KR20060009962A - Printed circuit board for display apparatus, display panel having the printed circuit board and display apparatus having the display panel - Google Patents

Abstract

Disclosed are a circuit board for a display device, a display panel having the same, and a display device having the same. The circuit board for the display device includes a body, mounting regions, signal patterns, and joining portions. The body has a plate shape, and a plurality of mounting regions are formed along one side of the body, and a plurality of signal patterns are formed on one surface of the body to provide a driving signal to the mounting regions. A plurality of recesses are formed by removing part of the body from an area other than the mounting areas of one side of the body. As described above, the shape of the circuit board for the display device may be improved to reduce the manufacturing cost of the circuit board for the display device.

Description

       Circuit board for display device, display panel having same and display device having same {PRINTED CIRCUIT BOARD FOR DISPLAY APPARATUS, DISPLAY PANEL HAVING THE PRINTED CIRCUIT BOARD AND DISPLAY APPARATUS HAVING THE DISPLAY PANEL}

1 is a perspective view illustrating a circuit board for a display device according to a first embodiment of the present invention.

FIG. 2 is a plan view in which circuit boards for the display device of FIG. 1 are alternately arranged on a mother circuit board. FIG.

3 is a perspective view illustrating a circuit board for a display device according to a second exemplary embodiment of the present invention.

4 is a plan view in which circuit boards for the display device of FIG. 3 are alternately arranged on a mother circuit board.

5 is a perspective view illustrating a display panel according to a third exemplary embodiment of the present invention.

6 is an enlarged plan view of the pixel portion of FIG. 3.

7 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, 200: circuit board for display device 110, 210: body

 120, 220: Mounting area 130, 230: Signal pattern                 

 140, 240: depression 140: flexible circuit board

800: display panel 300: first substrate

 400: second substrate 500: liquid crystal layer

 600: circuit board 700: flexible circuit board

 1000: display device 850: storage container

 900: light source

The present invention relates to a circuit board for a display device, a display panel having the same, and a display device having the same.

In general, various electronic devices such as mobile communication terminals, digital cameras, notebook computers, and monitors include display devices for displaying processed electrical format data as images.

Display devices are Cathode-Ray Tube, Liquid Crystal Display, Plasma Display Panel, Field Emission Display and Electro Luminescence Etc. are representative.

Among them, a liquid crystal display is a flat panel display that displays an image using liquid crystal, and is thinner and lighter than other display devices, and has low power consumption and low driving voltage. It has a feature of operating in the world, and is widely used in most information processing devices.

Conventional liquid crystal display devices include a display panel in which a liquid crystal is accommodated to display an image, a circuit board for driving a liquid crystal, and a tape carrier package (TCP) for connecting the display panel and the circuit board.

Among them, a plurality of circuit boards are manufactured by being dried from a mother substate. The circuit board for the liquid crystal display device is very expensive because it has a very thin thickness and has a multilayer circuit pattern of at least two layers or more.

When manufacturing a conventional circuit board, there is a lot of wasted portion of the mother circuit board is not efficiently made from the mother circuit board from the mother circuit board, and this causes a problem that the manufacturing cost of the circuit board increases.

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 circuit board for a display device in which the shape is improved and the manufacturing cost is further reduced.

Further, a second object of the present invention is to provide a display panel having the circuit board for the display device.

In addition, a third object of the present invention is to provide a display device having the display panel.

Such a circuit board for a display device for achieving the first object of the present invention includes a body, mounting areas, signal patterns and joining portions. The body has a plate shape, and a plurality of mounting regions are formed along one side of the body, and a plurality of signal patterns are formed on one surface of the body to provide a driving signal to the mounting regions. A plurality of recesses are formed by removing part of the body from an area other than the mounting areas of one side of the body.

