KR20070050209A - Display device - Google Patents

Abstract

The present invention relates to a display device, wherein the display device includes a plurality of pixels formed on the display panel, a plurality of image data lines for transmitting an image data signal to the pixels, and a plurality of image scanning lines for transmitting an image scanning signal to the pixels. A plurality of vertical sensing data lines transferring a first sensing data signal and formed together with an image data line, a plurality of horizontal sensing data lines carrying a second sensing data signal and formed together with the scan line, and receiving a reference voltage; A plurality of vertical reference voltage lines formed together with the image scanning lines, a plurality of horizontal reference voltage lines applied with the reference voltage, and formed with the image scanning lines, and connected to the horizontal sensing data lines, formed together with the image data lines, and formed in a vertical direction And a plurality of island-shaped capacitive electrode wirings. As a result, the capacitor electrode wiring connected to the horizontal sensing data line formed together with the image scanning line is formed to be long along the image data line in the vertical direction, thereby reducing the reduction of the aperture ratio due to the sensing unit.

Display, touch sensor, sensor, sensing data line, capacitive electrode wiring, variable capacitor, reference voltage line, reference capacitor, pressure sensor, touch screen

Description

Display device {DISPLAY DEVICE}

1 is a block diagram of a liquid crystal display according to an exemplary embodiment of the present invention, which is a block diagram of the liquid crystal display shown in terms of a pixel.

2 is an equivalent circuit diagram of one pixel of a liquid crystal display according to an exemplary embodiment of the present invention.

3 is a block diagram of a liquid crystal display according to an exemplary embodiment of the present invention, and is a block diagram of the liquid crystal display shown in terms of a sensing unit.

4 is an equivalent circuit diagram of a sensing unit of a liquid crystal display according to an exemplary embodiment of the present invention.

5 is a schematic diagram of a liquid crystal display according to an exemplary embodiment of the present invention.

6 is a schematic diagram illustrating an arrangement of a pixel and a sensing unit in a liquid crystal display according to an exemplary embodiment of the present invention.

FIG. 7 is a layout view of a liquid crystal display for the LD1 part of FIG. 6.

FIG. 8 is a cross-sectional view of the liquid crystal display of FIG. 7 taken along the line VIII-VIII. FIG.

FIG. 9 is a layout view of a liquid crystal display for the LD2 part in FIG. 6.

FIG. 10 is a cross-sectional view of the liquid crystal display of FIG. 9 taken along the line XI-XI. FIG.

FIG. 11 is a layout view of a liquid crystal display for the LD3 part of FIG. 6.

12 is a cross-sectional view of the liquid crystal display of FIG. 11 taken along the line XII-XII.

FIG. 13 is a layout view of a liquid crystal display for the LD4 part in FIG. 6.

14 is a cross-sectional view of the liquid crystal display of FIG. 13 taken along the line XVI-XVI.

The present invention relates to a display device.

Typical liquid crystal displays (LCDs) among display devices include two display panels provided with pixel electrodes and a common electrode, and a liquid crystal layer having dielectric anisotropy interposed therebetween. The pixel electrodes are arranged in a matrix and connected to switching elements such as thin film transistors (TFTs) to receive data voltages one by one in sequence. The common electrode is formed over the entire surface of the display panel and receives a common voltage. The pixel electrode, the common electrode, and the liquid crystal layer therebetween form a liquid crystal capacitor, and the liquid crystal capacitor becomes a basic unit that forms a pixel together with a switching element connected thereto.

In such a liquid crystal display, a voltage is applied to two electrodes to generate an electric field in the liquid crystal layer, and the intensity of the electric field is adjusted to adjust the transmittance of light passing through the liquid crystal layer to obtain a desired image.

A touch screen panel is a device that touches a finger or a touch pen (stylus) on the screen to write and draw letters or pictures, or execute icons to perform a desired command on a machine such as a computer. . A liquid crystal display with a touch screen panel may find out whether a user's finger or a touch pen touches the screen and contact position information. However, such a liquid crystal display device has problems such as a cost increase due to a touch screen panel, a decrease in yield due to a process of adhering the touch screen panel to a liquid crystal display panel, a decrease in luminance of the liquid crystal panel, and an increase in product thickness.

Therefore, in order to solve these problems, a technology for embedding a sensing element made of a thin film transistor instead of a touch screen panel inside a pixel displaying an image in a liquid crystal display device has been developed. The sensing element detects a change in light applied to the screen by a user's finger or the like so that the liquid crystal display may determine whether the user's finger or the like has touched the screen and the contact position information.

However, the sensing element and the wiring for the same occupy a large area, thereby reducing the aperture ratio of the liquid crystal display.

Accordingly, an object of the present invention is to reduce the reduction of the aperture ratio of the display device due to the sensing element.

According to an aspect of the present invention, a display panel, a plurality of pixels formed on the display panel, and a plurality of image data lines extending in a first direction while transferring image data signals to the pixels are provided. A plurality of image scanning lines transferring an image scanning signal to the pixel and extending in a second direction, a plurality of first sensing data lines transferring a first sensing data signal and extending in the first direction, and a second sensing data signal A plurality of second sensing data lines extending in the second direction and receiving a first reference voltage, and receiving a plurality of first reference voltage lines extending in the second direction and a second reference voltage, A plurality of second reference voltage lines extending in a direction and the plurality of island-type capacitor electrodes connected to the second sensing data lines and extending in the first direction It includes wiring.

Preferably, the first sensing data line is formed on a different layer from the second sensing data line, and the capacitor electrode wiring is formed on the same layer as the first sensing data line.

It is preferable that the capacitor electrode wiring is formed in a pixel row assembly unit.

Preferably, the length of the capacitor electrode wiring does not exceed the vertical length of the pixel row set.

Each of the first reference voltage line and the second reference voltage line may include a plurality of protrusions, and an area of the protrusion of the second reference voltage line may be wider than an area of the protrusion of the first reference voltage line. In this case, the area of the protrusion of the second reference voltage line may be twice the area of the protrusion of the first reference voltage line.

The number of the first reference voltage lines may be greater than the number of the second reference voltage lines. In this case, the number of the first reference voltage lines may be twice the number of the second reference voltage lines.

The pixels may be arranged in opposite directions with respect to the first sensing data line or the capacitive electrode wiring and connected to the image data line.

The arrangement position of the image data line may be changed in units of dots.

However, pixels arranged in the same column are preferably connected to data lines arranged in the same direction.

The display device may further include a plurality of contact parts, and the second sensing data line is connected to the capacitive electrode wire through the contact part.

Each of the pixels may include a switching element connected to the image scanning line, the image data line, and a pixel electrode connected to the switching element, and the contact portion may be made of the same material as the pixel electrode.

The first and second reference voltages may be the same.

DETAILED DESCRIPTION Embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the other part being "right over" but also another part in the middle. On the contrary, when a part is "just above" another part, there is no other part in the middle.

A liquid crystal display, which is one embodiment of the display device of the present invention, will now be described in detail with reference to FIGS. 1 to 5.

