KR20110113872A - Stereoscopic image display device - Google Patents

Abstract

The present invention relates to a stereoscopic image display device including a touch screen. A stereoscopic image display device of the present invention includes a display panel including a pixel array; A touch screen formed on the display panel; And a lens / barrier cell disposed between the display panel and the touch screen, wherein the touch screen and the lens / barrier cell share a first shared substrate.

Description

Stereoscopic Display Device {STEREOSCOPIC IMAGE DISPLAY DEVICE}

The present invention relates to a stereoscopic image display device including a touch screen.

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 the left and right eyes with a large stereoscopic effect, and there are glasses and no glasses, both of which are put to practical use.

The spectacle method displays the polarization of the left and right parallax image on a direct-view display device or a projector or a time division method, and realizes a stereoscopic image using polarized glasses or liquid crystal shutter glasses. The glasses-free method generally includes a parallax barrier method and a lenticular method.

In recent years, as the use of a stereoscopic image display device is gradually increased, a stereoscopic image display device including a touch screen is required. Since a three-dimensional image display device including a touch screen increases the number of substrates by combining a touch screen and a three-dimensional image display device, there is a problem in that cost increases and thickness is difficult.

When the touch screen is coupled to the stereoscopic image display device, there is a problem in that electrical coupling occurs between the common electrode of the stereoscopic image display device and the touch sensors of the touch screen. Electrical coupling is influenced by the parasitic capacitance C existing between the common electrode of the stereoscopic image display and the touch sensors of the touch screen. Parasitic capacitance (C) is the same as Equation 1.

은 유전상수, s는 전극의 면적, d는 전극 간 거리를 의미한다. 기생용량(C)은 전극 간 거리(d)에 반비례하므로, 전극 간 거리(d)가 가까울수록 기생용량(C)은 커진다. In Equation 1, C is parasitic capacity,

Is the dielectric constant, s is the electrode area, and d is the distance between the electrodes. Since the parasitic capacitance C is inversely proportional to the inter-electrode distance d, the closer the inter-electrode distance d is, the larger the parasitic capacitance C becomes.

The larger the parasitic capacitance C, the greater the electrical coupling between the touch sensor and the common electrode. Due to the electrical coupling, there is a problem that the display image of the portion touched by the user is distorted. As a result, the 3D image display device including the touch screen needs to be designed to minimize the electrical coupling in consideration of the distance between the common electrode and the touch sensor.

The present invention provides a stereoscopic image display device which can be thinned and minimizes electrical coupling with a touch screen.

A stereoscopic image display device of the present invention includes a display panel including a pixel array; A touch screen formed on the display panel; And a lens / barrier cell disposed between the display panel and the touch screen, wherein the touch screen and the lens / barrier cell share a first shared substrate.

The present invention is a three-dimensional image display device including a touch screen, the lens / barrier cell and the touch screen share a single substrate, using a transparent double-sided adhesive film to bond the lens / barrier cell and the display panel. As a result, the present invention can reduce the number of substrates, reduce the cost, and it is possible to thin the display device. In addition, the present invention can eliminate the air layer existing between the lens / barrier cell and the touch screen, thereby improving visibility.

In the present invention, a lens / barrier cell is disposed between the touch screen and the display panel. As a result, the present invention can minimize the electrical coupling between the display panel and the touch screen.

1 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a first embodiment of the present invention.
2 is a view showing a switchable barrier cell for implementing a 2D image.
3 is a view illustrating a switchable barrier cell for implementing a 3D image.
4 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a second embodiment of the present invention.
5 is a view showing a switchable lens cell for implementing a two-dimensional image.
6 is a view illustrating a switchable lens cell for implementing a 3D image.
7 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen according to a third embodiment of the present invention.
8 is a diagram illustrating a lenticular lens cell implementing a 3D image.
9 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a fourth embodiment of the present invention.
10 is a view showing a barrier film for implementing a three-dimensional image.
11 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen according to a fifth embodiment of the present invention.
12 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a sixth embodiment of the present invention.
13 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen according to a seventh embodiment of the present invention.
14 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to an eighth embodiment of the present invention.
15 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a ninth embodiment of the present invention.
16 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a tenth embodiment of the present invention.
17 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to an eleventh embodiment of the present invention.
18 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen according to a twelfth embodiment of the present invention.
19 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a thirteenth embodiment of the present invention.
20 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen according to a fourteenth embodiment of the present invention.
21 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a fifteenth embodiment of the present invention.
22 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a sixteenth embodiment of the present invention.
FIG. 23 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen according to a seventeenth exemplary embodiment of the present invention.
24 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen according to an eighteenth embodiment of the present invention.
25 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a nineteenth embodiment of the present invention.
26 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a twentieth embodiment of the present invention.
27 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen according to a twenty-first embodiment of the present invention.
28 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a twenty-second embodiment of the present invention.
29 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a twenty-third embodiment of the present invention.
30 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen according to a twenty-fourth embodiment of the present invention.
FIG. 31 is a block diagram illustrating a 3D image display device including a touch screen implemented with the switchable barrier cell of FIG. 1.
FIG. 32 is a block diagram illustrating a stereoscopic image display device including a touch screen implemented with the lenticular lens cell of FIG. 7.
33 is a cross-sectional view illustrating a stereoscopic image display device in which a touch screen, a lens / barrier cell, and a display panel are bonded by a sealant.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like numbers refer to like elements throughout. In the following description, when it is determined that a detailed description of known functions or configurations related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The names of the components used in the following description are selected in consideration of the ease of preparation of the specification, and may be different from the names of the actual products.

