KR20010077355A - Forder type plat display device - Google Patents

Abstract

PURPOSE: A fold-type plat display device is provided to decrease the consumption power and remove a soldering process to simplify the fabrication process by connecting two electro luminescence devices with a heat seal and simultaneously composing a backlight in two displays. CONSTITUTION: A heat seal(50) is connected between two electro luminescence devices(30,40) used as a backlight of the first display and the second display. A driving terminal(60) is formed at one side of the electro luminescence devices(30,40). The heat seal(50) is formed by a screen print of a conductive coating material for spreading a metal particle using a polyester as a base film, and an insulated hot melt adhesive agent is covered between a wire of the heat seal(50). Since a flexion is excellent and a conductive pattern is formed in the heat seal(50), two electro luminescence devices(30,40) are easily connected.

Description

Foldable plat display device

The present invention relates to a foldable flat panel display device, and more particularly, by connecting an electroluminescent device with a heat seal in a portable phone that allows folding and folding information in a folding manner, thereby enabling display on both sides. The present invention relates to a folding flat panel display.

Flat panel display devices known to date include liquid crystal display (LCD), thin film transistor (TFT) -LCD, field emission display (FED), plasma display panel (PDP) and electro luminescent (EL) display. With the planarization, CRTs are being replaced, and since battery power can be adopted, they are widely used in portable phones, notebook computers, PDAs, etc.

In particular, with the rapid development of wireless communication, a large number of personal mobile phones have been spread, and mobile phones capable of realizing a small and light screen are being developed. Conventionally, a folding type (folding) telephone has been popularized for the purpose of reducing the size of a portable telephone. The folding type telephone has a display on one side and a function input unit on the other side. One structure to help.

The folding telephone has a small size, but in the folded state, even a simple information content cannot be confirmed. In other words, in order to check even simple information such as date and time, it is necessary to expand the folder and uncomfortable to drive the display by unfolding the folder even for contents that do not require a call such as a text message.

In order to make up for this inconvenience, a portable phone has been developed that manufactures a mobile phone in a fold and has a display on the exterior of the phone so that the schedule information can be checked even after folding a folder.

One embodiment of the foldable flat panel display device having the above-described configuration is shown in FIG. 4 by dividing it into an expanded state and a folded state.

4A and 4B illustrate a portable phone, which is formed through a joint 12 so that the cover 1 and the main body 2 can be folded, and the cover 1 has a first display 100 on both sides. ) And the second display 200 are formed.

The first display 100 can display the main functions of the portable telephone and is driven only when the cover 1 and the main body 2 are unfolded. The user opens the lid to drive the first display mainly in the main functions of the portable telephone, such as calls, internet communications, information retrieval, and the like.

In normal times, since the cover is carried around, the first display 100 cannot be checked before being unfolded so that the date, time, and simple received messages can be driven on the second display 200 at all times.

5 is a cross-sectional view of the display unit of the portable telephone as shown in FIG.

The display will be described by applying a liquid crystal display (LCD) as an example.

This figure shows a cross section of a lid portion of a portable telephone having a first display and a second display configured on the inner and outer surfaces of the lid portion. As shown in the drawing, two backlights 3 and 4 are attached to the upper and lower surfaces with the central PCB 20 interposed therebetween, and the backlight 3 on the upper surface includes two sheets constituting the first display 100. The liquid crystal display device 110 in which the polarizing plates 112 and 118 and the two substrates 114 and 116 are stacked is mounted. Also, a liquid crystal display device 210 constituting the second display 200 is attached to the lower backlight 4. The liquid crystal display devices 100 and 200 are respectively received by the backlights 3 and 4 disposed on the bottom thereof to easily display information even at night. In the above-described structure, the liquid crystal display device 110 may be used. Two backlights 3 and 4 are required in accordance with the number of 210.

As the backlight of the liquid crystal display devices 110 and 210, an LED (Light Emitting Diode) or an EL (Electro Luminescence) is commonly used.

The electroluminescent device is a display device using a material that emits fluorescence when a voltage such as zinc sulfide is applied, and is used as a backlight of a liquid crystal display device in the form of a thin film having a thickness of 2 μm having a light emitting layer made of zinc sulfide between insulating layers.

However, in the conventional folding portable telephone, the terminal is manufactured by driving an electroluminescent element as a backlight used for the first display and LEDs as the backlight used for the second display or driving two electroluminescent elements respectively. The problem is that the manufacturing process is increased, the manufacturing process is complicated, and the power consumption by the battery is increased.

The present invention has been made to solve the above-mentioned problems of the prior art, by connecting two electroluminescent elements used as a backlight in a flexible chamber to a foldable flat panel display device that can be applied to both displays with the power required for a single backlight The purpose is to provide.

A foldable flat panel display device using an electroluminescent element as a backlight of a display and including a first display and a second display formed on both sides of a cover, wherein one side of the first electroluminescent element and the second electroluminescent element are connected to each other. The chamber is bent to form a configuration in which the backlight is simultaneously attached to the first display and the second display.

The foldable flat panel display having the above-described configuration can be bent by connecting an electroluminescent element used as a backlight to a chamber and can be attached to two displays simultaneously with a backlight to simplify the process and lower power consumption.

