JP6541013B2 - Head-up display device - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a head-up display device that displays effects in transition between a stop state and an operating state.

  As a conventional head-up display device, the position of the reflection means for reflecting display light to the projection member is moved to a position where sunlight does not enter the display in the housing through the reflection means in the stopped state where the device is not used In the operating state, it is configured to return from the position of the stopped state, and in a situation where the head-up display device is not used, the possibility that sunlight may enter the display in the housing via the reflecting means and deteriorate is reduced. For example, Patent Document 1 and Patent Document 2 disclose ones.

  When the head-up display device of Patent Document 1 transitions from the stop state to the operating state, the position of the reflection means can be adjusted by operating the operation switch, and the moving speed of the reflection means by the operation of the operation switch can be adjusted. By rapidly setting the moving speed to move from the closed state to the open state along with the start of use, the time from the stop state to the operation state to display the virtual image is shortened.

  In the head-up display device of Patent Document 2, for example, a display image consisting of "Good-Bye" disappears while moving from the operating state to the stopping state, and the light source is stably ended. It is directing time for.

JP, 2005-208436, A JP, 2013-164482, A

  However, in the head-up display device of Patent Document 1, since the display is started after movement from the stop state to the operation state is completed, the virtual image is displayed from the stop state to the passenger without feeling discomfort. Time has not been staged.

  Further, in the head-up display device of Patent Document 2, the effect when transitioning from the stopped state to the operating state is not taken into consideration, and there is room for improvement in the effect when transitioning from the operating state to the stopped state.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a head-up display device that produces time for transition between a stop state and an operation state.

The head-up display device A according to the present invention is
A projection target member,
Display means 3 for emitting display light L;
A reflecting mirror 5 for reflecting the display light L;
Drive means 50 for rotating the reflecting mirror 5 to change the angle at which the display light L is reflected;
The driving means 50 and the display means 3 are controlled to irradiate the display light L reflected by the reflecting mirror 5 to the projection target member, and the virtual image V is viewed by the passenger of the vehicle via the projection target member Control means 6, and
While the control means 6 is in the operating state in which the reflecting mirror 5 reflects the display light L toward the projection target member, the movable range 5b to 5d of the operating state is accompanied by the rotation of the reflecting mirror 5. The display unit 3 displays the current position at

In addition, the head-up display device A according to the present invention
The control means 6 causes the display means 3 to indicate the current position by indicating a scale 820 indicating the operating ranges 5b to 5d.

In addition, the head-up display device A according to the present invention
When the position of the reflecting mirror 5 changes, the control means 6 causes the display means 3 to display the current position for a fixed time.

  According to the present invention, it is possible to provide a head-up display device with high added value by presenting the time required for transition between the stop state and the operating state.

It is an installation view of a head up display device concerning an embodiment of the present invention. It is a structure schematic of the embodiment. Parts (a) to (d) of the figure show the optical paths of the display light L or the sunlight SL when the concave mirror 5 is positioned at the positions 5a to 5d, respectively. It is a figure which shows the virtual image display range of the embodiment. (A) to (d) of the figure show the display positions of the virtual image V when the concave mirror 5 is positioned at the positions 5a to 5d, respectively. It is an electrical block diagram of the embodiment. It is a figure which shows the rotation mechanism of the concave mirror of the embodiment. (A) to (d) of the figure show the state of the drive mechanism when the concave mirror 5 is positioned at the positions 5a to 5d, respectively. It is a flowchart figure which shows rotation control of the concave mirror of the embodiment. It is a figure which shows the 1st display example of the embodiment. (A) to (d) of the figure show the states of the virtual image V and the display light L when the concave mirror 5 is positioned at the positions 5a to 5d, respectively. It is a figure which shows the 2nd display example of the embodiment. (A) to (d) of the figure show the states of the virtual image V and the display light L when the concave mirror 5 is positioned at the positions 5a to 5d, respectively.

  Hereinafter, based on an accompanying drawing, the embodiment which applied the present invention to the head up display device carried in vehicles is described.

