KR101995368B1 - Thin film transistor array panel and liquid crystal display device including the same - Google Patents
Thin film transistor array panel and liquid crystal display device including the same Download PDFInfo
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- KR101995368B1 KR101995368B1 KR1020120025560A KR20120025560A KR101995368B1 KR 101995368 B1 KR101995368 B1 KR 101995368B1 KR 1020120025560 A KR1020120025560 A KR 1020120025560A KR 20120025560 A KR20120025560 A KR 20120025560A KR 101995368 B1 KR101995368 B1 KR 101995368B1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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Abstract
The present invention relates to a thin film transistor array panel and a liquid crystal display including the same, which can stably drive the liquid crystal to prevent the generation of foreground lines and improve transmittance. The thin film transistor array panel according to an embodiment of the present invention includes a substrate; A dummy electrode formed on the substrate; A first insulating layer formed on the dummy electrode; And a first pixel electrode and a second pixel electrode which are formed to face each other on the insulating layer.
Description
The present invention relates to a thin film transistor array panel and a liquid crystal display including the same. More particularly, a thin film transistor array panel and a liquid crystal display including the same may be used to stably drive a liquid crystal to prevent generation of foreground lines and to improve transmittance. It is about.
The liquid crystal display is one of the most widely used flat panel display devices. The liquid crystal display includes two display panels on which field generating electrodes such as a pixel electrode and a common electrode are formed, and a liquid crystal layer interposed therebetween. It generates an electric field in the liquid crystal layer to determine the orientation of the liquid crystal molecules of the liquid crystal layer and to control the polarization of the incident light to display an image.
The liquid crystal display also includes a switching element connected to each pixel electrode and a plurality of signal lines such as a gate line and a data line for controlling the switching element and applying a voltage to the pixel electrode.
The liquid crystal display is classified into various modes according to a driving method, and among them, a liquid crystal display having a vertically aligned mode in which a long axis of the liquid crystal molecules is arranged perpendicular to the display panel without an electric field applied thereto. The contrast ratio is high and the reference viewing angle is wide.
In the vertically aligned liquid crystal display, when two electrodes are applied to different pixels in one pixel on the same substrate, the liquid crystal is unstable at the center between the two electrodes, resulting in a foreground line. There is a problem.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a thin film transistor array panel capable of stably driving liquid crystals and a liquid crystal display device including the same.
Another object of the present invention is to provide a thin film transistor array panel capable of preventing the generation of foreground lines and improving transmittance and a liquid crystal display including the same.
According to the above object, a thin film transistor array panel according to an embodiment of the present invention includes a substrate; A dummy electrode formed on the substrate; An insulating layer formed on the dummy electrode; And a first pixel electrode and a second pixel electrode which are formed to face each other on the insulating layer.
The dummy electrode may include a first dummy electrode formed under the first pixel electrode; And a second dummy electrode formed under the second pixel electrode, wherein the first dummy electrode and the second dummy electrode are spaced apart from each other.
A thin film transistor array panel according to an exemplary embodiment of the present invention includes a gate line formed on the substrate to transfer a gate signal; A voltage transfer line formed on the substrate to transfer a first pixel voltage; A data line formed on the substrate to transfer a second pixel voltage; A dummy line formed on the substrate to transfer an auxiliary voltage; A first thin film transistor connected to the gate line and the voltage transfer line; And a second thin film transistor connected to the gate line and the data line, wherein the first pixel electrode is connected to the first thin film transistor, and the second pixel electrode is connected to the second thin film transistor. The first and second dummy electrodes may be connected to the dummy line.
The first pixel voltage and the second pixel voltage may have the same magnitude and opposite polarities.
The auxiliary voltage may swing positively and negatively every frame.
When the auxiliary voltage is the positive polarity, it may be 1V or more and 7V or less.
When the auxiliary voltage is negative, the auxiliary voltage may be -7V or more and -1V or less.
The width of the first dummy electrode may be wider than the width of the first pixel electrode, and the width of the second dummy electrode may be wider than the width of the second pixel electrode.
The gate line and the data line may cross each other to define a pixel area, and the first and second pixel electrodes may be formed in the pixel area.
The pixel area includes a first subpixel area and a second subpixel area, and an interval between the first and second pixel electrodes formed in the first subpixel area is formed in the second subpixel area. The distance between the first and second pixel electrodes may be different.
The auxiliary voltage may be a voltage of a constant magnitude.
