JPH04181284A - Illuminating display device - Google Patents

Abstract

PURPOSE:To legibly illuminate a display part without having irregularities by diffusing light beams from a light source by means of a sheet having a transparent glass and then, advancing them in a prescribed direction with a directional member. CONSTITUTION:The light beams of a lamp 7 are diffused by a sheet having the transparent glass 13, then, polarized by an LCF 12, and refracted downward by a light transmission member 6, to be projected toward the upper light. On the other hand, the light beams of a lamp 16 are diffused by a sheet having the transparent glass 21, and then, polarized by an LCF 20, and advance toward the upper right. The light beams polarized by the LCF 12 are refracted downward by the light transmission member 6. However, since the polarizing angle of the LCF 12 is made different from that of the LCF 20 a little, the light beams of the lamp 7 and the lamp 16 advance toward the same direction, that is, the eyes' position of an operator, as well. In other words, the light beams of the lamp 7 and 16 advance only toward the direction of the operator, so that display parts 11 and 19 can be legibly viewed and recognized from the direction where the eyes of the operator are positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in an illumination display device used for a switch knob of an automobile, etc.

(Prior art) Conventionally, lighting for switch knobs, etc. has been done by transmitting light from a light source such as a lamp installed behind the switch knob through a display section formed by cutting out letters from a coating film on a semi-transparent member. By this, the display section is illuminated.

(Problem to be solved by the invention) However, the switch of a car is installed near the center of the panel, and the light that passes through the display part of the switch knob is dispersed, and the dispersed light is reflected on the windshield and door windows, causing problems when driving. There was a problem in that the lights were visible to drivers and passengers, creating a glare that was dangerous for driving.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an illumination display device whose display portion can be clearly viewed day and night.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention allows light from an internal light source to pass through to illuminate a display portion formed by cutting out a coating film on the surface of a transparent member for display. In such a lighting display device, there is a directional member that projects light from the light source in the same direction, a half mirror layer with high light reflectance, and a half mirror layer that is placed on the back side of the directional member to diffuse the light from the light source. It is equipped with a transparent glass-filled sheet.

In the first embodiment, the half mirror layer is formed on the front surface of the display transparent member, and in the second embodiment, the half mirror layer is formed on the back surface of the display transparent member.

(Function) During the daytime, external light is reflected by the half-mirror layer, so the display section appears silvery-white, and at night, illumination light is irradiated only in the direction of the driver by the directional translucent member.

(Example) Next, an example of the present invention will be described in more detail with reference to the drawings.

1 to 5 are diagrams showing a first embodiment of the present invention, in which 1 is an air conditioner switch 2 that drives an air control device and an economy switch 3 that limits the operating time of the compressor. Presentation/Misui γchi,
4 is a case, 5 is an operating knob that operates the air conditioner switch 2, 6 is a transparent member (transparent display member) that is the base of the operating knob 5, and 7 is attached to a printed board 8 housed in the case 4. It is a lamp as a light source. Translucent member 6
A half-mirror layer 9 with high reflectivity is deposited on the surface of the display section 11, which is then coated by vacuum deposition or the like, and this coating film 10 is cut with a laser to form the letters A/C, which means air conditioner. is provided.

Then, on the back side of the light-transmitting member 6, there is a directional member that polarizes the incident light and emits the light only in a predetermined direction.
A member I2 called CF (light control film) is provided.

Further, a transparent glass-containing sheet 13 for diffusing the light from the lamp 7 is attached to the back side of the LCF 12.

Reference numeral 14 indicates an operating knob for operating the economy switch 3, 15 indicates a transparent member which is the base of the operating knob 14, and 16 indicates a lamp. A half mirror layer 17 is also formed on the surface of this transparent member 15.
After vapor-depositing, a film is applied by vacuum evaporation etc., and this coating film 18
A display section 19 is provided in which the letters ECO, which means economy, are formed by laser cutting the display section 19 , and an LCF 20 is disposed on the back side of the light-transmitting member 15 . And LCF2
A transparent glass-containing sheet 21 is attached to the back side of 0.

Opaque cases 22, 23 are provided at the rear ends of the operating knobs 5, 14, respectively, and the engagements 124, 25 of the knob cases 22, 23 are connected to the air conditioner switch body 26.
The air conditioner switch body 26. engages with the driving portion 28.29 of the economy switch body 27. It operates the switch body 27 for economy.

The light from the lamp 7 in this embodiment is transmitted to the transparent glass-containing sheet 1
After being diffused by the light beam 3, the light is polarized by the LCF 12, and refracted slightly downward by the light transmitting member 6, and then the light is projected in the upper right corner as shown in FIG. Further, the light from the lamp 16 is diffused by a transparent glass-containing sheet 21, and then polarized by the LCF 20 so as to travel toward the upper right.

