KR20170004728A - Display panel and display apparatus having the same - Google Patents

Abstract

Disclosed is a display panel for implementing the efficiency on manufacturing and a using environment improved in light efficiency. According to an embodiment of the present invention, the display panel includes: a substrate; a polarization layer including a plurality of linear lattices arranged parallel to the first direction on the substrate, and outputting light, which is irradiated on the substrate through a slit between the linear lattices, by polarizing the light; a wiring layer including a plurality of linear wires arranged parallel to the second direction different from the first direction; and a circuit unit for determining a position of a touch action by applying a voltage for a touch detection onto one of the linear lattices and the wires, and then depending on an output voltage, which is generated by the touch action of a user on the display panel, from an opposite one of the linear lattices and the wires.

Description

DISPLAY PANEL AND DISPLAY APPARATUS HAVING THE SAME [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a display panel for displaying an image by self-emission or non-emission structure, and a display device having the same. More particularly, the present invention relates to a polarizer for linearly- And a touch panel for sensing a touch input of a user, and a display device having the touch panel.

The display device includes a display panel and is capable of displaying a broadcast signal or image signal / image data in various formats, and is implemented as a TV or a monitor. The display panel is configured to display an input video signal on an effective image display surface as an image, and is implemented in various display formats such as a liquid crystal panel and a plasma panel according to the characteristics thereof, and is applied to various display devices.

The display panel of the display device can be classified into a light-receiving panel structure and a self-luminescent panel structure depending on how the light for displaying an image is generated. Since the light-receiving panel structure is a non-light-emitting structure in which the display panel itself does not emit light, a separate backlight for generating light and supplying the light to the display panel needs to be disposed behind the display panel. For example, a liquid crystal display panel corresponds to a light receiving panel structure. On the other hand, the self-luminous panel structure does not require a separate backlight because the panel itself emits light. For example, an organic light emitting diode (OLED) panel corresponds to a self-luminous panel structure.

With the development of the technology and the expansion of the range of the user's demand, the display device is required to have more functions than simply displaying the image. The display device can basically have a user's input means such as a physical button or a remote controller, but a touch screen can be applied to the display device as a more intuitive input means. The touch screen is installed on a front surface of a display device and detects a position where a touch tool such as a user's finger or a stylus pen touches the touch screen, converts the sensed result into an electrical signal, It is means. The touch screen replaces other input means in a display device that emphasizes portability, such as a mobile phone, a tablet computer, or a notebook computer, and its application range is gradually expanding.

Conventionally, the touch screen is implemented separately from the display panel and is simply stacked on the front surface of the display panel. However, in this case, due to the laminated structure of the display panel and the touch screen, the efficiency of light emitted from the display panel to display an image is reduced. Therefore, if the structure of the display panel and the touch screen can be simplified when the touch screen is applied to the display panel, an improved use environment can be realized in terms of manufacturing efficiency and light efficiency.

A display panel according to an embodiment of the present invention includes a substrate; A polarizing layer including a plurality of linear gratings arranged in parallel along the first direction on the substrate, for polarizing light emitted to the substrate through the slits between the plurality of linear gratings and outputting the polarized light; A wiring layer including a plurality of wirings arranged in parallel along a second direction different from the first direction; A plurality of linear gratings and a plurality of wires, a plurality of linear gratings, and a plurality of wires, wherein the plurality of linear gratings and an output And a circuit unit for determining the position of the touch operation based on the change in the voltage. Thus, a touch screen can be realized with a simpler structure in a display panel including a polarizing layer of a linear lattice structure.

Here, the linear grating may have a metal layer for reflecting the light irradiated to the substrate, and the metal layer may be formed by applying the touch sensing voltage from the circuit portion to generate the output voltage from the plurality of wirings, Sensing voltage to be applied to the wirings of the touch sensing device. Thus, by utilizing the linear lattice of the polarizing layer as the structure of the touch screen, the touch screen can be realized with a simpler structure.

The polarizing layer may be formed on a lower surface of the substrate so as to face the light emitted to the substrate, and may be interposed between the substrate and the wiring layer. Thus, productivity can be improved at the time of manufacture by providing the wiring layer in the display panel.

Alternatively, the polarizing layer may be formed on the lower surface of the substrate to face the light emitted to the substrate, and the wiring layer may be disposed on the upper surface of the substrate opposite to the lower surface of the substrate. As a result, a separate insulating layer required between the polarizing layer and the wiring layer can be reduced, and the touch sensitivity can be relatively improved.

The circuit section may apply the touch sensing voltage to the metal layers of the plurality of linear gratings and the position of the touch operation may be determined according to the position of the wiring where the change of the output voltage occurs among the plurality of wiring lines . Alternatively, the circuit unit may apply the touch sensing voltage to the plurality of wirings, and the position of the touch operation may be determined according to the position of the metal layer in which the output voltage varies among the metal layers of the plurality of linear gratings . Thus, the touch position can be detected on the touch screen using the linear grid.

Alternatively, the substrate may include a first substrate and a second substrate facing each other, and the polarizing layer may include a first polarizing layer formed on the first substrate and a second polarizing layer formed on the first polarizing layer, 2 substrate, and the plurality of wirings of the wiring layer may include the linear lattice of any one of the first polarizing layer and the second polarizing layer. The liquid crystal display device according to claim 1, further comprising a liquid crystal layer interposed between the first substrate and the second substrate, wherein the thickness of the liquid crystal layer is set such that the linear lattice of the first polarizing layer and the linear lattice of the second polarizing layer May be less than a predetermined allowable distance corresponding to a predetermined level of the touch sensing voltage so as to be positioned within an electromagnetic field range by a touch sensing voltage. This makes it possible to realize a touch screen with a simpler structure by using the linear gratings of the first polarizing layer and the second polarizing layer without a separate wiring layer.

Further, the output voltage from the other one of the plurality of linear gratings and the plurality of wirings is generated by the electromagnetic field formed by the touch sensing voltage applied to any one of the plurality of linear gratings and the plurality of wirings . Thus, the touch position can be determined under the structure of the linear grid and the wiring formed on the display panel.

According to another aspect of the present invention, there is provided a display device including: a display panel for displaying an image; And a controller for determining a position of a user's touch operation on the display panel, wherein the display panel comprises: a substrate; A polarizing layer including a plurality of linear gratings arranged in parallel along the first direction on the substrate, for polarizing light emitted to the substrate through the slits between the plurality of linear gratings and outputting the polarized light; A wiring layer including a plurality of wirings arranged in parallel along a second direction different from the first direction; And a circuit unit for applying a voltage for touch sensing to any one of the plurality of linear grids and the plurality of wires, wherein the control unit controls the plurality of linear grids and the plurality of wires And the position of the touch operation is determined based on a change in the output voltage from the other. Thus, a touch screen can be realized with a simpler structure in a display panel including a polarizing layer of a linear lattice structure.

Here, the linear grating may have a metal layer for reflecting the light irradiated to the substrate, and the metal layer may be formed by applying the touch sensing voltage from the circuit portion to generate the output voltage from the plurality of wirings, Sensing voltage to be applied to the wirings of the touch sensing device. Thus, by utilizing the linear lattice of the polarizing layer as the structure of the touch screen, the touch screen can be realized with a simpler structure.

The polarizing layer may be formed on a lower surface of the substrate so as to face the light emitted to the substrate, and may be interposed between the substrate and the wiring layer. Thus, productivity can be improved at the time of manufacture by providing the wiring layer in the display panel.

Alternatively, the polarizing layer may be formed on the lower surface of the substrate to face the light emitted to the substrate, and the wiring layer may be disposed on the upper surface of the substrate opposite to the lower surface of the substrate. As a result, a separate insulating layer required between the polarizing layer and the wiring layer can be reduced, and the touch sensitivity can be relatively improved.

The circuit section may apply the touch sensing voltage to the metal layers of the plurality of linear gratings and the position of the touch operation may be determined according to the position of the wiring where the change of the output voltage occurs among the plurality of wiring lines . Alternatively, the circuit unit may apply the touch sensing voltage to the plurality of wirings, and the position of the touch operation may be determined according to the position of the metal layer in which the output voltage varies among the metal layers of the plurality of linear gratings . Thus, the touch position can be detected on the touch screen using the linear grid.

Alternatively, the substrate may include a first substrate and a second substrate facing each other, and the polarizing layer may include a first polarizing layer formed on the first substrate and a second polarizing layer formed on the first polarizing layer, 2 substrate, and the plurality of wirings of the wiring layer may include the linear lattice of any one of the first polarizing layer and the second polarizing layer. Here, the display panel may further include a liquid crystal layer interposed between the first substrate and the second substrate, and the thickness of the liquid crystal layer may be a thickness of the linear lattice of the first polarizing layer and a thickness of the liquid crystal layer of the second polarizing layer. A linear grating may be less than a predetermined allowable distance corresponding to a predetermined level of the voltage for touch sensing so that the linear grating is located within an electromagnetic field range by the touch sensing voltage. This makes it possible to realize a touch screen with a simpler structure by using the linear gratings of the first polarizing layer and the second polarizing layer without a separate wiring layer.

Further, the output voltage from the other one of the plurality of linear gratings and the plurality of wirings is generated by the electromagnetic field formed by the touch sensing voltage applied to any one of the plurality of linear gratings and the plurality of wirings . Thus, the touch position can be determined under the structure of the linear grid and the wiring formed on the display panel.

1 is a perspective view showing a disassembled state of a display device according to a first embodiment of the present invention,
FIG. 2 is a side sectional view showing a schematic configuration of a display device according to a second embodiment of the present invention,
FIG. 3 is a cross-sectional side view showing a structure of a touch screen applied to a display device according to a third embodiment of the present invention,
4 is a principal perspective view showing a structure of a touch screen applied to a display device according to a third embodiment of the present invention,
5 is an exemplary view illustrating a control structure of a touch screen applied to a display device according to a third embodiment of the present invention.
6 is a side cross-sectional view showing a laminated form of a display panel of a display device according to a fourth embodiment of the present invention,
FIG. 7 is a perspective view of the lower polarizing layer in the display panel of FIG. 6,
Figs. 8 to 10 are side sectional views showing an example of the lamination structure of each bar forming the linear lattice layer in the lower polarizing layer of Fig. 7, Fig.
FIG. 11 is a perspective view showing a part of a display panel applied to a display device according to a fifth embodiment of the present invention,
12 is a flowchart illustrating a process of detecting coordinates of a touch position by a display device according to a fifth embodiment of the present invention;
13 to 19 are views illustrating a process of fabricating a touch screen structure according to a sixth embodiment of the present invention.
20 is a side cross-sectional view showing a laminated form of a display panel of a display device according to a seventh embodiment of the present invention,
FIG. 21 is a side cross-sectional view showing a laminated structure of a display panel of a display device according to an eighth embodiment of the present invention,
22 is a side cross-sectional view showing a laminated structure of a display panel of a display device according to a ninth embodiment of the present invention,
23 is a flowchart showing a process of detecting coordinates of a touch position by a display device according to a ninth embodiment of the present invention,
FIG. 24 is a side cross-sectional view showing a laminated structure of a display panel of a display device according to a tenth embodiment of the present invention,
FIG. 25 is a side cross-sectional view illustrating a laminated structure of a display panel of a display device according to an eleventh embodiment of the present invention, FIG.
26 is a side cross-sectional view showing a laminated structure of a display panel in a display device according to a twelfth embodiment of the present invention,
FIG. 27 is a side cross-sectional view showing a laminated structure of a display panel in a display device according to a thirteenth embodiment of the present invention,
28 is a side cross-sectional view illustrating a laminated structure of a display panel in a display device according to a fourteenth embodiment of the present invention,
FIG. 29 is a block diagram of a configuration of a display device according to a fifteenth embodiment of the present invention;
FIG. 30 is a block diagram showing the configuration of a signal processing unit in the display device of FIG. 29;

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

If the term includes an ordinal such as a first component, a second component, or the like in the embodiment, such term is used to describe various components, and the term is used to distinguish one component from another And these components are not limited in meaning by their terms. The terms used in the embodiments are applied to explain the embodiments, and do not limit the spirit of the present invention.