The difference between the first pixel voltage and the auxiliary voltage may be greater than or equal to -7.5V and less than or equal to 0V.
The difference between the second pixel voltage and the auxiliary voltage may be 7.5V or more and 15V or less.
Widths of the first and second pixel electrodes may be 2 μm or less.
Widths of the first and second pixel electrodes may be 0.2 μm or less.
The width of the first pixel electrode may be less than or equal to the width of the first dummy electrode.
The width of the second pixel electrode may be less than or equal to the width of the second dummy electrode.
The first pixel voltage may be greater than or equal to −4 V and less than or equal to −2 V, and the maximum value of the second pixel voltage may be greater than or equal to 11 V and less than or equal to 13 V.
A second insulating layer is formed between the substrate and the dummy electrode. The dielectric constant of the first insulating layer may be greater than or equal to the dielectric constant of the second insulating layer.
The display device may further include a third insulating layer formed on the first and second pixel electrodes, and the dielectric constant of the third insulating layer may be greater than or equal to the dielectric constant of the first insulating layer.
The first and second dummy electrodes may be floating.
A thin film transistor array panel according to an exemplary embodiment of the present invention includes a gate line formed on the substrate to transfer a gate signal; A voltage transfer line formed on the substrate to transfer a first pixel voltage; A data line formed on the substrate to transfer a second pixel voltage; A dummy line formed on the substrate to transfer an auxiliary voltage; A first thin film transistor connected to the gate line and the voltage transfer line; And a second thin film transistor connected to the gate line and the data line, wherein the first pixel electrode is connected to the first thin film transistor, and the second pixel electrode is connected to the second thin film transistor. The dummy electrode may be connected to the dummy line.
The gate line and the data line may cross each other to define a pixel area, and the dummy electrode may be formed in the entire pixel area.
The first and second pixel voltages, the auxiliary voltage
(Vd1: first pixel voltage, Vd2: second pixel voltage, Va: auxiliary voltage).According to an aspect of the present invention, a thin film transistor array panel includes a first substrate and a second substrate facing each other; A gate line formed on the first substrate to transfer a gate signal; A voltage transfer line formed on the first substrate to transfer a first pixel voltage; A data line formed on the first substrate to transfer a second pixel voltage; A dummy line formed on the first substrate to transfer an auxiliary voltage; A first thin film transistor connected to the gate line and the voltage transfer line; A second thin film transistor connected to the gate line and the data line; A first pixel electrode connected to the first thin film transistor; A second pixel electrode connected to the second thin film transistor so as to face the first pixel electrode; A dummy electrode connected to the dummy line and formed under the first and second pixel electrodes; And a liquid crystal layer formed between the first substrate and the second substrate, having a positive dielectric anisotropy and vertically aligned.
The first pixel voltage and the second pixel voltage have the same magnitude, opposite polarities, and the auxiliary voltage swings positively and negatively every frame, and is 1V or more when the auxiliary voltage is positive. , 7V or less, and when the auxiliary voltage is negative, -7V or more and -1V or less.
The auxiliary voltage may be a voltage having a constant magnitude, and the difference between the first pixel voltage and the auxiliary voltage is greater than or equal to -7.5V and less than or equal to 0V, and the difference between the second pixel voltage and the auxiliary voltage is greater than or equal to 7.5V and less than or equal to 15V. have.
The thin film transistor array panel and the liquid crystal display including the same according to the exemplary embodiment of the present invention as described above have the following effects.
A thin film transistor array panel and a liquid crystal display including the same according to an exemplary embodiment of the present invention form a dummy electrode under a first pixel electrode and a second pixel electrode, thereby forming a thin film at a central portion between the first pixel electrode and the second pixel electrode. There is an effect that can prevent the liquid crystal is driven unstable.
In addition, the thin film transistor array panel and the liquid crystal display including the same according to an exemplary embodiment of the present invention limit the range of the auxiliary voltage or the relationship between the auxiliary voltage and the first and second pixel voltages, thereby preventing the generation of foreground lines and transmitting the transmittance. There is an effect to improve.
1 is a block diagram of a liquid crystal display according to an exemplary embodiment of the present invention.
2 is an equivalent circuit diagram illustrating one pixel together with the structure of a liquid crystal display according to an exemplary embodiment of the present invention.
3 is a schematic cross-sectional view of a liquid crystal display according to an exemplary embodiment of the present invention.
