JPH075886U - Vehicle display - Google Patents

Abstract

(57) [Abstract] [Purpose] By controlling the opening / closing member, transmission blocking of the display light is selected, and thereby any one of a plurality of virtual images having different imaging distances is formed. Provided is a display device for a vehicle, which performs a display suitable for. A vehicle which is installed in a vehicle compartment and irradiates a reflecting member 7 installed in front of a driver 8 with a display light 5 from a display 4 to form a virtual image 9 in front of the driver 8. Display device. The display 4 has a wide directivity, and the optical member 6 has a plurality of virtual images 9 and different imaging distances L.
a and Lb having different types of mirrors 6a and 6b
The display light 5 between the optical member 6 and the reflecting member 7.
An opening / closing member 10 is provided to control the permeation cutoff.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicular display device, and in particular, a so-called head-up display in which display light from a display is reflected by a reflecting member in front of a driver to form a virtual image in the front of the driver's visual field. The present invention relates to a display device for a vehicle.

[0002]

[Prior art]

 In recent years, various head-up displays have been proposed and put into practical use as display devices for vehicles, in which driving information from a display device is imaged as a virtual image in front of the driver. Some are described in Japanese Patent No. 85224.

FIG. 3 shows a conventional example, 1 is a windshield, 2 is a projector embedded in a dashboard 3, and this projector 2 is a display device 4 such as a dot matrix type LCD or a CRT, and this display. The display light 5 includes an optical member 6 such as a mirror and a lens that guides the display light 5 from the device 4 in a predetermined direction. The display light 5 is reflected toward the driver 8 by a reflecting member 7 which is a combiner provided on the inner surface of the windshield 1. The virtual image 9 formed in front of the driver 8 in the visual field (for example, 2 m ahead) is viewed by the driver 8 as driving information.

[0004]

[Problems to be solved by the device]

 By the way, the conventional image forming position of the virtual image 9, that is, the display position is constant. For this reason, it is not possible to respond to changes in the running state, that is, when the focus of the driver 8 is moved away with the increase in the running speed of the vehicle, the difference between the focus of the driver 8 and the display position of the virtual image 9 is large. As a result, the virtual image 9 becomes harder to see as the traveling speed increases, which causes a problem. In addition, depending on the display contents, the display position may be easier for the driver 8 to see near, or conversely, it may be easier for the driver to see far away. For example, it is necessary to make the contents such as letters and numbers legible. The latter is desirable so that the display position is close to the focal point during driving, and the former is suitable for giving powerful display when the pattern recognition such as a figure is sufficient.

For the purpose of eliminating such a problem, the display position of the virtual image 9 is changed, for example, as disclosed in Jitsukai 61-133125, 61-134437, 63-45526 and 63-45526. Although disclosed in each publication of 63-72238, there is a problem that the structure becomes large.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention illuminates a display member installed in a vehicle compartment with an optical member to a reflecting member installed in front of a driver to form a virtual image in front of the driver. In the vehicular display device for image formation, the display has a wide directivity, and the optical member uses different types of mirrors so that the virtual images have a plurality of different image forming distances. An opening / closing member that controls blocking of transmission of the display light is provided between the reflecting member and the reflecting member.

[0007]

[Action]

 By controlling the opening / closing member, blocking of transmission of display light is selected, and thereby any one of a plurality of virtual images having different image forming distances is imaged, and a virtual image suitable for a running state and display contents can be obtained. .

[0008]

【Example】

 The present invention will be described based on the embodiments shown in FIGS. It should be noted that the same or corresponding parts as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows a configuration of a projector 2 which is a main part of the embodiment, and includes a display device 4, an optical member 6 and an opening / closing member 10.

The display device 4 uses, for example, a CRT having a wide directivity, is electrically connected to a drive circuit and a sensor (not shown), and emits vehicle driving information as display light 5.

The optical member 6 is composed of two mirrors 6a and 6b, one of which is an ordinary flat plate and one of which is concave, and the latter 6b is arranged in front of the former 6a. The display light 5 from the display 4 is received and reflected toward the reflection member 7.