In addition, in the embodiment, only the configurations directly related to the concept of the present invention will be described, and the other configurations will not be described. However, it is to be understood that, in the implementation of the apparatus or system to which the spirit of the present invention is applied, it is not meant that the configuration omitted from the description is unnecessary. It should be understood that terms such as " comprise "or" have "in the embodiments are intended to specify that there is a feature, number, step, operation, , ≪ / RTI > an operation, an element, or a combination thereof.

1 is a perspective view showing a disassembled state of a display device 100 according to a first embodiment of the present invention. The present embodiment relates to the case where the display panel 130 does not emit light by itself. For example, the display panel 130 may be applied to the display device 100 having a liquid crystal structure.

As shown in FIG. 1, the display device 100 is a device that processes an image signal received from the outside and can display an image to be processed by itself. The display device 100 may be implemented as a TV, and may include a display panel 130 for displaying images, which may be implemented by various devices such as a monitor, a portable multimedia player, a tablet computer, a mobile phone, The implementation method is not limited.

The display device 100 includes cover frames 110 and 120 forming a receiving space inside the display device 100 and a display panel 130 accommodated in the accommodating space by the cover frames 110 and 120, A panel driver 140 for driving the display panel 130 and a display panel 130 disposed behind the display panel 130 in an accommodation space formed by the cover frames 110 and 120, And a backlight unit 150.

First, each direction shown in Fig. 1 will be described. The X, Y, and Z directions basically indicate the horizontal, vertical, and normal directions of the display panel 130 on the drawing. In this figure, the display panel 130 is disposed in parallel with an XY plane which is a plane formed by an X-axis and a Y-axis, and the cover frames 110 and 120, the display panel 130, and the backlight unit 150 Are stacked along the Z-directional axis. The opposite directions in the X, Y, and Z directions are represented by -X, -Y, and -Z directions, respectively.

Unless otherwise specified, the meaning of "upper / upper" means the Z direction, and the meaning of "lower / lower" means the -Z direction. For example, the backlight unit 150 is disposed on the lower side of the display panel 30, and the illuminating light emitted from the backlight unit 150 is incident on the lower side of the display panel 130, And is emitted from the printing surface.

The cover frames 110 and 120 form the outer shape of the rectangular display device 100 and support the display panel 130 and the backlight unit 150 housed therein. The cover frame 110 and the cover frame 120 are disposed on the front cover 130 for supporting the front of the display panel 130, And a rear cover 120 for supporting the rear of the backlight unit 150. The front cover 110 has an opening 111 on the display surface parallel to the X-Y plane so that the display surface of the display panel 130 is exposed to the outside. A bezel 113 is formed around the opening 111.

The display panel 130 is a non-light emitting device that does not emit light by itself, and a liquid crystal type structure is applied according to the present embodiment. The liquid crystal display panel 130 is filled with a liquid crystal layer (not shown) between two transparent substrates (not shown), and the alignment of the liquid crystal layer (not shown) is adjusted in accordance with application of a driving signal, . Since the display panel 130 is a non-light emitting device, light is supplied from the backlight unit 150 to display an image. This light is incident on the lower plate surface of the display panel 130 and is emitted from the upper plate surface.

The panel driver 140 applies a driving signal for driving the liquid crystal layer (not shown) to the display panel 130. The panel driver 140 includes a gate driver IC (integrated circuit) 141, a data chip film package 143, and a printed circuit board 145.

The gate driving IC 141 is integrated on a substrate (not shown) of the display panel 130 and is connected to each gate line (not shown) of the display panel 130.

The data chip film package 143 is connected to the data line (not shown) of the display panel 130. The data chip film package 143 may include a TAB tape bonded to a wiring pattern formed on a base film by a TAB (Tape Automated Bonding) technique. As the data chip film package 143, for example, a tape carrier package (TCP) or a chip on film (COF) may be used.

The printed circuit board 145 inputs a gate driving signal to the gate driving IC 141 and inputs a data driving signal to the data chip film package 143.

The panel driver 140 receives a driving signal for each gate line (not shown) and each data line (not shown) of the display panel 130 in such a configuration, thereby displaying a liquid crystal layer .

The backlight unit 150 is disposed in the -Z direction of the display panel 130 to supply light to the lower plate surface of the display panel 130. The backlight unit 150 includes a light source unit 151, a light guide plate 153 disposed parallel to the display panel 130 to face the lower panel surface of the display panel 130, A reflective plate 155 disposed between the rear cover 153 and the rear cover 120 and one or more optical sheets 155 interposed between the display panel 130 and the light guide plate 153.

The light source unit 151 generates light to be supplied to the display panel 130 by converting applied voltage into light and diverging the light. The light source unit 151 in the present embodiment is arranged in the corner direction of the light guide plate 153 and has a structure in which the light irradiation direction of the light source unit 151 and the light exit direction of the light guide plate 153 are orthogonal to each other. This structure is referred to as a backlight unit 150 of an edge structure. If the light irradiation direction of the light source unit 151 is parallel to the light exit direction of the light guide plate 153, this is a direct-type backlight unit 150. That is, assuming that the light exit direction of the light guide 151 is the Z direction, the light source unit 151 has an edge-type structure when the light irradiation direction is the Y direction or -Y direction and the light irradiation direction of the light source unit 151 is the Z direction Direct-type structure.

The light source unit 151 is implemented by mounting a plurality of light emitting devices (not shown) on a substrate (not shown) extending along one direction to form heat. A wiring (not shown) to which a voltage is applied is printed on a substrate (not shown), and a structure for supplying a voltage to a light emitting element (not shown). For example, a light-emitting diode (LED) is applied to the light emitting device (not shown).

The light guide plate 153 is a plastic lens realized by an acrylic injection molding or the like and guides the light incident from the light source unit 151 uniformly to the entire surface of the display panel 130 on which the image is displayed. The lower plate surface of the light guide plate 153 faces the reflection plate 155 and the side wall between the upper plate surface and the lower plate surface of the light guide plate 153 faces the light source unit 151. In the case of the backlight unit 150 of the edge-type structure, the light irradiated from the light source unit 151 is incident on the side wall of the light guide plate 153.

The light guide plate 153 has an optical pattern (not shown) formed on the lower plate surface to diffuse the light propagating in the light guide plate 153 or change the traveling direction of the light. The light impinging on the optical pattern (not shown) is irregularly reflected and is directed in the Z direction, and contributes to light emitted from the light source unit 151 being dispersed as uniformly as possible from the upper plate surface of the light guide plate 153 and emitted.

The reflection plate 155 reflects the light coming from the lower plate surface of the light guide plate 153 to enter the light guide plate 153 again below the light guide plate 153. More specifically, the reflection plate 155 reflects light in the -Z direction without being reflected in the Z direction by the optical pattern (not shown) of the light guide plate 153 again into the light guide plate 153 do. For this, the top plate surface of the reflection plate 155 has a total reflection characteristic.

One or more optical sheets 155 are stacked on the top plate surface of the light guide plate 153 to adjust the optical characteristics of light emitted from the top plate surface of the light guide plate 153 toward the display panel 130. The optical sheet 155 includes a diffusion sheet, a prism sheet, a dual brightness enhancement film (DBEF), a protective sheet and the like, and two or more sheets can be combined in consideration of the final result of the optical property to be adjusted.

2 is a side sectional view showing a schematic configuration of a display device 200 according to a second embodiment of the present invention. The configuration described in this embodiment shows only a partial configuration of the display device 200, and is substantially the same device as the display device 100 (see Fig. 1) of the first embodiment.

2, the display device 200 includes a display panel 210, a light source 220, a light guide plate 230, a reflection plate 240, and optical sheets 250, 260, and 270 do. This configuration of the display device 200 basically corresponds to the configuration described in the first embodiment.

The display panel 210 includes a lower substrate 211, an upper substrate 212 disposed to face the lower substrate 211, a liquid crystal layer 213 filled between the lower substrate 211 and the upper substrate 212, A color filter layer 214 interposed between the liquid crystal layer 213 and the lower substrate 211, a lower polarizing layer 215 disposed on the lower surface of the lower substrate 211, And a top polarizing layer 216 disposed on the top plate surface.

Such a display panel 210 is one of various liquid crystal panel structures, and various types of panel structures may be applied according to a designing method, so that the present embodiment does not limit the structure of the display panel 210. [ In addition, in this embodiment, only representative ones of the respective components of the display panel 210 are schematically shown. The structure of the actual display panel 210 is more complicated, and additional components not described in this embodiment are applied do. However, only the basic structure of the display panel 210 directly related to the concept of the present invention will be described in this embodiment, and a detailed description of the detailed structure that is not directly related will be omitted.

The optical sheets 250, 260, and 270 are interposed between the upper panel surface of the light guide plate 230 and the display panel 210, and include at least one of various kinds of sheets. In the present embodiment, the optical sheets 250, 260, and 270 include the diffusion sheet 250, the prism sheet 260, and the DBEF 270, which are sequentially stacked, 250, 260, 270) is not limited to one.

Hereinafter, each component of the display panel 210 will be described in detail.

The lower substrate 211 and the upper substrate 212 are transparent substrates arranged to face each other at a predetermined interval along the Z direction. In the material aspect, the lower substrate 211 and the upper substrate 212 are formed of a glass or plastic substrate. The lower substrate 211 and the upper substrate 212 may be formed of a plastic material such as poly-carbonate (PC), polyimide (PI), polyethersulphone (PES), poly- ethylene-naphthelate, and PET (poly-ethylene-terephthalate).

