JPH0618392Y2 - Display device - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial field of application) This invention relates to a display device used for a vehicle-mounted instrument panel, etc., and more specifically, a visual confirmation at night by giving a three-dimensional effect by a fluorescent pattern The present invention relates to a display device having improved performance.

(Prior Art) As a vehicle-mounted instrument panel, for example, a panel (a dial) coated with a phosphor and irradiated with excitation light such as ultraviolet rays at night to improve visibility is known. Kaisho 62-813
4 publication).

However, the display panel was flat, and even if the phosphor was made to emit light with excitation light, it was only slightly visible, and the visual sensation of the hands, etc., was monotonous, with no significant difference between daytime and nighttime. .

In addition, it is proposed that the display panel itself is formed in a concave shape, but in this case, there is a stereoscopic effect both in the daytime and at night, and the visual sensation of the hands and the like is large between daytime and nighttime. There was no difference and it was monotonous as well.

Therefore, as shown in FIG. 4 and FIG.
It is considered that the fluorescent pattern 320 is formed on the substrate, and the emission density of the fluorescent pattern 320 is roughened at the central portion of the display panel 300 and dense at the peripheral portion. That is, a printed layer 321 of phosphor (UV ink) is formed on the entire surface of the display board 300, and the printed layer 321 is formed.
An absorber 310 that does not emit light due to excitation light is provided on the display panel 30.
The halftone dot printing is performed so that the density gradually increases from the central portion to the peripheral portion (see FIG. 5).

In this way, although the display panel 300 looks like a flat surface in the daytime, when the excitation light is irradiated at night, the fluorescent pattern 320 emits light so that the display panel 300 looks like a concave surface due to the difference in emission density. There is a big difference between time,
It is possible to eliminate the monotonousity as in the past.

(Problems to be solved by the invention) However, since the phosphor forming the fluorescent pattern 300 has only one emission color, there is little change and only a slight stereoscopic effect is obtained, and the sufficient effect cannot be obtained. It was

This invention eliminates the above-mentioned drawbacks of the prior art, and the purpose thereof is to provide a display device that can obtain a sufficient three-dimensional effect and that causes a large difference in the visual sense of the pointer and the like between daytime and nighttime. Is to provide.

[Constitution of device]

(Means for Solving the Problem) In order to achieve the above object, in the display device of the present invention, a plurality of fluorescent patterns having different emission colors are formed on the display panel, and the emission density of these fluorescent patterns is determined by the display panel. By changing from the central part to the peripheral part, irradiating excitation light from a single light source, and making each of the fluorescent patterns emit light at the same time, the display panel has a three-dimensional effect with a wide variety of changes. It is characterized by having done.

(Operation) During the daytime, there is no change in the fluorescence pattern, and the display panel looks flat. When illuminated with excitation light at night, several types of fluorescent patterns with different emission colors each emit light. At this time, the change in emission density of the fluorescent patterns causes a color change (gradation), which gives a three-dimensional appearance to the display panel. .

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment in which the display device of the present invention is applied to a vehicle-mounted instrument panel. In the figure, reference numeral 10 is an end piece,
A cover 20 made of a transparent glass plate is attached to the front surface thereof, a display board (clockface) 30 is attached to the rear surface thereof, and a black light for irradiating the display board 30 with ultraviolet rays 41 as excitation light is further provided above the cover. UV lamp 4
0 is attached. A case 50 is mounted on the back side of the dial 10, and a movement 70 for driving a pointer 60 arranged on the front surface of the display panel 30 is mounted in the case 50.

The display board 30 has a disk shape, and a base layer 31 colored with a pigment is provided on the surface thereof, and two types of fluorescent patterns 32 and 33 having different emission colors are formed on the base layer 31, respectively. One of the fluorescent patterns 32, 33 is the fluorescent material (UV ink) 3
2a is formed by halftone printing on the base layer 31, and the other fluorescent pattern 33 is formed by halftone printing another fluorescent substance (UV ink) 33a having a different emission color on the base layer 31. (See FIGS. 2 (a), (b) and FIG. 3), it has the transparency under visible light or the same color as the base layer 31. That is, during the daytime when the ultraviolet lamp 40 is not irradiated, the base layer 31
Is visually recognized, or the same color as the base layer 31 is visually recognized.

