JPWO2017061000A1 - Head-up display device - Google Patents

Abstract

It is an object of the present invention to provide a head-up display device capable of blocking external light with an inexpensive structure, enhancing the heat shielding effect, and reducing deterioration.
In order to achieve the above object, a head-up display device for a vehicle that projects a virtual image, an image projection unit that projects an image to be displayed as a virtual image, and a dimming mirror that reflects the image projected by the image projection unit By having a light control mirror film on / off control unit that switches the film and the light control mirror film between a transmission state and a mirror state, and switching the light control mirror film to the mirror state by the light control mirror film on / off control unit, The image reflected by the dimming mirror film is projected through the windshield of the vehicle, and the dimming mirror film is switched to the transmissive state by the dimming mirror film on / off control unit. It is configured to cut off the irradiation.

Description

  The present invention relates to a head-up display device, and more particularly to a head-up display device that is mounted on a vehicle and blocks external light to enhance a heat shielding effect.

  As one of head up display devices (hereinafter referred to as HUD), for example, there is a vehicle HUD. It is known that this vehicle HUD can minimize the movement of the driver's line of sight by displaying the driving information necessary for driving as a virtual image through a windshield. Further, since the vehicle HUD is installed in an instrument panel in the vicinity of the windshield, there is a problem that sunlight is irradiated, the temperature is likely to rise, and the deterioration of the HUD is promoted.

  As a background art in this technical field, there is JP 2014-98876 A (Patent Document 1). In Patent Document 1, a head-up display device includes a housing having a window portion, a display element that is disposed in the housing and emits display light, and is installed in the housing to reflect the display light to the outside from the window portion. A reflection member that emits light, a first drive circuit that drives the display element, and an optical element provided in the window that transmits incident light when driving using polarized light or light diffusion, but does not transmit incident light when not driven A configuration is disclosed that includes a shutter, a second drive circuit that drives the optical shutter, and a power supply unit that supplies power to the first drive circuit and the second drive circuit.

JP 2014-98766 A

  In Patent Document 1, sunlight is prevented from entering the housing when the apparatus is not in operation, and the optical shutter does not require a space for opening and closing, and obstructs the user's visual field when displaying an image during operation of the apparatus. Thus, a head-up display device capable of displaying a large and good image can be provided. However, since an optical shutter provided in the housing window is required, there is a problem that the cost of the apparatus increases.

  An object of the present invention is to provide a HUD capable of blocking external light with a low-cost configuration, enhancing a heat shielding effect, and reducing deterioration.

  In order to solve the above-described problem, the present invention is, for example, a vehicle head-up display device that projects a virtual image, an image projection unit that projects an image to be displayed as a virtual image, and an image projection unit A dimming mirror film that reflects the image projected in step S4, and a dimming mirror film on / off control unit that switches the dimming mirror film between a transmission state and a mirror state, and the dimming mirror film on / off control unit By switching the light control mirror film to the mirror state, the image reflected by the light control mirror film is projected through the windshield of the vehicle, and the light control mirror film on / off control unit transmits the light control mirror film. By switching to the state, it is configured to block the irradiation of the external light to the image projection unit.

  According to the present invention, it is possible to provide a HUD that can block outside light with an inexpensive configuration, enhance a heat shielding effect, and reduce deterioration.

It is a block diagram of HUD in Example 1, and the structure explanatory drawing of the periphery. It is explanatory drawing at the time of making the light control mirror film in Example 1 into a transparent state. It is a block diagram of HUD in Example 2, and the structure explanatory drawing of the periphery. It is explanatory drawing at the time of making the several functional liquid crystal film in Example 2 into a diffused state. It is a block diagram of HUD in Example 3, and the structure explanatory drawing of the periphery. It is explanatory drawing at the time of making the several functional liquid crystal film in Example 3 into a diffused state. It is a block diagram of HUD in Example 4, and the structure explanatory drawing of the periphery. It is explanatory drawing at the time of making the light control mirror film in Example 4 into a mirror state. It is a block diagram of HUD in Example 5, and the structure explanatory drawing of the periphery. It is a functional block diagram of HUD in Examples 1-5.

  Embodiments of the present invention will be described below with reference to the drawings.

  In this example, the dimming mirror film is used as a curved mirror, and when the HUD is not used, the dimming mirror film is made transparent to block the light from returning to the image projection unit in the HUD. An example of heat shielding will be described.

