KR102081121B1 - Stereoscopic Image Display Device - Google Patents

Abstract

The present invention provides a display panel for displaying an image; A lens panel on the display panel, the lens panel including a silicone elastomer layer whose shape is changed by a coulombic force caused by Maxwell stress when an electric field is generated in response to a driving voltage supplied from the outside; And a lens panel driver for supplying a driving voltage to the lens panel.

Description

Stereoscopic Image Display Device

The present invention relates to a stereoscopic image display device.

With the development of information technology, the market for a display device, which is a connection medium between a user and information, is growing. Accordingly, a liquid crystal display (LCD), an organic light emitting diode display (OLED), an electrophoretic display (EPD), and a plasma display panel (PDP) The use of display devices such as) is increasing.

Some of the display devices described above are implemented as a stereoscopic image display device. The stereoscopic image display apparatus is divided into a binocular parallax technique and an autostereoscopic technique.

The binocular parallax method uses a parallax image of left and right eyes having a large stereoscopic effect. The binocular parallax method includes a glasses method and a glasses-free method, and both methods are currently used.

In the related art, an autostereoscopic method of changing an optical path using a fixed lens array such as a lenticular sheet has been proposed. However, this method has a disadvantage in that switching between 2D and 3D images is impossible. In order to improve this, research and commercialization of the auto glasses-free method capable of switching between 2D and 3D images, such as a liquid crystal filling method, a liquid crystal lens method, and a polarizing lens method, have been conducted.

However, since the liquid crystal filling method, the liquid crystal lens method, and the polarizing lens method use materials having refractive index anisotropy, when applied to a display device that does not emit a polarization source, it is necessary to apply a dual structure or add a specific structure as a single 3D optical system. There is a drawback that is not applicable, so improvement is required.

The present invention for solving the problems of the above-described background art can simplify the structure of the panel in the implementation of autostereoscopic 3D, reduce manufacturing costs, and can be applied to a display panel that emits polarized or unpolarized light. It is to provide a stereoscopic image display device.

The present invention provides a display panel for displaying an image as a means for solving the above problems; A lens panel on the display panel, the lens panel including a silicone elastomer layer whose shape is changed by a coulombic force caused by Maxwell stress when an electric field is generated in response to a driving voltage supplied from the outside; And a lens panel driver for supplying a driving voltage to the lens panel.

The lens panel may be transformed into a lenticular lens shape when an electric field is generated.

The lens panel may include a resin layer located above or below the silicone elastomer layer.

The silicone elastomer layer and the resin layer may have different refractive indices.

The refractive index of the silicone elastomer layer may be larger than the refractive index of the resin layer.

The silicone elastomer layer and the resin layer may have different thicknesses.

The lens panel includes a lower substrate, an upper substrate facing away from the lower substrate, a lower electrode formed on the lower substrate, an upper electrode formed on the upper substrate and facing the lower electrode, and a silicone elastomer layer formed on the lower electrode. It may include.

One of the lower electrode and the upper electrode may be formed in the form of the front electrode corresponding to the size of the substrate, and the other may be formed in the form of the split electrode.

The lens panel may include a lower substrate, an upper substrate spaced apart from the lower substrate, a lower electrode formed on the lower substrate, and a silicone elastomer layer formed on the lower electrode.

The lower electrode may be formed in the form of a split electrode.

The present invention can simplify the structure of the panel when implementing autostereoscopic 3D, and it is possible to implement a universal stereoscopic image display device that can be applied to a display panel that emits polarized or unpolarized light. In addition, the present invention has an effect of providing a three-dimensional image display device that can reduce the manufacturing cost because it uses a silicone elastic resin that can replace the expensive liquid crystal when implementing the glasses-free 3D.

