KR20070040268A - Dual-type electro luminesence display apparatus and method for manufacturing thereof, communication terminal equipped thereof - Google Patents

Abstract

The present invention includes a first display unit including a plurality of electroluminescent elements formed on a first transparent substrate and a first light emitting unit, and a second display unit including a plurality of electroluminescent elements formed on a second transparent substrate and a second light emitting unit. The edge portion of either or both of the first transparent substrate and the second transparent substrate is provided to be bent. Accordingly, not only can the curved surface of the upper case of the mobile communication terminal with a double-sided light emitting display device be provided, but also the appearance of an elegant case image of the mobile communication terminal can be provided to improve the productivity of the mobile communication terminal. It can be effective.

Double-sided light emitting display device, first display unit, second display unit

Description

Dual-sided electroluminescent display device and method for manufacturing same, and mobile communication terminal embedded therein {Dual-type Electro Luminesence Display apparatus and method for manufacturing et

1 is a cross-sectional view of a conventional double-sided organic light emitting display device.

FIG. 2 is a top cross-sectional view illustrating a state in which the double-sided light emitting organic electroluminescent display shown in FIG. 1 is fastened to an upper case of a portable mobile communication terminal.

3 is a perspective view illustrating the external appearance of the mobile communication terminal illustrated in FIG. 2.

4 is a flowchart in which a double-sided light emitting electroluminescent display according to an embodiment of the present invention is formed.

5 is a cross-sectional view of a double-sided light emitting display device according to an embodiment of the present invention.

6 is a top cross-sectional view illustrating a state in which the double-sided light emitting electroluminescent display shown in FIG. 5 is fastened to an upper case of a mobile communication terminal.

FIG. 7 is a perspective view illustrating an external appearance of the mobile communication terminal illustrated in FIG. 6.

* Description of the main parts of the drawings *

500: double-sided light emitting display device 510: first display unit

512: first transparent substrate 514: first light emitting portion

516: First drive unit 520: Second display unit

522: second transparent substrate 524: second light emitting portion

526: second drive unit 530: sealing material

610: upper case of the mobile communication terminal

700: external case of the mobile communication terminal

P1, P2, P3, P4: Edge

The present invention relates to a double-sided light emitting display device, a method of manufacturing the same, and a mobile communication terminal embedded therein.

Recently, various flat panel displays have been developed to reduce weight and volume, which are disadvantages of cathode ray tubes. Such flat panel displays include liquid crystal displays (hereinafter referred to as "LCDs"), field emission displays (FEDs) plasma display panels (hereinafter referred to as "PDPs") and electrophoresis. There is a luminescence (EL) display device. In order to improve the display quality of such a flat panel display device and to attempt to make a large screen, researches are being actively conducted.

Among flat panel displays, PDP is attracting attention as the most advantageous display device because of its simple structure and manufacturing process, but it is light and simple, but has a high luminous efficiency, low luminance, and high power consumption. On the other hand, active matrix LCDs with thin film transistors ("TFTs") as switching elements are difficult to screen due to the use of semiconductor processes, but demand is increasing as they are mainly used as display elements in notebook computers. have. However, LCDs are difficult to make large areas and consume large power consumption due to the backlight unit. In addition, the LCD has a large optical loss and a narrow viewing angle due to optical elements such as a polarizing filter, a prism sheet, and a diffusion plate.

In contrast, EL display devices are classified into inorganic EL devices and organic EL devices according to the material of the light emitting layer, and are self-luminous devices that emit light by themselves and have a high response speed and high luminous efficiency, luminance, and viewing angle. There is this. Such an organic light emitting diode (OLED), which is an EL element using organic materials among the EL display elements, has a low DC driving voltage, thin film thickness, uniformity of emitted light, easy pattern formation, and light emission comparable to other light emitting devices. It has the advantages of efficiency, all color light emission in the visible region, and is a technical field that is very actively researched for application to display elements.

The organic EL device has a bottom emission method and a top emission method according to a direction in which light is emitted. In addition, the organic EL device is classified into a passive matrix organic emitting diode (PMOELD) and an active matrix organic emitting diode (AMOELD) according to a driving method.