  FIG. 1A is a configuration diagram of a HUD in the present embodiment and a configuration explanatory diagram of its periphery. In FIG. 1A, 1 is a driver | operator's viewpoint, 2 is the windshield of the vehicle carrying HUD, 3 is HUD. The HUD 3 includes a projector 4, a diffusion plate 5, and a light control mirror film 6. Here, the light control mirror film 6 is a film which can electrically control a transmission state and a mirror state. In addition, although not shown in figure, the switching of the permeation | transmission state and mirror state of a light control mirror film is performed by the light control mirror film on / off control part. Further, the HUD 3 may be a liquid crystal display instead of the image projection unit including the projector 4 and the diffusion plate 5.

  In FIG. 1A, 7 indicates the sun and 8 is sunlight. The sunlight 8 is irradiated into the HUD 3 via the windshield 2. On the other hand, the image projected by the projector 4 is imaged by the diffusing plate 5, and the image is reflected by the dimming mirror film 6 by bringing the dimming mirror film 6 into a mirror state. The reflected image is projected as a virtual image through the windshield of the vehicle and displayed as HUD.

  FIG. 1B is an explanatory diagram when the light control mirror film 6 is in a transmissive state when the HUD 3 is not used. In FIG. 1B, when the HUD 3 is not used, the light control mirror film 6 is set in a transmission state. Since the light control mirror film 6 is arrange | positioned on the base of a black mold, the sunlight 8 permeate | transmits the light control mirror film 6 and is absorbed, and can block the further irradiation in HUD3. Thereby, irradiation of outside light into the HUD can be blocked, and deterioration of the HUD 3 can be reduced.

  In the above embodiment, when the HUD 3 is not used, the entire surface of the light control mirror film 6 is transmitted and the external light is cut off. However, the light control mirror film 6 is divided into predetermined areas, and the HUD function is divided into divided areas. The region of the part not using the light may be blocked so that the outside light is blocked.

  As described above, the present embodiment is a vehicle head-up display device that projects a virtual image, and includes an image projection unit that projects an image to be displayed as a virtual image, and a control that reflects the image projected by the image projection unit. It has a light mirror film and a light control mirror film on / off control unit that switches the light control mirror film between a transmission state and a mirror state, and the light control mirror film on / off control unit switches the light control mirror film to a mirror state Thus, the image reflected by the light control mirror film is projected through the windshield of the vehicle, and the light control mirror film on / off control unit switches the light control mirror film to the transmission state, thereby The image projection unit is configured to block irradiation.

  As a result, it is possible to provide a HUD that can block external light with an inexpensive configuration, enhance the heat shielding effect, and reduce deterioration.

  In this embodiment, another configuration of the HUD will be described. FIG. 2A is a configuration diagram of the HUD in the present embodiment and a configuration explanatory diagram of the periphery thereof. In FIG. 2A, 10 is a functional liquid crystal film, 9 is a mirror, and other configurations are the same as those in FIG. The functional liquid crystal film 10 is a film that can electrically control a transmission state and a diffusion state. In the transmission state, it is transparent and transmits light, but in the diffusion state, it becomes a white state and light is attenuated. In this embodiment, a plurality of functional liquid crystal films 10 are provided so as to obtain a sufficient attenuation amount for blocking light. In addition, although not shown in figure, the switching of the permeation | transmission state of a functional liquid crystal film and a spreading | diffusion state is performed by a functional liquid crystal film on / off control part.

  In FIG. 2A, one of the functional liquid crystal films 10 is in a diffusion state and the other is in a transmission state, so that the function as a diffusion plate can be achieved. The image projected by the projector 4 is in a diffusion state. The image formed on the functional liquid crystal film 10 is reflected by the mirror 9, and the reflected image is projected as a virtual image through the windshield 2 of the vehicle and displayed as HUD.

  FIG. 2B is an explanatory diagram when a plurality of functional liquid crystal films are in a diffusion state when the HUD 3 is not used. In FIG. 2B, when the HUD 3 is not used, a plurality of functional liquid crystal films 10 are in a diffusion state. By setting the plurality of functional liquid crystal films 10 in a diffusing state, a sufficient amount of attenuation can be obtained to block light, and sunlight 8 can be blocked by the plurality of functional liquid crystal films 10. . Thereby, the irradiation of outside light into the HUD can be cut off, and the deterioration of the HUD 3 can be reduced.

