JPH01198787A - El display device - Google Patents

Abstract

PURPOSE:To use the EL display device in a transparent state as a window normally and to emit light in emergency and to display necessary information by providing a display part consisting of a thin film EL element to a glass window and applying a voltage to the display part. CONSTITUTION:A couple of electrodes 2 and 6 made of transparent conductive films are provided on a glass substrate 1, and double insulating layers 3 and 5 and a light emitting layer 4 of ZnS containing a trace amount of Mn are laminated between the electrodes 2. When the AC voltage is applied between both electrodes 2 and 6, the light emission layer 4 develops yellowish orange color. The electrodes 2 and 6 form a number, a character, a figure, or a matrix- shaped pattern and displays various pieces of information. Consequently, various displays are made with simple constitution. Further, the device is normally transparent, so it functions as a glass window in a room or passage and displays necessary information in emergency.

Description

DETAILED DESCRIPTION OF THE INVENTION Purpose of the invention (industrial field of application) The present invention provides a thin film EL element provided on a glass substrate that
This invention relates to a window that displays various information by emitting light when necessary.

(Prior Art and Problems to Be Solved) Conventionally, emergency exits and the like in hotels and the like have been indicated by emergency lights using fluorescent lights.

In addition to emergency exits, these are placed discretely at key points in passageways, but increasing the number for safety reasons not only costs money, but also impairs aesthetics.

Additionally, these emergency lights could only display one type of display (for example, "emergency exit") that was pre-marked.

An object of the present invention is to provide a display window in an emergency light that is normally used as a window in a transparent state and is illuminated in an emergency to display necessary information.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a display window is constructed by providing a light emitting layer sandwiched between a transparent electrode and an insulating film on a glass substrate.

(Function) By configuring the electrodes of the element with a transparent conductive film and the insulating film with a transparent film, it becomes transparent or transparent when no voltage is applied.
It is mostly transparent and can be illuminated to display information when needed.

(Example) Hereinafter, it will be explained according to the drawings. FIG. 1 shows an example of the configuration of an EL element used in the present invention.

There are various types of EL elements, but in this example, as shown in the figure, a pair of electrodes 2.6 made of a transparent conductive film (for example, ITO) are provided on a glass substrate 1, and a double insulating layer ( For example, a light emitting layer 4 of ZnS containing TazO, )3.5 and a trace amount of Mn is laminated.

When an alternating current voltage is applied between the picture electrodes 2 and 6, the light emitting layer 4 exhibits a yellow-orange color.

The electrodes 2.6 are formed with numbers, letters, figures, or patterns in the form of a matrix to display various information.

In this embodiment, the EL element was formed on a glass substrate, but the EL element may also be formed on a thin film such as thermoplastic and attached to a window glass or the like. FIG. 2 shows an example of the display state.

(Effects of the Invention) According to the present invention, this EL display device has a simple configuration and can perform various displays. Also, since they are usually transparent, they function as glass windows in rooms or passageways, and have the effect of displaying necessary information in emergencies.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the Fil@EL element of the present invention, and FIG. 2 is an example of a display state. 1...Glass group Fi, 2.6...ti3.5...
Insulating film 4...Emissive layer patent applicant Komatsu Ltd. Representative (patent attorney) Oka 1) Kazuyoshi

Claims (2)

[Claims] (1) A display section consisting of a thin film EL element is provided on the glass window,
E emits light by applying voltage to the display section.
L display device. (2) The EL display device according to claim 1, wherein the thin film EL element has a double insulating layer and a light emitting layer laminated between a pair of electrodes.