Mirrorless head-up display device

Abstract

The present invention relates to a mirrorless head-up display device comprising: a printed circuit board on which a plurality of light-emitting elements arranged in a matrix form are mounted; and a bottom plate made of a metal material, which is in contact with the printed circuit board, wherein the bottom plate includes a first heat sink for dissipating heat transferred from the printed circuit board.

Description

Mirrorless head-up display device

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

[0002] With the recent release of vehicles equipped with Head-Up Displays (HUDs), user interest in them is increasing.

[0003] The head-up display (HUD) described above is a device that provides vehicle operation information, such as driving information or navigation information, within a range that does not deviate from the driver's line of sight while driving a vehicle or aircraft. Early head-up displays were developed to be attached to aircraft, particularly fighter jets, to provide flight information to pilots during flight, and the vehicle head-up display device was developed by adapting this principle to vehicles.

[0004] For example, when driving a vehicle at approximately 100 km / h, assuming it takes about 2 seconds for the driver to shift their gaze from the instrument panel to the road, the vehicle travels about 55 meters during that time, so there is always a possibility of an accident. As one method to reduce this risk, vehicle head-up displays are being developed. By displaying instrument panel information (speed, mileage, RPM, etc.) or navigation information on the driver's line of sight on the windshield, this enables safe driving by allowing the driver to perceive important driving information or route information without taking their eyes off the road while driving.

[0005] A HUD according to the prior art, such as registration number 10-2305956, is equipped with a plurality of mirrors (e.g., folding mirrors, aspherical mirrors) and reflects the mirrors to the windshield. A HUD implemented in this manner is suitable for providing simple information such as the vehicle's speed or direction, but there is a problem that the light energy output to the windshield through the mirrors is insufficient to display various information.

[0006] Mirrorless head-up display devices currently under research to resolve these issues must utilize multiple light-emitting elements. When equipped with multiple light-emitting elements, the components must be configured in a form different from existing HUDs.

[0007] The present invention aims to provide a mirrorless head-up display device that includes a plurality of light-emitting elements and is composed of components of a different form from conventional HUDs in order to solve the aforementioned problems.

[0008] The problems of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below.

[0009] To achieve the above objective, a mirrorless head-up display device according to an embodiment of the present invention comprises: a printed circuit board on which a plurality of light-emitting elements arranged in a matrix form are mounted; and a bottom plate made of a metal material that contacts the printed circuit board; wherein the bottom plate comprises a first heat sink that emits heat received from the printed circuit board.

[0010] The bottom plate includes a side wall that supports the printed circuit board.

[0011] A mirrorless head-up display device according to an embodiment of the present invention further includes a side frame that contacts at least a portion of the bottom plate.

[0012] The above side wall, while in contact with the above side frame, transfers heat received from the above printed circuit board to the above side frame.

[0013] The above side frame includes a second heat sink that is formed extending in a direction different from the first heat sink.

[0014] The above side wall is positioned between the side frame and the side of the printed circuit board.

[0015] The bottom plate further includes a base plate whose upper surface contacts the printed circuit board; and the first heat sink is formed extending downward from the lower surface of the base plate.

[0016] The above side wall is formed to extend upward from the base plate.

[0017] The first heat sink is formed integrally with the base plate and the side wall.

[0018] A mirrorless head-up display device according to an embodiment of the present invention comprises: a lens portion disposed on the printed circuit board; and

[0019] It further includes a supporter that supports the lens portion between the lens portion and the side wall.

[0020] The above supporter has a frame shape that forms a cavity inside.

[0021] A mirrorless head-up display device according to an embodiment of the present invention further includes a side frame that presses the lens portion toward the bottom plate.

[0022] A mirrorless head-up display device according to an embodiment of the present invention further includes an LCD panel arranged while maintaining an optical gap with the lens portion; and the side frame includes a mounting portion on which the LCD panel is mounted.

[0023] The above side frame receives heat by contacting the above bottom plate.

[0024] The above side frame includes a heat sink that dissipates heat received from the bottom plate.

[0025] According to the present invention, there is one or more of the following effects.

[0026] First, it can output a high amount of light to the windshield, displaying a clear image and effectively providing various information via the HUD.

[0027] Second, the bottom plate has the effect of controlling the heat generated by the HUD.

[0028] Third, integrating the bottom plate and heatsink into a single unit has the effect of reducing the number of parts.