The lower substrate 211 and the upper substrate 212 may require individual characteristics depending on the driving method of the liquid crystal layer 213. [ For example, if the driving method of the liquid crystal layer 213 is a passive matrix type, soda lime glass is used for the lower substrate 211 and the upper substrate 212. If the driving method of the liquid crystal layer 213 is an active matrix method, alkali free glass and borosilicate glass can be used for the lower substrate 211 and the upper substrate 212.

The liquid crystal layer 213 is disposed between the lower substrate 211 and the upper substrate 212 and adjusts the light transmission by changing the arrangement of the liquid crystal in accordance with the applied driving signal. Normal liquids have no regularity in the orientation and arrangement of molecules, but liquid crystals are similar to liquid phases with some regularity. For example, when heated and melted, there is a solid that becomes a liquid phase exhibiting anisotropy such as birefringence. Liquid crystals have optical characteristics such as birefringence and color change. Regularity is the property of crystals, and since the phase of a substance is similar to that of a liquid, it is called a liquid crystal. When a voltage is applied to such a liquid crystal, the arrangement of the molecules changes, thereby changing the optical properties.

The liquid crystal in the liquid crystal layer 213 may be classified into nematic, cholesteric, smectic, and ferroelectric liquid crystal depending on the molecular arrangement.

The color filter layer 214 filters incident light with a predetermined color, thereby emitting light of a corresponding color. The color filter layer 214 has sub-pixel regions corresponding to RGB colors. When the white light is incident on the color filter layer 214, each sub pixel region of the color filter layer 214 converts the corresponding white light into light of RGB color and emits the light, thereby displaying a color image on the display panel 210 . That is, the color image of the display panel 210 is realized by mixing white light from the light source 220 with light of RGB color, which is transmitted through the liquid crystal layer 213 and transmitted through the color filter layer 214 do.

The color filter layer 214 is implemented by forming RGB patterns (not shown) that respectively implement RGB colors on a black matrix (not shown). A black matrix (not shown) is positioned between the RGB patterns (not shown) to discriminate and block the light between the RGB subpixels, thereby improving the contrast of the image. The RGB pattern (not shown) of the color filter layer 214 is manufactured by coloring a light transmitting film with a pigment or a dye, and has a property of absorbing light of an incompatible color among incident light.

The lower polarizing layer 215 is stacked on the lower plate 211 of the lower substrate 211 and the upper polarizing layer 216 is stacked on the upper plate 212 of the upper substrate 212. That is, in this embodiment, the lower substrate 211, the liquid crystal layer 213, and the upper substrate 212 are interposed between the lower polarizing layer 215 and the upper polarizing layer 216. The lower polarizing layer 215 and the upper polarizing layer 216 are implemented in the form of a polarizing film attached to the lower substrate 211 and the upper substrate 212.

Basically, light is an electromagnetic wave, and the vibration direction of the light is perpendicular to the traveling direction of the light. Polarized light refers to light that is deflected in its vibration direction, that is, light that is strongly vibrating in a specific direction among directions perpendicular to the advancing direction. The polarizing film has a characteristic of separating incident light into two polarizing components orthogonal to each other and passing only one of the two polarizing components.

The light coming from the light source 220 has a probability that its vibration direction is substantially the same for all directions. The polarizing film transmits only the light vibrating in the same direction as the polarization axis among these lights, and blocks the light vibrating in the other direction in addition to that, thereby con- trolling the light to oscillate in a specific one direction.

An approximate structure of the polarizing film applied to the lower polarizing layer 215 and the upper polarizing layer 216 is as follows.

The polarizing film is a tri-acetate cellulose (TAC) film mainly composed of a polarizing element implemented with a PVA (polyvinyl alcohol) film in which a dichroic substance is dyed, and protective layers serving as a protective element of the polarizing element are formed on the polarizing element It has a shape that is bonded to both sides. This form is referred to as a three-layer structure of TAC-PVA-TAC, which is the most basic form of polarizing film. The surface of the TAC film serving as a protective layer may be subjected to a surface coating treatment having properties such as scattering, hardening, anti-reflection and low reflection depending on the required properties.

The polarizing film is prepared by uniaxially stretching the PVA film to culture the polymer chains in the stretching direction, and dichroic iodine molecules or dichroic dye molecules are dyed on the stretched PVA film and aligned in the stretching direction . The iodine molecules and dyestuff molecules having dichroism are arranged in parallel with the stretching direction so as to transmit the light oscillating in the stretching direction.

The lower polarizing layer 215 transmits only the component of the predetermined first polarization direction in the incident light, and blocks components other than the first polarization direction. On the other hand, the upper polarizing layer 216 transmits only the component of the predetermined second polarization direction in the incident light, and blocks components other than the second polarization direction. Here, the first polarization direction is different from the second polarization direction, and more specifically, the first polarization direction is perpendicular to the second polarization direction. For example, when the lower polarizing layer 215 transmits P polarized light, the upper polarizing layer 216 transmits S polarized light.

The polarization direction through which the lower polarizing layer 215 transmits and the polarizing direction through which the upper polarizing layer 216 transmits are perpendicular to each other because the light emitted from the light source 220 passes through the liquid crystal layer 213 This is because the polarizing direction of the irradiation light is rotated 90 degrees by the liquid crystal layer 213. If the upper polarizing layer 216 transmits the light component in the first polarization direction in the same way as the lower polarizing layer 215, the irradiation light in the first polarization direction passing through the lower polarizing layer 215 is transmitted through the liquid crystal layer 213 And thus it will not pass through the upper polarizing layer 216. [0064] As shown in FIG. Therefore, the polarization direction of the light transmitted through the upper polarizing layer 216 is perpendicular to the polarization direction of the light transmitted through the lower polarizing layer 215.

Hereinafter, a process of supplying light to the display panel 210 after the light from the light source 220 is generated will be described.

The light source 220 generates light by the applied voltage and irradiates the light to the side wall of the light guide plate 230. The light source 220 in this embodiment generates white light.

The light emitted from the light source 220 enters the light guide plate 230 and is reflected by the light guide plate 230 by a process of being scattered by a pattern (not shown) of the lower plate surface of the light guide plate 230, As shown in Fig. Here, the light emitted from the upper plate surface of the light guide plate 230 does not include only a component in one direction but includes components having various directions of travel with respect to the Z-axis axis.

The light emitted from the light guide plate 230 passes through the diffusion sheet 250, the prism sheet 260 and the DBEF 270 to adjust the optical characteristics to reach the lower polarizing layer 215.

The diffusion sheet 250 has a structure in which a small sheet of diffusion pigment is coated on both sides of the polymer sheet based on a sheet made of a polymer material. Specifically, the diffusion sheet 250 is produced by applying a binder to both sides of the polymer sheet, and then performing coating using beads on the binder. Since the light is diffused by the beads, the diffusion sheet 250 particularly serves to cancel the pattern (not shown) of the lower plate surface of the light guide plate 230.

The prism sheet 260 focuses the light incident in various directions to be directed in the Z direction. Light that has passed through the diffusion sheet 250 is diffused in both the horizontal direction and the vertical direction, causing a significant decrease in luminance. The prism sheet 260 again focuses the light diffused in various directions to increase the brightness again. The prism sheet 260 is implemented by using PET as a base and a plurality of prisms extending in one direction on the upper plate surface on which light is emitted from the PED sheet. The conversion of the traveling direction of the incident light is caused by the refraction phenomenon of these prisms.

The DBEF 270 is configured to allow one of the polarized light components in the Z direction to pass through the light emitted from the light guide plate 230 and reflect the other polarized light components in the -Z direction to be recycled. For example, the DBEF 270 transmits P-polarized light among the light emitted from the light guide plate 230 and reflects the S-polarized light back to the light guide plate 230. The S polarized light reflected toward the light guide plate 230 is transmitted to the DBEF 270 again by the property of the light guide plate 230 (not shown) and the reflection plate 240. In this process, the P-polarized light in the recycled light is transmitted by the DBEF 270 and the remainder is reflected again, so that the efficiency of light transmitted to the lower polarized light layer 215 by the DBEF 270 becomes relatively high.

The direction of polarization of the light that the DBEF 270 passes is the same as that of the lower polarizer 215. That is, if the lower polarizing layer 215 is made to pass the P polarized light, the DBEF 270 is also made to pass the P polarized light. A more detailed description of the functions of the DBEF 270 will be given later.

The lower polarizing layer 215 polarizes and transmits the light transmitted from the DBEF 270 to the color filter layer 214. The color filter layer 214 converts the white light transmitted by each sub-pixel into light of RGB color according to each sub-pixel and transmits the light to the liquid crystal layer 213. The light of RGB color that has passed through the liquid crystal layer 213 passes through the upper polarizing layer 216 and is emitted to the outside. Thus, the color image can be displayed on the display panel 210.

Hereinafter, a touch screen may be applied to the display device 200 by stacking the touch screen on the upper side of the display panel 210 and providing circuit wiring under such a structure.

A touch screen or a touch panel is an input device that detects a touched position when a user touches the screen with a finger or a stylus pen and transmits coordinates to the system. The touch screen includes a sensing panel for outputting an analog signal corresponding to a position where a touch is generated, a control IC for converting an analog signal output from the sensing panel into a digital signal and converting the analog signal into a coordinate form, As shown in FIG. The touch screen may be a resistance film type, a capacitive type, an ultrasonic type, an infrared type, or an optical type depending on the technology to be implemented.

Hereinafter, an embodiment of a touch screen applied to the display device 200 will be described.

FIG. 3 is a cross-sectional view illustrating a structure of a touch screen 310 applied to a display device 300 according to a third embodiment of the present invention. FIG. 4 is a cross- The touch screen 310 may be a touch screen.

In the display device 300 according to the present embodiment, the basic structure other than the configuration related to the touch screen 310 is substantially the same as the display device 200 according to the second embodiment.

As shown in FIGS. 3 and 4, the touch screen 310 is installed on the upper side of the display panel 210 (see FIG. 2) so as to easily detect the touch input of the user. The touch screen 310 includes a transmission wiring layer 311 including a plurality of transmission wirings 315, a reception wiring layer 312 stacked on the transmission wiring layer 311 and including a plurality of reception wirings 316, And a glass cover 313 which is laminated on the wiring layer 312.

The plurality of transmission wirings 315 are arranged with a predetermined interval between a plurality of wirings extending along a predetermined first direction. A voltage pulse is applied to each of the transmission wirings 315 to sense a touch position generated on the glass cover 313 by the user.

The plurality of reception wirings 316 are arranged with a predetermined interval between a plurality of wirings extending along a predetermined second direction. The first direction and the second direction are mutually different directions, for example, mutually orthogonal. When the flat surface of the touch screen 310 is viewed from above, the transmission wiring 315 and the reception wiring 316 cross each other to form a network structure.

