Abstract:
A display device comprises a control circuit board generating a first control signal; a driver chip package connected to the control circuit board and receiving the first control signal; and a display panel connected to the driver chip package interconnecting the control circuit board and the display panel. The display panel comprises pixels formed and signal lines connected to the pixels. The driver chip package comprises a wire film and a driver chip attached over the wire film. The driver chip is fixed to the display panel to transfer the second control signal to at least one of the plurality of signal lines. The wire film interconnects the driver chip and the control circuit board to transfer the first control signal from the control circuit board to the driver chip.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority to and the benefit of Korean Patent Application No. 10-2015-0049842 filed in the Korean Intellectual Property Office on Apr. 8, 2015, the entire contents of which are incorporated herein by reference. 
       BACKGROUND 
       [0002]    (a) Technical field 
         [0003]    The present disclosure relates to a display device, and more particularly, to flat panel display. 
         [0004]    (b) Discussion of the Related Technology 
         [0005]    Generally, a flat panel display includes a substrate over which an array of pixels is formed to display an image, and a display driver chip of the display device which generates a control signal such as an image signal to transfer the control signal to the pixel. 
         [0006]    The display driver chip receives a source signal from a control circuit board, generates the control signal based on the source signal and outputs the control signal to the pixel side through the output terminal toward the pixels. 
         [0007]    The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. 
       SUMMARY 
       [0008]    One aspect of the present invention provides a display device having advantages of simplifying a layout of display driver chips and improving a higher resolution. 
         [0009]    Another aspect of the invention provides a display device, which may comprise: a control circuit board configured to generate at least one control signal comprising a first control signal; a driver chip package connected to the control circuit board and configured to receive the first control signal from the control circuit board; and a display panel connected to the driver chip package which interconnects the control circuit board and the display panel, the display panel comprising a display area and a peripheral area surrounding the display area, the display panel comprising a plurality of pixels formed in the display area and a plurality of signal lines formed in the peripheral area and connected to the plurality of pixels, wherein the driver chip package comprises a wire film and a driver chip attached over the wire film, the driver chip comprising a first surface facing the display panel and a second surface facing the wire film and configured to generate a second control signal based on the first control signal, wherein the driver chip is fixed to the display panel to transfer the second control signal to at least one of the plurality of signal lines, wherein the wire film interconnects the driver chip and the control circuit board to transfer the first control signal from the control circuit board to the driver chip. 
         [0010]    In the foregoing device, the driver chip may comprise: a first operation unit configured to generate the second control signal and comprising an input terminal for receiving the first control signal and an output terminal for transmitting the second control signal, at least a first chip pad connected to the output terminal of the first operation unit and formed on the first surface of the driver chip, and at least a second chip pad connected to the input terminal of the first operation unit and formed on the second surface of the driver chip, and wherein the plurality of signal lines of the display panel comprises a plurality of data lines, each of which comprises one end connected to one of the pixels, and a terminal pad formed at the other end and connected to the first chip pad. The wire film may comprise: a wire film body formed by a flexible film, and a plurality of signal lines formed over a surface of the wire film body and each comprising a first connection pad and a second connection pad, wherein the first connection pad and the second connection pad are connected to the second chip pad and a terminal pad of the control circuit board, respectively. The wire film may further comprise an insulating layer covering the signal lines. A bump may be formed between the first chip pad and the first connection pad of the signal line of the wire film. A bump may be formed between the second chip pad and the terminal pad of the signal line of the display panel. 
         [0011]    Still in the foregoing device, a through silicon via may be formed between the first operation unit and at least one of the first and second chip pads. The display panel may further comprise an auxiliary circuit formed in the peripheral area and connected to the plurality of pixels and an auxiliary circuit signal line interconnecting the auxiliary circuit and the driver chip package, wherein the control circuit board is configured to generate a third control signal and configured to transfer the third control signal to the driver chip package, and wherein the driver chip package is configured to generate a fourth control signal base on the third control signal and configured to transfer the fourth control signal to the auxiliary circuit signal line. The driver chip may further comprise: a second operation unit configured to generate the fourth control signal based on the third control signal, at least a third chip pad formed on the first surface of the driver chip and configured to transfer the fourth control signal to the auxiliary circuit signal line, and at least a fourth chip pad formed on the second surface of the driver chip and configured to transfer the third control signal to the second operation unit, and wherein the auxiliary circuit signal line includes a plurality of auxiliary circuit data lines, each of which comprises one end connected to the auxiliary circuit, and another terminal pad connected to the third pad. 
