KR102078773B1 - Display panel and electric device comprising the display panel - Google Patents

Abstract

A display panel according to an exemplary embodiment of the present invention includes a display unit for receiving a driving signal to display an image, and first and second input pad units for receiving the driving signal from an external device and providing the driving signal to the display unit. The input pad unit includes a plurality of upper pads arranged in a first row, and the second input pad unit includes a plurality of lower pads arranged in a second row, and the reference upper panel disposed at the center of the upper and lower pads. And the lower pads are disposed in parallel with a reference line defined in a column direction crossing the row direction perpendicularly, and the upper pads except for the reference upper pads are disposed to have a predetermined slope with respect to the reference line, and the lower pads correspond to each other. The pads are disposed at the same angle as the pads.

Description

DISPLAY PANEL AND ELECTRIC DEVICE COMPRISING THE DISPLAY PANEL}

The present invention relates to a display panel and an electronic device including the same, and more particularly, to a display panel for improving bonding reliability and an electronic device including the same.

Background Art Generally, electro-optical devices mounted on electronic devices such as mobile phones, notebook computer devices, television receivers, and the like include electro-optical panels such as liquid crystal display panels, and flexible wiring boards mounted on the electro-optical panels.

When a drive circuit for driving an electro-optical panel is provided on the panel side, the flexible wiring board supplies display data and control signals to the electro-optical panel. When the drive circuit is not provided on the electro-optical panel side, the drive circuit is mounted on the flexible wiring board or on a separate circuit board to which the flexible wiring board is connected. In this case, the flexible wiring board supplies the drive signal output by the drive circuit to the electro-optical panel.

The electro-optical panel includes a plurality of input pads in the input pad part for electrically coupling with the flexible wiring board, and a plurality of output pads corresponding to the plurality of input pads in the output pad part of the flexible wiring board.

In order to perform the bonding process of mounting the flexible wiring board on the electro-optical panel, a process of aligning the input pads of the electro-optical panel with the output pads of the flexible wiring board is required. However, due to a difference in elongation between the electro-optical panel and the flexible wiring board due to temperature change or humidity, it is difficult to match between the input pad and the output pad, resulting in poor bonding.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display panel capable of improving bonding reliability with a flexible wiring board.

Another object of the present invention is to provide an electronic device including a display panel and a flexible wiring board, which can improve bonding reliability thereof.

According to an aspect of the present invention, a display panel includes a display unit for receiving a driving signal to display an image, first and second input pad units for receiving the driving signal from the outside and providing the driving signal to the display unit. The first input pad part includes a plurality of upper pads arranged in a first row, and the second input pad part includes a plurality of lower pads arranged in a second row and disposed at the center of the upper and lower pads. The reference upper and lower pads are arranged in parallel with a reference line defined by a column direction crossing perpendicular to the row direction, and the upper pads except the reference upper pads are disposed to have a predetermined slope with respect to the reference line. The paddles are placed at the same angle as the corresponding image pads.

The electronic device according to the present invention for achieving the above object is mounted on the first pad portion, the second electronic component mounted on the first electronic component in an electronic device having first and second electronic components electrically connected to each other. A second pad portion, wherein the first and second pad portions include first and second input pad portions, respectively, and the first input pad portion includes a plurality of image pads arranged in a first row, The second input pad unit includes a plurality of lower pads arranged in a second row, wherein the reference upper and lower pads disposed at the center of the upper and lower pads are defined in a column direction perpendicular to the row direction. And the upper pads except for the reference upper pad are disposed to have a predetermined slope with respect to the reference line, and the lower pads are disposed at the same angle as the corresponding upper pads.

According to an embodiment of the present disclosure, the driving reliability of the display panel and the electronic device including the same may be improved.

1 and 2 are plan views illustrating a bonding process of a display panel and a flexible wiring board in an electro-optical device according to an exemplary embodiment of the present invention.
3 is a plan view illustrating a pad shape provided on a display panel according to an exemplary embodiment of the present invention.
4 is a plan view illustrating a pad shape provided on a display panel according to another exemplary embodiment of the present disclosure.
5 is a flowchart illustrating an alignment process between a display panel and a flexible wiring board according to an exemplary embodiment of the present invention.
6A is a plan view illustrating a primary alignment state of a display panel and a flexible wiring board according to an exemplary embodiment of the present disclosure.
6B is a plan view illustrating a y-axis corrected state of the display panel and the flexible wiring board.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structures are shown in an enlarged scale than actual for clarity of the invention. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts or combinations thereof. In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where another part is "directly" but also another part in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is "below" another part, this includes not only the other part "below" but also another part in the middle.