1 is a block diagram schematically showing a stereoscopic image display device according to a first embodiment of the present invention;
2 is a view for explaining a driving concept of the stereoscopic image display device of FIG.
3 is a cross-sectional view of the lens panel according to the first embodiment of the present invention.
4 is a cross-sectional view illustrating the characteristics of a lens panel according to a driving voltage.
5 is an exemplary cross-sectional view for explaining characteristics according to materials of a substrate constituting the lens panel.
6 is an exemplary cross-sectional view of a lens panel according to a modified example of the first embodiment of the present invention.
7 is a cross-sectional view of the lens panel according to the second embodiment of the present invention.
8 is a cross-sectional view illustrating the characteristics of a lens panel according to a driving voltage.
9 is an exemplary cross-sectional view of a lens panel according to a modified example of the second embodiment of the present invention.
10 is an exemplary cross-sectional view of a lens panel according to a third embodiment of the present invention.
11 is a cross-sectional view illustrating the characteristics of a lens panel according to a driving voltage.
12 and 13 illustrate cross-sectional views of a lens panel according to a modified example of the third exemplary embodiment of the present invention.
14 is a schematic cross-sectional view of a three-dimensional image display device using an OLED.
15 is a schematic cross-sectional view of a stereoscopic image display apparatus using an LCD.
16 is a schematic cross-sectional view of a stereoscopic image display apparatus using a PDP.

Hereinafter, with reference to the accompanying drawings, the specific content for the practice of the present invention will be described.

<First Embodiment>

FIG. 1 is a block diagram schematically illustrating a stereoscopic image display device according to a first embodiment of the present invention, and FIG. 2 is a view for explaining a driving concept of the stereoscopic image display device of FIG. 1.

As shown in FIG. 1, the stereoscopic image display apparatus according to the first embodiment of the present invention includes an image supply unit SBD, a timing controller TCN, a display panel driver DRV1, a lens panel driver DRV2, and a display panel. PNL1 and lens panel PNL2 are included. The stereoscopic image display apparatus according to the first embodiment of the present invention is implemented in an auto glasses-free method.

The image supply unit SBD supports a two-dimensional mode (hereinafter referred to as 2D mode) or a three-dimensional mode (hereinafter referred to as 3D mode). The image supply unit SBD generates 2D image frame data in 2D mode and 3D image frame data in 3D mode. The 3D image frame data usually includes left eye image frame data and right eye image frame data.

The image supply unit SBD supplies timing signals such as a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, a main clock, and the like to the timing controller TCN. The image supply unit SBD is selected in 2D or 3D mode according to a user selection input through the user interface, generates image frame data corresponding thereto, and supplies the same to the timing controller TCN. The user interface includes user input means such as an on screen display (OSD), a remote controller, a keyboard, and a mouse.

The timing controller TCN receives 2D image frame data or 3D image frame data from the image supply unit SBD. When the 2D mode is selected by the user input means, the timing controller TCN supplies 2D image frame data to the display panel driver DRV1 at a frame frequency such as 50 Hz to 60 Hz. When the 3D mode is selected by the user input means, the timing controller TCN alternately supplies the left eye image frame data and the right eye image frame data to the display panel driver DRV1 at a frame frequency of 120 Hz or more. In addition, the timing controller TCN supplies various control signals corresponding to the image frame data to the display panel driver DRV1.

The display panel driver DRV1 includes a data driver connected to data lines of the display panel PNL1 to supply a data signal, and a scan driver connected to scan lines of the display panel PNL1 to supply a scan signal. . The data driver included in the display panel driver DRV1 converts the digital frame data into analog frame data under the control of the timing controller TCN and supplies the same to the data lines of the display panel PNL1. In addition, the scan driver included in the first driver DRV sequentially supplies the scan signals to the scan lines of the display panel PNL1 under the control of the timing controller TCN.

The display panel PNL1 receives a scan signal and a data signal from the display panel driver DRV1 and displays a 2D image or a 3D image correspondingly. The display panel PNL1 has a configuration formed on the first substrate and a configuration formed on the second substrate for each characteristic of the device configured therein. However, the present invention can be applied to both the display panel PNL1 for emitting light polarized by attaching a polarizing plate and to the display panel PNL1 for emitting light unpolarized by attaching a polarizing plate, and specific examples thereof will be described below. Deal with.

