Head-up display

Abstract

A head-up display according to the present embodiment may comprise: a display panel; a sunlight reflection module adhered to the display panel; and a reflection mirror spaced apart from the sunlight reflection module and reflecting an image transmitted through the sunlight reflection module onto a windshield. The sunlight reflection module may include a reflective polarizing film that transmits first linearly polarized light emitted from the display panel and reflects second linearly polarized light in the sunlight. A polarization direction of the second linearly polarized light may be orthogonal to a polarization direction of the first linearly polarized light.

Description

Head-up display

[0001] The present invention relates to a head-up display that can be installed in a vehicle.

[0002] A head-up display is a device equipped in a vehicle that emits image light toward the vehicle's windshield. Automotive head-up displays can display various information, including driving information, while the vehicle is in motion.

[0003] A head-up display includes a display panel that generates and outputs image light, and at least one mirror that reflects the image light generated from the display panel.

[0004] Image light generated from the display panel can be incident on the vehicle's windshield by the mirror, and the occupant can perceive a virtual image of the position in front of the windshield.

[0005] Head-up displays are gradually increasing in number and becoming larger for the safety and convenience of passengers.

[0006] If the solar energy incident on the head-up display is high, the temperature of the display panel rises, causing the display panel to malfunction.

[0007] Japanese Patent Publication No. 4114194 (published July 9, 2006) discloses a head-up display device capable of limiting the temperature rise of a liquid crystal display element by using a reflective polarizing film. The liquid crystal display element comprises a liquid crystal cell in which liquid crystal is enclosed in a pair of light-transmitting substrates, a front polarizing plate in which the polarization direction is in the Y-axis direction, and a rear polarizing plate in which the polarization direction is in the X-axis direction. The reflective polarizing film is attached to a glass substrate spaced apart from the front of the liquid crystal display element and is oriented in the Y-axis direction and reflects light in the X-axis direction.

[0008] The present embodiment provides a head-up display that is easy to manufacture and can minimize energy incident into the interior of the display panel by reflecting the polarization component of sunlight.

[0009] A head-up display according to the present embodiment may include a display panel; a solar reflection module attached to the display panel; and a reflective mirror spaced apart from the solar reflection module and reflecting an image transmitted through the solar reflection module to a windshield.

[0010] The solar reflection module may include a reflective polarizing film that transmits a first linearly polarized light emitted from a display panel and reflects a second linearly polarized light among the sunlight.

[0011] The polarization direction of the second linear polarization may be orthogonal to the polarization direction of the first linear polarization.

[0012] The first linear polarization may be S-wave linear polarization, the second linear polarization may be P-wave linear polarization, and the reflective polarizing film may reflect P-wave linear polarization.

[0013] An example of a solar reflective module may include a reflective polarizing film and glass adhered to the emission surface of a display panel. The reflective polarizing film may be laminated to the glass. The material of the glass may be aluminum oxide.

[0014] Another example of a solar reflector module may include a reflective polarizing film; and a diffuser laminated to the reflective polarizing film. The reflective polarizing film may be laminated to a display panel. A head-up display including another example of a solar reflector module may further include glass bonded to the incident surface of the display panel. The material of the glass may be aluminum oxide.

[0015] Another example of a solar reflective module may include a reflective polarizing film; a diffuser laminated to the reflective polarizing film; and a glass laminated to the diffuser. The material of the glass may be aluminum oxide.

[0016] The reflective mirror may include a first reflective mirror that is spaced apart from the solar reflective module and reflects an image transmitted through the solar reflective module; and a second reflective mirror that reflects the image reflected by the first reflective mirror to a windshield.

[0017] A cold mirror coating that transmits infrared rays of sunlight can be formed on the first reflective mirror.

[0018] A head-up display may further include a light source that generates light; a holder bottom having a first opening through which the light generated from the light source is transmitted; and a holder top having a space formed therein for accommodating a display panel and a solar reflection module, and a second opening through which an image transmitted through the solar reflection module is transmitted may be formed in the holder top.

[0019] According to the present embodiment, a reflective polarizing film of a solar reflection module attached to a display panel reflects the polarization component of sunlight, thereby minimizing the temperature rise of the display panel caused by the polarization component of sunlight.

[0020] In addition, manufacturing may be easier when a solar reflection module containing a reflective polarizing film is attached to a reflective mirror.

