WO2017169610A1

WO2017169610A1 - Head-up display device

Info

Publication number: WO2017169610A1
Application number: PCT/JP2017/009390
Authority: WO
Inventors: 一夫諸橋; 芽久実佐藤
Original assignee: 日本精機株式会社
Priority date: 2016-03-30
Filing date: 2017-03-09
Publication date: 2017-10-05

Abstract

Provided is a head-up display device with which a viewer can recognize the displayed content in a more reliable manner. A head-up display device 100 for displaying symbols representing information on a first display region A1 and a second display region A2 displayed at different distances when viewed by a driver E, wherein the head-up display 100 is provided with a control unit 190 for displaying a symbol in the first display region A1 and subsequently displaying a symbol in the second display region A2 and at a different position to that at which the symbol was displayed in the first display region A1 as viewed by the driver E.

Description

Head-up display device

The present invention relates to a head-up display device.

2. Description of the Related Art As a display device for a vehicle, a head-up display (HUD) device that is a projection device as disclosed in Patent Document 1 is known. The head-up display device disclosed in Patent Document 1 displays a virtual image corresponding to each display light emitted from two displays on a windshield via an optical system including a concave mirror, and drives the vehicle. It is intended to visually recognize the driver.

Japanese Patent Laying-Open No. 2015-101311

This head-up display device may display highly urgent information such as information indicating that the remaining amount of gasoline is low or information indicating that the legal speed is significantly exceeded as a virtual image. In such a head-up display device, it is desired to realize a display mode of information that can be easily understood by a viewer.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a head-up display device that allows a viewer to more reliably recognize display contents.

In order to achieve the above object, a head-up display device according to the present invention comprises:
A head-up display device that displays symbols representing information in a first display area and a second display area that are displayed at different distances as viewed from a viewer,
The symbol is displayed in the first display area, and the symbol is then displayed in the second display area and at a position different from the position displayed in the first display area as viewed from the viewer. A control unit for displaying is provided.

According to the present invention, it is possible to provide a head-up display device that allows a viewer to recognize display content more reliably.

It is the schematic which shows the structure of the head-up display apparatus which concerns on one embodiment. It is a figure which shows the flowchart of a display process of the head-up display apparatus which concerns on one embodiment. It is a figure for demonstrating the icon displayed on a driver | operator of the head-up display apparatus which concerns on one Embodiment. It is a figure which shows the flowchart of a display process of the head-up display apparatus which concerns on a modification. It is a figure for demonstrating the icon displayed on a driver | operator of the head-up display apparatus which concerns on a modification. It is a figure which shows the flowchart of a display process of the head-up display apparatus which concerns on a modification. It is a figure for demonstrating the icon displayed on a driver | operator of the head-up display apparatus which concerns on a modification. It is a figure for demonstrating the icon displayed on a driver | operator of the head-up display apparatus which concerns on a modification.

Hereinafter, a head-up display device (hereinafter referred to as a “HUD device”) according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The HUD device 100 according to the present embodiment is mounted on a vehicle such as an automobile. As shown in FIG. 1, the HUD device 100 includes a housing 110, a display 120, a fold mirror 130, an imaging position adjustment mirror 140, a first screen 150, a second screen 160, and a plane mirror 170. And a concave mirror 180 and a control unit 190.

In the HUD device 100, the display lights L1 and L2 are emitted from the display device 120 to the first screen 150 and the second screen 160 via the fold mirror 130 and the imaging position adjustment mirror 140. When these display lights L1 and L2 are incident on the first screen 150 and the second screen 160, the display images are displayed, and the display lights N1 and N2 corresponding to the display images are emitted, and the plane mirror 170 is displayed. The light is sequentially reflected by the concave mirror 180. Then, the display lights N1 and N2 reflected by the concave mirror 180 are applied to the windshield 300 of the vehicle. Thereby, the viewer (mainly driver E) can visually recognize the first virtual image V1 formed by the display light N1 and the second virtual image V2 formed by the display light N2. The first virtual image V1 is formed in the first display area A1 extending in the horizontal direction along the road surface, as viewed from the driver E. In the present embodiment, the first display area A1 is formed in a concave shape with the opening facing downward when viewed from the driver E. The second virtual image V2 is located in the vicinity of the first virtual image V1 when viewed from the driver E, and is formed in the second display region A2 extending in a direction perpendicular to the line-of-sight direction of the driver E. In the present embodiment, the second display area A2 is larger in area than the first display area A1, and has a rectangular shape that fills the missing portion of the first display area A1 below the first display area A1. Eggplant.

