JPH0367756A - Back light panel able to be heated - Google Patents

Abstract

PURPOSE: To easily remove ice and snow by providing an intermediate layer, adopted as a back light panel suitable for a convertible vehicle and containing plural electric parts between two transparent plastic laminates, and transmitting heat energy to one laminate by energization. CONSTITUTION: This back light panel has a three-layer capacitor type structure energized by a power source 45, and the structure is constituted of two outer side layers composed of inside and outside flexible plastic laminates 22 and 24, and an intermediate layer 28, containing many electric elements electrically connected with each other, nipped between these two outside layers. Two facing electric wires 40 and 42 are electrically connected to plural and parallel electrically conductive members 50 at uniform intervals respectively, thereby converting electric energy into heat energy to be transmitted to the laminate 24 by energization to the conductive members 50.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention generally relates to a heatable back light (reversing light).
TECHNICAL FIELD The present invention relates to panels, and in particular to plastic composite backlight panels for compatible vehicles.

BACKGROUND OF THE INVENTION The use of heatable window assemblies to remove water and snow from aircraft and vehicle windows is known in the art.

U.S. Pat. No. 3,020,376 discloses a laminated plastic panel for aircraft that is electrically conductive to prevent ice and fog formation. In addition to the polyvinyl butyral sheet, the panel also includes a sealing layer,
Adhesive layer, 1! Includes an air temperature conductive layer, a second adhesive layer, and a protective layer. The electrically conductive layer is placed on the panel by a thermal evaporation method.

U.S. Pat. No. 3,041,436 includes a transparent electrically conductive window for aircraft for use in anti-fog and anti-icing applications. This window is protected from the exterior facing sheet, middle layer and interior layer. The inner surface of the outer sheet is electrically conductive! covered with things.

U.S. Pat. No. 3,180,781 relates to a composite laminate structure consisting of two sheets of rigid plastic sort inserted around the periphery of the sandwiched layers. This composite structure is primarily used on aircraft to prevent fog and icing. An undamaged electrically conductive film is part of the laminated sheet.
The laminated sheet consists of a set of layers placed on top of each other. The intervening layers include a sealing layer, an adhesive layer, a conductive film layer and a second adhesive layer.

U.S. Pat. No. 3,636,311 discloses a heating device for defrosting or de-icing automobile windows. A layer of electrically conductive material is pressed or sprayed onto the surface of the polyester resin sheet. A self-adhesive edge surrounds the resin sheet, which is then attached to the window or windshield.

Manually removing ice and snow from flexible plastic backlight panels using a scraper or the like is problematic due to the potential for the plastic to be scratched or damaged. Removing frost from a hack light panel with a gust of hot air requires a significant amount of time in cold weather to heat the air, usually resulting in uneven heat distribution across the back light panel. ing.

Although much of this prior art can be applied to automobiles, it was first developed in the aircraft industry. Therefore, laminate (
Laminates) are made of rigid plastic panels to better withstand the extreme temperature and pressure differences commonly encountered at extreme flight altitudes.

Rigid glass panels heated by multiple electrical components mounted inside the panel have been used in automobiles for many years, but this technology has been replaced by thin flexible plastic panels used in convertible tops. It was not improved for use. What is needed is an inexpensive rigid flexible composite plastic backlight panel that provides uniform heat distribution across the entire surface of the panel. Flexibility of the panel is important when the backlight panel is in a raised position, allowing the designer to achieve smooth contours and an aerodynamically efficient design. Although it has a curved configuration, it must lie flat in the deflated state for efficient storage.Problem to be Solved by the Invention This invention provides a novel heatable convertible top for a vehicle. Includes a light panel. Two electric wires are connected to a basoteli (storage battery). - a set of electrically conductive members in electrical connection with each tva to form a closed circular electrical circuit; An inner clear plastic laminate and an outer clear plastic laminate are sandwiched around one end of each wire and each electrically conductive member.

A carnate including electrical wires and electrically conductive members is secured to the convertible top, thereby forming a backlight panel. When the electrical circuit is energized, electrical energy is converted to thermal energy that is conducted to the outer laminate.

