KR101883890B1 - Display device - Google Patents

Abstract

The present invention provides a display device having a circular display portion and a thin bezel width, and a display device according to the present invention includes a substrate having a circular arc portion and a drive circuit connection portion projecting from one side of the circular arc portion; A circular display portion formed on the arc portion of the substrate; A driving power supply line formed on the substrate along the periphery of the circular display unit and connected to the driving circuit connection unit; And a cathode power supply line formed on the substrate between the circular display portion and the driving power supply line along the periphery of the circular display portion and connected to the driving circuit connection portion.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device, and more particularly, to a display device having a circular display portion.

2. Description of the Related Art Generally, a display device includes a mobile communication terminal, an electronic notebook, an electronic book, a portable multimedia player (PMP), a navigation device, an UMPC (Ultra Mobile PC), a mobile phone, a smart phone, a tablet PC, mobile phones, and the like, as well as display screens of various products such as televisions, notebooks, and monitors.

Among display devices, a liquid crystal display device, an organic light emitting display device, and an electrophoretic display device can be made thin, and research and development for realizing them in a flexible display device is under way.

A flexible display device using an organic light emitting diode displays a desired image by controlling a current flowing from a pixel power supply line to an organic light emitting diode according to a data signal. The flexible display device using the organic light emitting device has a rectangular display portion in plan view due to the arrangement structure of the signal wiring, the arrangement structure of the pixel driving power wiring, and the arrangement structure of the driving circuit.

In recent years, the appearance and design of a display device have been emphasized, and consumers are increasingly interested in wearable devices such as watch phones. Research and development of a display device having a circular display portion instead of a rectangular shape is underway.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device having a circular display portion and a thin bezel width.

According to an aspect of the present invention, there is provided a display device including: a substrate having a circular arc portion and a drive circuit connection portion projecting from one side of the circular arc portion; A circular display portion formed on the arc portion of the substrate; A driving power supply line formed on the substrate along the periphery of the circular display unit and connected to the driving circuit connection unit; And a cathode power supply line formed on the substrate between the circular display portion and the driving power supply line along the periphery of the circular display portion and connected to the driving circuit connection portion.

According to the solution of the above-mentioned problems, the display device according to the present invention has the following advantages.

First, it can have a thin bezel width while having a circular display.

Second, deterioration in picture quality due to voltage drop variation in each driving power supply line position can be improved.

Third, degradation of the reliability of pixels due to moisture penetration can be improved.

Fourth, signal interference between the pixel driving power supply and the data signal can be prevented.

In addition to the effects of the present invention mentioned above, other effects of the present invention will be described below, or may be apparent to those skilled in the art from the description and the description.

1 is a plan view schematically illustrating a display device according to an embodiment of the present invention.
2 is a plan view for explaining the substrate and the circular display portion shown in Fig.
3 is a circuit diagram of a pixel formed in the circular display portion shown in Fig.
4 is a sectional view taken along the line I-I 'shown in Fig.
5 is a view for explaining a connection structure between the driving power supply line and the pixel shown in FIG.
6 is an enlarged view of a portion A shown in Fig.
FIG. 7 is a view for explaining a modified example of the driving power supply line shown in FIG. 1. FIG.
FIG. 8 is a view for explaining another modification of the driving power supply line shown in FIG. 1. FIG.
FIG. 9 is a view for explaining a modification of the display device of the present invention shown in FIGS. 1 to 8. FIG.

The meaning of the terms described herein should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms. It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof. It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one. The term "on" means not only when a configuration is formed directly on top of another configuration, but also when a third configuration is interposed between these configurations.

Hereinafter, preferred embodiments of the display device according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 is a plan view for explaining a substrate and a circular display portion shown in FIG. 1, and FIG. 3 is a cross-sectional view of a circular display portion shown in FIG. 1 FIG. 4 is a cross-sectional view taken along the line I-I 'shown in FIG. 1. FIG.

1 to 4, a display device according to an exemplary embodiment of the present invention includes a substrate 110, a circular display portion 120, a driving circuit portion 130, a driving power supply line 150, and a cathode power supply line 160).

The substrate 110 includes an arcuate portion 111 and a driving circuit connection portion 113, and may be formed of a flexible substrate, for example, a plastic substrate.

The circular arc portion 111 is formed in an arc shape by first and second circular points CP1 and CP2 having the same first radius r1 with respect to the center of the circular display portion 120, The two circular principal points CP1 and CP2 are formed in a linear shape.