The opening / closing member 10 is provided between the optical member 10 and the reflecting member 7, and is displayed by the mirrors 6 a and 6 b corresponding to the mirrors 6 a and 6 b of the optical member 6. The LCD 5 is composed of two LCDs 10a and 10b so that the light 5 can be transmitted and blocked individually. The transmission is blocked by changing the light transmittance under the control of a drive circuit (not shown).

With such a configuration, when the traveling speed of the vehicle is low, for example, by selecting the LCD 10a in the open state and the LCD 10b in the closed state, the display light 5 from the display 4 is only reflected by the mirror 6a. Is transmitted through the LCD 10a and irradiated on the reflecting member 7, a virtual image 9a is formed in front of the driver 8, and when the traveling speed is high, by selecting the LCD 10b in the open state and the LCD 10a in the closed state, The display light 5 from the display device 4 can be controlled so that only the light reflected by the mirror 6b passes through the LCD 10b and is irradiated on the reflecting member 7, and the virtual image 9b is formed in front of the driver 8. In this case, since the optical path of the display light 5 is long and the mirror 6b is concave, the image forming position La of the virtual image 9a and the image forming position Lb of the virtual image 9b are La (for example, 2 m) <Lb (for example, 5 m). Therefore, it is possible to obtain an easy-to-see display position according to the traveling speed.

Alternatively, as shown in FIG. 2, when a pattern such as a figure that is sufficient for pattern recognition is displayed, a virtual image 9a (FIG. 2 (a)), a character, a number, or the like, which is close to a powerful display, is displayed. When displaying the contents whose contents need to be read, the virtual images 9b (Fig. 2 (b)) far from each other are selected so that the display position is close to the focus during driving. It is also possible to obtain a display position that is easy to see.

The present invention can be variously modified without departing from the scope of the invention. For example, the opening / closing member 10 can be composed of a single LCD, or a machine such as a mechanical louver that can be opened / closed. It is also possible to control the blocking of the transmission of the display light 5 as a purpose.

In addition to irradiating the same reflecting member 7 with the display light 5 to form a virtual image 9 (9a, 9b), as shown in Japanese Utility Model Laid-Open No. 2-112536, the reflecting member 7 is formed. Part of the display light from the mirrors 6a and 6b is provided on the inner surface of the windshield 1 and partly between the windshield 1 and the driver 8 independently of each other. 5 may be configured to be received.

In addition, it is conceivable that a portion of the reflection member 7 that receives the display light 5 reflected by the mirror 6b has a large incident angle and is not reflected in the direction of the driver 8. As shown in the publication, by using a holographic member capable of differentiating the incident angle and the reflection angle as the reflecting member 7, the reflection angle can be set to a desired angle without depending on the incident angle. it can.

[0018]

[Effect of device]

 The present invention relates to a display device for a vehicle, which is installed in a vehicle compartment and irradiates display light from a display device to a reflecting member installed in front of a driver by an optical member to form a virtual image in front of the driver. The display has a wide directivity, the optical member uses mirrors of different types so that the virtual image has a plurality of different image forming distances, and the optical member and the reflecting member are provided with the mirror. An opening / closing member for controlling transmission / blocking of display light is provided, and transmission / blocking of display light is selected by control of the opening / closing member, thereby forming one of multiple virtual images having different image forming distances. It is possible to obtain a virtual image suitable for changes in running conditions and display contents. In particular, since it does not have a large-scale operation, it is extremely effective in practical use because it does not require a large configuration and can be easily realized.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a display example of the same embodiment.

FIG. 3 is a schematic diagram showing a configuration of a conventional example.

[Explanation of symbols]

 4 Display 5 Display light 6 Optical member 6a Flat mirror 6b Concave mirror 7 Reflecting member 8 Driver 9 Virtual image 9a Near virtual image 9b Far virtual image 10 Opening / closing member 10a LCD 10b LCD

Claims (1)

[Scope of utility model registration request] 1. A display device for a vehicle, which is installed in a vehicle compartment and irradiates a reflection member installed in front of a driver with display light from a display device by an optical member to form a virtual image in front of the driver. The display has a wide directivity, the optical member uses different kinds of mirrors so that the virtual images have a plurality of different image forming distances, and the display is provided between the optical member and the reflecting member. An on-vehicle display device comprising an opening / closing member for controlling light transmission blocking.