The display panel 10 of the stereoscopic image display device of the present invention is a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an organic light emitting display The display device may be implemented as a flat panel display device such as an organic light emitting diode (OLED) and an electrophoresis display device (EPD). Although the present invention has been exemplified by the OLED display panel in the following embodiments, it should be noted that the present invention is not limited to the OLED display panel.

The lens / barrier cell of the present invention for implementing a 3D image may be implemented by a switchable barrier cell 30, a switchable lens cell 40, a lenticular lens cell 50, a barrier film 60, or the like. . Detailed description thereof will be described later with reference to the accompanying drawings.

In the present invention, as the bonding member between the display panel 10 and the lens / barrier cell, an ultraviolet / heat curable sealant 71 or a transparent double-sided adhesive film 72 may be used. Detailed description thereof will be described later.

The touch screen 20 of the present invention may be implemented by any known touch screen device. The touch screen 20 is classified into a resistance method, a capacitance method, a pressure method, an infrared method, a surface ultrasonic method, and the like according to an operation principle.

In the present invention, the touch screen 20 and the lens / barrier cell share a single substrate. Hereinafter, the substrate shared by the touch screen 20 and the lens / barrier cell will be referred to as a “first shared substrate”. In addition, in the present invention, the display panel 10 and the lens / barrier cell may share a single substrate. Hereinafter, the substrate shared by the display panel 10 and the lens / barrier cell will be referred to as a “second shared substrate”.

1, 4, 7, and 9, the touch sensors 21 are formed between the first shared substrate and the touch screen transparent substrate. 1, 4, 7, and 9, the display panel 10 and the lens / barrier cell are bonded by the sealant 71. 1, 4, and 7 include first to fifth transparent substrates 101, 102, 103, 104, and 105, and the embodiment of FIG. 9 includes first to third transparent substrates 101. , 102, 113).

1 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a first embodiment of the present invention. Referring to FIG. 1, the present invention includes a display panel 10, a touch screen 20, and a switchable barrier cell 30.

The display panel 10 includes first and second transparent substrates 101 and 102 facing each other. The pixel array 11 includes a plurality of pixels for displaying an image between the first and second transparent substrates 101 and 102. A plurality of pixels are formed in the pixel array 11 in the form of an active matrix. Each of the pixels includes R, G, and B pixels. The pixel array 11 has data lines for supplying data voltages to a plurality of pixels, and scan lines for supplying scan pulses to a plurality of pixels. Each of the pixels receives an analog data signal from the data line when the gate signal is supplied to the gate line, and generates light corresponding to the data signal.

In order to display a 3D image, each pixel is divided into an RGB pixel RGB _R of a right eye image displaying a right eye image and an RGB pixel RGB _L of a left eye image displaying a left eye image. The switchable barrier cell 30 and the switchable lens cell 40 switch the traveling path of light in the 2D image and the 3D image. Therefore, each of the pixels may be designed to implement a two-dimensional image.

The cathode electrode 12 is formed on the pixel array 11 of the OLED display panel 10 as shown in FIG. 1. On the pixel array 11, an organic / inorganic protective film for protecting organic materials of the pixel array 11 from moisture and air may be formed in multiple layers.

A touch screen 20 is formed on the display panel 10 including a touch sensor 21 capable of detecting the presence or absence of a user's touch. The touch screen 20 of the present invention may be implemented as a touch screen device of any touch method, such as a resistive method, a capacitive method, a pressure method, an infrared method, a surface ultrasonic method, and the like.

The touch screen 20 includes fourth and fifth transparent substrates 104 and 105 facing each other. The fourth transparent substrate 104 is a first shared substrate, and touch sensors 21 to which a voltage is applied to recognize a user's touch are formed between the fourth and fifth transparent substrates 104 and 105.

The switchable barrier cell 30 is disposed between the display panel 10 and the touch screen 20. 2 and 3 are diagrams illustrating how the switchable barrier cell 30 implements two-dimensional and three-dimensional images. 2 and 3, the switchable barrier cell 30 may include the third and fourth transparent substrates 103 and 104, the split electrodes 31A and 31B, the liquid crystal layer 32, and the common electrode 33. And polarizing plates 34A and 34B.

The third and fourth transparent substrates 103 and 104 of the switchable barrier cell 30 face each other. The third and fourth transparent substrates 103 and 104 may be implemented with glass or film. A plurality of split electrodes are patterned on the third transparent substrate 103. The common electrode 33 is formed of one film on the fourth transparent substrate 104.

The switchable barrier cell 30 includes a liquid crystal layer 32 formed between the third and fourth transparent substrates 103 and 104. The liquid crystal molecules of the liquid crystal layer 32 are rotated by the voltage difference between the common electrode 33 and the split electrodes 31A and 31B.

As shown in FIG. 2, since a voltage difference does not substantially occur between the common electrode 33 and the split electrodes 31A and 31B of the switchable barrier cell 30, the liquid crystal molecules do not rotate. Therefore, light passes through the liquid crystal layer 32 of the switchable barrier cell 30 as it is, and the user sees a two-dimensional image without parallax between left and right eyes.