         [0012]    Yet in the foregoing device, the driver chip may comprise: a fifth chip pad formed on the first surface of the driver chip to be connected to the display panel, a sixth chip pad formed on the second surface of the driver chip to be connected to the wire film, and a conductor filler passing through the driver chip and interconnecting the fifth chip pad and the sixth pad, and wherein the control circuit board is configured to generate a fifth control signal, and the sixth chip pad, the conductor filler and the fifth chip pad are configured to transfer the fifth control signal the display panel. The device may further comprise an auxiliary wire film which connects the control circuit board and the display panel and is configured to directly transfer a sixth control signal generated from the control circuit board to the display panel. The display device may be configured to transfer the sixth control signal from the control circuit board to the display panel without passing the driver chip package. The auxiliary wire film may comprise one end fixed to the display panel and located between an edge of the display panel and the driver chip. The display area may comprise a first sub display area formed at a part of the display area and a second sub display area formed at another part except for the part formed with the first sub display area, and wherein an additional driver chip package is provided, the driver chip package is connected to a plurality of pixels formed in the first sub display area through the signal lines, and the additional chip package is connected to the pixels formed in the second sub display area through the signal lines. The auxiliary wire film may overlap the wire film. 
         [0013]    Further in the foregoing device, the driver chip may be electrically connected to the control circuit board via the wire film. The driver chip does not directly contact the control circuit board. The display panel may be electrically connected to the control circuit board via the driver chip package. The display panel does not directly contact the control circuit board. The driver chip may be sandwiched between the display panel and the wire film. 
         [0014]    An embodiment of the present invention provides a display device including: a control substrate generating at least one control signal; a driver chip package of which one side is connected to the control substrate and to which a first control signal generated from the control substrate is input; and a display substrate connected to the other side of the driver chip package, formed with a display area and a peripheral area surrounding the display area, and including a plurality of pixels formed in the display area and signal lines formed in the peripheral area and connected to the plurality of pixels, in which the driver chip package includes a driver chip which has a first surface and a second surface facing the first surface in an opposite direction and generates a second control signal based on the first control signal and of which the first surface is fixed to the display substrate to transfer the second control signal to the signal line, and a wire film of which one side is connected to the second surface of the driver chip and the other side is connected to the control substrate to transfer the first control signal from the control substrate to the driver chip. 
         [0015]    The driver chip may include a first operation unit which generates the second control signal and includes an input terminal to which the first control signal is input and an output terminal to which the second control signal is output, a plurality of first pads which is connected to the output terminal of the first operation unit and formed on the first surface of the driver chip, and a plurality of second pads which is connected to the input terminal of the first operation unit and formed on the second surface of the driver chip, and the plurality of signal lines may include a plurality of data lines which is formed on the display substrate and of which one end is connected to the pixel, and a pad at the signal line side which is formed at the other end of the data line and to which the first pad is connected. 
         [0016]    The wire film may include a wire film body formed by a flexible film and a signal line at the wire film side including a first pad at the wire film side and a second pad at the wire film side which are formed on one surface of the wire film body and spaced apart from one side and the other side based on the center of the wire film body, and the first pad at the wire film side and the second pad at the wire film side may be connected to the second pad of the driver chip and the pad at the control substrate side formed on the control substrate. 
         [0017]    The wire film may further include an insulating layer at the wire film side covering one surface of the signal line at the wire film side except for the first pad at the wire film side and the second pad at the wire film side. 
         [0018]    Bumps may be formed between the first pad and the pad at the signal line side and between the second pad and the first pad at the wire film side. 
         [0019]    At least one of the connected between the first pad and the first operation unit and the connection between the second pad and the second operation unit may be formed by a through silicon via. 
         [0020]    The display substrate may further include an auxiliary circuit formed in the peripheral area and connected to the pixel and an auxiliary circuit signal line of which one end is connected to the auxiliary circuit and the other end is connected to the driver chip package, the control substrate may generate a third control signal to transfer the third control signal to the driver chip package, and the driver chip package may generate a fourth control signal base on the third control signal to transfer the fourth control signal to the auxiliary circuit signal line. 