4 is a layout view illustrating one pixel of the liquid crystal display according to the first exemplary embodiment of the present invention.
FIG. 5 is a cross-sectional view illustrating one pixel of the liquid crystal display according to the first exemplary embodiment of the present invention, taken along the line VV of FIG. 4.
6 is a layout view illustrating one pixel of the liquid crystal display according to the second exemplary embodiment of the present invention.
7 is a layout view illustrating one pixel of the liquid crystal display according to the third exemplary embodiment of the present invention.
8 is a cross-sectional view illustrating one pixel of the liquid crystal display according to the third exemplary embodiment of the present invention, taken along the line VIII-VIII of FIG. 7.
Hereinafter, exemplary 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. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.
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.
First, a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.
1 is a block diagram of a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is an equivalent circuit diagram illustrating one pixel together with the structure of the liquid crystal display according to an exemplary embodiment of the present invention.
Referring to FIG. 1, a liquid crystal display according to an exemplary embodiment of the present invention includes a liquid
The liquid
The plurality of signal lines includes a plurality of gate lines for transmitting a gate signal (also referred to as a "scan signal"), a plurality of data lines for transmitting a data signal, and a voltage transmission line for transmitting a constant voltage or a swinging voltage. The gate lines extend approximately in the row direction and are substantially parallel to each other, and the data lines and the voltage transfer lines extend substantially in the column direction and are substantially parallel to each other.
Referring to FIG. 2, each pixel PX includes a liquid crystal capacitor Clc. The liquid crystal capacitor Clc includes a first pixel electrode PEa and a second pixel electrode PEb of the
The
The pixel electrode PE including the first and second pixel electrodes PEa and PEb may be formed on different layers or on the same layer.
In the first and second storage capacitors Csta and Cstb, which serve as an auxiliary role of the liquid crystal capacitor Clc, a separate electrode (not shown) provided in the
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, or yellow, cyan, magenta, and the like. In addition, each pixel may further display a mixed color of the primary colors or white in addition to the primary colors. 2 illustrates a color filter CF in which each pixel PX represents one of the primary colors in an area of the
The liquid
Next, the driving method of the liquid crystal display according to the exemplary embodiment of the present invention will be described with reference to FIGS. 1 and 2 along with FIG. 3.
3 is a schematic cross-sectional view of a liquid crystal display according to an exemplary embodiment of the present invention.
Referring to FIG. 3, a data voltage may be applied to one of the first pixel electrode PEa and the second pixel electrode PEb, and a predetermined voltage or two swinging voltages may be alternately applied to the other. Alternatively, two voltages having the same size and opposite polarities may be applied to the first pixel electrode PEa and the second pixel electrode PEb.
The difference between the two voltages applied to the first pixel electrode PEa and the second pixel electrode PEb is represented as the charging voltage of the liquid crystal capacitor Clc, that is, the pixel voltage. When a potential difference occurs between both ends of the liquid crystal capacitor Clc, as shown in FIG. 3, an electric field parallel to the surfaces of the two
When the liquid crystal molecules 31 have positive dielectric anisotropy, the liquid crystal molecules 31 are inclined such that their major axis is parallel to the direction of the electric field, and the degree of inclination depends on the magnitude of the pixel voltage. This
Hereinafter, a liquid crystal display according to a first exemplary embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 4 is a layout view of one pixel of the liquid crystal display according to the first exemplary embodiment of the present invention, and FIG. 5 is a view of one pixel of the liquid crystal display according to the first exemplary embodiment of the present invention shown along the line VV of FIG. It is sectional drawing shown.
The liquid crystal display according to the first exemplary embodiment of the present invention includes a
The
The
Although not shown, a storage electrode line and a storage electrode protruding from the storage electrode line may be further formed on the same layer as the
A
A
A pair of first
The
The first pixel voltage may be a voltage having a constant magnitude or a swinging voltage, and the second pixel voltage may be a data voltage. Alternatively, the first pixel voltage and the second pixel electrode may be two voltages having the same magnitude and opposite polarities.