As shown in FIG. 3, in the 3D image, a voltage difference occurs due to a voltage applied to the common electrode 33 and the split electrodes 31A and 31B of the switchable barrier cell 30. The voltage applied to the common electrode 33 and the second n (n is positive) electrodes 31B does not substantially generate a voltage difference, and thus the liquid crystal molecules do not rotate. A voltage difference is generated between the common electrode 33 and the second n-1 electrodes 31A. The liquid crystal between the common electrode 33 and the 2n-1 electrodes 31A rotates 90 degrees.

A first polarizing plate 34A is attached to the third transparent substrate 103 of the switchable barrier cell 30. A second polarizing plate 34B intersecting with the first polarizing plate 34A is attached to the fourth transparent substrate 104.

The liquid crystal molecules existing between the common electrode 33 and the second n electrodes 31B do not rotate. In the region between the common electrode 33 and the second n electrodes 31B, the light passing through the first polarizing plate 34A may pass through the second polarizing plate 34B due to the change in polarization characteristics.

The liquid crystal molecules present between the common electrode 33 and the second n-1 electrodes 31A rotate 90 degrees. In the region between the common electrode 33 and the second n-1 electrodes 31A, the light passing through the first polarizing plate 34A does not change the polarization property and thus cannot pass through the second polarizing plate 34B. Therefore, the region between the common electrode 33 and the 2n-1 electrodes 31A serves as a barrier to block light.

Due to the area blocking the light of the liquid crystal layer 32 in the switchable barrier cell 30, the light of the right image RGB (RGB _R ) proceeds to the right eye of the user, and the light of the left image RGB (RGB _L ) is the user. Proceed to the left eye of. Therefore, since the left and right eyes of the user can feel parallax, a 3D image is realized.

In the present invention, a sealant 71 is used as a bonding member for bonding the display panel 10 and the switchable barrier cell 30 to each other. The sealant 71 may be either an ultraviolet curable sealant or a heat curable sealant.

4 is a view showing a second embodiment of the present invention. Referring to FIG. 4, the present invention includes a display panel 10, a touch screen 20, and a switchable lens cell 40. The touch screen 20 and the switchable lens cell 40 share the fourth transparent substrate 104, and the fourth transparent substrate 104 corresponds to the first shared substrate. The fifth transparent substrate 105 faces the fourth transparent substrate 104. The touch sensors 21 of the touch screen 20 are formed between the fourth and fifth transparent substrates 104 and 105.

A switchable lens cell 40 for implementing a 3D image is disposed between the display panel 10 and the touch screen 20. 5 and 6 illustrate how the switchable lens cell 40 implements two-dimensional and three-dimensional images. 5 and 6, the switchable lens cell 40 includes third and fourth transparent substrates 103 and 104, a common electrode 43, split electrodes 41A and 41B, and a liquid crystal layer 42. ).

The third and fourth transparent substrates 103 and 104 of the switchable lens cell 40 face each other. The third and fourth transparent substrates 103 and 104 may be implemented with glass or film. A plurality of split electrodes 41A and 41B are patterned on the third transparent substrate 103. The split electrodes 41A and 41B are formed in two layers, and the lower split electrodes 41A are positioned at intervals between the upper split electrodes 41B. The interval between the split electrodes 41A and 41B is 4 µm or more. An insulating film 44 is formed between the lower divided electrodes 41A and the upper divided electrodes 41B. The insulating film 44 is for preventing a short circuit between the divided electrodes 41A and the divided electrodes 41B in the lower part. The common electrode 43 is formed of one film on the fourth transparent substrate 104.

The switchable lens cell 40 includes a liquid crystal layer 42 between the third and fourth transparent substrates 103 and 104. The liquid crystal molecules of the liquid crystal layer 42 are rotated by the voltage difference between the common electrode 43 and the divided electrodes 41A and 41B. The thickness of the liquid crystal layer 42 is determined by the rear distance of the lens formed by the liquid crystal molecules when a voltage is applied to the switchable lens cell 40. If the thickness of the liquid crystal layer 42 is reduced, the amount of liquid crystal injected into the liquid crystal layer 42 can be reduced, thereby reducing the cost.

As shown in FIG. 5, since a voltage difference does not substantially occur between the common electrode 43 and the split electrodes 41A and 41B of the switchable lens cell 40, the liquid crystal molecules do not rotate. Therefore, light passes through the switchable lens cell 40 without refraction, and the user sees a two-dimensional image without parallax between the left and right eyes.

As shown in FIG. 6, in the 3D image, a voltage difference occurs due to a voltage applied to the common electrode 43 and the split electrodes 41A and 41B of the switchable lens cell 40. The liquid crystal molecules rotate by the generated voltage difference. In order to realize a 3D image using the switchable lens cell 40, it is important to give a degree of voltage difference to the liquid crystal molecules so as to rotate the liquid crystal molecules. The switchable lens cell 40 is made by determining the electrode width / spacing of the lens in consideration of the rotation of the liquid crystal molecules, and then calculating the optimum applied voltage of the liquid crystal molecules. The voltages of the split electrodes 41A and 41B are gradually different so that the voltage of the liquid crystal molecules positioned at the center of the lens is greater than the voltage of the liquid crystal molecules positioned at the edge of the lens.

