KR20110018801A - Display device - Google Patents

Abstract

PURPOSE: A display device is provided to divide a screen into an effective display area, an external display area, and a non-display area and uses a plurality of exchange gate wires and operating electrode according to the areas. CONSTITUTION: A display device is comprised of an effective display area(ADR), an external display area(ODR), and a non display area(NDR). The effective display area is comprised of a plurality of pixel areas. The external display area of the effective display area which is operated by be comprised into one. The non display area includes a display panel of the external display area. Moreover, a backlight assembly is arranged under the display panel and each pixel area of the effective area is comprised of a transmission area and a reflective area. An operating electrode of the external display area is includes in the display area. A pixel electrode of the effective display area is included in the display area. At this time, the external electrode and the pixel electrode is arranged on the same layer. The display panel defines a plurality of gate wires and pixel areas which is expanded to the first direction and includes a plurality of data wireless expanded to the second direction. The first and the third external operating electrode are arranged on the same layer with the gate wires and the second and the fourth external operating electrodes are arranged on the same layer with the data wires. The gate wires and the data wires are separated through a gate insulation layer.

Description

Display device {DISPLAY DEVICE}

An embodiment relates to a display device.

As information processing technology develops, display devices such as LCD, AMOLED and PDP are being used.

Among these display devices, the LCD does not emit light by itself, but changes the optical characteristics of the liquid crystal to display an image using ambient light or back light.

In addition, display devices such as AMOLED and PDP may emit light and display an image.

The embodiment improves an area in which an image is displayed and provides a display device that is easily driven.

According to an exemplary embodiment, a display device includes a valid display area including a plurality of pixel areas; An outer display area surrounding the effective display area and integrally driven; And a non-display area surrounding the periphery of the outer display area.

In an exemplary embodiment, a display device includes a plurality of gate lines; A plurality of data lines crossing the gate lines and defining a plurality of pixel areas; And an outer driving electrode surrounding the effective display area including the pixel areas.

Since the display device according to the embodiment includes not only an effective display area but also an outer display area, an area in which an image is displayed can be improved. That is, a user using the display device according to the embodiment may recognize that the screen is wider as the outer display area.

In addition, since the outer display area is integrally driven, the display device according to the exemplary embodiment may be easily driven while having a wide screen. That is, when the outer display area is displayed with a background having a predetermined color, the outer display area may display an image by the common electrode and one outer driving electrode.

Therefore, the outer display area may display an image in the background using one outer driving electrode.

In addition, the outer driving electrode may be formed like a pixel electrode, a gate wiring, or a data wiring. That is, the outer driving electrode may be formed of the same layer as the material of the pixel electrode, the gate wiring, or the data wiring.

Therefore, in order to form the outer display area, no additional process is required, and the display device according to the embodiment can be easily formed.

In the description of the embodiments, it is described that each substrate, layer, region, wiring, or electrode is formed on or under the "on" of each substrate, layer, region, wiring, or electrode, etc. In the case, “on” and “under” include both being formed “directly” or “indirectly” through other components. In addition, the upper or lower reference of each component is described with reference to the drawings. The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.

1 is a plan view illustrating a liquid crystal display according to an embodiment. 2 is a plan view illustrating an outer driving electrode. However, the position of the driver IC in FIG. 2 does not mean a physical position. 3 is a circuit diagram illustrating a liquid crystal display according to an embodiment. 4 is a cross-sectional view illustrating a cross section taken along line AA ′ in FIG. 1.

1 to 4, the liquid crystal display according to the embodiment includes a liquid crystal panel 10 and a driver IC 20.

The liquid crystal panel 10 is a display panel displaying an image. The liquid crystal panel 10 has a plate shape. As illustrated in FIG. 1, the liquid crystal panel 10 is divided into an effective display area ADR, an outer display area ODR, and a non-display area NDR. That is, the liquid crystal panel 10 includes the effective display area ADR, the outer display area ODR, and the non-display area NDR.

The effective display area ADR is positioned at the center of the liquid crystal panel 10. The effective display area ADR may have a rectangular shape, for example. The effective display area ADR includes a plurality of pixel areas P. FIG. The effective display area ADR displays an image by each pixel area P. FIG. That is, each pixel area P is driven to display an image, and accordingly, the effective display area ADR displays the image as a whole.

The outer display area ODR surrounds the effective display area ADR. That is, the outer display area ODR is positioned between the effective display area ADR and the non-display area NDR. The outer display area ODR may have a closed loop shape. For example, the outer display area ODR may have a rectangular ring shape or a rectangular frame shape.