         [0021]    The driver chip may include a second operation unit for generating the fourth control signal based on the third control signal, a plurality of third pads which is formed on the first surface of the driver chip and transfers the fourth control signal to the auxiliary circuit signal line, and a plurality of the fourth pads which is formed on the second surface of the driver chip and transfers the third control signal to the second operation unit, and the auxiliary circuit signal line may include a plurality of auxiliary circuit data lines which is formed on the display substrate and of which one end is connected to the auxiliary circuit, and a pad at the auxiliary circuit signal line side which is formed at the other end of the auxiliary circuit data line and connected to the third pad. 
         [0022]    The driver chip may include a fifth pad which is formed on the first surface of the driver chip to be connected to the display substrate, a sixth pad formed on the second surface of the driver chip to be connected to the wire film, and a conductor filler which passes through the driver chip and of which one end is connected to the fifth pad and the other end is connected to the sixth pad, and the control substrate may generate a fifth control signal, and the fifth control signal may be transferred to the display substrate through the sixth pad, the conductor filler, and the fifth pad. 
         [0023]    The display device may further include an auxiliary wire film which connects the control substrate and the display substrate and directly transfers a sixth control signal generated from the control substrate to the display substrate. 
         [0024]    A position of a connection pad of the display substrate to which one side of the auxiliary wire film is connected may be more adjacent to an edge side of the display substrate than a position of a connection pad of the display substrate to which one side of the driver chip package is connected, and a position of the connection pad of the control substrate to which the other side of the auxiliary wire film is connected may be more adjacent to an edge side of the control substrate than a position of the connection pad of the control substrate to which the other side of the driver chip package is connected. 
         [0025]    The display area may include a first sub display area formed at a part of the display area and a second sub display area formed at another part except for the part formed with the first sub display area, and a plurality of driver chip packages is provided, one among the driver chip packages may be connected to a pixel formed in the first sub display area through the signal line, and other driver chip packages except for one driver chip package may be connected to a pixel formed in the second sub display area through the signal line. 
         [0026]    As described above, in the display device according to the embodiment of the present invention, a larger amount of data may be transceived from a control substrate by forming connection pads on both a first surface and a second surface of the driver chip. As a result, it is possible to improve a higher resolution in the display device. 
         [0027]    Further, it is possible to increase manufacturing efficiency of the display device as the layout of the driver chips is simplified. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0028]      FIG. 1  is a diagram illustrating the display device according to an embodiment of the present invention. 
           [0029]      FIG. 2  is a side view of the display device of  FIG. 1 . 
           [0030]      FIG. 3  is an enlarged diagram of a part III of  FIG. 2 . 
           [0031]      FIG. 4  is a diagram illustrating a lower surface of a driver chip of  FIG. 3 . 
           [0032]      FIG. 5  is a diagram illustrating an upper surface of the driver chip of  FIG. 3 . 
           [0033]      FIG. 6  is a diagram illustrating a wire film of  FIG. 3 . 
           [0034]      FIG. 7  is a diagram illustrating a control circuit board of  FIG. 3 . 
           [0035]      FIG. 8  is a diagram illustrating a display device according to another embodiment of the present invention. 
           [0036]      FIG. 9  is a schematic plan view of a display device according to yet another embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
       [0037]    Embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification. In addition, the size and thickness of each configuration shown in the drawings are arbitrarily shown for understanding and ease of description, but the present invention is not limited thereto. 
         [0038]    Further, in the specification, the word “on” means positioning on or below the object portion, but does not essentially mean positioning on the upper side of the object portion based on a gravity direction. In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising”, will be understood to imply the inclusion of stated elements but not the exclusion of any other elements. 
         [0039]    Generally, the display driver chip is provided in a chip-on-glass (COG) form of which one side is fixed to a substrate side or in a chip-on-film (COF) form in which one side is fixed to a film wire. 
         [0040]    A plurality of input terminals and a plurality of output terminals are formed on one surface of the display driver chip, and the display driver chip receives a source signal for generating the control signal from a control circuit board through the input terminal. In addition, the display driver chip generates the control signal based on the source signal and outputs the control signal to the pixel side through the output terminal. 
         [0041]    With development of an image processing technique, the demand of a high-resolution display device is increased, and a bandwidth of image signal data which are input and output to the display driver chip is also increased. 