  A head-up display device A according to the present invention mainly includes a light source 1, a condenser lens 2, a liquid crystal display panel 3, a plane mirror 4, a concave mirror 5, a control means 6, and a housing 7 for housing these. Configured The head-up display device A reflects the display light L emitted from the display (display means) comprising the light source 1, the condenser lens 2 and the liquid crystal display panel 3 according to the control of the control means 6 and reflects the plane mirror 4 and the concave mirror 5. Then, the light is emitted from the emission port 70 of the housing 7. By projecting the display light L emitted from the emission port 70 on the windshield (projected member) of the vehicle, the virtual image V is viewed superimposed on the landscape in front of the windshield from the viewpoint E of the passenger.

The light source 1 is, for example, a light emitting element that emits a light beam such as an LED, is mounted on an alumina (ceramics) substrate excellent in thermal conductivity, and lights up with an arbitrary brightness according to control of the control means 6 described later.
The condenser lens 2 is made of an optical resin, and is formed of a convex lens having a function of condensing the light beam emitted from the light source 1 and converting it into parallel light.
The liquid crystal display panel 3 is a display panel in which polarizing plates are attached to the front and back sides of a liquid crystal cell in which a liquid crystal layer is sealed on a pair of translucent substrates on which transparent electrode films are formed. Display the image accordingly.
The light beam emitted from the light source 1 is collimated by the condenser lens 2 and the liquid crystal display panel 3 displaying the image is illuminated from the back side to display light L from the display consisting of the light source 1, the condenser lens 2 and the liquid crystal display panel 3 Is emitted.

  The flat mirror 4 is a reflecting mirror in which a metal such as aluminum is vapor-deposited on a resin material such as polycarbonate, for example, to form a flat reflecting surface. By increasing the optical path length of the display light L by the plane mirror 4, the distance from the windshield to the virtual image V can be increased, and by imaging the virtual image V further away, it is harmonized with the forward confirmation at the time of operation It becomes information display.

  The concave mirror 5 is a reflecting mirror in which a metal such as aluminum is vapor-deposited on a resin material such as polycarbonate, for example, to form a concave reflecting surface. The concave mirror 5 has a function of enlarging the display light L emitted by the display and a function of correcting the distortion of the display light L due to the curved surface of the windshield with a concave curved surface.

  The concave mirror 5 can rotate the positions of the concave mirrors 5a to 5d, for example, by a drive mechanism 50 including a lead screw mechanism moving with rotational power such as a stepping motor. The drive mechanism 50 is provided with a switch 51 which is pressed when the concave mirror 5 comes to the position 5a. The drive mechanism 50 is controlled by the control means 6 described later, and determines where the concave mirror 5 is located by counting the number of drive steps of the stepping motor with the point at which the switch 51 is pressed as a reference position (origin). Can.

When the concave mirror 5 is at the position 5a, as shown in FIG. 2A, the display light L does not form a virtual image on the windshield, and the sunlight SL reflects the concave mirror 5 to reach the display Since the head up display device A is not in operation, the head up display device A is in the stop state. By turning the concave mirror 5 to the position 5a, it is possible to reduce the possibility of deterioration of the display due to the sunlight SL when the head-up display A is not in use (for example, while the vehicle is parked and stopped). .
When the concave mirror 5 is at the positions 5b, 5c, 5d, as shown in FIG. 2 (b), the display light Lb, Lc, Ld has a suitable appearance when viewed from the viewpoints Eb, Ec, Ed on the windshield. Is formed as a virtual image Vb at a position where the head-up display device A is in operation. By turning the concave mirror 5 to the positions 5b to 5d when the head-up display device A is in operation, the virtual image V can be displayed at an arbitrary position in the virtual image display range Vb2d. The display can be adjusted to an appropriate appearance between the viewpoints Eb to Ed.

  The control means 6 is, for example, a rigid circuit board on which a storage device, an arithmetic device, and an input / output interface are mounted, and is electrically connected to the light source 1, the liquid crystal display panel 3, the drive means 50, the switch 51 and the in-vehicle network LAN. There is. The control means 6 inputs various information of the vehicle (for example, traveling speed of the vehicle, engine speed, gear position, route guidance information, etc.) from the in-vehicle network LAN, and controls the light source 1 and the liquid crystal display panel 3 to The various information 80 is emitted from the display as the display light L, and is made visible to the passenger as the virtual image V.

