JPS62169882A - Combiner for head-up display - Google Patents

Abstract

PURPOSE:To obtain the titled combiner which allows a color to be extinguished against a dark background, provides a vivid color even against a bright background, and has a long life, by forming a photochromic layer comprising a specified indolespironaphthoxazine on a transparent reflecting plate which reflects a display image. CONSTITUTION:A photochromic layer comprising an indolespironaphthoxazine of the formula (where R1-3 are each lower alkyl; X1-2 are each H, OH, lower alkoxy or halogen; X3-4 are each H, lower alkyl, lower alkoxy, halogen, nitro or cyano) which is an organic compound having a spiro carbon atom is formed on the inside, the outside or both sides, or in the inner part of a colorless or colored transparent reflecting plate which reflects a display image, for example, as a film 7 made by dissolving the spiro compound in a high-molecular matrix or by bonding a film 8 containing the spiro compound through an adhesive layer 9 or as a layer 10 impregnated with the spiro compound.

Description

[Detailed Description of the Invention] (Industrial Application Field) This 5M light is a head-up display computer I
Section 1 Medical Pain ``View Six Moment Definition A- (Prior Art) As a conventional combiner, there is one used in a head-up display for automobiles as shown in the 1st FA. is the front window, and 4 is the driver's eyes. 2 is the combiner, and by light from below, display images such as speed, fuel, etc. are reflected and reflected to the driver's eyes 4. The combiner has a reflective coating 5 on its surface.
is coated to make the reflected image easier to see. Furthermore, the colored transparent plate 2 is used so that the display image 8 can be seen even in bright conditions such as a road with a whitish background.

(Problems to be Solved by the Invention) However, in such conventional combiners, colored glass with a constant UA degree is always used as the colored transparent plate, and because it is one knee, it cannot be used inside a tunnel or against a dark background. In this case, it became difficult to see the front through the colored combiner. Conversely, in the case of an extremely bright background such as a snowy road, the displayed image cannot be seen because the density cannot be increased beyond a certain level. There was also an idea to use a photochromic combiner as a colored combiner, but there was a problem in that the response of the conventional 7-otochromic agent was too slow to be of practical use.

(Means for Solving the Problems) The present invention solves the above-mentioned problems by forming 7 otochromic layers of a specific organic compound having spirocarbon on the inner surface, outer surface, both surfaces, or inside of a transparent reflector that reflects a displayed image. This solves the problem.

In this invention, as an organic compound having spiro carbon, the following formula (wherein (7) R, , R2, R8 are lower alkyl groups,
, , x, l are a hydrogen atom, a hydroxyl group, a lower alkoxy group or a halogen atom, X8. An indole spironaphthoxazine represented by X represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a nitro group or a cyan group is used.

(Function) In the combiner of the present invention, a colorless or colored transparent plate is used as a transparent reflecting plate for reflecting a displayed image, and a photochromic layer of indole spironaphthoxazine of formula (1) is provided on the reflecting plate, as required. In addition, by providing an increased reflection film, the photochromic layer of Funbeiner is colored in bright daytime areas, and the absorption interval of the coloring is 0.
Since the absorbance is 2 or more, the transmitted light is significantly reduced, and therefore the displayed image can be seen even when the background is extremely bright such as a snowy road.On the other hand, in dark places such as inside a tunnel or at night, the absorbance is 0.
．． 05 or less and the coloring disappears in 2 to 8 seconds, ensuring sufficient forward visibility beyond the combiner.

Regarding these effects, A. Conventional colored combiner, B.
Combiner using dithizone-based photochromic material,
The performance of the combiner of the invention was evaluated and the results are shown in Table 1. Conventional colored combiners have the above-mentioned problems, and the fastest response speed of combiners using dithizone-based photochromic materials takes only 20 seconds to color and about 1 minute to decolor, so decoloring takes a long time in tunnels. There is a problem that they do not meet in time and visibility is poor. However, the combiner of the present invention solves these problems.

(Example) Next, the present invention will be explained by way of examples with reference to the drawings.