Note that the light polarized by the LCF 12 is refracted slightly downward by the transparent member 6, but in this embodiment, the LCF
The polarization angle of No. 12 is made slightly similar to the polarization angle of t and cF20, so that the light from lamp 7 and the light from lamp 16 travel in the same direction, which is the position of the driver's eyes.

That is, since the light from the lamps 7 and 16 travels only in the direction of the driver, the display sections 11 and 19 can be clearly viewed from the direction where the driver's eyes are located.

In addition, since the light from the lamps 7.16 is diffused by the transparent glass-containing sheet 13.21, the display is uneven (the lamps 7 and 16 are not directly visible. For example, compared to milky white film, the light attenuation rate is very small, so the lamp 7.16
In order to efficiently irradiate the light from the lamp 7,
I6 can be made small, and power consumption and heat generation can be suppressed.

In addition, since the surfaces of the light-transmitting members 6 and 15 are mirror-deposited, the dark interior cannot be seen from the display section 11.19 during the daytime, and external light passes through the half-mirror layer 9.19. Display unit 11 reflected by I7
;19 appears silvery white, and the display can be clearly seen.

FIG. 6 is a diagram showing a second embodiment of the present invention, in which the light-transmitting member 3
A half-mirror layer 31 is deposited on the back surface of 0.
The surface of the light-transmitting member 30 is directly coated with a film by vacuum deposition or the like, and this coating film 32 is cut with a laser to form a display section 33. An LCF 34 is disposed on the back surface of the light-transmitting member 30, and a transparent glass-containing sheet 35 is attached to the back surface of the LCF 34. In this embodiment, as in the first embodiment, light from a lamp (not shown) is diffused by a transparent glass-containing sheet 35, then polarized by an LCF 34 so that it travels only in a predetermined direction, and then passes through a half mirror layer 31. The light is slightly refracted by the light-transmitting member 30 and passes through the display section 33 in the upper right direction, that is, in the direction where the driver is located.

Note that since the back surface of the light-transmitting member 30 is mirror-deposited, the dark interior cannot be seen from the display section 33 during the daytime, and external light is reflected on the half mirror layer 31 and passes through the light-transmitting member 30 to the display section 33. Since the light is irradiated from above, the display section 33 appears silvery white, and the display can be clearly seen.

In addition, in each of the above-mentioned Examples, for the sake of explanation, the mirror layer, coating film, etc. are clearly shown with a considerable thickness.
In reality, the mirror layer is less than 1 micron, and the coating film is 10
It is about several microns in size.

(Effects of the Invention) As is clear from the above description, according to the present invention, the light from the light source is diffused by the sheet containing transparent glass and then travels in a predetermined direction by the directional member. The display area is illuminated evenly and clearly. Since the light from the light source becomes a substantially parallel beam using the directional member and travels in a fixed direction, it is not dispersed, there is no need to increase the amount of light from the light source more than necessary, and the light does not reflect on the window. It has the effect of avoiding glare, etc. Also, since it has a half-mirror layer with high reflectance, the interior cannot be seen during the day, and outside light is reflected on the half-mirror layer. Since it can be seen from the display section, it has the effect that the display can be clearly viewed.

[Brief explanation of the drawing]

Fig. 1 is a front view of an air conditioner/economy switch using the present invention, Fig. 2 is a sectional view taken along line AA in Fig. 2, Fig. 3 is a sectional view taken along line BB in Fig. 2, and Fig. 4. , FIG. 5 is a sectional view of the main part of the first embodiment of the present invention, and FIG. 6 is a sectional view of the main part of the second embodiment of the invention. 4... Case, 5.14... Operation knob, 6.15.
30... Translucent member, 7.16... Lamp, 9.17
・31...Half mirror layer, IO・18・32...
Paint film, 11/19/33...Display section, 12/20/3
4...LCF, 13/21/35...Sheet containing transparent glass. Patent Applicant Nishin Co., Ltd. No. 1 Fig. A″'94 No. 2 I”1 Fig. 3 Fig. 4 Fig. 5 Giant 1 Fig. 6

Claims (1)

[Claims] (1) In an illumination display device that transmits light from an internal light source and illuminates a display area formed by cutting out a coating film on the surface of a transparent display member, the light from the light source is directed in the same direction. It is characterized by comprising a directional member that projects light, a half mirror layer with high light reflectance, and a transparent glass-containing sheet that is disposed on the back side of the directional member and diffuses light from the light source. Lighting display device.