Display device for vehicle

Abstract

To provide a display device for a vehicle which enables even an occupant other than a driver to visually recognize a high-quality reflected image.SOLUTION: A vehicle display device 1 includes a display device main body 3 including a display unit 31 and a case 33 that houses the display unit 31, and causes a passenger to visually recognize display light emitted by the display unit 31 by reflecting the display light on a windshield 22 of a vehicle 2, and includes a direction changing part 4 that changes a direction of the display device main body 3, and the direction changing part 4 changes the direction of the display device main body 3 in a vehicle width direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a display device for a vehicle. [Background technology]

[0002] BACKGROUND ART A vehicle display device is known in which display light emitted by a display unit is reflected on the windshield of the vehicle so that it can be visually recognized by a passenger (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-86514 Summary of the Invention [Problem to be solved by the invention]

[0004] However, this type of vehicle display device forms display light based on the viewpoint from the driver's seat, and the reflected light is primarily visible to the driver, so passengers other than the driver may see a distorted reflected image, leaving room for improvement.

[0005] Therefore, an object of the present disclosure is to provide a vehicle display device that allows passengers other than the driver to view a high-quality reflected image. [Means for solving the problem]

[0006] In one aspect, the following solution is provided. A display device for a vehicle includes a display device main body including a display unit and a case that houses the display unit, and the display light emitted by the display unit is reflected on a windshield of the vehicle so that the display light is visible to a passenger, an orientation change unit that changes the orientation of the display device main body; The orientation change unit changes the orientation of the display device main body in the vehicle width direction. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a vehicle display device that allows passengers other than the driver to view a high-quality reflected image. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic side view of a main part of a vehicle equipped with a vehicle display device according to an embodiment of the present disclosure. [Figure 2] 1 is a schematic cross-sectional view of a display device for a vehicle. [Figure 3] 10A and 10B are schematic perspective views showing an operation of changing the orientation of the display device main body. [Figure 4] 1 is a schematic perspective view of a main part of the interior of a vehicle, showing a state in which the display device main body is oriented toward the driver's seat. FIG. [Figure 5] 1 is a schematic perspective view of a main part of a vehicle interior showing a state in which the display device main body is oriented toward the passenger seat side. FIG. [Figure 6] FIG. 2 is a block diagram showing a control configuration of the vehicle display device. [Figure 7] 1 is a schematic plan view of the main parts of the interior of a vehicle, showing a state in which the display device main body is oriented toward the driver's seat. FIG. [Figure 8] 1 is a schematic plan view of the main parts of the interior of a vehicle, showing a state in which the display device main body is oriented toward the passenger seat. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings.

[0010] [Vehicle display device] FIG. 1 is a schematic side view of a main part of a vehicle 2 equipped with a vehicle display device 1 according to an embodiment of the present disclosure. As shown in FIG. 1, the vehicle display device 1 is mounted on an instrument panel 21 of a vehicle 2, projects display light L onto a windshield 22, and allows a reflected image G to be visually recognized by a passenger.

[0011] The projection position (reflection position) on the windshield 22 may be a transparent transmission portion 22a or a light-shielding light-shielding portion 22b. For example, the light-shielding portion 22b formed on the lower end of the windshield 22 is configured as a portion coated with black ceramic by baking. The vehicle display device 1 may also include an optical system including a concave mirror for magnifying the display or a mirror for projecting a virtual image into the distance. The vehicle display device 1 may also be a windshield display (WSD) using the light-shielding portion 22b or a head-up display (HUD) using the transmission portion 22a. The vehicle display device 1 may be installed not only in automobiles but also in motorcycles, ships, agricultural machinery, construction machinery, etc.

[0012] FIG. 2 is a schematic cross-sectional view of the vehicle display device 1. As shown in FIG. As shown in FIGS. 1 and 2, the vehicle display device 1 includes a display device main body 3 and a direction changing unit 4.

[0013] [Display device body] As shown in FIG. 2, the display device main body 3 includes a display unit 31, a display light control layer 32, a case 33, and a protective cover .

[0014] The display unit 31 includes a display panel 311 and a backlight unit 312 .