[0021] In addition, a solar reflection module including a reflective polarizing film is attached to the display panel, allowing the head-up display to be made as compact as possible.

[0022] In addition, the glass attached to the display panel can increase the thermal capacity of the display panel assembly, thereby reducing the time it takes for the display panel to rise in temperature due to sunlight.

[0023] In addition, the diffuser plate can diffuse sunlight reflected from the reflective polarizing film to minimize reflection into the occupant's eyes and minimize glare for the occupant.

[0024] In addition, the cold mirror coating formed on the first reflective mirror can transmit infrared rays of sunlight and minimize the incidence of infrared rays of sunlight on the solar reflection module and display panel.

[0025] FIG. 1 is a drawing showing a head-up display according to the present embodiment,

[0026] FIG. 2 is a figure showing the display panel and solar reflection module of the first example of a head-up display according to the present embodiment,

[0027] FIG. 3 is an exploded perspective view showing a first example of a head-up display according to the present embodiment,

[0028] FIG. 4 is a figure showing the display panel and solar reflection module of the second example of a head-up display according to the present embodiment,

[0029] FIG. 5 is a figure showing the display panel and solar reflection module of the third example of a head-up display according to the present embodiment,

[0030] Figure 6 is a graph comparing the temperature change of the display panel of the head-up display according to the present embodiment with the temperature change of the display panel of the comparative example.

[0031] Specific embodiments of the present invention will be described in detail below with reference to the drawings.

[0032] FIG. 1 is a diagram showing a head-up display according to the present embodiment, FIG. 2 is a diagram showing a display panel and a solar reflection module of a first example of a head-up display according to the present embodiment, and FIG. 3 is an exploded perspective view showing a first example of a head-up display according to the present embodiment.

[0033] The head-up display is positioned on the dashboard of the vehicle and can emit linearly polarized light toward the vehicle's windshield (WS), allowing the occupant to perceive a virtual image in front of the windshield (WS).

[0034] The dashboard can be the vehicle's instrument panel (IP), and the head-up display can be placed inside the dashboard.

[0035] The windshield (WS) can reflect light from the head-up display to the eye box (EB) to allow the occupant to see a virtual image. The eye box (EB) can be defined as an area representing the movement of the occupant's gaze.

[0036] The head-up display may include a light source (1); a display panel (2); a solar reflection module (3); and a reflective mirror (4).

[0037] The light source (1) can generate light.

[0038] The light source (1) may be a backlight unit (BLU) capable of emitting light toward a display panel (2). The light source (1) may be an LED, an OLED, etc.

[0039] A light source (1), a display panel (2), and a solar reflection module (3) can form a picture generating unit (PGU; Picture Generating Unit) that generates an image and emits it to a reflective mirror (4).

[0040] The display panel (2) can emit image light toward the solar reflection module (3). The display panel (2) may be an image generating unit and may be a display device capable of generating image light by controlling electrical signals, such as an LCD (Liquid Crystal Display) panel, an LED (Light Emitting Diode) panel, or an OLED (Organic Light Emitting Diode) panel.

[0041] The display panel (2) may include an LCD panel (21) and a pair of polarizers (22)(23) placed on the LCD panel (21).

[0042] The LCD panel (21) can be a liquid crystal cell.

[0043] A pair of polarizers (22)(23) may include a first polarizer (22) facing the light source (1) and a second polarizer (23) facing the solar reflection module (3).

[0044] The first polarizer (22) and the second polarizer (23) can be spaced apart from each other with the LCD panel (21) in between.

[0045] One of the light source (1) and the display panel (2) can emit linearly polarized light in a first direction. One of the light source (1) and the display panel (2) may include a linear polarizer that linearly polarizes light into first linearly polarized light in a first direction.

[0046] For example, the second polarizer (23) may be a linear polarizer.

[0047] The display panel (2) may include an incident surface (24) and an exit surface (25).

[0048] The incident surface (24) may be a surface of the display panel (2) facing the light source (1). The incident surface (24) may be formed on the first polarizer (22).

[0049] The emission surface (25) may be a surface of the display panel (2) facing the solar reflection module (3). The emission surface (25) may be formed on the second polarizer (23).

[0050] An image of the first linear polarization can be emitted from the display panel (2). The first linear polarization may be S-wave linear polarization (S-wave component).

[0051] S-wave linear polarization can pass through the solar reflection module (3).

[0052] The solar reflection module (3) can be attached to the display panel (2). The display panel (2) and the solar reflection module (3) can form a display panel assembly.

