On-vehicle display device

Abstract

To provide an on-vehicle display device that prevents fogging in area which receives a display light of a front glass in a concise structure.SOLUTION: An on-vehicle display device 100 comprises an indicator 10 which is located in a dashboard 2 of a vehicle 1 and emits a display light L representing a picture image, a cover glass 30 which covers the indicator 10 and a cylindrical body 20 which allows the display light L, emitted from the indicator 10 and transmitting the cover glass 30, to travel toward the front glass 3. There is formed on a cylindrical body 20 a blow port 21a which sends a defroster wind D which is wind by a defroster 50 in the cylindrical body 20. The cover glass 30 includes inclined plane 31 which receives the defroster wind D sent from the blow port 21a into the cylindrical body 20 and guides the defroster wind D toward the front glass 3 by the inclined plane 31.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an in-vehicle display device. [Background technology]

[0002] As an example of an in-vehicle display device, Patent Document 1 describes a device that is installed in the dashboard of a vehicle and emits display light representing an image toward the vehicle's windshield, allowing a user such as a driver to view the image. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 3-62085 Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of in-vehicle display device, it is necessary to provide an air outlet for blowing air from the defroster to the windshield at a position on the dashboard that is away from the opening through which the display light is emitted. However, this structure may not be able to adequately defog the area of ​​the windshield that receives the display light.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and has an object to provide an in-vehicle display device that can defog the area of ​​the windshield that receives display light with a simple configuration. [Means for solving the problem]

[0006] In order to achieve the above object, the in-vehicle display device according to the present disclosure comprises: an indicator located within a dashboard of the vehicle and emitting an indicator light representing an image; A cover glass covering the display; a cylindrical body that transmits the display light emitted from the display device and passing through the cover glass toward a windshield of the vehicle; The cylindrical body is formed with an air outlet for sending defroster wind, which is wind generated by a defroster, into the cylindrical body, The cover glass has an inclined surface that receives the defroster wind sent from the air outlet into the cylindrical body, and the inclined surface guides the defroster wind toward the windshield. Effect of the Invention

[0007] According to the present disclosure, it is possible to prevent fogging of the area of ​​the windshield that receives the display light with a simple configuration. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing a state in which an in-vehicle display device according to an embodiment of the present disclosure is mounted on a vehicle; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of the present disclosure will be described with reference to the drawings.

[0010] As shown in FIG. 1, the in-vehicle display device 100 of this embodiment is provided on a dashboard 2 (including an instrument panel) of a vehicle 1, and emits light representing an image (hereinafter, display light L) toward a ceramic forming portion 3a provided in the lower end region of a windshield 3 (windshield) of the vehicle 1.

[0011] The ceramic-formed portion 3a is a portion of the windshield 3 where black ceramic is formed by baking coating, and is commonly called a black ceramic portion. A reflective mirror surface that reflects the display light L toward the user 4 is formed on the inner surface of the ceramic-formed portion 3a of the windshield 3. The user 4 is, for example, the driver of the vehicle 1.

[0012] The ceramic-formed portion 3a may be provided on the inner surface (the surface facing the user 4) of the windshield 3, or on the outer surface of the windshield 3. In addition, when the windshield 3 is composed of a laminated glass of multiple pieces of glass, the ceramic-formed portion 3a may be provided inside the windshield 3.

[0013] The display light L reflected by the ceramic forming portion 3a proceeds toward the user 4. By placing his / her viewpoint within the eye box 5, the user 4 can visually recognize a virtual image of the image represented by the display light L. To the user 4, the image appears to be displayed on the ceramic forming portion 3a. The image indicates, for example, various information related to the vehicle 1 (hereinafter referred to as vehicle information). The vehicle information may include not only information about the vehicle 1 itself, but also external information about the vehicle 1, such as information about the surroundings of the vehicle 1.

[0014] The in-vehicle display device 100 includes a display 10, a cylindrical body 20, a cover glass 30, and a control unit 40.

[0015] 1 is a diagram showing a state in which an in-vehicle display device 100 is mounted on a vehicle 1. In the figure, colored parts other than a control unit 40, an image display area 10a described later, and a defroster 50, which are shown in schematic cross section, show the schematic cross sections of each component. In addition, in the figure, directions of the vehicle 1 are shown as forward Fd, backward Bd, upward Ud, and downward Dd. The directions of forward, backward, upward, and downward used in the following description follow the directions shown in the figure, unless otherwise specified.

