toward the image generating unit. It may have an effect of focusing in the direction of the image generator while passing through.

Accordingly, when the arrangement of the plurality of light sources is changed, the arrangement shape of the lens unit in the first optical member may be formed differently accordingly.

5 is a view showing an embodiment of the first optical member.

FIG. 5A is a plan view of the first optical member, and in the embodiment of FIG. 5 , the lens unit 122-2 of the first optical member is an elliptical in which the diameter in the y-axis direction is larger than the diameter in the x-axis direction. may be, and the lens units adjacent to each other in the y-axis direction, that is, in the column direction, may be formed to overlap each other in adjacent portions.

Figure 5 (b) is a perspective view of the first optical member, (c) is a front view in the plane cut along line AA' in Figure 5 (a), (d) is BB in Figure 5 (a) `Corresponds to the front view of the plane cut by a line.

For example, the first optical member embodiment illustrated in FIG. 5 may be an optical member used when the number of light sources included in the head-up display device is six and the plurality of light sources are arranged in two rows and three columns.

The first optical member of the embodiment shown in FIGS. 4A to 5 may be formed such that a lens unit is disposed to correspond to the light source, so that light emitted from the light source is concentrated and emitted while passing through the first optical member.

That is, by arranging the first optical member on the light source unit to focus the light emitted and diffused from the light source, the luminance of the light directed toward the image generating unit may be increased, thereby improving the light efficiency of the light source unit.

6 is a view of an embodiment of the second optical member.

6A is a plan view of the second optical member, and a portion indicated by a dotted line is the central portion (C) of the second optical member and may be disposed on the optical axis of the light source. That is, the central portion (C) of the second optical member may be the most protruding portion of the curved surface in the shape of the horizontal column.

Figure 6 (b) is a perspective view of the second optical member, (c) is a front view in the plane cut along line AA` in Figure 6 (a), (d) is BB in Figure 6 (a) `Corresponds to the front view of the plane cut by a line.

That is, the second optical member may have a vertical section formed by connecting the first curve 126-1a constituting the light incident surface and the second curve 126-2a constituting the light exit surface to each other. It may have a horizontal column shape extending in the axial direction. In this case, the vertical cross-section of the second optical member may be a cross-section in the yz plane.

Meanwhile, the second optical member may have a three-dimensional shape formed to include only a portion of a cylinder. That is, the second optical member may have a three-dimensional shape in which a cylinder cut in the height direction to include only a portion of the circumference of the circular bottom surface is symmetrically formed on both sides with respect to the xy plane. Also, the second optical member may have such a three-dimensional shape overlapping in the y-axis direction.

For example, the second optical member may have a form in which two three-dimensional shapes are overlapped in the y-axis direction to correspond to the light sources arranged in two rows.

In this case, in the three-dimensional shape included in the second optical member, the center of the curved surface may be disposed on the optical axis of the light source. 6B is a perspective view of a second optical member having two three-dimensional shapes.

7 is a view showing another embodiment of the second optical member (126). Figure 7 (a) is a perspective view of the second optical member, Figure 7 (b) is a cross-sectional view of the second optical member cut along line BB` in Figure 7 (a).

Referring to FIG. 7(b), the second optical member connects the first curve 126-1a forming the light incident surface and the second curve 126-2a forming the light exit surface, and the first curve and the second curve It may have a vertical cross section made of a straight line (126-3a).

In addition, referring to FIG. 7( a ), the second optical member may have a three-dimensional shape of a horizontal column formed by extending the vertical cross-section shown in FIG. 7( b ) in the x-axis direction.

That is, in the second optical member of the embodiment illustrated and described in FIG. 7 , the light incident surface and the light output surface extend in the x-axis direction, respectively, and the light incident surface, the light exit surface, and the light incident surface are two curved surfaces. It may be a three-dimensional shape formed as a side surface connecting both end points of the light emitting surface to each other.

6 to 7 , in the second optical member, the light incident surface is a curved surface convexly formed in the direction of the first optical member, and the light exit surface may have a curved surface shape formed convexly in the image generating unit direction. And, due to the curved shape of the second optical member, the vertical direction of the light emitted from the light source, that is, the light in the y-axis direction can be more concentrated.

Meanwhile, the first optical member 122 and the second optical member 126 of the embodiment of FIGS. 4A to 7 described above are, for example, an acrylic resin-based material such as PMMA (Polymethylmethacrylate), PET (polyethylene terephthlate), and COC. (Cyclic Olefin Copolymers), PEN (polyethylene naphthalate), PC (Polycarbonate), PS (Polystyrene), or MS (Mathacylate styrene) may be formed including any one of the resin, but the embodiment is a first optical member and a second It is not limited to the material of the optical member.

In addition, in the first optical member 122 , the base substrate 122-1 and the lens unit 122-2 may be made of the same material, for example, the base substrate and the lens unit may be integrally formed. have.

8 is a view showing an embodiment of the light guide unit 120 including the optical member.

8 (a) is a plan view showing the arrangement of the light guide unit 120 and the image generating unit 130, (b) of FIG. 8 is a perspective view, (c) is AA` in FIG. It is a front view in a plane cut by a line, and (d) corresponds to a front view in a plane cut in line BB` in (a) of FIG. 8 .