[0015] The display panel 311 is configured, for example, by a TFT (Thin Film Transistor) type liquid crystal display panel (LCD: Liquid Crystal Display). The display panel 311 is controlled by a graphic controller or the like of a circuit board (not shown) connected via a flexible substrate (not shown), and a drive voltage is applied to the liquid crystal layer via transparent electrodes. The liquid crystal layer forms a display image by controlling the orientation of liquid crystal molecules and changing the transmittance of each pixel.

[0016] The backlight unit 312 is disposed behind the display panel 311. The backlight unit 312 includes a light source substrate 312a and an optical sheet 312b. A plurality of light-emitting elements (LEDs) 312c are mounted on the light source substrate 312a. The light source substrate 312a is connected to the circuit board described above via a flexible substrate. The light-emitting elements 312c emit light when a drive current is supplied. The optical sheet 312b is, for example, a prism sheet that diffuses light. The light emitted from the light-emitting elements 312c passes through the optical sheet 312b and illuminates the display panel 311. As a result, the display unit 311 emits a display image as display light L to be viewed by a viewer.

[0017] The display light control layer 32 is disposed between the protective cover 34 and the display unit 31, and controls the direction of the transmitted display light L. The display light control layer 32 is a film-like member having a base, a refractive portion, and a film, and is made of transparent synthetic resins with different refractive indices. To prevent rainbow unevenness when wearing polarized sunglasses, it is preferable that the layer be made of PMMA, polycarbonate, TAC, or the like, which has low retardation (phase difference).

[0018] The display light control layer 32 is fixed to the protective cover 34 on the emission surface 321 side via an optical bonding layer 323 (adhesive layer). The optical bonding layer 323 is made of a transparent synthetic resin (for example, a silicone-based, urethane-based, or acrylic-based resin). The display light control layer 32 is fixed to the display panel 311 on the incidence surface 322 side via an adhesive layer 324 (adhesive layer) made of an adhesive material.

[0019] The case 33 houses the display unit 31. The case 33 is made of, for example, a light-blocking synthetic resin. The case 33 has an opening 331 in a portion facing the windshield 22 that allows display light L to pass through.

[0020] The protective cover 34 is a plate-like member made of a transparent material such as PMMA, soda lime glass, etc. The protective cover 34 covers the opening 331 of the case 33, thereby protecting the display unit 31 inside the case 33 from moisture, dust, etc.

[0021] [Orientation change section] FIG. 3 is a schematic perspective view showing the direction change operation of the display device main body 3. As shown in FIG. 2 and 3, the orientation change unit 4 is provided between the display device main body 3 and the mounting unit 23 on the vehicle 2 side, and enables changing the orientation of the display device main body 3. The orientation change unit 4 changes the orientation of the display device main body 3 in the vehicle width direction.

[0022] For example, as shown in Fig. 3, the orientation change unit 4 changes the orientation of the display device main body 3 in the vehicle width direction by moving the display device main body 3 along an arc B centered on an axis A that is perpendicular to the vehicle width direction and parallel to the display surface of the display unit 31. Such an orientation change unit 4 can be configured, for example, by a rotation support mechanism using bearings such as a goniostage. Note that Figs. 1 to 3 show the orientation change unit 4 schematically.

[0023] The orientation change unit 4 includes a drive mechanism 41 (see FIG. 6) that changes the orientation of the display device main body 3 based on the drive of a power source (not shown). The power source of the drive mechanism 41 is, for example, an electric motor, and changes the orientation of the display device main body 3 via a transmission mechanism such as a gear transmission mechanism or a belt transmission mechanism. The drive mechanism 41 also fixes the orientation of the display device main body 3 based on the stopping of the drive of the power source. For example, the movement of the display device main body 3 is locked by utilizing a brake function of the electric motor or the transmission mechanism.

[0024] Figure 4 is a schematic oblique view of the main parts of the interior of the vehicle, showing the display device main body 3 facing the driver's seat side, and Figure 5 is a schematic oblique view of the main parts of the interior of the vehicle, showing the display device main body 3 facing the passenger seat side. 4 and 5, the display device main body 3 of this embodiment is disposed in the vehicle width direction between the driver's seat (not shown) and passenger seat (not shown) of the vehicle 2. The vehicle 2 shown in Figs. 4 and 5 is a left-hand drive vehicle, with the driver's seat located behind the steering wheel 24 and the passenger seat located to the right of the driver's seat.