The transmission wiring 315 and the reception wiring 316 are mutually insulated. Although the transmission wiring 315 is described as being disposed on the lower side of the reception wiring 316 in this embodiment, the reception wiring 316 may be disposed on the lower side of the transmission wiring 315 depending on the design method. However, the structure in which the reception wiring 316 is closer to the position where the user touches the transmission wiring 315 can increase the touch sensitivity. The number of the transmission wirings 315 and the number of the reception wirings 316 can be variously determined according to the size of the screen and is not specifically limited.

When a voltage pulse of a predetermined magnitude is applied to each transmission wiring 315, an electromagnetic field is formed between the transmission wiring 315 and the reception wiring 316, thereby coupling a predetermined-sized voltage to the reception wiring 316 . In this state, when a user touches one position on the glass cover 313 with a fingertip, a part of the charge is absorbed by the user's finger, thereby reducing the total amount of energy output from the receiving wiring 316. [ Since this change in energy is represented by a change in the voltage at the reception wiring 316, the touch position can be sensed based on this voltage change.

5 is an exemplary view showing a control structure of the touch screen 310 applied to the display device 300 according to the third embodiment of the present invention.

5, the display device 300 includes a transmission circuit unit 320 for applying a voltage pulse to a plurality of transmission lines 315, a reception circuit unit 330 for receiving a voltage from the plurality of reception lines 316, A DBE (Digital Back End) IC 340 for controlling a voltage pulse applied to the transmission circuit unit 320 and analyzing a voltage received by the reception circuit unit 330 to determine a touch position, And a control unit 350 for executing a corresponding operation.

In this figure, the transmission line 315 is disposed horizontally of the touch screen 310, the reception line 316 is disposed vertically of the touch screen 310, and the transmission circuit 320 corresponds to the touch screen 310, And the receiving circuit unit 330 is disposed on the lower side of the touch screen 310. [ However, this is only an example, and the arrangement of the transmission wiring 315, the reception wiring 316, the transmission circuit 320, and the reception circuit 330 can be variously implemented.

The transmitting circuit 320 and the receiving circuit 330 are disposed in the corner area of the display device 300, that is, the bezel 113 (see FIG. 1) As shown in Fig.

However, the following problems may occur in the display device 300 according to the present embodiment.

In order for a liquid crystal display panel to display an image, light must be provided from a backlight unit, and the light can be viewed by a user by transmitting the light through the liquid crystal display panel. Since the backlight unit can include one or more optical sheets and the liquid crystal display panel basically includes the polarizer, the light emitted from the light source of the backlight unit is absorbed to a great extent by these optical sheets and the polarizer. In addition, in the structure in which the touch screen 310 is laminated on the liquid crystal display panel, the light emitted from the liquid crystal display panel again has to transmit through the touch screen 310, resulting in further lowering of the light efficiency.

In addition, if the touch screen 310 provided separately from the liquid crystal display panel is applied, the manufacturing cost of the display device 300 increases, and the structure can be complicated.

Before describing the structure of a display device to overcome such a problem, a display device to which a linearly polarized polarizer is applied will be described first.

6 is a side cross-sectional view showing a stacked structure of a display panel 410 of a display device 400 according to a fourth embodiment of the present invention.

As shown in FIG. 6, the display device 400 according to the fourth embodiment includes a display panel 410 and a backlight unit 420 that provides light to the display panel 410.

The display panel 410 includes a lower substrate 411, an upper substrate 412 disposed to face the lower substrate 411, a liquid crystal layer 413 filled between the lower substrate 411 and the upper substrate 412, A color filter layer 414 interposed between the liquid crystal layer 413 and the lower substrate 411, a lower polarizing layer 415 disposed on the upper plate surface of the lower substrate 411, And an upper polarizing layer 416 disposed on the lower plate surface.

The backlight unit 420 includes a light source (not shown) that generates light. The configuration of the backlight unit 420 other than the light source (not shown) can be applied to the case of the above embodiment, and various other known technologies can be applied to the backlight unit 420, and a detailed description thereof will be omitted.

The display panel 410 according to the present embodiment differs from the structure of the second embodiment related to the preceding Fig. 2 in the following two points. First, the lower polarizer layer 415 and the upper polarizer layer 416 according to the present embodiment are implemented as a linear lattice layer formed on the lower substrate 411 and the upper substrate 412, respectively. Second, the lower polarizing layer 415 and the upper polarizing layer 416 are formed on the inner side of the display panel 410 rather than on the outer side thereof. The above embodiments can be applied to the other lower substrate 411, the upper substrate 412, the liquid crystal layer 413, and the curly filter layer 414.

The linear lattice layer (not shown) forming the lower polarizing layer 415 and the upper polarizing layer 416 respectively includes a plurality of bars (not shown) extending in one direction. The polarizing component transmitted through the lower polarizing layer 415 and the polarizing component transmitted through the upper polarizing layer 416 are orthogonal to each other and the extending direction of the linear grating (not shown) of the lower polarizing layer 415 and the extending direction of the upper polarizing layer 416 (Not shown) are also orthogonal to each other.

Each bar (not shown) forming a linear grating layer (not shown) is arranged at a pitch of a predetermined interval, and the extension direction thereof is provided so as to correspond to each polarization direction. A linear grating (not shown) of the upper polarizing layer 416 extends from the upper substrate 412 toward the liquid crystal layer 413 and a linear grating (not shown) of the lower polarizing layer 415 extends toward the lower substrate 411. [ To the liquid crystal layer 413, respectively. A detailed description of the linear grid (not shown) will be given later.

The lower polarizing layer 415 and the upper polarizing layer 416 are formed directly on the lower substrate 411 and the upper substrate 412 by etching or the like unlike the polarizing layer of the film type shown in the previous embodiment, 411) and the inside of the upper substrate 412 rather than the outside thereof.

Further, the lower polarizing layer 415 and the upper polarizing layer 416 reflect the polarized light component that does not transmit due to the characteristic of the linear grating (not shown), not the light. That is, since the lower polarizing layer 415 and the upper polarizing layer 416 according to the present embodiment can perform the DBEF function, the DBEF can be omitted in the backlight unit 420. [

Hereinafter, the linear lattice structure of the lower polarizing layer 415 will be described.

7 is a main perspective view of the lower polarizing layer 415. FIG.

As shown in Fig. 7, the lower polarizing layer 415 is disposed on the lower substrate 411 in parallel with a plurality of bars 415a extending along one direction. One bar 415a has a predetermined height H and width W and a plurality of bars 415a are periodically arranged with a predetermined pitch P. [

When the pitch P of the linear lattice structure is adjusted to 1/2 of the wavelength of the light, only the transmitted light and the reflected light exist without the formation of the diffraction wave. A slit is formed between two mutually adjacent bars 415a in the linear lattice. The first polarized light component in the first polarization direction perpendicular to the extending direction of the bar 415a passes through the lower polarized light layer 415 when the incident light passes through this slit. On the other hand, the second polarized light component in the second polarization direction parallel to the extending direction of the bar 415a can not pass through the lower polarized light layer 415 and is reflected in the incident direction. That is, with this linear grating structure, light passing through the lower polarizing layer 415 is polarized and filtered in the first polarization direction.

The light that is reflected without being transmitted through the lower polarizing layer 415 is reflected again to the lower polarizing layer 415 together with the irradiation light supplied from the backlight unit 420 (see FIG. 6). This means that the light that can not be passed by the lower polarizing layer 415 and is filtered can be recycled, thereby improving the overall optical efficiency of the light that the display panel 410 passes through without using the DBEF film.

It is preferable that the aspect ratio of the width W of the bar 415a to the height H be not less than 1: 3 in order to improve the polarization filtering characteristics of the lower polarizing layer 415. [

The upper polarizing layer 416 (see FIG. 6) has a shape in which the lower polarizing layer 415 is inverted as described above, and has a linear lattice structure similar to the lower polarizing layer 415. However, the linear grating of the upper polarizing layer 416 (see Fig. 6) has an extending direction orthogonal to the linear grating of the lower polarizing layer 415. Thus, the upper polarizing layer 416 (see Fig. 6) transmits only the second polarized light component and does not transmit the first polarized light component.

Hereinafter, the structure of the bar forming the linear lattice will be described.

8 to 10 are side cross-sectional views showing examples of lamination structures of the bars 440, 460 and 480 forming the linear grating layer.

8, the linear grating forming the polarizing layer includes a plurality of bars 440, each bar 440 includes a first dielectric layer 441 sequentially stacked on a substrate 430, A metal layer 442, and a second dielectric layer 443. In this case, In terms of materials, the first dielectric layer 441 includes silicon nitride (SiNx), the metal layer 442 includes metal, the second dielectric layer 443 includes silicon dioxide (SiO2), and the like. Of course, such a material is not limited, and various materials may be applied to each layer.

The metal layer 442 includes a metal material such as Au, Al, Cu, or Ag that easily reflects light, and reflects light of a polarized component that is not transmitted in a direction in which the light is incident. The second dielectric layer 443 may protect the metal layer 442 or may serve as a light absorbing layer for absorbing external light.

Alternatively, as shown in FIG. 9, each bar 460 may have a two-layer structure in which a metal layer 461 and a dielectric layer 462 are sequentially stacked on a substrate 450. Even in this case, the metal layer 461 serves to reflect the light of the polarization component which is not transmitted.

Alternatively, as shown in FIG. 10, each bar 480 may be a single-layer structure in which a metal layer 480 is laminated on a substrate 470.

As shown in FIGS. 8 to 10, the linear grating structure includes reflection layers 442, 462, and 480 for reflecting light in any of the embodiments, thereby changing the polarization components, which are not transmitted through the incident light, Can be reflected in the direction of incidence.

Note that each of the bars 440, 460, and 480 extend in one direction over the entire display surface of the display panel, and the reflective layers 442, 462, and 480 are formed of a conductive metal layer. These reflection layers 442, 462, and 480 are similar to the arrangement of a plurality of transmission lines or a plurality of reception lines in the touch screen in the foregoing embodiment. Therefore, when the touch screen is implemented on the display panel, the reflective layers 442, 462, and 480 can be used as the transmission wiring or the reception wiring of the touch screen.

FIG. 11 is a perspective view showing a part of a display panel 500 applied to a display device according to a fifth embodiment of the present invention.

In the drawing, only the structure related to the touch screen on the upper side of the liquid crystal layer 520 is shown, not the entire display panel 500. It is to be noted that, in this figure, the arrangement and arrangement of the respective components are expressed by separating some of the components from each other.