[0029] Fourth, the bottom plate has the effect of supporting the HUD components and maintaining the rigidity of the entire product.

[0030] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0031] FIG. 1 is a drawing illustrating the exterior of a mirrorless head-up display device according to an embodiment of the present invention.

[0032] FIG. 2 is a drawing referenced to explain the configuration of a head-up display device according to an embodiment of the present invention.

[0033] FIG. 3 is a drawing referenced to explain a bottom plate according to an embodiment of the present invention.

[0034] FIG. 4 is a drawing referenced to explain a supporter and a bottom plate according to an embodiment of the present invention.

[0035] FIG. 5 is a top view of some components of a mirrorless head-up display device according to an embodiment of the present invention.

[0036] FIG. 6 is a drawing referenced to explain a side frame according to an embodiment of the present invention.

[0037] Figure 7 is a cross-sectional view of A-A' in Figure 1.

[0038] Figure 8 is a cross-sectional view of B-B' in Figure 1.

[0039] FIG. 9 is a drawing referenced to explain a spacing member according to an embodiment of the present invention.

[0040] FIG. 10 is a drawing referenced to explain a spacing member according to an embodiment of the present invention.

[0041] FIG. 11 is an enlarged view of a portion of FIG. 3.

[0042] FIGS. 12 and 13 are drawings referenced to explain a lens portion according to an embodiment of the present invention.

[0043] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols will be assigned the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, in describing embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted. Additionally, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification; the technical concept disclosed in this specification is not limited by the attached drawings, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the present invention.

[0044] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0045] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0046] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0047] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0048] FIG. 1 is a drawing illustrating the exterior of a mirrorless head-up display device according to an embodiment of the present invention.

[0049] Referring to the drawings, the mirrorless head-up display device (10) according to an embodiment of the present invention (Mirrorless head-up display device) (100) (hereinafter, device) displays a screen by directly outputting visible light to the windshield of a vehicle.

[0050] A HUD according to the prior art uses multiple mirrors to magnify a small-sized image and project it onto the windshield, thereby visually providing necessary information to the driver. However, such a HUD cannot provide a clear image to the driver due to insufficient visible light projected onto the windshield. Consequently, a HUD according to the prior art provides only relatively simple information, such as vehicle speed and TBT (Turn by Turn) images.

[0051] The device (10) according to an embodiment of the present invention is implemented in a mirrorless manner and can be implemented with a size similar to or the same as the screen displayed on the windshield and the display panel that creates the image. Accordingly, a larger size display panel is required, and visible light of high brightness can be output.

[0052] FIG. 2 is a drawing referenced to explain the configuration of a head-up display device according to an embodiment of the present invention.

[0053] Referring to the drawing, the device (10) may include a bottom plate (100), a printed circuit board (20), a supporter (200), a lens part (500), a side frame (300), a first diffuser (610), a DTF sheet (711), a Fresnel sheet (712), a second diffuser (713), an LCD panel (714), a pad (620), a top case (740), a cover (750), a film (760), a panel printed circuit board (770), a driver printed circuit board (780), and a rear cover (790).

[0054] The bottom plate (100) can form the lower exterior of the device (10).

[0055] The bottom plate (100) can be formed to allow a plurality of parts constituting the device (10) to be seated.

[0056] The bottom plate (100) can perform a heat dissipation function. The bottom plate (100) can be formed of a metal material. The bottom plate (100) may include heat dissipation fins and may be implemented integrally with the heat dissipation fins.

[0057] The printed circuit board (20) may be named as a light-emitting element printed circuit board (20). The printed circuit board (20) may be named as a first printed circuit board to distinguish it from other printed circuit boards (770, 780).

[0058] The printed circuit board (20) can be placed on the bottom plate (100). The printed circuit board (20) can be placed inside the bottom plate (100).

[0059] A plurality of light-emitting elements arranged in a matrix form can be mounted on the printed circuit board (20). The light-emitting elements can be implemented as LEDs (light-emitting diodes).

[0060] Meanwhile, a matrix-type arrangement may mean that the rows and columns in which light-emitting elements are arranged are composed of multiple elements. That is, light-emitting elements can be arranged in multiple rows and multiple columns.

[0061] As light-emitting elements are arranged in a matrix form, images can be output without including a mirror, and by securing a sufficient amount of light required for image output, images can be output more clearly than conventional HUDs that include a mirror.