In addition, the display panel for achieving the second object of the present invention includes a first substrate, a second substrate, a liquid crystal layer, a circuit board and a flexible circuit board. The first substrate includes a plurality of signal lines extending to an end of the first substrate and channel portions formed at predetermined intervals by grouping a plurality of signal lines extending to an end of the first substrate to display an image. The second substrate is disposed to face the first substrate, and the liquid crystal layer is interposed between the first substrate and the second substrate. The circuit board includes a body having a plate formation, a plurality of mounting regions formed along one side of the body, a plurality of signal patterns formed on one surface of the body to provide a driving signal to the mounting regions, and the mounting regions of one side of the body. A portion of the body is removed from the other area includes a plurality of recesses formed. The flexible circuit board electrically connects the mounting regions and the channel portion.

In addition, a display device for achieving the third object of the present invention includes a display panel, a storage container, and a light source. The display panel includes a first substrate, a second substrate, a liquid crystal layer, a circuit board, and a flexible circuit board. The first substrate includes a plurality of signal lines extending to an end of the first substrate and channel portions formed at predetermined intervals by grouping a plurality of signal lines extending to an end of the first substrate to display an image. The second substrate is disposed facing the first substrate, and the liquid crystal layer is interposed between the first substrate and the second substrate. The circuit board includes a body having a plate formation, a plurality of mounting regions formed along one side of the body, a plurality of signal patterns formed on one surface of the body to provide a driving signal to the mounting regions, and the mounting regions of one side of the body. A portion of the body is removed from the other area includes a plurality of recesses formed. The flexible circuit board electrically connects the mounting regions and the channel portion. The storage container accommodates the display panel, and the light source is accommodated in the storage container to provide light toward the display panel.

According to the present invention, it is possible to reduce the manufacturing cost of the circuit board by changing the shape of the circuit board, and also reduce the manufacturing cost of the display panel and the display device.

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

For display Circuit board

Example  One

1 is a perspective view illustrating a circuit board for a display device according to a first embodiment of the present invention. FIG. 2 is a plan view in which circuit boards for the display device of FIG. 1 are alternately arranged on a mother circuit board. FIG.

Referring to FIG. 1, the circuit board 100 for a display device according to the present exemplary embodiment includes a body 110, mounting regions 120, signal patterns 130, and recesses 140.

The body 110 has a first face 112, a second face 114 disposed parallel to the first face 112, and a side face 116 interconnecting the first face 112 and the second face 114. ) The first side 112 and the second side 114 of the body 110 have a plate shape having an L shape when viewed in plan view.

The mounting regions 120 are formed in plural along one side of the body 110. Mounting areas 120 according to the present embodiment are formed spaced apart at the same interval.

A plurality of signal patterns 130 are formed on the first surface 112 of the body 110 to provide a driving signal to each mounting area 120. Each signal pattern 130 according to the present exemplary embodiment includes a signal line 132 and an output pad 134 electrically connected to the signal line 132.

The signal lines 132 receive the driving signal from the driving circuit 136 generating the driving signal and transmit the driving signal to the output pads 134. The output pads 134 receiving the driving signal transmit the driving signal to the outside. The output pads 134 according to the present exemplary embodiment are grouped in a predetermined number and disposed on each mounting area 120.

The recesses 140 may be formed by removing a portion of the body 110 from a region where the mounting regions 120 are not formed among one side of the body 110. There is no signal pattern 130 in the portion of the body 110 removed to form the depressions 140.

The depressions 140 according to the present embodiment may have a trapezoidal shape, and may have a quadrangular or other shape. In addition, each recess 140 according to the present exemplary embodiment has a uniform shape and the same shape as the mounting regions 120.

In the present embodiment, the body 110 of the circuit board 100 for the display device has a symmetrical structure in which the number of the recesses 140 is different from the number of the mounting regions 120, but the recesses 140 are different from each other. The number of) and the number of mounting regions 120 may have the same asymmetrical structure.

A flexible circuit board 150 may be further disposed in each mounting area 120 according to the present embodiment. The flexible circuit boards 150 are electrically connected to the signal patterns 130 to transmit driving signals to the outside.

The flexible circuit board 150 includes input terminals 152, output terminals 154, conductive lines 156, and driving ICs 158.

