KR20070010573A - Hybrid type polarizing film, method for manufacturing thereof and display device having the same - Google Patents

Abstract

A hybrid polarization film, a manufacturing method thereof, and a display device including the same are provided to have a sound output function by including a speaker film. A polarization film(110) includes a polarizer layer transmitting light of incident light having an axis parallel to a polarization axis. A speaker film(130) is disposed on the polarization film and radiates a sound wave by converting an electric signal to vibrations. A vibration activating layer(120) is interposed between the polarization film and the speaker film, and activates vibration of the speaker film. Line units (151,152) are electrically connected to the speaker film, and transmits the electric signal. The speaker film includes first and second electrodes receiving the electric signal, and a piezoelectric film interposed between the first and second electrodes.

Description

HYBRID TYPE POLARIZING FILM, METHOD FOR MANUFACTURING THEREOF AND DISPLAY DEVICE HAVING THE SAME

1 is a schematic cross-sectional view of a hybrid polarizing film according to an embodiment of the present invention.

2 is a schematic cross-sectional view of a hybrid polarizing film according to another embodiment of the present invention.

3A to 3E are flowcharts illustrating a method of manufacturing the hybrid polarizing film illustrated in FIG. 1.

4A and 4B are process diagrams according to an embodiment of forming the vibrating active layer of FIG. 1.

5A and 5B are process diagrams according to another exemplary embodiment of forming the vibrating active layer of FIG. 1.

6A and 6B are process diagrams according to still another embodiment of forming the vibrating active layer of FIG. 1.

7 is a flow chart according to another embodiment of forming the vibration active layer of FIG.

8 is a plan view of a display panel module according to another exemplary embodiment of the present invention.

FIG. 9 is a cross-sectional view taken along the line II ′ of FIG. 1.

10A and 10B are conceptual diagrams for describing an optical path according to an operation mode of the display panel module illustrated in FIG. 8.

11 is a plan view of a display panel module according to still another embodiment of the present invention.

12 is a cross-sectional view taken along the line II-II 'shown in FIG. 11.

13 is a schematic block diagram of a display device according to still another embodiment of the present invention.

FIG. 14 is a detailed block diagram of the sound source output unit illustrated in FIG. 13.

<Description of Symbols for Main Parts of Drawings>

110, 210: polarizing film 120, 220: vibration active layer

130, 230: speaker film 151, 152: wiring section

400: display panel 510: timing controller

520: voltage generator 530: reference gamma voltage generator

540: source driver 550: gate driver

570: display unit

The present invention relates to a hybrid polarizing film, a manufacturing method thereof, and a display device having the same, and more particularly, to a hybrid polarizing film having a sound output function, a manufacturing method thereof, and a display device having the same.

In general, display devices include a cathode ray tube (CRT), a plasma display panel (PDP), a liquid crystal display (LCD), and the like. In recent years, liquid crystal displays (LCDs) having light weight and miniaturization characteristics have been widely used, ranging from portable terminals to large televisions, according to consumer preferences.

Compared with the lighter and smaller display device as described above, the acoustic device employs a magnet-driven speaker using a magnet, a coil, and a diaphragm. However, the speaker of the magnetic drive method has a limitation in miniaturization and light weight. When the thickness of the magnet is reduced or the thickness of the diaphragm is reduced to achieve miniaturization and light weight, there is a problem in that sound quality is degraded.

Accordingly, there is a demand for the development of an acoustic device suitable for a display device having disadvantages of miniaturization and light weight.

Therefore, the technical problem of the present invention was conceived in this respect, the object of the present invention is to provide a hybrid polarizing film having a sound output function.

Another object of the present invention is to provide a method for producing the hybrid polarizing film.

Still another object of the present invention is to provide a display device including the hybrid polarizing film.

Hybrid type polarizing film according to an embodiment for realizing the above object of the present invention includes a polarizing film, a speaker film, a vibration active layer and a wiring portion. The polarizing film includes a polarizer layer for transmitting light having an axis parallel to the polarization axis among incident light. The speaker film is disposed on the polarizing film, and converts an electrical signal into vibration to emit sound waves. The vibration active layer is interposed between the polarizing film and the speaker film to activate vibration of the speaker film. The wiring unit is electrically connected to the speaker film to transmit the electric signal.

According to another aspect of the present invention, there is provided a method of manufacturing a hybrid polarizing film, including: manufacturing a polarizing film fabric including a polarizer layer, forming a vibration active layer on the fabric of the polarizing film; Bonding a speaker film fabric to the vibration active layer, cutting the first product bonded to the speaker film fabric corresponding to the size of the display panel, and at one end of the vibration active layer of the cut second product Forming a connecting portion connected to the first electrode of the first adhesive layer; bonding a transparent protective film coated with a conductive adhesive onto the second electrode of the speaker film; and first wirings and second connecting the connecting portion and the conductive adhesive, respectively. Forming a wiring.

According to another aspect of the present invention, a display device including a display panel including a source wire and a switching element connected to a gate wire includes a source driver, a gate driver, a sound source output unit, and a polarizing member. do. The source unit converts the input first data signal into an analog second data signal and outputs the converted second data signal to the source wiring line. The gate driver outputs a gate signal to the gate wiring. The sound source output unit converts the input first sound source signal into a second sound source signal and outputs the second sound source signal. The polarizing member is disposed on one surface of the display panel to transmit light parallel to the polarization axis and output an acoustic signal in response to the second sound source signal.

