KR20060040962A - Flexible printed circuit borad and display apparatus having the flexible printed circuit borad - Google Patents

Abstract

A display device having a flexible circuit board and a flexible circuit board having improved display quality of an image is disclosed. The flexible circuit board includes a first insulating layer, a wiring, and a second insulating layer. The first insulating layer includes a first side, a second side facing the first side, and a side surface connecting the first side and the second side, and having a rounding part formed thereon. The wiring is disposed on the first side of the first insulating layer. The second insulating layer is disposed on the first side of the first insulating layer, exposing a portion of the wiring and insulating the rest of the wiring. As the rounded rounded portion is formed at the end of the flexible circuit board, it is possible to prevent the signal line of the display board from being disconnected.

Description

FLEXIBLE PRINTED CIRCUIT BORAD AND DISPLAY APPARATUS HAVING THE FLEXIBLE PRINTED CIRCUIT BORAD}

1 is a cross-sectional view illustrating a flexible circuit board according to a first embodiment of the present invention.

2 is a cross-sectional view illustrating a flexible circuit board according to a second exemplary embodiment of the present invention.

3 is a cross-sectional view illustrating a flexible circuit board according to a third exemplary embodiment of the present invention.

4 is a cross-sectional view illustrating a display device according to a fourth exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: first insulating layer 110, 120, 130: rounding part

200: wiring 300: second insulating layer

400: flexible circuit board 500: display board

510: first substrate 512: signal line

520: second substrate 530: liquid crystal layer

600: light generating device 700: storage container

800: display device

The present invention relates to a flexible printed circuit board, a display panel having a flexible printed circuit board, and a display device having a display panel. More specifically, the present invention relates to a flexible circuit board having a display line of a flexible printed circuit board having a flexible printed circuit board, a display panel having a flexible printed circuit board, which prevents disconnection of signal lines of the display substrate, thereby improving image display quality.

In general, various electronic devices such as a mobile communication terminal, a digital camera, a notebook computer, and a monitor include a display device for displaying an image in response to an image signal input from the outside.

Various types of display devices, for example, cathode-ray tube (CRT), liquid crystal display (LCD), plasma display panel (PDP), field radiation display device (Field) Emission Display (FED) and Electro Luminescence Display (EL).

Among these, a liquid crystal display (LCD) displays an image by using optical characteristics of a liquid crystal. Liquid crystal displays (LCDs) have the advantages of being thinner and lighter than other displays and operating at low power consumption and low driving voltage.

Conventional liquid crystal display (LCD) has a display plate for displaying an image using light transmittance, a printed circuit board for generating a driving signal necessary for displaying the image, and a display board and a printed circuit board. And a flexible circuit board which electrically connects the circuit board to provide a driving signal to the display substrate.                         

In general, a flexible circuit board includes a base body having a long tape shape, signal lines disposed on the base body, and manufactured by cutting the base body to a predetermined length. As a result, the end of the cut flexible printed circuit board has a sharp raised shape.

However, a flexible printed circuit board having sharp ends has a problem of disconnecting signal lines of an electrically connected display substrate by applying pressure.

Accordingly, the present invention has been made in view of such a conventional problem, and a first object of the present invention is to provide a flexible circuit board which improves the display quality of an image by preventing the signal line of the display board from being disconnected through shape deformation.

In addition, a second object of the present invention is to provide a display device having the flexible circuit board.

The flexible circuit board for achieving the first object of the present invention includes a first insulating layer, a wiring and a second insulating layer.

The first insulating layer includes a first side, a second side facing the first side, and a side surface connecting the first side and the second side, and having a rounding part formed thereon. Preferably, the round portion has a curved shape. The wiring is disposed on the first side of the first insulating layer. The second insulating layer is disposed on the first side of the first insulating layer, exposing a portion of the wiring and insulating the rest of the wiring.                     

In addition, the display device for achieving the second object of the present invention includes a flexible circuit board and a display substrate.

The flexible circuit board includes a first insulating layer, a wiring, and a second insulating layer. The first insulating layer includes a first side, a second side facing the first side, and a side surface connecting the first side and the second side, and having a rounding part formed thereon. Preferably, the round portion has a curved shape. The wiring is disposed on the first surface of the first insulating layer and an electrical signal is applied. The second insulating layer is disposed on the first side of the first insulating layer, exposing a portion of the wiring and insulating the rest of the wiring. The display substrate is electrically connected to the wiring and displays an image based on the electrical signal.

According to the present invention, in order to prevent the signal line of the display board electrically connected by the sharp end of the flexible circuit board from being disconnected, the round part is formed by removing the peak portion of the end.

The flexible circuit board of the present invention includes a first insulating layer, a wiring and a second insulating layer.

The first insulating layer includes a first side, a second side facing the first side, and a side connecting the first side and the second side. The rounding part is formed in the side surface of this invention, Preferably, the round part has the shape of a curved surface. Alternatively, the round portion may have a shape of a plane in which the parent portion is removed.