11, the display panel 500 according to the fifth embodiment includes an upper substrate 510, a liquid crystal layer 520, and a liquid crystal layer 520 extending along the Y direction on the lower surface of the upper substrate 510 And a wiring layer 540 formed by a plurality of wirings extending between the upper polarizing layer 530 of the linear grating structure and the liquid crystal layer 520 and the upper polarizing layer 530 and extending in the X direction.

Although the upper polarizer layer 530 extends along the Y direction and the wiring layer 540 extends along the X direction in this embodiment, this is only one example. For example, the upper polarizer layer 530 The wiring layer 540 may extend along the X direction and extend along the Y direction. However, the extending direction of the upper polarizing layer 530 and the extending direction of the wiring layer 540 are perpendicular to each other.

Insulating layers 550 and 560 are interposed between the upper polarizing layer 530 and the wiring layer 540 and between the wiring layer 540 and the liquid crystal layer 520, respectively. The insulating layers 550 and 560 include a material such as SiO2 or SiNx, and perform a role of insulation and planarization.

As described in the third embodiment, the touch screen includes a transmission wiring layer including a plurality of transmission wirings to which a sensing voltage is applied, and a transmission wiring layer in which an electromagnetic field is formed by a sensing voltage applied to the transmission wiring layer, And a reception wiring layer including a plurality of reception wirings for sensing a touch position based on the change. In this embodiment, the upper polarizer layer 530 serves as a receiving wiring layer, and the wiring layer 540 serves as a transmitting wiring layer. Alternatively, the upper polarizing layer 530 becomes a transmission wiring layer, and the wiring layer 540 becomes a reception wiring layer.

Although both the former and the latter can be structured, in order to improve the touch sensitivity of the touch screen, the amount of charge absorbed by the user's touch operation must be increased. That is, since it is advantageous that the receiving wiring layer is closer to the touch surface of the touch screen than the transmission wiring layer, it is more preferable that the upper polarizing layer 530 is the receiving wiring layer and the wiring layer 540 is the transmitting wiring layer.

Under such a structure, the basic operation of the touch screen can be applied to the contents described in the third embodiment. When a predetermined voltage pulse for touch detection is applied to a plurality of transmission lines of the wiring layer 540, an electromagnetic field is formed between each metal layer of the upper polarizer layer 530 and the transmission line. When the user touches one position of the upper substrate 510 with a finger, some charges are absorbed by the user's finger at the touch position and a change occurs in the voltage output from the metal layer of the upper polarizer layer 530 corresponding to the touch position do. Based on this change, the display device determines the coordinates of the touch position.

Alternatively, a predetermined voltage pulse for touch sensing may be applied to each metal layer of the upper polarizer layer 530, and an electromagnetic field is also formed between each metal layer of the upper polarizer layer 530 and the transmission wiring. When the user touches one position of the upper substrate 510 with a finger, some charge is absorbed by the user's finger at the touch position, and a change occurs in the voltage output from the wiring of the wiring layer 540 corresponding to the touch position. Based on this change, the display device determines the coordinates of the touch position.

As described above, the display device according to the present embodiment uses a metal layer of a linear lattice provided for polarized light filtering as either a transmission wiring to which a sensing voltage is applied and a reception wiring to sense a change in sensing voltage according to a touch operation, And the other of the wiring and the receiving wiring is installed on the lower side of the linear grating. This makes it possible to realize a touch screen with a simpler structure in the display panel.

On the other hand, since the pitch between the plurality of bars of the upper polarizing layer 530 is a scale of nano units, applying a voltage pulse to all metal layers of the linear lattice can be excessively designed. In this case, it is possible to design the voltage pulse to be applied only to the metal layers arranged at predetermined intervals.

Although the upper polarizing layer 530 is provided on the upper side of the wiring layer 540 in the present embodiment, the wiring layer 540 may be provided on the upper side of the upper polarizing layer 530.

FIG. 12 is a flowchart illustrating a process of detecting coordinates of a touch position by a display device according to a fifth embodiment of the present invention. The structure of the display device 500 in which the present process is executed is as described with reference to FIG.

12, in step S110, the display device applies a sensing voltage pulse to the wiring layer 540 below the upper polarizer layer 530 of the linear grating.

In step S120, an electromagnetic field is formed between the wiring layer 540 and the upper polarizing layer 530 by a voltage pulse applied to the wiring layer 540. [

In step S130, a predetermined voltage is output from each metal layer of the linear grating of the upper polarizer layer 530 due to the electromagnetic field.

In step S140, the user touches a position on the upper substrate 510.

In step S150, some charges are absorbed by the user from the electromagnetic field at the touch position, and accordingly, a change in the output voltage occurs in the metal layer of the upper polarizer layer 530 corresponding to the touch position.

In step S160, the display device specifies a metal layer on which the output voltage changes, and determines coordinates of the touch position based on the identified metal layer.

Hereinafter, a process of manufacturing the touch screen structure as in the present embodiment will be described.

FIGS. 13 to 19 are views illustrating a process of fabricating a touch screen structure according to a sixth embodiment of the present invention.

As shown in FIG. 13, the manufacturer has a transparent substrate 610 and one side of the substrate 610 faces upward. The substrate 610 becomes the upper substrate of the display panel. One surface of the substrate 610 facing the upper side is a surface facing the liquid crystal layer and one surface of the substrate 610 facing the lower surface is a surface facing the user when applied to a display device.

The manufacturer forms a linear grid 620 in the central region of the plate surface of the substrate 610. [ The linear grating 620 becomes the upper polarizing layer of the display panel. In the plate surface of the substrate 610, a region around the linear grating 620 in which the linear grating 620 is not formed becomes a bezel region 611. Although not shown in the drawing, an alignment mark for aligning the bezel area 611 with another structure of the display panel may be displayed on the bezel area 611 later.

One example of the process of forming the linear grating 620 on the substrate 610 is outlined below. The manufacturer manufactures a master mold having a pattern corresponding to the linear grating 620 and performs a process of transferring the linear grating pattern from the master mold to the substrate 610. When a master mold according to one standard is manufactured, the manufacturer can apply the linear grid pattern transferred from the master mold to the substrate 610 of the same standard. This is because the linear lattice pattern is mass-produced from one master mold, which is excellent in productivity.

The manufacturer creates a pattern template of the linear grating 620 containing photoresist by the master mold. The manufacturer applies one or more layers of a material for forming the linear grating 620 on the substrate 610, and then stacks the pattern templates thereon. In this state, the manufacturer performs etching with an inert gas, and the linear template 620 can be formed on the substrate 610 by the pattern template serving as a mask.

14, the manufacturer forms the first conductive layer 630 by applying a conductive material such as Al on the bezel region 611 around the linear grid 620. [ The first conductive layer 630 is a layer for forming wiring of a circuit and is not limited as long as it has conductivity.

When applying a conductive material to form the first conductive layer 630, the mask may be coated on the linear grid 620 in advance so that the linear grid 620 is not coated with a conductive material.

As shown in FIG. 15, the manufacturer forms the first circuit 640 on the bezel region 611 by performing exposure and etching on the first conductive layer 630 (see FIG. 14). The first circuit 640 is implemented by either a transmission wiring circuit or a reception wiring circuit of a touch screen.

When implemented as a transmission wiring circuit, the first circuit 640 is provided so as to be able to apply a sensing voltage to each metal layer of the linear grid 620. On the other hand, when implemented as a receiving wiring circuit, the first circuit 640 is arranged to sense a change in voltage output from each metal layer of the linear grating 620.

As shown in Fig. 16, the manufacturer can fabricate a first insulation 620 of SiO2 or SiNx material on the linear grid 620 (see Fig. 15), the first circuit 640 (see Fig. 15), the bezel region 611 The layer 650 is applied. This process is referred to as primary passivation. The first insulation layer 650 functions as insulation and planarization.

As shown in FIG. 17, the manufacturer forms a second conductive layer 660 by applying a conductive material such as Al on the first insulating layer 650. The second conductive layer 660 is a layer for forming wiring of a circuit, and its material is not limited as long as it has conductivity.

18, the manufacturer performs the exposure and etching on the second conductive layer 660 (see FIG. 17) to form the wiring layer 670 and the second circuit 680 on the first insulating layer 650. [ . The wiring layer 670 plays a role of a configuration opposite to the linear grid 620 (see Fig. 15) among the transmission wiring and the reception wiring of the touch screen. The second circuit 680 serves as a configuration for the first circuit 640 (see FIG. 15) among the transmission wiring circuit and the reception wiring circuit of the touch screen.

The second circuit 680 is provided so as to be able to sense a change in the voltage output from each wiring of the wiring layer 670. [ On the other hand, in the case of being implemented as a transmission wiring circuit, the second circuit 680 is provided so as to be able to apply a sensing voltage to each wiring of the wiring layer 670.

As shown in FIG. 19, the manufacturer has a second insulating layer 690 (see FIG. 18) made of SiO 2 or SiNx on the first insulating layer 650, a wiring layer 670 ). This process is referred to as secondary passivation. The second insulating layer 690 performs the function of insulation and planarization.

With this process, the manufacturer can implement a touch screen integrated with a polarizing layer of a linear lattice structure on a display panel.

Hereinafter, the application of the display panel to the touch screen structure thus manufactured will be described.

20 is a side cross-sectional view showing a laminated structure of a display panel 710 of a display device 700 according to a seventh embodiment of the present invention.

20, the display device 700 according to the seventh embodiment includes a display panel 710 and a backlight unit 720 for providing light to the display panel 710. [

The display panel 710 includes a lower substrate 711, an upper substrate 712 disposed to face the lower substrate 711, a liquid crystal layer 713 filled between the lower substrate 711 and the upper substrate 712, A color filter layer 714 interposed between the liquid crystal layer 713 and the lower substrate 711, a lower polarizing layer 715 disposed on the upper surface of the lower substrate 711, And an upper polarizing layer 716 disposed on the lower plate surface.

The display panel 710 includes a wiring layer 717 interposed between the upper polarizing layer 716 and the liquid crystal layer 713 so as to correspond to the upper polarizing layer 716 for touch sensing and the upper polarizing layer 716, A first insulating layer 718 interposed between the wiring layers 717 and a second insulating layer 719 interposed between the wiring layer 717 and the liquid crystal layer 713. [

As described above, according to this embodiment, the upper polarizing layer 716 for polarized light filtering is utilized for the realization of the touch screen, so that the touch screen can be applied to the display panel 710 with a simpler structure.

FIG. 21 is a side cross-sectional view showing a laminated form of the display panel 810 of the display device 800 according to the eighth embodiment of the present invention.

As shown in FIG. 21, the display device 800 according to the eighth embodiment includes a display panel 810 and a backlight unit 820 that provides light to the display panel 810.

The display panel 810 includes a lower substrate 811, an upper substrate 812 disposed facing the lower substrate 811, a liquid crystal layer 813 filled between the lower substrate 811 and the upper substrate 812, A color filter layer 814 interposed between the liquid crystal layer 813 and the lower substrate 811, a lower polarizing layer 815 disposed on the lower surface of the lower substrate 811, And a top polarizing layer 816 disposed on the bottom surface.