[0062] The supporter (200) can be placed on the bottom plate (100).

[0063] The supporter (200) can support the lens portion (500). The supporter (200) can be arranged in a manner that surrounds the lens portion (500).

[0064] The supporter (200) can support the lens part (500).

[0065] The supporter (200) can support the lens portion (500) between the side of the lens portion (500) and the bottom plate (100).

[0066] A portion of the supporter (200) may contact the lens portion (500) while in contact with the printed circuit board (20), and a portion may contact the bottom plate (100).

[0067] The supporter (200) may have a frame shape and may seat the lens portion (500) inside the frame. In this case, the lens portion (500) may come into contact with the printed circuit board (20) while being inserted into the frame.

[0068] The supporter (200) can form a seating portion (201). The seating portion (201) can seat the first diffuser (610).

[0069] The lens portion (500) can be placed on the printed circuit board (20).

[0070] The side of the lens portion (500) can be supported by a supporter (300).

[0071] The lens portion (500) is placed inside a frame-shaped supporter (200), and the first diffuser (610) is placed on the lens portion (500), and can be fixed by the side frame (300). By the side frame (300) pressing the supporter (200), the lens portion (500), and the first diffuser (610), the lens portion (500) can be firmly fixed.

[0072] The lens portion (500) may have a plurality of single lenses corresponding to each of the plurality of light-emitting elements arranged in a matrix form.

[0073] The lens portion (500) may include a first lens portion (510) and a second lens portion (502).

[0074] The first lens part (501) can be formed integrally with the second lens part (502).

[0075] The first lens portion (501) can be formed separately from the second lens portion (502).

[0076] The first lens part (501) can be placed on the printed circuit board (20).

[0077] The second lens part (502) can be placed on the first lens part (501).

[0078] The second lens portion (502) may be positioned with a gap formed between it and the first lens portion (501). In this case, the first lens portion (501) may not come into contact with the rear surface of the second lens portion (502).

[0079] The edge of the lens portion (500) can be pressed by the side frame (300). As the lens portion (500) is pressed by the side frame (300), it can be firmly fixed.

[0080] The lens portion (500) can form a path for incoming light. The lens portion (500) can diffuse light generated from a light-emitting element. The lens portion (500) can convert incoming light into parallel light.

[0081] The lens portion (500) may have a plurality of single lenses corresponding to each of the plurality of light-emitting elements arranged in a matrix form.

[0082] The first lens section (501) may have a plurality of single lenses corresponding to each of the plurality of light-emitting elements arranged in a matrix form.

[0083] The second lens section (502) may have a plurality of single lenses corresponding to each of the plurality of light-emitting elements arranged in a matrix form.

[0084] The side frame (300) can be placed on the lens portion (500). The side frame (300) can be placed on the first diffuser (610).

[0085] The side frame (300) can press the lens portion (500).

[0086] The side frame (300) can press the first diffuser (610).

[0087] The side frame (300) can provide a gap between the lens portion (500) and the LCD panel (714). Here, the gap may be an air gap.

[0088] The side frame (300) can provide a structure in which an LCD panel (714) is mounted. The side frame (300) can provide a structure in which a DTF sheet (711), a Fresnel sheet (712), and a second diffuser (713) are mounted between the lens portion (500) and the LCD panel (714). The side frame (300) can provide a mounting structure in which the LCD panel (714) and other optical components (711, 712, 713) are arranged in layers so as not to come into contact with each other.

[0089] The side frame (300) can perform a heat dissipation function. The side frame (300) is formed of a metal material and can release heat received from the bottom plate (100) by contacting the bottom plate (100).

[0090] The first diffuser (610) can be placed on the lens portion (500).

[0091] The edge of the first diffuser (610) can be pressed by the side frame (300).

[0092] The first diffuser (610) can diffuse the incoming light.

[0093] According to the embodiment, the first diffuser (610) may be omitted.

[0094] The DTF sheet (711) can be seated in a seat provided on the side frame (300).

[0095] The DTF sheet (711) can be placed on the lens portion (500) with a gap in between. The DTF sheet (711) can be placed on the first diffuser (610) with a gap in between. Here, the gap can be provided by the structure of the side frame (300) as an air gap.

[0096] The DTF sheet (711) can change the light emission angle. The DTF sheet (711) can change the angle of the output light relative to the incoming light.