The driving circuit connection part 113 is protruded (or extended) to have a constant size from one side of the circular arc part 111 defined between the first and second circular points CP1 and CP2. The driving circuit connection part 113 is formed with a driving circuit part 130 connected to the circular display part 120, various link lines, and a driving pad part 113a. The driving circuit connection portion 113 is connected to a display driver (not shown) of the display device through the driving pad portion 113a. The driving pad unit 113a includes a plurality of data pads supplied with image data for displaying an image on the circular display unit 120 from the display driving unit, a plurality of power supply pads supplied with power for driving the pixels P, And a plurality of control signal pads to which control signals are supplied.

The substrate 110 may further include a touch circuit connection unit 115.

The touch circuit connection unit 115 connects the other side of the circular arc portion 111 defined between the third and fourth circular points CP3 and CP4 having the same first radius r1 with respect to the center of the circular display portion 120, (Or extended) so as to have a certain size. A touch driving line of a touch panel (not shown) disposed on the circular display unit 120, a routing line connected to the touch sensing line, and a touch pad unit 115a are formed in the touch circuit connection unit 115. The touch circuit connection unit 115 is connected to a touch driver (not shown) of the display device through the touch pad unit 115a. The touch pad unit 115a may include a plurality of driving line pads connected to the touch driving line and a plurality of sensing line pads connected to the touch sensing line.

As such, the substrate 110 may be attached on the supporting substrate 100. That is, the supporting substrate 100 is formed in the same shape as the substrate 110, and the substrate 110 made of a flexible material is maintained in a planar state. Here, when the substrate 100 is made of a non-flexible material, it is preferable that the supporting substrate 100 is omitted for slimming down the display device.

The circular display portion 120 is formed in a circular shape on the arc portion 111 of the substrate 110. [ That is, the circular display unit 120 is formed in a circular shape having a second radius r2 smaller than the first radius r1 with respect to the center. The circular portion 120 and the circular portion 120 are formed in a substantially concentric shape so that the present invention can be applied to a bezel width of a display device defined between an outer wall of the substrate 110 and the circular display portion 120 BW) can be reduced.

The circular display unit 120 includes a display area made up of a plurality of pixels P and a circular non-display area surrounding the display area.

The display region includes a plurality of scan lines SL having a predetermined spacing, a plurality of data lines DL that intersect with the plurality of scan lines SL at regular intervals, a plurality of data lines DL that are parallel to the plurality of data lines DL, A pixel power supply line PL of a plurality of pixels P, and a plurality of pixels P.

Each of the plurality of pixels P is arranged in a display area (see FIG. 6, AA) so as to have a matrix shape. At this time, the pixels adjacent to the non-display area may be arranged in a stepped shape (see FIG. 6) according to the circumference of the circular non-display area. That is, since the circular display unit 120 is formed by arranging square pixels along the circumference of the display region, the circumference of the display region is formed substantially in the form of a step rather than a circle due to the square pixels. However, when the circular display unit 120 has a resolution higher than a certain level, the circumference of the display region is recognized as a circular shape, so that the circumference of the display region formed in a fine stepwise shape by the pixel arrangement can be seen as a circular shape. Therefore, the circular arc portion 111 and the circular display portion 120 may be seen to be substantially concentric. 6) may be formed along the circumference of the display area, and the dummy pixel may include an actual pixel P displaying an image from external static electricity, It is possible to prevent damage to the battery. At this time, the same number or more than one dummy pixel may be formed at both ends of each pixel column formed in the display region, and the number of dummy pixels formed in each pixel column may be the same or different along the circumference of the display region. Each of the plurality of pixels P may include the pixel circuit PC and the organic light emitting diode OLED.

The pixel circuit PC is connected to an adjacent scan line SL, a data line DL and a pixel power supply line PL and is connected to the pixel power supply line PL through a scan line Controls the current flowing in the organic light emitting element OLED in accordance with the data signal Vdata from the data line DL in response to the scan pulse from the line SL. The pixel circuit PC according to an example may include a switching transistor Tsw, a driving transistor Tdr, and a capacitor Cst.

The switching transistor Tsw is switched according to a scan pulse supplied to the scan line SL and supplies the data signal Vdata to the data line DL to the drive transistor Tdr. The driving transistor Tdr is switched according to a data signal Vdata supplied from the switching transistor Tsw to control a data current flowing from the pixel power supply line PL to the organic light emitting diode OLED. The capacitor Cst is connected between the gate terminal and the source terminal of the driving transistor Tdr to store a voltage corresponding to the data signal Vdata supplied to the gate terminal of the driving transistor Tdr, (Tdr).

The organic light emitting diode OLED may include an anode electrode (or a pixel electrode) connected to a source terminal of the driving transistor Tdr, an organic light emitting layer formed on the anode electrode, and a cathode electrode layer CE formed on the light emitting layer. have. The organic light emitting diode OLED emits light by a data current supplied from the driving transistor Tdr to display a predetermined image.