The housing 110 has a box shape and stores various members. The housing 110 is made of, for example, black synthetic resin. An opening 111 for allowing the display lights N 1 and N 2 to pass from the inside to the outside of the housing 110 is provided in a part of the peripheral wall of the housing 110. The opening 111 is covered with a translucent cover 112.

The display 120 for emitting the display lights L1 and L2 to the first screen 150 and the second screen 160, respectively, is a reflective display element such as DMD (Digital Micro Mirror Device) or LCOS (registered trademark: Liquid Crystal On Silicon). And a transmissive display element such as a TFT (Thin Film Transistor) liquid crystal panel. The display unit 120 emits display lights L1 and L2 corresponding to two display images to the fold mirror 130 in response to a control signal input from the control unit 190.

The fold mirror 130 is composed of a flat mirror in which a metal reflective film is formed on one surface of a flat substrate made of synthetic resin or glass, and connects the display lights L1 and L2 emitted from the display unit 120. Reflected to the image position adjustment mirror 140.

The imaging position adjusting mirror 140 has a first reflecting surface 141 that reflects the display light L1 and a second reflecting surface 142 that reflects the display light L2. The first reflecting surface 141 has a curved shape protruding in the thickness direction of the imaging position adjusting mirror 140, and the second reflecting surface 142 has a flat shape. The imaging position adjusting mirror 140 is made of synthetic resin or glass, and a portion corresponding to the first reflecting surface 141 is a curved surface, and a portion corresponding to the second reflecting surface 142 is flat. A metal reflective film is formed on one surface. Since the display lights L1 and L2 are reflected by the imaging position adjusting mirror 140, the optical path length from the display 120 to the imaging position of the display light L1 is changed from the display 120 to the imaging position of the display light L2. It becomes longer than the optical path length.

The first screen 150 and the second screen 160 are transmissive screens composed of a holographic diffuser, a microlens array, a diffusion plate, and the like. When the display light L1 is incident on one surface side of the first screen 150 from the display device 120, a display image is displayed on the other surface side. Further, when the display light L2 is incident on the one surface side of the second screen 160 from the display device 120, a display image is displayed on the other surface side. The display light N1 corresponding to the display image emitted from the other surface side of the first screen 150 is emitted toward the plane mirror 170. Further, the display light N12 corresponding to the display image emitted from the other surface side of the second screen 160 is also emitted toward the plane mirror 170.

The plane mirror 170 reflects the display light N1 incident from the first screen 150 and the display light N2 incident from the second screen 160 to the concave mirror 180. The flat mirror 170 is formed by forming a metal reflective film on one surface of a flat substrate made of synthetic resin, glass or the like.

The concave mirror 180 reflects the two display lights N1 and N2 toward the windshield 300. The concave mirror 180 has a metal reflective film formed on one surface of a base material made of synthetic resin or glass. The plane mirror 170 and the concave mirror 180 constitute an optical system that guides the two display lights N1 and N2 to the windshield 300.

The control unit 190 includes a CPU (Central Processing Unit) and the like, executes a control program stored in a storage unit (not shown), and controls display by the display unit 120. Details of the control will be described later.

In addition to the HUD device 100, the vehicle includes a sensor group 200 and an ECU (Electronic Control Unit) 210. The sensor group 200 includes a fuel sensor that measures the remaining amount of fuel, a speed sensor that measures the traveling speed of the vehicle, and the like, and transmits a signal indicating the measured physical quantity to the ECU 210. The control unit 190 recognizes the measurement result of the sensor group 200 through the ECU 210.

Next, display processing of the HUD device 100 will be described with reference to FIGS.