In FIG. 6, the liquid crystal molecules of the switchable lens cell 40 are rotated by the voltage difference of the voltage applied to each of the common electrode 43 and the split electrodes 41A and 41B. Although the voltage applied to the common electrode 43 is constant, the voltage applied to each of the split electrodes 41A and 41B is different, so that the voltage difference is different for each liquid crystal molecule of the liquid crystal layer 42. As a result, the liquid crystal molecules rotate to form a convex lens according to the voltage difference as shown in FIG. 6. Light of the right image RGB (RGB _R ) is refracted by the liquid crystal layer 42 of the switchable lens cell 40 implemented in the form of a convex lens to the right eye of the user. The light of the left image RGB (RGB _L ) is refracted to the left eye of the user by the liquid crystal layer 42 of the switchable lens cell 40 implemented in the form of a convex lens. Therefore, since the left and right eyes of the user may feel parallax, a 3D image is realized.

7 is a view showing a third embodiment of the present invention. Referring to FIG. 7, the present invention includes a display panel 10, a touch screen 20, and a lenticular lens cell 50. The touch screen 20 and the lenticular lens cell 50 share the fourth transparent substrate 104, and the fourth transparent substrate 104 corresponds to the first shared substrate. The fifth transparent substrate 105 faces the fourth transparent substrate 104. The touch sensors 21 of the touch screen 20 are formed between the fourth and fifth transparent substrates 104 and 105.

The lenticular lens cell 50 is disposed between the display panel 10 and the touch screen 20. 8 is a diagram illustrating the lenticular lens cell 50. Referring to FIG. 8, the lenticular stereoscopic image display device includes a lenticular lens 51 positioned between the display panel 10 and the user. The lenticular lens cell 50 cannot switch two-dimensional and three-dimensional images, and implements a three-dimensional stereoscopic image by separating a right eye image and a left eye image.

9 is a diagram showing a fourth embodiment of the present invention. Referring to FIG. 9, the present invention includes a display panel 10, a touch screen 20, and a barrier film 60. The barrier film 60 corresponds to the first shared substrate, and the third transparent substrate 113 faces the barrier film 60. The touch sensors 21 of the touch screen 20 are formed between the barrier film 60 and the third transparent substrate 113.

The barrier film 60 is disposed between the display panel 10 and the touch screen 20. 10 shows a barrier film 60. Referring to FIG. 10, the barrier film 60 selectively blocks light emitted from the display panel 10 by using a barrier 61 that partially blocks light. The barrier film 60 cannot switch a 2D image and a 3D image, and implements a 3D stereoscopic image by dividing a left eye image and a right eye image.

11 to 14, the touch screen 20 and the lens / barrier cell share one substrate, and the touch sensors 21 are formed on the bottom surface of the first shared substrate facing the lens / barrier cell. 11 to 14, the display panel 10 and the lens / barrier cell are bonded by the sealant 71. 11 to 13 include the first to fourth transparent substrates 121, 122, 123, and 124, and the embodiment of FIG. 14 includes the first to third transparent substrates 121, 122, and 133. Include.

11 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a fifth embodiment of the present invention. Referring to FIG. 11, the present invention includes a display panel 10, a touch screen 20, and a switchable barrier cell 30.

In FIG. 11, the touch screen 20 and the switchable barrier cell 30 share a fourth transparent substrate 124, and the fourth transparent substrate 124 corresponds to the first shared substrate. The touch sensors 21 are formed on a lower surface of the fourth transparent substrate 124 facing the switchable barrier cell 30, and the insulating film 80 covers the touch sensors 21.

12 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a sixth embodiment of the present invention. Referring to FIG. 12, the present invention includes a display panel 10, a touch screen 20, and a switchable lens cell 40.

In FIG. 12, the touch screen 20 and the switchable lens cell 40 share a fourth transparent substrate 124, and the fourth transparent substrate 124 corresponds to the first shared substrate. The touch sensors 21 are formed on the lower surface of the fourth transparent substrate 124 facing the switchable lens cell 40, and the insulating film 80 covers the touch sensors 21.

13 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a seventh embodiment of the present invention. Referring to FIG. 13, the present invention includes a display panel 10, a touch screen 20, and a lenticular lens cell 50.

In FIG. 13, the touch screen 20 and the lenticular lens cell 50 share a fourth transparent substrate 124, and the fourth transparent substrate 124 corresponds to the first shared substrate. The touch sensors 21 are formed on the lower surface of the fourth transparent substrate 124 facing the lenticular lens cell 50, and the insulating film 80 covers the touch sensors 21.

14 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to an eighth embodiment of the present invention. Referring to FIG. 14, the present invention includes a display panel 10, a touch screen 20, and a barrier film 60.

In FIG. 14, the third transparent substrate 133 corresponds to the first shared substrate. The touch sensors 21 are formed on the bottom surface of the third transparent substrate 133 facing the barrier film 60, and the insulating film 80 covers the touch sensors 21.