The display panel 810 includes a wiring layer 817 interposed between the upper polarizing layer 816 and the liquid crystal layer 813 so as to correspond to the upper polarizing layer 816 for touch sensing and the upper polarizing layer 816, A first insulating layer 818 interposed between the wiring layers 817 and a second insulating layer 819 interposed between the wiring layer 817 and the liquid crystal layer 813. [

The present embodiment is different from the seventh embodiment in that the lower polarizing layer 815 is laminated on the lower surface of the lower substrate 811 in the form of a film not in a linear lattice structure. Since the lower polarizer layer 815 is not a structure directly related to the implementation of the touch screen, it is not necessarily required to have a linear lattice structure.

In the above embodiments, the case where the structure of the touch screen is installed on the upper substrate of the display panel, that is, the substrate relatively close to the user has been described. The reason why the structure of the touch screen is not installed on the lower substrate relatively far from the user than the upper substrate is that the touch sensing is not easy because the electromagnetic field formed for the touch sensing is separated from the touch position of the user. The thickness of the liquid crystal layer is, for example, about 5 micrometers. Considering the total sum of all the thicknesses of the liquid crystal layer, the upper polarizing layer and the upper substrate, the top plate surface of the upper substrate, which the user touches, . Accordingly, it is preferable that the structure of the touch screen is implemented in the upper substrate rather than the lower substrate of the display panel.

However, if the thickness of the liquid crystal layer is sufficiently reduced to 3 micrometers or less or the level of the voltage for touch sensing is raised, it is also possible to design the linear grating of the lower polarizing layer to perform the role of the wiring layer of the touch screen. Hereinafter, such an embodiment will be described.

22 is a side sectional view showing a laminated structure of a display panel 910 of a display device 900 according to a ninth embodiment of the present invention.

22, the display device 900 according to the ninth embodiment includes a display panel 910 and a backlight unit 920 for providing light to the display panel 910. [

The display panel 910 includes a lower substrate 911, an upper substrate 912 disposed to face the lower substrate 911, a liquid crystal layer 913 filled between the lower substrate 911 and the upper substrate 912, A color filter layer 914 interposed between the liquid crystal layer 913 and the lower substrate 911, a lower polarizing layer 915 disposed on the upper surface of the lower substrate 911, And a top polarizing layer 916 disposed on the bottom surface. The lower polarizing layer 915 and the upper polarizing layer 916 both have a linear lattice structure, and the extending directions of the linear lattices are orthogonal to each other.

In this embodiment, the upper polarizer layer 916 is one of a transmission wiring layer and a reception wiring layer of a touch screen structure, and the lower polarizer layer 915 is another one of a transmission wiring layer and a reception wiring layer. The upper polarizing layer 916 serves as a transmission wiring layer and the lower polarizing layer 915 serves as a receiving wiring layer. However, in order to improve the touch sensitivity, the upper polarizing layer 916 serves as a receiving wiring layer and the lower polarizing layer 915 serves as a light- Is preferably a transmission wiring layer.

In this case, an electromagnetic field is formed between the lower polarizing layer 915 and the upper polarizing layer 916 by applying a voltage for touch sensing to the metal layer of the lower polarizing layer 915. In this state, when a user touches one position of the upper substrate 912, a part of the electromagnetic field is absorbed by the user at the corresponding position. Accordingly, a change occurs in the voltage output from the metal layer of the upper polarizing layer 916 corresponding to the position. The display device 900 can specify coordinates of the touch position based on this.

Here, whether or not the linear grating of the lower polarizing layer 915 and the linear grating of the upper polarizing layer 916 are located within the range of the electromagnetic field by the touch sensing voltage is primarily determined by the level of the voltage for touch sensing . The thickness of the liquid crystal layer 913 is determined such that the distance between the linear grating of the lower polarizing layer 915 and the linear grating of the upper polarizing layer 916 is less than the allowable distance determined by the level of the voltage for touch sensing.

23 is a flowchart illustrating a process of detecting coordinates of a touch position by a display device according to the ninth embodiment of the present invention. The structure of the display device in which this process is executed is as described with reference to FIG.

As shown in FIG. 23, in step S210, the display device applies a voltage pulse for sensing to each metal layer of the lower polarizer layer 950. FIG.

In step S220, an electromagnetic field is formed between the lower polarizing layer 950 and the upper polarizing layer 960 by a voltage pulse applied to the lower polarizing layer 950.

In step S230, a predetermined voltage is output from each metal layer of the upper polarizing layer 960 due to the electromagnetic field.

In step S240, the user touches one position on the upper substrate 920.

In step S250, some charges are absorbed by the user from the electromagnetic field at the touch position, thereby causing a change in the output voltage in the metal layer of the upper polarizing layer 960 corresponding to the touch position.

In step S260, the display device specifies a metal layer in which the output voltage changes, and determines coordinates of the touch position based on the identified metal layer.

The seventh embodiment (see FIG. 20) and the eighth embodiment (see FIG. 21) have described the case where the wiring layer is interposed between the upper polarizing layer and the liquid crystal layer, that is, the wiring layer is provided in the display panel. When the wiring layer is provided in the display panel, there is no need to turn the upper substrate upside down in the manufacturing step, which is advantageous in that the manufacturing process is relatively convenient. However, if the touch sensitivity is to be increased even if a process of reversing the upper substrate is added, the wiring layer may be provided outside the display panel. Hereinafter, such an embodiment will be described.

FIG. 24 is a side cross-sectional view showing a laminated structure of a display panel 1010 of a display device 1000 according to a tenth embodiment of the present invention.

As shown in Fig. 24, the display device 1000 according to the tenth embodiment includes a display panel 1010 and a backlight unit 1020 that provides light to the display panel 1010. Fig.

The display panel 1010 includes a lower substrate 1011, an upper substrate 1012 disposed to face the lower substrate 1011, a liquid crystal layer 1013 filled between the lower substrate 1011 and the upper substrate 1012, A color filter layer 1014 interposed between the liquid crystal layer 1013 and the lower substrate 1011, a lower polarizing layer 1015 disposed on the upper surface of the lower substrate 1011, And an upper polarizing layer 1016 disposed on the lower plate surface.

The display panel 1010 includes a wiring layer 1017 stacked on the upper surface of the upper substrate 1012 so as to correspond to the upper polarizer layer 1016 for touch sensing and an insulating layer 1018).

The upper polarizing layer 1016 is stacked on the lower plate surface of the upper substrate 1012 facing the liquid crystal layer 1013 and the wiring layer 1017 is formed on the opposite side of the lower plate surface of the upper substrate 1012 And is stacked on the top plate surface. In this case, since the upper substrate 1012 serves to insulate the upper polarizing layer 1016 and the wiring layer 1017, the insulating layer 1018 can be reduced to one as compared with the seventh embodiment. In addition, since the position where the electromagnetic field is formed is formed above the seventh embodiment, the touch sensitivity can be improved.

25 is a side cross-sectional view showing a laminated structure of a display panel 1110 of a display device 1100 according to an eleventh embodiment of the present invention.

As shown in Fig. 25, a display device 1100 according to the eleventh embodiment includes a display panel 1110 and a backlight unit 1120 that provides light to the display panel 1110. Fig.

The display panel 1110 includes a lower substrate 1111, an upper substrate 1112 disposed to face the lower substrate 1111, a liquid crystal layer 1113 filled between the lower substrate 1111 and the upper substrate 1112, A color filter layer 1114 interposed between the liquid crystal layer 1113 and the lower substrate 1111, a lower polarizing layer 1115 disposed on the lower surface of the lower substrate 1111, And an upper polarizing layer 1116 disposed on the lower plate surface.

The display panel 1110 includes a wiring layer 1117 stacked on the upper surface of the upper substrate 1112 so as to correspond to the upper polarizer layer 1116 for touch sensing and an insulating layer 1117 laminated on the wiring layer 1117 1118).

The lower polarizing layer 1115 in the present embodiment is laminated on the lower surface of the lower substrate 1111 in the form of a film not in a linear lattice structure. The upper polarizing layer 1116 is laminated on the lower plate surface of the upper substrate 1112 facing the liquid crystal layer 1113 and the wiring layer 1117 is laminated on the upper plate surface opposite to the lower plate surface of the upper substrate 1112 Respectively.

Thus, in this embodiment, the number of the insulating layers 1118 can be reduced to one, and the touch sensitivity can be relatively improved, compared with the seventh embodiment.

In the embodiments described above, the case of implementing the touch screen on the liquid crystal display panel as the light receiving element has been described. However, since the linearly polarized polarizer can be used in a display panel to which a light emitting device such as an OLED is applied, the idea of the present invention can also be implemented in a display panel which is a light emitting device.

Before explaining this embodiment, an example in which a linear grating polarizer is applied to a display panel to which a light emitting element is applied will be described first.

FIG. 26 is a side cross-sectional view showing a stacked structure of a display panel 1210 in a display device 1200 according to a twelfth embodiment of the present invention.

As shown in Fig. 26, the display device 1200 according to the twelfth embodiment includes a display panel 1210. Fig. Since the display panel 1210 of this embodiment generates light on its own, the display device 1200 does not have a separate backlight unit for providing light to the display panel 1210.

The display panel 1210 includes a lower substrate 1211, an upper substrate 1212 disposed to face the lower substrate 1211, a lower electrode layer 1213 stacked on the upper surface of the lower substrate 1211, An upper electrode layer 1214 stacked on the lower plate surface of the upper substrate 1212 so as to face the electrode layer 1213 and a light emitting layer 1215 interposed between the lower electrode layer 1213 and the upper electrode layer 1214, An electron transport layer 1216 interposed between the lower electrode layer 1213 and the light emitting layer 1215, a hole transport layer 1217 interposed between the light emitting layer 1215 and the upper electrode layer 1214, And a polarizing layer 1218 of a linear lattice structure sandwiched between the electrode layers 1214.

In the following description, the upper / upper and lower / lower representations are for indicating a relative arrangement or stacking relationship among the components along the traveling direction of the outgoing light emitted from the display panel 300. For example, when the light generated in the display panel 1210 is emitted to the upper side of the display panel 1210 in the drawing, the display panel 1210 includes a lower electrode layer 1213, A light emitting layer 1215, a hole transporting layer 1217, an upper electrode layer 1214, a polarizing layer 1218 and an upper substrate 1212 are sequentially stacked.

Hereinafter, a structure in which an image is displayed on the display panel 1210 will be described.