1 is a view schematically showing an electroluminescent element used as a backlight of a foldable flat panel display according to the present invention.

Figure 2 is a side view showing the structure of an electroluminescent device applied to the present invention.

Figure 3 is a side cross-sectional view showing the structure of the display unit in the folding flat panel display according to the present invention.

4A and 4B are perspective views illustrating a portable telephone as an example of a general folding flat panel display.

5 is a cross-sectional view illustrating a display unit of a conventional foldable flat panel display device.

Brief description of the main parts of the drawing

1: cover 2: main body

20: PCB 30, 40: electroluminescent device

50: heat seal 60: terminal

100: first display 110: first liquid crystal display element

200: second display 210: second liquid crystal display device

EMBODIMENT OF THE INVENTION The structure of this invention is demonstrated in detail based on attached drawing. For reference, prior to the description of the present invention will be referred to the same reference numerals as for the parts corresponding to the conventional drawings.

FIG. 1 schematically shows an unfolded state of an electroluminescent element used as a backlight in a foldable flat panel display according to the present invention.

In the drawings, the electroluminescent device is formed by connecting the two electroluminescent devices 30 and 40 used as backlights of the first display 100 and the second display 200 with a chamber 50. 30, 40, the driving terminal 60 is formed on one side.

The heat seal 50 is formed of a conductive film in which metal particles are dispersed by screen printing using a polyester as a base film, and an insulating hot melt is formed between the wirings. Hot melt adhesive is applied. The junction is simply connected by thermal compression as a crimping tool after aligning with a counter electrode (ITO electrode or PCB electrode). Since the substrate material is a polymer film (polyester), the yarn is a connection method that is excellent in flexibility and thinner and lighter. It is also required to have a high reliability or a crimping tool, and in general, a conductive pattern is formed by printing, so that a connection pitch of 0.25 mm is minimized.

As described above, since the flexibility and the conductive pattern are formed, the two electroluminescent devices 30 and 40 can be easily connected.

The structure of the electroluminescent device 30 is schematically shown in FIG.

In the figure, the light emitting layer 33 is formed on the ITO PET 31 on which the transparent electrode is formed. The light emitting layer 33 is composed of zinc sulfide or manganese, and zinc sulfide or manganese is used as a main material of an electroluminescent device because it has a property of emitting fluorescence by itself when a voltage is applied.

The insulating layer 35 is formed on the light emitting layer 33, and the insulating layer 35 is for securing insulation between the transparent electrode 31 and the back electrode 37 to be described later by applying an insulating dielectric. . The back electrode substrate 37 is disposed on the insulating layer 35, and an aluminum electrode substrate is mainly disposed. The protective film 39 is coated on the back electrode substrate 37 to form the electroluminescent device 30.

FIG. 3 is a schematic cross-sectional side view of a display unit employing the electroluminescent element and using a liquid crystal display element as a flat panel display.

As shown in the figure, the above-described electroluminescent elements 30 and 40 are attached to both sides with the PCB 20 in the middle and the electroluminescent elements 30 and 40 are connected to the chamber 50. The current can be conducted. As shown in the drawing, the upper portion of the first electroluminescent device 30 positioned above the PCB 20 is stacked in the order of the lower polarizing plate 112, the lower substrate 114, the upper substrate 116, and the upper polarizing plate 118. The first liquid crystal display device 110 is attached and the first electroluminescent device 30 serves as a backlight of the first liquid crystal display device 110.

On the bottom of the second electroluminescent device 40 attached below the PCB 20, a second liquid crystal display device composed of two polarizing plates 212,218 and two substrates 214,216, 210 is mounted.

The liquid crystal display device has a regular molecular arrangement such as crystals of a solid with the liquidity of liquid, and has an optical anisotropy and uses the property of a liquid crystal having the characteristic that the molecular arrangement changes along the direction of an electric field when a voltage is applied. A device that displays characters, or pictures.

Briefly describing the structure of the liquid crystal display device used in the present invention, although omitted in the drawings, the substrate is positioned on the upper and lower sides with a central liquid crystal cell interposed therebetween, and a transparent electrode is patterned on each substrate opposing surface, and an insulating layer and an alignment layer Is formed. The polarizing plate is attached to the substrate and is attached to the substrate.

The present invention of the above-described configuration is connected to the electroluminescent element serving as a backlight of the liquid crystal display element used in each display unit in a flexible chamber to obtain the effect of a single configuration, compared to using two electroluminescent elements Can be lowered.

A foldable flat panel display that uses an electroluminescent element as a backlight for a display and forms two displays on both sides of the cover, wherein the electroluminescent element is connected to a conductive and flexible chamber to simultaneously backlight the two displays. Lowering power and eliminating the soldering process has the effect of simplifying the manufacturing process.

Claims (2)

A foldable flat panel display including a main body having a function input unit, a cover having first and second displays formed on both sides thereof, and first and second electroluminescent elements separately attached to the first and second displays and driven separately. To A foldable flat plate comprising a flexible conductive material connecting the first electroluminescent element and the second electroluminescent element, and capable of simultaneously driving the first and second electroluminescent elements by a single terminal by the conductive material. Display. The foldable flat panel display of claim 1, wherein the conductive material is a heat seal conductive material.