1 and 2 are plan views illustrating a bonding process of a display panel and a flexible wiring board in an electro-optical device according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the electro-optical device 100 includes an electro-optical panel 110 and a flexible wiring board 120 attached to the electro-optical panel 110. In an exemplary embodiment, the electro-optical panel 110 may be a display panel displaying a desired image by applying a driving signal to an electro-optic material provided therein. According to the type of electro-optic material described above, the electro-optical panel 110 (hereinafter, referred to as a display panel) may be a liquid crystal display panel, an organic light emitting display panel, or an electrowetting display. The display panel may be implemented as an electrifying display panel.

The display panel 110 includes a display area DA including a plurality of pixels PX, a black matrix area BA surrounding the display area DA, and a mounting area MA to which the flexible wiring board 120 is attached. ).

The display area DA is an area in which the pixels PX are arranged in a matrix form, and may be an area in which an image is substantially displayed. Each pixel may include first to third sub-pixels R, G, and B for implementing red, green, and blue colors, respectively.

The black matrix area BA is an area where a black matrix (not shown) is formed to block light. In an embodiment, a gate driving circuit (not shown) for supplying a gate signal to the pixels PX may be provided in the black matrix area BA.

The mounting area MA includes first and second input pad parts IPD1 and IPD2 for receiving a signal supplied from the flexible wiring board 120.

In an embodiment, the first input pad part IPD1 includes a plurality of pads extending in the first row direction on the mounting area MA. The second input pad part IPD2 includes a plurality of pads extending in the second row direction on the mounting area MA. That is, the first and second input pad parts IPD1 and IPD2 may be arranged as rows of two stages on the mounting area MA of the display panel 110.

In exemplary embodiments, the first input pad part IPD1 extending in the first row direction may be disposed in the mounting area adjacent to the display area DA. The second input pad part IPD2 extending in the second row direction may be disposed at an end of the mounting area MA that is farther from the first input pad part IPD1.

Also, in an embodiment, the data driving circuit 125 for supplying a data signal to the pixels PX may be included in the form of a chip on the flexible wiring board 120. In this case, the first and second input pad parts IPD1 and IPD2 include data pads electrically connected to data lines for supplying a data signal to the pixels PX. In addition, the first and second input pad units IPD1 and IPD2 may include control signal pads electrically connected to the control signal lines. The control signal lines may be wiring lines for supplying a control signal for driving the display panel 110 supplied from the flexible wiring board 120 to the display panel 110.

Although not illustrated in FIG. 1, a data driving circuit for supplying a data signal to the pixels PX is not included on the flexible wiring board 120. It may be included as. In this case, the first and second input pad parts IPD1 and IPD2 may be pads for supplying a data control signal and a control signal to the data driving circuit.

The flexible wiring board 120 includes first and second output pad parts OPD1 and OPD2 electrically connected to the first and second input pad parts IPD1 and IPD2 in a one-to-one correspondence. In detail, the rear surfaces of the first and second output pad portions OPD1 and OPD2 (that is, the surfaces facing the display panel 110) correspond one-to-one to the front surfaces of the first and second input pad portions IPD1 and IPD2. It can be attached and electrically connected. In addition, in the exemplary embodiment, the chip on film structure in which the data driving circuit 125 is included in the flexible wiring board 120 in the form of a chip is illustrated.

Referring to FIG. 2, the flexible wiring board 120 is attached to the mounting area MA of the display panel 110. To this end, a conductive adhesive film 130 may be interposed between the flexible wiring board 120 and the display panel 110. In an embodiment, an anisotropic conductive film (ACF) may be used for the conductive adhesive film 130.

In detail, the first and second input pad parts IPD1 and IPD2 of the display panel 110 and the first and second output pad parts OPD1 and OPD2 of the flexible wiring board 120 are arranged to face each other. In this case, the anisotropic conductive film 130 is interposed between the flexible wiring board 120 and the display panel 110. Thereafter, heat and pressure are applied to the mounting area MA of the display panel 110 by a tool. Accordingly, the first and second input pad parts IPD1 and IPD2 are electrically connected to correspond to the first and second output pad parts OPD1 and OPD2 in a one-to-one correspondence. That is, the flexible wiring board 120 is attached to a portion of the display panel 110.