Recently, by applying the bottom-emission organic electroluminescent device of the above-described organic electroluminescent device, another substrate formed to face each other opposite to one substrate including the organic electroluminescent device is provided. Research of double-sided light emitting organic electroluminescent display devices serving as protective caps has been continuously made. The conventional double-sided emission type organic light emitting display device will be described with reference to FIG. 1.

1 is a cross-sectional view of a conventional double-sided organic light emitting display device.

As illustrated in FIG. 1, the conventional double-sided emission type organic light emitting display device 100 is largely provided as a first display unit 110 and a second display unit 120. In this case, the first display unit 110 includes a first transparent substrate 112 constituting a screen, a first light emitting unit 114 and a first driver 116 formed on the first transparent substrate 112. . In addition, the second display unit 120 includes a second transparent substrate 122 constituting a screen, a second light emitting unit 124 and a second driving unit 126 formed on the second transparent substrate 122. .

After the first light emitting unit 114 and the second light emitting unit 124 provided in each of the first display unit 110 and the second display unit 120 face each other, the encapsulant is sealed. When the first transparent substrate 112 and the second transparent substrate 122 are bonded to each other by using the first and second 130, the double-sided light emitting organic electroluminescent display 100 is completed.

As described above, the conventional double-sided organic light emitting display device 100 includes two pieces of first transparent substrate 112 and second transparent substrate 122 on each of the first display unit 110 and the second display unit 120. Since only the substrate was used, the overall thickness was thinner and lighter than the conventional double-sided light emitting LCD, which had to use a total of four substrates, two for each of the main LCD and the sub LCD. This reduction in weight and thickness, for example, is a very important differentiator for products such as portable mobile terminals, which not only reduced the thickness of the terminal but also contributed to lowering the panel price.

However, as shown in FIG. 2, the conventional double-sided light emitting organic light emitting display device 100 includes a first transparent substrate 112 provided in each of the first display unit 110 and the second display unit 120. Since the edges of both side ends of the light emitted from the second transparent substrate 122 are bent and formed, an image of which the appearance of the upper case 210 of the mobile communication terminal to be completed after fastening with the upper case 210 of the mobile communication terminal is desired. There is a limit to the production, as shown in Figure 3 provides a visually monotonous external case image of the mobile communication terminal to the new generation wants individuality as shown in Fig. 3, the lower the preference, the lower the productivity of the mobile terminal do.

In order to solve the above problems, the present invention provides a mobile communication terminal having a built-in double-sided light emitting display device by bending the edge portion of the transparent substrate provided in the external display unit of the double-sided light emitting display device. It is an object of the present invention to provide a double-sided light emitting display device that can easily bend the surface of the upper case and improve the productivity of the mobile communication terminal by providing an external case image of a stylish mobile communication terminal.

The present invention for solving the above problems is a first display unit including a plurality of electroluminescent elements formed on the first transparent substrate and the first light emitting portion, and a plurality of electroluminescent elements and second light emitting formed on the second transparent substrate It has a second display unit including a portion, characterized in that the edge portion of any one or both of the first transparent substrate or the second transparent substrate is formed to be bent.

In addition, the size of the first light emitting part and the size of the second light emitting part may be the same or different from each other.

In addition, the first light emitting unit and the second light emitting unit is characterized in that it comprises an anode electrode, a cathode electrode, the light emitting layer.

In addition, the light emitting layer is characterized in that the organic light emitting layer.

In addition, the mobile communication terminal is a built-in double-sided light emitting display device.

In the method for manufacturing a double-sided light emitting electroluminescent display of the present invention, (a) on a first display portion and a second transparent substrate comprising a plurality of electroluminescent elements and a first light emitting portion formed on the first transparent substrate Preparing a second display unit including a plurality of electroluminescent elements and a second light emitting unit; (b) bonding the first display unit and the second display unit together; and (c) the first transparent substrate or the second transparent substrate. Bending the edges of either or both of them.