The input terminals 152 are electrically connected to output pads 134 formed in each mounting area 120 of the circuit board 100 through an anisotropic conductive film (ACF). The input terminals 152 are electrically connected to the conductive lines 156, and the conductive lines 156 are electrically connected to the driving ICs 158. The driving ICs 158 convert driving signals applied to the input terminals 152 into image control signals necessary for displaying images, and output them to the outside through the output terminals 154 at a specified timing. The image control signal generated by the driving ICs 158 is applied to the output terminals 154 through each conductive line 156.

Hereinafter, the function and role of the mounting area 120 of the display device circuit board 100 according to the present embodiment will be described by the manufacturing process of the display device circuit board 100.

Referring to FIG. 2, reference numeral 160 is a mother circuit board for forming the circuit boards 100 according to the present embodiment. The mother circuit board 160 includes a plurality of circuit boards 100. The mother circuit board 160 is formed to have a standardized size such as, for example, 304 x 510 mm, 405 x 510 mm, 510 x 610 mm in width and length.                     

The mounting regions 120 of the circuit boards 100 disposed on the mother circuit board 160 are arranged to engage with each other. As described above, each circuit board 100 is dried from the mother circuit board 160 in a state in which the mounting areas 120 of the at least two circuit boards 100 are interlocked with each other, thereby embedding the mounting areas 120. Circuit boards 100 having alternating portions 140 are manufactured.

Where the signal patterns 130 are formed and electrically connected to the flexible circuit boards 150, the mounting regions 120 are formed, and the signal patterns 130 are not formed, and thus the flexible circuit boards 150 are not formed. Where the electrical connection is not removed from the circuit board 100 to form the recesses 140, when forming at least two circuit board 100 on the parent circuit board 160 of each circuit board 100 The mounting regions 120 may be disposed to mesh with each other to be dried. As a result, more circuit boards 100 can be obtained from the mother circuit board 160, and the productivity can be greatly improved.

Example  2

3 is a perspective view illustrating a circuit board for a display device according to a second exemplary embodiment of the present invention.

4 is a plan view in which circuit boards for the display device of FIG. 3 are alternately arranged on a mother circuit board.

Referring to FIG. 3, the circuit board 200 for a display device according to the present exemplary embodiment includes a body 210, mounting regions 220, signal patterns 230, and recesses 240.                     

The body 210 has a first side 212, a second side 214 disposed parallel to the first side 212, and a side 216 interconnecting the first side 212 and the second side 214. ) Body 210 has a plate shape having a cuboid shape.

The mounting regions 220 are formed in plural along one side of the body 210. Mounting areas 220 according to the present embodiment are formed spaced apart at the same interval.

A plurality of signal patterns 230 are formed on the first surface 212 of the body 210 to provide a driving signal to each mounting area 220. Each signal pattern 230 according to the present exemplary embodiment includes a signal line 232 and an output pad 234 electrically connected to the signal line 232.

The signal lines 232 receive the driving signal from the driving circuit 236 generating the driving signal and transmit the driving signal to the output pads 234. The output pads 234 receiving the driving signal transmit the driving signal to the outside. The output pads 234 according to the present exemplary embodiment are grouped in a predetermined number and disposed on each mounting area 220.

The depression 240 is formed by removing a portion of the body 110 in a region in which the mounting regions 120 are not formed among one side of the body 210. There is no signal pattern 230 in the portion of the body 210 removed to form the depressions 240.

The depressions 240 according to the present embodiment may have a trapezoidal shape, and may have a quadrangular or other shape. In addition, each recess 240 according to the present exemplary embodiment has a uniform shape and the same shape as the mounting regions 220.

In the present exemplary embodiment, the body 210 of the circuit board 200 for the display device has a symmetrical structure in which the number of the recesses 240 is different from the number of the mounting regions 220. The number of) and the number of mounting regions 220 may have the same asymmetrical structure.

A flexible circuit board 250 may be further disposed in each mounting area 220 according to the present embodiment. The flexible circuit boards 250 are electrically connected to the signal patterns 230 to transmit driving signals to the outside.

The flexible circuit board 250 includes input terminals 252, output terminals 254, conductive lines 256, and driving ICs 258.