15 to 18, the touch screen 20 and the lens / barrier cell share a single substrate, and the touch sensors 21 are formed between the first shared substrate and the touch screen transparent substrate. 15 to 18, the display panel 10 and the lens / barrier cell are bonded by the transparent double-sided adhesive film 72. 15 to 17 include first to fifth transparent substrates 101, 102, 103, 104 and 105, and the embodiment of FIG. 18 includes first to third transparent substrates 101, 102 and 113. ).

15 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a ninth embodiment of the present invention. Referring to FIG. 15, the present invention includes a display panel 10, a touch screen 20, and a switchable barrier cell 30.

In FIG. 15, the touch screen 20 and the switchable barrier cell 30 share a fourth transparent substrate 104, and the fourth transparent substrate 104 corresponds to the first shared substrate. The fifth transparent substrate 105 faces the fourth transparent substrate 104. The touch sensors 21 of the touch screen 20 are formed between the fourth and fifth transparent substrates 104 and 105.

As shown in Figure 15, the present invention can use a transparent double-sided adhesive film 72 as a bonding member. The transparent double-sided adhesive film 72 includes a film base, first and second adhesive layers, and first and second protective films.

The first adhesive layer is formed on the first adhesive surface of the film base. The first adhesive layer is protected by the first protective film. The second adhesive layer is formed on the second adhesive surface opposite to the first adhesive surface in the film base. The second adhesive layer is protected by the second protective film. The first adhesive layer faces the lens / barrier cell, and the second adhesive layer faces the display panel 10.

In the bonding process of the transparent double-sided adhesive film 72, heat and pressure must be applied at the same time so as not to generate bubbles, and the laminating process may be performed. The bonding process of the transparent double-sided adhesive film 72 is a low temperature process of 70 ° C. or more and 150 ° C. or less due to the temperature characteristic of the liquid crystal of the switchable lens cell 40. This is because the transparent double-sided adhesive film 72 may not be properly bonded at a temperature below 70 ° C., and the liquid crystal is cured at a temperature exceeding 150 ° C. so that the switchable lens cell 40 may not operate properly. Pressure is the pressure that is normally applied in the laminating process by the self-weight pressure of the roller.

As a joining process, the method of joining glass and glass by frit glass is known. The frit glass is characterized by a high temperature process performed at a temperature of 400 ° C or higher. However, since the liquid crystal is cured at a temperature of 150 ° C. or higher, when the liquid crystal layer exists like the switchable barrier cell 30 and the switchable lens cell 40, the frit glass bonding process is impossible. In addition, the frit glass bonding process has a disadvantage that it is made at a high temperature compared to the transparent double-sided adhesive film 72 bonding process.

16 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a tenth embodiment of the present invention. Referring to FIG. 16, the present invention includes a display panel 10, a touch screen 20, and a switchable lens cell 40.

In FIG. 16, the touch screen 20 and the switchable lens cell 40 share the fourth transparent substrate 104, and the fourth transparent substrate 104 corresponds to the first shared substrate. The fifth transparent substrate 105 faces the fourth transparent substrate 104. The touch sensors 21 of the touch screen 20 are formed between the fourth and fifth transparent substrates 104 and 105.

FIG. 17 illustrates a stereoscopic image display device including a touch screen 20 according to an eleventh embodiment of the present invention. Referring to FIG. 17, the present invention includes a display panel 10, a touch screen 20, and a lenticular lens cell 50.

In FIG. 17, the touch screen 20 and the lenticular lens cell 50 share a fourth transparent substrate 104, and the fourth transparent substrate 104 corresponds to the first shared substrate. The fifth transparent substrate 105 faces the fourth transparent substrate 104. The touch sensors 21 of the touch screen 20 are formed between the fourth and fifth transparent substrates 104 and 105.

18 is a view showing a stereoscopic image display device including a touch screen 20 according to a twelfth embodiment of the present invention. Referring to FIG. 18, the present invention includes a display panel 10, a touch screen 20, and a barrier film 60.

In FIG. 18, the barrier film 60 corresponds to the first shared substrate, and the third transparent substrate 113 faces the barrier film 60. The touch sensors 21 of the touch screen 20 are formed between the barrier film 60 and the third transparent substrate 113.

19 to 22, the touch screen 20 and the lens / barrier cell share one substrate, and the touch sensors 21 are formed on the bottom surface of the first shared substrate facing the lens / barrier cell. 19 to 22, the display panel 10 and the lens / barrier cell are bonded by the transparent double-sided adhesive film 72. 19 to 21 include first to fourth transparent substrates 121, 122, 123, and 124, and the embodiment of FIG. 22 includes first to third transparent substrates 121, 122, and 133. Include.

19 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a thirteenth embodiment of the present invention. Referring to FIG. 19, the present invention includes a display panel 10, a touch screen 20, and a switchable barrier cell 30.

In FIG. 19, the touch screen 20 and the switchable barrier cell 30 share a fourth transparent substrate 124, and the fourth transparent substrate 124 corresponds to the first shared substrate. The touch sensors 21 are formed on a lower surface of the fourth transparent substrate 124 facing the switchable barrier cell 30, and the insulating film 80 covers the touch sensors 21.

20 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen 20 according to a fourteenth embodiment of the present invention. Referring to FIG. 20, the present invention includes a display panel 10, a touch screen 20, and a switchable lens cell 40.

