JP2018193060A - Head-up display device - Google Patents

Abstract

To provide a head-up display device which directs time necessary for transition between a stop state and an operative state.SOLUTION: A head-up display device A according to the invention comprises: a member to be projected; display means 3 which emits display light L; a reflection mirror 5 which reflects the display light L; drive means 50 which turns the reflection mirror 5, and changes an angle for reflecting the display light L; and control means 6 which controls the drive means 50 and the display means 3, radiates the display light L reflected by the reflection mirror 5 to the member to be projected, and makes an occupant of a vehicle visually confirm a virtual image V via the member to be projected. When the head-up display device is moved from one to the other between a first position 5a corresponding to a stop state and second positions 5b to 5d corresponding to an operative state accompanied by being transited between the stop state and the operative state, the control means 6 changes a display form of the display means 3 according to a position of the reflection mirror 5.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a head-up display device that displays effects in transition between a stopped state and an operating state.

  As a conventional head-up display device, the position of the reflecting means for reflecting the display light to the projection member is moved to a position where sunlight does not enter the display in the housing through the reflecting means in a stop state where the device is not used. In the operating state, it is configured to return from the position of the stop state, and in a situation where the head-up display device is not used, the possibility that sunlight is incident on the display in the housing through the reflecting means is reduced. The thing is disclosed by patent document 1 and patent document 2, for example.

  The head-up display device of Patent Document 1 can adjust the position of the reflecting means by operating the operation switch when transitioning from the stopped state to the operating state, and is faster than the moving speed of the reflecting means by operating the operation switch. By setting the moving speed to move from the closed state to the open state at the start of use, the time from returning from the stopped state to the operating state and displaying the virtual image is shortened.

  The head-up display device of Patent Document 2 displays, for example, a display image composed of “Good-Bye” disappears while moving from the operating state to the stopped state, and stably ends the light source. For the time.

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

  However, in the head-up display device of Patent Document 1, since the display is started after the movement from the stop state to the operation state is completed, the virtual image is displayed from the stop state without causing the passenger to feel uncomfortable. Time is not directed.

  In addition, the head-up display device disclosed in Patent Document 2 does not take into consideration the effect at the time of transition from the stopped state to the operating state, and there is room for improvement in the effect at the time of transition 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 required for transition between a stopped state and an operating state.

The head-up display device A according to the present invention includes:
A projected member;
Display means 3 for emitting display light L;
A reflecting mirror 5 that reflects 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 projection member with the display light L reflected by the reflecting mirror 5, and a vehicle occupant visually recognizes the virtual image V through the projection member. And control means 6 for causing
While the reflecting mirror 5 is in an operating state in which the display light L is reflected toward the projection member, the control means 6 is within the movable range 5b to 5d in the operating state as the reflecting mirror 5 rotates. Is displayed on the display means 3.

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

Moreover, the head-up display device A according to the present invention
When the position of the reflecting mirror 5 changes, the control means 6 displays the current position on the display means 3 for a predetermined time.

  ADVANTAGE OF THE INVENTION According to this invention, the time concerning transition between a stop state and an operation state can be produced and a head-up display apparatus with high added value can be provided.

It is a mounting diagram of a head-up display device according to an embodiment of the present invention. 2 is a schematic configuration diagram of the embodiment. FIG. (A)-(d) of the figure has shown the optical path of the display light L or sunlight SL when the concave mirror 5 is located in position 5a-5d, respectively. It is a figure which shows the virtual image display range of the embodiment. (A)-(d) of the figure has shown the display position of the virtual image V when the concave mirror 5 is located in position 5a-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) in FIG. 6 show the state of the drive mechanism when the concave mirror 5 is positioned at 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 FIG. 6 show the states of the virtual image V and the display light L when the concave mirror 5 is positioned at positions 5a to 5d, respectively. It is a figure which shows the 2nd display example of the embodiment. (A) to (d) of FIG. 6 show the states of the virtual image V and the display light L when the concave mirror 5 is positioned at positions 5a to 5d, respectively.

  Hereinafter, an embodiment in which the present invention is applied to a head-up display device mounted on a vehicle will be described with reference to the accompanying drawings.

  The head-up display device A according to the present invention is mainly composed of 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 them. Composed. The head-up display device A reflects the display light L emitted from the display (display means) including the light source 1, the condenser lens 2, and the liquid crystal display panel 3 through the plane mirror 4 and the concave mirror 5 under the control of the control means 6. Then, the light is emitted from the emission port 70 of the housing 7. The display light L emitted from the emission port 70 is projected onto the windshield (projected member) of the vehicle, so that the virtual image V is visually recognized by being superimposed on the scenery in front of the windshield from the viewpoint E of the passenger.