The input terminals 252 are electrically connected to output pads 234 formed in each mounting area 220 of the circuit board 100 through an anisotropic conductive film (ACF). The input terminals 252 are electrically connected to the conductive lines 256, and the conductive lines 256 are electrically connected to the driving ICs 258. The driving ICs 258 convert driving signals applied to the input terminals 252 into image control signals necessary for displaying images, and output them to the outside through the output terminals 254 at a specified timing. The image control signal generated by the driving ICs 258 is applied to the output terminals 254 through the conductive lines 256.

Hereinafter, the function and role of the mounting area 220 of the display device circuit board 200 according to the present embodiment will be described by the manufacturing process of the display device circuit board 200.

Referring to FIG. 4, reference numeral 260 is a mother circuit board for forming the circuit boards 200 according to the present embodiment. A plurality of circuit boards 200 are disposed on the mother circuit board 260. The mother circuit board 260 is, for example, formed in standardized sizes such as 304 × 510 mm, 405 × 510 mm, 510 × 610 mm, respectively.                     

The mounting regions 220 of the respective circuit boards 200 disposed on the mother circuit board 260 are arranged to engage with each other. As described above, each circuit board 200 is dried from the mother circuit board 260 in a state in which the mounting areas 220 of the at least two circuit boards 200 are interlocked with each other so as to be embedded with the mounting areas 220. Circuit boards 200 having alternating portions 240 are manufactured.

Where the signal patterns 230 are formed and electrically connected to the flexible circuit boards 250, the mounting regions 220 are formed, and the signal patterns 230 are not formed, and thus the flexible circuit boards 250 are not formed. Where the electrical connection is not removed from the circuit board 200 to form the recesses 240, when forming at least two circuit board 200 on the parent circuit board 260 of each circuit board 200 The mounting areas 220 may be disposed to be engaged with each other to be dried. As a result, more circuit boards 100 can be obtained from the mother circuit board 260, and productivity can be greatly improved.

Display panel

Example 3

3 is a perspective view illustrating a display panel according to a third exemplary embodiment of the present invention. 6 is an enlarged plan view of the pixel portion of FIG. 3.

5 and 6, the display panel 800 according to the third embodiment of the present invention includes a first substrate 300, a second substrate 400, a liquid crystal layer 500, a circuit board 600, and the like. Flexible circuit boards 700.                     

The first substrate 300 has a plate shape, and has a first face 302, a second face 304 facing the first face 302, and a first face 302 and a second face 304. ) Sides 306 that connect).

The first substrate 300 includes pixel units 310 and signal lines 320.

The pixel units 310 are disposed on the first surface 302 of the first substrate 300, and a plurality of pixel units 310 are disposed in a matrix form. Each pixel unit 310 includes a thin film transistor (TFT) 312, which is a switching element, and a pixel electrode 314 including a transparent conductive material connected to the thin film transistor 312.

Each TFT 312 includes a source electrode S, a gate electrode G, a drain electrode D, and a channel layer C. An insulating film (not shown) is disposed on the top surface of the gate electrode G, and a channel layer C is disposed on the top surface of the insulating film so as to overlap the gate electrode G. The channel layer C includes amorphous silicon whose electrical characteristics are changed from the conductor to the non-conductor to the conductor by the voltage applied to the gate electrode G. Source and drain electrodes S and D are respectively disposed on the top surface of the channel layer C. The source electrode S and the drain electrode D include aluminum or an aluminum alloy. The pixel electrode 314 is disposed on the top surface of the insulating layer and is electrically connected to the drain electrode D.

The signal lines 320 include first signal lines 322 and second signal lines 324. Each first signal line 322 is electrically connected to the source electrodes S of the TFTs 312 arranged in the same column, and extends to the edge of the first surface 302 of the first substrate 300 in the first direction. It extends and is electrically connected with the 1st pad part 322p. The first signal lines 222 are grouped into a predetermined number, for example, 256, to form the first channel portion 222c.

Each second signal line 324 is electrically connected to the gate electrodes G of the TFTs 312 arranged in the same row, and is formed on the first substrate 300 in a second direction perpendicular to the first direction. It extends to the edge of the first surface 302 and is electrically connected to the second pad portion 324p. The second signal lines 324 are grouped into a predetermined number, for example 256, to form the second channel portion 324c on the first surface 302.