The outer display area ODR is integrally driven. For example, the outer display area ODR may be driven to display an image in one of two background colors. That is, the outer display area ODR may be entirely black or white.

2 to 4, the outer driving electrode 150 is disposed corresponding to the outer display area ODR. The outer driving electrode 150 has a shape corresponding to the outer display area ODR. In other words, the outer driving electrode 150 surrounds the effective display area ADR. The outer display area ODR is integrally driven by the outer driving electrode 150.

The non-display area NDR surrounds the outer display area ODR. Similarly, the non-display area NDR surrounds the effective display area ADR. The non-display area NDR does not display an image. The black matrix pattern 230 that blocks light may be disposed in the non-display area NDR. In addition, an area in which the driver IC 20 is disposed also corresponds to the non-display area NDR.

The non-display area NDR may have a closed loop shape, for example. That is, the non-display area NDR may have a rectangular ring shape or a rectangular frame shape surrounding the outer display area ODR.

As shown in FIG. 4, the liquid crystal panel 10 includes a TFT substrate 100, a color filter substrate 200, and a liquid crystal layer 300. The TFT substrate 100, the color filter substrate 200, and the liquid crystal layer 300 are similarly divided into the effective display area ADR, the outer display area ODR, and the non-display area NDR. .

The TFT substrate 100 includes a first transparent substrate 110, a TFT layer 120, a plurality of pixel electrodes 130, a plurality of reflectors 140, and the outer driving electrode 150.

The first transparent substrate 110 is transparent and is an insulator. The first transparent substrate 110 has a plate shape. The first transparent substrate 110 may be, for example, a glass substrate, a plastic substrate, or a quartz substrate.

The TFT layer 120 is disposed on the first transparent substrate 110. The TFT layer 120 includes components for applying a driving signal to the pixel electrodes 130 and the outer driving electrode 150. That is, the TFT layer 120 applies a driving voltage to each pixel electrode 130 and the outer driving electrode 150.

3 and 4, the TFT layer 120 includes a plurality of gate lines 121, a plurality of data lines 122, and a plurality of thin film transistors 123.

The gate lines 121 extend in parallel with each other in a first direction. The gate lines 121 are spaced apart from each other. The gate lines 121 receive a gate signal from the driver IC 20 and transfer the gate signal to the thin film transistors 123.

The data lines 122 extend in parallel with each other in a second direction crossing the first direction. The data lines 122 are spaced apart from each other. The data lines 122 intersect the gate lines 121. The data lines 122 receive data signals from the driver IC 20 and transfer the data signals to the pixel electrodes 130, respectively.

The gate lines 121 and the data lines 122 cross each other to define a plurality of pixel regions P. Referring to FIG. As described above, the pixel areas P are positioned in the effective display area ADR. Similarly, the gate lines 121 and the data lines 122 are disposed in the effective display area ADR.

The thin film transistors 123 are disposed in an area where the gate lines 121 and the data lines 122 cross each other. The thin film transistors 123 are disposed in the pixel regions P, respectively. The thin film transistors 123 operate by the gate signal. The thin film transistors 123 selectively transfer the data signal to the pixel electrodes 130, respectively.

The TFT layer 120 may further include an insulating film interposed between the gate lines 121 and the data lines 122.

The pixel electrodes 130 are disposed on the TFT layer 120. Alternatively, the pixel electrodes 130 may be disposed in the TFT layer 120 or under the TFT layer 120.

In addition, the pixel electrodes 130 are disposed in the pixel regions P, respectively. That is, the pixel electrodes 130 are disposed in the effective display area ADR.

The pixel electrodes 130 are connected to the thin film transistors 123, respectively. Each of the pixel electrodes 130 receives the data signal through the data lines 122 by the operation of the thin film transistors 123.

The pixel electrodes 130 are transparent, and examples of a material used as the pixel electrodes 130 include indium tin oxide (ITO) or indium zinc oxide (IZO). have.

The reflectors 140 are disposed in the pixel regions P, respectively. The reflectors 140 may be disposed on the pixel electrodes 130, respectively. Alternatively, the reflectors 140 may be disposed in the TFT layer 120 or under the TFT layer 120.

The reflectors 140 have an open area. That is, the pixel area P is divided into a transmission area TA and a reflection area RA by the reflection parts 140. In other words, the pixel area includes the transmission area TA and the reflection area RA.