According to such a hybrid polarizing film, a manufacturing method thereof, and a display device having the same, the polarizing film has an audio output function, and the display device employing the polarizing film can achieve a light output function as well as light and small size.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention.

1 is a schematic cross-sectional view of a hybrid polarizing film according to an embodiment of the present invention.

Referring to FIG. 1, the hybrid type polarizing film 100 includes a transmission type polarizing film 110, a vibration active layer 120, a speaker film 130, a protective film 140, and wiring portions 151 and 152.

The transmissive polarizing film 110 may include a pressure sensitive adhesive layer (PSA) 111, a first protective layer (TAC; Triacetylcellulose) 112, a polarizer layer (PVA), and a polyvinylalcohol (113). A protective layer (TAC; Triacetylcellulose) 114 is included.

The pressure sensitive adhesive layer 111 is in the form of a film including an adhesive, and is adhered by a pressure provided from the outside. As the pressure sensitive adhesive, an acrylic or rubber pressure sensitive adhesive, or an adhesive containing fine particles such as zirconia in order to adjust the refractive index of the pressure sensitive adhesive can be used.

The first and second protective layers 112 and 114 are disposed on both surfaces of the polarizer layer 113, respectively, and are made of a transparent material. As the first and second protective layers 112 and 114, an acetate-based resin such as triacetelcellulose (TAC) is generally used, but is not limited thereto. The transparent protective film which can be preferably used from the point of polarization characteristic, durability, etc. is a triacetyl cellulose film which saponified the surface with alkali etc.

The polarizer layer 113 divides incident light into two polarization components orthogonal to each other, transmits only one of them, and absorbs or disperses the other components. That is, only light having an optical axis parallel to the polarization axis is transmitted.

The vibration active layer 120 is formed on the second protective layer 114. That is, it is formed through the surface treatment technology on the second protective layer 114, and activates the vibration of the speaker film 130. The vibration active layer 120 includes an air layer or is formed of a material having elasticity. One end of the vibration active layer 120 has a conductor 121 electrically connected to the first metal electrode of the speaker film 130.

The speaker film 130 may include the first metal electrode 132 formed on the piezoelectric film 131 and the first surface of the piezoelectric film 131, and the second metal electrode formed on the second surface of the piezoelectric film 131. 133.

The piezoelectric film 131 emits sound waves by converting it into mechanical vibration, which is an electrical signal. The piezoelectric film 321 is formed of polyvinyliden fluoride (PVDF) and derivatives thereof.

In addition, it may be formed by selecting from a group consisting of PVDF-HFP polymer mixture (blend) and VDF / TrFE (Vinylidenefluoride / Trifluorethylene) containing an additive such as HFP (hexafluoropropylene). Electrical signals are applied to the first and second metal electrodes 132 and 133, and the piezoelectric film 131 is driven to emit sound waves.

The first and second metal electrodes 132 and 133 are coated on the first and second surfaces of the piezoelectric film 131 with a transparent conductive material. The transparent conductive material may be Indium-Tin-Oxide (ITO), Indium-Zinc-Oxide (IZO) or Indium-Tin-Zinc-Oxide It includes.

The protective film 142 is formed of a transparent material coated with a conductive adhesive 141 on one surface. The protective film 142 contacts the second metal electrode 133 of the speaker film 130 through the conductive adhesive 141, and extends a predetermined length from one end of the speaker film 130.

The wiring units 151 and 152 may include the first wiring 151 electrically connected to the first metal electrode 132 of the speaker film 130 and the second metal electrode 133 of the speaker film 130. The second wire 152 is in electrical contact.

The first wire 151 is in contact with the conductor 121 in contact with the first metal electrode 132, and the second wire 152 is in contact with the second metal electrode 133. ). That is, the first and second wires 151 and 152 apply sound source signals to the first and second metal electrodes 132 and 133 of the speaker film 130.

2 is a schematic cross-sectional view of a hybrid polarizing film according to another embodiment of the present invention.

Referring to FIG. 2, the hybrid polarizing film 200 includes a reflection-transmissive polarizing film 210, a vibrating active layer 220, a speaker film 230, a protective film 240, and wiring portions 251 and 252. Include.

The transflective polarizing film 210 may include a first pressure sensitive adhesive layer (PSA) 211, a retardation layer 212, a second pressure sensitive adhesive layer (PSA) 213, and a first protective layer (TAC) 214. ), A polarizer layer (PVA) 215, and a second protective layer (TAC) 216.

The first and second pressure sensitive adhesive layers 211 and 213 are formed in a film form including an adhesive, and are adhered by a pressure provided from the outside. As the pressure sensitive adhesive, an acrylic or rubber pressure sensitive adhesive, or an adhesive containing fine particles such as zirconia in order to adjust the refractive index of the pressure sensitive adhesive can be used.

The first and second protective layers 214 and 216 are disposed on both surfaces of the polarizer layer 215, respectively, and are formed of a transparent material. The first and second protective layers 214 and 216 are preferably formed of an acetate resin such as triacetelcellulose (TAC).