Although not shown, the liquid crystal display according to the present exemplary embodiment may include a plurality of pixels, and the
The
A
The
The
A second insulating
The
The
The first insulating
The
A
The first and
The
Referring to Table 1 below, the narrower the width of the
Table 1 shows the transmittance according to the width of the first and
The transmittance can be greatly improved by setting the width of the first and
However, in consideration of process difficulties in implementing the first and
That is, the widths of the first and
The width of the first and
Next, referring to Table 2, it can be seen that the transmittance becomes higher when the widths of the first and
Table 2 shows the transmittance according to the ratio of the widths of the first and
The smaller the ratio of the widths of the first and
In the description of Tables 1 and 2 above, the width of the
The first and
Since the
The first pixel voltage and the second pixel voltage may be voltages having the same magnitude and opposite polarities. For example, when the first pixel voltage is 7.5V, the second pixel voltage is -7.5V, and when the first pixel voltage is -7.5V, the second pixel voltage may be 7.5V.
In this case, an auxiliary voltage is applied to the
In contrast, the first pixel voltage may be a voltage having a constant magnitude or a swinging voltage, and the second pixel voltage may be a data voltage. For example, when the first pixel voltage is -3V, the second pixel voltage is 12V, and when the first pixel voltage is 3V, the second pixel voltage may be -12V.
Referring to Table 3 below, it can be seen that the transmittance changes according to the setting of the first pixel voltage and the second pixel voltage.
Table 3 is a table showing transmittance according to the first and second pixel voltages. The relative transmittance when the first pixel voltage is -7.5V and the second pixel voltage is 7.5V is shown as 100%. The second pixel voltage is a value representing a white gray level in a normally black mode, and a different voltage may be used according to the gray level to be displayed.
The transmittance is high when the first pixel voltage has a value between -4V and -2V, and the second pixel voltage has a value between 11V and 13V. Therefore, it is preferable that the first pixel voltage is at least -4V and has a value of at most -2V, and the maximum value of the second pixel voltage is at least 11V and at most 13V.
In this case, the auxiliary voltage may be a voltage of a constant magnitude. The difference between the first pixel voltage and the auxiliary voltage is greater than or equal to -7.5 V and less than or equal to 0 V, and the difference between the second pixel voltage and the auxiliary voltage is greater than or equal to 7.5 V and less than or equal to 15 V is most advantageous to improve the transmittance.
In FIGS. 4 and 5, the plurality of
For example, one pixel area may include a first subpixel area and a second subpixel area. The distance between the
A third insulating
Referring to Tables 3 and 4 below, the ratio of the dielectric constant of the first insulating
Table 3 is a table showing the transmittance according to the ratio of the dielectric constant of the third insulating
Table 4 is a table showing the transmittance according to the ratio of the dielectric constant of the first insulating
As shown in Table 3, the larger the ratio of the dielectric constant of the third insulating
As shown in Table 4, as the ratio of the dielectric constant of the first insulating
Although not illustrated, a lower alignment layer may be applied to an inner surface of the
The
The
The
The
An
Although not illustrated, an upper alignment layer may be coated on an inner surface of the
Although not shown, polarizers may be provided on the outer surfaces of the lower and
The
When voltages having different magnitudes are applied to the
Using the vertically aligned liquid crystal molecules 31 may increase the contrast ratio of the liquid crystal display and implement a wide viewing angle. In addition, the liquid crystal molecule 31 having positive dielectric anisotropy has a high dielectric constant anisotropy and a low rotational viscosity compared to the liquid crystal molecule having negative dielectric anisotropy, thereby obtaining a fast response speed.
Hereinafter, a liquid crystal display according to a second exemplary embodiment of the present invention will be described with reference to the accompanying drawings.
The liquid crystal display according to the second embodiment is substantially the same as the liquid crystal display according to the first embodiment, and there is a difference in some portions. In this case, the biggest difference is that no dummy line is formed and no auxiliary voltage is applied, which will be described in more detail below.
6 is a layout view illustrating one pixel of the liquid crystal display according to the second exemplary embodiment of the present invention. A cross-sectional view of one pixel of the liquid crystal display according to the second exemplary embodiment of the present invention is similar to that of the first exemplary embodiment.
The liquid crystal display according to the second exemplary embodiment of the present invention includes a
The
Since a separate dummy line is not formed and the plurality of
In this case, the same effect as the predetermined voltage is applied to the
Accordingly, the thickness of the first insulating
Hereinafter, a liquid crystal display according to a third exemplary embodiment of the present invention will be described with reference to the accompanying drawings.
The liquid crystal display according to the third embodiment is substantially the same as the liquid crystal display according to the first embodiment, and there is a difference in some portions. In this case, the biggest difference is that the dummy electrode is formed in the entire pixel area, which will be described in more detail below.