1 is a block diagram of a liquid crystal display according to an exemplary embodiment of the present invention, which is a block diagram of a liquid crystal display according to a pixel, and FIG. 2 is a pixel of the liquid crystal display according to the exemplary embodiment of the present invention. Equivalent circuit diagram. 3 is a block diagram of a liquid crystal display according to an exemplary embodiment of the present invention, which is a block diagram of the liquid crystal display according to a sensing unit, and FIG. 4 is a sensing diagram of the liquid crystal display according to the exemplary embodiment of the present invention. Equivalent circuit diagram for negative. 5 is a schematic diagram of a liquid crystal display according to an exemplary embodiment of the present invention.

1 and 3, a liquid crystal display according to an exemplary embodiment of the present invention may include a liquid crystal panel assembly 300, an image scanning unit 400, an image data driver 500, and a liquid crystal panel assembly 300 connected thereto. A sensing signal processor 800, a gray voltage generator 550 connected to the image data driver 500, a contact determiner 700 connected to the sensing signal processor 800, and a signal controller 600 for controlling them. .

1 to 4, the liquid crystal panel assembly 300 includes a plurality of display signal lines G ₁ -G _n , D ₁ -D _m , and a plurality of pixels PX connected thereto and arranged in a substantially matrix form. ), and a plurality of sensing signal lines _{(SY 1 -SY N, SX 1} -SX M, RL) and is connected thereto and comprises a plurality of sensing units (SU) are arranged in the form of a substantially matrix. 2 and 5, the liquid crystal panel assembly 300 includes a thin film transistor array panel 100 and a common electrode panel 200 facing each other, a liquid crystal layer 3 interposed therebetween, and two display panels. Spacer (not shown) which forms a gap between 100 and 200 and which is deformed to some extent is included.

The display signal lines G ₁ -G _n and D ₁ -D _m are a plurality of image scanning lines G ₁ -G _n for transmitting an image scanning signal and an image data line D ₁ -D _m for transmitting an image data signal. sensing a signal line, comprising a _{(SY 1 -SY N, SX 1} -SX M, RL) includes a plurality of horizontal sensing data lines for transmitting the detected data signal (SY ₁ -SY _N) and a plurality of vertical sensing data line (SX ₁ -SX _M ) and a plurality of reference voltage lines RL for transmitting a reference voltage. The reference voltage line RL may be omitted as necessary.

The image scanning lines G ₁ -G _n and the horizontal sensing data lines SY ₁ -SY _N extend substantially in the row direction and are substantially parallel to each other, and the image data lines D ₁ -D _m and the vertical sensing data lines ( SX ₁ -SX _M ) extend in approximately the column direction and are substantially parallel to each other. The reference voltage line RL extends in the row or column direction.

Each pixel PX includes a switching element Q connected to the display signal lines G ₁ -G _n , D ₁ -D _m , a liquid crystal capacitor Clc, and a storage capacitor Cst connected thereto. ). Holding capacitor Cst can be omitted as needed.

The switching element Q is a three-terminal element such as a thin film transistor provided in the thin film transistor array panel 100, the control terminal of which is connected to the image scanning line G ₁ -G _n , and the input terminal of the thin film transistor display panel 100. D ₁ -D _m ), and the output terminal is connected to the liquid crystal capacitor Clc and the storage capacitor Cst. In this case, the thin film transistor includes amorphous silicon or poly crystalline silicon.

The liquid crystal capacitor Clc has two terminals, the pixel electrode 191 of the thin film transistor array panel 100 and the common electrode 270 of the common electrode display panel 200, and the liquid crystal layer 3 between the two electrodes 191 and 270. Functions as a dielectric. The pixel electrode 191 is connected to the switching element Q, and the common electrode 270 is formed on the entire surface of the common electrode display panel 200 and receives the common voltage Vcom. Unlike in FIG. 2, the common electrode 270 may be provided in the thin film transistor array panel 100. In this case, at least one of the two electrodes 191 and 270 may be linear or rod-shaped.

The storage capacitor Cst, which serves as an auxiliary role of the liquid crystal capacitor Clc, is formed by overlapping a separate signal line (not shown) and the pixel electrode 191 provided in the thin film transistor array panel 100 with an insulator interposed therebetween. A predetermined voltage such as the common voltage Vcom is applied to this separate signal line. However, the storage capacitor Cst may be formed such that the pixel electrode 191 overlaps the front end image scanning line directly above the insulator.

On the other hand, in order to implement color display, each pixel PX uniquely displays one of the primary colors (spatial division) or each pixel PX alternately displays the primary colors over time (time division). The desired color is recognized by the spatial and temporal sum of these primary colors. Examples of the primary colors include three primary colors such as red, green, and blue. FIG. 2 illustrates that each pixel PX includes a color filter 230 representing one of the primary colors in an area of the common electrode display panel 200 corresponding to the pixel electrode 191 as an example of spatial division. . Unlike FIG. 2, the color filter 230 may be formed above or below the pixel electrode 191 of the thin film transistor array panel 100.

At least one polarizer (not shown) for polarizing light is attached to an outer surface of the liquid crystal panel assembly 300.

The sensing unit SU may have a structure shown in FIG. 4.

The sensing unit SU shown in FIG. 4 is provided between the variable capacitor Cv, the sensing data line SL, and the reference voltage line RL connected to the sensing data line (hereinafter, referred to as sensing data line) indicated by the reference numeral SL. It includes a reference capacitor (Cp) connected to.

The reference capacitor Cp is formed by overlapping the reference voltage line RL and the sensing data line SL of the thin film transistor array panel 100 with an insulator interposed therebetween.

The variable capacitor Cv has the sensing data line SL of the thin film transistor array panel 100 and the common electrode 270 of the common electrode display panel 200 as two terminals, and the liquid crystal layer 3 between the two terminals functions as a dielectric. do. The capacitance of the variable capacitor Cv is changed by an external stimulus such as a user's touch applied to the liquid crystal panel assembly 300. For example, pressure may be used as the external stimulus. When pressure is applied to the common electrode display panel 200, the distance between the two terminals is changed to change the capacitance of the variable capacitor Cv. When the capacitance changes, the magnitude of the contact voltage Vp between the reference capacitor Cp and the variable capacitor Cv changes, depending on the magnitude of the capacitance. The contact voltage Vp flows on the sensing data line SL as a sensing data signal, and based on the contact voltage Vp, the contact voltage Vp may be determined. In this case, the reference capacitor Cp has a fixed capacitance, and the reference voltage applied to the reference capacitor Cp has a constant voltage value, so that the contact voltage Vn varies in a certain range. Therefore, the sensing data signal may always have a voltage range within a certain range, thereby easily determining whether or not the contact is made.

The sensing unit SU is disposed between two adjacent pixels PX. As illustrated in FIG. 3, the entire liquid crystal panel assembly 300 is arranged in a substantially matrix form, and is connected to horizontal and vertical sensing data lines SY ₁ -SY _N and SX ₁ -SX _M , respectively. The density of the pair of sensing units SU disposed adjacent to the area may be, for example, about 1/4 of the dot density. Here, one dot includes, for example, three pixels PX arranged side by side and displaying three primary colors such as red, green, and blue, displaying one color, and a basic unit representing the resolution of the liquid crystal display device. do. However, one dot may consist of four or more pixels PX, and in this case, each pixel PX may display one of three primary colors and white.