In FIG. 20, the touch screen 20 and the switchable lens cell 40 share a fourth transparent substrate 124, and the fourth transparent substrate 124 corresponds to the first shared substrate. The touch sensors 21 are formed on the lower surface of the fourth transparent substrate 124 facing the switchable lens cell 40, and the insulating film 80 covers the touch sensors 21.

21 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a fifteenth embodiment of the present invention. Referring to FIG. 21, the present invention includes a display panel 10, a touch screen 20, and a lenticular lens cell 50.

In FIG. 21, the touch screen 20 and the lenticular lens cell 50 share a fourth transparent substrate 124, and the fourth transparent substrate 124 corresponds to the first shared substrate. The touch sensors 21 are formed on the lower surface of the fourth transparent substrate 124 facing the lenticular lens cell 50, and the insulating film 80 covers the touch sensors 21.

22 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a sixteenth embodiment of the present invention. Referring to FIG. 22, the present invention includes a display panel 10, a touch screen 20, and a barrier film 60.

In FIG. 22, the third transparent substrate 133 corresponds to the first shared substrate. The touch sensors 21 are formed on a lower surface of the third transparent substrate 133 facing the barrier film 60, and the insulating film 80 covers the touch sensors 21. The transparent double-sided adhesive film 72 bonds the display panel 10 and the barrier film 60.

23 to 26, the touch screen 20 and the lens / barrier cell share a single substrate, and are formed between the first shared substrate and the transparent substrate of the touch screen 20. 23 to 26, the display panel 10 and the lens / barrier cell share another substrate, and the pixel array 11 and the lens / barrier cell of the display panel 10 are transparent double-sided adhesive film 72. ) Is joined. 23 to 25 include first to fourth transparent substrates 141, 142, 143 and 144, and the embodiment of FIG. 26 includes first and second transparent substrates 141 and 152. .

FIG. 23 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen 20 according to a seventeenth exemplary embodiment of the present invention. Referring to FIG. 23, the present invention includes a display panel 10, a touch screen 20, and a switchable barrier cell 30.

In FIG. 23, the touch screen 20 and the switchable barrier cell 30 share a third transparent substrate 143, and the third transparent substrate 143 corresponds to the first shared substrate. The fourth transparent substrate 144 faces the third transparent substrate 143. The touch sensors 21 are formed between the third and fourth transparent substrates 143 and 144. The display panel 10 and the switchable barrier cell 30 share the second transparent substrate 142, and the second transparent substrate 142 corresponds to the second shared substrate.

The transparent double-sided adhesive film 72 bonds the pixel array 11 and the second transparent substrate 142 of the display panel 10 to each other. In the case of the switchable barrier cell 30, as shown in FIG. 23, the first polarizing plate 34A is attached to the second transparent substrate 142, so that the transparent double-sided adhesive film 72 is formed of a pixel array (eg, a display panel 10). 11) and the first polarizing plate 34A of the second transparent substrate 142 are bonded to each other.

As described with reference to FIG. 15, the bonding process of the transparent double-sided adhesive film 72 should be applied simultaneously with heat and pressure so as not to generate bubbles, and may be a laminating process. In addition, since the present embodiment shares two substrates, the number of substrates can be reduced, further reducing the cost, and further thinning.

24 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to an eighteenth embodiment of the present invention. Referring to FIG. 24, the present invention includes a display panel 10, a touch screen 20, and a switchable lens cell 40.

In FIG. 24, the touch screen 20 and the switchable lens cell 40 share the third transparent substrate 143, and the third transparent substrate 143 corresponds to the first shared substrate. The fourth transparent substrate 144 faces the third transparent substrate 143. The touch sensors 21 are formed between the third and fourth transparent substrates 143 and 144. The display panel 10 and the switchable lens cell 40 share the second transparent substrate 142, and the second transparent substrate 142 corresponds to the second shared substrate.

25 is a diagram illustrating a stereoscopic image display device including a touch screen 20 according to a nineteenth embodiment of the present invention. Referring to FIG. 25, the present invention includes a display panel 10, a touch screen 20, and a lenticular lens cell 50.

In FIG. 25, the touch screen 20 and the lenticular lens cell 50 share the third transparent substrate 143, and the third transparent substrate 143 corresponds to the first shared substrate. The fourth transparent substrate 144 faces the third transparent substrate 143. The touch sensors 21 are formed between the third and fourth transparent substrates 143 and 144. The display panel 10 and the lenticular lens cell 50 share the second transparent substrate 142, and the second transparent substrate 142 corresponds to the second shared substrate.

FIG. 26 illustrates a stereoscopic image display device including a touch screen 20 according to a twentieth embodiment of the present invention. Referring to FIG. 26, the present invention includes a display panel 10, a touch screen 20, and a barrier film 60.

In FIG. 26, the second transparent substrate 152 faces the barrier film 60. The touch sensors 21 are formed between the barrier film 60 and the second transparent substrate 152. The transparent double-sided adhesive film 72 bonds the pixel array 11 and the barrier film 60 of the display panel 10 to each other.