  The control means 6 rotates the concave mirror 5 to any position of positions 5b to 5d by, for example, an operation switch (not shown) mounted on the steering of the vehicle when the head-up display device A is in operation. And store the position as an initial operating position.

  Next, rotation control of the concave mirror and display control of the display will be described.

(Step S1)
The control means 6 performs an opening effect in which the head-up display device A returns to the operating state from the stopped state. The control means 6 performs a zeroing operation to rotate the concave mirror 5 to the position 5a (origin) before the opening effect. After the zeroing operation, the control means 6 rotates the concave mirror 5 to the operation initial position, and changes the display mode of the display according to the position of the concave mirror 5. After finishing the opening effect, the control means 6 proceeds to step S2. This opening effect will be described below as an opening effect example 1 (FIG. 7) and an opening effect example 2 (FIG. 8) when the operation initial position is set as the position 5d.

(Opening example 1)
An opening effect example 1 is shown in FIG. (A) to (d) of the figure show the states of the virtual image V and the display light L when the concave mirror 5 is positioned at the positions 5a to 5d, respectively. In the case where the operation initial position is set as the position 5d The opening effect transitions in the order of FIGS. 7 (a), (b), (b t c), (c), (c t d), and (d).
First, when the concave mirror 5 is at the position 5a, the control means 6 hides the display. Next, the control means 6 rotates the position of the concave mirror 5 from 5a to 5d to correspond to the current position of the concave mirror 5 more than the lower end Ve of the virtual image vd corresponding to the position 5d set as the operation initial position. When the upper end of the display range of the virtual image to be displayed is located at the top, a display obtained by, for example, the logical product of the display design of the character string consisting of "WELCOME" with the display range of the virtual image corresponding to the current position of the concave mirror 5 Display in the range Vf. Note that the control means 6 sets the rotation speed while the virtual image V is not displayed faster than the rotation speed while the virtual image V is displayed when rotating the position of the concave mirror 5 from 5a to 5d. And shorten the period until the virtual image V is displayed. The rotational speed of the concave mirror 5 during display of the virtual image V is noise due to resonance between the cycle of the drive pulse of the stepping motor used for the drive means 50 and the surrounding members (for example, the lead screw mechanism and the case 7). It is preferable to determine in consideration of the occurrence. Then, when the movement of the concave mirror 5 to the position 5 d set as the operation initial position is completed, the control means 6 proceeds to step S2.

(Opening example 2)
An opening effect example 2 is shown in FIG. (A) to (d) of the figure show the states of the virtual image V and the display light L when the concave mirror 5 is positioned at the positions 5a to 5d, respectively, in the case where the operation initial position is set as the position 6d. The opening effect transitions in the order of FIGS. 8 (a), (b), (b t c), (c), (c t d), and (d).
First, when the concave mirror 5 is at the position 5a, the control means 6 hides the display. Next, the control means 6 starts turning the position of the concave mirror 5 from 5a to 5d, and when it reaches the position 5b which is the closest position to the stopped state in the operating state, the movable range in the operating state of the concave mirror 5 The display of the current position of the concave mirror 5 is started by the scale 820, the current position 821 and the set position 822. A scale 820 has a design formed over a virtual image range Vcd corresponding to the movable range in the operating state, and at each position of the concave mirror 5, a part thereof is displayed by the virtual image. The current position 821 and the set position 822 are, for example, a design combining an arrow pointing to the position of the scale 820 and a character string “NOW” or “SET” indicating the current position or the set position. When the upper end of the display range of the virtual image corresponding to the current position of the concave mirror 5 is located above the lower end of the virtual image vd corresponding to the position 5 d set as the operation initial position, the control means 6 For example, the travel distance of the vehicle, the traveling speed, the remaining fuel, and the like are various information 80 of the vehicle as various information of the vehicle in the display range Vf obtained by ANDing the display range of the virtual image corresponding to the current position of the concave mirror 5 When displaying as, in the order of the remaining fuel, the traveling distance of the vehicle, and the traveling speed, the display items are increased and displayed in order as the display range Vf is expanded. Then, when the movement of the concave mirror 5 to the position 5 d set as the operation initial position is completed, the control means 6 proceeds to step S2.