An example in which the density of the pair of sensing units SU is 1/4 of the dot density is one in which the horizontal and vertical resolutions of the pair of sensing units SU are 1/2 of the horizontal and vertical resolutions of the liquid crystal display device, respectively. Can be. In this case, there may be a pixel row and a pixel column without the sensing unit SU.

By matching the detection unit SU density and the dot density to such an extent, the liquid crystal display device may be applied to high precision applications such as character recognition. Of course, the resolution of the sensing unit SU may be higher or lower as necessary.

As described above, according to the sensing unit SU according to the exemplary embodiment of the present invention, since the space occupied by the sensing unit SU and the sensing data line SL is relatively small, the reduction of the aperture ratio of the pixel PX can be minimized.

Referring back to FIGS. 1 and 3, the gray voltage generator 550 generates two sets of gray voltage sets (or reference gray voltage sets) related to the transmittance of the pixel. One of the two sets has a positive value for the common voltage Vcom and the other set has a negative value.

The image scanning unit 400 is connected to the image scanning lines G ₁ -G _n of the liquid crystal panel assembly 300 to gate-on voltage Von for turning on the switching element Q, and gate-off voltage Voff for turning off. ) Is applied to the image scanning lines G ₁ -G _n .

The image data driver 500 is connected to the image data lines D ₁ -D _m of the liquid crystal panel assembly 300, and selects a gray voltage from the gray voltage generator 550 and uses the image data as the image data signal. Applies to lines D ₁ -D _m . However, when the gray voltage generator 550 provides only a predetermined number of reference gray voltages instead of providing all voltages for all grays, the image data driver 500 divides the reference gray voltages so that the grays for all grays are divided. Generates a voltage and selects an image data signal among them.

Detection signal processing section 800 is connected to the sensing of the liquid crystal panel assembly 300, a data line _{(SY 1 -SY N, SX 1} -SX M) detects the data line _{(SY 1 -SY N, SX 1} -SX M) to After receiving the sensed data signal output through the signal processing such as amplification, filtering and the like to analog-to-digital conversion to generate a digital sense signal (DSN).

The touch determining unit 700 receives the digital sensing signal DSN from the sensing signal processing unit 800, performs a predetermined calculation process, determines whether the contact is made, and the contact position, and then sends the contact information INF to the external device. The touch determination unit 700 may monitor an operation state of the sensing unit SU based on the digital sensing signal DSN and control signals applied to the sensing unit SU.

The signal controller 600 controls operations of the image scanning unit 400, the image data driver 500, the gray voltage generator 550, and the detection signal processor 800.

Each of the driving devices 400, 500, 550, 600, 700, and 800 may be mounted directly on the liquid crystal panel assembly 300 in the form of at least one integrated circuit chip, or may be a flexible printed circuit film ( It may be mounted on the liquid crystal panel assembly 300 in the form of a tape carrier package (TCP) or mounted on a separate printed circuit board (not shown). Alternatively, these driving devices 400, 500, 550, 600, 700, and 800 are connected to signal lines G ₁ -G _n , D ₁ -D _m , SY ₁ -SY _N , SX ₁ -SX _M and thin film transistors ( Q) together with the liquid crystal panel assembly 300 may be integrated.

Referring to FIG. 5, the liquid crystal panel assembly 300 is divided into a display area P1, an edge area P2, and an exposure area P3. Most of the pixel PX, the sensing unit SU, and the signal lines G ₁ -G _n , D ₁ -D _m , SY ₁ -SY _N , SX ₁ -SX _M , RL are positioned in the display area P1. . The common electrode display panel 200 includes a black matrix (not shown), and the black matrix covers most of the edge region P2 to block light from the outside. Since the common electrode panel 200 is smaller than the thin film transistor array panel 100, a portion of the thin film transistor array panel 100 is exposed to form an exposed area P3, and a single chip 610 is mounted in the exposed area P3. A flexible printed circuit board 620 is attached.

The single chip 610 is a driving device for driving a liquid crystal display, that is, an image driver 400, an image data driver 500, a gray voltage generator 550, a signal controller 600, and a contact determiner ( 700, and a sensing signal processor 800. By integrating the driving devices 400, 500, 550, 600, 700, and 800 in a single chip 610, the mounting area may be reduced, and power consumption may be reduced. Of course, if desired, at least one of them or at least one circuit element constituting them may be outside the single chip 610.

The image signal lines G ₁ -G _n , D ₁ -D _m and the sensing data lines SY ₁ -SY _N , SX ₁ -SX _M extend to the exposure area P3 so that the corresponding driving devices 400, 500, 800 ).

The FPC board 620 receives a signal from an external device and transmits the signal to the single chip 610 or the liquid crystal panel assembly 300, and an end is usually formed of a connector (not shown) to facilitate connection with the external device. .

Next, the display operation and the detection operation of the liquid crystal display will be described in more detail.

Next, the display operation and the detection operation of the liquid crystal display will be described in more detail.

The signal controller 600 receives input image signals R, G, and B and an input control signal for controlling the display thereof from an external device (not shown). The input video signals R, G, and B contain luminance information of each pixel PX, and the luminance is a predetermined number, for example, 1024 (= 2 ¹⁰ ), 256 (= 2 ⁸ ), or 64 (= 2 ⁶ ) It has gray. Examples of the input control signal include a vertical sync signal Vsync, a horizontal sync signal Hsync, a main clock MCLK, and a data enable signal DE.

The signal controller 600 receives the input image signals R, G, and B based on the input image signals R, G, and B and the input control signal, and generates operating conditions of the liquid crystal panel assembly 300 and the image data driver 500. The image scanning control signal CONT1, the image data control signal CONT2, the sensing data control signal CONT3, and the like, and then the image scanning control signal CONT1 is transferred to the image scanning unit 400. The image data control signal CONT2 and the processed image signal DAT are exported to the image data driver 500, and the detection data control signal CONT3 is sent to the detection signal processor 800.

The image scan control signal CONT1 includes a scan start signal STV indicating the start of scanning and at least one clock signal controlling the output of the gate-on voltage Von. The image scan control signal CONT1 may further include an output enable signal OE that defines a duration of the gate-on voltage Von.

The image data control signal CONT2 is a load signal for applying the image data signal to the horizontal synchronization start signal STH indicating the start of transmission of the image data DAT in one pixel row and the image data lines D ₁ -D _m . LOAD) and data clock signal HCLK. The image data control signal CONT2 is also an inversion signal for inverting the voltage polarity of the image data signal with respect to the common voltage Vcom (hereinafter referred to as the polarity of the image data signal by reducing the voltage polarity of the image data signal with respect to the common voltage). RVS) may be further included.

In response to the image data control signal CONT2 from the signal controller 600, the image data driver 500 receives the digital image signal DAT for the pixel PX of one pixel row, and each digital image signal DAT. By converting the digital image signal DAT into an analog image data signal by selecting a gray scale voltage corresponding to), it is applied to the corresponding image data lines D ₁ -D _m .