27 to 30, the touch screen 20 and the lens / barrier cell share a single substrate, and the touch sensors 21 are formed on the bottom surface of the first shared substrate facing the lens / barrier cell. 27 to 30, the display panel 10 and the lens / barrier cell share another substrate, and the pixel array 11 and the lens / barrier cell of the display panel 10 are transparent double-sided adhesive film 72. ) Is joined. 27 to 29 include first to third transparent substrates 161, 162 and 163, and the embodiment of FIG. 30 includes first and second transparent substrates 161 and 172.

27 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a twenty-first embodiment of the present invention. Referring to FIG. 27, the present invention includes a display panel 10, a touch screen 20, and a switchable barrier cell 30.

In FIG. 27, the touch screen 20 and the switchable barrier cell 30 share the third transparent substrate 163, and the third transparent substrate 163 corresponds to the first shared substrate. The touch sensors 21 are formed on a lower surface of the third transparent substrate 163 facing the switchable barrier cell 30, and the insulating film 80 covers the touch sensors 21. The display panel 10 and the switchable barrier cell 30 share the second transparent substrate 162, and the second transparent substrate 162 corresponds to the second shared substrate.

28 is a cross-sectional view illustrating a stereoscopic image display apparatus including a touch screen 20 according to a twenty-second embodiment of the present invention. Referring to FIG. 28, the present invention includes a display panel 10, a touch screen 20, and a switchable lens cell 40.

In FIG. 28, the touch screen 20 and the switchable lens cell 40 share the third transparent substrate 163, and the third transparent substrate 163 corresponds to the first shared substrate. The touch sensors 21 are formed on the lower surface of the third transparent substrate 163 facing the switchable lens cell 40, and the insulating film 80 covers the touch sensors 21. The display panel 10 and the switchable lens cell 40 share the second transparent substrate 162, and the second transparent substrate 162 corresponds to the second shared substrate.

29 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a twenty-third embodiment of the present invention. Referring to FIG. 29, the present invention includes a display panel 10, a touch screen 20, and a lenticular lens cell 50.

In FIG. 29, the touch screen 20 and the lenticular lens cell 50 share the third transparent substrate 163, and the third transparent substrate 163 corresponds to the first shared substrate. The touch sensors 21 are formed on the lower surface of the third transparent substrate 163 facing the lenticular lens cell 50, and the insulating film 80 covers the touch sensors 21. The display panel 10 and the lenticular lens cell 50 share the second transparent substrate 162, and the second transparent substrate 162 corresponds to the second shared substrate.

30 is a cross-sectional view illustrating a stereoscopic image display device including a touch screen 20 according to a twenty-fourth embodiment of the present invention. Referring to FIG. 30, the present invention includes a display panel 10, a touch screen 20, and a barrier film 60.

In FIG. 30, the touch sensors 21 are formed on the bottom surface of the second transparent substrate 172 facing the barrier film 60, and the insulating film 80 covers the touch sensors 21. The transparent double-sided adhesive film 72 bonds the pixel array 11 and the barrier film 60 of the display panel 10 to each other.

FIG. 31 is a block diagram illustrating a 3D image display device including the touch screen 20 implemented by the switchable barrier cell 30 of FIG. 1. Referring to FIG. 31, the stereoscopic image display apparatus of the present invention includes a display panel 10, a switchable barrier cell 30, a touch screen 20, a display panel driver 210, a switchable barrier cell driver 220, The touch screen controller 230 and the controller 240 are provided. The display panel 10, the switchable barrier cell 30, and the touch screen 20 have been fully described above.

The display panel driver 210 supplies the data voltages to the data lines of the pixel array 11 and supplies the scan pulses to the scan lines to drive the pixel array 11. The display panel driver 210 includes a data driver circuit and a gate driver circuit. The gate driving circuit supplies gate signals to the gate lines to sequentially drive the gate lines. The data driving circuit converts the digital data signal input from the controller 240 into an analog data signal. The data driving circuit supplies an analog data signal to the data lines whenever a gate signal is supplied.

The switchable barrier cell driver 220 supplies a driving voltage to the common electrode 33 and the split electrodes 31A and 31B of the switchable barrier cell 30. The switchable barrier cell driver 220 supplies a driving voltage differently in 2D and 3D images under the control of the controller 240. When implementing the 2D image, the switchable barrier cell driver 220 supplies a driving voltage such that a voltage difference does not substantially occur between the common electrode 33 and the split electrodes 31A and 31B. When implementing the 3D image, the switchable barrier cell driver 220 supplies a driving voltage so that a voltage difference does not substantially occur between the voltages applied to the common electrode 33 and the second n electrodes 31B. The switchable barrier cell driver 220 supplies a driving voltage so that a voltage difference is generated between the common electrode and the second n-1 electrodes 31A.

The touch sensors 21 of the touch screen 20 are supplied with a predetermined driving voltage through wires not shown. The touch sensors 21 detect a change in resistance, current, or capacitance that change when a touch is input, and supply the output to the touch screen controller 230. The touch screen controller 230 converts the analog output of the touch sensors 21 into digital data, and calculates a coordinate value indicating a touch input point by using a known touch recognition algorithm that analyzes the digital data.

The controller 240 supplies the digital video data and timing signals Vsync, Hsync, DE, and CLK synchronized with the digital video data to the display panel driver 210. The timing signals Vsync, Hsync, DE, and CLK include a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE, a clock signal CLK, and the like.