The polarizer layer 215 divides incident light into two polarization components orthogonal to each other, transmits only one of them, and absorbs or disperses the other components.

The retardation layer 212 functions to change the polarization state of incident light. That is, the linearly polarized light is changed into left or right circularly polarized light, or the left or right circularly polarized light is changed into linearly polarized light of 45 ° or 135 °.

The vibration active layer 220 is formed on the second protective layer 216. That is, formed on the second protective layer 216 through a surface treatment technology, it activates the vibration of the speaker film 230. The vibration active layer 220 includes an air layer or is formed of a transparent material having elasticity. One end of the vibration active layer 220 has a connecting portion 221, which is a conductor electrically connected to the first metal electrode of the speaker film 230.

The speaker film 230 includes a first metal electrode 232 formed on the piezoelectric film 231 and a first surface of the piezoelectric film 231, and a second metal electrode formed on a second surface of the piezoelectric film 231. 233.

The piezoelectric film 231 converts the mechanical vibration, which is an electrical signal, to emit sound waves. The piezoelectric film 321 is preferably formed of polyvinylidenfluoride (PVDF) and derivatives thereof.

An electrical signal is applied to the first and second metal electrodes 232 and 233, and drives the piezoelectric film 231 to emit sound waves.

The first and second metal electrodes 232 and 233 are coated on the first and second surfaces of the piezoelectric film 231 with a transparent conductive material.

The protective film 242 is formed of a transparent material coated with a conductive adhesive 141 on one surface. The protective film 242 is in contact with the second metal electrode 233 of the speaker film 230 through the conductive adhesive 241, and a predetermined length is extended from one end of the speaker film 230.

The wiring units 251 and 252 may include the first wiring 251 electrically contacting the first metal electrode 232 of the speaker film 230, and the second metal electrode 233 of the speaker film 230. The second wire 252 is in electrical contact.

The first wire 251 is in contact with the connection portion 221 electrically connected to the first metal electrode 232, and the second wire 252 is in contact with the second metal electrode 233. 241). That is, the first and second wires 251 and 252 are connected to the first and second metal electrodes 232 and 233 of the speaker film 230, respectively, to receive a sound source signal.

3A to 3E are flowcharts illustrating a method of manufacturing the hybrid polarizing film illustrated in FIG. 1.

Referring to FIGS. 1 and 3A, the transmissive polarizing film 110 is formed of roll-type rolled film, that is, a pressure-sensitive adhesive film 111, a first protective film 112, a polarizer film 113, and The second protective films 114 are laminated through a laminating apparatus to manufacture the first polarizing member F1.

Thereafter, the vibrating active layer 120 is formed on the first protective film 112 by using a surface treatment technique to manufacture the second polarizing member F2. The vibration active layer 120 is a layer for activating vibration of the speaker film 130 disposed on the polarizing film 110, and includes an embossing layer including an air layer and a bubble layer (or a bubble layer). Alternatively, the vibration active layer 120 is formed of a transparent material having elasticity including a spacer.

Referring to FIGS. 3B and 3C, the speaker film 130 made of fabric is bonded onto the second polarizing member F2 using a conductive adhesive to manufacture a third polarizing member F3. The film skipper 130 may include a first metal electrode 132 formed on the piezoelectric film 131 and a first surface of the piezoelectric film 131, and a second metal electrode formed on the second surface of the piezoelectric film 131. 133.

 Thereafter, the third polarizing member F3 having the speaker film 130 adhered to the polarizing film 110 is cut to fit the size of each corresponding display panel to manufacture the fourth polarizing member F4.

The liquid crystal conductor is injected into one end of the vibration active layer 120 to form a connection portion 121. The connection part 121 is in contact with the first metal electrode 132 of one end of the speaker film 130 to be electrically connected to the first metal electrode 132.

3D and 3E, a fifth polarizing member F5 is manufactured by attaching a protective film 142 having a conductive adhesive layer 141 formed on the fourth polarizing member F4.

The conductive adhesive layer 141 is in contact with the second metal electrode 133 of the speaker film 130, and the protective film 142 has an end extending in a predetermined length from the other end of the speaker film 130.

Thereafter, the first and second wires 151 and 152 formed of the metal material are connected to the connection part 121 formed at one end of the speaker film 130 and the end disposed at the other end of the speaker film 130, respectively. .

As a result, the first and second wires 151 and 152 are electrically connected to the first and second metal electrodes 132 and 133 of the speaker film 130 so that the sound source signal is input. Perform the input terminal function.

4A and 4B are process diagrams according to an embodiment of forming the vibrating active layer of FIG. 1.

4A and 4B, the synthetic resin 321 is coated on the protective layer TAC of the polarizing film 110. The synthetic resin 321 is pressurized using a mold 311 having an embossed engraved shape.

As a result, a vibrating active layer 322 having a raised embossed shape is formed. The vibration active layer 322 includes a convex portion 322a and a concave portion 322b, and an air layer is formed in the concave portion 332b.

The synthetic resin 331 is an acrylic ultraviolet curable resin, and photopolymerizable monomers such as acrylates, epoxy acrylates, polyester acrylates, urethane acrylates, oligomers, acetophenones, benzophenones, and thikes It includes a santon system.