That is, the area in which the reflectors 140 are disposed is the reflection area RA and the open area is the transmission area TA. In the reflective area RA, ambient light may be reflected by the reflectors 140, and back light may be transmitted in the transmission area TA.

The liquid crystal display according to the embodiment may include a backlight assembly disposed under the liquid crystal panel 10. The backlight assembly generates the back light and emits the light toward the liquid crystal panel 10. In this case, the back light is transmitted through the transmission area TA, and the liquid crystal panel 10 may display an image.

That is, the liquid crystal panel 10 is a reflective transmissive liquid crystal panel 10 displaying an image using both ambient light and the back light.

Examples of the material used as the reflectors 140 may include a metal having a high reflectance such as aluminum or silver.

As illustrated in FIGS. 2 to 4, the outer driving electrode 150 is disposed on the TFT layer 120. Alternatively, the outer driving electrode 150 may be disposed in the TFT layer 120 or under the TFT layer 120.

The outer driving electrode 150 is disposed in the outer display area ODR. The outer driving electrode 150 may be disposed over the entire outer display area ODR. The outer driving electrode 150 may have a shape corresponding to the outer display area ODR.

For example, the outer driving electrode 150 may have a closed loop shape like the outer display area ODR. In more detail, the outer driving electrode 150 may have a rectangular ring shape or a rectangular frame shape.

The outer driving electrode 150 may be disposed on the same layer as the pixel electrodes 130. In addition, the outer driving electrode 150 may be formed of the same material as the pixel electrodes 130. That is, the outer driving electrode 150 may be formed simultaneously with the pixel electrodes 130 in the process of forming the pixel electrodes 130.

Alternatively, the outer driving electrode 150 may be disposed on the same layer as the reflectors 140 and may be formed of the same material as the reflectors 140. That is, the outer driving electrode 150 may be formed at the same time as the reflectors 140 in the process of forming the reflectors 140.

Alternatively, the outer driving electrode 150 may include a first layer made of the same material as the pixel electrodes 130 and a second layer made of the same material as the reflective parts 140.

In addition, the outer display area ODR may be driven in a reflection mode, a transmission mode, or a reflection transmission mode. In other words, a reflective layer may be formed in the entirety of the outer display area ODR, the reflective layer may not be disposed, or a reflective layer may be disposed in a portion thereof.

As illustrated in FIGS. 2 and 3, the outer driving electrode 150 is connected to the driver IC 20 to be driven by receiving a driving signal from the driver IC 20. That is, the TFT substrate 100 includes a wiring 21 for connecting the driver IC 20 and the outer driving electrode 150.

The color filter substrate 200 is disposed on the TFT substrate 100. The color filter substrate 200 faces the TFT substrate 100 and is spaced apart from the TFT substrate 100. The color filter substrate 200 includes a second transparent substrate 210, a plurality of color filters 220, a black matrix pattern 230, and a common electrode layer 240.

The second transparent substrate 210 is transparent and is an insulator. The second transparent substrate 210 has a plate shape. The second transparent substrate 210 may be, for example, a glass substrate, a plastic substrate, or a quartz substrate.

The color filters 220 are disposed under the second transparent substrate 210. The color filters 220 filter the transmitted white light to convert light having a color. The color filters 220 may be, for example, a red color filter, a green color filter, and a blue color filter. The color filters 220 are disposed in the pixel regions P, respectively.

The black matrix pattern 230 is disposed under the second transparent substrate 210. The black matrix pattern 230 blocks light. The black matrix pattern 230 is disposed at the boundary of the pixel areas P. As shown in FIG. In addition, the black matrix pattern 230 may be disposed to cover the thin film transistors 123.

In addition, the black matrix pattern 230 is disposed in the entire non-display area NDR. That is, the black matrix pattern 230 covers the entire non-display area NDR. Accordingly, the black matrix pattern 230 prevents light from being transmitted to the non-display area NDR.

The common electrode layer 240 is disposed under the second transparent substrate 210. The common electrode layer 240 is disposed under the color filters 220. The location of the common electrode layer 240 is not limited thereto, and may be interposed between the color filters 220 and the second transparent substrate 210.

The common electrode layer 240 is transparent and is a conductive layer. Examples of the material used as the common electrode layer 240 may include indium tin oxide or indium zinc oxide.

The common electrode layer 240 receives a common voltage from the driver IC 20. The common voltage may be an electrical signal in which a positive voltage and a negative voltage are alternated with each other.