Each of the display panel 110 and the flexible wiring board 120 may be oriented by a temperature change for the thermocompression bonding process. However, the ratio at which the display panel 110 and the flexible wiring board 120 are stretched at the same temperature may be made of different materials. In this case, mis-alignment may occur between the first and second input pad parts IPD1 and IPD2 and the first and second output pads OPD1 and OPD2. Accordingly, a process for realigning the misaligned first and second input pad parts IPD1 and IPD2 and the first and second output pad parts OPD1 and OPD2 is required.

3 is a plan view illustrating shapes of first and second input pad units provided on a display panel according to an exemplary embodiment of the present invention.

As described above with reference to FIGS. 1 and 2, the first and second input pad parts IPD1 and IPD2 provided on the display panel 110 and the first and second provided on the flexible wiring board 120. The output pad parts OPD1 and OPD2 are provided in a structure corresponding to each other. Therefore, in FIG. 3, structures of the first and second input pad parts IPD1 and IPD2 provided on the mounting area MA of the display panel 110 will be described. Therefore, the description of the structure of the first and second output pad parts OPD1 and OPD2 provided on the flexible wiring board 120 will be omitted.

In addition, in the description of the present invention, the reference pads and the first to sixth input pads are illustrated as examples on the mounting area MA of the display panel 110, but the present invention is not limited thereto. That is, a plurality of input pads may be disposed on the display panel 110. In addition, a plurality of center lines VL may be included on the display panel 110, and input pads having the same shape may be disposed for each center line VL. However, for convenience of description, in the following drawings, it is described that one center line VL is disposed.

Referring to FIG. 3, the reference pad VP is provided on the mounting area MA with respect to the center line VL. In addition, the first to third input pads P1, P2, and P3 are provided on the left side with respect to the center line VL, and the fourth to sixth input pads P4, P5, and P6 are provided on the right side. .

In detail, the reference pad VP is disposed on the mounting area MA with respect to the center line VL. In detail, the reference pad VP includes a reference upper pad VP and a reference lower pad VPb. The reference upper and lower pads VPa and VPb may be disposed in parallel with the center line VL defined by the column direction crossing perpendicular to the row direction. In addition, the first to third input pads P1, P2, and P3 are disposed on the mounting area MA on the left side of the reference pad VP.

The first input pad P1 includes a first upper pad P1a and a first lower pad P1b disposed along the first reference line L1. The second input pad P2 includes a second upper pad P2a and a second lower pad P2b disposed along the second reference line L2. The third input pad P3 includes a third upper pad P3a and a third lower pad P3b disposed along the third reference line L3. The first to third phase pads P1a, P2a and P3a may be included in the first input pad part IPD1 disposed in the first row direction with respect to the left side of the center line VL. The first to third lower pads P1b, P2b, and P3b may be included in the second input pad part IPD2 disposed in the second row direction with respect to the left side of the center line VL.

In an embodiment, the angle formed by the reference axis RX parallel to the center line VL and the first reference line L1 is the same as 'θ1a' for both the first upper pad P1a and the first lower pad P1b. Can be implemented. That is, the first upper pad P1a and the first lower pad P1b may have the same slope with respect to the center line VL and may be disposed in the mounting area MA.

In an embodiment, the angle formed between the reference axis RX and the second reference line L2 parallel to the center line VL is the same as 'θ2a' for both the second upper pad P2a and the second lower pad P2b. Can be implemented. That is, the second upper pad P2a and the second lower pad P2b may have the same slope with respect to the center line VL and may be disposed in the mounting area MA.

In an embodiment, the angle formed by the reference axis RX parallel to the center line VL and the third reference line L3 is the same as 'θ3a' for both the third upper pad P3a and the third lower pad P3b. Can be implemented. That is, the third upper pad P3a and the third lower pad P3b may have the same slope with respect to the center line VL and may be disposed in the mounting area MA.