A) emissive plastic bank light for convertible tops has laterally extending electrically conductive members spaced a distance apart, mounted in an intermediate layer between two laminate sheets. This electrically conductive interlayer is useful for removing snow or ice from composite backlight panels. Additionally, heatable bank lights also eliminate some of the drawbacks of wrinkled or curved bank lights.

In order to fully understand the composite backlight panel of the present invention, presently preferred embodiments of the invention are shown below by way of example. The drawings, however, are for purposes of illustration and description only and are intended to demonstrate the limitations of the invention. Also, throughout the description and drawings, the same reference numbers refer to the same components throughout the respective figures.

<Means for Solving the Problems> A typical backlight panel of the present invention that solves the above-mentioned problems includes a first transparent plastic laminate (laminate plate) for fixing two electric wires; an intermediate N containing a plurality of electrical members in electrical connection with each of the two electrically connected wires; a second transparent plastinochramid; converted into thermal energy that is conducted to one of said laminates; a device for applying electrical energy from electrical wires to an electrical member; and a device for gluing two laminates together around an interlayer to form a composite backlight panel.
II is something to be feared. Other representative ones are 2
a first transparent plastic laminate for fixing the electrical wires; a plurality of electrical elements electrically connected to each of the two electrical wires electrically connected to the rt source on one side of the first plastic laminate; Device to do; 1st i! ! Electrical wires and electrical elements inserted between the transparent plastic laminate and a second transparent plastic laminate placed thereon; electrical energy from the electrical wires that is converted into thermal energy conducted to one of said laminates; and an apparatus for bonding two plastic laminates together to form a composite hack light panel.

<Function> Since the backlight panel of the present invention has the above configuration, by energizing the electric circuit, electrical energy is converted into thermal energy and conducted to the external veneer, thereby removing ice and snow from the panel. Removable Embodiment A three-layer capacitor-type structure forms a heatable backlight panel IO using an electric current that can be either direct current or alternating current. The two outer layers each consist of an inner flexible plastic laminate 22 and an outer flexible plastic laminate 24, sandwiched around an intermediate layer 28 containing a number of electrical elements that are electrically interconnected. . The two opposing wires 40, 42 are each electrically connected to a plurality of parallel, evenly spaced electrically conductive members 50. The conductive member 50 is Ultralight T.
22.24 used to heat laminates made of tlltralite™, a flexible vinyl chloride manufactured by Herber
t Lu5han) is commercially available from Plastinok Manufacturing Company.

One electric wire 40 is electrically connected to the anode of the electric wire A45,
The other wire 42 is electrically connected to the cathode.

Preferably, a motor vehicle accumulator serves as the electricity tA45.

The other end of each wire 44.46 is sandwiched between the opposite ends of the wires 22.24. The length of the wire is preferably about 550 mm. The combination of the power source 45, the two wires 40, 42 and the conductive member 50 forms a closed circular electrical circuit.

When this electrical circuit is energized, electrical energy flowing through conductive member 50 is converted to thermal energy that is conducted to outer laminate 24 . AC power requirements are 0.5 to 1.0 amps at frequencies of 60 to 500 hertz.
It is within the range of 00 to 180 ports.

DC power requirement is 5.0 to 8.0 at 13.0 volts
Ampere. The effective power is 96 watts (180,0 pols, 53 amps); the power dissipation is 15
．． Produces a surface temperature of 32.2°C to 48.8°C at an ambient temperature of 5°C. Based on the size control of the ink light, the resistance of the conductive member can be varied by changing the material placement and material composition.

Conductive member 50 extends essentially across the entire length of intermediate 11i28.

The conductive member 50 may be an electrical wire or a conductive tape, but is preferably a conductive ink due to the flexibility requirements for the panel 10. Although elongate conductive inks are preferred, graphite conductive inks can also be used. Conductive inks are commercially available from the MK-NIS (M to S) Company of Indianapolis, Indiana. [The conductive ink is applied onto the laminate 22 by using a silk sieve method.] Next, the laminate 24 is applied to the intermediate layer 2.
The laminates 22, 24 are arranged to form a backlight panel 10, which is heat treated by using suitable temperatures and pressures so that both laminates 22,24 become transparent.