The lens panel driver DRV2 supplies the driving voltages VL and VU to the lens panel PNL2. The lens panel driver DRV2 supplies driving voltages VL and VU generated externally or internally to the lower electrode and the upper electrode of the lens panel PNL2 under the control of the timing controller TCN. The driving voltages VL and VU supplied to the lower electrode and the upper electrode may be synchronized with or asynchronous to at least one of the signals output from the display panel driver DRV1. The lens panel driver DRV2 outputs the driving voltages VL and VU under the control of the timing controller TCN.

The lens panel PNL2 receives the driving voltages VL and VU from the lens panel driver DRV2 and operates to display a 2D image or a 3D image correspondingly. In the 2D image mode, the lens panel PNL2 has a planar shape such that an image emitted from the display panel PNL1 is emitted as it is. In the 3D image mode, the lens panel PNL2 is deformed into a plurality of lenticular lens shapes so that the left eye image and the right eye image emitted from the display panel PNL1 are separated from each other.

The lens panel PNL2 realizes a lenticular lens shape by using an electrostriction effect in which a coulomb charge attraction occurs due to Maxwell stress when an electric field is generated in the internal electrode. do. Hereinafter, a description will be given based on the unit lens shape.

As shown in FIG. 2A, when the driving voltages VL and VU are not supplied, a lens shape is not formed in the lens panel PNL2. When the driving voltages VL and VU are not supplied, the lens shape is not formed in the lens panel PNL2. Therefore, the light emitted from the display panel PNL1 passes through the lens panel PNL2. do. That is, if no lens shape is formed in the lens panel PNL2, the 2D image is displayed.

As shown in FIG. 2B, when driving voltages VL and VU are supplied, a lens shape is formed in the lens panel PNL2. When the driving voltages VL and VU are supplied, a lens shape is formed in the lens panel PNL2, and thus the light emitted from the display panel PNL1 passes through the lens panel PNL2 and then moves to the left side as shown in “LR, LL”. It is refracted to the right and exits. That is, when a lens shape is formed in the lens panel PNL2, a 3D image is displayed.

Hereinafter, a description will be given of the present invention with reference to the cross-sectional view of the lens panel.

3 is a cross-sectional view illustrating the lens panel according to the first embodiment of the present invention, FIG. 4 is a cross-sectional view illustrating the characteristics of the lens panel according to the driving voltage, and FIG. 5 is a cross-sectional view of the substrate constituting the lens panel. 6 is a cross-sectional view illustrating a characteristic according to a material, and FIG. 6 is a cross-sectional view illustrating a lens panel according to a modified example of the first embodiment of the present invention.

As shown in FIG. 3, the lens panel PNL2 includes a lower substrate 110, an upper substrate 120, a lower electrode 130, an upper electrode 140, and a silicone elastomer layer 150.

The lower substrate 110 and the upper substrate 120 may be formed of a film such as transparent glass or polyester sulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), and polycarbonate (PC). Is selected.

The silicone elastomer layer 150 may include, for example, a P polymer (P (VDF-TrEE-CFE)), polydimethylsiloxane (PDMS), and a silicone resin. However, the silicone elastomer layer 150 is not limited thereto.

The lower electrode 130 is formed on the lower substrate 110. The lower electrode 130 is formed in the form of a front electrode to occupy the entire front surface of the lower substrate 110. The upper electrode 140 is formed on the upper substrate 120. The upper electrode 140 is formed in the form of a split electrode (or stripe) divided inside the upper substrate 120. The lower electrode 130 and the upper electrode 140 form a vertical electric field corresponding to the driving voltage.

When the electric field is generated by the driving voltage supplied to the lower electrode 130 and the upper electrode 140, the lens panel PNL2 deforms the silicone elastomer layer 150 into a lens shape.

As shown in FIG. 4A, when the driving voltages VL and VU are not supplied, the silicone elastomer layer 150 included in the lens panel PNL2 is maintained without being deformed.

As shown in FIG. 4B, when the driving voltages VL and VU are supplied, the silicone elastomer layer 150 included in the lens panel PNL2 is deformed into a lens shape.

