KR100793541B1 - 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 backlight assembly radiating light to a lower portion of the first display panel; A bottom chassis to secure the first display panel and the backlight assembly; And a printed circuit board installed on the bottom of the bottom chassis, wherein a hook for fixing the printed circuit board to the bottom chassis is integrally formed.

According to the present invention, by eliminating the tape for fixing the printed circuit board (PCB) or flexible printed circuit board (FPCB) on the lower surface of the backlight assembly to not only enhance the cost competitiveness, but also simplify the structure of the LCD module product competitiveness You can strengthen it.

Display, Backlight Unit, Bottom Chassis, Hook, Printed Circuit Board

Description

Portable Display Device

1 is an exploded perspective view illustrating an assembly structure of a backlight assembly and a printed circuit board of a conventional portable display device.

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

3 is a perspective view illustrating an embodiment of a bottom chassis and a printed circuit board shown in FIG. 2;

4 is a perspective view showing an embodiment of the bottom chassis and the printed circuit board shown in FIG.

5 is a partial cross-sectional view taken along line A-A of FIG.

Figure 6 is a perspective view showing another embodiment of the bottom chassis of the present invention.

FIG. 7 is a side view of another embodiment of the bottom chassis and the printed circuit board shown in FIG.

8 is an exploded perspective view illustrating a portable display device according to another exemplary embodiment of 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

26a: projection 28: connector

30: second display panel 36, 38: pad portion

40: fixing tape 50: backlight assembly

60: portable display device 70, 70a: bottom chassis

71,71a: Hook 72,72a: Fixing Hole

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable display device. In particular, by applying a hook to a bottom chassis provided in a portable display device to fix a printed circuit board, the structure of the LCD module is simplified by eliminating the fixing tape, and the cost reduction effect of the product The present invention relates to a portable display device.

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.

Since the liquid crystal display is not a device that emits light by itself, a light source for visually representing an image on the back of the liquid crystal display is required. As a light source of such a liquid crystal display, a backlight unit assembly is used.

1 is an exploded perspective view illustrating an assembly structure of a backlight assembly and a printed circuit board of a conventional portable display device, wherein the backlight assembly 50 includes a mold frame 16, light emitting diodes 12, and a light emitting diode substrate. 14, the light guide plate 18, the reflecting plate 20, and the optical sheets 10.

Here, the light emitting diodes 12 generate light having a predetermined luminance in response to a driving signal from the light emitting diode substrate 14, and the light guide plate 18 transfers light supplied from the light emitting diodes 12 to the liquid crystal display panel. Supply.

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. Supply to liquid crystal display panel.

The bottom chassis 22 fixing the liquid crystal display panel is also referred to as a bezel, and is basically configured to be coupled to the lower portion of the mold frame 16. The bottom chassis 22 fixes the backlight assembly 50 and the liquid crystal display panel. Do it.

A printed circuit board 26, which serves to drive the integrated circuit and the light emitting diode substrate 14 in response to control signals, is disposed below the backlight assembly 50. Conventionally, a lower portion of the backlight assembly 50 is provided. In order to fix the printed circuit board 26, a fixing tape 40 was used as shown in FIG. That is, the fixing tape 40 is attached to the lower surface of the backlight assembly 50 to fix the printed circuit board 26.

However, since the conventional method of fixing the printed circuit board 26 uses a separate fixing tape 40, the unit cost of the product increases due to the addition of the tape 40, and the assembly process increases. .

In addition, a portable display device having a plurality of tapes 40 inserted therein may not only interfere with slimming, but also weaken the rigidity of the portable display device, causing frequent failures and breakages.

Accordingly, there is a need to find a structural method for improving the rigidity while removing slips of a plurality of tapes provided in the portable display device, thereby realizing slippage of the portable display device.

Accordingly, the present invention has been made to solve the above problems, by removing the tape for fixing the printed circuit board (PCB) or flexible printed circuit board (FPCB) on the lower surface of the backlight assembly to enhance the cost competitiveness and assembly process In addition, the present invention provides a portable display device that can enhance the product competitiveness by slimming the structure of the portable display device and improving its rigidity.

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 backlight assembly radiating light to a lower portion of the first display panel; A bottom chassis to secure the first display panel and the backlight assembly; And a printed circuit board installed on a bottom surface of the bottom chassis, wherein a portable means for fixing the printed circuit board to the bottom chassis is integrally formed. .

Here, the fixing means is a hook which is formed downward on the side of the bottom chassis to secure the printed circuit board, the hook is formed with a fixing hole of a predetermined size inserting the protrusion formed on the side of the printed circuit board. do.