The lower electrode layer 1213 and the upper electrode layer 1214 are each implemented as a cathode and an anode layer. Electrons are generated in the lower electrode layer 1213 and holes are generated in the upper electrode layer 1214 as voltages of (-) and (+) are applied to the lower electrode layer 1213 and the upper electrode layer 1214, respectively. The electron transport layer 1216 transfers the electrons of the lower electrode layer 1213 to the light emitting layer 1215 and the hole transport layer 1217 transfers the holes of the upper electrode layer 1214 to the light emitting layer 1215.

Electrons and holes transferred to the light-emitting layer 1215 in this manner form an exciton in the light-emitting layer 1215. Excitons refer to neutral particles that are a combination of electrons and holes that are freely movable in a non-metallic crystal as a unit. The excitons generate light when the excitons are changed from the excited state to the ground state, and accordingly the light emitting layer 1215 generates and emits light.

In OLED panel structures, the light emitting layer generates light in two ways. One is a case where white light is generated in the light emitting layer, and in this case, a color filter layer for converting white light into RGB color light is required above the light emitting layer.

The other is a case where the light emitting layer is divided into subpixel units, each of which generates RGB color. In this case, since the light for each color is emitted from the light emitting layer, no separate color filter layer is required. The light emitting layer 1215 according to the present embodiment is configured such that the light emitting layer 1215 generates light of RGB colors, and a separate color filter layer is not applied to the display panel 1210.

In order to improve the luminous efficiency of the light-emitting layer 1215, it can be achieved by improving the amount of generated holes or electrons or the amount of electrons to be transferred. The display panel 1210 includes an electron injection layer (not shown) interposed between the lower electrode layer 1213 and the electron transport layer 1216, a hole transport layer 1217, And a hole injection layer (not shown) interposed between the first electrode 1214 and the second electrode 1214.

The polarizing layer 1218 includes a linear grating extending in one direction. Since the structure and function of the polarizing layer 1218 are substantially the same as those of the above-described embodiments, detailed description will be omitted. Unlike the case of the liquid crystal display panel, the display panel 1210 of this embodiment requires only the polarizing layer 1218 disposed on the upper side of the light emitting layer 1215.

Hereinafter, an embodiment of implementing a touch screen on the display panel 1210 having such a structure will be described.

FIG. 27 is a side cross-sectional view showing a stacked structure of a display panel 1310 in a display device 1300 according to a thirteenth embodiment of the present invention.

27, the display panel 1310 of the display device 1300 according to the thirteenth embodiment includes a lower substrate 1311, an upper substrate 1312 disposed to face the lower substrate 1311, A lower electrode layer 1313 stacked on the upper plate surface of the lower substrate 1311 and an upper electrode layer 1314 stacked on the lower plate surface of the upper substrate 1312 to face the lower electrode layer 1313, A light emitting layer 1315 interposed between the lower electrode layer 1313 and the upper electrode layer 1314 and an electron transporting layer 1316 interposed between the lower electrode layer 1313 and the light emitting layer 1315, A hole transport layer 1317 interposed between the upper substrate 1312 and the upper electrode layer 1314 and a polarizing layer 1318 of a linear lattice structure interposed between the upper substrate 1312 and the upper electrode layer 1314. [

The display panel 1310 includes a wiring layer 1321 interposed between the polarizing layer 1318 and the upper electrode layer 1314 so as to correspond to the polarizing layer 1318 for touch sensing and a polarizing layer 1318 and a wiring layer 1321 And a second insulating layer 1323 sandwiched between the wiring layer 1321 and the upper electrode layer 1314. The first insulating layer 1322 is interposed between the upper electrode layer 1314 and the wiring layer 1321,

The polarizing layer 1318 is either a transmission wiring layer or a reception wiring layer of a touch screen, and the wiring layer 1321 is a transmission wiring layer or a reception wiring layer. The principle of touch detection by the polarizing layer 1318 and the wiring layer 1321 is as described in the above embodiments.

28 is a side cross-sectional view showing a stacked form of the display panel 1410 in the display device 1400 according to the fourteenth embodiment of the present invention.

28, the display panel 1410 of the display device 1400 according to the fourteenth embodiment includes a lower substrate 1411, an upper substrate 1412 disposed to face the lower substrate 1411, A lower electrode layer 1413 laminated on the upper plate surface of the lower substrate 1411 and an upper electrode layer 1414 laminated on the lower plate surface of the upper substrate 1412 to face the lower electrode layer 1413, A light emitting layer 1415 interposed between the lower electrode layer 1413 and the upper electrode layer 1414 and an electron transport layer 1416 interposed between the lower electrode layer 1413 and the light emitting layer 1415; A hole transport layer 1417 interposed between the upper substrate 1412 and the upper electrode layer 1414 and a polarizing layer 1418 of a linear lattice structure interposed between the upper substrate 1412 and the upper electrode layer 1414.

The display panel 1410 includes a wiring layer 1421 stacked on the upper surface of the upper substrate 1412 so as to correspond to the polarizing layer 1418 for touch sensing and an insulating layer 1422 stacked on the wiring layer 1421. [ ).

The polarizing layer 1418 is stacked on the lower plate surface of the upper substrate 1412 facing the light emitting layer 1415 and the wiring layer 1421 is formed on the upper plate surface 1412 opposite to the lower plate surface of the upper substrate 1412. In this embodiment, . In this case, since the upper substrate 1412 serves to insulate the polarizing layer 1418 and the wiring layer 1421, the insulating layer 1422 can be reduced to one as compared with the thirteenth embodiment. In addition, since the position where the electromagnetic field is formed is formed above the thirteenth embodiment, the touch sensitivity can be improved.

Hereinafter, an embodiment of a display device to which the display panel according to the above embodiments is applied will be described.

FIG. 29 is a block diagram of a configuration of a display device 1500 according to a fifteenth embodiment of the present invention.

29, the display device 1500 according to the fifteenth embodiment can be implemented as an electronic device capable of displaying images such as TVs, tablets, mobile phones, multimedia players, electronic frames, and digital billboards.

The display device 1500 includes a signal receiving unit 1510 that receives a transport stream of video content from the outside, a display unit 1520 that displays an image based on the video data of the transport stream received by the signal receiving unit 1510, A speaker unit 1530 for outputting voice based on the voice data of the transport stream received by the receiving unit 1510, a user input unit 1540 for performing an input operation by the user, a storage unit 1550 for storing data, And a signal processing unit 1560 for controlling and operating all the operations of the display apparatus 1500.

The signal receiving unit 1510 receives a transport stream transmitted from various image sources. The signal receiving unit 1510 can not only receive signals transmitted from the outside, but can also perform bi-directional communication by transmitting signals to the outside. The signal receiving unit 1510 is implemented by a communication port or an aggregate of communication modules corresponding to a plurality of communication standards, and the supportable protocol and communication connection objects are not limited to any one type or format. For example, the signal receiving unit 1510 may include an RFIC (not shown) for receiving RF signals, a WiFi communication module (not shown) for wireless network communication, an Ethernet module (not shown) for wired network communication, And a USB port (not shown) for local connection, etc.

The display unit 1520 displays a video signal processed by the signal processing unit 1560 as an image. The implementation of the display unit 1520 is not limited, and includes a display panel having a structure as described in the previous embodiments. In addition to the display panel, the display unit 1520 may additionally include an additional configuration depending on the implementation method of the panel. For example, in the case of a liquid crystal type, the display unit 1520 includes a liquid crystal display panel (not shown), a backlight unit (not shown) for supplying light to a liquid crystal display panel (not shown), a liquid crystal display panel (Not shown) for driving the panel driving board (not shown).

The speaker 1530 outputs the voice signal processed by the signal processor 1560 by voice. The speaker 1530 transmits the voice on the principle of changing the air pressure by vibrating the air according to the voice signal. The speaker 1530 includes a unit speaker corresponding to a voice signal of a certain channel, and may include a plurality of unit speakers corresponding to voice signals of a plurality of channels.

The speaker 1530 has various types according to the frequency band of the output voice. The speaker 1530 may be a subwoofer corresponding to a band of 20Hz to 99Hz, a woofer of 100Hz to 299Hz band, a mid-woofer of 300Hz to 499Hz band, a midwoofer of 500Hz to 2.9KHz band, A mid-range speaker, a tweeter speaker of 3 KHz to 6.9 KHz band, a super-tweeter speaker of 7 KHz to 20 KHz band, and the like. .

The user input unit 1540 transmits various preset control commands or information to the signal processing unit 1560 according to the user's operation or input. The user input unit 1540 transmits various events generated by a user's operation to the signal processing unit 1560 according to a user's intention. The user input unit 1540 may be implemented in various forms according to the information input method. For example, the user input unit 1540 may include a button installed outside the display device 1500, a remote controller A touch screen integrated with the display unit 1520, or an input device provided to communicate with the display device 1500, or the like.

The storage unit 1550 stores various data according to the processing and control of the signal processing unit 1560. The storage unit 1550 is accessed by the signal processor 1560 to read, write, edit, delete, update, and the like data. The storage unit 1550 may be implemented as a nonvolatile memory such as a flash memory or a hard-disc drive so as to store data regardless of whether the system power of the display apparatus 1500 is provided or not. do.

The signal processor 1560 performs various processes on the transport stream received by the signal receiver 1510. When a signal is received in the signal receiving unit 1510, the signal processing unit 1560 performs an image processing process on the video signal extracted from the transport stream, and outputs the processed video signal to the display unit 1520, The display unit 1520 displays the image.

The type of the image processing process performed by the signal processing unit 1560 is not limited. For example, the image processing unit 1560 may perform demultiplexing to divide an input transport stream into respective lower streams of a video signal, a voice signal, Decoding corresponding to an image format of a signal, de-interlacing for converting an interlaced video signal into a progressive mode, scaling for adjusting a video signal to a preset resolution, And may include noise reduction, detail enhancement, frame refresh rate conversion, and the like for image quality improvement.

Since the signal processor 1560 can perform various processes according to the types and characteristics of signals or data, the processes that can be performed by the signal processor 1560 can not be limited to the image processing processes, Data can not be limited to being received by the signal receiving unit 1510. [ For example, the signal processing unit 1560 performs a voice processing process on the voice signal extracted from the transport stream, and outputs the voice signal on which the process is performed to the speaker 1530. Alternatively, the signal processing unit 1560 processes the corresponding utterance according to a predetermined speech recognition process when the user's utterance is input to the display apparatus 1500. The signal processor 1560 may be implemented as a system-on-chip (SOC) that integrates various functions or may be implemented by a separate chip-set capable of independently performing each process on a printed circuit board Processing board (not shown).

The hardware configuration of the display device 1500 may vary according to the form in which the display device 1500 is implemented and the functions supported by the display device 1500. For example, if the display device 1500 is a TV or a set-top box, a configuration for tuning a broadcast signal to a specific frequency is required. However, if the display device 1500 is a tablet, the configuration may be excluded.