2) The ignition of the vehicle is turned on, the power of the HUD device 100 is turned on, and the display process shown in the flowchart of FIG. 2 is started.

The control unit 190 determines whether or not the remaining amount of fuel is equal to or less than a predetermined amount based on the information acquired from the ECU 210 (step S11). When it is determined that the remaining amount of fuel exceeds the predetermined amount (step S11; NO), the control unit 190 continues to monitor the remaining amount of fuel.

When it is determined that the remaining amount of fuel is equal to or less than the predetermined amount (step S11; YES), the control unit 190 displays an icon as the first virtual image V1 in the first display area A1, as shown in FIG. V1a is displayed (step S12). The icon V1a is a symbol for requesting the driver E to correct the current state of the vehicle, that is, for refueling, and indicates that the remaining amount of fuel is small. The icon V1a is displayed at the center of the first display area A1 so as to be emphasized to the driver E.

After a predetermined time has elapsed since the icon V1a was displayed, the control unit 190 cancels the display of the icon V1a (step S13). Subsequently, as shown in FIG. 3B, the control unit 190 displays the icon V2a as the second virtual image V2 in the second display area A2 (step S14). Like the icon V1a as the first virtual image V1, the icon V2a is a symbol indicating that the remaining amount of fuel is small and is smaller in size than the icon V1a.
From the viewpoint of the position and size of the icon V1a in the first display area A1, the driver E is stronger than the icon V1a in the second display area A2 to correct the vehicle state, and in this embodiment, refueling is required. it can. On the other hand, the icon V1a in the second display area A2 is less likely to interfere with driving than the icon V1a in the first display area A1 from the viewpoint of position and size.

After displaying the icon V2a as the second virtual image V2, the control unit 190 determines whether or not the remaining amount of fuel is equal to or less than a predetermined amount based on the information acquired from the ECU 210 (step S15).

When it is determined that the remaining amount of fuel exceeds the predetermined amount (step S15; NO), the control unit 190 cancels the display of the icon V2a (step S16), and repeats the processing after step S11.

When it is determined that the remaining amount of fuel is equal to or less than the predetermined amount (step S15; YES), it is determined whether or not a predetermined time has elapsed since the icon V2a was displayed (step S17).

When it is determined that the predetermined time has not elapsed since the icon V2a was displayed (step S17; NO), the control unit 190 returns to step S15 and repeats a series of processes.

The control unit 190 determines that the predetermined time has elapsed after displaying the icon V2a (step S17; YES) when the vehicle state is corrected for a predetermined time, that is, when refueling has not been performed. The display is canceled (step S18), and the process returns to step S12 to repeat a series of processes. That is, the control unit 190 displays the icon V1a larger than the icon V2a again in the first display area A1.

The series of display processes shown in the flowchart of FIG. 2 are repeatedly performed until the vehicle ignition is turned off.

The embodiment of the present invention has been described above.

The HUD device 100 according to the present embodiment displays, for example, an icon V1a representing a large size symbol indicating that in the first display area A1 when the remaining amount of fuel is small. Accordingly, the driver E can easily recognize that the remaining amount of fuel is small. The HUD device 100 switches the display from the icon V1a to the icon V2a in the second display area A2 having a smaller size than the icon V1a. Therefore, the display of the icon V2a without displaying the icon V1a for a long time is prevented from hindering driving. Further, once the icon V2a is displayed in the second display area A2, if the remaining amount of fuel does not exceed the predetermined amount even after a predetermined time has elapsed, the icon V1a is displayed again with emphasis on the driver E. Thereby, it can suppress that the driver | operator E forgets refueling.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation and application are possible.

When displaying the icon V1a and the icon V2a, the control unit 190 of the HUD device 100 according to the present embodiment may change each display luminance so as to gradually change from a predetermined initial value.