[0016] The display 10 is composed of an LCD (Liquid Crystal Display), an organic EL (Electro-Luminescence) display, or the like, and is provided in the dashboard 2. The display 10 is capable of displaying an image showing vehicle information in an image display area 10a. In other words, the image display area 10a is a pixel formation area in the display 10, and is an area in which an image can be displayed. Display light L representing the image is emitted from the image display area 10a toward the windshield 3 (specifically, the ceramic formation portion 3a).

[0017] The cylindrical body 20 is formed, for example, by a part of the dashboard 2, and passes the display light L emitted from the display 10 and directed toward the windshield 3. In other words, the cylindrical body 20 is located between the display 10 and the windshield 3. Note that the cylindrical body 20 may be a member that is combined with the dashboard 2. The display 10 is located below the lower end of the cylindrical body 20, and emits the display light L into the cylindrical body 20. The upper end of the cylindrical body 20 forms an opening 20a that is a portion from which the display light L is emitted from the dashboard 2.

[0018] The cylindrical body 20 of this embodiment is formed in a rectangular cylindrical shape with its outer and inner circumferences being roughly rectangular. The cylindrical body 20 is located at the rear of the cylindrical body 20 and has an inner surface 21 that faces forward. The inner surface 21 is connected to a top surface 2a of the dashboard 2 of the vehicle 1.

[0019] An air outlet 21a is formed on the inner surface 21 of the cylindrical body 20 to send defroster wind D, which is wind from a defroster 50 mounted on the vehicle 1, into the cylindrical body 20. For example, the air outlet 21a opens toward the front of the vehicle 1.

[0020] A duct 51 is provided between the defroster 50 and the air outlet 21a, and the defroster wind D from the defroster 50 passes through the duct 51 and is sent from the air outlet 21a into the cylindrical body 20. The defroster wind D then passes from the air outlet 21a through the cylindrical body 20 to the windshield 3. In other words, the cylindrical body 20 is used not only as an optical path for the display light L, but also as a flow path for the defroster wind D. According to the in-vehicle display device 100, the cylindrical body 20 having such a simple configuration can be used to defog the area of ​​the windshield 3 that receives the display light L.

[0021] As shown in FIG. 1, the lower end of the air outlet 21a is located behind the upper end of the air outlet 21a. This positional relationship can prevent the image of the air outlet 21a from being reflected by the windshield 3 and being visually recognized by the user 4 (image reflection of the air outlet 21a). The shape and position of the air outlet 21a are arbitrary as long as they can prevent the image reflection of the air outlet 21a from occurring when the user 4 focuses his / her gaze on the eye box 5. For example, the inner surface 21 may be inclined so that the upper end of the inner surface 21 is located forward of the upper end of the air outlet 21a, thereby preventing the image reflection of the air outlet 21a. However, even in this case, it is preferable that the lower end of the air outlet 21a is located behind the upper end of the air outlet 21a.

[0022] The cylindrical body 20 is made of a light absorbing material such as black, or is configured by being subjected to a surface treatment to reduce reflection. This makes it possible to prevent stray light, such as sunlight reflected after entering the cylindrical body 20 and display light L reflected at places other than the ceramic formation portion 3a, from reaching the eye box 5.

[0023] The cover glass 30 is made of organic glass or inorganic glass, and is provided to cover the display 10. For example, the cover glass 30 is fixed to the display 10 by a transparent adhesive, covering the image display area 10a. The cover glass 30 covers the display 10 over an area larger than the image display area 10a. The cover glass 30 may be supported by a support (not shown) and provided at a distance from the display 10.

[0024] The display light L emitted from the display 10 passes through the cover glass 30 and the cylindrical body 20 to reach the windshield 3.

[0025] The cover glass 30 has an inclined surface 31 that receives the defroster wind D sent from the air outlet 21a into the cylindrical body 20, and the inclined surface 31 guides the defroster wind D toward the windshield 3. This makes it possible to efficiently direct the defroster wind D through the cylindrical body 20 toward the windshield 3, and also makes it possible to suppress accumulation of dust on the surface of the cover glass 30.

[0026] The inclined surface 31 has a first end E1 located on the side of the air outlet 21a and a second end E2 located further forward of the vehicle 1 than the first end E1, and is inclined so that the second end E2 is located higher than the first end E1. In order to prevent the defroster wind D sent from the air outlet 21a from stagnating in the cylindrical body 20, the inclined surface 31 is preferably a concavely curved inclined surface as shown in the figure. This allows the defroster wind D approaching the cylindrical body 20 from the display 10 to be smoothly sent out from the opening 20a without stagnating, thereby suppressing a decrease in the wind pressure of the defroster wind D and efficiently removing fog from the windshield 3.