The lens panel PNL2 forms a lens shape based on an electrostriction effect (reverse piezo-electric effect). Looking at the inside of an object, there are domains with different polarizations of different directions and sizes, which are different from each other. When an electric field is applied to the object, the domains move in order to orient the electric field. It is called electric strain effect.

When the electric field is generated by the driving voltage supplied through the lower electrode 130 and the upper electrode 140, the silicone elastomer layer 150 is deformed into a lens shape by receiving a coulombic force caused by Maxwell stress due to the electric deformation effect. At this time, the position and shape of the lower electrode 130 and the upper electrode 140 (including the distance between the electrodes) and the driving voltage supplied to the lower electrode 130 and the upper electrode 140 are determined by the shape and pitch of the lens optimized for the size and viewing distance of the subpixel of the display panel, It is designed to form a focal length and the like.

The lower driving voltage VL supplied to the lower electrode 130 and the upper driving voltage VU supplied to the upper electrode 140 have a predetermined voltage difference to form an electric field. The first to seventh upper driving voltages VU1 to VU7 supplied to the upper electrode 140 may have one or more different voltage levels to adjust the shape, pitch, and focal length of the lens.

On the other hand, when the lower substrate 110 is selected as a rigid material such as glass and the upper substrate 120 is composed of a flexible material such as a film, the force due to the physical deformation of the silicone elastomer layer 150 is the upper substrate 120 Can also be delivered. In this case, as shown in FIG. 5, the upper substrate 120 positioned in the center region of the silicone elastomer layer 150 rises in the y2 direction and the upper substrate 120 positioned in the outer region of the silicone elastomer layer 150 is It descends in the y1 direction. That is, since the upper substrate 120 is also deformed to have a lens shape along the silicone elastomer layer 150, the refractive index of the transmitted light may be varied based on this structure.

As illustrated in FIG. 6, the lower electrode 130 may be formed in a split electrode form to form a lens shape, a pitch, a focal length, and the like optimized for the size and viewing distance of a subpixel of a display panel. In this case, the lower electrode 130 and the upper electrode 140 may be formed to face each other from above and below or alternately so that the upper electrodes are positioned between the lower electrodes.

Second Embodiment

7 is a cross-sectional view illustrating a lens panel according to a second embodiment of the present invention, FIG. 8 is a cross-sectional view illustrating the characteristics of a lens panel according to a driving voltage, and FIG. 9 is a cross-sectional view illustrating a second embodiment of the present invention. It is a cross-sectional view of the lens panel according to the modified example.

As shown in FIG. 7, the lens panel PNL2 includes a lower substrate 110, an upper substrate 120, a lower electrode 130, an upper electrode 140, a silicone elastomer layer 150, and a resin layer 160. ).

The lower substrate 110 and the upper substrate 120 may be formed of a film such as transparent glass or polyester sulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), and polycarbonate (PC). Is selected.

The silicone elastomer layer 150 may be made of P polymer [P (VDF-TrEE-CFE)], polydimethylsiloxane (PDMS), and silicone resin, and the resin layer 160 may be made of similar or the same material. Can be done. The refractive index n1 of the silicone elastomer layer 150 and the refractive index n2 of the resin layer 160 may be different from each other. For example, the refractive index n1 of the silicone elastomer layer 150 is set to be larger than the refractive index n2 of the resin layer 160, or the refractive index n2 of the resin layer 160 is the refractive index of the silicone elastomer layer 150 ( n1) can be set larger than.

In addition, the silicone elastomer layer 150 and the resin layer 160 may be formed to have different thicknesses. For example, the thickness of the silicone elastomer layer 150 may be set higher than the thickness of the resin layer 160 or the thickness of the resin layer 160 may be set larger than the thickness of the silicone elastomer layer 150. The resin layer 160 serves to assist physical deformation so that the silicone elastomer layer 150 has a lens shape. Therefore, the thickness of the resin layer 160 is so thin that it is thinner than the thickness of the silicone elastomer layer 150.