The control unit 190 of the HUD device 100 according to the present embodiment has been described with the example in which the icon V1a is displayed again after a predetermined time has elapsed since the icon V2a was displayed (steps S17 and S18). The icon V1a may be controlled to be displayed again when the travel distance of the vehicle becomes a predetermined distance or more after the icon V2a is displayed. Steps S17 and S18 may be omitted.
Furthermore, the HUD device 100 may display a small icon V2a while the vehicle is traveling, and may display a large icon V1a when the vehicle stops.
Further, the icons V1a and V2a may represent the gasoline remaining amount by a bar graph, or may represent that the remaining amount of the battery or charging is required in an electric vehicle or a hybrid car. Both icons V1a and V2a may represent the remaining amount of gasoline with different patterns. The sizes of both icons V1a and V2a may be the same.

In the present embodiment, when the controller 190 of the HUD device 100 cancels the display of the icon V1a and displays the icon V2a, the controller 190 gradually moves from the display position of the icon V1a to the display position of the second icon V2a. Display control may be performed. At this time, the control unit 190 may display the icons V1a and V2a so that the size of the icons V1a and V2a decreases as the icon V2a approaches the icon V2a. Similarly, the control unit 190 may display the icons V1a and V2a so that the sizes of the icons V1a and V2a increase as the icon V2a approaches the icon V1a. Thereby, the driver | operator E can recognize more reliably that the display of the icon V1a and the icon V2a is continued after a movement.

The control unit 190 of the HUD device 100 according to the present embodiment may further include a sound generation unit 220 including a speaker or a buzzer that generates sound, as indicated by a broken line in FIG. The control unit 190 may control the sound generated when the icon V1a is displayed and the sound generated when the icon V2a is displayed through the sound generation unit 220 to be different. For example, the control unit 190 may change the tone color, volume, level, and period of the sound according to the position of the displayed icons V1a and V2a. For example, the volume of the sound when the large icon V1a is displayed may be larger than the volume of the sound when the small icon V2a is displayed. From the same point of view, the period of sound such as a buzzer sound when the large icon V1a is displayed may be shorter than the period of sound when the small icon V2a is displayed. Further, the control unit 190 may generate a different sound depending on the display position of the moving icon. For example, as the moving icon approaches the icon V1a, the volume may be increased, the sound may be increased, or the period of a sound such as a buzzer may be shortened.

Furthermore, as described above, when the icons 190 and V2a are moved, the control unit 190 transmits different sounds according to the moving directions of the icons V1a and V2a through the sound generation unit 220, for example, timbre, volume, High and low periods may be generated. For example, the sound volume when the icon moves from the icon V2a toward the icon V1a may be larger than the sound volume when the icon moves from the icon V1a toward the icon V2a.

Further, when displaying or moving the icons V1a and V2a, the control unit 190 may reproduce a voice message indicating that through the sound generation unit 220.

In these configurations, the driver E can recognize the display position and moving direction of the icon not only visually but also through hearing.

In the present embodiment, the example of the virtual image V1 and the virtual image V2 indicating that the remaining amount of fuel is very small has been described. However, the present invention is not limited to this. For example, a passenger including the driver E is wearing a seat belt. If not, the occupant (viewer) may be prompted to correct by the same processing as in the present embodiment.

Specifically, FIG. 4 is a flowchart showing an example of a display process for prompting the user to wear a seat belt, and generally the same process as the display process according to the present embodiment is performed. The difference from the display processing according to the present embodiment is illustrated in FIG. 5A in that it is determined whether or not the seat belt is fastened in steps S21 and S25, and in steps S22 and S24. The icon V1b to be displayed or the icon V2b illustrated in FIG. 5B is displayed. Icon V1b and icon V2b are symbols indicating that the seat belt is not worn, and the size of icon V1b is larger than that of icon V2b. By this display process, it is possible to prompt the passengers including the driver E to wear the seat belt. In step S22 and / or step S24, the sound generator 220 may be controlled to generate a sound such as a buzzer.

In addition, when the difference between the vehicle speed and the legal speed exceeds the threshold, the control unit 190 of the HUD device 100 displays a large icon V1c in the first display area A1, and when the difference is equal to or less than the threshold. The small icon V2c may be displayed in the second display area A2.

FIG. 6 is a flowchart showing a display process for warning that the vehicle speed S1 exceeds the legal speed S2.