The light source 1 is a light emitting element that emits light, such as an LED, and is mounted on an alumina (ceramics) substrate having excellent thermal conductivity, and lights up with an arbitrary luminance in accordance with control of the control means 6 described later.
The condenser lens 2 is made of an optical resin and is a convex lens having a function of condensing the light emitted from the light source 1 and making it parallel light.
The liquid crystal display panel 3 is a display panel in which polarizing plates are attached to both front and rear surfaces of a liquid crystal cell in which a liquid crystal layer is sealed in a pair of transparent substrates on which a transparent electrode film is formed. Display an image accordingly.
The light beam emitted from the light source 1 is converted into parallel light by the condenser lens 2 and the liquid crystal display panel 3 displaying an image is illuminated from the back, so that the display light L from the display device including the light source 1, the condenser lens 2 and the liquid crystal display panel 3 is displayed. Is emitted.

  The plane mirror 4 is a reflecting mirror in which a planar reflecting surface is formed by evaporating a metal such as aluminum on a resin material such as polycarbonate. The distance from the windshield to the virtual image V can be increased by increasing the optical path length of the display light L by the plane mirror 4, and the virtual image V is formed at a farther distance, so that the front confirmation during driving is harmonized. Information display.

  The concave mirror 5 is a reflecting mirror in which a concave reflecting surface is formed by evaporating a metal such as aluminum on a resin material such as polycarbonate. The concave mirror 5 has a function of expanding the display light L emitted from the display device and a function of correcting distortion of the display light L due to the curved surface of the windshield with a concave curved surface.

  The concave mirror 5 is configured such that the concave mirror 5 can be rotated about the positions 5a to 5d by a drive mechanism 50 including a lead screw mechanism that moves with rotational power such as a stepping motor. The drive mechanism 50 is provided with a switch 51 that is pushed when the concave mirror 5 comes to the position 5a. The drive mechanism 50 is controlled by the control means 6 described later, and grasps where the concave mirror 5 is located by counting the number of drive steps of the stepping motor with the point where the switch 51 is pressed as the reference position (origin). Can do.

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 and reaches the display. Therefore, the head-up display device A is in a stopped state. When the concave mirror 5 is rotated to this position 5a, it is possible to reduce the possibility that the display unit is deteriorated by the sunlight SL when the head-up display A is not used (for example, while the vehicle is parked or stopped). .
When the concave mirror 5 is at the positions 5b, 5c, and 5d, as shown in FIG. 2B, the display light Lb, Lc, and Ld has a suitable appearance when viewed from the viewpoints Eb, Ec, and Ed on the windshield. An image is formed as a virtual image Vb at a position where the head-up display device A is in operation. When the head-up display device A is in an operating state, the virtual mirror V can be displayed at an arbitrary position in the virtual image display range Vb2d by rotating the concave mirror 5 to the positions 5b to 5d. It is possible to adjust the display to have 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 driving means 50, the switch 51, and the in-vehicle network LAN. Yes. The control means 6 inputs various types of vehicle information (for example, vehicle traveling speed, 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 control the vehicle. The information 80 is emitted from the display device as display light L, and is made visible to the passenger as a virtual image V.

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

  Next, the rotation control of the concave mirror and the 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 from the stopped state to the operating state. The control means 6 performs a zero return operation for rotating the concave mirror 5 to the position 5a (origin) before the opening effect. The control means 6 rotates the concave mirror 5 to the operation initial position after the nulling operation, and changes the display form 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 opening effect example 1 (FIG. 7) and opening effect example 2 (FIG. 8) when the operation initial position is set as position 5d.

(Opening production example 1)
FIG. 7 shows an opening effect example 1. (A) to (d) of FIG. 6 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 changes in the order of FIGS. 7A, 7B, 7B, 7C, 7C, 9D, and 9D.
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, and corresponds to the current position of the concave mirror 5 rather than the lower end Ve of the virtual image vd corresponding to the position 5d set as the operation initial position. If the upper end of the display range of the virtual image to be positioned is positioned above, for example, a display design obtained by ANDing the display design of the character string consisting of “WELCOME” with the display range and the display range of the virtual image corresponding to the current position of the concave mirror 5 Display in the range Vf. In addition, 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. The time until the virtual image V is displayed is shortened. The rotational speed of the concave mirror 5 during the display of the virtual image V is abnormal noise due to the period of the driving pulse of the stepping motor used in the driving means 50 and the resonance between the surrounding members (for example, the lead screw mechanism and the housing 7). It is preferable to determine in consideration of occurrence. Then, when the movement of the position of the concave mirror 5 to the position 5d set as the operation initial position is completed, the control means 6 proceeds to step S2.