5A and 5B are process diagrams according to another exemplary embodiment of forming the vibrating active layer of FIG. 1.

5A and 5B, a synthetic resin 323 is coated on the protective layer TAC of the polarizing film 110. Thereafter, the synthetic resin 323 is patterned using a mask 312 having an opening pattern to form a vibrating active layer 324.

The vibration active layer 324 includes a convex portion 324a and a concave portion 324b, and an air layer is formed in the concave portion 324b.

The synthetic resin 331 is an acrylic ultraviolet curable resin, and photopolymerizable monomers such as acrylates, epoxy acrylates, polyester acrylates, urethane acrylates, oligomers, acetophenones, benzophenones, and thikes It includes a santon system.

6A and 6B are process diagrams according to still another embodiment of forming the vibrating active layer of FIG. 1.

6A and 6B, a synthetic resin 325 is coated on the protective layer TAC of the polarizing film 110. In this way, a blowing agent (GAS) such as inert gas such as carbon dioxide or nitrogen is dissolved in the synthetic resin 325 in a high pressure state. The synthetic resin 325 mixed with the blowing agent is depressurized and heated. As a result, as the blowing agent in the synthetic resin 325 grows, bubbles 325a are generated.

As a result, the vibration active layer 325 having the bubbles 325a is formed on the protective layer TAC of the polarizing film 110.

7 is a flow chart according to another embodiment of forming the vibration active layer of FIG.

Referring to FIG. 7, a synthetic resin 327 is coated on the protective layer TAC of the polarizing film 110. The synthetic resin 327 includes a spacer 327a and is a transparent adhesive having elasticity.

The synthetic resin 327 maintains a gap between the speaker film 130 and the polarizing film 110 by the spacer 327a and vibrates generated from the speaker film 130 by the transparent adhesive having elasticity. Activate That is, the transparent adhesive serves as an air layer.

8 is a plan view of a display panel module according to another exemplary embodiment of the present invention. FIG. 9 is a cross-sectional view taken along the line II ′ of FIG. 1.

8 and 9, the display panel module includes a liquid crystal display panel and an upper polarizing member 200 and a lower polarizing member 210-1 disposed above and below the liquid crystal display panel 400, respectively. do.

The liquid crystal display panel 400 includes an array substrate 410, an opposing substrate 420 facing the array substrate 410, and a liquid crystal layer 430 interposed between the substrates 410 and 420. .

The array substrate 410 is a first base substrate on which gate lines Gn and source lines DLm-1, DLm, and DLm + 1, a storage common line 419, and a plurality of pixel portions P are formed. 401. The pixel portion P is formed on a switching element TFT, a pixel electrode 416 connected to the switching element TFT, and a portion of the pixel electrode 416 to reflect the RA and the transmission TA. It includes a reflective electrode 417 to define.

The switching element TFT may include a gate electrode 411 connected to a gate line GLn, a source electrode 413 connected to a data line DLm + 1, and a drain electrode 414 connected to the pixel electrode 416. Include.

A gate insulating layer 402 is formed on the gate line GLn, the gate electrode 411, and the storage common line 419. A channel layer 412 is formed on the gate insulating layer 402 between the gate electrode 411 and the source-drain electrodes 413 and 414. The channel layer 412 includes an amorphous silicon layer 412a and an in-situ doped n ⁺ amorphous silicon layer 412b.

The passivation layer 403 is formed on the data line DLm + 1, the source electrode 413, and the drain electrode 414. An organic layer 404 is formed on the passivation layer 403 corresponding to the reflector RA. The surface of the organic film 404 is preferably patterned into an uneven shape. The unevenness serves as a micro reflective lens in the reflecting part RA to scatter external light. Of course, the surface of the organic film may be planarized.

A portion of the passivation layer 403 and the organic layer 404 formed on the drain electrode 414 is removed to form a contact hole 415.

The pixel electrode 416 and the drain electrode 414 are electrically connected through the contact hole 415. The pixel electrode 416 is a transparent electrode that transmits light, and indium tin oxide (ITO) and indium zinc oxide (IZO) materials are used.

The reflective electrode 417 is partially formed on the pixel electrode 416 to define the reflective part RA. The reflective electrode 417 is a kind of metal pattern that reflects light, and aluminum or aluminum-neodymium alloy is used.

The opposing substrate 420 includes a second base substrate 421.

The light blocking layer 422 is formed on the second base substrate 421. The light blocking layer 422 is generally formed in an area corresponding to the source lines DLm-1, DLm, and DLm + 1 and the gate lines GLn of the array substrate 410.

In this case, the storage common wiring 419 formed under the source wirings DLm-1, DLm, and DLm + 1 may sufficiently cover each of the source wirings DLm-1, DLm, and DLm + 1. When formed to have a size of, the light blocking layer 422 may be formed only corresponding to the gate lines GLn.

The color filter layer 423 is formed on the second base substrate 421 on which the light blocking layer 422 is formed. The color filter layer 423 includes red, green, and blue filter patterns.

