JP2516438B2 - Head-up display device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a head-up display device for displaying various vehicle information by reflecting and projecting it on a combiner such as a windshield.

(Prior Art) Vehicle speed, mileage, remaining fuel amount, and other driving information were displayed by a meter or the like provided on the instrument panel.
In order to allow the driver to visually recognize this driving information recently, the driving information is imaged in the front field of view of the windshield so that it does not have to miss the front field of view, and it is viewed so as to overlap with the foreground in the field of view. A capable head-up display device is used.

This head-up display device includes a windshield or a half mirror or the like (hereinafter referred to as a combiner) provided on the inner surface of the lower portion of the windshield, which is a separate light emitting display unit for performing light emitting display, such as a fluorescent display tube system, a light emitting diode display system, Display light from a display device such as a transmissive liquid crystal display system is reflected and projected on a reflective display unit including the combiner to allow a driver to visually recognize a predetermined display (for example, Japanese Patent Publication No.
15072 publication).

(Problems to be Solved by the Invention) In the above-described conventional head-up display device, the smoke plate for protecting the light emitting display unit is provided above the light emitting display unit. For this reason, the display light of the light emitting display unit enters the driver's eyes through the smoke plate, and since this display light changes corresponding to the upper part to be displayed, it is necessary to always give a flicker feeling to the driver's field of view. become.

Further, when the reflective display portion is formed on the windshield, the curvature of the central portion of the windshield differs from that of the left and right peripheral portions, so the reflected light in the driver direction becomes unbalanced, and the display is difficult for the driver to see.

(Means for Solving the Problem) In view of the above problems, the present invention provides a light shielding screen instead of the conventional smoke plate.

That is, the head-up display device according to the present invention is
A light-emitting display unit for displaying various driving information to the driver,
In a head-up display composed of a reflective display unit for reflecting display light from the light emitting display unit on a combiner such as a windshield, a driver is provided above the light emitting display unit according to the curvature of the combiner. The louver angle is changed to a multi-stage light-shielding screen portion at an angle that blocks light leakage of the light emitted from the light-emitting display portion in a direction and makes the reflected light of the combiner uniform in the driver's direction. It is a thing. .

(Operation) The display light from the light emitting display section has directivity in the louver angle direction of the light-shielding screen of the light-shielding screen section, and the directivity is determined according to the curvature of the combiner. Only a well-balanced and uniform virtual image displayed on the combiner can be visually recognized.

(Example) Next, the Example of this invention is described.

A head-up display device that is an embodiment of the present invention includes a light emitting display unit 1, a light shielding screen unit 2, and a reflective display unit 3 that is a combiner using a windshield of a vehicle.
The display unit 1 includes a transmitted light type liquid crystal display 11 and a light emission source 12, and the processing unit (CPU) 14 appropriately processes the information of the sensor 13 installed at each position of the vehicle to display the display unit. The one that drives 11.

The light-shielding screen portion 2 is formed by inclining the light-shielding screen 2 at a predetermined louver angle Θ1 inside a base plate (acrylic resin plate) 22. Corresponding to the reflection angle of), for example, when the driver is on the right seat, the light-shielding screen 21 is divided into nine parts 21a to 21i, and as shown in FIG. 3, 24 °, 27 °, 27 ° from the left side, 27 °, 28 ° 28 °, 28
It is provided like ゜, 22 ゜, 18 ゜.

This louver angle Θ1 is larger in the central portion than in the left and right peripheral portions because the inclination angle (curvature) of the windshield that serves as a combiner in a general vehicle is larger in the central portion than in the left and right peripheral portions. Corresponding to the curvature of the combiner so as to eliminate the imbalance of the reflection of the display light from the display unit 1 due to the difference, the display light from the display unit 1 is reflected to the driver substantially uniformly over the entire area of the combiner. Is set so that Naturally, the louver angle Θ1 varies depending on the vehicle type.

Thus, the display light transmitted through the display 11 is a transparent screen.
It is made to have directivity (has directivity in the sense that light in a predetermined direction is blocked) by 21 and is reflected and displayed on the reflective display section (combiner) 3 to inform the driver of predetermined driving information. As shown in FIG. 2, since the louver angle Θ1 of the light-shielding screen 21 does not coincide with the angle Θ2 formed by the point and the driver's eye position,
Of the light from the light-emitting display unit 1, the driver sees only driving information other than the reflected virtual image, and no flicker is generated. Further, since the louver angle Θ1 is determined in accordance with the reflection angle of the display light of the reflective display section (the windshield used as a combiner) 3, the reflected display light is made uniform, and a more readable display can be obtained. It is a thing.

Although a transmissive liquid crystal display type display is used as the display 11 in the above embodiment, other fluorescent display tube type or light emitting diode display type displays may be used. As for the light-shielding screen portion, the specific material and structure thereof can be arbitrarily determined as long as the light-shielding screen having a predetermined louver angle can be provided.

(Effect of the Invention) As described above, in the head-up display device according to the present invention, the light-shielding screen unit is provided between the light-emitting display unit and the reflective display unit, and the louver angle of the light-shielding screen is set to the curvature of the reflective display unit. It is changed correspondingly, the driver can see the displayed items on the reflective display part surely, and since the display light from the light emitting display part does not directly enter the eyes of the driver, It has no flicker and contributes to safe driving.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a simplified block diagram of the entire apparatus, FIG. 2 is a sectional view of a light-shielding screen portion, and FIG.
The figure shows the same plan view. 1 is a light emitting display unit 11 is a display unit 12 is a light emitting light source 13 is a sensor 14 is a processing unit 2 is a light-shielding screen unit 21 is a light-shielding screen 22 is a base plate 3 is a reflective display unit (combiner)

Claims (1)

(57) [Claims] 1. A head-up display comprising a light-emitting display unit for displaying various driving information to a driver and a reflective display unit for displaying display light from the light-emitting display unit on a combiner such as a windshield. In the upper part of the light emitting display part, the light leakage of the light emitted from the light emitting display part toward the driver is blocked in accordance with the curvature of the combiner, and the reflected light of the combiner is made uniform toward the driver. A head-up display device, characterized in that a light-shielding screen portion in which the louver angle is changed in multiple stages is provided for the angle.