  As described above, the present embodiment is a vehicle head-up display device that projects a virtual image, and a projector that projects an image to be displayed as a virtual image, and a plurality of functions that are irradiated with the image projected by the projector A functional liquid crystal film, a mirror that reflects an image that has passed through a plurality of functional liquid crystal films, and a functional liquid crystal film on / off control unit that switches the functional liquid crystal film between a transmission state and a diffusion state. By switching one functional liquid crystal film of a plurality of sheets to a diffusion state by the liquid crystal film on / off control unit, the liquid crystal film functions as a diffusion plate that forms an image projected by the projector, and the image is mirrored. Is projected onto the windshield of the vehicle, and the functional liquid crystal film on / off control unit turns the multiple functional liquid crystal films into a diffusion state. It is to obtain, configured to cut off the irradiation of the external light projector.

  Thereby, it is possible to provide an HUD that can block external light with an inexpensive configuration, enhance the heat shielding effect, and reduce deterioration.

  In the present embodiment, the white state portion of the functional liquid crystal film functions as a diffusion plate by setting one of the plurality of functional liquid crystal films 10 to the diffusion state, and the white color of the functional liquid crystal film. An image is formed in the state portion. The display position of the virtual image is determined according to the distance between the white state portion of the functional liquid crystal film 10 and the windshield 2 via the mirror 9. Therefore, there is an effect that the display position of the virtual image can be changed depending on which of the plurality of functional liquid crystal films 10 having different distances from the mirror 9 is in the diffusion state.

  In this embodiment, another configuration of the HUD will be described. FIG. 3A is a configuration diagram of the HUD in the present embodiment and a configuration explanatory diagram of its periphery. In FIG. 3A, 5 is a diffusion plate, 11 is an optical lens, and a plurality of functional liquid crystal films 10 are arranged in front of and behind them. Other configurations are the same as those in FIG.

  In FIG. 3A, since the diffusing plate 5 is provided, the functional liquid crystal film 10 does not need a function as a diffusing plate, and when the HUD 3 is used, all the functional liquid crystal films 10 are in a transmissive state. As a result, the image projected by the projector 4 is formed on the diffusion plate 5, and the formed image is guided to the mirror 9 by the optical lens 11, reflected by the mirror 9, and the reflected image is converted into the vehicle. Is projected as a virtual image through the windshield 2 and displayed as HUD.

  FIG. 3B is an explanatory diagram when a plurality of functional liquid crystal films are in a diffusion state when the HUD 3 is not used. In FIG. 3B, when the HUD 3 is not used, a plurality of functional liquid crystal films 10 are in a diffusion state. By setting the plurality of functional liquid crystal films 10 in a diffusing state, a sufficient amount of attenuation can be obtained to block light, and sunlight 8 can be blocked by the plurality of functional liquid crystal films 10. . Thereby, the irradiation of outside light into the HUD can be cut off, and the deterioration of the HUD 3 can be reduced. In addition, the arrangement | positioning location of the functional liquid crystal film 10 may be arbitrary. The optical lens 11 is a member for guiding the image formed on the diffusion plate 5 to the mirror 9, but may be configured without this.

  As described above, the present embodiment is a vehicle head-up display device that projects a virtual image, a projector that projects an image to be displayed as a virtual image, a diffusion plate that forms an image projected by the projector, Multiple functional liquid crystal films irradiated with images projected by the projector, mirrors that reflect the images that have passed through the multiple functional liquid crystal films, and functionality to switch the functional liquid crystal film between a transmission state and a diffusion state A liquid crystal film on / off control unit, and the functional liquid crystal film on / off control unit switches a plurality of functional liquid crystal films to a transmissive state, on a diffusion plate on which an image projected by a projector is formed. The image is projected onto the windshield of the vehicle through a mirror, and a plurality of functional liquid crystal films are expanded by the functional liquid crystal film on / off control unit. By switching the state, configured to cut off the irradiation of the external light projector.

  Thereby, it is possible to provide an HUD that can block external light with an inexpensive configuration, enhance the heat shielding effect, and reduce deterioration.

  In this embodiment, another configuration of the HUD will be described. FIG. 4A is a configuration diagram of the HUD in the present embodiment and a configuration explanatory diagram of the periphery thereof. In FIG. 4A, 5 is a diffusion plate, 9 is a mirror, and 12 is a light control mirror film. Here, the light control mirror film is a member that can electrically control the transmission state and the mirror state. In addition, although not shown in figure, the switching of the permeation | transmission state and mirror state of a light control mirror film is performed by the light control mirror film on / off control part. Other configurations are the same as those in FIG.

  In FIG. 4A, the light control mirror film 12 is installed in a part of instrument panel in the vicinity of the windshield 2 in which HUD3 is installed, for example. Then, the image projected by the projector 4 is imaged by the diffusion plate 5, the image formed is reflected by the mirror 9, and the reflected image passes through the light control mirror film 12 in the transmissive state. The windshield 2 is irradiated and projected as a virtual image to display HUD.