[0025] The states of the orientation change unit 4 include a state in which the orientation of the display device main body 3 is aligned with the driver's seat side (see FIG. 4) and a state in which the orientation is aligned with the passenger's seat side (see FIG. 5). When the orientation of the display device main body 3 is aligned with the driver's seat side, it is possible to display a reflected image G that is clearly visible to the passenger (driver) sitting in the driver's seat. When the orientation of the display device main body 3 is aligned with the passenger's seat side, it is possible to display a reflected image G that is clearly visible to the passenger sitting in the passenger seat. Note that the orientation of the display device main body 3 changed by the orientation change unit 4 is not limited to the orientation aligned with the driver's seat side and the passenger's seat side, but can be changed to any orientation. In either orientation, the movement of the display device main body 3 is locked by the drive mechanism 41, thereby suppressing vibration of the display device main body 3 and preventing shaking of the reflected image G.

[0026] [Drive control unit and display control unit] FIG. 6 is a block diagram showing the control configuration of the vehicle display device 1. As shown in FIG. 6, the vehicle display device 1 includes a drive control unit 5 and a display control unit 6. Both the drive control unit 5 and the display control unit 6 include a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The drive control unit 5 and the display control unit 6 perform predetermined processing according to a program written in the ROM.

[0027] The drive control unit 5 controls the drive mechanism 41. The drive control unit 5 controls the drive mechanism 41 based on predetermined conditions to automatically change the orientation of the display device main body 3. For example, the drive control unit 5 acquires various vehicle information from the ECU (Electronic Control Unit) 25 of the vehicle 2, and automatically changes the orientation of the display device main body 3 when the acquired vehicle information meets predetermined conditions. As a specific example, when a television image is displayed on the vehicular display device 1, the display device main body 3 is automatically oriented toward the passenger seat when the vehicle 2 is moving, so that a television image that can be clearly seen by the passenger sitting in the passenger seat is displayed. Furthermore, when the vehicle 2 is stopped, the display device main body 3 is automatically oriented toward the driver's seat, so that a television image that can be clearly seen by the passenger sitting in the driver's seat is displayed. The drive control unit 5 has an automatic mode and a manual mode, and in the manual mode, the orientation of the display device main body 3 is changed based on the passenger's operation.

[0028] Figure 7 is a schematic plan view of the main parts of the interior of the vehicle, showing the display device main body 3 facing the driver's seat side, and Figure 8 is a schematic plan view of the main parts of the interior of the vehicle, showing the display device main body 3 facing the passenger seat side. The display control unit 6 switches the display content using the display light L and corrects the display light L depending on the orientation of the display device main body 3. For example, when the orientation of the display device main body 3 is aligned with the driver's seat, the display control unit 6 causes the vehicular display device 1 to display content for the driver, such as navigation and vehicle information. Furthermore, when the orientation of the display device main body 3 is aligned with the driver's seat, the reflected image G seen from the driver's seat is not rectangular but has a distorted shape. In this case, as shown in FIG. 7, the display control unit 6 warps and corrects the display light L based on the viewpoint from the driver's seat, so that the reflected image G seen from the driver's seat has an appropriate shape.

[0029] Furthermore, when the orientation of the display device main body 3 is aligned with the passenger seat side, the display control unit 6 causes the vehicular display device 1 to display content intended for the passenger seat, such as entertainment images (for example, television images or online videos). When the orientation of the display device main body 3 is aligned with the passenger seat side, the reflected image G seen from the passenger seat side is not rectangular but has a distorted shape. In this case, as shown in FIG. 8, the display control unit 6 warps the display light L based on the viewpoint from the passenger seat side, so that the reflected image G seen from the passenger seat side has an appropriate shape.

[0030] Although the embodiments have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the claims. In addition, it is also possible to combine all or a plurality of components of the above-described embodiments.

[0031] The present invention includes the following embodiments.

[0032] [1] A vehicle display device comprising a display device main body including a display unit and a case for accommodating the display unit, wherein display light emitted by the display unit is reflected on the windshield of the vehicle so that it can be viewed by a passenger, an orientation change unit that changes the orientation of the display device main body; The orientation change unit changes the orientation of the display device main body in a vehicle width direction.