In addition, in an embodiment, the angle formed by the reference axis RX parallel to the center line VL and the first to third reference lines L1, L2, and L3 is the third input at the first input pad P1. It may become larger toward the pad P3. For example, the input pads may be manufactured such that 'θ3a' has an angle greater than 'θ2a' and 'θ2a' has an angle greater than 'θ1a'.

The fourth to sixth input pads P4, P5, and P6 have a structure corresponding to the first to third input pads P1, P2, and P3 based on the center line VL and are disposed on the mounting area MA. Is placed on.

The fourth input pad P4 includes a fourth upper pad P4a and a fourth lower pad P4b disposed along the fourth reference line L4. The fifth input pad LP5 includes a fifth upper pad P5a and a fifth lower pad P5b disposed along the fifth reference line L5. The sixth input pad P6 includes a sixth upper pad P6a and a sixth lower pad P6b disposed along the sixth reference line L6. The fourth to sixth phase pads P4a, P5a, and P6a may be included in the first input pad part IPD1 disposed in the first row direction with respect to the right side of the center line VL. The fourth to sixth lower pads P4b, P5b, and P6b may be included in the second input pad part IPD2 disposed in the second row direction with respect to the right side of the center line VL.

In an embodiment, the angle between the reference axis RX parallel to the center line VL and the fourth reference line L4 is the same as 'θ1b' for both the fourth upper pad P4a and the fourth lower pad P4b. Can be implemented. That is, the fourth upper pad P4a and the fourth lower pad P4b may be disposed in the mounting area MA with the same slope with respect to the center line VL.

In an embodiment, the angle formed by the reference axis RX parallel to the center line VL and the fifth reference line L5 is the same as 'θ2b' for both the fifth upper pad P5a and the fifth lower pad P5b. Can be implemented. That is, the fifth upper pad P5a and the fifth lower pad P5b may have the same slope with respect to the center line VL and may be disposed in the mounting area MA.

In an embodiment, the angle formed by the reference axis RX parallel to the center line VL and the sixth reference line L6 is the same as 'θ3b' for both the sixth upper pad P6a and the sixth lower pad P6b. Can be implemented. That is, the sixth upper pad P6a and the sixth lower pad P6b may have the same slope with respect to the center line VL and may be disposed in the mounting area MA.

In addition, in an embodiment, the angle formed by the reference axis RX parallel to the center line VL and the fourth to sixth reference lines L4, L5, and L6 is the sixth input on the fourth input pad P4. It may become larger toward the pad P6. For example, the input pads may be manufactured such that 'θ3b' has an angle greater than 'θ2b' and 'θ2b' has an angle greater than 'θ1b'.

Each pad included in the mounting area MA may be connected to each sub pixel included in the display area DA in a one-to-one correspondence through electrical wiring. That is, based on an increase in the number of pads included in the mounting area MA, the number of sub-pixels included in the display area DA may also increase.

That is, compared to the pad structure of the display panel arranged in the row direction of the first stage, the display panel 110 according to the present invention may be disposed in the mounting area MA in the row direction of the second stage. As a result, based on an increase in the number of pads included in the mounting area MA, the number of sub-pixels included in the display area DA may also increase.

In addition, in the embodiment, each of the first to sixth input pads P1, P2, P3, P4, P5, and P6 included in the mounting area MA may have parallelograms extending in parallel according to corresponding reference lines. It may have a shape. In this case, the first reference line L1 and the fourth reference line L4 have a structure corresponding to each other and converge at the first point P1. The second reference line L2 and the fifth reference line L5 have a structure corresponding to each other and converge at the second point P2. The third reference line L3 and the sixth reference line L6 have a structure corresponding to each other and converge at the third point P3. In the description of the present invention, a position where each reference line converges has been described, but the present invention is not limited thereto. That is, the position where each reference line converges may be located outside the center line VL.

As described above, the first to sixth input pads P1, P2, P3, P4, P5, and P6 disposed on the display panel 110 according to the present invention include upper and lower pads, respectively. In particular, as two row directions, the upper and lower pads included in each input pad are manufactured to have the same slope with respect to the center line VL. Therefore, when correcting an error generated during the alignment process between the flexible wiring board 120 and the display panel 110, if only one of the upper and lower pads is corrected, the remaining pads may be corrected in the same manner.

4 is a plan view illustrating a pad shape provided on a display panel according to another exemplary embodiment of the present disclosure.