The image scanning unit 400 applies the gate-on voltage Von to the image scanning lines G ₁ -G _n in response to the image scanning control signal CONT1 from the signal controller 600, thereby applying the image scanning lines G ₁ -G. _n ) turns on the switching element Q connected. Then, the image data signal applied to the image data lines D ₁ -D _m is applied to the pixel PX through the turned-on switching element Q.

The difference between the voltage of the image data signal applied to the pixel PX and the common voltage Vcom is shown as the charging voltage of the liquid crystal capacitor Clc, that is, the pixel voltage. The arrangement of the liquid crystal molecules varies according to the magnitude of the pixel voltage, thereby changing the polarization of light passing through the liquid crystal layer 3. The change in polarization is represented as a change in the transmittance of light by the polarizer attached to the liquid crystal panel assembly 300, and thus a desired image may be displayed.

This process is repeated in units of one horizontal period (also referred to as 1H "and equal to one period of the horizontal sync signal Hsync and the data enable signal DE), thereby repeating all image scanning lines G ₁ -G _n . The image data signal is applied to all the pixels PX by sequentially applying the gate-on voltage Von to display an image of one frame.

When one frame ends, the next frame starts and the state of the inversion signal RVS applied to the image data driver 500 is controlled so that the polarity of the image data signal applied to each pixel PX is opposite to that of the previous frame. ("Frame inversion"). In this case, the polarity of the image data signal flowing through one image data line is changed (eg, inversion or point inversion) according to the characteristics of the inversion signal RVS within one frame, or the image data signal applied to one pixel row is changed. The polarities can also be different (eg heat inversion, point inversion).

The sensing signal processing unit 800 flows through the sensing data line SY ₁ -SY _N , SX ₁ -SX _M in a porch section between the frame once every frame according to the sensing data control signal CONT3. Read the sense data signal. In the porch section, since the sensing data signal is less affected by the driving signals from the image scanning unit 400, the image data driver 500, and the like, the reliability of the sensing data signal is increased. However, such a read operation is not necessarily performed every frame, and may be performed once every plurality of frames as necessary.

Then, the sensing signal processor 800 converts the read analog sensing data signal into a digital sensing signal DSN after signal processing such as amplification and filtering, and sends it to the touch determination unit 700.

The touch determination unit 700 receives a digital sensing signal DSN, performs appropriate arithmetic processing to find out whether a contact is made and a contact position, and transmits the same to an external device, and the external device transmits the image signals R, G, and B based thereon. Transfer to the liquid crystal display device.

Next, an arrangement of the pixel and the sensing unit according to the exemplary embodiment of the present invention will be described with reference to FIG. 6.

6 is a diagram illustrating an arrangement of a pixel and a sensing unit according to an exemplary embodiment of the present invention.

As shown in Fig. 6, since the arrangement of signal lines, pixels, and sensing units is equally repeated every predetermined number, for example, four consecutive pixel rows (hereinafter referred to as 'pixel row sets'), one frame Only the action set 101 will be described.

Referring to FIG. 6, as described above, the plurality of pixels PX including the pixel electrode 191 and the switching element Q are arranged in a matrix form on the liquid crystal panel assembly 300, and the plurality of image data are arranged. Lines D _{p to} D _{p + 9} , a plurality of image scanning lines G _{q to} G _{q + 4} , a plurality of horizontal sensing data lines SYt, a plurality of vertical sensing data lines SXk, and a plurality of reference voltage lines ( RL _x1 , RL _x2 , RL _Y ) and a plurality of capacitor electrode wirings Cap are formed.

The plurality of image data lines D _{p to} D _{p + 9} extend in the column direction, and are connected to the corresponding pixel electrode 191 through adjacent switching elements Q, respectively. The plurality of image data lines D _{p to} D _{p + 9} are arranged in opposite directions with respect to the vertical sensing data line SXk. That is, as illustrated in FIG. 6, each pixel PX of the dot DT1 (hereinafter referred to as 'first dot') arranged on the left side with respect to the vertical sensing data line SXk is disposed on the left side. The pixels PX of the dots DT2 (hereinafter referred to as second dots') arranged on the right side are respectively connected to the data lines D _p and D _{p + 1} , respectively. It is connected to (D _{p + 2} , D _{P + 3} , D _{P + 4} ) respectively. The structure of the first and second dots is substantially symmetrical. As described above, one dot includes three pixels PX. In addition, the image data lines D _{p + 4} and D _{p + 5} between two adjacent dots DT2 and DT1 are arranged in opposite directions. For example, the pixel PX constituting any one dot DT2 is connected to the data lines D _{P + 2} , D _{p + 3} and D _{p + 4} arranged on the right side, and the next dot DT1. Each pixel of is connected to the data lines D _{p + 5} , D _{p + 6} and D _{p + 7} arranged on the left side. However, two pixels of the dots PX adjacent in the column direction are connected to the data lines in the same direction.

As described above, in the liquid crystal display, the first dot DT1 and the second dot DT2 are alternately arranged.

As the image data lines of the dots DT1 and DT2 arranged on the left and right sides of the vertical sensing data line SXk are disposed in opposite directions, the vertical sensing data line SKk and the respective image data lines D _p adjacent thereto. _The pixel PX is disposed between ₊₁ and D _{p + 2} , and the vertical sensing data line SXx and the corresponding image data line D _{p + 1} and D _{p + 2} are disposed as long as the pixel PX is disposed. Since the distance between them is farther away, the distortion of the sensing data signal Vp due to the change of the image data signal can be reduced. Also, by arranging the image data lines D _{p + 4} and D _{p + 5} formed between two adjacent dots DT1 and DT2 in opposite directions, the vertical sensing data lines SXk are formed between adjacent dots of the corresponding portion. The distance between the gaps is increased to compensate for the gap between the adjacent dots DT1 and DT2 of the portion where the vertical sensing data line SXk is not formed.

The plurality of image scanning lines G _q -G _{q + 4} extend in the row direction and are disposed below the pixel row and are connected to the pixel electrode 191 through adjacent switching elements Q, respectively.

The plurality of horizontal sensing data lines SYt extend in parallel to the image scanning line G _q adjacent to an upper portion adjacent to the pixel electrode 191 of the first pixel row in the pixel row set 101. One by one).

The plurality of vertical sensing data lines SXk are arranged for every predetermined number, for example, for each of 12 consecutive pixel columns (hereinafter referred to as "pixel column sets"), that is, for every four dot columns. Each vertical sensing data line SXk overlaps the common electrode of the upper panel 200 to form a variable capacitor Cvx.

The capacitive electrode wires Cap are connected to the horizontal sensing data line SYt through the connection part C1 and have a stripe shape extending in the vertical direction. Each capacitive electrode line Cap overlaps the common electrode of the upper panel 200 to form a variable capacitor Cv _Y. In FIG. 6, the vertical length of each capacitor electrode wiring Cap is substantially equal to the vertical length of the pixel row set, but not to exceed the vertical length of the pixel row set to increase the capacitance of the variable capacitor Cv _Y to the maximum. . However, the length or shape of the capacitive wiring Cap may be changed depending on the capacitance of the variable capacitor Cv _Y or the vertical axis size of the pixel row set.