In this embodiment, the rounded portion at the end of the first insulating layer may be formed by grinding by a polishing member, for example, sandpaper.                     

For example, the first insulating layer of the present invention may include a synthetic resin, and more specifically, may include a flexible synthetic resin.

The wiring is arranged on the first side of the first insulating layer, for example at least two are arranged in a parallel manner. The wiring 200 according to the present embodiment may include a conductive metal material having low electrical resistance, for example, copper (Cu), silver (Au), and the like.

The second insulating layer is disposed on the first surface of the first insulating layer, and the wiring is electrically insulated from the outside by the second insulating layer. The second insulating layer 300 of the present invention may be made of, for example, the same synthetic resin as the material forming the first insulating layer. In the present invention, part of the second insulating layer is removed so that part of the wiring can be electrically contacted with the external signal line. For example, part of the second insulating layer is removed so that both ends of the wiring can be exposed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Flexible circuit board

Example 1

1 is a cross-sectional view illustrating a flexible circuit board according to a first embodiment of the present invention.

Referring to FIG. 1, the flexible circuit board 400 according to the present exemplary embodiment includes a first insulating layer 100, a wiring 200, and a second insulating layer 300.

The first insulating layer 100 includes a first side 102, a second side 104 facing the first side 102, and a side connecting the first side 102 and the second side 104. do.

The rounding part 110 having a curved shape is formed on the side surface according to the present embodiment, and the rounding part 110 according to the present embodiment connects the first surface 102, the second surface 104, and the side surface. It has the shape of a curved surface. In the present exemplary embodiment, the round part 110 may be formed by grinding an end of the first insulating layer 100 by an abrasive member (not shown).

The wiring 200 is disposed on the first surface 102 of the first insulating layer 100, for example, at least two are arranged in a parallel manner.

The second insulating layer 300 is disposed on the first surface 112 of the first insulating layer 100, and the wiring 200 is electrically insulated from the outside by the second insulating layer 300. In this embodiment, a part of the second insulating layer 300 is removed so that a part of the wirings 200 can be electrically contacted with an external signal line.

According to the present exemplary embodiment, since the parent portion formed at the end of the flexible circuit board 400 is removed, and a round portion having a curved shape is formed at the end, the signal line of the display board electrically connected to the flexible circuit board 400 is disconnected. Can be prevented.

Example 2

2 is a cross-sectional view illustrating a flexible circuit board according to a second exemplary embodiment of the present invention.

2, the flexible circuit board 400 according to the present exemplary embodiment includes a first insulating layer 100, a wiring 200, and a second insulating layer 300. The first insulating layer 100 includes a first side 102, a second side 104 facing the first side 102, and a side connecting the first side 102 and the second side 104. do.

Rounding part 120 having a curved shape is formed on the side surface according to the present embodiment, the rounding part 120 according to the present embodiment has a first surface 102 and the edge formed by the side, for example, It may be formed by grinding (grinding) by the abrasive member.

The wiring 200 is disposed on the first surface 102 of the first insulating layer 100, for example, at least two are arranged in a parallel manner.

The second insulating layer 300 is disposed on the first surface 112 of the first insulating layer 100, and the wiring 200 is electrically insulated from the outside by the second insulating layer 300. In this embodiment, a part of the second insulating layer 300 is removed so that a part of the wirings 200 can be electrically contacted with an external signal line.

Example 3

3 is a cross-sectional view illustrating a flexible circuit board according to a third exemplary embodiment of the present invention.

Referring to FIG. 3, the flexible circuit board 400 according to the present exemplary embodiment includes a first insulating layer 100, a wiring 200, and a second insulating layer 300.

The first insulating layer 100 includes a first side 102, a second side 104 facing the first side 102, and a side connecting the first side 102 and the second side 104. do.

The rounding part 130 having a curved shape is formed on the side surface according to the present embodiment, and the rounding part 130 according to the present embodiment has a first surface 102, a side surface, a second surface 104, and a side surface. It is formed at each corner formed by the surface. For example, it may be formed by grinding (grinding) by an abrasive member.

The wiring 200 is disposed on the first surface 102 of the first insulating layer 100, for example, at least two are arranged in a parallel manner.

The second insulating layer 300 is disposed on the first surface 112 of the first insulating layer 100, and the wiring 200 is electrically insulated from the outside by the second insulating layer 300. In this embodiment, a part of the second insulating layer 300 is removed so that a part of the wirings 200 can be electrically contacted with an external signal line.

Display

Example 4

4 is a cross-sectional view illustrating a display device according to a fourth exemplary embodiment of the present invention. Since the flexible circuit board according to the fourth embodiment of the present invention has the same configuration as the flexible circuit board of the first embodiment described above, duplicate description thereof will be omitted, and the same reference numerals and names are used for the same components. Let's do it.