The first to sixth input pads illustrated in FIG. 4 may be implemented in the same manner as the structures of the first to sixth input pads illustrated in FIG. 3. Therefore, description of the first to sixth input pads is omitted. 4, the structure of the first and second input pad portions IPD1 and IPD2 provided on the mounting area MA of the display panel 110 (see FIG. 1) will be described. A description of the structure of the first and second output pad parts OPD1 and OPD2 provided on the flexible wiring board 120 will be omitted.

In addition, in the description of the present invention, it is assumed that the first to sixth pads are data pads that transfer data voltages to sub-pixels included in the display area DA. The seventh to tenth pads are assumed to be control signal pads for transmitting a control signal for driving the display area DA.

In general, in order to transfer the data voltage to each sub-pixel included in the display area DA, one data pad for transferring the data voltage provided from the data driving circuit to the sub-pixel is required. That is, the data voltages transmitted to the subpixels are different for each pad in the first row and second row directions disposed on the mounting area MA. Therefore, separate electrical wirings connected to the sub-pixels are required for each pad.

However, the mounting area MA may include a plurality of pads that transmit the same signal among the signals transmitted to the display panel 110. For example, a control signal necessary for driving the display panel 110, such as a power control signal or a clock signal, may be transmitted to the display panel 110 through the plurality of pads. Therefore, when the upper and lower pads are formed as one pad through the electrical film, the same signal may be applied to the display panel 110. As a result, the volume of the pad included in the mounting area MA can be reduced.

Referring to FIG. 4, the seventh and eighth input pads P7 and P8 are provided on the left side of the mounting area MA with respect to the center line VL, and the ninth and tenth input pads P9 on the right side of the mounting area MA. , P10) is provided.

The seventh input pad P7 includes a seventh upper pad P7a and a seventh lower pad P7b disposed along the seventh reference line L7. The angle formed by the reference axis RX parallel to the center line VL and the seventh reference line L7 may be equally implemented as 'θ4a' in both the seventh upper pad P7a and the seventh lower pad P7b. That is, the seventh upper pad P7a and the seventh lower pad P7b may have the same slope with respect to the center line VL and may be disposed in the mounting area MA.

In example embodiments, the seventh upper pad P7a and the seventh lower pad P7b may be electrically connected to each other through the first electrode film P7c. Therefore, the first control signal provided from the flexible wiring board 120 may be supplied to the display panel 110 through the seventh upper pad P7a and the seventh lower pad P7b. In addition, the inclination of the first electrode film P7c based on the center line VL may also be implemented in the same manner as the seventh upper pad P7a and the seventh lower pad P7b.

The eighth input pad P8 includes an eighth upper pad P8a and an eighth lower pad P8b disposed along the eighth reference line L8. The angle formed by the reference axis RX parallel to the center line VL and the eighth reference line L8 may be equally implemented as 'θ5a' in both the eighth upper pad P8a and the eighth lower pad P8b. That is, the eighth upper pad P8a and the eighth lower pad P8b may be disposed in the mounting area MA with the same slope with respect to the center line VL.

In an embodiment, the eighth upper pad P8a and the eighth lower pad P8b may be electrically connected to each other through the second electrode film P8c. Accordingly, the second control signal provided from the flexible wiring board 120 may be supplied to the display panel 110 through the eighth upper pad P8a and the eighth lower pad P8b. In addition, the inclination of the second electrode film P8c based on the center line VL may be implemented in the same manner as the eighth upper pad P8a and the eighth lower pad P8b.

The ninth input pad P9 includes a ninth upper pad P9a and a ninth lower pad P9b disposed along the ninth reference line L9. An angle formed between the reference axis RX parallel to the center line VL and the ninth reference line L9 may be equally implemented as 'θ4b' in both the ninth upper pad P9a and the ninth lower pad P9b. In addition, the seventh and ninth input pads P7 and P9 may be implemented to correspond to each other based on the center line. That is, the seventh reference line L7 and the ninth reference line L9 have a structure corresponding to each other and converge at the fourth point P4.

In example embodiments, the ninth upper pad P9a and the ninth lower pad P9b may be electrically connected to each other through the third electrode film P9c. Therefore, the third control signal provided from the flexible wiring board 120 may be supplied to the display panel 110 through the ninth upper pad P9a and the ninth lower pad P9b. In addition, the inclination of the third electrode film P9c based on the center line VL may also be implemented in the same manner as the ninth upper pad P9a and the ninth lower pad P9b.