The color filter layer 423 is removed from a portion of the color filter layer 423, that is, a portion of the color filter layer 423 corresponding to the reflective part RA, to form a light hole LH. The overcoat layer 424 and the common electrode layer 425 are sequentially formed on the color filter layer 423.

The liquid crystal layer 430 has a first cell gap 2 Δnd corresponding to the transmissive part TA, and has a second cell gap Δnd corresponding to the reflective part RA. That is, in order to make the optical paths of the reflecting part RA and the transmitting part TA substantially the same, the cell gaps are formed differently. Herein, an example in which the cell gap is formed differently using the organic layer 404 on the array substrate 410 may be differently formed using the overcoating layer 424 of the counter substrate 420.

The upper polarizing member 200 is a reflection-transmissive polarizing member shown in FIG. 2.

Referring to FIG. 2, the upper polarizing member 200 includes a reflective-transmissive polarizing film 210, a vibrating active layer 220, a speaker film 230, a protective film 240, and wiring portions 251 and 252. do. The reflection-transmissive polarizing film 210 emits incident light by changing left or right polarized light in linearly polarized light or emits incident light by changing left or right polarized light in linearly polarized light.

The wiring units 251 and 252 electrically connected to the speaker film 230 are connected to output terminals of a sound source output unit (not shown) to receive a sound source signal which is an electrical signal. The speaker film 230 converts the sound source signal into mechanical vibration to emit sound waves.

The vibration active layer 220 is interposed between the reflection-transmissive polarizing film 210 and the speaker film 230 to activate the vibration of the speaker film 230 to improve sound quality and sound.

 The lower polarizing member 210-1 has the same component as the reflective-transmissive polarizing film 210. The lower polarizing member 210-1 emits incident light by changing left or right polarized light from linearly polarized light, or emits incident light from left or right circularly polarized light and linearly polarized light.

10A and 10B are conceptual diagrams for describing an optical path according to an operation mode of the display panel module illustrated in FIG. 8. The display panel module includes a liquid crystal in a normally white mode that exhibits a white color when no voltage is applied. In addition, the upper polarization member 200 includes a first polarization layer 215 and a first retardation layer 212, and the lower polarization member 210-1 includes a second polarization layer 215-1 and a second phase difference. Layer 212-1.

<In reflection mode operation>

Referring to FIG. 10A, in the reflection mode operation, when no voltage is applied to the liquid crystal, external incident light passes through the first polarizer layer 215 and then becomes linearly polarized light, and then passes through the first retardation layer 212. Left circularly polarized light. Of course, it could be right polarized light. Here, the phase difference layer 212 changes phase by λ / 4.

The circularly polarized light passes through the liquid crystal layer 430. Since the liquid crystal layer 430 maintains a horizontal arrangement because there is no voltage applied to the liquid crystal, the left circularly polarized light is caused by the liquid crystal layer 430 in such a horizontal arrangement. After the phase is changed by λ / 4 to become linearly polarized light, the linearly polarized light is reflected by the reflective electrode 417 and passes through the liquid crystal layer 430 again to change the phase by λ / 4 to become left circularly polarized light. The liquid crystal layer 430 corresponding to the reflection mode has an optical characteristic of Δnd as shown in FIG. 9.

When the left circularly polarized light passes through the first retardation layer 212, the left circularly polarized light is converted into the same linearly polarized light as the first incident light, and then light is transmitted through the first polarizer layer 215 to display a white color.

Meanwhile, when there is a voltage applied to the liquid crystal layer 430, external incident light passes through the first polarizer layer 215 and then becomes linearly polarized light, and again, left circularly polarized light passes through the first retardation layer 212. do.

The left circularly polarized light passes through the liquid crystal layer 430. In this case, since the liquid crystal layer 430 is vertically arranged by the voltage applied to the liquid crystal, the left circularly polarized light is passed through as it is. Reflected by the reflective electrode 417 becomes a right circularly polarized light, the right circularly polarized light passes through the liquid crystal layer 430 again by the first retardation layer 212, the phase is changed by λ / 4 delayed λ / 4 delayed linearly polarized light Becomes While the linearly polarized light passes through the first polarizer layer 215, the light is lost to display a black color.

<Transmission mode operation>

Referring to FIG. 10B, when there is no voltage applied to the liquid crystal layer 430 in the transmission mode operation, light provided from a backlight assembly (not shown) passes through the first polarizer layer 215-1 to linearly polarized light. The image is converted into right circularly polarized light by the second retardation layer 212-1 and applied to the liquid crystal layer 430 via the transparent electrode 150. Here, the second retardation layer 212-1 changes the phase by λ / 4.

 As shown in FIG. 9, the liquid crystal layer 430 corresponding to the transmission mode has an optical characteristic of 2 · Δnd which is twice the optical characteristic of Δnd2 of the liquid crystal layer 430 corresponding to the reflection mode.

Since the voltage is not applied to the liquid crystal layer 430 to which the right circularly polarized light is applied, it maintains a horizontal arrangement state, and is converted to left circularly polarized light by the horizontally arranged liquid crystal layer 430, and then, by the first retardation layer 212. The phase is converted into λ / 4 to become linearly polarized light. In this case, the converted linearly polarized light passes through the first polarizer layer 215 to display a white color.