[0053] A picture generating unit (PGU) may include a light source (1) that emits light toward a display panel assembly, and a display panel assembly that generates image light by the light emitted from the light source (1).

[0054] The solar reflection module (3) may include a reflective polarizing film (10; Reflective Polarizer).

[0055] The reflective polarizing film (10) may include a first surface (11) facing the display panel (2) and a second surface (12) located opposite the first surface (11).

[0056] The first surface (11) can face the output surface (25) of the display panel (2).

[0057] The second side (12) can face the opposite side of the display panel (2).

[0058] The second surface (12) can face the first reflective mirror (41) among the reflective mirrors (4).

[0059] The first linearly polarized light emitted from the display panel (2) can be transmitted through the reflective polarizing film (10), and the second linearly polarized light among the sunlight can be reflected by the reflective polarizing film (10).

[0060] The polarization direction of the second linear polarization may be orthogonal to the polarization direction of the first linear polarization.

[0061] The first linear polarization may be S-wave linear polarization (S-wave component), and the second linear polarization may be P-wave linear polarization (P-wave component).

[0062] S-wave linear polarization emitted from the display panel (2) can pass through the reflective polarizing film (10).

[0063] The reflective polarizing film (10) can reflect P-wave linear polarization (P-wave component) incident on the solar reflective film (10) from the outside.

[0064] Sunlight can be incident on the reflective polarizing film (10) from the outside of the reflective polarizing film (10), and P-wave linear polarization of the sunlight cannot pass through the reflective polarizing film (10) and can be reflected.

[0065] That is, P-wave linear polarization of sunlight cannot be incident on the display panel (2), and the display panel (2) may not be heated by P-wave linear polarization of sunlight.

[0066] The solar reflection module (3) may further include glass (20).

[0067] The glass (20) can be bonded to the display panel (2). The glass (20) can be bonded to the output surface (25) of the display panel (2).

[0068] The glass (20) can be bonded to the output surface (25) of the display panel (2) with a bond.

[0069] The glass (20) may include a bonding surface (26) bonded to the output surface (25) of the display panel (2).

[0070] The reflective polarizing film (10) can be laminated to glass (20).

[0071] The glass (20) may include a laminated surface (27) on which a reflective polarizing film (10) is laminated.

[0072] The laminated surface (27) may be the opposite side of the bonding surface (26).

[0073] The glass (20) attached to the display panel (2) can increase the thermal capacity of the display panel assembly, which is a combination of the display panel (2) and the solar reflection module (3).

[0074] The glass (20) can absorb heat from the display panel (2).

[0075] Examples of glass (20) materials may be soda lime or aluminum oxide.

[0076] It is desirable that the thermal conductivity of the glass (20) be high, and it is desirable that the material of the glass (20) be aluminum oxide. The glass (20) may be aluminum oxide glass.

[0077] When a solar reflection module (3) is attached to a display panel (2), manufacturing of the head-up display can be easy.

[0078] If the solar reflection module (3) is not attached to the display panel (2) but is attached to the curved surface of the reflective mirror (4), the process of attaching the solar reflection module (3) to the curved surface of the reflective mirror (4) may be complex and the manufacturing cost may increase.

[0079] On the other hand, if a solar reflection module (3) is attached to the display panel (2), the manufacturing time of the head-up display can be shortened, and the structure of the equipment for manufacturing the head-up display can be simple and low cost.

[0080] The following describes the reflective mirror (4).

[0081] The reflective mirror (4) can be spaced apart from the solar reflection module (3).

[0082] The reflective mirror (4) can reflect the image transmitted through the solar reflection module (3) to the windshield (WS).

[0083] An example of a reflective mirror (4) can be a concave mirror.

[0084] Multiple reflective mirrors (4) may be provided.

[0085] The reflective mirror (4) may include a first reflective mirror (41); and a second reflective mirror (42).

[0086] The first reflective mirror (41) may be spaced apart from the solar reflection module (3). The first reflective mirror (41) may reflect an image transmitted through the solar reflection module (3). The first reflective mirror (41) may be a concave mirror.

[0087] A cold mirror coating (43) can be formed on the first reflective mirror (41).

[0088] The cold mirror coating (43) can be formed on the side of the first reflective mirror (41) facing the solar reflection module (3).

[0089] Visible light from sunlight can be reflected to the solar reflection module (3) by the cold mirror coating (43).