The driving circuit unit 130 according to the first example drives a plurality of pixels formed in the circular display unit 120 using the video data, the control signal, and the driving voltage supplied from the display driving unit through the driving pad unit 113a, And displays a predetermined image on the display unit 120. [ The driving circuit unit 130 according to the first example is formed of an integrated circuit and is mounted in a chip mounting area provided in the driving circuit connecting unit 113. The driving circuit unit 130 includes a plurality of And supplies the data signal Vdata to the plurality of data lines DL in synchronization with the supply of the scan pulse to the plurality of scan lines SL by being connected to the scan lines and the plurality of data lines. That is, the driving circuit 130 according to the first example converts the image data into the analog data signal Vdata in response to the control signal, generates a scan pulse, and supplies the generated scan pulse to the plurality of scan lines SL to the plurality of data lines DL in synchronism with the supply of the data signal Vdata. At this time, the driving circuit 130 generates pixel data for each pixel by aligning the input image data to fit the pixel arrangement structure of the circular display unit 120, and converts the generated pixel data into the data signal Vdata do.

The driving circuit unit 130 according to the second example has a plurality of data lines DL formed in the circular display unit 120 using the video data, the control signal, and the driving voltage supplied from the display driving unit through the driving pad unit 113a, And supplies the data signal Vdata. The driving circuit unit 130 according to the second example includes an integrated circuit and is mounted in a chip mounting area provided in the driving circuit connecting unit 113. The driving circuit unit 130 includes a plurality of data link lines formed between the chip mounting area and the circular display unit 120, And supplies the data signal Vdata to the plurality of data lines DL. That is, the driving circuit 130 according to the second example generates pixel data for each pixel by aligning the image data input in response to the control signal to the pixel arrangement structure of the circular display 120, Converts the data into a data signal (Vdata) and supplies it to a plurality of data lines (DL).

In the display device according to the present invention, when the display device according to the present invention includes the driving circuit unit 130 according to the second example, the display device according to the present invention includes the driving circuit 130 and the plurality of scan lines SL one to one The scan driving circuit 140 (not shown) formed on the circular arc portion 111 of the substrate 110 along the periphery of the circular display portion 120 instead of omitting a plurality of scan link lines formed in the drive circuit connection portion 113 ).

The scan driving circuit 140 is formed in an arc shape along the circumference of the circular display part 120 and is connected to a plurality of scan lines SL. The scan driving circuit 140 generates scan pulses in response to a scan control signal supplied from the display driver through the driving pad unit 113a and the scan control link lines and sequentially supplies the scan pulses to the plurality of scan lines SL do. For example, the scan driving circuit 140 may be formed around the left or right periphery of the circular display unit 120 to supply scan pulses to one end or the other end of each of the plurality of scan lines SL. As another example, the scan driving circuit 140 may be formed along the left and right circumferences of the circular display unit 120 to simultaneously supply scan pulses to one end and the other end of each of the plurality of scan lines SL. As another example, the scan driving circuit 140 may be formed along the left and right periphery of the circular display unit 120 to supply scan pulses to one end of the odd-numbered scan line SL, The scan pulse can be supplied to the other end of the scan line.

In the case where the display device according to the present invention includes the scan driving circuit 140, the present invention can reduce the size of the driving circuit connecting portion 113 according to the omission of the plurality of scan link lines, The bezel width BW of the display device can be further reduced by decreasing the length between the first and second circular points CP1 and CP2 and the arc portion 111 can be formed concentrically with the circular display portion 120 . Alternatively, instead of reducing the bezel width (BW) of the display device, the present invention provides a space for forming a data link line as much as the space occupied by a plurality of omitted scan link lines, thereby driving a plurality of data link lines more reliably It can be disposed or formed in the circuit connecting portion 113. [

The driving power supply line 150 is formed on the substrate 110 along the circumference of the circular display unit 120 so as to have a constant width and thickness and has driving pad portions 113a ) To the driving power source pad The driving power supply line 150 may include a plurality of pixel power lines PL for supplying the pixel driving power Vdd supplied from the display driver through the driving power source pad to the plurality of pixel power lines PL formed in the circular display unit 120, It plays a role.

The driving power supply line 150 according to an exemplary embodiment may be divided into a circumferential line 151 and first and second shoulder lines 153 and 155 according to positions formed on the substrate 110 .