On the other hand, when there is a voltage applied to the liquid crystal layer 430, the light provided from the backlight assembly is converted into linearly polarized light while passing through the second polarizer layer 215-1, and the second retardation layer 212-1 After being converted into right circularly polarized light by (), it is applied to the liquid crystal layer 430 via the pixel electrode 416.

Since the voltage is applied to the liquid crystal layer 430 to which the right circularly polarized light is applied, the liquid crystals are vertically aligned and applied to the first retardation layer 212 while maintaining the right circularly polarized light by the vertically aligned liquid crystal layer 430.

The right circularly polarized light applied to the first retardation layer 212 is converted into linearly polarized light and then applied to the first polarization difference layer 212, and the linearly polarized light applied to the first polarizer layer 215 is lost in black color. Is displayed.

Although the polarizing member applied to the reflective-transmissive display panel module has been described as an example, it is obvious that the same can be implemented in the transmissive display panel module using the polarizing member 100 shown in FIG. 1. Further, in the above, the upper polarizing member including the speaker film is taken as an example, but the speaker film may be formed on the lower polarizing member.

11 is a plan view of a display panel module according to still another embodiment of the present invention. 12 is a cross-sectional view taken along the line II-II 'shown in FIG. 11.

11 and 12, the display panel module includes an electroluminescent display panel and a polarizing member 100 disposed on the electroluminescent display panel.

The electroluminescent display panel includes a base substrate 405. A plurality of pixel portions P defined by a plurality of source lines DLm, a plurality of gate lines GLn, and a plurality of bias voltage lines VLk are disposed on the base substrate 405. .

In each pixel portion P, a first switching element TFT1, a second switching element TFT2, a storage capacitor CST, and an electroluminescent element EL are formed.

The first switching element TFT1 may include a first gate electrode 441 connected to the gate line GLn, a first source electrode 443 connected to the source line DL, the storage capacitor CST, and a second The first drain electrode 443 is commonly connected to the switching element TFT2. In addition, the first switching element TFT1 includes the first gate electrode 441 and a first channel portion 442 formed between the first source and drain electrodes 443 and 444.

The second switching element TFT2 may include a second gate electrode 451 connected to the first drain electrode 444, a second source electrode 453 connected to the bias voltage line VLk, and the electroluminescent element EL. ) And a second drain electrode 454 connected thereto. In addition, the second switching element TFT2 includes the second gate electrode 451 and a second channel portion 452 formed between the second source and drain electrodes 453 and 454. The second switching element TFT2 is a driving element for driving the electroluminescent element EL.

The storage capacitor CST includes a first electrode 461 connected to a second gate electrode 451, and a second electrode 462 connected to the bias voltage line VLk.

The electroluminescent device EL includes a pixel electrode 470 connected to the second drain electrode 454, a common electrode 490, and an electric field interposed between the pixel electrode 470 and the common electrode 490. The light emitting layer 480 is included.

A gate insulating layer 406 is formed between the first and second gate electrodes 441 and 451 and the first and second channel portions 442 and 452, and the first and second source-drain electrodes 443, Passivation layer 407 is formed over 444, 453, 454.

In the electroluminescent device EL, a pixel electrode 470 is formed on a base substrate 405 on which the gate insulating layer 406 and the passivation layer 407 are sequentially formed, and an electroluminescent layer on the pixel electrode 470. 480 is formed, and a common electrode 490 is formed on the electroluminescent layer 4800. The pixel electrode 470 is an anode of the electroluminescent device EL, and the common electrode 490 is a cathode of the electroluminescent device EL.

The electroluminescent layer 480 includes a hole injection layer, a hole transport layer, a light emitting layer, an electron injection layer, and an electron transport layer, and is formed in the emission region defined as the bank layer 408 on the pixel electrode 470. The bank layer 408 is formed of a negative photoresist layer, thereby having an obtuse taper angle.

The driving method of the pixel portion P is as follows. When a gate signal is applied from the gate line GLn, the first switching element TFT1 is turned on so that the data signal transferred from the source wiring DLm is transferred through the first switching element TFT1. The second switching element TFT2 is turned on and charged in the storage capacitor CST.

As the second switching element TFT2 is turned on, the source voltage via the first switching element TFT1 is based on the bias voltage transferred from the bias voltage line VLk. Is delivered). As a result, the EL device emits light having a predetermined brightness.

The polarizing member 100 is a transmissive polarizing member illustrated in FIG. 1.

Referring to FIG. 1, the polarizing member 100 includes a transmissive polarizing film 110, a vibration active layer 120, a speaker film 130, a protective film 140, and wiring portions 151 and 152. The transmissive polarizing film 110 divides incident light into two polarization components orthogonal to each other, transmits only one of them, and absorbs or disperses the other components. That is, only light having an optical axis parallel to the polarization axis is transmitted.

The wiring units 151 and 152 electrically connected to the speaker film 130 are connected to an output terminal of a sound source output unit (not shown) to receive a sound source signal which is an electrical signal. The speaker film 130 converts the sound source signal into mechanical vibration to emit sound waves.

The vibration active layer 120 is interposed between the transmissive polarizing film 110 and the speaker film 130 to activate the vibration of the speaker film 130 to improve sound quality and sound.

