KR100796154B1 - Portable Display Device - Google Patents

Abstract

A portable display device according to an embodiment of the present invention includes a first display panel mounted with an integrated circuit for supplying a data signal and a scan signal to display an image; A portable display device comprising a tape which prevents the integrated circuit from being exposed to UV light and is attached to obtain a grounding effect of ESD and EMI, wherein the tape is insulated from a conductive base made of a conductive material having light blocking performance. It is an integral tape composed of a non-conductive insulating adhesive made of a material.

According to the present invention, the conductive tape and the shading tape on the integrated circuit mounted on the display panel of the portable display device are integrated to reduce the thickness to half, thereby making the portable display device slimmer and reducing the cost and simplifying the structure. Therefore, there is an effect that can enhance the product competitiveness.

Conductive Tape, Shading Tape, Display, LCD

Description

Portable Display Device

1 is a cross-sectional view showing a conductive tape and a light shielding tape attached to an integrated circuit of a conventional portable display device;

2 is an exploded perspective view illustrating a portable display device according to an exemplary embodiment of the present invention;

3 is a cross-sectional view of an integrated tape according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

4: first display panel

4a, 4b: substrate 6, 34: integrated circuit

8: protective layer 10,20: optical sheet

12 light emitting diode 14 light emitting diode substrate

16: mold frame 18: light guide plate

20: reflector 22: bottom chassis

24, 26, 32: printed circuit board 28: connector

30: second display panel 36, 38: pad portion

50: backlight assembly 60: portable display device

70: integral tape 71: conductive tape

72: insulation adhesive

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable display device. In particular, a conductive display and a light shielding tape attached to an integrated circuit mounted on a display panel of a portable display device are integrated to reduce the thickness to half, thereby making the portable display device slimmer. The present invention relates to a portable display device that can enhance product competitiveness due to cost reduction and simplified structure.

Recently, various flat panel displays have been developed to reduce weight and volume, which are disadvantages of cathode ray tubes. The flat panel display includes a liquid crystal display, a field emission display, a plasma display panel, and an organic light emitting display.

Here, the liquid crystal display and the light emitting display have been attracting attention as an alternative means to overcome the disadvantages of the conventional cathode ray tube because of the advantages of miniaturization, light weight and low power, and now mobile phones and PDA (Portable digital assistor) In addition to the portable devices such as, such as monitors and TVs, which are medium and large-sized products, in particular, most of the portable devices such as mobile phones or PDAs are currently employing almost all portable display devices such as liquid crystal displays or light emitting displays. to be.

However, in such a conventional portable display device, in accordance with the trend toward miniaturization and slimming of portable devices, the overall slimness of the portable display device has been reduced by reducing the overall thickness of the display device and eliminating unnecessary protection elements. .

In particular, a plurality of tapes are inserted into a conventional portable display device for coupling various components and blocking UV rays. Such a tape not only increases the manufacturing cost but also prevents the slimming of the portable display device as mentioned above. To be an element.

1 is a cross-sectional view illustrating a conductive tape and a light shielding tape attached to an integrated circuit of a conventional portable display device. In the related art, a light shielding tape 103 is provided to block exposure of an integrated circuit of a display panel to UV light. And, using the conductive tape 100 was attached separately to obtain the grounding effect of ESD and EMI.

The conventional conductive tape 100 is composed of a conductive base 101 and a conductive adhesive 102, the light-shielding tape 103 was prepared by coating a light-shielding agent on a light-shielding general insulating tape.

In general, in order to prevent malfunction of an integrated circuit (LSI), the light shielding tape 103 is attached using an insulating adhesive 104, and a conductive tape 100 is attached thereon to improve ESD (regular discharge) characteristics. .

However, such a portable display device having a plurality of tapes attached thereto may not only hinder the slimming, but also increase the cost and weaken the rigidity of the portable display device, causing frequent failures and breakages.

Accordingly, there is a need to find a structural solution that can reduce cost and stiffness while realizing slimming of a portable display device by removing a plurality of tapes included in the portable display device.

Accordingly, the present invention has been made to solve the above problems, by integrating the conductive tape and the shading tape on the integrated circuit mounted on the display panel of the portable display device to reduce the thickness to half level, slimming the portable display device The purpose of the present invention is to provide a portable display device that can enhance the product competitiveness due to cost reduction and simplified structure.

In order to achieve the above object, the present invention provides a display device comprising: a first display panel mounted with an integrated circuit for supplying a data signal and a scan signal to display an image; A portable display device comprising a tape which prevents the integrated circuit from being exposed to UV light and is attached to obtain a grounding effect of ESD and EMI, wherein the tape is insulated from a conductive base made of a conductive material having light blocking performance. A portable display device is provided, which is an integral tape composed of a nonconductive insulating adhesive made of a material.

Here, the conductive material of the conductive substrate is characterized in that any one selected from nickel, copper, gold, silver, the non-conductive insulating adhesive is characterized in that any one selected from PET, PE-based resin.