As illustrated in FIG. 6, the plurality of horizontal reference voltage lines RL _Y extend in the horizontal direction so as to overlap the pixel electrode 191 in the fourth pixel row, which is the last pixel row of the pixel row set 101. Each horizontal reference voltage line RL _Y includes a protrusion PY that protrudes up and down for each pixel column set. The protrusion PY overlaps the capacitor electrode wiring Cap to form a reference capacitor Cp _Y.

As illustrated in FIG. 6, the plurality of vertical reference voltage lines RL _X1 and RL _{X2 each} extend in the horizontal direction to overlap the pixel electrode 191 at the second pixel row in the pixel row set 101. The reference voltage line RL _X1 and the second vertical reference voltage line RL _X2 extending in the horizontal direction to overlap the pixel electrode 191 in the third pixel row. Each of the first and second vertical reference voltage lines RL _X1 and RL _X2 includes protrusions PYa and PYb that protrude upward for each set of pixel columns. These protrusions PYa and PYb overlap the vertical sensing data lines SXk to form reference capacitors Cp _x1 and Cp _x2 , respectively.

The pair of reference capacitors Cp _x1 and Cp _x2 and one variable capacitor Cvx form a sensing unit SU connected to the vertical sensing data line SXk, and one reference capacitor Cp _Y and one The variable capacitor Cv _Y forms the sensing unit SU connected to the horizontal sensing data lines SYt and SYt + 1.

Since the protrusion PY formed on the horizontal reference voltage line RL _Y protrudes up and down, an area overlapping the capacitor electrode wiring Cap is defined by the protrusion PYa or PYb of one vertical reference voltage line RL _x1 or PL _x2 . It is about 1/2 smaller than the area overlapping the vertical sensing data line SXk. Therefore, two vertical reference voltage lines (RL _x1 , PL _x2 ) to form an overlap between the protrusions PYa and PYb of the two vertical reference voltage lines RL _x1 and PL _x2 and the sensing data line SXk and the protrusion PY of the horizontal reference voltage line RL _Y. It is substantially equal to the overlapping area with the capacitor electrode wiring Cap. As a result, the total capacity of the pair of reference capacitors Cp _x1 and Cp _x2 and the capacity of one reference capacitor Cp _Y become almost similar. In addition, since two vertical pseudo voltage lines RL _x1 and PL _x2 are formed and arranged in a horizontal direction in different pixel rows, signal lines SYt, RL _x1 , PL _x2 and RL _Y are formed in all pixel rows of the pixel row set. Be sure to For this reason, arrangement | positioning of a signal line etc. becomes uniform and it reduces the quality image defects, such as a streak spot.

6, the positions of the reference voltage lines RL _x1 , PL _x2 , PL _Y and the formation positions and the number of the protrusions DY, DYa, and DYb described above can be changed as necessary. For example, when the horizontal sensing data line SYt is formed in the second or third pixel row, the capacitive electrode wiring Cap may have a shape extending almost up and down nearly the first and fourth pixel rows. When formed in the fourth pixel row, the capacitive electrode wiring Cap may have a shape extending up to almost the first pixel row.

Next, referring to FIGS. 7 to 14, the arrangement of the signal lines Dp to Dp + 9, Gq to Gq + 4, SYt, SXk, RL _x1 , PL _x2 , and PL _Y , and the capacitive electrode wiring Cap may be arranged. The liquid crystal display device according to an embodiment of the present invention having will be described in detail.

FIG. 7 is a layout view of the liquid crystal display of the LD1 portion of FIG. 6, and FIG. 8 is a cross-sectional view of the liquid crystal display of FIG. 7 taken along the line VIII-VIII. FIG. 9 is a layout view of the liquid crystal display of the LD2 portion in FIG. 6, FIG. 10 is a cross-sectional view of the liquid crystal display of FIG. 9 taken along the line XI-XI, and FIG. 11 is a liquid crystal of the LD3 portion of FIG. 6. 12 is a layout view of the display device, and FIG. 12 is a cross-sectional view of the liquid crystal display of FIG. 11 taken along the line XII-XII. FIG. 13 is a layout view of the liquid crystal display of the LD4 portion of FIG. 6, and FIG. 14 is a cross-sectional view of the liquid crystal display of FIG. 13 taken along the line XVI-XVI.

1 to 5, a liquid crystal display according to an exemplary embodiment of the present invention includes a thin film transistor array panel 100 and a common electrode panel 200 facing each other and between the two display panels 100 and 200. The liquid crystal layer 3 is included.

First, the thin film transistor array panel 100 includes a plurality of sensing scan lines 121, a plurality of horizontal sensing data lines 122a, a plurality of vertical reference voltage lines 122b, and a plurality of insulating substrates 110 made of transparent glass or plastic. The horizontal reference voltage line 122c, the plurality of sustain electrode lines 131, and the plurality of island light blocking members 135-139 are formed.

The image scan line 121 transmits an image scan signal and mainly extends in a horizontal direction. Each image scanning line 121 includes a plurality of first and second gate electrodes 124a and 124b protruding upward. The first and second gate electrodes 124a and 124b are symmetric with each other, and the first and second gate electrodes 124a and 124b are alternately formed for each of the three gate electrodes 124a and 124b continuous in the row direction. It is not limited to this.

The horizontal sensing data line 122a transmits the sensing data signal Vp and extends in parallel with the image scanning line 121. Each horizontal sensing data line 122a includes a plurality of protrusions 126a protruding upward. Each projection 126a has a wide end portion of a rectangle.

The vertical reference voltage line 122b transmits a reference voltage and extends in parallel with the image scan line 121. Each vertical reference voltage line 122b includes a plurality of protrusions 126b that protrude upward. Each protrusion 126b has a rectangular shape.

The horizontal reference voltage line 122c also transmits a reference voltage and extends in parallel with the image scan line 121. Each horizontal reference voltage line 122c includes a plurality of protrusions 126c protruding upward and downward. The area of each protrusion 126c may be about twice the area of the protrusion 126b of the horizontal sensing data line 122b.

As described above, since two vertical reference voltage lines 122b are formed in the second and third pixel rows in the pixel row set, the number of the vertical reference voltage lines 122b is twice the horizontal reference voltage line 122c. For this reason, the total area of the protrusions 126b of the two vertical reference voltage lines 122b in the pixel row set is almost similar to the area of the protrusions 126c of the horizontal reference voltage lines 122c. However, the shape and arrangement of the vertical and horizontal reference voltage lines 122b and 122c may be modified in various ways.

The storage electrode line 131 receives a predetermined voltage such as the common voltage Vcom, and the first and second storage capacitors Cst having a broad line extending from the stem line extending substantially parallel to the image scanning line 121 and protruding therefrom. And a plurality of first to third light blocking portions 133a, 133b, and 133c extending upward from the storage electrodes 134a and 134b and preventing light leakage. As for the sustain electrodes 134a and 134b, the first sustain electrode 134a and the second sustain electrode 134b are alternately formed for each of a predetermined number, for example, three sustain electrodes 134a and 134b, which are continuous in the row direction. . For example, although the first storage electrode 134a is formed at the left side and the second storage electrode 134b is formed at the right side of the first island-shaped light blocking member 135, the present invention is not limited thereto. .