The tenth input pad P10 includes a tenth upper pad P10a and a tenth lower pad P10b disposed along the tenth reference line L10. An angle formed between the reference axis RX parallel to the center line VL and the tenth reference line L10 may be equally implemented as 'θ5b' in both the tenth upper pad P10a and the tenth lower pad P10b. In addition, the eighth and tenth input pads P8 and P10 may be implemented to correspond to each other based on the center line. That is, the ninth reference line L8 and the tenth reference line L10 have a structure corresponding to each other and converge at the fifth point P5.

In example embodiments, the tenth upper pad P10a and the tenth lower pad P10b may be electrically connected to each other through the third electrode film P10c. Therefore, the fourth control signal provided from the flexible wiring board 120 may be supplied to the display panel 110 through the tenth upper pad P10a and the tenth lower pad P10b.

As described above, a control signal required for driving the display panel 110 is applied to the upper and lower pads electrically connected to each other through the electrode film and transmitted to the display panel 110.

In addition, the angle formed by the reference axis RX parallel to the center line VL and the seventh and eighth reference lines L7 and L8 is toward the eighth input pad P7 toward the eighth input pad P8. Can be large. For example, the input pads may be manufactured such that 'θ5a' has an angle greater than 'θ4a'. In addition, the input pads may be manufactured such that 'θ5b' has an angle greater than 'θ4b'.

5 is a flowchart illustrating an alignment process between a display panel and a flexible wiring board according to an exemplary embodiment of the present invention.

1 and 5, the display panel 110 and the flexible wiring board 120 are disposed to face each other in the mounting area MA to be primarily aligned (S110). In example embodiments, the alignment marks (not shown) may be used to align the input pads of the display panel 110 with the output pads of the flexible wiring board 120 to correspond to each other. Although not illustrated, at least two alignment marks may be provided on the display panel 110 and the flexible wiring board 120, respectively.

Thereafter, the first x-axis displacement value D1 of the display panel 110 and the second x-axis displacement value D2 of the flexible wiring board 120 are measured (S120). For example, the distance between two alignment marks provided on the display panel 110 may be measured and calculated as the first x-axis displacement value D1, and the two alignments provided on the flexible wiring board 120 may be used. The distance between the marks may be measured and calculated as the second x-axis displacement value D2.

The first x-axis displacement value D1 and the second x-axis displacement value D2 are compared to determine whether the first x-axis displacement value D1 and the second x-axis displacement value D2 are different from each other (S130). ). First, when the first x-axis displacement value D1 and the second x-axis displacement value D2 are the same as each other, the bonding process is immediately performed without determining a mismatch (S140). However, if the first x-axis displacement value D1 and the second x-axis displacement value D2 are different from each other, it is determined as a mismatch and a y-axis correction value is calculated (S150). However, the process of calculating the y-axis correction value is performed when the deviation between the first x-axis displacement value D1 and the second x-axis displacement value D2 is within an allowable error range.

The y-axis correction value may be calculated by Equation 1 below.

Here, y is a y-axis correction value, x is a deviation between the first x-axis displacement value (D1) and the second x-axis displacement value (D2), θ is the angle between the extracted sampling pad and the reference axis (RX) It can be defined as.

When the y-axis correction value is calculated by Equation 5, y-axis correction is performed by moving one of the display panel 110 and the flexible wiring board 120 in the up / down direction along the center line RL (S160). ). When the display panel 110 and the flexible wiring board 120 are secondly aligned by performing y-axis correction, the display panel 110 and the flexible wiring board 120 that are secondly aligned are bonded to each other (S140).

Under the technical spirit of the present invention, a method of performing correction on the y axis may be variously implemented.

6A is a plan view illustrating a primary alignment state of a display panel and a flexible wiring board according to an exemplary embodiment of the present invention, and FIG. 6B is a plan view illustrating a y-axis corrected state of the display panel and a flexible wiring board.

Referring to FIG. 6A, the display panel 110 and the flexible wiring board 120 are primarily aligned such that input pads and output pads face each other. After the display panel 110 and the flexible wiring board 120 are primarily aligned, the input pads of the display panel 110 and the output pads of the flexible wiring board 120 may be mismatched within a tolerance range. This may occur due to different elongations of the display panel 110 and the flexible wiring board 120.