The display device may further include a backlight assembly configured to irradiate light under the first display panel, wherein the backlight assembly may include light emitting diodes as a light source, a light emitting diode substrate on which the light emitting diodes are mounted, and the light emitting diode substrate is fixed to the light emitting diode substrate. And a light guide plate, a reflector plate, and an optical sheet.

On the other hand, the first display panel may be implemented as a liquid crystal display panel, the first display panel, the first substrate; A second substrate having a plurality of thin film transistors formed in a display area bonded to the first substrate and an integrated circuit formed in a non-display area not bonded to the first substrate; Characterized in that it comprises a liquid crystal injected between the first substrate and the second substrate.

The portable display device may further include: a second printed circuit board connected to an external driving circuit; A first printed circuit board mounted with a pad part connected to the second printed circuit board and controlling a light source included in the first display panel and the backlight assembly; A second display panel is further provided below the second printed circuit board to display an image by being connected to the second printed circuit board.

The second display panel may be implemented as an organic electroluminescent display panel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is an exploded perspective view illustrating a portable display device according to an exemplary embodiment of the present invention.

However, this will be described as an example of a dual type display device used in a mobile phone, but this is one embodiment and the present invention is not necessarily limited thereto.

Referring to FIG. 1, a portable display device 60 according to an exemplary embodiment of the present invention includes a first display panel 4, a backlight assembly 50, a bottom chassis 22, and a first printed circuit board. 24, the second printed circuit board 26 and the second display panel 30 are included.

Here, the first display panel 4 displays a predetermined image. In the embodiment of the present invention, the first display panel is configured of a liquid crystal display panel.

The first display panel 4 includes a first substrate 4a, a second substrate 4b, and a liquid crystal (not shown) injected therebetween, and the second substrate 4b has a matrix form. And a plurality of thin film transistors (hereinafter referred to as "TFTs").

However, the source electrode of the TFT is connected to the data line, the gate electrode is connected to the scan line, and the drain electrode of the TFT is connected to the pixel electrode made of transparent indium tin oxide (ITO). Such a TFT is turned on when the scan signal is supplied to the scan line to supply the data signal supplied from the data line to the pixel electrode.

To this end, an integrated circuit 6 is mounted on one side of the second substrate 4b, and a data signal and a scan signal are supplied from the integrated circuit 6. A protective layer 8 is applied around the integrated circuit 6.

Since the integrated circuit 6 may malfunction when external light, that is, UV light, is introduced, the light shielding tape 103 and the conductive tape 100 for blocking light on the integrated circuit 6 in the conventional portable display device. However, as mentioned above, this not only increases the manufacturing cost but also hinders the slimming of the portable display device.

Accordingly, the present invention applies an integrated tape 70 in which the integrated circuit 6 is integrated with a conductive tape and a light shielding tape attached to block the exposure of the integrated circuit 6 to UV light and to obtain a grounding effect of ESD and EMI.

As shown in Fig. 3, the unitary tape 70 is composed of a conductive base material (conductive tape) 71 made of a conductive material having light blocking performance, and a non-conductive insulating adhesive 72 made of an insulating material.

The integrated tape 70 is attached to the integrated circuit 6, and the conductive base 71 is made of a conductive medium, and provides a light shielding performance, a grounding effect of electrostatic discharge (ESD), and electromagnetic magnetic interference (EMI). In addition, since the insulating adhesive 72 is non-conductive, it does not affect the operation of the integrated circuit (LSI).

The conductive material of the conductive base 71 is preferably any one selected from nickel (Ni), copper (Cu), gold (Au), silver (Ag), and the non-conductive insulating adhesive 72 is PET Or it is preferable to set it as PE type resin. However, the kind of the conductive material and the insulating adhesive 72 of the conductive base 71 is not limited thereto.

The present invention can reduce the thickness of the tape to half the level by applying the integrated tape 70 as described above, it can bring the effect of cost reduction.

In addition, the first substrate 4a of the first display panel 4 is disposed to face the second substrate 4b. The common electrode made of ITO is coated on the front surface of the first substrate 4a. A predetermined voltage is applied to the common electrode, thereby forming a predetermined electric field between the common electrode and the pixel electrode. The arrangement angle of the liquid crystal injected between the first substrate 4a and the second substrate 4b is changed by such an electric field, and the light transmittance is changed according to the changed arrangement angle to display a desired image.

However, since the first display panel 4 is a liquid crystal display panel, a backlight assembly 50 for irradiating light under the panel to display an image should be provided.

The backlight assembly 50 includes a mold frame 16, light emitting diodes 12, a light emitting diode substrate 14, a light guide plate 18, a reflector plate 20, and optical sheets 10.

Here, the light emitting diodes 12 generate light having a predetermined brightness in response to a driving signal from the light emitting diode substrate 14, and the light guide plate 18 receives light supplied from the light emitting diodes 12 from the liquid crystal display panel ( 4) Supply to. That is, the light guide plate 18 supplies the light supplied from its side to the first display panel 4 located above it.