In addition, the size of the first light emitting part and the size of the second light emitting part may be the same or different from each other.

In addition, the first light emitting part and the second light emitting part are characterized by comprising an anode electrode, a cathode electrode, and a light emitting layer.

In addition, the light emitting layer is characterized in that the organic light emitting layer.

In addition, the step of forming the curved portion of the substrate of any one of the first transparent substrate or the second transparent substrate is formed by using any one of the etching (Etching) method or the pressing method (Press) method. do.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail.

4 is a flowchart in which a double-sided light emitting electroluminescent display according to an exemplary embodiment of the present invention is formed. First, the double-sided organic light emitting display device of the present invention is a dual display, and the first transparent substrate formed on the first display unit and the second transparent substrate formed on the second display unit are bonded to each other. The edge portion of any one of the first transparent substrate and the second transparent substrate is formed to be bent. The process of forming the double-sided light emitting electroluminescent display according to the present invention will be described with reference to FIG. 4.

As shown in FIG. 4, the process of forming the double-sided light emitting display device according to the present invention may first include a first transparent substrate, a second transparent substrate, a first transparent substrate, and a first transparent substrate on which a plurality of electroluminescent elements are formed, respectively. A first display unit and a second display unit including a first light emitting unit and a second light emitting unit respectively formed on the transparent substrate are prepared (S401).

Thereafter, the first display unit and the second display unit are bonded to each other for light emission on both sides (S402), and the edges of any one of the above-described first transparent substrate or the second transparent substrate are bent. (S403).

Herein, the formation of the double-sided light emitting display device according to the present invention will be described in more detail with reference to FIG. 5.

5 is a cross-sectional view illustrating a double-sided light emitting display device according to an embodiment of the present invention. First, the double-sided light emitting display device according to the present invention is provided in the same manner as the double-sided light emitting display device shown in FIG. However, the double-sided light emitting display device according to the present invention is formed by bending an edge portion of one of the first transparent substrate and the second transparent substrate formed on each of the first display unit or the second display unit. do. The double-sided light emitting display device according to the present invention will be described with reference to FIG. 5.

As illustrated in FIG. 5, the double-sided light emitting display device 500 according to the present invention includes a first display unit 510 and a second display unit 520. In this case, the first display unit 510 includes a first transparent substrate 512 having a plurality of electroluminescent elements constituting a screen and a first formed in the light emitting region of the light emitting region and the non-light emitting region on the first transparent substrate 512. The light emitting unit 514 and the first driving unit 516 formed in the non-light emitting area are included. In addition, the second display unit 520 may include a second transparent substrate 522 having a plurality of electroluminescent elements constituting a screen, and a second formed in the light emitting region of the light emitting region and the non-light emitting region on the second transparent substrate 522. The light emitting unit 524 and the second driving unit 526 formed in the non-light emitting area are included.

The first light emitting unit 514 and the second light emitting unit 524 provided in each of the first display unit 510 and the second display unit 520 are disposed to face each other, and then, an encapsulant. When the first transparent substrate 512 and the second transparent substrate 522 are bonded to each other by using the 530, the double-sided light emitting display device 500 is completed.

Here, in the present invention, a surface is formed on one side of the light emitted from the second transparent substrate 522 so that the second transparent substrate 522 corresponds to the second light emitting part 524 formed in the light emitting region. The edges P1 and P2 are curved and formed in the direction. However, the present invention is not limited thereto, and either the first light emitting unit 514 or the second one of the first transparent substrate 512 or the second transparent substrate 522 is formed in the light emitting region. A predetermined surface is formed on one or both sides of the light emitting unit 524 so as to correspond to any one of the light emitting units 514 and 524 so that one or more edge portions P ₁ and P ₂ are bent toward the non-light emitting region. It may be formed. This is to consider the aesthetics of the upper case of the mobile communication terminal which determines the appearance when the double-sided light emitting display device and the upper case of the mobile communication terminal which will be described later are fastened.