[0097] The Fresnel sheet (712) can be seated in a seat provided on the side frame (300).

[0098] The Fresnel sheet (712) can be placed on the DTF sheet (711) with a gap in between. Here, the gap is an air gap and can be provided by the structure of the side frame (300).

[0099] The Fresnel sheet (712) can change the light emission angle. The Fresnel sheet (712) can change the angle of the light output relative to the light entering.

[0100] The second diffuser (713) can be seated in a seat provided on the side frame (300).

[0101] The second diffuser (713) can be placed on the Fresnel sheet (712) with a gap in between. Here, the gap is an air gap and can be provided by the structure of the side frame (300).

[0102] The second diffuser (713) can diffuse the incoming light.

[0103] Meanwhile, according to the embodiment, at least one of the DTF sheet (711), Fresnel sheet (712) and second diffuser (713) may be omitted.

[0104] The LCD panel (714) can be seated on a mounting portion provided in the side frame (300).

[0105] The LCD panel (714) can be placed on the second diffuser (713) with a gap in between. Here, the gap is an air gap and can be provided by the structure of the side frame (300).

[0106] Meanwhile, the LCD panel (714) can be placed on the lens portion (500) with a gap in between. Here, the gap is an air gap and can be provided by the structure of the side frame (300).

[0107] The LCD panel (714) can perform the function of driving an image.

[0108] The pad (620) can absorb shocks applied to the components between the components of the device (100) and prevent damage to the components.

[0109] The pad (620) may include a first pad (621), a second pad (622), a third pad (623), and a fourth pad (624). According to an embodiment, at least one of the pads (620) may be omitted.

[0110] The first pad (621) can be named a side frame pad.

[0111] The first pad (621) can be placed between the side frame (300) and the lens portion (500). The first pad (621) can absorb the impact applied to the lens portion (500) when the side frame (300) presses the lens portion (500) and prevent damage to the lens portion (500).

[0112] The first pad (621) can be placed between the side frame (300) and the first diffuser (610). The first pad (621) can absorb the impact applied to the first diffuser (610) when the side frame (300) presses the first diffuser (610) and prevent damage to the first diffuser (610).

[0113] The second pad (622) can be named the glass side pad.

[0114] The second pad (622) can absorb impact applied to the side of the LCD panel (714) and prevent damage to the side of the LCD panel (714).

[0115] The second pad (622) can be placed at the corner of the mounting portion on the side frame (300) where the LCD panel (714) is mounted. With the second pad (622) placed on the mounting portion, the LCD panel (714) can be placed on the second pad (622).

[0116] The third pad (623) can be named a Fresnel pad.

[0117] The third pad (623) can absorb the impact applied to the Fresnel sheet (712) and prevent damage to the Fresnel sheet (712).

[0118] The third pad (623) can be placed on the edge of the seating portion of the side frame (300) where the Fresnel sheet (712) is seated. With the third pad (623) placed on the seating portion, the Fresnel sheet (712) can be placed on the third pad (623).

[0119] The fourth pad (624) can be named a glass pad.

[0120] The fourth pad (624) can prevent damage caused by the seating of the LCD panel (714).

[0121] The fourth pad (624) can be placed on the side portion of the mounting portion of the side frame (300) where the LCD panel (714) is mounted. With the fourth pad (624) placed on the mounting portion, the LCD panel (714) can be placed on the fourth pad (624).

[0122] The top case (740) can be placed on the LCD panel (714).

[0123] The top case (740) can press the LCD panel (714). The top case (740) can fix the LCD panel (714).

[0124] The top case (740) can be combined with the side frame (300).

[0125] Meanwhile, a pad may be placed at the part where the top case (740) and the LCD panel (714) come into contact to prevent damage to the LCD panel (714).

[0126] The cover (750) can be named a dust cover.

[0127] The cover (750) can be placed on top of the top case (740).

[0128] The cover (750) can secure the film (760).

[0129] The film (760) can be named a dust cover film (760).

[0130] The film (760) can process external light. The film (760) can reflect external light.

[0131] The film (760) can transmit light output from inside the device (10).

[0132] The panel printed circuit board (770) is electrically connected to the LCD panel (714) and can drive the LCD panel (714).

[0133] The driver printed circuit board (780) is electrically connected to the printed circuit board (20) and can drive the light-emitting element.