The lower electrode 130 is formed on the lower substrate 110. The lower electrode 130 is formed in the form of a front electrode to occupy the entire front surface of the lower substrate 110. The upper electrode 140 is formed on the upper substrate 120. The upper electrode 140 is formed in the form of a split electrode divided inside the upper substrate 120. The lower electrode 130 and the upper electrode 140 form a vertical electric field corresponding to the driving voltage.

When the electric field is generated by the driving voltage supplied to the lower electrode 130 and the upper electrode 140, the lens panel PNL2 deforms the silicone elastomer layer 150 into a lens shape.

As shown in FIG. 8A, when the driving voltages VL and VU are not supplied, the silicone elastomer layer 150 and the resin layer 160 included in the lens panel PNL2 are not deformed and are intact. Maintain a planar shape.

As shown in FIG. 8B, when the driving voltages VL and VU are supplied, the silicone elastomer layer 150 included in the lens panel PNL2 is deformed into a lens shape, and the resin layer 160 is It is deformed into a shape opposite to the lens shape.

The lens panel PNL2 forms a lens shape based on an electrostriction effect (reverse piezo-electric effect). Looking at the inside of an object, there are domains with different polarizations of different directions and sizes, which are different from each other. When an electric field is applied to the object, the domains move in order to orient the electric field. It is called electric strain effect.

When the electric field is generated by the driving voltage supplied through the lower electrode 130 and the upper electrode 140, the silicone elastomer layer 150 and the resin layer 160 are coulombs caused by Maxwell stress due to the electric deformation effect. It is transformed into a lens shape by receiving a force (Coulomb Charge Attraction). At this time, the position and shape of the lower electrode 130 and the upper electrode 140 (including the distance between the electrodes) and the driving voltage supplied to the lower electrode 130 and the upper electrode 140 are determined by the shape and pitch of the lens optimized for the size and viewing distance of the subpixel of the display panel, It is designed to form a focal length and the like.

The lower driving voltage VL supplied to the lower electrode 130 and the upper driving voltage VU supplied to the upper electrode 140 have a predetermined voltage difference to form an electric field. The first to seventh upper driving voltages VU1 to VU7 supplied to the upper electrode 140 may have one or more different voltage levels to adjust the shape, pitch, and focal length of the lens. Due to the level difference between the first to seventh upper driving voltages VU1 to VU7, the center region of the silicone elastomer layer 150 rises in the y2 direction and the outer region of the silicone elastomer layer 150 descends in the y1 direction. do.

As illustrated in FIG. 9, the lower electrode 130 may be formed in the form of a split electrode to form a lens shape, a pitch, a focal length, and the like optimized for the size and viewing distance of a subpixel of a display panel. In this case, the lower electrode 130 and the upper electrode 140 may be formed to face each other from above and below or alternately so that the upper electrodes are positioned between the lower electrodes.

Third Embodiment

10 is a cross-sectional view illustrating a lens panel according to a third embodiment of the present invention, FIG. 11 is a cross-sectional view illustrating characteristics of a lens panel according to a driving voltage, and FIG. 12 and FIG. Illustrated cross-sectional views of the lens panel according to a modified example of the third embodiment.

As shown in FIG. 10, the lens panel PNL2 includes a lower substrate 110, an upper substrate 120, a lower electrode 130, and a silicone elastomer layer 150.

The lower substrate 110 and the upper substrate 120 may be formed of a film such as transparent glass or polyester sulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), and polycarbonate (PC). Is selected.

The silicone elastomer layer 150 may include, for example, a P polymer (P (VDF-TrEE-CFE)), polydimethylsiloxane (PDMS), and a silicone resin. However, the silicone elastomer layer 150 is not limited thereto.

The lower electrode 130 is formed on the lower substrate 110. The lower electrode 130 is formed in the form of a split electrode divided inside the lower substrate 110. The lower electrode 130 forms a horizontal electric field in response to the driving voltage.

When the driving voltage is not supplied to the lens panel PNL2, the silicone elastomer layer 150 included in the lens panel PNL2 is not deformed and maintains a flat shape without being deformed. However, when the driving voltage is supplied to the lens panel PNL2, the silicone elastomer layer 150 included in the lens panel PNL2 is deformed into a lens shape.