In this case, an etching method is performed in order to bend the edge portions P ₁ and P ₂ of any one of the above-described first transparent substrate 512 or second transparent substrate 522. Or one of the compression press (Press) method is used.

Meanwhile, the first display unit 510 including the first transparent substrate 512 on which the first light emitting unit 514 is formed is an internal display unit, and the second transparent substrate on which the second light emitting unit 524 is formed. The second display unit 520 including 522 is an external display unit, and the size of the first light emitting unit 514 included in the first display unit 510 is provided in the second display unit 520. It is formed larger than or equal to the size of the second light emitting part 524.

In addition, although the first light emitting part 514 and the second light emitting part 524 are not shown for light emission, an anode electrode (not shown), a cathode electrode (not shown), and a light emitting layer (not shown) are provided. do. In this case, the light emitting layer described above is an organic light emitting layer which is a self-emission organic material that emits light when current flows through the organic compound. However, the present invention is not limited thereto, and the light emitting layer may be an inorganic light emitting layer which is a self-emitting inorganic material.

Herein, a state in which the double-sided organic light emitting display device according to the present invention and the upper case of the mobile communication terminal determining the external appearance are fastened will be described with reference to FIG. 6.

6 is a top cross-sectional view illustrating a state in which the double-sided light emitting organic electroluminescent display shown in FIG. 5 is fastened to an upper case of a portable mobile communication terminal.

As shown in FIG. 6, the double-sided organic light emitting display device according to the present invention has a first transparent substrate 512, a first light emitting part 514, and a second transparent substrate as in FIG. 5. 522, the second light emitting part 524, the encapsulant 530, and the like. Here, when the upper case 610 of the mobile communication terminal is fastened, the edge portions P3 and P4 of the upper case 610 of the mobile communication terminal along the edge portions P1 and P2 of the second transparent substrate 522. Since it is possible to form a corresponding), not only can be easily curved surface processing of the upper case 610 of the mobile communication terminal, but also provides a visually stylish image of the external case 700 of the mobile communication terminal as shown in FIG. Since the preference is higher than that of the external case 300 of the mobile communication terminal illustrated in FIG. 3, the productivity of the mobile communication terminal can be improved.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the present invention not only facilitates the curved surface processing of the upper case of the mobile communication terminal in which the double-sided light emitting display device is incorporated, but also provides an external case image of the stylish mobile communication terminal. This has the effect of improving the productivity.

Claims (10)

A first display unit including a plurality of electroluminescent elements and a first light emitting unit formed on the first transparent substrate; A second display unit including a plurality of electroluminescent elements and a second light emitting unit formed on the second transparent substrate, And an edge portion of any one or both of the first transparent substrate and the second transparent substrate is formed to be bent. The method of claim 1, The size of the first light emitting part and the size of the second light emitting part is the same or different from each other. The method of claim 2, And the first light emitting part and the second light emitting part comprise an anode electrode, a cathode electrode, and a light emitting layer. The method of claim 3, wherein And the light emitting layer is an organic light emitting layer. A mobile communication terminal having a built-in double-sided light emitting display device according to any one of claims 1 to 4. In the method for manufacturing a double-sided light emitting display device, (a) a first display unit including a plurality of electroluminescent elements formed on a first transparent substrate and a first light emitting unit, and a second display unit including a plurality of electroluminescent elements formed on a second transparent substrate and a second light emitting unit; Preparing; (b) bonding the first display unit and the second display unit together; and (c) bending the edges of one or both of the first transparent substrate and the second transparent substrate to bend. The method of claim 6, And a size of the first light emitting part and a size of the second light emitting part are the same as or different from each other. The method of claim 7, wherein And the first light emitting part and the second light emitting part comprise an anode electrode, a cathode electrode, and a light emitting layer. The method of claim 8, The light emitting layer is a method of manufacturing a double-sided light emitting display device, characterized in that the organic light emitting layer. The method of claim 6, Forming by bending the edge portion of any one of the first transparent substrate or the second transparent substrate is formed by using any one of the etching (Etching) method or the pressing method (Press) method A method of manufacturing a double-sided light emitting display device.

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