         [0042]    According to the increase of the data bandwidth, a layout of display driver chips becomes more complicated. Thus, the structure of the display panel is complicated and manufacturing cost is increased. 
         [0043]    Further, in the case of implementing a high resolution in a small substrate, there is a limitation to a layout area of the display driver chip and thus it is difficult to implement the high-resolution display. 
         [0044]    Hereinafter, a display device according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. 
         [0045]      FIG. 1  is a diagram illustrating the display device according to an embodiment of the present invention, and  FIG. 2  is a side view of the display device of  FIG. 1 .  FIG. 3  is an enlarged diagram of a part III of  FIG. 2 ,  FIG. 4  is a diagram illustrating a lower surface of a driver chip of  FIG. 3 , and  FIG. 5  is a diagram illustrating an upper surface of the driver chip of  FIG. 3 .  FIG. 6  is a diagram illustrating a wire film of  FIG. 3 , and  FIG. 7  is a diagram illustrating a control circuit board of  FIG. 3 . 
         [0046]    Referring to  FIGS. 1 to 7 , a display device  1  according to the embodiment as a device displaying an image may be, for example, a liquid crystal display (LCD) or an organic light emitting diode display (OLED Display). 
         [0047]    The display device  1  includes a display substrate or display panel  100  displaying an image, a control substrate or control circuit board  300  generating a plurality of control signals for displaying the image, and a driver chip package  200  connecting the display panel  100  and the control circuit board  300 . 
         [0048]    The display panel  100  is formed as a planar panel, and includes a display area  110 , and a peripheral area  120 . The display panel includes an array of pixels, a plurality of signal lines  130 , an auxiliary circuit  140 , and an auxiliary circuit signal line  150 . 
         [0049]    In more detail, in the display area  110 , a plurality of pixels is formed to display the image and positioned at the center of the display panel  100 . 
         [0050]    The peripheral area  120  surrounds the display area  110  and forms an edge of the display panel  100 . In addition, in the peripheral area  120 , the signal line  130 , the auxiliary circuit  140 , and the auxiliary circuit signal line  150  are formed. 
         [0051]    The plurality of signal lines  130  is formed at a lower side of the display area  110 . Each signal line  130  includes a data line  131  which is formed on the display panel  100  and of which one end is connected to the pixel, and a pad  132  at the signal line side formed at the other end of the data line  131 . 
         [0052]    The auxiliary circuit  140  may be formed at both sides of the display area  110  and is connected to the pixel formed in the display area  110 . The auxiliary circuit  140  exemplarily generates a scan signal and an emission control signal to transfer the signals to the pixel of the display area  110 . 
         [0053]    The auxiliary circuit signal line  150  includes an auxiliary circuit data line  151  which is formed on the display substrate and of which one end is connected to the auxiliary circuit  140 , and a pad  152  at the auxiliary circuit signal line side  152  formed at the other end of the auxiliary circuit data line  151 . 
         [0054]    Meanwhile, the driver chip package  200  receives the control signal generated in the control circuit board  300  and generates a new control signal based on the control signal to transfer the new control signal to the display panel  100  or transfer the control signal generated in the control circuit board  300  to the display panel  100  again. 
         [0055]    The driver chip package  200  includes a driver chip  210 , a wire film or a flexible wire board  220 , and a sealing resin  280 . 
         [0056]    In more detail, the driver chip  210  as a semiconductor chip has a first surface  210   a  and a second surface  210   b  facing away from the first surface  210   a.  The chip  210  includes a first operation unit  217 , a second operation unit  218 , and a conductor filler  219  which are formed inside a chip, a first pad  211 , a third pad  213 , and a fifth pad  215  which are formed on the first surface  210   a  of the driver chip  210 , and a second pad  212 , a fourth pad  214 , and a sixth pad  216  formed on the second surface  210   b  of the driver chip  210 . 
         [0057]    The first operation unit  217  generates a second control signal S 2  based on a first control signal S 1  generated in the control circuit board  300 . The first operation unit  217  has an input terminal and an output terminal, the output terminal of the first operation unit  217  is connected to the first pad  211 , and the input terminal of the first operation unit  217  is connected to the second pad  212 . 