[0033] [2] The display device main body is disposed between a driver's seat and a passenger seat of the vehicle in the vehicle width direction, The vehicle display device according to [1], wherein the orientation change unit changes the orientation of the display device body to include a state in which the orientation is aligned with the driver's seat side and a state in which the orientation is aligned with the passenger's seat side.

[0034] [3] The vehicle display device described in [1] or [2], wherein the orientation change unit moves the display device main body along an arc centered on an axis perpendicular to the vehicle width direction and parallel to the display surface of the display unit.

[0035] [4] The vehicle control device according to any one of [1] to [3], wherein the orientation change unit includes a drive mechanism that changes the orientation of the display device body based on the drive of a power source.

[0036] [5] The vehicle display device according to [4], wherein the drive mechanism fixes the orientation of the display device body when the drive of the power source is stopped.

[0037] [6] Further comprising a drive control unit that controls the drive mechanism, The vehicle display device according to [4] or [5], wherein the drive control unit automatically changes the orientation of the display device body based on a predetermined condition.

[0038] [7] Further comprising a display control unit that controls the display unit, The vehicle display device according to any one of [1] to [6], wherein the display control unit corrects the display light depending on the orientation of the display device main body.

[0039] [8] The display control unit When the orientation of the display device main body is aligned with the driver's seat side of the vehicle, warping correction is performed on the display light based on a viewpoint from the driver's seat side; The vehicle display device according to [7], wherein when the orientation of the display device main body is aligned with the passenger seat side of the vehicle, the display light is warped and corrected based on the viewpoint from the passenger seat side. [Explanation of symbols]

[0040] 1. Vehicle display device 2 vehicles 21 Instrument panel 22 Windshield 22a Transparent part 22b Light shielding part 23 Mounting part 24 Steering wheel 25 ECU 3 Display device body 31 Display unit 311 Display Panel 312 Backlight Unit 312a light source board 312b Optical Sheet 312c Light-emitting element 32 Display light control layer 321 Exit Surface 322 Incidence plane 323 Optical Bonding Layer 324 Adhesive layer 33 cases 331 Aperture 34 Protective cover 4 Orientation change section 41 Drive mechanism 5 Drive control unit 6 Display control section L display light G reflection image A axis B Arc

Claims

1. A display device for a vehicle includes a display device main body including a display unit and a case that houses the display unit, and the display light emitted by the display unit is reflected on a windshield of the vehicle so that the display light is visible to a passenger, an orientation change unit that changes the orientation of the display device main body; The orientation change unit changes the orientation of the display device main body in a vehicle width direction.

2. the display device main body is disposed between a driver's seat and a passenger seat of the vehicle in the vehicle width direction, The vehicle display device according to claim 1 , wherein the orientation change unit changes the orientation of the display device body between a state where the orientation is aligned with the driver's seat side and a state where the orientation is aligned with the passenger's seat side.

3. The vehicle display device according to claim 1 , wherein the orientation changer moves the display device main body along an arc having an axis that is perpendicular to the vehicle width direction and parallel to a display surface of the display unit as a center.

4. The vehicle control device according to claim 1 , wherein the orientation change unit includes a drive mechanism that changes the orientation of the display device body based on the drive of a power source.

5. The display device for a vehicle according to claim 4 , wherein the drive mechanism fixes the orientation of the display device body when the driving of the power source is stopped.

6. a drive control unit that controls the drive mechanism; The display device for a vehicle according to claim 4 , wherein the drive control unit automatically changes the orientation of the display device body based on a predetermined condition.

7. a display control unit that controls the display unit; The display device for a vehicle according to claim 1 , wherein the display control unit corrects the display light in accordance with an orientation of the display device main body.

8. The display control unit When the orientation of the display device main body is aligned with the driver's seat side of the vehicle, warping correction is performed on the display light based on a viewpoint from the driver's seat side; The vehicle display device according to claim 7 , wherein when the display device main body is oriented toward a passenger seat side of the vehicle, the display light is warped and corrected based on a viewpoint from the passenger seat side.

Images