  FIG. 4B is an explanatory diagram when the dimming mirror film is in a mirror state when the HUD 3 is not used. In FIG. 4B, when HUD3 is not used, the light control mirror film 12 is made into a mirror state. Thereby, the sunlight 8 is reflected by the light control mirror film 12, and can block the irradiation of the outside light into the HUD and reduce the deterioration of the HUD 3.

  As described above, this embodiment is a vehicle head-up display device that projects a virtual image, and includes an image projection unit that projects an image to be displayed as a virtual image, and a mirror that reflects an image projected by the image projection unit. A dimming mirror film on which an image reflected from the mirror is irradiated, and a dimming mirror film on / off control unit for switching the dimming mirror film between a transmission state and a mirror state, and the dimming mirror film on By switching the dimming mirror film to the transmissive state by the / off control unit, the reflected image from the mirror that has passed through the dimming mirror film is projected on the windshield of the vehicle, and the dimming mirror film on / off control unit By switching the dimming mirror film to the mirror state, it is configured to block the irradiation of the external light to the image projection unit.

  Thereby, it is possible to provide an HUD that can block external light with an inexpensive configuration, enhance the heat shielding effect, and reduce deterioration.

  In this embodiment, another configuration of the HUD will be described. FIG. 5 is a configuration diagram of the HUD in the present embodiment and a configuration explanatory diagram of its periphery. In FIG. 5, 5 is a diffusion plate, and 13 is a micromirror array. Note that the angle control of the micromirror array is performed by a micromirror array control unit (not shown). Other configurations are the same as those in FIG.

  In FIG. 5, the image projected by the projector 4 is imaged by the diffusion plate 5, the image formed is reflected by the micromirror array 13, and the reflected image is a virtual image via the vehicle windshield 2. The HUD is displayed after being projected. Here, since the micromirror array 13 is a plurality of divided mirrors, the direction of reflection can be changed by controlling the direction of the mirror. Therefore, when the HUD 3 is not used, by controlling so that the sunlight 8 is not irradiated into the HUD, the irradiation of the external light into the HUD can be cut off and the deterioration of the HUD 3 can be reduced.

  As described above, the present embodiment is a vehicle head-up display device that projects a virtual image, and includes an image projection unit that projects an image to be displayed as a virtual image, and a micro that reflects an image projected by the image projection unit. A mirror array and a micro mirror array control unit for controlling the angle of the micro mirror array. The micro mirror array control unit projects an image reflected by the micro mirror array onto a vehicle windshield or It is configured to switch whether to block the irradiation to the image projection unit.

  As a result, it is possible to provide a HUD that can block outside light, enhance the heat shielding effect, and reduce deterioration. Further, since the light quantity control in the minimum range can be performed by the micromirror array 13, for example, the contrast of the display image of the HUD can be changed. In addition, since the curvature of the mirror can be controlled electronically, there is an advantage that the hardware can be shared for the shape of the windshield that differs depending on the vehicle type. Furthermore, when only a part of the micromirror array 13 is used as the HUD, it is possible to control the other part so that the sunlight 8 is not irradiated into the HUD.

  In the present embodiment, functional blocks of the HUD that can block the above-described irradiation of outside light into the HUD and reduce the deterioration of the HUD 3 will be described.

  A functional block diagram of the HUD in the present embodiment is shown in FIG. FIG. 6 shows a functional block including all functions corresponding to the first to fifth embodiments. Therefore, the functional block corresponding to each embodiment has a partial configuration shown in FIG.

  In FIG. 6, 21 is an ignition key detection, 22 is an image projection unit, 23 is a mirror, 24 is a mirror control unit that controls rotation of the mirror 23, 25 is a dimming mirror film, and 26 is transmitted through the dimming mirror film 25. A dimming mirror film on / off control unit for switching between a state and a mirror state, 27 is a functional liquid crystal film, 28 is a functional liquid crystal film on / off control unit for switching the functional liquid crystal film 27 between a transmission state and a diffusion state, and 29 is A micromirror array, 30 is a micromirror array control unit for controlling the angle of the micromirror array 29, 31 is a vehicle-mounted camera not directly related to the present embodiment, 32 is a vehicle information input unit, and 33 is an operation input unit. Reference numeral 20 denotes a control unit that performs vehicle information detection, input image analysis, output image processing, and the like to control the entire HUD.

  The blocking of the irradiation of outside light into the HUD described in the above embodiments is mainly performed by the light control mirror film on / off control unit 26, the functional liquid crystal film on / off control unit 28, and the micromirror array control unit 30. carry out.