13 is a schematic block diagram of a display device according to still another embodiment of the present invention.

Referring to FIG. 13, the display device includes a timing controller 510, a voltage generator 520, a reference gamma voltage generator 530, a source driver 540, a gate driver 550, and a sound source output unit 560. And a display unit 570.

The timing controller 510 generates and outputs first to third control signals 510a, 510b, and 510c based on the control signal 501 input from an external device. The first control signal 510 controls the voltage generator 520, the second control signal 510b controls the source driver 540, and the third control signal 510c receives the gate. The driver 550 is controlled.

The control signal CONTL includes a main clock signal MCLK, a horizontal synchronization signal HSYNC, a vertical synchronization signal VSYNC, and a data enable signal DE. The first control signal 510a includes a main clock signal MCLK, the second control signal 510b includes a horizontal start signal STH and a load signal TP, and the third control signal The 510c includes a start signal STV, a scan clock signal CPV, and an output enable signal OE.

The timing controller 510 processes the first data signal 502 input from an external device according to an interface scheme and outputs the second data signal 510d to the source driver 540.

The voltage generator 520 generates driving voltages for driving the display device. In detail, a power supply voltage 520a is output to the reference gamma voltage generator 530, gate voltages 520b are output to the gate driver 550, and common voltages are output to the display unit 570. 520c). The gate voltages 520b include a gate on voltage and a gate off voltage, and the common voltages 520c include a common voltage VCOM of the liquid crystal capacitor CLC and a common voltage VST of the storage capacitor CST. It includes.

The reference gamma voltage generator 530 includes a resistor string in which a plurality of resistors corresponding to a predetermined gamma curve are connected in series, and the reference voltage is supplied to the reference voltage through the resistor string. The output is divided by gamma voltages. The reference gamma voltages 530a are provided to the source driver 540.

The source driver 540 converts the second data signal 510d into an analog third data signal using the reference gamma voltages 530a based on the second control signal 510a. The source driver 540 outputs the third data signal to the source lines DL of the display unit 570.

The gate driver 550 is a shift register and sequentially generates gate signals using the gate voltages 520b based on the third control signal 510c. The gate driver 550 sequentially outputs the gate signals sequentially generated to the gate lines GL of the display unit 570. The gate driver 550 may be integrated or mounted on the display unit 570.

The sound source output unit 560 converts the first sound source signal 503 input from an external device into a second sound source signal 560a and outputs the same to the polarizing member 100 of the display unit 570. Specifically, the second sound source signal 560a is output to both terminals of the speaker film of the polarizing member 100.

The display unit 570 includes a liquid crystal display panel 400 and a polarization member 100 disposed above or below the liquid crystal display panel 400.

In the liquid crystal display panel 400, a plurality of pixel portions P defined by a plurality of source lines DL and a plurality of gate lines GL are formed. Each pixel portion P includes a switching element TFT, a liquid crystal capacitor CLC, and a storage capacitor CST.

As illustrated in FIG. 1, the polarizing member 100 includes a polarizing film 110, a vibration active layer 120, a speaker film 130, a protective film 140, and wiring portions 151 and 152.

The polarizing film 110 includes a pressure sensitive adhesive layer (PSA) 111, a first protective layer (TAC) 112, a polarizer layer (PVA) 113, and a second protective layer (TAC) 114. do. The pressure sensitive adhesive layer 111 includes an adhesive and is formed in a film form, and is adhered by a pressure provided from the outside. The first and second protective layers 112 and 114 are formed on both surfaces of the polarizer layer 113, respectively.

The polarizer layer 113 divides incident light into two polarization components orthogonal to each other, transmits only one of them, and absorbs or disperses the other components. The vibration active layer 120 is formed on the second protective layer 114 to activate the vibration of the speaker film 130. The vibration active layer 120 includes an air layer or is formed of a material having elasticity.

The speaker film 130 may include the first metal electrode 132 formed on the piezoelectric film 131 and the first surface of the piezoelectric film 131, and the second metal electrode formed on the second surface of the piezoelectric film 131. 133. The first and second metal electrodes 132 and 133 are electrically connected to the first and second wires 151 and 152, respectively. The second sound source signal 560a is applied to the speaker film 130 through the first and second wires 151 and 152.

FIG. 14 is a detailed block diagram of the sound source output unit illustrated in FIG. 13.

1 and 14, the sound source output unit 560 includes an input unit 561, an amplifier 562, and a converter 563. The output signal of the converter 563 is input to the first and second wires 151 and 152 electrically connected to the first and second metal electrodes 132 and 133 of the speaker film 130.

The input unit 561 receives a first sound source signal 503 input from an external device. The amplifier 562 amplifies and outputs the first sound source signal 503 to a predetermined level. The transformer 563 converts the amplified first sound source signal 503 into a second sound source signal 560a and outputs the converted sound. In detail, the second sound source signal 560a is a boosted voltage for driving the speaker film 130.

The second sound source signal 560a is connected to the first and second metal electrodes of the speaker film 130 through the first and second wires 151 and 152 electrically connected to the output terminal of the converter 563. 132, 133.

As the speaker film 130 is applied with the second sound source signal 560a to the first and second metal electrodes 132 and 133, the piezoelectric film 131 vibrates to emit corresponding sound waves.