As a first example, a combiner having a photochromic layer of indole spironaphthoxazine of formula (1) on one surface of a transparent reflector was used as the combiner 2 in FIG. 1, and the other components were the same. Figure 2 (a
), (b) and (0) are diagrams showing various examples of the combiner 2. The combiner shown in FIG. Natsutooxazine coating liquid,
It has an indole spironaphthoxazine film 7 obtained by coating to a thickness of 10 μm. The coated side of this gland can be either the windshield side or the driver side. The transparent body 6 may be made of transparent plastic such as polymethyl methacrylate (PMMA), polycarbonate (PC), polysal 7one (PSF), polystyrene (PS), transparent nylon, or inorganic glass. Moreover, it may be colorless or colored.

Furthermore, as shown in FIG. 2), a film 8 containing indole spironaphthoxazine may be attached to the transparent body 6 via an adhesive layer 9.

Further, as shown in FIG. 2(C), an indole spironut oxazine impregnated layer 10 may be provided on the surface of the transparent body 6.

Furthermore, although not shown, a layer of indolespironaphthoxazine may be provided in the middle of the transparent body 6.

FIG. 8(a) is a diagram showing a head-up display for an automobile according to a second embodiment of the present invention. An example using a window-integrated combiner is shown below. In FIG. 3(a), a part of the front window 1 is coated with indolespironaphthoxazine dissolved in a polymer matrix as shown in FIG. 2(a), and the naphthoxazine film 7 is installed in the combiner. is formed. In this case, the front rear glass functions as the transparent plate.

In the illustrated example, the naphthoxazine film is provided on a portion of the front window, but it may be provided on the entire front window.

In the example shown in FIG. 8(a), the naphthoxazine@7 is provided on the indoor side, but it can also be provided on the outdoor side.

Furthermore, a naphthoxazine film may be used in combination with the naphthoxazine film, and the naphthoxazine film may be provided above or below the naphthoxazine film, or on the opposite side of the naphthoxazine film.

In addition, as shown in FIG. 8(b), a naphthoxazine layer may be provided between the laminated glasses 18 and 18. That is, as shown in FIG. ) A naphthoxazine layer 12 formed by coating a polymeric film with a polymeric solution of naphthoxazine is sandwiched through a membrane 11, and the naphthoxazine layer 12 may be dyed and sandwiched between the polymeric films. It is possible to coat it directly, or it can also be used by dispersing it in an adhesive layer.

(Effects of the Invention) As explained above, the funbiner for head-up displays of the present invention is provided by providing a photochromic layer of indole spironaphthoxazine of the formula (1) on a transparent reflecting plate that reflects a displayed image. , because the color disappears quickly in a tunnel or against a dark background, forward visibility is ensured, a sufficiently clear display image is ensured even when the background is extremely bright such as on a snowy road, and the repeat life of the photochromic layer is significantly improved. It has the effect of withstanding the lifespan of the car (10 years) and further improving the design.

[Brief explanation of drawings]

FIG. 1 is a layout diagram of an automobile head-up display equipped with an example of a combiner, FIGS. 2(a), (b) and (0) are side views of an example of a combiner of the present invention, and FIG. 8(a) FIG. 8 is a layout diagram of another example of an automobile head-up display equipped with the combiner of the present invention.
b) is a sectional view of a combiner according to another example of the invention. 1... Front window 2... Combiner having a colored transparent plate or indole spironaphthoxazine 8... Display image 4... Driver's eyes 5...
Reflection-enhancing film 6... Transparent body 7... Indole spironaphthoxazine film dissolved in a polymer matrix 8... Film 9 containing indole spironaphthoxazine
... Adhesive layer 10 ... Indole spironaphthoxazine impregnated layer 1
1...Polyvinyl butyral layer 12...Polymer support indole spironaphthoxazine layer 13...Inorganic glass Patent applicant Nissan Motor Co., Ltd. Figure 1 Figure 2 (C) 2222'

Claims (1)

[Claims] 1. A transparent reflecting plate that reflects a displayed image has the following formula ▲ Numerical formula, chemical formula, table, etc. ▼ (1) (In the formula, R_1, R_2, R_3 are lower alkyl groups,
_1, X_2 represent a hydrogen atom, hydroxyl group, lower alkoxy group or halogen atom, X_3, X_4 represent a hydrogen atom, lower alkyl group, lower alkoxy group, halogen atom, nitro group or cyano group). A compiler for head-up displays with a photochromic layer.