The third light blocking part 133c extends upwardly at a portion where the first and second storage electrodes 134a and 134b overlap.

The island shading members 135-139 prevent light leakage, and include a substantially rectangular first island shading member 135 that is long in the longitudinal direction, a plurality of second island shading members 136 that are substantially square, and a long rectangle in the longitudinal direction. The plurality of third island light blocking members 137, a plurality of fourth island light blocking members 138 long in the horizontal direction and having protrusions protruding upward from the center portion, the plurality of third islands having a substantially rectangular shape in the longitudinal direction And a five island light blocking member 139.

The vertical width and the horizontal width of the first island-type light blocking member 135 are greater than the fifth island-type light blocking member 139, and the vertical width and the width of the fifth island-type light blocking member 139 are greater than the third island-type light blocking member 137. Big.

The first island light blocking member 125 is formed below each horizontal sensing data line 122a, the vertical reference voltage line 122b, and the horizontal reference voltage line 122c.

The second island light blocking member 136 may include the first light blocking member 136 between the image scanning line 121 and each horizontal sensing data line 122a, the vertical reference voltage line 122b, and the horizontal reference voltage line 122c formed thereon. ) And just above it,

The third island light blocking member 137 is formed in a horizontal direction between the image scanning line 121 and each of the horizontal sensing data lines 122a and the vertical and horizontal reference voltage lines 122b and 122c respectively formed thereon.

The fourth island light blocking member 138 is disposed directly above the third light blocking portion 133c between the image scanning line 121 and the horizontal sensing data line 122a and the vertical and horizontal reference voltage lines 122b and 122c respectively formed thereon. Formed.

The fifth island light blocking member 139 is formed directly below the protrusion 126c of the horizontal reference voltage line 122c between the horizontal reference voltage line 122c and the image scanning line 121 formed below the horizontal reference voltage line 122c.

The plurality of sensing scan lines 121, the plurality of horizontal sensing data lines 122a, the plurality of reference voltage lines 122b and 122c, the plurality of sustain electrode lines 131, and the plurality of island light blocking members 135-139 are aluminum (Al). ), Aluminum-based metals such as aluminum alloys, silver-based metals such as silver (Ag) and silver alloys, copper-based metals such as copper (Cu) and copper alloys, molybdenum-based metals such as molybdenum (Mo) and molybdenum alloys, chromium (Cr), It may be made of tantalum (Ta) and titanium (Ti). However, they may have a multilayer structure including two conductive films (not shown) having different physical properties. One of the conductive films is made of a metal having low resistivity, such as aluminum-based metal, silver-based metal, or copper-based metal, so as to reduce signal delay or voltage drop. In contrast, other conductive films are made of other materials, particularly materials having excellent physical, chemical and electrical contact properties with indium tin oxide (ITO) and indium zinc oxide (IZO), such as molybdenum-based metals, chromium, tantalum, and titanium. Good examples of such a combination include a chromium bottom film, an aluminum (alloy) top film, and an aluminum (alloy) bottom film and a molybdenum (alloy) top film. However, the gate conductors 121a, 121b, 122, 131, and 139 may be made of various other metals or conductors.

Side surfaces of the plurality of sensing scan lines 121, the plurality of horizontal sensing data lines 122a, the plurality of reference voltage lines 122b and 122c, the plurality of sustain electrode lines 131, and the plurality of island light blocking members 135-139 are substrates. It is preferably inclined with respect to the (110) plane and its inclination angle is about 30 ° to about 80 °.

On the plurality of sensing scan lines 121, the plurality of horizontal sensing data lines 122a, the plurality of vertical and horizontal reference voltage lines 122b and 122c, the plurality of sustain electrode lines 131, and the plurality of island light blocking members 135-139. A gate insulating layer 140 made of silicon nitride (SiNx) or silicon oxide (SiOx) is formed.

On the gate insulating layer 140, a plurality of linear semiconductors 151a, 151b, 151c and a plurality of island semiconductors made of hydrogenated amorphous silicon (amorphous silicon is abbreviated a-Si) or polysilicon, etc. 157 is formed.

The first and second linear semiconductors 151a and 151b mainly extend in the longitudinal direction and include a plurality of extensions 154a and 154b extending toward the gate electrodes 124a and 124b, respectively.

The first and second linear semiconductors 151a and 151b are bilaterally symmetrical with each other, and the first and second linear semiconductors 151a, for every three linear semiconductors 151a and 151b are arranged in a row direction. 151b are alternately formed. For example, although the first linear semiconductor 151a is formed on the left side and the second linear semiconductor 151b is formed on the right side of the third linear semiconductor 151c and the island-like semiconductor 157, the present invention is not limited thereto. Do not.

The third linear semiconductor 151c mainly extends in the longitudinal direction.

The island-like semiconductor 157 extends in the unit of pixel row sets mainly in the longitudinal direction, so that the length of the island-like semiconductor 157 is almost similar to that of the pixel row set, but does not exceed the length of the pixel row set.

 The third linear semiconductor 151c and the island-like semiconductor 157 have a substantially similar shape except for a portion, and have a width wider than that of the first and second linear semiconductors 151a and 151b.

The first to third linear semiconductors 151a-151c and the island type semiconductor 157 are adjacent to the scan lines 121a and 121b, the horizontal sensing data line 122a, the reference voltage lines 122b and 122c, and the storage electrode line 131. Wider, covering them wider.

A plurality of linear and island ohmic contacts 161a-161c, 165a-165b, and 167 are formed on the semiconductors 151a-151c and 157. The ohmic contacts 161a-161c, 165a-165b, and 167 may be made of a material such as n + hydrogenated amorphous silicon in which n-type impurities such as phosphorus are heavily doped or made of silicide. The linear ohmic contacts 161a and 161b are formed on the first and second linear semiconductor layers 151a and 151b, respectively, and have a plurality of protrusions 163a and 163b, respectively. The protrusions 163a and the islands of ohmic contact 165a are paired and disposed on the protrusions 154a of the semiconductor 151a. The protrusions 163b and the islands of ohmic contact 165b form a pair of semiconductors 151b. It is arrange | positioned on the protrusion part 154b.

The linear ohmic contact 161c is formed on the third linear semiconductor layer 151c.

The islanding ohmic contact 167 is formed on the island semiconductor 157.

Side surfaces of the semiconductors 151a-151c and 157 and the ohmic contacts 161a-161c, 165a-165b and 167 are also inclined with respect to the substrate 110 surface and have an inclination angle of about 30 ° to about 80 °.

The plurality of image data lines 171a and 171b, the plurality of vertical sensing data lines 172, and the plurality of drain electrodes are disposed on the ohmic contacts 161a-161c, 165a-165b, and 167 and the gate insulating layer 140. 175 and the plurality of capacitor electrode wirings 178 are formed.

The image data lines 171a and 171b transmit an image data signal and mainly extend in a vertical direction to intersect the image scan line 121, the horizontal sensing data line 122a, the reference voltage lines 122b and 122c, and the storage electrode line 131. . Each of the image data lines 171a and 171b has a plurality of light-shielding extensions that are wider in the vicinity of the intersections and cover them widely. Each of the image data lines 171a and 171b includes a plurality of source electrodes 173a and 173b extending toward the gate electrodes 124a and 124b, respectively.