[0134] The rear cover (790) can form part of the exterior of the device (10).

[0135] The rear cover (790) can protect the components of the device (10). For example, the rear cover (790) can protect the driver printed circuit board (780).

[0136] FIG. 3 is a drawing referenced to explain a bottom plate according to an embodiment of the present invention.

[0137] FIG. 4 is a drawing referenced to explain a supporter and a bottom plate according to an embodiment of the present invention.

[0138] FIG. 5 is a top view of some components of a mirrorless head-up display device according to an embodiment of the present invention.

[0139] FIG. 6 is a drawing referenced to explain a side frame according to an embodiment of the present invention.

[0140] Figure 7 is a cross-sectional view of A-A' in Figure 1.

[0141] Figure 8 is a cross-sectional view of B-B' in Figure 1.

[0142] Referring to the drawing, the printed circuit board (20) may have a plurality of light-emitting elements arranged in a matrix form.

[0143] Meanwhile, a matrix-type arrangement may mean that the rows and columns in which light-emitting elements are arranged are composed of multiple elements. That is, light-emitting elements can be arranged in multiple rows and multiple columns.

[0144] A plurality of light-emitting elements can be driven according to an electrical signal provided by a driver printed circuit board (780).

[0145] When multiple light-emitting elements are driven, heat is generated. Since multiple light-emitting elements are arranged in a matrix form on the printed circuit board (20), a heat dissipation device that can be applied to the entire printed circuit board (20) is required. That is, a heat dissipation device is required that can manage heat generation from light-emitting elements arranged on the sides of the printed circuit board (20) as well as from light-emitting elements arranged in the center.

[0146] The printed circuit board (20) can come into contact with the base plate (110).

[0147] A printed circuit board (20) may have a plurality of light-emitting elements arranged in a matrix form mounted thereon.

[0148] The bottom plate (100) can come into contact with the printed circuit board (20). The bottom plate (100) can be formed of a metal material.

[0149] A plurality of light-emitting elements are arranged on the upper surface of the printed circuit board (20), and since the lower surface of the printed circuit board (20) is in contact with the bottom plate (100), heat generated from the printed circuit board (20) can be transferred to the bottom plate (100). In this case, heat is transferred to the bottom plate (100) not only from the sides of the printed circuit board (20) but also from the center, so the bottom plate (100) can perform heat management for the entire printed circuit board (20).

[0150] The bottom plate (100) may include a base plate (110), a first heat sink (120), and a side wall (130).

[0151] The base plate (110) can be divided into an upper surface and a lower surface.

[0152] The upper surface of the base plate (110) can come into contact with the printed circuit board (20).

[0153] A first heat sink (120) can be formed on the lower surface of the base plate (110).

[0154] The base plate (110) can receive heat from the printed circuit board (20).

[0155] The base plate (110) can transfer the received heat to the first heat sink (120).

[0156] The shape of the base plate (110) can be determined according to the shape of the printed circuit board (20). For example, if the printed circuit board (20) is rectangular, the base plate (110) may be rectangular.

[0157] The first heat sink (120) can release heat received from the printed circuit board (20).

[0158] The first heat sink (120) may be formed to extend downward from the lower surface of the base plate (110). The first heat sink (120) may be implemented in the form of a heat dissipation fin.

[0159] The side wall (130) can be formed to extend upward from the base plate (110).

[0160] The side wall (130) can be formed to extend upward from each edge of the base plate (110).

[0161] When the base plate (110) has a rectangular shape, the side wall (130) may be composed of first to fourth side walls (131, 132, 133, 134). In this case, the first to fourth side walls (131, 132, 133, 134) may be formed on each edge of the rectangular base plate (110).

[0162] Meanwhile, the base plate (110), the first heat sink (120), and the side wall (130) may be formed integrally. That is, the first heat sink (120) may be formed integrally with the base plate (110) and the side wall (130).

[0163] The side wall (130) can support the printed circuit board (20). The side wall (130) can restrain the printed circuit board (20) so that it does not move up, down, left, or right while the printed circuit board (20) is seated on the base plate (110).

[0164] The side wall (130) can be placed between the side frame (300) and the side of the printed circuit board (20).

[0165] The lens portion (500) can be placed on the printed circuit board (20).

[0166] The lens portion (500) can form a light path for light generated from a light-emitting element.