Referring to FIG. 4, the display device 800 according to the present exemplary embodiment includes a flexible circuit board 400 and a display substrate 500.

The display substrate 500 according to the present embodiment is electrically connected to the wiring 200 of the flexible circuit board 400 and displays an image based on the electrical signal by the wiring 200.

The display substrate 500 according to the present exemplary embodiment includes, for example, a first substrate 510, a second substrate 520, and a liquid crystal layer 530.

The first substrate 510 includes a plurality of pixel electrodes arranged in a matrix form, thin film transistors (TFTs), and thin film transistors disposed at each pixel electrode to apply a driving voltage to each pixel electrode. Signal lines 512 for operating the respective TFTs. In this embodiment, each signal line 512 is electrically connected to the wiring 200 of the flexible circuit board 400.

The second substrate 520 is disposed to face the first substrate 510. The second substrate 520 is formed on a surface of the second substrate 520 facing the pixel electrode formed on the first substrate 510, and is a transparent and conductive common electrode, and faces each pixel electrode. Disposed color filters.

The color filters include a red color filter selectively passing red light of white light, a green color filter selectively passing green light of white light, and blue color filters selectively passing blue light of white light. The liquid crystal layer 530 is interposed between the first substrate 510 and the second substrate 520 and is rearranged by an electric field formed between the pixel electrode and the common electrode. The light transmittance of light generated from the outside by the rearranged liquid crystal layer 530 is controlled, and the light controlled by the liquid crystal layer 530 passes through the color filter to display an image.

The display device 800 according to the present exemplary embodiment may further include a printed circuit board 450 for generating a driving signal, a light generating device 600 for generating light, and a storage container 700. Optionally, the display device 800 according to the present exemplary embodiment may further include an optical sheet (not shown) for improving optical characteristics of light.

The printed circuit board 450 according to the present exemplary embodiment includes a driving circuit (not shown) for generating a driving signal for controlling the thin film transistor TFT and a driving signal line 452 for transmitting the driving signal.

The driving signal line 452 of the printed circuit board 450 is electrically connected to the wiring 452 of the flexible circuit board 400, and the driving signal generated from the printed circuit board 450 is firstly connected through the wiring 452. The signal is transmitted to the signal line 512 of the substrate 510.

The light generating apparatus 700 according to the present exemplary embodiment is disposed under the display substrate 600 to provide light to the display substrate 600.

The light generating apparatus 700 according to the present embodiment is, for example, a cold cathode fluorescent lamp (CCFL) having high luminance and low calorific value. Alternatively, it may be a light emitting diode (LED) having a light source in the form of a point or a flat fluorescent lamp (FFL) having a light source in the form of a plane.

The storage container 800 accommodates the display panel 600 and the light generating device 700 and protects the display panel 600 and the light generating device 700 from external shock.

The optical sheets are disposed between the light generating apparatus 700 and the display panel 600, and improve optical characteristics of light generated by the light generating apparatus 700.

The optical sheets according to the present embodiment may include, for example, a diffusion sheet for diffusing light and at least one prism sheet for improving vertical luminance of light through reflection and refraction of light.

According to the present invention, the sharp edge portion formed at the end of the flexible circuit board is cut and removed or ground, and a round part having a curved shape is formed at the end, so that the signal line of the display board electrically connected to the flexible circuit board is formed. Disconnection can be prevented. As a result, the display quality of the image of the display device is improved.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (10)

A first insulating layer including a first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface and having a rounding portion formed thereon; Wiring disposed on a first surface of the first insulating layer; And And a second insulating layer disposed on the first surface of the first insulating layer, the second insulating layer exposing a part of the wiring and insulating the rest of the wiring. The flexible circuit board of claim 1, wherein the rounded portion has a curved shape. The flexible circuit board of claim 1, wherein the rounding part is formed by grinding an end portion of the first insulating layer by a polishing member. The flexible circuit board of claim 1, wherein the rounding part is formed at a first corner formed by the side surface and the first surface. The flexible circuit board of claim 1, wherein the rounding part is formed at a second corner formed by the side surface and the second surface. The flexible circuit board of claim 1, wherein the first insulating layer and the second insulating layer are made of a flexible synthetic resin. A first insulating layer comprising a first surface, a second surface facing the first surface, and a side surface connecting the first surface and the second surface and having a rounding portion formed thereon, and on the first surface of the first insulating layer. A flexible circuit board disposed on the first surface of the first insulating layer and a wire to which an electrical signal is applied, and a second insulating layer to expose a part of the wire and insulate the rest of the wire; And And a display substrate electrically connected to the wiring and displaying an image based on the electrical signal. The display device of claim 7, wherein the rounding part has a curved shape. The display device of claim 7, wherein the rounding part is formed at a first corner formed by the side surface and the first surface. The display device of claim 7, wherein the rounding part is formed at a second corner formed by the side surface and the second surface.

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