         [0058]    The second operation unit  218  generates a fourth control signal S 4  based on a third control signal S 3  generated in the control circuit board  300 . The second operation unit  218  has an input terminal and an output terminal, the output terminal of the second operation unit  218  is connected to the third pad  213 , and the input terminal of the second operation unit  218  is connected to the fourth pad  214 , like the first operation unit  217 . 
         [0059]    The conductor filler  219  may be formed in a shape passing through an inner portion of the driver chip  210 , the fifth pad  215  is connected to one end of the conductor filler  219 , and the sixth pad  216  is connected to the other end of the conductor filler  219 . 
         [0060]    In embodiments, in the driver chip  210  of the display device  100  according to the embodiment of the present invention, a plurality of pads which may be connected to other configurations on both the first surface  210   a  which is a lower surface and the second substrate  210   b  which is an upper surface is formed. 
         [0061]    The driver chip  210  of the display device  100  according to the embodiment may be, for example, a flip chip or a semiconductor chip which is formed by a through silicon via (hereinafter, referred to as a TSV) process or a wafer level package process. 
         [0062]    For example, connection between the first pad  211  and the first operation unit  217  of the driver chip  210  according to the embodiment or connection between the second pad  212  and the first operation unit  217  may be formed by the TSV. 
         [0063]    The first pad  211  of the driver chip  210  is connected to the pad  132  at the signal line side of the signal line  130 , and the third pad  213  is connected to the pad  152  at the auxiliary circuit signal line side of the auxiliary circuit signal line  150 . 
         [0064]    The fifth pad  215  may be connected to a pad at the power signal line side formed at an end of a power signal line. The power signal line is connected to the auxiliary circuit  140  of the display area  110  to transfer to the auxiliary circuit  140  a control signal having a voltage having a predetermined magnitude or more. 
         [0065]    Hereinafter, a configuration of the wire film  220  will be described in detail. 
         [0066]    The driver chip  210  is connected to one side of the wire film  220  and the other side of the wire film  220  is connected to the control circuit board  300  to transfer the control signals generated in the control circuit board  300  to the driver chip  210 . 
         [0067]    The wire film  220  includes a wire film body  221 , a plurality of signal lines  222 ,  223 , and  224  at the wire film side, and an insulating layer  260  at the wire film side. 
         [0068]    The wire film body  221  is formed by, for example, a flexible film made of a polyimide material having one surface and a rear surface, and the second surface  210   b  of the driver chip  210  is fixed to one side of the wire film body  221 . 
         [0069]    The plurality of signal lines  222 ,  223 , and  224  at the wire film side is formed on one surface of the wire film body  221  and includes a signal line  222  at the first wire film side, a signal line  223  at the second wire film side, and a signal line  224  at the third wire film side. 
         [0070]    In embodiments, each of the signal lines  222 ,  223  and  224  includes an elongated conductive line and two connection pads disposed at the ends of the conductive line. The signal lines  222 ,  223  and  224  may have different length. 
         [0071]    For example, the signal line  222  at the first wire film side includes a first pad  222   a  at the first wire film signal line side and a second pad  222   b  at the first wire film signal line side which are spaced apart from one side and the other side of the wire film body  221  based on the center of the wire film body  221 , and a data line  222   c  at the first wire film signal line side connecting the first pad  222   a  at the first wire film signal line side and the second pad  222   b  at the first wire film signal line side. The first pad  222   a  at the first wire film signal line side is connected to the second pad  212  of the driver chip  210 . 
         [0072]    The signal line  223  at the second wire film signal line side includes a first pad  223   a  at the second wire film signal line side, a second pad  223   b  at the second wire film signal line side, and a data line  223   c  at the second wire film signal line side, and the signal line  224  at the third wire film signal line side includes a first pad  224   a  at the third wire film signal line side, a second pad  224   b  at the third wire film signal line side, and a data line  224   c  at the third wire film signal line side. 
         [0073]    The first pad  223   a  at the second wire film signal line side is connected to the fourth pad  214  of the driver chip  210 , and the first pad  224   a  at the third wire film signal line side is connected to the sixth pad  216  of the driver chip  210 . 
         [0074]    Since the configuration of the signal line  223  at the second wire film side and the signal line  224  at the third wire film side is substantially the same as the configuration of the signal line  222  at the first wire film side, the detailed description thereof will be omitted. 