As described above, according to the present invention, a display device having a sound output function may be realized by implementing a polarizing member including a speaker film. The polarizing members may be coupled to each other between the polarizing film and the speaker film through the vibration active layer to more smoothly activate the vibration of the speaker film, thereby improving sound quality and acoustic properties. As a result, a light and small display device having a sound output function can be obtained.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

Claims (22)

A polarizing film comprising a polarizer layer for transmitting light having an axis parallel to the polarization axis among the incident lights; A speaker film disposed on the polarizing film and converting an electrical signal into vibration to emit sound waves; A vibration active layer interposed between the polarizing film and the speaker film to activate vibration of the speaker film; And And a wire part electrically connected to the speaker film to transmit the electric signal. The speaker of claim 1, wherein the speaker film comprises: first and second electrodes to which the electrical signal is input; And Hybrid type polarizing film comprising a piezoelectric film interposed between the first and second electrodes. The display device of claim 2, further comprising: a connection part electrically connected to the first electrode of the speaker film and formed at one end of the vibration active layer; And And a protective film adhered to the second electrode of the speaker film through a conductive adhesive. The electronic device of claim 3, wherein the wiring part comprises: a first wiring electrically connected to the connection part; And And a second wiring electrically connected to the conductive adhesive. The hybrid polarizing film of claim 1, wherein the vibration active layer comprises an air layer. The hybrid type polarizing film of claim 5, wherein the vibration active layer comprises a convex portion for supporting the speaker film and the polarizing film and a concave portion with the air layer formed thereon. The hybrid type polarizing film of claim 1, wherein the vibration active layer comprises a spacer and an adhesive layer of an elastic material. The hybrid polarizing film of claim 1, wherein the polarizing film further includes a retardation layer disposed under the polarizer layer to change a phase of light transmitted through the polarizer layer. Manufacturing a polarizing film fabric including a polarizer layer; Forming a vibration active layer on the polarizing film fabric; Bonding a speaker film fabric onto the vibration active layer; Cutting the first result product to which the speaker film fabric is adhered to correspond to the size of the display panel; Forming a connection part connected to the first electrode of the speaker film at one end of the vibrating active layer of the second resulted product; Bonding a transparent protective film coated with a conductive adhesive onto the second electrode of the speaker film; And Forming a first wiring and a second wiring connected to the connecting portion and the conductive adhesive, respectively, characterized in that it comprises a hybrid type polarizing film. The method of claim 9, wherein the forming of the vibration active layer Coating a synthetic resin on the polarizing film fabric; And And a step of molding the synthetic resin into an embossed embossed pattern by using a mold having an intaglio embossed pattern. The method of claim 9, wherein the forming of the vibration active layer Coating a synthetic resin on the polarizing film fabric; And And removing a portion of the synthetic resin by using a mask to form a groove. The method of claim 9, wherein the forming of the vibration active layer Coating a synthetic resin on the polarizing film fabric; And Method of producing a hybrid type polarizing film comprising the step of generating bubbles in the synthetic resin. The method of claim 9, wherein the vibrating active layer comprises an elastic adhesive layer including a spacer. The method of claim 9, wherein the connection part is formed by injecting a liquid conductor into one end of the vibrating active layer. The method of claim 9, wherein the vibration active layer is formed of a transparent material. The method of claim 9, wherein the first and second electrodes of the speaker film are each formed of a transparent conductive material. In a display device including a display panel including a switching element connected to a source wiring and a gate wiring, A source driver converting the input first data signal into an analog second data signal and outputting the converted first data signal to the source wiring line; A gate driver for outputting a gate signal to the gate wiring; A sound source output unit converting the input first sound source signal into a second sound source signal and outputting the converted sound; And And a polarizing member disposed on one surface of the display panel to transmit light parallel to the polarization axis and to output an acoustic signal in response to the second sound source signal. The method of claim 17, wherein the polarizing member A polarizing film comprising a polarizer layer for transmitting light having an axis parallel to the polarization axis among the incident lights; A speaker film disposed on the polarizing film and converting an electrical signal into vibration to emit sound waves; A vibration active layer interposed between the polarizing film and the speaker film to activate vibration of the speaker film; And And a wiring part electrically connected to the speaker film to transmit the electric signal. 19. The apparatus of claim 18, wherein the sound source output unit An input unit to which the first sound source signal is input; And And a converting unit converting the first sound source signal into a second sound source signal having a potential difference and outputting the second sound source signal to the wiring unit. The display panel of claim 17, wherein the display panel is A pixel electrode connected to the switching element; A reflection electrode formed on the pixel electrode to define a reflection part that reflects first light and a transmission part that transmits second light; And And a liquid crystal layer having a first cell gap corresponding to the first reflecting part and a second cell gap corresponding to the transmitting part. The display device of claim 20, wherein the polarizing member comprises a phase difference layer for changing a phase of light parallel to a polarization axis. The display panel of claim 17, wherein the display panel is A pixel electrode connected to a driving element driving in response to the switching element; A bank layer defining a light emitting region on the pixel electrode; An emission layer formed in the emission region; And And a counter electrode formed on the light emitting layer.

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