The control unit 190 acquires in advance information on the legal speed S2 of the road that is currently running from an external device such as a car navigation device, and displays the icon V2c illustrated in FIG. 7A in the second display area A2. (Step S31). The icon V2c is a kind of symbol indicating the legal speed of the road that is currently running.

And the control part 190 discriminate | determines whether the difference of the legal speed S2 and the vehicle speed S1 acquired through ECU210 has exceeded the predetermined threshold D (step S32). The predetermined threshold D may be zero.

When it is determined that the difference exceeds the threshold value D (step S32; YES), the control unit 190 displays the icon V1c illustrated in FIG. 7B in the first display area A1 (step S33). . At this time, the control unit 190 may continue or cancel the display of the icon V2c. The icon V1c is a kind of symbol indicating the legal speed of the road that is currently running, and the display size is larger than the icon V2c. Note that the threshold value D is not an instantaneous value, and may be an average value for a certain period of time, for example.

On the other hand, if the difference is equal to or smaller than the threshold value D, the control unit 190 returns to step S31 and repeats a series of processes (step S32; NO). At this time, if the icon V1c is displayed, the control unit 190 cancels the display of the icon V1c. By this display processing, the driver E is warned that the speed is exceeded.

In the present embodiment, icons for display control are not limited to the icons V1a, V2a, and the like. For example, when the hazard lamp is lit, an icon V1d indicating that the hazard lamp is lit as illustrated in FIG. 8A is displayed in the first display area A1, and after a predetermined time has elapsed, FIG. The icon V2d having a display size smaller than the icon V1d with the same design as the icon V1d illustrated in FIG.

In the present embodiment, at the timing when the ignition of the vehicle is turned on, an icon indicating information related to the vehicle, for example, an icon (not shown) indicating the remaining amount of fuel is displayed in the first display area A1 for a predetermined time. Thereafter, an icon (not shown) indicating the remaining amount of fuel may also be displayed in the second display area A2.

In the present embodiment, the HUD device 100 has been described as an example including one display device 120, but the present invention is not limited thereto, and for example, two display devices 120 may be provided.

The present invention can be applied to a vehicle head-up display device.

100 Head-up display device (HUD device)
110 Housing 111 Opening 112 Cover 120 Display 130 Fold Mirror 140 Imaging Position Adjustment Mirror 150 First Screen 160 Second Screen 170 Plane Mirror 180 Concave Mirror 190 Control Unit 200 Sensor Group 210 ECU
220 Sound generator 300 Windshield A1 First display area A2 Second display area V1 First virtual image V2 Second virtual images V1a, V1b, V1c, V2a, V2b, V2c Icons L1, L2, N1, N2 Display light E Driver

Claims

A head-up display device that displays symbols representing information in a first display area and a second display area that are displayed at different distances as viewed from a viewer,
The symbol is displayed in the first display area, and the symbol is then displayed in the second display area and at a position different from the position displayed in the first display area as viewed from the viewer. A control unit for displaying,
Head-up display device.
The symbol is a symbol representing information for requesting the viewer to correct the state of the vehicle,
The control unit displays the symbol again in the first display area when the vehicle state is not corrected after the symbol is displayed in the second display area.
The head-up display device according to claim 1.
The first and second display areas are formed at positions that do not overlap each other when viewed from the viewer.
The first display area has a larger display area than the second display area,
Setting the size of the symbol displayed in the first display area to be larger than the size of the symbol displayed in the second display area;
The head-up display device according to claim 1.
When the control unit displays the symbol displayed in the first display region in the second display region, the control unit displays the symbol from the first display region to the second display when viewed from the viewer. Display to move gradually into the area,
The head up display apparatus of any one of Claim 1 to 3.
The control unit changes the size of the symbol when displaying the symbol displayed in the first display region in the second display region.
The head up display apparatus of any one of Claim 1 to 4.
A sound generator for generating sound;
The control unit generates a sound according to a display position of the symbol through the sound generation unit when displaying the symbol displayed in the first display region in the second display region.
The head up display apparatus of any one of Claim 1 to 5.
A sound generator for generating sound;
The control unit generates different sounds through the sound generation unit according to the moving direction of the symbol when moving the symbol.
The head-up display device according to claim 4.