As shown in FIG. 11, when the driving voltages VN1 to VN7 are supplied, the silicone elastomer layer 150 included in the lens panel PNL2 is deformed into a lens shape.

The lens panel PNL2 forms a lens shape based on an electrostriction effect (reverse piezo-electric effect). Looking at the inside of an object, there are domains with different polarizations of different directions and sizes, which are different from each other. When an electric field is applied to the object, the domains move in order to orient the electric field. It is called electric strain effect.

When the electric field is generated by the driving voltage (VN1 ~ VN7) supplied through the lower electrode 130, the silicone elastomer layer 150 is subjected to the Coulomb Charge Attraction due to Maxwell Stress due to the electric deformation effect. It is transformed into a lens shape by receiving. In this case, the distance between the lower electrodes 130 and the driving voltages VN1 to VN7 supplied to the lower electrodes 130 form the shape, pitch, and focal length of the lens optimized for the size and viewing distance of the subpixels of the display panel. It is designed to.

The lower driving voltages VN1 to VN7 supplied to the lower electrode 130 have one or more different polarities to form an electric field. For example, a positive voltage is supplied to the center region of the silicone elastomer layer 150 such as VP3, VP4 and VP5, and a negative voltage such as VN1, VN2, VN6 and VN7 is supplied to the outer region of the silicone elastomer layer 150. Is supplied.

The lower driving voltages VN1 to VN7 supplied to the lower electrode 130 may have one or more different voltage levels in order to adjust the shape, pitch, and focal length of the lens. Due to the level difference between the first to seventh lower driving voltages VN1 to VN7, the central region of the silicone elastomer layer 150 rises in the y2 direction and the outer region of the silicone elastomer layer 150 descends in the y1 direction. do.

As illustrated in FIG. 12, the lens panel PNL2 may include a lower substrate 110, an upper substrate 120, a lower electrode 130, a silicone elastomer layer 150, and a resin layer 160. The resin layer 160 may be made of the same or the same material as the silicone elastomer layer 150.

The refractive index n1 of the silicone elastomer layer 150 and the refractive index n2 of the resin layer 160 may be different from each other. For example, the refractive index n1 of the silicone elastomer layer 150 is set to be larger than the refractive index n2 of the resin layer 160, or the refractive index n2 of the resin layer 160 is the refractive index of the silicone elastomer layer 150 ( n1) can be set larger than.

In addition, the silicone elastomer layer 150 and the resin layer 160 may be formed to have different thicknesses. For example, the thickness of the silicone elastomer layer 150 may be set higher than the thickness of the resin layer 160 or the thickness of the resin layer 160 may be set larger than the thickness of the silicone elastomer layer 150. The resin layer 160 serves to assist physical deformation so that the silicone elastomer layer 150 has a lens shape. Therefore, the thickness of the resin layer 160 is so thin that it is thinner than the thickness of the silicone elastomer layer 150.

As shown in FIG. 13, the lens panel PNL2 may be formed of a lower substrate 110, an upper substrate 120, a lower electrode 130, an upper electrode 140, and a silicone elastomer layer. The lower driving voltage supplied to the lower electrode 130 has one or more different polarities to form an electric field. The upper driving voltage supplied to the upper electrode 140 is supplied with a voltage opposite to the reference voltage or the lower driving voltage.

Hereinafter, a stereoscopic image display apparatus to which a lens panel according to an exemplary embodiment of the present invention can be applied will be described.

14 is a schematic cross-sectional view of a stereoscopic image display device using an OLED, FIG. 15 is a schematic cross-sectional view of a stereoscopic image display device using an LCD, and FIG. 16 is a schematic cross-sectional view of a stereoscopic image display device using a PDP. This is an illustration.

As shown in FIG. 14, the lens panel PNL2 is formed on the display surface of the OLED display panel PNL1 that emits unpolarized light. The OLED display panel PNL1 includes a first substrate 210, a second substrate 220, a thin film transistor array 230, and an organic light emitting diode 240.

