KR100748357B1 - Portable display device - Google Patents

Abstract

A portable display device is provided to achieve slimness of the portable display device, reduce a raw cost and simplify a structure thereof by coating an integrated circuit mounted on a display panel with a light blocking agent without using a light blocking tape. Display panels(4,30) display an image. Integrated circuits(6,34) are mounted to the display panels and supply a data signal and a scan signal. One or more printed circuit boards(24,26,32) control the display panels. A light blocking agent coating layer(80) is formed by coating the integrated circuit with a light blocking agent in order to prevent the integrated circuit from being exposed to a ultraviolet light. The light blocking agent coating layer is formed of a mixed liquid of a resin and any one selected from the group consisting of graphite and carbon black.

Description

Portable Display Device

1 is a perspective view illustrating a display panel 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 taken along the line A-A in FIG.

♣ 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

80: light-shielding coating layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable display device. In particular, a slimming device for a portable display device can be realized by coating a light shielding agent having a light shielding and insulating function in place of a UV light blocking tape on an integrated circuit mounted on a display panel of the portable display device. 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 organic light emitting display have been attracting attention as an alternative means to overcome the disadvantages of the conventional cathode ray tube due to the advantages of miniaturization, light weight and low power, and now mobile phones and PDA (Portable digital assistor) In addition to portable devices such as), it is also installed in medium and large-sized products such as monitors and TVs. In particular, most display devices of mobile devices such as mobile phones or PDAs currently employ almost all portable display devices such as liquid crystal displays or organic light emitting displays. It is a situation.

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 perspective view showing a display panel of a conventional portable display device, which is conventionally light-shielded on the integrated circuit 6 to block exposure of the integrated circuit 6 of the display panel 4 to UV light. Tape 70 was attached separately.

However, the portable display device that separately attaches the UV light shielding tape 70 on the integrated circuit 6 not only obstructs the slimming, but also increases the cost and weakens the rigidity of the portable display device, causing frequent breakdowns and damages. Problems that can cause problems can arise.

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 eliminating the light-shielding tape on the integrated circuit mounted on the display panel of the portable display device and coating the light-shielding agent, to realize a slimmer portable display device and to reduce the cost and It is an object of the present invention to provide a portable display device that can enhance product competitiveness due to the simplification of the structure.

In order to achieve the above object, the present invention provides a display panel for displaying an image, an integrated circuit mounted on the display panel to supply a data signal and a scan signal, and at least one printed circuit for controlling the display panel. A portable display device including a substrate and a light blocking agent coating layer formed by coating a light blocking agent on the integrated circuit to prevent exposure of the integrated circuit to UV light is provided.

Here, the light-shielding agent coating layer is made of a mixture of any one selected from graphite and carbon black and a resin, the resin may be an acrylic resin or a silicone 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 pixel region bonded to the first substrate and an integrated circuit formed in a non-pixel region 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.

2 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. 2, 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, in the conventional portable display device, a UV light blocking tape 70 is separately attached to the integrated circuit 6. This not only increases the manufacturing cost as mentioned above, but also hinders the slimming of the portable display device.

Accordingly, the present invention coats a light shielding agent that blocks UV light on the integrated circuit 6 to block the exposure of the integrated circuit 6 to UV light. 80).

Here, since the light-shielding agent coating layer 80 is applied directly on the integrated circuit 6, it is preferable to use graphite or carbon black as a light-shielding agent to have an insulating function, and the graphite or carbon black is mixed with a resin. To form a mixture.

The resin is preferably an acrylic resin or a silicone resin, but is not limited thereto.

Since the light-shielding agent coating layer 80 is formed by applying a resin solution mixed with graphite or carbon black to the integrated circuit 6, the integrated circuit 6 is prevented from being exposed to UV light, and the graphite or carbon black is prevented. Since the mixed resin solution is non-conductive, it does not affect the operation of the integrated circuit (LSI).

Therefore, the present invention can achieve the slimming of the portable display device by applying the light-shielding agent coating layer 80 as described above, and 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) to supply. 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, by removing the light-shielding tape on the integrated circuit mounted on the display panel of the portable display device and coating the light-shielding agent, the light-shielding function and the insulating function can be realized and the slimming of the portable display device can be achieved. There is an effect that can enhance the product competitiveness by reducing and improving the rigidity of the portable display device.

Claims (9)

A display panel displaying an image; An integrated circuit mounted on the display panel to supply a data signal and a scan signal; At least one printed circuit board for controlling the display panel; A light blocking agent coating layer formed by coating a light blocking agent on the integrated circuit to prevent the integrated circuit from being exposed to UV light; Portable display device comprising a. The method of claim 1, The light shielding coating layer is a portable display device comprising a mixture of any one selected from graphite and carbon black and a resin. The method of claim 2, The resin is any one selected from acrylic resin, silicone resin. The method of claim 1, And a backlight assembly for irradiating light under the 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 display panel is implemented as a liquid crystal display panel. The method of claim 6, The display panel includes a first substrate; A second substrate having a plurality of thin film transistors formed in a pixel region bonded to the first substrate and an integrated circuit formed in a non-pixel region not bonded to the first substrate; And a liquid crystal injected between the first substrate and the second substrate. The method of claim 1, The printed circuit board includes a second printed circuit board connected to an external driving circuit; A first printed circuit board having a pad unit connected to the second printed circuit board and controlling a light source included in the 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.

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