         [0075]    A bump  250  is provided between the pads of the display panel  100  and the first pad  211 , the third pad  213 , and the fifth pad  215  of the driver chip  210  to firmly connect the pads to each other. 
         [0076]    Similarly, a bump  250  is provided between the second pad  212 , the fourth pad  214 , and the sixth pad  216  of the driver chip  210  and the pads  222   a,    223   a,  and  224   a  of the wire film  220 . 
         [0077]    In addition, an insulating layer  260  at the wire film side is formed at the remaining area of one surface of the wire film body  211  except for the plurality of pads  222   a,    222   b,    223   a,    223   b,    224   a,  and  224   b  at the wire film side to be prevented from being soldered in an undesired region during a soldering process. 
         [0078]    The sealing resin  280  is coated on one side of the wire film body  211  to firmly fix the driver chip  210  to one side of the wire film body  211 . 
         [0079]    Hereinafter, a configuration of the control circuit board  300  will be described in detail. 
         [0080]    The control circuit board  300  includes a control circuit board body  310  having a plate shape which is for example, a printed circuit board, and a plurality of pads  321 ,  322 , and  323  at the control circuit board side disposed at the one side of the control circuit board body  310 . 
         [0081]    The plurality of pads  321 ,  322 , and  323  at the control circuit board side includes a first pad  321  at the control circuit board side, a second pad  322  at the control circuit board side, and a third pad  323  at the control circuit board side. 
         [0082]    The first pad  321  at the control circuit board side, the second pad  322  at the control circuit board side, and the third pad  323  at the control circuit board side are connected to the second pad  222   a  at the first wire film signal line side, the second pad  223   a  at the second wire film signal line side, and the second pad  224   a  at the third wire film signal line side of the wire film  220 , respectively. 
         [0083]    Between the pads  321 ,  322 , and  323  at the control circuit board side and the second pads  222   a,    223   a,  and  224   a  at the wire film signal line side, solders ball or bumps may be provided. 
         [0084]    Hereinafter, a process of transferring the control signals generated in the control circuit board  300  to the display panel  100  will be described. 
         [0085]    The first control signal S 1 , the third control signal S 3 , and the fifth control signal S 5  are generated in the control circuit board  300 . 
         [0086]    First, the first control signal S 1  is output from the first pad  321  at the control circuit board side of the control circuit board  300  to be input to the first operation unit  217  of the driver chip  210  through the signal line  222  at the first wire film side. 
         [0087]    The first operation unit  217  generates the second control signal S 2  based on the first control signal S 1 , and the second control signal S 2  is output to the first pad  211  of the driver chip  210 . 
         [0088]    The second control signal S 2  output from the first pad  211  of the driver chip  210  is input to the pixel of the display area  110  through the signal line  130 . 
         [0089]    The third control signal S 3  is output from the second pad  322  at the control circuit board side of the control circuit board  300  to be input to the second operation unit  218  of the driver chip  210  through the signal line  223  at the second wire film side. 
         [0090]    The second operation unit  218  generates the fourth control signal S 4  based on the third control signal S 3 , and the fourth control signal S 4  is output to the third pad  213  of the driver chip  210 . 
         [0091]    The fourth control signal S 4  output from the third pad  213  of the driver chip  210  is input the auxiliary circuit  140  formed in the peripheral area  120  through the signal line  150  at the auxiliary circuit side. 
         [0092]    The fifth control signal S 5  is output from the third pad  323  at the control circuit board side of the control circuit board  300  to be output to the fifth pad  215  through the signal line  224  at the third wire film side and the conductor filler  219  of the driver chip  210 . 
         [0093]    The fifth control signal S 5  output from the fifth pad  215  of the driver chip  210  is input to the auxiliary circuit  140  through the power signal line. 
         [0094]    The first control signal S 1  and the second control signal S 2  of the display device  1  according to the embodiment may be image signals, and the third control signal S 3  and the fourth control signal S 4  may be auxiliary circuit driving signals. Further, the fifth control signal S 5  may be a power signal having a higher voltage value than the first control signal S 1  to the fourth control signal S 4 . 
         [0095]    According to the proposed embodiment, the connection pads are formed on both the first surface  210   a  and the second surface  210   b  of the driver chip  210  to transceive a larger amount of data from the control circuit board  300 . As a result, it is possible to improve a higher resolution in the display device  1 . 