The thin film transistor array 230 is formed on the first substrate 210. The thin film transistor array 230 includes data lines, scan lines, switching transistors, driving transistors, and capacitors. Since the thin film transistor array 230 is formed in various forms according to the structure of the transistor, the thin film transistor array 230 is simplified and illustrated as a block.

The organic light emitting diode 240 is formed on the thin film transistor array 230. The organic light emitting diode 240 includes a first electrode, a light emitting layer, and a second electrode. The first electrode and the second electrode are selected as an anode electrode and a cathode electrode, or a cathode electrode and an anode electrode. The first electrode is connected to the source electrode or the drain electrode of the driving transistor of the thin film transistor array 230. The second electrode is connected to a high potential voltage (eg VDD) or a low potential voltage (eg VSS). The light emitting layer is formed between the first electrode and the second electrode. The light emitting layer emits red, green, and blue light, respectively. Accordingly, the light emitting layer included in the red subpixel R emits red, the light emitting layer included in the green subpixel G emits green, and the light emitting layer included in the blue subpixel B emits blue. .

Meanwhile, the OLED display panel PNL1 may include a red subpixel emitting red, a white subpixel emitting white, a green subpixel emitting green, and a blue subpixel emitting blue. In this case, all of the light emitting layers included in the red subpixel, the green subpixel, and the blue subpixel emit white light. The red, green, and blue subpixels further include red, green, and blue color filters that convert white to red, green, and blue, respectively. However, in the case of the white subpixel, since a separate color filter for color conversion is unnecessary, the emitted white light is emitted as it is. That is, the color filter does not exist in the region corresponding to the white subpixel.

In general, a circular polarizing plate may be attached to the display surface of the OLED display panel PNL1, but the lens panel PNL2 may be applied to a display panel that emits unpolarized light, and thus, the OLED display panel PNL1 and the lens panel PNL2. The circularly polarizing plate normally attached therebetween may be removed.

As shown in FIG. 15, the lens panel PNL2 is formed on the display surface of the LCD display panel PNL1 that emits polarized light. The LCD display panel PNL1 includes a first substrate 210, a second substrate 220, a thin film transistor array 230, a color filter 250, lower and upper polarizers LPOL and UPOL, a liquid crystal layer 260, and The backlight unit 270 is included.

The thin film transistor array 230 is formed on the first substrate 210. The thin film transistor array 230 includes data lines, scan lines, a switching transistor, and a capacitor. Since the thin film transistor array 230 is formed in various forms according to the structure of the transistor, the thin film transistor array 230 is simplified and illustrated as a block.

The color filter 250 is formed on the second substrate 220 (the inner surface of the second substrate). The color filter 250 is formed of a resin including red, green, and blue pigments with a black matrix BM therebetween. Although not shown, an overcoat layer may be further formed on the color filter 250. The liquid crystal layer 260 is formed between the first substrate 210 and the second substrate 220. The lower polarizer LPOL is formed on the rear surface of the first substrate 210, and the upper polarizers LPOL and UPOL are formed on the display surface of the second substrate 220.

The backlight unit 270 is positioned on the rear surface of the first substrate 210. The backlight unit 270 provides light through the rear surface of the first substrate 210. The backlight unit 270 is an edge type light source is located on one side of the first substrate 210, a dual type light source is located on one side and the other side of the first substrate 210, the light source is a lower portion of the first substrate 210 It is selected as one of the direct types located at. The light source of the backlight unit 270 is selected from a light emitting diode (LED) or a cold cathode fluorescent lamp (CCFL).

As shown in FIG. 16, the lens panel PNL2 is formed on the display surface of the PDP display panel PNL1 that emits unpolarized light. The PDP display panel PNL1 includes a first substrate 210, a second substrate 220, an address electrode 280, a discharge layer 285, a sustain electrode 290, and a scan electrode 295.

The address electrode 280 is formed on the first substrate 210. The address electrode 280 is insulated by the lower dielectric layer. The sustain electrode 290 and the scan electrode 295 are separated from each other on the second substrate 220. The sustain electrode 290 and the scan electrode 295 are insulated by the upper dielectric layer. The address electrode 280, the sustain electrode 290, and the scan electrode 295 are arranged to cross at right angles to each other.