The circumferential line 151 is formed along the periphery of the circular display portion 120 excluding the one side portion of the circular display portion 120 adjacent to the drive circuit connection portion 113. It is preferable that the circumferential line 151 is formed concentrically with at least one of the circular display portion 120 and the outer wall of the substrate 110. 4, since the driving power supply line 150 is formed at the outermost portion of the substrate 110, the driving power supply line 150 may be formed at a predetermined distance from the outer side wall 110a of the substrate 110, Distance (D1) will be spaced apart. If the circumferential line 151 is not formed concentrically with the circular display unit 120, the distance D1 between the outer wall 110a of the substrate 110 and the circumferential line 151 becomes uneven, Static electricity may flow in the circumferential line 151 located relatively close to the outer wall 110a of the substrate 110. [ Therefore, it is preferable that the circumferential line 151 is formed concentrically with the circular display unit 120, and further, it is formed concentrically with the outer wall 110a of the substrate 110. [

The first shoulder line 153 is formed to have a constant curvature between one end of the circumferential line 151 adjacent to the driving circuit connection part 113 and the first driving power supply pad of the driving pad part 113a, Is connected to the first driving power supply pad. The first shoulder line 153 is formed to have a relatively large curvature so as to surround the first pivotal point CP1 without overlapping the outermost link line formed between the driving circuit unit 130 and the circular display unit 120 do.

The second shoulder line 155 is formed to have a constant curvature between the other end of the circumferential line 151 adjacent to the driving circuit connection part 113 and the second driving power supply pad of the driving pad part 113a, Is connected to the second driving power supply pad. The second shoulder line 155 is formed with a relatively large curvature so as to surround the second circumferential point CP2 without overlapping the outermost link line formed between the driving circuit unit 130 and the circular display unit 120 do.

The driving power supply line 150 is supplied with the pixel driving power Vdd at both ends of the circumferential line 151 through the first and second shoulder lines 153 and 155, 150 can be minimized.

The cathode power supply line 160 is formed on the substrate 110 between the driving power supply line 150 and the circular display unit 120 along the circumference of the circular display unit 120 so as to have a constant width and thickness, And both ends thereof are connected to the cathode power pad of the driving pad portion 113a formed in the driving circuit connection portion 113. [ The cathode power supply line 160 according to an exemplary embodiment may have the same structure as the driving power supply line 150 and may be formed in parallel. The cathode power supply line 160 is electrically connected to a cathode electrode layer CE formed on the circular arc portion 111 so as to cover the circular display portion 120, as shown in FIG. The cathode power supply line 160 supplies the cathode power supplied from the display driver through the cathode power pad to the cathode electrode layer CE so that all of the holes formed in the circular display unit 120 through the cathode electrode layer CE So that the cathode power is supplied to the organic light emitting element OLED of the pixel P.

The cathode electrode layer CE is formed on a protective layer 117 covering the transistors of each pixel P and is electrically connected to the organic light emitting layer of the organic light emitting device OLED formed in each pixel P. [ The edge portion of the cathode electrode layer CE is directly connected to the cathode power supply line 160.

The cathode electrode layer CE is formed between the driving power supply line 150 and the circular display unit 120. The present invention can reduce the bezel width BW of the display apparatus. Specifically, since the protective layer 117 covering the transistor of each pixel P is made of an organic material that can transfer moisture, it is possible to prevent the organic light emitting diode OLED from being damaged due to moisture penetrating the protective layer 117 The protective layer 117 should be spaced apart from the outer wall 110a of the substrate 110 by a predetermined distance D2. Accordingly, the present invention provides protection by forming the cathode electrode layer CE between the driving power supply line 150 and the circular display portion 120 so as to be spaced apart from the outer wall 110a of the substrate 110 by a predetermined distance D2 Defined by the width between the outer wall 110a of the substrate 110 and the circular display 120 while the layer 117 is spaced a distance D2 from the outer wall 110a of the substrate 110, BW) can be reduced.

Meanwhile, the cathode electrode layer CE may be formed adjacent to the outer wall 110a of the substrate 110 than the driving power supply line 150. However, in this case, since the edge portion of the substrate 110 has to extend toward the outward side in order to separate the protective layer 117 from the outer wall 110a of the substrate 110 by a predetermined distance D2, There is a drawback that the width BW increases.

As a result, in order to reduce the bezel width BW of the display device and to separate the protective layer 117 from the outer wall 110a of the substrate 110 by a predetermined distance D2, And is formed between the driving power supply line 150 and the circular display unit 120.

4, the display device includes an encapsulation layer 118 formed on the substrate 110 to cover the cathode electrode layer CE, and an encapsulation layer 118 formed on the encapsulation layer 118, And a barrier substrate 119 formed on the barrier substrate 119.

The sealing layer 118 may be formed in a multi-layer structure in which an organic material layer or an inorganic material layer, an organic material layer and an inorganic material layer are alternately stacked.

The barrier substrate 119 may be made of a material having a low moisture permeability, for example, a polymer material, and may be attached to the sealing layer 118 by a transparent adhesive. A touch panel may be attached to the barrier substrate 119, and a polarizing film may be further attached to the touch panel.