[0090] Infrared rays from sunlight can pass through the cold mirror coating (43). When infrared rays from sunlight pass through the cold mirror coating (43), the thermal energy incident on the display panel (2) can be minimized.

[0091] The second reflective mirror (42) can reflect the image reflected by the first reflective mirror (41) to the windshield (WS). The second reflective mirror (42) may be a concave mirror.

[0092] The second reflective mirror (42) can have an aluminum coating formed on it.

[0093] As shown in FIG. 1, the head-up display may further include a housing (5).

[0094] The housing (5) can form the exterior of the head-up display.

[0095] The housing (5) can be positioned below the windshield (WS). The housing (5) can be accommodated within the dashboard. The housing (5) can be spaced apart from the windshield (WS) in the vertical direction (Z).

[0096] An inner space (51) may be formed inside the housing (5). An opening (52) may be formed at the top of the housing (5). The opening (52) may be formed on the upper surface of the housing (5) to be open in the vertical direction (Z).

[0097] A cover glass (53) may be placed in the opening (52).

[0098] The cover glass (53) can prevent foreign substances such as dust from penetrating into the inner space (51).

[0099] The housing (5) may be composed of a single member, or may be composed of a combination of multiple members.

[0100] The light source (1), the display panel (2), the solar reflection module (3), and the reflection mirror (4) can be accommodated in the inner space (51).

[0101] As shown in FIG. 3, the head-up display may further include a holder bottom (6); and a holder top (7).

[0102] The holder bottom (6) may have a first opening (61) formed therein.

[0103] Light generated from the light source (1) can pass through the first opening (61) and be incident on the incident surface (24) of the display panel (2).

[0104] The holder top (7) may have a space (71) formed therein for accommodating the display panel (2) and the solar reflection module (3).

[0105] A second opening (72) may be formed in the holder top (7).

[0106] The image transmitted through the solar reflection module (3) can pass through the second opening (72) and be incident on the reflection mirror (4).

[0107] A cushion tape (73) may be placed between the holder top (7) and the solar reflection module (3).

[0108] A display panel (2), a solar reflection module (3), a holder bottom (6), and a holder top (7) can form a display panel assembly.

[0109] The display panel assembly can be accommodated in the inner space (51) of the housing (1).

[0110] The temperature rise of the display panel (2) may be due to the temperature rise caused by the light source (1) and the temperature rise caused by sunlight.

[0111] The solar reflection module (3) and the cold mirror coating (43) can minimize the temperature rise caused by sunlight.

[0112] Sunlight is unpolarized and consists of various wavelengths. The ultraviolet rays of sunlight can be mostly blocked by the vehicle's windshield (WS), while the infrared rays and visible light of sunlight can enter the inner space (51) of the housing (1).

[0113] Infrared rays (SI) of sunlight can be reflected by the second reflective mirror (42) to the first reflective mirror (41) and can pass through the cold mirror coating (43), and the infrared rays (I) incident on the solar reflective module (3) and the display panel (2) can be minimized.

[0114] The visible light (SV) of sunlight may be in an unpolarized state, may be reflected by the second reflective mirror (42) to the first reflective mirror (41), and may be incident on the reflective polarizing film (10) by the first reflective mirror (41).

[0115] The P-wave component (SP) of sunlight can be reflected by the reflective polarizing film (10), and the reflective polarizing film (10) can reflect the energy of sunlight to the maximum extent to lower the temperature of the display panel (2).

[0116] FIG. 4 is a diagram showing the display panel and solar reflection module of the second example of a head-up display according to the present embodiment.

[0117] The solar reflection module (3') of the second example of a head-up display further includes a reflective polarizing film (10'); and a diffuser (30) laminated to the reflective polarizing film (10').

[0118] The reflective polarizing film (10') can be laminated to the display panel (2). The reflective polarizing film (10') can be laminated to the output surface (25) of the display panel (2).

[0119] The reflective polarizing film (10') may have other configurations and functions identical or similar to the reflective polarizing film (10) of the first example of a head-up display, except that it is laminated to the output surface (25) of the display panel (2), and a detailed description of the configurations and functions identical to the reflective polarizing film (10) of the first example of a head-up display is omitted.

[0120] The reflective polarizing film (10') may include a first surface (11') laminated to the output surface (25) of the display panel (2) and a second surface (12') facing the diffuser (30).