Hereinafter, the specific configuration of the signal processing unit 1560 when the display device 1500 is a TV will be described.

30 is a block diagram of the configuration of the signal processing unit 1560. FIG. The signal processing unit 1560 in this figure shows only the basic structure actually implemented in the product, and when the display device 1500 is implemented as an actual product, the signal processing unit 1560 additionally includes a configuration other than that described in this embodiment.

As shown in FIG. 30, the signal receiving unit 1510 includes a tuner 1511 for tuning a received broadcast stream to a specific frequency. The signal processor 1560 includes a demux 1561 for dividing a broadcast stream transmitted from the tuner 1511 into a plurality of sub signals and outputting the demultiplexed signal, A video processor 1563 for processing a signal according to an image processing process and outputting the processed signal to a display unit 1520 and a speaker 1530 for processing a voice signal in a sub signal output from the demux 1561 according to a voice processing process And a central processing unit (CPU) 1567 for performing arithmetic operation and control for the operation of the signal processing unit 1560.

When a broadcast stream is received in an RF antenna (not shown), the tuner 1511 tunes the broadcast stream to a specified transport stream. The tuner 1511 converts a high-frequency carrier wave transmitted from an antenna (not shown) into an intermediate frequency band and converts it into a digital signal, thereby generating a transport stream. To this end, the tuner 1511 may have an A / D converter (not shown), which may be included in a demodulator (not shown), rather than a tuner 1511, It is possible.

The demux 1561 or demultiplexer 1561 basically performs the opposite function to the multiplexer (not shown). That is, the demux 1561 serves to distribute one input terminal to a plurality of output terminals, and outputs a stream input to the input terminal to each output terminal according to a selection signal. For example, if there are four output stages for one input stage, the demux 1561 can select each of the four output stages by combining the states of the two selection signals having a state of 0 or 1.

The demux 1561 separates the transport stream transmitted from the tuner 1511 into subsignals of a video signal and a voice signal, and outputs the demultiplexed signals to the respective output terminals, particularly when applied to the display device 1500.

For example, the demultiplexer 1561 demultiplexes a packet (PID), which is an identifier assigned to each packet in the transport stream, identifies the transport stream as each sub-signal. Sub-signals for each channel in the transport stream are independently compressed and packetized, and packets corresponding to one channel are assigned to the same PID, thereby being distinguished from packets of other channels. The demux 1561 classifies packets by PID in the transport stream and extracts sub-signals having the same PID.

The image processor 1563 decodes and scales the image signal output from the demux 1561 and outputs the decoded image signal to the display unit 1520. To this end, the image processor 1563 includes a decoder (not shown) for restoring the video signal to a state before encoding by performing the encoding process on the video signal encoded in the specific format in reverse, And a scaler (not shown) for scaling the video signal to a resolution of the display unit 120 or a separately specified resolution. If the video signal output from the demux 1561 is in a non-compressed state in which the video signal is not encoded in a specific format, the video processor 1563 does not perform processing by the decoder (not shown) for the video signal.

The audio processing unit 1565 amplifies the audio signal output from the demux 1561 and outputs the amplified audio signal to the speaker 1530. To this end, the voice processing unit 1565 is provided with a digital signal supply unit (not shown) for outputting a digital signal as a voice signal, a pulse width modulation (PWM) (Not shown) for amplifying the PWM signal output from the PWM processing unit (not shown), and a PWM unit (not shown) for amplifying the PWM signal amplified by the amplification unit And an LC filter (not shown) that demodulates the PWM signal by filtering in the waveband.

The CPU 1567 performs a central operation for operating all the components in the signal processor 1560, and basically plays a central role in interpreting and calculating data. The CPU 1567 internally includes a processor register (not shown) in which instructions to be processed are stored, an arithmetic logic unit (ALU) (not shown) responsible for comparison, determination, and operation, A control unit (not shown) for internally controlling the CPU 1567 for proper execution, an internal bus BUS (not shown), a cache (not shown), and the like.

The CPU 1567 performs necessary calculations for operations of the respective components of the signal processor 1560 such as the demultiplexer 1561, the video processor 1563 and the audio processor 1565. [ Depending on the design method of the signal processing unit 1560, the signal processing unit 1560 may be configured to operate without data operation of the CPU 1567 or to operate by a separate micro-controller (not shown) There may also be.

The methods according to exemplary embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. Such computer readable media may include program instructions, data files, data structures, etc., alone or in combination. For example, the computer-readable medium may be a volatile or non-volatile storage device, such as a storage device such as a ROM, or a memory such as a RAM, a memory chip, a device, or an integrated circuit, whether removable or rewritable. , Or a storage medium readable by a machine (e.g., a computer), such as a CD, a DVD, a magnetic disk, or a magnetic tape, as well as being optically or magnetically recordable. It will be appreciated that the memory that may be included in the mobile terminal is an example of a machine-readable storage medium suitable for storing programs or programs containing instructions for implementing the embodiments of the present invention. The program instructions recorded on the storage medium may be those specially designed and constructed for the present invention or may be those known to those skilled in the art of computer software.

The above-described embodiments are merely illustrative, and various modifications and equivalents may be made by those skilled in the art. Accordingly, the true scope of protection of the present invention should be determined by the technical idea of the invention described in the following claims.

500, 710: Display panel
510, 711, 712: substrate
530, 715, 716: Polarizing layer
540, 717: wiring layer
550, 560, 718, 719: insulating layer

Claims (18)

In the display panel,
Claims [1]
A polarizing layer including a plurality of linear gratings arranged in parallel along the first direction on the substrate, for polarizing light emitted to the substrate through the slits between the plurality of linear gratings and outputting the polarized light;
A wiring layer including a plurality of wirings arranged in parallel along a second direction different from the first direction;
A plurality of linear gratings and a plurality of wires, a plurality of linear gratings, and a plurality of wires, wherein the plurality of linear gratings and an output And a circuit section for determining a position of the touch operation based on a change in voltage. The method according to claim 1,
Wherein the linear grating has a metal layer for reflecting light emitted to the substrate,
The metal layer may be arranged such that the touch sensing voltage is applied from the circuit unit to generate the output voltage from the plurality of wires or the output voltage is generated in response to the touch sensing voltage applied to the plurality of wires. And the display panel. The method according to claim 1,
Wherein the polarizing layer is formed on a lower surface of the substrate so as to face the light emitted to the substrate, and is interposed between the substrate and the wiring layer. The method according to claim 1,
Wherein the polarizing layer is formed on the lower plate surface of the substrate so as to face the light irradiated to the substrate and the wiring layer is disposed on the upper plate surface of the substrate opposite to the lower plate surface of the substrate. . The method according to claim 1,
Wherein the circuit unit applies the touch sensing voltage to the metal layers of the plurality of linear gratings and the position of the touch operation is determined according to the position of the wiring where the output voltage varies among the plurality of wiring lines. Display panel. The method according to claim 1,
Wherein the circuit section applies the touch sensing voltage to the plurality of wires and the position of the touch operation is determined according to the position of the metal layer in which the output voltage varies among the metal layers of the plurality of linear gratings Display panel. The method according to claim 1,
The substrate includes a first substrate and a second substrate facing each other,
Wherein the polarizing layer includes a first polarizing layer formed on the first substrate and a second polarizing layer formed on the second substrate facing the first polarizing layer,
Wherein the plurality of wirings of the wiring layer include the linear lattice of any one of the first polarizing layer and the second polarizing layer. 8. The method of claim 7,
And a liquid crystal layer interposed between the first substrate and the second substrate,
The thickness of the liquid crystal layer corresponds to a predetermined level of the touch sensing voltage so that the linear lattice of the first polarizing layer and the linear lattice of the second polarizing layer are located within the electromagnetic field range by the touch sensing voltage Is less than a predetermined allowable distance. The method according to claim 1,
Wherein the output voltage from the other one of the plurality of linear gratings and the plurality of wirings is generated by an electromagnetic field formed by the touch sensing voltage applied to any one of the plurality of linear gratings and the plurality of wirings Features a display panel. In the display device,
A display panel for displaying an image;
And a controller for determining a position of a user's touch operation on the display panel,
The display panel includes:
Claims [1]
A polarizing layer including a plurality of linear gratings arranged in parallel along the first direction on the substrate, for polarizing light emitted to the substrate through the slits between the plurality of linear gratings and outputting the polarized light;
A wiring layer including a plurality of wirings arranged in parallel along a second direction different from the first direction;
And a circuit for applying a voltage for touch sensing to any one of the plurality of linear grids and the plurality of wires,
Wherein the control unit determines the position of the touch operation based on a change in the output voltage from the other of the plurality of linear grids and the plurality of wires generated by the touch operation of the user. 11. The method of claim 10,
Wherein the linear grating has a metal layer for reflecting light emitted to the substrate,
The metal layer may be arranged such that the touch sensing voltage is applied from the circuit unit to generate the output voltage from the plurality of wires or the output voltage is generated in response to the touch sensing voltage applied to the plurality of wires. And the display device. 11. The method of claim 10,
Wherein the polarizing layer is formed on a lower surface of the substrate so as to face the light emitted to the substrate, and is interposed between the substrate and the wiring layer. 11. The method of claim 10,
Wherein the polarizing layer is formed on the lower plate surface of the substrate so as to face the light emitted to the substrate and the wiring layer is disposed on the upper plate surface of the substrate opposite to the lower plate surface of the substrate. . 11. The method of claim 10,
Wherein the circuit unit applies the touch sensing voltage to the metal layers of the plurality of linear gratings and the position of the touch operation is determined according to the position of the wiring where the output voltage varies among the plurality of wiring lines. / RTI > 11. The method of claim 10,
Wherein the circuit section applies the touch sensing voltage to the plurality of wires and the position of the touch operation is determined according to the position of the metal layer in which the output voltage varies among the metal layers of the plurality of linear gratings / RTI > 11. The method of claim 10,
The substrate includes a first substrate and a second substrate facing each other,
Wherein the polarizing layer includes a first polarizing layer formed on the first substrate and a second polarizing layer formed on the second substrate facing the first polarizing layer,
Wherein the plurality of wirings of the wiring layer include the linear lattice of any one of the first polarizing layer and the second polarizing layer. 17. The method of claim 16,
Wherein the display panel further comprises a liquid crystal layer interposed between the first substrate and the second substrate,
The thickness of the liquid crystal layer corresponds to a predetermined level of the touch sensing voltage so that the linear lattice of the first polarizing layer and the linear lattice of the second polarizing layer are located within the electromagnetic field range by the touch sensing voltage Is less than a predetermined allowable distance. 11. The method of claim 10,
Wherein the output voltage from the other one of the plurality of linear gratings and the plurality of wirings is generated by an electromagnetic field formed by the touch sensing voltage applied to any one of the plurality of linear gratings and the plurality of wirings .

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