The liquid crystal layer 300 is interposed between the TFT substrate 100 and the color filter substrate 200. In more detail, the liquid crystal layer 300 is interposed between the common electrode layer 240 and the pixel electrodes 130 and interposed between the common electrode layer 240 and the outer driving electrode 150.

The liquid crystal layer 300 is aligned by an electric field formed between the common electrode layer 240 and the pixel electrodes 130 and an electric field formed between the common electrode layer 240 and the outer driving electrode 150. do. Accordingly, the optical characteristic of the liquid crystal layer 300 is changed by the electric fields.

A sealing member is disposed between the TFT substrate 100 and the color filter substrate 200. The sealing member bonds the TFT substrate 100 and the color filter substrate 200 to each other. The sealing member is disposed in the non-display area NDR.

The liquid crystal panel 10 may further include a phase retardation film and a polarizing sheet. That is, the liquid crystal layer 300 changes the optical characteristics of light passing through the phase retardation film, the polarizing sheet, and the like, so that the intensity of light passing through the effective display area ADR of the liquid crystal panel 10 in units of pixels. I can regulate it.

In addition, the liquid crystal layer 300 disposed in the outer display area ODR has the same optical characteristics by the common electrode layer 240 and the outer driving electrode 150. Accordingly, the outer display area ODR may be integrally driven.

The driver IC 20 drives the liquid crystal panel 10. That is, the driver IC 20 is a driver for driving the liquid crystal panel 10. The driver IC 20 may be mounted on the liquid crystal panel. The driver IC 20 may include a plurality of driving circuits for driving the liquid crystal panel 10.

As described above, the driver IC 20 applies the gate signal to the thin film transistors 123 through the gate lines 121. In addition, the driver IC 20 applies the data signal to the pixel electrodes 130 through the data lines 122. In addition, the driver IC 20 applies the common voltage to the common electrode layer 240.

The driver IC 20 drives the outer driving electrode 150. The driver IC 20 applies an outer driving signal to the outer driving electrode 150. The outer driving electrode 150 forms an electric field with the common electrode layer 240 by the outer driving signal. The liquid crystal layer 300 of the outer display area ODR is aligned by the formed electric field.

For example, the driver IC 20 may apply a positive voltage to the common electrode layer 240 and a negative voltage to the outer driving electrode 150. Accordingly, black may be implemented in the outer display area ODR. That is, the driver IC 20 may apply driving signals having different polarities to the common electrode layer 240 and the outer driving electrode 150 to implement the outer display area ODR in black.

In addition, the driver IC 20 may apply the signals having the same polarity to the common electrode layer 240 and the outer driving electrode 150 to implement the outer display area ODR in white.

Since the liquid crystal display according to the exemplary embodiment includes not only the effective display area ADR but also the outer display area ODR, an area in which an image is displayed may be improved. That is, a user using the liquid crystal display according to the exemplary embodiment may recognize that the screen is wider by the outer display area ODR.

In addition, since the outer display area ODR is integrally driven, the LCD according to the exemplary embodiment may be easily driven while having a wide screen. That is, when the outer display area ODR is displayed with a background of a predetermined color, the outer display area ODR may display an image by the common electrode layer 240 and one outer driving electrode 150. have.

Accordingly, the outer display area ODR may display an image in the background using one outer driving electrode 150.

In addition, the outer driving electrode 150 may be formed together with the pixel electrodes 130. Therefore, an additional process for forming the outer display area ODR is not required, and the liquid crystal display according to the embodiment may be easily formed.

5 is a plan view illustrating an outer driving electrode according to another exemplary embodiment. FIG. 6 is a cross-sectional view illustrating a cross section taken along line BB ′ in FIG. 5. In the present embodiment, with reference to the above-described embodiment, the outer driving electrode and the TFT layer will be further described. In the description of this embodiment, the description of the previous embodiment can be essentially combined, except for the changed part.

5 and 6, the outer driving electrode 150 is disposed inside the TFT layer 120. The outer driving electrode 150 includes a first outer driving electrode 151, a second outer driving electrode 152, a third outer driving electrode 153, and a fourth outer driving electrode 154.

The first outer driving electrode 151 and the third outer driving electrode 153 extend in a first direction. That is, the first outer driving electrode 151 and the third outer driving electrode 153 are disposed in parallel with the gate wiring 121.

In addition, the first outer driving electrode 151 and the third outer driving electrode 153 are disposed on the same layer as the gate wiring 121. In addition, the first outer driving electrode 151 and the third outer driving electrode 153 are made of the same material as the gate wiring 121.