         [0096]    Further, it is possible to increase manufacturing efficiency of the display device  1  as the layout of the driver chip  210  is simplified. 
         [0097]    Further, heat generated inside the driver chip  210  is emitted to the outside through the signal lines made of a conductor material which are connected to the first surface  210   a  and the second surface  210   b  of the driver chip  210  and thus heat dispersion of the driver chip  210  may be more easily performed. 
         [0098]      FIG. 8  is a diagram illustrating a display device according to another embodiment of the present invention. 
         [0099]    In a display device according to the embodiment, since configurations of a display area, a driver chip package, and a signal line are different from the configurations of  FIGS. 1 to 7  and other configurations are substantially the same as the configurations of  FIGS. 1 to 7 , hereinafter, discriminative features of the embodiment will be mainly described. 
         [0100]    Referring to  FIG. 8 , the display device  1  according to the embodiment includes a display area  110  including a first sub display area  111  and a second sub display area  112  in which a plurality of pixels is formed, a first driver chip package  410 , a second driver chip package  420 , a first signal line  181 , and a second signal line  182 . 
         [0101]    The first sub display area  111  is formed at a part of the display area  110 , and the second sub display area  112  is formed at another part except for the part where the first sub display area  111  is formed. 
         [0102]    The first driver chip package  410  is connected to the pixel formed in the first sub display area  111  through the first signal line  181  to transfer a control signal to the pixel. 
         [0103]    Similarly, the second driver chip package  420  is connected to the pixel formed in the second sub display area  112  through the second signal line  182  to transfer a control signal to the pixel. 
         [0104]    In the embodiment, it is described that the sub display areas are two, but a configuration in which the sub display areas are three or more may be also included in the spirit of the present invention. 
         [0105]      FIG. 9  is a schematic plan view of a display device according to yet another embodiment of the present invention. 
         [0106]    In a display device according to the embodiment, since a configuration having an auxiliary wire film is different from the configuration of  FIGS. 1 to 7  and other configurations are substantially the same as the configurations of  FIGS. 1 to 7 , hereinafter, discriminative features of the embodiment will be mainly described. 
         [0107]    Referring to  FIG. 9 , the display device  1  according to the embodiment includes an auxiliary wire film  700 . 
         [0108]    The auxiliary wire film  700  directly connects the control circuit board  300  and the display panel  100 , and a sixth control signal S 6  generated from the control circuit board  300  is directly transferred to the display panel  100 . 
         [0109]    The auxiliary wire film  700  includes, for example, a flexible auxiliary wire film body  710  made of a polyimide material and a plurality of signal lines at the auxiliary wire film side formed on one surface of the auxiliary wire film body  710 . 
         [0110]    One side of the auxiliary wire film body  710  is connected to the peripheral area  120  of the display panel  100  and the other side of the auxiliary wire film body  710  is connected to the control circuit board  300 . 
         [0111]    In the peripheral area  120  of the display panel  100 , a connection pad  190  at the display substrate side to which one side of the signal line at the auxiliary wire film side is connected, and on the control circuit board  300 , a connection pad  340  at the control circuit board side to which the other side of the signal line at the auxiliary wire film side is connected. 
         [0112]    The connection pad  190  at the display substrate side is positioned to be more adjacent to the edge side of the display panel  100  than the pads  132  and  152  at the signal line side to which the driver chip  120  is connected. 
         [0113]    In addition, the connection pad  340  at the control circuit board side is positioned to be more adjacent to the edge side of the control circuit board  300  than the pad  320  at the control circuit board side to which the other side of the wire film  220  of the driver chip package  200  is connected. 
         [0114]    Accordingly, while the wire film  700  is connected to the display panel  100  and the control circuit board  300 , the wire film  700  is positioned to be separated by a predetermined distance at the lower side of the driver chip package  200  to prevent interference between the driver chip package  200  and the wire film  700 . 
         [0115]    In this case, the driver chip  210  of the driver chip package  200  may include a separation part  290  for increasing a height of the upper surface of the driver chip  210  in order to more suppress the interference between the driver chip package  200  and the wire film  700 . 
         [0116]    The separation part  290  is positioned at an upper side of the driver chip  210  and may be, for example, a bump, a solder ball, or an insulating layer which has a predetermined height. 
         [0117]    While embodiments of this invention are described, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.