[0167] The lens portion (500) may have a plurality of single lenses corresponding to each of the plurality of light-emitting elements arranged in a matrix form.

[0168] The device (10) may include a first optical component (380) and a second optical component (390).

[0169] The first optical component (380) can be placed on the bottom plate (100).

[0170] The first optical component (380) can be placed below the optical gap (OS).

[0171] The first optical component may include a lens portion (500) and a first diffuser (610).

[0172] The second optical component (390) can be positioned while maintaining an optical gap (OS) with the first optical component.

[0173] The second optical component (390) can be placed above the optical gap (OS).

[0174] The second optical component (390) may be positioned spaced apart from the first optical component (380) with a space between them due to the shape of the side frame (300). Here, the space may be described as an optical gap or an air gap.

[0175] The second optical component (390) may include a DTF sheet (711), a Fresnel sheet (712), a second diffuser (713), and an LCD panel (714).

[0176] The supporter (200) can support the lens portion (500).

[0177] The supporter (200) can support the lens portion (500) between the lens portion (500) and the side wall (130).

[0178] The supporter (200) may have a frame shape that forms a cavity inside. The frame may be determined by the shape of the lens portion (500). For example, if the lens portion (500) has a rectangular shape, the frame may have a rectangular shape.

[0179] The supporter (200) may include an inner part (210) and an outer part (220).

[0180] The inner portion (210) can be described as a part forming the inner side of the frame. The inner portion (210) may be composed of a first surface facing the lens portion (500) and a second surface facing the cavity (C) when the supporter (200) is attached.

[0181] The inner portion (210) may be positioned at an angle. The lower part of the inner portion (210) may be positioned at an angle such that it contacts the lower part of the lens portion (210) and moves further away from the lens portion (210) as it goes upward.

[0182] Due to the inner part (210) and the cavity (C), the supporter (200) is able to support the lens part (500) when the lens part (500) is inserted into the inside of the frame.

[0183] The cavity (C) formed inside the frame can form a larger space as it approaches the base plate (110).

[0184] The supporter (200) can support the lens portion (500) by the force with which the inner portion (210) pushes the lens portion (500). Here, the force may be based on the restoring force of the material forming the supporter (200). The inner portion (210) can restrain the lens portion (500) when the lens portion (500) is coupled into the inside of the frame.

[0185] Meanwhile, the supporter (200) may be formed of a material similar to or the same as the material of the lens portion (500). For example, the supporter (200) may be formed of polycarbonate.

[0186] A supporter (200) formed of the same material as the lens portion (500) undergoes thermal expansion at high temperatures to the same degree as the lens portion (500), thereby enabling the maintenance of the optical path alignment of the lens portion (500). The supporter (200) fixes the lens portion (500) and expands together with the lens portion (500) in a high-temperature environment, thereby ensuring the reliability of the lens portion (500).

[0187] The supporter (200) can fix and assemble the lens part (500) to minimize the gap in the lateral direction of the lens part (500), and by moving the supporter (200) and the lens part (500) together, the lens part (500) can be fixed even against vibrations and shocks caused by external factors.

[0188] The supporter (200) may include a corner portion (230) that fits with a guide (540) formed to protrude outwardly from the corner portion of the lens portion (500).

[0189] The outer portion (220) can be described as a part forming the outer side of the frame. The outer portion (220) may be composed of a first surface facing the cavity (C) and a second surface in contact with the side wall (130) when the supporter (200) is attached.

[0190] The side frame (300) can be placed on the bottom plate (100). The side frame (300) can be placed on the printed circuit board (20).

[0191] The side frame (300) can press the first optical component (380) toward the bottom plate (100). The side frame (300) can fix the first optical component (380) and prevent changes in the optical path caused by bending of the first optical component. As a result, reliability of the device (10) can be ensured.

[0192] The side frame (300) may provide a space (OS) that separates the second optical component (390) from the first optical component (380). The space (OS) may be described as an optical gap.

[0193] The side frame (300) can provide an optical gap (OS) between the first optical component (380) and the second optical component (390). The side frame (300) is formed of a metal material and can provide a constant optical gap (OS) while maintaining the rigidity of the device (10).

[0194] The side frame (300) may include a mounting portion (310). A second optical component (390) may be mounted on the mounting portion (310).