In the display device according to an embodiment of the present invention, the arc portion 111 of the substrate 110 and the circular display portion 120 are formed in a concentric shape so that the bezel width BW having the circular display portion 120, Lt; / RTI > The display device according to an exemplary embodiment of the present invention may include a driving power supply line 150 along the periphery of the circular display unit 120 and a cathode power line 150 between the driving power supply line 150 and the circular display unit 120. [ The deterioration of the picture quality due to the voltage drop of the driving power supply line 150 can be improved and the reliability of the pixel P due to the moisture penetration can be prevented. ), But may have a thinner bezel width (BW).

FIG. 5 is a view for explaining a connection structure between the driving power supply line and the pixel shown in FIG. 1, and FIG. 6 is an enlarged view of a portion A shown in FIG.

5 and 6 together with FIG. 1, the supply direction of the data signal Vdata supplied to each pixel P and the supply direction of the pixel drive power supply Vdd supplied to each pixel P Can be opposite to each other. That is, the supply direction (+ Y) of the data signal (Vdata) may be a first direction (+ Y) from the one side to the other side of the circular display part 120. On the other hand, the supply direction -Y of the pixel-drive power supply Vdd is a second direction -Y opposite to the first direction + Y from the other side of the circular display portion 120 to one side . To this end, the display device according to the present invention further comprises a plurality of power sharing lines (PSL).

The plurality of power supply sharing lines PSL electrically connect each of the plurality of pixel power supply lines PL to the circumferential line 151 of the driving power supply line 150 according to an example. Each of the plurality of power sharing lines PSL extends from the circumferential line 151 so as to be parallel to the scan line between adjacent pixels P in the longitudinal direction Y of the data line DL, PL) on a one-to-one basis. At this time, each of the plurality of power sharing lines PSL is preferably formed so as not to intersect the data line DL in order to prevent signal interference between the pixel driving power supply Vdd and the data signal Vdata.

Each of the plurality of power sharing lines PSL supplies the pixel driving power Vdd supplied to the driving power supply line 150 to the lower ends of the plurality of pixel power lines PL, (Vdd) is supplied in the direction (-Y) opposite to the supply direction (+ Y) of the data signal (Vdata). Accordingly, the present invention can be applied to a liquid crystal display device having a plurality of pixels that are driven by a difference between a data signal (Vdata) variation depending on a resistance of a data line (DL) and a pixel driving power source (Vdd) The image quality degradation or the luminance unevenness can be improved.

For example, in the middle pixel of the first horizontal line (hereinafter referred to as a "first intermediate pixel") and the middle pixel of the last horizontal line (hereinafter referred to as a "first intermediate pixel" When the supply direction and the supply direction of the pixel driving power supply Vdd are equal to each other, the voltage drop of the data signal Vdata and the pixel driving power supply Vdd is relatively the same as that of the second intermediate pixel A luminance deviation occurs between the first and second intermediate pixels even if the data signal is Vdata. On the other hand, when the supply direction of the data signal Vdata is opposite to the supply direction of the pixel drive power supply Vdd, the voltage drop of the data signal Vdata is relatively larger than that of the first intermediate pixel, The voltage drop of the pixel driving power supply Vdd is relatively larger than that of the second intermediate pixel so that the deviation between the data signal Vdata and the pixel driving power supply Vdd are mutually compensated for the same data signal Vdata The luminance deviation between the first and second intermediate pixels can be minimized.

Each of the plurality of power sharing lines PSL according to another example individually connects a plurality of pixel groups PG composed of two or more pixels P to the circumferential line 151 of the driving power supply line 150 . That is, each of the plurality of power sharing lines PSL is included in each of the pixel groups PG without intersecting the data lines DL to prevent signal interference between the pixel driving power Vdd and the data signal Vdata Are formed to be shared by the two or more pixel power supply lines (PL). Each of the plurality of pixel groups PG includes two or more pixel columns each including the data line DL and the pixels P connected to the pixel power supply line PL, And may be composed of the same or different pixel columns set in advance. In addition, the pixel column included in each of the plurality of pixel groups PG may include at least one dummy pixel DP according to the curvature of the circular display unit 120. [

Each of the plurality of power supply sharing lines PSL according to another example is formed in parallel with the scan lines so as to be adjacent to the lower portion of each pixel group PG and is common to the pixel power supply lines PL included in the corresponding pixel group PG Lt; / RTI > The driving power supply line 150 and the plurality of power sharing lines PSL and the pixel power supply line PL may be formed on the same layer on the substrate 110. Each of the plurality of power sharing lines PSL according to another example supplies the pixel driving power supply Vdd supplied to the driving power supply line 150 to each pixel group PG in units of a pixel power source And supplies the pixel driving power supply Vdd in a direction -Y opposite to the supply direction + Y of the data signal Vdata. As a result, as described above, according to the present invention, the difference between the data signal (Vdata) deviation according to the resistance of the data line (DL) and the pixel driving voltage Vdd The image quality degradation or luminance unevenness due to the deviation of the image quality can be improved.