In addition, the reflector 20 is located on the rear surface of the light guide plate 18 to re-inject light incident from the light guide plate 18 to the light guide plate 18. That is, the reflective plate 20 improves the light efficiency by resupplying the light incident on the light guide plate 18, and the first optical sheets 10 improve the brightness of the light supplied from the light guide plate 18. It supplies to the liquid crystal display panel 4.

In addition, the light emitting diode substrate 14 is connected to the first printed circuit board 24, supplies a driving signal to the light emitting diodes 12 in response to a control signal supplied from the first printed circuit board 24, and a mold frame. The light emitting diode substrate 14 on which the light emitting diodes 12 are mounted is accommodated and fixed to the first display panel 4 and the backlight assembly 50.

Here, the bottom chassis 22 is fixed to the mold frame 16 at the bottom of the mold frame 16, and an opening of the bottom chassis 22 may be inserted in the center portion of the bottom chassis 22 so that the second display panel 30 can be inserted. Is formed.

Next, the second printed circuit board 26 receives a driving signal from a mobile phone side driving circuit (not shown). To this end, the second printed circuit board 26 has a mobile phone connector 28. The mobile phone connector 28 is fixedly integrated with another connector attached to the mobile phone side driving circuit to receive a driving signal from the mobile phone side driving circuit, and the second printed circuit board 26 supplied with the driving signal is supplied to itself. Various control signals are generated in response to the driving signal.

Accordingly, the first printed circuit board 24 is connected to the second printed circuit board 26 through the first pad portion 38 formed on the second printed circuit board 26, which is a fusible printed circuit board (not shown). The FPCB is connected to the integrated circuit 6 and the light emitting diode substrate 14 of the first display panel 4. The first printed circuit board 24 connected to the integrated circuit 6 and the light emitting diode substrate 14 corresponds to the integrated circuit 6 and the light emitting diode in response to control signals supplied from the second printed circuit board 26. It serves to drive the substrate 14.

In addition, in the embodiment of the present invention, the second display panel 30 is implemented as an organic light emitting display panel, and the second display panel 30 includes a first substrate 30a and a second substrate 30b. .

Accordingly, organic light emitting diodes (not shown) are disposed on the second substrate 30a in a matrix form, and the organic light emitting diodes generate light having a predetermined luminance corresponding to the amount of current supplied thereto. The second display panel 30 is connected to the second printed circuit board 26 by the second pad part 36 of the fusible printed circuit board 32. Here, an integrated circuit 34 is mounted on the fusible printed circuit board 32, and the integrated circuit 34 responds to control signals supplied from the second printed circuit board 26 to display the second display panel 30. ), A predetermined image is displayed.

Here, the integrated circuit 34 of the second display panel 30 is mounted on the fusible printed circuit board 26, and the integrated circuit 34 is connected to the bottom chassis when the portable display device 60 is coupled. The external light, that is, UV is blocked by the 22), so that a separate light blocking tape does not need to be formed on the integrated circuit 34.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

As described above, according to the present invention, the conductive tape and the light-shielding tape on the integrated circuit mounted on the display panel of the portable display device are integrated to reduce the thickness to half level, thereby making the portable display device slimmer and reducing the cost. The rigidity of the portable display device can be improved to enhance product competitiveness.

Claims (11)

A first display panel mounted with an integrated circuit for supplying a data signal and a scanning signal to display an image; A tape attached to the integrated circuit to prevent the integrated circuit from being exposed to UV light and to obtain a grounding effect of ESD and EMI; And the tape is an integrated tape composed of a conductive base made of a conductive material having light blocking performance and a non-conductive insulating adhesive made of an insulating material. The method of claim 1, The conductive material of the conductive substrate is any one selected from nickel, copper, gold and silver. The method of claim 1, The non-conductive insulating adhesive is a portable display device, characterized in that any one selected from PET, PE-based resin. The method of claim 1, And a backlight assembly for irradiating light to the lower portion of the first display panel. The method of claim 4, wherein The backlight assembly may include a light emitting diode as a light source, a light emitting diode substrate on which the light emitting diode is mounted, a mold frame for accommodating and fixing the light emitting diode substrate, a light guide plate, a reflecting plate, and an optical sheet. Display. The method of claim 1, The first display panel is implemented as a liquid crystal display panel. The method of claim 6, The first display panel includes a first substrate; A second substrate having a plurality of thin film transistors formed in a display area bonded to the first substrate and an integrated circuit formed in a non-display area not bonded to the first substrate; And a liquid crystal injected between the first substrate and the second substrate. The method of claim 1, A second printed circuit board connected to an external driving circuit; A first printed circuit board mounted with a pad part connected to the second printed circuit board and controlling a light source included in the first display panel and the backlight assembly; And a second display panel connected to the second printed circuit board to display an image under the second printed circuit board. The method of claim 8, The second display panel is implemented as an organic electroluminescent display panel. The method according to any one of claims 4 to 9, The conductive material of the conductive substrate is any one selected from nickel, copper, gold and silver. The method according to any one of claims 4 to 9, The non-conductive insulating adhesive is a portable display device, characterized in that any one selected from PET, PE-based resin.

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