Referring to FIG. 8 , the light guide unit 120 includes a first optical member 122 disposed adjacent to the light source unit, an intermediate member 124 disposed on the first optical member, and a second optical member disposed on the intermediate member. It may have a configuration including the member 126 .

Meanwhile, although not shown in the drawings, the light guide unit 120 may further include a housing unit disposed including the first optical member 122 , the intermediate part 124 , and the second optical member 126 . For example, in the housing part, the first optical member, the intermediate member, and the second optical member may be stacked and disposed, and the first optical member, the intermediate member, and the second optical member are disposed in the housing part by maintaining a predetermined interval. A holder portion for fixing each optical member may be further included to be formed.

At this time, the light guide unit 120 focuses the light supplied from the light source unit in the direction of the image generating unit 130 from the first optical member 122 , and then passes through the intermediate member 124 so that the concentrated light is uniformly distributed. In addition, the second optical member 126 may have the effect of improving the light efficiency supplied from the light source unit to the image generating unit by more concentrating the light in the y-axis direction, which is the vertical direction.

9A to 9B are diagrams illustrating simulation results for an image output from the light supplied from the light source unit being supplied to the image generating unit.

9A is an image output result when the light guide unit is not included, and FIG. 9B corresponds to an image output result of the image generator when the light guide unit is included in the embodiment.

In the case of FIG. 9A in which the light guide part of the embodiment is not included, depending on the arrangement of the light sources, there may be a deviation of the light output in the space between the light sources and the portion where the light sources are located, so that light source spots may occur, and the overall luminance of the output image It can be seen that the lower

In comparison with this, referring to FIG. 9B where the light guide part of the embodiment is included, it can be seen that the variation in luminance of the part where the light source is located and the part that is the spaced apart space between the light sources is reduced, so that light source spots do not occur, and the overall luminance is also improved. can

That is, in the case of the head-up display device according to the embodiment, by including a plurality of optical members in the light guide unit, the luminance of the virtual image generated by concentrating the light emitted from the light source can be improved. In addition, by including the intermediate member in the light guide portion to uniformly diffuse the focused light, it is possible to improve the optical properties of the virtual image generated using the light supplied through the light guide portion.

In the above, the embodiment has been mainly described, but this is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are not exemplified above in the range that does not depart from the essential characteristics of the present embodiment. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

100: head-up display device 110: optical unit
120: light guide part 122: first optical member
124: intermediate member 126: second optical member
130: image generating unit 140: virtual image optical unit

Claims (17)

a light source emitting light;
an image generating unit disposed to face the light source unit in a first direction parallel to an optical axis and generating an image having information;
a light guide unit disposed between the light source unit and the image generating unit and guiding the light emitted from the light source unit to the image generating unit; and
and a virtual image optical unit generating the image generated by the image generating unit as a virtual image,
The light source unit includes a plurality of light sources arranged in a matrix form including a plurality of rows and a plurality of columns, the plurality of rows are arranged in a second direction perpendicular to the first direction, and the plurality of columns are arranged in a third direction perpendicular to each of the first and second directions,
The light guide
a first optical member including a plurality of lenses arranged in a matrix form including a plurality of rows and a plurality of columns to correspond to the plurality of light sources; and
a first optical member disposed on the first optical member and comprising a light incident surface having a first curved surface convex in the direction of the light source and a light exit surface facing the light incident surface and having a convex second curved surface in the direction of the image generator 2 including an optical member,
Among the plurality of lenses, the lenses arranged in the third direction are spaced apart from each other, and the lenses arranged in the second direction overlap adjacent outer regions. According to claim 1,
The light guide unit includes an intermediate member disposed between the first optical member and the second optical member,
The intermediate member is a diffusion plate including a first surface and a second surface,
Each of the first and second surfaces of the diffusion plate is a plane perpendicular to the optical axis of the light source unit. 3. The method of claim 2,
The intermediate member is a head-up display device further comprising at least one of a prism sheet or DBEF (Dual Brightness Enhancement Film). According to claim 1,
The first optical member includes a base substrate disposed to be perpendicular to the optical axis of the light source unit, and the plurality of lenses protrude from the base substrate in a direction toward the second optical member. delete delete According to claim 1,
Each of the plurality of lenses is a hemispherical or semi-elliptical head-up display device. delete According to claim 1,
Each of the plurality of light sources has a different wavelength head-up display device. According to claim 1,
The second optical member is a head-up display device having a vertical cross-section including a straight line connecting the first curved surface and the second curved surface. delete 11. The method of claim 10,
The second optical member is a head-up display device that is a horizontal column formed by extending the vertical section in the third direction. 13. The method of claim 12,
The second optical member includes a plurality of the horizontal pillars overlapped in the second direction,
The horizontal pillars are disposed overlappingly in the second direction corresponding to the rows in which the plurality of light sources are disposed,
A central portion of the curved surface of the horizontal pillar and a central portion of the lens are disposed on the optical axis of the light source unit. delete delete delete According to claim 1, wherein the virtual image optical unit at least one reflection mirror;
a position adjusting unit for adjusting a position of the at least one reflection mirror; and
and a driving motor unit controlling at least one of a reflection angle and a diffraction angle of the at least one reflection mirror by controlling the position adjustment unit.

Images