The drain electrodes 175a and 175b are separated from the image data lines 171a and 171b, respectively, and face the source electrodes 173a and 173b around the gate electrodes 124a and 124b. Each drain electrode 175a, 175b includes one wide end 177a, 177b and the other end having a rod shape. The wide ends 177a and 177b overlap the sustain electrodes 134a and 134b, and the rod-shaped ends are partially surrounded by the bent source electrodes 173a and 173b.

One gate electrode 124a or 124b, one source electrode 173a or 173b, and one drain electrode 175a or 175b together with the protrusion 154a or 154b of the semiconductor 151a or 151b include one thin film transistor ( A thin film transistor (TFT) is formed, and a channel of the thin film transistor is formed in the protrusion 154a or 154b between the source electrode 173a or 173b and the drain electrodes 175a and 175b. This thin film transistor functions as the switching element Q.

The vertical sensing data line 172 transmits the sensing data signal Vp and mainly extends in the vertical direction to extend the image scanning line 121, the horizontal sensing data line 122a, the vertical and horizontal reference voltage lines 122b and 122c, and the storage electrode line ( 131). Each vertical sensing data line 172 includes a plurality of light shielding extensions that are widened in the vicinity of the intersections thereof and broadly cover them.

Each vertical sensing data line 172 overlaps the common electrode 270 of the common electrode display panel 200 to form a variable capacitor Cvx, and the protrusion 126b of the vertical reference voltage line 122b is a vertical sensing data line ( Overlap with 172 to form a reference capacitor (Cp _Y ).

The capacitor electrode wiring 178 extends mainly in the longitudinal direction, and has an island shape having a vertical length that is approximately the length of the pixel row set, and the maximum length of the capacitor electrode wiring 178 exceeds the length of the pixel row set. Not good. The image scan line 121, the horizontal sensing data line 122a, the reference voltage lines 122b and 122c, and the storage electrode line 131 intersect with each other. The capacitive electrode wiring 178 includes a plurality of light shielding expansion portions that have a wider width in the vicinity of the intersection thereof and cover them widely, so that the light shielding portions 133a-133c and the light shielding members 135-139 of the storage electrode line 131 are provided. ) And light leakage of portions not covered by the gate electrodes 124a and 124b.

The capacitor electrode wiring 178 overlaps with the common electrode 270 formed on the common electrode display panel 200 to form a variable capacitor Cv _Y , and the protrusion 126c of the horizontal reference voltage line 122c is a capacitor electrode wiring ( Overlap with 178 to form a reference capacitor Cp _Y.

The image data lines 171a and 171b, the plurality of vertical sensing data lines 172, the plurality of drain electrodes 175a and 175b, and the plurality of capacitor electrode wirings 178 are refractory such as molybdenum, chromium, tantalum and titanium. metal) or an alloy thereof, and may have a multilayer structure including a refractory metal film (not shown) and a low resistance conductive film (not shown). Examples of the multilayer structure include a double layer of chromium or molybdenum (alloy) lower layer and an aluminum (alloy) upper layer, and a triple layer of molybdenum (alloy) lower layer and aluminum (alloy) interlayer and molybdenum (alloy) upper layer. However, the image data lines 171a and 171b, the plurality of vertical sensing data lines 172, the plurality of drain electrodes 175, and the plurality of capacitor electrode lines 178 may be made of various other metals or conductors.

The image data lines 171a and 171b, the plurality of vertical sensing data lines 172, the plurality of drain electrodes 175a and 175b, and the plurality of capacitive electrode wirings 178 also have a side surface of the substrate 110 with 30 It is preferable to incline at an inclination angle of about 80 to 80 degrees.

In the case of a semi-transmissive liquid crystal display including a transparent electrode, a reflective electrode, and the like in addition to the thin film transistor array panel 100, the common electrode display panel 200, and the liquid crystal layer 3, the capacitor electrode wiring 178 may include a reflective electrode or a transparent electrode. It may be formed of the same material.

The ohmic contacts 161a-161c, 165a-165b, and 167 exist only between the semiconductors 151a-151c and 157 thereunder and the data conductors 171a, 171b, 172, 175a, 175b, and 178 thereover. It lowers the contact resistance.

In most places, the semiconductors 151a-151c and 157 are narrower than the image data lines 171a and 171b, the vertical sensing data line 172 and the capacitive electrode wiring 178, but as described above, the image scanning line 121 and the horizontal sensing are described. The image data lines 171a and 171b, the vertical sensing data line 172, and the width are widened at portions where they meet the data lines 122a, the reference voltage lines 122b and 122c, and the storage electrode lines 131 to smooth the profile of the surface. The sustain electrode line 131 is prevented from being disconnected. The semiconductors 151a-151c and 157 include the image data lines 171a and 171b, the vertical sensing data line 172, and the drain electrodes 175a and 175c as well as between the source electrodes 173a and 173b and the drain electrodes 175a and 175b. ) And a portion exposed by the capacitor electrode wiring 178. The ohmic contacts 161a-161c, 165a-165b, and 167 have the same planar shape as most of the semiconductors 151a-151c and 157 except for the exposed portions.

A passivation layer 180 is formed on the data conductors 171a, 171b, 172, 175a, 175b, and 178 and the exposed semiconductors 151a-151c and 157. The passivation layer 180 includes a lower layer 180p made of an inorganic insulator such as silicon nitride or silicon oxide and an upper layer 180q made of an organic insulator. The upper passivation layer 180q preferably has a dielectric constant of 4.0 or less, may have photosensitivity, and may provide a flat surface. However, the passivation layer 180 may have a single layer structure made of an inorganic insulator or an organic insulator.

The passivation layer 180 is formed with a plurality of first and second contact holes 185a and 185b exposing the drain electrodes 175a and 175b, respectively, and the passivation layer 180 and the gate insulating layer 140 are horizontally formed. A plurality of contact holes 188 is formed to expose the sense data line 122a.

A plurality of pixel electrodes 191a and 191b, a plurality of light blocking films 195, and a plurality of connection members 88 are formed on the passivation layer 180. They may be made of a transparent conductive material such as ITO or IZO or a reflective metal such as aluminum, silver, chromium or an alloy thereof.

The pixel electrodes 191a and 191b are physically and electrically connected to the first and second drain electrodes 175a and 175b through the contact holes 185a and 185b, respectively, and the first and second drain electrodes 175a and 175b. Is applied to each of the image data voltages. Each of the pixel electrodes 191a and 191b to which the image data voltage is applied generates two electric fields by generating an electric field together with the common electrode 270 of the common electrode display panel 200 to which the common voltage Vcom is applied. , The direction of the liquid crystal molecules of the liquid crystal layer 3 between 270 is determined. The polarization of light passing through the liquid crystal layer 3 varies according to the direction of the liquid crystal molecules determined as described above. Each pixel electrode 191a and 191b and the common electrode 270 form a liquid crystal capacitor Clc to maintain an applied voltage even after the thin film transistor is turned off.