(Step S2)
The control means 6 periodically updates and displays the various information 80 of the vehicle according to the input from the in-vehicle network LAN until there is a request for transition to the stop state. The control means 6 determines, for example, that the vehicle has parked or stopped based on the state that the ignition of the vehicle is off, the gear position of the vehicle is parking, etc., and makes it a transition request to the stop state. The control means 6 proceeds to step S3 when there is a request for transition to the stop state.

(Step S3)
The control means 6 performs an ending effect in which the head-up display device A transitions from the operating state to the stopping state. The control means 6 starts turning from the current position of the concave mirror 5 to the position 5a (origin), and performs ending effect to perform effects in the reverse order to the opening effect. It is needless to say that, when performing effects in the reverse order of the opening effects shown in FIG. 7, it is better to replace the effect design of the character string consisting of "WELCOME" with a character string consisting of "GOOD-BYE".

  The embodiments of the present invention have been described above. By configuring in this manner, it is possible to provide a high value-added head-up display device by presenting the time required for the transition between the stop state and the operation state.

  Further, compared with the prior art in which the display is started after the movement from the stop state to the operation state is completed, since the display is started at an early stage, the rider feels that the start up time of the head-up display device A is short. Specifically, in contrast to the opening effect example 1 (FIG. 7) in the case where the operation initial position is set as the position 5d, conventionally, the display has been performed after the concave mirror has moved to the position 5d. In contrast to this, in the embodiment of the present invention, the display is started at a position c before the position 5 d. Further, in the opening effect example 2 (FIG. 8), the display is started at a position b before the position 5 d, and the rider feels that the head-up display device has been activated in a shorter time.

  Further, as shown in the second example of presentation (FIG. 8), by displaying the current position of the concave mirror 5 in the movable range of the concave mirror 5 in the operating state, the passenger can switch between the stop state and the operating state. Since there is no indication during transition between the stop state and the operating state, since it can be known during the transition between the stop state and the operating state how and how the position of the concave mirror 5 is set from where to where I do not feel bored compared to.

  And, as shown in the first production example (FIG. 7), when the control means 6 rotates the position of the concave mirror 5 from 5a to 5d, the virtual image V is not displayed while the virtual image V is displayed. By setting the rotation speed faster than the display time of, the time until the virtual image V is displayed can be shortened.

  Note that various improvements and design changes can be made without departing from the scope of the present invention. For example, the projected member is not limited to the windshield of a vehicle, and may be a combiner or the like.

  Although the position of the concave mirror 5 corresponding to the stopped state is configured to be pivoted to the position 5b side in the range from the position 5b to 5d in the operating state, the present invention is not limited thereto. A position where light SL is not irradiated to the display may be stopped.

  Further, the current position of the concave mirror 5 in the movable range in the operating state of the concave mirror 5 is displayed for a certain period of time in response to a change in the position of the concave mirror 5 other than displaying during transition between the stopped state and the operating state. You may

  The present invention is suitable as a display device for a vehicle mounted on a vehicle.

1: light source 2: condenser lens 3: liquid crystal display panel 4: plane mirror 5: concave mirror 6: control means 7: case 70: exit 80: vehicle information 81: effect design 820: scale 821: current position 822: setting position A : Head-up display device E: View point L: Display light V: Virtual image

Claims (3)

A projection target member,
Display means for emitting display light;
A reflecting mirror that reflects the display light;
Driving means for rotating the reflecting mirror to change the angle of reflection of the display light;
A control unit that controls the drive unit and the display unit to irradiate the display light reflected by the reflecting mirror onto the projection target to cause a passenger of a vehicle to visually recognize a virtual image through the projection projection; Equipped with
The control means displays the current position within the movable range of the operating state as the reflecting mirror rotates while the reflecting mirror is in the operating state of reflecting the display light toward the projection target member. A head-up display device characterized by being displayed on The head-up display device according to claim 1, wherein the control means causes the display means to indicate the current position by pointing a scale indicating the operating range . The head-up display device according to claim 1, wherein the control means causes the display means to display the current position for a certain period of time when the position of the reflecting mirror changes .

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