In order to supply the pixel driving power supply Vdd to the lower end portions of the pixel power supply lines PL without intersecting the data lines DL, May be formed in the lower region LA of the circular arc portion 111 along the circumference of the circular arc 120. That is, the arc part 111 of the substrate 110 includes an upper area UA defined between the center of the circular display part 120 and one side of the circular display part 120, and an upper area UA defined between the central part of the circular display part 120 and the circular display part 120. [ And a lower region LA defined between the other side of the substrate 120. The data link lines for connecting the driving circuit unit 130 to the plurality of data lines DL are connected to the upper area UA of the circular arc part 111 adjacent to the circular display part 120, And the plurality of power sharing lines PSL are formed in the lower area UA of the circular arc part 111 adjacent to the circular display part 120 to form the power sharing lines PSL, (PSLs) can be spatially separated. Accordingly, the present invention secures the formation region of the data link lines and reduces the length between the first and second circles CP1 and CP2, thereby reducing the length of the arc portion 111 of the substrate 110 to the circular display portion 120 The bezel width BW of the display device can be reduced.

FIG. 7 is a view for explaining a modified example of the driving power supply line shown in FIG. 1, which further forms a connecting line. Accordingly, the same reference numerals as those in FIG. 1 denote the same parts in FIG. 7, and a description will be omitted. In the following description, only the driving power supply line will be described.

7, the driving power supply line 150 may include a circumferential line 151, first and second shoulder lines 153 and 155, and a connection line 157.

The circumferential line 151 and the first and second shoulder lines 153 and 155 are the same as those of FIGS. 1 to 6, respectively, and thus a duplicate description thereof will be omitted.

The connection line 157 is formed on the driving circuit connection part 113 to electrically connect the first and second shoulder lines 153 and 155 so that the driving power supply line 150 is connected to the circuit To be formed in a loop shape. The connecting line 157 according to an exemplary embodiment is formed in the driving circuit forming area 113b defined on the driving circuit connecting part 113 so that the driving circuit part 130 153, and the other end is electrically connected to the second shoulder line 155. Since the connection line 157 is formed in the lower region of the driving circuit unit 130 (see FIG. 1), the data link lines can be formed without overlapping with the data link lines formed in the driving circuit connection unit 113 But it does not affect it.

In addition, the driving power supply line 150 formed in the form of a closed loop by the connection line 157 is connected to the middle portion of the connection line 157 instead of the first and second driving power pads The pixel driving power supply Vdd may be supplied from the display driving unit through one driving power supply pad. In this case, the number of driving power supply pads formed in the driving pad portion 113a can be reduced.

Therefore, the present invention minimizes the voltage drop of the pixel driving power supply Vdd by supplying the pixel driving power supply Vdd to each pixel P by using the closed loop driving power supply line 150, It is possible to minimize or prevent deterioration of image quality due to voltage drop of the power source Vdd.

FIG. 8 is a view for explaining another modification of the driving power supply line shown in FIG. 1, in which a circumferential line of the driving power supply line is formed in a closed loop form. Accordingly, the same reference numerals as those in FIG. 1 denote the same parts in FIG. 8, and a description will be given of only the driving power supply line in the following description.

8, the driving power supply line 150 may include a circumferential line 151 and first and second shoulder lines 153 and 155.

The circumferential line 151 is formed in a closed loop shape along the periphery of the circular display portion 120 excluding the one side of the circular display portion 120 adjacent to the drive circuit connection portion 113. It is preferable that the circumferential line 151 is formed concentrically with at least one of the circular display portion 120 and the outer wall of the substrate 110. The circumferential line 151 according to an example may include a first curved portion 151a, a second curved portion 151b, a first connecting portion 151c, and a second connecting portion 151d.

The first curved portion 151a is formed on the circumference of the circular display portion 120 excluding the one side of the circular display portion 120. The first curved portion 151a may be formed concentrically with at least one of the circular display portion 120 and the outer wall of the substrate 110.

The second curved portion 151b is spaced apart from the first curved portion 151a by a predetermined distance.

The first connection part 151c electrically connects one end of each of the adjacent first and second curved parts 151a and 151b. Thus, one end of each of the first and second curved portions 151a and 151b is connected to the first connection portion 151c without being tired.

The second connection portion 151d electrically connects the other ends of the first and second curved portions 151a and 151b, which are adjacent to each other. Accordingly, the other ends of the first and second curved portions 151a and 151b are connected to each other without being tired by the second connection portion 151d.