The wide ends 177a and 177b of each pixel electrode 191a and 191b and the first and second drain electrodes 175a and 175b connected thereto respectively overlap the storage electrodes 134a and 134b to form the storage capacitor Cst. The holding capacitor Cst enhances the voltage holding capability of the liquid crystal capacitor Clc.

The pixel electrodes 191a and 191b overlap with the image scanning line 121, the image data lines 171a and 171b, the horizontal sensing data line 122a, the reference voltage lines 122b and 122c, and the vertical sensing data line 172. While increasing the aperture ratio, it may not overlap.

The light blocking layer 195 includes a pixel electrode positioned on the right side of the light blocking layer 195 that is not covered by the light shielding extension formed on the image data lines 171a and 171b in a portion where two image data lines 171a and 171b are formed successively. 191b) to prevent light leakage.

The connecting member 88 connects the capacitive electrode wiring 178 and the horizontal sensing data line 122a through the contact hole 188.

Further, a plurality of light blocking vertical lines (not shown) may be formed on the passivation layer 180, and they are made of an opaque metal such as aluminum, silver, chromium, or an alloy thereof. However, the light blocking vertical line may have a double film structure of an upper film (not shown) such as aluminum, silver, or an alloy thereof, and a lower film (not shown) such as ITO or IZO. Alternatively, the light blocking vertical line may have a triple layer structure of an intermediate layer (not shown) having good contact properties with ITO or IZO such as molybdenum-based metal, chromium, tantalum, and titanium together with the upper layer and the lower layer.

The light blocking vertical line prevents light leakage and mainly extends in the vertical direction. The light blocking vertical line may be disposed on two adjacent image data lines 171a and 171b or may be disposed on a portion where the sensing data line 172 and the capacitor electrode wiring 178 are formed, and the extension portion 154a of the semiconductors 151a and 151b may be disposed. , 154b) and the like may include an extension.

Next, the common electrode display panel 200 will be described.

A plurality of light blocking horizontal lines 220 such as a black matrix to prevent light leakage are formed on an insulating substrate 210 made of transparent glass, plastic, or the like. The light blocking horizontal line 220 mainly faces the image scanning line 121a and the storage electrode line 131, and protrudes toward the image data lines 171a and 171b and the first and second drain electrodes 175a and 175b. Have

 The light blocking horizontal line 220 extends light blocking formed on the light blocking portions 133a-133c, the light blocking members 135-139, the gate electrodes 124a and 124b, and the image data lines 171a and 171b of the storage electrode line 131. And light leakage of a portion that is not covered by the light-shielding extension formed in the vertical sensing data line 172 and the light-shielding extension formed in the capacitor electrode wiring 178, and the pixel electrodes 191a and 191b. Light leakage between can be prevented completely.

In the conventional liquid crystal display, a black matrix extending in the horizontal and vertical directions is formed on the common electrode display panel to prevent light leakage between the pixel electrodes. However, due to the alignment error between the thin film transistor array panel and the common electrode display panel, it is necessary to widen the width of the black matrix, and thus, the aperture ratio of the pixel is inevitably decreased. However, when the light blocking horizontal line 220 or the like is used as in the embodiment of the present invention, light leakage between the pixels can be prevented, thereby reducing the aperture ratio of the pixels generated by using the conventional black matrix.

A plurality of color filters 230, each representing one of three primary colors, are formed on the substrate 210 and the light blocking horizontal line 220. Each color filter 230 is disposed in a region corresponding to the pixel electrodes 191a and 191b. The color filters 230 arranged in the vertical direction may be connected to each other to form a band.

Two color filters 230 representing different colors are overlapped in a region in which one image data line 171a or 171b is disposed between the pixel electrodes 191a and 191b adjacent to each other in the row direction. In an area where two image data lines 171a and 171b are immediately adjacent between adjacent pixel electrodes 191a and 191b and an area where the vertical sensing data line 172 and the capacitor electrode wiring 178 are formed. The color filters 230 are separated without overlapping.

A common electrode 270 made of a transparent conductive material such as ITO or IZO is formed on the color filter 230 and the light blocking horizontal line 220.

Polarizers (not shown) for polarizing light are attached to an outer surface of at least one of the two display panels 100 and 200 of the liquid crystal panel assembly 300.

Meanwhile, in the exemplary embodiment of the present invention, the liquid crystal display device is described as a display device, but the present invention is not limited thereto, and the present invention is not limited thereto, and a flat panel display device such as a plasma display device and an organic light emitting display device may be used. The same can be applied.

According to the present invention, the transmittance can be increased by increasing the transmission region of the pixel by disposing the sensing unit between the pixels and not using the conventional black matrix.

In addition, the interference between the image data signal and the sensing data signal may be reduced by disposing the image data line and the sensing data line as far as possible.

In addition, the horizontal sensing data line is formed together with the image scanning line and the like, and the capacitive electrode wiring connected to the horizontal sensing data line is formed to be long in the vertical direction together with the image data line and the drain electrode to reduce the decrease of the aperture ratio due to the sensing unit.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (17)

Display, A plurality of pixels formed on the display panel; A plurality of image data lines which transmit an image data signal to the pixel and extend in a first direction, A plurality of image scanning lines which transmit an image scanning signal to the pixel and extend in a second direction, A plurality of first sensing data lines transferring a first sensing data signal and extending in the first direction; A plurality of second sensing data lines which transmit a second sensing data signal and extend in the second direction; A plurality of first reference voltage lines receiving a first reference voltage and extending in the second direction, A plurality of second reference voltage lines receiving a second reference voltage and extending in the second direction, and A plurality of island type capacitor electrode wires connected to the second sensing data line and extending in the first direction Display device comprising a. In claim 1, The first sensing data line is formed on a different layer from the second sensing data line. In claim 2, And the capacitor electrode wiring is formed on the same layer as the first sensing data line. In claim 3, And the capacitor electrode wirings are formed in pixel row aggregation units. In claim 4, The length of the capacitor electrode wirings does not exceed the vertical length of the pixel row set. In claim 1, And each of the first reference voltage lines includes a plurality of protrusions. In claim 6, And each of the second reference voltage lines includes a plurality of protrusions. In claim 7, The area of the protrusion of the second reference voltage line is larger than the area of the protrusion of the first reference voltage line. In claim 8, The area of the protrusion of the second reference voltage line is twice the area of the protrusion of the first reference voltage line. In claim 7, The number of the first reference voltage lines is greater than the number of the second reference voltage lines. In claim 10, The number of the first reference voltage lines is twice the number of the second reference voltage lines. In claim 11, And the pixels are arranged in opposite directions with respect to the first sensing data line or the capacitive electrode wiring and connected to an image data line. In claim 12, A display device of which the arrangement position of the image data line is changed in units of dots. In claim 12, Pixels arranged in the same column are connected to data lines arranged in the same direction. In claim 1, It further comprises a plurality of contacts, And the second sensing data line is connected to the capacitor electrode wiring through the contact portion. The method of claim 15, Each of the pixels includes a switching element connected to the image scanning line and the image data line, and a pixel electrode connected to the switching element, And the contact portion is made of the same material as the pixel electrode. In claim 1, The first and second reference voltages are the same.

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