Here, the fluorescent pattern 32 and the fluorescent pattern 33 have a negative and positive relationship. That is, as shown in FIG. 2 (a), the phosphor 32a is halftone-dot printed so that the emission density of the phosphor 32a sequentially changes from the central portion to the peripheral portion of the display panel 30 to form the fluorescent pattern 32. Thereafter, in order to form an inverted image of the fluorescent pattern 32, the fluorescent body 33a is dot-printed so that the emission density of the fluorescent body 33a sequentially changes from the central portion of the display panel 30 toward the peripheral portion thereof to form the fluorescent pattern 33. (See FIG. 2B).

By doing so, the display panel 30 colored with the pigment of the base layer 31 looks like a flat surface in the daytime. When the ultraviolet lamp 40 is turned on and the display panel 30 is irradiated with the ultraviolet rays 41 at night, the fluorescent patterns 32 and 33 emit light, respectively. At this time, the phosphor 32a of the fluorescent pattern 32
Of the fluorescent pattern 33 and the color of the fluorescent material 33a of the fluorescent pattern 33 are different from each other.
A change in color (gradation) occurs due to a change in the light emission density from the central portion of the display panel 30 to the peripheral portion of the display panels 2 and 33, and the display panel 30 has a stereoscopic effect due to the change in color.

This three-dimensional effect is caused by the change in color caused by the change in the emission density of each of the two colors, and is richer in change than that caused by the change in the emission density of a single color. The senses change greatly.

In addition, although the case where the ultraviolet ray 41 is used as the excitation light is shown in the above-mentioned embodiment, an X-ray may be used.
Although the case where the two-color fluorescent patterns 32 and 33 are formed is shown, three-color, four-color fluorescent patterns may be formed. Further, although the case where the fluorescent patterns 32 and 33 are formed in the relationship of negative and positive is shown, the present invention is not limited to this, and the fluorescent patterns 32 and 33 are formed according to a desired three-dimensional effect.

[Effect of device]

As described above, according to the present invention, a plurality of fluorescent patterns having different emission colors are formed, and the emission density of these fluorescent patterns is changed from the central portion of the display panel toward the peripheral portion. A color change occurs when each pattern is made to emit light at the same time, and because this color change gives a three-dimensional effect, it is richer in change than when a single color gives a three-dimensional effect by changing the emission density of the fluorescent pattern. A sufficient three-dimensional effect can be obtained, and an effect such as a large difference in the visual sense of the hands and the like between daytime and nighttime can be obtained. In addition, since excitation light from a single light source can give a color change and a three-dimensional effect, it does not cause problems such as an increase in the size of the device, an increase in the number of parts, and an increase in cost, and labor can be saved. is there.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a sectional view, FIGS. 2 (a) and 2 (b) are explanatory views for explaining a method for forming a fluorescent pattern, FIG. 3 is a partially enlarged sectional view of a display panel, and FIGS. FIG. 4 shows a prior art, FIG. 4 is a front view of a display panel portion, and FIG. 5 is A of FIG.
It is a sectional view taken along line A-A. 30 ... Display panel 32, 33 ... Fluorescent pattern 32a, 33a ... Phosphor

Claims (1)

[Scope of utility model registration request] 1. A plurality of fluorescent patterns having different emission colors are formed on a display panel, and the emission density of these fluorescent patterns is changed from the central portion to the peripheral portion of the display panel, and a single light source is used. A display device, characterized in that the display panel has a three-dimensional effect with various changes by irradiating excitation light and causing each of the fluorescent patterns to emit light at the same time.