[0195] The seating portion (310) may include a first seating portion (311), a second seating portion (312), a third seating portion (313), and a fourth seating portion (314).

[0196] The first mounting portion (311) can accommodate a DTF sheet (711).

[0197] The second mounting portion (312) can accommodate a Fresnel sheet (712).

[0198] The third mounting portion (313) can accommodate a diffuser sheet (713). Here, the diffuser sheet (713) may be a second diffuser.

[0199] The fourth mounting portion (314) can accommodate an LCD panel (714).

[0200] The fourth seating portion (314) may be formed in layers with the first seating portion (311), the second seating portion (312), and the third seating portion (313).

[0201] Since the first to fourth seating portions (311, 312, 313, 314) are formed to be layered with each other, a gap can be maintained between the sheets seated in each seating portion. As a result, collision between the sheets can be prevented even when vibration occurs, and egg mura between the sheets can be prevented.

[0202] The side frame (300) can provide a space separating the LCD panel (714) from at least one of the diffuser sheet (713), Fresnel sheet (712), and DTF sheet (711).

[0203] The side frame (300) can be formed of a metal material.

[0204] The side frame (300) can come into contact with at least a portion of the bottom plate (100).

[0205] The side frame (300) can be in contact with the side wall (130). While in contact with the side frame (300), the side wall (130) can transfer heat received from the printed circuit board (20) to the side frame (300).

[0206] The side frame (300) can receive heat by contacting the bottom plate (100).

[0207] The side frame (300) may include a second heat sink (320). The second heat sink (320) may be formed to extend in a direction different from that of the first heat sink (120).

[0208] The first heat sink (120) may be formed extending downward in the direction of the device (10), and the second heat sink (320) may be formed extending sideways in the direction of the device (10).

[0209] Meanwhile, the second heat sink (320) can be formed extending outward at a point where an optical gap is formed inside.

[0210] The second heat sink (320) can release heat received from the bottom plate (100).

[0211] Meanwhile, the bottom plate (100) and the side frame (300) are formed of a metal material to maintain rigidity and protect the parts of the device (10) placed inside. Additionally, the bottom plate (100) and the side frame (300) each include a heat sink to dissipate heat generated inside.

[0212] FIG. 9 is a drawing referenced to explain a spacing member according to an embodiment of the present invention.

[0213] FIG. 10 is a drawing referenced to explain a spacing member according to an embodiment of the present invention.

[0214] FIG. 11 is an enlarged view of a portion of FIG. 3.

[0215] Referring to the drawing, the device (10) may include a spacing member (510, 520).

[0216] The spacing member (510, 520) can maintain the distance between a plurality of light-emitting elements and a plurality of single lenses.

[0217] The gap maintaining part (510, 520) can prevent damage to the light-emitting element caused by contact between the light-emitting element and the lens part (500) that may occur due to vibration or shock caused by external factors.

[0218] Due to the spacing maintenance part (510, 520), the spacing between the light-emitting element and the lens part (500) can be maintained at a constant level, thereby ensuring the reliability of the device (10).

[0219] As illustrated in FIG. 5, the spacing portion (510) can be formed integrally with the lens portion (500) on the rear surface of the lens portion (500).

[0220] The spacing portion (510) can be formed with a plurality of protruding lines that intersect each other to surround each of the plurality of light-emitting elements.

[0221] The grid structure (510) can form a plurality of unit spaces (511) corresponding to the number of light-emitting elements by contacting the printed circuit board (20). In this case, each of the plurality of light-emitting elements can be located within the plurality of unit spaces.

[0222] Meanwhile, a plurality of protruding lines can guide light generated from each of the plurality of light-emitting elements. The plurality of protruding lines can guide light so that the light generated from each of the plurality of light-emitting elements flows into a unit lens assigned to each of the light-emitting elements.

[0223] As illustrated in FIG. 6, the spacing member (520) can be implemented as a plurality of pads (520) disposed between a plurality of light-emitting elements.

[0224] The spacing between multiple pads can be gradually narrowed toward the center of the printed circuit board (20).

[0225] The edge of the lens portion (500) is supported by the printed circuit board (20) and the side frame (300), so that the closer to the edge of the lens portion (500), the smaller the degree of downward sagging of the lens portion (500), and the closer to the center of the lens portion (500) or the printed circuit board (20), the greater the degree of downward sagging of the lens portion (500). The spacing between the multiple pads gradually narrows toward the center of the lens portion (500) or the printed circuit board (20), thereby maintaining the posture of the lens portion (500).