The heated flexible backlight panel 10 is prepared by first cutting a 0.0508 cm thick laminate 22 from polyvinyl chloride sheet. A 7JO heated grid pattern is screen printed onto one side of the laminate 22. The inks used are electrically conductive and resistant to electrophoresis as specified for vehicle applications. The ink consists of vehicle flakes suspended in a thermoplastic composition.

Thin strips of copper material (not shown) are used in the intermediate layer 28 to provide uniform heat flow across the backlight panel 10. length is 0.9525
cm thick 0.0762C11 copper strips are then glued to the copper busbars on both sides of the checkerboard to complete the assembly (
This ensures uniform heating throughout the assembly. This copper strip is applied to the ink before heat treatment. The printed side of the zero-order laminate 22 is crimped to ensure proper electrical connection and provide strain relief during heat treatment by pleating the conductive member 50 to another polyvinyl chloride laminate 24 having similar dimensions. covered with.

These two laminates 122, 24 are then placed between two well-polished steel plates to form at least 8
Pressed together at a temperature of 2.2°C and a pressure of at least 200 psi (pounds per square inch) or 14.0614 kg/cd. First, Uξi, -t2224
is opaque. During compression, which takes about 2 minutes, Lamiho 1
-22.24 fuse together and become transparent. Preferably, the lead wires are routed back through copper busbars located on both sides.
Connected to the light panel 10 assembly.

The panel assembly 10 is then dielectrically bonded to the convertible cover or backlight carrier.

This adhesive material is a synthetic material that can remain flexible after dielectric bonding. This adhesive material has an inner layer of butyl rubber such as diamond particle vinyl or tassel. back·
Before securing the light panel 10 to the textile convertible roof, a black strip of 1.590 thick adhesive material is adhered around the perimeter of the panel IO and heat sealed. A dielectric bond is formed around the heat treated laminate 22,24.

While the invention has been described with specific embodiments, it will be apparent that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the disclosure herein.

It is intended that the present invention include all inventions, modifications, and changes that come within the spirit and scope of the claims.

<Effects of the Invention> The present invention is a novel heatable backlight panel for a convertible top of a vehicle, in which electrical energy is converted into thermal energy when the electrical circuit is energized, and the external laminate is heated. can be conducted to remove snow or ice from the panels.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a heatable composite backlight panel for a convertible vehicle, and FIG. 2 is a heatable composite backlight panel showing the laminate, electrical wires, and conductive members.
An assembly diagram of the light panel is shown. 10 is a back light panel, 22 is a plastic laminate (inside), 24 is a plastic laminate (outside), 28 is an intermediate layer, 40, 42, 44, 45, 46 is an electric wire, and 50 is a T4 conductive member.

Claims (8)

[Claims] (1) A first transparent plastic laminate that fixes the two electric wires; an intermediate layer containing a plurality of electrical members electrically connected to each of the two electric wires that are electrically connected to a power source; a transparent plastic laminate; a device for applying electrical energy from electrical wires to the electrical member which is converted into thermal energy conducted to one of said laminates; and two laminates around the intermediate layer to form a composite backlight panel. Heatable backlight panel for a convertible top of a vehicle, characterized in that it includes a device for gluing together. 2. The panel of claim 1, wherein each plastic laminate is comprised of polyvinyl chloride material. 3. The panel of claim 1, wherein the bonding device includes increasing the temperature and pressure of the plastic laminate and interlayer to form a dielectric bond around the perimeter of the panel. 4. The panel of claim 3, wherein the diamond particulate material is adhesively heat sealed around the composite panel. (5) A first transparent plastic laminate for fixing the two electric wires; a plurality of electrical members electrically connected to each of the two electric wires electrically connected to a power source are screened onto one side of the first plastic laminate; an electrical wire and an electrical element inserted between a first transparent plastic laminate and a second transparent plastic laminate disposed thereon; an electrical wire that transmits electrical energy that is converted into thermal energy conducted to one of said laminates; and a device for gluing two plastic laminates together to form a composite backlight panel. back light panel. 6. The panel of claim 5, wherein each plastic laminate is comprised of polyvinyl chloride material. (7) the bonding device includes increasing the temperature and pressure of the plastic laminate and interlayer to bond it to the panel;
The panel according to claim (5). 8. The panel of claim 7, wherein the diamond particle material is dielectrically bonded and heat sealed around the composite panel.