The first curved part 151a, the second curved part 151b, the first connection part 151c and the second connection part 151d may be formed on the same layer on the substrate 110. [

One end of each of the first and second curved portions 151a and 151b is connected to the first connection portion 151c and the other end of each of the first and second curved portions 151a and 151b is connected to the second connection portion 151b. The circumferential line 151 is formed in the shape of a closed loop along the circumference of the circular display unit 120. [

The first shoulder line 153 is formed to have a constant curvature between the first connecting portion 151c of the circumferential line 151 and the first driving power source pad of the driving pad portion 113a to form one end of the circumferential line 151 Except that it is connected to the first driving power supply pad.

The second shoulder line 155 is formed to have a constant curvature between the second connection portion 151d of the circumferential line 151 and the second driving power source pad of the driving pad portion 113a so that the other end of the circumferential line 151 Is connected to the second driving power supply pad.

The first curved portion 151a and the second curved portion 151b may not be formed on the same layer on the substrate 110 but may overlap each other on the substrate 110. [ For example, the first curved portion 151a may be formed on the same layer as the data line DL, and the second curved portion 151b may be formed on the first curved portion 151a, And the anode electrode. At this time, the first connection part 151c electrically connects one end of each of the first and second curved parts 151a and 151b through a first contact hole (not shown), and the second connection part 151d electrically connects one end of each of the first and second curved parts 151a and 151b And electrically connects the other ends of the first and second curved portions 151a and 151b through two contact holes (not shown). Accordingly, the present invention can form a driving power supply line 150 having a closed loop form without increasing the formation area of the driving power supply line 150. [

Therefore, the present invention provides the pixel driving power supply Vdd to each pixel P by using the driving power supply line 150 including the closed loop line 151, so that the voltage drop of the pixel driving power supply Vdd Thereby minimizing or preventing degradation in image quality due to voltage drop of the pixel driving power supply Vdd.

9 is a view for explaining a modified example of the display device of the present invention shown in Figs. 1 to 8, which further constitutes a selection unit. Accordingly, the same reference numerals as those in FIG. 1 denote the same reference numerals in FIG. 9, and the following description will focus on the selection unit and its associated configuration.

9, the selection unit 170 includes a plurality of selection circuits 172 formed along the circumference of the circular display unit 120 and connected by two or more data lines DL.

Each of the plurality of selection circuits 172 is connected in a one-to-one manner to a plurality of data groups formed by units of two or more data lines, thereby driving the data lines included in each data group in a time division manner. Each of the plurality of selection circuits 172 according to an example may be a multiplexing circuit having one input terminal and two or more output terminals, for example, a multiplexer. A data signal (Vdata) is supplied to the input terminals of each of the plurality of selection circuits (172) from the driving circuit section (130). Output terminals of each of the plurality of selection circuits 172 are connected one-to-one with the data lines included in each data group. Each of the plurality of selection circuits 172 sequentially supplies the data signal Vdata supplied to the input terminal to the data lines included in each data group in response to the time division selection signal.

In general, since one unit pixel is composed of red, green, and blue pixels, each data group may include three data lines in order to facilitate the driving of the unit pixel. In this case, each of the plurality of selection circuits 172 may have 3i output channels (where i is a natural number). As a result, it is preferable that the number of data lines included in each data group and the number of output terminals of the selection circuit 172 correspond to the number of pixels constituting one unit pixel or an integral multiple of the number of pixels constituting one unit pixel Do.

Accordingly, the present invention reduces the formation area of the data link lines by reducing the number of data link lines by using the selector 170 to reduce the length between the first and second parentheses CP1 and CP2 The circular arc portion 111 of the substrate 110 can be formed more concentrically with the circular display portion 120 and the bezel width BW of the display device can be further reduced.

Meanwhile, as described above, in the display device according to an example of the present invention, each pixel is provided in Korean Patent Laid-Open Nos. 10-2009-0046983, 10-2010-0047505, 10-2011-000057534, 10 -2012-0045252, 10-2012-0076215, 10-2013-0066449, 10-2013-0066450, 10-2013-00741473, Korean Patent No. 10-0846790, or 10th -1073226. ≪ / RTI > In this case, each of the pixels is connected to a driving power supply line and a reference line. At this time, the driving power supply line has the same structure as described above. The reference line may be formed between the cathode power supply line 160 and the circular display unit 120 so as to have the same structure as the driving power supply line described above so that the reference voltage may be supplied from the display driver to each pixel .