FIG. 7 is a layout view illustrating one pixel of the liquid crystal display according to the third exemplary embodiment of the present invention, and FIG. 8 is a view of the liquid crystal display according to the third exemplary embodiment of the present invention shown along the line VIII-VIII of FIG. 7. It is sectional drawing which showed the pixel.
The liquid crystal display according to the third exemplary embodiment of the present invention includes a
The
The
The
In this case, the first pixel voltage, the second pixel voltage, and the auxiliary voltage satisfying the condition of Equation 1 below are most advantageous for improving the transmittance.
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.
3: liquid crystal layer 31: liquid crystal molecules
100: lower display panel 110: first substrate
121:
124b: second gate electrode 140: gate insulating film
154a:
163a and 165a: first
170: voltage transmission line 171: data line
173a:
175a:
180: second insulating layer 181: dummy line
182:
182b: second dummy electrode 184: first insulating layer
185a:
191a:
200: upper display panel 210: second substrate
220: light blocking member 230: color filter
250: overcoat 300: liquid crystal panel assembly
400: gate driver 500: data driver
800: gray voltage generator 600: signal controller
TFT1: first thin film transistor TFT2: second thin film transistor
Claims (27)
A dummy electrode formed on the substrate;
A first insulating layer formed on the dummy electrode; And
A first pixel electrode and a second pixel electrode formed to face each other on the first insulating layer;
The first pixel electrode and the second pixel electrode are located on the same layer,
The first pixel electrode receives a first pixel voltage, the second pixel electrode receives a second pixel voltage,
Generate an electric field parallel to the substrate by a potential difference between the first pixel voltage and the second pixel voltage,
The dummy electrode,
A first dummy electrode disposed below the first pixel electrode; And
A second dummy electrode positioned below the second pixel electrode;
The first dummy electrode, the second dummy electrode, the first pixel electrode and the second pixel electrode have an elongated bar shape.
The first dummy electrode and the second dummy electrode are spaced apart from each other,
The width of the first pixel electrode is less than or equal to the width of the first dummy electrode,
The width of the second pixel electrode is less than or equal to the width of the second dummy electrode,
Thin film transistor display panel.
A gate line formed on the substrate to transfer a gate signal;
A voltage transfer line formed on the substrate to transfer the first pixel voltage;
A data line formed on the substrate to transfer the second pixel voltage;
A dummy line formed on the substrate to transfer an auxiliary voltage;
A first thin film transistor connected to the gate line and the voltage transfer line; And
A second thin film transistor connected to the gate line and the data line;
The first pixel electrode is connected to the first thin film transistor,
The second pixel electrode is connected to the second thin film transistor,
The first and second dummy electrodes are connected to the dummy line,
Thin film transistor display panel.
Wherein the first pixel voltage and the second pixel voltage have the same magnitude and opposite polarities.
Thin film transistor display panel.
The auxiliary voltage swings positively and negatively every frame,
Thin film transistor display panel.
1 V or more and 7 V or less when the auxiliary voltage is positive
Thin film transistor display panel.
When the auxiliary voltage is the negative polarity is -7V or more, -1V or less,
Thin film transistor display panel.
The gate line and the data line cross each other to define a pixel area;
Wherein the first and second pixel electrodes are formed in the pixel region,
Thin film transistor display panel.
The pixel area includes a first subpixel area and a second subpixel area,
The spacing between the first and second pixel electrodes formed in the first subpixel region is different from the spacing between the first and second pixel electrodes formed in the second subpixel region,
Thin film transistor display panel.
The auxiliary voltage is a voltage of a constant magnitude,
Thin film transistor display panel.
The difference between the first pixel voltage and the auxiliary voltage is greater than or equal to -7.5 V and less than or equal to 0 V,
Thin film transistor display panel.
The difference between the second pixel voltage and the auxiliary voltage is greater than 7.5V, less than 15V,
Thin film transistor display panel.
The width of the first and second pixel electrodes is less than 2um,
Thin film transistor display panel.
The width of the first and second pixel electrodes is 0.2um or less,
Thin film transistor display panel.
The first pixel voltage is greater than or equal to −4 V and less than or equal to −2 V,
The maximum value of the second pixel voltage is 11V or more and 13V or less,
Thin film transistor display panel.
Further comprising a second insulating layer formed between the substrate and the dummy electrode,
The dielectric constant of the first insulating layer is greater than or equal to the dielectric constant of the second insulating layer,
Thin film transistor display panel.