[0226] FIGS. 12 and 13 are drawings referenced to explain a lens portion according to an embodiment of the present invention.

[0227] Referring to the drawing, the lens portion (500) may include a first lens portion (501) and a second lens portion (502).

[0228] The first lens section (501) may have a plurality of unit lenses (501U) arranged in a matrix form.

[0229] The first lens part (501) can diffuse light output from a plurality of light-emitting elements (21).

[0230] The first lens portion (501) may include a flange portion (531 in FIG. 11) that protrudes toward the second lens portion (502) to secure a gap with the second lens portion (502). The height of the flange portion (531) may be greater than the height of the unit lenses (501U) included in the first lens portion (501).

[0231] The second lens section (502) may have a plurality of unit lenses (502U) arranged in a matrix form.

[0232] The second lens part (502) can convert light transmitted through the first lens part (501) into parallel light.

[0233] The first lens portion (501) may be formed integrally with the second lens portion (502). The lens portion (500), in which the first lens portion (501) and the second lens portion (502) are formed integrally, may be produced through direct processing. The first lens (501) and the second lens (502) may be implemented through injection molding.

[0234] The device (10) may further include an optical sheet. Here, the optical sheet may be the first diffuser (610) described above.

[0235] The optical sheet (610) can be placed on the second lens portion (502). The optical sheet (610) can be placed on a mounting portion (201 in FIG. 7) provided in the supporter (200).

[0236] The second lens portion (502) may include a flange portion (532 in FIG. 11) that protrudes toward the optical sheet (610) to secure a gap with the optical sheet (610). The height of the flange portion (532) may be greater than the height of the unit lenses (502U) included in the second lens portion (502).

[0237] The lens portion (500) may include a guide (540) that is formed to protrude outwardly at the corner portion.

[0238] The guide (540) can be described as a medium formed to fit with the corner portion (230) of the supporter (200) and to firmly connect the lens portion (500) to the supporter (200).

[0239] The foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

Claims

1. A printed circuit board on which a plurality of light-emitting elements arranged in a matrix form are mounted; and A metal bottom plate in contact with the printed circuit board; comprising The above bottom plate is, A mirrorless head-up display device comprising: a first heat sink that emits heat received from the above printed circuit board.

2. In Paragraph 1, The above bottom plate is, A mirrorless head-up display device further comprising a side wall supporting the above-mentioned printed circuit board.

3. In Paragraph 2, A mirrorless head-up display device further comprising a side frame in contact with at least a portion of the bottom plate.

4. In Paragraph 3, The above side wall is, A mirrorless head-up display device that transmits heat received from the printed circuit board to the side frame while in contact with the side frame.

5. In Paragraph 4, The above side frame is, A mirrorless head-up display device comprising a second heat sink formed extending in a different direction from the first heat sink.

6. In Paragraph 4, The above side wall is, A mirrorless head-up display device positioned between the side frame and the side of the printed circuit board.

7. In Paragraph 2, The above bottom plate is, It further includes a base plate whose upper surface contacts the printed circuit board, and The above first heatsink is, A mirrorless head-up display device extending downward from the lower surface of the base plate.

8. In Paragraph 7, The above side wall is, A mirrorless head-up display device extending upward from the base plate.

9. In Paragraph 8, The above first heatsink is, A mirrorless head-up display device formed integrally with the base plate and the side wall.

10. In Paragraph 2, A lens portion disposed on the above printed circuit board; and A mirrorless head-up display device further comprising a supporter that supports the lens portion between the lens portion and the side wall.

11. In Paragraph 10, The above supporter is, A mirrorless head-up display device having a frame shape that forms a cavity inside.

12. In Paragraph 10, A mirrorless head-up display device further comprising a side frame that presses the lens portion toward the bottom plate.

13. In Paragraph 12, It further includes an LCD panel positioned while maintaining the above-mentioned lens portion and an optical gap; The above side frame is, A mirrorless head-up display device comprising a mounting portion on which an LCD panel is mounted.

14. In Paragraph 12, The above side frame is, A mirrorless head-up display device that receives heat by contacting the bottom plate above.

15. In Paragraph 14, The above side frame is, A mirrorless head-up display device including a heat sink that emits heat received from the bottom plate.

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