It is preferable that the fixing hole has a rectangular shape into which the protruding portion can be inserted, or an inclined surface is formed on a lower surface of the rectangle to form a hexagonal shape of a light receiving narrow.

In addition, the backlight assembly includes light emitting diodes 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.

In addition, the first display panel is implemented as a liquid crystal display panel, and the first display panel comprises: 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; Liquid crystal injected between the first substrate and the second substrate is included.

The display device may further include a second display panel connected to the printed circuit board to display an image. In this case, the second display panel may be implemented as an organic electroluminescent display panel.

On the other hand, another embodiment of the present invention for achieving the above object, the first display panel is mounted on an integrated circuit for supplying a data signal and a scan signal to display an image; A backlight assembly radiating light to a lower portion of the first display panel; A mold frame for installing a light guide plate or various sheets on the backlight assembly; And a printed circuit board installed on a rear surface of the backlight assembly, wherein the portable display device is provided with fixing means for fixing the printed circuit board to the mold frame.

The fixing means is a hook which is formed downward on the side of the mold frame to secure the printed circuit board, the hook is a fixing hole of a predetermined size that can be inserted into the protrusion formed on the side of the printed circuit board It is preferable that this be formed.

Here, the fixing hole is characterized in that the protrusion is inserted into a rectangular shape, or the inclined surface is formed on the lower surface of the rectangle is characterized in that the hexagonal shape of the upper and lower narrow.

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 70, 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.

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, and supplies driving signals to the light emitting diodes 12 in response to a control signal supplied from the first printed circuit board 24. In the mold frame 16, a light emitting diode substrate 14 on which the light emitting diodes 12 are mounted is received and fixed, and the first display panel 4 and the backlight assembly 50 are fixedly supported.

Here, the bottom chassis 70 is fixed to the mold frame 16 at the bottom of the mold frame 16, and an opening of the bottom chassis 70 is inserted in the central portion of the bottom chassis 70 so that the second display panel 30 can be inserted. Is formed.

The bottom chassis 70 is also referred to as a bezel, and as shown in the present invention, fixing means for fixing a printed circuit board or a flexible printed circuit board (FPCB) to the bottom chassis 70 is integrated. Is formed. In the exemplary embodiment of the present invention, a hook 71 formed downward on the side of the bottom chassis 70 is used as the fixing means.

The hook 71 is integrally formed on both side surfaces of the bottom chassis 70, and is formed to protrude a predetermined length in a downward direction and is positioned below the bottom chassis 70 when the portable display device 60 is coupled. It serves to fix the circuit board 26.

However, in the exemplary embodiment of the present invention, the hook 71 of the bottom chassis 70 fixes the second printed circuit board 26 as an example, but not only the second printed circuit board 26. It is also possible to form a hook to fix the first printed circuit board 24 or the flexible printed circuit board 32, but the present invention is not limited thereto.

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 part 38 formed on the second printed circuit board 26, which is not shown in the flexible printed circuit board. 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 flexible printed circuit board 32. Here, an integrated circuit 34 is mounted on the flexible printed circuit board 32, and the integrated circuit 34 corresponds to the 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 flexible printed circuit board 32, 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 70, so that it is not necessary to form a separate light blocking tape on the integrated circuit 34.

FIG. 3 is a perspective view illustrating an example of the bottom chassis and the printed circuit board of FIG. 2, and FIG. 4 is a perspective view illustrating an example of the bottom chassis and the printed circuit board of FIG. 2. FIG. 5 is a partial cross-sectional view of line AA of FIG. 4.

Referring to FIG. 3, hooks 71 for fixing side surfaces of the second printed circuit board 26 to both sides of the bottom chassis 70 are formed downward.

In the center of the hook 71, a fixing hole 72 into which the protrusion 26a formed on the side of the second printed circuit board 26 is inserted is formed.

Accordingly, when the bottom chassis 70 and the second printed circuit board 26 are coupled to each other, as shown in FIGS. 4 and 5, the second printed circuit board 26 is fixed to the fixing hole 72 of the hook 71. The second printed circuit board 26 can be fixed by inserting the protrusion 26a formed on the side surface of the substrate.

Here, the fixing hole 72 is preferably in the shape of a rectangle so that the protrusion 26a can be inserted. In one embodiment of the present invention, the second printed circuit board is assembled when the portable display device 60 is assembled. Since the 26 is fixed by using the hook 71 formed integrally with the bottom chassis 70, the second printed circuit board 26 can be fixed without the conventional fixing tape.