The second substrate 400 is disposed to face the first substrate 300. The second substrate 400 includes RGB color pixels (not shown) and a common electrode (not shown) formed by a thin film process.

The RGB color pixels respectively filter white light generated by an external light source (not shown) to generate monochromatic light having a predetermined wavelength, for example, wavelengths of red, green, and blue. The common electrode includes a transparent conductive material and is formed over the entire surface of the second substrate 400.

The liquid crystal layer 500 is interposed between the first substrate 300 and the second substrate 400, and the liquid crystal layer 500 includes the pixel electrode 314 and the second substrate 400 of the first substrate 300. The arrangement is changed by the electric field formed between the common electrodes, thereby changing the transmittance of the light passing through the liquid crystal layer 500.

The circuit board 600 providing a driving signal to the first substrate 300 includes a first circuit board 100 and a second circuit board 200.

The first circuit board 100 is disposed to face the side surface 306 of the first substrate 300 in the first direction, and includes the first body 110, the first mounting regions 120, and the first signal pattern. 130 and first depressions 140.

The first body 110 according to the present embodiment has a plate shape having an L shape, and a plurality of first mounting regions 120 are formed along one side of the first body 110.

A plurality of first signal patterns 130 are formed on one surface of the first body 110 to provide a driving signal to each of the first mounting regions 120. Each of the first signal patterns 130 according to the present exemplary embodiment includes a first signal line 132 and a first output pad 134 electrically connected to the first signal line 132. The first signal lines 132 receive the driving signal from the first driving circuit 136 generating the driving signal and transmit the driving signal to the first output pads 134.

A plurality of first recesses 140 may be formed by removing a portion of the first body 110 from a region where the first mounting regions 120 are not formed among one side of the first body 110. There is no first signal pattern 130 in the portion of the first body 210 removed to form the first recesses 140.

The second circuit board 200 is disposed to face the side surface 306 of the first substrate 300 in the second direction, and includes the second body 210, the second mounting regions 220, and the second signal pattern. 230 and second depressions 240.

The second body 210 according to the present embodiment has a plate shape having a rectangular parallelepiped shape, and a plurality of second mounting regions 220 are formed along one side of the second body 210.

A plurality of second signal patterns 230 are formed on one surface of the second body 210 to provide a driving signal to each of the second mounting regions 220. Each second signal pattern 230 according to the present exemplary embodiment includes a second signal line 232 and a second output pad 234 electrically connected to the second signal line 232. The second signal lines 232 receive the driving signal from the second driving circuit 236 that generates the driving signal and transmit the driving signal to the second output pads 234.

A plurality of second recesses 240 may be formed by removing a portion of the second body 210 from a region where the second mounting regions 220 are not formed on one side of the second body 210. There is no second signal pattern 230 in the portion of the second body 210 removed to form the second recess 240.

The flexible printed circuit boards 700 electrically connecting the circuit board 600 and the first substrate 300 include first flexible printed circuit boards 710 and second flexible printed circuit boards 720.

The first flexible printed circuit boards 710 electrically connect the first mounting regions 120 of the first circuit board 100 and the first pad part 322p of the first substrate 300. Each of the first flexible printed circuit boards 710 may include, for example, first input terminals 712, first output terminals 714, first conductive lines 716, and a first driving IC 718. Include.

The first output pads 134 formed in each of the first mounting regions 120 are electrically connected to the first input terminals 712 of the first flexible printed circuit board 710 through an anisotropic conductive film (ACF). Each first input terminal 712 is electrically connected to the first driving IC 718 by the first conductive lines 716, and the first driving IC 718 is connected to the first conductive lines 716 by the first conductive lines 716. The first output terminals 134 are electrically connected to each other. The first output terminals 714 are electrically connected to the first pad portions 222p of the first substrate 300 through an anisotropic conductive film (ACF).

The second flexible circuit boards 720 electrically connect the second mounting regions 220 of the second circuit board 200 and the second pad portion 324p of the first substrate 300. Each second flexible printed circuit board 720 may include, for example, second input terminals 722, second output terminals 724, second conductive lines 726, and a second driving IC 728. It includes.