And a third insulating layer formed on the first and second pixel electrodes.
The dielectric constant of the third insulating layer is greater than or equal to the dielectric constant of the first insulating layer,
Thin film transistor display panel.
The first and second dummy electrodes are floated and do not receive a voltage.
Thin film transistor display panel.
A gate line formed on the substrate to transfer a gate signal;
A voltage transfer line formed on the substrate to transfer the first pixel voltage;
A data line formed on the substrate to transfer the second pixel voltage;
A dummy line formed on the substrate to transfer an auxiliary voltage;
A first thin film transistor connected to the gate line and the voltage transfer line; And,
A second thin film transistor connected to the gate line and the data line;
The first pixel electrode is connected to the first thin film transistor,
The second pixel electrode is connected to the second thin film transistor,
The dummy electrode is connected to the dummy line,
Thin film transistor display panel.
The gate line and the data line cross each other to define a pixel area;
The dummy electrode is formed in the entire pixel region,
Thin film transistor display panel.
The first and second pixel voltages, the auxiliary voltage
(Vd1: first pixel voltage, Vd2: second pixel voltage, Va: auxiliary voltage)
Satisfying,
Thin film transistor display panel.
A gate line formed on the first substrate to transfer a gate signal;
A voltage transfer line formed on the first substrate to transfer a first pixel voltage;
A data line formed on the first substrate to transfer a second pixel voltage;
A dummy line formed on the first substrate to transfer an auxiliary voltage;
A first thin film transistor connected to the gate line and the voltage transfer line;
A second thin film transistor connected to the gate line and the data line;
A first pixel electrode connected to the first thin film transistor and receiving the first pixel voltage;
A second pixel electrode connected to the second thin film transistor to receive the second pixel voltage;
A dummy electrode connected to the dummy line and formed under the first and second pixel electrodes; And
A liquid crystal layer formed between the first substrate and the second substrate and vertically aligned;
The first pixel electrode and the second pixel electrode are located on the same layer,
Generate an electric field parallel to the substrate by a potential difference between the first pixel voltage and the second pixel voltage,
The dummy electrode,
A first dummy electrode disposed below the first pixel electrode; And
A second dummy electrode positioned below the second pixel electrode;
The first dummy electrode, the second dummy electrode, the first pixel electrode and the second pixel electrode have an elongated bar shape.
The first dummy electrode and the second dummy electrode are spaced apart from each other,
The width of the first pixel electrode is less than or equal to the width of the first dummy electrode,
The width of the second pixel electrode is less than or equal to the width of the second dummy electrode,
The liquid crystal molecules of the liquid crystal layer have positive dielectric anisotropy, and the long axes of the liquid crystal molecules are inclined to be parallel to the electric field direction.
Liquid crystal display.
The first pixel voltage and the second pixel voltage have the same magnitude and opposite polarities,
The auxiliary voltage swings positively and negatively every frame,
1 V or more and 7 V or less when the auxiliary voltage is positive
When the auxiliary voltage is the negative polarity is -7V or more, -1V or less,
Liquid crystal display.
The auxiliary voltage is a voltage of a constant magnitude,
The difference between the first pixel voltage and the auxiliary voltage is -7.5 V or more, 0 V or less,
The difference between the second pixel voltage and the auxiliary voltage is greater than 7.5V, less than 15V,
Liquid crystal display.
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KR1020120025560A KR101995368B1 (en) | 2012-03-13 | 2012-03-13 | Thin film transistor array panel and liquid crystal display device including the same |
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KR1020120025560A KR101995368B1 (en) | 2012-03-13 | 2012-03-13 | Thin film transistor array panel and liquid crystal display device including the same |
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KR20130104223A KR20130104223A (en) | 2013-09-25 |
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US20060187368A1 (en) * | 2005-02-24 | 2006-08-24 | In-Woo Kim | Array substrate, method of manufacturing the same, display panel having the same, and liquid crystal display apparatus having the same |
US20100053484A1 (en) * | 2008-09-04 | 2010-03-04 | Hitachi Displays, Ltd. | Liquid crystal display device |
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US20060187368A1 (en) * | 2005-02-24 | 2006-08-24 | In-Woo Kim | Array substrate, method of manufacturing the same, display panel having the same, and liquid crystal display apparatus having the same |
US20100053484A1 (en) * | 2008-09-04 | 2010-03-04 | Hitachi Displays, Ltd. | Liquid crystal display device |
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