[0121] The diffuser (30) can be laminated to the reflective polarizing film (10). The diffuser (30) can be laminated to the second surface (12') of the reflective polarizing film (10').

[0122] The diffuser (30) may include a laminated surface (31) that is laminated to the second surface (12') of the reflective polarizing film (10').

[0123] The diffuser (30) may include a reflective mirror facing surface (32) facing the first reflective mirror (41).

[0124] The P-wave component of sunlight can be reflected outward by the reflective polarizing film (10') and scattered as it passes through the diffuser (30).

[0125] If the solar reflection module (3') includes only a reflective polarizing film (10') and does not include a diffuser (30), the P-wave linear polarization reflected from the reflective polarizing film (10') can be incident on the passenger's eyes through the first reflective mirror (41), the second reflective mirror (42), and the windshield (WS).

[0126] On the other hand, if the solar reflection module (3') includes a reflective polarizing film (10') and a diffuser (30), the P-wave linear polarization reflected from the reflective polarizing film (10') can be scattered as it passes through the diffuser (30), and glare to the occupant can be minimized.

[0127] A second example of a head-up display may further include glass (20') bonded to the incident surface (24) of the display panel (2).

[0128] The glass (20') can be spaced apart from the solar reflection module (3') with the display panel (2) in between. The glass (20') can be spaced apart from the reflective polarizing film (10') with the display panel (2) in between.

[0129] The glass (20') can be bonded to the incident surface (24) of the display panel (2).

[0130] The glass (20') can be placed between the incident surface (24) of the display panel (2) and the light source (1). The glass (20') can cover the incident surface (24) of the display panel (2).

[0131] The glass (20') can be bonded to the incident surface (24) of the display panel (2) with a bond.

[0132] The glass (20') may include a bonding surface (26') bonded to the incident surface (24) of the display panel (2).

[0133] The glass (20') may include a light source facing surface (27') facing the light source (1).

[0134] The light source facing surface (27') may be the opposite side of the bonding surface (26').

[0135] The display panel (2), the solar reflection module (3'), and the glass (20') can form a display panel assembly.

[0136] The display panel (2), the solar reflector module (3'), and the glass (20') may be arranged in the order of the glass (20'), the display panel (2), and the solar reflector module (3') in the direction in which light is emitted.

[0137] The glass (20') can increase the thermal capacity of the display panel assembly. The glass (20') can absorb the temperature of the display panel (2).

[0138] Examples of glass (20') materials may be soda lime or aluminum oxide.

[0139] It is desirable that the thermal conductivity of the glass (20') be high, and it is desirable that the material of the glass (20') be aluminum oxide. The glass (20') may be aluminum oxide glass.

[0140] Other components and functions other than the solar reflection module (3') and glass (20') may be identical or similar to the first example of a head-up display, and a detailed description thereof is omitted to avoid redundant descriptions.

[0141] FIG. 5 is a figure showing the display panel and solar reflection module of the third example of a head-up display according to the present embodiment.

[0142] The solar reflection module (3") of the third example of a head-up display may further include a reflective polarizing film (10'); a diffuser (30) laminated to the reflective polarizing film (10'); and a glass (20") laminated to the diffuser (30).

[0143] Other configurations and functions other than the solar reflection module (3") may be identical or similar to the second example of the head-up display, and a detailed description thereof is omitted to avoid redundant descriptions.

[0144] The composition and operation of the reflective polarizing film (10') may be identical or similar to the reflective polarizing film (10') of the second example of the head-up display, and below. For compositions identical to the reflective polarizing film (10') of the second example of the head-up display, the same reference numerals are used and descriptions thereof are omitted.

[0145] The configuration and operation of the diffuser (30) may be identical or similar to the diffuser (30) of the second example of the head-up display, and below, for configurations identical to the diffuser (30) of the second example of the head-up display, the same reference numerals are used and a detailed description thereof is omitted.

[0146] The diffuser (30) may be laminated to the glass (20). The diffuser (30) may include a laminated surface (32) that is laminated to the glass (20).

[0147] The glass (20) can be spaced apart from the reflective polarizing film (10') with the diffuser (30) in between.

[0148] The glass (20) may include a laminated surface (21) to which a diffuser (30) is laminated.

[0149] The glass (20) may include a reflective mirror opposite surface (22) facing the first reflective mirror (41).

[0150] The reflective mirror opposite surface (22) may be the opposite side of the laminated surface (21) and may be exposed to the outside.