The second outer driving electrode 152 and the fourth outer driving electrode 154 extend in a second direction. That is, the second outer driving electrode 152 and the fourth outer driving electrode 154 are disposed in parallel with the data line 122.

In addition, the second outer driving electrode 152 and the fourth outer driving electrode 154 are disposed on the same layer as the data line 122. In addition, the second outer driving electrode 152 and the fourth outer driving electrode 154 are made of the same material as the data line 122.

The TFT layer 120 includes a gate insulating film 124 covering the gate wiring 121 and a passivation film 126 covering the data wiring 122.

In this case, the first outer driving electrode 151 and the third outer driving electrode 153 are disposed under the gate insulating layer 124, and the second outer driving electrode 152 and the third outer driving electrode ( 153 is disposed on the gate insulating layer 124.

The second outer driving electrode 152 and the fourth outer driving electrode 154 are formed through the holes 125 passing through the gate insulating layer 124, and thus, the first outer driving electrode 151 and the third outer driving electrode 154. It is connected to the drive electrode 153. The holes 125 expose the top surface of the first outer driving electrode 151 or the third outer driving electrode 153.

The liquid crystal display according to the present exemplary embodiment includes an outer driving electrode formed together with the gate line or the data line.

Accordingly, the liquid crystal display according to the present embodiment does not need an additional process for forming the outer display area, and can be easily manufactured.

In addition, the features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

Although described above with reference to the embodiment is only an example and is not intended to limit the invention, those of ordinary skill in the art to which the present invention does not exemplify the above within the scope not departing from the essential characteristics of this embodiment It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

1 is a plan view illustrating a liquid crystal display according to an embodiment.

2 is a plan view illustrating an outer driving electrode.

3 is a circuit diagram illustrating a liquid crystal display according to an embodiment.

4 is a cross-sectional view illustrating a cross section taken along line AA ′ in FIG. 1.

5 is a plan view illustrating an outer driving electrode according to another exemplary embodiment.

FIG. 6 is a cross-sectional view illustrating a cross section taken along line BB ′ in FIG. 5.

Claims (11)

An effective display area including a plurality of pixel areas; An outer display area surrounding the effective display area and integrally driven; And And a display panel including a non-display area surrounding the outer display area. The display device of claim 1, further comprising a backlight assembly disposed under the display panel to generate light. And each pixel area includes a transmission area for transmitting light emitted from the backlight assembly and a reflection area for reflecting external light. The display device of claim 1, wherein the display panel includes an outer driving electrode disposed in the outer display area and surrounding the effective display area. The display panel of claim 3, wherein the display panel includes pixel electrodes disposed in the respective pixel regions, The outer driving electrode is disposed on the same layer as the pixel electrode. The display panel of claim 1, wherein the display panel A first outer driving electrode and a third outer driving electrode disposed in the outer display area and extending in a first direction; And A second outer driving electrode and a fourth outer driving electrode disposed in the outer display area and extending in a second direction crossing the first direction; The first outer driving electrode, the second outer driving electrode, the third outer driving electrode and the fourth outer driving electrode are electrically connected to each other. The display panel of claim 5, wherein the display panel A plurality of gate lines extending in the first direction; And Defining the gate lines and the pixel areas and including a plurality of data lines extending in the second direction, The first outer driving electrode and the third outer driving electrode are disposed on the same layer as the gate lines; The second outer driving electrode and the fourth outer driving electrode are disposed on the same layer as the data lines. A plurality of gate wirings; A plurality of data lines crossing the gate lines and defining a plurality of pixel areas; And And an outer driving electrode surrounding the effective display area including the pixel areas. The method of claim 7, wherein the outer drive electrode A first outer driving electrode disposed in parallel with the gate lines; And And a second outer driving electrode arranged to be parallel to the data lines. The semiconductor device of claim 8, further comprising a gate insulating layer interposed between the gate lines and the data lines. The first outer driving electrode is disposed under the gate insulating film, The second outer driving electrode is disposed on the gate insulating layer; The second outer driving electrode is connected to the first outer driving electrode through a hole formed in the gate insulating layer. The display device of claim 8, wherein the first outer driving electrode is disposed on the same layer as the gate lines, and the second outer driving electrode is disposed on the same layer as the data lines. The display device of claim 10, wherein the first outer driving electrode is made of the same material as the gate lines, and the second outer driving electrode is made of the same material as the data lines.

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