[0027] In addition, in order to prevent deterioration of quality due to external light such as sunlight and scratches due to falling objects, the inclined surface 31 of the cover glass 30 may be subjected to surface treatment such as AR (Anti-Reflection), AG (Anti-Glare), AF (Anti-Fingerprint), etc. Furthermore, when sunlight is irradiated onto the inclined surface 31 of the cover glass 30, (i) a light collection point of the inclined surface 31 may be intentionally set so that the sunlight is not reflected and reaches the eye box 5 directly or via the windshield 3, or (ii) the shape of the inclined surface 31 may be set so that the sunlight is reflected to an area other than the eye box 5. The inclined surface 31 may be an inclined surface including a flat surface.

[0028] The cylindrical body 20 is provided with an edge cover portion 20b that covers the second end E2 of the cover glass 30. This edge cover portion 20b can prevent an image of the second end E2 from being reflected on the windshield 3 and being viewed by the user 4 (image reflection of the second end E2). The edge cover portion 20b may be formed integrally with the cylindrical body 20 as shown in the figure, or may be a separate body from the cylindrical body 20. Also, as shown in the figure, the upper end of the air outlet 21a is positioned so as to protrude further forward than the first end E1 of the cover glass 30. This structure can also prevent an image of the first end E1 from being reflected on the windshield 3 and being viewed by the user 4 (image reflection of the first end E1).

[0029] The control unit 40 is made up of a microcomputer that controls the display operation of the display device 10, and is implemented on a PCB (Printed Circuit Board) disposed in the dashboard 2, for example.

[0030] The defroster 50 is realized as one function of an HVAC (Heating Ventilating Air Conditioning) module mounted on the vehicle 1. The operation of the defroster 50 may be controlled by an ECU (Electronic Control Unit) (not shown) mounted on the vehicle 1, or may be controlled by the control unit 40.

[0031] The present invention is not limited to the above-described embodiment, modified examples, and drawings. Modifications (including the deletion of components) can be made as appropriate within the scope of the present invention.

[0032] The in-vehicle display device 100 may be a head-up display device that emits display light L toward a transparent region of the windshield 3 and displays a virtual image of an image represented by the display light L by the display light L reflected by the windshield 3. In this case, the display light L emitted from the display device 10 located inside the dashboard 2 may be (i) configured to directly reach the windshield 3, or (ii) configured to reach the windshield 3 after being reflected by one or more mirrors. In addition, when the in-vehicle display device 100 is configured as a head-up display device, the cylindrical body 20 may surround a part of the optical path of the display light L from the display device 10 to the windshield 3. In addition, the display device 10 does not have to be located below the cylindrical body 20.

[0033] In the above description, descriptions of well-known technical matters have been omitted as appropriate in order to facilitate understanding of the present disclosure.

[0034] Various embodiments and modifications of the present invention are possible without departing from the broad spirit and scope of the present invention. The above-described embodiments are for the purpose of explaining the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is indicated by the claims, not the embodiments. Various modifications made within the scope of the claims and the scope of the invention equivalent thereto are considered to be within the scope of the present invention. [Explanation of symbols]

[0035] 100...In-vehicle display device 1. Vehicle 2…Dashboard, 2a…Top 3...front glass, 3a...ceramic forming portion 4...User, 5...Eyebox 10...Display unit, 10a...Image display area, L...Display light 20: cylindrical body, 20a: opening, 20b: edge cover portion 21...inner surface, 21a...ventilation port 30: cover glass; 31: inclined surface; E1: first end; E2: second end 40...Control unit 50…Defroster, 51…Duct, D…Defroster wind

Claims

1. an indicator located within a dashboard of the vehicle and emitting an indicator light representing an image; A cover glass covering the display; a cylindrical body that transmits the display light emitted from the display device and passing through the cover glass toward a windshield of the vehicle; The cylindrical body is formed with an air outlet for sending defroster wind, which is wind generated by a defroster, into the cylindrical body, The cover glass has an inclined surface that receives the defroster wind sent from the air outlet into the cylindrical body, and the inclined surface guides the defroster wind toward the windshield. In-vehicle display device.

2. the inclined surface has a first end portion located on the side of the air outlet and a second end portion located on a front side of the vehicle relative to the first end portion, and is inclined such that the second end portion is located higher than the first end portion; The cylindrical body is provided with an edge cover portion that covers the second end portion of the cover glass. The vehicle-mounted display device according to claim 1 .

3. The lower end of the air outlet is located rearward of the upper end of the air outlet. The in-vehicle display device according to claim 1 or 2.

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