[0151] The display panel (2) and the solar reflection module (3) can form a display panel assembly.

[0152] The glass (20) can increase the thermal capacity of the display panel assembly. The glass (20) can absorb the temperature of the display panel (2).

[0153] Examples of glass (20) materials may be soda lime or aluminum oxide.

[0154] It is desirable that the thermal conductivity of the glass (20) be high, and the material of the glass (20) be aluminum oxide. The glass (20) may be aluminum oxide glass.

[0155] The reflective polarizing film (10), diffuser (30), and glass (20) can be bonded to the display panel (2).

[0156] Figure 6 is a graph comparing the temperature change of the display panel of the head-up display according to the present embodiment with the temperature change of the display panel of the comparative example.

[0157] A shown in Fig. 6 is the temperature change of the display panel upon sunlight incidence when a reflective polarizing film and glass are bonded to the display panel.

[0158] B shown in Fig. 6 is the temperature change of the display panel when the reflective polarizing film and the glass are separated from the display panel.

[0159] When the reflective polarizing film and glass are attached to the display panel, the temperature of the display panel due to the incidence of sunlight is low, as shown in Fig. 6A, whereas when the reflective polarizing film and glass are separated from the display panel, the temperature of the display panel due to the incidence of sunlight is high, as shown in Fig. 6B.

[0160] For example, when 5 minutes have passed since sunlight began to be incident, the temperature of the display panel with the reflective polarizing film and glass bonded thereto is approximately 78°, whereas the temperature of the display panel separated from the reflective polarizing film and glass is approximately 84°.

[0161] That is, as in the present embodiment, when a reflective polarizing film and glass are bonded to a display panel, the rate of temperature rise of the display panel may be low.

[0162] In this embodiment, when sunlight is incident, the temperature of the display panel can be lowered within the guaranteed temperature securing time of the display panel (e.g., 5 to 7 minutes).

[0163] The above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention.

[0164] Accordingly, the embodiments disclosed in this invention are intended to explain, not limit, the technical concept of the invention, and the scope of the technical concept of the invention is not limited by these embodiments.

[0165] The scope of protection of the present invention shall be interpreted by the claims below, and all technical ideas within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

1. Display panel; A solar reflection module attached to the above display panel; and It includes a reflective mirror spaced apart from the solar reflection module and reflecting the image transmitted through the solar reflection module to the windshield, The above solar reflection module is It includes a reflective polarizing film that transmits a first linearly polarized light emitted from the display panel and reflects a second linearly polarized light among sunlight, and A head-up display in which the polarization direction of the second linear polarization is orthogonal to the polarization direction of the first linear polarization.

2. In Paragraph 1, The above first linear polarization is S-wave linear polarization, and The above second linear polarization is P-wave linear polarization, and The above-described reflective polarizing film is a head-up display that reflects the above-described P-wave linear polarization.

3. In Paragraph 1, The above solar reflection module further includes glass adhered to the emission surface of the display panel, and The above reflective polarizing film is a head-up display laminated to the above glass.

4. In Paragraph 3, A head-up display in which the material of the glass is aluminum oxide.

5. In Paragraph 1, The above solar reflection module further includes a diffuser laminated to the above reflective polarizing film, and The above reflective polarizing film is a head-up display laminated to the above display panel.

6. In Paragraph 5, A head-up display further comprising glass bonded to the incident surface of the above-mentioned display panel.

7. In Paragraph 6, A head-up display in which the material of the glass is aluminum oxide.

8. In Paragraph 5, The above solar reflection module is a head-up display comprising glass laminated with the above diffuser.

9. In Paragraph 8, A head-up display in which the material of the glass is aluminum oxide.

10. In Paragraph 1, The above-mentioned reflective mirror is a first reflective mirror that is spaced apart from the solar reflection module and reflects an image transmitted through the solar reflection module; It includes a second reflective mirror that reflects the image reflected by the first reflective mirror to the windshield, and A head-up display having a cold mirror coating formed on the first reflective mirror that transmits infrared rays of sunlight.

11. In Paragraph 1, A light source that generates light; A holder bottom having a first opening formed therein through which light generated from the light source passes; and It further includes a holder top in which a space is formed to accommodate the above-mentioned display panel and solar reflection module, and A head-up display having a second opening formed in the holder top through which an image transmitted through the solar reflection module is transmitted.

Images