The discharge layer 285 is formed between the address electrode 280, the sustain electrode 290, and the scan electrode 295. The discharge layer 285 is partitioned by the partition wall PW, and is divided into a red discharge layer R, a green discharge layer G, and a blue discharge layer B by a phosphor layer formed therein. The partition wall PW is formed of one of a stripe type, a well type, a delta type, and a honeycomb type to partition a discharge cell, and includes discharge gas therein.

As described above, the stereoscopic image display device according to an embodiment of the present invention is applicable to an OLED display panel and a PDP display panel for emitting unpolarized light or an LCD display panel for emitting polarized light, as well as other displays. It can also be applied to panels. Meanwhile, the lens panel PNL2 described above may use a second substrate of the display panel PNL1 disposed below to form a thin film.

As described above, the present invention can simplify the structure of the panel when implementing autostereoscopic 3D, and it is possible to implement a general-purpose stereoscopic image display device that can be applied to a display panel that emits polarized or unpolarized light. In addition, the present invention has an effect of providing a three-dimensional image display device that can reduce the manufacturing cost because it uses a silicone elastic resin that can replace the expensive liquid crystal when implementing the glasses-free 3D.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention by those skilled in the art to which the present invention pertains. It will be appreciated that it may be practiced. Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in every respect. In addition, the scope of the present invention is represented by the following claims rather than the detailed description. In addition, all changes or modifications derived from the meaning and scope of the claims and equivalent concepts shall be construed as being included in the scope of the present invention.

SBD: Video Supply TCN: Timing Control
DRV1: display panel driver DRV2: lens panel driver
PNL1: Display panel PNL2: Lens panel
110: lower substrate 120: upper substrate
130: lower electrode 140: upper electrode
150: silicone elastomer layer 160: resin layer

Claims (11)

A display panel displaying an image;
A lens panel on the display panel, the lens panel including a silicone elastomer layer whose shape is changed by a coulombic force caused by Maxwell stress when an electric field is generated in response to a driving voltage supplied from the outside; And
It includes a lens panel driving unit for driving the lens panel,
The lens panel
The lower substrate,
An upper substrate facing the lower substrate and spaced apart from each other;
A split electrode positioned on at least one surface of the lower substrate and the upper substrate, the split electrodes being divided into a plurality of parts at a predetermined interval on the surface;
The silicone elastomer layer is changed in shape by the voltage applied to the split electrode,
And the lens panel driver is configured to apply a driving voltage having one or more different voltage levels to the split electrodes. The method of claim 1,
The lens panel
And generating a lenticular lens shape when the electric field is generated. The method of claim 1,
The lens panel
And a resin layer disposed above or below the silicone elastomer layer. The method of claim 3,
The silicone elastomer layer and the resin layer
A three-dimensional image display device, characterized in that the refractive index is different. The method of claim 4, wherein
The refractive index of the silicone elastomer layer is
And a refractive index greater than that of the resin layer. The method of claim 3,
The silicone elastomer layer and the resin layer
Stereoscopic display device characterized in that the thickness is different. The method of claim 1,
The lens panel
A lower electrode formed on the lower substrate;
And an upper electrode formed on the upper substrate and facing the lower electrode. The method of claim 7, wherein
And one of the lower electrode and the upper electrode is formed in the form of a front electrode corresponding to the size of the substrate, and the other is formed in the form of the divided electrode. The method of claim 1,
The lens panel
And a lower electrode formed on the lower substrate. The method of claim 9,
The lower electrode is
And a stereoscopic image display device in the form of the split electrode. A display panel displaying an image;
The substrate is disposed on the display panel, and is disposed on at least one of the lower substrate, the upper substrate facing the lower substrate, and at least one of the lower substrate and the upper substrate. A lens panel including the divided electrode and the silicone elastomer layer whose shape is changed by a voltage applied to the divided electrode; And
It includes a lens panel driving unit for driving the lens panel,
And the lens panel driver is configured to apply a driving voltage having one or more different voltage levels to the split electrodes to separate the left eye image and the right eye image of the display panel.

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