Therefore, by removing the tape for fixing the printed circuit board 26 or the flexible circuit board on the lower surface of the backlight assembly 50, it is possible to enhance the cost competitiveness and reduce the assembly process. In addition, the structure of the portable display device 60 may be slimmed down and rigidity may be enhanced to enhance product competitiveness.

6 is a perspective view illustrating another embodiment of the bottom chassis of the present invention, and FIG. 7 is a side view illustrating another embodiment of the bottom chassis and the printed circuit board of FIG. 6, wherein the hook 71a is illustrated. The fixing hole 72a is not a rectangular shape but a hexagonal shape of a light receiving narrow.

In detail, the fixing hole 72a has an inclined surface formed on a lower surface of a rectangle having a size that allows the protrusion 26a of the second printed circuit board 26 to be inserted into a hexagonal shape of a light beam narrow.

In this case, since the area of the fixing hole 72a is large, the protrusion 26a of the second printed circuit board 26 is more easily inserted, so that the protrusion 26a is easily formed due to the inclined surface formed on the bottom surface. The fixed state of the second printed circuit board 26 may be maintained without being separated.

8 is an exploded perspective view illustrating a portable display device according to another embodiment of the present invention. When the bottom chassis is not applied to the backlight assembly 50, the printed circuit is mounted on the mold frame 80 of the backlight assembly 50. Hook 81 is integrally formed as a fixing means for fixing the substrate.

Like the embodiment of the present invention, the hook 81 has a fixing hole of a predetermined size into which the protrusion formed on the side of the printed circuit board 26 can be inserted, and the fixing hole has a rectangular shape into which the protrusion can be inserted. The inclined surface is formed in the lower surface of a rectangle, and it can be set as the hexagon shape of an upper and lower narrow narrow.

As such, the portable display device in which the hook 81 is formed in the mold frame 80 is coupled to the lower surface of the backlight assembly 50 after the assembly of the backlight assembly 50. By inserting the protruding portion 26a formed on the side surface of the printed circuit board 26, the second printed circuit board 26 may be fixed.

Therefore, the printed circuit board can be easily fixed with the hook 81 without a separate tape for fixing the second printed circuit board 26 to the bottom surface of the backlight assembly 50, thereby reducing cost and simplifying the assembly process. Can be achieved.

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, a tape for fixing a printed circuit board (PCB) or a flexible printed circuit board (FPCB) to the bottom surface of the backlight assembly is removed, thereby enhancing cost competitiveness and reducing the assembly process as well as a portable display device. It has the effect of strengthening the product competitiveness by slimming the structure and improving the rigidity.

Claims (19)

A first display panel mounted with an integrated circuit for supplying data signals and scanning signals to display an image; A backlight assembly radiating light to a lower portion of the first display panel; A bottom chassis to secure the first display panel and the backlight assembly; And In the portable display device is provided on the bottom of the bottom chassis, the printed circuit board having a protrusion formed on the side, And a fixing means having fixing holes on both sides of the bottom chassis downwardly, and the protrusions on the side surface of the printed circuit board are inserted into the fixing holes. delete delete The method of claim 1, The fixing hole is a portable display device, characterized in that the protrusion is inserted into a rectangular shape. The method of claim 1, The fixing hole is a portable display device, characterized in that the inclined surface is formed on the lower surface of the rectangle is a hexagonal shape of the light-receiving narrow. The method of claim 1, 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 7, wherein The first display panel includes a first substrate; A second substrate having a plurality of thin film transistors formed in the 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, And a second display panel connected to the printed circuit board to display an image. The method of claim 9, The second display panel is implemented as an organic electroluminescent display panel. A first display panel mounted with an integrated circuit for supplying data signals and scanning signals to display an image; A backlight assembly radiating light to a lower portion of the first display panel; A mold frame for installing a light guide plate or various sheets on the backlight assembly; And A portable display device provided on a rear surface of the backlight assembly and including a printed circuit board having protrusions on a side thereof. And a fixing means having fixing holes at both sides of the mold frame protrudes downward, and the protrusions of the side surfaces of the printed circuit board are inserted into the fixing holes. delete delete The method of claim 11, The fixing hole is a portable display device, characterized in that the protrusion is inserted into a rectangular shape. The method of claim 11, The fixing hole is a portable display device, characterized in that the inclined surface is formed on the lower surface of the rectangle is a hexagonal shape of the light-receiving narrow. The method of claim 11, The first display panel is implemented as a liquid crystal display panel. The method of claim 16, 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 11, And a second display panel connected to the printed circuit board to display an image. The method of claim 18, The second display panel is implemented as an organic electroluminescent display panel.

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