On the other hand, in the display device according to an exemplary embodiment of the present invention, each pixel is described in Korean Patent Publication Nos. 10-0846591, 10-2012-0042084, 10-2012-0069481, And Korean Patent Laid-Open Publication No. 10-2012-0075828. In this case, each of the pixels is connected to a driving power supply line and a compensation power line. At this time, the driving power supply line has the same structure as described above. The compensation power supply line may be formed between the cathode power supply line 160 and the circular display unit 120 so as to have the same structure as the driving power supply line described above, have.

As a result, the structure of the driving power supply line and the connection structure between the driving power supply line and the pixel according to the present invention can be equally applied to a power supply line that supplies power to the pixels.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. Will be clear to those who have knowledge of. Therefore, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

100: support substrate 110: substrate
111: arc part 113: drive circuit connection part
115: touch circuit connection unit 120: circular display unit
130: driving circuit part 140: scan driving circuit
150: driving power supply line 151: circumferential line
153: first shoulder line 155: second shoulder line
157: connection line 160: cathode power supply line
170: selection unit 172: selection circuit

Claims (20)

A substrate having a circular arc portion and a drive circuit connection portion protruding from one side of the circular arc portion;
A circular display portion formed on the arc portion of the substrate and including a plurality of pixels;
A data line and a pixel power line for supplying a data signal and a driving power to each of the plurality of pixels;
A driving power supply line formed on the substrate along the periphery of the circular display portion and connected to the driving circuit connection portion; And
And power supply sharing means connected to the driving power supply line and connecting two or more adjacent pixel power supply lines,
Wherein the power sharing means does not overlap the data line,
And the at least two adjacent pixel power supply lines are connected in common to one power sharing means. The method according to claim 1,
Wherein the power sharing means does not overlap a data line to which a pixel-by-pixel data signal is supplied through the driving circuit connection portion. A substrate having an arcuate portion;
A circular display portion formed on the arc portion of the substrate and including a plurality of pixels;
A data line, a gate line, and a pixel power line for supplying a driving signal and a driving power to each of the plurality of pixels;
A driving power supply line formed on the substrate along the periphery of the circular display portion; And
And power supply sharing means connected to the driving power supply line and connecting two or more adjacent pixel power supply lines,
Wherein the power sharing means improves the deviation of the driving power between two or more adjacent pixel power supply lines,
Wherein the power sharing means does not overlap the data line to which the data signal for each pixel is supplied,
And the at least two adjacent pixel power supply lines are connected in common to one power sharing means. The method of claim 3,
The data line intersects the gate line, and the gate line crosses the pixel power line. delete 5. The method of claim 4,
The substrate further includes a drive circuit connection portion protruding from one side of the arc portion,
Wherein the power supply sharing means supplies the data signal for each pixel through the driving circuit connection portion And does not overlap the data line. The method according to any one of claims 1, 2, 3, 4, and 6,
And a dummy pixel provided at one end of the circular display portion. The method according to any one of claims 1, 2, 3, 4, and 6,
And the power supply sharing means supplies the driving power to the lower end portion of the pixel power supply line. The method according to any one of claims 1, 2, 3, 4, and 6,
Wherein the driving power supply line is formed in a closed loop shape surrounding the circular display portion. 7. The method according to claim 1 or 6,
And a driving circuit portion mounted on the driving circuit connection portion. 7. The method according to claim 1 or 6,
And a cathode power supply line formed on the substrate along the periphery of the circular display portion and connected to the drive circuit connection portion. 7. The method according to claim 1 or 6,
Wherein the power sharing means is provided in a lower region of the circular arc portion along the circumference of the circular display portion,
And a lower region of the arc portion is included in the other side of the arc portion opposite to one side of the arc portion. 7. The method according to claim 1 or 6,
And a drive pad unit provided on the drive circuit connection unit. 14. The method of claim 13,
And a driving power pad provided on both sides of the driving pad unit. 15. The method of claim 14,
Wherein the driving circuit connection portion further includes a driving shoulder line connected to each of the driving power supply pads provided on both sides of the driving pad portion. 16. The method of claim 15,
And the driving shoulder line is electrically connected to the driving power supply line. 15. The method of claim 14,
Wherein the driving circuit connection portion further comprises a connection line connecting driving shoulder lines connected to the driving power supply pads provided on both sides of the driving pad portion. The method according to any one of claims 1, 2, 3, 4, and 6,
And a selection circuit formed along the periphery of the circular display and connected to two or more of the data lines. 7. The method according to claim 1 or 6,
Further comprising a selection circuit formed along the periphery of the circular display and connected to two or more of the data lines,
Wherein the selection circuit is formed along the periphery of the circular display portion in an upper region of the circular arc portion defined between a central portion of the circular arc portion and one side of the circular arc portion. 20. The method of claim 19,
Wherein the selection circuit is a multiplexing circuit.

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