The controller 240 generates a data control signal for controlling the data driver circuit of the display panel driver 210 and a gate control signal for controlling the gate driver circuit of the display panel driver 210 using a plurality of timing signals. The data control signal generated by the controller 240 is supplied to the data driving circuit to control the data driving circuit. The gate control signal generated by the controller 240 is supplied to the gate driving circuit to control the gate driving circuit.

The controller 240 generates a signal for controlling the driving voltage differently in the 2D and 3D images in the switchable barrier cell driver 220. The switchable barrier cell 30 driving control signal generated by the controller 240 is supplied to the switchable barrier cell driver 220 to control the switchable barrier cell driver 220.

The controller 240 executes an application corresponding to the coordinate value input from the touch screen controller 230 and synchronizes operations of the display panel driver 210 and the touch screen controller 220.

The stereoscopic image display device including the touch screen 20 implemented as the switchable barrier cell 30 of FIGS. 11, 15, 19, 23, and 27 may be implemented as shown in FIG. 31. In addition, the stereoscopic image display device including the touch screen 20 implemented by the switchable lens cell 40 of FIGS. 4, 12, 16, 20, 24, and 28 may be implemented as shown in FIG. 31. have.

FIG. 32 is a block diagram illustrating a stereoscopic image display device including the touch screen 20 implemented with the lenticular lens cell 50 of FIG. 7. Since the lenticular lens cell 50 cannot switch the 2D image and the 3D image, and implements only the 3D image, the lenticular lens cell 50 does not need the switchable barrier cell driver 220. The display panel driver 310, the touch screen controller 330, and the controller 340 have been described with reference to FIG. 31.

The stereoscopic image display device including the touch screen 20 implemented with the lenticular lens cells 50 of FIGS. 13, 17, 21, 25, and 29 may be implemented as shown in FIG. 32. In addition, the stereoscopic image display apparatus including the touch screen 20 implemented with the barrier film 60 of FIGS. 9, 14, 18, 22, 26, and 30 may be implemented as shown in FIG. 32.

33 is a cross-sectional view illustrating a stereoscopic image display device in which the touch screen 20, the lens / barrier cell, and the display panel 10 are bonded by the sealant 71. In the stereoscopic image display device including the touch screen 20, the display panel 10 and the lens / barrier cell are bonded by the sealant 71, and the touch screen 20 and the lens / barrier cell are sealant 71 as shown in FIG. 33. May be considered.

When the touch screen 20, the lens / barrier cell, and the display panel 10 are bonded by the sealant 71, at least six transparent substrates 181, 182, 183, 184, 185, and 186 are required, resulting in high cost. There is a lot of trouble. In addition, there is a problem that it is difficult to thin the stereoscopic image display device.

In FIG. 33, an air layer 90 exists between the touch screen 20 and the switchable barrier cell 30. As a result, since the refraction angle of the light is lowered, there is a problem that the reflection of the light occurs more frequently and the visibility is lowered.

As described above, those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

10: display panel 11: pixel array
12: cathode electrode
20: touch screen 21: touch sensor
30: switchable barrier cells 31A, 31B, 41A, 41B: split electrodes
32, 42: liquid crystal layer 33, 43: common electrode
34A, 34B: polarizer
40: switchable lens cell 44: insulating film
50: lenticular lens cell 51: lenticular lens
60: barrier film 61: barrier
71: sealant 72: transparent double-sided adhesive film
80: insulating film 90: air layer
210 and 310: display panel driver 220: lens / barrier cell driver
230, 330: touch screen controller 240, 340: controller
101, 121, 141, 161, and 181: first transparent substrate
102, 122, 142, 152, 162, 172, 182: second transparent substrate
103, 113, 123, 133, 143, 163 and 183: third transparent substrate
104, 124, 144, 164, and 184: fourth transparent substrate
105, 185: fifth transparent substrate
186: sixth transparent substrate

Claims (8)

A display panel including a pixel array;
A touch screen formed on the display panel; And
A lens / barrier cell disposed between the display panel and the touch screen;
And the touch screen and the lens / barrier cell share a first shared substrate. The method of claim 1,
The touch screen further includes a transparent substrate facing the first shared substrate,
The touch sensors of the touch screen are formed between the first shared substrate and the transparent substrate. The method of claim 1,
The touch sensors of the touch screen are formed on a lower surface of the first sharing substrate, an insulating film covering the touch sensors is formed on the lower surface of the first sharing substrate, and the lower surface of the first sharing substrate is formed on the lens / barrier cell. Stereoscopic display device characterized in that facing. The method of claim 1,
The lens / barrier cell is any one of a switchable barrier cell, a switchable lens cell, a lenticular lens cell, and a barrier film,
And wherein the switchable barrier cell and the switchable lens cell comprise an electrically controllable liquid crystal. The method of claim 1,
And a bonding member for bonding the display panel to the lens / barrier cell. The method of claim 5, wherein
And the bonding member is one of a sealant and a transparent double-sided adhesive film. The method of claim 1,
The display panel and the lens / barrier cell share a second shared substrate,
And the second shared substrate and the pixel array of the display panel are bonded by a transparent double-sided adhesive film. The method according to any one of claims 1 to 7,
The display panel includes a liquid crystal display device, a field emission display device, a plasma display panel, an organic light emitting diode device, and an electrophoretic display device.

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