The second output pads 234 formed in each of the second mounting regions 220 are electrically connected to the second input terminals 722 of the second flexible printed circuit board 720 through the anisotropic conductive film (ACF). Each second input terminal 722 is electrically connected to the second driving IC 728 by the second conductive lines 726, and the second driving IC 728 is connected by the second conductive lines 726. It is electrically connected to the second output terminals 724. The first output terminals 724 are electrically connected to the second pad portions 324p of the first substrate 300 via an anisotropic conductive film (ACF).

Display

Example  4

7 is a cross-sectional view illustrating a display device according to a fourth exemplary embodiment of the present invention. Since the display panel according to the fourth embodiment of the present invention has the same configuration as the display panel of the third embodiment described above, duplicate description thereof will be omitted, and the same reference numerals and names will be used for the same components. .

Referring to FIG. 7, the display device 1000 according to an exemplary embodiment of the present invention includes a display panel 800, a storage container 850, and a light source 900.

The storage container 850 accommodates the display panel 800, and the light source 900 is accommodated in the storage container 850 to provide light to the display panel 800.

In addition, the display device 1000 may further include an optical sheet 950 and a reflecting plate 960. The optical sheets 950 are interposed between the display panel 800 and the light source 900 to change the optical characteristics of the light incident from the light source 900 to be emitted to the display panel 800. The reflector 960 may supply light that is not incident on the display panel 800 among the light generated from the light source 900 to the display panel 800 to improve light utilization efficiency.

As described above, the shape of the circuit board 600 may be improved to greatly improve the productivity of the display panel 800, thereby reducing the manufacturing cost of the display apparatus 1000.

As described above, when the at least two circuit boards are formed on the mother circuit board, the mounting portions of the circuit boards are interlocked with each other, and the substrates can be obtained from the mother circuit board, thereby improving productivity. Accordingly, manufacturing costs of the display panel and the display device can be reduced.

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 (9)

A body having a plate shape; A plurality of mounting regions formed along one side of the body; A plurality of signal patterns formed on one surface of the body to provide a driving signal to the mounting regions; And And a plurality of recesses formed by removing a portion of the body in an area other than the mounting regions of one side of the body. The circuit board of claim 1, wherein the recesses have a rectangular shape or a trapezoidal shape. The circuit board of claim 1, wherein the recesses are formed to have a uniform shape. The circuit board of claim 1, wherein the recesses have the same shape as the mounting regions. The circuit board of claim 1, wherein the mounting regions are equal in number to the recesses. The circuit board of claim 1, wherein the mounting regions further include flexible circuit boards electrically connected to the signal patterns to transmit the driving signal. A first substrate including a plurality of signal lines extending to an end of the first substrate to display an image, and channel portions spaced at predetermined intervals by grouping the signal lines in a predetermined number; A second substrate facing the first substrate; A liquid crystal layer interposed between the first substrate and the second substrate; A body having a plate formation, a plurality of mounting regions formed along one side of the body, a plurality of signal patterns formed on one surface of the body to provide a driving signal to the mounting regions, and the mounting region of one side of the body A circuit board including a plurality of recesses formed by removing a part of the body in an area other than the ones; And And flexible circuit boards electrically connecting the mounting regions and the channel portion. The display panel of claim 7, wherein the mounting parts and the channel parts face each other. A first substrate including a plurality of signal lines extending to an end of the first substrate to display an image and channel portions spaced at predetermined intervals by grouping the signal lines in a predetermined number; A second substrate disposed to face the first substrate, A liquid crystal layer interposed between the first substrate and the second substrate, A body having a plate shape, a plurality of mounting regions formed along one side of the body, a plurality of signal patterns formed on one surface of the body to provide a drive signal to the mounting regions and the mounting region of one side of the body A circuit board including a plurality of recesses formed by removing a portion of the body in an area other than the ones; A display panel comprising flexible circuit boards electrically connecting the mounting regions and the channel portion; A storage container accommodating the display panel; And And a light source housed in the storage container to provide light toward the display panel.

Images