(Opening production example 2)
FIG. 8 shows an opening effect example 2. (A) to (d) of FIG. 6 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 changes in the order of FIGS. 8 (a), (b), (b tic), (c), (ct 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 to rotate the position of the concave mirror 5 from 5a to 5d, and when it reaches the position 5b that is the position closest to the stopped state of the operating state, the movable range in the operating state of the concave mirror 5 is reached. 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. The scale 820 has a design formed over the virtual image range Vcd corresponding to the movable range in the operating state, and a part of the design is displayed as a virtual image at each position of the concave mirror 5. The current position 821 and the setting position 822 are, for example, a design in which an arrow indicating the position of the scale 820 and a character string “NOW” or “SET” in which the arrow indicates the current position or the setting position are combined. 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 5d set as the operation initial position, the control means 6 In the display range Vf obtained by the logical product with the display range of the virtual image corresponding to the current position of the concave mirror 5, for example, as the various vehicle information, the vehicle travel distance, the travel speed, the remaining fuel, etc. As the display range Vf widens, the display items are increased and displayed in order in the order of remaining fuel, vehicle travel distance, and travel speed. Then, when the movement of the position of the concave mirror 5 to the position 5d set as the operation initial position is completed, the control means 6 proceeds to step S2.

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

(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 stopped state. The control means 6 starts to turn from the current position of the concave mirror 5 to the position 5a (origin), and performs an ending effect that produces an effect in the reverse order of the opening effect. In the case where the effects are performed in the reverse order of the opening effects shown in FIG. 7, it is needless to say that it is better to replace the effect design of the character string consisting of “WELCOME” with the character string consisting of “GOOD-BYE”.

  The embodiments of the present invention have been described above. With this configuration, it is possible to provide a head-up display device with high added value by producing the time required for transition between the stopped state and the operating state.

  In addition, since the display is started at an earlier stage compared to the conventional technique in which the display is started after the movement from the stop state to the operation state is completed, the passenger feels that the startup time of the head-up display device A is short. Specifically, if compared with opening effect example 1 (FIG. 7) when the operation initial position is set as position 5d, conventionally, the display was made after the concave mirror moved to position 5d. In contrast, in the embodiment of the present invention, the display is started at the position c before the position 5d. Further, in the opening effect example 2 (FIG. 8), the display is started at the time point b before the position 5d, and the passenger feels that the head-up display device is activated in a shorter time.

  In addition, as shown in Production Example 2 (FIG. 8), by displaying the current position of the concave mirror 5 in the movable range in the operating state of the concave mirror 5, during the transition between the stopped state and the operating state, the passenger can When the position of the concave mirror 5 is set from where to where and how can be known during the transition between the stopped state and the operating state, there is no display during the transition between the stopped state and the operating state I don't feel bored.

  And as shown in the example 1 (FIG. 7), when the control means 6 rotates the position of the concave mirror 5 from 5a to 5d, the rotation speed while the virtual image V is not displayed is represented by the virtual image V. By setting it faster than the rotation speed while is displayed, the time until the virtual image V is displayed can be shortened.

  Various improvements and design changes can be made without departing from the gist of the present invention. For example, the projected member is not limited to a vehicle windshield, and may be a combiner.

  In addition, the position of the concave mirror 5 corresponding to the stopped state is configured to rotate to the position 5b side in the range of the operating state position 5b to 5d. A position where the light SL is not irradiated on the display device may be set to the stop state.

  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 when the position of the concave mirror 5 is changed, in addition to being displayed during the transition between the stopped state and the operating state. You may make it.

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

DESCRIPTION OF SYMBOLS 1: Light source 2: Condenser lens 3: Liquid crystal display panel 4: Plane mirror 5: Concave mirror 6: Control means 7: Case 70: Outlet 80: Vehicle information 81: Production 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 projected member;
Display means for emitting display light;
A reflecting mirror for reflecting the display light;
Driving means for changing the angle of reflecting the display light by rotating the reflecting mirror;
Control means for controlling the driving means and the display means to irradiate the projection member with the display light reflected by the reflecting mirror, and causing a vehicle occupant to visually recognize a virtual image via the projection member; With
While the reflecting mirror is in an operating state in which the reflecting mirror reflects the display light toward the projection member, the display means displays the current position within the operating range of the operating state as the reflecting mirror rotates. A head-up display device characterized by being displayed on the screen . The head-up display device according to claim 1, wherein the control unit causes the display unit to display the current position by indicating a scale indicating the operating range . 2. The head-up display device according to claim 1 , wherein when the position of the reflecting mirror is changed, the control unit displays the current position on the display unit for a predetermined time .

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