In this case, the y-axis correction value may be calculated according to the mismatched degree, and the positions of the display panel 110 and the flexible wiring board 120 may be corrected with the y-axis based on the calculated y-axis correction value.

As shown in FIG. 7B, if the flexible wiring board 120 is y-axis corrected in the direction of the arrow, mismatched input pads and output pads may be exactly matched.

As described above, the electro-optical device according to the present invention includes first and second input pad parts included in the display panel and first and second output pad parts included in the flexible wiring board. Particularly, in the alignment process between the display panel and the flexible wiring board, when one of the first and second input pad portions is aligned with the corresponding output pad portion, the remaining input pad portion and the corresponding output pad portion may be aligned. The alignment process can also be matched. Therefore, the driving reliability of the electro-optical device can be improved, and the time required for the alignment process of the pads can be reduced.

As described above, the embodiments are disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the meaning or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: electro-optical device
110: electro-optical panel
120: flexible wiring board
125: data driving circuit
130: anisotropic conductive film

Claims (10)

A display unit for receiving a driving signal and displaying an image; And
A first input pad section including a plurality of image pads arranged in a first row; And
A second input pad unit including a plurality of lower pads arranged in a second row and having the same number as the upper pads;
The upper pads,
A reference phase pad disposed in parallel with a centerline defined in a column direction perpendicular to the row direction;
A plurality of first phase pads each having a different slope with respect to the center line and disposed at a left side with respect to the reference phase pad; And
Each of the plurality of second phase pads having a different slope with respect to the center line and disposed on the right side with respect to the reference phase pad,
The lower pads,
A reference lower pad parallel to the center line and facing the reference upper pad in the column direction;
A plurality of first lower pads disposed on the left side of the reference lower pad and having the same slope as the first upper pads, respectively, with respect to the center line; And
A plurality of second lower pads disposed on the right side of the reference lower pad and having the same slope as the second upper pads, respectively, based on the center line;
The first pads are disposed on a first reference line having a first slope with respect to the center line, and a second pad disposed on a second reference line having a second slope different from the first slope with respect to the center line. Including a pad,
The first lower pads include a third pad corresponding to the first pad and disposed on the first reference line, and a fourth pad corresponding to the second pad and disposed on the second reference line,
And the first reference line intersects a first point of the center line, and the second reference line intersects a second point of the center line different from the first point. The method of claim 1,
The second pads disposed on a third reference line having a third slope with respect to the center line and a sixth pad disposed on a fourth reference line having a fourth slope different from the third slope with respect to the center line; Including a pad,
The second lower pads may include a seventh pad corresponding to the fifth pad and disposed on the third reference line, and an eighth pad corresponding to the seventh pad and disposed on the fourth reference line. The method of claim 2,
And the third reference line and the fourth reference line cross different points of the center line. The method of claim 3, wherein
And the third reference line intersects the first point and the fourth reference line intersects the second point. The method of claim 2,
An electrode film part disposed on the same layer as the first input pad part and the second input pad part, and disposed between the first input pad part and the second input pad part;
And a first electrode film of the electrode film portion disposed between the first pad and the third pad, and a second electrode film disposed between the fifth pad and the seventh pad. The method of claim 5, wherein
The first electrode film is disposed on the first reference line, and the second electrode film is disposed on the third reference line. The method of claim 1,
The display unit is a display panel in which a plurality of pixels for displaying the image is arranged in a matrix form. The method of claim 7, wherein
Each of the plurality of pixels includes sub-pixels for implementing red, green, and blue colors, and each sub-pixel is connected in a one-to-one correspondence with one pad included in the first and second input pad units. . The method of claim 1,
Each of the first and second phase pads,
A plurality of first data pads transmitting the driving signal based on a data voltage displaying an image of the display unit; And
And a plurality of first control signal pads for transmitting the driving signal based on a control signal required for driving the display unit. The method of claim 9,
The first and second lower pads,
A plurality of second data pads transferring the driving signal based on the data voltage displaying an image of the display unit; And
And a plurality of third control signal pads for transmitting the driving signal based on the control signal required for driving the display unit.

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