  In addition, the timing of blocking the irradiation of the HUD is performed when the HUD is not used, when the engine is turned off by the ignition key detection 21, or when the vehicle is stopped for a long time based on information from the vehicle information input unit 34. It may be. Further, for example, the driver may instruct the dimming mirror film on / off switching by the operation input unit 35.

  The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of each embodiment.

1: driver's viewpoint, 2: windshield, 3: HUD, 4: projector, 5: diffuser plate, 6: dimming mirror film, 7: sun, 8: sunlight, 9: mirror, 10: functional liquid crystal Film: 11: Optical lens, 12: Light control mirror film, 13: Micro mirror array, 20: Control unit, 21: Ignition key detection, 22: Image projection unit, 23: Mirror, 24: Mirror control unit, 25: Control Optical mirror film, 26: Dimming mirror film on / off control unit, 27: Functional liquid crystal film, 28: Functional liquid crystal film on / off control unit, 29: Micro mirror array, 30: Micro mirror array control unit, 31 : In-vehicle camera, 32: Vehicle information input unit, 33: Operation input unit

Claims (7)

A vehicle head-up display device that projects a virtual image,
An image projection unit that projects an image to be displayed as a virtual image;
A light control mirror film that reflects the image projected by the image projection unit;
A dimming mirror film on / off controller for switching the dimming mirror film between a transmission state and a mirror state;
By switching the light control mirror film to the mirror state by the light control mirror film on / off control unit, the image reflected by the light control mirror film is projected through the windshield of the vehicle,
A head-up display device characterized in that irradiation of external light to the image projection unit is blocked by switching the dimming mirror film to a transmission state by the dimming mirror film on / off control unit. A vehicle head-up display device that projects a virtual image,
A projector that projects an image to be displayed as a virtual image;
A plurality of functional liquid crystal films irradiated with an image projected by the projector;
A mirror that reflects an image that has passed through the plurality of functional liquid crystal films;
A functional liquid crystal film on / off control unit for switching the functional liquid crystal film between a transmission state and a diffusion state;
By switching the functional liquid crystal film of a plurality of sheets to a diffusion state by the functional liquid crystal film on / off control unit, the functional liquid crystal film functions as a diffusion plate that forms an image projected by the projector, Projecting the image formed on the windshield of the vehicle through the mirror,
A head-up display device that blocks irradiation of external light to the projector by switching a plurality of the functional liquid crystal films to a diffusion state by the functional liquid crystal film on / off control unit. A vehicle head-up display device that projects a virtual image,
A projector that projects an image to be displayed as a virtual image;
A diffusion plate that forms an image projected by the projector;
A plurality of functional liquid crystal films irradiated with an image projected by the projector;
A mirror that reflects an image that has passed through the plurality of functional liquid crystal films;
A functional liquid crystal film on / off control unit for switching the functional liquid crystal film between a transmission state and a diffusion state;
The functional liquid crystal film on / off control unit switches a plurality of the functional liquid crystal films to a transmissive state, and an image on a diffusion plate on which an image projected by the projector is formed is displayed on the vehicle via the mirror. Project on the windshield of
A head-up display device that blocks irradiation of external light to the projector by switching a plurality of the functional liquid crystal films to a diffusion state by the functional liquid crystal film on / off control unit. A vehicle head-up display device that projects a virtual image,
An image projection unit that projects an image to be displayed as a virtual image;
A mirror that reflects the image projected by the image projection unit;
A dimming mirror film to which the reflected image from the mirror is irradiated;
A light control mirror film on / off control unit that switches the light control mirror film between a transmission state and a mirror state, and the light control mirror film on / off control unit switches the light control mirror film to a transmission state. The reflected image from the mirror that has passed through the light control mirror film is projected onto the windshield of the vehicle, and the light control mirror film is switched to the mirror state by the light control mirror film on / off control unit. A head-up display device that blocks irradiation of external light to the image projection unit. A vehicle head-up display device that projects a virtual image,
An image projection unit that projects an image to be displayed as a virtual image;
A micromirror array that reflects the image projected by the image projection unit;
A micromirror array control unit for controlling the angle of the micromirror array,
A head that switches whether the image reflected by the micromirror array is projected onto a windshield of the vehicle or the irradiation of external light to the image projection unit is blocked by the micromirror array control unit. Up display device. The head-up display device according to any one of claims 1, 4, and 5,
The head-up display device, wherein the image projection unit is a projector and a diffusion plate that forms an image projected by the projector. The head-up display device according to any one of claims 1, 4, and 5,
The head-up display device, wherein the image projection unit is a liquid crystal display.

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